CN201213164Y

CN201213164Y - Earthing construction improvement for flexible flat cable

Info

Publication number: CN201213164Y
Application number: CNU2008200095463U
Authority: CN
Inventors: 叶时堃
Original assignee: TIANRUI ELECTRONIC SCIENCE AND TECHNOLOGY DEVELOPMENT (KUNSHAN) Co Ltd
Current assignee: TIANRUI ELECTRONIC SCIENCE AND TECHNOLOGY DEVELOPMENT (KUNSHAN) Co Ltd
Priority date: 2008-05-13
Filing date: 2008-05-13
Publication date: 2009-03-25
Anticipated expiration: 2018-05-13

Abstract

The utility model discloses an improved grounding structure of a soft drop-out line, which is mainly composed of a conductor line layer; a plurality of signal transmission lines are arranged in the conductor line layer, insulating layers are respectively arranged on the upside and the underside of the conductor line layer, and a metal shielded layer is wrapped on the outer side of the insulating layer; a grounding line is arranged in the conductor line layer, the grounding line is provided with at least a connecting lead which is mutually contacted and arranged with the grounding line, the connecting lead is folded outward to be contact with the metal shielding level, one side of the connecting lead is contacted with the grounding line, and the other side can be exposed outside the metal shielding layer and contacted with the metal shielding layer to form the grounding function.

Description

The ground structure improvement of flexible flat cable

Technical field

The ground structure improvement of the relevant a kind of flexible flat cable of the utility model, refer to especially a kind of simple in structure and have the electromagnetic wave shielding effect, and the ground structure of grounding function improvement.

Background technology

Along with advancing by leaps and bounds of electronics technology, various electronic products day by day popularly are applied in the middle of our work and life.In various electronic products, winding displacement is widely applied with the approach as the signal transmission.Yet, winding displacement is when being used to transmission signal, but can supervene high frequency and high-octane electromagnetic wave, the interference that not only can generate electromagnetic waves of these electromagnetic waves to each parts in the electronic product, more likely cause the harm on the health, so various countries all order quite strict regulation for the electromagnetic intensity that electronic product produced.

The Electromagnetic Interference problem that is met with when using winding displacement for solving, known techniques are to utilize conductive fabric coating winding displacement, and pull out a lead and make its contact metalwork on every side from conductive fabric, or make directly contact metalwork on every side of conductive fabric.Thus, the electromagnetic wave that conductive fabric is produced with regard to the maskable winding displacement, and with its directly or via lead lead off to around metalwork, the electromagnetic wave outside of avoiding winding displacement by this and being produced is propagated.Yet said method must labor intensive be coated on conductive fabric on the winding displacement, and not only labor intensive is also wasted man-hour.In addition, not only the volume change is big behind the winding displacement coated with conductive cloth, more exists to be difficult for bending and unworkable problem.

So also occurring other on the market plants device, be to practise the top view that winding displacement is arranged as Fig. 1, and Fig. 2 is the profile of Fig. 1 along the I-I line.Please refer to Figure 1 and Figure 2, this winding displacement 100 comprises an insulation material 110, many signal line 120, at least one earth connection 130 and conductive foil 140.Wherein, insulation material 110 for example be poly-vinegar (polyester, PET) or other insulation material.Signal line 120 is disposed in the insulation material 110, in order to transmission signal.One first 132 of earth connection 130 be exposed to the insulation material 110 outside, that is the part surface of earth connection 130 be exposed to as the insulation material 110 outside, shown in Figure 2.In Fig. 1, the first 132 of earth connection 130 is covered by conductive foil 140, only illustrates its position with the dotted line summary.Conductive foil 140 covers insulation material 110 and contacts with the first 132 of earth connection 130.From the above, because conductive foil 140 covers insulation material 110, that is signal line 120 is also surrounded by conductive foil 140, therefore the electromagnetic wave that produced when transmission signal of signal line 120 will be subjected to the shielding of conductive foil 140 and can outwards not propagate, and can outwards lead off by the earth connection 130 that contacts with conductive foil 140; Yet its processing of above-mentioned earthing device is comparatively numerous and diverse.

The utility model content

The technical problem that the utility model solved is promptly providing a kind of simple in structure and have the electromagnetic wave shielding effect, and the improvement of the ground structure of grounding function.

For reaching above-mentioned purpose, flexible flat cable of the present utility model mainly is provided with a conductor line layer, be provided with a plurality of signal transmission lines in this conductor line layer, and upper and lower two side surface of this conductor line layer are respectively equipped with insulating barrier, and this insulating barrier then is coated with the metal shielding layer outward, wherein, is provided with earth connection in this conductor line layer, this earth connection is provided with at least one and is in contact with one another the lead that is connected of arrangement with it, and this connection lead turns down outwardly to this metal shielding layer and is in contact with it.

The beneficial effects of the utility model are: when flexible flat cable uses, the electromagnetic wave that each signal transmission line is produced when transmission signal will be subjected to the shielding of metal shielding layer and can outwards not propagate, and can be by outwards leading off, to reach the function of ground connection with being connected lead and earth connection of metal shielding layer contact.

Description of drawings

Fig. 1 is a top view of commonly using flexible flat cable;

Fig. 2 is the profile of Fig. 1 along the I-I line;

Fig. 3 is the structural perspective of flexible flat cable in the utility model;

Fig. 4 is the structural representation of flexible flat cable in the utility model;

Fig. 5 is another structural representation of flexible flat cable in the utility model;

Fig. 6 is the structural representation of fixture in the utility model;

Fig. 7 is another structural representation of fixture in the utility model.

[figure number explanation]

Winding displacement 100 insulation materials 110

Signal line 120 earth connections 130

First's 132 conductive foil 140

Flexible flat cable 2 conductor line layers 21

Signal transmission line 211 earth connections 212

Connect lead 213 first insulating barriers 221

Second insulating barrier, 222 metal shielding layers 23

Bonding coat 24 is pasted agent 251

Adhesive tape 252

Embodiment

Characteristics of the present utility model can be consulted the detailed description of the graphic and embodiment of this case and obtained to be well understood to.

As Fig. 3 to Fig. 5 is the first example structure schematic diagram of flexible flat cable in the utility model, and it includes this flexible flat cable 2 at least:

Conductor line layer 21, this conductor line layer 21 includes a plurality of signal transmission lines that are arranged in parallel 211 and at least one earth connection 212, and being provided with at least one, this earth connection 212 is connected lead 213 with it is in contact with one another arrangement, among the embodiment as shown in the figure, this earth connection 212 be connected lead 213 upper and lower arrangements.

Two insulating barriers, each insulating barrier is respectively first, second insulating barrier 221,222, each insulating barrier 221,222 can be PETG (PET), and this first insulating barrier 221 is located at conductor line layer 21 uper side surface, and this second insulating barrier 222 is located at conductor line layer 21 downside surface.

Metal shielding layer 23, this metal shielding layer 23 can be aluminium foil layer, is located at these first, second insulating barrier 221,222 outsides and its coating is covered.

And 221,222 of this conductor line layer 21 and each insulating barriers are provided with bonding coat 24, and each insulating barrier 221,222 and 23 of metal shielding layers are provided with bonding coat 24, and above-mentioned bonding coat 24 can be PUR, fixes with the bonding that constitutes each interlayer.

Wherein, this connection lead 213 turns down outwardly to this metal shielding layer 23 and is in contact with it, and when flexible flat cable uses, the electromagnetic wave that each signal transmission line 211 is produced when transmission signal will be subjected to the shielding of metal shielding layer 23 and can outwards not propagate, and can be by outwards leading off, to reach the function of ground connection with being connected lead 213 and earth connection 212 of metal shielding layer 23 contact.

Moreover, 23 of this connection lead 213 and metal shielding layers further are provided with fixture, shown in the embodiment of Fig. 6, this fixture can be for pasting agent 251 (for example PUR), perhaps can be adhesive tape 252, shown in another embodiment of Fig. 7, also or can be anchor clamps (indicating among the figure), make this fixture that this connections lead 213 is fixed with metal shielding layer 23 certain contacts.

Technology contents of the present utility model and technical characterstic disclose as above, yet the personage who is familiar with this technology still may do various replacement and the modifications that do not deviate from this case utility model spirit based on announcement of the present utility model.Therefore, protection range of the present utility model should be not limited to those disclosed embodiments, and should comprise various do not deviate from replacement of the present utility model and modifications, and is contained by following claim.

Claims

1, a kind of ground structure of flexible flat cable improvement, this flexible flat cable mainly is provided with a conductor line layer, be provided with a plurality of signal transmission lines in this conductor line layer, and upper and lower two side surface of this conductor line layer are respectively equipped with insulating barrier, and this insulating barrier then is coated with the metal shielding layer outward; It is characterized in that:

Be provided with at least one earth connection in this conductor line layer, this earth connection is provided with at least one and is in contact with one another the lead that is connected of arrangement with it, and this connection lead turns down outwardly to this metal shielding layer and is in contact with it.

2, the ground structure of flexible flat cable improvement according to claim 1 is characterized in that, this earth connection be connected the upper and lower arrangement of lead.

3, the ground structure of flexible flat cable improvement according to claim 1 is characterized in that, further is provided with fixture between this connection lead and metal shielding layer.

4, as the ground structure improvement of flexible flat cable as described in the claim 3, it is characterized in that this fixture is anchor clamps.

5, as the ground structure improvement of flexible flat cable as described in the claim 3, it is characterized in that this fixture is for pasting agent or adhesive tape.

6, the ground structure of flexible flat cable improvement according to claim 1 is characterized in that, is provided with bonding coat between this conductor line layer and insulating barrier.

7, the ground structure of flexible flat cable improvement according to claim 1 is characterized in that, is provided with bonding coat between this insulating barrier and metal shielding layer.

8, as the ground structure improvement of flexible flat cable as described in claim 6 or 7, it is characterized in that this bonding coat is a PUR.

9, the ground structure of flexible flat cable improvement according to claim 1 is characterized in that this insulating barrier is a PETG.

10, the ground structure of flexible flat cable improvement according to claim 1 is characterized in that this metal shielding layer is an aluminium foil layer.