CN203026770U - Bending resistant LVDS (low voltage differential signaling) wire - Google Patents

Abstract

The utility model provides a bending resistant LVDS (low voltage differential signaling) wire. The wire comprises a flat FFC (flexible flat cable) and a metal shell, wherein the flat FFC comprises an upper insulating coating, flat copper wires and a lower insulating coating; the flat copper wires are arranged in parallel; the upper and lower surfaces of the flat copper wires are respectively fit with the upper insulating coating and the lower insulating coating; the two ends of the flat copper wires are fit with reinforcement plates and are exposed outside; the two ends of the flat FFC are stamped; a stamping structure at one end of the flat FFC is matched with a plate end connector while a stamping structure at the other end of the flat FFC is matched with a plate end base; the structure of the metal shell is matched with the plate end base; and the metal shell is installed at the end, at which the stamping structure is matched with the plate end base, of the flat FFC. The wire has the advantages of low cost, high production efficiency, long bending life, controllable characteristic impedance, accordance with the halogen-free requirement, good shielding performance and the like.

Description

A kind of LVDS line of anti-bending

Technical field

The utility model relates to the holding wire technical field, relates in particular to a kind of LVDS(Low Voltage Differential Signaling that is applied to notebook computer, Low Voltage Differential Signal) line.

Background technology

Disclosing on the market at present three kinds of LVDS lines, is respectively FPC (but soft printed circuit board (PCB)), MIRCO COAXIAL CABLE(extremely thin coaxial wire MCC) and ELECTRONIC WIRE(electric wire) be widely used in the electric signal transmission of the electronic products such as notebook computer, LCD, LED.

The production process of existing ELECTRONIC WIRE LVDS line is: fit, cut, Hot bar, some glue beat end, slotting glue shell, mainly there is following shortcoming in this traditional structure:

1, cost is high: heart yearn is strands, and the materials processing cost is high, and the copper material that expends is many; Need to beat end, insert glue shell etc., complex process, cost of labor is high;

2, production efficiency is low: complex procedures, manual operation efficiency is low.

Summary of the invention

The purpose of this utility model is to provide a kind of LVDS line of anti-bending, reduces the existing operations such as end, slotting glue shell of beating, and reducing copper material expends, and reduces production costs and cost of labor;

Another purpose of the present utility model is to provide a kind of LVDS line of anti-bending, simplifies working process, and improves manual operation efficiency.

The purpose of this utility model is achieved through the following technical solutions:

A kind of LVDS line of anti-bending comprises flat FFC and metal-back;

Described flat FFC comprises upper strata insulating coating, flat copper wire, lower floor's insulating coating and stiffening plate; Described flat copper wire is discharged side by side, and its upper and lower surface fits with upper strata insulating coating, lower floor's insulating coating respectively, and two ends lamination reinforcement plate, outside its two ends flat copper wire is exposed to; The two ends punch die of described flat FFC, wherein the punch die structure of an end and plate terminal adapter are complementary, and the punch die structure of the other end and plate end stand are complementary;

Described metal-back, its structure and plate end stand are suitable, are installed on the punch die structure of flat FFC and the end that plate end stand is complementary.

Wherein, described metal-back comprises metal upper shell and metal lower shell; One end of described metal upper shell and metal lower shell is fixedly connected, the other end is provided with corresponding buckle and draw-in groove, and leaves the space of passing through for circular copper wire between metal upper shell and metal lower shell; Described circular copper wire exposes its exposed end after passing described space; The side of described metal upper shell and metal lower shell also is provided with the place of leaving a blank;

One end of metal-back is being installed, and described flat FFC upper trimming die has protruding end and female end, and protruding end is suitable with the place of leaving a blank, after buckle, draw-in groove fasten and female end suitable.

Wherein, the outer surface of described flat FFC posts characteristic impedance and controls material.

Wherein, the flat FFC that described outer surface posts characteristic impedance control material is divided into several, and the folding posterior cord of all itemizes is integral.

Wherein, described all itemizes are after bundle is integral, and its outside also is enclosed with EMI masking material and insulating material, and described EMI masking material is specially conductive fabric or acetic acid cloth.

Wherein, also leave between described wrapped itemize and rotate the space.

Wherein, described upper strata insulating coating and lower floor's insulating coating are the PET material.

Compared with prior art, the utility model embodiment has following beneficial effect:

1, has the Costco Wholesale advantage: need not to beat separately terminal, insert the glue head, expend copper material few; Operation is simple, and cost of labor is low.

2, production efficiency is high: simplified flow chart, production capacity significantly promotes.

3, flex life is long: because flat FFC is also folded parcel strip shape by itemize, thereby not only can smoothly it be filled in undersized tubular space, and leave running clearance between itemize, be convenient to bending, by waving number of times more than 30000 times, without short breaking phenomena, conductor resistance rate of change＜3%.

4, characteristic impedance is controlled: in existing LVDS line, to be prone to lay not of uniform size for circular copper wire, causes the factors such as circular copper wire is loose in the course of processing and the influencing characterisitic resistance value, and normal condition can only reach 100 ± 20 Ω; And LVDS line of the present utility model is parallel lines structure, rely on the surface to stick on the special suction ripple of one deck material (being that material is controlled in characteristic impedance), reach the purpose of control characteristic impedance, its control range is accurate, stable, reach 100 ± 10 Ω, further guarantee the stability of signal transmission;

5, screening performance is good: adopt double layer material control characteristic impedance and EMI, screening performance is splendid.

6, can meet Halogen-free requirement: existing LVDS line adopts the insulating barrier of PVC material, can't reach Halogen, and in the utility model, the insulating barrier of flat FFC adopts the PET material, not only can reach RoHS, and can reach Halogen.

Description of drawings

Fig. 1 is the schematic diagram of the manufacturing procedure part one of LVDS line in the utility model embodiment.

Fig. 2 is the schematic diagram of the manufacturing procedure part two of LVDS line in the utility model embodiment.

Embodiment

The utility model is based on a kind of innovation of ELECTRONIC WIRE LVDS line, a kind of novel LVDS line of FFC that is applied to the notebook computer signal transmission, hereinafter to be referred as FFC-NB LVDS line (FLEXIBLE FLAT CABLE-NOTE BOOK LOW VOLTAGE DIFFERENTIAL SIGNALING).

In the utility model, the main feature of FFC-NB LVDS line is: 1. wire rod: heart yearn adopts flat copper wire; 2. structure: adopt flat FFC combination metal-back structure; 3. itemize formula manufacturing process: with flat FFC itemize parcel, can replace the cabling of original LVDS line, simplification of flowsheet, bend resistance performance and antijamming capability are stronger, and be more stable than electric wire technique; 4. insulating material: use PET insulation material, not only can reach RoHS, also can reach Halogen, realize environmental protection.

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.

In the present embodiment, FFC-NB LVDS line is comprised of flat FFC1 and metal-back 2.

See also Fig. 1, flat FFC1 is fit together by flat copper wire 11, upper strata insulating coating 12, lower floor's insulating coating 14 and stiffening plate 13 and forms.The two ends of flat copper wire 11 are exposed, as the golden finger end of conducting, are this product and the contacted position of connector, play transmission and conducting; Upper strata insulating coating 12 plays the insulating protection effect; Stiffening plate 13 plays and strengthens terminal position intensity, convenient effect of pegging graft; Lower floor's insulating coating 14 plays the insulating protection effect.The two ends punch die of flat FFC1, wherein an end punching has protruding end 15 and female end 16, and is suitable with metal-back 2, plays the effect with metal-back 2 screens; The effect that coincide with the card connector coupling is played in the corner 17 of other end punch trimming.

Metal-back 2 is comprised of metal upper shell and metal lower shell, plays the effect of connecting plate end stand.As shown in Figure 1, an end of metal upper shell and metal lower shell is fixedly connected with, and the edge is provided with folding position 21, is convenient to pressing down and opening of metal-back; Metal lower shell is provided with draw-in groove 22, and buckle 23 is corresponding, plays the effect of fixing flat FFC, prevents from coming off; Metal upper shell is provided with buckle 23, and draw-in groove 22 is corresponding, plays the effect of fixing flat FFC, prevents from coming off; Salient point 24 on metal-back 2 is used for the contact-connection assembly for electric female seat, forms tight screens with connector, prevents from coming off.Leave between metal upper shell and metal lower shell and be space 25, be used for allowing flat copper wire pass through, expose flat copper wire 11, flat copper wire 11 plays transmission and conducting.

See also Fig. 2, in the present embodiment, be mounted to the corresponding ports of flat FFC1 at metal-back 2 after, with flat FFC1 itemize, bunch, processing.Wherein 18 and 19 positions of exposing for itemize, be rugosity, needs outer subsides characteristic impedance to control material before itemize, plays the effect of control characteristic impedance.After itemize, flat FFC1 also posts EMI masking material and insulating material in the outside, and conductive fabric 3 as shown in Figure 2 and insulating tape 4, conductive fabric 3 are used for shielding EMI to be disturbed, and insulating tape 4 is used for insulation.

The applying step of above-mentioned FFC-NB LVDS line comprises:

The first step: flat copper wire 11 and upper strata insulating coating 12, lower floor's insulating coating 14 of PET material are fitted, and corresponding ports position lamination reinforcement plate 13 exposes the two ends golden finger position, makes flat FFC1.

Second step: with the two ends punch die of flat FFC1, make it to be complementary with connector, at the end of flat FFC1, metal-back 2 is installed.

The 3rd step: flat FFC1 is pasted characteristic impedance outward control material, play the effect of control characteristic impedance.

The 4th step: with part itemize and the bunch that flat FFC1 needs cabling, bending, namely wrap up in the growth bar shaped with insulating material.In the present embodiment, the position that itemize exposes is rugosity as shown in number in the figure 18 and 19.

The 5th step: paste the EMI masking material according to technical indicator in the external overall of flat FFC1, the local insulating tape 4 that pastes, insulating tape 4 mainly plays the protective actions such as wear-resisting, fixing.The EMI masking material comprises conductive fabric 3, acetic acid cloth etc., disturbs in order to shield EMI.

The 6th step: with mainboard and Display connector in FFC-NB LVDS connection, realize connecting, complete the transmission of electric current or electric signal.

The above is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.

Claims (7)

1. the LVDS line of an anti-bending, is characterized in that, this LVDS line comprises flat FFC and metal-back;

Described flat FFC comprises upper strata insulating coating, flat copper wire, lower floor's insulating coating; Described flat copper wire is discharged side by side, and its upper and lower surface fits with upper strata insulating coating, lower floor's insulating coating respectively, and two ends lamination reinforcement plate, outside its two ends flat copper wire is exposed to; The two ends punch die of described flat FFC, wherein the punch die structure of an end and plate terminal adapter are complementary, and the punch die structure of the other end and plate end stand are complementary;

Described metal-back, its structure and plate end stand are suitable, are installed on the punch die structure of flat FFC and the end that plate end stand is complementary.

2. the LVDS line of anti-bending as claimed in claim 1, is characterized in that, described metal-back comprises metal upper shell and metal lower shell; One end of described metal upper shell and metal lower shell is fixedly connected, the other end is provided with corresponding buckle and draw-in groove, and leaves the space of passing through for circular copper wire between metal upper shell and metal lower shell; Described circular copper wire exposes its exposed end after passing described space; The side of described metal upper shell and metal lower shell also is provided with the place of leaving a blank;

One end of metal-back is being installed, and described flat FFC upper trimming die has protruding end and female end, and protruding end is suitable with the place of leaving a blank, after buckle, draw-in groove fasten and female end suitable.

3. the LVDS line of anti-bending as claimed in claim 1 or 2, is characterized in that, the outer surface of described flat FFC posts characteristic impedance and controls material.

4. the LVDS line of anti-bending as claimed in claim 3, is characterized in that, the flat FFC that described outer surface posts characteristic impedance control material is divided into several, and the folding posterior cord of all itemizes is integral.

5. the LVDS line of anti-bending as claimed in claim 4, is characterized in that, described all itemizes are after bundle is integral, and its outside also is enclosed with EMI masking material and insulating material, and described EMI masking material is specially conductive fabric or acetic acid cloth.

6. the LVDS line of anti-bending as claimed in claim 5, is characterized in that, also leaves between described wrapped itemize and rotate the space.

7. the LVDS line of anti-bending as claimed in claim 1, is characterized in that, described upper strata insulating coating and lower floor's insulating coating are the PET material.

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