CN2545680Y

CN2545680Y - Flat foil audio transmission electric cable

Info

Publication number: CN2545680Y
Application number: CN 02221816
Authority: CN
Inventors: 凌君彦
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-03-11
Filing date: 2002-03-11
Publication date: 2003-04-16
Anticipated expiration: 2012-03-11

Abstract

A flat audio transmission cable is characterized in that the structure of a rectangle cable sectional drawing is the positive and the negative poles 2 of two electrical conductors, which are communicated and fixed together in the middle; the negative poles 1 of two electrical conductors have an upper part and a lower part. Insulating medium 3 is arranged between the negative pole 1 and the positive pole 2. An outer layer is a fixed layer 4. The structure of the sectional drawing of a round cable is the positive and negative poles 2 of two electrical conductors, which are communicated and fixed together. The negative pole 1 of two electrical conductors has an upper part and a lower part. The insulating medium 3 is arranged between the negative pole 1 and the positive pole 2. The outer layer is two fixed layers 4. A metallic shield layer 5 is arranged between two fixed layers.

Description

Flat foil formula audio transmission cable

Technical field

The utility model relates to a kind of electronic equipment, particularly a kind of flat foil formula audio transmission cable that is specifically designed to signal transmission between the stereo set.

Background technology

Signal transmission stube cable is generally the circular cross-section conductor that the multiply thin copper wire is twisted into and is coated with insulating material and forms between the stereo set.Loss when transmitting for reducing signal, people often pass through to improve the purity of conductor material or strengthen the sectional area of electric conducting material so that the resistance of unit length is the smaller the better.But because the frequency range of audio signal is 10～20000HZ, as considering high order harmonic component composition, the then high-end 100000HZ that reaches.And the high more signal of frequency is tending towards surface transmission in conductor, and the density of signal code is also big more, Here it is usually said " kelvin effect " or " skin effect " (SKIN effect).Further research finds that also the conductivity of conductor is big more to be that resistivity is more little, and this kelvin effect is also obvious more, so even the conductance fine silver also higher than copper, as long as surface area is enough not big, kelvin effect is more very.The existence of this effect can produce adverse influence to the normal transmission of audio signal, because high-frequency current only flows on surface of conductors, the low-frequency current resistance value can increase relatively, thereby whole audio signal medium-high frequency component and high order harmonic component are seriously lost, its direct result is that sound reproduction is caused damage, show as tone color dimness, thin, details is unintelligible and fuzzy.The signal of different frequency meeting generation time phase shift in cable in addition causes the phase distortion of signal.

For avoiding and reduce collective's skin effect, people's enlarged diameter that conductor is total is increasing surface area or silver plating process to be carried out on the copper conductor surface handle or the like, but effect is not fairly obvious, and cost also can increase.Therefore, the geometry of change conductor is a way.By simple calculating as can be known, in the long-pending and equal length, square conductor is bigger than round conductor surface area in same cross-sectional, and minimum all is 1.128 times (squares), and square conductor is flat more, and relative surface area is just big more, can be tending towards infinitely great in theory.When the flat copper width is 15mm, when thickness was 0.05mm, the ratio that is the round copper conductor surface area per unit length of 0.49mm with the long-pending radius of same cross-sectional was 10 times for example! That is to say that the flat conductive surface is surperficial bigger about 10 times than round conductor by the ability of high-frequency current at this moment.This is very favourable to improving kelvin effect undoubtedly.The existing several companies in the whole world have released the flat conductor audio transmission cable of different structure at present, and representative is the Goertz Sound cable.In fact, the Goertz Sound cable is one of citation form of flat foil formula cable, and its weak point is: (1) two paper tinsel band is undertaken the both positive and negative polarity of signal, though surface area increases, but also suffer the interference and the intrusion of external electromagnetic clutter easily, cause the deterioration of signal transmission quality.(2) theoretic physical index of this simple structure and transmission characteristic make moderate progress, but may not be exactly a kind of optimum structure, especially aspect the expressive force of playback music, also do not reach gratifying degree.

Summary of the invention

The purpose of this utility model is to disclose to the public a kind ofly can prevent the external electromagnetic noise jamming, and signal transmission characteristics is good, and DC internal resistance is extremely low, and big current transient characteristic is good, has more the flat foil formula audio transmission cable of distinct advantages than Goertz structure.

The utility model is to adopt following technical scheme to realize:

The structure of rectangle cable sectional drawing of the present utility model is that negative anodal 2 of two pairs of conductors are fixed together at intermediate connection, and there is dielectric 3 on the negative pole of two pairs of conductors both sides about in the of 1 between conductor negative pole 1 and the conductor positive pole 2, and skin is a fixed bed 4.

The structure of round cable sectional drawing of the present utility model is that negative anodal 2 of two pairs of conductors are fixed together at intermediate connection, the negative pole of two pairs of conductors both sides about in the of 1, between conductor negative pole 1 and the conductor positive pole 2 dielectric 3 is arranged, skin is two-layer fixed bed 4, and metal screen layer 5 is arranged between the two-layer fixed bed.

Advantage of the present utility model is:

(1) because the utility model has metal screen layer 5, the ability of anti-external electromagnetic noise jamming is good, has guaranteed signal transmission quality.

(2) surface area will be twice when the paillon foil width is identical, more helps bringing into play the advantage that strap improves signal transmission characteristics.

(3) DC internal resistance is lower, the loss of signal still less, big current transient characteristic is better.The Sandwich structure can be used for the signal-transmitting cable of little electric current, also can be used for the audio amplifier of big electric current and the stube cable between the power amplifier.

Below in conjunction with description of drawings and embodiment the utility model is done further introduction.

Fig. 1 is existing abroad Goertz voice-frequency cable tangent plane structural representation;

Fig. 2 is the utility model audio tweeter stube cable tangent plane structural representation;

Fig. 3 is the utility model audio signal stube cable tangent plane structural representation.

Wherein: 1, negative pole; 2, positive pole; 3, dielectric; 4, polyethylene (PE) or polyvinyl chloride (PVC) fixed bed; 5, metal screen layer.

Embodiment

As shown in Figure 2, cable is 0.1mm by four layer thicknesses, and wide is that 20mm oxygen-free copper (OFC) paper tinsel is formed.Two outside layers is the effect that negative pole has screen concurrently, is attempted by the common that inputs or outputs of stereo set usually.Fitting together after middle two-layer copper foil surface is zinc-plated, it is anodal to form.This isolates both positive and negative polarity with the insulation of polypropylene or polyethylene dielectric, and outermost is then in addition fixed-type with Teflon or PVC material.

Structure is seen shown in Figure 3, and wherein metal forming is OFC or the Ag of 0.05 * 1.8mm.The conductor outside coats polyethylene (PE) as insulating barrier, is fixed with PVC again, and the outside is the metallic shield net that braiding forms, and outermost is again one deck PVC.This structure has equaled dual electromagnetic shielding, and transmission is of great benefit to for small-signal.The whole outside diameter of cable is 6～8mm.

Adopt the subjective in actual use sense of hearing of voice-frequency cable of Sandwich structure to show as the glossy and brightness of high pitch but can be not ear-piercing, details be various simultaneously.The solid cohesion of middle pitch, svelteness.Low-frequency range sound is then quick strong, and is dynamically clearly demarcated, amount sense balance and control is very good.Especially the expressive force of music is very satisfactory, and this point is obviously good than Goertz structural cable.Therefore in the reasonably combined system of sound appliances, adopt this wire rod can improve the quality that voice signal is reset undoubtedly greatly.

Claims

1, a kind ofly can prevent the external electromagnetic noise jamming, signal transmission characteristics is good, DC internal resistance is extremely low, the big good flat foil formula of current transient characteristic audio transmission cable, it is characterized in that: the structure of rectangle cable sectional drawing is that negative anodal 2 of two pairs of conductors are fixed together at intermediate connection, there is dielectric 3 on the negative pole of two pairs of conductors both sides about in the of 1 between conductor negative pole 1 and the conductor positive pole 2, and skin is a fixed bed 4.

2, flat foil formula audio transmission cable according to claim 1, it is characterized in that: the structure of round cable sectional drawing is that negative anodal 2 of two pairs of conductors are fixed together at intermediate connection, the negative pole of two pairs of conductors both sides about in the of 1, between conductor negative pole 1 and the conductor positive pole 2 dielectric 3 is arranged, skin is two-layer fixed bed 4, and metal screen layer 5 is arranged between the two-layer fixed bed.