JPH0271411A - Copper wire wound around head core part - Google Patents

Abstract

PURPOSE:To reproduce tones close to those of original sounds with little distortion in all areas from a low tone to a high tone by making one whose wire diameter is 15-30mum phi out of high-purity copper whose purity is >=99.9996%. CONSTITUTION:The copper wire used as a high conductor has impurity elements such as Fe, S, Ni, Mn, O and N as noise sources which spoil fidelity from an acoustic point of view when the sounds are reproduced, they are in the crystal of the copper as substitutional or interstitial solid solution, thus, the crystal is distorted by the difference of atomic diameters from a micro point of view and becomes the noise sources, therefore, the fine wire whose wire diameter is 15-30mum phi is made out of the high-purity copper whose purity is >=99.9996% and it is the wire to be wound around a head core part. Thus, the tones close to those of the original sounds can be reproduced with little distortion in all the areas from the low tone to the high tone.

Description

[Detailed description of the invention] field of invention The present invention relates to a copper wire wound around a head core.

- "W's" L-bo technology Acoustic head cores have cores for recording, playback, and erasing purposes, but depending on the design philosophy of each manufacturer, there are various types, such as those that are independent of each other and those that share recording and playback functions. . However, the technical principle is the same; for example, in the case of recording, an audio signal is converted into an electrical signal, and a high-J core made of permalloy, soft ferrite, sendust, etc. is used as a head core.
A frequency current is applied in the form of a frequency current to a copper wire wound in large numbers on a core made of magnetic core material, and an alternating magnetic field with a corresponding strength and weakness is formed inside the winding, thereby causing the core, which is the magnetic core material, to become magnetized. This creates a violently alternating magnetic flux inside the core. This magnetic flux exits through a narrow cut (groove) at the tip of the core and is continuously magnetized and recorded on a magnetic tape, which is a recording medium. Reproduction works in exactly the opposite way, by faithfully converting the magnetic signal on the magnetic tape through the head core into an electric signal (frequency current) within the core's windings, and then converting it back into an audio signal. It is.

On the other hand, demagnetization simply involves dispersing the directions of the magnetic domains in a magnetically recorded tape using a high-frequency alternating magnetic field and eliminating the magnetization on the magnetic tape, so acoustic fidelity is not important.

Therefore, although we will mainly talk about recording and playback here, one of the important things in improving acoustic performance is how to keep the electric signal (frequency current) that mediates between the audio signal and the magnetic signal faithful to the original sound. And I wonder if I can reproduce it again. In other words, alternating frequency currents occur inside the copper wire wound around the core, which is where the signal is converted, due to defects in the metallographic structure inside the copper wire, resulting in noise sources such as capacitive reactance, phase shift, and This is why it is important to minimize current attenuation, etc. By the way, conventionally,
The copper wire used for this purpose is tough pitch copper, 99.99%
There were various types of copper wires, such as oxygen-free copper of a certain degree, copper wire using it as a starting point for casting by unidirectional solidification, or coarsening of crystal grains through heat treatment after casting. However, the idea of pursuing faithful reproduction of the original sound was insufficient.

IFlIL The present inventors made the following invention as a result of intensive study.

That is, the present invention provides a copper wire wound around the head core, which is made of high-purity copper with a purity of 99.9996% or more and has a diameter of 15 to 30 μmφ, and a copper wire with a purity of -9.9.
The present invention relates to a copper wire wound around a head core portion, which is a thin wire made of high purity copper of 996% or more and has a number of windings of 20 times or more and less than 1,000 times.

1-・Explanation To the spatula 1 for electromagnetic conversion・15~:30μ mouth 1φ for the core
Some use 0.3 to 25 m of copper m-wire,
In this state, it is required to flow the frequency current smoothly with as little damage as possible. Copper wire used as a high-voltage conductor is considered to be a noise source that impairs the fidelity during sound reproduction from an acoustic point of view. Fe, S, Ni, and M
There are impurity elements such as n, ○, and N. These elements simply exist as a solid solution in the copper crystal in the form of substitution or interstitial formation, and the crystal is distorted from a microscopic point of view due to the difference in atomic radius, which can be a source of noise. Furthermore, when a plurality of these impurities form oxides or other compounds and precipitate in the crystal or at the grain boundaries, it becomes an even bigger noise source.

Next, the countless dislocation groups generated during plastic working tend to be stuck around impurities, which also becomes a large noise source.

Based on the above, from the copper currently used in the world, 10
Fine wire is made from high-purity steel of 99.9996% or more, which has more than double the purity, and is used as the wire to be wound around the head and core. More preferably, it is 99.9999% or more. As a result, we were able to confirm through comparative listening tests that the sound quality was overwhelmingly superior to any copper material currently in use.

KO11suυIL Using high-purity copper with a purity of 99.99995% as a raw material, an ultra-fine wire with a wire diameter of 20 μmφ was made, and after the surface was insulated, it was used as a copper wire to be wound around the acoustic head core shown in Figure 1. . The total winding length used for recording, playback, and erasing was approximately 1611+. The sound was extremely faithful to the original sound and had a three-dimensional feel.

Effects of the Invention (1) The acoustic performance is such that it is possible to reproduce a tone that is faithful to the original sound with little distortion in the entire range from bass to treble.

(2) The impressions of the listeners were as follows. The sense of depth and three-dimensionality was perfectly reproduced, and in particular, the detailed sound expression was skillfully captured, surpassing conventional products.

[Brief explanation of the drawing]

FIG. 1 shows the appearance of the acoustic head core. FIG. 2 shows the internal structure of FIG. 1. Patent Appearance Nippon Mining Co., Ltd.

Claims (2)

[Claims] (1) A copper wire wound around the head core portion, which is made of high-purity copper with a purity of 99.9996% or more and has a wire diameter of 15 to 30 μmφ. (2) A copper wire wound around the head/core portion, which is a fine wire made of high-purity copper with a purity of 99.9996% or more, and the number of windings is 20 or more and less than 1,000 times.