JPH01307399

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DESCRIPTION JPH01307399
[0001]
The present invention relates to a cartridge for a record player. In particular, the present
invention relates to a high purity copper wire used for winding of a coil portion. 1 ri 勿災 rice 致
亙 record players, usually via a cartridge the vibration of the record needle, such as a diamond,
instead of the electrical signal, and converts the signal to sound, is intended to convey the sound
to the human ear. In particular, copper thin wires have been used for the coil portion of the
cartridge, but recently, large copper thin wires called LC-OFC with extremely low crystal grains of
oxygen have been used for the windings. This LC-OFG copper dissolves and removes oxygen in
ordinary 4 N (99, 99% copper) in a reducing atmosphere, and after drawing and annealing to
coarsen the crystal grains, it obtains crystal wires by obtaining fine lines. However, long crystal
grains are obtained in the length direction of the line. This product gave a higher acoustic effect
than previous 4N copper only windings. However, the present inventors have found a cartridge
for a record player having a better sound effect than this. The present invention relates to a
cartridge for a record player characterized by using a thin wire made of copper of 6 N or more as
a copper winding of a coil portion for the cartridge to obtain an extremely high acoustic effect.
"Civil 31" is also a civilization--winding of the coil portion of the cartridge for a record player
used in the present invention is made of copper having a grade of 6 N (99, 9999%) or higher.
Cartridges for record players include MM, IM and MC types. The coil portion of the cartridge for
a record player is, for example, one obtained by winding a 10 to 35 μm φ thin copper wire 8 to
50 times around a 1 to 5 m square iron core. The length of the copper thin wire used for this is
about 8 to 160. It has been found that the acoustic effect is extremely high by using the abovementioned high purity copper for a portion of such a length. This was a very surprising effect.
That is, the effect is as follows. ■ The rise of the sound is extremely high. (■ Produces a sound
with a very high afterglow. (2) The band indicating the range of vibration is wide, ie, the range of
reproducible sound is extremely wide. ■ Provide extremely high gloss to women's songs. The
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above acoustic effects are superior to conventional LC-OFCs and the like, and are a surprising
difference among those skilled in the art. (Wow, it has been found that the component itself
produces extremely high performance because it is good rather than giving heat treatment etc.,
so the goodness of long-term open sound continues, and from that point it is also a conventional
product In comparison, it shows extremely high characteristics.
Example A coil portion of an MC-type cartridge for a record player was manufactured by winding
a thin wire (30 μmφ) of 6N copper 30 times (length 14 aa) L on a 2 mm square iron core. The
coil portion is placed in a magnetic field, and functions to generate power by vibrating the coil
with a needle tip. The above was installed for a record player, and when I heard the sound, it
produced an extremely high sound. It was very surprising that a very good sound was produced
compared to the conventional product only by using a thin wire of 6 N copper of 14 cm 30 μm
in length. In particular, the rise of the sound was fast, there was an afterglow, the band was wide,
and the voice of 0 sentences was glossy. Comparative Example Under the same conditions as
above, the sound was heard through the line consisting of LC-OFC, but it was not preferable
compared to the 6N copper of the example, and it was confirmed that the above-mentioned
product of 6N copper is obviously good did.
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