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DESCRIPTION JPS52124236

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DESCRIPTION JPS52124236
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a high impedance
type headphone according to an embodiment of the present invention, and FIG. 2 is an enlarged
view of a main part in FIG. 11 · · · · · 1 plug, 12 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Magnetic body, 16 .....
Coating.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high impedance
type headphone having a long efficiency and long characteristic by incorporating an innoidance
conversion transformer in a portion corresponding to a cord. High impedance type headphones
such as headphones / condensed headphones can not be used by connecting them to @ at the
same time as general amplifiers, and impedance conversion 9IIRt-must be intervened between
the amplifier and QI'M]. No. In general, an adapter for impedance conversion is separately
prepared, and it is used by interposing it with an amplifier, or it is inconvenient to handle in
common with a common headphone, and the headphone itself V in Vida / It has been considered
that a speaker conversion transformer is provided, and it is possible to use a no-e-ivance type
headphone just by plugging in a plug. As this headphone, for example, there is a headphone
provided with a transformer on the plug side of the cord, or a headphone provided on the
headphone main body. However, in the case of providing a transformer on the plug side, the cord
between the secondary side of this transformer and the headphone / is larger than 、, and the
code content is too large to ignore as compared with the children of the headphone part. There is
a disadvantage that the area inertia is deteriorated and the like. In addition, since the code
portion on which the converted pressure signal travels is long as described above, the insulation
process is also difficult. In addition, in the case where the transformer ft is provided in the main
headphone, the headphone itself becomes heavy, and the feeling of use for a long time becomes
painful, and the feeling of use is reduced, which is a favor to the 3-1'1. This device has educated
such a drawback, using flexible magnetic material to construct the whole cord part as a
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transformer for impedance conversion, and it is efficient and has good range characteristics, and
the headphone itself is lightweight and comfortable to use. It is an object of the present invention
to provide an impedance type headphone which can be held. An embodiment of the present
invention will be described below with reference to the drawings. As shown in FIG. 1 and FIG. 2,
the primary coil 12 is connected to the plug 11 and the secondary coil 14 is provided by
connecting @@ 10,000 heads and body 13 @, and this primary coil 12 and the secondary The
coils 14 are coupled by a flexible magnetic body 16 such as a piano wire, for example. That is,
the primary coil 12 and the secondary coil 14 are electromagnetically coupled to both ends of
the flexible magnetic rod JJID, and the entire portion corresponding to the code VC is configured
as a transformer for impedance conversion. Each of the coils 12.14 and the magnetic body 15 is
mechanically strongly bonded to each other, and the whole is covered with an insulating
covering 16 and is also sleeved in an iM manner.
vl,-The high impedance type headphone configured in this way is configured as a transformer for
impedance conversion including the portion corresponding to the cord including the flexible
magnetic body 15, and the portion corresponding to the cord is mostly magnetic The body 15 is
configured to be provided with primary and secondary coils 12114 at both ends thereof.
Therefore, the output of the second-order pile 12, that is, the signal whose impedance has been
converted, is directly led to the headphone interface 13, and the internal capacity of the so-called
cord becomes a negligible value, and the efficiency is reduced or reduced as in the prior art. It
becomes a headphone with a good note without causing deterioration of the durability. As
described above, since there is no code portion on which the signal after the impedance
conversion can be placed, the insulation measures can be facilitated. Furthermore, since the
impedance conversion transformer t is configured to be dispersed throughout the entire portion
corresponding to the cord, the headphone body 13 itself does not become one, and it can be used
comfortably with a child. In other words, even though the headphone body 13 is an @ amount as
described above, if the voltage is positive as A, the h1 efficiency is good and the high frequency
characteristic is good under the same conditions as those provided with the impedance
conversion transformer in the headphone body 13 It becomes a bearded form of radhon. This
Noi impedance type headphone can be used by connecting the plug 11 directly to a common
amplifier, and when used selectively with a common headphone, the adapter is not necessary and
it is very easy to use. Become. The headphones may be stereo or monaural, and the number of
coils and flexible magnetic materials may be extended according to the type. As described above,
according to this consideration, a primary coil and a secondary coil are provided at both ends of
a portion corresponding to a cord, and a transformer for impedance conversion is configured by
coupling between them with a flexible magnetic material, and a headphone main body It is
possible to provide a lightweight, efficient and stable negative impedance type headphone.
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