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JPS574880

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Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JPS574880
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a conventional
closed type electrodynamic earphone, and FIG. 2 is a cross-sectional view showing a conventional
open air earphone. FIG. 3 is a longitudinal sectional view showing an embodiment in which the
present invention is applied to a dynamic type earphone, and FIGS. 4 and 5 show a state in which
the earphone of the present invention is housed and mounted in the hollow portion of the pinna.
It is a partial front view and a partially broken side view. 20 и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и
ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии
и и 25 и и и и и и и и и и и и и и и и и voice coil, 28 и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и иииииии
Depressions. Figure 3 Figure 4
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ultra-compact
and light-weight earphone aiming for a sense of usability and wearability. For example, an
electrodynamic earphone (generally referred to as a dynamic earphone) of a closed account type
system is generally used for music appreciation and the like. 1) and so-called open air type
earphones 2 are known. By the way, in the former dynamic type earphone 1, the iron piece 6 is
disposed at the coil 1 constituting the magnetic circuit @ 3, the front 1- of the yoke 5 and the
gg0 portion, and the iron piece 6 is vibrated. A nylon tube 9 is attached to a projecting portion 8
having a vent 7 formed at a further front portion of the iron piece 6 and inserted into the inside
of the listener's ear canal (external hearing). According to this type of earphone, since the hynel
tube 9 must be inserted deep inside the external ear canal, it has a feeling of pressure and it is
easy to sweat. Further, since the earphone 1 is supported by the hinge 79 so as not to be
detached from the earlobe, the iron piece 6 as the vibrating portion is located at a location far
from the tympanic membrane, so that a good hi-fi sound can not be obtained. there were. In the
latter airborne earphone 2, the imaging plate 10 is a Heus coil 11, a yoke 12, and a magnet. It is
the earphone of the method of making it move in the form of wave movement within ? 13 and
? ? ? rate 14 etc. within 1g @@ 15, but this kind of earphone 2 is also formed in the front part
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of diaphragm 10 as in the above-mentioned earphone 1 Since the mounting portion 18 made of
urethane or the like is inserted into the inside of the ear canal of the listener by using the
protruding portion 17 having the pores 16 for use, there is a disadvantage that a feeling of
pressure inevitably occurs. The present invention has been proposed in view of such
conventional drawbacks. Hereinafter, an embodiment of the present invention will be described
with reference to the drawings. FIG. 3 is a longitudinal sectional view showing an embodiment in
which the present invention is applied to a tainami sok type earphone, and the fourth factor and
FIG. 5 are main parts showing a state in which the earphone of the present invention is
accommodated in the hollow portion of the pinna. It is a front view and a partially broken side
view. As shown in FIG. 3, the earphone 20 of the present invention is composed of an
electroacoustic transducer 23 composed of a vibrating part 21 and a magnetic circuit 22, and a
canopy 24 containing this transducer 23. The vibrating portion 21 includes a vibrating plate 25
having a sufficiently large effective area to contribute to a good sound, a Heuss coil 26 wound
around the outer periphery of the annular portion of the vibrating plate 25, and the vibrating
plate 25 correctly. It consists of an enon 27 for supporting in position.
The magnetic circuit 23-2 is an annular magnet 28 made of, for example, a rare earth cobaltbased magnet having excellent magnetic performance such as samarium cobalt magnet, and the
magnetic flux generated from this magnet is guided to a magnetic gap and a magnetic pole is
formed. It comprises the yoke 29 to be made to Furthermore, the cabinet 24 is a housing for
incorporating the components of the vibration unit 21 and the magnetic circuit 22 and other
components, and an annular flange 30 is formed on the front outer periphery of the cabinet 24
so as to protrude outward. It is done. The flange portion 30 is located at the entrance of the
external auditory canal (external auditory canal) 31 as shown in the fifth factor, and a cabinet is
provided in the hollow portion 33 located at the central portion of the shell-like auricle 32
surrounding the external ear canal 31. 24 is a portion that abuts on a cartilage projection 33a
formed at a predetermined position on the outer peripheral portion of the recessed portion 33 so
that the earphone 20 is not removed carelessly after being stored. The outer diameter 11 of the
flange 30 is, for example, about 18 G1. An annular bent portion 34 is formed on the outer
peripheral portion of the stiffening flange portion 30, and the above-described edge 27 is
supported on the inner side 4-of the bent portion 34 and disposed at the front portion of the
diaphragm 25. A ring 36 for supporting the outer peripheral portion 35a of the protector 35 is
fixed. The protector 35 has a number of vents 37.37. ... are formed. The front surface of the
protector 35 may be coated with an acoustically permeable material such as urethane. In this
embodiment, the thickness I-2 of the bent portion 34 formed in the flange portion 30 is formed
to be about 1.5'iUI +, and the recessed portion 33 of the auricle 32 is stored It is like that. A
terminal plate 39 connected to one end of the coat 38 is integrally fixed to the back surface of
the cabinet 24 by a molded portion 40 of synthetic resin or the like. A through hole 42 is formed
in the central portion of the terminal plate 39, the mold portion 40, the hole 41, the magnet 28,
and the yoke 29, and the back surface of the cabinet 24 in the cabinet 24 is open to space. It is
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designed to give you a unique, good blow quality. In the flange portion 30, a large number of
vent holes 30a, ... are formed along the outer periphery of the cabinet 24. Next, the method of
use of the present invention will be described together with its effects. The earphone 20 of the
present invention is housed in the recess 33 of the pinna 32 with the protector 35 side facing the
ear canal 31 of the pinnae 32, as shown in FIG.
Since the earphone 20 of the present invention is a small and lightweight earphone not using the
samarium 1, cobalt magnet or the like as the magnet 28, it can be easily stored in the recess 33
of the auricle 32. Further, since the earphone 20 of the present invention is arranged to be
accommodated at the entrance of the ear canal 31 of the auricle 32, the distance between the
diaphragm 25 and the tympanic membrane can be made close, so the samarium cobalt described
above The combination of using a magnet or the like as the magnet 28 and forming the effective
area of the diaphragm 25 sufficiently large makes it possible to expand the sound range and
obtain high-quality sound. Furthermore, according to the earphone 20 of the present invention,
only a part of the earphone 20 such as the outer peripheral portion of the protector 35 is in
contact with the auricle 32, so it withstands the use of the earphone for a long time without
sweating or receiving a pressure sensation. It is possible to eliminate the situation such as
inability. As is apparent from the above description, the present invention is configured to be
compact and lightweight and can be housed in the hollow portion of the pinna, so that it can be
worn well and can be used for a long time, as well as the diaphragm Since the distance of the
eardrum from can be made sufficiently close, it is possible to hear a sufficiently high fidelity
sound. In the present invention, since the flange portion is provided on the outer periphery of the
front of the crest, it is possible to prevent the detachment of the earphone from the auricle
carelessly. In the above-described embodiment, the present invention is applied to a so-called
guinaminok-type earphone (it is described here or can be applied to, for example, an open-ear
earphone or the like). Brief Description of Sections 7 to 4 FIG. 1 is a cross-sectional view showing
a conventional closed type electrodynamic earphone, and FIG. 2 is a cross-sectional view showing
a conventional open-air type earphone. FIG. 3 is a longitudinal sectional view showing an
embodiment in which the present invention is applied to a small-sized earphone, and FIGS. 4 and
5 are diagrams showing a state in which the earphone of the present invention is housed and
mounted in the hollow portion of the pinna. It is a partial front view and a partially broken side
view. 20 иииииииииии Earphones ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии Electro-acoustic conversion
unit 24 иии ....... Part 32 иии и и и Auricle 33 и и и и и и и и и и и Depressions. 8- 1st lens 15th, -4 (-1-3, / '/ 8th
2nd / 2nd 8th, / 1777 ,,' 76th 5488QV3 third 3-41 'r. 28) J j7., -40 g, 371231-2-5: 21 ? 27 22
22 fourth II one '^-Z.
33 on the '' '' ?7 ?7 ? 48 4 830 fifth mfi '' '' =-table 20-to the mouth 42-30-? 31 \ '7' / '& I 33
utility model registration person inc. Patent attorney Koike Minoru 4880% 6 Other than the
above inventor's address Minato-ku, Tokyo Konan 1-chome 7th-4th Nony Co., Ltd. Noni Co., Ltd.
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Shibaura Factory Name in Yoshida Yokoyama private seal 7
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