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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
financial decisions, should not be based on machine-translation output.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 and FIG. 2 are sectional views of a conventional
earphone, FIG. 3 is a sectional view showing an embodiment of the earphone of the present
invention, and FIG. 4 is a sectional view showing another embodiment FIGS. 5 and 6 show
frequency characteristic curves of the conventional earphone, and FIG. 7 shows frequency
characteristic curves of the earphone according to the present invention. -61 · · · · · · · · Case main
body, 32 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · diaphragm, 41 · · · · · · Plug part, 43 .....
sound path, 44 ..... sound absorbing material.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an earphone. The
conventional earphone has a yoke (2) in the case body (1) and a magnet (3), a drive coil (4) and a
diaphragm (5) as shown in FIG. Inside, in the drive coil (4),--child 4! Connect the lead pad (7)
through +61, and then attach the lead plug (7) to the above case: 【The body (1) is a magnetic
bug integrally provided with the ear plug part (9) having the sound path (8), Or, as shown in FIG.
2, as shown in FIG. 2, a case body (crystal l! 3 in the support 111) and a drive, a arm (1 spread
are provided, and this "feed 7-m (141 The center concave portion of the peristaltic plate (16)
supported by the peripheral edge portion of the case main body Uυ is brought into contact with
the tip needle portion α9 of the case, and the above crystal + 131 = IQ! The ear cover part CD
which has a sound path ■ inside is integrally connected to the Lee (2) I 1 1 線 line 119
connected through 鳴 α 秒 of the child cover a ビ bi J and the case main body 01). There is a
crystal type in which an earplug part CD having a crisp is integrally provided. However, the
frequency characteristics of the magnetic type earphone in Fang 1 are good in the low frequency
characteristics as shown in FIG. 5 but the high frequency is insufficient, and the frequency and
characteristics of the crystal type earphone in FIG. As shown in FIG. 6, the low zone is
insufficient, and it can not be said that Gaesong is a light-hearted pillar. In addition, both
earphones produce an outer peak that thickens at 1 KHz to 1.5 KHz, which is not preferable for
hearing. The unthinking attempts to improve these performances and provide high performance
earphones. Next, one embodiment of the present invention will be described with reference to
FIG. (3) 猾 2 J) 1, and fix the ceramic piezoelectric vibrator (至) to the inside of the case body I 3
υ via an elastic support such as 至, for example. The central portion of the conically-shaped film
diaphragm (2) is adhesively bonded to the central portion, and the outer peripheral portion of the
diaphragm (2) is adhesively fixed to the peripheral portion of the case main body). Also, fix the
relay terminal board (c) to the case main body 61), connect the relay terminal board (d) with the
piezoelectric vibrator and so on with a power 4 # (d), Take the lead wire OD from the) to the
outside. In addition, the 7 flanges 13 of C plug stopper 01) are integrally fixed to the peripheral
edge of the up-conversion case main body (3I) through the diaphragm-and the diaphragm (B)
inside the ear 11 A sound path (43), a sound absorbing material such as maltobrene is inserted
into this sound path (c), and an earplug section (4);-a town i 'receiving (from the 4th to the sound
path (c)) The two ends of the above-mentioned sound absorbing material are engaged and held
by the protruding portion (c).
This sound absorbing material (goods) suppresses the natural resonance of one roadman 3 and
plays a role of dust prevention, and when the sound path @ 3 is contaminated by dust etc., the
heat absorbing material-is extracted with tweezers etc. Clean the sound path (C) and replace the
sound absorbing material (2) with a new one to keep it clean. The frequency characteristics of
this real z14 example are shown by low line curve @ powder in the off view. Looking at this
broken curve (48), compared to the conventional magnetic earphones and crystal earphones,
both the low frequency characteristics and the high frequency characteristics are well-balancedly
improved in the piezoelectric vibrator type earphone of this embodiment. I understand that. In
this case, the sound absorbing material (b) is removed from the structure of this embodiment,
and the sound absorbing material-is shown in FIG. It can be seen that the peak-like part in the
frequency characteristic curve can be improved by providing the road (g). Also, as shown in FIG.
4, small holes 6 are formed in the case main body 6 so that the inside of the case main body OD
can be vented to the outside, as shown by solid curves in the frequency characteristics of FIG. , V
can be further harmed in the low region. The reason +-X, inside by the above film diaphragm (d)
and the case main body 6? Sealed seal (The internal pressure of the enclosed space is pressured
according to the amplitude of the film diaphragm (b)) to work to suppress the amplitude of the
film diaphragm (2) h · Case body G υ If the small hole 61) is provided in the case, the small hole
+511 communicates the space formed by the diaphragm (b) and the case 4 with the outside air,
and the inside air (6) Since the change in pressure is reduced and kept almost the same as the
external pressure, the movement of the film diaphragm () is extremely smooth, and the
reproduction capability is improved. When this solid curve fI3 is compared with the dashed curve
(C) without the small hole 15i1, about 4 dB at 500 Hz and about 6 ctB at 20 Hg are obtained. As
described above, according to the present invention, the piezoelectric vibration, the vibration
plate (b) by "I-1000", (the moving structure 4), and-the pji provided with the suction fd-.周 can be
improved by several dimensions 乞 greatly improve the Nii ability β · ·. The above-mentioned
sound absorption which has been pressed: r (44) makes it possible to prevent dust and dirt from
being attached to a diaphragm (b) or the like, and it is clean and can prevent the generation of
abnormal noise due to dust →. In addition, if the inside of the case-integral unit G is vented to the
outside, the frequency characteristic can be further improved (7).
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description, jps5746382
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