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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing an example of
one main body of a four-channel headphone according to the present invention, and FIG. 2 is a
cross-sectional view along lines A and A thereof. 1 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 2nd sound hole, 17
· · · · 1st high-tone unit, 18 · · · ... 2nd high tone unit 1 ・. -5- Japanese Utility Model Application
No. 49-66403 (2) -6-
[Detailed Description of the Invention] This invention is a so-called 4-channel headphone which
divides signals of 4-channels on the left front, left back, right front and right back and converts
them into sound. The headphones are particularly small in size by comparing with the speaker
box etc.-"-1 fi + extremely small size, so the band characteristic is particularly bad. Moreover, it is
normal for the book to have a bad four-bass characteristic from this point, since the bass is
somewhat leaked through the ear cushion of the headphone. It should face the left and right ears
in a 4-channel headphone. Due to the need to accommodate the electro-acoustic conversion units
of the left and right headphone units r, it is necessary to use a smaller unit than the unit, and the
use space also becomes smaller, so that the bass characteristic is further deteriorated. +. The
object of the present invention is to provide a nineteen-channel headphone which is excellent in
bass characteristic and high in frequency, ie, excellent in frequency characteristic. In this device,
a partition is provided in the headphone case, and both 11: the second electro-acoustic
transducer unit 5 are opposed to each other, and each sound between them is in the front-back
direction in the opposite to the ear of the case Vc 111 to lead to both ends of the! (2) The
acoustic room is constructed one by one, and the bass is resonated in the acoustic room and the
strong vibration occurs. Furthermore, the first and second sounds! Attenuation compensation and
high for busy highs. First, to emphasize the selection. Electroacoustics for the second treble :.
Connect the conversion unit. Next, with reference to the drawings, an example of the 4-channel
headphone according to this invention will be taken off. Left to be attached to both sides of the
headband in the figure. Only one of the right headphone body is shown. In the figure, l indicates
a headphone case, and case 1 is made of a substantially cocoon-shaped synthetic tree N molded
article. The 1 ° partition wall 3 is formed so as to divide the inside of the case 1 into
approximately two in the front and back by combining the plate portion 2 on the side opposite to
the ear of the case 1 and the opposite portion to this. A front chamber 4 and a rear chamber j15
are formed in the case 1 from the partition wall 3VC. A first electroacoustic transducer unit 6 and
a second electroacoustic transducer unit 7 are disposed to face the partition wall 3 in the front
chamber 4 and the rear chamber 5, respectively. The thickness of the partition 113 is am, and
gradually increases as it approaches 52, and only the first four facing the partition wall 3 become
large. Second item 6! It is possible to incline the partition wall 3 so that the distance between the
partition wall 7 and the partition wall 7 is also larger than the plate portion 21C. Each sound
from the first unit 6 and the second unit 7 is emitted to the outside from the front and rear end
portions of the opposing portion to the layer 1 ear.
Because of this, it hangs on the plate part 2 side! Long holes 8 and 9 extended in the upper and
lower direction in the plate portion 2 are opened opposite to the gap between the first airt 6 and
the second unit 7 and the partition 3 respectively. In addition, an opposing plate 10 with the ear
substantially parallel to the plate portion 2 is provided in proximity. A protrusion 11 in contact
with the plate portion 2 is formed integrally with the partition wall 3 so as to face the partition
wall 3 and the space between the plate portion 2 and the opposite plate 10 is divided into two in
the front and rear direction. In the peripheral portion lO- of the opposing plate 10, the distance
between the peripheral portion lO- and the plate portion 2 is much larger n, and between the
peripheral IllOa and the central portion. A ring-shaped tip 1 ') lltOb is formed. The first lattice 1
in the form of a lattice at the inclined portion 10b in both the longitudinal direction l1IllI. The
second sound emission holes 13.14 are opened one by one. Therefore, each sound from the @ 11
second unit 6.7 passes through the long hole 9 and passes between the plate portion 2
and the opposing plate 10 to the weir 15 within the reflection, The sound is discharged from the
filling holes 13 and 14 to the outside. These two-way W & each form the first and second
acoustoelectric circuits 15 and ts, respectively including the spaces between the unit 6.7 and the
unit @ 3. 1st. Inside the second sound emission hole 13.14 and Ya □ (Bleeding Town and each
close to the first high-pitched electroacoustic conversion □. A unit 17 and a second highsounding electro-acoustic transducer 18 are attached. That is, the first one. It is integrally formed
so that the opposing plate lOk circle 1119 ° 20 may be passed close to the second sound
release holes 13 and 14, and these circles. Each of f 1119.20 is penetrated by the plate portion
241. The l'l E1 second high-pitched sound 17 ° 18 is inserted and held in the inside 19 20
respectively. It is slightly drawn into the sound emitting surface of the first and second highpitched units 17 and 18 from the peripheral portion 10 m of the opposing plate 10. Plate portion
2 and opposing plate, The first one between the ten. No. 23-leek) The sound from 6.7 reaches the
sound release hole along one side of the circle * 19.20. A ring-shaped ridge 21 is integrally
formed on the counter plate 10 in the middle of the first and second 2 high-pitched ones) 17.18.
And good separation of the back and forth tone can be achieved. A ring-shaped ear cushion 22 is
brazed to one side 10a of the opposing plate 10 in a removable manner. According to the above
description, the low frequency band 41 is resonated at the second acoustic chamber 15116 at 41
out of the sound from the 11th second exhaust 6 嘗 7 to be Ijlm M and reach the sound release
holes 13 and 114. . Therefore, it is possible to compensate for the leakage of two or more basses
of the ear tassy, and also to extend the scrap wave penetration characteristics to the bass side.
Thus the sound from Yuetsu) 6.7 is a figurative filn passage f @ I 璽 15.1!
The noise may be attenuated because it is damped, or the stuttering may be emitted by the I11
112 112 enit 17.18 for the loud noise, sufficiently compensating for the above attenuation, and
stretching the noisy region at nine frequencies q # Become. Yue Takane in history) By the use of
17 第 18 1st 1, E2-& T) @, 70 & +. As a whole, the broadband characteristics can be obtained
easily without having to count the amount. 訃 諷 1, 1! Like the example above. When making 2
pieces of goods 6, 7 and gap 113 and O kan ll & incline respectively, it is possible to make 5
drops of the # feces of min for the roar from these aet. By the way, when the box of 6.7 and the
box 413 is at a right angle! L crystal knot 6. The roar of the fly, in particular the roar,
reciprocates between the airt 6.7 and the gap 113 to the sound release hole 13.14 to increase
the attenuation. 614. , Ko, wa ,: 11g1! According to the Ia 01 01 proposal, a cross 11k showing
one example of one main body of the 4-channel heddophone according to the Ia 01 01 plan, a 菖
2 figure is a cross-sectional view taken along the line AA. 1: headphone case 3: bulkhead 4: front
type 5S: rear type 6: 6: @ 1- = y to 7: 7: 2-a to y: 13: first sound emission hole 14: to 2 Sound
emission hole, 17: 1 IIA for dimorphs, 1811 E2 for A & toes. 0Practical model registration
applicant Sugaden @ manufacturing stock gold ceremonial hall person grass car 520
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