JPS60165898

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DESCRIPTION JPS60165898
[0001]
FIELD OF THE INVENTION The present invention relates to a coaxial spiller 71, in which the
speaker axes are identical in the multi-wax and is-beka. In general, the speaker separates the
sound waves of the opposite phase 71 j j before and after the diaphragm in the conventional
example S hood and the intermediate point. Bond to vignette. -4k, split the frequency band in
order to re-create sound with high fidelity-'y-drive full-speed drive-dedicated Sbino 7-Ispieker is
mainstream]]- (2, Sdereo FN To improve the localization of the sound image at the time of the
cows) Named on the same axis-on the same axis 12 to concentrate the sound source at one
location [7 coaxial type speakers; The following is a description of the conventional coaxial type
Subie-Canninode (see below). Fig. 1 idw does not show a cross-sectional view of the coaxial
speaker kneet. 1 is a high-pitched sound If1 Sbica unite, 2U1, 4 z 4 + f- "V-+ ii vibration U
shaking board 1 ij, edge, 4 7 L / -m, 6? −J, push / t, 61i, magnet, T °, − 8 [(71 ;; jrJ-j °-1 unit
knit, 9 is a ring-shaped flat diaphragm, 10a, 10b is End, 11: coupling + 12 U: DANNO, 13: voice
1-il, 14: outer peripheral ring, 15: plate, 16: magnet, 17: yoke, 18: inner peripheral frame, 19,
20.21 It is a screw. The above speaker unit is assembled as follows. First, the high sound speaker
unit 1 has the plate 6 and the yoke 7 bonded to the top and bottom of the magnet 6, the frame 4
fixed to the plate 6, and the voice coil with the edge 3 bonded to it Complete. On the other hand,
the low-pitched speaker unit 8 has the upper and lower plates 16. The yoke 17 is adhered, and
the outer peripheral frame 14 and the inner peripheral frame 18 are fixed to the plate 15 with a
twist 19.20, and then the voice coil 13. ダンパ１２． It is adhered to the outer peripheral frame
14 in a state where the three of the camp rings 11 are adhered, and finally, the ring-shaped flat
diaphragm 9 to which the edges 10a and 10b are adhered is placed on the coupling 11 and
adhered. The high-pitched speaker unit 1 thus produced is placed in the inner peripheral frame
18 of the low-pitched speaker unit 8, and the two are fixed by a screw 21 from the rear surface.
However, with the configuration as described above, since the bass speaker unit 8 and the high-
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pitched speaker, L = node 1 are fixed via the inner peripheral frame 18, there are very few parts
to dissipate heat.
Therefore, with such a configuration, the temperature rise of the voice coil portion of the hightone speaker unit 1 becomes severe, and finally the voice coil has a disadvantage of melting and
cutting. Further, in the above-described conventional configuration, the diameter of the central
pole portion of the yoke 17 becomes large, and the magnetic circuit is very heavy. Also, this yoke
17 is generally made by forging a bar material, but a cost amplifier is avoided because such a
large size requires a very large number of materials and requires a press with a large pressing
force. It also has no drawbacks. Further, when the speaker system as shown in FIG. 2 which is
smaller than the general speaker system as shown in FIG. 2 is formed by the coaxial speaker unit
1, the total height H of the speaker unit must be lowered. In order to reduce the total height H of
the above-mentioned conventional coaxial speaker unit, it is necessary to reduce the thickness of
the plate, magnet and yoke of each speaker unit. However, if the thickness of the magnet is
reduced, the permeance coefficient of the magnet will be small and low temperature
demagnetization will occur, so in practice it can not be made very thin. Therefore, the structure
shown in FIG. 1 has a problem that there is a limit in lowering the overall height. SUMMARY OF
THE INVENTION The present invention solves the above-mentioned conventional drawbacks, and
can improve the heat dissipation of a high sound speaker unit to realize high input resistance,
and can realize a thin speaker system with a low overall height. Intended to be provided. The
present invention relates to a magnetic circuit of a speaker unit for bass of a coaxial type speaker
unit, a yoke having an L-shaped yoke extending outward and a flange portion provided on an
inner peripheral portion, and a cup shape fixed to the flange portion of the yoke. An inner
peripheral frame, an outer peripheral frame in which a magnet and a plate are adhered to the
yoke and fixed to the plate, a ring-shaped flat diaphragm provided between the cup-shaped inner
peripheral and outer peripheral frames, and the cup-shaped inner peripheral frame The speaker
unit for high sound is provided in the above, and the heat generated from the speaker unit for
high sound can be dissipated from the cup-shaped inner circumferential frame to realize high
input resistance of the speaker unit for high sound. is there. DESCRIPTION OF THE PREFERRED
EMBODIMENT An embodiment of the present invention will be described with reference to FIGS.
3 and 4. FIG. 3 shows a cross-sectional view of the coaxial speaker unit in the embodiment of the
present invention, and FIG. 4 shows a perspective view of the cup-shaped inner circumferential
frame 18 constituting the present embodiment.
The component names in FIG. 3 are the same as those in the prior art shown in FIG. First, the
high sound speaker unit bonds the plate 6 and the yoke 7 to the upper and lower sides of the
magnet 6, fixes the frame 4 on the plate 7, inserts the voiced flat diaphragm 2 with the edge
bonded to it, and bonds. Next, in the bass speaker unit, the plates 16. The yoke 17 is adhered,
and the outer peripheral frame 14 and the cup-shaped inner peripheral frame 18 are fastened
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with screws 19.20, and the dampers 12. The voice coil to which the coupling cone 11 is bonded
is inserted into the field section and the damper 12 is bonded to the frame 14. Finally, the ringshaped flat diaphragm 9 to which the edges 1oa and 1ob have been bonded is attached to the
outer frame 14 at the edge 10b. The top of the coupling is adhered to the inner frame 18 at the
edge 10 a, and to the back surface of the ring-shaped flat diaphragm 9. The high-pitched speaker
unit 1 is placed in the cup-shaped inner circumferential frame 18 of the completed low-pitch
speaker unit 8 and fixed with the back screw 21 of the cup-shaped inner circumferential claim
18. According to this embodiment, the yoke of the low-pitch speaker unit is L-shaped in cross
section to the outside, and is formed into a shape with an inner peripheral flange, and the cupshaped inner peripheral frame 18 is attached to the hip Since the speaker unit 8 for high sound
and the speaker unit 1 for high sound can be fixed with one screw 21, there is a feature that
man-hours can be reduced. Further, the cup-shaped inner peripheral frame 18 is made of a
material having good thermal conductivity K, heat generated in the voice coil portion of the highsound speaker unit 1 is cup-shaped through the field portion and the cup-shaped inner
peripheral frame 18 It has a great feature of being able to be released to the air under the inner
circumference frame 18 and capable of achieving high input resistance of the high sound
speaker unit 1. Further, since the material of the center pole can be reduced by press forming the
yoke plate in the present embodiment, cost can be reduced. Further, in the present embodiment,
since the hole is provided at the center of the yoke 17 of the low frequency speaker unit 8, the
thickness of the high sound speaker unit 1 can be released into the hole, and the height of the
entire speaker unit It is possible to realize a thin, thin speaker system with a lower H than the
conventional speaker system shown in FIG. FIG. 6 shows the second embodiment of the present
invention. Description will be made with reference to FIG. FIG. 6 shows a cross-sectional view of a
coaxial speaker unit according to a second embodiment of the present invention, and FIG. 6
shows a perspective view of a cup-shaped inner circumferential frame 18 constituting the
present embodiment.
FIG. 6 is similar to the configuration of FIG. A space 22 is surrounded by the coupling cone 11,
the voice coil 13, the diaphragm 9, and the cup-shaped inner peripheral frame 18. The difference
from the configuration of FIG. 3 is that, as shown in FIG. 6, an opening 18a is provided around
the cup-shaped inner peripheral frame 18 and an opening 18b is provided at the bottom. The
operation of the coaxial speaker of the second embodiment configured as described above will be
described below. When the diaphragm 9 is driven by the voice coil 13 to move up and down, the
air in the space 22 flows in through the openings 18 & 18b of the cup-shaped inner peripheral
frame 18. The spill is done. As described above, according to the present embodiment, even if the
cup-shaped inner circumferential frame 18 is made of a material having poor heat conduction,
the air in the space 22 passes in and out through the spaces 18a and 18b. The heat generated
from the voice coil of the unit 1 can be dissipated from the surface of the field section, and the
high-pitched speaker unit can be made to be resistant to input. Hereinafter, FIG. 7 about 3rd
Example of this invention. Description will be made with reference to FIG. FIG. 7 shows a cross-
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sectional view of the coaxial speaker unit showing the present embodiment, and FIG. 8 shows a
perspective view of the cup-shaped inner circumferential frame 18 constituting the present
embodiment. FIG. 7 is similar to the configuration of FIG. What is different from FIG. 6 is that fins
18 c are provided around the cup-shaped inner peripheral frame 18 as shown in FIG. 8. The
coaxial speaker unit of the third embodiment configured as described above has the opening 18a
while the air in the space 22 is along the fins 18c as in the second embodiment. Repeat inflow
through 18b. As described above, ↓ J1 in the present embodiment, the air in the four spaces 22
is the same as in the second embodiment of it, and the open pan 1 N 8 a. 18)) When going in and
out of the stomach surface part , with the heat rising, fins 18 Ci'j −,,, f E>-> open IX-, 'l% Sj S
18 a, 18 b Air is generated by a fin or a high-pitched speaker element J-ant 1) two forces 1. If the
heat is dissipated efficiently, the speaker unit 1 for ',' @ 'and' i 'f can be C · ーーてきー C C C 化
化 1 1 1 1 1. In addition, the 2.3th example of Example 7 is obtained; L force, 2 square inner
circumferential ring 18 d, and the shell 1 with poor thermal conductivity are made of / with a
good H charge of / (-or thermalization · j) 1-21- also good-and d, not even blind one. Effect of the
Invention As described above, according to the present invention, the cross-sectional shape of the
present invention is outside (字形 = wide L-shaped-with two ridges on each inner periphery-in
place-I--) I, zo-shaped inner circumference: By providing a loop, the number of steps can be
reduced because two steps can be made by fixing the low-pitched subwoofer J-t and the highpitched speaker unit with a single screw.
Furthermore, according to the present invention, "by the shape of a three-dimensional shape,
Shih-fu-bo / Reno: $ s Ll; (decreased), vt two-t-y y): -1)" +, Φ phrase-reduced C9 U, in conflict-(:
Working 1. 1. tl-J う二, ーー-(-へや −1− −1− りり −1− −1− t t t t ストスト,,,, 1: 1
There are 3 C & 1 &, polka dots] -2 of the center i '(l I □, holes are :: j)' v)-'(1-for high-pitched,
baby 17 units! Thickness valley · Not-〆 1 (-baby 1) 1-7 to reduce the total height H-と-or (-, 杉
cedar, baby hippo · 'sboo), a) Lu ム 8- (-And -1 -1) have advantages 5, f h, cup-shaped inner circle!
· · · し i I 'i ic + part or cold convoy' fin k · set up (-and (ti two, [, 、, そ (1) open ri part go together
7 .. : Qi ((: 0 上 i 5 ": ノ状凌 L 凌凌イ) b) for high-blind flash 7- to 1, field sound 1; 10/3 [L [2
made, high g speaker l: 2-7) high resistance to humanity-h realization-sh c,? There are -C people,
Jc 7 M length 411.
[0002]
Brief description of the drawings
[0003]
Fig. 1 · 1 j) Front view of the conventional 1t) 11Jf '-baby crab I · 7) Fig. 2 is the same I!
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I11 No. 1-Sbi-h ': thin Sveican using I-' 71-, X, arm 1], perspective view, 31 st / l kl, Bong)? Fig. 4
is a sectional view showing a first embodiment of the first embodiment of the first embodiment
of the first embodiment of the first embodiment of the first embodiment of the first embodiment
of the first embodiment of the present invention. In the first embodiment of J. · in the cup-shaped
inner circumferential surface 1- A [parent diagram, 5th ini Ji, the second embodiment of the
present invention, the second embodiment of the present invention, the coaxial speaker 1 Nitto
FIG. 6 is a perspective view of a Kag-shaped inner circumferential surface of a second
embodiment of the invention 4- FIG. Sectional view of the coaxial speaker 9 'at 9 + 1,), Fig. 8?
FIG. 11 is a perspective view of a third embodiment (j: i-shaped inner circumference) of a first
embodiment of the present invention. 1 ..... treble Subi - Kako, knit, 2 - - Bo Hitoshi Sukoiru with a
vibration plate, 5,15 ... Gushito, 6.16 ...... Magne, 1 -, 7.17 .... yaw, is, 14 ··· peripheral frame, 8 ......
woofer v -, = y l, 9 ······ ring flat diaphragm, 1B ... Inner frame, 18 a, 18 b..., Open 1 part, 18 C
no, fn. Name of agent On deputy Toshi Nakao 1 or 1 person Figure 1 Figure 2 Figure 3 Figure 4
@ 5 Figure 6 b
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