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JPH02177698

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DESCRIPTION JPH02177698
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the
improvement of a speaker consisting of a towter and a woofer which is mounted at a place where
there is a risk of splashing water, such as a ship. 2. Description of the Related Art A conventional
speaker consisting of a speaker and a woofer is generally mounted so that the front faces of the
both face in the same direction. Also, as a special case, there is a speaker called cross axial where
the woofer and tow shaft crosses for mounting on the rear tray of a car, but in any case, the
diaphragm of the woofer and tow wheel can be seen from the front It is facing in the direction.
Then, when the horn is in the form of a horn, the horn projects to the front by the required
length. [Problems to be Solved by the Invention] In the conventional speaker of this type, since
the tow hitter is also directed to the front, during the navigation of the ship, the splashes of the
wave splash or the water splash during the washing may be the diaphragm of the tow hitter. ,
Water may splash on voice coil etc. Particularly in the case of seawater, there is a high risk of
corrosion of these, which causes problems in the reliability of the diaphragm and the voice coil.
In addition, when the horn has a horn shape, the depth of the speaker is increased depending on
the length of the horn, which is disadvantageous in mounting. SUMMARY OF THE INVENTION
The present invention is to solve the above-mentioned problems of the conventional loudspeaker
of this type, and the depth of the loudspeaker does not increase even if the horn is in the form of
a towter, and seawater or flush with the towiter An object of the present invention is to provide a
speaker without the risk of splashing with time. SUMMARY OF THE INVENTION The present
invention relates to a speaker means for achieving the above-mentioned object, in which a grille
mounted on the front of a woofer is fitted with a tow so as to face the woofer; And a horn shape.
BRIEF DESCRIPTION OF THE DRAWINGS An embodiment of the invention will now be described
with reference to the drawings, in which: FIG. In FIG. 1, 1 is a yoke, 2 is a magnet, 3 is a plate,
and these form a magnetic circuit of the woofer A, and the magnetic gap formed between the
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yoke 1 and the plate 3 is a diaphragm 4 The attached voice coil 5 is inserted. The outer
periphery of the diaphragm 4 is bonded to the frame 6 attached to the plate 3. When a signal
current flows through the voice coil 5, the diaphragm 4 vibrates by the driving force generated
between the voice coil 5 and the magnetic flux. As shown in FIG. 2, the frame 6 is provided with
the attachment portion 7a of the tow-B, and the attachment portion 7a is supported by a plurality
of arms 7b and a sound hole 7C for dissipating the sound of the woofer A is formed. The
provided grille 7 is attached with a screw 6a.
On the outer periphery of the grille 7, an inner wall 7d and an outer wall 7e are erected on the
frame 6 side, and as shown in FIGS. 3 and 4, the woofer A and the tow iter B are interposed
between the inner wall 7d and the outer wall 7e. A choke coil 8 and a capacitor 9 that constitute
a dividing network that divides the holding frequency of the signal are accommodated. And
between the flame ¦ frame 6 and the outer wall 7e, the drainage port 10 for discharging ¦
emitting the water which infiltrated into the space comprised by the flame ¦ frame 6, the inner
wall 7d, and the outer wall 7e is formed. Instead of the drainage port 10, any drainage means
such as drilling holes in the outer wall 7e may be used. The magnetic circuit of the tow-B is
formed by the yoke 11, the magnet 12, and the plate 13. The voice coil 15 of the diaphragm 14
is inserted into the magnetic gap, and the diaphragm 14 vibrates by the signal current flowing in
the voice coil 15. This tow-roller B is attached to a mounting plate 16 whose plate 13 is in the
shape of one side of the horn, and the mounting plate 16 is attached to the mounting portion 7 a
of the grill 7 with a screw 17. A boss 16a is erected at the central portion of the mounting plate
16, and the mounting plate 16 is inserted into a recess 18a of a support plate 18 having the
other shape of one side of the horn, and fixed by screws 19. Therefore, the space between the
mounting plate 16 and the support plate 18 is a horn-shaped space, and the sound dissipated
from the sound hole 16 b on the front surface of the diaphragm 14 drilled in the mounting plate
16 passes through the horn-shaped space. , And is dissipated to the front of the grille 7 from
between the arms b. Then, the periphery of the sound hole 16b of the mounting plate 16 is
raised to form a raised portion 16c, and a gap is formed between the raised portion 16c and the
support plate 18. Thus, in this speaker, the sound wave emitted from the sound wave 7c to the
woofer and the sound wave emitted from the space between the towter B and the arm 7b
through the horn-shaped space are emitted forward of the grille 7 It is. And since the tow hitter-B
is installed in the direction opposite to the woofer A, even if the splash comes from the front of
the grille 7, it does not directly hit the diaphragm 14 or the voice coil 15. In addition, even if the
droplets from the front surface enter the horn-shaped space, since the periphery of the sound
hole 16b on the front surface of the diaphragm 14 of the tow-B is a raised portion 16c, the sound
enters the sound hole 16b. Therefore, it does not flow down from between the support plate 18
and the mounting plate 16, and the diaphragm 14 and the voice coil 15 will not get wet.
Furthermore, since the choke coil 8 and the capacitor 9 that constitute the dividing network are
accommodated in the space formed by the inner wall 7d of the grille 7, the outer wall 7e and the
frame 6, it is necessary to separately install the space to accommodate them. It disappears.
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And while being able to prevent that these are splashed, even if this space is flooded, since it is
drained from the drainage port 10, the damage is prevented beforehand. According to the
present invention, since the horn of the weir placed opposite to the woofer is formed between the
woofer and the weir so as to open at the front as in the case of the weir, the weir and the woofer
The space between is used as a horn. Therefore, as in the prior art, the depth of the speaker is
not increased by the length of the horn, and the degree of freedom of the installation location is
increased. In addition, since the tow hitter faces the woofer and is installed backward, it is
possible to prevent corrosion from directly splashing seawater or the like from the front with the
diaphragm and the like, thereby preventing its corrosion, so durability is reduced. This can be
used as a marine speaker.
[0002]
Brief description of the drawings
[0003]
1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is a front
view thereof, FIG. 3 is a transverse sectional view, and FIG. 4 is a sectional view taken along line
I-1 of FIG.
A: woofer, B: towita-6: frame, 7: grille, 7a: mounting portion, 7b: arm, 7c: sound hole, 16:
mounting portion , 16a: boss, 16b: sound hole, 18: support plate, 18a: recess, 19: screw. Patent
applicant Pioneer Corporation e Figure 1
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