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JP2001285992

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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
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DESCRIPTION JP2001285992
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the
structure of a speaker device having an oval or elliptical sound outlet.
[0002]
2. Description of the Related Art In video equipment such as a television receiver and information
processing equipment such as a computer, by arranging a speaker for audio output on the side of
a display for video output, video and audio can be obtained. In order to enhance the sense of
unity, in this case, in order to reduce the width of the entire device as much as possible, a small
vertical speaker with a small width is employed.
[0003]
FIG. 5 shows a cross-sectional structure in the width direction of such a longitudinal speaker.
The speaker has an oblong sound outlet (10 '), and a megaphone-like cone paper (2) is provided
inside the megaphone-like frame (9), and the proximal end of the frame (9) A reciprocating drive
mechanism consisting of a yoke (4), a magnet (5), a pole piece (6) and a voice coil (7) is attached
to the section, and the outer peripheral surface of the voice coil (7) The proximal ends are linked.
The open end of the cone paper (2) is attached to the cone-to-paper attaching step (92) (92)
formed at the open end of the frame (9). Furthermore, between the voice coil (7) and the frame
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(9), there is interposed a corrugated plate-like damper (30) having a plurality of elliptically
extending corrugations.
[0004]
As shown in FIGS. 6 (a) and 6 (b), at the base end of the frame (9), a damper attaching step (91)
for attaching the outer peripheral part of the damper (30) is formed in an elliptical ring shape. At
the same time, at the open end of the frame (9), a cone-to-paper attaching step (92) for attaching
the open end of the cone paper (2) is formed in an oval ring shape.
[0005]
In the loudspeaker shown in FIG. 5, the cone paper (2) is driven to reciprocate by supplying a
current according to the input signal to the voice coil (7), and the damper (30) causes vibration
of the cone paper (2). A damper effect is applied, and a sound corresponding to the input signal
is emitted from the sound emission port (10 ').
[0006]
By the way, in the above-mentioned speaker, in order to obtain high sound quality, it is necessary
to adopt a damper (30) which exhibits a large amplitude and a sufficient compliance.
For this purpose, it is effective to form the damper (30) with the largest possible outer diameter
to form as many corrugations as possible.
[0007]
However, in the longitudinal speakers shown in FIGS. 5 and 6, since there is a restriction on the
width W, the restriction on the width B '(short axis diameter of the outer peripheral edge) of the
damper (30) is also generated. Can not form many corrugations.
Therefore, there is a limit to the improvement of the sound quality in the conventional vertical
loudspeaker.
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[0008]
Therefore, as shown in FIGS. 7 (a) and 7 (b), the side walls of the frame (9) are pressed from the
outside toward the inside with a punch (80) to cut and raise the cone paper A structure in which
the hook portions (93) and (93) protrude inward can be considered. According to the frame
structure, since the cone paper sticking and raising part (93) protrudes to the inside of the frame
(9), it is possible to enlarge the distance between both side walls of the frame (9), whereby The
elliptical shape of the damper attachment step (91) can be made large in diameter of the short
axis. As a result, the damper (30) can be formed into a large elliptical shape having a short axis
diameter B ', whereby the sound quality can be improved.
[0009]
However, in the frame structure shown in FIGS. 7 (a) and 7 (b), in the step of forming the cut-andraised part (93) in the frame (9), it is formed by punching only with the punch (80). The flatness
of the cut-and-raised part (93) is low, and the cone paper can not be stuck in contact with it.
Therefore, the cut-and-raised part (93) is further pressed (fixed pressing) to form a flat surface
Post processing to raise the degree is necessary. As a result, there is a problem that man-hours
increase and cost increases. Also, since large through holes (94) (94) are opened on both sides of
the frame (9), the strength of the frame (9) is reduced, for example, transportation from the
frame manufacturing process to the speaker assembly process There is a possibility that the
frame (9) may be deformed by applying an external force to the inside.
[0010]
SUMMARY OF THE INVENTION It is an object of the present invention to improve the sound
quality of a speaker device having an oval or elliptical sound emission port, and to reduce the
number of steps of the frame manufacturing process, yet the strength of the frame To provide a
new structure that can maintain high
[0011]
In the loudspeaker apparatus according to the present invention, a megaphone-shaped corn
paper (2) is disposed inside a megaphone-shaped frame (1), and the proximal end of the corn
paper (2) is A damper (3) intervenes between the frame (1) and the output of the reciprocating
drive mechanism, which is connected to the reciprocating output of the reciprocating drive
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mechanism attached to the base end of the frame (1).
On the frame (1), on both sides in the minor axis direction of the sound emission port (10), a
cone paper affixing bending portion (12) (12) formed by bending the end of the frame (1) inward
is formed A plurality of through holes (13) and (13) are opened along each of the corn paper
affixing bending portions (12), and the open end of the corn paper (2) is formed on both of the
corn paper affixing portions (12) and It is pasted.
[0012]
In the above speaker device of the present invention, since the cone paper bonding bent portion
(12) protrudes to the inside of the frame (1), it is possible to expand the distance between both
side walls of the frame (1). The shape of the damper attaching step portion (11) can be made
large in shaft diameter. As a result, a damper with a large shaft diameter can be used, and in the
case of the elliptical damper (3) in particular, the short shaft diameter B can be increased,
whereby the sound quality can be improved.
[0013]
Also, in the manufacturing process of the frame (1), the corn paper affixing bending portion (12)
and the through holes (13) (13) are simultaneously processed by pressing using a pair of punch
(8) and die (83). It can be formed. Here, the corn paper affixing bending portion (12) can be
formed by bending the end of the frame (1), and since punching is not necessary, for example,
the punch (8) can be a corn paper affixing bending portion The first punch portion for bending
and forming (12) and the second punch portion for punching and forming the through holes (13)
(13) can be provided side by side. Then, both sides of the corn paper affixing bending portion
(12) can be pressed by the first punch portion and the second punch portion of the punch (8),
and simultaneously press forming can be performed to increase the flatness thereof. It is.
[0014]
Furthermore, in the frame (1), instead of the conventional large through holes (94), a plurality of
small through holes (13) (13) are opened and formed between the through holes (13) (13) Since
the bridge portion to be used exhibits a function as a support, the structural strength of the
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frame (1) is higher than that of the conventional frame (9). The through holes (13) and (13) of
the frame (1) facilitate the flow of air accompanying the vibration of the cone paper (2) and play
a role of permitting free vibration of the cone paper (2).
[0015]
Specifically, the damper (3) has an oval or elliptical outer peripheral edge and a circular inner
peripheral edge, and the short axis direction of the outer peripheral edge coincides with the short
axis direction of the sound outlet (10) And the outer periphery of the damper (3) is attached to
the damper attaching step (11) formed on the frame (1), and the inner periphery of the damper
(3) is a reciprocation drive mechanism It is connected to the output unit. Also, the cone paper (2)
has an oval or elliptical open end, and is disposed with the short axis direction of the open end
aligned with the short axis direction of the sound outlet (10), The open end is attached to a corn
paper affixing fold (12) formed at the open end of the frame (1).
[0016]
According to the speaker device of the present invention, the sound quality can be improved, the
number of steps of the frame manufacturing process can be reduced, and the frame strength can
be maintained high. .
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be
specifically described below with reference to the drawings.
FIG. 1 shows a cross-sectional structure in the width direction of the loudspeaker according to
the present invention. The speaker has an oblong sound outlet (10), and a megaphone-like cone
paper (2) is disposed inside the megaphone-like frame (1), and the proximal end of the frame (1)
A reciprocating drive mechanism consisting of a yoke (4), a magnet (5), a pole piece (6) and a
voice coil (7) is attached to the base of the cone paper (2) on the outer peripheral surface of the
voice coil (7). The ends are connected. The opening of the voice coil (7) is covered by a dustproof
(71). A ring-shaped gasket (21) is attached to the opening edge of the frame (1). The open end of
the cone paper (2) is attached to the open end of the frame (1). Furthermore, between the voice
coil (7) and the frame (1), there is interposed a corrugated plate-like damper (3) having a
plurality of elliptically extending corrugations.
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[0018]
As shown in FIGS. 2 (a) and 2 (b), at the base end of the frame (1), a damper attaching step (11)
for attaching the outer peripheral part of the damper (3) is formed in an elliptical ring shape. At
the same time, at the open end of the frame (1), a corn paper affixing bending portion (12) (12) is
formed to affix the open end of the cone paper (2). Further, in the frame (1), as shown in FIG. 3
(b), two through holes (13) and (13) are opened along each of the corn paper affixing bending
portions (12).
[0019]
3 (a) (b) and FIGS. 4 (a) to 4 (d) are formed by pressing a frame (1) to form a corn paper affixing
bending portion (12) and a through hole (13) (13). It represents a process. Before press working,
as shown in FIG. 3A, protruding pieces (14) and (14) are formed on both side walls in the width
direction of the frame (1). Also, in the punch (8) used for press processing, the two punched
punch portions (81) (81) for punching and forming the two through holes (13) (13) and the
projecting pieces (14) at right angles. A bending punch portion (82) for bending and forming is
provided in a protruding manner.
[0020]
On the other hand, as shown in FIG. 4 (a), the die (83) used for press processing is formed with a
recess (84) into which each punching punch (81) of the punch (8) is to be inserted. With the
punch (8) and the die (83) disposed on both sides of the side wall of the frame (1) as shown in
FIG. 4 (a), the punch (8) is advanced toward the die (83) (FIG. 3 (a) )reference). As a result, as
shown in FIGS. 4 (b) and 4 (c), the projecting piece (14) of the frame (1) is pressed by the
bending punch portion (82) of the punch (8) and is gradually bent. Also, the side wall of the
frame (1) is punched out by the punching punch (81). Then, when the punch (8) is further
advanced, the projecting piece (14) of the frame (1) is bent at a right angle as shown in FIG. 4 (d)
to form a cone portion 12 It will be. In this process, the corn paper affixing bending portion (12)
of the frame (1) is clamped by the punching punch portion (81) and the bending punch portion
(82) of the punch (8), and the bending punch portion (82) It is finished with high flatness by
receiving press processing (fixed pressing processing).
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[0021]
As a result, as shown in FIG. 3 (b), the cone paper affixing bent portions (12) and (12) with high
flatness are formed on both side walls of the frame (1), and Along the two holes (13) (13) will be
opened. Thereafter, as shown in FIG. 1, the yoke (4), the magnet (5), the pole piece (6), the voice
coil (7) and the dustproof (71) are assembled to the frame (1). The outer peripheral portion of
the damper (3) is attached to the damper attaching step (11) of 1), and the inner peripheral edge
of the damper (3) is connected to the outer peripheral surface of the voice coil (7). Then, connect
the proximal end of the corn paper (2) to the outer peripheral surface of the voice coil (7) and
paste the open end of the corn paper (2) to the corn paper affixing bending portion (12) of the
frame (1) Furthermore, a gasket (21) is attached to the corn paper affixing bending portion (12).
This completes the assembly of the loudspeaker according to the present invention.
[0022]
In the speaker of the present invention, as shown in FIG. 1 and FIG. 2, since the cone-paper
affixing bending portions (12) and (12) of the frame (1) protrude inside the frame (1) It is
possible to maximize the distance between both side walls in the range of the full width W of the
speaker, whereby the elliptical shape of the damper attachment step (11) can be made to have a
large minor axis diameter. As a result, the damper (3) can be formed into a large elliptical shape
with a short axis diameter B, and the sound quality of the speaker can be significantly improved.
In the above embodiment, the damper (3) has an elliptical shape, but even in the case of a
circular shape, the shaft diameter of the damper can be made large, and the same effect can be
obtained. Further, as the damper (3), in addition to the corrugated plate, a cloud-shaped one is
also applicable.
[0023]
Further, in the manufacturing process of the frame (1), the through holes (13) and (13) are
opened by pressing using a pair of punches (8) and dies (83), and at the same time 12) can be
formed with high flatness. Accordingly, it is not necessary to apply a post-treatment as in the
prior art to the corn paper affixing bending portion (12), thereby reducing the number of manhours.
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[0024]
Furthermore, in the frame (1), two small through holes (13) (13) are opened instead of the
conventional large through holes (94), and between the two through holes (13) (13) Since the
bridge portion formed functions as a support, the structural strength of the frame (1) is higher
than that of the conventional frame. Therefore, even when an external force is applied to the
frame (1) during transportation from the frame manufacturing process to the speaker assembling
process, there is no possibility that the frame (1) is easily deformed.
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