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JP2000175291

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Notice
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.
DESCRIPTION JP2000175291
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker used in various audio equipment.
[0002]
2. Description of the Related Art In recent years, video speakers are attached to both sides of
display modules such as cathode ray tubes, plasma displays, liquid crystal displays and the like.
Although it has been used, it is required to further narrow the width of the speaker as the width
of the display module is increased, and to improve the sound quality of the audio corresponding
to the high image quality of the screen.
[0003]
Here, a conventional speaker will be described with reference to FIGS. 5 (a) and 5 (b) and FIGS. 6
and 7. FIG.
[0004]
FIG. 5 (a) is a perspective view in which the voice coil and the voice coil integrated with the
diaphragm, which is an essential part of a conventional narrow-width speaker, are combined with
an edge, and FIG. 5 (b) is a sectional view of the same speaker 6 is an exploded perspective view
of the same, and FIG. 7 is a perspective view of an edge which is the same as the main part.
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1
[0005]
According to the figure, 1 is a voice coil in which a sheet-like material is formed into an inverted
U shape to form a diaphragm portion 1a and a voice coil bobbin portion 1b, and a magnet wire is
wound by a winding jig to form a coil 1c. The edge 2 is coupled to the outer periphery of the
diaphragm portion 1a.
[0006]
Although a sheet of paper is used for the voice coil 1, a high rigidity material such as a metal
material such as hard aluminum is used for a speaker with a large input resistance because of
stability in shape retention.
[0007]
The diaphragm portion 1 a is a portion that generates an elongated air vibration, and the outer
peripheral portion is held by the frame 3 via the edge 2.
Further, it is coupled to the S-shaped damper 7 via a reinforcing rib 8 coupled to the inner
peripheral portion of the voice coil bobbin portion 1 b and is supported by the frame 3 in a freely
vibrating manner.
[0008]
On the other hand, a magnetic circuit consisting of a yoke 4 and a magnet 5 is provided in the
central recess of the frame 3 and the coil 1c fixed to the voice coil bobbin 1b is fitted in the air
gap of this magnetic circuit As a result, the voice coil bobbin portion 1b performs a piston
movement, the diaphragm portion 1a which is the same material vibrates, and a sound wave is
emitted.
[0009]
The edge 2 is joined to the outer peripheral portion of the diaphragm portion 1a of the voice coil
1, and is formed by forming a sheet-like material and removing it from the center.
[0010]
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2
However, although the above-described conventional voice coil 1 uses a metal-based material
particularly in a speaker with high input resistance, a high rigidity material such as a metal-based
one has a small internal loss. It is easy to become a sound pressure frequency characteristic with
a large peak dip.
Furthermore, since the edge 2 is center-punched and adhesively bonded to the diaphragm
portion 1a of the voice coil 1, positioning of the bonding is difficult, and there is a problem that
the bonding area is small and defects due to peeling are easily generated. The
[0011]
The present invention solves the above-mentioned problem, and provides a speaker which
realizes improvement of sound quality, improvement of quality and productivity.
[0012]
SUMMARY OF THE INVENTION In order to solve the above problems, the loudspeaker according
to the present invention is embedded in a magnetic circuit having a magnetic gap, a frame
coupled to the magnetic circuit, and the magnetic gap integrally formed. A voice coil formed of a
high rigidity material including a voice coil portion and a first diaphragm portion, an edge
portion whose outer periphery is coupled to the frame, and a second diaphragm portion coupled
to the first diaphragm portion Since the first diaphragm portion is reinforced by the second
diaphragm portion having a large internal loss, flat sound pressure frequency characteristics can
be obtained. Positioning of bonding and bonding between voice coil and edge is easy and
bonding area is increased to prevent adhesion peeling, which improves sound quality,
productivity and quality. And it makes it possible to provide a speaker which attained.
[0013]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The speaker according to the
present invention as claimed in claim 1 is fitted in a magnetic circuit having a magnetic gap and
a frame coupled to the magnetic circuit, the magnetic gap being integrally formed. A voice coil
formed of a high rigidity material including a voice coil portion and a first diaphragm portion, an
edge portion whose outer periphery is coupled to the frame, and a second diaphragm portion
coupled to the first diaphragm portion It is composed of an edge formed of a material having a
large internal loss, and flattening of a sound pressure frequency characteristic having a large
peak dip by the first diaphragm portion is achieved by utilizing the large internal loss of the edge,
and The edge is composed of an edge and a second diaphragm to facilitate the positioning of the
edge and increase the bonding area so that the edge and voice coil And it makes it possible to
provide excellent speaker capable of preventing the peeling of the first diaphragm portion.
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3
[0014]
Hereinafter, an embodiment of a speaker according to the present invention will be described
with reference to FIGS.
In the description, the same parts as in the prior art will be assigned the same reference
numerals and explanations thereof will be omitted.
[0015]
FIG. 1 is an exploded perspective view of an embodiment of a speaker according to the present
invention, and FIG. 2 (a) is a perspective view for explaining the coupling state of a voice coil and
an edge which is the main part. FIG. 3 is a cross-sectional view in the short diameter direction,
FIG. 3 is a perspective view of an edge which is the main part, and FIG. 4 is a sound pressure
frequency characteristic view.
[0016]
According to the figure, 10 is a voice coil composed of a non-axisymmetric first diaphragm 10a
having a major axis and a minor axis and a voice coil 10b, and 9 is a first diaphragm 10a of the
voice coil 10. The outer periphery of the edge 9a is bonded and fixed to the frame 3 and the
inner diameter side of the second diaphragm 9b is a first edge of the voice coil 10. It is
adhesively fixed to the outer peripheral side of the diaphragm portion 10a.
[0017]
The second diaphragm portion 9b of the edge 9 is formed in a shape in which the inner
peripheral side follows the outer peripheral side of the first diaphragm portion 10a of the voice
coil 10, and the edge 9 is a cloth impregnated with a resin having a large internal loss. Or the like
to reinforce the first diaphragm portion 10a, so that flat sound pressure frequency
characteristics can be obtained, and it is not necessary to pull out the center portion of the edge
portion 9a. Positioning of adhesion with the diaphragm portion 10a can be easily performed, and
since the adhesion area is increased, the peeling of the adhesion can be prevented, and the sound
quality can be improved and the productivity and quality can be improved.
[0018]
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4
FIG. 4 a shows the sound pressure frequency characteristics of the conventional speaker, and
FIG. 4 b shows the one in the present embodiment.
As is clear from the figure, it was confirmed that b had a flat characteristic with less peak dip.
[0019]
As the material of the edge 9, other than the above-described resin-impregnated cloth, a known
thin sheet material such as a rubber thin plate and the like which can be processed into a sheet
having high flexibility for internal loss may be used.
[0020]
According to the speaker of the present invention configured as described above, the first
diaphragm can be reinforced by the second diaphragm having a large internal loss to obtain a
flat sound pressure frequency characteristic, and Positioning of adhesion and bonding between
the coil and the edge is easy and the adhesion area is increased to prevent adhesion peeling, and
it is possible to provide a speaker with improved sound quality, productivity and quality.
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