JP2005064712

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DESCRIPTION JP2005064712
PROBLEM TO BE SOLVED: To provide a panel type speaker device and a diaphragm which
suppress a change in reproduced sound due to a difference in bonding position accuracy
between a vibration generating member and a diaphragm. SOLUTION: An exciter 2 having a coil
and a magnet and vibrating in an audio frequency band, a diaphragm 3 vibrating by the exciter 2,
and a frame 5 formed of a resin molded product and fixing the periphery of the diaphragm 3 And
forming a resin in a panel type speaker device including a damper 4 joined to the other end of
the exciter 2 and holding the exciter 2 and a vibration generating member holding fitting 6 for
joining the exciter 2 and the diaphragm 3 Positioning diaphragms 3a for positioning and fixing
the exciter 2 are provided on the diaphragm 3 formed of a product. [Selected figure] Figure 1
Panel-type speaker device and diaphragm
[0001]
The present invention relates to a panel type speaker device and a diaphragm.
[0002]
A conventional panel-type speaker device includes a vibration generating member vibrating in an
audio frequency band, a diaphragm joined to one end of the vibration generating member and
vibrated by the vibration generating member, and the diaphragm and a cushioning material. A
vibration-generating member holding bracket which is joined to a signal-generating member and
is bonded to a signal-generating member via a damper and is bonded to a diaphragm or joined to
a casing. What used the thing which has a structure pinched ¦ interposed into aluminum
material, and what adhered the carbon fiber to both surfaces of the foam was used (for example,
refer patent document 1).
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[0003]
Here, an assembly procedure of the conventional panel-type speaker device configured as
described above will be described with reference to FIG.
First, the cushioning material 9 is sandwiched by the diaphragm 8, and the diaphragm 8 is fixed
to the housings (frames) 10a, 10b, 10c, and 10d.
Next, the vibration generating member 13 to which the damper 12 is adhered is fixed to the
vibration generating member holding bracket 11 via the spacer 14, and an adhesive is applied to
the vibration generating member 13. It fixes in the preset position of body 10a, 10b, 10c, 10d.
[0004]
In such an assembly procedure, the bonding position 15 of the vibration generating member 13
to the diaphragm 8 is not determined directly, and vibration is performed to the diaphragm 8 via
the housings 10a, 10b, 10c and 10d and the vibration generating member holding fitting 11.
Since the bonding position 15 of the generating member 13 is determined, the fitting error of the
diaphragm 8 and the housings 10a, 10b, 10c and 10d and the fitting of the housings 10a, 10b,
10c and 10d and the vibration generating member holding fitting 11 An error is included, and
the variation of the bonding position 15 between the diaphragm 8 and the vibration generating
member 13 is about ± 2 mm. Therefore, in the panel type speaker device utilizing the resonance
mode of diaphragm 8, the positional deviation of the driving point is likely to affect the sound
quality, and as shown in FIG. It will be different. JP 11-512249 A (page 11-13, FIG. 1)
[0005]
However, in such a conventional panel-type speaker device, since the bonding position of the
vibration generating member to the diaphragm is determined through the housing and the
vibration generating member holding bracket, if the bonding position of the vibration generating
member varies, the sound quality also becomes There was a problem that it was uneven.
[0006]
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The present invention has been made to solve such a problem, and it is a panel type speaker
device and a diaphragm that improves the sound quality by suppressing a change in reproduced
sound due to a difference in bonding position accuracy between the vibration generating
member and the diaphragm. To provide
[0007]
The diaphragm of the present invention has a configuration provided with a positioning convex
portion used for bonding with a vibration generating member that vibrates in the audio
frequency band.
According to this configuration, since positioning can be performed directly by the positioning
convex portion without using the case and the vibration generating member holding bracket, it is
possible to suppress a change in reproduced sound due to a difference in bonding position
accuracy between the vibration generating member and the diaphragm. Become.
Furthermore, the positioning operation for joining the vibration generating member to the
diaphragm becomes easy.
[0008]
Further, the diaphragm of the present invention has a configuration in which a positioning
convex portion used when fixedly joined to one end of the vibration generating member vibrating
in the audio frequency band is provided. According to this configuration, since positioning can be
performed directly by the positioning convex portion without using the case and the vibration
generating member holding bracket, it is possible to suppress a change in reproduced sound due
to a difference in bonding position accuracy between the vibration generating member and the
diaphragm. Become. Furthermore, the positioning operation for joining the vibration generating
member to the diaphragm becomes easy. Here, the diaphragm is preferably made of glasscontaining ABS resin (copolymer of acrylonitrile, butadiene, and styrene).
[0009]
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The panel-type speaker device according to the present invention includes a vibration generating
member that vibrates in an audio frequency band, the diaphragm according to claim 1 or 2,
which is joined to the vibration generating member and vibrated by the vibration generating
member. The vibration generating member holding metal fitting which is joined to the generating
member via a damper and joined to the vibrating plate is provided. According to this
configuration, since positioning can be performed directly by the positioning convex portion
without using the case and the vibration generating member holding bracket, it is possible to
suppress a change in reproduced sound due to a difference in bonding position accuracy
between the vibration generating member and the diaphragm. Become. Further, the assembling
operation of the panel type speaker device including the positioning operation when joining the
vibration generating member to the diaphragm is reduced.
[0010]
Furthermore, the panel type speaker apparatus of this invention has the structure which
provided the frame joined to the outer edge of the said diaphragm. With this configuration, when
the panel-type speaker device is installed on a ceiling material or a wall material, a gap generated
between the diaphragm and the ceiling surface or wall surface is concealed to maintain the
appearance of the installation surface.
[0011]
According to the present invention, the positioning position accuracy between the vibration
generating member and the diaphragm is provided by providing the diaphragm with a
positioning convex portion used when bonding the diaphragm to one end of the vibration
generating member vibrating in the audio frequency band. It is possible to provide a panel type
speaker device and a diaphragm having an excellent effect of improving the sound quality by
suppressing the change of the reproduced sound due to the difference of
[0012]
Hereinafter, embodiments of the present invention will be described with reference to the
drawings.
[0013]
First Embodiment As shown in FIG. 1, a panel-type speaker device 1 according to a first
embodiment of the present invention is a vibration generating member (hereinafter referred to as
an exciter) that vibrates in an audio frequency band on a diaphragm 3 And a positioning convex
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portion 3a used for bonding to (2).
[0014]
In FIG. 1, a panel type speaker device 1 has a coil and a magnet, and is connected to one end of
the exciter 2 and a vibration generating member 2 which vibrates in an audio frequency band,
and driven by the exciter 2. A vibrating plate 3 that vibrates, a housing (hereinafter referred to as
a frame) 5 that fixes the periphery of the vibrating plate 3, a damper 4 that is joined to the other
end of the exciter 2 to hold the exciter 2, an exciter 2 and a frame And a vibration-generating
member holding fitting 6 for joining 5 together.
[0015]
Further, the diaphragm 3 is formed of a resin molding material (here, a thermoplastic resin such
as an ABS resin containing glass), and as shown in FIG. 2, determines the bonding position of the
exciter 2 to the diaphragm 3 Positioning projections 3a are integrally formed.
By bonding the exciter 2 along the positioning convex portion 3a, the bonding position of the
exciter 2 to the diaphragm 3 falls within an error range of ± 0.1 mm.
With such mounting accuracy, the variation in sound quality due to the variation in bonding
position of the exciter 2 to the diaphragm 3 is reduced.
By using a thermoplastic resin such as an ABS resin containing glass, processing and shaping of
the entire diaphragm 3 including the positioning convex portion 3a is easy.
[0016]
As described above, in the panel-type speaker device 1 according to the first embodiment of the
present invention, the diaphragm 3 is provided with the positioning convex portion 3a used for
bonding with the vibration generating member 2 vibrating in the audible frequency band.
Therefore, it is possible to improve the sound quality by suppressing the change in reproduced
sound due to the difference in the bonding position accuracy between the vibration generating
member 2 and the diaphragm 3 to a small value.
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[0017]
Second Embodiment FIG. 3 shows a cross-sectional view of an essential part of a second
embodiment of the present invention.
This is different from the first embodiment in that a frame 5a joined to the outer edge of the
diaphragm 3 is further provided.
According to this configuration, when the panel type speaker device 1 is installed on a ceiling
material or a wall material, an effect of being able to be installed without impairing the
appearance of the installation surface is also obtained. The same components as those in the first
embodiment are assigned the same reference numerals and explanation thereof is omitted.
[0018]
In FIG. 3, a decorative frame (hereinafter also referred to as a frame) 5a incorporated in the panel
type speaker device 1 is manufactured by molding a plastic resin material containing a
thermoplastic resin, and supports the diaphragm 3 It is a structure, and hides a gap generated
between the diaphragm 3 and the ceiling surface or wall surface when the panel type speaker
device 1 is installed on the ceiling surface or wall surface (shown in FIG. 4). Here, the frame 5 a is
bonded with an adhesive 7 also serving as a cushioning material at several places on the outer
edge of the diaphragm 3.
[0019]
The present invention is useful for a panel type speaker device using a diaphragm.
[0020]
Sectional drawing which shows the panel type speaker apparatus of the 1st Embodiment of this
invention Sectional view which shows the diaphragm convex part of 1st Embodiment of this
invention Panel type speaker apparatus of the 2nd Embodiment of this invention 2 is a crosssectional view showing a mounting state of the panel type speaker device of the second
embodiment of the present invention an exploded perspective view showing the component
configuration of the conventional panel type speaker device showing frequency characteristics of
the conventional panel type speaker device Figure
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Explanation of sign
[0021]
DESCRIPTION OF SYMBOLS 1 panel type speaker apparatus 2, 13 vibration generating member
3, 8 diaphragm 4, 12 damper 5, 10a, 10b, 10c, 10d housing ¦ casing (frame) 5a frame (frame) 6,
11 vibration generating member holding bracket 3a positioning For convex part 7 Adhesive 9
Cushion material 14 Spacer 15 Bonding position 16 Variation of frequency characteristics
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