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JP2013038682

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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 JP2013038682
PROBLEM TO BE SOLVED: To smoothly remove a liquid which has entered into a casing from a
sound hole of the casing. A speaker device comprising a housing 3 and a vibrating film 4
disposed inside the housing 3, and a wall of the housing 3 is provided with a sound hole 11
through which a sound emitted from the vibrating film 4 passes. In FIG. 1, the heat dissipation
film 15 provided around the sound hole 11 on the inner surface of the housing 3 is provided.
The vibrating film 4 is at least partially formed of a heat dissipating material. [Selected figure]
Figure 2
Speaker apparatus and electronic device
[0001]
The present invention relates to a speaker device having a waterproof structure, and an
electronic device provided with the speaker device.
[0002]
In recent years, with the expansion of the use environment of mobile phones, waterproof mobile
phones are increasing.
Some waterproof mobile phones include a speaker device having a waterproof structure.
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1
[0003]
As this type of speaker device, as shown in FIG. 5, a front side housing 103 having a sound hole
111, a diaphragm 104 disposed inside the housing 103, a sound hole 111 and a diaphragm 104
are provided. A configuration is known that includes a waterproof film 110 arranged to be
partitioned and a back side housing 106 that supports the diaphragm 104 and the waterproof
film 110 (see Patent Document 1). The outer peripheral portion of the waterproof film 110 is
fixed to the back side housing 106 by an adhesive. Even when the liquid intrudes from the sound
hole 111 toward the inside of the front side housing 103, the waterproof film 110 prevents the
liquid from adhering to the diaphragm 104.
[0004]
Japanese Patent Application Laid-Open No. 8-79865
[0005]
By the way, also in the speaker device described in Patent Document 1 described above, it is not
possible to prevent the infiltration of the liquid from the sound hole toward the inside of the
front side housing, and the liquid infiltrated from the sound hole adheres to the waterproof film,
There has been a problem that the liquid that has entered the inside of the side case is difficult to
remove.
[0006]
Further, in the configuration described in Patent Document 1, there is also a possibility that the
droplets attached to the waterproof film may further infiltrate into the diaphragm side, so that
the liquid which has infiltrated into the housing from the sound hole can be quickly removed
from inside the housing. It is desired.
[0007]
Then, an object of this invention is to provide the speaker apparatus and electronic device which
can solve the subject of the said related technology.
An example of the object of the present invention is to provide a speaker device and an electronic
device capable of removing the liquid that has entered from the sound hole.
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2
[0008]
In order to achieve the above-described object, the speaker device according to the present
invention includes a housing and a diaphragm disposed inside the housing, and a wall of the
housing is a sound hole through which a sound emitted by the diaphragm passes. The speaker
apparatus is provided with a heat dissipation member provided around the sound hole on the
inner surface of the housing.
The diaphragm is at least partially formed of a heat dissipating material.
[0009]
Further, an electronic device according to the present invention includes the speaker device of
the present invention and an electronic circuit electrically connected to the speaker device.
[0010]
According to the present invention, it is possible to smoothly remove the liquid that has entered
the inside of the housing from the sound hole of the housing, and the waterproofness of the
speaker device can be improved.
[0011]
It is a top view which shows the speaker apparatus of embodiment.
It is a sectional view showing a speaker apparatus of an embodiment.
In the speaker apparatus of embodiment, it is sectional drawing for demonstrating the thermal
radiation member formed around the sound hole of the inner surface of a housing ¦ casing.
It is a schematic diagram which shows the portable terminal device of embodiment provided with
the speaker apparatus of embodiment. It is a sectional view showing a speaker device related to
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the present invention.
[0012]
Hereinafter, specific embodiments of the present invention will be described with reference to
the drawings.
[0013]
The top view of the speaker apparatus of embodiment is shown in FIG.
FIG. 2 shows a cross-sectional view of the speaker device of the embodiment. FIG. 3 is a crosssectional view for explaining the heat dissipation member formed around the sound hole on the
inner surface of the housing in the speaker device of the embodiment.
[0014]
As shown in FIG. 1, the speaker device 1 according to the embodiment includes a housing 3, a
vibration film 4 as a diaphragm disposed inside the housing 3, and an electromagnetic drive unit
5 for driving the vibration film 4. And a frame 6 for supporting the vibrating film 4 and the
electromagnetic drive unit 5.
[0015]
As shown in FIG. 2, the wall of the housing 3 is provided with a sound hole 11 through which the
sound emitted from the vibrating film 4 passes.
The sound hole 11 has, as shown in FIGS. 2 and 3, an enlarged diameter portion 12 formed on
the outer peripheral side of the outer surface of the housing 3 so as to expand the diameter of
the sound hole 11. The enlarged diameter portion 12 has a cylindrical shape formed
concentrically with the sound hole 11, and is formed in a step-like shape with respect to the
penetration direction of the sound hole 11. The sound hole 11 has the enlarged diameter portion
12 so that the liquid which has entered the sound hole 11 from the outer surface side of the
housing 3 is suppressed by the enlarged diameter portion 12 and the liquid enters the inner
surface side of the housing 3. I'm preventing.
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[0016]
The housing 3 has a plurality of asperities 14 formed around the sound hole 11 on the inner
surface of the housing 3 as shown in FIG. Then, on the inner surface of the housing 3, a heat
dissipation film 15 as a heat dissipation member is formed of a material having thermal
conductivity so as to cover the unevenness 14 around the sound hole 11. The heat radiation film
15 is formed on the entire inner surface of the housing 3 located inside the frame 6 except for
the sound holes 11. Moreover, since the surface area in which the thermal radiation film 15 is
formed is increased by having the unevenness ¦ corrugation 14 on the inner surface of the
housing ¦ casing 3, it becomes possible to improve heat dissipation.
[0017]
As shown in FIG. 2, the vibrating film 4 has a central portion 4 a and a peripheral portion 4 b
formed on the outer peripheral side of the central portion 4 a. The peripheral portion 4 b of the
vibrating film 4 is fixed to the inner surface of the frame 6.
[0018]
The central portion 4 a of the vibrating film 4 is formed of a heat dissipating material. The
central portion 4a of the vibrating film 4 and the heat radiation film 15 are made of, for example,
a material having a relatively high thermal conductivity, such as copper.
[0019]
Also, the vibrating film 4 may be formed of a material having heat dissipating properties as well
as the peripheral section 4b, and since the heat dissipating properties of the vibrating film 4 are
further enhanced, the liquid in the housing 3 is further reduced. It can be removed quickly.
[0020]
The electromagnetic drive unit 5 has a voice coil 5a fixed to the central portion 4a of the
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vibrating film 4 and a permanent magnet 5b disposed on the inner peripheral portion of the
voice coil 5a.
The electromagnetic drive unit 5 is fixed on the bottom of the frame 6.
[0021]
With respect to the speaker device 1 configured as described above, a state in which the liquid
that has entered the inside of the housing 3 is removed will be described.
[0022]
In the speaker device 1, when liquid intrudes from the sound hole 11 of the housing 3, the liquid
adheres to the periphery of the sound hole 11 on the inner surface of the housing 3 and the
vibrating film 4.
In the speaker device 1, the central portion 4 a of the vibrating film 4 is heated by the heat
generated as the electromagnetic drive unit 5 is driven, and the heat dissipation film 15 formed
on the inner surface of the housing 3 is heated. By heating the central portion 4 a of the vibrating
film 4 and the heat radiation film 15, the droplets adhering to the vibrating film 4 and the inner
surface of the housing 3 are evaporated and removed to the outside of the housing 3 through the
sound holes 11. Can.
[0023]
As described above, according to the speaker device 1 of the embodiment, the heat dissipation
film 15 is formed around the sound hole 11 on the inner surface of the housing 3, and the
central portion 4 a of the vibrating film 4 is made of a heat-resistant material. By forming the
liquid, even if the liquid intrudes into the inside of the housing 3, the liquid adhering to the inner
surface of the housing 3 and the vibrating film 4 is vaporized and smoothed from the sound hole
11 to the outside of the housing 3. Can be removed.
[0024]
In addition, according to the present embodiment, the heat dissipation around the vibration film
4 and the sound hole 11 of the housing 3 is enhanced, so the heat dissipation of the entire
speaker device 1 can also be improved.
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[0025]
Finally, a configuration example of a portable terminal device as an electronic device to which the
speaker device 1 of the above-described embodiment is applied will be briefly described with
reference to the drawings.
[0026]
FIG. 4 shows a schematic view of the mobile terminal device of the embodiment.
As shown in FIG. 4, the mobile terminal device 31 according to the embodiment includes the
above-described speaker device 1, a display panel 30 that displays various types of information,
and an electric circuit electrically connected to the speaker device 1 and the display panel 30.
And (not shown).
[0027]
According to the mobile terminal device 31 of the embodiment, the handleability of the mobile
terminal device 31 can be improved by providing the speaker device 1 with improved
waterproofness.
[0028]
The speaker device according to the present invention is not limited to the speaker device
according to the above-described embodiment, and may be applied to a speaker device provided
with a waterproof film disposed between the sound hole and the diaphragm, for example. Well,
the waterproofness of the speaker device can be further improved.
[0029]
Reference Signs List 1 speaker device 3 housing 4 vibration film 4 a central portion 11 sound
hole 15 heat dissipation film
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