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JP2011139254

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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 JP2011139254
An object of the present invention is to waterproof a mobile terminal especially in a receiver for
receiving voice used in a mobile terminal or the like. It breaks and water infiltrates. SOLUTION: A
body and an edge of a diaphragm are formed by two-color resin molding, and a convex portion
made of the same material as the edge is provided on the upper side of the outer edge, and the
same material as the body is provided on the lower side of the outer edge. By providing the
gasket, the diaphragm and the edge can have higher strength than that of the conventional thin
resin film, so that the diaphragm is prevented from being damaged by the entry of water.
Furthermore, the convex part which consists of the same material as an edge plays a role of
waterproof packing, and prevents that water infiltrates into the inside of an apparatus from the
diaphragm outer periphery. [Selected figure] Figure 1
Speaker diaphragm, speaker using the same, and portable terminal device
[0001]
The present invention relates to a speaker used in various portable terminal devices.
[0002]
More specifically, it relates to waterproofing technology for speakers and receivers for receiving
calls.
[0003]
Conventionally, this type of receiver for receiver has a configuration as shown in FIG.
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1
[0004]
FIG. 5 is a cross-sectional view of a conventional receiver.
In FIG. 5, reference numeral 31 denotes a diaphragm made of a thin film material.
[0005]
The same components as those of the speaker of the present invention shown in FIGS. 1 and 2
are denoted by the same reference numerals and the description thereof will be omitted.
[0006]
FIG. 6 is a schematic structural cross-sectional view of a waterproof cellular phone using this
type of receiver, in which a waterproof sheet 32 made of a moisture-permeable waterproof
material or the like is used to prevent water from entering the sound output hole 17. It is
attached.
[0007]
As prior art document information related to the invention of this application, for example,
Patent Document 1 and Patent Document 2 are known.
[0008]
JP, 2000-201396, A JP, 8-079865, A
[0009]
However, when attempting to waterproof the portable terminal device with the above-described
conventional configuration, since the diaphragm is made of a thin film material, sufficient
strength against water immersion can not be ensured, and the diaphragm is broken and water
Had the problem of infiltration.
[0010]
Therefore, in order to make the receiver waterproof, it has been necessary to seal the sound
output hole of the receiver with a waterproof sheet represented by a moisture permeable
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2
waterproof material.
[0011]
However, in such a structure, the waterproof sheet receives the sound pressure from the
diaphragm, which causes a problem such as generation of a buzzing abnormal sound or
inhibition of the emitted sound to deteriorate the acoustic characteristics.
[0012]
In addition, it is difficult to put a waterproof sheet on a set or a receiver with high accuracy, and
there is a problem that the yield and the waterproof reliability are deteriorated.
[0013]
Furthermore, there is also a problem that the waterproof sheet causes a cost increase.
[0014]
The present invention is to solve the above-mentioned problems, and an object of the present
invention is to establish a waterproof mechanism by a single receiver without using a waterproof
sheet.
[0015]
In order to achieve the above object, the diaphragm of the present invention comprises a body
and an edge formed by two-color resin molding, and a convex portion made of the same material
as the edge is provided on the upper side of the outer edge. Is provided with a gasket made of the
same material as the body.
[0016]
With this configuration, unlike the conventional speaker or receiver diaphragm shown in FIG. 5,
the edge and the body can be made of different materials, so that the body can achieve high
rigidity and the edge can have low stiffness.
[0017]
Therefore, the diaphragm is not made of a thin film material even if it is submerged or
submerged in water, but the diaphragm is not made of a thin film material, but is a rigid
diaphragm with a proper material thickness obtained by injection molding. Therefore, it is
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difficult to deform or break, and waterproof performance can be improved.
[0018]
Furthermore, since the edge is formed of an elastomer or the like having a very low elastic
modulus as compared with the film material used for the conventional receiver diaphragm, the
material thickness of the edge is increased even with the same stiffness. The edge is also more
robust than before, and the reliability against water pressure can be improved.
[0019]
Also, if it is attempted to fix the edge and the body with an adhesive, it is difficult to apply and
adhere the adhesive completely uniformly without gaps, there is the possibility of deterioration
due to aging, and gaps occur. There is a risk of infiltration when water is poured.
[0020]
In the present invention, since the edge and the body are heat-sealed by molding the diaphragm
by two-color molding, water does not infiltrate from there even if it is splashed with water, and
the reliability of waterproofing is improved. It can be improved.
[0021]
Furthermore, the convex part which consists of the same material as an edge plays a role of
waterproof packing, and the waterproof effect which prevents that water infiltrates into the
inside of the portable terminal device which attached the speaker from the diaphragm outer
periphery is acquired.
[0022]
According to the present invention, since the diaphragm and the edge can have higher strength
than conventional thin resin films, the diaphragm and the edge can be prevented from being
damaged by the entry of water.
[0023]
Furthermore, the convex part which consists of the same material as an edge plays a role of
waterproof packing, and it is effective in preventing that water infiltrates into the apparatus
inside which attached the speaker from the diaphragm outer periphery.
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[0024]
Cross-sectional view of the speaker diaphragm of the present invention cross-sectional view of
the speaker of the present invention side view of the speaker of the present invention schematic
cross-sectional view of a portable terminal device equipped with the speaker of the present
invention cross-sectional view of a conventional receiver mounted conventional receiver
Schematic cross-sectional view of a mobile terminal device
[0025]
Hereinafter, embodiments of the present invention will be described using the drawings.
[0026]
First Embodiment The invention according to the first aspect of the present invention will be
described below with reference to the first embodiment.
[0027]
FIG. 1 is a cross-sectional view of the speaker diaphragm of the present invention.
[0028]
In FIG. 1, 1 is a diaphragm, 2 is a body, 3 is an edge, 4 is a gasket, and 5 is a convex portion
(hereinafter referred to as "convex portion") provided on the upper surface of the edge.
[0029]
The diaphragm 1 is formed by two-color molding.
[0030]
First, after the body 2 and the gasket 4 are primarily formed, the edge 3 and the convex portion
5 are secondarily formed.
For example, a resin material typified by polypropylene is used for the body and the gasket, and
an elastomer or the like of a low elastic modulus material is used for the edge and the convex
portion, and the flexibility and airtightness maintainability thereof are matched to the respective
usage requirements. It is selected in consideration of the sound quality and the like.
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[0031]
The operation and effects of the speaker diaphragm will be described.
[0032]
Unlike the conventional speaker or receiver diaphragm shown in FIG. 5, the edge and the body
are made of different materials, so that the body can realize high rigidity and the edge can realize
low stiffness.
[0033]
Therefore, it is difficult for it to be deformed or broken even if it is submerged in water or
submerged and water pressure is applied, and waterproof performance can be improved.
[0034]
Furthermore, since the edge is formed of an elastomer or the like, which has a very low elastic
modulus as compared to the film material used for the conventional receiver diaphragm, the
edge thickness should be increased even with the same stiffness. Can.
[0035]
Therefore, the edge is also more robust than before, and the reliability against water pressure
can be improved.
[0036]
If it is going to fix the edge and the body with an adhesive, it is difficult to apply and stick the
adhesive completely uniformly without gaps, there is a possibility of deterioration due to aging,
and gaps are generated There is a risk of infiltration if it is applied.
[0037]
In the present invention, since the edge and the body are heat-sealed by molding the diaphragm
by two-color molding, water does not infiltrate from there even if it is splashed with water, and
the reliability of waterproofing is improved. It can be improved.
[0038]
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The gasket is provided mainly for handling since the gasket is very soft and difficult to handle
because the edge is formed of a low elasticity material.
Since heat sealing is also performed between the gasket and the edge, the reliability against
peeling is high, and as a result, the stiffness is stabilized, and the f0 (minimum resonant
frequency) of the speaker can be stabilized.
[0039]
The convex part is pressurized and compressed when the speaker is configured, plays a role of
packing, and even if water intrudes from the upper surface side of the diaphragm, it is blocked by
the convex part and water infiltrates to the outside of the convex part. It is preventing.
[0040]
In addition, in FIG. 1, although the convex part is drawn in substantially semicircular shape, a
shape like an ellipse, a square, and a triangle shape may be sufficient, and a designer can select
arbitrarily in view of the effect of waterproofing.
[0041]
The convex portion is also made of the same material as the edge and is simultaneously formed
in two colors, and no gap is generated between the edge and the convex portion.
Therefore, it is possible to improve the reliability against water immersion as compared with the
configuration in which the convex portion is configured separately by a sealing material or the
like.
[0042]
Second Embodiment The second embodiment of the present invention will be described below
with reference to the second aspect of the present invention.
[0043]
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FIG. 2 is a cross-sectional view of a speaker using the speaker diaphragm of the present invention
shown in FIG.
[0044]
The components of the diaphragm shown in FIG.
[0045]
6 is a speaker, 7 is a frame, 8 is a yoke, 9 is a magnet, 10 is a plate, 14 is a voice coil, 15 is a
protector, 16 is a packing having waterproof performance (hereinafter "waterproof packing"), 17
is a sound release hole is there.
[0046]
FIG. 3 is an example of a side view of the speaker of FIG.
Reference numeral 18 denotes a fitting hole (hereinafter referred to as "fitting hole") provided in
the protector, and 19 denotes a fitting portion (hereinafter referred to as "fitting portion")
provided in the frame.
[0047]
The configuration and operation of the speaker of the present invention will be described.
[0048]
The yoke 8, the magnet 9 and the plate 10 constitute a magnetic circuit 11.
[0049]
A magnetic gap 12 for generating a magnetic field is formed in the magnetic circuit 11, and a
voice coil 14 is inserted in the magnetic gap 12.
[0050]
When an audio signal flows through the voice coil 14, the magnetic field of the magnetic gap 12
acts on the voice coil 14 according to Fleming's left-hand rule, and the voice coil 14 vibrates up
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and down.
[0051]
The voice coil 14 is fixed to the lower surface of the body, and the vibration of the voice coil 14
radiates a sound by acting on air through the body 2.
[0052]
The edge 3 supports the body 2 so that the body 2 vibrates up and down correctly, and blocks
the back noise of the body so that the antiphase sound of the back of the body does not interfere
with the sound of the body surface by diffraction.
[0053]
The operation and effects of the speaker of the present invention will be described.
[0054]
The convex portion 5 is sandwiched between the gasket 4 and the protector 15 and
appropriately compressed to be in close contact with the protector 15.
By this, even if water intrudes from the sound release hole 17, it is blocked by the convex
portion.
[0055]
If water intrudes from inside the space between the projection 5 and the protector 15 into the
inside of the portable terminal device to which the speaker is attached, the electric circuit may be
shorted or corroded and broken.
[0056]
According to this configuration, the water does not get over the convex portion and enter the
inside of the portable terminal device to which the speaker is attached.
[0057]
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The joining method of the protector 15 and the frame 7 and the compression method of the
convex portion 5 are such that, for example, as shown in FIG. 3, the fitting hole 18 provided in
the protector 15 is hooked on the fitting portion 19 provided in the frame 7 The projections 5
can be reliably compressed by fitting them to each other.
[0058]
In addition, although the material of the protector 15 shown in FIG. 3 assumes resin, it may be
metal.
[0059]
Further, the method of bonding the protector 15 and the frame 7 may be bonding which is
commonly performed conventionally.
[0060]
Furthermore, although there is nothing at the front of the protector in FIG. 3 and the sound
output hole is drawn in an exposed manner, a plurality of sound output holes may be provided or
a mesh may be attached to the sound output hole so as to protect the diaphragm. It does not
matter.
[0061]
The magnetic circuit shown in FIG. 3 is of the inner magnet type, but may be of the outer magnet
type.
The shape of the speaker may be any shape of round, rectangular, and track.
[0062]
Third Embodiment The invention according to the third aspect of the present invention will be
described with reference to the third embodiment.
[0063]
FIG. 4 is an example of a schematic cross-sectional view of a portable terminal device equipped
with the speaker of the present invention shown in FIG.
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[0064]
Reference numeral 20 denotes a portable terminal device, and 21 denotes a sound output hole
(hereinafter referred to as "set sound output hole") provided in the portable terminal device.
[0065]
The operation and effects of the mobile terminal device of FIG. 4 will be described.
[0066]
The speaker 6 is joined by applying an appropriate pressure from the back so as to compress the
waterproof packing 16.
As a result, even if water intrudes from the set sound emission hole, water does not infiltrate into
the portable terminal device from the top surface of the protector.
[0067]
Further, since the outer peripheral portion of the edge of the speaker 6 also has a waterproof
function by the convex portion, water does not infiltrate into the portable terminal device.
[0068]
Furthermore, since the body has high rigidity, the edge is a low elasticity material and has a
suitable thickness, and the diaphragm is formed by two-color molding, the edge and the body
joint surface are closely adhered by heat fusion. There is no damage to water pressure and no
infiltration of water.
[0069]
The waterproof packing 16 may be any material having waterproof performance, and packing, a
rubber ring, a 0 ring, a sealing material, an adhesive and the like can also be used.
[0070]
In FIG. 4, the set sound emission hole is in the exposed state, but in view of the diaphragm
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protection and the dustproof effect, a configuration having a plurality of sound emission holes
may be used, or a dustproof net or mesh which does not adversely affect the sound quality. It is
also conceivable to put
[0071]
In addition, the portable terminal device expressed here is applicable not only to a mobile
telephone and a portable information terminal but to all the terminal devices having a sound
generation function such as a game and a portable audio.
[0072]
As described above, in the speaker diaphragm and the speaker according to the present
invention, the diaphragm is formed by two-color molding to ensure sufficient strength against
water immersion and the bonding between the edge and the body is completely in close contact.
So there is no water ingress.
[0073]
Therefore, in order to make the receiver waterproof, it is not necessary to seal the sound release
hole of the receiver with a waterproof sheet typified by a moisture-permeable waterproof
material, and the waterproof sheet receives the pressure by the sound pressure from the
diaphragm, It is possible to avoid the problem that a buzzing abnormal sound is generated or the
radiation sound is disturbed to deteriorate the acoustic characteristics.
[0074]
Furthermore, it is difficult to accurately attach the waterproof sheet to the set or the receiver, and
the problem of deteriorating the yield and the waterproof reliability can be avoided.
[0075]
Moreover, the cost increase by a waterproof sheet can also be avoided.
[0076]
Therefore, it is useful for waterproofing of a speaker single-piece | unit, and useful for
waterproofing of a portable terminal device.
[0077]
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The present invention can be applied to a speaker or receiver that requires waterproofing, and a
portable terminal device equipped with these.
[0078]
DESCRIPTION OF SYMBOLS 1 diaphragm 2 body 3 edge 4 gasket 5 convex part provided on the
upper surface 6 speaker 7 frame 8 yoke 9 magnet 10 plate 11 magnetic circuit 12 magnetic gap
14 voice coil 15 protector 16 packing having waterproof performance 17 sound output hole 18
protector Fitting holes provided in the frame 19 Fitting parts provided in the frame 20 Mobile
terminal device 21 Sound emitting hole provided in the mobile terminal device 31 Film
diaphragm 32 Waterproof sheet
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