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JP2006020012

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2006020012
The present invention relates to an electro-acoustic transducer and an electronic device used for
an audio device, and an object thereof is to improve the reliability and quality of the electroacoustic transducer. According to the present invention, the stopper 29a of the terminal 30 is
configured to be able to control the bending range of the terminal 30 by extending at least a part
of the end portion of the protector 29 so that the stopper 29a is substantially resistant to an
impact force. Since it receives a force in a right-angled shape, it has strong impact resistance,
strengthens the stopper 29a from an external force, and always maintains a strong spring
pressure without exceeding the reversible limit value of the spring pressure of the metal terminal
of the terminal. Is designed to be able to [Selected figure] Figure 1
Electro-acoustic transducer and electronic device using the same
[0001]
The present invention relates to an electro-acoustic transducer used for various audio devices
and information communication devices, and electronic devices such as mobile phones and game
devices.
[0002]
The prior art will be described with reference to FIGS. 7 to 11.
FIGS. 7 to 9 are cross-sectional views of conventional electroacoustic transducers, which are used
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as speakers and receivers mounted on electronic devices such as mobile phones. 10 to 11 are
cross-sectional views of the electro-acoustic transducer mounted on an electronic device such as
a mobile phone.
[0003]
As shown in FIG. 7, the magnetized magnet 1 is sandwiched between the upper plate 2 and the
yoke 3 to form an internal magnetic circuit 4. The magnetic circuit 4 is press-fit to the resin
frame 6 in which a part of the terminal 10 is molded while being in contact with the yoke 3 of
the magnetic circuit 4 and bonded by bonding.
[0004]
Then, a diaphragm 7 is adhered to the peripheral portion of the frame 6, a voice coil 8 for driving
the diaphragm 7 is coupled to the diaphragm 7, and the voice coil 8 is coupled so as to fit in the
magnetic gap 5. There is. Thereafter, the lead wire of the voice coil 8 is soldered and coupled to
one end of the terminal 10. Finally, the substantially central portion of the terminal 10 is folded
in two so that the terminal 10 does not protrude outside from the outside dimension of the frame
6, and the other end is configured as a power supply terminal to the system side doing.
[0005]
Here, the terminal 10 is structured such that a sheet of sheet-like metal plate having conductivity
is bent and brought into contact with the feeding portion using the spring pressure of the metal
plate. Then, by forming the stopper 9 by bending the final end of the sheet-like metal plate of the
terminal 10 to the extent that the bending of the metal plate does not exceed the reversible limit
value of the metal material, the bending range is I have control.
[0006]
8 and 9 are sectional views showing the state of the terminal 10 shown in FIG. 7. Assuming that
the state of the terminal 10 shown in FIG. 7 is the top dead center, FIG. 8 shows the terminal 10
at the bottom dead center. It is in the state of reaching. In FIG. 9, after the terminal 10 of FIG. 8
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reaches the bottom dead center, a further excessive force is applied, and the stopper 9 is
deformed and crushed.
[0007]
10 to 11 are cross-sectional views of a state where the above-described electroacoustic
transducer is mounted on an electronic device such as a mobile phone, and FIG. 10 shows that
the terminal 10 is bent to some extent and the spring suitable for the feeding portion on the set
side. It shows a state where pressure is applied. In FIG. 11, the terminal 10 is pushed by the
feeding portion on the set side and deformed due to an external factor such as a drop impact of
the mobile phone, and after reaching the bottom dead center, an excessive force is applied to
deform the stopper 9 It is in a state of being crushed. In this case, the stopper 9 is deformed
beyond the reversibility limit value of the metal material, and once impacted, it does not return to
its original state even when the pressure is removed.
[0008]
As prior art document information related to the invention of this application, for example,
Patent Document 1 is known. Unexamined-Japanese-Patent No. 2003-37890
[0009]
The above-mentioned electroacoustic transducer is strongly demanded by the market from the
market to improve the reliability of electronic devices such as mobile phones. Therefore, in order
to improve the reliability of these electronic devices, it is essential to improve the reliability of the
electroacoustic transducers mounted on the electronic devices.
[0010]
Based on the above background, conventional problems will be described. A speaker or receiver,
which is a conventional electro-acoustic transducer of this type, generates a spring pressure of
the metal terminal of the terminal 10 and is coupled to a power supply on the system side by
contact.
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[0011]
However, when these speakers are attached to a set, if the pressing size of the speaker is set
large, the stopper 9 of the terminal 10 may be deformed, and the spring pressure limit value of
the metal terminal of the terminal 10 may be exceeded. .
[0012]
Furthermore, if these electronic devices such as mobile phones are dropped by mistake, the
stopper 9 of the terminal 10 is crushed by an excessive impact force, and the spring pressure
limit value of the metal terminal of the terminal 10 is exceeded. Sometimes.
This is because the stopper 9 is also made of the same kind of metal terminal and has a spring
pressure, but this stopper 9 also causes permanent deformation by exceeding the reversible limit
value of the spring pressure. .
[0013]
In this case, the spring pressure of the terminal 10 and the stopper 9 is reduced, so that the
contact coupling with the set power supply section becomes unstable, causing contact failure
when the set is shocked or vibrated, It had the problem that the signal was cut off.
[0014]
The above-described problems occur not only in the type in which the stopper 9 is formed on the
terminal 10 but also in the type in which the stopper is integrally molded of resin at the time of
injection molding of the resin frame.
In this type, the resin stopper is broken by an impact and the spring limit of the metal terminal of
the terminal is exceeded.
[0015]
From the above reasons, it has been a challenge to configure the structure in which the spring
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pressure of the terminal 10 does not decrease so that the speaker signal will not be interrupted
even if the set is shocked or vibrated.
[0016]
The present invention solves the above problems, and provides an excellent electroacoustic
transducer capable of realizing stable signal supply to a speaker by preventing a decrease in
spring pressure of a terminal, and an electronic device using the same. It is.
[0017]
In order to achieve the above object, the present invention is intended to strengthen the stopper
so that the bending of the terminal does not exceed the reversible limit of the metal material.
That is, the stopper of the terminal is not formed from a material weak to pressure deformation
or impact force such as bending the sheet-like metal plate which is the terminal, or forming by a
resin, but an impact force It is configured to be formed into a shape that is strong against impact
force with a strong material.
[0018]
The stopper is configured to extend at least a part of the end portion of the protector as a
stopper, and to adjust the height of the stopper to control the bending range of the terminal.
According to this configuration, the stopper receives a force in a substantially perpendicular
shape with respect to the pressure deformation and the impact force, so that the stopper has a
strong resistance to deformation and has a strong impact resistance. Therefore, with respect to
the deformation of the terminal, the function can be achieved without causing the deformation or
destruction of the stopper itself.
[0019]
For this reason, when attaching the speaker to an electronic device such as a mobile phone, even
if the pressing size of the speaker is set large or the electronic device such as a mobile phone is
dropped by mistake, the stopper is It does not deform or crush, and does not exceed the
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reversible limit value of the spring pressure of the metal terminal as the terminal, and the spring
pressure of the terminal does not decrease.
[0020]
For this reason, the terminal can always maintain a strong spring pressure, and the contact
coupling with the set feeding portion is stabilized, and no contact failure occurs even when the
set is shocked or vibrated. Stabilize the signal without interruption.
Therefore, the reliability of the electronic device such as a mobile phone can be improved.
[0021]
In addition, about the above-mentioned protector, it is often used for this kind of electroacoustic
transducer, and is a vibration component from the external impact etc. of the electroacoustic
transducer used for electronic devices, such as a mobile telephone. Parts provided for the
protection of
[0022]
As described above, the present invention controls the bending range of the terminal by forming
the stopper of the terminal by extending at least a part of the end of the protector.
According to this configuration, the stopper receives a force in a substantially perpendicular
shape with respect to the pressure deformation and the impact force, so that the stopper has a
strong resistance to deformation and has a strong impact resistance. Therefore, the terminal can
perform its function without deformation or breakage of the stopper itself, so that the terminal
does not exceed the reversible limit value of the spring pressure of the metal terminal of the
terminal, and the terminal A strong spring pressure can always be maintained, and the contact
coupling of the electronic device with the feeding portion is stabilized, and no contact failure
occurs even when the electronic device is shocked or vibrated. Stabilize without interruption.
Therefore, the reliability and the quality of the electronic device such as the mobile phone can be
improved.
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[0023]
Furthermore, since the protector is configured to substitute for that role, there is no need to add
a separate part, and the number of parts can be reduced, thereby achieving cost reduction. it can.
[0024]
Hereinafter, embodiments of the present invention will be described using the drawings.
[0025]
First Embodiment The first to third aspects of the present invention will be described with
reference to the first embodiment.
FIGS. 1 to 3 show a speaker which is an electro-acoustic transducer according to an embodiment
of the present invention, and show an example in which the external shape is applied to a
rectangular type slim speaker.
[0026]
FIG. 1 is a cross-sectional view of an electro-acoustic transducer according to an embodiment of
the present invention, and FIG. 2 is a cross-sectional view of the terminal in FIG. 1 in the state
where the bottom dead center is reached by protecting a stopper.
FIG. 3 is a perspective view of the speaker in FIG.
[0027]
As shown in FIG. 1 to FIG. 3, the magnetized magnet 21 is sandwiched between the upper plate
22 and the yoke 23 to constitute an inner magnetic type magnetic circuit 24. The magnetic
circuit 24 is press-fit to the resin frame 26 in which a part of the terminal 30 is molded while
being in contact with the yoke 23 of the magnetic circuit 24 and bonded by bonding.
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[0028]
Then, a diaphragm 27 is adhered to the peripheral portion of the frame 26, a voice coil 28 for
driving the diaphragm 27 is coupled to the diaphragm 27, and the voice coil 28 is coupled so as
to fit in the magnetic gap 25. There is. On the other hand, the protector 29 is coupled to the
frame 26 so as to cover the front surface of the diaphragm 27.
[0029]
The lead wire of the voice coil 28 is soldered and coupled to one end of the terminal 30. Finally,
the substantially central portion of the terminal 30 is folded in two so that the terminal 30 does
not protrude outside from the outer dimensions of the frame 26, and the other end is configured
as a power supply terminal to the system side. doing.
[0030]
Here, the protector 29 extends a part of the end portion of the protector 29 in order to substitute
for the role as the stopper 29 a within the range where the bending of the metal plate of the
terminal 30 does not exceed the reversible limit value of the metal material. The height of the
stopper 29a is adjusted to control the bending range of the terminal 30.
[0031]
The shape of the protector 29 is formed to cover the diaphragm 26. When the speaker is
attached to an electronic device such as a mobile phone, which is the original purpose, by the
protector 29, external protectors are used. Protection of the vibrating parts of the electroacoustic transducer of
Furthermore, by adjusting the height of the stopper 29 a of the protector 29 as a stopper for
controlling the bending range of the terminal 30, protection of the terminal 30 can be realized.
Therefore, both the original purpose and the effect as the stopper 29a of the terminal 30 can be
exhibited, and the value is high.
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[0032]
In particular, since the function and effect as the stopper 29 a are formed by extending a part of
the end portion of the protector 29, external impact force from the electronic circuit which is a
feeding portion of an electronic device such as a mobile phone is generated. Since the force is
received in a substantially right-angled shape, the impact resistance is improved. Therefore,
reduction in the number of parts can also be implemented by achieving common use with the
original purpose, and cost reduction can also be realized thereby.
[0033]
Although the present embodiment has been described with respect to the inner magnet type
magnetic circuit 24, the present invention is not limited to this, and may be applied to an
electroacoustic transducer having an outer magnet type magnetic circuit.
[0034]
The material of the protector 29 is desirably formed of a polymer material.
The reason for this is that, by absorbing an excessive force due to a drop impact or the like to
protect the speaker and having a large restoring force, it can withstand multiple drop impacts or
the like.
[0035]
With this configuration, when the speaker is attached to an electronic device such as a mobile
phone, the terminal 30 is bent to some extent and maintained in a state in which an appropriate
spring pressure is applied to the electronic circuit which is a feeding portion on the electronic
device side such as a mobile phone. Be done. Then, even if the speaker is firmly pressed and
mounted, the stopper 29 a hits and the terminal 30 can not move any more. In addition, even if
an electronic device such as a mobile phone is dropped accidentally and an excessive impact
force is applied to the terminal 30, the deformation of the metal material exceeding the
reversible limit value may be generated or crushed by the effect of the stopper 29a. There is no
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[0036]
Therefore, the spring pressure of the metal terminal of the terminal 30 does not exceed the
reversible limit value, the spring pressure of the terminal 30 does not decrease, and the terminal
30 can always maintain a strong spring pressure. The contact coupling with the power supply
unit of the electronic device is stabilized, and no contact failure occurs even when the electronic
device is impacted or vibrated, so that the signal is stabilized without interruption.
[0037]
Moreover, as another embodiment, it is desirable that the material of the protector 29 be formed
of a metal material.
The reason for this is that even if an excessive force is applied due to a drop impact or the like, it
can withstand multiple drop impacts or the like without breaking or breakage, and environmental
resistance such as thermal shock or chemical resistance Because it is excellent.
[0038]
Furthermore, it is desirable that the stopper 29a of the protector 29 be provided with a
reinforcing rib 29b. The reason for this is that even if an excessive force is applied due to a drop
impact or the like, the impact resistance is further improved by the effect of the reinforcing rib
29b and the spring pressure of the metal terminal of the terminal 30 does not exceed the
reversible limit value. , And the terminal 30 can be protected securely. From the above reasons,
the reliability of an electronic device such as a mobile phone can be improved.
[0039]
Second Embodiment The invention according to the fourth aspect of the present invention will be
described below with reference to a second embodiment. FIG. 4 is a cross-sectional view of a
loudspeaker according to an embodiment of the present invention. Only the difference from the
first embodiment will be described.
[0040]
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As shown in FIG. 4, an insulator 29 c is formed on the stopper 29 a of the protector 29. With this
configuration, even if the stopper 29a of the protector 29 made of a metal material comes into
contact with the electronic circuit which is the power feeding portion of the electronic device by
the impact force, the short does not occur and the safety can be further improved. Therefore, the
reliability and safety of electronic devices such as mobile phones can be further improved.
[0041]
Third Embodiment The third embodiment of the present invention will be described below in
particular for the sixth aspect of the present invention. 5 and 6 show cross-sectional views of the
main parts of a mobile phone which is an electronic device according to an embodiment of the
present invention. As shown in FIGS. 5 and 6, the cellular phone 80 is configured by mounting
the speaker 35 according to any one of claims 1 to 5.
[0042]
As shown in FIG. 5, as the configuration of the mobile phone 80, components such as the speaker
35, the electronic circuit 40, and the display module 60 such as liquid crystal, modules and the
like are mounted inside the outer case 70. It constitutes the main part. Then, contact pressure is
supplied to the terminal 30 of the speaker 35 and the electronic circuit 40 while applying spring
pressure to operate the speaker 35.
[0043]
With this configuration, when attaching the speaker 35 as shown in FIG. 6 to the mobile phone
80, the pressing size of the speaker 35 is set large or the mobile phone 80 is dropped
accidentally, and an excessive impact force is applied to the terminal 30. Even if is added, the
terminal 30 is not permanently deformed or crushed by the effect of the stopper 29a. Therefore,
the spring pressure of the metal terminal of the terminal 30 will not exceed the reversible limit
value, and the spring pressure of the terminal 30 will not decrease.
[0044]
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Therefore, the terminal 30 can always maintain a strong spring pressure, and the contact
coupling with the power supply portion of the electronic circuit 40 of the mobile phone 80 is
stabilized, and even when the mobile phone 80 is shocked or vibrated, Since no contact failure
occurs, the signal can be stabilized without interruption. Therefore, the reliability and the quality
of the electronic device such as the mobile phone can be improved.
[0045]
The electro-acoustic transducer and the electronic device according to the present invention can
be applied to electronic devices such as audiovisual devices, information communication devices,
game devices and the like which require improvement in reliability and quality.
[0046]
Cross-sectional view of the speaker in one embodiment of the present invention Cross-sectional
view of the speaker in one embodiment of the present invention cross-sectional view of the
speaker in one embodiment of the present invention cross-sectional view of the speaker in one
embodiment of the present invention Cross-sectional view of the main part of the electronic
device in one embodiment Cross-sectional view of the main part of the electronic device in one
embodiment of the present invention Cross-sectional view of the conventional speaker Crosssectional view of the conventional speaker Cross-sectional view of the conventional speaker
Principal part sectional view of equipment Principal part sectional view of conventional
electronic equipment
Explanation of sign
[0047]
21 magnet 22 upper plate 23 yoke 24 magnetic circuit 25 magnetic gap 26 frame 27 diaphragm
28 voice coil 29 protector 29a stopper 29b reinforcement rib 29c insulator 30 terminal 35
speaker 40 electronic circuit 60 display module 70 exterior case 80 mobile phone
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