JP2017522801

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DESCRIPTION JP2017522801
Abstract: The present invention provides a bone conduction speaker module capable of compact
and stable sound output, and an earphone provided with the bone conduction speaker module. A
bone conduction speaker module includes a housing including a first case covering a portion in
contact with a human body and a second case covering the other side of the first case, and a
magnet unit provided inside the housing. It is comprised from the voice coil part located in the
upper part of the said magnet part. [Selected figure] Figure 3
Bone conduction earphone comprising bone conduction speaker module and bone conduction
speaker module
[0001]
The present invention relates to a bone conduction speaker module and a bone conduction
earphone provided with the bone conduction speaker module, and more particularly, not only
can minimize distortion of an input signal to accurately output sound but also cause less
vibration. However, it is possible to output a stable sound, and by using the vibration transmitted
to the user to minimize, not only can it be used in an easy state, but also the influence of the
magnetic force of the internally provided magnet on the user In addition to being easy to wear, it
is structured in in-ear type to minimize the burden on the body even if used over a long period of
time by minimizing The present invention relates to a bone conduction speaker module capable
of preventing a safety accident that can occur due to the inability to hear external sounds and a
bone conduction earphone provided with the bone conduction speaker module. That.
[0002]
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In general, there are two ways in which a person can hear sound, such as an air conduction
system and a bone conduction system.
Of these, the air conduction system is a system in which the sound is transmitted to the inner ear
canal through the tympanic membrane, and the vibration of the sound transmitted through the
air is transmitted to the tympanic membrane in the ear, and the inside of the tympanic
membrane is normally used. Vibration is transmitted to the "cochlea" through the three bones
located at Therefore, the cochlea (cochlea) is filled with a fluid called lymph fluid, and the
vibration of this fluid is converted to an electrical signal and transmitted to the auditory nerve,
whereby the human brain recognizes the sound.
[0003]
On the other hand, in the bone conduction system, sound is transmitted to the cochlea via the
skull (cranial bone) and transmitted to the brain via the auditory nerve, and in the sound
recognition mechanism, vibration is located in the tympanic membrane and the tympanic
membrane. The process of passing through two bones is omitted. That is, even if a deaf person
with an abnormality in the tympanic membrane or the ear tibial bone is transmitted to the skin if
the cochlear and auditory nerve are normal, by transmitting the acoustic vibration added to the
skin surface around the ear directly to the cochlea via the skull. It is possible to hear a clear
sound by bone conduction through the.
[0004]
On the other hand, in the case of air conduction type earphones and headphones, there is an
increased risk of safety accidents because the ear is blocked and used, and there is an increase in
the risk of safety accidents. It is legally regulated that it can not listen to music etc. on the road
wearing type earphones and headphones.
[0005]
Moreover, in recent years, the dreadful spread of digital sound and communication devices has
increased stuttering deafness in adolescents worldwide, and over 10% of the population
complains of deafness, and the increase in senile deafness in the global aging age As a matter of
fact, it is a fact that, as a matter of social concern, it is suggested to reduce the volume of the
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received speaker or to reduce the usage time.
Therefore, the bone conduction speaker can receive safety noises at the same time by opening
and using the ear at the same time in the case of ordinary people, so that safety accident can be
prevented and the bone conduction can be performed without directly affecting the tympanic
membrane. The principle is used to prevent deafness.
[0006]
In addition, when the structure of a general bone conduction speaker is such that the vibration
width is increased each time the volume is increased by configuring the configuration of the
vibrator outside the speaker housing in order to improve the output of the speaker, at the time of
use, The phenomenon that the human body is stiffened is increased, and some users have
problems such as dizziness and headache during long-term use.
[0007]
In addition, bone conduction speakers have less plating ability to reproduce stereo sound, and
because of general mono sound, there is a fatal technical limit despite the advantage of bone
conduction.
Therefore, although it is widely used for audio using stereo (stereo), there are serious problems
with quality.
[0008]
As an example of a speaker using such bone conduction, there is a technology described in
Korean Patent No. 10-0770590 as shown in FIG. 1 and FIG. 2. As a technical feature of the
speaker 300, the speaker 300 includes a cylindrical first magnet 301, a cylindrical second
magnet 302 configured to be spaced apart from the first magnet 301 by a predetermined
distance, and the first magnet 301. A cylindrical pole piece 303 configured to be spaced inwardly
at a predetermined distance, a lower plate 304 for guiding magnetic flux while supporting the
rear ends of the first magnet 301, the second magnet 302 and the pole piece 303, and A donutshaped first upper plate 305 configured at the upper end of the single magnet 301; and a donutshaped second upper plate 306 configured at the upper end of the second magnet 302 while
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being outside the first upper plate 305; A disc-shaped third upper plate 307 formed on the upper
end of the pole piece 303 while being inside the first upper plate 305, and the first magnet A
cylindrical first vibrating coil 308 that vibrates in a first vibrating space 301a formed between
the first 01 and the pole piece 303, a cylindrical first bobbin 309 on which the first vibrating coil
308 is wound, and A cylindrical second vibration coil 310 vibrating in a second vibration space
302a formed between the first magnet 301 and the second magnet 302, and a cylindrical second
bobbin wound with the second vibration coil 310. 311, a first vibrating material 312 fixed to the
upper end of the first bobbin 309 and vibrating the vibration receiving body (generally, air) while
vibrating with the vibration of the first bobbin 309, and the second bobbin 311 A second
vibration material 313 which is fixed to the upper end and vibrates a body to be vibrated (which
may be bone or air) while vibrating with the vibration of the second bobbin 311, and the first
upper plate 30. In the upper end of the second upper plate 306 and a first doughnut-shaped
frame 314 configured to be fixed between the first bobbin 309 and the second bobbin 311 and
supporting the first vibrating material 312, and fixed to the upper end of the second upper plate
306. A doughnut-shaped second frame 315 fixed and supporting the second vibrating material
313 together with the first frame 314, and the second vibrating material 313 resiliently on the
first and second frames 314, 315 A supporting edge 316, 317, and a grill 318 covering a top of
the first frame 314 and having a plurality of open holes 318a formed thereon so that the
vibration of the first vibrating material 312 can be output to the front surface It features.
[0009]
However, the technology described in the above-mentioned patent 10-0770590 is that the sound
is reproduced by the bone conduction method, so that the tympanic membrane etc. is damaged
and the sound is stable even for the people who can not hear the sound by the air conduction
method. There is an advantage to be able to hear, but since the magnet provided inside is
provided at a position close to the body part, the specification and quantity of magnets are
increased in order to enhance the output of the speaker, so the human body has strong magnetic
force. In addition, the cost of the system is increased due to the complicated structure of
necessary parts required for the speaker, and the sound quality is degraded during the
reproduction of the sound.
[0010]
In addition, since such bone conduction speakers are output about 50 to 60% lower in volume
and sound quality than existing air conduction type headphones, the reception rate is
significantly reduced in an external noisy environment and the sound is clearly There is a
problem that is difficult to receive.
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Also, as described above, since the bone conduction speaker has a low output, if another
amplifier is used to compensate for this and increase the output, the vibration due to
amplification becomes large, so the vibration is transmitted to the user, There is a problem that
use is inconvenient due to the impact due to the shock, so that there is a problem that the sound
is transmitted to the outside as it is and the noise is generated around it.
[0011]
In addition, since the conventional bone conduction speaker has to have another high elastic
supporting portion to be worn on the head, not only the total bulk increases but also storage is
not easy and the comfort is not good There are problems such as
[0012]
Specification of Korean Patent No. 10-0770590
[0013]
The present invention has been devised to solve the problems as described above, and an object
of the present invention is to provide a voice coil portion and a magnet portion inside a first case
and a second case which form the outside. The sound is reproduced, and the coil support portion
supporting the voice coil portion is formed in a bar shape, and only one side end portion of the
coil support portion is fixed so that the voice coil portion vibrates freely. By so doing, not only
can the attenuation by the coil support be minimized and the input signal be accurately
embodied without distortion, but stable sound can be output even with a small amount of
vibration, and another diaphragm can be used. It is an object of the present invention to provide
a bone conduction speaker module capable of outputting a sound that may not be provided and a
bone conduction earphone provided with the bone conduction speaker module.
[0014]
And the other end of the present invention is that the end of the coil supporting part to which the
voice coil part is attached is fixed to the end of the first supporting projection protruding on the
inner side surface of the second case, the first supporting The protrusion is connected only to the
second case and the lower end, and by transmitting the vibration of the voice coil transmitted
through the coil support to the second case without attenuating as much as possible, sound can
be stably generated even with a small amount of vibration. The bone conduction speaker module
and the bone conduction speaker which can be used easily and can be used easily because the
amplitude is not large so that the user can feel only very minute vibration even in direct contact
with the user It is providing a bone conduction earphone provided with a module.
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[0015]
Still another object of the present invention is to minimize the configuration provided inside the
first case and the second case, thereby minimizing distortion of the vibration generated by the
voice coil due to the coupled portion of each configuration. Noise so that the received signal can
be output more accurately and sound leakage to the outside can be minimized so that the
surrounding people can not hear it, noise pollution can be reduced. A bone conduction speaker
module and a bone conduction earphone comprising the bone conduction speaker module.
[0016]
Further, according to still another object of the present invention, the magnet unit provided in
the lower part of the voice coil unit is attached to a second case provided on the other side of the
first case in contact with the human body, and the magnet unit comprises a permanent magnet A
bone conduction speaker module comprising a magnet and a magnet cover provided on the
outside of the magnet and minimizing the influence of the magnetic force of the magnet on the
user so that the body is not burdened even if used for a long period of time And providing a bone
conduction earphone provided with a bone conduction speaker module.
[0017]
Furthermore, still another object of the present invention is to form an in-ear type in which the
insertion portion to be inserted into the external auditory canal is formed on one side of the main
body forming the bone conduction earphone, thereby another pressure supporting portion at the
time of wearing The external sound can be heard well even when worn in the in-ear type by
forming a through hole in the insertion portion to communicate with the upper portion of the
main body so that the insertion portion can be easily worn without providing It is an object of the
present invention to provide a bone conduction speaker module including the bone conduction
speaker module and the bone conduction speaker module capable of preventing the occurrence
of a safety accident without hearing an external sound.
[0018]
Still another object of the present invention is to provide a module unit for generating sound on
the side of the through hole penetrating the main body forming the bone conduction earphone
and the insertion unit, and the through hole and the module unit communicate with each other. A
part of air conduction sound generated by bone conduction vibration generated in the module
part is communicated to the tympanic membrane by the air conduction method, and the
communication part is provided with a filter and flows into the through hole from the outside To
prevent the foreign object from flowing into the module unit, thereby preventing the generation
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of noise due to the foreign object when reproducing sound in the module unit, and transmitting
the bone conduction and air conduction sound sources without loss. It is an object of the present
invention to provide a bone conduction earphone provided with a bone conduction speaker
module and a bone conduction speaker module capable of reproducing better sound quality.
[0019]
The present invention for solving such problems is a bone conduction speaker module for use in
earphones, headphones, and hearing aids, which covers a first case covering a portion in contact
with the human body and the other side of the first case. A second case, a magnet unit provided
inside the housing, and a voice coil unit located above the magnet unit.
Here, the voice coil portion is attached to a lower portion of a bar-shaped elastic support portion,
and only one end portion of the elastic support portion is fixed to the inside of the housing.
The second case may be formed with a first support protrusion projecting inward, and one end of
the elastic support portion may be fixed to an end of the first support protrusion.
Meanwhile, the magnet unit includes a magnet made of a permanent magnet and a magnet cover
provided on the outside of the magnet.
Here, the magnet cover is provided with a mounting portion to which the magnet is mounted,
and the mounting portion is formed to be open in the direction of the second case.
At this time, a second support protrusion is formed inside the second case, and a magnet support
portion to which a magnet portion is attached is provided at an upper end of the second support
protrusion.
And, a fixing projection for fixing the magnet unit is provided in a protruding manner on the
magnet support unit.
On the other hand, a first joint portion and a second joint portion are respectively formed at
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portions in contact with the first case and the second case, and a coupling groove is formed along
the inner circumferential surface at the first joint portion. The second connecting portion is
characterized in that a connecting protrusion corresponding to the connecting groove is formed
along the outer peripheral surface.
The first case may further include a silicon sheet at a portion in contact with the human body.
The present invention also relates to a bone conduction earphone including the bone conduction
speaker module having the above-described configuration, wherein the module part including the
bone conduction speaker module, a main body having the module part formed on one side
thereof, and a module part of the main body And an insertion part formed on the other side
lower part formed. Here, the insertion portion and the main body may be formed with through
holes vertically penetrating to communicate with each other. At this time, a communication part
communicating with the module part is formed on the side of the through hole. The
communication unit may include a filter.
[0020]
According to the present invention of the above configuration, the voice coil unit and the magnet
unit are provided inside the first case and the second case forming the outside to reproduce the
sound, and the coil support unit supporting the voice coil unit It is formed in a bar shape, and the
voice coil portion is freely vibrated so that only one side end portion of the coil support portion is
fixed, thereby minimizing the attenuation by the coil support portion and inputting the signal. In
addition to accurate implementation without distortion, stable sound can be output even with a
small amount of vibration, and it is possible to output a good sound without providing another
diaphragm.
[0021]
Further, according to the present invention, the end of the coil support to which the voice coil
portion is attached is fixed to the end of the first support projection protruding from the inner
side surface of the second case, and the first support projection is Only by the two cases and the
lower end, sound can be stably output even with a small amount of vibration by transmitting the
vibration of the voice coil transmitted through the coil support to the second case without
attenuating as much as possible. Not only that, but the amplitude is not large, it is possible for
the user to feel very fine vibrations only when in direct contact with the user, and to be used
easily.
[0022]
In addition, the present invention can be realized by minimizing the configuration provided inside
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the first case and the second case, thereby minimizing distortion of the vibration generated by
the voice coil due to the coupled portion of each configuration. Noise can be more accurately
output, and noise leakage to the outside can be minimized so that the surrounding people can not
hear it, thereby reducing noise pollution.
[0023]
Further, according to the present invention, the magnet unit provided in the lower part of the
voice coil unit is attached to the second case provided on the other side of the first case in
contact with the human body, and the magnet unit is a magnet consisting of a permanent magnet
and the magnet It consists of a magnet cover provided on the outside, and by minimizing the
influence of the magnet's magnetic force on the user, it has the effect of not giving a burden on
the body even when used for a long period of time.
[0024]
Further, the present invention does not need to have a separate pressure support at the time of
wearing by forming an in-ear type in which the insertion portion to be inserted into the ear canal
is formed on one side of the main body forming the bone conduction earphone. By making it
possible to wear easily and forming a through-hole in the insertion portion so as to communicate
with the upper part of the main body, it is possible to hear an external sound well even when
worn in the in-ear type. There is an effect that it is possible to prevent the occurrence of a safety
accident without hearing the external sound.
[0025]
Further, according to the present invention, the main body forming the bone conduction
earphone and the side portion of the through hole penetrating the insertion portion are provided
with a module unit generating sound, and the through hole and the module unit communicate
with each other through the communication unit. And a part of air conduction sound generated
by bone conduction vibration generated in the module part is transmitted to the tympanic
membrane by the air conduction method, the communication part is provided with a filter, and
the foreign matter flowing into the through hole from the outside is the module part By
preventing it from flowing into the module, preventing the generation of stuttering by foreign
objects when reproducing sound in the module section, and transmitting sound sources of bone
conduction and air conduction without loss to reproduce better sound quality There are effects
that can be done.
[0026]
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It is an exploded perspective view of the conventional bone conduction headphone.
It is sectional drawing of the conventional bone conduction headphone.
1 is a perspective view of a bone conduction speaker module according to the present invention.
FIG. 1 is an exploded perspective view of a bone conduction speaker module according to the
present invention.
FIG. 2 is a cross-sectional view of a bone conduction speaker module according to the present
invention.
It is a graph which shows the output according to frequency of a general bone conduction
speaker.
Fig. 5 is a graph showing the frequency-specific output of the bone conduction speaker module
according to the present invention. FIG. 6 is a cross-sectional view of a state in which the depth
of the magnet mounting portion of the magnet cover is shallow in FIG. 5 and the magnet is
formed to project from the magnet mounting portion. FIG. 1 is a perspective view of a bone
conduction earphone provided with a bone conduction speaker module according to the present
invention. FIG. 5 is a cross-sectional view of a bone conduction earphone provided with a bone
conduction speaker module according to the present invention. FIG. 6 is a cross-sectional view of
a bone conduction earphone provided with a bone conduction speaker module provided with a
plug for sealing a through hole according to another embodiment of the present invention; FIG. 6
is a cross-sectional view of a bone conduction earphone provided with a bone conduction
speaker module according to another embodiment of the present invention.
[0027]
Hereinafter, preferred embodiments of the present invention will be described in more detail
with reference to the attached drawings. The same reference numerals are given to the same
components in the drawings, and redundant description of the same components is omitted. And,
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it should be understood that the present invention can be embodied in many different forms and
is not limited to the described embodiments.
[0028]
3 is a perspective view of a bone conduction speaker module according to the present invention,
FIG. 4 is a separated perspective view of a bone conduction speaker module according to the
present invention, FIG. 5 is a cross sectional view of a bone conduction speaker module
according to the present invention, and FIG. FIG. 7 is a graph showing the output by frequency of
the conductive speaker, FIG. 7 is a graph showing the output by frequency by the bone
conduction speaker module according to the present invention, FIG. 8 is FIG. FIG. 9 is a
perspective view of a bone conduction earphone provided with a bone conduction speaker
module according to the present invention, and FIG. 10 is a bone conduction earphone provided
with a bone conduction speaker module according to the present invention FIG. 11 is a bone
conduction ear provided with a bone conduction speaker module provided with a plug for closing
a through hole according to another embodiment of the present invention. Sectional view of
emissions, FIG. 12 is a sectional view of the bone conduction earphone having a bone conduction
speaker module according to another embodiment of the present invention.
[0029]
The present invention relates to a bone conduction speaker module including a bone conduction
speaker module and a bone conduction speaker module provided in an earphone, a headphone, a
hearing aid, etc. for reproducing sound, and the bone conduction speaker module is first
examined. As shown in FIG. 3 to FIG. 5, the structure comprises a housing and a voice coil
portion 130 and a magnet portion 140 provided inside the housing.
Here, the housing 100 includes a first case 110 formed to cover a portion in contact with a
human body, and a second case 120 covering the other side of the first case 110, and the first
case 110. The shape of the second case 120 may be formed in various shapes according to
applications such as earphones, headphones, or a hearing aid.
[0030]
The first case 110 and the second case 120 are detachably connected. A first coupling portion
116 and a second coupling portion 126 are respectively formed at portions where the first case
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110 and the second case 120 are in contact, and the first coupling portion 116 of the first case
110 is coupled along an inner circumferential surface A groove 118 is formed, and the second
coupling portion 126 of the second case 120 is formed with a coupling protrusion 128
corresponding to the coupling groove 118 along the outer circumferential surface. Therefore,
since the coupling protrusion 128 of the second coupling portion 120 is inserted and fixed in the
coupling groove 118 of the first coupling portion 116, the first case 110 and the second case
120 are rigidly coupled and unintended separation Will prevent.
[0031]
Meanwhile, the voice coil unit 130 provided inside the housing 100 includes a bobbin 132 and a
voice coil 134 wound around an outer peripheral surface of the bobbin 132. The voice coil
portion 130 is attached to the lower portion of the elastic support portion 122 having high
elastic force, and the elastic support portion 122 is formed in a bar shape, and is fixed to only
one side end inside the housing 100. Here, a first support protrusion 121 is formed in the second
case 120 covering one side of the housing 100 so as to protrude inward. The upper end of the
first support protrusion 121 is fixed to one end of a resilient support 122 on which the voice coil
130 is resiliently supported.
[0032]
At this time, the elastic support portion 122 may have a third coupling portion 122 a formed at
an end thereof connected to the first support projection 121, which may be adhesively fixed to
the end of the first support projection 121, or Alternatively, the vibration generated in the voice
coil portion 130 is transmitted to the housing 100 via the elastic support portion 122 and the
first support projection 121 by being rigidly fixed with a screw, a nail or the like, and thus
transmitted. Is transmitted to the body part of the user in contact with the housing 100. Also,
since the resilient support portion 122 is formed in a bar shape and fixed only at one side end, it
can freely vibrate. Therefore, when the voice coil unit 130 is vibrated by the signal applied to the
voice coil unit 130 provided at the lower part, the force for reducing the vibration force is
minimized, so that the applied signal can be accurately reproduced. Also, since the reduction of
the signal is minimized, the sound can be output stably even if the output is low.
[0033]
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That is, conventionally, as shown in FIG. 1 and FIG. 2, the vibrating material 312 provided on the
upper end of the bobbin is formed in a disk shape, and the whole outer peripheral surface is
fixed. When the bobbin vibrates, the vibration force is reduced by a certain degree or more,
which makes it difficult not only to reproduce the signal accurately, but also to reduce the output
and reduce the output. The spring support 122 to which the coil unit 130 is attached is formed
in a bar shape, and only one side end is fixed, so that it can freely vibrate, minimize the reduction
of the signal, and accurately output the signal. Not only can it increase output. Therefore,
conventionally, the output is increased by an amplifier or the like separately for the reduction of
the output. In this case, the output increases but the amplitude increases. Therefore, if the user
brings the bone conduction speaker into contact with the body, the vibration of the bone
conduction speaker is transmitted to the user as it is, and there is a problem that the bone
conduction speaker is difficult to use due to the vibration. On the other hand, according to the
present invention, since the degree of attenuation is minimized at the elastic support portion
122, it is not necessary to use another amplifier, and the amplitude is not increased thereby,
thereby minimizing vibration when reproducing sound. Even when the user touches the speaker
equipped with the bone conduction speaker module according to the present invention, the user
feels only minute vibration and can use it in a comfortable state for a long time.
[0034]
In addition, since the vibrating amplitude of the voice coil unit 130 is not large, the sound can be
stably prevented from leaking to the outside, and even if there is a person in the periphery, the
person can not feel the sound, It has the effect of preventing you from feeling inconvenience due
to the sound. The first case 110 further includes a silicon sheet 114 at a portion in contact with
the user's body, and the first case 110 is formed with a sheet attachment recess 112, to which
the silicon sheet 114 is attached. Therefore, since the silicon sheet 114 is in contact with the
user's body, it is not only comfortable for the user but also does not burden the body even if used
for a long time. That is, since the bone conduction speaker is in contact with the user's body to
transmit the sound, the speaker unit is pressed in the direction of the user's body by the
separately provided wearing part (not shown). At this time, if pressure is sustained, it will put a
burden on the body. However, according to the present invention, by providing the silicon sheet
in the part in contact with the body, the part that presses the body is softened, so that it can be
used comfortably even over a long period of time.
[0035]
Meanwhile, the magnet unit 140 includes a magnet 142 made of a permanent magnet and a
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magnet cover 144 provided on the outside of the magnet 142. The magnet unit 140 is attached
to the second case 120 located on the other side of the first case 110 in contact with the user's
body so that the magnetic force emitted from the magnet 142 minimizes the influence on the
user. . In addition, the magnet cover 144 is provided with a magnet mounting portion 145 to
which the magnet 142 is mounted, the magnet mounting portion 145 is formed so that one side
is open, and the open portion is the second case 120 where the user is not located. Because it is
open in the direction, the magnet cover 144 reduces the magnetic force emitted to the user side,
minimizing the adverse effect of the user on the magnetic force, and thus the earphone or
headphone on which the bone conduction speaker module of the present invention is mounted.
Etc. can be used stably over a long period of time. At this time, the magnet cover 144 is made of
brass, aluminum or SUS (Steel Use Stainless), and as described above, by weakening the magnetic
force emitted from the magnet 142, the user is less likely to be adversely affected by the
magnetic force. Come to
[0036]
On the other hand, in the magnet cover 144, as shown in FIG. 8, the depth of the magnet
mounting portion 145 formed on the magnet cover 144 is smaller than the thickness of the
magnet 142, so that It can also be formed to protrude to the outside. A second support
protrusion 123 is formed at a predetermined interval inside the second case 120, and a magnet
support portion 124 is provided at an upper end of the second support protrusion 123. The
second support protrusion 123 may be attached in various numbers according to the size and
shape of the second case 120 to stably support the magnet support portion 124. Here, the
magnet support portion 124 is formed in a plate shape, and the fixing protrusions 125 are
formed on the upper surface at predetermined intervals, thereby firmly fixing the magnet portion
140. Therefore, the voice coil unit 130 is vibrated by the magnetic force generated according to
the signal applied to the voice coil unit 130 and the magnetic force generated by the magnet unit
140, thereby generating a sound.
[0037]
Also, the magnet support portion 124 can be made of synthetic resin by a method such as
injection molding, and can also be made of a highly elastic metal material. When it is made of a
highly elastic metal material, not only the signal can be more accurately reproduced by vibrating
the magnet support portion 124 corresponding to the magnetic force generated in the voice coil
portion 130, but the magnet portion 130 Since it is firmly connected to the magnet support 124
made of a metal material by the attraction of the magnet 142, it can be attached more easily.
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[0038]
Meanwhile, a vibration space is formed between the magnet unit 140 and the voice coil unit 130
so that the voice coil unit 130 can freely vibrate. The vibration space may be adjusted in size
according to the standard of the magnet 142, the impedance of the voice coil unit 130, the
elastic force of the elastic support 122, etc., so that the optimum volume and sound quality can
be reproduced. Further, another auxiliary space is formed below the magnet support portion 124
by the second support protrusion 123. Since the vibration generated by the voice coil unit 130
also vibrates in the auxiliary space, the output of the speaker is made higher. That is, when
compared with the resolution of the bass band of the conventional bone conduction speaker as
shown in FIG. 6, the present invention can reproduce the bass band closer to the original sound
as shown in FIG. Will also increase.
[0039]
On the other hand, when examining the bone conduction earphone 200 provided with the bone
conduction speaker module having the above-mentioned configuration, as shown in FIG. 9 and
FIG. 10, the module part 210 consisting of the above-mentioned bone conduction speaker
module It comprises a main body 220 in which the module part 210 is formed, and an insertion
part 230 formed in the lower part of the main body 220. Here, the insertion part 230 is formed
on the other side of the main body 220 where the module part 210 is formed. The insertion
portion 230 may be easily inserted into the ear canal of the user by being formed to be inclined
to one side.
[0040]
In addition, by further providing another sealing member (not shown) made of silicon or the like
on the outer side of the insertion portion 230, a state in which the sealing member is stably fixed
by the sealing member even if the size of the ear canal is different for each person Can be
maintained, and can be stably worn without providing a pressure support as in conventional
bone conduction headphones. At this time, the bone conduction earphone 200 of the present
invention is formed of upper and lower cases (the reference numerals are not shown) like the
first case 110 and the second case 120 of the bone conduction speaker module described above
to form the module part 210 inside. The module part 210 can be formed inside the main body
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220 in various ways other than that.
[0041]
On the other hand, the insertion portion 230 is formed with through holes 232 vertically formed
to communicate with the main body 220. Therefore, when the bone conduction earphone 200 of
the present invention is worn, the external sound is transmitted by the air conduction method
through the through hole 232 so that the external sound can be heard. Therefore, in the case of
the in-ear type, a safety accident can occur without being able to hear an external sound, but
such a safety accident can be prevented in advance. That is, conventionally, when the in-ear type
earphone is worn, the external sound is completely cut off, so that the vehicle approaches from
behind the wearer or recognizes it even if the horn sounds in the approaching vehicle In the
present invention, since the external sound can be heard by forming the through holes 232 in
the body 220 and the insertion portion 230 so as to communicate with the outside, such safety
can be avoided. It will be possible to prevent the accident. Of course, as shown in FIG. 11, another
plug 238 may be provided in the through hole 232 passing through the insertion portion 230
and the main body 220 to seal the through hole 232. This can be used when you want to
concentrate on the sound output from the earphone while blocking external stuttering in a safe
place.
[0042]
Meanwhile, the module part 210 is formed on one side inside the main body 220, and a through
hole 232 is formed on the other side where the module part 210 is formed. A communication
part 234 communicating with the module part 210 is formed on the side of the through hole
232. Therefore, since the sound generated in the module unit 210 is transmitted not only in the
bone conduction system but also in the air conduction system through the communication part
234 and the through hole 232, a clear sound can be heard without loss of the sound source. .
The communication portion 234 is provided with a filter 236, and external foreign matter
flowing in through the through hole 232 is prevented from flowing into the module portion 210,
so that foreign matter flowing into the module portion 210 generates noise. Will be able to
output more stable sound.
[0043]
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Meanwhile, according to another embodiment of the present invention, as shown in FIG. 12, an
auxiliary sealing member 240 is further provided on the side of the main body 220. A fixing hole
222 is formed on the side surface of the body 220, and a fixing protrusion 242 corresponding to
the fixing hole 222 is formed on the auxiliary sealing member 240, so that the auxiliary sealing
member 240 is detachably mounted on the side of the body 220. Therefore, when the user's
outer ear is large, when the bone conduction earphone 200 of the present invention is worn, a
large amount of space remains in the outer ear and the bone conduction earphone 200 shakes.
At this time, the auxiliary sealing member 240 may be coupled to the main body 220 to fill the
space, thereby preventing the bone conduction earphone 200 from shaking. The preferred
embodiment of the present invention has been described above, but the scope of the present
invention is not limited to this, and the scope of the present invention extends to a scope
substantially equivalent to the embodiment of the present invention. Various modifications can
be made by those skilled in the art to which the present invention belongs without departing
from the spirit of the present invention.
[0044]
DESCRIPTION OF SYMBOLS 100 .. Housing 110 1st case 120 2nd case 130 voice coil part 200
bone conduction earphone 210 module part 220 body 230 insertion part 240 · · Auxiliary
sealing member.
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