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DESCRIPTION JP2017521022

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DESCRIPTION JP2017521022
Abstract: To enhance the sound performance by enhancing the bass effect. A speaker module
includes a drive sound source including a vibration system including a diaphragm and a voice
coil and a magnetic path system, a passive sound source, and a protective frame accommodating
and fixing the drive sound source and the passive sound source. A front acoustic cavity is formed
between the upper side of the housing and the protective frame, and a rear acoustic cavity is
formed between the side close to the magnetic path system and the protective frame. The driving
sound source emits sound from the side, and the side of the protective frame is provided with a
sound emitting hole of the driving sound source connected to the front acoustic cavity, and the
passive sound source comprising the two passive radiators installed parallel to each other in
parallel is the rear acoustic chamber A cavity is formed between the two passive radiators, and
the divided sound waves on the side close to the magnetic path system are respectively
transmitted to the side away from the cavity, and the sound waves in the cavity are pushed out.
Emitted from the sound emission hole of the passive sound source to the outside. [Selected
figure] Figure 1
スピーカーモジュール
[0001]
The present invention relates to the technical field of electroacoustic conversion, and more
particularly to a speaker module capable of enhancing bass effect.
[0002]
16-04-2019
1
With the advancement of society and technology, terminal electronic devices are becoming
smaller in size and thinner in thickness, and micro-speaker modules are becoming smaller
accordingly, but consumer demand for product performance There is a growing demand,
especially for the audio bass effect.
Small speaker modules are limited in size and it is difficult to achieve the ideal bass effect.
[0003]
A typical speaker module comprises a single speaker and a plurality of housings provided
surrounding the single speaker. The speaker unit includes a vibration system including a
diaphragm and a voice coil, and a magnetic path system forming a magnetic gap for
accommodating the voice coil, and the vibration of the diaphragm is generated by the voice coil
to emit sound to the outside. By doing that, the sound goes into the human ear. A front acoustic
chamber and a rear acoustic chamber spaced apart from each other are formed between the
diaphragm and the housing, the front acoustic chamber and the sound emission hole of the
module are in communication, and the rear acoustic chamber is generally sealed Configuration.
Usually, the larger the size of the rear acoustic cavity, the better the bass effect, but because the
space of the module is limited, it is difficult to achieve the expected bass effect.
[0004]
Therefore, it is necessary to provide a speaker module which can solve the above-mentioned
subject.
[0005]
SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a
speaker module that can fully utilize the internal space to enhance the bass effect and thereby
improve the acoustic performance of the product in a speaker module with a limited size.
[0006]
In order to solve the above problems, a speaker module provided by the present invention
includes a drive sound source including a vibration system including a diaphragm and a voice
coil, and a magnetic path system forming a magnetic gap for accommodating the voice coil; A
sound source, and a protective frame for accommodating and fixing the driving sound source and
the passive sound source, wherein a front acoustic cavity is formed between the upper side of the
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2
diaphragm and the protective frame, and a magnetic path of the diaphragm A speaker module
forming a rear acoustic cavity between a side close to a system and the protective frame, wherein
the driving sound source emits sound from the side, and the driving sound source is connected to
the front acoustic cavity on the side of the protective frame The passive sound source is provided
in the aft acoustic cavity and provided with two passive radiators disposed opposite to each
other. The brailator is installed in parallel, and between the two passive radiators is enclosed to
form one cavity, and the sound wave of the side of the diaphragm adjacent to the magnetic path
system is divided into two, respectively The sound is transmitted to the side away from the cavity
of the two passive radiators, and the sound wave in the cavity is extruded and emitted from the
sound emission hole of the passive sound source to the outside.
[0007]
In addition, it is preferable that the sound emission hole of the driving sound source and the
sound emission hole of the passive sound source be separated from each other and be positioned
on the same side of the speaker module.
[0008]
Preferably, the cavity between the two passive radiators and the sound emitting hole of the
passive sound source are communicated by a sound conduit, and the sound conduit is
surrounded by the protective frame.
[0009]
Further, the protective frame includes an upper case, an intermediate case, and a lower case, the
upper case and the intermediate case accommodate the drive sound source, and the intermediate
case and the lower case are The passive sound source is accommodated, and the side of the
upper case facing the diaphragm, the side of the middle case facing the passive radiator, and the
side of the lower case facing the passive radiator are formed by injection molding. The structure
by which a metal plate is installed is preferable.
[0010]
The sound conduit is formed by coupling the middle case and the lower case, and a coupling rib
portion is installed on the side of the middle case opposite to the lower case, and the coupling rib
portion is the lower case. A configuration that is coupled to the body to form the sound conduit is
preferred.
[0011]
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3
Further, the number of sound emission holes of the passive sound source is two, which are
respectively located on both sides of the sound emission hole of the drive sound source, and an
opening connecting the cavity and the sound conduit is installed in the intermediate housing The
number of holes and the number of the sound conduits are both two, and it is preferable to be
connected to the sound emission holes of the two passive sound sources.
[0012]
Further, a steel plate is installed by injection molding on a portion of the outer wall of the sound
conduit facing the drive sound source, the number of steel plates is two, and the two outer plates
of the two steel plates and the middle case are integrated. It is preferable that the injection
molding be performed.
[0013]
Further, the two passive radiators have completely the same configuration, and the two passive
radiators include a diaphragm main body and a mass coupled to the diaphragm main body, and
the diaphragm main body is made of thermoplastic polyurethane. A configuration composed of
materials is preferred.
[0014]
Preferably, a mass of a tungsten steel alloy material is bonded to the upper and lower central
portions of the diaphragm main body.
[0015]
Further, the diaphragm of the drive sound source has a dome at the center and an edge at the
edge, and the site where the edge and the housing are connected is lower than the site where the
edge and the dome are connected. The configuration is preferred.
[0016]
By adopting the technical means as described above, the present invention places the passive
sound source in the rear acoustic cavity of the speaker module as compared with the
conventional configuration, and by the extrusion between the two passive radiators in the passive
sound source, The sound waves in the cavity between the two passive radiators can be emitted to
the outside, thereby enhancing the bass effect of the product and improving the acoustic
performance of the product.
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4
[0017]
Sectional view showing the configuration of the speaker module of the present invention
Sectional view showing the configuration of the driving sound source portion of the present
invention An enlarged view showing the configuration of part A of the speaker module of FIG.
The perspective view which shows the composition which removed the lower case from the
speaker module of the present invention
[0018]
Hereinafter, the present invention will be described in more detail by combining the drawings
and specific embodiments.
[0019]
In the following description, although several embodiments of the present invention will be
described through detailed descriptions, various modifications can be made to the embodiments
on the premise that they do not deviate from the spirit and scope of the present invention. Are
obvious to those skilled in the art.
Accordingly, the drawings and description are merely illustrative in nature and do not limit the
scope of protection of the claims.
Moreover, the same drawing code | symbol shows the same structure in this specification.
[0020]
The speaker module of the present invention comprises a driving sound source and a passive
sound source, and the passive sound source is specifically a passive radiator.
The driving sound source is a part capable of actively producing sound, and includes a vibration
system and a magnetic path system, the vibration system includes a diaphragm and a voice coil,
and a voice coil formed by the magnetic path system accommodates a magnetic gap The voice
coil vibrates in the vertical direction in the magnetic gap by the electric signal, and further
generates a sound by vibrating the diaphragm.
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5
The driving sound source is divided by the diaphragm into the front acoustic chamber and the
rear acoustic chamber, the upper side of the diaphragm is the front acoustic chamber, and the
front acoustic chamber communicates with the sound emission hole of the driving sound source.
Transmit the sound generated by the outside to the outside.
The space on the rear side of the diaphragm is a rear acoustic cavity of the driving sound source,
and the rear acoustic cavity is provided with a passive sound source.
The passive sound source of the present invention has two passive radiators installed in parallel
and opposite to each other, and one cavity surrounded by the two passive radiators becomes one
side, and the side close to the magnetic path system of the drive sound source diaphragm. The
sound wave is generated from the driving sound source and then divided into two parts, which
are respectively transmitted from the above-mentioned cavities of the two passive radiators to
the opposite side.
The two passive radiators extrude the cavity, and the air flow inside the cavity is emitted to the
outside through the sound emission hole of the passive sound source.
The present invention can improve the bass effect of the speaker module by fully utilizing the
space of the rear acoustic cavity and installing two passive radiators.
[0021]
FIG. 1 is a cross-sectional view showing the structure of the speaker module of the present
invention, and FIG. 2 is a cross-sectional view showing the structure of a driving sound source
portion of the present invention.
[0022]
As shown in FIGS. 1 and 2, the speaker module includes a drive sound source located on the left
side, a passive sound source located on the right side, and a protective frame that contains the
drive sound source and the passive sound source.
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Here, the protective frame includes an upper housing 11 located on the upper side (side
approaching the diaphragm), an intermediate housing 12, and a lower housing 13 located on the
lower side.
[0023]
The driving sound source is a portion capable of independently generating sound, and as shown
in FIG. 2, the driving sound source includes a vibration system and a magnetic path system, and
the vibration system includes the diaphragm 21 and the lower portion of the diaphragm 21. It
includes a voice coil 22 coupled to the side.
The magnetic path system comprises a spring washer 31, a magnet 32, and a frame 33, which
are sequentially coupled, and in the magnetic path system, a predetermined gap is formed
between the spring washer 31 and the outer surface of the magnet 32 and the side wall of the
frame 33. The gap is a magnetic gap.
The voice coil 22 is accommodated in the magnetic gap, and magnetic lines of force formed by
the magnetic path system pass through the voice coil 22.
The voice coil 22 is usually wound and formed by a conductive metal wire such as a copper-clad
aluminum wire, and when an electric signal is input to the voice coil 22, the force of amperes in
the magnetic field formed by the magnetic path system Receive
Since an alternating signal is input to the voice coil 22, the magnitude and direction of the
received amperage change in response to the signal.
The force of amperes causes the voice coil 22 to vibrate up and down in the magnetic gap.
Since the voice coil 22 and the diaphragm 21 are combined and integrated, the vibration of the
voice coil 22 can cause the diaphragm 21 to vibrate, thereby generating a sound.
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7
[0024]
The diaphragm 21 is provided with a flat dome portion 210 installed at the center and an edge
portion 211 located at the edge of the dome portion, and usually a rigid recombination layer is
coupled to the dome portion 210.
As shown in FIG. 2, the recombination layer has good rigidity and is lightweight, and by installing
the recombination layer, the high frequency characteristics of the diaphragm 21 can be
improved, and high frequency split vibration occurs in the diaphragm 21. Can be prevented. The
edge portion 211 and the dome portion 210 are connected to each other, and are arc-shaped and
flexible. The arc-shaped configuration prevents the diaphragm 21 from being pulled radically
when the diaphragm 21 vibrates in the vertical direction. The edge portion 211 in the present
embodiment is a downwardly recessed configuration, that is, a configuration in which it is
recessed toward the side close to the magnetic path system, and such a recessed configuration
under the edge portion 211 is a specific example of the speaker module. Were installed to match
the By avoiding the collision with the upper housing 11 and fully utilizing the space in the
module, the thickness of the drive sound source can be reduced and the overall size of the drive
sound source can be increased.
[0025]
The driving sound source is configured to emit a sound from the side, and the sound emission
hole 10 of the driving sound source is formed between the upper housing 11 and the middle
housing 12. As shown in FIGS. 1 and 2, the sound output hole 10 is located on the side of the
protective frame, and more specifically, is formed by the combination of the upper housing 11
and the middle housing 12. In order to expand the space of the sound emission hole 10 and
radiate the air flow of the driving sound source to the outside smoothly, there is a height
difference at both ends of the edge portion 211 of the present invention. That is, there is a height
difference d between the position where the edge portion 211 and the intermediate case 12 are
connected and the position where the edge portion 211 and the dome portion 210 are
connected. Specifically, as shown in FIG. 2, the position where the edge portion 211 and the
intermediate case 12 are coupled is low, and at the same time, the position near the upper case
11 of the intermediate case 12 is low, By increasing the distance between the upper housing 11
and the intermediate housing 12 on the diaphragm 21 side, the difference in height of the sound
emission holes 10 can be increased, and the acoustic radiation area can be increased.
16-04-2019
8
[0026]
The upper side of the diaphragm 21 is the upper case 11 in the protective frame, and the upper
case 11 includes a plastic body, and a metal plate 110 is installed at the center position of the
upper case 11 by injection molding. Since the metal material can satisfy the predetermined
strength as compared with the plastic material, the configuration in which the metal plate 110 is
installed on the upper housing 11 by injection molding can reduce the thickness of the speaker
module and at the same time As the inner space can be expanded, the size of the driving sound
source can be increased, and at the same time, the acoustic performance of the product can be
improved. The intermediate case 12 fixes the magnetic path system, and the upper case 11 and
the intermediate case 12 are fixedly coupled by adhesion or ultrasonic welding etc., and the drive
case is accommodated by the upper case 11 and the intermediate case 12 Fix it.
[0027]
The diaphragm 21 divides the space in the speaker module into a front acoustic chamber and a
rear acoustic chamber, and the front acoustic chamber is a space enclosed between the upper
side of the diaphragm 21 and the protective frame. The front acoustic chamber and the sound
emission hole 10 of the drive sound source can communicate with each other to emit sound to
the outside. However, not limited to such a configuration, the rear acoustic cavity and the sound
emission hole 10 of the drive sound source may be communicated. The aft acoustic cavity is an
acoustic cavity formed on the magnetic path system side of the diaphragm 21. The aft acoustic
cavity of the conventional configuration has a sealed configuration, but a passive sound source is
installed in the posterior acoustic cavity of the present invention ing.
[0028]
If it demonstrates based on FIG.1 and FIG.3, two passive radiators, the passive radiator 51 and
the passive radiator 52, are installed in the rear acoustic cavity of the speaker module of this
invention. The passive radiator 51 and the passive radiator 52 are installed in parallel, and the
two passive radiators are installed opposite to each other, and the space between the passive
radiator 51 and the passive radiator 52 is enclosed to form one cavity.
[0029]
In addition, although the passive radiator 51 and the passive radiator 52 of a present Example
16-04-2019
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are the completely same structures, they are not restricted to such a completely same structure.
[0030]
When a sound wave generated on the rear side (the side close to the magnetic path system) of
the drive sound source diaphragm 21 flows to the passive sound source, the side away from the
other of the passive radiator 51 and the passive radiator 52 (the side away from the cavity)
Flow), ie, the air flow is divided into two and flows respectively to the upper side of the passive
radiator 51 and the lower side of the passive radiator 52, and the air inside the cavity between
the two passive It is released to the outside through the hole.
Such a configuration in which the passive radiator is installed in the rear acoustic cavity can fully
utilize the space in the rear acoustic cavity, and uses sound waves in the rear acoustic cavity to
vibrate the passive radiator to make sound and to produce bass. Since it can be generated, the
bass effect of the entire module can be improved.
[0031]
The passive radiator 51 and the passive radiator 52 each include a diaphragm main body and a
mass coupled to the diaphragm main body, the diaphragm main body is made of a flexible
material, and the mass is usually made of a heavy metal material. Be done. Specifically, as shown
in FIG. 3, the passive radiator 51 includes a diaphragm main body 510 and a mass 511, and the
passive radiator 52 includes a diaphragm main body 520 and a mass 521. The materials of the
diaphragm main body 510 and the diaphragm main body 520 are both TPU (thermoplastic
polyurethane), and such a material has a good damper effect. By connecting a mass to the
diaphragm body, the weight of the passive radiator can be increased and the bass effect can be
enhanced. Further, since the internal space of the speaker module is narrow, it is preferable to
use a tungsten steel alloy material with high density for the mass 511 and the mass 521,
whereby the passive radiator can have a predetermined weight even if the mass is thin. The same
mass is preferably coupled to the upper and lower sides of the diaphragm main body, that is, one
mass 511 is coupled to the upper and lower sides of the diaphragm main body 510 and the
upper and lower portions of the diaphragm main body 520 One mass 521 is coupled to the side
to guarantee the weight of the passive radiator so that the passive radiator vibrates in a balanced
manner. The diaphragm main body portion includes a flat dome portion at the center portion and
an edge portion having a predetermined arc surface located at the edge portion. The bending
directions of the edge portions of the passive radiator 51 and the passive radiator 52 in the
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10
present embodiment are the same direction, and the consistency of the two passive radiators can
be guaranteed, but not limited to these configurations.
[0032]
As shown in FIG. 1, the rear acoustic cavity of the speaker module is mainly surrounded by the
intermediate housing 12 and the lower housing 13. The passive radiator 51 and the passive
radiator 52 are both coupled to the protrusion of the intermediate housing 12. As shown in FIGS.
1 and 3, the intermediate housing 12, the passive radiator 51 and the passive radiator 52 form
one independent internal cavity surrounded by only two sound conduits, and the internal cavity
is a sound emission hole of the passive sound source. Connect with the outside to realize
communication. Similarly, in order to fully utilize the space of the speaker module, the metal
plate 121 is installed by injection molding at a position facing the passive radiator 51 of the
intermediate housing 12 and at a position facing the passive radiator 52 of the lower housing 13.
The metal plate 131 is installed. Thus, the configuration in which the metal plate is installed by
injection molding at a position where the amplitude of the passive radiator 51 and the passive
radiator 52 is large, the height (space) of the position is increased, and a sufficient space for
vibration of the two passive radiators is provided. It can provide and thereby guarantee the
sound performance of the speaker module.
[0033]
4 and 5, FIG. 4 is a perspective view in which the upper housing 11 is removed from the speaker
module, and FIG. 5 is a perspective view in which the lower housing 13 is removed from the
module. A sound emission hole 20 for a passive sound source is formed between the housing 12
and the upper housing 11. As shown in FIG. 4, the upper case 11 is not shown in order to clearly
show the configuration and the position of the sound emission hole 20 of the passive sound
source. The sound emission holes 20 of the passive sound source are located on both sides of the
sound emission hole 10 of the drive sound source, and are independent from the sound emission
hole 10 of the drive sound source. The sound emission holes 20 of the two passive sound sources
are also independent of each other, and the sound waves generated by the passive radiator are
divided into two and emitted from the sound emission holes 20 of the two passive sound sources
to the outside.
[0034]
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11
Preferably, the sound emitting hole 10 of the driving sound source and the sound emitting hole
20 of the passive sound source are located on the same side of the protective frame to facilitate
assembly with the end product. Referring to FIG. 5, after the air flow between passive radiator 51
(not shown) and passive radiator 52 is discharged through opening 53, the sound formed by the
coupling of intermediate housing 12 and lower housing 13. Enter the conduit. The transmission
path is finally emitted from the sound emission hole 20 of the passive sound source to the
outside through the sound conduit, as the arrow in FIG. 5 shows. The intermediate housing 12 is
provided with a protruding coupling rib 123, and as shown in FIG. 5, the coupling rib 123 is
fixedly coupled to the lower housing 13 by ultrasonic welding, adhesion or the like, and a passive
radiator is provided. Form the sound conduit of the sound wave.
[0035]
Four openings 330 are provided at four corners of the frame 33 of the driving sound source, and
as shown in FIG. 5, after the sound wave on the rear side of the diaphragm 21 is transmitted to
the rear acoustic cavity through the openings 330, It can be transmitted to both sides. Referring
to FIG. 5, the sound wave transmitted from the opening 330 and the sound wave transmitted in
the opening 53 are separated by the coupling rib portion 123. That is, bifurcated sound waves
are separated by the intermediate housing 12 and the lower housing 13 and flow in different
transmission paths. In the outer wall of the sound conduit, a steel plate is installed by injection
molding at a position facing the driving sound source, and specifically, at a position facing the
driving sound source outside the side wall of the intermediate housing 12 as shown in FIG. The
steel plate 124 is installed by injection molding. By placing the steel plate 124 in that position,
the high strength features of the steel plate can be used to increase the inner diameter of the
sound conduit, thereby favoring the emission of passive sound waves and also improving the
acoustic performance.
[0036]
1 to 5, the speaker module of the present invention includes a drive sound source and a passive
sound source, and the sound generated from the diaphragm 21 of the drive sound source is
externally output through the sound emission hole 10 of the drive sound source. Released. The
sound waves in this part are mainly sound waves in the middle high frequency range, and the
passive sound source is provided with two passive radiators, a passive radiator 51 and a passive
radiator 52. Each of these passive radiators is energized with the sound wave on the rear side of
the diaphragm 21, and extrudes the air flow in the cavity between the two passive radiators and
16-04-2019
12
emits it to the outside to form a low frequency sound wave. Specifically, the sound wave located
on the rear acoustic cavity side of the diaphragm 21 of the driving sound source is output from
the opening 330 at the corner of the frame 33 to the portion where the passive radiator is
located. Transmitted to the upper and lower sides of the passive radiator. The air flow between
the two passive radiators is extruded and output from the opening 53 and enters the sound
conduit surrounded by the intermediate housing 12 and the lower housing 13. The sound wave
of the passive sound source can reach the outside through the sound emission hole 20 of the
passive sound source at the other end of the sound conduit, and a low frequency sound wave can
be emitted to the outside.
[0037]
As described above, the speaker module provided by the present invention places a passive
sound source in the rear acoustic cavity, and the passive sound source comprises two passive
radiators installed in parallel, and the cavity between the two passive radiators The extrusion of
the air flow generates low frequency sound waves. Even if the size of the speaker module is
small, such a configuration can fully utilize the space in the speaker module to enhance the bass
effect and improve the acoustic performance of the module.
[0038]
The speaker module of the present invention has been described above with reference to the
drawings through the embodiments. However, other improvements and modifications can be
made to the above-described speaker module of the present invention without departing from
the scope of the present invention, and all these improvements and modifications fall within the
protection scope of the present invention. It will be clear to the person skilled in the art. It is
obvious to those skilled in the art that the specific description above merely interprets the object
of the present invention, and the protection scope of the present invention is limited by the scope
of claims and equivalent constitution.
[0039]
DESCRIPTION OF SYMBOLS 10 sound emission hole 11 of driving sound source Upper housing
12 middle housing 13 lower housing 20 sound emission hole 21 of passive sound source 21
diaphragm 22 voice coil 31 spring washer 32 magnet 33 frame 51 passive radiator 52 passive
radiator 53 opening 110 metal Plate 120 Support column 121 Metal plate 123 Coupling rib 124
Steel plate 131 Metal plate 211 Edge 330 Frame opening 510 Diaphragm main body 511 Mass
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13
520 Diaphragm main body 521 Mass
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