KR20230166491A - Noise reduction type speaker - Google Patents

Abstract

The present invention relates to a noise reduction speaker, which includes a front case where the main speaker and a woofer are installed, a port portion located at the rear of the front case and forming a conduit through which air moves, and a shape that surrounds the rear of the woofer. It includes an inner enclosure, a first reinforcing part installed at a corner of the front case to reinforce the structural rigidity of the front case, a connection hole connected to the port part, and a rear case coupled to the rear of the front case.

Description

Noise reduction type speaker{NOISE REDUCTION TYPE SPEAKER}

The present invention relates to a noise reduction speaker that improves sound quality by reducing noise generated by vibration of an enclosure.

In general, a speaker is an audio device that radiates sound waves by converting electrical signals into vibrations of a diaphragm and generating small waves in the air. Speakers convert electrical pulses into sound waves.

The type in which the diaphragm is placed directly in the air is called a radiant speaker, and the type in which the diaphragm is placed in a horn is called a horn-type speaker. Most direct radiation types are cone speakers, which are commonly used in radios and stereo devices, and some use metal diaphragms.

Depending on the principle and method of converting electrical signals into sound waves, there are coin type, electromagnetic type, electrostatic type, dielectric type, and magnetic distortion type. Coin types with good performance are widely used for music playback or voice use. The coin type uses the principle that when a voice signal current flows through a coil within the magnetic field of a permanent magnet, mechanical force acts on the coil depending on the strength of the current to cause movement.

The electromagnetic type sends a negative current to a coil installed at the end of a permanent magnet, causing the iron piece between the coils to vibrate, and this vibration is transmitted to the diaphragm by a lever to radiate sound.

The electrostatic type is sometimes used for high-pitched sounds, and the dielectric type and magnetostrictive type are used in the ultrasonic range above 20 kHz, not the audible frequency. Among audible frequency speakers, those used especially for high frequency ranges (above 10 kHz) are called tweeters. There are horn-type and cone-type speakers, and the weight of the vibrator is small.

The enclosure that forms the case of the speaker refers to the barrel of the speaker. The enclosure is a very important part that changes the acoustic characteristics of the speaker. When the speaker's cone receives a + signal, it protrudes forward and momentarily compresses the air in front. Conversely, the back of the cone expands as the volume of air expands. Without an enclosure, the compression and expansion generated by the speaker meet, so the air pressure cancels out. When air pressure is canceled out, the sound almost disappears, so an enclosure is needed to prevent this.

The enclosure may experience a booming phenomenon where vibration occurs due to the vibration of the speaker. On the other hand, when the enclosure material is made of synthetic resin, the structural rigidity is lower compared to when wood, etc. is used, so there is a problem that the possibility of generating noise due to a booming phenomenon where the enclosure trembles increases. Therefore, there is a need to improve this.

The background technology of the present invention is published in Republic of Korea Patent Publication No. 10-1820896 (registered on January 16, 2018, title of the invention: Audio speaker with speaker unit mounted in an enclosure).

The purpose of the present invention is to provide a noise reduction speaker that can reduce vibration through the rigid design of the enclosure.

Another object of the present invention is to provide a noise reduction speaker that can reduce production costs by using an injection method using synthetic resin.

Another object of the present invention is to provide a noise reduction speaker that can improve sound quality by reducing reflected waves within the speaker.

The objects of the present invention are not limited to the objects mentioned above, and other objects and advantages of the present invention that are not mentioned can be understood by the following description and will be more clearly understood by the examples of the present invention. Additionally, it will be readily apparent that the objects and advantages of the present invention can be realized by the means and combinations thereof indicated in the patent claims.

The technical feature of the noise reduction speaker according to the present invention to solve the problems described above is that vibration of the speaker is reduced by installing a reinforcing structure between the front case and the rear case.

Specifically, since the first reinforcement parts in the shape of triangular pillars are installed at the four corners of the main speaker, vibration of the front case can be reduced. In addition, the second reinforcement, third reinforcement, and fifth reinforcement are installed around the inner enclosure surrounding the woofer to reduce vibration of the structure consisting of the front case and the rear case. In addition, the fourth reinforcement part is installed in the rear case to reinforce the structural rigidity of the rear case.

Additionally, its technical feature is that the front and rear cases are produced by injection molding of synthetic resin.

Specifically, the front and rear cases are molded using thermoplastic resin injection molding, which reduces product weight and production costs.

Additionally, its technical feature is to improve sound quality by reducing reflected waves within the speaker.

Specifically, the speed of the standing wave generated by the sound generated from the main speaker and woofer is reduced as it passes through the first connection hole provided in the second reinforcement section, the second connection hole, and the ventilation hole of the third reinforcement section, thereby improving sound quality. .

The noise reduction speaker according to the present invention includes a front case where the main speaker and woofer are installed, a port portion located at the rear of the front case and forming a conduit through which air moves, and an inner side installed in a shape that surrounds the rear of the woofer. It includes an enclosure, a first reinforcing part installed at a corner of the front case to reinforce the structural rigidity of the front case, a connection hole connected to the port part, and a rear case coupled to the rear of the front case.

In addition, the first reinforcement part is a pillar with a triangular cross-section and is mounted on each corner of the front case.

Additionally, at least one of the front case and the back case is molded from synthetic resin.

In addition, the present invention further includes a second reinforcement part that is installed in the shape of a plate with holes on the upper and lower sides of the inner enclosure, and restrains the vertical movement of the inner enclosure.

The second reinforcement unit includes a first frame and a second frame. The first frame is located on the upper side of the inner enclosure, is installed in contact with the front case and the rear case, respectively, and has a plate shape with a first connection hole through which air moves. The second frame is located on the lower side of the inner enclosure, is installed in contact with the front case and the rear case, respectively, and has a plate shape with a second connection hole for air movement.

The noise reduction speaker according to the present invention includes a front case where the main speaker and woofer are installed, a port portion located at the rear of the front case and forming a conduit through which air moves, and a port portion that is inserted inside the front case to form a front case. It has a connection hole connected to the inner case portion and the port portion that supports and is installed in a shape that surrounds the rear of the woofer, and includes a rear case that is coupled to the rear of the inner case.

In addition, the inner case part has a square inner frame part extending along the inner edge of the front case, a first inner reinforcement part installed at the corner of the inner frame part to reinforce the structural rigidity of the inner frame part, and a shape that surrounds the rear side of the woofer. It is installed in the shape of a plate with holes on the upper and lower sides of the inner enclosure and the inner enclosure, respectively, and includes a second inner reinforcement part connecting the inner frame part and the inner enclosure.

In addition, the port portion is installed on at least one of the upper and lower sides of the main speaker and extends in the width direction of the front case, and a first pipe portion extends from the end of the first pipe portion in the direction toward the rear case and communicates with the connection hole. Includes 2 pipe sections.

The noise reduction speaker according to the present invention reduces the vibration of the front and rear cases injection-molded from synthetic resin and the resulting noise, thereby reducing the booming phenomenon and improving output sound quality.

In addition, since the present invention is manufactured using parts made by injection molding of synthetic resin, production costs can be reduced, and the weight of the product can be reduced, thereby reducing logistics costs.

In addition, in the present invention, a plurality of reinforcing parts having holes are installed on the inside to reduce the speed of standing waves and reflected waves, so that sound sources can be reproduced with minimized noise.

In addition to the above-described effects, specific effects of the present invention are described below while explaining specific details for carrying out the invention.

Figure 1 is a perspective view showing a noise reduction speaker according to an embodiment of the present invention.
Figure 2 is an exploded perspective view of a noise reduction speaker according to an embodiment of the present invention.
Figure 3 is a perspective view showing the internal configuration of a noise reduction speaker according to an embodiment of the present invention.
Figure 4 is a front view showing the internal configuration of a noise reduction speaker according to an embodiment of the present invention.
Figure 5 is a perspective view showing the inner enclosure and each reinforcement portion according to an embodiment of the present invention.
Figure 6 is an exploded perspective view of the inner enclosure and each reinforcement portion according to an embodiment of the present invention.
Figure 7 is a perspective view showing a noise reduction speaker according to another embodiment of the present invention.
Figure 8 is a perspective view showing the inner case portion according to another embodiment of the present invention.
Figure 9 is a front view of the inner case portion and the front case according to another embodiment of the present invention.
Figure 10 is a front view of a port portion installed inside the inner case portion according to another embodiment of the present invention.
Figure 11 is a front view showing a state in which side ribs and lower ribs are reinforced in the inner case portion according to another embodiment of the present invention.

The above-mentioned objects, features, and advantages will be described in detail later with reference to the attached drawings, so that those skilled in the art will be able to easily implement the technical idea of the present invention. In describing the present invention, if it is determined that a detailed description of known technologies related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings. In the drawings, identical reference numerals are used to indicate identical or similar components.

Figure 1 is a perspective view showing a noise reduction type speaker 1 according to an embodiment of the present invention, and Figure 2 is an exploded perspective view of a noise reduction type speaker 1 according to an embodiment of the present invention.

As shown in Figures 1 and 2, the noise reduction speaker 1 according to an embodiment of the present invention has a main speaker 20 and a side speaker 30 installed in the front case 10 to produce sound. Play. The front case 10 and the rear case 70, which correspond to the outer case, form an enclosure.

The enclosure has a box shape consisting of a front case (10) and a rear case (70), and changes the characteristics of the sound generated from the main speaker (20) and side speakers (30). The sound characteristics change depending on the material of the front case 10 and the rear case 70 that form the enclosure and the degree of vibration.

The larger the size of the front case (10) and the rear case (70) that form the enclosure, the more the resonance inside the box increases, so the bass sound can be reinforced and the characteristics of the sound can be changed.

Since the enclosure formed by the front case 10 and the rear case 70 is made of synthetic resin, vibration may occur more easily, and the first reinforcement portion 80 and the second reinforcement portion are provided between the front case 10 and the rear case 70. At least one of the second reinforcement unit 100, the third reinforcement unit 130, the fourth reinforcement unit 140, and the fifth reinforcement unit 150 is installed.

The first reinforcement portion 80 is installed at the four corners of the front case 10 to reduce vibration of the front case 10.

The second reinforcing part 100 is installed in a standing shape on the upper and lower sides of the inner enclosure 60, which is installed in a shape surrounding the side speaker 30, and reinforces the structural rigidity of the front case 10. In addition, since a hole through which air moves is provided inside the second reinforcing part 100, the inner space of the front case 10 is prevented from being separated by the second reinforcing part 100.

The third reinforcement portion 130 is installed between the inner enclosure 60 and the rear case 70 to reinforce the structural rigidity of the inner enclosure 60 and the rear case 70. In addition, since a hole through which air moves is provided inside the third reinforcement part 130, the inner space of the front case 10 is prevented from being separated by the third reinforcement part 130.

The fourth reinforcement portion 140 is fixed to the inside of the rear case 70 to reduce the vibration of the plate-shaped rear case 70.

The fifth reinforcing part 150 is installed between the inner enclosure 60 and the central hole 12 formed in the center of the front case 10 to reinforce the structural rigidity of the inner enclosure 60 and the front case 10.

By installing the first reinforcement unit 80, the second reinforcement unit 100, the third reinforcement unit 130, the fourth reinforcement unit 140, and the fifth reinforcement unit 150, the noise reduction speaker (1) The structural rigidity is reinforced to reduce reflected waves and standing waves generated inside the noise reduction speaker (1).

The sound coming from the back of the main speaker (20) and the side speaker (30) continues to be reflected in the box consisting of the front case (10) and the rear case (70) and may hit the back of the main speaker (20) and the side speaker (30). And, standing waves may occur, which may deteriorate sound quality.

Standing waves are a phenomenon in which the sound coming from the back of the main speaker (20) and the side speaker (30) meets the reflected sound that bounces off the inner wall of the noise reduction speaker (1) and overlaps or disappears.

Not all frequencies of sound generated from the noise reduction speaker 1 become standing waves, and the specific frequency that causes standing waves is determined depending on the size of the hexahedral space formed by the front case 10 and the rear case 70.

A standing wave is a phenomenon in which direct sound from a speaker meets the reflected sound that bounces off the inner wall of the noise reduction speaker (1), generating an overlapping peak or a dip that disappears. If we look at standing waves from the perspective of speed and pressure, the higher the speed and pressure, the stronger the peaks and dips and the more they distort the sound.

Speed is the distance traveled divided by the reference time, that is, the change in amplitude divided by the reference time. When the amplitude is largest, the speed is high. The sound pressure becomes maximum at the point where the change in amplitude is 0, which is the point where the wave oscillates up and down and passes through 0. In other words, the speed and pressure associated with standing waves are inversely proportional.

Therefore, in order to reduce the standing wave, a structure that reduces the speed of the standing wave is required, and the first reinforcement unit 80, the second reinforcement unit 100, the third reinforcement unit 130, and the fifth reinforcement unit 150 are used to reduce the standing wave speed. decreases the speed of

Additionally, sound-absorbing material may be additionally installed in the space formed inside the front case 10 and the rear case 70. It reduces the speed of standing waves and absorbs the energy of standing waves, allowing for clearer output sound.

The noise reduction speaker (1) according to an embodiment of the present invention includes a front case (10), a main speaker (20), a side speaker (30), a port portion (50), an inner enclosure (60), and a rear case ( 70) and a first reinforcement portion 80. In addition, the noise reduction speaker 1 may include at least one of the second reinforcement unit 100, the third reinforcement unit 130, the fourth reinforcement unit 140, and the fifth reinforcement unit 150. .

The front case 10 is equipped with a main speaker 20 and a side speaker 30, and forms the front of the noise reduction speaker 1. The front case 10 according to an embodiment of the present invention is shaped like a rectangular box with an open rear end. However, depending on the overall shape of the noise reduction speaker 1, the front case 10 can be transformed into various shapes, such as a sphere or cylindrical case.

The front case 10 according to an embodiment of the present invention includes a front panel 11 and a side panel 17. The front panel 11 has holes for installing the main speaker 20 and the side speakers 30, and has a plate shape.

The front panel 11 according to an embodiment of the present invention is a rectangular plate, and a central hole 12 for mounting the main speaker 20 is provided at the center in the width direction (W). Side hole parts 13, which are holes for installing side speakers 30, are installed on both sides of the central hole part 12.

The side panel 17 extends rearward from the edge of the front panel 11 toward the rear case 70. The side panel 17 has a square frame shape, and the side panel 17 and the front panel 11 are manufactured as one piece.

The front case 10 may be injection molded from synthetic resin. The front case 10 according to an embodiment of the present invention is injection molded with thermoplastic resin, so production costs can be reduced compared to existing speaker cases made of wood, etc. The front case 10 and the rear case 70 coupled to the rear of the front case 10 are injection molded with thermoplastic resin, so mass production is possible and production costs can be reduced.

The main speaker 20, which has a larger diameter than the side speakers 30, is installed in the central hole 12 forming a hole in the center of the front panel 11. The side speakers 30 are installed on both sides of the main speaker 20 in the width direction (W). Two side speakers 30 according to an embodiment of the present invention are installed on both sides of the main speaker 20 in the width direction (W).

Among the side speakers 30, the side speaker 30 installed above is the first speaker 32, and the second speaker 34 is installed below the first speaker 32. The installation number and installation location of the main speaker 20 and side speakers 30 are not fixed, and can of course be changed depending on the usage environment or customer needs.

The main speaker (20) and side speaker (30) can be directly fixed to the front case (10), and a poron is attached to the area where the main speaker (20) and side speaker (30) are joined to the front case (10). By attaching a sponge, the main speaker 20 and the side speakers 30 can be stably fixed to the front case 10. A poron is installed at the area where the main speaker 20 and the side speaker 30 are connected to the front case 10 to block the gap through which air passes, thereby providing improved sound quality.

In addition, by installing a plurality of fastening structures to secure the front case 10 and the rear case 70, a gap between the front case 10 and the rear case 70 is prevented, thereby providing improved sound quality.

Figure 3 is a perspective view showing the internal configuration of the noise reduction type speaker 1 according to an embodiment of the present invention, and Figure 4 shows the internal structure of the noise reduction type speaker 1 according to an embodiment of the present invention. This is a front view.

As shown in FIGS. 2 to 4, the port portion 50 is located at the rear of the front case 10, and various modifications are possible within the technical idea of forming a conduit through which air moves. It is a passage through which air in the inner space formed between the front case 10 and the rear case 70 moves to the outside of the noise reduction speaker 1 through the port portion 50. Air outside the noise reduction speaker 1 may move to the inside of the noise reduction speaker 1 through the port portion 50.

The waves coming out of the noise reduction speaker 1 through the port portion 50 reinforce the waves output to the front of the noise reduction speaker 1. The port portion 50 sets the inherent resonance frequency of the noise reduction speaker 1 lower, thereby reinforcing the low sound characteristics.

The port portion 50 is located on the upper side of the main speaker 20 and is made of a pipe shape bent in an “L” shape, so that the function of reinforcing low sounds can be improved while minimizing interference with other parts. One end of the port portion 50 communicates with the connection hole 72 provided in the rear case 70, and the other end of the port portion 50 communicates with the inside of the noise reduction speaker 1. The port portion 50 according to an embodiment of the present invention includes a first conduit portion 52 and a second conduit portion 54.

The first conduit portion 52 is installed on at least one of the upper and lower sides of the main speaker 20 and extends in the width direction (W) of the front case 10. The first pipe portion 52 has a circular pipe shape and extends in the width direction (W) of the front case 10.

The second pipe portion 54 extends from the end of the first pipe portion 52 toward the rear case 70 and communicates with the connection hole 72. The second pipe portion 54 is a pipe curved in an “L” shape and discharges sound to the rear of the noise reduction speaker (1) through the connection hole (72) provided in the rear case (70).

Since the first pipe portion 52 and the second pipe portion 54 are connected and the overall length of the port portion 50 increases compared to the pipe extending in a straight direction, the bass sound can be further reinforced.

Figure 5 is a perspective view showing the inner enclosure 60 and each reinforcement part according to an embodiment of the present invention, and Figure 6 is an exploded perspective view showing the inner enclosure 60 and each reinforcement part according to an embodiment of the present invention. .

As shown in FIGS. 2, 5, and 6, the inner enclosure 60 is installed in a shape that surrounds the rear of the side speaker 30, and various modifications are possible within the technical idea. The inner enclosure 60 according to an embodiment of the present invention has a hexahedral shape with the front opening facing the front case 10, and is shaped to surround the rear of the side speaker 30 and contact the rear of the front case 10. It is fixed.

The inner enclosure 60 functions to prevent the front and back spaces of the side speaker 30 from communicating with each other. Since the energy in front and behind the side speaker 30 does not meet each other, the sound of the side speaker 30 can be reproduced smoothly. In addition, installing the inner enclosure (60) increases the resonance inside the barrel, thereby reinforcing low sounds and changing the characteristics of the sound.

The inner enclosure 60 can be transformed into various shapes, including a hexahedral cylinder shape and a circular cylinder shape. The inner enclosure 60 according to an embodiment of the present invention is installed in a shape that surrounds the rear of the second speaker 34, and is fixed in contact with the rear surface of the front case 10.

The rear case 70 has a connection hole 72 connected to the port portion 50, and various modifications are possible within the technical idea of being coupled to the rear of the front case 10. The rear case 70 according to an embodiment of the present invention has a square plate shape and has a connection hole 72 that communicates with the second conduit portion 54.

At least one of the front case 10 and the rear case 70 may be molded from synthetic resin. The front case 10 and the rear case 70 according to an embodiment of the present invention are injection molded with thermoplastic resin among synthetic resins.

A cushioning material and a rib reinforcement structure to absorb sound vibration are additionally installed on the inside of the rear case (70) facing the front case (10), thereby reducing the vibration generated by the operation of the main speaker (20) and the side speaker (30). It can be absorbed or attenuated.

The first reinforcement portion 80 is installed at each corner provided on the inside of the front case 10. Since the first reinforcement portion 80 functions as a diffuse reflection structure, reflected waves can be reduced. Various modifications are possible, such as applying a diffused reflection coating to the surface of the first reinforcement portion 80 or forming a plurality of protrusions or grooves.

The first reinforcement portion 80 according to an embodiment of the present invention has a triangular pillar shape and can be fixed to each corner of the front case 10 to reinforce the structure of the front case 10. A first reinforcement unit 80 is installed to reduce disturbance and distortion of direct sound and the pressure of standing waves caused by reflected waves generated inside the noise reduction speaker 1. The first reinforcement unit 80 is a triangular pillar-shaped diffuse reflection structure installed at the corner of the front case 10 where the sound pressure is highest.

Meanwhile, reflected waves can also be reduced by attaching a sound-absorbing material to the inside of the noise reduction speaker 1. The first reinforcement portion 80 is a pillar with a triangular cross-section and is mounted on each corner of the front case 10 to reinforce the structural rigidity of the front case 10.

The first reinforcement portion 80 is inserted into the corner of the side panel 17 forming a square frame, makes surface contact with the side panel 17 and the front panel 11, and reinforces the structural rigidity of the front case 10. Therefore, the phenomenon of the front case 10 shaking due to the sound energy gathered at the corners of the front case 10 is reduced.

The second reinforcement portion 100 is installed in the shape of a plate with holes on the upper and lower sides of the inner enclosure 60, and various modifications are possible within the technical idea of restricting the vertical movement of the inner enclosure 60.

The front case 10 and the rear case 70 are molded from synthetic resin, and if necessary, are injection molded using thermoplastic resin among synthetic resins. Since the front case (10) and rear case (70) that form the enclosure are injection molded with thermoplastic resin, a reinforcing part of the partition wall structure with holes is installed to reinforce the rigidity of the front case (10) and rear case (70). do.

Since the reinforcing part including the second reinforcing part 100 is installed between the front case 10 and the rear case 70, reflected waves inside the noise reduction speaker 1 are reduced, and vibration and resonance are reduced.

The second reinforcement unit 100 according to an embodiment of the present invention includes a first frame 110 and a second frame 120.

The first frame 110 is located on the upper side of the inner enclosure 60 and is installed in contact with the front case 10 and the rear case 70, respectively. The first frame 110 has a square plate shape and is installed in an upright position on the upper side of the inner enclosure 60. The first frame 110 is installed perpendicular to the front panel 11. The upper side of the first frame 110 is in contact with the side panel 17, the front side of the first frame 110 is in contact with the front panel 11, and the lower side of the first frame 110 is in contact with the upper side of the inner enclosure 60. , and the rear of the first frame 110 is in contact with the rear case 70. Therefore, by installing the first frame 110, the structural rigidity of the front panel 11, side panel 17, inner enclosure 60, and rear case 70 is reinforced, and stress is more easily distributed, thereby reducing vibration and The durability of parts can be improved.

The plate-shaped first frame 110 is provided with a first connection hole 112 through which air moves. Therefore, the spaces on both sides of the width direction (W) of the first frame 110 are connected through the first connection hole 112 to allow movement of air or sound.

The reflected wave or standing wave generated inside the noise reduction speaker 1 passes through the first connection hole 112 and its speed is reduced. The reflected wave and the standing wave enter the first connection hole 112 and then exit the first connection hole 112 again, generating a vortex. These vortices act as aerodynamic drag and slow down the standing wave. The hole of the first connection hole 112 also functions as an expanded resonance space.

The first frame 110 is provided with a first locking protrusion 114 in the shape of a protrusion. The first locking protrusion 114 protrudes downward from the first frame 110 and contacts the outside of the inner enclosure 60. Therefore, the contact area between the inner enclosure 60 and the first frame 110 increases to reduce the vibration of the inner enclosure 60, thereby improving the sound quality of the second speaker 34 inside the inner enclosure 60. You can.

The second frame 120 is located on the lower side of the inner enclosure 60 and is installed in contact with the front case 10 and the rear case 70, respectively. The second frame 120 has a square plate shape like the first frame 110 and is installed in an upright position on the lower side of the inner enclosure 60. The second frame 120 is installed in succession at a position facing the first frame 110 with the inner enclosure 60 in between, and is installed perpendicular to the front panel 11. The lower side of the second frame 120 is in contact with the side panel 17, the front side of the second frame 120 is in contact with the front panel 11, and the upper side of the second frame 120 is in contact with the lower side of the inner enclosure 60. , and the rear of the second frame 120 is in contact with the rear case 70. Therefore, by installing the second frame 120, the structural rigidity of the front panel 11, side panel 17, inner enclosure 60, and rear case 70 is strengthened, and stress is more easily distributed, thereby reducing vibration and The durability of parts can be improved.

The plate-shaped second frame 120 is provided with a second connection hole 122 through which air moves. Therefore, the spaces on both sides of the second frame 120 in the width direction (W) are connected through the second connection hole 122 to allow movement of air or sound.

The reflected wave or standing wave generated inside the noise reduction speaker 1 passes through the first connection hole 112 and the second connection hole 122, and the speed is reduced. Since the function of the second connection hole 122 is the same as that of the first connection hole 112, detailed description thereof will be omitted.

The second frame 120 is provided with a second locking protrusion 124 in the shape of a protrusion. The second locking protrusion 124 protrudes upward from the second frame 120 and contacts the outside of the inner enclosure 60. Therefore, the contact area between the inner enclosure 60 and the second frame 120 increases to reduce the vibration of the inner enclosure 60, thereby improving the sound quality of the second speaker 34 inside the inner enclosure 60. You can.

The third reinforcement portion 130 is located between the inner enclosure 60 and the rear case 70, and is installed in contact with the inner enclosure 60 and the rear case 70, respectively. The third reinforcing part 130 can be modified in various ways within the technical concept of having a plate shape with ventilation holes 134 for moving air. The third reinforcement part 130 according to an embodiment of the present invention includes a third reinforcement body 132 and a fixing protrusion 136.

The third reinforcement body 132 is installed in contact with the inner enclosure 60 and the rear case 70, respectively, and has a plate shape with a ventilation hole 134 through which air moves. The third reinforcement body 132 has a square plate shape and is installed in an upright position at the rear of the inner enclosure 60. The third reinforcement body 132 is installed perpendicular to the rear of the inner enclosure 60 and the rear case 70. The front of the third reinforcement body 132 is in contact with the rear of the inner enclosure 60, and the rear of the third reinforcement body 132 is in contact with the inner surface of the rear case 70. Therefore, by installing the third reinforcement body 132, the structural rigidity of the inner enclosure 60 and the rear case 70 is reinforced, the vibration of the inner enclosure 60 and the rear case 70 is reduced, and the durability of the parts is improved. You can.

The plate-shaped third reinforcing body 132 is provided with a ventilation hole 134 through which air moves. Accordingly, the spaces on both sides of the third reinforcement body 132 in the width direction (W) are connected through the ventilation holes 134 to allow movement of air or sound.

The reflected wave or standing wave generated inside the noise reduction speaker 1 passes through the ventilation hole 134 and its speed is reduced. The reflected wave and the standing wave enter the ventilation hole 134 and then come out of the ventilation hole 134 again, generating a vortex. These vortices act as aerodynamic drag and slow down the standing wave.

The third reinforcement body 132 is installed in the vertical direction, and the fixing protrusions 136 protrude from the top and bottom of the third reinforcement body 132 and contact the upper and lower sides of the inner enclosure 60.

The fixing protrusion 136 located on the upper side of the third reinforcing body 132 protrudes forward and contacts the upper side of the inner enclosure 60, and the fixing protrusion 136 located on the lower side of the third reinforcing body 132 protrudes forward. It protrudes into contact with the lower side of the inner enclosure 60. The third reinforcement portion 130 is formed in a “L” shape and is installed to surround the rear surface of the inner enclosure 60. In addition, the third reinforcement body 132 is fixed to the rear case 70 by a method such as bolting, so that the inner enclosure 60 located in front of the rear case 70 can be stably fixed.

The fourth reinforcement portion 140 is fixed to the rear case 70 located behind the main speaker 20, and various modifications are possible within the technical idea of reducing vibration of the rear case 70. Since the output of the main speaker 20 is greater than that of other speakers, the fourth reinforcement part 140 is installed on the inner surface of the rear case 70 located behind the main speaker 20. The fourth reinforcing part 140 according to an embodiment of the present invention includes a first reinforcing member 142 and a second reinforcing member 144.

The first reinforcing member 142 has a band shape extending in a ring shape. The first reinforcing member 142 is a reinforcing frame extending in a ring shape, and is fixed to or integrally formed on the inner surface of the rear case 70.

The second reinforcing member 144 extends radially from the center of the first reinforcing member 142, which has a circular band shape. The first reinforcing member 142 and the second reinforcing member 144 are installed at the same time to reinforce the structural rigidity of the rear case 70, and either the first reinforcing member 142 or the second reinforcing member 144 is used. Even if only one is installed, the structural rigidity of the rear case 70 can be strengthened.

The fifth reinforcement part 150 is installed between the inner enclosure 60 and the central hole part 12 for mounting the main speaker 20, and various modifications are made within the technical idea of reinforcing the side of the inner enclosure 60. possible. The fifth reinforcement portion 150 is installed in contact with the front panel 11 and the side of the inner enclosure 60 at the same time. In addition, the front of the fifth reinforcement part 150 is in contact with the front panel 11, and the rear of the fifth reinforcement part 150 is in contact with the rear case 70, so the structural rigidity of the noise reduction speaker 1 can be reinforced. there is.

The fifth reinforcement unit 150 according to an embodiment of the present invention includes a first support member 152, a second support member 154, and a third support member 156.

The first support member 152 is installed in a direction crossing the second reinforcement portion 100 and has a plate shape. The first support member 152, which has a plate shape perpendicular to the front panel 11, is installed perpendicular to the second reinforcement portion 100. A plurality of first support members 152 are provided and installed parallel to each other. The first support member 152 is located on the side of the inner enclosure 60 and extends in the width direction (W) of the inner enclosure 60.

The second support member 154 is installed in a direction crossing the first support member 152 and connects the plurality of first support members 152. The second support member 154 intersects the first support member 152 perpendicularly and extends in the vertical direction.

The third support member 156 is connected to at least one of the first support member 152 and the second support member 154, and has a rod shape extending in the longitudinal direction (D) of the front case 10. One side of the third support member 156 is in contact with the front panel 11, and the other side of the third support member 156 is in contact with the rear case 70.

Hereinafter, the operating state of the noise reduction speaker 1 according to an embodiment of the present invention will be described in detail with reference to the attached drawings.

Sound generated from the main speaker 20 and the side speakers 30 is output toward the front of the front case 10. The sound output to the rear of the main speaker 20 and the sound output to the rear of the first speaker 32 are discharged to the outside of the noise reduction speaker 1 through the port portion 50, thereby reinforcing low sound.

The length of the port portion 50 is increased by using a curved pipe rather than a straight pipe, so the bass reinforcement effect by the port portion 50 is improved.

In addition, the sound output to the rear of the second speaker 34 stays inside the sealed inner enclosure 60, thereby improving the sound quality of the second speaker 34.

In addition, the structural rigidity of each corner provided in the front case 10 is reinforced by the first reinforcing part 80 to reduce vibration, thereby preventing deterioration of sound quality due to booming. Each corner provided in the front case 10 is the point where the standing wave pressure is maximum and the sound pressure is the highest, so the first reinforcement portion 80 is installed.

Then, a sound-absorbing material is attached to the inside of the noise reduction speaker (1) to reduce reflected waves.

The structural rigidity of the noise reduction speaker (1) is reinforced by the second reinforcing part 100, the third reinforcing part 130, the fourth reinforcing part 140, and the fifth reinforcing part 150, and it is made of plastic. Prevents or reduces vibration of the front case 10 and rear case 70.

In addition, the speed of reflected waves and standing waves passing through the holes provided in the second reinforcing part 100 and the third reinforcing part 130 is lowered, so the output sound quality can be improved.

Hereinafter, a noise reduction speaker 300 according to another embodiment of the present invention will be described with reference to the drawings.

For convenience of explanation, components that have the same structure and function as those of an embodiment of the present invention are cited with the same reference numerals and detailed descriptions thereof are omitted.

Figure 7 is a perspective view showing a noise reduction speaker 300 according to another embodiment of the present invention, and Figure 8 is a perspective view showing the inner case portion 200 according to another embodiment of the present invention.

As shown in Figures 7 and 8, the noise reduction speaker 300 according to another embodiment of the present invention integrates the structure for preventing diffuse reflection and the structure for reinforcing structural rigidity, and then is installed in the front case (10). ) is a structure that binds to.

The inner enclosure 230, the first reinforcing part 80, the second reinforcing part 100, the third reinforcing part 130, the fourth reinforcing part 140, and the first reinforcing part 80, which were previously produced and assembled as separate parts, 5 The parts corresponding to the reinforcement part 150 are injection molded into one part and produced as a single part.

Since multiple existing parts are produced as a single part, material and investment costs are lowered, and productivity and product strength are increased. Since the inner case portion 200 is made of an integrated structure, production costs can be reduced by producing the product through one-time molding without secondary processing such as component fusion.

The noise reduction speaker 300 according to another embodiment of the present invention includes a front case 10, a main speaker 20, a side speaker 30, a port portion 50, an inner case portion 200, and a rear case. Includes (70). Since the front case 10, main speaker 20, side speaker 30, port portion 50, and rear case 70 are the same as in one embodiment of the present invention, their description is omitted.

The inner case portion 200 is structured with matrix-shaped ribs and inner holes applied to the ribs to reduce reflected waves and standing waves. By additionally combining the inner case part 200, which corresponds to the framework, to the front case 10, which forms the outer shell, a semi-monocoque structure is implemented that evenly distributes the load. Semi-monocoque structures are also used in aircraft airframes to avoid stress.

Since the inner case part 200 is installed between the front case 10 and the rear case 70, the vibration of the front case 10 and the rear case 70 and the resulting noise are reduced to reduce the booming phenomenon, thereby improving the output sound quality. can be improved.

Meanwhile, a display unit 400 is installed on the front of the front case 10 to check the operating status of the device. The display unit 400 uses a liquid crystal panel and outputs the operating status of the noise reduction speaker 300 through the screen.

Figure 9 is a front view of the inner case portion 200 and the front case 10 according to another embodiment of the present invention, and Figure 10 is a port portion ( This is the front view with 50) installed.

As shown in Figures 8 to 10, the inner case portion 200 is inserted into the inside of the front case 10, supports the front case 10, and is installed in a shape that surrounds the rear side of the side speaker 30. Various transformations are possible within technological thought.

The inner case portion 200 according to another embodiment of the present invention includes an inner frame portion 210, a first inner reinforcing portion 220, an inner enclosure 230, a second inner reinforcing portion 240, and a third inner reinforcing portion. It includes a reinforcement portion 250 and a fifth inner reinforcement portion 300. Additionally, the inner case portion 200 may further include a side rib 260 and a lower rib 270.

The inner frame portion 210 is a square frame extending along the inner edge of the front case 10. The inner frame portion 210 is inserted into the front case 10, makes surface contact, and is fixed.

The first inner reinforcement part 220 is installed at the corner of the inner frame part 210 to reinforce the structural rigidity of the inner frame part 210. The first inner reinforcement part 220 has the same shape and function as the first reinforcement part 80, and if necessary, an empty space can be formed inside the first inner reinforcement part 220.

The first inner reinforcement part 220 according to another embodiment of the present invention is installed in the shape of a partition at the four corners of the inner frame part 210, and has a triangular cross-section along with the inner frame part 210, thereby reducing material costs. This can be done, and the weight of the inner case portion 200 can be reduced.

Each part constituting the inner case portion 200 may be integrally injection molded. The inner frame portion 210, the first inner reinforcing portion 220, the inner enclosure 230, and the second inner reinforcing portion 240 may be injection molded integrally. In addition, the third inner reinforcing part 250, the side rib 260, the lower rib 270, and the fifth inner reinforcing part 300 can be added to the inner case part 200 having the above configuration and injection molded as one piece. there is.

The second inner reinforcement portion 240 is installed in the shape of a plate with holes on the upper and lower sides of the inner enclosure 230, respectively. In addition, the second inner reinforcement part 240 connects the inner frame part 210 and the inner enclosure 230 and also functions to fix the inner enclosure 230 to the inside of the inner frame part 210. The second inner reinforcement portion 240 includes a first inner frame 242 and a second inner frame 246.

The first inner frame 242 is located on the upper side of the inner enclosure 230 and has a plate shape connecting the inner frame portion 210 and the inner enclosure 230. Since the first inner frame 242 is provided with a first inner connection hole 244 through which air moves, the speed of reflected waves and standing waves can be reduced.

The second inner frame 246 is located on the lower side of the inner enclosure 230 and has a plate shape connecting the inner frame portion 210 and the inner enclosure 230. Since the second inner frame 246 is provided with a second inner connection hole 248 through which air moves, the speed of reflected waves and standing waves can be reduced.

The first inner frame 242 has a similar or identical shape and function to the first frame 110, and the second inner frame 246 has a similar or identical shape and function to the second frame 120, so detailed information accordingly. The explanation is omitted.

The third inner reinforcement portion 250 is located between the inner enclosure 230 and the rear case 70, and is formed integrally with the inner enclosure 230. In addition, the third inner reinforcement portion 250 is fixed to the rear case 70 in a plate shape having an inner ventilation hole 134 through which air moves. Since the third inner reinforcement part 250 is similar to or has the same shape and function as the third reinforcement part 130, detailed description thereof will be omitted.

The fifth inner reinforcement part 300 is installed between the inner enclosure 230 and the central hole part 12 for mounting the main speaker 20, and reinforces the side of the inner enclosure 230. The fifth inner reinforcement portion 300 is installed in contact with the front panel 11 and the side of the inner enclosure 230 at the same time. The fifth inner reinforcement part 300 according to another embodiment of the present invention includes a first inner support member 302, a second inner support member 304, and a third inner support member 306.

The first inner support member 302 is installed in a direction crossing the second inner reinforcement portion 240 and has a plate shape. Since the first inner support member 302 corresponds to the first support member 152, detailed description thereof will be omitted.

The second inner support member 304 is installed in a direction crossing the first inner support member 302 and connects the plurality of first inner support members 302. Since the second inner support member 304 corresponds to the second support member 154, detailed description thereof will be omitted.

The third inner support member 306 is connected to at least one of the first inner support member 302 and the second inner support member 304, and has a rod shape extending in the longitudinal direction (D) of the front case 10. am. One side of the third inner support member 306 is in contact with the front panel 11, and the other side of the third inner support member 306 is in contact with the rear case 70.

Figure 11 is a front view showing a state in which the side ribs 260 and the lower ribs 270 are reinforced in the inner case portion 200 according to another embodiment of the present invention.

As shown in FIG. 11, the side rib 260 connecting the side of the inner enclosure 230 and the inner frame portion 210 is installed in the width direction (W) of the inner case portion 200, and is located in the vertical direction ( It is installed sequentially along H). Installation of the side ribs 260 reduces vibration and vibration of the inner enclosure 230.

The lower rib 270 extending downward of the fifth inner reinforcement part 300 connects the fifth inner reinforcement part 300 and the inner frame part 210, thereby restraining the shaking of the fifth inner reinforcement part 300. The movement of the fifth inner reinforcement part 300 and the inner enclosure 230 can be restricted.

When the inner case portion 200 having the above configuration is fixed to the inside of the front case 10, a method of press-fitting and fixing the inner case portion 200 to the inside of the front case 10 may be used, or a screw assembly, Methods such as double-sided adhesive assembly and heat fusion can be used.

As described above, the present invention has been described with reference to the illustrative drawings, but the present invention is not limited to the embodiments and drawings disclosed herein, and various modifications may be made by those skilled in the art within the scope of the technical idea of the present invention. It is obvious that transformation can occur. In addition, although the operational effects according to the configuration of the present invention were not explicitly described and explained while explaining the embodiments of the present invention above, it is natural that the predictable effects due to the configuration should also be recognized.

1,300: Noise reduction speaker
10: Front case
11: Front panel 12: Center hole part 13: Side hole part
17: Side panel
20: Main speaker
30: Side speaker 32: First speaker 34: Second speaker
50: Port section 52: First pipe section 54: Second pipe section
60: Inner enclosure
70: Rear case 72: Connection hole
80: first reinforcement part
100: Second reinforcement part
110: first frame 112: first connection hole 114: first locking jaw
120: 2nd frame 122: 2nd connection hole 124: 2nd locking jaw
130: Third reinforcement part 132: Third reinforcement body 134: Ventilation hole 136: Fixing protrusion
140: Fourth reinforcing part 142: First reinforcing member 144: Second reinforcing member
150: Fifth reinforcement 152: First support member 154: Second support member 156: Third support member
200: Inner case part 210: Inner frame part 220: First inner reinforcement part 230: Inner enclosure
240: Second inner reinforcement 242: First inner frame 244: First inner connection hole 246: Second inner frame 248: Second inner connection hole
250: Third inner reinforcement part
260: side ribs
270: lower rib
300: 5th inner reinforcement 302: 1st inner support member 304: 2nd inner support member 306: 3rd inner support member
400: display
W: Width direction D: Length direction H: Up and down direction

Claims (20)

Front case where main speaker and woofer are installed;
A port portion located at the rear of the front case and forming a conduit through which air moves;
an inner enclosure installed to surround the rear of the woofer;
A first reinforcement part installed at a corner of the front case to reinforce structural rigidity of the front case; and
A noise reduction speaker comprising: a rear case having a connection hole connected to the port portion and coupled to the rear of the front case.
According to paragraph 1,
The port portion includes a first conduit portion installed on at least one of the upper and lower sides of the main speaker and extending in the width direction of the front case; and
A noise reduction type speaker including; a second pipe portion extending from an end of the first pipe portion in a direction toward the rear case and communicating with the connection hole.
According to paragraph 1,
The port portion is located above the main speaker, has a pipe shape bent into an “L” shape, and one end of the port portion communicates with the connection hole.
According to paragraph 1,
The inner enclosure has a hexahedral shape with an open front, surrounds the rear of the woofer, and is in contact with the rear of the front case.
According to paragraph 1,
The first reinforcement part is a pillar with a triangular cross-section, and is mounted on each corner of the front case.
According to paragraph 1,
A noise reduction speaker in which at least one of the front case and the rear case is molded from synthetic resin.
According to paragraph 1,
A noise reduction speaker further comprising a second reinforcing part, which is installed in the shape of a plate with holes on the upper and lower sides of the inner enclosure, and restrains the vertical movement of the inner enclosure.
In clause 7,
The second reinforcement unit includes: a plate-shaped first frame located on the upper side of the inner enclosure, installed in contact with the front case and the rear case, respectively, and having a first connection hole through which air moves; and
A second plate-shaped frame located below the inner enclosure, installed in contact with the front case and the rear case, respectively, and having a second connection hole for air movement. A noise reduction speaker comprising a. .
According to paragraph 1,
A third reinforcing part in the shape of a plate located between the inner enclosure and the rear case, installed in contact with the inner enclosure and the rear case, respectively, and having a ventilation hole for air movement, further comprising a. Noise reduction speaker.
According to clause 9,
The third reinforcing part includes a plate-shaped third reinforcing body installed in contact with the inner enclosure and the rear case, respectively, and having a ventilation hole for moving air; and
A noise reduction speaker comprising: fixing protrusions that protrude from the top and bottom of the third reinforcement body and contact the top and bottom of the inner enclosure.
According to paragraph 1,
A noise reduction speaker further comprising a fourth reinforcing part, which is fixed to the rear case located behind the main speaker and reduces vibration of the rear case.
According to clause 11,
The fourth reinforcing part includes a first reinforcing member having a strip shape extending in a ring shape; and
A noise reduction speaker including a second reinforcing member extending radially from the center of the first reinforcing member.
Front case where main speaker and woofer are installed;
A port portion located at the rear of the front case and forming a conduit through which air moves;
an inner case portion that is inserted into the front case, supports the front case, and is installed in a shape that surrounds the rear side of the woofer; and
A noise reduction speaker comprising: a rear case having a connection hole connected to the port portion and coupled to the rear of the inner case.
According to clause 13,
The inner case portion includes a rectangular inner frame portion extending along an inner edge of the front case;
A first inner reinforcement part installed at a corner of the inner frame part to reinforce the structural rigidity of the inner frame part;
an inner enclosure installed to surround the rear of the woofer; and
A noise reduction speaker comprising a second inner reinforcement part, which is installed in the shape of a plate with holes on the upper and lower sides of the inner enclosure, and connects the inner frame part and the inner enclosure.
According to clause 14,
A noise reduction type speaker in which the inner frame portion, the first inner reinforcing portion, the inner enclosure, and the second inner reinforcing portion are integrally injection molded.
According to clause 14,
The first inner reinforcement part is installed in the shape of a partition at the four corners of the inner frame part, and forms an inner space with a triangular cross-section together with the inner frame part.
According to clause 14,
The second inner reinforcement part includes a plate-shaped first inner frame located on an upper side of the inner enclosure, connecting the inner frame part and the inner enclosure, and having a first inner connection hole through which air moves; and
A noise reduction speaker comprising: a plate-shaped second inner frame located below the inner enclosure, connecting the inner frame portion and the inner enclosure, and having a second inner connection hole through which air moves.
According to clause 14,
A noise reduction speaker further comprising a plate-shaped third inner reinforcement part located between the inner enclosure and the rear case, molded integrally with the inner enclosure, and having an inner ventilation hole for air movement. .
According to clause 13,
A noise reduction speaker further comprising a fourth reinforcing part, which is fixed to the rear case located behind the main speaker and reduces vibration of the rear case.
According to clause 14,
A noise reduction speaker further comprising: a fifth inner reinforcement part installed between the inner enclosure and a central hole for mounting the main speaker, and reinforcing a side of the inner enclosure.

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