KR20230163671A - Frequency variable speaker - Google Patents

Abstract

The present invention relates to a frequency variable speaker, which includes a front case where a main speaker and a side speaker are installed, a port portion located at the rear of the front case and forming a conduit through which air moves, and a connection hole connected to the port portion. It is installed in the rear case and the port portion coupled to the rear of the front case, and includes a first adjusting portion that adjusts the open cross-sectional area of the inner passage provided in the port portion by a plate shape that rotates by receiving electric energy.

Description

Frequency variable speaker {FREQUENCY VARIABLE SPEAKER}

The present invention relates to a frequency variable speaker that can be tuned to a user's desired frequency value by adjusting the cross-sectional area of the port portion.

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 purposes. 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.

A port portion for amplifying bass sounds may be installed in the speaker. The port portion is shaped like a pipe and is shaped like a conduit connecting the inside and outside of the speaker. Among the sounds generated from the speaker, the low sound is amplified through the port portion and then moves to the outside of the speaker.

Conventional speakers have a problem in that it is difficult to change the frequency of the output sound because the shape of the port portion cannot be changed.

Additionally, since the cross-sectional area of the passage provided on the inside of the conventional port unit cannot be adjusted, it is difficult to change the low-frequency frequency of the output sound.

The background technology of the present invention is published in Republic of Korea Patent Publication No. 10-2027478 (registered on September 25, 2019, title of invention: Speaker with improved effect of port resonance).

The purpose of the present invention is to provide a frequency variable speaker that can change the frequency of sound output from the speaker.

Another object of the present invention is to provide a frequency variable speaker that can change the frequency by opening and closing the inner passage of the port portion or adjusting the open cross-sectional area of the inner passage.

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 frequency variable speaker according to the present invention for solving the problems described above has a technical feature of changing the frequency of the output sound by adjusting the open cross-sectional area of the inner passage provided in the port portion.

Specifically, when the first driving unit operates to rotate the rotating member, the open area of the inner passage is adjusted to change the frequency of the sound output through the port unit.

In addition, according to the present invention, when the second driving part is operated to rotate the opening and closing gear part, the open area of the inner passage is adjusted by the movement of the moving wing part, so that the frequency of the sound output through the port part can be changed.

The frequency variable speaker according to the present invention has a front case where the main speaker and side speakers are installed, a port portion located at the rear of the front case and forming a pipe through which air moves, and a connection hole connected to the port portion. It is installed on the rear case and the port portion coupled to the rear of the front case and includes a first adjustment portion that adjusts the open cross-sectional area of the inner passage provided in the port portion by a plate shape that rotates by receiving electric energy.

In addition, the first control part is connected to a fixing bracket fixed to the port part, a first driving part that is fixed to the fixing bracket and supplies rotational power by receiving electric energy, and the first output shaft of the first driving part, and is connected to the inner side by a rotating motion. It includes a rotating member that adjusts the open cross-sectional area of the passage.

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 frequency variable speaker according to the present invention has a front case where the main speaker and side speakers are installed, a port portion located at the rear of the front case and forming a pipe through which air moves, and a connection hole connected to the port portion. It is installed on the rear case and the port portion coupled to the rear of the front case, and includes a second adjusting portion that moves to the center of the inner passage provided in the port portion or moves toward the outside of the port portion and adjusts the open cross-sectional area of the inner passage.

In addition, the second control unit includes a motor bracket fixed to the port portion, a second drive unit fixed to the motor bracket and supplied with electric energy to supply rotational power, and a second control unit connected to the second output shaft of the second drive unit and together with the second output shaft. It includes a driving gear that rotates and has gears formed along the outer circumference, and an opening and closing gear portion that is installed at the end of the port portion and is moved by a gear that rotates in engagement with the driving gear to adjust the open cross-sectional area of the inner passage.

In addition, the opening and closing gear part is fixed to the end of the port portion and includes a fixing plate having a first guide protrusion, and a first guide hole portion installed in a position facing the fixing plate and having a long hole shape where the first guide protrusion is inserted and caught, and is driven. The gear that engages and rotates with the gear is formed along the outer peripheral surface of the rotating plate, and the central protrusion that is located between the fixed plate and the rotating plate and protrudes toward the fixed plate is inserted into the hole provided in the fixed plate to become the center of rotation and turns the rotating plate. It includes a moving wing portion having a second guide protrusion protruding toward the second guide protrusion.

In the frequency variable speaker according to the present invention, the first control unit or the second control unit is operated to adjust the opening area of the inner passage, so that the frequency of the sound output through the port unit can be adjusted to satisfy the user's various preferences.

In addition, in the present invention, the first driving unit operates to precisely control the rotation of the rotating member to change the frequency, so that the tuning of the frequency can be precisely controlled.

In addition, in the present invention, the second driving unit operates to precisely control the rotation of the rotary plate to change the frequency, so the tuning of the frequency can be precisely controlled.

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 frequency-tunable speaker according to an embodiment of the present invention.
Figure 2 is an exploded perspective view of a frequency-tunable speaker according to an embodiment of the present invention.
Figure 3 is a front view showing the internal configuration of a frequency-tunable speaker according to an embodiment of the present invention.
Figure 4 is a perspective view showing a first adjustment unit according to an embodiment of the present invention.
Figure 5 is an exploded perspective view of the first control unit according to an embodiment of the present invention.
Figure 6 is a perspective view showing a first driving unit and a rotating member according to an embodiment of the present invention.
Figure 7 is a side view showing a state in which the first pipe portion is opened by the rotating member according to an embodiment of the present invention.
Figure 8 is a side view showing a state in which a rotating member shields a portion of the first pipe portion according to an embodiment of the present invention.
Figure 9 is a side view showing a state in which the rotating member shields most of the first pipe portion according to an embodiment of the present invention.
Figure 10 is a perspective view showing a second control unit according to an embodiment of the present invention.
Figure 11 is a perspective view showing a state in which the moving wing portion is moved and a portion of the first pipe portion is opened according to an embodiment of the present invention.
Figure 12 is a perspective view showing a state in which the moving wing portion is moved and the first pipe portion is opened according to an embodiment of the present invention.
Figure 13 is an exploded perspective view of an opening and closing gear unit according to an embodiment of the present invention.
Figure 14 is an exploded perspective view of the fixed plate and moving wing portion according to an embodiment of the present invention.
Figure 15 is a perspective view showing a state in which the moving wing portion is coupled to the fixed plate according to an embodiment of the present invention.
Figure 16 is a perspective view of an opening and closing gear unit according to an embodiment of the present invention.
Figure 17 is a perspective view showing a state in which the moving wing portion is moved outward according to an embodiment of the present invention, thereby increasing the opening and closing area of the inner passage.
Figure 18 is a perspective view showing a state in which the movable wing portion according to an embodiment of the present invention is moved outward and the inner tube is maximally opened.

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 frequency-tunable speaker (1) according to an embodiment of the present invention, Figure 2 is an exploded perspective view of a frequency-tunable speaker (1) according to an embodiment of the present invention, and Figure 3 is a perspective view of the frequency-tunable speaker (1) according to an embodiment of the present invention. This is a front view showing the internal configuration of the frequency-tunable speaker 1 according to an embodiment.

As shown in FIGS. 1 to 3, the frequency variable speaker 1 according to an embodiment of the present invention has a first adjustment unit 500 located at the opening of the inner passage 58 provided in the port unit 50. By adjusting the area, the frequency of the low band is changed. The port portion 50 is installed in a fixed state, and the first adjustment portion 500 is installed at the end of the port portion 50 to adjust the opening area of the inner passage 58.

The frequency variable speaker 1 is provided with a pipe-shaped port portion 50 for reinforcing low sounds, and an inner passage 58 through which air and sound move is provided inside the port portion 50. When adjusting the open area of the inner passage 58, the low-band frequency is changed, so the first adjustment unit 500 is operated to adjust the open area of the inner passage 58.

The first control unit 500 provided in the first control unit 500 operates using the power of a motor and adjusts the open cross-sectional area of the inner passage 58. Because the operation of the first control unit 500 adjusts the open area of the inner passage 58, which is a passage through which sound or sound moves, the output frequency value of the frequency variable speaker 1 can be adjusted.

The frequency variable speaker (1) according to an embodiment of the present invention includes a front case (10), a main speaker, a side speaker (30), a port portion (50), an inner enclosure (60), a rear case (70), and It includes at least one of the reinforcement unit 80, the display unit 400, and the first control unit 500.

The front case 10 and rear case 70, which form the external shape of the frequency variable speaker 1, can be transformed into various shapes, such as spheres or cylinders. The front case 10 and the rear case 70 according to an embodiment of the present invention form a rectangular parallelepiped shape.

The front case 10 can be modified in various ways within the technical scope in which the speaker is installed. Speakers installed in the front case 10 may include a main speaker 20 and a side speaker 30. The speaker according to one embodiment of the present invention is described separately into the main speaker 20, which is responsible for the main output, and the side speakers 30 installed on both sides of the main speaker 20, but only the main speaker 20 is on the front. Various modifications, such as being used in case 10, are also possible.

The main speaker 20, which has a larger diameter than the side speaker 30, is installed in the central hole 12 forming a hole in the center of the front panel 11. Side speakers 30 are installed on both sides of the main speaker 20, respectively. Two side speakers 30 according to an embodiment of the present invention are installed on each side of the main speaker 20. Of course, the number and installation positions of the main speaker (20) and side speakers (30) can be changed depending on the usage environment or customer needs.

The front case 10 is shaped like a square box with an open rear end, and forms the front of the frequency variable speaker 1. 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. 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 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. The port portion 50 is installed in the mounting space 74 provided between the front case 10 and the rear case 70, and is connected to the rear case 70 through the connection hole 72 provided in the rear case 70. ) forms a passage through which sound moves to the outside of the

The port portion 50 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 frequency variable speaker (1). Air on the outside of the frequency variable speaker (1) may move to the inside of the frequency variable speaker (1) through the port portion (50).

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

The port portion 50 may be formed of pipes of various shapes, including straight pipes. The port portion 50 according to an embodiment of the present invention is located above the main speaker 20 and has the shape of a circular pipe bent into an “L” shape. One end of the port portion 50 is connected to the rear case 70, and the other end of the port portion 50 is located in the mounting space 74.

Since the cross section of the port portion 50 is formed as a circular cross section, fluid resistance is reduced compared to a square cross section, thereby reducing friction generated when fluid flows, and improving energy loss to reduce sound source loss.

One end of the port portion 50 according to an embodiment of the present invention communicates with the connection hole 72 provided in the rear case 70, and the other end of the port portion 50 is connected to the inside of the frequency variable speaker 1. It connects. 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 of the front case 10. The first pipe portion 52 has a circular pipe shape.

The first conduit portion 52 is fixed to the rear of the front case 10 by a port bracket 56. The port bracket 56 is fixed to the rear of the front case 10, and the first conduit portion 52 is fixed to the port bracket 56 located in the opposite direction to 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 frequency variable 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. In addition, since the part where the first pipe part 52 is bent into the second pipe part 54 is curved, the loss of fluid energy can be minimized.

Hereinafter, it will be explained that the tuning frequency changes depending on the opening area of the inner passage 58 provided in the port portion 50.

Factor Print L 36.04810267 cm input D 9 cm input N One place input V(b) 31 Liter input f(b) 38 Hz input k 0.732 (a constant)

In the above, the port is not the port unit 50 according to an embodiment of the present invention, but is explained by taking a general port used in a speaker as an example. The above calculation formula is for knowing that the tuning frequency changes according to the change in port length. D is the diameter of the inner passage 58 provided in the port. The box volume, V, is the volume of the case where the speaker is installed. The calculation formula for the port length is defined as above, and if the above formula is summarized for the tuning frequency F, it becomes the formula below.

Factor Print f(b) 38 Hz input D 9 cm input N One place input V(b) 31 Liter input L 36.04810267 cm input k 0.732 (a constant)

The equation for the tuning frequency F as above can be checked, and based on this, the tuning frequency for the diameter (D) of different ports can be checked. The diameter length was set to 7cm, 8cm, and 9cm to calculate each tuning frequency. This shows that the larger the port diameter, the larger the tuning frequency. If the tuning frequency is low, you can set the frequency variable speaker (1) so that you can hear lower sounds. As shown in the table below, if the port diameter is 7cm in length, the tuning frequency is 30.07643Hz.

Factor Print f(b) 30.07643 Hz input D 7 cm input N One place input V(b) 31 Liter input L 36.0481 cm input k 0.732 (a constant)

As shown in the table below, if the port diameter is 8cm in length, the tuning frequency is 34.07152Hz.

Factor Print f(b) 34.07152 Hz input D 8 cm input N One place input V(b) 31 Liter input L 36.0481 cm input k 0.732 (a constant)

As shown in the table below, if the port diameter is 9cm in length, the tuning frequency is 38Hz.

Factor Print f(b) 38 Hz input D 9 cm input N One place input V(b) 31 Liter input L 36.0481 cm input k 0.732 (a constant)

A graph of the tuning frequency for each port length is as follows.

As shown in the graph and table, the tuning frequency can be checked by changing the value of D, which is the diameter of the port, in order to check the correlation between the cross-sectional area of the port and the tuning frequency. As mentioned above, the wider the port diameter, the higher the tuning frequency. If the tuning frequency is lowered, you can set the speaker so that you can hear lower sounds. As the port diameter becomes smaller, the tuning frequency can be set to a lower range.

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.

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 rear case 70 can be modified in various ways within the technology 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 is fixed to the front case 10. Between the front case 10 and the rear case 70, a mounting space 74 is formed for installing the port portion 50, the inner enclosure 60, the reinforcement portion 80, and the first adjustment portion 500. do.

The rear case 70 is provided with a connection hole 72 that communicates with the second conduit portion 54 of the port portion 50. Accordingly, sound moving through the port portion 50 may propagate to the outside of the rear case 70 through the connection hole 72.

The reinforcement portion 80 is installed in the shape of a plate with holes on the upper and lower sides of the inner enclosure 60, and restrains the vertical movement of the inner enclosure 60. In addition, the reinforcing part 80 reinforces the structural rigidity of the front panel 11, the side panel 17, the inner enclosure 60, and the rear case 70, and makes it easier to distribute stress, thereby reducing vibration and improving component stability. durability can be improved.

An inner hole 82, which is a hole through which air moves, is formed in the plate-shaped reinforcement portion 80. Therefore, the spaces located on both sides of the reinforcement portion 80 are connected to each other through the inner hole 82.

The reflected wave or standing wave generated inside the frequency variable speaker (1) passes through the inner hole (82) and its speed is reduced. The reflected wave and the standing wave enter the inner hole (82) and then exit the inner hole (82) again, generating a vortex. These vortices act as aerodynamic drag and slow down the standing wave. Since the inner hole 82 is formed in the reinforcement part 80, the spaces on both sides of the reinforcement part 80 are connected to each other and the resonance space is expanded, thereby providing improved sound quality.

As shown in Figure 1, the display is installed on the front of the front case 10 and delivers various information to the user through the screen. The display can inform the user of changes in low frequencies.

The display unit 400 uses a liquid crystal panel and outputs the operating status of the frequency variable speaker 1 through the screen. Equalizer setting information can be provided to the user through the display unit 400, and the rotation angle of the rotation member 530 provided in the first adjustment unit 500 can also be displayed.

FIG. 4 is a perspective view showing the first adjusting unit 500 according to an embodiment of the present invention, and FIG. 5 is an exploded perspective view of the first adjusting unit 500 according to an embodiment of the present invention.

As shown in FIGS. 2, 4, and 5, the first control unit 500 is located inside the mounting space 74 formed between the front case 10 and the rear case 70, and the port portion It is installed at the end of (50). The first control unit 500 is capable of various modifications within the technical idea of adjusting the open cross-sectional area of the inner passage 58 provided in the port unit 50 by having a plate shape that rotates by receiving electric energy. The first adjusting unit 500 according to an embodiment of the present invention includes a fixing bracket 510, a first driving unit 520, a rotating member 530, and a rotating support unit 540.

The fixing bracket 510 is fixed to the port portion 50 and various modifications are possible within the technical concept of supporting the first driving portion 520. The fixing bracket 510 according to an embodiment of the present invention includes a first fixing bracket 512 and a second fixing bracket 514.

The first fixing bracket 512 is located in the mounting space 74 formed between the front case 10 and the rear case 70. Additionally, the first fixing bracket 512 is fixed to one side (right side in FIG. 5) of the port portion 50. The first fixing bracket 512 according to an embodiment of the present invention is a panel bent into an “L” shape and is fixed to the upper side of the first pipe portion 52.

The second fixing bracket 514 is installed in succession to the first fixing bracket 512, and has a space inside where the first driving part 520 is seated. The bottom surface of the second fixing bracket 514 is provided with a guide hole 516 for installing the first output shaft 522 of the first driving unit 520. The first driving part 520 uses a motor, and the second fixing bracket 514 has an inner space into which the first driving part 520 is inserted.

The side of the second fixing bracket 514 having an inner space is open, and the first driving part 520 is inserted into the side of the second fixing bracket 514 and mounted on the inside of the second fixing bracket 514. .

The first driving unit 520 is fixed to the fixing bracket 510, and various modifications are possible within the technical idea of supplying rotational power by receiving electrical energy. The first driving unit 520 according to an embodiment of the present invention uses a step motor capable of accurate angle control and rotates the rotating member 530 at a set angle. The first driving unit 520 may use a servo motor.

The first output shaft 522 protruding to the outside of the first driving unit 520 is installed while being inserted into the guide hole 516.

Figure 6 is a perspective view showing the first driving unit 520 and the rotating member 530 according to an embodiment of the present invention. As shown in FIGS. 5 and 6, the rotating member 530 is connected to the first output shaft 522 of the first driving unit 520, and adjusts the open cross-sectional area of the inner passage 58 through a rotating operation. Within technological thought, it can be transformed into various shapes. The rotating member 530 according to an embodiment of the present invention includes a rotating plate 532 and a rotating connecting portion 534.

The rotating plate 532 has a shape corresponding to the longitudinal cross-section of the inner passage 58, and various modifications are possible within the technical idea of adjusting the opening rate of the inner passage 58 through a rotating operation. The rotating plate 532 according to an embodiment of the present invention is a circular plate, and the inner passage 58 of the corresponding port portion 50 also has a circular passage.

The shape of the rotating plate 532 can be changed depending on the shape of the inner passage 58. If the shape of the inner passage 58 has a rectangular longitudinal cross-section, the rotating plate 532 also has a rectangular plate shape. The rotating plate 532 rotates around the first output shaft 522, and can open and close the inner passage 58 or adjust the degree of opening of the inner passage 58 through a rotating motion.

The rotation connection portion 534 protrudes from the side of the rotation plate 532 and extends in the vertical direction, and various modifications are possible within the technical idea of being connected to the first output shaft 522. The rotation connection portion 534 according to an embodiment of the present invention has a pipe shape extending in the vertical direction and is fixed to the side of the rotation plate 532.

The cross-section of the first output shaft 522 is square, and the groove provided on the upper side of the rotary connection portion 534 for inserting the first output shaft 522 is also square in longitudinal cross-section. Accordingly, when the first output shaft 522 is inserted into the groove provided on the upper side of the rotation connection portion 534 and rotates, the rotation connection portion 534 rotates together with the first output shaft 522.

Since the first driving part 520 uses a step motor, accurate rotation angle control is possible, and the opening rate of the inner passage 58 can be adjusted by the operation of the first driving part 520. The low-band frequency can be adjusted by adjusting the open cross-sectional area of the port portion 50.

The rotation support portion 540 is fixed to the port portion 50, and various modifications are possible within the technical idea of rotatably supporting the upper and lower sides of the rotation member 530. The rotation support portion 540 uses an oilless bearing and serves to support and guide the rotation of the rotation connection portion 534, which is the center of rotation. The rotation support unit 540 according to an embodiment of the present invention includes a first bearing 542 and a second bearing 544.

The first bearing 542 is a ring-shaped bearing that rotatably supports the upper side of the rotating member 530 and is fixed to the end of the port portion 50. The second bearing 544 is a ring-shaped bearing that rotatably supports the lower side of the rotating member 530 and is fixed to the end of the port portion 50.

The first bearing 542 and the second bearing 544 have a ring shape and are fixed to the end of the first pipe portion 52 forming a concave groove. The upper side of the rotary connection part 534 is inserted into the inside of the first bearing 542, and the lower side of the rotation connection part 534 is inserted into the inside of the second bearing 544. Therefore, the rotation member 530 rotates around the rotation support portion 540.

Hereinafter, the operating state of the frequency variable 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 frequency variable speaker 1 through the port portion 50, thereby reinforcing low sound.

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.

The control unit installed inside the frequency variable speaker 1 can determine the rotation angle and position of the rotating member 530 using a sensor and calculate the open area of the inner passage 58 based on this.

In addition, the measured value of the low-band frequency generated by the frequency variable speaker (1) is also transmitted to the control unit.

The control unit operates the first driving unit 520 by comparing the tuning frequency set by the user with the actual frequency. The rotating member 530 rotates due to the rotational power of the first driving unit 520, and the opening rate of the inner passage 58 provided in the port portion 50 is adjusted by the rotation of the rotating member 530.

The change value of the frequency adjusted by the first control unit 500 may be displayed through the display unit 400 or the user's smartphone app.

Figure 7 is a side view showing a state in which the rotating member 530 opens the first pipe portion 52 according to an embodiment of the present invention. As shown in FIG. 7, when the frequency output through the port unit 50 is set high, the first driving unit 520 is used to increase the opening rate of the inner passage 58 provided in the port unit 50. Operate it.

The rotation member 530 is rotated by the operation of the first driving unit 520, and the rotation member 530 is positioned perpendicular to the inner passage 58 provided at the entrance of the first pipe unit 52. Since blockage of the inner passage 58 by the rotating member 530 is minimized, the open area of the inner passage 58 can be maximized, and the opening rate of the inner passage 58 is also increased.

The larger the open area of the inner passage 58 that is not blocked by the rotating member 530, the higher the tuning frequency. Accordingly, when the tuning frequency is set high, the first driving unit 520 is operated so that the rotating member 530 is perpendicular to the cross section of the inner passage 58 formed at the inlet of the first pipe portion 52.

Figure 8 is a side view showing a state in which the rotating member 530 shields a portion of the first pipe portion 52 according to an embodiment of the present invention. As shown in FIG. 8, when the frequency output through the port unit 50 is set to a value in the middle region, the opening rate of the inner passage 58 provided in the port unit 50 is adjusted to the middle region. For this purpose, the first driving unit 520 is operated.

The rotation member 530 is rotated by the operation of the first driving unit 520, and the rotation member 530 is rotated to be inclined obliquely with respect to the inner passage 58 provided at the entrance of the first pipe unit 52. The opening rate of the inner passage 58 by the rotating member 530 reaches between 30% and 70%.

Since a portion of the inner passage 58 is blocked by the rotating member 530, the tuning frequency value is lowered.

Figure 9 is a side view showing a state in which the rotating member 530 shields most of the first pipe portion 52 according to an embodiment of the present invention. As shown in FIG. 9, when the frequency output through the port unit 50 is set to a value in the low frequency region, the opening rate of the inner passage 58 provided in the port unit 50 is adjusted to the lower region. For this purpose, the first driving unit 520 is operated.

The rotation member 530 is rotated by the operation of the first driving unit 520, and the rotation member 530 rotates in a direction that blocks the inner passage 58 provided at the entrance of the first pipe unit 52. At this time, the opening rate of the inner passage 58 by the rotating member 530 reaches between 0% and 29%.

Since most of the inner passage 58 is blocked by the rotating member 530, the tuning frequency is further lowered.

As shown in Figures 2 and 3, the frequency variable speaker 1 according to an embodiment of the present invention can structurally change the bass sound compared to a speaker with only the port portion 50 installed, thus satisfying various tastes of users. You can do it.

In addition, the frequency-variable speaker 1 has a tuning frequency for each area of the inner passage 58 input to the control unit, and the low-range frequency output through the sensor can be measured. Therefore, when the user inputs the desired low frequency into the device, the control unit operates the first adjustment unit 500 accordingly to adjust the open area of the inner passage 58. When the opening rate of the inner passage 58 provided in the port portion 50 is adjusted, the value of the output low-range frequency is also adjusted to obtain the output value desired by the user.

Meanwhile, current tuned frequency information can be provided using the display unit 400 or the user's smartphone app, and the output frequency can also be changed.

Figure 10 is a perspective view showing the second control unit 600 according to an embodiment of the present invention, and Figure 11 is a moving wing unit 680 according to an embodiment of the present invention is moved to the first conduit unit 52. ) is a perspective view showing a partially open state.

As shown in FIGS. 10 and 11, the second control unit 600 is installed at the free end of the first conduit portion 52 to adjust the opening/closing rate of the inner passage 58. The second control unit 600 is installed in the port unit 50 and moves to the center of the inner passage 58 provided in the port unit 50 or moves toward the outside of the port unit 50 and moves through the inner passage (58). 58) to adjust the opened cross-sectional area. The second control unit 600 according to an embodiment of the present invention is located inside the mounting space 74 formed between the front case 10 and the rear case 70, and is located at the end of the port portion 50. It is installed to adjust the opening area of the inner passage (58).

The second control unit 600 according to an embodiment of the present invention includes a motor bracket 610, a second driving unit 620, a driving gear 630, and an opening/closing gear unit 640.

The motor bracket 610 is fixed to the port portion 50 and various modifications are possible within the technical idea of supporting the second driving portion 620. The motor bracket 610 according to an embodiment of the present invention is fixed near the free end of the first pipe portion 52. The motor bracket 610 surrounds the outside of the second driving unit 620 and is fixed to the outside of the first conduit unit 52.

The second driving unit 620 is fixed to the motor bracket 610, and various types of driving devices can be used within the technology of supplying rotational power by receiving electrical energy. The second driving unit 620 according to an embodiment of the present invention uses a step motor, and a driving gear 630 is connected to the second output shaft 622 of the second driving unit 620.

The second driving part 620 rotates the driving gear 630 at a set angle, and the opening and closing gear part 640 engaged with the driving gear 630 is operated to adjust the open cross-sectional area of the inner passage 58.

The driving gear 630 is connected to the second output shaft 622 of the second driving unit 620 and rotates together with the second output shaft 622, and a gear is formed along the outer circumference of the driving gear 630. The drive gear 630 is a circular plate-shaped gear.

Figure 12 is a perspective view showing a state in which the moving wing part 680 according to an embodiment of the present invention is moved and the first pipe part 52 is opened, and Figure 13 is an opening and closing gear part according to an embodiment of the present invention. This is an exploded perspective view of (640).

As shown in Figures 12 and 13, the opening and closing gear part 640 is installed at the end of the port part 50, and is moved by a gear that rotates in engagement with the drive gear 630 to increase the open cross-sectional area of the inner passage 58. Various modifications are possible within the technical idea of controlling .

The opening and closing gear unit 640 according to an embodiment of the present invention includes a fixed plate 650, a rotating plate 670, and a moving wing unit 680. The moving wing portion 680 is located between the fixed plate 650 and the rotating plate 670, and operates in an aperture manner to adjust the open area of the inner passage 58.

The fixing plate 650 is a ring-shaped plate fixed to the end of the port portion 50, and has a hole connected to the inner passage 58 on the inside. The fixing plate 650 is fixed to the end of the first pipe portion 52 and rotation is restricted. The fixing plate 650 according to an embodiment of the present invention includes a fixing body 652, a fixing hole 654, and a first guide protrusion 656.

The fixing body 652 extends in a ring shape and is fixed to the inlet of the first conduit portion 52. The inside of the fixing body 652 is provided with a hole communicating with the inner passage 58, and the outside of the fixing body 652 has a circular shape.

A plurality of fixing holes 654 are formed along the circumference of the fixing body 652. The fixing hole 654 is a hole into which the central protrusion 684 of the moving wing portion 680 is inserted. A plurality of first guide protrusions 656 are installed along the circumferential direction of the fixing body 652. The first guide protrusion 656 has a protrusion shape that protrudes from the fixed body 652 in a direction toward the rotating plate 670.

The rotating plate 670 is installed at a position facing the fixed plate 650. The rotating plate 670 is a plate extending in a ring shape like the fixing plate 650, and has a hole connected to the inner passage 58 on the inside. A gear engaging the driving gear 630 is provided on the outside of the rotation plate 670, and a hole portion for guiding the movement of the moving wing portion 680 is provided on the inside.

The rotating plate 670 according to an embodiment of the present invention includes a rotating body 672, a first guide hole portion 674, a second guide hole portion 676, and a driven gear 678.

The rotating body 672 has a plate shape extending into a ring shape, and a first guide hole portion 674 and a second guide hole portion 676 are provided inside the rotating body 672.

The first guide hole portion 674 forms a long hole-shaped hole into which the first guide protrusion 656 of the fixing plate 650 is inserted and caught. The first guide hole portion 674 is provided in plurality along the circumferential direction and forms a long hole-shaped hole in the rotating body 672. The rotation plate 670 can rotate by the length of the first guide hole portion 674.

The driven gear 678 forms a gear along the outer circumference of the rotating body 672 and is therefore engaged with the driving gear 630. When the driving gear 630 rotates, the rotation plate 670 rotates together with the driven gear 678 engaged with the driving gear 630.

The second guide hole portion 676 forms an elongated hole in the rotating body 672 into which the second guide protrusion 686 of the moving wing portion 680 is inserted. The first guide hole portion 674 forms a long hole along the circumferential shape, and the second guide hole portion 676 forms an acute angle with the first guide hole portion 674 and forms a long hole toward the inside of the rotating body 672. The second guide hole portion 676 may be installed spirally and obliquely toward the center of the rotating body 672.

The first guide hole 674 defines the angle at which the rotation plate 670 rotates, and the second guide hole 676 guides the moving wing 680 to the center of the inner passage 58 or guides the inner passage 670 to the center of the inner passage 58. It guides the movement in a direction away from the center of the passage 58.

Figure 14 is an exploded perspective view of the fixed plate 650 and the moving wing part 680 according to an embodiment of the present invention, and Figure 15 is an exploded perspective view of the fixed plate 650 and the moving wing part according to an embodiment of the present invention. (680) is a perspective view showing the coupled state, and Figure 16 is a perspective view of the opening and closing gear unit 640 according to an embodiment of the present invention.

As shown in FIGS. 14 to 16, the moving wing portion 680 is located between the fixed plate 650 and the rotating plate 670, and is moved by the rotation of the rotating plate 670 to move the inner passage 58. ), various modifications are possible within the technical idea of controlling the open area.

The movable wing portion 680 is provided with a central protrusion 684, and the central protrusion 684 protruding toward the fixing plate 650 is inserted into a hole provided in the fixing plate 650 to secure the movable wing portion 680. becomes the center of rotation. In addition, the moving wing portion 680 is provided with a second guide protrusion 686, and the second guide protrusion 686 protruding toward the rotating plate 670 is inserted into the second guide hole portion 676 to form the moving wing portion (686). 680) guides the movement.

The moving wing unit 680 according to an embodiment of the present invention includes a wing body 682, a central protrusion 684, and a second guide protrusion 686.

The wing body 682 is located between the fixed plate 650 and the rotating plate 670, and a plurality of wing bodies are installed along the fixed body 652. The wing body 682 has a plate shape and has an external shape with three curved surfaces. The wing body 682 has a shape close to a triangle, and the part corresponding to the vertex is installed toward the center of the inner passage 58.

The central protrusion 684 protrudes from the wing body 682 and is inserted into the fixing hole 654 provided in the fixing plate 650. Therefore, the wing body 682 rotates around the central protrusion 684.

The second guide protrusion 686 protrudes from the wing body 682 and is inserted into the second guide hole portion 676 provided in the rotation plate 670. When using the wing body 682 as a reference, the second guide protrusion 686 protrudes in a direction opposite to the central protrusion 684.

When the second guide protrusion 686 is moved by rotation of the rotation plate 670 while the second guide protrusion 686 is inserted into the second guide hole portion 676, the wing body 682 is the second guide. By moving together with the protrusion 686, the open area of the inner passage 58 can be adjusted.

To describe the operation of the first adjusting unit 500 in more detail, when the second driving unit 620 is operated to rotate the driving gear 630 at a set angle, the driven gear 678 engaged with the driving gear 630 rotates. The rotation plate 670 rotates together with the driven gear 678, and the second guide protrusion 686 located inside the second guide hole portion 676 also moves due to the rotation of the rotation plate 670.

When the second guide protrusion 686 moves in the inner direction of the second guide hole portion 676, the second guide protrusion 686 is caught at the end of the second guide hole portion 676 and the moving wing portion 680 moves to the inner side. Block as much of the passage (58) as possible. Since the entrance to the inner passage 58 provided in the port portion 50 is almost blocked, the open area of the port portion 50 becomes small, so the value of the tuning frequency is lowered.

Figure 17 is a perspective view showing a state in which the moving wing portion 680 is moved outward according to an embodiment of the present invention, thereby increasing the opening and closing area of the inner passage 58. As shown in FIG. 17, when the rotation plate 670 is rotated counterclockwise (based on FIG. 17), the first guide protrusion 656 is inserted into the first guide hole portion 674, so that the rotation plate rotates counterclockwise. The rotation is guided.

Additionally, the second guide protrusion 686 moves in a direction toward the outside of the rotation plate 670 along the second guide hole portion 676. Since the central protrusion 684 of the movable wing portion 680 is inserted into the fixing hole 654 of the fixing plate 650, each movable wing portion 680 rotates around the central protrusion 684. As the moving wing portion 680 rotates counterclockwise, the open area of the inner passage 58 gradually expands.

For example, when the rotation plate 670 rotates 5.3°, the moving wing portion 680 rotates 15° around the central protrusion 684 and adjusts the opening rate of the inner passage 58. The central protrusion 684 of the moving wing 680 and the second guide protrusion 686 are installed at a set distance, and the rotation of the fixed plate 650 to which the central protrusion 684 is connected is restricted. Only the rotation plate 670 to which the second guide protrusion 686 is connected rotates. Accordingly, the plurality of moving wings 680 are expanded in the shape of an aperture to open the inner passage 58.

Figure 18 is a perspective view showing a state in which the moving wing portion 680 according to an embodiment of the present invention is moved outward and the inner tube is fully opened. As shown in FIG. 18, when the rotation plate 670 is further rotated counterclockwise (based on FIG. 18), the first guide protrusion 656 is caught on the end of the rotating first guide hole portion 674 and thus rotates. The rotation of the plate 670 is stopped.

Additionally, the second guide protrusion 686 moves in a direction toward the outside of the rotation plate 670 along the second guide hole portion 676 and is caught at the end of the second guide hole portion 676. The moving wing portion 680 is further rotated counterclockwise to maximize the open area of the inner passage 58.

For example, when the rotation plate 670 rotates 10.6°, the moving wing portion 680 rotates 30° around the central protrusion 684 and adjusts the opening rate of the inner passage 58.

As described above, the second control unit 600 operates to adjust the opening area of the inner passage 58 of the port unit 50 in order to adjust the frequency value at which tuning is to be performed according to the target frequency value set by the user. When the second driving unit 620 operates to rotate the opening and closing gear unit 640, the open area of the inner passage 58 is adjusted by moving the moving wing unit 680, and the frequency of the sound output through the port unit 50 is adjusted. can be changed.

Meanwhile, the fixed plate 650, the rotating plate 670, and the moving wing part 680, which constitute the opening and closing gear part 640, are installed inside a separate housing, so the moving wing part 680 is located in front of the fixed plate 650. ) and the rotation plate 670 may be installed in a stacked configuration.

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: Frequency variable speaker
10: Front case 11: Front panel 12: Central hole 13: Side hole 17: Side panel
20: Main speaker 30: Side speaker 32: First speaker 34: Second speaker
50: Port portion 52: First conduit portion 54: Second conduit portion 56: Port bracket 58: Inner passage
60: Inner enclosure
70: Rear case 72: Connection hole 74: Mounting space
80: reinforcement part 82: inner hole
400: Display unit
500: first control unit
510: Fixing bracket 512: First fixing bracket 514: Second fixing bracket 516: Guide hole
520: first driving unit 522: first output shaft
530: Rotating member 532: Rotating plate 534: Rotating connection part
540: Rotating support 542: First bearing 544: Second bearing
600: second control unit
610: Motor bracket
620: second driving unit 622: second output shaft
630: Drive gear
640: Open/close gear unit
650: Fixing plate 652: Fixing body 654: Fixing hole 656: First guide projection
670: Rotating plate 672: Rotating body 674: First guide hole part 676: Second guide hole part 678: Driven gear
680: Moving wing part 682: Wing body 684: Center protrusion 686: Second guide protrusion

Claims (20)

Front case where the main speaker and side speakers are installed;
A port portion located at the rear of the front case and forming a conduit through which air moves;
a rear case having a connection hole connected to the port portion and coupled to the rear of the front case; and
A frequency-variable speaker comprising: a first control unit installed in the port unit and adjusting the open cross-sectional area of the inner passage provided in the port unit by a plate shape that receives electrical energy and rotates.
According to paragraph 1,
The first control unit is located inside a mounting space formed between the front case and the rear case, and is installed at an end of the port portion.
According to paragraph 1,
The first control unit includes a fixing bracket fixed to the port unit;
A first driving unit that is fixed to the fixing bracket and receives electrical energy to provide rotational power; and
A frequency variable speaker comprising: a rotating member connected to the first output shaft of the first driving unit and adjusting the open cross-sectional area of the inner passage through a rotating motion.
According to paragraph 3,
The fixing bracket includes: a first fixing bracket fixed to one side of the port portion located in a mounting space formed between the front case and the rear case; and
A frequency variable type including; a second fixing bracket installed in succession to the first fixing bracket, having a space inside where the first driving part is seated, and having a guide hole on the bottom for installing the first output shaft; speaker.
According to paragraph 3,
The first driving unit uses a step motor, and the frequency variable speaker rotates the rotating member at a set angle.
According to paragraph 3,
The rotating member includes: a rotating plate that has a shape corresponding to the longitudinal cross-section of the inner passage and adjusts the opening rate of the inner passage through a rotating motion; and
A frequency-variable speaker comprising: a rotating connection part that protrudes from a side of the rotating plate, extends in the vertical direction, and is connected to the first output shaft.
According to paragraph 3,
The first control part is fixed to the port part and a rotation support part rotatably supporting the upper and lower sides of the rotary member.
In clause 7,
The rotation support portion includes a ring-shaped first bearing that rotatably supports an upper side of the rotation member and is fixed to an end of the port portion; and
A frequency-variable speaker comprising a ring-shaped second bearing that rotatably supports the lower side of the rotating member and is fixed to an end of the port portion.
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 frequency variable 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,
A frequency variable speaker in which at least one of the front case and the rear case is molded from synthetic resin.
Front case where the main speaker and side speakers are installed;
A port portion located at the rear of the front case and forming a conduit through which air moves;
a rear case having a connection hole connected to the port portion and coupled to the rear of the front case; and
A frequency-variable speaker including; a second control unit installed in the port portion, moving toward the center of the inner passage provided in the port portion or moving toward the outside of the port portion and adjusting the open cross-sectional area of the inner passage; .
According to clause 11,
The second control unit is located inside the mounting space formed between the front case and the rear case, and is installed at an end of the port portion.
According to clause 11,
The second control unit includes a motor bracket fixed to the port unit;
a second driving unit fixed to the motor bracket and receiving electrical energy to provide rotational power;
a drive gear connected to the second output shaft of the second drive unit and rotating together with the second output shaft, and having a gear formed along an outer circumference; and
A frequency variable speaker including; an opening/closing gear unit installed at an end of the port unit and moved by a gear rotating in engagement with the drive gear to adjust the open cross-sectional area of the inner passage.
According to clause 13,
The second driving unit uses a step motor and rotates the driving gear at a set angle.
According to clause 13,
The opening and closing gear part includes a fixing plate fixed to an end of the port part and having a first guide protrusion;
a rotating plate installed at a position facing the fixing plate, including a first guide hole in the shape of a long hole into which the first guide protrusion is inserted and caught, and having a gear rotating in engagement with the driving gear formed along an outer peripheral surface;
It is located between the fixing plate and the rotating plate, and a central protrusion protruding toward the fixing plate is inserted into a hole provided in the fixing plate to become the center of rotation, and is provided with a second guide protrusion protruding toward the rotating plate. A frequency variable speaker including a moving wing unit.
According to clause 15,
The fixing plate includes a fixing body extending in a ring shape; and
It includes; a plurality of fixing holes into which the central protrusion is inserted are installed along the fixing body,
A frequency variable speaker in which a plurality of first guide protrusions are installed along the circumferential direction of the fixed body.
According to clause 16,
The moving wing portion is located between the fixed plate and the rotating plate and includes a plurality of wing bodies installed along the fixed body,
The central protrusion protrudes from the wing body and is inserted into the fixing hole,
A frequency variable speaker in which the second guide protrusion protrudes from the wing body and is inserted into a second guide hole provided in the rotation plate.
According to clause 15,
The rotating plate includes a rotating body extending in a ring shape and including the first guide hole portion;
An outer gear forming a gear along the outer circumference of the rotating body and engaging the driving gear; and
A frequency variable speaker including; a second guide hole portion forming a long hole-shaped hole into which the second guide protrusion is inserted into the rotating body.
According to clause 18,
The first guide hole portion forms a long hole along a circumferential shape, and the second guide hole portion forms an acute angle with the first guide hole portion and forms a long hole toward the inside of the rotating body.
According to clause 11,
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 frequency variable 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.

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