KR102662588B1 - Speaker module capable of tuning frequency characteristics - Google Patents

Abstract

The speaker module of the present invention is mounted between a first space at the top where the driver is mounted, a third space formed opposite to the first space on the opposite side of where the driver is mounted, and between the first space and the third space, and the first space is It includes a second space provided by a tuning structure equipped with at least one ventilation control member at the boundary with the third space or the boundary with the third space, and the second space communicates with the first space and the third space simultaneously, The occurrence of vibration can be eliminated and frequency tuning is possible.

Description

Speaker module capable of tuning frequency characteristics}

The present invention relates to a speaker module capable of controlling abnormal vibration and tuning frequency response characteristics.

Many techniques are known for controlling microspeaker-related frequency characteristics. U.S. Patent Publication No. US2019/0082252 discloses a structure in which a first chamber is placed at the farthest distance from the sound outlet outside the driver including the diaphragm, and the sound outlet is placed on the side of the driver in the opposite space. Korean Patent Publication No. 10-2013-0069362 discloses a structure in which a damping chamber for frequency control is placed on the outside that directly communicates with the sound emitted from the speaker.

However, the above microspeaker is worn on the user's ear, and recently, the need to control abnormal vibration and frequency response characteristics in flat speaker modules integrated into electronic devices such as smartphones has been greatly emphasized.

The background technology of FIG. 7 described below is an example of the applicant's implementation technology to explain the present invention, and does not constitute known technology.

The speaker module in Figure 7 shows an example of a flat speaker module. The driver (D'), where the diaphragm and magnet are located, is placed on one side of the inside of a rectangular thin frame (1'), and the remaining space is used for frequency adjustment. This is the space (10') left for this purpose, and the sound is emitted through the side (12' (side perpendicular to the direction of vibration) where the driver (D') is placed. The frequency is adjusted by drilling a vent hole 14' in the space 10'. However, in this case, there is a disadvantage in that a peak value occurs at the double frequency (2f0), abnormal vibration occurs, and frequency response characteristics deteriorate.

The present invention was developed to overcome the shortcomings of the prior art.

The purpose of the present invention is to provide a speaker module that prevents abnormal vibrations at low frequencies and double frequencies and enables efficient tuning of frequency characteristics.

In order to achieve the above-described object, the present invention is a speaker module, wherein the speaker module includes a first space at the top where the driver is mounted, a third space formed opposite the first space on the other side of where the driver is mounted, and the first space. It is mounted between the space and the third space and includes a second space provided by a tuning structure equipped with at least one ventilation control member at the boundary with the first space or the boundary with the third space, and the second space is A speaker module is provided that communicates with the first space and the third space simultaneously, eliminating the occurrence of abnormal vibration and enabling frequency tuning.
Moreover, in the present invention, the third space is blocked from the drive mounting space and is located on the opposite side of the drive mounting space, the speaker module is radial on the side, a part of the first space communicates with the sound discharge outlet, and the second space and the third space are located on the opposite side of the drive mounting space. A speaker module is provided that is blocked without communicating with the sound discharge outlet, and the second space consists of a small space on the side that communicates with the first space and a large space on the side that communicates with the third space.

The ventilation control member installed at the boundary between the first space and the second space is a mesh, and may be installed at the entrance of the second space or a path connecting the first space and the second space.

The ventilation control member installed at the boundary between the second space and the third space may be a mesh or membrane with a lower ventilation amount than the above mesh.

A first path is provided in the first space to communicate with the tuning structure, the first path is a channel extending from the first space, and air in the first space can flow into the second space through the first path. .

The tuning structure further includes a second path, where the second path is an empty channel extending downward from the lower surface of the second space, and air in the second space can flow into the third space through the second path.

A duct hole is formed on the bottom of the third space, and the duct hole may communicate with the bottom of the second path.

The third space may have the largest volume, and the second space may have the smallest volume.

Additionally, the present invention provides an electronic device including the above speaker module.

According to the present invention, it is possible to prevent abnormal vibration from occurring due to a high peak value occurring at a specific frequency in a side radiating flat speaker module.

According to the present invention, frequency tuning can be optimally performed by improving or changing the size of the intermediate alpha space and the air flow path or mesh or membrane.

Figure 1 is a perspective view of the speaker module of the present invention seen from the outside.
Figure 2 is a bottom view of the speaker module of Figure 1.
Figure 3 is a plan view of the speaker module of the present invention with the upper part removed.
Figure 4 is a cross-sectional view of Figure 3 cut in the height direction based on A1 and A2.
Figure 5 is an enlarged partial perspective view of the first, second and third spaces of the present invention.
Figure 6 is a frequency-sound pressure graph comparing the present invention and current implementation technology.
Figure 7 is a diagram of a speaker module showing the current technology level.

The present invention is characterized by implementing a frequency band tuning structure in the speaker module 1 that is integrated into electronic devices such as smartphones or audio devices, and the following embodiments provide examples to support this. and does not limit the scope of the present invention.

Figure 1 is a perspective view of the speaker module 1 of the present invention seen from the outside.

The speaker module 1 has a thin, flat shape extending in the longitudinal direction, but is not limited to this. A driver (D) consisting of a diaphragm, magnet, yoke, etc. is disposed on one side of the interior of the speaker module (1). The vibration sound of the driver (D) is discharged through the sound outlet (20) located right on the side.

To the left of the driver D, near the middle of the speaker module 1 in the longitudinal direction, a tuning structure 2 having a substantially square shape is disposed when viewed from above. The space to the left of the tuning structure (2) and adjacent to and blocked from the driver (D) is the “rear space” or “third space (S3), which occupies approximately 1/4 to 1/3 of the area of the speaker module (1). ” forms. The upper part above the driver (D), specifically the upper space of the diaphragm, forms the “front space” or “first space (S1).” The space formed by the tuning structure (2) forms the “tuning space” or “second space (S2).” In the present invention, each space is communicated with each other to eliminate abnormal vibration and optimally tune the frequency. In particular, the effect of reducing the sudden occurrence of peak values around 2f0 can be expected.

When viewed from the width direction of the speaker module 1, the tuning structure 2 is not placed in the center position, but rather in a position somewhat biased toward the sound emission outlet 20, which ultimately takes into account the frequency tuning efficiency of the final emitted sound.

FIG. 2 is a bottom view of the speaker module 1 of FIG. 1. The driver (D) is connected to two wires. A duct hole 40 is formed on the lower surface of the third space S3 relatively adjacent to the driver D.

Figure 3 is a plan view of the speaker module 1 of the present invention with the upper part removed, and Figure 4 is a cross-sectional view of Figure 3 cut in the height direction based on A1 and A2.

Referring to the two drawings together, the driver (D) is placed on one side of the speaker module (1). The driver (D) includes a magnet, yoke, plate, coil, etc., and a diaphragm, edge, and suspension are mounted on the top of the driver (D). In the present invention, between the upper surface of the driver D, that is, at least the upper part of the diaphragm, and the inside of the speaker module 1, there is a front space, that is, a first space S1, that extends long in the width and length directions and has a relatively small height. It is characterized by its formation, and any configuration, size and shape of the driver D can be appropriately selected as long as this structure is provided.

A first path 10 is provided in the first space S1 to communicate with the tuning structure 2. The first path 10 is a hollow cylindrical channel extending upward from the side end of the first space S1. One first path 10 is formed, and the first space S1 communicates with the second space S2 only through the first path 10. However, it is not limited to this and it is also possible to have a plurality of first paths 10. The cross-sectional area and length of the first path 10 can be appropriately set according to frequency tuning conditions.

The second space S2 is a space inside the tuning structure 2. The second space S2 is formed from the inlet 24 communicating with the upper end of the first path 10 to the outlet 26 communicating with the third space S3 (see FIG. 5). The inlet 24 and the outlet 26 are relative concepts based on the first space (S1), and sound does not flow in only one direction. A breathable mesh 22 is installed at the inlet 24. However, this can be omitted when installing the mesh 22. The top of the tuning structure 2 is blocked by a cover 202. The cover 202 may be manufactured as a separate part, or alternatively, it may be replaced with the inner surface of the speaker module 1.

The mesh 22 may not be installed at the inlet 24 but may be installed on a side that is in contact with the first space S1, such as the inlet of the first path 10. In other words, a ventilation control member such as the mesh 22 can be installed at the boundary between the first space (S1) and the second space (S2), and in the present invention, “the boundary between space and space” refers to not only each space, but also space and space. It should be understood in a broad sense that includes communicating passages.

The height and space size from the entrance 24 to the cover 202 form a small narrow space (S21), and the height and space of the area beyond this are formed larger to form a wide space (S22), and the two spaces (S21 , S22) are combined to form the second space (S2).

A membrane 28 is installed at the outlet 26. The membrane 28 is a nanomembrane and has impermeability that allows air to pass through but does not allow water to pass through. Therefore, a waterproof effect can be expected. The membrane 28 has relatively less ventilation than the mesh 22. The membrane 28 functions to alleviate abnormal vibration by discharging air pressure applied to the opposite side of the sound outlet 20 due to the side sound emission characteristics.

Instead of a nanomembrane, it is also possible to use a mesh with a tighter standard than the mesh 22.

The tuning structure 2 of the present invention further includes a second path 200 in communication with the outlet 26. The second path 200 is a hollow cylindrical channel extending downward from the bottom of the second space S2. One second path 200 is formed, and the second space S2 communicates with the third space S2 only through the second path 200. However, it is not limited to this and it is also possible to have a plurality of second paths 200. The cross-sectional area and length of the second path 200 can be appropriately set according to frequency tuning conditions.

The third space (S3) of the present invention is the remaining space excluding the first space (S1) and the second space (S3) among the internal spaces of the speaker module (1). A duct hole 40 communicating with the outside is formed on the lower surface of the third space S3, and this duct hole 40 communicates with the lower end of the second path 200, so that some of the air is discharged to the outside. The third space S3 is a flat space with a relatively uniform cross-sectional area along the longitudinal direction, but can be changed in various ways.

In the present invention, the volume of the third space (S3) is the largest, and the volume of the second space (S2) is the smallest. This arrangement is advantageous in that it allows fine control of the characteristics of the second space (S2).

Figure 5 is an enlarged partial perspective view of the first, second, and third spaces (S1, S2, and S3) of the present invention. The air flow is shown along the direction of radiation of the vibration sound, but it goes without saying that air can flow from the third space (S3) to the second space (S2) and back to the first space (S1). The air in the first space (S1) located at the top of the driver (D) communicates with the second space (S2) through the first path (10), and the air in the second space (S2) communicates with the second space (S2) through the second path (200). It communicates with the third space (S3) through . The passing speed and amount of these air are controlled by the mesh 22 and membrane 28. In addition, the frequency can be tuned by adjusting the total volume of the second space (S2) or the ratio of the narrow space and the wide space (S21, S22). This is convenient and economical in that the sound quality can be improved by tuning the frequency by changing the second space (S2), that is, the tuning structure (2), without changing the first or third space (S1, S3). Air in the third space S3 may be discharged to the outside through the duct hole 40.

Since the second space (S2) communicates with the first space (S1) and at the same time with the third space (S3), the member including the inlet 24 or the member including the outlet 26 is changed to form the first space (S1). ) or the acoustic relationship with the third space (S3) can be tested and tuned independently, which has the advantage of securing extensive and accurate frequency tuning data.

Figure 6 is a frequency-sound pressure graph tested using the speaker module 1 of the present invention and the current level technology of Figure 7. By applying the speaker module 1 of the present invention, the phenomenon of peak occurrence at the double frequency (2f0) can be removed or alleviated, and thus the abnormal vibration phenomenon can be solved. Also, based on this, frequency tuning work that ensures optimal sound quality can be performed by changing the tuning structure (2) and the second space (S2).

Although several embodiments of the present invention have been described above, various changes are possible to the present invention. For example, the sound outlet 20 may be placed in front of the speaker module 1 or in front of the diaphragm.

It is obvious that the scope of rights of the present invention extends to the same or equivalent area as the claims described below.

Claims (8)

As a speaker module, the speaker module is mounted between a first space at the top where the driver is mounted, a third space formed opposite to the first space on the other side of where the driver is mounted, and between the first space and the third space. It includes a second space provided by a tuning structure equipped with at least one ventilation control member at the boundary with the first space or the boundary with the third space, and the second space communicates with the first space and the third space simultaneously. , eliminates the occurrence of abnormal vibrations and enables frequency tuning,
The third space is blocked from the drive mounting space and is located on the opposite side of the drive mounting space.
The speaker module is radial on the side, and part of the first space communicates with the sound discharge outlet, and the second and third spaces do not communicate with the sound discharge outlet and are blocked.
The second space consists of a small space (S21) on the side that communicates with the first space and a large space (S22) on the side that communicates with the third space,
Speaker module. According to clause 1,
The ventilation control member installed at the boundary between the first space and the second space is a mesh, and is installed at the entrance of the second space or a path connecting the first space and the second space. A speaker module. According to clause 1,
The ventilation control member installed at the boundary between the second space and the third space is a mesh or membrane. According to clause 1,
A first path is provided in the first space to communicate with a tuning structure, the first path is a channel extending from the first space, and air in the first space flows into the second space through the first path. module. According to clause 4,
The tuning structure further includes a second path, wherein the second path is an empty channel extending downward from the lower surface of the second space, and the air in the second space flows into the third space through the second path. . According to clause 5,
A speaker module in which a duct hole is formed on the bottom of the third space, and the duct hole communicates with the bottom of the second path. According to clause 1,
A speaker module wherein the third space has the largest volume and the second space has the smallest volume. An electronic device including the speaker module of any one of claims 1 to 7.