KR20180128753A - Slim Enclosure Assembly - Google Patents

Abstract

The present invention relates to a slim enclosure assembly. The slim enclosure assembly, of which the maximum area of a first longitudinal section is more than five times that of the maximum area of a second longitudinal section, includes: a speaker combination part installed on the rear side of the slim enclosure assembly, and combined with a speaker device to have a vibrating surface placed toward the rear side of the assembly; and a cover part combined with the front side of the slim enclosure assembly to cover the upper surface of the speaker device to form an air passage for directing a sound generated from the vibrating surface of the speaker device to an output port formed in the bottom of the assembly. The cover part more includes an outlet formed in a position at a distance from the output port and having an area which is at least 70% smaller than the area of the output port.

Description

[0001] Slim Enclosure Assembly [0002]

The present invention relates to a slim enclosure assembly coupled with an acoustic device, and more particularly to a slim enclosure assembly capable of enhancing treble performance.

Electronics such as TVs, monitors, notebook PCs, tablet PCs and smart phones are becoming increasingly slim to enhance design performance and ease of use. Such an electronic device is equipped with a speaker device for sound reproduction, and the speaker device is also required to be made slimmer as the product becomes slimmer.

Conventional thick-walled CRT TVs have a sufficient space for mounting a speaker device and an enclosure therein, but the space for installing speaker devices and enclosures is gradually decreasing due to the development of flat panel TVs such as LCDs, PDPs, and OLEDs. In addition, in the case of a conventional electronic product, a speaker is exposed toward the front of the display. In recent years, however, it is common that the speaker is located behind the display according to a design trend that minimizes a bezel as a display frame.

There have been various attempts to increase the acoustic performance of the speaker while minimizing the area of the diaphragm of the speaker device or lowering the height of the speaker device in accordance with the slim design trend and bezeless design trend.

Japanese Laid-Open Patent Publication No. 2013-251838, "FOSTER ELECTRIC INSTALLATION STRUCTURE OF SPEAKERS", discloses a speaker installation structure that is installed toward the bottom surface of a TV in a flat type TV. According to this structure, since the narrow speaker is installed toward the lower end of the display bezel, the structure of the speaker system is simplified and the cost of the speaker system is reduced, unlike the circular speaker or the square speaker which has a similar length and length. However, since the narrow diaphragm area is used and the low-frequency expansion through the enclosure is impossible, there is a problem in that the performance of the low-frequency band is deteriorated.

"Speaker module and thin electronic device having the same" of Wistron Corporation, US Patent Publication No. 2015-0195636, and Korean Patent Laid-Open No. 10-2016-0118671, "Slimmed Box with speaker unit" Disclosed is a bottom radial slim enclosure assembly incorporating a narrow speaker. According to this structure, low-frequency expansion can be achieved through the enclosure as compared with a structure in which a narrow speaker is mounted without an enclosure. However, there is still a problem in that the improvement of the low-frequency performance is required because the narrow speaker having a small diaphragm area is used.

WO 2014/082368 " Thin double-cone phase-inverted loudspeaker enclosure " of WUXI JIEFU ELECTROACOUSTIC discloses a rear radial slim enclosure assembly with circular or square loudspeakers. According to this structure, a general speaker having a wide diaphragm area can be used through the rear surface of the enclosure, and low-frequency expansion is possible through the enclosure, thereby improving low-frequency performance. However, since the sound pressure radiated through the back of the TV is reflected through the wall and transmitted to the user on the front side of the TV, the high frequency which is not diffracted is not sufficiently transmitted to the user, there is a problem. In addition, a standing wave is generated in the frequency band of the corresponding wavelength according to the distance between the wall and the back surface of the TV during the TV installation, so that a mid- and low-level dip in which the SPL (sound pressure level) There is a problem.

International Patent Publication No. WO 2014/194446 to WUXI JIEFU ELECTROACOUSTIC, entitled " Horn type multi-point excitation loudspeaker enclosure " discloses a slim enclosure assembly including a rear radial low-pass speaker and a bottom radial high-pass speaker. According to this structure, the wide diaphragm area of the low-frequency speaker and the enclosure improves the low-frequency performance and the high-frequency performance is also improved by the additionally installed narrow-band high-frequency speaker. However, since a large number of speaker units are required, there is a problem that the speaker system cost increases.

Amtran Technology US Patent Publication No. 2014-0146991 entitled " Audio output device and video / audio output device using the same ", Samsung Electronics US Patent Publication No. 2014-0369533 entitled " Electronic device with side acoustic emission type speaker device " And US-A-2014-0301587, entitled " Slim enclosure speaker with side acoustic emission structure ", by EM-TECH, discloses a bottom emission type slim enclosure assembly with a conventional speaker. More specifically, the bottom radial slim enclosure assembly is configured to switch the direction of sound pressure from the back to the bottom through a cover that is added over the vibrational surface of a conventional speaker device. According to this structure, since the general speaker of wide diaphragm area is used and the enclosure is used, the low-frequency performance is improved while the low-frequency, mid-frequency and high frequency are radiated to the bottom. However, since a standing wave occurs at a certain frequency in the middle and high frequencies depending on the distance between the diaphragm and the cover, there is a problem in that a mid-high dip where SPL (Sound Pressure Level)

JP 2013-251838 A US 2015-0195636 A1 KR 10-2016-0118671 A WO 2014-082368 A1 WO 2014-194446 A1 US 2014-0146991 A1 US 2014-0369533 A1 US 2014-0301587 A1

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a low radial slim enclosure assembly which is capable of suppressing standing waves generated in a high and middle range by controlling the pressure between the diaphragm and the cover, And aims to improve the acoustic performance in the mid-highway.

In order to achieve the above object, a slim enclosure assembly according to the present invention in which the maximum area of the first longitudinal section is formed at least five times the maximum area of the second longitudinal section, is provided on the rear surface of the slim enclosure assembly, A speaker coupling unit coupled to the speaker unit such that the vibration plane is disposed rearward; And a cover unit coupled to a front surface of the slim enclosure assembly to cover an upper surface of the slim enclosure assembly so as to form an air path to guide sound generated from a vibration surface of the speaker unit to an output port formed on a bottom surface of the slim enclosure assembly And the cover portion may further include an outlet hole spaced apart from the output port and having an area of at least 70% or less of the area of the output port.

In the slim enclosure assembly according to the embodiment of the present invention, the outlet hole is formed between the two-fifths point from the top in the height direction of the cover portion.

In the slim enclosure assembly according to the embodiment of the present invention, the outlet hole is formed as a slit in the width direction.

In the slim enclosure assembly according to an embodiment of the present invention, the outlet hole may further include a mesh covering the slit.

In the slim enclosure assembly according to the embodiment of the present invention, the outlet holes are formed of a plurality of hole arrays.

In the slim enclosure assembly according to the embodiment of the present invention, the outlet hole may be formed as a slit in a width direction formed between two fifth points from the top in the height direction of the cover portion.

In the slim enclosure assembly according to the embodiment of the present invention, the slim enclosure assembly includes the speaker coupling portion including the coupling groove for coupling the upper portion of the speaker device, and the cover coupling portion engaged with the cover portion A first main body portion; And a second body unit coupled to a lower portion of the speaker unit to define a resonance space.

The slim enclosure assembly according to an embodiment of the present invention is characterized in that an air path for resonating in a low frequency band and a bass port connected to an outside air are formed by the coupling of the first main body and the second main body.

In the slim enclosure assembly according to the embodiment of the present invention, the output port is formed by the engagement of the first body portion and the cover portion.

In the slim enclosure assembly according to the embodiment of the present invention, the second body part may further include an exposure hole through which the bottom surface of the speaker device is exposed.

A slim enclosure assembly according to an embodiment of the present invention is mounted on a rear surface of a display unit.

The image display apparatus according to the present invention is characterized in that it comprises the slim enclosure assembly of claim 1.

The information terminal apparatus according to the present invention is characterized in that it comprises the slim enclosure assembly of claim 1.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a low radial slim enclosure assembly which is capable of suppressing standing waves generated in a high and middle range by controlling the pressure between the diaphragm and the cover, And aims to improve the acoustic performance in the mid-highway.

1 is an exterior view illustrating a slim enclosure assembly according to an embodiment of the present invention;
2 is an exploded view of a part showing a state of parts of a slim enclosure assembly according to an embodiment of the present invention;
3 is a view showing engagement of a slim enclosure assembly and an image display device according to an embodiment of the present invention.
4 is an external view showing the inside of a first main body according to an embodiment of the present invention;
5 is an external view showing the inside of a second main body according to an embodiment of the present invention;
6 is a second longitudinal cross-sectional view of a slim enclosure assembly according to an embodiment of the present invention.
7 is an external view showing the rear radial slim enclosure with the cover removed.
8 is a graph of the frequency response measured at the rear of a conventional rear radial slim enclosure with the cover removed.
Figure 9 is a graph of the frequency response measured at the front of a conventional rear radial slim enclosure with the cover removed.
Fig. 10 is an outline view showing a conventional bottom emission radial slim enclosure that does not include a spout; Fig.
11 is a graph of the frequency response measured at the front side of a conventional bottom emission radial slim enclosure that does not include outflow holes.
12 is a graph of the frequency response measured at the front of a slim enclosure assembly according to an embodiment of the present invention.

It is to be understood that the terms and words used in the present specification and claims are not to be construed in a conventional or dictionary sense and that the inventions of the present invention But also the meaning and the concept corresponding to the technical idea of.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings correspond to the preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, There may be equivalents and variations.

The specification that " comprises " any element in any specification throughout the specification does not exclude other elements, but may include other elements, unless the context clearly dictates otherwise.

3 and 6, the rear surface, the bottom surface, and the like used herein refer to the direction in which the diaphragm of the loudspeaker apparatus 110 is mounted so as to face the rear surface of the display unit, , The slim enclosure assembly 100 may be modified differently while maintaining the same relative directional relationship according to the embodiment of coupling to the image display device 200 or the information terminal device.

As used herein, " slim enclosure assembly " means an enclosure assembly wherein the maximum area of the first longitudinal section is formed at least five times the maximum area of the second longitudinal section. The term " first longitudinal section " used in the present invention means a surface in the same direction as the surface to which the speaker device 110 of FIG. 2 is coupled, and the " second longitudinal section & Perpendicular to the first longitudinal section, and perpendicular to the first longitudinal section.

An enclosure assembly for use in a speaker mounted on an electronic device such as a TV, a monitor, a notebook PC, a tablet PC, a smart phone, etc., and is designed to minimize an increase in the thickness of the electronic device, Lt; RTI ID = 0.0 > 100 < / RTI >

As used herein, the term " general speaker " or " general speaker device " refers to a speaker in which the diaphragm has a planar shape close to a circular or rectangular shape and is coupled to the upper surface of the slim enclosure assembly 100, so that the width of the diaphragm plane affects the thickness of the enclosure assembly And the height of the speaker device 110 affects the thickness of the enclosure assembly.

As used herein, the term " narrow speaker " or " narrow speaker apparatus " refers to a rectangular speaker having a long axis and a short axis or a track-like speaker having a long axis and a short axis, Refers to a speaker in which the height of the device 110 does not affect the enclosure assembly thickness and the width of the longitudinal axis of the diaphragm affects the enclosure assembly thickness.

Although the drawings herein illustrate an embodiment in which one general speaker is mounted on the rear face of the slim enclosure assembly 100 and one tweeter 180 is mounted on the bottom face, the slim enclosure assembly 100 of the present invention is similar to the above- The present invention is not limited to the structure. Depending on the embodiment, only one or a plurality of general speakers may be mounted on the rear surface of the single slim enclosure assembly 100, or a single or a plurality of And a single or a plurality of narrow speakers may be mounted on the bottom surface of the slim enclosure assembly 100 for enhancing the midrange performance.

It is also contemplated that a single slim enclosure assembly 100 may be mounted to a single electronic device or two slim enclosure assemblies 100 may be mounted to a single electronic device such as a left slim enclosure assembly and a right slim enclosure assembly, Three or more slim enclosure assemblies, such as an assembly, a right slim enclosure assembly, and a central low slim slim enclosure assembly, may be mounted in a single electronic device.

Hereinafter, a slim enclosure assembly 100 according to an embodiment of the present invention will be described with reference to the drawings. The enclosure assembly to which the present invention is applied is a slim enclosure assembly 100 in which the maximum area of the first longitudinal cross-section is greater than five times the maximum area of the second longitudinal cross-section. In the embodiment of FIG. 1, the maximum area of the first longitudinal section may be the area of the rear surface where the speaker coupling section 121 is formed, and the maximum area of the second longitudinal section may be the area of the section shown in FIG. 6 1, the maximum area of the first longitudinal cross-section is about 12 times the maximum area of the second longitudinal cross-sectional area.

The slim enclosure assembly 100 according to the present invention includes a speaker coupling part 121 and a cover part 140. 2 and 4, the speaker coupling part 121 is installed on the rear surface of the slim enclosure assembly 100, and the speaker device 110 is coupled such that the vibration surface is disposed toward the rear of the slim enclosure assembly 100 . The speaker device 110 to be coupled to the speaker coupling part 121 is not particularly limited, but it is advantageous in terms of acoustic characteristics to use a general speaker rather than a narrow speaker because the restriction of the diaphragm width is small due to the mounting structure. However, in an embodiment in which a mounting space is extremely limited, such as a smart phone, a micro speaker having a shape having a major axis and a minor axis may be used as the speaker device 110. [

The cover 140 is coupled to the front surface of the slim enclosure assembly 100 to form an air path for guiding the sound generated from the vibration surface of the speaker device 110 to the output port 150 formed on the bottom surface of the slim enclosure assembly 100. [ And covers the upper surface of the speaker device 110. [ The cover 140 may be formed separately from the main body of the slim enclosure assembly 100 as shown in FIG. 2, or may be integrally formed with the main body of the slim enclosure 100 according to an embodiment.

When the cover part 140 is formed of a magnetic material, the magnetized cover part 140 changes the direction of the magnetic field in the magnetic gap of the speaker device 110 to change the direction of the magnetic force induced in the voice coil do. Therefore, the cover 140 is preferably a non-magnetic material such as aluminum, copper, plastic or the like so as not to be magnetized by the speaker magnet.

 When the rigidity of the cover 140 is insufficient, the cover 140 vibrates like a passive radiator according to the vibration pressure of the diaphragm located under the cover 140, thereby distorting the acoustic characteristics. Therefore, it is preferable that the cover portion 140 is formed of a shape or a material having sufficient rigidity.

The cover 140 functions to switch the direction of the sound so that the sound generated from the diaphragm is radiated to the bottom without being radiated to the rear. At this time, depending on the distance between the diaphragm and the cover 140, a standing wave wave. Such a standing wave causes the SPL to drop rapidly in the corresponding frequency band. As the distance between the diaphragm and the cover 140 becomes shorter, dips occur in the higher frequency band where the wavelength is shorter.

In order to prevent the generation of the standing wave, the cover unit 140 further includes an outflow hole 160 for pressure balance with the outside air. It is preferable that the outlet hole 160 is formed to have an area of at least 70% of the area of the output port 150 at a position spaced apart from the output port 150. In the mounting example shown in FIG. 6, May be formed as a slit in the width direction formed between the point 2/5 of the uppermost portion in the height direction of the cover portion 140.

The shape of the outflow hole 160 is not particularly limited, and the outflow hole 160 may be formed as a slit in the width direction as shown in FIG. The outlet hole 160 may further include a mesh or nonwoven fabric covering the slit so that the outlet hole 160 does not function as an acoustic output port. According to another embodiment, the outflow hole 160 may be formed as a single hole or a plurality of hole arrays.

As the area of the outflow hole 160 is larger, it is helpful to reduce the dip. However, if the area is excessively large, the sound emitted from the backside increases, so that the problem that the overall high- Occurs. Thus, it has been experimentally confirmed that when the area of the outlet hole 160 is 70% or less of the area of the output port 150, the reduction of the overall high-frequency sound is minimized and effective for removing the dip. In the embodiment of FIG. 1, the area of the outflow hole 160 is 60% of the area of the output port 150.

It has been confirmed that the position of the outflow hole 160 contributes to the removal of the dope as the distance from the output port 150 increases. Since the edge of the cover portion 140 adjacent to the output port 150 is not fixed to the enclosure assembly, when the outflow hole 160 comes close to the output port 150, the vibration of the diaphragm due to the lowering of the rigidity of the cover portion 140 occurs Thereby distorting the acoustic characteristics. 6, it is preferable that the outlet hole 160 is formed between the uppermost two-fifths of the cover portion 140 in the height direction, and the height of the cover portion 140 It is more preferable to form the outlet hole 160 so as to be close to the uppermost end.

Meanwhile, the slim enclosure assembly 100 may include the first body portion 120 shown in FIG. 4 and the second body portion 130 shown in FIG. The first body part 120 includes a speaker coupling part 121 including a coupling groove for coupling an upper part of the speaker device 110 and a cover coupling part 122 coupling with the cover part 140 . At this time, the output port 150 may be formed by coupling the first body part 120 and the cover part 140 as shown in FIGS. 1 and 6.

The second body part 130 includes a second body part 130 coupled to a lower portion of the speaker device 110 to define a resonance space. The second body part 130 may further include an exposure hole 131 through which the bottom surface of the speaker device 110 is exposed. The exposure hole 131 formed in the second body portion 130 can reduce the height of the slim enclosure assembly 100 and increase the heat radiation effect due to the exposed magnetic circuit by exposing the magnetic circuit of the speaker device 110 have.

5 and 6, the slim enclosure assembly 100 is connected to the air path for resonance in the low frequency band and the outside air by the coupling of the first body part 120 and the second body part 130, The low-frequency port 170 is preferably a low-frequency extension through Helmholtz resonance.

The slim enclosure 100 according to the present invention is preferably mounted on the rear surface of the display unit as shown in FIG. 3, and the slim enclosure 100 according to the present invention can be mounted on an image display device 200, or may be used in information terminal devices such as a notebook PC, a tablet PC, a smart phone, a camera, and a car navigation system.

Hereinafter, the acoustic characteristics of the slim enclosure assembly 100 according to the present invention will be described with reference to FIGS. 7 to 12 in comparison with a conventional slim enclosure assembly. A slim enclosure assembly of the same shape as the same speaker device 110 was used for comparison. 7, the cover 140 is removed to measure the acoustic characteristics of the conventional backside radial slim enclosure assembly 300, and then the outflow hole 160, as shown in FIG. 10, And then finally measuring the acoustic properties of the conventional bottom radial slim enclosure assembly 400 using the cover portion without the cover portion 140 having the outlet hole 160 according to the embodiment of the present invention as shown in FIG. The acoustic properties of the bottom radial slim enclosure assembly 100 were measured.

The frequency response graph of FIG. 8 is measured in the backward direction of the rear radial slim enclosure assembly 300 of FIG. This is a reference graph showing the basic acoustic characteristics of the speaker device 110 and the slim enclosure assembly 300. Since the slim enclosure assembly 300 is mounted on the rear side of the TV, the actual user can not hear the sound from the rear side of the slim enclosure assembly 300, and is heard on the front surface covered with the display portion. Therefore, the frequency response graph of FIG. 8 is an ideal reference graph that does not consider the actual use environment.

The frequency response graph of FIG. 9 is measured in the frontal direction of the rear radial slim enclosure assembly 300 of FIG. Compared with FIG. 8, the low frequency band has similar characteristics, but it is confirmed that SPL is generally lower than 500 Hz above the used frequency band. This is interpreted as a result of the fact that the strong vibration of the used stationary vibration is not diffused from the rear direction to the front direction.

The frequency response graph of FIG. 11 is measured in the frontal direction of the conventional bottom emission radial slim enclosure assembly 400 of FIG. Compared with FIG. 8, the reduction of the SPL of the high frequency band is reduced, but the overall flatness of the graph is lowered compared to FIG. 8 and FIG. 9, and a deep dip is observed at around 2 kHz at 3 kHz. This is due to a standing wave at a specific frequency that occurs according to the distance between the loudspeaker diaphragm and the cover.

The frequency graph of FIG. 12 is measured in the frontal direction of the bottom radial slim enclosure assembly 100 according to the embodiment of the invention of FIG. Compared with FIG. 9, the reduction of the SPL of the high frequency band is reduced, and it is confirmed that the high and middle dip occurred in FIG. 11 does not occur. This is due to the reduction of the standing wave due to the outflow hole 160 formed in the cover part 140. Accordingly, the cover portion 140 including the outlet hole 160 according to the present invention provides an effect of drastically improving the usability of the slim enclosure assembly 100.

The detailed description of the invention in this specification is intended to illustrate the preferred embodiments, and the invention is not limited to these embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. .

100: Slim enclosure assembly 110: Speaker device
120: first main body 121: speaker coupling part
122: cover coupling part 130: second main body part
131: Exposure hole 140: Cover part
150: output port 160: outflow hole
170: Bass port 180: Twitter
200: image display device

Claims (12)

Wherein a maximum area of the first longitudinal cross-section is formed at least five times the maximum area of the second longitudinal cross-section,
A speaker coupling unit installed on a rear surface of the slim enclosure assembly and coupled to the speaker unit such that a vibration surface is disposed toward the rear of the slim enclosure assembly; And
And a cover unit coupled to a front surface of the slim enclosure assembly to cover an upper surface of the slim enclosure assembly so as to form an air path to guide sound generated from a vibration surface of the speaker unit to an output port formed on a bottom surface of the slim enclosure assembly Respectively,
Wherein the cover portion further comprises an outlet hole spaced apart from the output port and having an area of at least 70% less than the area of the output port. The method according to claim 1,
And the outflow hole is formed between the point 2/5 of the uppermost portion in the height direction of the cover portion. 3. The method of claim 2,
And the outlet hole is formed as a slit in the width direction. The method of claim 3,
Wherein the outlet hole further comprises a mesh covering the slit. ≪ Desc / Clms Page number 13 > 3. The method of claim 2,
Wherein the outlet hole is formed of a plurality of hole arrays. The method according to claim 1,
The slim enclosure assembly includes a first main body portion including the speaker coupling portion including the coupling groove for coupling the upper portion of the speaker device and the cover coupling portion engaging with the cover portion; And a second body coupled to a lower portion of the speaker device to define a resonance space. ≪ Desc / Clms Page number 19 > The method according to claim 6,
Wherein the slim enclosure assembly forms an air path for resonance in the low frequency band and a bass port connected to the outside air by the engagement of the first body part and the second body part. The method according to claim 6,
Wherein the output port is formed by engagement of the first body portion and the cover portion. The method according to claim 6,
Wherein the second body part further comprises an exposure hole through which the bottom surface of the speaker device is exposed to the front side. The method according to claim 1,
Wherein the slim enclosure assembly is mounted to a rear surface of the display portion. An image display device comprising the slim enclosure assembly of claim 1. An information terminal apparatus comprising the slim enclosure assembly of claim 1.

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