KR19990081626A - Vibration prevention device of TV set by speaker sound source - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television set vibration preventing device that can effectively prevent the generation of vibration of a television set by a sound source generated from a speaker of a television. In the state in which the thickness of 12) is formed to be thick (t), the reinforcing ribs 13 having the thickness of the ribs protruding from the bottom 11 of the front mask 10 to a certain thickness are formed in a cross shape. Further, a reinforcing portion 15 is provided below the rail 14 on which the substrates on both lower sides of the front mask 10 are mounted and in contact with the ground, and a reinforcing support portion is provided below the both rails 14 on which the substrate is mounted. 18) to prevent the vibration of the X- and Y-axis of the television set by changing the natural vibration frequency of the front mask.

Description

Vibration prevention device of TV set by speaker sound source

The present invention provides a television set based on a speaker sound which effectively prevents the occurrence of vibration caused by a natural frequency of a television set and a mode caused by a sound source generated from a speaker of a television set, and the resulting interference. In particular, the anti-vibration device of the present invention, which is formed, the thickness of the bottom portion of the front mask to which the speaker of the TV is set to have a certain thickness, to reinforce the ribs of the bottom of the front mask to a certain thickness, By installing reinforcing supports under both rails to be installed, the rigidity of the front mask is increased, thereby significantly reducing the vibration and noise generated by the noise generated by the front mask, which is a television set structure, and the interference of components. Accordingly, the speaker sound which can improve the sound quality of TV further An apparatus for preventing vibration of a television set by

In general, a speaker of a television set includes a moving coil for converting an electrical signal into a linear motion and a diaphragm for generating sound pressure by connecting the linear motion with a tremor. It has a structure that is interconnected.

Fig. 1 is a view showing the installation structure of a speaker mounted on a set of televisions, in which a speaker grill 2 is provided in the front mask 1 of the television, and a speaker frame 3 is provided behind the speaker grill 2. It is made of a structure in which the speaker 5 on which the diaphragm 4 is installed is installed.

In this case, a plurality of buttons 6 are installed in the front mask 1 in which the speaker grill 2 is installed.

The speaker frame 3 supports the permanent magnet and causes resonance when the moving coil and the diaphragm 4 vibrate. For example, when a sound of 100 Hz is generated from the speaker, a corresponding reaction is generated by the speaker frame 3. As well as being transmitted to the front mask 1 of the television set, etc., the speaker diaphragm 4 generates sound pressure forward and at the same time rearward, thereby spreading the sound pressure with the surrounding structure. .

Thus, the vibration generated by the speaker 5 is transmitted to each part by the body of the television set, and the sound generated through the diaphragm is mostly radiated to the outside, but a part of the structure around the speaker as indicated by the arrow of FIG. For example, it is transmitted to a rail on which a substrate is mounted, and the vibration transmitted as described above generates noise due to contact between each component.

In particular, the television set is structurally composed of a combination of the front mask and the back cover, wherein the portion of the front mask (1) which is most affected by the vibration of the speaker sound pressure becomes the main vibration generating region, wherein the audible frequency of the television set is Since is usually a low frequency region of less than 1600Hz, in most cases the front mask itself is a vibration is generated.

On the other hand, the noise and vibration of the front mask by the speaker sound source as described above is caused by the resonance phenomenon, such a resonance is a dynamic force is generated by the natural frequency or vibration mode of the structure around the front mask speaker.

2 (A) and (B) are graphs of measurement of acceleration and displacement at the fastening point of the speaker fastened to the front mask, showing that the frequency of the speaker is the resonant frequency most severely resonant at 168 Hz. 3 is a graph of a sound pressure curve measured outside of a television set, where a large sound pressure is generated at 216 Hz, which is not a sound pressure caused by a speaker, but directly due to the vibration of the television set. It can be seen that.

That is, it is confirmed that the resonance frequency of the speaker is 168 Hz and that the structure of the television set, in particular, the front mask is 216 Hz, and at 216 Hz, sound vibration occurs in the structure of the television set, that is, the front mask to which the speaker is fastened. Vibration shows a relatively large vibration in the front and bottom surface of the front mask, the vibration caused by the vibration of the button 6 caused by the vibration, such as the noise generated by the interference, and also due to the vibration of the rail portion of both sides that the substrate is coupled Interference causes noise to be relatively high.

SUMMARY OF THE INVENTION The present invention has been made to solve various problems of the related art as described above, and an object thereof is that a speaker of a television is installed to suppress vibration by changing a natural frequency and a mode of a front mask sound source frequency band by a speaker sound source. The thickness of the bottom portion of the front mask is formed to a certain thickness, the ribs of the front mask bottom portion are reinforced to a certain thickness, and in particular, a reinforcement support portion is provided below both rails on which the substrate of the front mask is mounted, thereby providing a front mask. The stiffness is increased, thereby significantly reducing the vibration and noise generated by the noise generated by the front mask, which is a set structure, and the interference of components such as rails, and thus improving the sound quality of the TV. To prevent vibration of TV sets There in the ball.

1 is a diagram showing an installation structure of a speaker mounted on a set of a general television.

Fig. 2A is a graph of measurement of acceleration at the fastening point of the speaker fastened to the television front mask.

(B) is a graph of measurement of displacement at a fastening point of a speaker fastened to a television front mask.

3 is a graph of measurement of a sound pressure curve measured outside of a television set.

Fig. 4 is a bottom structure diagram showing a state where reinforcing ribs and reinforcing portions formed in a bottom portion of a television front mask according to the present invention are provided;

Figure 5 is a main structure diagram showing the reinforcement support of the rail is installed on both sides of the front mask lower side of the present invention is mounted.

Figure 6 is a graph of the sound pressure measurement results measured outside the television set by changing the front mask structure of the present invention.

7 (A) (B) (C) are graphs of acceleration tests measured in the X-axis, Y-axis, and Z-axis directions of the left rail by reinforcement of the rail provided in the front mask of the present invention.

8 (A) (B) (C) are graphs of acceleration tests measured in the X-axis, Y-axis, and Z-axis directions of the right rail by reinforcement of the rail provided in the front mask of the present invention.

Explanation of symbols on the main parts of the drawings

10 ... front mask 11 ... bottom

12 ... Front 13 ... Reinforcement rib

14 ... rail 15 ... reinforcement part

16.Support bracket 17.Rib

18 Reinforcement support P ... ground

K ... support bracket center

As a technical configuration for achieving the above object, the present invention provides a thickness of the front mask bottom and the front surface of a television with a constant thickness, and a thickness of the rib protruding from the bottom of the front mask with a predetermined thickness. Reinforcing ribs are formed, and reinforcing parts are provided under the rails on which the substrates on both lower sides of the front mask are mounted, and the reinforcing parts are provided on the lower sides of the rails on which the substrates are mounted. It is characterized by providing a vibration preventing device for a television set by a speaker sound source.

In addition, the present invention increases the bottom stiffness of the front mask by forming a thickness of the bottom bottom surface of the front mask to which the speaker is attached to a thickness of t x 0.2-0.5 mm to increase the bottom stiffness of the front mask, the front end of the front mask is reinforced Also, the thickness for the t x 0.2-0.5 mm is made thick, which suppresses the acoustic vibration of the front surface to which the speaker is attached, and also reinforces the thickness of the rib that protrudes at the bottom of the front mask to the thickness of the rib thickness X 0.1-0.2 mm. A reinforcing rib is formed to cross each other in a cross shape to suppress sound vibration in the Y-axis vibration mode of the bottom surface, and to prevent interference, noise, and vibration generated from the rails on which the substrates on both sides of the lower part of the front mask are mounted. In order to suppress, the reinforcement part which contact | abuts with the ground is provided in the lower side of both rails, The support bracket which is the said reinforcement part has the center part pass the upper side to the upper side. The rear panel is positioned at least half of the entire length of the rail, and the sound pressure suppresses the interference between the rail and the substrate provided at the bottom of the front mask, thereby preventing the television set from vibrating by changing the natural vibration frequency of the front mask. Is characteristic.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 is a bottom structural diagram showing a state in which reinforcing ribs and reinforcing parts formed in a bottom part of a television front mask according to the present invention are installed, and FIG. 5 is installed on both sides of the lower part of the front mask of the present invention to mount a substrate. The main structural diagram showing the reinforcing support of the rail, in order to suppress the X-axis and Y-axis resonance phenomena of the bottom of the front mask 10 and the rail of the front mask 10 according to the sound pressure of the speaker provided in the front mask 10 of the television. The thickness t for rigidly reinforcing the bottom 11 of the mask 10 and the front face 12, which is the front end thereof, is made thick to form the front mask front thickness and the bottom thickness X 0.2-0.5 mm.

In addition, the ribs protruding horizontally and vertically in the bottom portion 11 of the front mask 10 alternately form the reinforcing ribs 13 reinforced with a thickness of rib thickness X 0.1-0.2 mm in a crisscross shape. In addition, a reinforcing portion 15 having a predetermined shape in contact with the ground P is provided below the rail 14 on which the substrates on both lower sides of the front mask 10 are mounted to suppress the Y-axis vibration.

The reinforcement part 15 installed below both rails 14 of the front mask 10 is formed of a rectangular support bracket 16 so as to have excellent contact between the ground P and the front mask. The central portion K of the support bracket 16, which is the portion 15, is installed so that the rail 14 passes upward.

In addition, the X-axis of the rail 14 provided in the front mask 10 by a negative pressure is provided at the lower side of both rails 14, on which the substrate is mounted, with a reinforcing support portion 18 in which the ribs 17 extend in the rail direction. It is made of a configuration that reduces vibration.

An embodiment of the present invention having such a configuration will be described.

Example

Since the vibration of the front mask 10, which is a structure corresponding to the sound pressure of the speaker installed in the front mask 10 of the television, is mainly excited at the front and bottom surfaces of the front mask, the front mask is inherently unique. In order to suppress the sound vibration by changing the vibration frequency, the thickness t of the bottom surface of the bottom 11 of the front mask 10 to which the speaker is attached is formed thick.

The bottom surface thickness of the front mask 10 is 2.7 mm in this embodiment, wherein the increased thickness t of the bottom surface is 2.7 X 0.2-0.5 mm, preferably about 3.2 mm, to form a thick front surface. In addition to increasing the rigidity of the bottom portion 11 of the mask 10, the vibration of the bottom surface is suppressed.

In addition, the thickness t for stiffness reinforcement of the front surface 12, which is lower than the front end portion, is also formed so that the front mask front thickness X 0.2-0.5 mm thick, so that the front 12 portion of the front mask 10 is rigid as described above. In addition, while suppressing the sound vibration of the front to which the speaker is attached.

This indicates that the displacement is 0.02955mm at 168Hz and the displacement is 0.00589mm at 216Hz due to the acceleration and displacement at the speaker fastening position measured in the experiment of FIG. 2, and the value of the result is a harmonic excitation condition. As a result of the analysis, the vibration of the TV set, i.e., the front and bottom surfaces of the front mask 10 is caused by large vibrations. Sound vibration still occurs badly in the region of 212Hz, which is the resonant frequency of the structure (front mask), and the basic thickness of the bottom 11 and the front 12 of the front mask 10 X 0.5 mm or more. In order to increase the resonant frequency of the structure greatly in the structure of the television it is not possible to increase the thickness of the bottom surface, bar A rib (Rib) thickness provided in the surface (底部) is to form thick.

In the state in which the bottom surface thickness of the front mask 10 is made thick as described above, the thickness of the ribs protruding in the horizontal and vertical directions on the bottom portion 11 of the front mask 10 is formed to a predetermined thickness. In this case, the thickness of the reinforced ribs are mutually staggered to form a cross reinforcing rib 13, which is thickly reinforced rib thickness X 0.1-0.2 mm.

In particular, the rib thickness of the front mask 10 is formed in the present embodiment is 3.0 mm, the thickness of the rib is increased to 3.0 x 0.1-0.2 mm, preferably about 3.5 mm thick, so that the bottom of the It is possible to suppress the sound vibration, wherein the reinforcing rib 13, so as not to be connected to the front mask 12 while maintaining a constant distance.

As a reason, the Y-axis vibration mode of the bottom of the front mask 10 is transmitted to the button portion A via the front surface 12 through the reinforcing rib 13, and mutually interferes with the button and the hole installed for installing the button. This is due to a phenomenon that causes noise and vibration, in the embodiment of the present invention, the spacing between the front surface 12 and the reinforcing rib 13 of the front mask 10 is preferably about 3mm.

Subsequently, the rails 14 on which the substrates on both lower sides of the front mask 10 are mounted also support the substrate and the substrate in the region of the resonance frequency 192 Hz due to sound pressure and the resonance frequency of the front mask 10 at 212 Hz. In order to suppress the interference generated by the two rails to be rolled out, and thus noise and vibration, the reinforcing part 15 having a predetermined shape in contact with the ground P is provided below the both rails.

The reinforcement part 15 installed below both side rails 14 of the front mask 10 not only provides excellent contact between the ground P and the front mask 10, but also particularly the rails 14 themselves. In the embodiment of the present invention so as to support the role to be configured as a rectangular support bracket 16, as shown in Figure 5, the shape of the support bracket 16 in a circular or rhombic and triangular shape It may be formed.

In particular, the support bracket 16, which is the reinforcement 15, is installed so that the rail 14 passes through the central portion K of the reinforcement portion 15, and the rail 14 is installed at the bottom of the front mask 10 by sound pressure. ) And the substrate, and the position of the support bracket 16, which is the reinforcement part 15, is such that in the embodiment of the present invention, the central portion K of the support bracket 16 is located above the upper side thereof. It is most desirable to be able to pass through the center of the rail 14 being positioned.

In addition, the support bracket 16 of the rectangular shape should be located at the rear of at least half of the entire length of the rail 14 installed on the upper side of the support bracket 16, while sufficiently supporting the rail 14, it is possible to suppress the generation of vibration and noise due to interference. This is because if the support bracket 16 is positioned in front of more than half of the entire length, the rail cannot properly support the rear end causing the most vibration and thus suppress the interference phenomenon.

Therefore, the most preferable position of the support bracket 16 is located directly below the rear end of the rail 14, but in the design of the front mask, the assembly structure with the back cover is complicatedly installed at the rear end. In relation to this, it is positioned between the middle of the rail length at the rear end of the rail 16.

As described above, both side rails on which the substrate of the front mask 10 is mounted, while reinforcing the bottom 11 and the front surface 12 of the front mask 10 and suppressing vibration according to the Y-axis vibration mode of the front mask 10. The reinforcing support 18 is integrally installed below the 14, and the rib 17 is extended in the rail direction in the reinforcing support 18 to suppress vibration in the X-axis direction due to sound pressure of the speaker. .

The reinforcement support part 18 installed below the both side rails 14 is formed to have a thickness of about 0.3 mm to about 0.5 mm thick of the rail 14, and in the embodiment of the present invention, the base thickness of the rail 14 is thick. Phosphorus 1mm X 0.3-0.5mm, preferably set to about 1.3mm, at this time, below the reinforcement thickness, the sound vibration of the rail side still occurs badly, and the reinforcement thickness or more is due to the design of the mold according to the TV design Deformation of the rail is caused, or difficulty in installing the rib (17) occurs.

In addition, the rib 17 extending in the horizontal direction to the reinforcing support 18 is preferably formed as close to the rail 14 side as possible, but in view of the length (L) of the reinforcing support 18 in view of the production of the mold. Therefore, it is preferable that the rib 17 is located above the center.

As described above, after the support bracket 16 is installed below the bottom 11, the reinforcing rib 13, and the rail 14 of the front mask 10, the support reinforcement 18 is installed on the rail 14. Then, the speaker excitation test was conducted by reinforcing the portions where the X-axis and Y-axis vibrations were largely generated by the sound pressure of the front mask 10.

The test method represents the sound pressure measured in front of the TV set 30 Cm in front of the reinforced television set as in the above example by the speaker excitation test, and the result of measuring the sound pressure while changing the frequency is shown in the graph of FIG. 6.

As a result of measuring the sound pressure level according to the frequency conversion of FIG. 6, it can be seen that the peak of the sound pressure is significantly reduced as indicated by the dotted line at the resonance frequency of the front mask represented by the solid line.

7 and 8 are graphs of acceleration tests measured in the X-axis, Y-axis, and Z-axis directions of the left and right rails by reinforcement of the rails installed in the front mask of the present invention. The acceleration signals measured from the left and right sides of the reinforced rails 14 are shown, and the reinforcement support 18 and the ribs 17 are provided on the rails 14 except in the Z-axis direction (front and rear of the TV). It can be seen that the left and right rails have less vibration, and on the basis of this result, the vibration by the speaker sound source in the television set, especially the front mask 10, is remarkably reduced by the reinforcement of the rail portion.

As described above, according to the apparatus for preventing vibration of a television set by speaker sound, a front mask provided with a speaker of a television so as to suppress vibration by changing the natural frequency and mode of the front mask sound source frequency band by the speaker sound source. The thickness of the bottom of the substrate is formed to a certain thickness, and the ribs of the front mask are reinforced to a certain thickness, and in particular, a reinforcement support is provided below both rails on which the substrate of the front mask is mounted, thereby increasing the rigidity of the front mask. Accordingly, the noise generated from the front mask, which is a set structure, and the vibration and noise generated by the interference of the components are significantly reduced, and accordingly, there is an excellent effect of further improving the sound quality of the television.

Claims (2)

In the television that the speaker grill is installed to one side of the front mask of the television, the speaker installed on the rear of the speaker grill through the speaker frame, the diaphragm is installed, The thickness t of the bottom portion 11 and the front surface 12 of the television front mask 10 is made thick by t x 0.2-0.5 mm, and the thickness of the ribs protruding from the bottom portion 11 of the front mask 10 is determined. Rib thickness X 0.1-0.2 mm A reinforcing rib 13 having a thick reinforcement is formed in a cross shape, and a reinforcing part contacting the ground under the rail 14 on which the substrates on both lower sides of the front mask 10 are mounted. 15), and the reinforcing support part 18 is installed under both of the rails 14 on which the substrate is mounted so that the ribs 17 are extended in the rail direction so as to suppress the vibration in the X-axis direction due to the sound pressure of the speaker. Vibration preventing device of the TV set by the speaker sound source, characterized in that to reduce the vibration. 2. The TV set according to claim 1, wherein the reinforcing support portion 18 provided below the two rails 14 is formed to have a thickness of about 0.3 to 0.5 mm thick. Anti-vibration device.