KR19990081624A - 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. In addition, 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 so as to contact the ground, thereby preventing vibration of the television set by changing the natural vibration frequency of the front mask. will be.

Description

Vibration prevention device of TV set by speaker sound source

The present invention provides a television set by a speaker sound which can effectively prevent the occurrence of vibration and the interference caused by a natural frequency of a television set by a sound source generated from a speaker of a television set and a mode. In particular, the anti-vibration device of the present invention, in particular, the thickness of the lower front surface of the front mask to which the speaker of the TV is thickened to a certain thickness, to reinforce the rib of the bottom of the front mask to a certain thickness, and the substrate of the front mask is By installing a support part in contact with the ground at the bottom of the rail 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 structure and the interference of the components, and accordingly, TV set by speaker sound to improve sound quality further It relates to a copper preventing device.

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. 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 168Hz and the resonance frequency of the structure is 216Hz, and at 216Hz, a sound vibration is generated on the television set of the structure, that is, the front mask to which the speaker is fastened. Relatively high vibration on the floor and the bottom surface, and the vibration caused by the vibration of the button 6 caused by the vibration, the noise generated by the interference, and the noise generated by the interference from the vibration of both rails to which the substrate is coupled Will be.

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 lower front surface of the front mask is made thick, the rib of the front mask is reinforced to a certain thickness, and a support part in contact with the ground is installed on the bottom of the rail on which the substrate of the front mask is mounted, thereby providing the rigidity of the front mask. The present invention provides an anti-vibration device for a television set with speaker sound which is increased, thereby significantly reducing vibration and noise generated by the noise generated by the structure and the interference of components, and thus further improving the sound quality of the television. have.

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 bottom structure diagram showing the installation structure of the reinforcing portion is installed on the bottom of the front mask of the present invention in contact with the ground.

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.

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 A ... Button part

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 face of a television with a certain thickness, and the thickness of the ribs protruding the bottom of the front mask is a constant thickness. Tightly reinforced reinforcing ribs are formed in the shape of a cross, and a reinforcing part contacting the ground is provided below the rail on which the substrates on both sides of the lower part of the front mask are mounted to prevent vibration of the TV set by the speaker sound source which reduces vibration. It is characterized by the provision of a device.

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 thicker, the front stiffness of the front end of the front mask The thickness for the reinforcement is also made thicker by t x 0.2-0.5 mm, which suppresses sound vibrations on the front surface to which the speaker is attached, and the thickness of the ribs protruding at the bottom of the front mask is rib thickness X 0.1-0.3 mm. Thicker reinforcement ribs are formed to cross each other in a cross shape to suppress sound vibrations in the Y-axis vibration mode of the bottom surface, and interference and noise generated from the rails on which the substrates on both lower sides of the front mask are mounted. In order to suppress vibration, a reinforcing part is provided under the two rails in contact with the ground, and the support bracket, which is the reinforcing part, has a central portion thereof at the upper side thereof. While passing through the rails, the rails are positioned to the rear half or more 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 and prevents the vibration of the television set by changing the natural vibration frequency of the front mask. It is characterized by preventing.

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 where reinforcing ribs and a reinforcing part formed in a bottom of a television front mask according to the present invention are installed, and FIG. 5 is a reinforcing part installed in the front mask bottom of the present invention and in contact with the ground. A bottom structure diagram showing a negative installation structure, in which the bottom 11 of the front mask 10 and the front end 12 of the front mask 10 are suppressed in order to suppress a resonance phenomenon caused by sound pressure of a speaker installed in the front mask 10 of a television. The thickness t for the rigidity reinforcement of the front side) is made thicker than the front mask front thickness X 0.2-0.5 mm, and the thickness of the ribs protruding horizontally and vertically to the bottom 11 of the front mask 10 is determined. To cross rib reinforcement ribs 13 reinforced with a rib thickness X 0.1-0.2 mm thicker in a cross shape, and to the lower side of the rail 14 on which the substrates on both lower sides of the front mask 10 are mounted. If to install the reinforcing portion 15 having a predetermined shape that contacts the (P).

The reinforcement part 15 installed below both side rails 14 of the front mask 10 is composed of a square 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 reinforcement portion 15, is installed so that the rail 14 passes through the upper side thereof, and the rail 14 and the substrate are installed at the bottom of the front mask 10 by sound pressure. It is made of a configuration that suppresses.

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 according 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, the natural vibration frequency is changed to suppress sound vibration. In order to achieve this, the thickness t of the bottom surface 11 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.

At the same time, the thickness t for reinforcing the rigidity of the front surface 12, which is the front end thereof, is also formed to be thicker than the front mask front thickness X 0.2-0.5 mm, 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, that is, the front and bottom surfaces of the front mask 10 is caused by a large vibration. When the thickness is set to a thickness less than 0.2 mm, the resonance frequency due to sound pressure is 192 Hz and In the area of 212Hz, which is the resonant frequency of the structure (front mask), the sound vibration is still severely generated, and at the base thickness X 0.5mm or more, the structure of the television is excessive in order to widen the structure resonant frequency. It is not possible to increase the thickness of the bottom surface, so as to form a thick rib (Rib) thickness of the bottom surface.

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

The rib thickness of the front mask 10 is formed in the present embodiment is 3.0 mm, the thickness of the increased rib is formed 3.0 x 0.1-0.2 mm thick, preferably about 3.5 mm, so that the sound vibration of the bottom surface In this case, the reinforcing rib 13 is not connected to the front mask 12 while maintaining a distance of 1 to 5 mm.

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 15, allows the entire area of the support bracket 16 to be positioned below the rail 14 by 4/1 or more. In the embodiment of the present invention, it is most preferable to allow the central portion K of the support bracket 16 to pass through the center of the rail 14 located above.

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 at more than half of the entire length, the rail cannot properly suppress the interference while supporting the front end that causes the most severe vibration.

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 rear end is located in the relationship with the back cover is located in the structure Is complicated and positioned between the middle of the rail length at the rear end of the rail 16.

As described above, the support bracket 16 is provided below the bottom 11 and the front 12, the reinforcing rib 13, and the rail 14 of the front mask 10, and the sound pressure of the front mask 10 is reduced. The experiment with the speaker was conducted by reinforcing the part where a lot of vibration occurred.

This is shown in the graph of Figure 6 the result of measuring the sound pressure while changing the frequency and put the sound level meter at 30Cm in front of the modified TV set.

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 reduced as indicated by the dotted line at the resonance frequency of the front mask represented by the solid line.

Therefore, while increasing the thickness of the bottom surface 11 and the front surface 12, which are most likely to vibrate, the front mask 10, which is a structure by the speaker sound source, the reinforcing ribs 13 are installed crosswise to the front mask 10. And the support brackets 16 are installed below the rails 14 so as to be in contact with the ground, the vibration of the front mask can be significantly reduced.

As described above, according to the vibration preventing device of the television set by the speaker sound according to the present invention, the front of the speaker of the television is installed so that the vibration can be suppressed by changing the natural frequency and mode of the front mask sound source frequency band by the speaker sound source The thickness of the lower front surface of the mask is made thick, the ribs of the front mask bottom are reinforced to a certain thickness, and the support portion which is in contact with the ground is installed on the bottom of the rail on which the substrate of the front mask is mounted, thereby increasing the rigidity of the front mask. Accordingly, the vibration and noise generated by the noise generated from the structure and 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 (5)

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, Reinforcing ribs 13 are formed in a cross shape in the bottom portion 11 of the front mask 10, and the bottom surface 11 of the front mask 10 is in contact with the ground under the substrate mounting rails 14 on both sides of the lower portion of the front mask 10. Vibration preventing device of the television set by the speaker sound source, characterized in that to provide a reinforcing portion (15) to reduce the vibration. According to claim 1, wherein the reinforcing ribs 13 formed in the cross-shaped shape on the bottom portion 11 of the front mask 10, characterized in that the front mask 12 is installed 1-5mm apart from the front mask Vibration prevention device of TV set by speaker sound source. The method of claim 1, wherein the reinforcing portion 15 is provided below the both sides of the rail 14 of the front mask 10, characterized in that consisting of a support bracket 16 of a rectangular shape in contact with the ground (P). Vibration prevention device of TV set by speaker sound source. The support bracket 16 according to claim 1 or 3, which is a reinforcement part 15 provided below the both rails 14, is installed such that its center portion K passes through the rails 14 upwardly. Vibration preventing device of the TV set by the speaker sound source characterized in that. The support bracket 16 according to claim 1 or 3, which is a reinforcement part 15 provided below the both side rails 14, has an overall length of the rail 14 provided above the support bracket 16. Vibration preventing device of the TV set by the speaker sound source, characterized in that located more than half rear.