KR100813734B1 - Howling prevention structure of image display equipment - Google Patents

Abstract

The present invention relates to a howling prevention structure of an image display device, and includes a cabinet, a CRT installed in the cabinet, a speaker installed in the cabinet so that sound is output in accordance with an image implemented in the CRT, and the original weight of the speaker. By the anti-howling structure of the video display device including the weight, the vibration generated during the sound output from the speaker is reduced by the weight added to the speaker's own weight, so that the vibration generated from the speaker is in the cabinet of the video display device. By preventing the movement to the CRT source through the howling phenomenon.

CRT, speaker, howling, weight increase

Description

Structure prevention of howling for display set}

1 is an exploded perspective view of a video display device showing a state in which a speaker mounting bracket is used to prevent howling in the related art.

FIG. 2 is an exploded perspective view of an image display apparatus according to another exemplary embodiment, in which a speaker mounting enclosure is used to prevent howling.

3 is a perspective view of a video display device showing a state in which a howling prevention structure of the video display device according to the present invention is applied.

4 is a perspective view illustrating a speaker of an image display device according to the present invention.

5 is a cross-sectional view showing a state in which the weight for preventing howling is installed in the speaker of the present invention.

Explanation of symbols on main parts of drawing

10: cabinet 20: CRT

100: speaker 110: outer frame

120: York 130: magnet

140: diaphragm 150: bobbin

160: voice coil 170: damper

180: edge portion 190: dust cap

200: weight

The present invention relates to a howling prevention structure of a video display device, and more particularly, to increase the self-weight of a speaker in order to prevent a screen from being shaken by vibration generated during sound output from a speaker installed in the video display device. A speaker is provided with a weight ring that can easily increase the weight of the speaker.

In general, a video display device such as a television is provided with a cathode ray tube for realizing an image, and a speaker for outputting sound in accordance with the image implemented in the cathode ray tube, and the cathode ray tube and the speaker are installed in a cabinet forming the front of the image display device. . Therefore, when the sound level of the speaker is increased, especially when the sound level of the speaker installed in the video display device is increased, the shadow mask installed inside the CRT vibrates due to the vibration of the speaker, causing the screen to shake. (Howling) Phenomenon

This, howling phenomenon has a great influence on the quality of the image display device, conventionally, as shown in Figure 1, was provided with a dust-proof rubber that can cushion the vibration in the cabinet of the speaker and the image display device. 1 is an exploded perspective view of a video display device showing a state in which a speaker mounting bracket is used to prevent howling in the related art.

Referring to the drawings, the cabinet (1) for fixing and holding the CRT, the speaker (2) which is fastened to the rear of the cabinet (1) and outputs the voice, and the speaker (2) to the cabinet (1) It is composed of a vibration fixing rubber (4) for reducing the vibration of the speaker 2 is fastened and fixed between the speaker fixing bracket (3) for fixing and the cabinet and the speaker fixing bracket (3).

In order to prevent voice vibration occurring in the speaker 2 of the conventional video display device, the speaker 2 is fixed by using the speaker fixing bracket 3 on the rear side of the cabinet 1 for supporting the CRT. When the speaker 2 is fixed to the cabinet 1, a separate dustproof rubber 4 is inserted between the cabinet 1 and the speaker fixing bracket 3. Therefore, vibration is suppressed to the maximum by the anti-vibration rubber 4 fastened between the cabinet 1 and the speaker fixing bracket 3.

In addition, as another conventional embodiment, a ring is installed to amplify the sound output from the speaker, the dust-proof rubber is fastened to the connection portion of the ring and the speaker. This will be described based on FIG. 2. FIG. 2 is an exploded perspective view of an image display apparatus according to another exemplary embodiment, in which a speaker mounting enclosure is used to prevent howling.

Referring to the drawings, the CRT (5), the cabinet (1) for holding and holding the CRT (5), the speaker 2 is fastened to the rear of the cabinet (1) and outputs sound; Between the front of the cabinet (1) and the ring (6) to reduce the vibration generated by the sound from the ring (6) and the ringing sound (6) to fix the speaker 2 is fixed to the sound. Anti-vibration rubber (4) to be fastened is installed.

In the anti-howling structure according to another exemplary embodiment of the present invention, when an image is output from the CRT 5 when the user operates the image display device, a sound corresponding to the image is output from the speaker 2. Therefore, when the sound is output from the speaker 2, the vibration of the sound output by the ring 6 is prevented from being amplified, and at the same time, the vibration of the sound moved to the cabinet 1 by the dustproof rubber 4 is prevented. Will be reduced.

However, even when the anti-vibration rubber 4 is provided between the speaker 2 and the cabinet 1 as described above, or the anti-vibration rubber 4 is provided between the speaker 2 and the ring 6, the speaker 2 is provided. There is a problem that can not suppress the vibration generated in the source only to reduce the transmission of the original speaker vibration.

The present invention is to solve the above problems, the vibration of the sound output from the speaker is suppressed by the weight added to the weight of the speaker, the anti-howling structure of the video display device is not transmitted to other parts of the video display device The purpose is to provide.

According to the technical idea of the present invention for achieving the above object, the cabinet, the CRT installed in the cabinet, the speaker installed in the cabinet so that the sound is output in accordance with the image implemented in the CRT and the original weight of the speaker It is achieved by the anti-howling structure of the video display device including a weight that can add weight to the.

On the other hand, in another technical idea of the present invention for achieving the above object, a cabinet, a CRT which the image installed in the cabinet is implemented, an outer frame installed in the cabinet, and installed on one side of the outer frame And a magnet provided therein to form a magnetic circuit corresponding to the magnet, a voice coil provided in a magnetic circuit formed by the yoke, and a speaker vibrated by the voice coil to reproduce sound. And a weight preventing structure of the image display device including a weight having a weight installed on an outer frame adjacent to the diaphragm of the speaker.

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

3 is a perspective view of a video display device showing a state in which a howling prevention structure of the video display device according to the present invention is applied, and FIG. 4 is a perspective view of a speaker of the video display device according to the present invention.

Referring to the drawings, a lug 22 is formed at each corner of the CRT 20, and a fixing boss 12 is formed at the corner of the front cabinet 10 to which the lug 22 corresponds. In addition, the speaker 100 is installed in the cabinet 10 adjacent to the CRT 20, and the speaker 100 has an outer frame and a cabinet such that the speaker 100 is installed to face the front of the cabinet 10 so that sound is directed. It is fixedly supported by a separate fastening member (screw thread coupling to rivet coupling).

In addition, a weight 200 is installed at the rear center of the speaker 100 to add weight to the original speaker weight. The speaker 100 is generally installed in the cabinet 10 in the state of a semi-finished product, and when the CRT 20 and the speaker 100 are installed in the cabinet 10, the speaker 100 is generated at the sound output of the speaker 100. Weight 200 is installed in the rear center of the speaker 100 to suppress the vibration is transmitted to the other portion connected to the speaker 100, in particular, the weight 200 is in the rear center of the speaker 100 When installed, it is preferable that the weight 200 is completely fixed or integrally installed so as not to move.

Accordingly, the weight 200 is to reduce the vibration generated in the speaker 100 by the weight added to the original speaker weight. That is, since the amount of vibration generated during the sound output of the speaker 100 is inversely proportional to the weight of the object, the amount of vibration decreases as the weight of the speaker 100 becomes heavier.

See FIG. 5 to describe this in more detail.

5 is a cross-sectional view showing a state in which the weight for preventing howling is installed in the speaker of the present invention. Referring to the drawings, the speaker 100 has an outer frame 110 to form a skeleton of the speaker 100, the yoke 120 is provided to the rear of the outer frame 110. In addition, a donut-shaped magnet 130 is installed inside the yoke 120, and a bobbin 150 is installed around the magnet 130.

In addition, the diaphragm 140 is installed in front of the outer frame 110, the edge portion 180 is formed around the outer edge of the diaphragm 140. The edge portion 180 serves to regulate the vibration range of the diaphragm 140, the dust cap 190 is provided in the center of the diaphragm 140.

Meanwhile, the voice coil 160 is wound around the bobbin 150 so that a magnetic circuit may be formed in the magnet 130, the yoke 120, and the voice coil 160. In addition, the bobbin 150 extends to the boundary between the diaphragm 140 and the dust cap 190 to the left hand law of Fleming due to the direction of the current applied to the bobbin 140 and the magnetic field of the magnet 130. Accordingly, the diaphragm 140 is vibrated.

In addition, a damper 170 is provided in an inner space formed between the outer frame 110 and the diaphragm 140, and the damper 170 is also connected to the bobbin 150 to support the diaphragm 140. While, it plays a role of regulating the vibration range of the diaphragm 140.

Reference numeral 115 is a terminal for providing an electrical signal to the lead wire.

In the speaker according to the present invention having such a configuration, when an electrical signal is input through the terminal 115, a current is applied to the voice coil 160 placed in a magnetic circuit formed by the yoke 120 and the mark net 130. As it flows, the bobbin 150 oscillates back and forth.

By this principle, when the diaphragm 140 is moved forward, + sound pressure is generated. On the contrary, when the diaphragm 140 is moved backward,-sound pressure is generated and sound is output. The sound generated at this time can be listened to by the user when the value is between about 20 Hz and 20 Hz.

As described above, when the diaphragm 140 vibrates as the bobbin 150 moves forward and backward, a sound is output, and the vibration of the diaphragm 140 is also transmitted to the outer frame 110. The vibration transmitted to the outer frame 110 is also transmitted to the CRT 20 through the cabinet 10 to cause the howling phenomenon.

Therefore, since the howling phenomenon of the CRT 20 is not reduced when the external frame 110 of the speaker 100 is not vibrated, the amount of vibration generated during the sound output of the speaker 100 may be reduced. By using an inverse proportion to the weight, the weight 200 which can add weight to the outer frame 110 of the speaker 100 is installed.

The weight 200 is installed in the region closest to the epicenter of the vibration generated from the speaker 100, and thus, does not affect the forward and backward movement of the bobbin 150, thus increasing the weight of the yoke 120 or the speaker. The weight of the outer frame 110 itself forming a skeleton of the. However, since the weight increase of the yoke 120 and the outer frame 110 itself is directly connected to the increase in the volume of the speaker 100, the speaker is enlarged as a result.

In addition, as described above, since the speaker 100 is installed in the cabinet 10 of the image display device in a state of a semi-finished product, it is impossible to increase the weight of an existing speaker in a semi-finished state.

Therefore, in order to increase the weight of the speaker 100, the weight 200 is preferably installed as a separate structure in the outer diameter of the outer frame 110 in which the bobbin 120 is built. At this time, the weight 200 is implemented in the shape of a ring having an inner diameter, the inner diameter of the weight 200 is installed so as to fit with the outer diameter of the outer frame 110 in which the bobbin 120 is installed, the weight ( 200 and the outer frame 110 is fixed by an adhesive, or fixed by a separate fastening member is installed detachably.

Looking at the operation of the anti-howling structure of the image display device according to the present invention having the configuration as described above, the vibration generated when the sound output from the speaker 100 is transmitted to the outer frame 110 forming the skeleton of the speaker 100 When the weight of the outer frame 110 increases, the vibration amount of the speaker 100 decreases.

Therefore, even when sound is output from the speaker 100, the vibration is not generated in the outer frame 110 at the source so that the vibration is moved from the speaker 100 to the cabinet 10 through the outer frame 110. By suppressing the source, as a result, vibration does not occur in the shadow mask of the CRT 20, so that the image of the CRT is not shaken.

In addition, when the speaker 100 and the cabinet 10 are combined, the anti-vibration rubber 112 may be installed. The anti-vibration rubber 112 is interposed between the outer frame 110 and the cabinet 10 so that the anti-vibration rubber 112 secondly reduces vibration even though the vibration of the outer frame 110 is not completely reduced. Therefore, howling does not occur.

The anti-howling structure of the image display device according to the present invention is characterized in that the vibration generated when the sound is output from the speaker by the weight installed in the speaker is reduced by the weight of the speaker's own weight, so that the vibration generated in the speaker is reduced. It prevents the howling phenomenon by fundamentally inhibiting the movement to the CRT through the cabinet.

In addition, since the weight can be easily installed on the speaker in the semi-finished state, the parts can be made common, and the cost of production due to the redesign of the speaker and the increase of parts can be reduced.

On the other hand, the present invention is not limited only to the above-described embodiment, but can be modified and modified within the scope not departing from the gist of the present invention, the technical idea that such modifications and variations are also included in the claims Should be seen.

Claims (8)

Cabinet; A cathode ray tube installed in the cabinet; Speaker mounted to the cabinet so that the sound is output in accordance with the image implemented in the CRT; And And a weight having an inner diameter to be detachably attached to an outer frame forming the outer shape of the speaker to increase the self weight of the speaker. delete The method of claim 1, The weight is a howling prevention structure of a video display device, characterized in that coupled to the center of the rear of the speaker outer frame. Cabinet; A cathode ray tube in which an image installed in the cabinet is implemented; An outer frame installed in the cabinet; The yoke is provided on one side of the outer frame and provided with a magnet therein to form a magnetic circuit corresponding to the magnet, a voice coil provided in a magnetic circuit formed by the yoke, and the sound is vibrated by the voice coil. Speaker made of a diaphragm for playing; And And a weight having a weight installed on an outer frame adjacent to the diaphragm of the speaker. The method of claim 4, wherein The weight is a howling prevention structure of a video display device, characterized in that installed in the outer frame in which the yoke is installed. The method of claim 4, wherein The weight has a howling prevention structure of a video display device, characterized in that the shape of the ring having an inner diameter that is close to the outer diameter of the outer frame in which the yoke is installed. The method of claim 4, wherein The weight is a howling prevention structure of a video display device, characterized in that installed on the speaker detachable. The method of claim 1, Howling prevention structure of the video display device, characterized in that the dust-proof rubber is further mounted in the area between the speaker and the cabinet.

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