CN1988731B - Built in sound system of thin video frequency device - Google Patents

Abstract

The invention discloses a built-in sound system of a thin video device. The sound system adopts a two-frequency division labyrinth phase-inverted sound box, which includes a loudspeaker, a frequency divider, a guide tube, a box body, a high-pitched speaker and a low-pitched speaker. Among them, the structure of the cabinet is manufactured according to the internal space and capacity requirements of the video equipment, and the labyrinth guide tube is built in the cavity wall of the cabinet. In the built-in audio system of a thin video device of the present invention, the labyrinth guide tube forms a long bass channel in the box, and the bass is reflected in the bass channel for multiple times, which is doubled and then impacted by the wall and the desktop Reflecting and superimposing each other, the sound pressure of the airflow can be greatly enhanced, creating the most powerful, magnificent and shocking bass effect among all flat-panel TVs, notebook computers and other thin video devices, and realizing the HI-FI sound effect.

Description

A built-in sound system for a thin video device

technical field

The present invention relates to a built-in sound system of thin video equipment. the

Background technique

With the development of society and technology, thin video devices, such as flat-panel TVs and notebook computers, are favored by consumers because of their clear picture, thinness and small footprint. The traditional concept is that video equipment is used to watch programs, resulting in the sound quality performance of many brand video equipment, only using ordinary speaker units and simple technical processing. At the same time, as the requirements of existing consumers continue to improve, more and more consumers hope for a thin-shaped video device that not only advocates high-quality picture quality, but also needs a sound system with professional sound effects. There are large-scale video equipment with professional sound effects on the existing market, but the existing thin-shaped video still has the disadvantages that the low-frequency effect often fails to reach the expected effect and the bass is insufficient. That is because the space in the thin video equipment is so small that the industry thinks that it is impossible to install a sound system with professional sound effects in the thin video equipment. the

Contents of the invention

In order to overcome the shortcoming of lack of bass in the existing built-in audio system of thin video equipment, a built-in audio system of thin video equipment is provided, which greatly improves the bass effect without affecting the beautiful appearance of the video equipment. the

The present invention adopts the following technical scheme: a built-in sound system of a thin video device, the sound system adopts a two-way frequency-division labyrinth phase-inverted speaker, which includes a speaker, a frequency divider, a labyrinth guide tube, a box body, and a tweeter Loudspeakers and woofers, wherein the structure of the cabinet is manufactured according to the internal space and capacity requirements of video equipment, and the labyrinth guide tube is built into the cavity wall of the cabinet. the

The box includes a fixedly connected front frame and a rear cavity; the labyrinth guide tube is composed of upper and lower parts; the lower part is a labyrinth base, which is integrally formed by injection molding with the rear cavity of the box; the upper part is a piece of stamping A formed plastic sheet that acts as a seal; the plastic sheet is fastened with the labyrinth base to form a labyrinth guide to increase the bass channel so that the length of the labyrinth guide tube in the speaker can meet the needs of the bass dive. the

The direction of the labyrinth guide tube is uniform, and the cross-sectional area of each part of the labyrinth guide tube is approximately the same. the

The labyrinth base of described labyrinth guiding tube comprises:

Three first enclosure walls, second enclosure walls and third enclosure walls arranged side by side in sequence;

a fourth enclosure joining the right end of the first enclosure to the right end of the third enclosure; and

a fifth enclosure connecting the left end of the second enclosure to the left end of the third enclosure;

Wherein, the first surrounding wall, the second surrounding wall, the third surrounding wall, the fourth surrounding wall and the fifth surrounding wall form a spiral-like labyrinth base. the

The labyrinth base of the labyrinth guide tube is helical. the

The box body is fixedly connected to the thin video equipment, and a buffer pad with anti-vibration effect is added between the connections. the

The box is a special-shaped box, and its special-shaped surface matches the special-shaped structure in the thin-shaped video equipment; the special-shaped box is fixed to the special-shaped structure to reduce the space occupied by the special-shaped box. the

A buffer pad is provided between the rear cavity of the box and the front frame of the box to play a role of sealing and anti-vibration; between the plastic sheet of the labyrinth guide tube and the labyrinth base of the labyrinth guide tube, a cushion pad is provided to play a sealing role. Function and anti-vibration cushion. the

The cross-sectional area of the labyrinth guide tube is set at 20*20mm ² , and the total length is set at (175-185)mm.

The cross-sectional area of the labyrinth guide tube is set at 20*20mm ² , and the total length is set at 180mm to reduce the friction generated by the air flow in the labyrinth guide tube and reduce the resonance frequency of the box to 80Hz.

The drive unit of the speaker adopts a high-performance NdFeB magnet and a four-layer wound voice coil. the

The driving unit of the loudspeaker reduces the resonant frequency of the woofer to 95Hz, and the total quality factor value is 0.434. the

The front frame of the box is made of plastic, and the thickness of the front frame is 2.5mm, and the opening is stepped; the inner side of the opening is 1.8mm, and the outer side is 1.2mm, so as to reduce negative effects and make the sound quality balanced and natural. the

Both the tweeter and the woofer are fixedly connected to the front frame of the cabinet, and buffer pads are provided between the tweeter, the woofer and the cabinet, wherein the tweeter and the woofer are connected in parallel. the

The thin video equipment is a flat-panel TV and a notebook computer. the

The buffer pad is unit rubber with high elasticity and small foam structure. the

It also includes a built-in BBE electronic adjustment system, which is used to intelligently correct and restore the signal loss and phase deviation of the audio system. the

As can be seen from the above description of the structure of the present invention, compared with the background technology, the present invention has the following advantages:

One, in the built-in sound system of a kind of thin video equipment of the present invention, the labyrinth guide tube forms a longer bass channel in the cabinet, and the bass is reflected multiple times in the bass channel, which is multiplied and strengthened, and then passes through the wall and The impact and reflection of the desktop are superimposed on each other, and the sound pressure of the airflow can be greatly enhanced, creating the most powerful, magnificent and shocking bass effect among all flat-panel TVs, notebook computers and other thin video devices, and realizing the HI-FI sound effect ;

Second, the structure of the cabinet is manufactured according to the internal space and capacity requirements of the video equipment, so that the sound effect can be achieved and the internal space of the video equipment can be fully utilized;

Third, the base of the labyrinth and the rear cavity of the box body are integrally formed by injection molding. Since the box body is manufactured according to the internal space and capacity requirements of the video equipment, it is generally an irregular box body. In this technical solution, according to the internal space of the video equipment Due to the irregularity of the space, the manufacturing scheme of the integrated injection molding of the labyrinth base and the rear cavity of the cabinet is designed, which makes the manufacturing of the audio equipment a reality, and saves the space of the cabinet;

Fourth, the direction of the labyrinth guide tube is uniform and the cross-sectional area of each part of the labyrinth guide tube is roughly the same, reducing friction;

Its five, the labyrinth base of the labyrinth guide pipe comprises three successively side by side the first surrounding wall, the second surrounding wall, the third surrounding wall, the fourth surrounding wall connecting the end of the first surrounding wall and the end of the third surrounding wall And the fifth wall connecting the end of the second wall and the other end of the third wall. This structure is designed according to the internal space of the video equipment, so it can achieve the sound effect and save the space occupied by the built-in sound system. ;

Sixth, the cross-sectional area of the labyrinth guide tube is set at 20*20mm ² and the total length is set at (175-185) mm. Generally speaking, the larger the cross-sectional area of the labyrinth guide tube, the smaller the friction force, but the lower the bass. The dive is not deep, so it is necessary to find an optimal range for the cross-sectional area of the labyrinth guide tube according to the structure of the box. The range of the cross-sectional area of this technical solution can make the bass effect of the sound system good. Of course, if the cross-sectional area is set as 20*20mm ² and the total length is 180mm, the bass effect is the best;

Seventh, the whole machine has passed the machine vibration test, and sound-absorbing materials are installed in the necessary places of the whole machine, so as not to affect the picture quality due to the increase of the resonance coefficient of the whole machine while greatly improving the bass;

Eighth, the driver unit of the speaker is made of "driver king" neodymium iron boron material. Although its volume is small, its driving energy is 8 times that of ordinary speaker units, and the mid-bass effect is extremely prominent, so it can achieve sound effects and save built-in speakers. System footprint;

Ninth, the cushion pad is unit rubber with high elasticity and small foam structure, which has good sealing effect and good anti-vibration effect, which can effectively reduce noise distortion and make the midrange clearer and smoother;

Tenth, the front frame of the speaker uses plastic parts to make the overall appearance harmonious. At the same time, in order to overcome the low-frequency and high-frequency attenuation due to the use of plastic parts, the thickness of the front frame is set at 2.5mm during the design process, and the opening is stepped. The inner side of the hole is 1.8mm and the outer side is 1.2mm, which can greatly reduce the negative effect and make the sound quality balanced and natural;

Eleventh, the total quality factor value of the driver unit of the speaker is 0.434, this Q value ensures that the speaker and the speaker can be well matched;

Twelfth, if the screen is turned off, MP3 music will be played through the memory card or USB memory, the effect of this sound system is no less than that of a small sound system;

Thirteenth, the built-in BBE electronic adjustment system intelligently corrects and restores the signal loss and phase deviation of the sound system, correctly restores the original sound and reproduces the human voice naturally and truly;

Fourteenth, the seamless combination of built-in high-efficiency digital sub-power amplifier and digital audio source can effectively reduce the interference between signals. the

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings. the

Figure 1 is a perspective view of a special-shaped box. the

Fig. 2 Schematic diagram of the direction structure of the labyrinth guide tube. the

Fig. 3 is a schematic diagram of the disassembled state of the special-shaped speaker cabinet. the

Fig. 4 is a schematic diagram of the sound box assembled in the TV. the

Detailed ways

A kind of built-in sound system of flat-panel TV, as shown in Figure 1, 2, 3, 4, what this sound system adopted is two-way frequency-dividing labyrinth type phase-inverting sound box, and it comprises loudspeaker, frequency divider, labyrinth guide tube, box Body 1, tweeter 3, woofer 4 and built-in BBE electronic adjustment system. The audio system uses a two-way labyrinth phase-inverted speaker. the

As shown in Figures 1, 3 and 4, the structure of the cabinet 1 is manufactured according to the internal space and capacity requirements of the video equipment, and it is a special-shaped cabinet. The special-shaped surface of the special-shaped box matches the special-shaped structure in the flat-panel TV, and the special-shaped box is fixed to the special-shaped structure, which can reduce the space occupied by the special-shaped box. The special-shaped box includes a front frame 11 and a rear cavity 12 fixedly connected by screws, and a buffer pad with an anti-vibration effect is provided between the rear cavity 12 of the box body and the front frame 11 of the box body. Cell rubber of foam structure. The front frame 11 of the cabinet is made of plastic parts, and the thickness of the front frame is 2.5mm, and the opening is stepped; the inner side of the opening is 1.8mm, and the outer side is 1.2mm, so the negative effect can be reduced and the sound quality can be balanced and natural. The special-shaped box body 1 is connected with the LCD TV by screws, and a vibration-absorbing material is added in the middle, and the vibration-absorbing material is a unit rubber with a small foam structure of high elasticity. the

As shown in FIG. 2 , the labyrinth guide tube 2 is built into the cavity wall of the special-shaped box 1 . The labyrinth guide tube is composed of upper and lower parts, wherein, the lower part 21 is a labyrinth base, which is formed by injection molding together with the rear cavity 12 of the box; the upper part is a stamped plastic sheet 22, which is connected with the labyrinth base 21. The labyrinth guide is formed by screw locking and fastening to increase the bass channel so that the length of the labyrinth guide tube in the speaker can meet the needs of the bass dive. A buffer pad is provided between the plastic sheet 22 of the labyrinth guide tube and the labyrinth base 21 of the labyrinth guide tube, and the buffer pad is a unit rubber of a small foam structure with high elasticity. the

The direction of the labyrinth guide tube is uniform and the cross-sectional areas of the labyrinth guide tube are approximately the same. The cross-sectional area of the labyrinth guide tube is set at 20*20, and the total length of the labyrinth guide tube is set at (175-185) mm. After testing, the best cross-sectional area of the labyrinth guide tube is set at 20*20. The total length of the guide tube is set at 180mm, which can reduce the friction generated by the air flow in the labyrinth guide tube to the greatest extent, and reduce the resonance frequency of the box to 80Hz. The labyrinth base 21 of the labyrinth guide tube comprises three first surrounding walls 211, the second surrounding wall 212, the third surrounding wall 213, the first surrounding wall 211 end and the third surrounding wall 213 end connecting the first surrounding wall 213 arranged side by side in sequence. The four surrounding walls 214 and the fifth surrounding wall 215 connecting the end of the second surrounding wall 212 and the other end of the third surrounding wall 213 cooperate to form a quasi-spiral labyrinth base 21 . the

The drive unit of the speaker adopts high-performance NdFeB magnet and four-layer winding voice coil, and its drive unit adopts high-performance NdFeB magnet and four-layer winding voice coil. The loudspeaker's driver drives the woofer down to a resonant frequency of 95Hz with an overall quality factor value of 0.434. the

The tweeter 3 and the woofer 4 are fixedly connected to the front frame 11 of the box body, and buffer pads are arranged between the tweeter, the woofer and the box body, wherein the tweeter and the woofer are connected in parallel. the

The built-in BBE electronic adjustment system is used to intelligently correct and restore the signal loss and phase deviation of the audio system. the

There are two built-in sound systems symmetrically arranged on this flat-screen TV. The built-in sound system of the thin video device in this embodiment can be called a "bass hammer" sound system, the bass performance of the sound is greatly improved and the depth of the bass is 8 times that of ordinary thin video devices. the

The above is only a preferred embodiment of the present invention, so it cannot limit the scope of the present invention, that is, the equivalent changes and modifications made according to the patent scope of the present invention and the content of the specification should still belong to the patent of the present invention within the scope covered. the

Claims (9)

1. the built-in sound system of a thin type video equipment; It is characterized in that: what this sound system adopted is two divided-frequency labyrinth type reflex cabinet; It comprises loud speaker, frequency divider, labyrinth type guide pipe, casing, loudspeaker and bass horn; Wherein, the structure of casing is to form according to video equipment inner space and capacity requirement manufacturing, and the labyrinth type guide pipe is built on the cavity wall of casing;

Said casing comprises preceding frame and the rear chamber that is fixedly connected; The labyrinth type guide pipe divides two part compositions up and down; Wherein, the bottom is divided into the labyrinth base, and itself and the injection moulding of casing rear chamber one form; Top is divided into the plastic sheet that seals of a drawing; The fastening formation labyrinth type of this plastic sheet and labyrinth base guiding makes labyrinth type guide pipe length in the audio amplifier can satisfy the needs of bass dive to increase bass channel;

Said casing is special-shaped casing, and the polymorphic structure in its shaped face and the thin type video equipment is complementary; The abnormity casing is fixed in polymorphic structure identically, takes up room to reduce special-shaped casing.

2. the built-in sound system of a kind of thin type video equipment according to claim 1 is characterized in that: said labyrinth type guide pipe trend is even, and the area of section everywhere of labyrinth type guide pipe is roughly the same.

3. the built-in sound system of a kind of thin type video equipment according to claim 2 is characterized in that: the labyrinth base of said labyrinth type guide pipe comprises:

Three front and back are side by side first leg, second leg and the 3rd leg successively;

The wall all around that connects the first leg right part and the 3rd leg right part; And

The 5th leg that connects the second leg left part and the 3rd leg left part;

Wherein, all around wall and the 5th leg are formed a type spiral helicine labyrinth base for first leg, second leg, the 3rd leg, the.

4. the built-in sound system of a kind of thin type video equipment according to claim 1 is characterized in that: said casing is fixedly linked in the thin type video equipment, is equipped with the cushion pad with antihunt action between this connection.

5. the built-in sound system of a kind of thin type video equipment according to claim 1 is characterized in that: be provided with the cushion pad that plays sealing process and antihunt action between the frame before said casing rear chamber and the casing; Be provided with the cushion pad that plays sealing process and antihunt action between the labyrinth base of the plastic sheet of labyrinth type guide pipe and labyrinth type guide pipe.

6. the built-in sound system of a kind of thin type video equipment according to claim 1 is characterized in that: the cross-sectional area of said labyrinth type guide pipe is decided to be 20*20mm ², total length is decided to be (175～185) mm.

7. the built-in sound system of a kind of thin type video equipment according to claim 1; It is characterized in that: the driver element of said loud speaker adopts high-performance neodymium-iron-boron magnet and four layers of coiling voice coil loudspeaker voice coil; And the driver element of loud speaker makes the bass horn resonance frequency drop to 95Hz, and total quality factor value is 0.434.

8. the built-in sound system of a kind of thin type video equipment according to claim 2; It is characterized in that: said loudspeaker all is fixedly connected the preceding frame of casing with bass horn; And be equipped with cushion pad between loudspeaker, bass horn and the casing; Wherein, loudspeaker adopts parallel way to be connected with bass horn.

9. the built-in sound system of a kind of thin type video equipment according to claim 2 is characterized in that: also comprise built-in BBE electronics Adjustment System, the loss of signal and phase deviation that it is used for intelligentized correction and recovers sound system.

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