JP2009038446A - Speaker box structure and thin display device with the speaker box mounted - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a speaker box for preventing wind sound of a speaker chattering noise and vibrations of a television body with the speaker mounted in the case of reproducing low-pitched sound by making the speaker mounted on a television body small and thin and simultaneously achieving high quality reproduction. <P>SOLUTION: In a bass reflex speaker, the thinness of the speaker box and high sound quality reproduction are achieved by making a speaker cabinet part housing the speaker body and a duct part a vertical two-stage structure in which they are connected only by their connection openings. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a thin speaker box structure that realizes high-quality sound reproduction and includes a speaker cabinet and a duct arranged outside the speaker cabinet, and a thin display device equipped with the speaker box.

  In recent years, in the television market, the enlargement of the television screen and the thinning of the television body are rapidly spreading. Accordingly, there is a demand for smaller and thinner speakers.

  There are a side speaker type and an under speaker type as a speaker mounting form on the television main body. The side speaker type is a type in which speaker panels (L, R) are attached to the left and right sides of the display, and the under speaker type is a speaker panel attached to the lower side of the display, and the left and right (or center) inside the speaker panel. There is also a built-in speaker body.

  Conventionally, there has been a type in which a speaker is separated from a television body in order to realize a reduction in size and thickness of the speaker. However, this type requires a TV rack rack and external speakers and AV amplifiers mounted on the rack rack, and is not suitable for thin TVs that are smart due to the thin TV body. It was.

  Further, the type in which the speaker is fixed to the casing of the television main body needs to make the speaker main body and / or the speaker box small and thin, and at the same time, it is very difficult to maintain high sound quality.

  In general, bass reflex type speakers are widely used as speakers for realizing powerful high-quality sound reproduction. The bass reflex type speaker is provided with a duct in order to enhance the bass reproduction capability, and the phase of the sound emitted from the back of the speaker diaphragm is reversed and radiated to the outside through the duct. It is designed to enhance the radiating bass characteristics.

  However, in order to ensure a certain level of bass reproduction capability, it is necessary to ensure a sufficient length and volume of the duct, which makes it difficult to reduce the size and thickness of the bass reflex speaker.

Furthermore, as a common problem when reproducing sound with a speaker main body or speaker box attached, it is necessary to solve simultaneously the prevention of wind noise of the speaker box and the prevention of chatter noise and vibration of the TV main body particularly during low sound reproduction.
JP 5-183976 JP-A-6-217385 JP2004-343548

  Therefore, the present invention provides a small and thin bass reflex type speaker that realizes high-quality sound reproduction and prevents a chatter sound and vibration of the display device body when attached to the display device. In addition, a speaker structure in which a speaker body is housed in the speaker box is provided. Furthermore, a thin display device including the speaker box is provided.

  (1) The present invention provides a speaker box comprising: a speaker cabinet that houses a speaker; and a duct that is formed on a wall that is exposed to the outside except for a connecting and fixing part of the speaker cabinet. .

  (2) The present invention provides the speaker box according to (1), wherein the duct is disposed on an upper portion of the speaker cabinet.

  (3) The present invention provides the speaker box according to (2), wherein a connection port connecting the inside of the speaker cabinet and the duct space is provided on the upper surface side of the speaker cabinet.

  (4) In the speaker box according to any one of (1) to (3), the speaker cabinet includes a fixing portion for fixing a plurality of speaker bodies for different sound ranges. provide.

  (5) The present invention provides the speaker box according to any one of (1) to (4), wherein the duct has a substantially circular cross section.

  (6) In the invention, any one of (1) to (5) is characterized in that the fixing unit fixes the speaker body so that the speaker body is disposed obliquely upward in the speaker cabinet. A speaker box according to claim 1 is provided.

  (7) The present invention is characterized in that the back surface of the speaker body fixed to the fixed portion of the speaker cabinet is formed non-parallel to the diaphragm of the speaker body. A speaker box according to any one of the above is provided.

  (8) In the invention, any one of (1) to (7) is characterized in that an eaves portion is provided on at least a part of the peripheral portion of the speaker body fixed to the fixing portion of the speaker cabinet. The speaker box described in 1. is provided.

  (9) The present invention provides the speaker box according to any one of (1) to (8), wherein a rear surface of the outside air outlet of the duct is formed in a curved surface.

  (10) The present invention provides the speaker box according to (4) subordinate to (2), wherein the fixing unit is configured to arrange the plurality of speakers side by side.

  (11) The present invention provides the speaker box according to any one of (1) to (10), wherein an outside air outlet of the duct is arranged in a direction other than the front surface of the speaker.

  (12) The present invention provides a speaker structure in which a speaker body is housed in the speaker box according to any one of (1) to (11).

  (13) The present invention is characterized in that a speaker main body for relatively low sounds is disposed on a side close to the connection port, and the speaker main body is housed in a speaker box subordinate to (4). The speaker structure described in 12) is provided.

  (14) The present invention provides a thin display device comprising the speaker box according to any one of (1) to (11).

  (15) The present invention provides the thin display device according to (14), characterized in that at least a part of the liquid crystal display structure or plasma display structure of the thin display device is arranged on the upper part of the speaker cabinet.

  (16) The present invention provides the thin display device according to (14) or (15), wherein at least a part of the liquid crystal display structure or plasma display structure of the thin display device is disposed on the front surface of the duct.

  According to the present invention, high-quality sound reproduction is realized simultaneously with downsizing and thinning of the speaker box. In addition, the bass sound characteristic of bass reflex type speakers is enhanced. Furthermore, it is possible to prevent wind noise of the speaker box during low sound reproduction and chatter noise and vibration of the TV main body, which are common problems when reproducing sound with a speaker main body or speaker box attached.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, this invention should not be limited to these embodiments at all, and can be implemented in various modes without departing from the gist thereof. The first embodiment relates to claims 1 to 3, claim 12, claim 14, and the like. The second embodiment relates to claims 4 to 14 and the like. The third embodiment relates to claims 14 to 16 and the like.
<< Embodiment 1 >>
<Embodiment 1: Overview>

The present embodiment is a bass reflex type speaker box comprising a speaker box that houses a speaker, and a duct that is formed on a wall that is exposed to the outside except for a connection fixing part to the speaker box, and a speaker body on the speaker box. It is a thin display device including a stored speaker structure and the speaker box.
<Embodiment 1: Configuration>

  FIG. 1 shows a conceptual diagram for explaining the present embodiment. (A) shows a front view and (b) shows a rear view. The speaker box of the present embodiment includes a speaker cabinet (0101) for storing speakers and a duct (0102). Sound waves radiated from the back of the speaker are radiated to the outside through the duct from the duct outlet (0103b). The flow of sound waves inside the speaker box is indicated by arrows.

  The speaker box has a speaker cabinet and a duct integrated into a two-part structure composed of a front speaker box and a rear speaker box. The divided surface is fixed with an adhesive member and then tightened with screws. FIG. 2 is a perspective view and a cross-sectional perspective view of the present embodiment. FIG. 3 is a front view of a divided surface of the front speaker box (a), a perspective view of the divided surface of the front speaker box (b), and a divided surface of the rear speaker box. The front view (c) of FIG. 2 and the perspective view (d) of the division surface of a back speaker box are shown. The speaker cabinet (0201, 0301) and the duct (0202, 0302) are connected only at the connection fixing portion (0203, 0303), and the duct is configured by a wall exposed to the outside of the speaker cabinet. . Consisting of the wall exposed to the outside means that, unlike the conventional one, the duct and the speaker cabinet are arranged independently and are configured to be partially connected. Further, the interior of the speaker cabinet and the duct space are merely connected by a connection port (0304), and the duct independently has a different space that is only partially connected to the interior of the speaker cabinet. Thereby, it is possible to secure a necessary duct volume and obtain a desired sound characteristic, and at the same time to make the speaker box thinner. Further, since the front speaker box and the rear speaker box are divided into two parts, when the speaker main body to be accommodated is changed to a speaker main body having a different size, the connection portion of the speaker box remains the same as before, and the front or rear This can be dealt with by increasing the depth of either speaker cabinet. The same applies to the case where the volume of the duct is changed.

  The arrangement of the speaker cabinet and the duct constituting the speaker box is not particularly limited as long as the speaker box is thin, but the longitudinal direction of the speaker cabinet and the duct are aligned to form a two-stage structure when viewed from the side. This arrangement is preferable in that the thickness of the speaker box can be suppressed. Furthermore, as shown in the side view of the present embodiment in FIG. 4, it is preferable that the upper stage is a duct (0401) and the lower stage is a speaker cabinet (0402), which is substantially L-shaped when viewed from the side. In such an arrangement, as shown in FIG. 5, when the speaker box (0502) is housed in the casing of the thin display device (0501), the thickness added to the thin display device by mounting the speaker box. This is because the thickness of the duct is reduced and the thickness of the entire thin display device can be suppressed. (A) shows a side speaker type, and (b) shows an under speaker type. The case (b) is also effective in that the thin display can be fixed to the top of the L-shaped speaker box.

The connection port between the speaker cabinet and the duct space is preferably provided at a position farthest from the outside air outlet of the duct. This is because it is necessary to secure a sufficient duct length in order to enhance the bass characteristic that is a characteristic of the bass reflex type speaker. Further, when the speaker cabinet and the duct are arranged in a two-stage structure as shown in FIGS. 4 and 5, the connection port is preferably provided on the upper surface side of the speaker cabinet. Here, the upper surface side of the speaker cabinet means the upper surface when the longitudinal direction of the speaker cabinet and the duct are aligned and the longitudinal direction is horizontal.
<Embodiment 1: Effect>

By disposing the duct outside the speaker cabinet, it is possible to reduce the thickness of the speaker box and secure the necessary duct volume.
<< Embodiment 2 >>
<Embodiment 2: Overview>

In this embodiment, the speaker cabinet having a fixing portion for fixing a plurality of speaker bodies for different sound ranges, a bass reflex type speaker box composed of a duct, and the speaker body is housed in the speaker box. A thin display device including a speaker structure and the speaker box.
<Embodiment 2: Configuration>

  FIG. 6 shows a conceptual diagram of the speaker box of the present embodiment. The speaker box (0601) of the present embodiment is a bass-reflex type speaker box including a fixing portion (0603) for fixing a plurality of speaker bodies (0602) for different sound ranges and a duct (0604).

  The reason why the fixing unit fixes a plurality of speaker bodies for different sound ranges is to prevent resonance that occurs when a speaker body having the same sound range is fixed to one speaker box. A plurality of speakers for different sound ranges means two or more kinds of speakers for different sound ranges. In a speaker intended to produce a specific sound range, even two types of speakers for low and medium / high sounds may be used. There may be three kinds of loudspeakers for bass, medium and treble, or more. In the case of a full-range speaker, a plurality of speakers that use different sound ranges by electrical signal processing may be used.

  Furthermore, it is preferable that a plurality of speaker bodies be arranged side by side. In the case of a two-stage upper and lower structure in which ducts are arranged on the upper part of the speaker cabinet as shown in FIG. 4 or FIG. 5, by arranging a plurality of speakers side by side, the length of the duct corresponding to the sum of the widths of the speaker bodies can be obtained. This is because it can be secured. Thereby, even if it is thin, the bass characteristic which is the characteristic of a bass-reflex type speaker can be strengthened.

  When a plurality of different sound range speaker bodies are fixed, it is preferable that the connection port connecting the inside of the speaker cabinet and the duct space is disposed on the side relatively close to the speaker body for low sound. FIG. 7 shows a conceptual diagram in the case where the connection port is arranged on the side closer to the speaker body for relatively low sounds. When the speaker main body for high sound (0701), the speaker main body for medium sound (0702), and the speaker main body for bass sound (0703) are fixed side by side, the connection port is closer to B than A and closer to C than B. Deploy. This is because sound waves from the back surface of the speaker are directly radiated to the inner surface of the speaker cabinet and the vibration of the speaker box and the thin display device on which the speaker box is mounted is suppressed. This is because the flow rate of sound waves radiated from the back surface of the speaker body is larger as the sound is lower, so that sound waves having a higher flow rate can be smoothly guided to the duct and radiated to the outside through the duct.

  The cross-sectional shape of the duct is not particularly limited, but a streamline type is preferable for improving wind flow, and a substantially circular shape is preferable. This is because a sufficient volume of the duct can be secured and the bass characteristic can be enhanced, and at the same time, the generation of wind noise inside the duct can be prevented. The substantially circular shape includes a circular shape, a vertical elliptical shape, a horizontal elliptical shape, and the like. In order to suppress the thickness of the speaker box, it is particularly preferable that the cross-sectional shape is an elliptical shape. Here, the vertical elliptical shape refers to a vertical elliptical shape when the longitudinal direction of the speaker cabinet and the duct are aligned and the longitudinal direction is horizontal. Furthermore, as shown in FIG. 8, by making the back surface (0802) of the outside air outlet of the duct (0801) into an arcuate curved surface, it is possible to prevent the generation of wind noise at the duct outlet.

  Further, when the speaker box is thin, the distance between the back surface of the speaker body and the inner surface of the speaker cabinet becomes very short. In this case, all the sound waves radiated from the back surface of the speaker body collide with the inner surface of the speaker cabinet, and vibration of the speaker box and vibration of a thin display device or the like equipped with the speaker box occur. For this reason, it is necessary to disperse the sound waves radiated from the speaker body and suppress the vibration of the speaker box and the like. Therefore, as shown in FIG. 9, the fixing portion fixes the central axis (0903) of the diaphragm (0902) of the speaker main body (0901) so as to be disposed obliquely upward with respect to the inner surface (0904) of the speaker cabinet. Is preferred. This is because the emitted sound wave can be dispersed and prevented from hitting the speaker cabinet inner surface (0904) vertically. Furthermore, when the speaker cabinet and the duct (0908) have a two-stage structure, and the duct is provided in the upper stage, the diaphragm is disposed obliquely upward with respect to the inner surface of the speaker cabinet, so that the sound wave enters the duct. It is also effective in that it is easy to release.

  Further, as shown in FIG. 10, the sound wave radiated from the back surface of the speaker main body is prevented from hitting the inner surface of the speaker cabinet vertically, and the speaker cabinet inner surface (1001) is placed on the diaphragm (1002) of the speaker main body (1002). 1003) and may be formed non-parallel.

  Furthermore, an eaves part is provided in at least a part of the peripheral part of the speaker body fixed to the fixing part. FIG. 11 is a conceptual diagram showing the transmission of sound when the eaves are not provided (a) and when the eaves are provided (b). If the eaves are not provided, the sound emitted from the speaker is dispersed in all directions ahead, and the sound leaks into the space inside the speaker cabinet. On the other hand, when the eaves part (1101) is provided, the sound transmitted from the speaker is limited in the direction in which the sound is transmitted by the eaves part, so that dispersion of the sound can be suppressed.

  The position where the eaves portion is provided may be matched with the characteristics of the speaker body, for example, the sound range, the position where the speaker box is mounted on the thin display device, or the like. In the case of an underspeaker type in a thin display device, the eaves portion is provided above the peripheral portion of the speaker body in order to suppress the sound emitted from the speaker from spreading over the entire space where the thin display device is installed. Preferably, you may provide in a side part.

Also, the outside air outlet of the duct is preferably arranged in a direction other than the front surface of the speaker. This is because, when arranged on the front surface of the speaker, depending on the structure of the speaker box, the sound wave radiated from the outside air outlet of the duct may be directly radiated to the display of the thin display device. When a speaker box is mounted on a wall-mounted thin display device, since the gap between the outside air outlet of the duct and the wall on which the thin display device is hung is narrow, the outside air outlet of the duct It is preferable to arrange in the direction.
<Embodiment 2: Effect>

At the same time as making the speaker box thinner, it enhances the bass characteristics that are characteristic of bass-reflex speakers and achieves high-quality sound reproduction.
<< Embodiment 3 >>
<Embodiment 3: Overview>

The present embodiment is a thin display device including the speaker box of the first and second embodiments.
<Embodiment 3: Configuration>

  This embodiment is shown in FIG. The liquid crystal display or plasma display (0905) of the thin display device is at least partially disposed on the speaker cabinet (0907) of the speaker box (0906). Further, at least a part of the liquid crystal display or the plasma display is disposed in front of the duct (0908) of the speaker box.

The phrase “a part of the display is arranged on the upper part of the speaker cabinet” means that the part of the display is placed on an L-shaped speaker box when viewed from the side. That at least a part of the display is arranged in front of the duct of the speaker box means that the duct part of the speaker box and a part of the display overlap when the thin display device is viewed from the back. It means being.
<Embodiment 3: Effect>

The thickness of the speaker cabinet can be saved by the thickness of the display, and at the same time, the display can be fixed. Further, the bezel of the thin display device can be narrowed.
<Example>

  The present invention will be specifically described with the following examples. In addition, the said Example is only illustrated and this invention is not limited at all by this Example.

  FIG. 12 shows a thin display device on which the speaker box of this embodiment is mounted. Two types of speaker bodies for medium / low sound (1201) and medium / high sound (1202) are fixed to the speaker cabinet (1203). In such a case, the middle / high tone speaker main body (1202) is arranged outside both ends of the thin display device, and the middle / low tone speaker main body (1201) is arranged inside both ends. This is because treble has a characteristic that directivity is strong and the sound is transmitted in a straight line, so that the stereo feeling can be enhanced by arranging the middle and high tone speaker bodies (1202) apart from both ends. In addition, the bass is less directional and the sound is more likely to spread, so the placement location is more flexible than the loudspeaker. Furthermore, since it is assumed that the viewer will watch near the center toward the thin display device, it suppresses the mixing of high sounds from the mid / high speakers and low sounds from the mid / low speakers. This is also effective.

The front view and back view for showing an example of this invention. The perspective view and sectional perspective view for showing an example of the present invention. The exploded view for showing an example of the present invention. The side view for showing an example of the present invention. An example of the thin display device of the present invention. FIG. 6 is a front view illustrating an example of a second embodiment. The conceptual diagram which shows the position of the connection port of Embodiment 2. FIG. The rear view of Embodiment 2. FIG. Side surface sectional drawing of Embodiment 2. FIG. Side surface sectional drawing of Embodiment 2. FIG. The conceptual diagram which shows the transmission of the sound of Embodiment 2. FIG. FIG. 9 is a front view illustrating an example of a third embodiment.

Claims (16)

A speaker cabinet for storing speakers;
A duct formed on the wall exposed to the outside, except for the connection fixing part with the speaker cabinet,
A speaker box consisting of   The speaker box according to claim 1, wherein the duct is disposed on an upper portion of the speaker cabinet.   The speaker box according to claim 2, wherein a connection port that connects the interior of the speaker cabinet and the duct space is provided on an upper surface side of the speaker cabinet.   The speaker box according to any one of claims 1 to 3, wherein the speaker cabinet has a fixing portion for fixing a plurality of speaker bodies for different sound ranges.   The speaker box according to any one of claims 1 to 4, wherein the duct has a substantially circular cross section.   The speaker box according to any one of claims 1 to 5, wherein the fixing portion fixes the speaker such that the speaker body is disposed obliquely upward in the speaker cabinet.   The speaker box according to any one of claims 1 to 6, wherein a rear surface of the speaker main body fixed to the fixing portion of the speaker cabinet is formed non-parallel to a diaphragm of the speaker main body.   The speaker box according to any one of claims 1 to 7, wherein an eaves portion is provided on at least a part of a peripheral portion of the speaker main body fixed to the fixing portion of the speaker cabinet.   The speaker box according to any one of claims 1 to 8, wherein a rear surface of the outside air outlet of the duct is formed with a curved surface.   The speaker box according to claim 4, which is dependent on claim 2, wherein the fixing portion is configured to arrange the plurality of speakers side by side.   The speaker box according to any one of claims 1 to 10, wherein an outside air outlet of the duct is arranged in a direction other than the front surface of the speaker.   The speaker structure which accommodated the speaker main body in the speaker box as described in any one of Claim 1 to 11.   The speaker structure according to claim 12, wherein the speaker body is housed in a speaker box subordinate to claim 4, wherein a speaker body for relatively low sound is disposed on a side close to the connection port.   A thin display device comprising the speaker box according to claim 1.   The thin display device according to claim 14, wherein at least a part of the liquid crystal display structure or the plasma display structure of the thin display device is arranged on an upper part of the speaker cabinet.   The thin display device according to claim 14 or 15, wherein at least a part of the liquid crystal display structure or the plasma display structure of the thin display device is disposed on the front surface of the duct.

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