JP2008131540A - Speaker system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact and thin speaker system which outputs a sound giving a distinctive localization feeling of a sound image without lowering sound quality in a low range. <P>SOLUTION: On the front wall 11 of a housing 11 of the speaker system, a tweeter 3, a woofer 2, and the opening portion 25 of a sound guide tube 20 are arranged in this order along the length L. The sound guide tube 20 propagates a sound in the low range amplified through resonance of a diaphragm 10 with a sound wave from the woofer 2 to emit the sound from the opening portion 25. The opening portion 25 is in a wide shape which is short along the length L and long along the width W. The opening portion 25 which emits the sound in the low range and woofer 2 are made close to each other, and the opening portion 25 which emits the sound in the low range and the tweeter which emits a sound in the high range 3 are separated, so the sound can be emitted to a listener while giving the distinctive localization sensation of the sound image. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a speaker device that converts an electric signal into sound and emits the sound, and more particularly to a thin speaker device for wall embedding that has a small thickness in the depth direction.

2. Description of the Related Art Conventionally, speaker devices having various structures exist as speaker devices that convert electric signals into sound and emit sound. In such a speaker device, the reproducible frequency band is determined by the shape and characteristics of the speaker unit. Generally, the smaller the aperture, the better the high frequency reproduction, and the larger the aperture, the better the low frequency reproduction. Therefore, when the shape of the speaker device is reduced, the diameter of the speaker unit is inevitably reduced, and the low-frequency reproduction characteristics tend to be poor. As a method for solving this, various low frequency auxiliary reproduction means are disclosed. For example, generally, a bass port, a drone cone, or a back load horn is added to the housing of the speaker device. Specifically, Patent Document 1 adds a back load horn, and amplifies the sound generated on the back side of the speaker unit with the back load horn and emits the sound.
JP 2000-92583 A

  By the way, as a use application of a speaker apparatus, it arrange | positions in a comparatively small space like a karaoke box, and may emit a sound with respect to a specific person, ie, a singer and a listener. When the speaker device is arranged in such a small space, the size of the speaker device should be small. For this reason, if it is a speaker apparatus provided with both a high sound range tweeter and a bottom middle sound range woofer, an opening part, such as a back load horn, will be arrange | positioned in the vicinity of a tweeter from a viewpoint of size reduction.

  However, with such an arrangement, the sound from the tweeter and the sound from the low-frequency playback unit such as the backload horn are emitted in the immediate vicinity, so that it is solid for singers and listeners on the listening side. Sound image and localization.

  Accordingly, an object of the present invention is to provide a speaker device that can reproduce a powerful heavy bass and has a good sound balance while being small.

  The present invention is a substantially rectangular parallelepiped housing having a first wall and a second wall facing each other, and a speaker unit disposed on the first wall, and the first wall and the second wall of the housing Is a speaker device in which the thickness, which is the installation interval, is shorter than the length and width of the first and second walls. The speaker device is disposed along the second wall between the second wall and the speaker unit, has a fixed end fixed to the housing, and emits sound from the speaker unit to the first wall and the first wall. A vibration member that resonates and vibrates with a direction connecting the two walls as a main vibration direction, and a sound guide tube that has an opening formed in the first wall and guides a sound wave generated by the vibration member to the opening. In this speaker device, the plurality of speaker units are arranged on the first wall in the order of the range of sound to be reproduced along the length direction. Furthermore, the opening of the sound guide tube has a wide shape having a width substantially matching the width of the first wall, and sandwiches the speaker unit that reproduces the low frequency range, and faces the speaker unit that reproduces only the higher frequency range than the low frequency range. It is characterized by being installed on the side to be.

  In this configuration, the speaker units are arranged in the order of sound ranges to be reproduced, with the length direction as the arrangement direction, on the first wall serving as the sound emitting surface of the thin casing. For example, in the configuration with the smallest number of speaker units, a tweeter that is a speaker unit that reproduces a high sound range and a woofer that is a speaker unit that reproduces a middle sound range and a low sound range are arranged along the length direction. The The opening of the sound guide tube is disposed in the vicinity of the speaker unit that reproduces the low sound range, on the side facing the speaker unit that reproduces the sound range higher than the speaker unit. In the above example, the opening of the sound guide tube is disposed on the side facing the tweeter in the vicinity of the woofer. That is, the tweeter, the woofer, and the opening of the sound guide tube are arranged in the order of the length of the first wall. With this configuration, the amplified low sound is emitted from the vicinity of the speaker unit that reproduces the low sound range. At this time, the opening of the sound guide tube has a wide width perpendicular to the arrangement direction and a short length along the arrangement direction, so even if the opening of the sound guide tube is formed, the area of the first wall is Not so big.

  In the speaker device of the present invention, the speaker unit is configured by a plurality of single speaker units whose sound ranges to be reproduced are different except for the ends of the sound ranges. The speaker unit array pattern of this speaker device is a single speaker unit that reproduces the middle sound range and the low sound range so that the sound range that is reproduced in order toward both ends of the array is lowered centering on the single speaker unit that reproduces the high sound range. Are arranged. Furthermore, the sound guide tube of this speaker device is characterized in that it is arranged on both ends of a single speaker unit that reproduces a low sound range.

  In this configuration, the speaker units are arranged in the order of sound ranges to be reproduced, with the length direction as the arrangement direction, on the first wall serving as the sound emitting surface of the thin casing. At this time, the speaker unit that reproduces the highest range is arranged at the center in the arrangement direction, and the speaker unit that reproduces the lower range gradually from the speaker unit that reproduces the high range sequentially toward both ends in the arrangement direction. Next, speaker units that reproduce the lowest range are arranged at both ends in the arrangement direction. And the opening part of a sound guide tube is arrange | positioned in the vicinity of the speaker unit of the both ends of an arrangement direction at the edge part side further along the arrangement direction. The sound guide tube has a dimension (width) in a direction perpendicular to the arrangement direction longer than a dimension (length) in the arrangement direction. A vibration member that amplifies low-frequency sound is formed at the back of the sound guide tube, and the sound amplified by the vibration member is propagated through the sound guide tube and emitted from the opening to the outside. Is done. With such a configuration, the amplified low sound is emitted from the vicinity of the speaker unit that reproduces the low sound range. At this time, the opening of the sound guide tube has a wide width perpendicular to the arrangement direction and a short length along the arrangement direction, so even if the opening of the sound guide tube is formed, the area of the first wall is Not so big.

  Further, the speaker device of the present invention has a full sound range reproduced by a plurality of single speaker units whose sound ranges to be reproduced differ from each other except for an end of the sound range, and a plurality of single speaker units having different sound ranges to be reproduced. And a full-range speaker unit that reproduces. The speaker unit array pattern of this speaker device is a single speaker unit that reproduces the middle sound range and the low sound range so that the sound range that is reproduced in order toward both ends of the array is lowered centering on the single speaker unit that reproduces the high sound range. Are arranged, and the entire sound range speaker unit is arranged on both ends of the single speaker unit that reproduces the low sound range. Further, the sound guide tube of this speaker device is characterized in that it is arranged on both end sides of the full-range speaker unit.

  In this configuration, the speaker units are arranged in the order of sound ranges to be reproduced, with the length direction as the arrangement direction, on the first wall serving as the sound emitting surface of the thin casing. At this time, the speaker unit that reproduces the highest range is arranged at the center in the arrangement direction, and the speaker unit that reproduces the lower range gradually from the speaker unit that reproduces the high range sequentially toward both ends in the arrangement direction. Next, speaker units that reproduce the lowest range are arranged at both ends in the arrangement direction. Further, a full-range speaker unit that reproduces the entire sound range is arranged further along the arrangement direction of the speaker units that reproduce the lowest sound range. And the opening part of a sound guide tube is arrange | positioned in the vicinity of the whole sound range speaker unit of the both ends of an arrangement direction at the edge part side further along the arrangement direction. The sound guide tube has a dimension (width) in a direction perpendicular to the arrangement direction longer than a dimension (length) in the arrangement direction. A vibration member that amplifies low-frequency sound is formed at the back of the sound guide tube, and the sound amplified by the vibration member is propagated through the sound guide tube and emitted from the opening to the outside. Is done. With such a configuration, sound in which only the low sound range is amplified is emitted from the vicinity of the full sound range speaker unit that reproduces the full sound range including the low sound range. At this time, the opening of the sound guide tube has a wide width perpendicular to the arrangement direction and a short length along the arrangement direction, so even if the opening of the sound guide tube is formed, the area of the first wall is Not so big.

  According to the present invention, it is possible to realize a speaker device that reproduces more powerful bass sound with a simple structure without breaking the balance of sound to be emitted while being small and thin.

A speaker device according to a first embodiment of the present invention will be described with reference to the drawings.
1A and 1B are three views of the speaker device of the present embodiment, in which FIG. 1A is a front view, FIG. 1B is a side cross-sectional view, and FIG. 1C is a back view with the back wall 4 removed.
As shown in FIG. 1, the speaker device of the present embodiment includes a housing 1, a woofer 2 that is a speaker unit that mainly reproduces a low sound range and a middle sound range, and a tweeter 3 that is a speaker unit that mainly reproduces a high sound range.

  The housing 1 has a substantially rectangular parallelepiped shape including a front wall 11, a back wall 4, a top wall 12, a bottom wall 13, and two side walls 15. The length L and the width W corresponding to the longitudinal direction and the lateral direction of the front wall 11 of the housing 1 are larger than the thickness D (D << W, L) corresponding to the distance between the front wall 11 and the back wall 4. It is formed in a sufficiently long shape. In the speaker device shown in FIG. 1, the length L is formed to be longer than the width W (W <H). The back wall 4 is detachably installed on the housing 1.

In the front wall 11 of the housing 1, an opening 25 of the horizontal tube portion 21 of the tweeter 3, the woofer 2, and the sound guide tube 20 is disposed in this order from the top wall 12 side along the length L direction. The tweeter 3 and the woofer 2 are installed such that the center of each unit is arranged at the center of the front wall 11 in the width W direction. At this time, the tweeter 3 is disposed in a closed space independent of the woofer 2 and a diaphragm 10 described later. Although not shown, the tweeter 3 and the woofer 2 are connected to a signal line for inputting an electric signal for vibrating the tweeter 3 and the woofer 2, and a sound emission signal is input from an external audio reproduction device, a karaoke device, or the like. Is done.
The opening of the horizontal pipe portion 21 of the sound guide tube 20 has a width substantially equal to the width W of the front wall 11, the length in the length L direction is shorter than the width, and the woofer 2 and the front wall 11. It is set as long as possible from the bottom side end portion of the mechanism. The horizontal pipe portion 21 has a shape having a front cross section of the same shape as the opening portion 25 by the bottom wall 13, the side wall 15, and the horizontal intermediate wall 14 </ b> A of the housing 1, and extends from the front wall 11 to the back wall 4. It is formed in a shape extending linearly along the thickness D direction.

  The horizontal intermediate wall 14A is formed in a flat plate shape extending in parallel with the bottom wall 13 and is connected to the front wall 11 and has a shape extending from the back wall 4 to a position on the front wall 11 side by a predetermined distance. The position of the horizontal intermediate wall 14 </ b> A in the height direction is set to a position that is substantially in contact with the lowest end of the installation position of the woofer 2.

  A vertical intermediate wall 14B is installed at the end of the horizontal intermediate wall 14A on the back wall 4 side. The vertical intermediate wall 14B is formed in a flat plate shape extending in parallel to the front wall 11 and the back wall 4 and is connected to the top wall 12 and the horizontal intermediate wall 14A. The position in the thickness direction of the vertical intermediate wall 14B is set at a position separated from the innermost end of the woofer 2 by a distance that does not contact the woofer 2 even when the vibration plate 10 described later resonates and vibrates. Has been.

  The vertical intermediate wall 14B is formed with a substantially U-shaped slit 5 along the top wall 12 and the side wall 15 at a predetermined distance from the top wall 12 and at a predetermined distance from each side wall 15. A portion surrounded by the slit 5 and having one end integrated with the vertical intermediate wall 14B and the other end separated from the vertical intermediate wall 14B is the diaphragm 10. One end of the vertical intermediate wall 14B corresponds to the “fixed end” of the present invention.

  As described above, the diaphragm 10 is made of a flat plate member whose fixed end is the horizontal intermediate wall 14A side of the vertical intermediate wall 14B. At this time, the length in the height direction is longer than the length in the width direction. For example, the width: height is set to about 1: 1.2 to 2.0. This width-height ratio is an example of obtaining an effective effect, and may be other ratios depending on the specifications of the speaker device.

  The vertical intermediate wall 14 </ b> B including the diaphragm 10 formed in this way, the top wall 12, the back wall 4, and the side walls 15 form a vertical tube portion 22 of the sound guide tube 20. The vertical tube portion 22 has the same width as the horizontal tube portion 21, and the length (the distance in the length L direction in FIG. 1) is the length from the bottom wall 13 to the top wall 12. Further, the length of the vertical tube portion 22 (the distance in the direction of thickness D in FIG. 1) is set by the distance between the vertical intermediate wall 14B and the back wall 4. The vertical pipe portion 22 having the vertical direction as an axis and the horizontal pipe portion 21 having the horizontal direction as an axis form a sound guide tube 20 having a shape bent at a right angle in the middle. Note that the sound guide tube does not necessarily have a shape that bends at right angles, and may have a shape that does not hinder the flow of air or a shape that reduces air resistance. For example, it is possible to provide an oblique tube portion whose axes intersect at an obtuse angle with respect to both the vertical tube portion 22 and the horizontal tube portion 21, and connect the vertical wall 22 and the horizontal tube portion 21 with the oblique tube portion. good.

  The edge 6 is formed of an elastic body, is installed across the slit 5 between the diaphragm 10 and the vertical intermediate wall 14B, and deforms following the vibration of the diaphragm 10.

  By covering the slit 5 with the edge 6 in this way, the space of the sound guide tube 20 formed in the housing 1 by the horizontal intermediate wall 14A, the vertical intermediate wall 14B including the diaphragm 10, and the edge 6 is an opening. Only 25 is a closed space that opens to the outside. Further, since the slit 5 is hermetically sealed at the edge 6, the front wall 11, the woofer 2, the top wall 12, the side walls 15, the horizontal intermediate wall 14 </ b> A, the vertical intermediate wall 14 </ b> B including the diaphragm 10, and the edge 6 are hermetically sealed. A space 30 is formed.

  Next, a process of sound emission by the speaker device having such a configuration will be described with reference to FIG.

FIG. 2 is a diagram illustrating a sound emission process of the speaker device according to the present embodiment.
A sound output sound signal made up of an electrical signal is applied to the woofer 2 and the tweeter 3 from an external audio playback device, karaoke device or the like. At this time, the woofer 2 is applied with a sound release sound signal including a low sound range (f _L ) and a medium sound range (f _M ), and the tweeter 3 is provided with a sound output sound signal having only a high sound range (f _H ). Applied. The woofer 2 and the tweeter 3 reproduce the sound emission sound signal given to each, and emit the sound to the outside in the front direction of the speaker device (housing 1). That is, the cones of the woofer 2 and the tweeter 3 vibrate, and air on the outside side is vibrated from the cone to emit sound waves.

  Thus, when the woofer 2 reproduces the sound output sound signal, not only the sound wave is propagated to the outside of the housing 1, but also a pressure change corresponding to the sound wave is generated in the sealed space 30 of the housing 1. Arise.

  One end of the diaphragm 10 is completely fixed or integrally formed with the vertical intermediate wall 14B, and a material having a strength capable of supporting the weight of the diaphragm 10 and a spring property capable of withstanding vibration is used.

  When a pressure change occurs in the sealed space 30, the diaphragm 10 is deformed so as to be entirely like a leaf spring, but the deformation at the fixed end is always “0”, and continuously as the distance from the fixed end increases. Since deformation becomes large, the end opposite to the fixed end is referred to as a vibration end.

  Although the edge 6 is an elastic body, the spring property is set much smaller than the spring property of the diaphragm 10 because it is only for airtightness. For this reason, when a pressure change corresponding to the sound wave in the sealed space 30 occurs, resonance occurs due to the equivalent mass of the air spring and the cantilever diaphragm 10 determined by the volume of the sealed space 30, thereby amplifying a band near the resonance frequency. it can.

  The adjustment when changing the equivalent mass of the diaphragm 10 is realized by removing the back wall 4 installed in the housing 1 and providing the diaphragm 10 with a necessary weight.

A sound wave (Df _L : D is a constant larger than 1) whose low frequency range is amplified by the diaphragm 10 vibrates the air in the vertical pipe part 22, propagates in the vertical pipe part 22, and is opened from the vertical pipe part 22. Propagated to the horizontal tube portion 21 close to the portion 25. The sound wave propagated into the horizontal tube portion 21 is propagated from the vertical tube portion 22 side toward the opening portion 25 side. The sound wave that reaches the opening 25 is radiated from the opening 25 toward the front of the housing 1. Thereby, from the opening 25, the sound with the amplified low range is emitted. Thus, the low frequency range sound (Df _L ) amplified from the opening 25 is emitted, so that the low frequency range sound is amplified in the vicinity of the woofer 2 that reproduces the low frequency range and from the side facing the tweeter 3. And sound is emitted. As a result, the sound image concentrates and a stable orientation is obtained, so that the listener can listen to the sound emitted from the speaker device 1 without feeling uncomfortable.
That is, it is possible to realize a speaker device that reproduces powerful bass sounds and does not give a sense of discomfort to the listener.

  Further, since the diaphragm is installed not on the front wall but on the back wall side, it is not necessary to arrange a diaphragm that requires a larger area than the woofer on the front wall. Thereby, the shape of the speaker device viewed from the front is reduced. As a result, it is possible to realize a small and thin speaker device that reproduces powerful bass without any sense of incongruity. In addition, a sound wave that resonates the diaphragm is generated by installing the diaphragm on the back wall side where the speaker unit is not located, facing the front wall where the speaker unit such as the tweeter 3 or woofer 2 is located. A diaphragm that requires a larger area than the speaker unit (the woofer 2 in the above description) can be placed in a casing that is the same size as a speaker device that includes only the speaker unit.

  Further, at this time, since the vertical tube portion 22 and the horizontal tube portion 21 of the sound guide tube 20 have a width equivalent to the width of the housing 1, the diameter of the sound guide tube is reduced when propagating through the sound guide tube 20. Sound quality problems caused by the small size, that is, the narrow path for sound introduction, are prevented. Accordingly, sound obtained by accurately amplifying the low frequency range of the sound reproduced by the woofer 2 is emitted from the opening 25.

  Moreover, the vibration characteristics of the diaphragm installed inside the casing can be easily adjusted by installing the back wall so as to be removable from the casing.

Next, a speaker device according to a second embodiment will be described with reference to the drawings.
FIG. 3 is a front view and a top sectional view showing a schematic configuration of the speaker device of the present embodiment, in which (A) is a top sectional view and (B) is a front view. In the description of this embodiment, the longitudinal direction (lateral direction shown in FIG. 3) of the front wall 111 of the housing 100 is the length L0 direction, and the short direction (FIG. 3B of the front wall 111 of the housing 100). ) In the width W0 direction.
As shown in FIG. 3, in the speaker device of the present embodiment, the length D0 in the thickness direction (vertical direction in FIG. 3A) is longer than the length W0 in the width direction (vertical direction in FIG. 3B). And a casing 100 having a shape in which the length L0 in the length direction (lateral direction in FIGS. 3A and 3B) is significantly wider than the length W0 in the width direction.

  The speaker device of this embodiment includes a configuration in which a plurality of speaker units are arranged on a straight line at a predetermined interval on a front wall 111 of a housing 100.

  The plurality of speaker units includes a plurality of high-pitched speaker units 102 each reproducing a high-frequency range, a plurality of medium-tone speaker units 103 each reproducing a mid-range, and a plurality of low-pitched units each reproducing a low-frequency range. And a speaker unit 104.

  The plurality of speaker units are arranged on a linear arrangement axis (the one-dot chain line in FIG. 3) along the length L0 direction, and four loudspeaker speaker units 102 are arranged at the center in the arrangement direction. Two medium sound speaker units 103 are arranged on the arrangement axis so as to sandwich the group of high sound speaker units 102. Further, one low-frequency speaker unit 104 is arranged on each of the arrangement axes so as to sandwich the speaker unit group including the medium-sound speaker unit 103 and the high-frequency speaker unit 102.

  Sound guide tubes 200 each having an opening 250 that is short in the length L0 direction and long in the width W0 direction are formed at both ends of the casing 100 in the direction in which the arrangement axis extends (length L0 direction). . The sound guide tube 200 has a shape that is bent halfway when viewed from the top surface side and the bottom surface side, and extends in the thickness D0 direction from the opening 250 (front wall 111 side) toward the back wall 112 side. And a portion connected to the portion and extending from the both ends of the casing 100 in the length L0 direction by a predetermined length toward the central direction in the length L0 direction. Also in this embodiment, the shape of the sound guide tube 200 does not necessarily have to be bent at a right angle as shown in FIG. 3, and the shape that does not obstruct the air flow in the tube and the air resistance are low. Any shape is acceptable. The sound guide tube 200 is formed so that the cross section perpendicular to the extending direction of the sound guide tube 200 has a vertically long shape similar to that of the opening 250 in any part of the sound guide tube 200. Such a sound guide tube 200 is formed by the first vertical intermediate wall 115, the second vertical intermediate wall 116, the third vertical intermediate wall 117, the top wall, the bottom wall, the side wall 114, and the back wall 112. . The first vertical intermediate wall 115 has a shape extending in the direction of thickness D0 installed between the low-frequency speaker 104 in the housing 100 and the medium-sound speaker unit 105 adjacent thereto. The second vertical intermediate wall 116 is formed near the bass speaker unit 104 of the housing 100 and on the side wall 114 side in the length L0 direction of the housing 100. The third vertical intermediate wall 117 is formed in the vicinity of the bass speaker unit 104 and on the back wall 112 side in the thickness D0 direction of the housing 100.

The third vertical intermediate wall 117 has the same structure as that of the vertical intermediate wall 14B of the first embodiment, and includes a diaphragm 110 including a substantially U-shaped slit 107. At this time, the slit 107 is formed so that the fixed end of the diaphragm 110 is on the side wall 114 side. An edge 106 made of an elastic body is installed so as to cover the slit 107.
As a result, a sealed space 300 is formed behind the bass speaker 104 by the top wall, the bottom wall, the first vertical intermediate wall 115, the second vertical intermediate wall 116, and the third vertical intermediate wall 117 having the diaphragm 110. The Further, in the rear region of the loudspeaker unit 102 and the medium sound speaker unit 103 in the housing 1, a sealed space 310 is formed by the top wall, the bottom wall, the front wall 111, the back wall 112, and the first vertical intermediate wall 115. It is formed.

  In such a structure, when the low-pitched speaker unit 104 emits sound, the air in the sealed space 300 vibrates and the sound wave is propagated to the diaphragm 100. The diaphragm 100 is brought into a resonance state by this sound wave, and the amplified sound wave vibrates the air in the sound guide tube 200. Due to this vibration, the sound wave is propagated to the sound guide tube 200, propagates through the sound guide tube 200, and a sound in which a bass is amplified from the opening 250 in the front direction of the speaker device is emitted.

Even in such an array type speaker device, as in the first embodiment, it is easy to make a speaker device that reproduces powerful heavy bass and does not give a sense of incongruity to the listener while being thin and small. Can be realized with a simple configuration.
In the case of the present embodiment as well, as shown in FIG. 3, vibration such as attaching a weight to the diaphragm 110 by using a part of the back wall 112 facing the diaphragm 110 as a removable flat plate 140. The characteristics of the plate 110 can be easily adjusted.

  In the present embodiment, the speaker unit corresponding to the diaphragm 110 is a low-frequency speaker unit. However, not only the low-frequency range but also the speaker unit that can reproduce the mid-range and the entire range including the low-range can be reproduced. A speaker unit may be used. In such a case, even if the speaker unit includes not only the low sound range but also other sound ranges, the sound range in which the diaphragm resonates is mainly the low sound range, and the same effects as in the case of the above-described embodiment are achieved. Can do.

  In the present embodiment, four high-frequency speaker units, four medium-sound speaker units, and two low-frequency speaker units are shown. However, the speaker unit that reproduces each sound range corresponds to the specification of the apparatus. What is necessary is just to set suitably according to.

Next, a speaker device according to a third embodiment will be described with reference to the drawings.
FIG. 4 is a front view and a top cross-sectional view showing a schematic configuration of the speaker device of the present embodiment, where (A) is a front view and (B) is a top view cut along an AA plane shown in (A). It is sectional drawing, (C) is the top | upper surface sectional drawing cut | disconnected by the BB surface shown by (A). In the description of the present embodiment, the longitudinal direction (lateral direction shown in FIG. 4) of the front wall 111 of the housing 100 is the length L1 direction, and the short direction of the front wall 111 of the housing 100 (FIG. 4A). ) In the width W1 direction.

As shown in FIG. 4, the speaker device of this embodiment has a length in the thickness D1 direction (vertical direction in FIG. 4B) as in the speaker device shown in FIG. 3 (second embodiment). It is significantly shorter than the length in the width W1 direction (vertical direction in FIG. 4A), and the length in the length L1 direction (lateral direction in FIGS. 4A, 4B, and 4C) is A casing 100 ′ having a shape that is significantly wider than the length in the width W1 direction is provided.

  The speaker device of the present embodiment has a configuration in which a plurality of speaker units are arranged in a straight line along the length L1 direction at predetermined intervals on the front wall 111 (corresponding to the “first wall” of the present invention) of the housing 100. Prepare.

  The plurality of speaker units includes a plurality of high-pitched speaker units 102 each reproducing a high-frequency range, a plurality of medium-tone speaker units 103 each reproducing a mid-range, and a plurality of low-pitched units each reproducing a low-frequency range. The speaker unit 104 and a plurality of full-range speaker units 105 that reproduce the entire sound range reproduced by each speaker unit that reproduces these predetermined sound ranges.

  The plurality of speaker units are arranged along a linear arrangement axis (a chain line connecting AA in FIG. 4), and four high-frequency speaker units 102 are arranged at the center of the arrangement direction which is the length L1 direction. Has been. One medium sound speaker unit 103 is arranged on each of the arrangement axes so as to sandwich the group of high sound speaker units 102. Further, one low-frequency speaker unit 104 is arranged on each of the arrangement axes so as to sandwich a speaker unit group including the middle-tone speaker unit 103 and the high-frequency speaker unit 102. Furthermore, the entire sound range speaker unit 105 is arranged on each of the arrangement axes so as to sandwich a speaker unit group composed of the low-frequency speaker unit 104, the medium-frequency speaker unit 103, and the high-frequency speaker unit 102.

  In addition, a tweeter 106 that is a high-frequency speaker is disposed between the low-frequency speaker 104 and the full-range speaker unit 105 at both ends, at a position on the top surface 111 side when viewed from the front. At this time, the space behind the tweeter 106 has a structure in which a space independent of other spaces in the housing 100 ′ is formed.

  Sound guide tubes 200 ′ having openings 250 having shapes that are long in the width W <b> 1 direction and short in the length L <b> 1 direction are formed at both ends of the casing 100 ′ in the direction in which the arrangement axis extends. The sound guide tube 200 ′ is bent in the middle when viewed from the top surface side and the bottom surface side, and corresponds to the back wall 112 (the “second wall” of the present invention) from the opening 250 ′ (front wall 111 side). ) Side and a portion extending in the thickness D1 direction, and a portion connected to the portion and extending at a predetermined length from both ends in the width direction of the casing 100 ′ toward the center in the length L1 direction. In this embodiment as well, the shape of the sound guide tube 200 ′ does not necessarily have to be bent at a right angle as shown in FIG. 4. The shape does not hinder the flow of air in the tube, and the air resistance is low. Any shape can be used. The sound guide tube 200 ′ is formed so that the cross section perpendicular to the extending direction of the sound guide tube 200 ′ has a vertically long shape similar to that of the opening 250 in any part of the sound guide tube 200 ′. ing. The sound guide tube 200 ′ is formed by the first vertical intermediate wall 115, the second vertical intermediate wall 116, the third vertical intermediate wall 117, the top wall, the bottom wall, the side wall 114, and the back wall 112. Yes.

  The first vertical intermediate wall 115 has a shape extending in the direction of the thickness D <b> 1 installed between the bass speaker 104 in the housing 100 and the tweeter 106 adjacent thereto. The second vertical intermediate wall 116 is formed in the vicinity of the full-range speaker unit 105 of the casing 100 ′ and on the side wall 114 side in the length L <b> 1 direction of the casing 100 ′. The third vertical intermediate wall 117 is formed in the vicinity of the tweeter 106 and on the back wall 112 side in the thickness D1 direction of the housing 100 ′. The third vertical intermediate wall 117 is formed with a length including at least the arrangement position of the full-range speaker unit 105 with respect to the length L1 direction of the casing 100 '.

The third vertical intermediate wall 117 has the same structure as the third vertical intermediate wall 117 of the second embodiment, and includes a diaphragm 110 including a substantially U-shaped slit 107. At this time, the slit 107 is formed so that the fixed end of the diaphragm 110 is on the side wall 114 side. The edge 120 made of an elastic body is installed so as to cover the slit 107. At this time, the diaphragm 110 is formed so that the position of the slit 107 on the vibration end side corresponds to the position of the tweeter 106. Thereby, the length between the fixed end and the vibration end of the diaphragm 110 can be set to be about 1.2 to 1.5 times the diameter of the whole sound range speaker unit 105.
In this way, by forming three vertical intermediate walls at both ends of the casing 100 ′, a sealed space 300 is formed behind the full-range speaker unit 105, and a high-frequency speaker unit 102, a medium-sound speaker unit 103, A sealed space 310 is formed behind the bass speaker 104.

  In such a structure, when the whole range speaker unit 105 emits sound, the air in the sealed space 300 vibrates and the sound wave is propagated to the diaphragm 110. The diaphragm 110 is brought into a resonance state by this sound wave, and the amplified sound wave vibrates the air in the sound guide tube 200 ′. Due to this vibration, the sound wave is propagated to the sound guide tube 200 ′, propagates through the sound guide tube 200 ′, and the sound in which the bass is amplified from the opening 250 in the front direction of the speaker device is emitted.

Even in the array type speaker device including such a full-range speaker unit, similar to the second embodiment described above, it reproduces a powerful deep bass and is uncomfortable to the listener while being thin and small. Can be realized with an easy configuration.
In the case of the present embodiment as well, as shown in FIG. 4, vibration such as attaching a weight to the diaphragm 110 by making a part of the back wall 112 facing the diaphragm 110 a detachable flat plate 140. The characteristics of the plate 110 can be easily adjusted.

  Further, in the present embodiment, the case where there are four high-frequency speaker units, two mid-range speaker units, two low-frequency speaker units, and two full-range speaker units is shown, but each sound range is reproduced. What is necessary is just to set a speaker unit suitably according to the specification of an apparatus.

It is a trihedral view of the speaker device according to the first embodiment. It is a figure explaining the sound emission process of the speaker apparatus of 1st Embodiment. It is the front view and top surface sectional drawing which show schematic structure of the speaker apparatus of 2nd Embodiment. It is the front view and top surface sectional drawing which show schematic structure of the speaker apparatus of 3rd Embodiment.

Explanation of symbols

1-housing, 2-woofer, 3-tweeter, 4-back wall (second wall), 5-slit, 6-edge, 10-diaphragm, 11-front wall (first wall), 12-top wall 13-bottom wall, 14A-horizontal intermediate wall, 14B-vertical intermediate wall, 15-side wall, 20-sound guide tube, 21-horizontal tube portion, 22-vertical tube portion, 30-sealed space 100, 100'- Housing, 102—Sound speaker unit for high sound, 103—Speaker unit for medium sound, 104—Speaker unit for low sound, 106—tweeter, 110—Vibration plate 111—Front wall, 112—Back wall, 114—Side wall, 115, 116, 117-vertical intermediate wall, 140-flat plate material, 200-sound guide tube, 300, 310-sealed space

Claims (3)

A substantially rectangular parallelepiped housing having a first wall and a second wall facing each other, and a speaker unit disposed on the first wall,
The speaker device has a thickness that is an installation interval between the first wall and the second wall of the housing shorter than the length and width of the first wall and the second wall,
The first wall is disposed along the second wall between the second wall and the speaker unit, and has a fixed end fixed to the housing, and is emitted from the speaker unit by sound emitted from the speaker unit. A vibration member that resonates and vibrates with the direction connecting the second wall as a main vibration direction;
An opening is formed in the first wall, and a sound guide tube that guides the sound wave generated by the vibrating member to the opening;
With
The plurality of speaker units are arranged in the order of the range of sound to be reproduced,
The opening of the sound guide tube has a wide shape having a width that substantially matches the width of the first wall, and sandwiches a speaker unit that reproduces the low sound range, and a speaker unit that reproduces only a sound range higher than the low sound range. A speaker device installed on the opposite side. The speaker unit is composed of a plurality of single speaker units whose sound ranges to be reproduced are different except for the end of the sound range,
The arrangement pattern is a single speaker unit that reproduces the middle range and the low range so that the sound range that is reproduced in order toward both ends of the array is lowered centering on the single speaker unit that reproduces the high range. Yes,
The speaker device according to claim 1, wherein the sound guide tube is disposed on both ends of a single speaker unit that reproduces the low sound range. The speaker unit is a full-range speaker unit that reproduces the entire sound range that is reproduced by a plurality of single-speaker units whose sound ranges to be reproduced differ from each other except for the end of the sound range and the plurality of single-speaker units that have different sound ranges to be reproduced. And comprising
The pattern of the arrangement is such that a single speaker unit that reproduces the middle sound range and the low sound range is arranged so that the sound range that is reproduced in order toward both ends of the array is lowered centering on the single speaker unit that reproduces the high sound range, and the low The full-range speaker unit is arranged on both ends of a single speaker unit that reproduces a range,
The speaker device according to claim 1, wherein the sound guide tube is disposed further on both ends of the full-range speaker unit.

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