JP2008148258A - Speaker instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a speaker instrument ensuring high sound frequency reproduction capability and allowing the directivity of a high sound frequency speaker unit to coincide with that of a low sound frequency speaker unit. <P>SOLUTION: A plurality of tweeters 22 for reproducing a high-pitched tone range are installed around a wafer 21 for reproducing middle- and low-pitched tone ranges. The circumcenter position of a triangle (polygon) formed by connecting the center positions of respective tweeters 22 for reproducing a high-pitched tone range and the center position of the wafer 21 reproducing the middle- and low-pitched tone ranges are installed overlappingly. As a whole, the speaker instrument 1 can be regarded as one speaker unit that uses the circumcenter position G1 as a sound source position and has strong directivity, and the circumcenter position G1 overlaps with a center position s4 of the wafer 21, thus allowing the directivity of the high-pitch tone range to coincide with that of the low-pitch tone range in a listening sense. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a speaker device that is used by being installed on a ceiling or a wall.

  The speaker device is currently used everywhere, and as an example, the speaker device may be installed in a small space such as a karaoke box. When installing in a karaoke box, in order to efficiently use the floor area, the speaker device is often installed on a ceiling or hung on a wall.

  As a speaker device of a type suspended from the ceiling, for example, as shown in Patent Document 1, a mounting bracket separate from the speaker device is installed on the ceiling, and the speaker device is held by the mounting bracket.

On the other hand, a speaker device used for karaoke requires a reproduction capability from high to low. The speaker unit of the speaker device is good at high frequency reproduction as the aperture is small, and is good at low frequency reproduction as the aperture is large. Therefore, a speaker device (two-way speaker device) provided with a plurality of low-frequency speaker units and high-frequency speaker units is often used. For this reason, a speaker device that reproduces sufficient sound quality from high to low sounds has a relatively large shape.
JP-A-5-331951

  However, if a large-sized speaker device is hung on the ceiling in a narrow space such as a karaoke box, a feeling of pressure is given to the karaoke user. On the other hand, if the shape of the speaker device is reduced in size and thickness, the low-frequency reproduction capability is lowered, and a powerful deep bass cannot be provided to the user.

  On the other hand, a speaker device including a coaxial speaker unit in which a low-frequency speaker unit and a high-frequency speaker unit are integrally formed is also considered as a speaker device that can be relatively miniaturized while ensuring sound quality from high to low frequencies. It is done. In the coaxial speaker unit, the directivity in the high frequency and the low frequency are the same, and it is possible to hear a sound with no sense of incongruity compared to the 2-way speaker. However, in principle, only one such coaxial speaker unit can have a high frequency speaker unit (with the same aperture), and the high frequency reproduction capability is not sufficient (particularly, the high frequency directivity becomes weak). There were many.

  An object of the present invention is to provide a speaker device in which the directivity of a high-frequency speaker unit and a low-frequency speaker unit are matched while sufficiently ensuring high-frequency reproduction capability.

  The speaker device according to the present invention includes a first speaker unit and a plurality of second speaker units having a smaller diameter than the first speaker unit, and the plurality of second speaker units includes the first speaker unit. The first speaker unit and the plurality of second speaker units are arranged at the center of the plurality of second speaker units as viewed from the sound emitting surface. The geometrical center position of the polygon formed by connecting the positions and the center position of the first speaker unit are arranged to overlap each other.

  In this configuration, a plurality of second speaker units (for high frequencies) having a small diameter are arranged around the first speaker unit (for middle and low frequencies). The geometric center position (for example, the outer center position) of the polygon (triangular if there are three speaker units) formed by connecting the center positions of the second speaker unit and the center position of the first speaker unit overlap. ing. The sound emitted from each of the plurality of second speaker units is strengthened by synthesis, and has strong directivity in the direction of the sound emitting surface starting from the polygonal outer center position. Therefore, the plurality of second speaker units can be regarded as a single speaker unit having strong directivity with the outer center position as the sound source position. Therefore, the sound source position of the low-frequency speaker unit and the sound source position of the high-frequency speaker unit are matched while ensuring sufficient high-frequency playback capability, and the audible orientation of the high and low frequencies The gender will match.

  Further, the present invention further includes a first surface on which the first speaker unit and the plurality of second speaker units are installed, and a shape viewed from the side in at least one direction with respect to the first surface. And a speaker enclosure having a side surface that narrows along the depth direction of the speaker unit from the first surface.

  In this configuration, since the speaker enclosure has a shape that gradually decreases in the depth direction from the installation surface of the speaker unit, the speaker enclosure is formed smaller than the case where the speaker enclosure is a rectangular parallelepiped. By disposing the speaker device having such a structure on the ceiling surface and the wall surface, and also on the corner where the ceiling surface and the wall surface intersect, the user feels thinner and smaller than the conventional rectangular parallelepiped speaker device.

  Further, the present invention is characterized in that the speaker enclosure has a substantially tetrahedral shape, and one of the four surfaces of the substantially tetrahedral shape is the first surface.

  In this configuration, since the speaker enclosure is a substantially tetrahedron, the apex portion facing the first surface on which the speaker unit is disposed can be installed according to the angle at which the ceiling surface and the two wall surfaces intersect. And a flat bass reinforcement part can be arrange | positioned along a ceiling surface or a wall surface. The substantially tetrahedron shape includes a triangular pyramid shape, and includes a shape obtained by cutting out any vertex of the triangular pyramid.

  Further, the present invention is further formed in a direction protruding from the first surface along any side surface of the speaker enclosure, and enhances and emits the low frequency sound propagated from the internal space of the speaker enclosure. It is characterized by comprising a flat plate-like bass enhancement section that sounds.

  In this configuration, the sound reproduced by the speaker unit is emitted outward from the first surface of the speaker enclosure and is propagated to the bass enhancement unit through the speaker enclosure. The bass enhancement unit enhances and emits the bass range of the propagated speaker unit reproduction sound. Thereby, the voice which has a heavy bass is provided to the user who exists in the room where the speaker apparatus was installed. Moreover, since the bass enhancement part is flat, it is formed thinner than when it is a rectangular parallelepiped.

  Further, according to the present invention, the flat bass enhancing portion is exposed in a region in the same direction as the first surface of the speaker enclosure, and has at least the same width as the first surface of the speaker enclosure. A swingable diaphragm formed on the main surface and having one end fixed to the first main surface is provided.

  In this configuration, the sound propagated to the bass enhancement unit is reinforced with bass (low frequency) according to the specification of the diaphragm by resonance vibration of the diaphragm. At this time, since the diaphragm is formed on the first main surface having a certain area, it is possible to enhance the low-frequency sound at a predetermined level or more even if the diaphragm is thin.

  According to the present invention, the directivity with the low-frequency speaker unit matches with the relatively high-frequency speaker unit having strong directivity.

  A speaker device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an external view of the speaker device 1 according to the first embodiment. 1A is a plan view of the speaker device 1, FIG. 1B is a side view, FIG. 1C is a side sectional view, and FIG. 1D is a rear view.

  As shown in FIG. 1, the speaker device 1 according to the present embodiment includes a speaker enclosure unit 13 formed of a tetrahedral (triangular pyramid) housing. The speaker enclosure unit 13 is composed of four triangular surfaces, and one of the four triangular surfaces is a speaker unit installation surface 131, and this installation surface (baffle surface) has one woofer 21 that reproduces a mid-low range. And three tweeters 22 for reproducing the high sound range are arranged. The speaker unit installation surface 131 corresponds to the “first surface of the speaker enclosure” of the present invention. The three triangular surfaces excluding the speaker unit installation surface 131 are an upper back surface 132, a right back surface 133, and a left back surface 134, and the entire surface is a rigid wall.

  In the speaker enclosure unit 13, the solid angle formed by the upper back surface 132, the right back surface 133, and the left back surface 134 has a ceiling surface 101 (see FIG. 2B) on which the speaker device is disposed and two wall surfaces 102A and 102B. (See FIG. 2B) is set to an angle that substantially coincides with the solid angle of the corner portion. The solid angle formed by each of the upper back surface 132, the right back surface 133, and the left back surface 134 and the speaker unit installation surface 131 is determined based on the cone shape of the woofer 21 installed on the speaker unit installation surface 131. The space between the woofer 21 and the tweeter 22 in the part 13 and the wall surfaces 131 to 134 is set to be small.

Next, the positional relationship between the woofer 21 and the three tweeters 22 will be described with reference to FIG. FIG. 2A is a diagram of the speaker device viewed from the front of the speaker unit installation surface 131.
The installation center position s4 of the woofer 21 is overlapped with the geometric center position (external center position in this example) of the speaker unit installation surface 131 which is a triangular surface. The three tweeters 22 are installed so as to surround the woofer 21 and are installed at positions close to the apexes of the triangular plane. Here, each tweeter 22 has an outer center position G1 of a triangle formed by connecting the respective installation center positions s1 to s3 (a two-dot broken line in FIG. 2A) and an installation center position s4 of the woofer 21. It is installed so that it may overlap.

  As described above, the speaker device 1 is formed by connecting a plurality of tweeters 22 that reproduce the high sound range around the woofer 21 that reproduces the middle and low sound range, and connecting the center positions of the tweeters 22 that reproduce the high sound range. The triangular (polygonal) outer center position and the center position of the woofer 21 that reproduces the mid-low range are installed so as to overlap.

  The three tweeters 22 emit the same sound at the same timing. The sound emitted from each tweeter 22 propagates radially (circular). The sound emitted from each tweeter 22 is strengthened by synthesizing components propagating forward. Therefore, the component toward the front is strengthened by synthesis, and can be regarded as a single speaker unit having strong directivity with the outer-center position G1 as the sound source position when viewed as the speaker device 1 as a whole. Since the outer center position G1 and the center position s4 of the woofer 21 overlap, the sound source position of the low frequency woofer 21 and the sound source position of the high frequency tweeter 22 coincide with each other in terms of the high frequency and low frequency audibility. The directivity will match.

  The number of tweeters 22 is not limited to three. For example, as shown in FIG. 6, four tweeters 22 may be installed around the woofer 21. In this case, it suffices if the quadrangle (polygonal) outer center position formed by connecting the center positions of the tweeters 22 and the center position of the woofer 21 for reproducing the mid-low range are overlapped.

  Next, the arrangement of the speaker device will be described. FIG. 2B is a diagram illustrating an example in which a speaker device is installed in a karaoke box.

  The karaoke box has a ceiling surface 101, a side wall 102A, a side wall 102B, and a floor (not shown). A speaker device having the above-described structure is installed at a corner 151 where the ceiling surface 101 of the karaoke box intersects with the side wall 102A and the side wall 102B. The speaker device is arranged so that the connecting portion between the upper and lower back surfaces 132 and the left and right rear surfaces 133 and 134 of the speaker enclosure portion 13 substantially contacts the corner portion 151. The speaker device is installed on the ceiling surface 101 with a mounting jig.

  By using such an installation structure, the speaker device can be set back to the corner of the karaoke box ceiling. As a result, it is possible to eliminate the feeling of pressure as in the conventional method of hanging from the ceiling.

  Note that the shape of the enclosure of the speaker device may be a shape in which any apex of the triangular pyramid is cut out as shown in FIG. Moreover, it is not limited to a triangular pyramid. For example, a triangular prism shape may be used. In this case, any one of the three side surfaces of the triangular prism may be used as the speaker unit installation surface, and the other two surfaces may be installed on the ceiling surface and the side wall of the karaoke box. In this case, since the speaker unit installation surface is rectangular, it is desirable to install four tweeters. Further, a rectangular parallelepiped shape which is a general shape of an enclosure is also included in the technical scope of the present invention. Four tweeters may be installed with any one of the six surfaces of the rectangular parallelepiped as the speaker unit installation surface.

  Next, FIG. 3 is an external view of the speaker device 2 according to the second embodiment. 3A is a plan view of the speaker device 1, FIG. 3B is a side view, FIG. 3C is a side sectional view, and FIG. 3D is a rear view.

  In the speaker device 2 of the second embodiment, a speaker enclosure portion 13 formed of a triangular pyramid-shaped housing and a bass enhancement portion 14 formed of a flat-plate-shaped housing having a trapezoidal shape in plan view are integrally formed. Become. The speaker enclosure unit 13 is composed of four triangular surfaces as in the first embodiment, and one of the four triangular surfaces is a connection surface 132. Since this surface is largely open, almost no wall is formed. Without being provided, it is connected to the bass enhancement unit 14. One of the other three triangular surfaces is a speaker unit installation surface 131. On this installation surface (baffle surface), there is one woofer 21 that reproduces the mid-low range, and three that reproduces the high range. A tweeter 22 is arranged. The two triangular surfaces excluding the connection surface 132 and the speaker unit installation surface 131 are a right back surface 133 and a left back surface 134, and the entire surface is a rigid wall.

  In the speaker enclosure unit 13, the solid angle formed by the connection surface 132, the right back surface 133, and the left back surface 134 includes a ceiling surface 101 (see FIG. 5) on which the speaker device 10 is disposed and two wall surfaces 102A and 102B (see FIG. 5). ) Is set to an angle that substantially coincides with the solid angle of the corner portion. The solid angle formed between each of the connection surface 132, the right back surface 133, and the left back surface 134 and the speaker unit installation surface 131 is determined based on the cone shape of the woofer 21 installed on the speaker unit installation surface 131. The space between the woofer 21 and the tweeter 22 in the part 13 and the wall surfaces 131 to 134 is set to be small.

  The bass enhancement unit 14 includes a first main surface 141 having a shape that further extends outward from an intersecting side where the connection surface 132 of the speaker enclosure unit 13 intersects the speaker unit installation surface 131, and a second main surface 141 that faces the first main surface 141. A main surface 142. The first main surface 141 is formed in a trapezoidal shape in plan view so that the width W12 at the front end side surface 143 is larger than the width W11 at the intersecting side. Thereby, even if the bass enhancing portion 14 is thin, the internal volume can be increased, and the ceiling surface 101 and the side walls 102A and 102B can be formed from the corners of the room which are the intersections of the ceiling surface 101 and the side walls 102A and 102B. It becomes the shape which spreads along.

  The first main surface 141 has one end integrated with the first main surface 141 and the other three ends separated from the first main surface 141 by the slits 320, and the diaphragm 310 having a trapezoidal shape in plan view. Is formed. An edge 330 made of an elastic body is provided on the inner side of the bass enhancement unit 14 corresponding to the slit 320. By this edge 330, the inside and the outside of the bass enhancement section 14 are isolated.

The second main surface 142 is formed longer than the first main surface 141, and is formed in a triangular shape extending from the intersecting side to the intersection of the left and right rear surfaces 133, 134 of the speaker enclosure portion 13 toward the speaker enclosure portion 13 side. .
The first main surface 141 and the second main surface 142 are disposed at the position of the thickness D10 by the front end side surface 143 and the two extending side surfaces 144, and the casing of the bass enhancing portion 14 is formed by these wall surfaces. ing. Here, the front end side surface 143 is a surface that has a shape extending in the width direction of the bass enhancement portion 14 and the speaker enclosure portion 13 and is formed on the side facing the speaker enclosure portion 13 with respect to the bass enhancement portion 14. Further, the extending direction side surface 144 is a surface having a shape extending in the extending direction of the bass enhancing portion 14.

  Here, each dimension element constituting the bass enhancing portion 14 is L10, W11, W12 >> D10, that is, the dimension in the length direction in the distraction direction and the dimension in the width direction are significantly longer than the dimension in the thickness direction. For example, the length L10, the width W11, and W12 are 300 mm or more, while the thickness D10 is suppressed to 40 mm. Thus, the bass enhancement part 14 is formed in a thin flat plate shape.

  With the configuration as described above, the speaker enclosure 13 and the bass booster 14 are integrally formed, so that the internal space formed by the walls of the speaker enclosure 13 and the walls of the bass booster 14 is externally provided. It becomes a closed space.

  Next, the sound emission process of the speaker device 2 will be described. FIG. 4 is a side cross-sectional view showing the sound emission process of the speaker device 2.

  When an audio signal is applied to the woofer 21 and the tweeter 22, the cones of the woofer 21 and the tweeter 22 vibrate and sound is emitted from the speaker unit installation surface 131 to the outside. At this time, the woofer 21 mainly emits the sound 51 in the middle and low range, and the tweeter 22 emits the sound in the high range (not shown).

  Inside the speaker enclosure 13, the cone of the woofer 21 vibrates and sound is emitted to the outside, and at the same time, an internal sound 60 is generated. The internal sound 60 is propagated from the speaker enclosure unit 13 into the bass enhancement unit 14. Since the inside of the speaker device 2 is a sealed space, the diaphragm 310 of the bass enhancement unit 14 is vibrated by the internal sound 60. At this time, the diaphragm 310 resonates and vibrates in the low sound region of the internal sound 60, and enhances the sound in the low sound region. The sound 52 with the enhanced bass sound is emitted outward from the first main surface 141 that is the installation surface of the diaphragm 310. Although not shown, each tweeter 22 is installed in an acoustically independent sealed space in the speaker enclosure 13, and the internal sound 60 of the woofer 21 does not propagate to the tweeter 22.

  Next, the arrangement of the speaker device 2 will be described. FIG. 5 is a diagram showing a karaoke box in which the speaker device 2 is installed.

  The karaoke box has the same structure as that of the first embodiment, and has a ceiling surface 101, side walls 102A and 102B, and a floor (not shown). A speaker device 2 having the above-described structure is installed at a corner 151 where the ceiling surface 101 of the karaoke box intersects with the side walls 102A and 102B. The speaker device 2 is arranged such that a connection portion between the second main surface 142 of the bass enhancement portion 14 and the left and right rear surfaces 133 and 134 of the speaker enclosure portion 13 substantially contacts the corner portion 151. The speaker device 10 is installed on the ceiling surface 101 by a mounting jig (not shown).

By using such an installation structure, the speaker device 2 can be set back to the corner of the ceiling of the karaoke box. As a result, it is possible to eliminate the feeling of pressure as in the conventional method of hanging from the ceiling. Furthermore, the speaker device 2 of the present embodiment includes a speaker enclosure part 13 having a certain thickness and a thin bass enhancing part 14, but the thick speaker enclosure part 13 is arranged at the ceiling side corner of the room, so that a thin bass sound is obtained. Since the reinforcement part 14 is arrange | positioned at the center side of a room, a feeling of pressure can be eliminated further. Moreover, since the bass enhancing part 14 has a thin plate shape, it can be embedded in the ceiling surface.
As a result, it is possible to realize a speaker device that reproduces powerful heavy bass and does not give the user a feeling of pressure with a relatively simple structure.

  In the second embodiment, an example in which the shape of the speaker enclosure portion is a triangular pyramid has been shown, but other shapes may be used. For example, a triangular prism shape may be used. In the case of the triangular prism shape, one of the three rectangular surfaces on the side surface may be used as a speaker unit installation surface, and one of the other two rectangular surfaces may be used as an installation surface for the bass enhancement unit. In this case, the other remaining surface is connected to the wall surface of the karaoke box. Further, in this case, since the speaker device is installed not at the corner of the room but at the intersection of the ceiling and the side wall, the bass enhancement unit may be rectangular in plan view.

1 is an external view of a speaker device 1 according to a first embodiment. It is the figure which looked at the speaker apparatus 1 from the front of the speaker unit installation surface 131, and the figure which shows the karaoke box which installed the speaker apparatus 1. FIG. It is an external view of the speaker apparatus 1 which concerns on 2nd Embodiment. It is side surface sectional drawing explaining the sound emission process of the speaker apparatus 2 of 2nd Embodiment. It is a figure which shows the karaoke box which installed the speaker apparatus 2 of 2nd Embodiment. FIG. 6 is an external view of a speaker device of an example in which four tweeters 22 are installed around the woofer 21.

Explanation of symbols

1-speaker device 13-speaker enclosure 21-woofer 22-tweeter

Claims (5)

A first speaker unit;
A plurality of second speaker units having a smaller aperture than the first speaker unit,
The plurality of second speaker units are installed with a common sound emitting surface around the first speaker unit,
The first speaker unit and the plurality of second speaker units are polygonal geometric center positions connecting the center positions of the plurality of second speaker units, as viewed from the sound emission surface, The speaker apparatus arrange | positioned in the position which the center position of a said 1st speaker unit overlaps.   The first surface on which the first speaker unit and the plurality of second speaker units are installed, and the shape of the first surface as viewed from the side in at least one direction are formed from the first surface to the speaker unit. The speaker device according to claim 1, further comprising a speaker enclosure having a side surface that narrows along a depth direction.   The speaker device according to claim 2, wherein the speaker enclosure has a substantially tetrahedral shape, and one of the four surfaces of the substantially tetrahedral shape is the first surface.   A flat bass booster that is formed in a direction projecting from the first surface along any side surface of the speaker enclosure and that boosts and emits low-frequency sounds propagated from the internal space of the speaker enclosure. The speaker device according to claim 2, further comprising:   The flat bass enhancing portion is exposed to a region in the same direction as the first surface of the speaker enclosure, and is formed on a first main surface having at least the same width as the first surface of the speaker enclosure, and has one end 5. The speaker device according to claim 2, further comprising a swingable diaphragm fixed to the first main surface.

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