JP2009124593A - Front panel for array speaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve a firm protective effect as compared with before, and to improve the characteristic performance of an array speaker providing a high-quality sound. <P>SOLUTION: Front panels 22 are used as baffle plates for a speaker modules composing the array speaker. The front panel 22 has: a through-hole 30 for a woofer 24, a through-hole 32 for a tweeter 26, and a through-hole 36 for a bass-reflex port 28. Peripheries 38, 44, 48 of the respective through-holes 30, 32, 36 project frontward, and compose a grid-like framework 51 with long reinforcement sections 40, 42, 50, thus achieving a protective effect for protecting the woofer 24, the tweeter 26, and the bass-reflex port 28 from a ball used for a ball game especially in a gymnasium use. The inner-periphery walls of the respective peripheries 38, 44, 48 are formed in a horn shape. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a front panel for an array speaker, and more particularly to a front panel that is attached to a front portion of each of a plurality of speaker modules of an array speaker having a plurality of speaker modules.

  As a speaker used in a place that provides high-quality sound such as a concert hall, there is an array speaker disclosed in Non-Patent Document 1, for example. According to this array speaker, a plurality of, for example, four speaker units having a low-frequency cone-type woofer and a high-frequency dome-shaped tweeter are arranged. By arranging a plurality of speaker units in this way, a low-frequency linear sound source consisting of a woofer row and a high-frequency linear sound source consisting of a tweeter row are virtually formed. Directivity control over a wide band from high to high is possible, and the influence of unintentional sound diffusion and reflection by walls and the like is suppressed, thereby providing high-quality sound.

“Compact Array Speaker” catalog, catalog no. B-131 OK10, March 2005

  By the way, in recent years, there has been an increasing demand for providing high-quality sound even in places where the acoustic environment is never good, such as in gymnasiums, and array speakers are extremely effective in meeting such demands. Is. However, for example, in gymnasiums, ball games such as volleyball and basketball are naturally performed. Therefore, in gymnasium applications where such ball games are performed, some measures, in other words, ball protection measures, are required to protect the array speakers from the balls. become. In a conventional array speaker, as a measure against this ball-proofing, a punching net (a metal having a thickness of about 1.6 [mm] formed by punching a large number of through-holes by pressing and bending appropriately) However, the punching net alone is not sufficient as a ball-proofing measure due to inconvenience such as deformation when the ball hits the net.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to further improve the performance unique to an array speaker, such as providing a high-quality sound while realizing a more robust anti-ball measure than conventional ones.

  In order to achieve this object, the present invention provides a panel that is attached to the front portion of each of a plurality of speaker modules of an array speaker having a plurality of speaker modules, and each speaker module includes a first speaker unit. It is assumed that it has. Under this premise, the first edge is provided so as to surround the periphery of the front portion of the first speaker unit and project forward from the front portion of the first speaker unit, which is the sound output direction. And one or more reinforcing portions that are provided so as to span between the inner peripheral walls of the first edge and whose front side edge is aligned with the tip of the first edge. Furthermore, the inner peripheral wall of the first edge portion is formed in a generally horn shape so as to gradually spread outward as it goes forward.

  In other words, in the present invention, the first edge portion is provided so as to surround the periphery of the front portion of the first speaker unit. And this 1st edge part protrudes toward the front rather than the front part of the 1st speaker unit. Further, one or more reinforcing portions are provided so as to span between the inner peripheral walls of the first edge portion. And the side edge of the front side of this reinforcement part is aligned with the front-end | tip of a 1st edge part, and is said to be flush (slitch). Therefore, the first speaker unit can be protected from external force by the first edge portion and the reinforcing portion. For example, in a gymnasium application, a ball-proofing measure is achieved to protect the first speaker unit from the ball. . Moreover, since the inner peripheral wall of the first edge portion is formed in a generally horn shape so as to gradually spread outward as it goes forward, the output characteristics of the first speaker unit, such as output efficiency, directivity, and radiation impedance Consistency and the like are improved.

  In the present invention, it is desirable that the reinforcing portion is a substantially long member provided in a state where the main surface is aligned in the forward direction (in other words, the front-rear direction). By comprising in this way, the mechanical strength of the reinforcement part with respect to external force improves.

  Each speaker module may include a second speaker unit having a smaller diameter than the first speaker unit. In this case, it further includes a second edge portion that surrounds the periphery of the front portion of the second speaker unit and is provided so as to protrude forward from the front portion of the second speaker unit. The inner peripheral wall of the second edge is formed in a generally horn shape so as to gradually spread outward as it goes forward, and the tip of the second edge is aligned with the tip of the first edge. .

  If it does in this way, also about the 2nd speaker unit, a ball-proof measure is realized by the 2nd edge. And since the 2nd edge part is formed in the outline horn shape so that it may spread outside gradually as it goes ahead, the output characteristic of the said 2nd speaker unit improves.

  Thus, when each speaker module has a 2nd speaker unit, there exists a tweeter for high regions as the said 2nd speaker unit, for example. On the other hand, examples of the first speaker unit include a low-frequency woofer and a mid-low frequency squawker.

  Furthermore, each speaker module may have a plurality of second speaker units arranged in one row. In this case, it is desirable that the second edge between the two second speaker units adjacent to each other is continuous with the reinforcing portion. If it does in this way, since the 2nd edge and reinforcement part between two adjacent 2nd speaker units will continue, design nature improves.

  Each speaker module may be of a bass reflex type having a bass reflex port. In this case, it further includes a third edge portion that surrounds the periphery of the front portion of the bass reflex port and is provided so as to protrude forward from the front portion of the bass reflex port. And the front-end | tip of this 3rd edge shall be aligned with the front-end | tip of a 1st edge.

  If it does in this way, also about a bass reflex port, a ball-proof measure is realized by the 3rd edge. Note that the third edge portion may be formed in a substantially horn shape so as to gradually spread outward as it goes forward. As a result, wind noise in the vicinity of the opening of the bass reflex port is suppressed, and air circulation efficiency is improved. This also contributes to improvement of output characteristics of the entire speaker module (array speaker).

  In addition, when the aperture of the bass reflex port is relatively large, for example, when it is larger than the aperture of the second speaker unit, the bass reflex port may be provided with the same reinforcing portion as described above. That is, you may provide the 1 or more reinforcement part provided so that it might span between the internal peripheral walls of a 3rd edge part, and the side edge of the front side was aligned with the front-end | tip of the said 3rd edge part. And this reinforcement part may also be a substantially elongate member.

  Furthermore, you may provide net members, such as a punching net, so that the front part of a 1st speaker unit may be covered in the state which contact | connected the front edge of the 1st edge part and the side edge of the reinforcement part at least. In this case, since the net member is uniformly supported by the tip of the first edge portion and the side edge of the reinforcing portion which are in a flush state, the net member is strong against external force and is not easily deformed. In particular, when a plurality of reinforcing portions are provided to such an extent that the aperture ratio of the first speaker unit is not hindered, particularly when the plurality of reinforcing portions are combined in a lattice shape or a rib shape, The rigidity of the member and the difficulty of deformation become more prominent.

  When each speaker module has a second speaker unit, a net member may be provided so as to cover the front portion of the second speaker unit. In this case, since the tip of the second edge is flush with the tip of the first edge and the side edge of the reinforcing portion, the net member is also supported by the tip of the second edge. As a result, the strength of the net member is improved.

  Similarly, when each speaker module has a bass reflex port, a net member may be provided so as to cover the front portion of the bass reflex port. In this case, the tip of the third edge is flush with the tip of the first edge and the side edge of the reinforcing portion, and is also flush with the tip of the second edge. If the net member is also supported by the tip of the edge, the strength of the net member is improved.

  As described above, according to the present invention, the first edge portion provided so as to surround the periphery of the front portion of the first speaker unit included in each speaker module and the inner peripheral wall of the first edge portion are spanned. With the one or more reinforcing portions provided in this manner, a ballproof measure for protecting the first speaker unit from the ball is realized. Moreover, since the inner peripheral wall of the first edge portion is formed in a substantially horn shape, the output characteristics of the first speaker unit are improved. Therefore, compared with the above-described conventional technology that is limited to the ball-proofing measure using only the punching net, it is possible to realize a stronger ball-proofing measure and to further improve the performance unique to the array speaker that provides high-quality sound. be able to.

  An embodiment of a line array speaker 10 to which the present invention is applied will be described with reference to FIGS.

  As shown in FIG. 1, the line array speaker 10 according to the present embodiment includes a plurality of, for example, eight speaker modules 20, 20,. Each of the speaker modules 20, 20,... Has the same specification, and each has a front panel 22 that functions as a baffle plate, and a low range as a first speaker unit that is attached to a substantially central portion of the front panel 22. For example, a cone-shaped woofer 24, and a plurality of, for example, three, high-frequency dome-shaped tweeters 26, 26, and 26 serving as second speaker units arranged in a vertical row on the lateral side of the woofer 24, And a longitudinal bass reflex port 28 provided on the opposite side of the row of the tweeters 26, 26 and 26 with the woofer 22 interposed therebetween. The front panel 22 is made of a hard resin such as polypropylene.

  The speaker modules 20, 20,... Are vertically arranged so that a row of woofers 24, 24,..., A row of tweeters 26, 26,. They are arranged in rows, that is, in a line. .., A low-frequency linear sound source composed of a row of woofers 24, 24,..., A high-frequency linear sound source composed of a tweeter 26, 26,..., And a bass reflex port 28, 28,. The line auxiliary speaker 10 is virtually formed, and the line array speaker 10 as a whole can provide high-quality sound.

  The orientation of each speaker module 20, 20,... (The depression angle of the central axis) can be adjusted, and the directivity angle of the entire line array speaker 10 is controlled by this adjustment. Then, after this directivity angle is controlled, that is, after the orientation of each speaker module 20, 20,... Is adjusted, each speaker module 20, 20,. 100 is integrally accommodated. At this time, the front panels 22, 22,... Of the speaker modules 20, 20,... Function as baffle plates as described above. When the line array speaker 10 is used as a fixed facility, the speaker modules 20, 20,... Are integrally accommodated in the common enclosure 100 as described above. On the other hand, when the line array speaker 10 is used for temporary use such as an event, the speaker modules 20, 20,... Are housed in individual enclosures (not shown) and appropriately connected by a connector (not shown). The

  Here, paying attention to each speaker module 20, as shown in FIGS. 2 and 3, the front panel 22 of each speaker module 20 exposes the front portion (sound wave emission surface) of the woofer 24 to the outside. Through-hole 30. Three through holes 32, 32, and 32 for exposing the front portions of the tweeters 26, 26, and 26 to the outside are provided beside the through hole 30. These through holes 32, 32 and 32 are provided at equal intervals, and accordingly, the tweeters 26, 26 and 26 are also provided at equal intervals. In this embodiment, each tweeter 26, 26 and 26 is attached to a common printed wiring board 34. A vertically long through hole 36 constituting the bass reflex port 28 is provided on the opposite side of the row of through holes 32, 32 and 32 for the tweeters 26, 26 and 26 across the through hole 30 for the woofer 24. ing.

  Further, referring also to FIG. 4, when attention is paid to the through hole 30 for the woofer 24, the peripheral portion 38 of the through hole 30 protrudes forward, which is the output direction of the sound from the woofer 24. Moreover, the inner peripheral wall of the peripheral portion 38 is formed in a horn shape so as to gradually spread outward as it goes forward. Furthermore, one long reinforcing portion (a shape similar to a rib) is provided in the longitudinal direction so as to span between the inner peripheral walls of the peripheral portion 38. Then, two similar reinforcing portions 42 and 42 are provided in the horizontal direction so as to be orthogonal to the vertical reinforcing portion 40. The front side edges of the reinforcing portions 40, 42 and 42 are evenly aligned with the front end of the peripheral portion 38, so to speak, they are flush.

  Next, paying attention to the through holes 32, 32, and 32 for the tweeters 26, 26, and 26, the peripheral portion 44 of each through hole 32 also protrudes forward. The inner peripheral wall of the peripheral portion 44 is also formed in a horn shape so as to gradually spread outward as it goes forward. The tweeters 26, 26 and 26 are not provided with reinforcing portions 40, 42 and 42 as in the woofer 24 side. However, the peripheral portion 44 between the two through holes 32 and 32 adjacent to each other is formed in an approximately mountain shape, and the tip of the peripheral portion 44 formed in the approximate mountain shape is a reinforcing portion 42 on the woofer 24 side. It is in the state connected to the side edge of the straight line. The tips of the peripheral portions 44, 44, and 44 on the tweeters 26, 26 and 26 side including this roughly mountain range are flush with the tip of the peripheral portion 38 on the woofer 24 side.

  When attention is paid to the through-hole 36 for the bass reflex port 28, a peripheral portion 48 of the through-hole 36 also protrudes forward, and its inner peripheral wall gradually expands outward toward the front. Is formed. Further, two long reinforcing portions 50 and 50 are provided in the lateral direction so as to span between the inner peripheral walls of the peripheral edge portion 48. The front side edges of the reinforcing portions 50 and 50 are flush with the front end of the peripheral portion 38 on the woofer 24 side, along with the front end of the peripheral portion 48. Further, the side edge on the front side of each reinforcing portion 50 and 50 is connected in a straight line to the side edge of the reinforcing portion 42 on the woofer 24 side and the tip of the generally mountain-shaped peripheral edge portion 44 on the tweeter 26 side. Is in a state.

  A substantially mountain-shaped portion is also formed by the peripheral portion 38 on the woofer 24 side and the peripheral portions 44, 44 and 44 on the tweeters 26, 26 and 26 side. Similarly, a substantially mountain-shaped portion is also formed by the peripheral portion 38 on the woofer 24 side and the peripheral portion 48 on the bass reflex port 28 side. And by the front-end | tip side of each reinforcement part 40,42,42,50 and 50 by the front-end | tip of each peripheral part 38,44,44,44 and 48 including these substantially mountain-shaped parts, it is flush. A grid-like frame 51 is formed.

  As shown in FIG. 5, a punching net 70 is usually attached to the speaker module 20 configured as described above. The punching net 70 is formed by, for example, pressing a metal plate having a thickness of about 1 [mm] to form a large number of small through holes and bending the metal plate into a substantially concave shape. In the state where the convex surface is directed forward and the concave surface is directed rearward, it is attached to the groove portion 50 provided in the front surface portion, the upper surface portion, and the bottom surface portion of the front panel 20. As a result, the punching net 70 is entirely supported by the lattice frame 51 described above. When the punching net 70 is attached to each speaker module 20 in this way, the overall configuration of the line array speaker 10 is as shown in FIG. For attaching the punching net 70 to the groove 50, for example, an adhesive or a double-sided tape is used, or a welding process is performed.

  As described above, according to the present embodiment, since the front panel 22 having the lattice-like framework 51 is attached to the front portion of each speaker module 20, the speaker module 20 (woofer 24, each tweeter) is attached. 26, 26, 26 and the bass reflex port 28) can be protected from external forces, and in particular for gymnasium applications, a ball-proofing measure is provided that protects from the ball. In addition, each of the peripheral portions 38, 44, 44, 44 and 48 constituting the skeleton 50 is formed in a substantially mountain-like shape or a shape close to this (that is, a shape having a certain thickness). The mechanical strength such as rigidity of the entire front panel 22 including the above becomes considerable. Accordingly, it is possible to expect a very solid ball-proofing effect as compared with the above-described conventional technology that is limited to ball-proofing measures using only a punching net.

  Further, even when the punching net 70 is attached, the punching net 70 is entirely supported by the frame 51, so even if the ball hits the punching net 70, the punching net 70 is not easily deformed. Therefore, the design of the entire speaker module 20 including the punching net 70, and thus the entire line array speaker 10, is also maintained. From another point of view, this means that a metal plate having a smaller thickness than that of the conventional punching net 70 can be used. In other words, the speaker module 20 including the punching net 70 can be used. It means that weight reduction and cost reduction of the whole, and hence the entire line array speaker 10, can be realized.

  Since the peripheral portions 38, 44, 44, 44 and 48 for the woofer 24, the tweeters 26, 26, 26 and the bass reflex port 28 are all formed in a horn shape, the woofer 24, The output characteristics of the entire speaker module 20 including the tweeters 26, 26, 26 and the bass reflex port 28, and thus the entire line array speaker 10, such as output efficiency and directivity, radiation impedance matching, and the like are improved.

  In other words, according to the present embodiment, it is possible to realize an extremely firm anti-ball measure as compared with the prior art, and to further improve the performance unique to the line array speaker 10 that provides high-quality sound.

  In this embodiment, the woofer 24 is a cone type and the tweeter 26 is a dome type. However, the present invention is not limited to this. That is, the present invention can be applied regardless of the types of the woofer 24 and the tweeter 26.

  Further, although the number of tweeters 26 is three for each speaker module 20, other numbers, that is, one or two, or a plurality of four or more may be used.

  Further, the bass reflex port 28 is not limited to a vertically long one, but may have other shapes such as a simple circular port. Further, when the bass reflex port 28 is relatively small, for example, sufficiently smaller than a ball assumed in ball games, the reinforcing portions 50 and 50 in front of the bass reflex port 28 are appropriately set. May be omitted and the number thereof may be reduced.

  The vertical reinforcing portion 40 or the horizontal reinforcing portions 42 and 42 in front of the woofer 24 are also omitted or increased or decreased as appropriate depending on the size (size) of the woofer 24. May be.

  The tweeter 26 may be provided with a similar reinforcing portion as necessary.

  In the present embodiment, each speaker module 20 is a bass-reflex type provided with the bass-reflex port 28. However, the present invention can be applied to a sealed type that does not include the bass-reflex port 28. The two-way type including the woofer 24 and each tweeter 26, 26, and 26 is given as an example. For example, the three-way type including a mid-range squawker, or the one-way type including only the squawker. There may be.

  Further, the front panel 22 is made to function as a baffle plate, but is not limited thereto. That is, the front panel 22 and the baffle plate may be separate bodies.

  The number of speaker modules 20 constituting the line array speaker 10 may not be eight.

It is a perspective view which shows the external appearance of the whole line array speaker to which this invention was applied. It is a figure which shows the specific structure of the speaker module in FIG. It is a perspective view which shows the external appearance of the speaker module in FIG. It is a perspective view which shows the external appearance of the front panel in FIG. It is a figure which shows the state by which the punching net was attached to the speaker module of FIG. It is a figure which shows the state by which the punching net was attached to the line array speaker of FIG.

Explanation of symbols

10 Line array speaker 20 Speaker module 22 Front panel 24 Woofer 26 Tweeter 28 Bass reflex port 30, 32, 36 Through hole 38, 44, 48 Peripheral part 40, 42, 50 Reinforcement part

Claims (6)

A panel attached to a front portion of each of the plurality of speaker modules of an array speaker having a plurality of speaker modules,
Each of the above speaker modules has a first speaker unit,
A first edge portion that surrounds the periphery of the front portion of the first speaker unit and is provided to protrude forward from the front portion of the first speaker unit;
One or more reinforcing portions provided so as to span between the inner peripheral walls of the first edge, the side edge on the front side being aligned with the tip of the first edge;
Comprising
The inner peripheral wall of the first edge is formed in a generally horn shape so as to gradually spread outward as it goes forward.
Front panel for array speakers. The reinforcing portion is a substantially long member provided in a state along the main surface in the forward direction.
The front panel for an array speaker according to claim 1. Each of the speaker modules has a second speaker unit having a smaller diameter than the first speaker unit,
A second edge provided to surround the periphery of the front portion of the second speaker unit and to protrude forward from the front portion of the second speaker unit;
The inner peripheral wall of the second edge is formed in a generally horn shape so as to gradually spread outward as it goes forward,
The tip of the second edge is aligned with the tip of the first edge,
The front panel for an array speaker according to claim 1 or 2. Each of the speaker modules has a plurality of the second speaker units arranged in a row,
The second edge between the two second speaker units adjacent to each other is continuous with the reinforcing portion;
The front panel for an array speaker according to claim 3. Each of the above speaker modules has a bass reflex port,
A third edge provided to surround the periphery of the front portion of the bass reflex port and to protrude forward from the front portion of the bass reflex port;
The tip of the third edge is aligned with the tip of the first edge,
The front panel for an array speaker according to any one of claims 1 to 4. A plurality of the reinforcing portions,
A net member provided so as to cover the front portion of the first speaker unit in a state of being in contact with at least a tip of the first edge portion and the side edges of each of the plurality of reinforcing portions;
The front panel for an array speaker according to any one of claims 1 to 5.

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