JP3957678B2 - Speaker enclosure - Google Patents

Description

  The present invention relates to a speaker enclosure.

The speaker enclosure is a box for partitioning the space on the front side and the space on the rear side of the speaker unit (diaphragm), and the wall material is generally disclosed in Non-Patent Document 1. Natural wood (grind) or processed materials such as veneer core plywood and particle board are used.
Tamon Saeki, “Strengthen! Encyclopedia of Speakers and Enclosures”, Seikodo Shinkosha Co., Ltd., February 26, 1990, 5th edition, p. 127

  Incidentally, it is needless to say that the enclosure (speaker system) has high mechanical strength. Also, it is required that the weight is small from the viewpoint of portability, and that the internal capacity is large from the viewpoint of low-frequency reproducibility. However, the wall material disclosed in Non-Patent Document 1 described above cannot satisfy all of these requirements. For example, if the enclosure is made of a thick wall material, the mechanical strength can be secured, but it is disadvantageous in terms of weight and capacity. On the other hand, when the enclosure is formed of a wall material having a small thickness, it is advantageous in terms of weight and capacity, but sufficient mechanical strength cannot be obtained. Recently, in order to satisfy all these requirements, enclosures made of light metal or synthetic resin have been put into practical use. However, enclosures using such materials are generally expensive. That is, conventionally, an enclosure that satisfies all the requirements of high mechanical strength, light weight, and large capacity could not be realized at low cost.

  Therefore, an object of the present invention is to realize a speaker enclosure that satisfies all the requirements of high mechanical strength, light weight, and large capacity at a low cost.

The speaker enclosure of the present invention includes a wall constituting the housing, a plurality of protrusions formed on the inner surface of the wall to reinforce the wall, and a plurality of protrusions while exposing the inner surface of the wall to the inner space of the housing. Connecting means for connecting the protrusions to each other.

That is, in this invention, the some protrusion part for reinforcing the said wall is formed in the inner surface of the wall which comprises a housing | casing. And these several protrusion parts are mutually connected by the connection means. Therefore, by providing such connecting means, the reinforcing action of the wall by the plurality of protrusions is increased, and the mechanical strength is sufficiently maintained even if the thickness of the wall is correspondingly reduced. Moreover, the wall itself and by extension, the casing are lightened by reducing the thickness of the wall. Further, the connecting means is provided so as to expose the inner side surface of the wall to the inner space of the casing, in other words, to connect the space near the inner side surface of the wall and the inner space of the casing. Thus, when the wall thickness is reduced, the internal space of the housing is expanded accordingly. That is, an enclosure having high mechanical strength, light weight, and large capacity can be realized without using expensive materials such as synthetic resin and light metal.

  In addition, as a protrusion part, there exists a so-called protrusion which extends | stretches in a streak shape, for example. That is, since this protrusion functions as a rib, the mechanical strength against bending of the wall is reinforced in the extending direction of the protrusion. The plurality of protrusions functioning as ribs are connected by the connecting means in this way, so that the mechanical strength of the wall is reinforced in the connecting direction by the connecting means.

  In this case, it is desirable to provide the plurality of protrusions so as to extend parallel to each other.

  Further, it is desirable that the connecting means connects the tip portions of the protrusions.

Further, from another point of view, the speaker enclosure of the present invention includes a wall portion constituting a casing. The wall portion includes a first surface that is an outer surface of the housing, a second surface that is parallel to the first surface and disposed in the internal space of the housing, the first surface, A plurality of hollow portions provided between the second surfaces and independent from each other, and a plurality of hollow portions provided on the second surface of the wall portion so as to communicate each of the plurality of hollow portions with the internal space of the housing. Through holes.

That is, in the invention viewed from another viewpoint, between the first surface serving as the outer surface of the wall portion constituting the housing and the second surface disposed in the internal space of the housing , that is, the wall portion. Are provided with a plurality of hollow portions. By providing such a hollow part, the wall part itself and by extension the casing is lightened. Moreover, these hollow parts are mutually independent, and in other words, the part which partitions off each said hollow part from each other is formed, and the mechanical strength of a wall part is maintained by forming such a part. Furthermore, since each hollow part is connected with the internal space of the housing via the through-hole, the internal space of the housing is expanded by the amount of the hollow portion. Therefore, as described above, an enclosure having high mechanical strength, light weight, and large capacity can be realized without using expensive materials such as synthetic resin and light metal.

In addition, it is desirable to provide the plurality of hollow portions so that a coupling portion that couples the first surface and the second surface of the wall portion is formed. Specifically, when the wall portion is viewed from a direction perpendicular to the first surface or the second surface , the plurality of hollow portions are provided at a distance from each other. If it does in this way, the said joint part will be formed of the part between each hollow part, and the mechanical strength of a wall part is maintained by forming this joint part.

Such a wall can be formed by, for example, extrusion molding. Specifically, an integral block body including a first surface, a second surface, and a plurality of hollow portions is formed by the extrusion molding. And a wall part is formed by forming a some through-hole in the 2nd surface of this block body. By adopting extrusion molding in this way, the wall portion can be formed more inexpensively and easily. However, the plurality of hollow portions are arranged in a line along a first direction along each of the first surface and the second surface, and are perpendicular to the first direction and have the first surface and It is required to be provided to extend in parallel along a second direction along each of the second surfaces.

  The through hole can be formed by cutting. That is, in general, some processing such as shaping a joint for joining the walls to each other is performed on the wall constituting the casing. And as the processing method, cutting is often adopted. Therefore, in such a cutting process, if a through hole is formed together, it is possible to suppress an increase in work process and manufacturing cost for providing the through hole.

In addition, if an extremely large number of through holes are provided, the mechanical strength of the wall portion decreases accordingly, so the number of the through holes is set to a number that can sufficiently secure the required mechanical strength. That is essential.

The present invention can also be applied to a method for manufacturing a speaker enclosure. That is, a block body forming process for forming the block body by extrusion molding and a through hole forming process for forming a through hole in the block body are provided. And the housing of a speaker enclosure should just be comprised using the block body in which this through-hole was formed as a wall part.

  According to the present invention, even if an expensive material such as a synthetic resin or light metal is not used, all the requirements desired for a speaker enclosure that are high in mechanical strength, light in weight, and large in capacity are satisfied. Can do. That is, an enclosure that satisfies all of these requirements can be realized at low cost.

An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the speaker system 10 according to this embodiment is of a so-called phase-inversion (Bass-Reflex) type. A speaker unit 16 provided in the approximate center of a baffle plate (front plate) 14 and a port 18 provided below the speaker unit 16 are provided. The speaker unit 16 is a so-called full-band type having a relatively wide reproduction band, and the port 18 is a cylindrical type called a standard type.

  The six walls constituting the enclosure 12, that is, the baffle plate 14, the rear plate 20, the right side plate 22, the left side plate 24, the top plate 26, and the bottom plate 28 are made of, for example, particle board. Of these, the inner surface of each of the baffle plate 14, the rear plate 20, the right side plate 22 and the left side plate 24 (surface on the inner space side of the enclosure 12) has a long protrusion as shown in FIG. A plurality of strips, for example, ribs 30 are provided. 2 is a diagram showing the internal structure of the speaker system 10 (enclosure 12). Specifically, FIG. 2 is a diagram of a portion cut out along the dotted line 32 in FIG. . FIG. 3A shows a view of the baffle plate 14, the rear plate 20, the right side plate 22, and the left side plate 24 as viewed from the inside of the enclosure 12, and the A− in FIG. 3A. A cross section A is shown in FIG.

  Here, for example, paying attention to the rear plate 20, each rib 30 protrudes further from the inner surface of the rear plate 20 toward the inside of the enclosure 12 and extends along the vertical direction of the rear plate 20. In other words, it is provided so as to extend from one of the top plate 26 and the bottom plate 28 toward the other. Further, the ribs 30, 30,... Are provided in parallel at regular intervals Pa (see FIG. 3B).

  It should be noted that the width dimension Wa (see FIG. 3B) of each rib 30, 30,... Is uniform, for example, slightly larger than the thickness dimension t of the rear plate 20 itself (see FIG. 3B). It is considered small. Further, the projecting dimensions of the ribs 30, 30,..., Specifically, the dimension Ha (see FIG. 3B) in the direction perpendicular to the inner surface of the rear plate 20, are also made uniform, for example, the width dimension Wa. About 3 to 5 times. Further, the interval Pa between the ribs 30, 30,... Is substantially equal to the protruding dimension Ha or slightly larger than the protruding dimension Ha. In addition, the length dimension of each rib 30, 30, ..., specifically, the dimension in the direction along the inner surface of the rear plate 20 (vertical direction in FIG. 3A) is larger than the respective projecting dimension Ha. Needless to say.

  As described above, since the plurality of ribs 30, 30,... Are provided on the inner surface of the rear plate 20, the mechanical strength against bending of the rear plate 20 is reinforced in the extending direction of the ribs 30, 30,. Is done. These ribs 30, 30,... Are also made of particle board.

  And the connection member 34 made from a particle board is provided so that the front-end | tip part of each rib 30, 30, ... may be covered. The connecting member 34 has a shape in which a plurality of through holes 36, 36,... Are provided on a flat plate having a thickness dimension tb (see FIG. 3B), and the ribs 30, 30,. Are firmly joined to the tips of the ribs 30, 30,...

  Each of the through holes 36, 36,... Has a regular hexagonal shape except a part thereof, specifically, the one located at the center in FIG. ))), It is formed in a honeycomb shape. The interval Pb is slightly larger than the width dimension Wa of the rib 30. Further, the distance between the opposing sides of each of the regular hexagonal through holes 36, 36,..., The width dimension Wb (see FIG. 3A) is slightly less than twice the interval Pa between the ribs 30, 30,. Has been. Each of the regular hexagonal through holes 36, 36,... Is formed such that its own center point and a pair of vertices facing each other across the center point are positioned on any one of the ribs 30. Yes. In other words, the regular hexagonal through-hole 36 is formed so as to straddle the two spaces 38 and 38 sandwiched between any three ribs 30, 30 and 30 that are continuously arranged.

  On the other hand, some of the through holes 36, 36,... Other than the regular hexagon described above (located in the center in FIG. 3A) are roughly elongated hexagons, or a part of two regular hexagons superimposed. It has a bowl shape. Among these, the width dimension (distance between long sides facing each other) Wb ′ (see FIG. 3A) of the elongated hexagonal through holes 36, 36,... Is larger than the interval Pa between the ribs 30, 30,. Slightly smaller. And each of these elongate hexagonal through-holes 36, 36, ... has the longitudinal direction (long side) along the extending direction of the ribs 30, 30, ..., and any two adjacent ribs 30, 30 ... It is formed so as to be located above the space 38 sandwiched between the two.

  The width dimension (distance between two farthest sides) Wb ″ (see FIG. 3A) of the bowl-shaped through holes 36, 36,... Is three times the interval Pa between the ribs 30, 30,. Each of these bowl-shaped through-holes 36, 36,... Is one of the two most distant sides along the extending direction of the ribs 30, 30,. It is formed so as to straddle the three spaces 38, 38 and 38 sandwiched between the four ribs 30, 30,.

  In this way, since the ribs 30, 30,... Are connected to each other by the connecting member 34, the rearward is also possible in the direction connected by the connecting member 34, in other words, in the direction across the ribs 30, 30,. The mechanical strength against bending of the plate 20 is reinforced. That is, the connecting member 34 functions as a reinforcing means for reinforcing the mechanical strength of the rear plate 20 in the same manner as the ribs 30, 30,. Therefore, even if the thickness t of the rear plate 20 itself is relatively small, the mechanical strength against bending of the rear plate 20 itself is maintained. In other words, compared with the case where the ribs 30, 30,... And the connecting member 34 are not provided, the thickness dimension t of the rear plate 20 itself necessary for obtaining a predetermined mechanical strength can be reduced. . Therefore, the rear plate 20 itself can be reduced in weight.

  The connecting member 34 is provided with a plurality of through holes 36, 36,..., And the inner surface of the rear plate 20 is exposed to the internal space of the enclosure 12 through the through holes 36, 36,. It is in the state. In other words, the spaces 38, 38,... Near the inner surface of the rear plate 20 and sandwiched between the ribs 30, 30,. It is in a state of communicating with. That is, the spaces 38, 38,... Contribute as part of the internal space of the enclosure 12, and the internal space of the enclosure 12 is expanded correspondingly. This is extremely effective in improving the low frequency reproducibility of the speaker system 10 (lowering the low frequency limit frequency).

  Like the rear plate 20, the baffle plate 14, the right side plate 22, and the left side plate 24 are also provided with ribs 30, 30,. However, the baffle plate 14 is provided with notches or the like not shown in the ribs 30, 30,... And the connecting member 34 so as not to mechanically interfere with the speaker unit 16 and the port 18.

  As described above, in this embodiment, the baffle plate 14, the rear plate 20, the right side plate 22 and the left side plate 24 constituting the enclosure 12 have the ribs 30, 30,. Is provided. Therefore, even if the thickness dimension t of these plates 14, 20, 22, and 24 themselves is relatively small, the necessary mechanical strength is maintained. Further, by reducing the thickness dimension t, the respective plates 14, 20, 22 and 24 themselves, and thus the enclosure 12 itself, can be reduced in weight. Furthermore, since the spaces 38, 38,... In the vicinity of the inner side surfaces of the plates 14, 20, 22, and 24 contribute to the internal space of the enclosure 12, the internal space is expanded accordingly. The enclosure 12 including the plates 14, 20, 22, 24, 26, and 28 is made of a particle board that is cheaper than the above-described light metal or synthetic resin. That is, according to this embodiment, a speaker enclosure that satisfies all the requirements of high mechanical strength, light weight, and high capacity can be realized at low cost.

  The plates 14, 20, 22, and 24 including the ribs 30, 30,... And the connecting member 34, that is, the wall portions can be formed as follows. That is, first, an integral block body 100 as shown in FIG. 4 is formed by extrusion molding. The block body 100 includes a surface 102 that is an outer surface of the enclosure 12 and a surface 104 that is to be disposed in the internal space of the enclosure 12. A plurality of hollow portions 106, 106,... Independent of each other are provided between the surfaces 102 and 104. Each of the hollow portions 106, 106,... Is arranged in a line along the longitudinal direction of one side surface (upper side surface in FIG. 4) of the block body 100, and the other side surface (lower side in FIG. It is provided so that it may extend in parallel toward the side surface. In other words, when the block body 100 is viewed from a direction perpendicular to the surfaces 102 and 104, the hollow portions 106, 106,... Are spaced apart from each other and from the one side to the other side. It is provided so as to extend in parallel toward the side. And the cross-sectional shape of each hollow part 106,106, ..., strictly, the cross-sectional shape crossing each extending direction is made into the rectangle. As a result, a plurality of elongated coupling portions 108 that couple the surfaces 102 and 104 are formed between the surfaces 102 and 104.

  And, strictly speaking, with respect to the inner surface 104 of the block body 100, as shown by the dotted lines 112, 112,... In FIG. A plurality of through holes corresponding to the holes 36, 36,. Specifically, the through holes 112, 112,... Are formed so that the space on the surface 104 side communicates with the hollow portions 106, 106,.

  With this configuration, the connecting member 34 described above is formed by the portion 114 other than the portion in which the through holes 112, 112,... Are formed in the thick portion 110 on the surface 104 side of the block body 100. Is done. Each of the plates 14, 20, 22, and 24 is formed by the thick portion (flat portion) 116 on the outer surface 102 side. Further, the ribs 30, 30,... Are formed by the coupling portions 108, 108,..., And the spaces 38, 38,.

  The drilling operation of each through-hole 112, 112,... Is performed together with the operation of forming notches for joining indicated by alternate long and short dashed lines 118 and 118 in FIG. That is, the baffle plate 14, the rear plate 20, the right side plate 22, and the left side plate 24 are joined to each other by, for example, a well-known hiring method. Then, notches 118 and 118 are provided in order to realize the joining by the hiring method. The notches 118 and 118 are formed by, for example, cutting by an automatically controlled woodworking router. In addition, the through holes 112, 112,... In this way, the through holes 112, 112,... Are formed together with the notches 118 and 118 by cutting with a woodworking router, thereby increasing the work process and the manufacturing cost by providing the through holes 112, 112,. Can be suppressed. Further, the ribs 30, 30,... And the connecting member 34 are integrally formed as the block body 100 together with the respective plates 14, 20, 22, and 24. Therefore, the ribs 30, 30,. The increase in the work process and the manufacturing cost due to is suppressed. That is, there is no particular disadvantage caused by applying this embodiment.

  As an example, when the outer diameter volume of the speaker system 10 (enclosure 12) is about 15 liters to 20 liters, specifically, the width dimension W in FIG. mm] before and after, and when the height dimension H is around 400 [mm], the thickness dimension t of the baffle plate 14, rear plate 20, right side plate 22 and left side plate 24 should be about 5 [mm]. desirable. The width dimension Wa, the protrusion dimension Ha, and the interval Pa of the ribs 30, 30,... Are preferably about 3 [mm], 12 [mm], and 15 [mm], respectively. Furthermore, it is desirable that the thickness dimension tb of the connecting member 34 be about 3 [mm].

  Further, in this embodiment, the ribs 30, 30,... And the connecting member 34 are provided for the baffle plate 14, the rear plate 20, the right side plate 22, and the left side plate 24, but the top plate 26 and the bottom plate 28 are also provided with The ribs 30, 30,... And the connecting member 34 may be provided.

  Further, the baffle plate 14, the rear plate 20, the right side plate 22, the left side plate 24, the ribs 30, 30,... And the connecting member 34 are not limited to the particle board, but are formed of other wood such as a sawn timber or a veneer core plywood. Also good. Moreover, you may form these with light metals, such as aluminum, a synthetic resin, etc.

  And although the shape of the through-holes 36, 36,... Formed in the connecting member 34 is a hexagon or a generally bowl shape, it is not limited to this. For example, another shape such as a circle, a triangle, or a rectangle may be used. Further, the through holes 36, 36,... May not be provided in a honeycomb shape, but may be provided at random, for example.

  4 is not limited to a rectangular cross section. For example, it may be a circular or polygonal cross section. Further, the shape or area of the cross section need not be constant between the hollow portions 106, 106,. And the space | interval Pa of these hollow parts 106,106, ... may not be constant.

And each rib 30, 30, ... is not restricted to what was demonstrated by this embodiment. For example, the interval Pa may be non-uniform .

  Furthermore, in this embodiment, the case where the present invention is applied to the phase-inversion type enclosure 12 has been described, but it goes without saying that the present invention can also be applied to other types (systems) of enclosures. Further, the number of speaker units 16 is not limited to one.

1 is a perspective view showing an appearance of a speaker system according to an embodiment of the present invention. It is a perspective view which shows the internal structure of the speaker system. FIG. 3 is an enlarged view of the wall of the enclosure in FIG. 2, (a) is a view of the wall viewed from the inside of the enclosure, and (b) is a cross-sectional view taken along line AA in (a). It is an illustration figure for demonstrating the manufacturing process of the enclosure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Speaker system 12 Enclosure 14, 20, 22, 24, 26, 28 Wall 30 Rib 34 Connecting member 36 Through-hole 38 Space

Claims (6)

The wall part which comprises a housing is comprised,
The wall portion includes a first surface that is an outer surface of the housing, a second surface that is parallel to the first surface and is disposed in the internal space of the housing, the first surface, A plurality of hollow portions provided between the second surfaces and independent from each other, and a plurality of penetrations provided in the second surface so as to communicate each of the plurality of hollow portions and the internal space of the housing A hole, and
The plurality of hollow portions are arranged in a line along a first direction along each of the first surface and the second surface, and are perpendicular to the first direction, and the first surface and Provided to extend in parallel along a second direction along each of the second surfaces;
An integral block body including the first surface, the second surface, and the plurality of hollow portions is formed by extrusion,
The wall portion is formed by forming the plurality of through holes in the second surface of the block body by cutting.
Speaker enclosure. The speaker enclosure according to claim 1, wherein the cutting for forming the plurality of through holes is performed together with the cutting for forming a joint portion between the wall portions. The speaker enclosure according to claim 1 or 2, wherein the wall portion is made of particle board . An integral block body comprising a first surface and a second surface that are parallel to each other, and a plurality of hollow portions that are provided between the first surface and the second surface and are independent of each other, is formed by extrusion molding. A block body forming process to be formed;
A through hole forming process of forming a plurality of through holes in the second surface of the block body by cutting so as to communicate each of the plurality of hollow portions and the space on the second surface side;
Comprising
The plurality of hollow portions are arranged in a line along a first direction along each of the first surface and the second surface, and are perpendicular to the first direction, and the first surface and Provided to extend in parallel along a second direction along each of the second surfaces;
The housing of the speaker enclosure is configured by using the block body in which the plurality of through-holes are formed as a wall portion, and in this case, the first surface is an outer surface of the housing, and the second surface is the outer surface of the housing. Placed in the interior space,
Manufacturing method of speaker enclosure. The speaker enclosure according to claim 4, wherein the cutting for forming the plurality of through holes in the through hole forming process is performed together with the cutting for forming a joint portion between the wall portions. Production method. The method for manufacturing the speaker enclosure according to claim 4 or 5, wherein the wall portion is made of particle board.

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