JP2011066866A - Speaker enclosure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an integrated speaker enclosure that can eliminate the generation of a standing wave, can conscientiously reproduce a sound from a loud sound to a soft sound by absorbing an unwanted vibration causing unnecessary leaking noise, and can obtain an undercut having not been obtained in the molding of a conventional manufacturing method. <P>SOLUTION: A free mold of gypsum or ceramic powder is seamlessly and integrally created or replicated by a three-dimensional modeling machine, so that the speaker enclosure is created with excellent sound quality characteristics and decorative appearance. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method of manufacturing a speaker enclosure using a laminated molding machine mainly composed of a gypsum material, and an enclosure structure thereof.

  The conventional speaker enclosure material and its manufacturing method require a sound absorbing material for controlling the reflected sound inside the enclosure, but it does not provide a sufficient sound absorbing effect.

  As shown in FIG. 7, in the speaker system of the actual fair 1-205016, since the enclosure is spherical, focusing on the fact that most of the internally reflected sound waves pass through the center of the speaker enclosure, the glass wool cylindrical sound absorption A material is provided at the center of the back of the speaker to obtain a sound absorbing effect.

The speaker cabinet (FIG. 8) in Japanese Patent Laid-Open No. 2000-115872 has a structure in which a porous sound absorbing material made of a hollow fiber made of synthetic fiber is attached to almost the entire interior.
In the manufacture of speakers as in the above-mentioned conventional example, attaching a columnar sound absorbing material to the inner central part or attaching a sound absorbing material to the inner wall surface of the speaker cabinet will increase the manufacturing process accordingly, and the latter example According to the above, since the adhesive application portion for attaching the sound absorbing material extends over almost the entire inner wall surface of the cabinet, a material that does not attenuate sound quality characteristics must be selected as the adhesive to be used.
Reality 1-25016 JP2000-115872A

In the conventional enclosure structure and manufacturing method, noise that adversely affects the sound quality is generated by vibration caused by the seam of the enclosure wall surface and sound reflected by the wall surface material.
There has been a need to specify the shape of the sound absorbing material for improving such points and to add a step of providing the sound absorbing material.

  In the present invention, the enclosure is layered using a particulate porous material to effectively create a noise-absorbing optimum acoustic interior space that is adapted to the size of the speaker unit by a minimum process. The present invention provides a speaker enclosure capable of improving sound quality in a full range even for small-sized speakers, not limited to size speakers.

  By using a computer-controlled laminated molding machine, an integrated enclosure having an undercut, which is impossible with conventional molding methods, is formed.

  The constituent material of the present invention is a particulate porous material, and the sound generated from the sound source is irregularly reflected on the concave and convex wall surface inside the enclosure by laminating and forming the concave and convex shape on the inner wall surface of the speaker enclosure. As a result, the resonance of the reflected sound is suppressed.

  Furthermore, by using a fine porous enclosure component material with gypsum having a specific gravity as the main component, vibration of the enclosure itself due to the generated internal sound wave, which is an important element for high-quality faithful sound reproduction, is suppressed. Combined with the sound absorption characteristics of this, the generation of standing waves can be minimized, and even when the speaker unit is miniaturized, it is possible to reproduce high-quality faithful sound with low noise. A full range speaker can be realized.

  Molding model data captured by a three-dimensional scanner or three-dimensional data created by three-dimensional CAD is converted into output data of an ink-jet method three-dimensional printer, using gypsum powder and binder, which are fine-particle porous materials, as raw materials, an ink-jet method A speaker enclosure which is a three-dimensional mold of a desired shape is created by forming a slice lamination surface by the above.

  FIG. 1 is a perspective view of a finished product in which the enclosure 1 of the present invention is formed in a cubic shape. The casing 2 is an integrally formed body with no joints, and a fin having a curved tip on the inner wall surface of the casing 2. A convex body 3 is formed integrally with the casing 2.

  As a manufacturing method, based on the slice data of the cubic enclosure 1 which is a laminated aggregate, the gypsum fine particles 3 are laminated on the inner wall surface by laminating the gypsum fine particles while solidifying by binder injection using a three-dimensional molding machine. Create a cubic enclosure with If necessary, the outer wall surface may be colored or lacquered.

  In addition to gypsum, ceramic powder or carbon powder may be used alone to produce an enclosure, and in combination with this, a single layer of shirasu balloon fine particles with good sound absorption and sound insulation may be interposed, Alternatively, it can be mixed and mixed to form a laminate.

  FIG. 2 is a side sectional view of the enclosure 1 of the present invention, and an opening 4 for wiring is provided in the center of the rear wall. The plurality of fin-shaped convex bodies 3 shown here constituting the inner wall surface of the housing portion 2 have curved tip portions and are shown in the horizontal sectional view (FIG. 3) of the present invention. It may be formed with continuity with the fin-shaped convex body 3 on the side wall, the ceiling and the bottom, and the peak of the fin-shaped convex 3 on the ceiling and the side wall and between the bottom and the side wall. May be formed so as to alternately enter the other valley.

  The radius of curvature at each tip of the fin-shaped convex body 3 has a random inner diameter R that does not have large and small regularity, and forms a concave-convex portion on the inner wall surface composed of the fin-shaped convex body 3. Similarly, the height difference between the crest and trough is also randomly formed. By providing irregularity in this way, the resonance of the generated sound is more effectively suppressed.

  FIG. 4 is a view as seen from the front of the enclosure 1 of the present invention. In this embodiment, the inner wall of the enclosure 1 constituted by the fin-shaped convex bodies 3 has a substantially rectangular prism inner surface shape with appropriate arcs on the four sides. However, an appropriate shape such as a cylindrical shape or an elliptical column shape may be employed.

FIG. 5 is a sectional view seen from the side of the enclosure 1 and shows the manufacturing process.
Based on the slice data of the enclosure 1, starting from the bottom surface (I) by using a three-dimensional molding machine and laminating the gypsum fine particles while solidifying by binder injection, (II), (III), ( IV) and (V) are sequentially laminated to complete the integrated enclosure 1 having an undercut that was not possible with mold forming.
An appropriate sound absorbing material is placed inside the enclosure 1 as necessary, a speaker is fitted from the front, and a wiring process through the opening 4 is performed to obtain a speaker unit.

  The 3D molding machine can be freely molded even if it has a complicated external shape and internal structure, so it is suitable for the production of interior decorations of various shapes. Any external shape can be adopted as long as it has a built-in structure and an acoustic internal space shape. Here, an example of creating a speaker enclosure 1a in the shape of an apple will be shown as an example having a decorative visual effect.

  FIG. 6 shows three-dimensional slice data created from the appearance of an apple, and an enclosure body 2 at the center of an apple-shaped enclosure 1a formed by laminating gypsum particles using a three-dimensional molding machine based on the slice data. The wiring opening 4 is provided on the bottom surface so as not to impair the aesthetic appearance.

  The enclosure created by the three-dimensional molding machine of the present invention can take outline data with a three-dimensional scanner, regardless of whether it is concrete or abstract, besides the apple-shaped example 2 and data creation by three-dimensional CAD. If possible, it can be provided as various ornaments with a speaker function.

  The speaker enclosure of the present invention is manufactured by a three-dimensional molding machine using a material with high specific gravity, such as gypsum and ceramic, and also has excellent sound absorption and sound insulation properties, so any three-dimensional shape can be created. Even if the reproduced sound is a weak volume, it has a resonance avoidance structure and a sound absorbing effect as described above, so that it can absorb unnecessary vibrations that become a wasteful noise and express straight and straight sounds from strong to weak. An optimal speaker unit can be provided as a background sound source with a small volume.

  In addition, 3D CAD data can be created for various 3D objects, and 3D molding machines can be used to create 3D replicas based on the converted slice data. Can also have.

  It is a perspective view of this invention speaker enclosure.   It is side surface sectional drawing of this invention.   It is a horizontal sectional view of the present invention.   It is a front view of the present invention.   It is manufacturing process sectional drawing seen from the side of the enclosure of this invention.   Side sectional view of the center of the enclosure with an apple-shaped exterior   It is side surface sectional drawing of the spherical speaker enclosure of a prior art example.   It is side surface sectional drawing of the speaker cabinet of a prior art example.

1 Enclosure 1a Apple-shaped enclosure 2 Enclosure (enclosure body)
3 Fin-shaped convex body 4 Wiring opening

Claims (5)

  A speaker enclosure that is made of laminated gypsum using a three-dimensional molding machine.   The speaker enclosure according to claim 1, wherein a plurality of different materials are layered, or different materials are included as random layers.   2. The speaker enclosure according to claim 1, wherein the main material other than gypsum is ceramic powder or carbon powder.   2. The speaker enclosure according to claim 1, further comprising an inner wall surface having a concavo-convex shape so as to diffusely reflect sound from a sound source.   5. The speaker enclosure according to claim 4, wherein the tip of the concavo-convex shape portion of the inner wall surface is a plurality of large and small fin-shaped convex bodies having a curved shape.