Speaker enclosure

Abstract

To provide a speaker enclosure capable of reducing an internal standing wave as much as possible in a solid having the same number of vertices as that of a cuboid or a cube, being easy to produce, and expressing its function in appearance.SOLUTION: By making front and back surfaces trapezoidal when viewed from the front, inverting one of them upside down, and making the heights of the upper base and the lower base different from each other, an internal standing wave other than in a depth direction can be eliminated, and an effect can be expressed by an appearance. In addition, a 3D printer is used for production in order to reduce a difficulty of production.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a speaker enclosure that can easily reduce the internal parallelepipeds, has an appearance similar to a cube or rectangular parallelepiped, and can express its function through its appearance. [Background technology]

[0002] Speaker enclosures are generally made from wooden boards or other materials in the shape of a cube or rectangular prism, and have many parallel surfaces inside, which cause large internal standing waves and the resulting unwanted noise.

[0003] To prevent unwanted sounds caused by these internal standing waves from leaking out, sound-absorbing material is generally placed inside the enclosure.

[0004] However, placing sound-absorbing materials is not a fundamental solution, as sound-absorbing materials absorb both unwanted and desired sounds, making it extremely difficult to select and place the appropriate materials to achieve the best results.Furthermore, expensive sound-absorbing materials have the drawback of being costly.

[0005] One way to improve this is to make the speaker enclosure a polygon or sphere with more vertices than a cube or rectangular prism. However, there is a certain logic behind speaker enclosures being cubes or rectangular prisms, which are square when viewed from the front, as they have the advantages of good space efficiency, a wide, flat base that makes installation stable, and ease of production. Enclosures that are not cubes or rectangular prisms have drawbacks that negate many of these advantages.

[0006] Even if the exterior is a rectangular parallelepiped or cube, there are attempts to eliminate internal standing waves while maintaining the appearance by arranging slopes or the like only in the internal structure. However, this attempt has the drawback that it is difficult to visually convey the ingenuity, as there is no difference in appearance from a structure where no countermeasures have been taken. [Prior art documents] [Non-patent literature]

[0007] [Non-Patent Document 1] Publisher: Kumio Horiuchi "Let's Make a Speaker!" Ongaku No Tomosha 2022 pp. 17, 18, 19, 20, 21 Summary of the Invention [Problem to be solved by the invention]

[0008] The problem we are trying to solve is to provide a fundamental solution to the problem of standing waves occurring inside speaker enclosures by using the same number of vertices as a cube or rectangular prism, making it easy to manufacture and expressing the effect in its appearance. [Means for solving the problem]

[0009] The main feature of this invention is that when viewed from the front, the front plate is a trapezoid, and the back plate is a trapezoid with a different height by flipping it upside down, and the vertices are connected. The production is mainly done using fused deposition modeling and stereolithography 3D printers, which reduces the difficulty of production. [Effects of the Invention]

[0010] The speaker enclosure of this invention has the advantage that by joining the four corners of trapezoids that are inverted upside down and of different heights, the parallel planes on the top, bottom, left, and right sides disappear when viewed from any position in the coronal cross section from front to back, eliminating internal standing waves in any direction other than from front to back, while having the same number of vertices as a cube or rectangular prism, and yet function is expressed through its appearance.In addition, because 3D printers can be used to create objects with a certain amount of overhang, the twisting of the surfaces that occurs when the vertices of two inverted trapezoids are joined together is not a problem as long as it does not exceed the allowable overhang value. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is an explanatory diagram showing the trapezoid in front as seen from the front (Example 1). [Figure 2] FIG. 2 is an explanatory diagram showing the trapezoid at the back as viewed from the front (Example 1). [Figure 3]Figure 3 shows the difference in shape by superimposing the figures and symbols in Figures 1 and 2. (Example 1) DETAILED DESCRIPTION OF THE INVENTION

[0012] The shape is created by connecting the four corners of trapezoids of different heights, with the top and bottom inverted. In this case, there is no need to change the thickness of the plate, and it can be constant. Furthermore, the ratio of the width and height of the upper and lower bases of the trapezoid, as well as the length in the depth direction, are not important. A 3D printer is mainly used for production. [Example]

[0013] When viewed from the front, there is a space in the depth direction between Figure 1, which shows the front plate, and Figure 2, which shows the back plate, and the three-dimensional shape is formed by lines connecting the numbers 1 and 10, 2 and 20, 3 and 30, and 4 and 40. The thickness of the plates is not important, so it is not included in the figure. Figure 3 is a superposition of Figures 1 and 2, and shows that the trapezoids in the front and back are upside down and that the heights of the upper bases are different. [Industrial Applicability]

[0014] Eliminating as much sound-absorbing material as possible to absorb internal standing waves and reducing production difficulty will reduce costs and be environmentally friendly. [Explanation of symbols]

[0015] 1 The top left vertex of the board in front when viewed from the front. 2 The top right vertex when looking at the board in front from the front. 3 The bottom left vertex when looking at the board in front from the front. 4 The bottom right vertex when looking at the board in front from the front. 10 The top left vertex when looking at the back board from the front. 20 The top right corner of the back board when viewed from the front. 30 The bottom left vertex when looking at the back board from the front. 40 The bottom right vertex when looking at the back board from the front.

Claims

[Claim 1] This speaker enclosure is produced using a 3D printer and is characterized by the fact that when viewed from the front, the front and back shapes are trapezoidal, one of which is upside down and the top bases of each are at different heights.

Images