Patent Translate Powered by EPO and Google Notice This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate, complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or financial decisions, should not be based on machine-translation output. DESCRIPTION JPS54159215 Description 1, title of the invention スピーカボックス 3. Detailed Description of the Invention The present invention relates to a speaker box provided with a box body formed by cutting a hollow cylinder whose both ends are closed in the cylinder direction. A speaker box generally used at present is formed into a rectangular parallelepiped shape by combining and bonding a plurality of flat plates with an adhesive or the like, but considering the occurrence of standing waves in the inside, etc., the shape is not The structure is complicated, for example, to form an equilateral solid shape, and the manufacturing cost can not but be increased significantly. Still as shown in FIG. 1, the speaker cabinet 3 in the two-way speaker system provided with the speaker unit 1 for the low frequency range and the speaker unit 2 for the middle and high frequency range is in the box 3 from each speaker unit 2 Sub-box 3b called a so-called back chamber in the main box 3a in order to ensure that the sound outputs radiated to each other do not interfere with each other and to form a speaker box of a suitable volume for the speaker unit 2 for middle and high frequency range To arrange. The structure of the main box 3a and the sub box 3b must be complicated in consideration of preventing the above-mentioned occurrence of the actual wave. Therefore, the present invention is intended to provide a speaker box with a novel configuration in which standing waves are not easily generated, and EndPage: 1 is also simple in structure and can be manufactured at low cost. Hereinafter, the present invention will be described in detail according to the drawings showing one embodiment. FIG. 2 is a partially broken perspective view of an embodiment in which the present invention is applied to a speaker box for a two-way speaker system. In the embodiment shown in FIG. 2, reference numeral 11 denotes a speaker mounting plate as a so-called front panfull plate, and the low-pitched speaker unit 12 and the mid-high-pitched speaker unit 13 are 02-05-2019 1 fitted and attached to the speaker mounting plate 11 thereof. Each opening 14 and 15 is provided. Further, 16 is a main box main body. The main box main body 16 is formed in a rectangular parallelepiped shape by a general means in which flat plates 17 are combined and joined. And 1B is a sub-box main body which forms a so-called back chamber in the abovementioned main box. As shown in FIGS. 3A to 3C, the sub-box main body 18 suitably has a hollow cylindrical body 21 closed by valley side plates 19 and 20 to which both end portions 21A and 21B are adhered and fixed respectively in a partial direction. It is cut off at an incline. That is, FIG. 3N shows an external perspective view of the hollow cylindrical body 21. The hollow cylindrical body 21 is obtained by cutting a pipe of paper, vinyl chloride plastic, metal or the like into an appropriate length. Become. 3B shows a state in which both end portions 21A and 21B of the hollow cylindrical body 21 are closed by the side plates 19 and 20, and the side plates 19 and 20 are concaves into which the both end portions 21A and 21B are fitted. The strips 19a and 20a are engraved, and both end portions 21A and 21B of the hollow cylindrical body 21 are fitted to the above-mentioned recessed strips 19a and 20a and fixed by adhesive. Then, the hollow cylindrical body 21 whose both end portions 21A and 21B are closed by the side plates 19 and 20 is cut with an appropriate inclination in the partial direction (the cut surface 22 is shown by a dashed dotted line in FIG. 3B). 3), two sub-box bodies 18 of the shape as shown in FIG. 3C are formed at one time. 3- Then, the sub-box main body 18 shaped as shown in FIG. 3C is shown in FIG. 4 by adhesively fixing the contact cross section 22 to the speaker mounting plate 11 so as to surround the opening 15. It's like nok. It forms a chamber. Therefore, in the embodiment as described above, the bank chamber formed by the speaker mounting plate 11 and the sub-box main body 18 has a hollow irregular side solid shape such as a substantially truncated cone divided into two, and further, each side plate Since 19 and 20 have an inclination with respect to the radiation axis of the sound output from the speaker unit 13, generation of a standing wave in the inside is extremely small. Further, since the hollow cylindrical body 21 is used in a pipe shape such as paper as described above, it can be obtained at a very low cost, and it is cut in the direction of its part to be divided into two and the sub-box main body 18 Since it is formed, the back chamber can be formed easily at low cost. In the above embodiment, the sub-box main body 4-18 is formed by cutting the hollow cylindrical body 21 with an appropriate inclination to the partial direction, but the hollow cylindrical body 21 is cut in the partial direction. Even if the hollow semi-cylindrical shape is used as the sub-box main body 18 and the cut surface 22 is adhered and fixed so as to surround the opening portion 15 of the speaker mounting plate 11, generation of standing waves in the back chamber Can be sufficiently prevented. That is, as shown in FIG. 5, even when the back chamber is formed by the sub box main body 18, the speaker unit 13 serving as a sound source is not usually a point sound source, so the inner wall 18a of the sub box main body 18 The distance to the end is not even, and the occurrence of standing waves can be sufficiently prevented. Further, although the sub-box main body molded from the hollow cylindrical body is used in each of the above-described embodiments, it goes 02-05-2019 2 without saying that a hollow polygonal cylindrical body such as a square isotropy or a square angular cylinder may be used. Furthermore, although the present invention is applied to the sub-box forming the EndPage: 2 back chamber in the speaker box for the two-way speaker system in the above-described embodiment, the present invention may be applied to form the main box. As well as being able to prevent the occurrence of standing waves in the box, manufacturing is easy and cost can be reduced. Thus, according to the present invention, it has a box main body formed by partially cutting a hollow cylindrical body whose both ends are closed, and a speaker mounting plate having an opening for mounting a speaker unit. Since the speaker box is formed by bonding and fixing the cut surface of the box main body so as to surround the opening of the speaker unit mounting plate, generation of standing waves in the box is extremely reduced, and manufacture is easy. Provide a low cost speaker box. Therefore, the intended purpose can be achieved sufficiently. 4. Brief Description of the Drawings FIG. 1 is a partially cutaway perspective view showing a conventional example of a speaker box for a two-way speaker system. FIG. 2 is a partially cutaway perspective view of an embodiment of the present invention. FIGS. 3A to 3C are external perspective views of the hollow cylinder, the hollow cylinder closed at both ends, and the sub-box main body used in the above embodiment. FIG. 4 is an enlarged cross-sectional view showing a main part in the above embodiment in an enlarged manner. FIG. 5 is an enlarged longitudinal sectional view showing an essential part of another embodiment of the present invention in an enlarged manner. 11 ............... speaker mounting plate 12, 13 ...... speaker unit 14, 15 ...... speaker unit opening for attaching portions 16, 18, ----- speaker box body 19, 20 ...... side plate 21 ............... hollow cylinder 21A, 21B · · · hollow cylinder opposite ends 22 ··················································································· · [EndPage: 3 Figure 3 / A) No f. FIG. 4 2 () a ,; 5 FIG. 0 EndPage: 4 02-05-2019 3
© Copyright 2021 DropDoc