JPS5845236B2 - speaker device - Google Patents

Description

[Detailed description of the invention] This invention relates to an improvement in a speaker device.

In a conventional speaker device, as shown in Fig. 1, a sound absorbing material 3 made of glass wool or the like is directly attached to the inner wall of the speaker box in order to prevent standing waves within the speaker box 1 and promote rapid attenuation of internal sound pressure. I was wearing it.

In Fig. 1, 2 is a reinforcing crosspiece, and 4.5 is a speaker.

According to such a structure, a large amount of sound absorbing material is required in order to achieve the purpose, and even then, the purpose may not be fully achieved.

This invention eliminates the above-mentioned conventional drawbacks by interposing a honeycomb-shaped core between the board constituting the speaker box and the sound absorbing material.

This invention will be explained below with reference to the figures.

FIG. 2 is a longitudinal cross-sectional view of the speaker device of the present invention, and numerals 1 to 5 are the same as those in FIG. 1.

A honeycomb core 6 is fixed to the inner wall of the speaker box 1, and a sound absorbing material 3 is mounted on the core.

FIG. 3 shows this state in an easy-to-understand manner.

That is, the space between the inner wall of the speaker box 1 and the sound absorbing material 3 is divided by the partition walls 7 of the honeycomb-shaped core 6 into a large number of air chambers 8 with the sound absorbing material 3 side open.

With such a structure, it is possible to secure a space between the inner wall of the speaker box 1 and the sound absorbing material 3 inexpensively and easily, and the sound absorbing characteristics can be improved.

Furthermore, since the space between the inner wall surface of the speaker box and the sound absorbing material is divided into small volume cells by a honeycomb-shaped core, the direction of the sound waves generated from the speaker becomes turbulent, which also provides the effect of preventing standing waves. It is.

In the above embodiment, a honeycomb-shaped core was used to ensure a space between the inner wall of the speaker box 1 and the sound absorbing material 3, but the present invention is not limited to a honeycomb-shaped core, and cores of other shapes can also be used. Any shape is applicable as long as a space is secured between the speaker box 1 and the sound absorbing material 3, and the space between the inner wall of the speaker box 1 and the sound absorbing material 3 is divided into a large number of small volume cells.

However, the honeycomb-shaped core is folded before use and is not bulky, so it only needs to be shaped into the specified shape when used, and its shape is extremely resistant to pressing force, so it improves workability during installation. There is an advantage of doing so.

According to the present invention, as described above, it is possible to obtain a speaker device that has a sufficient sound absorbing effect and prevents standing waves by using a small amount of sound absorbing material.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a conventional speaker device, FIG. 2 is a longitudinal sectional view of the speaker device of the present invention, and FIG. 3 is a partially enlarged perspective view of the speaker device of the present invention. In the figures, the same symbols indicate the same or equivalent parts.
1 is a speaker box, 3 is a sound absorbing material, 4.5 is a speaker, and 6 is a honeycomb-shaped core.

Claims (1)

[Claims] 1. In a speaker device in which a sound-absorbing material is arranged in a speaker box, a honeycomb-shaped core is provided between the inner wall surface of the speaker box and the sound-absorbing material so as to open into each of the inner wall surface and the sound-absorbing material. Features speaker equipment.