JPH079509Y2 - Speaker cabinet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a speaker cabinet capable of suppressing a standing wave by mounting a suppressing plate without disposing a sound absorbing material inside.

<Prior Art> Conventionally, in this type of speaker cabinet, a sound absorbing material such as felt or glass wool is attached to the inside so that the inside surface of the cabinet is covered with a smooth surface of wood or the like so as not to be exposed to prevent the sound wave inside. Although it absorbs the reflected energy, it requires a lot of sound absorbing material, so the cost is high, so as a structure to suppress the generation of standing waves without using sound absorbing material,
There is a cabinet (01) as shown in FIG. 4 in which a restraining plate (02) whose both ends are diagonally fixed with an adhesive (03) is attached.

<Problems to be solved by the invention> Therefore, the conventional speaker cabinet of this type does not use a sound absorbing material, so the cost is low, but as shown by the dotted line in FIG. Was generated at a specific frequency and was detrimental to the playback sound quality.

SUMMARY OF THE INVENTION In order to solve such a conventional problem, an object of the present invention is to provide a speaker cabinet in which a plate for suppressing the generation of standing waves is obliquely attached to at least one end via a vibration loss material. .

<Means for Solving the Problems> The structure of the present invention for achieving the object will be described with reference to FIGS. 1 and 2 corresponding to the embodiments.
The structure is such that a restraining plate (2) is obliquely arranged inside a rectangular cabinet (1), and at least one fixed end (2a) of the restraining plate (2) is fixed via a material (3a) having vibration loss. .

<Operation> Since the present invention has such a structure, the diagonal restraining plate (2) prevents the rectangular space inside the cabinet (1) from having a flat surface for reflecting sound waves.
Since all the inner wall surfaces are arranged at an angle with respect to each other, the sound waves radiated from the speaker (4) of the sound source are sufficiently attenuated inside the cabinet (1) regardless of the sound absorbing material. In addition to being able to prevent waves from being generated, the weight of the restraining plate (2) is a cantilever type or a vibration loss material (3a, 3).
Since it functions as a sound absorbing material floated in b), the energy that generates standing waves can be consumed.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 are views showing a first embodiment of the present invention, in which (1) is a rectangular cabinet, and a restraining plate (2) is obliquely arranged therein. Then, at least one of the fixed ends (2a) is fixed to the inner corners with an adhesive (03) at the other end (2b) via a material (3a) having vibration loss such as felt, for example. It has a holding structure.

FIG. 3 shows another embodiment, both ends (2a, 2b) of the restraining plate (2).
Is a structure in which the suppression plate (2) fixed via the vibration loss material (3a, 3b) is floated by the vibration loss material (3a, 3b). The width dimension of the restraining plate (2) may be about 1/2 of the inner depth dimension of the cabinet (1).

Fig. 5 shows the frequency characteristics showing the acceleration of vibration at the central position of the restraint plate (2). The dotted line shows the conventional example shown in Fig. 4, where peaks due to standing waves occur at 240Hz and 650Hz. However, the diagram (solid line) of the present invention is flat.

Although the embodiments considered to be typical of the present invention have been described above, the present invention is not necessarily limited to only the structures of these embodiments, and the constitutional requirements referred to in the present invention and the purpose referred to in the present invention can be obtained. The present invention can be carried out with appropriate modifications within the scope of achieving the following effects.

<Effects of the Invention> As is apparent from the above description, in the present invention, the obstruction plates arranged obliquely partition the rectangular space inside the cabinet, and the opposing planes for reflecting sound waves are eliminated. Since the reflection inner surfaces are arranged at an angle to each other, the sound wave radiated from the speaker of the sound source impedes the reciprocating reciprocating motion of the sound wave in the traveling direction inside the cabinet even without using the sound absorbing material, so the reflected energy is It can be sufficiently damped to prevent standing waves from being generated, and the vibration loss material supports the weight of the suppression plate and functions as a sound absorber that is cantilevered or floated by an elastic body. It is possible to expect a remarkable practical effect that the generated energy can be consumed.

[Brief description of drawings]

FIG. 1 is a front sectional view (I-I sectional view of FIG. 2) of the present invention, FIG. 2 is a side sectional view, FIG. 3 is a front sectional view of another embodiment, and FIG. 4 is a front sectional view of a conventional example. FIG. 5 shows frequency characteristics of acceleration of vibration in the conventional example and the present invention. In the figure, (1) is a cabinet, (2) is a restraint plate, (2a)
Is a fixed end, and (3a) and (3b) are vibration loss materials.

Claims (1)

[Scope of utility model registration request] 1. A structure in which a restraining plate (2) is obliquely arranged inside a rectangular parallelepiped cabinet (1), and at least one fixed end (2a) thereof is fixed via a material (3a) having vibration loss. And speaker cabinet.