JP2525404Y2 - Speaker system - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure inside a cabinet in a speaker system.

[0002]

2. Description of the Related Art In general, the inside of a cabinet often has a cubic or rectangular parallelepiped shape. In particular, in the case of a wooden cabinet, the top plate and the base plate, or the front baffle and the rear baffle are manufactured in parallel with each other for convenience in mass production.

When such a cabinet is used, a standing wave is generated in the cabinet, which is determined by the size of the parallel surface of the baffle plate and the wavelength of the reproduced sound. Dep occurs.

In order to alleviate this problem, conventionally, as shown in FIG.
Glass wool, cotton, or the like is disposed as the sound absorbing material 3.

[0005] However, this still cannot completely eliminate the adverse effect of the standing wave. For example, as shown in FIG. 4, the rear baffle 2 is so arranged that the surfaces of the front baffle 4 and the rear baffle 2 are not parallel to each other. It was intentionally made diagonal.

[0006]

However, according to this means, a high dimensional accuracy is required in manufacturing the cabinet, for example, the rear baffle must be mounted diagonally, and the material processing is special. , Which hindered mass productivity.

The present invention has been made to solve such a problem, and an object of the present invention is to maintain mass productivity while preventing the speaker mounting surface and the rear baffle from facing each other. Another object of the present invention is to provide a speaker system with improved output frequency characteristics.

[0008]

In order to achieve the above object, the present invention provides a speaker system in which a sound absorbing material is arranged inside a cabinet, wherein the sound absorbing material is formed in a substantially wedge shape, and The sound emitted from the speaker back surface is attached to the rear baffle, the surface facing the speaker mounting surface is inclined, the wide bottom surface is located on the bottom surface inside the cabinet, and the rear surface is in contact with the inner surface of the rear baffle 2. Characterized in that a duct for inverting the phase of the sound absorbing material is formed, and in a speaker system in which a sound absorbing material is arranged inside a cabinet, the sound absorbing material is formed in a substantially wedge shape, and is formed in a rear baffle. The surface opposite to the speaker mounting surface is inclined, the wide bottom surface is located on the bottom surface inside the cabinet, and the rear surface is the inner surface of the rear baffle 2. Is in contact, the sound absorbing material is characterized by a combination of the formation of a duct bent inverting the phase of the sound emitted from the speaker rear, and a plurality of divided molded products.

[0009]

According to the present invention, according to the present invention, the sound absorbing material disposed inside the cabinet is formed of a molded product and has a substantially wedge shape. The sound absorbing material is mounted on the rear baffle and the surface facing the speaker mounting surface is inclined. As a result, the sound wave radiated from the back of the speaker is partially absorbed by this sound absorbing material, the other is reflected, the vibration mode of the reflected sound is also different, the dip at the resonance frequency is reduced,
In addition, a duct for inverting the phase of the sound emitted from the back of the speaker and buffering the standing wave is formed in the sound absorbing material. Further, this sound absorbing material may be made by dividing a plurality of molded products in order to cope with a case where the shape of the duct is complicated.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are side sectional views of the speaker system according to the present invention.

As shown in FIG. 1, a box-shaped cabinet 1 contains a sound absorbing material 5 made of a foamed material such as styrene foam.
Are arranged inside the rear baffle 2. The sound absorbing material 5 has a substantially wedge shape in which opposing surfaces of the front baffle 4 and the rear baffle 2 are inclined. That is, the sound absorbing material 5 has a configuration in which the upper portion is tapered, the bottom surface is wide, the wide bottom surface is located on the cabinet inner bottom surface, and the back surface is in contact with the inner surface of the rear baffle 2. I have. Therefore, it also has an advantage of being easy to assemble.

In the present invention, as described above, the thickness of the rear baffle 2 is gradually increased inside the rear baffle from the top plate side to the base plate side, and the rear baffle 4 is attached to the front baffle 4 on which the speaker 8 is mounted. The sound absorbing material 5 having an inclined plane is integrally attached. As a result, the phase of the sound radiated from the rear portion of the speaker 8 and reflected by the sound absorbing material 5 is different, so that there are few standing waves and the sound quality does not deteriorate. Also, the vibration mode is different, and the dip at the resonance frequency is reduced.

In the present invention, the sound absorbing member 5 is characterized in that a duct for inverting the phase of the sound emitted from the back of the speaker is formed.

That is, the duct uses the resonance of the air inside the cabinet to determine the reproduction limit of the lowest frequency of the low frequency by the resonance.
, A duct 7a for phase inversion is provided. The duct 7a is provided in the sound absorbing material 5 at a position substantially opposite to the rear surface of the speaker inside the cabinet, and the length and the cross-sectional area thereof are appropriately determined depending on the frequency of the bass to be enhanced by resonance. A hole substantially equivalent to the duct 7a is provided at a position corresponding to the duct 7a on the rear surface of the cabinet.
a is open to the outside.

In FIG. 1B, the substantially wedge-shaped sound absorbing material 5 is provided so as to be close to the back of the speaker.
A duct 7b having a collar 9 and a longer sound path is provided.

Further, in the present invention, as shown in FIG. 2, the sound absorbing material 5 is characterized by comprising a combination of a plurality of divided molded products.

That is, as shown in FIG.
In the case where the shape is bent and complicated, the sound absorbing material 5 is divided into two molded products 5a and 5b, molded and combined at the time of assembly, so that a complicated shape can be handled. In this case, the duct 7a is opened at a position slightly deviated from a position inside the cabinet which substantially faces the rear surface of the speaker.

1 (a), 1 (b) and 2
The ducts 7a, 7b. By coating the inner wall of the duct 7c with a synthetic resin or other hardening treatment, the ducts 7a, 7a,
It is possible to prevent resonance in 7b and 7c, and to make them well compatible.

[0019]

According to the present invention, as described above, in a speaker system in which a sound absorbing material is arranged inside a cabinet, the sound absorbing material is formed in a substantially wedge shape and is attached to a rear baffle. Since the surface facing the mounting surface is inclined, and since the sound absorbing material is formed with a duct for inverting the phase of the sound emitted from the speaker rear surface, the sound absorbing material is further divided. By providing a combination of a plurality of molded products, the speaker mounting surface and the opposite surface of the rear baffle are not parallel while maintaining mass productivity, thereby obtaining a speaker system with improved output frequency characteristics. Can be. In addition, in the present invention, the wide wedge-shaped bottom surface is located on the inner bottom surface of the cabinet, and the rear surface is in contact with the inner surface of the rear baffle 2, so that the assembling property is good.

[Brief description of the drawings]

FIG. 1A is a diagram showing a state in which a sound absorbing material having a duct of the present invention is arranged inside a rear baffle, and FIG. 1B is a diagram showing a sound absorbing material provided with a duct having a longer sound path and a rear baffle; It is a figure showing the state where it was arranged inside.

FIG. 2 is a diagram showing a state where a sound absorbing material is divided and arranged inside a rear baffle.

FIG. 3 is a diagram showing a conventional example in which a sound absorbing material is arranged inside a rear baffle.

FIG. 4 is a diagram showing a conventional example in which a rear baffle is inclined with respect to a front baffle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cabinet 2 Rear baffle 4 Front baffle 5 Sound absorbing material 5a Sound absorbing material 5b Sound absorbing material 7a duct 7b duct 7c duct 8 Speaker

Claims (2)

(57) [Scope of request for utility model registration] 1. A speaker system in which a sound absorbing material is arranged inside a cabinet, wherein the sound absorbing material is formed in a substantially wedge shape, and is mounted on a rear baffle so that a surface facing the speaker mounting surface is inclined. The wide bottom surface is located on the bottom surface inside the cabinet, and the rear surface is in contact with the inner surface of the rear baffle 2 to form a duct for inverting the phase of the sound emitted from the rear surface of the speaker. Speaker system. 2. A speaker system in which a sound absorbing material is arranged inside a cabinet, wherein the sound absorbing material is formed in a substantially wedge shape, and is mounted on a rear baffle so that a surface facing the speaker mounting surface is inclined. The wide bottom surface is located on the cabinet inner bottom surface, and the rear surface is in contact with the inner surface of the rear baffle 2, and the sound absorbing material is formed as a bent duct for inverting the phase of sound emitted from the speaker rear surface, A speaker system comprising a combination of a plurality of divided molded products.