JPH05344575A - Speaker cabinet - Google Patents

Abstract

PURPOSE:To prevent the generation of unnecessary tones by fixing a speaker unit on a supporting member, supporting the supporting member by a baffle plate through a viscoelastic substance and supporting the supporting member by a speaker enclosure through springs. CONSTITUTION:The speaker unit 3 is fixed on the supporting member 4 and the member 4 is supported by the baffle plate 2 through the viscoelastic substance 6, supported also by the speaker enclosure 1 through the supporting springs 5. Oscillation engergy is transmitted from unnecessary oscillation generated on the unit 3 due to the reaction of sound generation from the unit 3. The oscillation engergy is attenuated by the inertia action of mass of the unit 3 and the member 4 and then attenuated by the elastic action of the springs 5 and the viscoelastic action of the substance 6 to display a synergetic effect. Consequently unnecessary tones are not generated from the enclosure 1 and the plate 2 and tone quality matched with a high request can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hi-fi speaker cabinet.

[0002]

2. Description of the Related Art In recent years, digitalization of music sources has progressed,
Along with this, efforts are being made to reproduce a digitized music source more faithfully in a speaker system as well. Among them, regarding the speaker cabinet,
There is a demand for a silent cabinet in which unnecessary vibration generated in each part of the speaker cabinet as a reaction of acoustic radiation of the speaker unit is minimized.

Next, a conventional example of a speaker cabinet will be described with reference to FIG.

The speaker cabinet of the conventional example has a box-shaped speaker enclosure 10 and a baffle plate 11 provided in the speaker enclosure 10.
The speaker unit 12 attached to the baffle plate 11, the sound absorbing material 13 provided on the outer surface of the baffle plate 11, the sound absorbing material 14 provided inside the speaker enclosure 10, and the network provided in the speaker enclosure 10. 15 and.

In the conventional speaker cabinet having the above structure, when the speaker unit 12 emits sound, the baffle plate 11 absorbs the mechanical vibration of the speaker unit 12 itself due to the reaction of the sound emission, and this occurs. The sound absorbing material 13 absorbs radiated sound caused by the vibration of the baffle plate 11 to prevent unnecessary sound from being radiated.

[0006]

[Problems to be Solved by the Invention]
To meet the high demand for sound quality in the digital age,
Strictly examining the generation of unnecessary sound in the above speaker cabinet of the conventional example has the following problems.

That is, in the above-mentioned conventional configuration, since the speaker unit 12 is rigidly connected directly to the baffle plate 11 with screws or the like, when the speaker unit 12 emits sound, a speaker generated by a reaction of sound emission occurs. The mechanical vibration of the unit 12 itself is directly transmitted to the baffle plate 11. The transmitted mechanical vibration is attenuated by the elastic action of the baffle plate 11, but the mechanical vibration of the baffle plate 11 is unavoidable, and the mechanical vibration of the baffle plate 11 causes the speaker enclosure 10 as well. Vibrate,
There is a problem in that this vibration causes unnecessary sound from the baffle plate 11 and the speaker enclosure 10 and deteriorates the sound quality of the speaker. Further, the baffle plate 11
The baffle plate 1 is attached to the sound absorbing material 13 provided on the outer surface of the
1 has the effect of absorbing unnecessary sound radiated from the baffle plate 11 by mechanical vibration and preventing unnecessary sound emission by this route, but from the speaker unit 12 to the outer surface of the baffle plate 11 via the baffle plate 11. There is a problem that mechanical vibration is transmitted to the provided sound absorbing material 13, and the mechanical vibration vibrates the sound absorbing material 13 itself, and unnecessary sound is generated from the sound absorbing material 13 itself.

An object of the present invention is to solve the above problems and provide a speaker cabinet in which unnecessary sound is not generated from the speaker enclosure and the baffle plate.

[0009]

In order to solve the above-mentioned problems, the speaker cabinet of the present invention has a speaker unit attached to a support member, and this support member is supported by a baffle plate through a viscoelastic body and a spring. It is characterized in that it is supported by the speaker enclosure via the.

[0010]

In the speaker cabinet of the present invention, the speaker unit is attached to the support member, and the support member is supported by the baffle plate via the viscoelastic body and also supported by the speaker enclosure via the spring. That is, since the speaker unit and the support member are flexibly supported by the viscoelasticity of the viscoelastic body and the elasticity of the spring, the vibration energy generated in the speaker unit when the speaker unit emits sound is generated by the speaker unit and the support member. However, most of it is consumed and attenuated in balance with the inertia due to the mass of the speaker unit and the supporting member, and further, the vibration energy transmitted to the baffle plate via the viscoelastic body and to the speaker enclosure via the spring. The transmitted vibration energy is attenuated by viscoelasticity and elasticity to be extremely weak, and the vibration energy transmitted to the baffle plate and the speaker enclosure is extremely weak enough not to generate unnecessary sound. Unnecessary sound radiated from and is required for advanced sound quality in the age of music sources and digitalization It can be prevented to fit.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG.

FIG. 1 is a sectional view of an embodiment of the speaker cabinet of the present invention.

In FIG. 1, the speaker cabinet of this embodiment is a box-shaped speaker enclosure 1
And a baffle plate 2 provided on the front surface of the speaker enclosure 1 and an inner cabinet 4 (supporting member) to which the speaker unit 3 is attached. The inner cabinet 4 (supporting member) has a viscoelastic body 6 interposed therebetween. It is supported by the baffle plate 2 and also by the speaker enclosure 1 via the spring 5.

In the speaker cabinet of this embodiment constructed as described above, a voice coil (not shown) in the speaker unit 3 is emitted when the speaker unit 3 emits sound.
The vibration of the speaker unit 3 vibrates, and the vibration vibrates the inner cabinet 4 (support member) to which the speaker unit 3 is attached. However, in this case, since the inner cabinet 4 (support member) is supported by the baffle plate 2 via the viscoelastic body 6 and by the speaker enclosure 1 via the support spring 5, the inside of the speaker unit 3 is not supported. When the vibration due to the reaction of the acoustic radiation of the voice coil (not shown) is transmitted to the baffle plate 2 and the speaker enclosure 1 through the inner cabinet 4 (support member), the viscoelastic body 6, and the support spring 5, First, the vibration energy is attenuated by the inertial action of the mass of the inner cabinet 4 (support member) (in this case, the larger the mass of the inner cabinet 4 (support member), the greater the effect. } Furthermore, since it is damped by the viscoelastic action of the viscoelastic body 6 and the elastic action of the support spring 5, {in this case, the mass of the inner cabinet 4 (support member) and the viscoelastic strength and support of the viscoelastic body 6}. In a state in which the elasticity of the spring 5 is balanced and the inner cabinet 4 (support member) can be stably supported at a predetermined position, the smaller the strength of the viscoelastic body 6 and the support spring 5, and the loudspeaker unit. The larger the mass of 3 and the inner cabinet 4 (support member), the greater the effect. }, The energy of vibration reaching the baffle plate 2 and the speaker enclosure 1 becomes extremely small, and generally, the mass of the baffle plate 2 and the speaker enclosure 1 is smaller than the mass of the speaker unit 3 and the inner cabinet 4 (support member). Since the vibration is large, the vibration of the baffle plate 2 and the speaker enclosure 1 is extremely weak to the extent that unnecessary sound is not generated, and the unnecessary sound is not generated from the baffle plate 2 and the speaker enclosure 1.

On the other hand, the unnecessary sound emitted from the surfaces of the support spring 5 and the viscoelastic body 6 due to the vibration is small, and this slight unnecessary sound is also shielded by the baffle plate 2 and the speaker enclosure 1 and radiated to the outside. Therefore, the sound quality of the speaker cabinet of this embodiment is very good.

Incidentally, the speaker cabinet of the present invention is not limited to the above embodiment, but various modes are possible. For example,
In the present embodiment, the speaker unit 3 is attached to the box-shaped inner cabinet 4, but the support member is not limited to the box type and a support member designed in an arbitrary shape can be used.

[0017]

According to the speaker cabinet of the present invention, the speaker unit is attached to the supporting member, and the supporting member is supported by the baffle plate through the viscoelastic body and the speaker enclosure by the spring. The vibration energy transmitted from unnecessary vibration generated in the speaker unit due to the reaction of the sound generation is first attenuated by the inertial action of the mass of the speaker unit and the support member, and further, the elastic action of the support spring and the viscoelasticity of the viscoelastic body. It has a synergistic effect of attenuating by action, and unnecessary vibration transmitted to the speaker enclosure and the baffle plate is extremely small, so no unnecessary sound is generated from the speaker enclosure and the baffle plate, and the sound quality in the music source / digitalization era is improved. This has the effect of obtaining sound quality that meets high-level requirements.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a sectional view of a conventional example.

[Explanation of symbols]

 1 Speaker Enclosure 2 Baffle Plate 3 Speaker Unit 4 Inner Cabinet (Supporting Member) 5 Support Spring 6 Viscoelastic Body

Claims (1)

[Claims] 1. A speaker cabinet in which a speaker unit is attached to a support member, and the support member is supported by a baffle plate via a viscoelastic body and is supported by a speaker enclosure via a spring.