JP2003134583A - Speaker system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a speaker system with excellent sound quality at a low cost by eliminating spurious vibration or interference of vibration caused on a baffle board. SOLUTION: The speaker system has a cabinet, a baffle plate board at a cabinet front face, and the baffle board is provided with a speaker unit. The speaker unit is fixed inside the cabinet and a flange provided to a frame outer circumference of the speaker unit is fitted to a hole made on the baffle plate. Then a gel viscoelastic substance is filled in a gap between the flange and the hole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker system used for audio equipment and the like.

[0002]

2. Description of the Related Art Conventionally, as such a speaker system, a speaker system having a speaker unit attached to a front surface of a cabinet is generally used. FIG. 3 is a side sectional view showing an example of such a conventional speaker system. In the figure, reference numeral 1 is a box-shaped cabinet, and a speaker unit 2 is attached to a baffle plate 1a forming the front surface portion.

Specifically, the baffle plate 1a has an opening hole 1a smaller than the outer diameter of the frame 2a of the speaker unit 2.
a is opened, and the speaker unit 2 is inserted into this from the front. The flange 2aa on the outer peripheral portion of the frame 2a is screwed to the baffle plate 1a with a fixing screw 3, whereby the speaker unit 2 is fixed. Such a structure is generally used.

Here, the first item required for the speaker cabinet is to have an airtight structure, but in general, the plane accuracy of the mounting flange portion and the baffle surface of the speaker frame is poor, so that sufficient confidentiality is maintained. In order to obtain these, it is essential to interpose packing (not shown) made of rubber or foam between them. Further, it is necessary to screw the speaker unit to the baffle plate with a large tightening force.

[0005]

However, the screwing of the speaker unit with such an excessive force is one of the causes of the distortion of the speaker unit, which deteriorates the sound quality and, in the worst case, causes the speaker failure. It is also a cause of. On the other hand, the vibration generated in the speaker unit is transmitted to the baffle plate mechanically coupled via the flange, causing unnecessary vibration on the baffle surface and generating unnecessary sound waves. Furthermore, the vibration generated in the speaker unit is also transmitted to another speaker unit (not shown) attached to the baffle plate, causing mutual vibration interference between the units, resulting in acoustic distortion. It is also a major cause of sound quality deterioration.

In view of these problems, the present invention improves the speaker unit mounting structure, which is a drawback of the conventional example, and eliminates unnecessary vibrations and vibration interference generated in the baffle plate, which is inexpensive and has excellent sound quality. The present invention aims to provide a speaker system.

[0007]

In order to achieve the above object, according to the present invention, there is provided a speaker system having a cabinet and a baffle plate provided on the front surface of the cabinet, and a speaker unit provided on the baffle plate. , Fixing the speaker unit inside the cabinet,
A flange provided on an outer peripheral portion of the frame of the speaker unit is fitted in an opening hole formed in the baffle plate.

Further, in the gap between the flange and the opening hole,
It is characterized by being filled with a gel-like viscoelastic substance.

Further, the magnetic circuit portion of the speaker unit is fixed to a support plate extending from the inner wall of the cabinet.

Further, the height of the outer edge portion of the flange is 1/5 or more of the thickness of the baffle plate.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view showing a speaker system according to an embodiment of the present invention.
In the figure, 1 is a box-shaped cabinet, and a speaker unit 2 is attached to a support plate 1b provided inside the cabinet 1. Specifically, the support plate 1b extends above the bottom surface of the cabinet 1, and the rear end of the magnetic circuit portion 2b of the speaker unit 2 is screwed to the front surface with a fixing screw 4. The support plate 1b may be fixed to the inner surface of the cabinet 1. Further, other speaker units are not shown in the figure.

On the other hand, the frame 2a of the speaker unit 2
A rising portion 2ab extends in the speaker thickness direction at the outer edge portion of the flange 2aa provided on the outer peripheral portion. And the baffle plate 1 that forms the front surface of the cabinet 1.
An opening hole 1aa, which is slightly larger than the outer diameter of the frame 2a of the speaker unit 2, is formed in a, and a flange 2aa on the outer peripheral portion of the frame 2a is fitted into the opening hole 1aa.

A gel-like viscoelastic substance 5 is filled in the gap between the flange 2aa and the opening hole 1aa, so that the cabinet 1 has an airtight structure. At this time, the rising edge 2ab causes the outer edge of the flange 2aa and the opening hole 1aa.
The overlap area with and is expanded, and the structure is such that confidentiality is further enhanced. In particular, when the speaker unit 2 reproduces the low range or the middle range,
The height of the rising portion 2ab is preferably ⅕ or more of the thickness of the baffle plate 1a.

In the above structure, there is no mechanical coupling between the speaker unit 2 and the baffle plate 1a, and the vibration of the speaker unit 2 is not transmitted to the baffle plate 1a. It is possible to minimize the deterioration of sound quality due to the vibration of 1a. Further, the degree of airtightness of the cabinet 1 does not depend on the dimensional accuracy of the speaker unit 2 and the baffle plate 1a in the thickness direction at all,
It becomes possible to keep good condition. Furthermore, the flange 2aa
Since it does not apply excessive force to the
There is no deterioration in sound quality due to distortion of the frame 2a and no speaker failure due to deformation of the frame 2a.

FIG. 2 is a graph showing the frequency characteristic of the vibration level in the baffle plate according to the embodiment of the present invention and the conventional example. The horizontal axis of the figure shows the audio frequency (Hz), and the vertical axis shows the vibration speed level (relative value dB). In the figure, a curve a is a graph according to the embodiment of the present invention, and a curve b is a graph according to the conventional example.
As shown in the figure, in the embodiment of the present invention, it is understood that the vibration of the baffle plate is significantly suppressed and reduced as compared with the conventional example.

[0016]

As described above, according to the present invention,
It is possible to provide a speaker system that is inexpensive and has excellent sound quality by eliminating unnecessary vibration and interference of vibration that occur in the baffle plate.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a speaker system according to an embodiment of the present invention.

FIG. 2 is a graph showing a frequency characteristic of a vibration level in a baffle plate according to an example of the present invention and a conventional example.

FIG. 3 is a side sectional view showing an example of a conventional speaker system.

[Explanation of symbols]

1 cabinet 1a baffle board 1b support plate 1aa open hole 2 speaker unit 2a frame 2b Magnetic circuit section 2aa flange 2ab rising part 4 fixing screws 5 Gel-like viscoelastic substance

Claims (4)

[Claims] 1. A speaker system having a cabinet and a baffle plate provided on a front surface of the cabinet, wherein a speaker unit is provided on the baffle plate, wherein the speaker unit is fixed inside the cabinet, A speaker system characterized in that a flange provided on an outer peripheral portion of a frame is fitted into an opening hole formed in the baffle plate. 2. The speaker system according to claim 1, wherein the gap between the flange and the opening is filled with a gel-like viscoelastic substance. 3. The speaker system according to claim 1, wherein the magnetic circuit section of the speaker unit is fixed to a support plate extending from the inner wall of the cabinet. 4. The speaker system according to claim 1, wherein the height of the outer edge portion of the flange is ⅕ or more of the thickness of the baffle plate.