JP2603443Y2 - Speaker system - Google Patents

Description

[Detailed description of the invention]

[0001]

In this invention, in order to prevent the speaker from directly contacting the baffle plate, the speaker is held by an arm, a support, and a fixed base connected to a magnetic circuit, and vibration from the frame to the cabinet when the speaker is driven is reduced. The present invention relates to a speaker system that obtains a clear reproduced sound by preventing the sound from being transmitted.

[0002]

2. Description of the Related Art Japanese Patent Publication No. Sho 63-42770 is a prior example of the above-described speaker mounting structure. FIG. 8 shows an example of such a speaker system. A woofer 23 is fixed to a baffle plate 21 of a cabinet 20 via a packing 22, and a magnetic circuit 24 of the woofer 23 is fixed to a fixing stand 25. The cabinet 20 having an open bottom is integrated with a packing 26 via a packing 26.

[0003]

In this loudspeaker system, the magnetic circuit 24 is fixed as compared with an ordinary loudspeaker, so that the movement of the magnetic circuit due to the vibration of the baffle plate 21 and the like can be damped. Since the baffle plate 21 and the frame of the speaker are fixed via the packing 22, it is not possible to completely prevent the vibration at the time of driving the speaker from being transmitted to the baffle plate 21. There is a problem that the reproduced sound is transmitted to the magnetic circuit 24 and is not affected by the vibration. Further, when speakers 27 and 28 for high and medium sounds are attached to the baffle plate 21, there is a problem that the vibration also affects these speakers 27 and 28.

This invention has been proposed in view of the above, and its purpose is to suppress the vibration of the baffle plate and prevent the vibration of the baffle plate from being transmitted to the speaker, thereby obtaining a clear sound quality. And also enough
Another object of the present invention is to provide a speaker system capable of reproducing a low tone .

[0005]

SUMMARY OF THE INVENTION This invention is in the speaker system comprising attaching the speaker 4 to the cabinet 1, the acoustic resonant ring 9 provided with the speaker 4 to the baffle plate 2 of the cabinet 1, the aquo
-Stick resonance ring 9 is a large diameter acoustic
A resonance ring 9b is provided with a gap 10
And a small diameter acoustic resonance ring 9b,
The gap 10 corresponds to the lowest resonance frequency f ₀ of the speaker 4 .
The gap 10 is set to resonate at a frequency of 0.5 to 2.0 times.
Length and width are set, and the large-diameter acoustic
An outer peripheral side of the resonance ring 9b is provided on the baffle plate 2.
And the small-diameter acoustic resonance phosphorus
The speaker 4 is provided on the side of the speaker 9b, and a magnetic circuit behind the speaker 4
To achieve the above purpose.
You. Further , the fixing base 8 is brought into contact with the bottom of the cabinet 1, and the fixing base 8 has a higher density than the material of the cabinet 1.

[0006]

According to the present invention , since the baffle plate 2 of the cabinet 1 is completely out of contact with the speaker frame 4a, vibrations generated when the speaker is driven are not transmitted to the cabinet 1 via the frame 4a, and the speaker 4 The vibration of the magnetic circuit is also damped by making the magnetic circuit of FIG. For this reason, only the vibration system of the speaker 4 basically vibrates so that a clear reproduced sound can be obtained. The gap 1 formed by the baffle plate 2 and the acoustic resonance ring 9 attached to the frame 4a.
0 and the minimum resonance frequency f ₀ of the speaker.
By setting the resonance at 5 to 2.0 times, even if there is a gap between the baffle plate 2 and the frame 4a, it is possible to reproduce sufficient bass sound. Further, the fixing table 8 is brought into contact with the bottom of the cabinet 1 , and the fixing table 8 has a higher density than the material of the cabinet 1.
Is absorbed by the fixed base 8 so that only the vibration system of the speaker 4 basically vibrates, so that a clear reproduced sound can be obtained.

[0007]

1 shows a first embodiment of the present invention. In the figure, reference numeral 1 denotes a hollow box-type cabinet, in which a front baffle plate 2 is provided, and a large-diameter acoustic resonance ring 9 b of an acoustic resonance ring 9 is attached to the baffle plate 2. Reference numeral 4 denotes a speaker provided in the opening 3 and its frame 4a is an acoustic resonance ring 9.
The small-diameter acoustic resonance ring 9a is attached. The magnetic circuit 5 of the speaker 4 is in close contact with an arm 6 provided at the rear thereof, passes through a hole g provided at the bottom of the cabinet 1 through a support post 7, and is fixed at a lower portion of the bottom of the cabinet. It is attached to the stand 8.

A fixed base 8 closely attached to the bottom of the cabinet 1
Has a higher density than the material of the cabinet 1. Therefore, by this, the vibration of the cabinet 1 due to the air vibration in the cabinet caused by the vibration of the diaphragm when the speaker 4 is driven is absorbed, and only the vibration system of the speaker 4 vibrates, and other components do not vibrate as much as possible. Like that. In addition, when the material of the cabinet 1 is wood, the density is 0.5 to 1.0,
For example, brass, aluminum, concrete, or the like is appropriately adopted as a material of the column 7 and the fixing base 8.

The acoustic resonance ring 9b attached to the baffle plate 2 is set parallel to the outer periphery of the acoustic resonance ring 9a attached to the frame 4 side, has a gap 10, and There is no direct contact with the baffle 2.

Therefore, when the speaker 4 is driven, the vibration from the frame 4a of the speaker 4 is not directly transmitted to the baffle plate. Therefore, the vibration of the baffle plate 2 which makes the sound quality from the vibration system is extremely small, so that the distortion is small. Clear sound quality can be obtained, and sufficient bass can be obtained. For the bass, the same performance as that of the phase inversion type or the closed type can be obtained by designing the acoustic resonance ring 9 according to f ₀ of the speaker 4 and the weight M _{0 of the} vibration system. Note that, as a matter of course, the speaker 4
Is not directly transmitted to the baffle plate 2, so that even if middle- and high-frequency speakers (not shown) are mounted on the baffle plate 2, clear high-performance sound quality can be obtained from those speakers. .

FIG. 2 shows a second embodiment of the present invention.
This embodiment is different from the first embodiment in that the magnetic circuit 5 of the speaker 4 is wrapped by the arm 6 having the holding portion 6a and is firmly connected to the column 7a. Therefore, the speaker 4 can be more firmly supported. The other configuration is the same as that of the first embodiment.

[0012] Figure 3 is an enlarged view of part A of FIG. 1 and FIG. 2, 0 of the lowest resonance frequency f ₀ of the air gap 10 is the speaker 4.
The length of the gap 10 in the axial direction and the width in the radial direction are set so as to resonate at a frequency of 5 to 2.0 times.

FIG. 4 shows the sound pressure and impedance characteristics of the present invention. a is the sound pressure with respect to the frequency, and b is the impedance. As is clear from this characteristic diagram, bass reproduction does not differ from a normal speaker system.

FIG. 5 shows vibrations of the cabinet 1 of the conventional type in which a speaker is simply mounted inside the baffle plate and that of the present invention, which is not of the type shown in FIG. It shows a comparison, and it can be seen that the present invention has less vibration.

FIG. 6 shows the vibration of the present invention measured by a spectrum analyzer, and FIG. 7 shows the conventional type. It can be seen that the vibration is much more absorbed in the present invention than in the conventional type.

[0016]

[Effect of the invention] According to the invention configured as described above,
A gap 10 is provided between the frame 4 a and the baffle plate 2 by the acoustic resonance ring 9, and the speaker 4 is completely out of contact with the baffle plate 2. Therefore, only the vibration system of the speaker 4 vibrates, and a reproduced sound with clear sound quality can be obtained. Further, to resonate the gap 10 at 0.5 to 2.0 times the frequency of the lowest resonance frequency f ₀ of the speaker, if so determine the length and width of the gap 10, it can be reproduced sufficiently bass . Also the same
Acoustic resonance
By changing the dimensions of the ring 9, bass reproduction can be arbitrarily controlled.
Control. Further, the fixing table 8 is connected to the cabinet 1
If a material having a density higher than that of the material is used, the vibration of the cabinet 1 is also absorbed, and only the vibration system of the speaker 4 vibrates together with the gap 10, and other components do not vibrate, so that a clear sound quality is obtained. be able to.

[Brief description of the drawings]

FIG. 1 is a central longitudinal sectional view of a first embodiment of the present invention.

FIG. 2 is a second embodiment of the above.

FIG. 3 is an enlarged explanatory view of a portion A in FIGS. 1 and 2;

FIG. 4 is a characteristic diagram of sound pressure and impedance according to the present invention.

FIG. 5 is an explanatory view showing a state in which vibrations of a general conventional type and a cabinet of the present invention are measured by a vibration pickup.

FIG. 6 is an explanatory diagram of a state in which the vibration of the present invention is measured by a spectrum analyzer.

FIG. 7 is an explanatory diagram of measurement of a conventional vibration spectrum analyzer.

FIG. 8 shows a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cabinet 2 Baffle board 3 Opening 4 Speaker 4a Frame 5 Magnetic circuit 6 Arm 6a Holding part 7 Support 8 Fixed base 9 Acoustic resonance ring 9a Small diameter acoustic resonance ring 9b Large diameter acoustic resonance ring 9c Flange 10 Gap

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04R 1/02

Claims (2)

(57) [Scope of request for utility model registration] 1. A speaker (4) is mounted on a cabinet (1).
In the speaker system attached, the speaker
(4) to the baffle plate (2) of the cabinet (1)
An acoustic resonance ring (9) is provided,This accor
The stick resonance ring (9) is a large diameter acoustic
Ring (9b) and a gap (10) inside this ring.
A small acoustic resonance ring (9
b), and the gap (10) is provided in the speaker (4).
Lowest resonance frequency f ₀ At 0.5 to 2.0 times the frequency of
The length and width of the gap (10) are set so as to shake, And the large-diameter acoustic resonance ring (9b)
An outer peripheral side is provided on the baffle plate (2).
The small-diameter acoustic resonance ring (9b) side
Is provided with the speaker (4), And behind the speaker
Magnetic circuit fixed via arm (6) and support (7)
A speaker characterized in that it is connected to and mounted on a stand (8).
system. 2. The speaker system according to claim 1, wherein a fixed base is brought into contact with the bottom of the cabinet, and the fixed base is made of a material having a higher density than the material of the cabinet.