JPH0273797A - Mount base for speaker equipment - Google Patents

Abstract

PURPOSE:To provide a large internal loss and high stiffness to leg poles and to suppress the transmission of vibration to a floor face and the resonance of link rods by adopting a vibration proof aluminum alloy for a part of the link rod of each leg pole and part of plural leg poles with a speaker equipment mounted thereupon. CONSTITUTION:At least a part of leg poles 1 and at least a part of connecting rods 5 are made of a vibration proof aluminum alloy (Al-Ni alloy or Al-Si alloy). The vibration proof aluminum alloy absorbs the vibration energy by the border between a 2nd phase particles and matrix, viscofluidity and transposition at grain particle border cell particle border, void and lamination defect or minute defect in crystal. Thus, the internal loss is increased while keeping the stiffness of the leg poles 1 themselves, the transmission of vibration from the speaker equipment is suppressed and the resonance of link rods and undersired radiation from the leg poles 1 to the floor face are suppressed.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a stand for a speaker device that has the ability to suppress the vibration of a cabinet with the speaker device mounted thereon, as well as the ability to suppress vibration transmission to the floor. It is.

[Conventional technology]

FIG. 2 is a perspective view showing a stand for a conventional speaker device disclosed in Japanese Utility Model Application Publication No. 52-11507g.

In the figure, (1) represents four pillars that support the four corners of the speaker device in a tight state, and (2) represents a connecting rod that connects these four pillars. Each of the pillars above has relatively high density and high rigidity! JT layer reinforcement material, and each connecting rod (2) is made of aluminum material.

[Problem to be solved by the invention]

Since one conventional speaker device is configured as described above, it is difficult to suppress the joint digging of the connecting rods, and there are also problems in that the level of unnecessary radiation from the pillars to the floor is large. Ta.

This invention was made to solve the above problems, and aims to suppress vibration transmission to the floor surface and co-image of the connecting rod by providing a single column with high rigidity and large internal loss. shall be.

[Means to solve the problem]

In the speaker device stand according to the present invention, at least a portion of the pillar and at least a portion of each connecting rod are made of anti-vibration aluminum alloy (At-Ni alloy or At-Ni alloy).
-8i series alloy) [Function] The mounting stand for the speaker device according to the present invention.

Since the above-mentioned vibration-proof aluminum alloy is used for at least a portion of the pedestal and at least a portion of each connecting rod, internal loss is increased while maintaining the rigidity of the pedestal itself, and vibration transmission from the speaker device is suppressed. At the same time, uneasy radiation from the two pillars to the floor and resonance of the connecting rod can be suppressed.

〔Example〕

An embodiment of this invention will be described below. In other words, in Fig. 1, (3) is a wooden board such as particle board, (
4) is a vibration-proof aluminum alloy (At-Ni alloy or At-8% alloy) plate sandwiched and bonded to this bent wooden board, and (5) is a vibration-proof aluminum alloy made of the same material as this alloy plate. Each of the above-mentioned pillars fl+a mutual connecting rod.

Next, the composition of the anti-vibration aluminum alloy used in the pillars and the continuous M construction of the table of the present invention is shown in weight percentage13.Examples 1 and 2 are At-8i alloys, Examples 3 and 4 is a Ni-based alloy. [Table 1] MM"- in the examples is Mitshu metal, and its composition is as follows.

(Composition: La35%! Ce43%, NalS%,
Pr4%.

5IT11% Y and other 2%) By the way, the cause and mechanism of the above-mentioned reduction ability of the anti-vibration aluminum alloy are viscous flow 1 and dislocations at the boundaries between the second phase particles and the matrix, grain boundaries and cell grain boundaries. It is thought that vibrational energy is absorbed by minute defects in the crystal such as vacancies and stacking faults.The above-mentioned damping capacity Q is a measure of converting externally applied vibrational energy into thermal energy.

The preferable range of each component in Examples 1 and 2 is as shown in Table 2 below. .

[Table 2] It is expressed as

That is, in the At-8% alloy shown in Examples 1 and 2 above, when 81 is added to At, 81 particles are precipitated in the At matrix, forming a eutectic crystal. The interface of the 81 particles, which is the second phase, absorbs the vibration, and the damping capacity Q
Improve f.

Also, BNo, zr, v, 'ri and rare earth elements.

Furthermore, KNa has the function of making crystals finer and increasing grain boundaries.
, Sr functions to make the S1 particles finer. Also, when Sn is included as in Example 2 above.

This finely precipitates at grain boundaries, increasing the viscosity between each grain boundary and improving damping ability.

In addition, in the At-8i alloy of Example 1.2,
Regarding the crystal structure, it is necessary that the average particle size of the second phase particles (Si particles) is 10 μm or less, and by setting it to 10 μm or less, the interface of the second phase particles is increased and a large crushing ability is obtained. Can be done. Further, the average particle diameter is preferably 14 m or less, more preferably 5 μm or less.

Furthermore, in the At-Ni alloys of Examples 3 and 4 above, when N1 is added to At, KNi particles in the At matrix precipitate to form a eutectic structure. The particles absorb vibrations and improve the damping ability Q.Also made of Fe.

Zr, V, Ti, and rare earth elements make the crystal iυ, and in the At-Ni alloy of Example 3.4, the average grain size of the second phase (AtslLi jt; 1 child) in the crystal structure is 10 μm. It is preferably less than or equal to 1
By setting it to 0 μm or less, the interface of the second phase particles is increased.
By increasing the damping capacity, a large damping capacity t- can be obtained. In addition, it is more preferable that the average particle diameter is 14 m or less, and 5 m or less.
More preferably, it is less than μm.

Next, the At-N1 alloy with the above composition in the present invention, the Az-8i alloy, and the conventional Az (ADO) work to increase grain boundaries and improve the damping capacity Q.Furthermore, the above-mentioned Example 4 When Sn is contained, as shown in FIG.

The preferable ranges (heavy weight percentages) of each component in Examples 3 and 4 are as shown in Table 3 below, and even more or less results in the following ranges.

[Table 3] -12) and Zn-At alloy (part name, Cosmar 2
) is shown in the following [Table 4].

[Table 4] As is clear from the upper d pi [Table 4], &C damping capacity Q 1
Both the At-Ni alloy and the At-81 alloy of this invention are one order of magnitude larger than KAt (ADO-12).
Also, although the modulus of elasticity is slightly inferior, it is still within the acceptable range, so the rigidity is important! The internal loss of the one-leg column and the connecting rod can be significantly improved compared to the conventional one without dropping.

Recently I have used Zn-Az alloy (song name: Cosmar Z)
However, the At-Ni alloy and Az-8i alloy of this invention have higher damping ability, and the specific elasticity 4E/7 (c1/day θC2), which is proportional to the propagation speed, is also higher than that of the At-Ni alloy and Az-8i alloy of this invention. Since the A4-Ni alloy and the Az-8i alloy have larger specific gravity and lower specific gravity, they can provide light and highly rigid materials.

In addition, Zn-At alloy (trade name, Cosmar 2) is Az (
AuCl3) and the At-5i alloy of this invention, Az
-There is a problem in corrosion resistance compared to Ni-based alloys.

By the way, in the above embodiment, it was clarified that the one-leg pillar was made of a ramrod with anti-vibration aluminum used in a part of it, but the one-leg concrete may be made of an anti-vibration aluminum alloy, and the connection A vibration-proof aluminum alloy similar to the above may be used for part or all of the rod.

Further, in the embodiment, a case is shown in which four pillars and four connecting rods are used, but the present invention is not limited to these four.

〔Effect of the invention〕

Since one of the speaker devices of the present invention is constructed as described above, it is possible to reduce the transmission of vibration to the floor by n times while maintaining the rigidity of the pedestal, and also to reduce the transmission of vibrations to the floor surface by a factor of n, and to reduce the amount of vibration transmitted between the connecting rods and between the pedestals. This has the effect of preventing the transmission of power.

[Brief explanation of the drawing]

Claims (1)

[Claims] A stand for a speaker device, characterized in that at least a portion of a plurality of pedestals on which the speaker device is placed and at least a portion of a connecting rod of each of these pedestals are made of a vibration-proof aluminum alloy.