JPH01289398A - Speaker device - Google Patents

Abstract

PURPOSE:To prevent an unnecessarily radiated sound from occurring by composing a cabinet including a baffle plate of a vibration proofing aluminum alloy. CONSTITUTION:Either of an Al-Ni based alloy including 4 to 10weight% of Ni or an Al-Si based alloy including 8 to 20weight % of Si constitutes a cabinet 1 including a baffle plate 1a. The vibration proofing aluminum alloy is used as a constituting member in such a way. Thus, the generation of the unnecessarily radiated sound from respective components can be suppressed by increasing an internal loss while the components themselves are being maintained at high rigidity.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to anti-vibration measures for various parts of a speaker device.

[Conventional technology]

Originally, the sound waves emitted from speaker equipment.

It should be radiated only from the vibration system, and a small sword containing unnecessary radiated sound that contains a lot of resonance sound from various parts of the cabinet, interior bass reflex boat, or interior speaker unit is better. Therefore, in conventional speaker devices, various means are employed to eliminate the resonance sound in each of the above-mentioned parts, but these means are individual and diverse.

[Problem to be solved by the invention]

Anti-vibration lighting for each part of conventional speaker devices has been implemented separately for each part as described above, which poses a problem in that it takes time and effort to select the materials to be used and implement the anti-vibration lights.

In order to solve the above problems, it is an object of the present invention to use a common vibration-proofing material with high reversibility and large internal loss as the constituent material of each part that generates unnecessary radiation.

[Means to solve the problem]

In the speaker device of the present invention, the Al-Ni alloy containing 4 to 10% by weight of Ni is 81% to 8% by weight.
All parts of the speaker device are made of Al-E3i3j containing Al-E3i3j containing 20' to 20'Xfi%.

[Effect]

In the speaker device of this invention, the above-mentioned vibration-proof aluminum alloy is used as a constituent material of each part that generates unnecessary radiation, so each part itself maintains high lateralization while increasing internal loss. By doing so, it is possible to suppress the occurrence of unnecessary radiation from each of them.

〔Example〕

An embodiment of this invention will be described below. That is, in Fig. 1(a) and (b), fli is a cabinet of the present invention made of a vibration-proof aluminum alloy (Al-Ni or Al-Si), and eua) is made of the same material. The baffle plate (1b) is a backboard forming the rear surface, which is also made of the same material. +21 is a bass speaker unit that is airtightly mounted on the baffle plate (1a) mentioned above.

(3) is a treble speaker device), (41 is a through hole provided with the baffle plate (jaJK), and (5) is a bass reflex boat with an interior whose one end is inserted and glued into this through hole.

It is made of the same vibration-proof aluminum alloy as the cabinet (1) above.

Next, the composition of the anti-vibration aluminum alloy used in the cabinet and bass reflex boat of the present invention is shown in weight percentage.

Examples (11 and (2)) are Al--Si alloys, and Examples (3) and (4) are Al--Ni alloys.

(Example 1) (Example 2) (Example 3) (Example 4) S
j 10% 8110% N16% Ni 6%
Fe O, 05% Pe Q, 05% Fe 0.05
%Fe O,05%zr o,os% Zr C1
05% Zr O, 05% Zr O, 05% MM0
．． 1st MMo, 1% MM O, 1st section MM 0.
1%Na Q, 002%8n 1lL08% l'R an 0.08%Al remaining hi remaining
AJ In each of the above examples, "MM" is Mitsushmetal, and its composition is 35% La and 0043%.

IJal 5%, Pr 4%, Sm 1%, Y and others 2%.The cause and mechanism of the damping ability of the vibration-proof aluminum alloy of the present invention described above are the boundaries between the second phase particles and the matrix, the grain boundaries and Viscous flow and dislocations at cell grain boundaries
It is thought that vibrational energy is absorbed by micro defects in the crystal such as vacancies and stacking faults.

The above-mentioned damping capacity Ql indicates a measure of converting externally applied vibrational energy into thermal energy.

E: Vibration energy possessed by the vibration system at the beginning of one cycle of microtremor ΔE: Expressed as energy converted into thermal energy during one cycle of imaging.

That is, Example 11 (Al − shown in 21) of the present invention
In the Si-based alloy, when si' is added to Al, 81 particles are precipitated in the Al matrix, forming all eutectic crystals. The interface of the 81 particles, which is the second phase, absorbs vibrations and improves the damping ability ct If.

Further, Fe, Zr #V*T1 and rare earth elements have the function of refining crystals and increasing grain boundaries, and Na and Sr have the function of refining sl grains.

Further, when s,1 is contained as in the above Example (2).

This finely precipitates at the grain boundaries, increasing the stiffness of the two grain boundaries and improving the damping ability.

The preferred ranges (weight percentages) of each component in 21 are as shown in the following [Table 1]. This will cause problems like this.

In addition, in the Al-E11 heavy alloy of Example 11 (21) of the present invention, the second phase particles (84
It is preferable that the average particle diameter of the particles] is 10 μm or less, and by setting it to 10 μm or less, the interface of the second phase particles can be increased and a large damping capacity can be obtained.

Further, it is preferable that the average particle diameter is 7 μm or less, and even more preferably 5 μm or less.

Furthermore, when Ni2 is added to 1M of the Al-Nj alloy of Examples 31 (41) of the present invention, Ni particles precipitate in the Al matrix, forming a eutectic structure.

The interface of the Al3N1 particles, which is the second phase, absorbs the vibration and increases the damping capacity Q-1@.

Mafc'e * zr e V + Ti and rare earth elements refine the bond, increase the grain boundaries, and increase the damping ability Qi.
f Same as above. Furthermore, as in the above embodiment (4).

When Sn is contained, it precipitates finely at the grain boundaries, increases the total viscosity between two grain boundaries, and improves the damping capacity Q-1.

The preferred ranges (weight 5: percentage) of each component in the above-mentioned Example +31 f41 of the present invention are as shown in Table 2 below, and even if it is greater or less than that, the following range R is produced.

In addition, in the Al-Ni alloy of Example 31 (41) of the present invention, the crystal structure has a second phase (Al3N
1 particle] is preferably 10 μm or less, and by setting it to 10 μm or less, the interface of the second phase particles can be increased and a large damping ability can be obtained.

In addition, it is more preferable that the said average particle diameter is 7 micrometers or less, and it is still more preferable that it is 5 micrometers or less.

Next, the Al-Ni alloy of the present invention, the Al-8i alloy and the
The following [Table 3] shows a comparison with 1 (ADO-12) and zn-Al gold alloy trade name: Cosmar 2).

J-11: Shuhaku As is clear from the above [Table 3], the damping capacity Q, 1 is for both the Al-Ni alloy and the Al-134 alloy of the present invention.
It is one order of magnitude larger than AlJADC-+2), and the specific elastic modulus is slightly inferior, but within the almost acceptable range, so the internal loss of the cabinet and bass reflex boat can be significantly increased compared to that of conventional products without reducing rigidity. is possible,
It can be seen that it is an extremely good material for making cabinets and bass reflex boats.

Recently, zn-Al alloy (product name: Cosmar 2
) has been attracting attention, but the two Al-Ni alloys of the present invention,
Al-8i alloy has higher damping ability.

The specific elastic modulus B /p 6 (cd /
5eo2) is also an Al-Ni alloy, Aj'-81
The alloys are larger.

Due to its low specific gravity, it can provide light and highly rigid cabinets and bass reflex boats. The above Zn-Al alloys are A7' (A, DC-12) and the Al-S of the present invention.
It has a problem in corrosion resistance compared to i-based alloys and Al-N1-based alloys.

Note that the concept of the cabinet in the present invention includes the illustrated backboard (1b), and it goes without saying that the same Al-Ni alloy or Al-8i alloy can be used for this backboard as well.

The present invention has been described in detail above in the case where the sources of unwanted radiated sound are cabinets and bass reflex boats, but the same application of the present invention to other sources will be described below.

In other words, Figure 2 shows the above-mentioned vibration-proof aluminum as a constituent material of the bank cover (7) that forms a cavity for filling the sound absorbing material (A) in the back of the pole piece part (6) of the speaker unit. An alloy is used to give the back cover high rigidity while increasing its internal loss to suppress the radiation of unnecessary vibrations from this part. , (91 is the mounting screw for the above bank cover, (ILI is the magnet, αB is the play), (L5 is the frame 2 α3 is the diaphragm, and θ4J is the damper. The conventional back cover is made of aluminum, but is made of synthetic resin. Atsuku.

Figures 3(a) and 3(b) show a case in which a protective cover 09 from external forces is provided to cover the diaphragm a3 of a dome-shaped and horn-shaped speaker unit. It is made of alloy to make this protective cover highly rigid and increase its internal loss, thereby suppressing the radiation of unnecessary vibrations from this part.This protective cover is made of wire mesh as shown in Figure 01. Item 1: Punched metal type as shown in Figure 02 2: Figure 03
An exiband metal-like one, as shown in Figure 0.
It may be a plurality of belt-like plates as shown in 4. In addition, (15a) in the figure is the adhesive on the periphery of the protective cover 05.

σe is the yoke, aη is the spacer, α is the protective cover α
9 is the support ring, fi9 is the equalizer, and ■ is the back cover. Note that conventional protective covers were made of aluminum or synthetic resin.

Figure 4 shows a horn Qυ used in a horn-type speaker unit made of the above-mentioned anti-vibration aluminum alloy, increasing its internal loss while maintaining the rigidity of the horn itself, and eliminating unnecessary vibrations from this part. Conventional horns use aluminum, synthetic resin, or wood to suppress radiation.

Figure 5 shows a cone-shaped speaker unit in which the above-mentioned vibration-proof aluminum alloy ring ■ is inserted and adhered to the outer periphery of the pole piece part (6) of the magnetic circuit through an adhesive (22a). This ring is originally intended to absorb the alternating magnetic field corresponding to the audio signal generated by the voice coil and reduce the adverse effects caused by this. Conventionally, all aluminum was used, but in the case of the present invention, the above-mentioned Since a vibration-proof aluminum alloy is used, the vibration-proofing effect is particularly large, which suppresses the vibration of the magnetic circuit and reduces unnecessary radiated sound emitted through the 7-frame side.

Figure 6 shows a voice coil bobbin 2.4f in a cone-shaped speaker unit made of the above-mentioned anti-vibration aluminum alloy, and while making the voice coil bobbin highly rigid, its internal loss is increased and unnecessary vibrations are radiated from this part. It is designed to suppress the heat and moisture resistance and improve its heat resistance and moisture resistance. Note that conventional voice coil bobbins have been made of paper, aluminum, or synthetic resin.

FIG. 7 shows a weight ring fitted and bonded to the diaphragm side end of a voice coil bobbin in a cone-shaped speaker unit, which is made of the above-mentioned anti-vibration aluminum alloy to increase its internal loss.

In addition to suppressing the radiation of unnecessary vibrations from this part.

This improves heat dissipation from the voice coil. Note that conventional weight rings were made of ethylene butadiene rubber or aluminum.

Figure 8 shows the equalization f-CI of one speaker unit.
! 1 and the frame αa of the other speaker unit and the common baffle plate (1a) to which they are attached? Constructed from the above-mentioned anti-vibration aluminum alloy.

All while maintaining as much rigidity as possible.

The internal loss is increased to suppress the radiation of unnecessary vibrations from these parts, and the molding and mounting operations are simplified.

The above-mentioned equalizer may be an acoustic lens.

In the past, the frame was made of aluminum, and the equalizer was made of aluminum or iron.

The heat dissipation fins (11) polymerized and fixed to the backboard (1b) in Figure 9 are made of the above-mentioned vibration-proof aluminum alloy, and the internal loss is increased to increase the bank board (1b, l). This is intended to suppress the radiation of unnecessary vibrations from this part and improve heat dissipation performance.In addition, conventional heat dissipation fins are made of aluminum.

〔Effect of the invention〕

The speaker device of the present invention generates unnecessary radiated sound as described above. Since the Al-Nj alloy fc of this invention, which has high rigidity and large internal loss, uses a vibration-proof aluminum alloy, which is an Al-Bi alloy, as the constituent material of each part, it maintains a predetermined rigidity. However, the vibration isolation effect in each part can be increased, and the generation of unnecessary radiated sound from each part of the device can be effectively suppressed, especially by using common materials.

[Brief explanation of the drawing]

FIGS. 1(a) and 3(b) are vertical sectional views and front views showing the speaker device of the present invention, and FIGS. 2 and 3(a) (
1)) H Vertical sectional view showing the main parts of the speaker unit of the present invention, Fig. 3 cl, Q2, 05, (1
4 is a plan view of the protective cover of the present invention; FIG. 4 is a cross-sectional view of the horn of the present invention; FIG. 5 is a vertical cross-sectional view of the speaker unit showing the insertion state of the alternating current magnetic field absorbing ring of the present invention; and FIG. 7 is a vertical sectional view of the speaker unit showing the voice coil bobbin of this invention, FIG. 7 is a vertical sectional view of the speaker unit showing the weight ring of this invention attached, and FIG. 8 is a molded state of the equalizer and frame of this invention. FIG. 8 is a vertical cross-sectional view of the speaker device showing the state in which the radiation fins of the present invention are attached. i6 Medium (11 is the cabinet, (1a) is the baffle board. +21 #" CC speaker unit 5) is the bass reflex boat. (6) is the pole piece part, (7) is the puncture cover, α2
is the frame, αJ is the diaphragm, (15 is the protective cover, a9
is an equalizer, on is a horn, @ is a ring, ■ is a voice coil, QQ is a voice coil bobbin, (c) is a weight ring, and (a) is a heat radiation fin. In other figures, the same reference numerals indicate the same or corresponding parts.

Claims (12)

[Claims] (1) A speaker device comprising a cabinet having at least one speaker unit and a baffle plate to which the speaker unit is attached, characterized in that the cabinet including the baffle plate is made of a vibration-proof aluminum alloy. (2) A cabinet having at least one speaker unit and a baffle plate to which the speaker unit is attached, and a bass reflex port provided in the cabinet, characterized in that the bass reflex port is made of a vibration-proof aluminum alloy. speaker device. (3) A speaker device characterized in that a back cover forming a cavity in a speaker unit is made of a vibration-proof aluminum alloy. (4) A speaker device characterized in that a protective cover for a diaphragm in a speaker unit is made of a vibration-proof aluminum alloy. (5) A speaker device characterized in that the horn in the speaker unit is made of anti-vibration aluminum alloy. (6) The ring is fitted around the outer periphery of the pole piece of the magnetic circuit in the speaker unit and is made of anti-vibration aluminum alloy to absorb the alternating magnetic field that corresponds to the audio signal generated from the voice coil. speaker device. (7) A speaker device characterized in that the voice coil bobbin in the speaker unit is made of a vibration-proof aluminum alloy. (8) A speaker device characterized in that the weight ring provided on the voice coil bobbin of the speaker unit is made of a vibration-proof aluminum alloy. (9) A speaker device characterized in that the frame of the speaker unit and the baffle plate are integrally molded from a vibration-proof aluminum alloy. (10) A speaker device characterized in that the frame of the speaker unit, the equalizer or acoustic lens, and the baffle plate are integrally molded from a vibration-proof aluminum alloy. (11) A speaker device characterized in that a radiation fin polymerized and fixed to a cabinet in which a speaker unit is installed is made of a vibration-proof aluminum alloy. (12) Vibration-proof aluminum alloy contains 4 to 1 Ni
The speaker device according to any one of claims 1 to 11, which is either an Al-Ni alloy containing 0% by weight or an Al-Si alloy containing 8 to 20% by weight Si. .