JPS6043994A - Loudspeaker cabinet - Google Patents

Abstract

PURPOSE:To raise a vibration suppressing property of a loudspeaker cabinet by laminating a vibration suppressing material on a loudspeaker cabinet base material, and laminating a restriction material on said material. CONSTITUTION:A loudspeaker cabinet is assembled to a box type by a cabinet base material (a lauan plywood) 1. A sheet-like vibration suppressing material 2 is stuck to the inside of five surfaces except a loudspeaker installing surface. Also, an iron sheet 3 is stuck as a restriction material onto the vibration suppressing material 2. As for the base material, wood, thermoplastic resin, thermosetting resin, metal, high elastic fiber reinforced plastic, resin concrete, etc. are used. As for the vibration suppressing material, that which has a large loss against vibration, such as rubber, thermoplastic resin, thermosetting resin, etc. is used. As for the restriction material, an iron sheet, an aluminum sheet, a wooden plate, etc. are used. Also, a plate to which a network is installed can be used as the restriction material, as well.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker cabinet with excellent vibration damping properties.

In general, loudspeaker cabinet materials are required to be heavy and IWE materials, while also being required to have a loss comparable to 4fr.

Conventional cabinet materials include: (a) Wood (single wood or plywood) (b) Aluminum, a combination of these metals (c) ILHIZ vinyl resin, AB S IM! Thermosetting resins such as thermoplastic resins, phenolic resins, and epoxy resins are used.

(B) (Rice 1 satisfies the above two requirements to some extent,
In addition, it is common because it is relatively inexpensive, and the loss against vibration is still insufficient, so methods such as attaching reinforcing bars or reinforcing bodies have been used to damp plate vibration. In addition, (b) and (c) (abrasive baldness) are not common, and both materials have a small loss against vibration, and a sufficient noise suppression effect cannot be obtained.

An object of the present invention is to provide a beaker gear 1 nine that has excellent pain relief properties.

In this investigation, m'
Based on IJ: ], the vibration damping side that is emitted is laminated, and a 13-layer structure is further layered on top of that.

In addition to wood (single wood or plywood), thermoplastic PR resin, and thermosetting resin, the cabinet base material in the present invention may preferably be wood (single wood or plywood), thermosetting resin, or resin having higher elasticity than these materials.
Highly elastic fiber-reinforced plastic made by laminating thermosetting resin in a predetermined shape using metals such as lead, aluminum or alloys thereof, high elastic fibers as reinforcing materials, a mixture of fine filler and aggregate. There are so-called resin concretes 1, 1-1-, etc., which are made by molding and curing a liquid thermosetting resin into a predetermined shape.

The above-mentioned high-modulus fiber-reinforced plastic cabinet sample is made by placing woven or non-woven fabric of high-modulus fibers on the mold.
This is impregnated with a mixture of a thermosetting resin, a catalyst, and an accelerator to form the first layer. resin,
A second layer is formed by impregnating a mixture of a catalyst and a promoter, and the same operation is repeated to form multiple layers. Highly elastic fibers include glass fibers, carbon fibers, silicon carbide fibers, alumina fibers, boron/tungsten fibers, and aromatic polyamide fibers (aramid fibers), and thermosetting resins include unsaturated polyester resins, There are epoxy resins, phenols, i- and θ-fats, etc.

The above-mentioned resin concrete cabinet base material is made of a thermosetting branch (1), a curing bleaching medium added as necessary, an accelerator f (i), a fine filler and aggregate (gravel, etc.);
f, l+l sand) and stir well, then! 1□
Fill the inside of the hole (drive-in method) or use the male 1i
The sushi is made with a trowel on a H14 piece, and after hardening, it is taken out of the mold. There are car-hai l-masu, carbonate cal/ram-so, slate powder, oxidation, leno, 1 minute t, v, and thermosetting resins include unsaturated polyester resin, epoxy/1. There are r', fat, phenol white clothes, etc.

Typical examples of the Young's modulus and 1;

The restraint material used in the present invention is a steel plate, an aluminum plate, a wooden plate (veneer or composite), a plastic plate, a high-elastic h
>'t f (Ii reinforced plastic plates, resin concrete plates, etc.)

The damping material in the present invention includes one containing rubber such as nitrile-butadiene copolymer, styrene-butadiene copolymer, butyl rubber, neoprene, urethane, or vinyl cyclide, vinyl chloride, etc. 1.Those whose main component is a thermoplastic resin such as cypress vinyl copolymer, vinyl acetate, ethylene-vinegar vinyl copolymer, etc.
Although there are those mainly composed of thermosetting resins such as epoxy resins, polyester resins, and phenolic resins, nitrile lulph tannin copolymers, which have a large loss coefficient of these viscoelastic materials themselves, are preferable. , butyl rubber, 1'in! hinyl chloride, hinyl chloride-vinyl acetate copolymer, unsaturated polyester resin, vinyl ester nanocomb or 1-l (vibration control mainly composed of fats, or vibration damping mainly composed of mixtures of these combs or resins) Shrine 9
) It's delicious.

These main components can contain a filler as a means to increase the energy loss due to the internal It'Ii< of the viscoelastic material which is the main component and increase the loss coefficient. Large scale-like mica, graphite, carbon flank, magnesium oxide, zinc ^° (preferable) at the interface with the viscoelastic substance.

Furthermore, in view of the processability of the viscoelastic substance and the temperature characteristics of the loss coefficient, it is necessary to add a plasticizer, a softener, etc.

Examples of the present invention will be specifically described below.

Each of the compounds blended in the proportions shown in Table 1 was made into a sheet and pressed under the following conditions to obtain a sheet-shaped vibration damping material with a thickness of 3 mm. This sheet-like damping material was cut into pieces of 150 mm in length, and 25 mm was cut using the 4-line method.
℃, 5 (loss factor at 10 Hz, tan δ was determined.

Pressing condition vibration damping 14A 120℃ x 10 minutes (water cooling after pressing) Damping material B 140℃ x 30 minutes i Damping material D 150℃ x 10 minutes (note) ■, damping +/lA Plasticizer D Dioctyl phthalate stabilizer: Epoxidized soybean oil 2, damping material C Vulcanized All: Phenol phono 1/A anno ihl'a
Fat: I lr'l IjAlso;ill I) Curing catalyst: Bennyl peroxide [Example 1] In the 11th-1, a box shape was formed by six sheets of lauan (1) with a thickness of 20. Assemble the cabinet and take the speakers inside the other 5-1 thickness, except for the "I m++1"
Paste 1J of notebook-shaped imitation materials (2) (damping material B) on each sheet, and then apply 1 to 1 of these sheet-shaped vibration damping materials (2). , II 1.8mm steel plates (3) were pasted on each side to give a 1.5mm diameter.

Lauan plywood of this example, damping material and V, plate 311"
Loss coefficient of (25°C, 10'OHz) and O Young's modulus 11.1+: !lυl 1) When measured by the -1- method, j1i lapse coefficient (ladδ) 0.087 Yank 4
< ((line/(+7) 3.6 X 1010
Met.

[Actual) Pond: Column 2] ・As shown in Figure 52, in Example 1, a single-digit control 444 sol (2 Add network element (4) to 1' of (1)! 1 H"t network 4
I pasted the strip (5) on it.

In this embodiment, a network board is used as the restraining material.

[Example 3] to [Example 4] In Example 1, the thickness of the cabinet base material, Mukai 1i and material Ne': [ was changed, and the loss coefficient and Young's coefficient of the sample were cut to the same dimensions as in Example 1. The rate was measured under the same conditions.

[Example 3] Glass fiber reinforced plastic] OmmHill vibration material A,: 3 mm Iron plate 0.8 mm Loss coefficient (tan δ) 0.1] Young's modulus (dyne/c11) 5.5 X 101
0 [Example 4] Zinc 5 rtrm Damping material A; 3-shell steel plate 0.8 mm Loss coefficient (tan δ) o, o52 Young's modulus (dyne/cri) 2.6 X 10"
In addition, in [Example 1] to [Example 2], 1111
1! ＋〜・1 question and restraint 1 does not mean that you have to stick it on every inch of the cabinet, but you can stick it only on the required surface that is likely to cause board vibration. The present invention is often applied to cabinets such as ``j 0 j:'; which can be pasted on the speaker mounting surface, or 1'' where it can be pasted around the speaker.
We layered the newly developed damping material as "j, material to sound", i'i, III ; Since it is composed of one three-layer structure, it is possible to provide a speaker cabinet with excellent vibration damping properties.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the structure of one embodiment of the speaker cabinet of the present invention, and FIG. 2 is a diagram showing the structure of another embodiment of the same. '+, lf+t'l: j l'1: request) (Ministry of Ongyo Co., Ltd. 11.1 revision Applicant: Yokohama Rubber Co., Ltd.?J Representative Patent Attorney Sato Yata Part 1 Figure 2

Claims (1)

[Claims] 1. Vibration damping (where 1 is i
L'i layer, and a restraining material (1'1 layer) on top of this damping material. -1-1) Loop tannin copolymer, styrene phtanoene copolymer, butyl copolymer, offbrane copolymer, and offbrane copolymer are urethane.
, -0'I-Speaker cabinet l- as claimed in claim 1; "E merger, vinyl acetate, ethylene-I'lll'iZhinylj)7
431, wherein the thermosetting resin is an epoxy resin, a polyester, etc. (◇J fat or phenol 1 month (I) is the first claim of the patent claim, the speaker key\, vignette. 5. The network element is attached to the restraining material. A speaker cabinet according to claim 1.