JP5557117B2 - Speaker device - Google Patents

Description

  The present invention relates to a speaker device capable of reproducing sound with good sound quality.

  In a speaker device composed of a speaker unit and a housing (enclosure), there is a concept that the vibration (box sound) of the housing accompanying the vibration of the speaker unit deteriorates the sound quality, and this is the conventional dominant concept. For this reason, the conventional housing | casing was comprised by the solid wooden veneer, the plywood, etc. Although it was firmly constructed to prevent vibration of the casing, the effect was not sufficient. For this reason, in order to suppress the vibration of the housing, the speaker unit is fixed to the housing through various vibration isolating materials, or the speaker unit is pressed against the housing by various vibration isolating materials. I have been.

  Conventionally, as a vibration isolating material and a vibration isolating method that have been used, a speaker unit is pressed against a baffle plate by an elastic body having rigidity. (See Patent Document 1)

  In addition, the speaker unit is sandwiched between the front elastic mounting frame and the back elastic mounting frame and attached to the housing. (See Patent Document 2)

  In addition, it is indirectly supported by the enclosure through a cushioning material such as neoprene rubber or butyl rubber. (See Patent Document 3)

  Further, a speaker mounting device is used in which a cylindrical body having elasticity is externally fitted to the magnet portion of the speaker, and the elastic body is inserted between the cone portions of the speaker. (See Patent Document 4)

  Further, the vibration isolator is present between the support member supported from the back side of the speaker unit and the case, and the vibration isolator is present between the front surface of the speaker unit and the case. , By elastomer, felt, cotton, sponge, air cap, polyurethane such as sorbosein and alpha gel. (See Patent Document 5)

  In addition, the front cushioning material and the rear cushioning material of the speaker unit are arranged, and the mounting structure is configured to be capable of adjusting the force to pressurize each cushioning material. As the cushioning material, adhesive gel-like polyurethane, or A soft resin material such as gel silicon rubber is used. Alternatively, it may be an elastomeric thermoplastic resin having elasticity. (See Patent Document 6)

  It is also a speaker unit consisting of a frame supported via a vibration buffer, and the vibration buffer is made of gel, gel, liquid, gas, foamed resin, anti-vibration rubber, foam rubber, sponge, etc. that have excellent vibration damping effects. Use soft materials. (See Patent Document 7) and the like have been proposed.

  The above-mentioned various anti-vibration materials are intended to use elastic rubber or soft materials in order to suppress the vibration of the rigid body constituting the casing in any case, and are soft elastic bodies. Alternatively, it is an important requirement as a vibration-proof material to be a soft material made of these materials.

Microfilm of Japanese Utility Model No. 54-142433 (Japanese Utility Model Application No. 56-60381) Microfilm of Japanese Utility Model No. 52-96870 (Japanese Utility Model Publication No. 54-23720) Microfilm of Japanese Utility Model No. 62-140251 (Japanese Utility Model Application No. 64-44783) Microfilm of Japanese Utility Model No. 51-150521 (Japanese Utility Model Publication No. 53-66932) Japanese Patent Laid-Open No. 2002-232983 JP 2009-16946 A JP 2011-24056 A

  In general, a material having a high rigidity has a small internal loss, and easily transmits an elastic vibration wave by a strong rebound resilience. Therefore, in order to suppress the vibration caused by the speaker unit, fixing the speaker unit to a strong rigid material or installing a vibration suppression structure in contact with the speaker unit with the strong rigid material is possible. As a result, the energy of vibration generated by is easily transmitted to other parts, making it easy to diffuse and dissipate throughout the casing. In addition, a soft and elastic vibration-proof material such as a rubber elastic body, or a soft and weakly rebounding elastic material, or a soft material having a resilience to an external force has elasticity. Even if it is interposed between the speaker unit and the housing made of a rigid material, resonance due to the elasticity of the vibration isolator is inevitably generated, so that the transmission of vibration energy is blocked in all frequency bands. Can not. In other words, vibration energy generated in the magnetic circuit part of the speaker unit is transmitted to the case due to resonance due to elasticity, and a mechanically weak part in the case structure is vibrated to make a box sound. It is impossible to prevent the occurrence of unnecessary vibration. Furthermore, since the vibration energy that should originally vibrate the diaphragm of the speaker unit is diffused and dissipated to other parts, the vibration energy that should be applied to the diaphragm of the speaker is consumed for ringing, so that the speaker device As a result, the reproduction frequency characteristics deteriorated. A problem to be solved by the present invention is a structure in which vibration energy from a magnetic circuit portion of a speaker unit is not easily transmitted and diffused, and the speaker unit and the speaker unit magnetic circuit portion are supported and fixed to the case, and the speaker device case By suppressing the unnecessary vibration of the speaker and preventing the diffusion and dissipation of vibration energy from the speaker unit in a wide frequency band, it suppresses unnecessary vibration of the housing and has ideal acoustic characteristics with less distortion. The object is to provide a speaker device.

  In order to solve the above-mentioned problems, the inventor changed the conventional idea regarding the installation structure of the speaker unit and the vibration isolating means, and tried to suppress the vibration forcibly with a strong structure, The speaker unit is supported on the housing via a material that is easily deformed by applying an external force and does not return to the original, that is, a plastic or plastically deformable material, instead of constituting a structure. It was found that vibration energy can be effectively blocked by fixing. The plastic or plastically deformable material is composed of a granular material or a mixture of a granular material and a liquid material. By supporting and fixing the speaker unit to the housing by the displacement limiting means via a composition made of powdered granular material or a mixture of powdered granular material and liquid material, the diffusion and dissipation of vibration energy can be effectively prevented in a wide frequency band. Can be fulfilled. The details will be explained anew in the section. It should be noted that the definition of terms used to describe the invention described in any claim is applicable to the invention described in other claims as long as possible in its nature.

(Characteristics of the invention of claim 1)
A speaker device according to a first aspect of the present invention (hereinafter referred to as “speaker device of the first aspect”) includes a diaphragm having a peripheral edge, a frame that supports the peripheral edge of the diaphragm, and an audio signal for the machine of the diaphragm. A speaker unit comprising: a magnetic circuit unit for converting to dynamic vibration;
In a speaker device including a baffle member that separates vibration sounds on the front surface and the back surface of the diaphragm,
The speaker unit is fixed and supported through a granular material or a composition made of a mixture of a granular material and a liquid material.

  According to the speaker device of the first aspect, the audio signal input to the magnetic circuit is converted into mechanical vibration called vibration of the diaphragm. However, in an ideal speaker device, only the diaphragm vibrates. Is required. Therefore, a material that hardly transmits elastic vibration waves is suitable for the structure for fixing and supporting the speaker unit. By constructing a structure to prevent vibration energy from diffusing and dissipating with a plastic material, that is, a plastically deformable granular material or a mixture of granular material and liquid material, between the speaker unit and the housing Is effectively suppressed in a wide frequency band.

(Characteristics of the invention described in claim 2)
The speaker device according to the invention of claim 2 (hereinafter referred to as “speaker device of claim 2”) is configured such that the speaker unit faces upward, and the speaker unit is a granular material or powder. It is supported and fixed to the baffle member via a composition made of a mixture of a granular material and a liquid material, and a structure for vibration suppression is added to the magnetic circuit portion of the speaker unit, and the magnetic circuit portion and the magnetic circuit portion The structure for vibration control is covered with a composition made of a granular material or a mixture of a granular material and a liquid material, and is displaced via a composition made of a granular material or a mixture of a granular material and a liquid material. Fixed and supported by limiting means.

  According to the speaker device of the second aspect, in the speaker device of the first aspect, the support and fixing structure of the speaker unit is simplified by configuring the front surface of the speaker unit to face upward. That is, it is possible to make the structure for supporting the weight of the speaker unit and the magnetic circuit part of the speaker unit the same as the structure for preventing vibration of the magnetic circuit part of the speaker unit that is the source of vibration energy. The majority of the weight of the speaker unit is due to the magnetic circuit part, and since the magnetic circuit part is also a source of vibration energy, the weight support structure and the vibration isolation structure of the speaker unit can be made almost identical. In order to narrow down the transmission path of vibration energy and to construct a structure for preventing the diffusion and dissipation of vibration energy, it is a great feature. Furthermore, a structure for damping vibration is added to the magnetic circuit portion of the speaker unit, and the vibration energy generated from the magnetic circuit portion is reduced by covering with a composition made of a granular material or a mixture of a granular material and a liquid material. Since the efficiency of transmission to the composition made up of the granular material or the mixture of the granular material and the liquid material is improved, vibration energy can be shielded and blocked more effectively. In other words, by adding a structure for vibration suppression to the magnetic circuit section, it becomes possible to strengthen the interaction between the granular material or the composition of the mixture of the granular material and the liquid material, and stronger vibration isolation. An effect is obtained.

(Features of the invention of claim 3)
The speaker device according to the invention of claim 3 (hereinafter referred to as “speaker device of claim 3”) is the speaker device of claims 1 to 2, wherein the mixture of the granular material and the liquid material is oil clay. It is characterized by being.

  According to the speaker device of claim 3, in the speaker device of claims 1 to 2, the composition for supporting and fixing the speaker unit is plastic, that is, plastic, because the mixture of the granular material and the liquid material is oil clay. There is a deformation. Even if the force generated by the vibration generated by the magnetic circuit section of the speaker unit is applied to the oil clay that supports and fixes the magnetic circuit section, the plastic clay, that is, the plastic deformation, the oil clay does not exhibit rebound resilience. Since the transmission is reduced and the vibration between the speaker unit and the housing can be effectively cut off, the box noise of the housing is reduced and the reproduction distortion of the speaker device is also reduced.

  According to the present invention, vibration transmission to the speaker device can be effectively suppressed by fixing and supporting the speaker unit via a composition made of a granular material or a mixture of a granular material and a liquid material. Therefore, the unnecessary vibration of the speaker device housing is greatly reduced.

  Further, since the magnetic circuit portion of the speaker unit is composed of a permanent magnet and a magnetic pole material which is a strong metal material, conventionally, the vibration isolation of the magnetic circuit portion itself has not been regarded as important. However, considering that the voice coil installation position in the center of the magnetic circuit and the dimensional accuracy of the magnetic pole material inevitably include errors, the direction of the vibration force of the speaker unit is assumed to have a slight distribution. The According to the present invention, the loudspeaker unit is fixed and supported via a composition made of a granular material or a mixture of a granular material and a liquid material for vibrations in all directions including the vibration direction of the loudspeaker unit diaphragm. Therefore, distortion in the reproduced sound due to vibration of the speaker unit itself can be reduced.

  Further, the vibration energy generated by the magnetic circuit unit of the speaker unit is effectively blocked from being transmitted to the housing by the composition of the granular material or the mixture of the granular material and the liquid material. Therefore, the energy of vibration generated by the magnetic circuit unit of the speaker unit is transmitted to the diaphragm that should be driven without being dissipated. Therefore, the speaker device can faithfully reproduce the sound that should be reproduced.

  It is a longitudinal cross-sectional view of a speaker unit installation part.   It is a longitudinal cross-sectional view of a speaker apparatus.

(Schematic structure of speaker device)
Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as “present embodiment”) will be described with reference to the drawings. A speaker apparatus shown in FIG. 1 includes a speaker unit 1, structures 2 and 3 for vibration suppression of the speaker unit, constituents 4 and 5, or a mixture of a granular material and a liquid material, and a granular material. Alternatively, the support members 7 and 10 and the speaker unit support member 9 are composed of a mixture of a granular material and a liquid material.

(Structure of the structure for vibration control of the speaker unit)
The structures 2 and 3 for damping the speaker unit have a rod-like member 2 fixed to the center of the rear surface of the magnetic circuit portions 15, 16, and 17 of the speaker unit, and a disk-like member at the tip of the rod-like member. The plate 3 is installed and fixed.

(Structure of a composition made of a granular material or a mixture of a granular material and a liquid material)
In order to support and fix the speaker unit 1, the composition made of the powdery granular material or the mixture of the powdery granular material and the liquid material is in direct contact with the structures 2 and 3 for damping the speaker unit 1 and the speaker unit. use. In the present embodiment, oil clay is used as the composition 4 composed of the powdered granular material or the mixture of the granular material and the liquid material. In addition, sand, soil, calcium carbonate, silica powder, talc, stone powder, resin powder and the like are preferable as the granular material, but are not limited thereto. Further, as the liquid material constituting the mixture of the granular material and the liquid material, a plasticizer for resin, an oil agent, mineral oil, glycerin, a high molecular weight polyol, a liquid polysaccharide and the like are preferable, and as a plasticizer for resin, Diethyl phthalate, dibutyl phthalate, dioctyl phthalate, dioctyl adipate and the like are preferable, but not limited thereto.

(Structure of a composition made of a granular material or a mixture of a granular material and a liquid material)
Although the composition by the granular material of this embodiment or the mixture of a granular material and a liquid material is oil clay, since the shape is indefinite even in the case of other materials, it cannot be used as it is. Therefore, the molded product 5 wrapped with a resin film and shaped into a belt shape is wound around the magnetic circuit portion of the speaker unit 1 and the end portion of the speaker unit supporting member portion 6, and the portion between them is filled with oil clay. . In the case of a granular material, it can be filled similarly.

(Powdered material or holding member of a mixture of powdered material and liquid material)
Since the granular material or the mixture of the granular material and the liquid material in this embodiment is indefinite, it is used after being molded with a resin film, cloth, paper, or the like. In the present embodiment, rod-like members having a length from the magnetic circuit portion of the speaker unit to the speaker unit support member 6 are installed without gaps as these support members 7 and are fixed by the hose band 8 from the outside. .

(Speaker unit installation direction)
The speaker unit in this embodiment is installed upward. By installing upward, the main vibration direction of the speaker unit, the load of the speaker unit, and the load of the speaker device housing are fixed and supported in the same direction, and the structure of fixing and supporting is simplified. The

(Structure of speaker unit displacement limiting means)
In this embodiment type bear, in order to suppress the horizontal displacement of the magnetic circuit portion of the speaker unit 1, displacement limiting means 10, 11, 12 using screws are installed via the oil clay molded product 5. The displacement limiting means 10, 11, 12 are installed on at least two places on the same horizontal plane, preferably three places or more, particularly preferably four places or more at an equal angle.

(Structure of speaker device)
In this embodiment, it is installed in the housing 19 via a molded product 5 made of a granular material or a mixture of a granular material and a liquid material, below the speaker unit installation portion. Further, the frame 18 of the speaker unit 1 is installed on the housing 19 via a molded product 5 made of a granular material or a mixture of a granular material and a liquid material.

  In the speaker device according to the present invention, the vibration of the entire speaker device is greatly reduced by supporting and fixing the speaker unit 1 to the housing through a composition made of a granular material or a mixture of a granular material and a liquid material, It was found that sound reproduction is possible with good sound quality.

DESCRIPTION OF SYMBOLS 1 Speaker unit 2,3,13a, 13b Structure for vibration suppression 4,5 Composition by a granular material or a mixture of a granular material and a liquid material 6.9 Support member 7,10 A granular material, or , A component support member made of a mixture of a granular material and a liquid material 8 hose band 11, 12 bolt, nut 14 speaker unit diaphragm 15, 16 magnetic pole material 17 magnet 18 speaker unit frame 19 housing

Claims (1)

A speaker unit comprising: a diaphragm having a periphery; a frame that supports the periphery of the diaphragm; and a magnetic circuit unit that converts an audio signal into mechanical vibration of the diaphragm;
In a speaker device including a baffle member that separates vibration sounds on the front surface and the back surface of the diaphragm,
The speaker unit is fixed and supported on the baffle member via oil clay, which is a composition of a mixture of a granular material and a liquid material,
And, a structure for damping is added to the magnetic circuit part of the speaker unit,
And the said magnetic circuit part and the structure for the said vibration suppression are covered with the oil clay which is a structure by the mixture of a granular material and a liquid material, and are based on the mixture of a granular material and a liquid material A speaker device, which is fixed and supported by a displacement limiting means via oil clay as a component.

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