JP4747672B2 - Sound insulation structure for vehicle microphones - Google Patents

Sound insulation structure for vehicle microphones Download PDF

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JP4747672B2
JP4747672B2 JP2005150253A JP2005150253A JP4747672B2 JP 4747672 B2 JP4747672 B2 JP 4747672B2 JP 2005150253 A JP2005150253 A JP 2005150253A JP 2005150253 A JP2005150253 A JP 2005150253A JP 4747672 B2 JP4747672 B2 JP 4747672B2
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microphone
vehicle
sound
sound insulation
insulation structure
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JP2006327278A (en
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博之 河野
尚樹 粂野
達実 水野
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Nissan Motor Co Ltd
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Description

本発明は、車両用マイクの遮音構造に関する。   The present invention relates to a sound insulation structure for a vehicle microphone.

従来、車両の車室内にスピーカとマイクを配設し、車室内において乗員同士の会話を補助する技術がある。この技術にあっては、スピーカを車両の後部座席近傍の天井部のヘッドライニングに配設させ、マイクを運転席近傍のピラーやステアリングやインストルメントパネル等に配設させるものがあった。そして、ドライバー等の会話を上記マイクで集音して、後部座席の乗員に聞き取りやすくするためにスピーカで拡声し、乗員同士の会話の補助を行っているものがあった。   Conventionally, there is a technique in which a speaker and a microphone are arranged in a vehicle interior of a vehicle to assist conversation between passengers in the vehicle interior. In this technique, a speaker is disposed on the head lining of the ceiling near the rear seat of the vehicle, and a microphone is disposed on a pillar, steering, instrument panel, or the like near the driver's seat. In some cases, the conversation of the driver or the like is collected by the microphone, and is loudened by a speaker in order to make it easier for the passengers in the rear seats to hear, thereby assisting the conversation between the passengers.

ここで、近年、自動車の構成部品のモジュール化が図られ、上記ヘッドライニングも１つのモジュールとして製造されるようになってきた。このため、車室内会話補助装置も生産性を向上させるために、ヘッドライニング等の１つのモジュールに収納されることが望まれるようになった。   In recent years, modularization of automobile components has been attempted, and the headlining has been manufactured as a single module. For this reason, in order to improve productivity, the vehicle interior conversation assistance device is also desired to be housed in one module such as a headlining.

したがって、上記従来技術にあっては、マイクをスピーカとほぼ同一平面上のモジュール構成のヘッドライニングであるルーフモジュールに配設し、マイクをスピーカが配設されている部材と同じ部材であるルーフモジュールの同一面に配設している。   Therefore, in the above prior art, the microphone is disposed on the roof module, which is a head lining having a module configuration substantially flush with the speaker, and the microphone is the same member as the member on which the speaker is disposed. Are disposed on the same surface.

また、ヘッドライニングにマイクを配設する際には、このマイクの外縁に防振ゴムを設けることにより、ヘッドライニングの振動がマイクに伝達されることを抑制している（例えば、特許文献１参照）。
特開２００１−１０５９８９号公報 Further, when a microphone is disposed on the headlining, vibrations of the headlining are prevented from being transmitted to the microphone by providing an anti-vibration rubber on the outer edge of the microphone (see, for example, Patent Document 1). ).
JP 2001-105989 A

しかしながら上記従来技術にあっては、防振ゴムによってヘッドライニングの振動伝達を抑制するのみであり、車両外部からの音振を遮断または吸収することはできず、例えば雨音などのノイズもマイクに入力されてマイクの拡声音と干渉して聞き取りづらくなる、という問題があった。   However, in the above prior art, the vibration transmission of the head lining is only suppressed by the vibration isolating rubber, and the sound vibration from the outside of the vehicle cannot be cut off or absorbed. There was a problem that it was difficult to hear due to interference with the loud sound of the microphone input.

本発明は上記問題に着目してなされたもので、その目的とするところは、マイクに入力される車両外部からのノイズを低減可能な遮音材を提供することにある。   The present invention has been made paying attention to the above problems, and an object of the present invention is to provide a sound insulating material capable of reducing noise from the outside of the vehicle input to a microphone.

上述の目的を達成するため、本発明では、車両の車室内に設けられた車両用マイクの遮音構造であって、前記車室は、前記マイクの配設部を備えた内壁部材を有し、前記マイクは、前記配設部に配設され、前記内壁部材と車両外壁との間に、前記車両外壁及び前記内壁部材に当接する遮音材が設けられ、前記マイクは、前記遮音材に支持されて前記配設部に配置されていることを特徴とする。

In order to achieve the above-described object, the present invention provides a sound insulation structure for a vehicle microphone provided in a vehicle interior of the vehicle, wherein the vehicle interior includes an inner wall member provided with a placement portion of the microphone, The microphone is disposed in the placement portion, and a sound insulating material that contacts the vehicle outer wall and the inner wall member is provided between the inner wall member and the vehicle outer wall, and the microphone is supported by the sound insulating material. It is arranged in the arrangement part .

よって、マイクに遮音材を設けることで、マイクに入力される車両外部からのノイズを低減可能な車両用マイクの遮音材を提供できる。   Therefore, by providing a sound insulating material on the microphone, it is possible to provide a sound insulating material for a vehicle microphone that can reduce noise from outside the vehicle that is input to the microphone.

以下、本発明を実施するための最良の形態を、実施例に基づいて説明する。   Hereinafter, the best mode for carrying out the present invention will be described based on examples.

［概要］
図１は車両の天井であるヘッドライニング１の斜視図、図２は後部座席における車両天井部分の断面図、図３は拡大断面図である。ヘッドライニング１の後部にはマイク２００を配設するマイク配設孔１１が設けられ、このマイク配設孔１１の鉛直上方から遮音材１００が配設される。車両天井部分における外壁であるルーフパネル２とヘッドライニング１とはブラケット３により接続される。 [Overview]
FIG. 1 is a perspective view of a headlining 1 that is a ceiling of a vehicle, FIG. 2 is a sectional view of a vehicle ceiling portion in a rear seat, and FIG. 3 is an enlarged sectional view. A microphone placement hole 11 for placing the microphone 200 is provided at the rear of the headlining 1, and a sound insulating material 100 is placed from above the microphone placement hole 11. A roof panel 2 that is an outer wall in the vehicle ceiling portion and the headlining 1 are connected by a bracket 3.

遮音材１００は長方形部材であり、ヘッドライニング１に両面テープや接着剤等により固定されてルーフパネル２とヘッドライニング１との間に配設される。本願実施例では両面テープ１２により接着されるものとする。遮音材１００とルーフパネル２及びヘッドライニング１の間に隙間が形成されないよう、遮音材１００はルーフパネル２及びヘッドライニング１と完全に当接して配設される。   The sound insulating material 100 is a rectangular member, and is fixed between the roof panel 2 and the head lining 1 by being fixed to the head lining 1 with a double-sided tape or an adhesive. In this embodiment, it is assumed that the double-sided tape 12 is used for bonding. The sound insulating material 100 is disposed in complete contact with the roof panel 2 and the head lining 1 so that no gap is formed between the sound insulating material 100 and the roof panel 2 and the head lining 1.

遮音材１００は３層構造であり、鉛直上方から順に上層部１１０、中層部１２０、下層部１３０を有する。上層部１１０はウレタン材で形成された制振材であり、ルーフパネル２の振動を吸収する。中層部１２０はゴム材で形成された遮音材であり、上層部１１０と下層部１３０間の振動を遮断する。また、下層部１３０はフェルト材で形成され、吸音・遮音を行う。上述のように、この下層部１３０は両面テープ１２でヘッドライニング１と接着される。   The sound insulating material 100 has a three-layer structure, and has an upper layer portion 110, a middle layer portion 120, and a lower layer portion 130 in order from the vertically upper side. The upper layer part 110 is a vibration damping material formed of a urethane material and absorbs vibrations of the roof panel 2. The middle layer portion 120 is a sound insulating material formed of a rubber material and blocks vibration between the upper layer portion 110 and the lower layer portion 130. The lower layer part 130 is made of a felt material and performs sound absorption and sound insulation. As described above, the lower layer portion 130 is bonded to the headlining 1 with the double-sided tape 12.

なお、上層部１１０は制振材であればウレタン材でなくともよく特に限定しない。同様に、中層部１２０も遮音作用があればゴム材でなくともよいし、下層部１３０も吸音・遮音材であれば材質は問わない。   The upper layer part 110 is not limited to a urethane material as long as it is a vibration damping material. Similarly, the middle layer portion 120 may not be made of a rubber material as long as it has a sound insulation effect, and the material of the lower layer portion 130 is not limited as long as it is a sound absorbing / sound insulating material.

下層部１３０の鉛直下方部分には、マイク２００を嵌合させる凹部であるマイク嵌合孔１４０が設けられている。このマイク嵌合孔１４０に、ヘッドライニング１を挟んで鉛直下方からマイク２００が嵌合される。これにより、マイク２００はヘッドライニング１と当接することなく下層部１３０のみにより保持されるとともに、集音部２１０を除き全て下層部１３０に覆われることとなる。   A microphone fitting hole 140 that is a recess into which the microphone 200 is fitted is provided in a vertically lower portion of the lower layer portion 130. The microphone 200 is fitted into the microphone fitting hole 140 from below vertically with the headlining 1 interposed therebetween. As a result, the microphone 200 is held only by the lower layer part 130 without contacting the headlining 1, and is entirely covered by the lower layer part 130 except for the sound collecting part 210.

［遮音材による音振遮断・吸収］
（鉛直上方からの音振遮断・吸収作用）
降雨時等、ルーフパネル２に振動が発生した場合、ルーフパネル２に接する遮音材１００の上層部１１０によりルーフパネル２の振動が低減され、ルーフパネル２から発生する音が低減される。中層部１２０は遮音材であるため、上層部１１０の振動の大部分は中層部１２０により遮断される。 [Sound vibration insulation and absorption by sound insulation materials]
(Sound vibration blocking / absorbing action from above)
When the roof panel 2 vibrates during rain or the like, the vibration of the roof panel 2 is reduced by the upper layer portion 110 of the sound insulating material 100 in contact with the roof panel 2, and the sound generated from the roof panel 2 is reduced. Since the middle layer portion 120 is a sound insulating material, most of the vibration of the upper layer portion 110 is blocked by the middle layer portion 120.

中層部１２０を透過した音振は吸音・遮音材である下層部１３０によりほぼ吸収される。したがって、ルーフパネル２の音振はマイク２００にほとんど伝達せず、ルーフパネル２の音振がマイク２００の発信音に影響を及ぼすことはない。   The sound vibration that has passed through the middle layer 120 is almost absorbed by the lower layer 130 that is a sound absorbing and sound insulating material. Therefore, the sound vibration of the roof panel 2 is hardly transmitted to the microphone 200, and the sound vibration of the roof panel 2 does not affect the outgoing sound of the microphone 200.

すなわち、単に遮音材１００によってルーフパネル２側からの音を遮断するのみならず、遮音材１００をルーフパネル２に当接させることにより、ルーフパネル２そのものの振動も低減できるので、非常に効果が高いものになり、さらに、三層構造とすることでその効果をより向上させている。   That is, not only the sound insulation material 100 blocks the sound from the roof panel 2 side, but also the vibration of the roof panel 2 itself can be reduced by bringing the sound insulation material 100 into contact with the roof panel 2. The effect is further improved by using a three-layer structure.

（ヘッドライニングからの振動伝達防止作用）
上述のように、遮音材１００は下層部１３０においてヘッドライニング１と接着され、マイク２００は下層部１３０のマイク嵌合孔１４０との嵌合によってのみ保持され、ヘッドライニング１と当接しない。したがって、ヘッドライニング１の振動は直接マイク２００に伝達しない。 (Prevention of vibration transmission from headlining)
As described above, the sound insulating material 100 is bonded to the headlining 1 in the lower layer portion 130, and the microphone 200 is held only by fitting with the microphone fitting hole 140 in the lower layer portion 130, and does not contact the headlining 1. Therefore, the vibration of the headlining 1 is not transmitted directly to the microphone 200.

ヘッドライニング１に振動が発生したとしても、ヘッドライニング１とマイク２００との間にはフェルト材で形成された下層部１３０が介在するため、ヘッドライニング１の振動は下層部１３０により吸収されてマイク２００には伝達しない。   Even if vibration occurs in the headlining 1, since the lower layer portion 130 formed of a felt material is interposed between the headlining 1 and the microphone 200, the vibration of the headlining 1 is absorbed by the lower layer portion 130, and the microphone. 200 is not transmitted.

［従来例と本願実施例における作用効果の対比］
従来、マイクをヘッドライニングに配設した車両にあっては、マイクの外縁に防振ゴムを設けて振動を抑制しているが、マイクの鉛直上方には音振を遮断または吸収する部材が設けられていないため、雨音などマイクの鉛直上方からの音振を遮断または吸収することはできず、降雨時などはマイクの拡声音が聞き取りづらくなる、という問題があった。 [Contrast of the effects of the conventional example and the embodiment of the present application]
Conventionally, in a vehicle in which a microphone is disposed on a headlining, vibration is suppressed by providing an anti-vibration rubber on the outer edge of the microphone, but a member that blocks or absorbs sound vibration is provided vertically above the microphone. Therefore, there is a problem that it is impossible to block or absorb sound vibrations such as rain sound from vertically above the microphone, and it becomes difficult to hear the loud sound of the microphone when it rains.

これに対し本願実施例では、マイク２００が配設される部分に遮音材１００を設けた。これにより、ヘッドライニング１からの振動のみならずマイク２００の鉛直上方からの音振が伝達することを抑制することが可能となり、マイク２００の拡声音と外部からの音振との干渉を回避してマイク音が聞き取りづらくなることを回避できる。   On the other hand, in the present embodiment, the sound insulating material 100 is provided in the portion where the microphone 200 is disposed. As a result, it is possible to suppress transmission of not only vibration from the headlining 1 but also sound vibration from vertically above the microphone 200, and avoid interference between the loud sound of the microphone 200 and sound vibration from the outside. This makes it difficult to hear the microphone sound.

また、遮音材１００はルーフパネル２とヘッドライニング１との間に設けられ、遮音材１００はルーフパネル２及びヘッドライニング１と隙間なく当接させることとした。これにより、遮音材１００によりルーフパネル２及びヘッドライニング１０の振動を確実に吸収するとともに、ルーフパネル２とヘッドライニング１との間から進入する音振を吸収・遮断することが可能となり、マイク２００への音振伝達抑制効果をより向上させることができる。   The sound insulating material 100 is provided between the roof panel 2 and the head lining 1, and the sound insulating material 100 is brought into contact with the roof panel 2 and the head lining 1 without any gap. Accordingly, it is possible to reliably absorb the vibration of the roof panel 2 and the head lining 10 by the sound insulating material 100 and to absorb and block the sound vibration that enters between the roof panel 2 and the head lining 1. It is possible to further improve the effect of suppressing the transmission of sound vibrations.

また、遮音材１００は、ウレタン材の上層部１１０、ゴム材の中層部１２０、及びフェルト材の下層部１３０の３層構造とした。これにより、ルーフパネル２の振動を上層部１１０で吸収し、中層部１２０において鉛直下方への音振を遮断するとともに、下層部１３０においても音振を吸収・遮断することで、音振がルーフパネル２からマイク２００へ伝達することを確実に低減できる。   The sound insulating material 100 has a three-layer structure including an upper layer portion 110 of a urethane material, a middle layer portion 120 of a rubber material, and a lower layer portion 130 of a felt material. As a result, the vibration of the roof panel 2 is absorbed by the upper layer portion 110, and the sound vibration in the vertically downward direction is cut off in the middle layer portion 120, and the sound vibration is also absorbed and cut off in the lower layer portion 130. Transmission from the panel 2 to the microphone 200 can be reliably reduced.

さらに、マイク２００は遮音材１００の下層部１３０に設けられたマイク嵌合孔１４０に嵌合され、マイク２００は鉛直下面の拡声部２１０を除いた鉛直上方及び水平方向側面を全て下層部１３０に覆われることとした。これにより、ヘッドライニング１とマイク２００との間に下層部１３０が介在させ、ヘッドライニング１の振動がマイク２００に直接伝達することを回避し、音振遮断をより確実なものとすることができる。   Further, the microphone 200 is fitted into a microphone fitting hole 140 provided in the lower layer portion 130 of the sound insulating material 100, and the microphone 200 has all the vertically upper and horizontal side surfaces except the loudspeaker portion 210 on the vertical lower surface in the lower layer portion 130. It was decided to be covered. Thereby, the lower layer part 130 is interposed between the head lining 1 and the microphone 200, so that the vibration of the head lining 1 can be prevented from being directly transmitted to the microphone 200, and the sound vibration can be cut off more reliably. .

（他の実施例）
以上、本発明を実施するための最良の形態を実施例に基づいて説明してきたが、本発明の具体的な構成は各実施例に限定されるものではなく、発明の要旨を逸脱しない範囲の設計変更等があっても、本発明に含まれる。 (Other examples)
The best mode for carrying out the present invention has been described based on the embodiments. However, the specific configuration of the present invention is not limited to each embodiment, and the scope of the invention is not deviated. Design changes and the like are included in the present invention.

ヘッドライニングの斜視図である。It is a perspective view of a headlining. 後部座席における車両天井部分の断面図である。It is sectional drawing of the vehicle ceiling part in a rear seat. 後部座席における車両天井部分の拡大断面図である。It is an expanded sectional view of the vehicle ceiling part in a rear seat.

符号の説明Explanation of symbols

１ ヘッドライニング
２ ルーフパネル
３ ブラケット
１０ ヘッドライニング
１１ マイク配設孔
１２ 両面テープ
１００ 遮音材
１１０ 上層部
１２０ 中層部
１３０ 下層部
１４０ マイク嵌合孔
２００ マイク
２１０ 拡声部 DESCRIPTION OF SYMBOLS 1 Headlining 2 Roof panel 3 Bracket 10 Headlining 11 Microphone installation hole 12 Double-sided tape 100 Sound insulation material 110 Upper layer part 120 Middle layer part 130 Lower layer part 140 Microphone fitting hole 200 Microphone 210 Loudspeaker part

Claims (5)

車両の車室内に設けられた車両用マイクの遮音構造であって、
前記車室は、前記マイクの配設部を備えた内壁部材を有し、
前記マイクは、前記配設部に配設され、
前記内壁部材と車両外壁との間に、前記車両外壁及び前記内壁部材に当接する遮音材が設けられ、
前記マイクは、前記遮音材に支持されて前記配設部に配置されていることを特徴とする車両用マイクの遮音構造。 A sound insulation structure for a vehicle microphone provided in a vehicle interior of a vehicle,
The vehicle interior has an inner wall member provided with an arrangement portion of the microphone,
The microphone is disposed in the placement portion,
Between the inner wall member and the vehicle outer wall, a sound insulating material that comes into contact with the vehicle outer wall and the inner wall member is provided ,
The sound insulation structure for a vehicle microphone, wherein the microphone is supported by the sound insulation material and disposed in the placement portion . 請求項１に記載の車両用マイクの遮音構造において、
前記遮音材は、制振材と、音振遮断材と、吸音材の３層構造を有し、
前記音振遮断材は、前記制振材と前記吸音材に挟まれ、
前記制振材は、前記車両外壁に当接し、
前記吸音材は、前記内壁部材に当接することを特徴とする車両用マイクの遮音構造。 The sound insulation structure for a vehicle microphone according to claim 1,
The sound insulating material has a three-layer structure of a vibration damping material, a sound vibration blocking material, and a sound absorbing material,
The sound vibration blocking material is sandwiched between the vibration damping material and the sound absorbing material,
The damping material is in contact with the outer wall of the vehicle,
The sound insulation structure for a vehicle microphone, wherein the sound absorbing material abuts on the inner wall member. 請求項１又は２に記載の車両用マイクの遮音構造において、
前記マイクは、一の乗員の声を集音するとともに、該音声情報を他の乗員の近傍に配置された拡声器に送信し、乗員同士の会話を補助する会話補助装置の構成品であることを特徴とする車両用マイクの遮音構造。 In the sound insulation structure of the vehicle microphone according to claim 1 or 2 ,
The microphone collects the voice of one occupant and transmits the voice information to a loudspeaker arranged near another occupant to be a component of a conversation assistance device that assists the conversation between the occupants. A sound insulation structure for a vehicle microphone. 請求項１ないし請求項３に記載の車両用マイクの遮音構造において、
前記遮音材は、前記マイクの集音部を除き、前記マイクの外周を全て被覆することを特徴とする車両用マイクの遮音構造。 In the sound insulation structure of the vehicle microphone according to any one of claims 1 to 3,
The sound insulation structure for a vehicle microphone, wherein the sound insulation material covers the entire outer periphery of the microphone except for the sound collection portion of the microphone. 請求項１ないし請求項４に記載の車両用マイクの遮音構造において、
前記内壁部材はヘッドライニングであって、
前記車両外壁はルーフパネルであることを特徴とする車両用マイクの遮音構造。 The sound insulation structure for a vehicle microphone according to claim 1,
The inner wall member is a head lining,
The sound insulation structure for a vehicle microphone, wherein the vehicle outer wall is a roof panel.
JP2005150253A 2005-05-23 2005-05-23 Sound insulation structure for vehicle microphones Active JP4747672B2 (en)

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