JP2010153952A - Loudspeaker - Google Patents

Loudspeaker Download PDF

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Publication number
JP2010153952A
JP2010153952A JP2008326769A JP2008326769A JP2010153952A JP 2010153952 A JP2010153952 A JP 2010153952A JP 2008326769 A JP2008326769 A JP 2008326769A JP 2008326769 A JP2008326769 A JP 2008326769A JP 2010153952 A JP2010153952 A JP 2010153952A
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Japan
Prior art keywords
speaker
diaphragm
driver
speaker box
speaker driver
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JP2008326769A
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Japanese (ja)
Inventor
Niro Nakamichi
仁郎 中道
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Individual
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Individual
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Priority to JP2008326769A priority Critical patent/JP2010153952A/en
Priority to PCT/JP2009/071878 priority patent/WO2010074337A1/en
Publication of JP2010153952A publication Critical patent/JP2010153952A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2853—Enclosures comprising vibrating or resonating arrangements using an acoustic labyrinth or a transmission line
    • H04R1/2857—Enclosures comprising vibrating or resonating arrangements using an acoustic labyrinth or a transmission line for loudspeaker transducers

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  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a loudspeaker capable of solving the problem that sounds emitted from a back surface of a speaker driver to the inside of a speaker box must be more efficiently removed. <P>SOLUTION: The loudspeaker includes: a speaker box attached with a speaker driver; an opening portion provided on the speaker box and emitting a sound pressure generated by a diaphragm of the speaker driver to the outside of the speaker box; a reduced-diameter portion arranged on the rear side of the diaphragm and having a small cross sectional area in a direction orthogonal direction away from the diaphragm; and a bulging portion provided between the reduced-diameter portion and the opening portion and having a large cross sectional area in a direction orthogonal to the direction away from the diaphragm. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、スピーカーボックスにスピーカードライバーが取り付けられたスピーカーに関する。   The present invention relates to a speaker in which a speaker driver is attached to a speaker box.

スピーカーボックスの形式は、密閉型、バスレフ型、パッシブラジエター型などの方式が知られている。なかでも例えば特許文献１に示される、スピーカードライバーの正面だけからの音圧を使用する密閉型のスピーカーボックスは、他のどの方式と比較して、一般的に低音の瞬間的なレスポンスや位相特性に優れる。
特開平５−１２２７８２号公報 Known types of speaker boxes include sealed, bass-reflex, and passive radiator types. In particular, for example, Patent Document 1 discloses a sealed speaker box that uses sound pressure only from the front of a speaker driver. Excellent.
Japanese Patent Laid-Open No. 5-122782

しかしながら、密閉型スピーカーボックスの場合、スピーカードライバーの振動板が入力信号によって振動すると、スピーカーボックス内部の容積変化によって振動板に正又は負の圧力が生じるため、入力信号に忠実な応答ができないという欠点がある。この点を解消できるのが所謂無限バッフル方式であるが、非常に大きなバッフル板を用意する必要があり、一般的な家庭内に設置するのはスペースの点で困難である。   However, in the case of a sealed speaker box, when the diaphragm of the speaker driver is vibrated by an input signal, a positive or negative pressure is generated on the diaphragm due to a volume change inside the speaker box, so that a faithful response to the input signal cannot be made. There is. The so-called infinite baffle system can solve this problem, but it is necessary to prepare a very large baffle plate, and it is difficult to install it in a general home in terms of space.

本発明は上述の課題を解決するために、スピーカードライバーが取り付けられるスピーカーボックスと、スピーカーボックスに設けられ、振動板によって生じる音圧を前記スピーカーボックス外部に放出する開口部と、振動板の裏側に配置され、振動板から離れる方向と直交する方向の断面積が狭い縮径部と、縮径部と開口部との間に設けられ、振動板から離れる方向と直交する方向の断面積が大きい膨張部とを備える。   In order to solve the above-described problems, the present invention provides a speaker box to which a speaker driver is attached, an opening provided in the speaker box for discharging sound pressure generated by the diaphragm to the outside of the speaker box, and a back side of the diaphragm. A reduced diameter portion having a narrow cross-sectional area in a direction orthogonal to the direction away from the diaphragm, and an expansion provided between the reduced diameter portion and the opening and having a large cross-sectional area in the direction orthogonal to the direction away from the diaphragm A part.

本発明によれば、スピーカードライバーの振動板に圧力をかけることがない無限バッフルと同じ効果を得つつ、小型で高音質のスピーカーを実現可能である。   According to the present invention, it is possible to realize a small and high-quality speaker while obtaining the same effect as an infinite baffle that does not apply pressure to a speaker driver's diaphragm.

以下、本発明による最良の実施形態を、添付図面を参照しながら説明する。   DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings.

以下、本発明の実施例を説明する。図１、図２はそれぞれ本発明装置の正面図及び背面図、図３は図１におけるＡ−Ａ線断面図である。スピーカー１のスピーカーボックス２にはスピーカードライバー３が図示しないネジで取り付けられている。スピーカーボックス２の背面にはスピーカーボックス２を閉塞すべくリアパネル４が設けられている。   Examples of the present invention will be described below. 1 and 2 are a front view and a rear view of the device of the present invention, respectively, and FIG. 3 is a cross-sectional view taken along line AA in FIG. A speaker driver 3 is attached to the speaker box 2 of the speaker 1 with screws (not shown). A rear panel 4 is provided on the back of the speaker box 2 so as to close the speaker box 2.

スピーカードライバー２とリアパネル４を取り外した状態の正面図と背面図である図４と図５、及びその斜視図である図６を用いてスピーカーボックス２の構造を説明する。スピーカードライバー３はスピーカーボックス２のドライバー収納部５の内部に収納される。このドライバー収納部５の側面には切欠き６が設けられており、スピーカードライバー３の振動板７の背面からの音圧がドライバー収納部５から外部に流出する。なお、図３において振動板７の振動軸を矢印Ｂ−Ｂとして示す。   The structure of the speaker box 2 will be described with reference to FIGS. 4 and 5 which are a front view and a rear view with the speaker driver 2 and the rear panel 4 removed, and FIG. 6 which is a perspective view thereof. The speaker driver 3 is stored in the driver storage section 5 of the speaker box 2. A notch 6 is provided on the side surface of the driver housing 5, and sound pressure from the back surface of the diaphragm 7 of the speaker driver 3 flows out from the driver housing 5. In FIG. 3, the vibration axis of the diaphragm 7 is indicated by arrows BB.

切欠き６からドライバー収納部５の外に出た音圧は、第1の膨張部１１に流入し、引き続きスリット１５を介して第２の膨張部１２に流入する。更にスリット１６、第３の膨張部１３、スリット１７、第４の膨張部１４の順に音圧が伝搬された後、リアパネル４に設けられた開口部１８からスピーカーボックス２の外に放出される。   The sound pressure that has flowed out of the driver storage portion 5 from the notch 6 flows into the first expansion portion 11 and then flows into the second expansion portion 12 via the slit 15. Further, after the sound pressure is propagated in the order of the slit 16, the third expansion portion 13, the slit 17, and the fourth expansion portion 14, the sound pressure is emitted from the opening 18 provided in the rear panel 4 to the outside of the speaker box 2.

図７はスピーカードライバー３の振動板７の裏側からの音圧は最終的に開口部１８から放出されるまでのスピーカーボックス２の内部構造を示す模式図である。スピーカードライバー３の背面からの音圧はドライバー収納部５に設けられた切欠き６を通過後、断面積の大きな第１の膨張部１１に流入することにより、圧力が低下する。スピーカードライバー３からの音圧は更にスリット１５を通過後に第２の膨張部１２に流入することにより、再度圧力が低下する。   FIG. 7 is a schematic diagram showing the internal structure of the speaker box 2 until the sound pressure from the back side of the diaphragm 7 of the speaker driver 3 is finally released from the opening 18. The sound pressure from the back surface of the speaker driver 3 passes through the notch 6 provided in the driver housing portion 5 and then flows into the first expansion portion 11 having a large cross-sectional area, whereby the pressure is reduced. The sound pressure from the speaker driver 3 further passes through the slit 15 and then flows into the second inflating portion 12, whereby the pressure is reduced again.

この断面積の狭い切欠き６、スリット１５〜１７及び開口部１８からなる縮径部を通過後に容積の大きい膨張部１１〜１３及びスピーカーボックス２外に音圧が通過することで、合計５回に亘って音圧が低下する。これにより、スピーカードライバー３の振動板から発せられる圧力波が減少され、スピーカードライバー３を無限バッフルに取り付けたのと同じ状況をつくり出すことが出来る。   The sound pressure passes outside the expanded portion 11-13 having a large volume and the speaker box 2 after passing through the reduced diameter portion including the notch 6, the slits 15-17, and the opening 18 having a narrow cross-sectional area. The sound pressure decreases over a period of time. As a result, the pressure wave generated from the diaphragm of the speaker driver 3 is reduced, and the same situation as when the speaker driver 3 is attached to the infinite baffle can be created.

なお、上述の切欠き６及びスリット１５〜１７はバスレフ型スピーカーにおける位相反転用のポートとしての機能は有しておらず、振動板７からの圧力波を収縮し、続く膨張部１１〜１４によって膨張させるためのものである。この原理は自動車のマフラーに使用されているサイレンサーと基本的には同じ原理を応用している。   The notch 6 and the slits 15 to 17 described above do not have a function as a phase inversion port in the bass reflex type speaker, and contract the pressure wave from the diaphragm 7, and continue with the expanding portions 11 to 14. It is for inflating. This principle is basically the same as the silencer used in automobile mufflers.

また、上述の実施例においては膨張部１１〜１４はスピーカードライバー３の振動軸Ｂ−Ｂ線と直行する方向に配置されているため、膨張部１１〜１４を設けてもスピーカー１の厚さはスピーカードライバー３の奥行き方向の寸法で決定される。従って、膨張部１１〜１４を設けることによってスピーカー１の厚みが大きくなることはない。   Further, in the above-described embodiment, the expansion portions 11 to 14 are arranged in a direction orthogonal to the vibration axis B-B line of the speaker driver 3, so that the thickness of the speaker 1 is not limited even if the expansion portions 11 to 14 are provided. It is determined by the dimension of the speaker driver 3 in the depth direction. Therefore, the thickness of the speaker 1 is not increased by providing the expanding portions 11 to 14.

なお、開口部１８から中高音の音が漏れる場合は、必要に応じ、膨張部１１〜１４に柔らかい素材の吸音材を若干入れても良い。   In addition, when middle and high-pitched sound leaks from the opening part 18, you may put some sound-absorbing material of a soft material in the expansion parts 11-14 as needed.

また、スピーカードライバー３の背面からの音は一旦縮径部を通過してから膨張部に放出されるが、この膨張空間の形状は任意の形状を取り得る。もちろん、切欠き６及びスリット１５〜１７はその断面積を小さくすることが目的であるので、これも任意の形状を取り得る。   Further, the sound from the back surface of the speaker driver 3 passes through the reduced diameter portion and then is emitted to the inflated portion, but the shape of the inflating space can take any shape. Of course, since the notch 6 and the slits 15 to 17 are intended to reduce their cross-sectional areas, they can also take any shape.

また、上述の実施例においては膨張部１１〜１４を４個所設けていたが、本発明はこれに限定されることなく、スピーカードライバーの種類によっては１個所のみ設けることも可能であるなど、本発明は上述の実施例に限定されることなく、種々の態様を取り得る。   In the above-described embodiment, four inflating portions 11 to 14 are provided. However, the present invention is not limited to this, and depending on the type of speaker driver, it is possible to provide only one location. The invention is not limited to the above-described embodiments, and can take various forms.

以上のごとく、スピーカーボックス２内に圧力を減少させるためのスリット６もしくは切欠き１５〜１７と膨張部１１〜１４を設けることにより、スピーカードライバー３からスピーカーボックス２内に放出される音の圧力を効果的に減少させ、スピーカードライバー３の振動板７に加わる圧力を減少させ、入力信号に忠実な透明度の高い再生音を得ることが可能となる。   As described above, by providing the slit 6 or the notches 15 to 17 and the expanding portions 11 to 14 for reducing the pressure in the speaker box 2, the pressure of the sound emitted from the speaker driver 3 into the speaker box 2 can be reduced. It is possible to effectively reduce the pressure applied to the diaphragm 7 of the speaker driver 3 and obtain a highly transparent reproduction sound that is faithful to the input signal.

スピーカー１の正面図。The front view of the speaker 1. FIG. スピーカー１の背面図。The rear view of the speaker 1. FIG. 図1におけるＡ−Ａ線断面図。FIG. 2 is a cross-sectional view taken along line AA in FIG. スピーカードライバー２とリアパネル４を取り外した状態のスピーカーボックス２の正面図。The front view of the speaker box 2 of the state which removed the speaker driver 2 and the rear panel 4. FIG. スピーカードライバー２とリアパネル４を取り外した状態のスピーカーボックス２の背面図。The rear view of the speaker box 2 of the state which removed the speaker driver 2 and the rear panel 4. FIG. スピーカードライバー２とリアパネル４を取り外した状態のスピーカーボックス２の斜視図。The perspective view of the speaker box 2 of the state which removed the speaker driver 2 and the rear panel 4. FIG. スピーカーボックス２の内部構造を示す模式図。The schematic diagram which shows the internal structure of the speaker box 2. FIG.

符号の説明Explanation of symbols

１ スピーカー
２ スピーカーボックス
３ スピーカードライバー
４ リアパネル
６ 切欠き
７ 振動板
１１〜１４ 膨張部
１５〜１７ スリット
１８ 開口部 DESCRIPTION OF SYMBOLS 1 Speaker 2 Speaker box 3 Speaker driver 4 Rear panel 6 Notch 7 Diaphragm 11-14 Expansion part 15-17 Slit 18 Opening part

Claims (2)

スピーカードライバーが取り付けられるスピーカーボックスと、
該スピーカーボックスに設けられ、前記スピーカードライバーの振動板によって生じる音圧を前記スピーカーボックス外部に放出する開口部と、
前記振動板の裏側に配置され、該振動板から離れる方向と直交する方向の断面積が狭い縮径部と、
前記縮径部と開口部との間に設けられ、前記振動板から離れる方向と直交する方向の断面積が大きい膨張部とを備えたことを特徴とするスピーカー。 A speaker box to which a speaker driver can be attached;
An opening that is provided in the speaker box and discharges the sound pressure generated by the diaphragm of the speaker driver to the outside of the speaker box;
A reduced diameter portion that is disposed on the back side of the diaphragm and has a narrow cross-sectional area in a direction orthogonal to the direction away from the diaphragm,
A speaker comprising: an expansion portion provided between the reduced diameter portion and the opening and having a large cross-sectional area in a direction orthogonal to a direction away from the diaphragm. 前記縮径部と膨張部とをそれぞれ複数個設けると共に、前記膨張部を前記スピーカードライバーの振動軸と直交する方向に配置したことを特徴とする請求項１に記載のスピーカー。   2. The speaker according to claim 1, wherein a plurality of the reduced diameter portions and a plurality of expansion portions are provided, and the expansion portions are arranged in a direction orthogonal to a vibration axis of the speaker driver.
JP2008326769A 2008-12-24 2008-12-24 Loudspeaker Pending JP2010153952A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2008326769A JP2010153952A (en) 2008-12-24 2008-12-24 Loudspeaker
PCT/JP2009/071878 WO2010074337A1 (en) 2008-12-24 2009-12-24 Speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008326769A JP2010153952A (en) 2008-12-24 2008-12-24 Loudspeaker

Publications (1)

Publication Number Publication Date
JP2010153952A true JP2010153952A (en) 2010-07-08

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JP2008326769A Pending JP2010153952A (en) 2008-12-24 2008-12-24 Loudspeaker

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JP (1) JP2010153952A (en)
WO (1) WO2010074337A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2690885A3 (en) * 2012-07-23 2015-10-07 Uniwersystet Slaski w Katowicach Acoustic speakers

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2653377B2 (en) * 1987-06-16 1997-09-17 松下電器産業株式会社 Speaker system
JP2707553B2 (en) * 1987-09-08 1998-01-28 松下電器産業株式会社 Speaker system
JPH0412787U (en) * 1990-05-23 1992-01-31

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2690885A3 (en) * 2012-07-23 2015-10-07 Uniwersystet Slaski w Katowicach Acoustic speakers

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Publication number Publication date
WO2010074337A1 (en) 2010-07-01

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