JPH11308689A - Loudspeaker system - Google Patents
Loudspeaker systemInfo
- Publication number
- JPH11308689A JPH11308689A JP11360698A JP11360698A JPH11308689A JP H11308689 A JPH11308689 A JP H11308689A JP 11360698 A JP11360698 A JP 11360698A JP 11360698 A JP11360698 A JP 11360698A JP H11308689 A JPH11308689 A JP H11308689A
- Authority
- JP
- Japan
- Prior art keywords
- speaker
- duct
- box
- diaphragm
- force
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005855 radiation Effects 0.000 abstract description 18
- 230000002093 peripheral effect Effects 0.000 description 11
- 230000001133 acceleration Effects 0.000 description 4
- 229920003002 synthetic resin Polymers 0.000 description 4
- 239000000057 synthetic resin Substances 0.000 description 4
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 2
- 208000035388 Ring chromosome 22 syndrome Diseases 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 208000032825 Ring chromosome 2 syndrome Diseases 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- 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
- H04R1/2815—Enclosures comprising vibrating or resonating arrangements of the bass reflex type
- H04R1/2823—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material
- H04R1/2826—Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material for loudspeaker transducers
-
- 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
- H04R1/283—Enclosures comprising vibrating or resonating arrangements using a passive diaphragm
- H04R1/2834—Enclosures comprising vibrating or resonating arrangements using a passive diaphragm for loudspeaker transducers
-
- 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
- H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
- H04R1/2873—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself for loudspeaker transducers
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は小型軽量なスピーカ
装置に係わり、特にスピーカボックス内に配設した振動
体を介してスピーカ振動板の音放射力の反作用力を相殺
或は減衰させる様に成したスピーカ装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small and lightweight loudspeaker device, and more particularly to a device for canceling or attenuating a reaction force of a sound radiation force of a loudspeaker diaphragm via a vibrating body disposed in a loudspeaker box. The present invention relates to a loudspeaker device.
【0002】[0002]
【従来の技術】従来からスピーカ装置の低域再生限界を
伸ばすための有効な手段として例えば、スピーカを設け
たバッフル板に開口及びダクトを設け、スピーカの振動
板の背面から出た音の位相を反転して、ダクトを介して
開口から外部に放射させて、スピーカの振動板から前面
に出る音波を強め、低音域を歪まない様にしたバスレフ
レックス型(位相反転型)のスピーカ装置は良く知られ
ている。2. Description of the Related Art Conventionally, as an effective means for extending the low-frequency reproduction limit of a speaker device, for example, an opening and a duct are provided in a baffle plate provided with a speaker, and a phase of a sound emitted from a back surface of a diaphragm of the speaker is adjusted. A bass reflex type (phase inversion type) speaker device which inverts and radiates to the outside through an opening through a duct to enhance the sound wave emitted from the diaphragm of the speaker to the front so as not to distort the bass range is well known. Have been.
【0003】この様な位相反転型スピーカ装置は図6に
示す様にスピーカボックス1の前面に設けたバッフル板
2に穿ったスピーカ放音孔2aに対向してスピーカ3を
固定する。In such a phase inversion type speaker device, a speaker 3 is fixed opposite a speaker sound emission hole 2a formed in a baffle plate 2 provided on a front surface of a speaker box 1 as shown in FIG.
【0004】このスピーカ3は例えば、図6に示す如
く、リング状マグネット4と、このリング状マグネット
4を挟むように取付けられたプレート5及びヨーク6と
を設け、プレート5の内周側とヨーク6のセンターポー
ル6aとの間に磁気空隙7を形成する。またプレート5
にはスピーカ3のフレーム8が取付けられ、振動板10
の外周部にエッジ9が設けられ、このエッジ9によって
コーン型の振動板10の外周部がフレーム8に保持され
ている。For example, as shown in FIG. 6, the speaker 3 is provided with a ring-shaped magnet 4, a plate 5 and a yoke 6 mounted so as to sandwich the ring-shaped magnet 4, and an inner peripheral side of the plate 5 and a yoke. The magnetic gap 7 is formed between the center gap 6 and the center pole 6a. Plate 5
The frame 8 of the speaker 3 is attached to the
An edge 9 is provided on the outer peripheral portion of the diaphragm 8, and the outer peripheral portion of the cone-shaped diaphragm 10 is held on the frame 8 by the edge 9.
【0005】一方、振動板10の内周部にボイスコイル
ボビン11が取付けられており、このボイスコイルボビ
ン11にはボイスコイル12が巻装され、ボイスコイル
12はプレート5及びヨーク6のセンターポール6aに
よって形成された磁気空隙7内に挿入する様になされて
いる。17はこのボイスコイル12をこの磁気空隙7内
に保持するためのダンパである。On the other hand, a voice coil bobbin 11 is mounted on the inner peripheral portion of the diaphragm 10, and a voice coil 12 is wound around the voice coil bobbin 11, and the voice coil 12 is fixed by a center pole 6a of the plate 5 and the yoke 6. It is designed to be inserted into the formed magnetic gap 7. Reference numeral 17 denotes a damper for holding the voice coil 12 in the magnetic gap 7.
【0006】またスピーカボックス1の外部の所定位置
に設けられた入力端子13aよりの音響信号を接続線1
4aを介してスピーカ3の端子15に供給し、端子15
よりの音響信号を錦糸線16を介してボイスコイル12
に供給している。An acoustic signal from an input terminal 13a provided at a predetermined position outside the speaker box 1 is connected to a connection line 1
4a to the terminal 15 of the speaker 3 via the terminal 15a.
Of the voice coil 12 via the tinsel wire 16
To supply.
【0007】また、バッフル板2のスピーカ放音孔2a
と同一面に開口18aを有するダクト18を設け、スピ
ーカ3の振動板10の背面から出た音の位相を反転し
て、このダクト18からスピーカボックス1の外に放射
し、この振動板10の前面からでる音の低音域を拡げて
いる。[0007] Further, the speaker sound emission hole 2a of the baffle plate 2
A duct 18 having an opening 18a is provided on the same surface as the above, and the phase of the sound emitted from the back surface of the diaphragm 10 of the speaker 3 is inverted and radiated from the duct 18 to the outside of the speaker box 1. The bass range of the sound coming out from the front is expanded.
【0008】上述の様に位相反転型のスピーカ装置とす
ることで、密閉型に比べて低音再生限界を低くすること
が出来て、スピーカ3の低音共振周波数f0 の約80%
程度まで低域再生範囲を拡げることが出来るとされてい
る。As described above, by using a phase inversion type speaker device, the bass reproduction limit can be lowered as compared with the sealed type, and about 80% of the bass resonance frequency f 0 of the speaker 3 can be obtained.
It is said that the low-frequency reproduction range can be extended to a degree.
【0009】この様なスピーカ装置では図6に示す様
に、スピーカ3の振動板10の振動による音放射力F1
はスピーカ3の等価質量M1 にスピーカ3の振動板10
に働く加速度α1 即ち、F1 =M1 ・α1 で表せる。こ
の様な音放射力F1 に対し、振動板10の背面側からス
ピーカボックス1内に向かう反作用力−F1 も、スピー
カ装置が小型軽量でスピーカボックス1の容積が小さく
なれば顕著になり、振動板10の振動によってスピーカ
ボックス1内の空気は圧縮及び膨張を繰返し、この空気
は振動板10を元の位置に戻そうとする力となって働く
ためスピーカボックス1を揺動させ、低音再生が阻害さ
れる問題があった。In such a speaker device, as shown in FIG. 6, sound radiation force F 1 due to vibration of diaphragm 10 of speaker 3 is obtained.
Is the diaphragm 10 of the speaker 3 on the equivalent mass M 1 of the speaker 3.
Acceleration α 1 that is working in, expressed by F 1 = M 1 · α 1 . To such sound radiation force F 1, the reaction force -F 1 toward the speaker box 1 from the rear side of the diaphragm 10 also becomes remarkable the smaller the volume of the speaker box 1 speaker device is small and light, The air in the speaker box 1 is repeatedly compressed and expanded by the vibration of the diaphragm 10, and this air acts as a force to return the diaphragm 10 to its original position. There was a problem that was hindered.
【0010】この様な問題を解決するために本出願人は
先に図7に示す様なスピーカ装置を提案した、図7で図
6との対応部分には同一符号を付して示す。In order to solve such a problem, the applicant has previously proposed a speaker device as shown in FIG. 7. In FIG. 7, portions corresponding to those in FIG. 6 are denoted by the same reference numerals.
【0011】図7に於いて、スピーカボックス1は合成
樹脂で箱形にバッフル板2と一体に成型される。バッフ
ル板2の上側に穿設されたスピーカ放音孔2aに対向し
て、図6で詳記したと同様構成のスピーカ3を固定す
る。バッフル板2の下側に配された第1のダクト18及
び開口18aはバッフル板2の成型時に一体に形成され
る。In FIG. 7, a speaker box 1 is formed of a synthetic resin into a box shape integrally with a baffle plate 2. The speaker 3 having the same configuration as that described in detail with reference to FIG. 6 is fixed to the speaker sound emission hole 2a formed on the upper side of the baffle plate 2. The first duct 18 and the opening 18a disposed below the baffle plate 2 are integrally formed when the baffle plate 2 is molded.
【0012】又、後面板1Bの上部にはバッフル板2に
穿ったスピーカ放音孔2aと対向する位置にスピーカ放
音孔2bを穿ち、第2のスピーカ3bを、好ましくはス
ピーカ3と背面同志が対向する様に、且つスピーカ放音
孔2bと対向する様に後面板1Bに固定すると共に第1
のダクト18よりダクト径の大きい第2のダクト18b
を第1のダクト18の所定長さ内でオーバラップし、且
つ同心円状断面が形成される様に後面板1Bと一体に植
立させ、第2のダクト18bの開口18cを通して第1
のダクト18の開口18aに放射する空気の等価質量M
D 及び等価抵抗RD を大きくする様に構成させている。A speaker sound emission hole 2b is formed at a position opposite to the speaker sound emission hole 2a formed on the baffle plate 2 above the rear face plate 1B, so that the second speaker 3b, preferably the speaker 3 and the back surface, are connected to each other. Is fixed to the rear plate 1B so that the first
Second duct 18b having a larger duct diameter than the second duct 18
Are overlapped within a predetermined length of the first duct 18 and are planted integrally with the rear plate 1B so as to form a concentric cross section, and the first through the opening 18c of the second duct 18b.
Equivalent mass M of air radiating to the opening 18a of the duct 18
D and the equivalent resistance RD are configured to be large.
【0013】更に、第1及び第2のスピーカ3及び3b
には後面板1Bに配設した入力端子13a及び13b並
びに接続線14a及び14bを介して同一入力の音響信
号が供給されている。Further, the first and second speakers 3 and 3b
Are supplied with the same input acoustic signal via input terminals 13a and 13b and connection lines 14a and 14b disposed on the rear panel 1B.
【0014】上記した図7のスピーカ装置によれば第1
及び第2のダクト18及び18b間のダクト放射力FD1
及びFD2/2+FD2/2の反作用力−FD1及び−FD2/
2+(−FD2/2)は夫々相殺されるので第1及び第2
のスピーカ3及び3bの放射力F1 及びF2 の反作用力
−F1 及び−F2 はF1 ≒F2 とすれば互に相殺するこ
とが出来る。According to the speaker device shown in FIG.
Radiation force F D1 between the first and second ducts 18 and 18b
And F D2 / 2 + F D2 / 2 of the reaction force -F D1 and -F D2 /
2 + (− F D2 / 2) are canceled out, so that the first and second
Loudspeakers 3 and 3b reactive force -F 1 and -F 2 of radiation force F 1 and F 2 of F 1 ≒ F 2 Tosureba can each other to cancel.
【0015】[0015]
【発明が解決しようとする課題】然し、上記した構成で
はスピーカボックス1内に一対の略同一構造のスピーカ
3及び3bを必要とし、スピーカボックス1の小型化を
図り難くなるだけでなく高価となる問題があった。However, the above-described structure requires a pair of speakers 3 and 3b having substantially the same structure in the speaker box 1, making it difficult to reduce the size of the speaker box 1 and increasing the cost. There was a problem.
【0016】更に、スピーカの振動系を等しく作った2
つのスピーカでは低域共振周波数であるf0 の高い方が
共振鋭度のQはf0 に比例して大きくなるため低域の再
生には不向きになる弊害があった。Further, the vibration system of the speaker was made equal.
In one loudspeaker, the higher the low-band resonance frequency f 0 , the higher the resonance sharpness Q becomes in proportion to f 0 , so that there is a problem that it is not suitable for low-frequency reproduction.
【0017】本発明は叙上の問題点を解消したスピーカ
装置を提供しようとするものであり、発明が解決しよう
とする課題はダクトにコンプライアンスを付与するか、
簡単な可動性の振動体をダクトに配設して、スピーカの
音放射力の反作用力を相殺させて、低域の拡大と強力な
低域放射を行うと共に軽量なスピーカボックスの揺動を
防止可能なスピーカ装置を得ようとするものである。An object of the present invention is to provide a speaker device which has solved the above-mentioned problems.
A simple movable vibrator is arranged in the duct to counteract the reaction force of the sound radiation force of the speaker, thereby expanding the low frequency range and providing powerful low frequency radiation, while preventing the swing of the lightweight speaker box. It is intended to obtain a possible speaker device.
【0018】[0018]
【課題を解決するための手段】本発明のスピーカ装置は
スピーカボックス内にスピーカを配設すると共に位相反
転型のダクトを具備して成るスピーカ装置であって、ダ
クトにコンプライアンスを付加させる様に成したもので
ある。SUMMARY OF THE INVENTION A speaker device according to the present invention is a speaker device having a speaker disposed in a speaker box and having a phase inversion type duct. It was done.
【0019】本発明のきスピーカ装置によれば位相反転
用のダクトにコンプライアンスを付加するだけでスピー
カの音放射力の反作用力を相殺又は減衰可能なものが得
られる。According to the loudspeaker apparatus of the present invention, it is possible to obtain a loudspeaker capable of canceling out or attenuating the reaction force of the sound radiation force of the loudspeaker only by adding compliance to the duct for phase inversion.
【0020】[0020]
【発明の実施の形態】以下、本発明の小型スピーカ装置
の一形態例を図1乃至図5によって説明する。尚、図6
及び図7で示したスピーカ装置との対応部分には同一符
号を付して示している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a small speaker device according to the present invention will be described below with reference to FIGS. FIG.
Parts corresponding to those of the speaker device shown in FIG. 7 are denoted by the same reference numerals.
【0021】図1は本例のスピーカ装置の一形態例を示
す側断面図であり、図6で説明したと同様構成のスピー
カボックス1に図6で詳記したスピーカ3を配設したも
のであり、スピーカボックス1のバッフル板2は以下説
明する以外は同一構造であるので対応部分には同一符号
を付して重複説明を省略する。FIG. 1 is a side sectional view showing one embodiment of the speaker device of the present embodiment, in which a speaker 3 described in detail in FIG. 6 is disposed in a speaker box 1 having the same configuration as that described in FIG. The baffle plate 2 of the speaker box 1 has the same structure except for the following description.
【0022】図1のスピーカ装置に於いて、スピーカボ
ックス1はABS樹脂等で略々直方体状に成型され、バ
ッフル板2に穿ったスピーカ放音孔2aと対向して、図
6で詳記したスピーカ3が固定されている。In the speaker device shown in FIG. 1, the speaker box 1 is formed of an ABS resin or the like into a substantially rectangular parallelepiped shape, and faces the speaker sound emission hole 2a formed in the baffle plate 2 as shown in FIG. The speaker 3 is fixed.
【0023】スピーカ3の下側のバッフル板2の左右略
中心位置にダクト18の開口18aが穿たれている。こ
のダクト18は図1及び図5(A)の斜視図に示す様に
コンプライアンスを付与する様に例えば、合成樹脂でバ
ッフル板2と一体にスピーカのダンパ等と同様形状の波
形の同心円状の山谷を設けた可動部20を介してダクト
18を片持保持させる様にする。An opening 18a of a duct 18 is formed substantially at the center on the left and right sides of the baffle plate 2 on the lower side of the speaker 3. As shown in the perspective views of FIGS. 1 and 5A, the duct 18 is made of synthetic resin and integrated with the baffle plate 2 and has a corrugated concavity and valley having the same shape as a speaker damper or the like. The duct 18 is cantilevered via the movable portion 20 provided with the slab.
【0024】上述の様にスピーカボックス1に可撓性の
ダクト18を配設することで、可動部20でコンプライ
アンスが与えられるがスピーカのダンパ等に比べて充分
大きなスチフネスを有し、ダクト18自体がウエイトと
なって等価質量が付与され、振動体25として機能す
る。By arranging the flexible duct 18 in the speaker box 1 as described above, compliance can be given by the movable portion 20, but the stiffness is sufficiently large as compared with the speaker damper or the like. Serve as weights, are given an equivalent mass, and function as the vibrating body 25.
【0025】上述の構成で、スピーカ3を駆動すれば振
動板10の音放射力F1 はF1 =M1 ・α1 と表せる。
ここでM1 はスピーカ3の振動系の等価質量、α1 は振
動板10の加速度である。When the speaker 3 is driven in the above configuration, the sound radiation force F 1 of the diaphragm 10 can be expressed as F 1 = M 1 · α 1 .
Here, M 1 is the equivalent mass of the vibration system of the speaker 3, and α 1 is the acceleration of the diaphragm 10.
【0026】上述の音放射力F1 に対する反作用力−F
1 も−F1 =M1 ・α1 として動作する。[0026] The reaction force -F to the sound radiation force F 1 of the above-mentioned
1 also operates as −F 1 = M 1 · α 1 .
【0027】今、スピーカボックス1内の空気の容積を
VB とし、静止圧力をPとし、スピーカ3の振動板10
の有効面積をS、振動板10の振幅をXとして、スピー
カ3の振動板10をF1 で示す方向の音放射力で駆動し
た場合、スピーカボックス1内の空気の容積はVB =S
・X分だけ膨張する様に変化する。Now, assume that the volume of air in the speaker box 1 is V B , the static pressure is P, and the diaphragm 10 of the speaker 3
The effective area of S, the amplitude of the vibration plate 10 as the X, when driving the diaphragm 10 of the speaker 3 sound radiation forces in the direction indicated by F 1, the volume of air in the speaker box 1 V B = S
-It changes so that it may expand by X minutes.
【0028】従って、可動部20とウエイトとしてのダ
クト18で構成される振動体25の等価質量をM3 、振
動体25の加速度をα3 とすると、上述のVB =S・X
の変化分を駆動源としたF3 =M3 ・α3 の作用力がス
ピーカボックス1内の圧力と外気(スピーカボックス1
の外側の圧力)差に基づいて振動体25に働くことにな
る。Accordingly, if the equivalent mass of the vibrating body 25 composed of the movable part 20 and the duct 18 as the weight is M 3 and the acceleration of the vibrating body 25 is α 3 , the above-mentioned V B = S · X
The acting force of F 3 = M 3 · α 3 using the variation of the driving force as the driving source is the pressure in the speaker box 1 and the outside air (the speaker box 1).
The pressure acts on the vibrating body 25 based on the difference between the pressure and the pressure.
【0029】即ち、振動体25のダクト18の有効面積
をSD とした場合に、上述した振動体25に働く作用力
F3 は で表せるので、スピーカ3の音放射力F1 と振動体25
の作用力F3 とを次の(1)式を満足させれば、スピー
カ3の反作用力−F1 と振動体25のスピーカボックス
1の容積VB の変化分に対する可動板20の作用力F3
に対する反作用力−F3 とは互に相殺或は減衰させるこ
とが出来る。That is, when the effective area of the duct 18 of the vibrating body 25 is S D , the acting force F 3 acting on the vibrating body 25 is The sound radiation force F 1 of the speaker 3 and the vibrating body 25
If you ask the acting force F 3 of satisfying the following equation (1), the acting force of the movable plate 20 and the reaction force -F 1 of the speaker 3 for variation in the volume V B of the speaker box 1 of the vibrator 25 F Three
Can causes mutually offset or damping the reaction force -F 3 against.
【0030】F1 +FD1≒F3 ・・・・・(1) ここで、F1 =M1 ・α1 ,FD1=MD1・αD1,F3 =
M3 ・α3 であるのでM1 ・α1 +MD1・αD1≒M3 ・
α3 となる。ここで、MD1はダクト18の空気放射時の
等価質量、αD1はダクト18の開口18aの放射空気の
加速度である。従って、αD1=S/SD ・α1 ,α3 ≒
αD1とすれば として求めることが出来る。従って、振動体25の等価
質量M3 は として求められる。F 1 + F D1 ≒ F 3 (1) where F 1 = M 1 · α 1 , F D1 = M D1 · α D 1 , F 3 =
M 3 · α 3 , so M 1 · α 1 + M D1 · α D1 ≒ M 3 ·
α 3 . Here, MD1 is the equivalent mass of the duct 18 when the air is radiated, and αD1 is the acceleration of the radiated air from the opening 18a of the duct 18. Therefore, α D1 = S / S D · α 1 , α 3 ≒
α D1 Can be obtained as Therefore, the equivalent mass M 3 of the vibrating body 25 is Is required.
【0031】次に、図2を用いて、本発明の他の形態例
を説明する。図2はスピーカボックス1の後面板1Bに
ダクト18を等価質量とする振動体25を配設したもの
である。Next, another embodiment of the present invention will be described with reference to FIG. FIG. 2 shows an arrangement in which a vibrating body 25 having an equivalent mass of the duct 18 is provided on the rear face plate 1B of the speaker box 1.
【0032】本例の場合はスピーカ3は図6と同一構成
であり、スピーカボックス1は図5(A)の斜視図で示
したと同様の可動部20を介してダクトの開口18aが
後面板1Bに穿たれたダクト18を後面板1Bに片持保
持させたものであり、このダクト18は好ましくはスピ
ーカ3の背面、即ち磁気回路を構成するセンタポール6
aの中心とダクト18の中心が一致する様に対向配置さ
せている。In this embodiment, the speaker 3 has the same structure as that of FIG. 6, and the speaker box 1 has a duct opening 18a formed through a movable portion 20 similar to the perspective view of FIG. The rear end of the rear plate 1B is provided with a cantilevered duct 18. The duct 18 is preferably provided on the back of the speaker 3, that is, the center pole 6 constituting a magnetic circuit.
They are arranged to face each other so that the center of a and the center of the duct 18 coincide.
【0033】上述の場合もスピーカ3の振動板10がF
1 で示す方向に駆動された場合、スピーカボックス1内
外の圧力差に基づいて、振動体25は矢印F3 で示す方
向に動かされる。従って、スピーカ3とダクト18を含
む振動体25の夫々の反作用力−F1 並びに−F3 と−
FD1を相殺或は減衰させる為の釣合条件はF1 ≒F3+
FD1として求められる。Also in the above case, the diaphragm 10 of the speaker 3 is F
When driven in the direction indicated by 1, based on the pressure difference of the speaker box 1 and out, the vibrating body 25 is moved in the direction indicated by the arrow F 3. Accordingly, the reaction forces -F 1 and -F 3 and -F 3 of the vibrating body 25 including the speaker 3 and the duct 18 respectively.
The balance condition for canceling or attenuating F D1 is F 1 ≒ F 3 +
It is obtained as F D1 .
【0034】即ち、M1 ・α1 =M3 ・α3 +MD1・α
D1となる。α3 =α1 ,αD1=S/SD ・α1 として、
M1 ・α1 =M3 ・α1 +MD1・S/SD ・α1 からM
3 ・α1 =M1 ・α1 −MD ・S/SD ・α1 =M1 −
MD1・S/SD として振動体25の等価質量M3 を求め
ることが出来る。That is, M 1 · α 1 = M 3 · α 3 + M D1 · α
It becomes D1 . α 3 = α 1 , α D1 = S / S D · α 1
M 1 · α 1 = M 3 · α 1 + M D1 · S / S D · α 1 to M
3 · α 1 = M 1 · α 1 -M D · S / S D · α 1 = M 1 -
M D1 · S / S D as can be obtained equivalent mass M 3 of the vibrator 25.
【0035】図3は本発明の更に他の形態例を示すもの
である。図3の場合はスピーカ3及びスピーカボックス
1の構成は図6と同一である。FIG. 3 shows still another embodiment of the present invention. In the case of FIG. 3, the configurations of the speaker 3 and the speaker box 1 are the same as those in FIG.
【0036】図3ではダクト18の、開口18aと反対
位置に振動体25を付加させたものである。勿論、この
振動体25はダクト18の長手方向のどの位置に嵌着さ
せてもよい。In FIG. 3, a vibrating body 25 is added to the duct 18 at a position opposite to the opening 18a. Of course, the vibrating body 25 may be fitted at any position in the longitudinal direction of the duct 18.
【0037】振動体25は図3及び図5(B)の斜視図
に示す様に合成樹脂等で一体に形成された内周リング2
2と、この内周リング22の外周角を3等分する位置か
ら放射状にコンプライアンスを付与する様に突出させた
可撓性の輻状の或はダンパ或はエッジの様な可動部20
と、この可動部20と内周で連接された外周リング23
とで構成され、この外周リング23の外周には必要に応
じてリング状のウエイトを嵌着して接合させる様にして
もよい。As shown in the perspective views of FIGS. 3 and 5B, the vibrating body 25 has an inner peripheral ring 2 integrally formed of a synthetic resin or the like.
2 and a movable portion 20 such as a flexible radial or damper or edge protruding from a position where the outer peripheral angle of the inner peripheral ring 22 is equally divided into three.
And an outer ring 23 connected to the movable portion 20 on the inner periphery.
A ring-shaped weight may be fitted and joined to the outer periphery of the outer peripheral ring 23 as necessary.
【0038】上述の振動体25の内周リング22の内径
をダクト18の外径と略同一に選択し、ダクト18の外
径に嵌挿して、接合させている。The inner diameter of the inner peripheral ring 22 of the vibrating body 25 is selected to be substantially the same as the outer diameter of the duct 18, and is fitted to and joined to the outer diameter of the duct 18.
【0039】上述の構成のスピーカ装置も、スピーカ3
の振動板10のF1 方向の音放射力に対し、振動体25
ではF3 で示す方向の作用力を生じてスピーカ3の反作
用力−F1 と振動体25の反作用力−F3 を互にキャン
セルすることが出来る。The loudspeaker device having the above-described configuration also includes the loudspeaker 3.
To F 1 direction of the sound radiation force of the diaphragm 10 of the vibrating body 25
In can be generated in the direction of applied force indicated by F 3 which mutually cancel a reaction force -F 3 of the reaction force -F 1 and vibrator 25 of the speaker 3.
【0040】振動体25部分での作用力F3 はダクト1
8の開口18aからの空気の放射力FD1の反作用力−F
D1が加算されたF3 +FD1の作用力が加わることにな
り、図1で説明したと同様にF3 ≒F1 +FD1を満足さ
せる様に成し、振動体25の等価質量はM3 =SD /S
・M1 +MD1を選択すればよい。The acting force F 3 at the vibrating body 25 is equal to that of the duct 1
8 of the reaction force -F radiation force F D1 of the air from the opening 18a
The acting force of F 3 + F D1 to which D1 is added is applied, so that F 3 ≒ F 1 + F D1 is satisfied as described with reference to FIG. 1, and the equivalent mass of the vibrating body 25 is M 3 = S D / S
-M 1 + M D1 may be selected.
【0041】図4は本発明のスピーカ装置の更に他の形
態例を示すものであり、スピーカ3及びスピーカボック
ス1の構成は図1と全く同一構成であるので、対応部分
には同一符号を付して重複説明は省略する。FIG. 4 shows still another embodiment of the speaker device of the present invention. Since the configurations of the speaker 3 and the speaker box 1 are exactly the same as those in FIG. 1, the corresponding parts are denoted by the same reference numerals. Therefore, a duplicate description will be omitted.
【0042】図4の構成ではダクト18内に振動体25
を配設した場合である。このダクト18内に枢着する可
動性の振動板25の構成を図4及び図5(C)で説明す
る。In the configuration shown in FIG.
This is the case where is arranged. The structure of the movable diaphragm 25 pivotally mounted in the duct 18 will be described with reference to FIGS. 4 and 5C.
【0043】本例の振動体25はダクト18の内径と略
々同一外径の外周リング23と中心円盤26の外周を3
等分した角度位置から放射状に突出した可撓性で輻状の
可動部20を有し、この可動部20の先端は外周リング
23の内周に連接され、中心円盤26の中心には透孔2
7が設けられ、合成樹脂等でリング状部材28として一
体に形成される。The vibrating body 25 of this embodiment has an outer ring 23 having an outer diameter substantially equal to the inner diameter of the duct 18 and an outer circumference of the center disk 26 of 3 mm.
It has a flexible and radial movable part 20 protruding radially from an equally divided angular position, the tip of this movable part 20 is connected to the inner periphery of the outer peripheral ring 23, and a through hole is formed at the center of the center disk 26. 2
7 are integrally formed as a ring-shaped member 28 with a synthetic resin or the like.
【0044】上述のリング状部材28の外周リング23
をダクト18の両開口端に嵌着し、接着剤等を介して接
合すると共に略々ダクト長と同一長さの金属性の丸棒等
のウエイト21を中心円盤26の透孔27内に挿入し、
接着剤等で接合することでウエイト21は可動部20を
介してスピーカボックス1の前後(バッフル板2と後面
板1B)方向に揺動可能な振動体25と成される。The outer peripheral ring 23 of the above-mentioned ring-shaped member 28
Are fitted to both open ends of the duct 18 and are bonded via an adhesive or the like, and a weight 21 such as a metal round bar having substantially the same length as the duct is inserted into the through hole 27 of the center disk 26. And
By bonding with an adhesive or the like, the weight 21 forms a vibrating body 25 that can swing in the front and rear directions (the baffle plate 2 and the rear plate 1B) of the speaker box 1 via the movable portion 20.
【0045】上述の構成のスピーカ装置であっても図1
と同様にF1 +FD1≒F3 の釣合式によって、スピーカ
3の音放射力F1 の反作用力−F1 と振動体25の作用
力F3 の反作用力−F3 とを互に相殺可能である。この
場合の振動体25のウエイト21の等価質量M3 は図1
と同様にSD /S(M1 +MD1)に選択することで簡単
に求められる。Even in the speaker device having the above configuration, FIG.
Similarly to the above, by the balance formula of F 1 + F D1 ≒ F 3 , the reaction force −F 1 of the sound radiation force F 1 of the speaker 3 and the reaction force −F 3 of the force F 3 of the vibrating body 25 can be canceled each other. It is. Equivalent mass M 3 of the weight 21 of the vibrator 25 in this case is 1
In the same manner as in the above, it is easily obtained by selecting S D / S (M 1 + M D1 ).
【0046】[0046]
【発明の効果】本発明のスピーカ装置によれば1つのス
ピーカをスピーカボックス内に配し、バッフル板又はス
ピーカボックスの後面板の所定位置に設けたダクトにコ
ンプライアンスを付与するか、可動性の振動体を設ける
だけでスピーカの振動板の音放射力に対する反作用力を
相殺或は減衰可能と成る。特にスピーカボックス中の空
気の圧力変化により可動性の振動体を駆動し、位相反転
用のダクトを介して低音増強を行う様にしているので、
単にダクトをバネ部材の様な可動部で保持するだけでス
ピーカの反作用力を支えることが出来る。According to the loudspeaker apparatus of the present invention, one loudspeaker is disposed in the loudspeaker box, and compliance is imparted to the baffle plate or the duct provided at a predetermined position on the rear panel of the loudspeaker box, or the movable vibration is provided. The reaction force against the sound radiation force of the diaphragm of the speaker can be canceled or attenuated only by providing the body. In particular, since the movable vibrator is driven by the pressure change of the air in the speaker box and the bass is enhanced through the phase inversion duct,
The reaction force of the speaker can be supported simply by holding the duct with a movable part such as a spring member.
【図1】本発明のスピーカ装置の側断面図である。FIG. 1 is a side sectional view of a speaker device of the present invention.
【図2】本発明のスピーカ装置の他の側断面図である。FIG. 2 is another side sectional view of the speaker device of the present invention.
【図3】本発明のスピーカ装置の更に他の側断面図
(I)である。FIG. 3 is still another side sectional view (I) of the speaker device of the present invention.
【図4】本発明のスピーカ装置の更に他の側断面図(I
I)である。FIG. 4 is still another side sectional view of the speaker device of the present invention (I
I).
【図5】本発明のスピーカ装置に用いる振動体の斜視図
である。FIG. 5 is a perspective view of a vibrating body used in the speaker device of the present invention.
【図6】従来のスピーカ装置の側断面図である。FIG. 6 is a side sectional view of a conventional speaker device.
【図7】従来のスピーカ装置の他の側断面図である。FIG. 7 is another side sectional view of a conventional speaker device.
1‥‥スピーカボックス、2‥‥バッフル板、3‥‥ス
ピーカ、18,18b‥‥ダクト、20‥‥可動板、2
1‥‥ウエイト、25‥‥振動体1 speaker box, 2 baffle board, 3 speaker, 18, 18b duct, 20 movable plate, 2
1 ‥‥ weight, 25 ‥‥ vibrator
───────────────────────────────────────────────────── フロントページの続き (72)発明者 阿左見 一男 東京都品川区北品川6丁目7番35号 ソニ ー株式会社内 (72)発明者 広岡 政之 東京都品川区北品川6丁目7番35号 ソニ ー株式会社内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuo Azami 6-7-35 Kita Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (72) Inventor Masayuki Hirooka 6-7-1 Kita Shinagawa, Shinagawa-ku, Tokyo No. 35 Sony Corporation
Claims (4)
ると共に位相反転型のダクトを具備して成るスピーカ装
置であって、 上記ダクトにコンプライアンスを付加させて成ることを
特徴とするスピーカ装置。1. A speaker device having a speaker disposed in a speaker box and having a phase inversion type duct, wherein the duct is provided with compliance.
する前記スピーカボックスの後面板に配設させて成るこ
とを特徴とする請求項1記載のスピーカ装置。2. The speaker device according to claim 1, wherein the duct is disposed on a rear plate of the speaker box facing a back surface of the speaker.
る可動板を介して前記スピーカボックスに保持させて成
ることを特徴とする請求項1又は請求項2記載のスピー
カ装置。3. The speaker device according to claim 1, wherein the duct is held by the speaker box via a movable plate for providing compliance.
アンスを付与する可動板及び等価質量を付与するウエイ
トを有する振動体を嵌着させて成ることを特徴とする請
求項1又は請求項2記載のスピーカ装置。4. The duct according to claim 1, wherein a vibrating body having a movable plate for giving compliance and a weight for giving an equivalent mass is fitted to an outer or inner periphery of the duct. Speaker device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11360698A JPH11308689A (en) | 1998-04-23 | 1998-04-23 | Loudspeaker system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11360698A JPH11308689A (en) | 1998-04-23 | 1998-04-23 | Loudspeaker system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH11308689A true JPH11308689A (en) | 1999-11-05 |
Family
ID=14616488
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11360698A Pending JPH11308689A (en) | 1998-04-23 | 1998-04-23 | Loudspeaker system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH11308689A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008103935A (en) * | 2006-10-18 | 2008-05-01 | Funai Electric Co Ltd | Speaker box |
GB2477020A (en) * | 2010-01-16 | 2011-07-20 | William E Collins | Autoaugmented speaker bass reflex port is compliantly mounted to speaker baffle |
CN108282725A (en) * | 2018-02-14 | 2018-07-13 | 钰太芯微电子科技(上海)有限公司 | A kind of public address system and audio player of integrated back of the body cavity pressure perception |
WO2020070542A1 (en) * | 2018-10-03 | 2020-04-09 | Saati S.P.A. | Acoustical protector for audio devices and audio device provided with said protector |
-
1998
- 1998-04-23 JP JP11360698A patent/JPH11308689A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008103935A (en) * | 2006-10-18 | 2008-05-01 | Funai Electric Co Ltd | Speaker box |
GB2477020A (en) * | 2010-01-16 | 2011-07-20 | William E Collins | Autoaugmented speaker bass reflex port is compliantly mounted to speaker baffle |
CN108282725A (en) * | 2018-02-14 | 2018-07-13 | 钰太芯微电子科技(上海)有限公司 | A kind of public address system and audio player of integrated back of the body cavity pressure perception |
CN108282725B (en) * | 2018-02-14 | 2024-01-16 | 钰太芯微电子科技(上海)有限公司 | Integrated back cavity pressure sensing sound amplifying system and audio player |
WO2020070542A1 (en) * | 2018-10-03 | 2020-04-09 | Saati S.P.A. | Acoustical protector for audio devices and audio device provided with said protector |
US11330382B2 (en) | 2018-10-03 | 2022-05-10 | Saati S.P.A. | Acoustical protector for audio devices and audio device provided with said protector |
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