JPS58121895A - Enclosure - Google Patents

Enclosure

Info

Publication number
JPS58121895A
JPS58121895A JP434582A JP434582A JPS58121895A JP S58121895 A JPS58121895 A JP S58121895A JP 434582 A JP434582 A JP 434582A JP 434582 A JP434582 A JP 434582A JP S58121895 A JPS58121895 A JP S58121895A
Authority
JP
Japan
Prior art keywords
space
air
chamber
resonance
small
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
Application number
JP434582A
Other languages
Japanese (ja)
Inventor
Akimichi Keido
慶藤 明通
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to JP434582A priority Critical patent/JPS58121895A/en
Publication of JPS58121895A publication Critical patent/JPS58121895A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00Details of transducers, loudspeakers or microphones
    • H04R1/20Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807Enclosures comprising vibrating or resonating arrangements
    • H04R1/2815Enclosures comprising vibrating or resonating arrangements of the bass reflex type
    • H04R1/2819Enclosures comprising vibrating or resonating arrangements of the bass reflex type for loudspeaker transducers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00Details of transducers, loudspeakers or microphones
    • H04R1/20Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807Enclosures comprising vibrating or resonating arrangements
    • H04R1/2815Enclosures comprising vibrating or resonating arrangements of the bass reflex type
    • H04R1/2823Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material
    • H04R1/2826Vents, i.e. ports, e.g. shape thereof or tuning thereof with damping material for loudspeaker transducers

Abstract

PURPOSE:To attain small sized device, by providing a small space of Venturi construction for a phase inverting type enclosure used for acoustic reproduction, providing a resonance space with a back air chamber at the inside and using the Venturi effect. CONSTITUTION:A chamber is sectioned into a back air chamber 7 incorporating a speaker and a resonance space 8 at a section plate 6, and a small space 9 of Venturi construction is provided to move air from the chamber 7 to the space 8. In operating the speaker, air is moved from the space 9 with the vibration of a diaphragm and inverted phase sound waves are outputted after being convert- ed positive phase sound waves with Helmholz resonance of the space 8. The elasticity of the air of the chamber 7 is adjusted with the air resistance due to the Venturi effect of the space 9 and an optimum load is applied to the diaphragm. Since the elasticity of the air of the chamber 7 is adjusted, then considerable small size is attained.

Description

【発明の詳細な説明】 本発明は音響再生に用いる位相反転型エンクロージャの
小型小容積化に関するO スピーカーをエンクロージャに装着し、動作させ九とき
振動板より放射され念音波は前面が正相音波、背面が逆
相音波となりて、いるが、この振動板の撮動の交めにエ
ンクロージャ内の気圧は上がったり下がりたりする。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the miniaturization and small volume of a phase inversion type enclosure used for sound reproduction. The rear surface is an out-of-phase sound wave, and the air pressure inside the enclosure rises and falls as the diaphragm is photographed.

そして、この気圧の上下の度合はエンクロージャ内の容
積が小さいほど大きくなる。
The degree of rise and fall in this atmospheric pressure increases as the volume inside the enclosure decreases.

つまり、空気が弾性をもちはじめ、この弾性はエンクロ
ージャ内の容積が小さいほど大きくなる0−tcで、こ
のエンクロージャに穴をあけておくとエンクロージャ内
部と外部に気圧差を生じ、この穴より空気が出入りする
0また、空気は管等を通路として設け、途中をくびれさ
せておくと、くびれたか所より急激に速度を増す性質を
もりているが、この性質(現象)はベンチ、リー効果と
して知られ、くびれた通路の構造はベンチ、リー構造と
して知られている。
In other words, air begins to have elasticity, and this elasticity increases as the volume inside the enclosure decreases (0-tc).If a hole is made in this enclosure, a pressure difference will be created between the inside and outside of the enclosure, and air will flow through this hole. 0 In addition, if air is passed through a pipe or the like with a constriction in the middle, it has the property of rapidly increasing its velocity at the constriction point, and this property (phenomenon) is known as the Bench and Lee effect. This constricted passageway structure is known as a Bench-Lee structure.

また、位相反転型エンクロージャは、その内部に共鳴空
間が設けられ、その空間のへルムホルツ共鳴を利用して
逆相音波を正相音波に変換して利用しているが、その共
鳴空間の共振周波数は低くなるほど共鳴空間容積が大き
くなる。
In addition, a phase inversion type enclosure has a resonant space inside, and utilizes Helmholtz resonance in that space to convert negative phase sound waves into positive phase sound waves, but the resonant frequency of that resonant space The lower the value, the larger the resonance space volume becomes.

従来の位相反転型エンクロージャは、より低い低音を再
生しようとすると、その共鳴空間の容積は大きくしなけ
ればならないが、小型エンクロージャでは共鳴空間の容
積が大きくなりすぎると、バッフル効果がなくなりスピ
ーカー振動板に負荷がかからないばかりか、位相変換の
効果もなくなるという欠点がありた〇 本発明はベンチュリー効果を利用することによりてエン
クロージャを小型化し、スピーカーの性能を最大限に引
き出そうとしてなされた。
In a conventional phase-inversion type enclosure, in order to reproduce lower bass frequencies, the volume of the resonant space must be increased, but in a small enclosure, if the volume of the resonant space becomes too large, the baffle effect disappears and the speaker diaphragm This invention had the disadvantage that not only no load was placed on the speaker, but also the effect of phase conversion was lost.The present invention was made in an attempt to miniaturize the enclosure and maximize the performance of the speaker by utilizing the Venturi effect.

以下、ベンチュリー効果利用の本発明エンクロージャを
、実施例をおって説明する。
Hereinafter, the enclosure of the present invention utilizing the Venturi effect will be explained with reference to examples.

本発明エンクロージャは、仕切板6でスピーカーを内蔵
する背面空気室7、共鳴空間8とに分けられ、背面空気
室7より共鳴空間8へ空気が出入りするように、ペンチ
ーリー構造の形状をもつ小空間9が設けられている。
The enclosure of the present invention is divided into a rear air chamber 7 containing a speaker and a resonance space 8 by a partition plate 6, and the small space has a Pencilley structure shape so that air can flow in and out from the rear air chamber 7 to the resonance space 8. 9 is provided.

本発明エンクロージャに、スピーカーを装着し動作させ
たとさ、背面空気室7と共鳴空間8とが分けられ、小空
間9が設けられているから、振動板が撮動すると、撮動
によって背面空気室7と共鳴空間8とに気圧差を生じて
、小空間9より空気が出入りする。
When a speaker is installed and operated in the enclosure of the present invention, the rear air chamber 7 and the resonance space 8 are separated and a small space 9 is provided, so that when the diaphragm is photographed, the rear air chamber is A pressure difference is created between the resonance space 7 and the resonance space 8, and air enters and exits from the small space 9.

このとき振動板より放射された逆相音波は、小空間9よ
り出てゆき共鳴空間8のへルムポルッ共鳴にようて正相
音波に変換され放出される。
At this time, the negative phase sound waves radiated from the diaphragm exit from the small space 9, are converted into normal phase sound waves by the Helmpol resonance of the resonance space 8, and are emitted.

また、小空間9の形状はベンチーリー構造となりている
ので、空気の出入り時におきる、ベンチ−リー効果によ
る空気抵抗で、背面空気室7の空気の弾性は調節され振
動板に最適な負荷がかがる。
In addition, since the small space 9 has a Benchley structure, the elasticity of the air in the rear air chamber 7 is adjusted by the air resistance due to the Benchley effect that occurs when air enters and exits, and the optimal load is applied to the diaphragm. Ru.

そして、この小空間9によりておきるペンチーリー効果
によりて、背面空気室7の空気の弾性が調節できるので
、大幅な小型化が可能となうてい乙。
The elasticity of the air in the rear air chamber 7 can be adjusted by the Pencilley effect created by this small space 9, making it possible to significantly downsize the device.

また、この小空間9は外側に設けることもできる0実施
例第4図の本発明エンクロージャでは、外側にベンチー
リー構造の小空間9をもりている。
Further, this small space 9 can also be provided on the outside.The enclosure of the present invention shown in FIG.

スピーカー取付板をはずしてみれば、形状も動作も従来
の位榴反転型エンクロージャと同じであるが、小空間9
によるベンチ、リー効果により、大幅に小型化されてお
り、位相変換され次音波はこの小空間9より放出される
If you remove the speaker mounting plate, you will notice that the shape and operation are the same as the conventional inverted enclosure, but it does not require much space.
Due to the Bench and Lie effect, the size has been significantly reduced, and the next sound wave is phase-converted and emitted from this small space 9.

第6図ないし第11図は、ベンチーリー構造の小空間の
形状の例である。
FIGS. 6 to 11 are examples of the shapes of small spaces in the Benchili structure.

この小空間の形状は、任意のが、所がくびれているか、
または背面空気室側の開口面積が共鳴空間側開口面積よ
り大きい。外側に設けられる場合、その形状は任意のか
所がくびれ工いるか、または外側開口面積が内側開口面
積より小さい0このような小φ間の形状となるように、
仕切板などの端部は加工される0第6図ないし第11図
はその例である。
The shape of this small space can be arbitrary, but it may be constricted in places or
Or the opening area on the rear air chamber side is larger than the opening area on the resonance space side. When provided on the outside, the shape may be constricted at arbitrary points, or the outside opening area may be smaller than the inside opening area.
FIGS. 6 to 11 are examples of how the ends of partition plates and the like are processed.

本発明エンクロージャにおいては、エンクロージャの形
状を問わず、背面空気室と共鳴空間が分けられ、ベンチ
ュリー効果を生じる小空間が、背面空気室と共鳴空間と
の間、または外側にあるということである。
In the enclosure of the present invention, the back air chamber and the resonant space are separated regardless of the shape of the enclosure, and the small space that produces the Venturi effect is located between or outside the back air chamber and the resonant space.

従来の位相反転型エンクロージャでは、小型の場合共鳴
空間容積を犬きくとれないが、本発明エンクロージャに
よる方式では、仕切板で背面空気室と共鳴空間とに分け
、ベンチュリー効果によって弾性を調節するから、共鳴
空間容積が大きくとれ大幅に小型化できるという利点が
ある0第1図ないし第5図、第12図第13図はその例
である。
Conventional phase-inversion type enclosures cannot keep up the volume of the resonance space when the enclosure is small, but the enclosure of the present invention uses a partition plate to separate the rear air chamber and the resonance space, and uses the Venturi effect to adjust the elasticity. 1 to 5, FIG. 12, and FIG. 13 are examples of this, which have the advantage of having a large resonance space volume and being able to be significantly miniaturized.

従来の位相反転型エンクロージャは、38cM口径のス
ピーカーを使用し友場合、内′容積は150〜300リ
ツトルを必要とし友のであるが、本発明エンクロージャ
では30〜401Jy)ルで同等の性能を得ることがで
きるOlた、構造が簡単で小型であるから製造コストを
下げることができる。
Conventional phase-inverting enclosures require an internal volume of 150 to 300 liters when using a 38 cM caliber speaker, but the enclosure of the present invention can achieve the same performance with 30 to 401 liters. In addition, since the structure is simple and compact, manufacturing costs can be reduced.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図、第2図、第4図、第12図は断面図0第3図は
第1図、第2図の正面図。第5図は第4図の、第13図
は第12図の正面図。 第6図な諭し第11図は小空間の形状を示す断面図と、
仕切板端一〇形状を示す断面図。 12は仕切板端部に対しての平行面で後面板などの一部
分がこれにあ危る。 1、スピーカー取付板  λ上面板 3、側面板  4.下面板  5後面板6、仕切板  
10.スピーカー取付穴11、小空間を形成するさん 
13.仕切板端部特許出願人 慶 藤 明 填
FIGS. 1, 2, 4, and 12 are cross-sectional views; FIG. 3 is a front view of FIGS. 1 and 2; FIG. FIG. 5 is a front view of FIG. 4, and FIG. 13 is a front view of FIG. 12. Figure 6 is a reminder, Figure 11 is a sectional view showing the shape of the small space,
Sectional view showing the shape of the partition plate end 10. Reference numeral 12 denotes a plane parallel to the end of the partition plate, and a portion of the rear plate etc. is in danger. 1.Speaker mounting plate λTop plate 3.Side plate 4. Bottom plate 5 Rear plate 6, Partition plate
10. Speaker mounting hole 11, forming a small space
13. Partition plate end patent applicant: Akira Keifuji

Claims (1)

【特許請求の範囲】[Claims] ベンチュリー構造の形状の小空間をもつことを特徴とし
て、内部に背面空気室と共鳴空間をもちベンチュリー効
果を利用して小型化され友エンクロージャ
It is characterized by having a small space in the shape of a Venturi structure, and has a rear air chamber and resonance space inside, and is miniaturized by utilizing the Venturi effect.
JP434582A 1982-01-13 1982-01-13 Enclosure Pending JPS58121895A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP434582A JPS58121895A (en) 1982-01-13 1982-01-13 Enclosure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP434582A JPS58121895A (en) 1982-01-13 1982-01-13 Enclosure

Publications (1)

Publication Number Publication Date
JPS58121895A true JPS58121895A (en) 1983-07-20

Family

ID=11581831

Family Applications (1)

Application Number Title Priority Date Filing Date
JP434582A Pending JPS58121895A (en) 1982-01-13 1982-01-13 Enclosure

Country Status (1)

Country Link
JP (1) JPS58121895A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4628528A (en) * 1982-09-29 1986-12-09 Bose Corporation Pressure wave transducing
EP0435337A2 (en) * 1989-12-29 1991-07-03 Yamaha Corporation Acoustic apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4628528A (en) * 1982-09-29 1986-12-09 Bose Corporation Pressure wave transducing
EP0435337A2 (en) * 1989-12-29 1991-07-03 Yamaha Corporation Acoustic apparatus

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