JPH03274995A - Speaker - Google Patents

Speaker

Info

Publication number
JPH03274995A
JPH03274995A JP7640590A JP7640590A JPH03274995A JP H03274995 A JPH03274995 A JP H03274995A JP 7640590 A JP7640590 A JP 7640590A JP 7640590 A JP7640590 A JP 7640590A JP H03274995 A JPH03274995 A JP H03274995A
Authority
JP
Japan
Prior art keywords
sound
section
back cabinet
opening
speaker
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
JP7640590A
Other languages
Japanese (ja)
Inventor
Takayuki Miyanishi
宮西 隆幸
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.)
NEC Home Electronics Ltd
NEC Corp
Original Assignee
NEC Home Electronics Ltd
Nippon Electric Co Ltd
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 NEC Home Electronics Ltd, Nippon Electric Co Ltd filed Critical NEC Home Electronics Ltd
Priority to JP7640590A priority Critical patent/JPH03274995A/en
Publication of JPH03274995A publication Critical patent/JPH03274995A/en
Pending legal-status Critical Current

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  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)

Abstract

PURPOSE:To increase the sound pressure level of a sound radiating externally from a boat section and to improve the low-pitched sound characteristic by forming a front face of a back cabinet to be a projecting curved face and forming a sound guide in the front direction gradually spread toward the end. CONSTITUTION:A sound radiating from an opening 4a of a sound guide 4 and diffracted toward a front face 3a of a back cabinet section 2 is reflected in the front face 3a in the backward tangential line direction, the reflection to the opening 3a is prevented and the interference of sound radiating from the opening 3a externally is eliminated to improve the characteristic for medium and high frequencies. Moreover, the sound guide 4 is formed spread gradually toward the end from the mount position to the opening 4a, and the impedance matching between the mechanical resistance of the mount position of a speaker main body 2 and the air resistance in the sound guide 4 is easily taken, then the sound pressure level is improved. Furthermore, since the sound pressure radiating to the back cabinet 2 and exerted to the boat section 5 is strengthened, the low frequency characteristic is improved.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はスピーカーに関し、特に、低音から高音の全音
域に渡る特性の向上及び音圧レベルの向上を図るスピー
カーに係る。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a speaker, and particularly to a speaker that improves characteristics over the entire range from bass to treble and improves sound pressure level.

〔従来技術〕[Prior art]

この種スピーカーとしては、第5図乃至第8図に示すも
のがある。このスピーカー21はテレビジョンに使用さ
れるものであり、平面に形成された前面23aにスピー
カー本体22を設けたバックキャビネット部23と、バ
ックキャビネ、ト部23の前面23aから延出する音導
部24とから構成されており、音導部24は音導ホーン
部24A及び音導筒部24Bから形成される。音導ホー
ン部24Aはスピーカー本体22から前方に向けて漸次
末広がりに形成され、前部で音導筒部24Bと連通して
いる。音導筒部24Bは前方に向けて同幅に形成され前
部に開口部24bが形成されている。また、上記キャビ
ネット部23内には後面に開口部を有するポート部25
が設けられている。
As this type of speaker, there are those shown in FIGS. 5 to 8. This speaker 21 is used for a television, and includes a back cabinet section 23 having a speaker main body 22 on a flat front surface 23a, and a sound guide section extending from the front surface 23a of the back cabinet and top section 23. 24, and the sound guide section 24 is formed from a sound guide horn section 24A and a sound guide tube section 24B. The sound guide horn portion 24A is formed to gradually widen toward the front from the speaker body 22, and communicates with the sound guide tube portion 24B at the front portion. The sound guide cylinder part 24B is formed to have the same width toward the front, and has an opening 24b formed in the front part. In addition, a port section 25 having an opening on the rear surface is provided in the cabinet section 23.
is provided.

〔考案が解決しようとする課題〕[The problem that the idea aims to solve]

ところで、上記のものはバックキャビネット部23が縦
H1横W、臭行きDの寸法比が割り切れる値、例えば、
2:14に設定されると第6図乃至第8図に示すように
、スピーカー本体22(音源S)から発生された音の進
行波Fがバックキャビネット部23の内壁で反射して反
射波Bが生じ、進行波Fと反射波Bとの干渉で定在波が
発生して共振するため、スピーカー本体22から出力さ
れる音の音圧レベルが低下するばかりでなく、ポート部
25から出力される音の低音特性が劣化する。
By the way, in the above case, the back cabinet part 23 has a divisible value of the dimension ratio of length H1 width W and smell direction D, for example,
When set to 2:14, as shown in FIGS. 6 to 8, the traveling wave F of the sound generated from the speaker body 22 (sound source S) is reflected by the inner wall of the back cabinet section 23 and becomes a reflected wave B. occurs, a standing wave is generated due to interference between the traveling wave F and the reflected wave B, and resonance occurs, which not only reduces the sound pressure level of the sound output from the speaker body 22 but also causes the sound to be output from the port section 25. The bass characteristics of the sound deteriorate.

また、バックキャビネット部23の前面23aが平面に
形成されているが、このようにバックキャビネット部2
3の前面23が平面に形成されていると、第5図矢印に
示すように音導筒部24Bの開口部24bから出力され
後方に向けて回折した音が前面23aで前方に向けて反
射し、開口部24bから出力された音と干渉するので、
中高域の特性が劣化する。
Further, although the front surface 23a of the back cabinet section 23 is formed flat, the back cabinet section 23 is
If the front surface 23 of 3 is formed flat, the sound output from the opening 24b of the sound guide tube 24B and diffracted toward the rear will be reflected toward the front at the front surface 23a, as shown by the arrow in FIG. , because it interferes with the sound output from the opening 24b.
The mid-high range characteristics deteriorate.

さらに、音導部24は音導筒部24Bが同幅に形成され
ているが、このような音導筒部24Bがあると、スピー
カー本体22の取付位置の機械抵抗と、音導部24内の
空気抵抗とのインピーダンスマツチングが取れず音の変
換効率が悪くなるため、音圧レベルが低下する。
Furthermore, although the sound guide section 24 is formed with the same width as the sound guide tube section 24B, having such a sound guide tube section 24B increases the mechanical resistance at the mounting position of the speaker body 22 and the inside of the sound guide section 24. Impedance matching with air resistance is not achieved and sound conversion efficiency deteriorates, resulting in a decrease in sound pressure level.

本発明は上記実情に鑑みて創案されたものであって、低
音域から高音域の全音域に渡って特性に秀れ、かつ、音
圧レベルの高いスピーカーを提供しようとするものであ
る。
The present invention was devised in view of the above-mentioned circumstances, and it is an object of the present invention to provide a speaker that has excellent characteristics over the entire range from bass to treble and has a high sound pressure level.

〔課題を解決するための手段〕[Means to solve the problem]

本発明は上記目的を達成するために、前面にスピーカー
本体を設けたバックキャビネット部と、バックキャビネ
ット部の前面から前方に延出し前部に開口部を有する音
導部とを備えたスピーカーにおいて、上記バックキャビ
ネット部は縦、横、奥行きの寸法比を定在波が発生しな
い値に設定して形成するとともに前面を凸状曲面に形成
し、さらに上記音導部を前方に向けて漸次末広がりに形
成して構成した。
In order to achieve the above-mentioned object, the present invention provides a speaker including a back cabinet section provided with a speaker main body on the front surface, and a sound guide section extending forward from the front surface of the back cabinet section and having an opening in the front section. The back cabinet section is formed by setting the vertical, horizontal, and depth dimension ratios to values that do not generate standing waves, and the front surface is formed into a convex curved surface, and the sound guiding section is gradually expanded toward the front. Formed and composed.

また、前記バックキャビネット部にはポート部が設けら
れることが好ましい。
Further, it is preferable that the back cabinet section is provided with a port section.

〔作用〕[Effect]

本発明の構成によれば、スピーカー本体かう出力された
音は音導部を通し開口部から外部に波動するとともにバ
ックキャビネット部内に波動するが、バックキャビネッ
ト部は縦、横、奥行きの寸法比が定在波が発生しない値
に設定して形成されており、バックキャビネット部内に
波動した音はバックキャビネット内で乱反射して定在波
の発生による共振が防止されるので、スピーカー本体か
ら出力される音の音圧レベルが向上し、また、バックキ
ャビネット部の前面は曲面に形成されており音導部の開
口部から出力されてバックキャビネット部の前面に回折
した音はバックキャビネット部の前面で後方接線方向に
向けて反射して開口部側への反射が防止され、開口部か
ら出力される音との干渉がなくなるので、中高音域の特
性が向上し、さらに、音導部は前方に向けて漸次末広が
りに形成されておりスピーカー本体の取付部位の機械抵
抗と音導部内の空気抵抗とのインピーダンスマツチング
が取りやすくなるので、音の変換効率がよくなりスピー
カー本体から出力される音の音圧レベルが向上する。
According to the configuration of the present invention, the sound output from the speaker body passes through the sound guide part and waves outward from the opening, and also waves inside the back cabinet part, but the back cabinet part has a dimensional ratio of height, width, and depth. It is set to a value that does not generate standing waves, and the sound that waves inside the back cabinet is diffusely reflected within the back cabinet, preventing resonance due to the generation of standing waves, so it is output from the speaker body. The sound pressure level of the sound has been improved, and the front surface of the back cabinet section is formed into a curved surface, so that the sound output from the opening of the sound guide section and diffracted to the front surface of the back cabinet section is reflected back at the front surface of the back cabinet section. The sound is reflected in the tangential direction, preventing reflection toward the aperture, eliminating interference with the sound output from the aperture, improving the characteristics of the mid-to-high range, and furthermore, the sound guide section is directed forward. It is formed to gradually widen at the end, making it easier to match the impedance between the mechanical resistance of the mounting part of the speaker body and the air resistance inside the sound guide, improving the sound conversion efficiency and reducing the sound output from the speaker body. Pressure level increases.

また、バックキャビネット部内で定在波の発生による音
の干渉がないことにより、ポート部に加わる音圧が強く
なるので、ポート部から出力される音の音圧レベルが向
上し低音特性が向上する。
Additionally, since there is no sound interference due to the generation of standing waves within the back cabinet section, the sound pressure applied to the port section becomes stronger, which improves the sound pressure level of the sound output from the port section and improves bass characteristics. .

〔実施例〕〔Example〕

本発明を図面に示された一実施例に基づいて説明する。 The present invention will be explained based on an embodiment shown in the drawings.

第1図は全体斜視図、第2図乃至第4図はそれぞれバッ
クキャビネット部の縦、横、奥行きの寸法比と音の反射
との関係を示す特性説明図である。
FIG. 1 is an overall perspective view, and FIGS. 2 to 4 are characteristic explanatory diagrams showing the relationship between the length, width, and depth dimension ratios of the back cabinet section and sound reflection.

スピーカーlはテレビジョンに使用されるものであり、
前面3aにスピーカー本体2を設けたバックキャビネッ
ト部3と、バックキャビネット部3の前面3aから前方
に延出して設けられた音導部4とから構成されている。
Speaker l is used for television,
It is composed of a back cabinet section 3 having a speaker body 2 provided on its front surface 3a, and a sound guide section 4 extending forward from the front surface 3a of the back cabinet section 3.

音導部4はスピーカー本体2の取付位置から前方に向け
て漸次末広がりに形成されており、前部に開口部4aが
形成されている。すなわち、音導部4は従来例のものか
ら音導筒部を削除した形状に形成されている。
The sound guiding portion 4 is formed to gradually widen toward the front from the mounting position of the speaker body 2, and has an opening 4a formed in the front portion. That is, the sound guiding section 4 is formed in a shape similar to that of the conventional example by omitting the sound guiding tube section.

上記バックキャビネット部3は、縦H1横W1奥行きD
の寸法比が割切れない値、すなわち、進行波Fと反射波
Bとが干渉せずに定在波が発生しない値、例えば第2図
及び第4図に示すように、H:W:D=1.3 : 1
 : 1.2に設定されて形成されている。また、この
バックキャビネット3の前面は凸状球面に形成されてい
る。
The back cabinet part 3 has a length of H1, a width of W1, and a depth of D.
A value in which the size ratio of is not divisible, that is, a value in which the traveling wave F and the reflected wave B do not interfere and a standing wave is not generated, for example, as shown in FIGS. 2 and 4, H:W:D =1.3 : 1
: It is set to 1.2 and formed. Further, the front surface of this back cabinet 3 is formed into a convex spherical surface.

さらに上記バックキャビネット部3内には後面に開口部
を有するポート部5が設けられている。
Furthermore, a port section 5 having an opening on the rear surface is provided in the back cabinet section 3.

かかる構成において、スピーカー本体2から出力される
音は音導部4を通し開口部4aから外部に波動するとと
もに、バックキャビネット部3内に波動するが、バック
キャビネット部3内に波動した進行波Fはバックキャビ
ネット3の内壁で反射して反射波Bとなるが、進行波F
と反射波Bとの間で干渉がなく定在波の発生が防止され
るので、スピーカー本体2から出力される音の音圧レベ
ルが向上し、また、音導部4の開口部4aから波動して
バックキャビネット部2の前面3aに向けて回折した音
は前面3aで後方接線方向に向けて反射しく第1図矢印
参照)開口部3a側への反射が防止され、開口部3aか
ら外部に波動する音との干渉がなくなるので、中高域の
特性が向上し、さらに、音導部4はスピーカー本体2の
取付位置から開口部4aに向けて漸次末広がりに形成さ
れており、スピーカー本体2の取付部位の機械抵抗と音
導部4内の空気抵抗とのインピーダンスマツチングが取
りやすいので、スピーカー本体2から出力される音の変
換効率が向上して音圧レベルが向上する。
In this configuration, the sound output from the speaker body 2 passes through the sound guide section 4 and waves outward from the opening 4a, and also waves inside the back cabinet section 3. is reflected by the inner wall of the back cabinet 3 and becomes a reflected wave B, but the traveling wave F
Since there is no interference between the reflected wave B and the reflected wave B, and the generation of standing waves is prevented, the sound pressure level of the sound output from the speaker body 2 is improved, and the wave is transmitted from the opening 4a of the sound guide section 4. The sound diffracted toward the front surface 3a of the back cabinet section 2 is reflected in the rear tangential direction at the front surface 3a. Since there is no interference with the waving sound, the mid-high range characteristics are improved.Furthermore, the sound guide section 4 is formed to gradually widen from the mounting position of the speaker body 2 toward the opening 4a, so that Since the impedance matching between the mechanical resistance of the mounting portion and the air resistance within the sound guide section 4 is easily achieved, the conversion efficiency of the sound output from the speaker body 2 is improved and the sound pressure level is improved.

また、バックキャビネット部2内で定在波の干渉がない
ことにより、バックキャビネット部2内に波動してポー
ト部5に加わる音の音圧が強くなるので、ポート部5か
ら外部に波動する音の音圧レベルの低下がなく低音特性
が向上する。
In addition, since there is no standing wave interference within the back cabinet section 2, the sound pressure of the sound that waves inside the back cabinet section 2 and is applied to the port section 5 becomes stronger, so that the sound that waves from the port section 5 to the outside increases. Bass characteristics are improved without reducing the sound pressure level.

なお、上記実施例では、バックキャビネット部2の縦H
1横W、奥行きDの寸法比を定在波が発生しない値とし
て、H:W:D=1.2 : 1 : l。
In the above embodiment, the vertical H of the back cabinet section 2 is
H:W:D=1.2:1:l, assuming that the dimensional ratio of 1 width W and depth D is a value that does not generate standing waves.

3に設定したが、これに限定されるものではない。Although it is set to 3, it is not limited to this.

例えば、横W、縦H1奥行きDの寸法比をH:W:D=
1. 9  :  1  :  1. 3H:W:D=
2. 4  :  l  :  1. 7H:W:D=
3. 311. 7 等の値に設定してもよく、要はキャビネット部2内で定
在波の発生しない値に設定されていればよい。
For example, the size ratio of horizontal W, vertical H1 and depth D is H:W:D=
1. 9:1:1. 3H:W:D=
2. 4: l: 1. 7H:W:D=
3. 311. It may be set to a value such as 7. In short, it is sufficient that the value is set to a value that does not generate standing waves within the cabinet section 2.

〔発明の効果〕〔Effect of the invention〕

以上の説明から明らかなように、本発明によれば、スピ
ーカー本体から出力された音は音導部を通し開口部から
外部に波動するとともに、バックキャビネット部内に波
動するが、バックキャビネット部内に波動した音はバッ
クキャビネット内で反射した音との干渉がなく、定在波
の発生が防止されるので、スピーカー本体から出力され
る音の音圧レベルを向上させることができ、また、音導
部の開口部から外部に波動してバックキャビネット部の
前面に回折した音はバックキャビネット部の凸状球面に
形成された前面で後方接線方向に向けて反射し開口部側
への反射が防止されることにより、開口部から外部に波
動する音との干渉がなくなるので、中高域の特性を向上
させることができ、さらに、スピーカー本体の取付部位
の機械抵抗とスピーカー本体の取付位置から前方に向け
て漸次末広がりに形成された音導部内の空気抵抗とのイ
ンピーダンスマツチングが取りやすいので、スピーカー
本体から出力される音の変換効率がよくなり音圧レベル
を向上させることができる。
As is clear from the above description, according to the present invention, the sound output from the speaker body passes through the sound guide section and waves outward from the opening, and also waves inside the back cabinet section. The generated sound does not interfere with the sound reflected inside the back cabinet, and the generation of standing waves is prevented, so the sound pressure level of the sound output from the speaker body can be improved. The sound that waves outward from the opening and is diffracted to the front of the back cabinet is reflected in the rear tangential direction by the front surface formed on the convex spherical surface of the back cabinet, preventing reflection toward the opening. By doing so, there is no interference with the sound waves oscillating externally through the opening, which improves the characteristics of the mid-high range.Furthermore, the mechanical resistance of the mounting area of the speaker body and the resistance from the mounting position of the speaker body toward the front can be improved. Since impedance matching with the air resistance in the sound guide section, which is formed to gradually widen at the end, is easily achieved, the conversion efficiency of the sound output from the speaker body is improved, and the sound pressure level can be improved.

また、バックキャビネット部内に波動してポート部に加
わる音の音圧が強くなることにより、ポート部から外部
に波動する音の音圧レベルが強くなるので、より一層低
音特性を向上させることができる。
Additionally, by increasing the sound pressure of the sound that waves inside the back cabinet and is applied to the port, the sound pressure level of the sound that waves outside from the port becomes stronger, making it possible to further improve bass characteristics. .

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

図面は本発明に関するスピーカーの一実施例を示し、第
1図は全体斜視図、第2図乃至第4図はそれぞれバック
キャビネット部の縦、横、奥行きの寸法比と音の反射と
の関係を示す特性説明図、第5図乃至第8図は従来例を
示し、第5図は全体斜視図、第6図乃至第8図はそれぞ
れバックキャビネット部の縦、横、奥行きの寸法比と音
の反射との関係を示す特性説明図である。 (主要部分を示す図面の簡単な説明) l・・スピーカー    2・・スピーカー本体3・・
バックキャビネット部   3a・・前面4・・音導部
      4a・・開口部5・・ポート部
The drawings show one embodiment of the speaker according to the present invention, and FIG. 1 is an overall perspective view, and FIGS. 2 to 4 each show the relationship between the vertical, horizontal, and depth dimensional ratios of the back cabinet part and sound reflection. Figures 5 to 8 show the conventional example, Figure 5 is an overall perspective view, and Figures 6 to 8 illustrate the ratio of the vertical, horizontal, and depth dimensions of the back cabinet and the sound. FIG. 3 is a characteristic explanatory diagram showing a relationship with reflection. (Brief explanation of the drawing showing the main parts) l...Speaker 2...Speaker body 3...
Back cabinet part 3a...Front side 4...Sound guide part 4a...Opening part 5...Port part

Claims (2)

【特許請求の範囲】[Claims] (1)前面にスピーカー本体を設けたバックキャビネツ
ト部と、バックキャビネット部の前面から前方に延出し
前部に開口部を有する音導部とを備えたスピーカーにお
いて、上記バックキャビネット部は縦、横、奥行きの寸
法比を定在波が発生しない値に設定して形成するととも
に前面を凸状曲面に形成し、さらに上記音導部を前方に
向けて漸次末広がりに形成したことを特徴とするスピー
カー。
(1) In a speaker equipped with a back cabinet section having a speaker main body on the front surface, and a sound guide section extending forward from the front surface of the back cabinet section and having an opening in the front section, the back cabinet section is vertically arranged. It is characterized by being formed by setting the dimensional ratio of width and depth to a value that does not generate standing waves, and forming the front surface to have a convex curved surface, and further forming the sound guiding part to gradually widen toward the front. speaker.
(2)前記バックキャビネツト部にはポート部が設けら
れたことを特徴とする請求項1記載のスピーカー。
(2) The speaker according to claim 1, wherein the back cabinet section is provided with a port section.
JP7640590A 1990-03-26 1990-03-26 Speaker Pending JPH03274995A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7640590A JPH03274995A (en) 1990-03-26 1990-03-26 Speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7640590A JPH03274995A (en) 1990-03-26 1990-03-26 Speaker

Publications (1)

Publication Number Publication Date
JPH03274995A true JPH03274995A (en) 1991-12-05

Family

ID=13604350

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7640590A Pending JPH03274995A (en) 1990-03-26 1990-03-26 Speaker

Country Status (1)

Country Link
JP (1) JPH03274995A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022547321A (en) * 2019-09-20 2022-11-11 広州視源電子科技股▲分▼有限公司 Electronics

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5994991A (en) * 1982-11-22 1984-05-31 Mitsubishi Electric Corp Speaker device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5994991A (en) * 1982-11-22 1984-05-31 Mitsubishi Electric Corp Speaker device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022547321A (en) * 2019-09-20 2022-11-11 広州視源電子科技股▲分▼有限公司 Electronics

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