JPS6138680B2 - - Google Patents
Info
- Publication number
- JPS6138680B2 JPS6138680B2 JP53099851A JP9985178A JPS6138680B2 JP S6138680 B2 JPS6138680 B2 JP S6138680B2 JP 53099851 A JP53099851 A JP 53099851A JP 9985178 A JP9985178 A JP 9985178A JP S6138680 B2 JPS6138680 B2 JP S6138680B2
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- magnets
- magnetic pole
- conductor
- damping material
- 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.)
- Expired
Links
- 239000000463 material Substances 0.000 claims description 18
- 238000013016 damping Methods 0.000 claims description 12
- 239000004020 conductor Substances 0.000 claims description 11
- 230000005236 sound signal Effects 0.000 claims 1
- 230000002159 abnormal effect Effects 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- 239000005041 Mylar™ Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 239000002649 leather substitute Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007740 vapor deposition Methods 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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/04—Construction, mounting, or centering of coil
- H04R9/046—Construction
- H04R9/047—Construction in which the windings of the moving coil lay in the same plane
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Description
【発明の詳細な説明】
本発明は所謂ボン型と称される電気音響変換装
置に関し、特にそのダイヤフラムの異常音の発生
を抑制しかつ高調波歪率を低下させるべくなした
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electroacoustic transducer called a so-called Bonn type, and is particularly designed to suppress the generation of abnormal noise in its diaphragm and reduce harmonic distortion.
まず本発明の説明に先立ち、本出願人の先願
（特願昭53−60842号）に係わるこの種の装置につ
いて略述する。第１図はその一例を示す要部の縦
断面図である。図において１及び２は同方向の極
性として左右対称に配された第１、第２の磁石、
３及び４は双方の磁石の例えばＮ極面に設けられ
た第１、第２の磁極プレート、５はＳ極面に亘つ
て接合されたヨーク、６はこのヨークと一体で所
定の高さを有するセンタポールを示し、図示より
明らかな如く第１及び第２の磁石１，２はセンタ
ーポール６の両側において或る距離を保ち、Ｎ極
面側の第１及び第２の磁極プレート３，４は各磁
石より互に内方へ張り出されて一定の間隔を隔て
る配置関係となつている。つまり、第１、第２の
磁極プレート３及び４とセンターポール６との間
には夫々磁場が形成される。 First, prior to explaining the present invention, this type of apparatus related to the applicant's earlier application (Japanese Patent Application No. 1983-60842) will be briefly described. FIG. 1 is a vertical cross-sectional view of the main part showing one example. In the figure, 1 and 2 are first and second magnets arranged symmetrically with polarity in the same direction,
3 and 4 are first and second magnetic pole plates provided on, for example, the N-pole surface of both magnets, 5 is a yoke joined across the S-pole surface, and 6 is integral with this yoke and has a predetermined height. As is clear from the illustration, the first and second magnets 1 and 2 maintain a certain distance on both sides of the center pole 6, and the first and second magnetic pole plates 3 and 4 on the N-pole side are arranged so that they extend inward from each magnet and are spaced apart from each other by a constant distance. That is, magnetic fields are formed between the first and second magnetic pole plates 3 and 4 and the center pole 6, respectively.
そして本例の場合は、第１の磁極プレート３及
び第２の磁極プレート４の張出し部分の内面側即
ち左右の磁石のコーナ位置に対応する部分が対称
的なＬ字状の切欠７となされており、これらの切
欠内に振動体８（これは以下に述べるダイヤフラ
ム、導体び固定板を含む総称）が配設されて、振
動体８の位置が規制されている。この振動体８は
第２図に示すように、例えば樹脂材よりなる長方
形の固定板９に同じく長方形の抜き孔１０を加工
して、その一面にマイラーフイルム、ポリアミド
フイルムの如き樹脂薄膜よりなるダイヤフラム１
１（振動膜）を架張すると共に、このダイヤフラ
ム１１の面にアルミ薄層の如き金属層を例えば蒸
着により被着し、これにフオトエツチングを施し
て略長円渦旋状のパターンである導体１２（１２
ａ，１２ｂはその正逆経路）を形成したものとな
つている。１３ａ，１３ｂは導体両端にリード線
を接続するための端子である。 In the case of this example, the inner surfaces of the protruding parts of the first magnetic pole plate 3 and the second magnetic pole plate 4, that is, the parts corresponding to the corner positions of the left and right magnets, are made into symmetrical L-shaped notches 7. A vibrating body 8 (this is a general term including a diaphragm, a conductor, and a fixing plate described below) is disposed within these notches, and the position of the vibrating body 8 is regulated. As shown in FIG. 2, this vibrating body 8 has a rectangular fixing plate 9 made of a resin material, for example, with a rectangular punch hole 10 formed therein, and a diaphragm made of a thin resin film such as Mylar film or polyamide film on one side. 1
1 (vibration membrane), a metal layer such as a thin aluminum layer is deposited on the surface of the diaphragm 11, for example, by vapor deposition, and then photo-etched to form a conductor in a substantially elliptical spiral pattern. 12 (12
a and 12b form the forward and reverse paths). 13a and 13b are terminals for connecting lead wires to both ends of the conductor.
斯る振動体８を第１図に示しかつ説明した如
く、第１及び第２の磁極プレート３，４とセンタ
ーポール６との間に配設し、上述の各磁場内にダ
イヤフラム１１の長円渦旋状導体１２の両側経路
１２ａ，１２ｂを夫々位置させる構成を採り、導
体１２に音声電気信号を印加すれば周知の原理に
よりダイヤフラム１１が駆動されて電気信号が音
響（空気振動）に変換される。又、音響によつて
ダイヤフラム１１を振動させることで、導体１２
端子１３ａ，１３ｂから電気信号が取り出され
る。なお、本例は一応スピーカの場合であると理
解する方がよく、斯る装置自体については上記先
願の記載中に詳述されている。 As shown in FIG. 1 and described above, such a vibrating body 8 is arranged between the first and second magnetic pole plates 3, 4 and the center pole 6, and the ellipse of the diaphragm 11 is placed in each of the above-mentioned magnetic fields. A configuration is adopted in which both paths 12a and 12b of the spiral conductor 12 are positioned respectively, and when an audio electrical signal is applied to the conductor 12, the diaphragm 11 is driven according to a well-known principle, and the electrical signal is converted into sound (air vibration). Ru. Also, by vibrating the diaphragm 11 with sound, the conductor 12
Electric signals are taken out from terminals 13a and 13b. Incidentally, it is best to understand that this example is a case of a speaker, and such a device itself is described in detail in the above-mentioned prior application.
ところで、以上の如き電気音響変換装置（以下
便宜上スピーカとして説明する）においては、ダ
イヤフラム１１の固有の振動モードをおさえて異
常音の発生を抑えかつ高調波歪率を低下させる必
要がある。そこで従来の場合はセンターポール６
の両側の空間部１４内に制動材を設けるか乃至は
導体１２の側に制動材を配して、この制動材をダ
イヤフラム１１の略全面に対接させているが、斯
る手段の問題は電気入力が大きい場合導体１２の
発熱も当然大となるため、制動材の材質を例えば
グラスウールの如き耐熱性を有して空気透過性に
優れたものとせねばならない点であり、このよう
な材質の制動材は必ずしも好ましくはないが、制
動材を全く設けないときはダイヤフラム固有の振
動による異常音の発生等を回避し得ない。 Incidentally, in the above-described electroacoustic transducer (hereinafter described as a speaker for convenience), it is necessary to suppress the unique vibration mode of the diaphragm 11 to suppress the generation of abnormal sound and reduce the harmonic distortion rate. Therefore, in the conventional case, center pole 6
A damping material is provided in the space 14 on both sides of the diaphragm 11, or a damping material is placed on the conductor 12 side, and the damping material is brought into contact with substantially the entire surface of the diaphragm 11, but the problem with such a method is that If the electrical input is large, the heat generated by the conductor 12 will naturally be large, so the material of the brake material must be heat resistant and have excellent air permeability, such as glass wool. Although a damping material is not necessarily preferable, if no damping material is provided at all, it is impossible to avoid the generation of abnormal noise due to the vibration inherent to the diaphragm.
本発明の目的は、この種の電気音響変換装置に
おいて叙上のような問題点を改善し得る新規な制
動手段を提案せんとするにある。 An object of the present invention is to propose a novel braking means that can improve the above-mentioned problems in this type of electroacoustic transducer.
以下図面につき本発明の具体例を説明しよう。 Hereinafter, specific examples of the present invention will be explained with reference to the drawings.
第３図は本発明の一実施例を示す要部の拡大縦
断面図で、第１図及び第２図との対応部分には同
一符号を付して重複説明を省略するも、本例にお
いては先にべた第１及び第２の磁極プレート３４
の互に対向する張出し部の内面側に形成された切
欠７の丈寸法ｈを所要に設定し、各切欠７の奥端
部に対し或る巾のスペーサ１５を夫々介装して振
動体８の固定板９を押える如くなすと共に、両側
のスペーサ１５と隣接する内方、具体的には固定
板９の内側上面よりダイヤフラム１１の周縁部に
亘る位置に、予め所定の巾寸法となされた制動材
１６を挿入配設し、この制動材１６によつてダイ
ヤフラム１１を制動して、その固有の振動モード
を抑えることで異常音の発生等を抑制すべくなさ
れている。即ちこれを換言すればダイヤフラム１
１の周縁部のみを制動することにより従前の前面
制動手段に認められた問題点を解消するものであ
る。 FIG. 3 is an enlarged vertical cross-sectional view of essential parts showing one embodiment of the present invention. Parts corresponding to those in FIGS. are the first and second magnetic pole plates 34 that were previously solidified.
The length h of the notches 7 formed on the inner surfaces of the overhanging portions facing each other is set as required, and a spacer 15 of a certain width is interposed at the inner end of each notch 7, so that the vibrating body 8 A braking member having a predetermined width is placed on the inner side adjacent to the spacers 15 on both sides, specifically, from the inner upper surface of the fixing plate 9 to the periphery of the diaphragm 11. A material 16 is inserted and arranged, and the diaphragm 11 is braked by the damping material 16 to suppress its unique vibration mode, thereby suppressing the generation of abnormal noise. In other words, diaphragm 1
By braking only the periphery of the front brake, the problems encountered with the conventional front brake means are solved.
そこで制動材１６の材質は柔軟性をもつ例えば
不織布、クロス布あるいは合成皮革などが適して
おり、ダイヤフラム１１との接触面に起毛を有す
る場合には一層ソフトでかつ一様な対接状態とな
る。 Therefore, the damping material 16 is suitably made of a flexible material such as nonwoven fabric, cloth cloth, or synthetic leather, and if the contact surface with the diaphragm 11 has a raised surface, the contact state will be softer and more uniform. .
また、第４図は他の実施例を示す要部の拡大縦
断面図であり、装置の各基本要素は第３図に準じ
ている。本例においては第１及び第２の磁極プレ
ート３，４の切欠７を符号７ａ及び７ｂで示す如
く奥端側から夫々２段に形成し、双方の浅い段部
７ａにより振動体８の固定板９を挾持すると共
に、出口側の各段部７ｂには前例と同様な制動材
１６を配設した構成となされており、ダイヤフラ
ム１１の周縁部部に対する制動作用も何等異るこ
とはない。なお、本発明の実施態様はその要旨の
範囲内で種々に改変し得る。 Moreover, FIG. 4 is an enlarged vertical cross-sectional view of the main part showing another embodiment, and each basic element of the device is similar to FIG. 3. In this example, the notches 7 of the first and second magnetic pole plates 3 and 4 are formed in two steps from the rear end side, as shown by symbols 7a and 7b, and the shallow step portions 7a of both are formed in the fixing plate of the vibrating body 8. 9, and a braking material 16 similar to that of the previous example is provided at each step 7b on the exit side, and the braking action on the peripheral edge portion of the diaphragm 11 is also the same. Note that the embodiments of the present invention may be variously modified within the scope of the gist thereof.
第５図は本発明を適用した電気音響変換装置
（この場合はスピーカ）の音圧周波数特性及び第
２高調波歪特性を示す曲線図で、実線曲線Ａは音
圧周波数特性、同じく実線曲線A′は第２高調波
歪特性破線曲線Ｂは制動材を有しない場合の第２
高調波歪特性を夫々示し、破線曲線Ｂは実線曲線
A′に比し中高音領域において高くなつている。
故にこれよりして制動材を有しない従来装置は高
調波歪率も高いことは明らかである。 FIG. 5 is a curve diagram showing the sound pressure frequency characteristics and second harmonic distortion characteristics of an electroacoustic transducer (in this case, a speaker) to which the present invention is applied, where the solid line curve A is the sound pressure frequency characteristic, and the solid line curve A is also the same as the solid line curve A. ' is the second harmonic distortion characteristic broken line curve B is the second harmonic distortion characteristic when there is no damping material.
The harmonic distortion characteristics are shown respectively, and the broken line curve B is the solid line curve.
Compared to A', it is higher in the mid-high range.
Therefore, it is clear from this that the conventional device without a damping material also has a high harmonic distortion rate.
以上により本発明のもたらす独特な効果は既に
明らかあるが、要するに本発明はこの種の電気音
響変換装置において、そのダイヤフラムの周縁部
に柔軟性の制動材を対接して配設するのみで有効
な制動機能を奏し得るものであり、簡単な構成で
あるにも拘わらずその実益は頗る大である。 From the above, the unique effects brought about by the present invention are already clear, but in short, the present invention is effective in this type of electroacoustic transducer by simply arranging a flexible damping material in contact with the peripheral edge of the diaphragm. It can perform a braking function, and despite its simple structure, its practical benefits are enormous.
第１図は電気音響変換装置の一例を示す要部の
縦断面図、第２図はその振動体を示す斜視図、第
３図及び第４図はいずれも本発明の実施例を示す
要部の拡大縦断面図、第５図は特性曲線図であ
る。
図中、１及び２は磁石、３及び４は磁極プレー
ト、５はヨーク、６はセンターポール、７は切
欠、８は振動体、９は固定板、１０は抜き孔、１
１はダイヤフラム、１２は導体、１５はスペー
サ、１６は制動材を示す。
FIG. 1 is a vertical cross-sectional view of a main part showing an example of an electroacoustic transducer, FIG. 2 is a perspective view showing a vibrating body thereof, and FIGS. 3 and 4 are main parts showing an embodiment of the present invention. FIG. 5 is an enlarged longitudinal cross-sectional view of , and FIG. 5 is a characteristic curve diagram. In the figure, 1 and 2 are magnets, 3 and 4 are magnetic pole plates, 5 is a yoke, 6 is a center pole, 7 is a notch, 8 is a vibrating body, 9 is a fixed plate, 10 is a punch hole, 1
1 is a diaphragm, 12 is a conductor, 15 is a spacer, and 16 is a damping material.
Claims (1)
当接されると共に、各他端が互に対向するように
張り出して、それぞれ一方の極性の第１及び第２
の磁極を構成する第１及び第２の磁極部材と、 上記第１及び第２の磁石の間に間隔をおいて配
設された他方の極性の第３の磁極と、 該第３の磁極と上記第１及び第２の磁極とによ
る磁場内に配設され、その面上に音声信号電流経
路となる導体が被着され、両端部が上記第１及び
第２の磁石と上記第１及び第２の磁気部材との各
対向部分に設けられた空隙部に挿入されるダイヤ
フラムとを備え、 該ダイヤフラムと上記第１及び第２の磁極部材
の各張り出し部との間に形成された空隙部に柔軟
性を有する制動材を配設したことを特徴とする電
気音響変換装置。[Claims] 1. Each one end partially faces and abuts against the first and second magnets, and each other end extends so as to face each other, so that the first and second magnets of one polarity, respectively. Second
a third magnetic pole of the other polarity disposed at a distance between the first and second magnets; and the third magnetic pole. The conductor is disposed in a magnetic field formed by the first and second magnetic poles, and a conductor serving as an audio signal current path is adhered to the surface thereof, and both ends thereof are connected to the first and second magnets. a diaphragm inserted into a gap formed in each opposing portion of the first and second magnetic pole members; An electroacoustic transducer characterized in that a flexible damping material is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9985178A JPS5526772A (en) | 1978-08-16 | 1978-08-16 | Electroacoustic converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9985178A JPS5526772A (en) | 1978-08-16 | 1978-08-16 | Electroacoustic converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5526772A JPS5526772A (en) | 1980-02-26 |
| JPS6138680B2 true JPS6138680B2 (en) | 1986-08-30 |
Family
ID=14258296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9985178A Granted JPS5526772A (en) | 1978-08-16 | 1978-08-16 | Electroacoustic converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5526772A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57148990U (en) * | 1981-03-13 | 1982-09-18 | ||
| NL8102572A (en) * | 1981-05-26 | 1982-12-16 | Philips Nv | BAND TYPE ELECTROACOUSTIC CONVERTER WITH LOW DISTORTION AND IMPROVED SENSITIVITY. |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5134427U (en) * | 1974-09-06 | 1976-03-13 |
-
1978
- 1978-08-16 JP JP9985178A patent/JPS5526772A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5526772A (en) | 1980-02-26 |
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