JP2693447B2 - Method of manufacturing diaphragm for speaker - Google Patents
Method of manufacturing diaphragm for speakerInfo
- Publication number
- JP2693447B2 JP2693447B2 JP62193533A JP19353387A JP2693447B2 JP 2693447 B2 JP2693447 B2 JP 2693447B2 JP 62193533 A JP62193533 A JP 62193533A JP 19353387 A JP19353387 A JP 19353387A JP 2693447 B2 JP2693447 B2 JP 2693447B2
- Authority
- JP
- Japan
- Prior art keywords
- cone
- outer peripheral
- diaphragm
- neck portion
- fibers
- 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 - Fee Related
Links
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は例えば低周波用のスピーカに使用して好適な
スピーカ用振動板に関する。
〔発明の概要〕
本発明は例えば低周波用のスピーカに使用して好適な
スピーカ用振動板に関し、一方向の高弾性あるいは高強
度繊維と熱硬化あるいは熱可塑性樹脂とにより所定形状
に形成されたスピーカ用振動板の製造方法に於いて、こ
の繊維と上記樹脂とから成る複数の矩形状板片を、繊維
方向が振動板の放射方向と同一になり且つ振動板のコー
ン外周部におけるよりもコーンネック部におけるほうが
相互の重なり幅が大きくなるように配置することによ
り、振動板の放射方向のこの繊維の略全部がコーンネッ
ク部からコーン外周部まで連なっていると共に、コーン
ネック部ではコーン外周部よりも板厚が厚く且つこの繊
維の密度が大きくなるようにし、その結果、、ボイスコ
イルの振動がコーンネツク部より外周部へ確実に伝わり
良好な再生音が得られるスピーカを得ることが出来ると
共に、コーンネツク部の強度が強く補強が不要となる利
益がある。
〔従来の技術〕
先に一方向Ａの高弾性あるいは高強度繊維例えば炭素
繊維と熱硬化あるいは熱可塑性樹脂、例えばエポキシ樹
脂とにより第７図に示す如きコーン状のスピーカ用振動
板が提案されている（実開昭58−191792号）。これは第
８図に示す如く例えばエポキシ樹脂がＢステージ（半硬
化）の状態で含浸されている一方向Ａに配列された炭素
繊維のシート（プリプレグシート）（１）を第７図に示
す如きコーン状振動板の展開図に合わせて、その繊維の
方向Ａが振動板の放射方向と同一方向になるように切断
して台形の複数の同一形状をなすプリプレグ片（1a），
（1b）を得、これら切断された台形のプリプレグ片（1
a），（1b）を第６図に示す如く雄型金型（２）の截頭
円錐部（３）周面に積層配置（この場合６枚のプリプレ
グ片（1a）……が截頭円錐部（３）の周面に相互の間隔
がない状態で配置され、これらのプリプレグ片（1a）…
…の上に次の６枚のプリプレグ片（1b）……が略30度周
方向にずらされて接合配置される。）され、そしてこの
プリプレグ片（1b）……の表面にエポキシ樹脂がＢステ
ージ（半硬化）の状態で含浸されている一方向に配列さ
れた炭素繊維の帯状プリプレグシートが渦巻状に配置さ
れ、この状態で雌型金型（４）を雄型金型（２）に重ね
合わせ、150℃で加熱しながら加圧成形し、この加熱加
圧によつて各プリプレグ片（1a），（1b）及び帯状プリ
プレグシートのエポキシ樹脂が熱硬化してこれらを一体
に結合してコーン状振動板としたものである。斯る炭素
繊維とエポキシ樹脂とより成る振動板は剛性及び結合強
度が共に大で良好な振動特性を得ることができる。
〔発明が解決しようとする問題点〕
然しながら斯る従来の一方向の炭素繊維を使用したス
ピーカ用振動板は第７図，第８図に示す如く台形のプリ
プレグ片（1a），（1b）を使用しているので、この台形
の両傾斜部でコーンネツク部から外周部にかけてこの繊
維が切れた部分があり、ボイスコイルの振動が良好に、
このコーンネツク部より外周部に伝達されない不都合が
あつた。またこの従来のスピーカ用振動板はコーンネツ
ク部から外周部まで板厚が均一であり、ネツク部の補強
を必要としていた。
本発明は斯る点に鑑み、ボイスコイルの振動がコーン
ネツク部より外周部へ確実に伝わると共にコーンネツク
部の補強を不要とするスピーカ用振動板を提供すること
を目的とする。
〔問題点を解決するための手段〕
本発明に係るスピーカ用振動板の製造方法は、例えば
第１図及び第２図に示す如く一方向Ａの高弾性あるいは
高強度繊維（５）と熱硬化あるいは熱可塑性樹脂（６）
とにより所定形状に形成されたスピーカ用振動板の製造
方法に於いて、例えば第４図及び第５図に示す如く、繊
維（５）と樹脂（６）とから成る複数の矩形状板片（1
c）を、繊維（５）の方向が振動板（７）の放射方向と
同一になり且つ振動板（７）のコーン外周部（7b）にお
けるよりもコーンネック部（7a）におけるほうが相互の
重なり幅が大きくなるように配置することにより、振動
板（７）の放射方向Ｂの繊維（５）の略全部がコーンネ
ック部（7a）からコーン外周部（7b）まで連なっている
と共に、コーンネック部（7a）ではコーン外周部（7b）
よりも板厚が厚く且つ繊維（５）の密度が大きくなるよ
うにしたことを特徴としている。
〔作用〕
斯る本発明に依れば、複数の矩形状板片（1c）が繊維
（５）の方向を振動板（７）の放射方向と同一にし且コ
ーン外周部（7b）よりもコーンネック部（7a）において
相互の重なり幅を大きくした状態で配置されることによ
り、振動板（７）の放射方向の繊維（５）の略全部がコ
ーンネツク部（7a）からコーン外周部（7b）まで連なつ
ているのでコーンネツク部（7a）のボイスコイルの振動
がこの外周部（7b）に良好に伝達され、良好な振動特性
を得ることができると共に、外周部（7b）とコーンネツ
ク部（7a）との繊維数が略同じなので、このネツク部
（7a）の板厚は厚くなり、繊維（５）の密度が大とな
り、このネツク部（7a）の強度が強くなり、このネツク
部（7a）の補強が不要となる。
〔実施例〕
以下図面を参照しながら本発明スピーカ用振動板の一
実施例を、その製造方法に従つて説明する。
本例に於いてはまず第５図に示すように熱硬化あるい
は熱可塑性樹脂例えばエポキシ樹脂（６）がＢステージ
（半硬化）の状態で含浸されている一方向Ａに配列され
た高弾性あるいは高強度繊維例えば炭素繊維（５）のシ
ート（プリプレグシート）（１）を第５図A,Bに示す如
くその繊維方向Ａが振動板（７）の放射方向と同一方向
なる様に所定幅Ｗ、所定長さＬの短冊状に切断し、複数
の同一形状をなすプリプレグ短冊片（1c）を得る。本例
に於いては例えば30cmウーハの振動板（７）を得るとき
はこのプリプレグ短冊片（1c）の幅Ｗを28.5mmとし、こ
の長さＬを160mmとする。
次いで、これら切断されたプリプレグ短冊片（1c）を
第６図に示す所定形状の雄型金型（２）の截頭円錐部
（３）周面に第４図に示す如く積層配置する。この場
合、本例に於いては第４図に示す如く１層を28枚のこの
プリプレグ短冊状（1c）を振動板（７）の外周部（7b）
で相互に間隔がない状態で、このコーンネツク部（7a）
では所定幅重なり合つた状態で配置し、これを４層互い
に周方向に所定角ずらして配置する。この状態で雌型金
型（４）を雄型金型（２）に重ね合わせ、150℃で加熱
しながら加圧成形する。この加熱加圧によつて各プリプ
レグ短冊片（1c）のエポキシ樹脂（６）は熱硬化してこ
れらを一体的に結合する。
この熱硬化後、両金型（２）及び（４）間から取り出
される成形品は第１図及び第２図に示す如き、一方向Ａ
の炭素繊維（５）とエポキシ樹脂（６）とにより所定形
状に形成されたスピーカ用振動板（７）に於いて、振動
板（７）の放射方向Ｂの炭素繊維（５）の略全部がコー
ンネツク部（7a）からコーン外周部（7b）まで連なつて
いると共に、コーンネツク部（7a）の板厚をこのコーン
外周部（7b）より厚くなつた炭素繊維とエポキシ樹脂と
より成る積層形コーン状振動板（７）である。
この場合本例に於いては、この振動板（７）の外周部
（7b）の板厚t2は例えば0.4〜0.6mmとなり、この板厚は
コーンネツク部（7a）の方向に行くに従つて徐々に厚く
なり、このネツク部（7a）ではその板厚t1は例えば1mm
となる。この場合振動板（７）の外周部（7b）のＩ−Ｉ
線断面図は第３図上側に示す如くなり、このネツク部
（7a）のII−II線断面図は第３図下側に示す如くで、こ
のネツク部（7a）は外周部（7b）に比較し板厚が厚くな
ると共に炭素繊維（５）の単位面積当りの数即ち密度が
大となつている。
本例は上述の如く構成されているので、振動板（７）
の放射方向Ｂの炭素繊維（５）の略全部がコーンネツク
部（7a）からコーン外周部（7b）まで連なつているので
コーンネツク部（7a）のボイスコイルの振動が外周部
（7b）に良好に伝達され、良好な振動特性を得ることが
できると共にコーン外周部（7b）とコーンネツク部（7
a）との炭素繊維が略同じなので、このネツク部（7a）
の板厚は厚くなり、炭素繊維（５）の密度が大となり、
このネツク部（7a）の強度が強くなり、このネツク部
（7a）の補強が不要となる利益がある。また本例に於い
ては炭素繊維とエポキシ樹脂とより振動板（７）を形成
しているので、従来と同様に剛性及び結合強度が共に大
で良好な振動特性を得ることができることは勿論であ
る。
尚、上述実施例に於いては振動板（７）の放射方向Ｂ
のプリプレグ短冊片（1c）のみにより振動板（７）を形
成する如く述べたが、音質等の必要に応じ第４図に示す
如くプリプレグ短冊片（1c）を配する外に一方向に配列
された炭素繊維の帯状プリプレグシートを渦巻状に積層
配置した後に加圧成形して振動板（７）を得る様にして
も良いことは勿論である。また上述例では炭素繊維
（５）を用いたが、この代りにガラス繊維、グラフアイ
ト繊維、ボロン繊維、シリコンカーバイト繊維、芳香族
ポリアミド樹脂等の高弾性あるいは高強度繊維を使用し
ても良いことは勿論である。また上述例ではエポキシ樹
脂を使用したが、この代りにその他の熱硬化あるいは熱
可塑性樹脂が使用できることは勿論である。また本発明
は上述実施例に限ることなく本発明の要旨を逸脱するこ
となく、その他種々の構成が取り得ることは勿論であ
る。
〔発明の効果〕
本発明に依ればボイスコイルの振動がコーンネツク部
（7a）より外周部（7b）に良好に伝わり、良好な再生音
が得られるスピーカを得ることが出来ると共にコーンネ
ツク部（7a）の強度が強くなり、このコーンネツク部
（7a）の補強が不要となる利益がある。The present invention relates to a speaker diaphragm suitable for use in, for example, a low frequency speaker. [Summary of the Invention] The present invention relates to a speaker diaphragm suitable for use in, for example, a low-frequency speaker, and is formed into a predetermined shape by unidirectional high-elasticity or high-strength fiber and thermosetting or thermoplastic resin. In a method of manufacturing a diaphragm for a speaker, a plurality of rectangular plate pieces made of the fiber and the resin are formed into a cone whose fiber direction is the same as the radial direction of the diaphragm and more than at the outer peripheral portion of the cone of the diaphragm. By arranging so that the overlapping width in the neck portion is larger than that in the neck portion, almost all of these fibers in the radial direction of the diaphragm are connected from the cone neck portion to the cone outer peripheral portion, and at the cone neck portion, the cone outer peripheral portion is formed. The thickness of the fiber is thicker and the density of this fiber is higher than that of the conventional one. There is an advantage that a speaker that can obtain a reproduced sound can be obtained, and that the strength of the cone net portion is strong and no reinforcement is required. [Prior Art] Previously, a cone-shaped speaker diaphragm as shown in FIG. 7 has been proposed by using high elasticity or high strength fibers in one direction A, such as carbon fibers, and thermosetting or thermoplastic resin such as epoxy resin. (Actual development number 58-191792). This is a carbon fiber sheet (prepreg sheet) (1) arranged in one direction A, which is impregnated with epoxy resin in a B stage (semi-cured) state as shown in FIG. 8, as shown in FIG. A plurality of trapezoidal prepreg pieces (1a) are cut so that the direction A of the fiber is in the same direction as the radial direction of the diaphragm according to the development view of the cone-shaped diaphragm.
(1b), these trapezoidal prepreg pieces (1
As shown in FIG. 6, a) and (1b) are stacked on the peripheral surface of the frustoconical portion (3) of the male die (2) (in this case, the six prepreg pieces (1a) ... are frustoconical). These prepreg pieces (1a) are arranged on the peripheral surface of the part (3) with no mutual spacing.
The following six prepreg pieces (1b) are placed on top of each other by being offset by approximately 30 degrees in the circumferential direction. ), And an epoxy resin is impregnated on the surface of the prepreg piece (1b) in a B-stage (semi-cured) state, and unidirectionally arranged carbon fiber belt-shaped prepreg sheets are spirally arranged. In this state, the female mold (4) is overlaid on the male mold (2), and pressure molding is performed while heating at 150 ° C., and the prepreg pieces (1a), (1b) are heated and pressed by this pressure molding. The epoxy resin of the belt-shaped prepreg sheet is heat-cured and integrally bonded to form a cone-shaped diaphragm. The vibrating plate made of such carbon fiber and epoxy resin has high rigidity and bonding strength, and can obtain good vibration characteristics. [Problems to be Solved by the Invention] However, such a conventional speaker diaphragm using unidirectional carbon fibers has trapezoidal prepreg pieces (1a) and (1b) as shown in FIG. 7 and FIG. Since it is used, there is a part where this fiber is cut from the cone neck part to the outer peripheral part in both inclined parts of this trapezoid, and the vibration of the voice coil is good,
There is an inconvenience that it is not transmitted from the cone neck portion to the outer peripheral portion. Further, this conventional speaker diaphragm has a uniform plate thickness from the cone neck portion to the outer peripheral portion, and thus requires reinforcement of the neck portion. The present invention has been made in view of the above problems, and an object of the present invention is to provide a speaker diaphragm in which vibration of a voice coil is reliably transmitted from a cone neck portion to an outer peripheral portion and reinforcement of the cone neck portion is unnecessary. [Means for Solving Problems] A method for manufacturing a speaker diaphragm according to the present invention is, for example, as shown in FIGS. 1 and 2, a high elasticity or high strength fiber (5) in one direction A and a thermosetting. Or thermoplastic resin (6)
In a method of manufacturing a speaker diaphragm formed in a predetermined shape by using, for example, as shown in FIGS. 4 and 5, a plurality of rectangular plate pieces (made of fiber (5) and resin (6) ( 1
c) the direction of the fiber (5) is the same as the radial direction of the diaphragm (7) and the cone neck portion (7a) of the diaphragm (7) overlaps each other more than that of the cone outer peripheral portion (7b). By arranging so that the width becomes large, almost all the fibers (5) in the radial direction B of the diaphragm (7) are connected from the cone neck portion (7a) to the cone outer peripheral portion (7b), and at the same time, the cone neck is formed. Part (7a) is the outer cone (7b)
It is characterized in that the plate thickness is thicker and the density of the fibers (5) is larger than that. [Operation] According to the present invention, the plurality of rectangular plate pieces (1c) make the direction of the fiber (5) the same as the radial direction of the vibrating plate (7), and the cone outer peripheral portion (7b) rather than the cone outer peripheral portion (7b). By arranging the neck portion (7a) in a state where the mutual overlapping width is increased, substantially all of the radial fibers (5) of the diaphragm (7) are transferred from the cone neck portion (7a) to the cone outer peripheral portion (7b). The vibration of the voice coil of the cone neck portion (7a) is satisfactorily transmitted to the outer peripheral portion (7b), and good vibration characteristics can be obtained, and the outer peripheral portion (7b) and the cone neck portion (7a) are connected. Since the number of fibers is substantially the same as the number of the fibers (), the thickness of the neck portion (7a) is increased, the density of the fibers (5) is increased, and the strength of the neck portion (7a) is increased. ) Is unnecessary. [Embodiment] An embodiment of a speaker diaphragm of the present invention will be described below with reference to the manufacturing method thereof with reference to the drawings. In this example, first, as shown in FIG. 5, thermosetting or thermoplastic resin such as epoxy resin (6) is impregnated in the B stage (semi-cured) state in a high elasticity arranged in one direction A or As shown in FIGS. 5A and 5B, a sheet (prepreg sheet) (1) of high-strength fiber, for example, carbon fiber (5), has a predetermined width W such that the fiber direction A is in the same direction as the radial direction of the diaphragm (7). , A predetermined length L is cut into strips to obtain a plurality of prepreg strips (1c) having the same shape. In this example, when a diaphragm (7) of 30 cm woofer is obtained, the width W of the prepreg strip (1c) is set to 28.5 mm and the length L thereof is set to 160 mm. Next, these cut prepreg strips (1c) are laminated on the peripheral surface of the truncated cone portion (3) of the male die (2) having a predetermined shape shown in FIG. 6 as shown in FIG. In this case, in the present example, as shown in FIG. 4, the prepreg strip shape (1c) of 28 layers is used as the outer peripheral portion (7b) of the diaphragm (7).
In this condition, there is no space between them, and this cone-shaped part (7a)
Then, they are arranged in a state of being overlapped with each other by a predetermined width, and the four layers are arranged so as to be displaced by a predetermined angle in the circumferential direction. In this state, the female mold (4) is overlaid on the male mold (2), and pressure molding is performed while heating at 150 ° C. By this heating and pressurization, the epoxy resin (6) of each prepreg strip (1c) is thermally cured to integrally bond them. After this heat curing, the molded product taken out from between the two molds (2) and (4) is one direction A as shown in FIG. 1 and FIG.
In the speaker diaphragm (7) formed in a predetermined shape from the carbon fiber (5) and the epoxy resin (6), substantially all of the carbon fiber (5) in the radial direction B of the diaphragm (7) is A laminated cone made of carbon fiber and epoxy resin that is connected from the cone neck portion (7a) to the cone outer peripheral portion (7b) and has a plate thickness of the cone neck portion (7a) thicker than the cone outer peripheral portion (7b). The vibrating plate (7). In this case, in the present example, the plate thickness t 2 of the outer peripheral portion (7b) of the vibrating plate (7) is, for example, 0.4 to 0.6 mm, and this plate thickness increases in the direction of the cone neck portion (7a). It gradually becomes thicker, and the plate thickness t 1 at this neck portion (7a) is, for example, 1 mm.
Becomes In this case, I-I of the outer peripheral portion (7b) of the diaphragm (7)
The line sectional view is as shown on the upper side of FIG. 3, and the II-II line sectional view of the neck portion (7a) is as shown on the lower side of FIG. 3, and the neck portion (7a) is on the outer peripheral portion (7b). In comparison, as the plate thickness increases, the number of carbon fibers (5) per unit area, that is, the density increases. Since this example is configured as described above, the vibrating plate (7)
Since almost all of the carbon fibers (5) in the radial direction B are connected from the cone neck portion (7a) to the cone outer peripheral portion (7b), the vibration of the voice coil in the cone neck portion (7a) is good in the outer peripheral portion (7b). Is transmitted to the cone outer peripheral portion (7b) and the cone neck portion (7).
Since the carbon fiber is almost the same as that of a), this net part (7a)
The plate thickness of, the density of carbon fiber (5) becomes large,
There is an advantage that the strength of the neck portion (7a) becomes stronger and the reinforcement of the neck portion (7a) becomes unnecessary. Further, in this example, since the vibrating plate (7) is formed from carbon fiber and epoxy resin, it is of course possible to obtain good vibration characteristics with high rigidity and high bonding strength as in the conventional case. is there. Incidentally, in the above-mentioned embodiment, the radiation direction B of the diaphragm (7) is
Although it was described that the diaphragm (7) is formed only by the prepreg strips (1c), it is arranged in one direction outside the prepreg strips (1c) as shown in FIG. Needless to say, the vibrating plate (7) may be obtained by stacking the carbon fiber belt-shaped prepreg sheets in a spiral shape and then press-molding them. Further, although carbon fiber (5) is used in the above example, high elastic or high strength fiber such as glass fiber, graphite fiber, boron fiber, silicon carbide fiber or aromatic polyamide resin may be used instead. Of course. Further, although the epoxy resin is used in the above example, it goes without saying that other thermosetting or thermoplastic resin can be used instead. Further, the present invention is not limited to the above-described embodiment, but may take various other configurations without departing from the gist of the present invention. [Advantages of the Invention] According to the present invention, the vibration of the voice coil is satisfactorily transmitted from the cone neck portion (7a) to the outer peripheral portion (7b), and a speaker capable of obtaining a good reproduced sound can be obtained and the cone neck portion (7a) can be obtained. ) Becomes stronger, and there is an advantage that the reinforcement of the cone net portion (7a) is unnecessary.
【図面の簡単な説明】
第１図は本発明スピーカ用振動板の一実施例を示す斜視
図、第２図は第１図の切欠断面図、第３図は第２図の要
部の断面図、第４図，第５図及び第６図は夫々本発明の
説明に供する線図、第７図は従来のスピーカ用振動板の
例を示す斜視図、第８図は第７図の説明に供する線図で
ある。
（１）は一方向の炭素繊維のプリプレグシート、（1c）
はプリプレグ短冊片、（５）は炭素繊維、（６）はエポ
キシ樹脂、（７）は振動板、（7a）はコーンネツク部、
（7b）はコーン外周部である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a speaker diaphragm of the present invention, FIG. 2 is a cutaway sectional view of FIG. 1, and FIG. 3 is a sectional view of an essential part of FIG. FIG. 4, FIG. 5, FIG. 5 and FIG. 6 are diagrams for explaining the present invention respectively, FIG. 7 is a perspective view showing an example of a conventional speaker diaphragm, and FIG. 8 is an explanation of FIG. FIG. (1) is a unidirectional carbon fiber prepreg sheet, (1c)
Is a prepreg strip, (5) is carbon fiber, (6) is epoxy resin, (7) is a diaphragm, (7a) is a cone neck part,
(7b) is the outer periphery of the cone.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭55−115795（ＪＰ，Ａ) 特開 昭54−71620（ＪＰ，Ａ) 特開 昭54−39626（ＪＰ，Ａ) 特開 昭58−95494（ＪＰ，Ａ) 特開 昭53−124414（ＪＰ，Ａ) 実開 昭58−191792（ＪＰ，Ｕ) 実開 昭53−45027（ＪＰ，Ｕ) 実開 昭63−125499（ＪＰ，Ｕ) 実公 昭28−3207（ＪＰ，Ｙ１) ────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-55-115795 (JP, A) JP-A-54-71620 (JP, A) JP 54-39626 (JP, A) JP-A-58-95494 (JP, A) JP-A-53-124414 (JP, A) 58-191792 (JP, U) Actual development Sho 53-45027 (JP, U) 63-125499 (JP, U) Jitsuko Sho 28-3207 (JP, Y1)
Claims (1)
は熱可塑性樹脂とにより所定形状に形成されたスピーカ
用振動板の製造方法に於いて、上記繊維と上記樹脂とか
ら成る複数の矩形状板片を、上記繊維の方向が振動板の
放射方向と同一になり且つ上記振動板のコーン外周部に
おけるよりもコーンネック部におけるほうが相互の重な
り幅が大きくなるように配置することにより、上記振動
板の放射方向の上記繊維の略全部が上記コーンネック部
から上記コーン外周部まで連なっていると共に、上記コ
ーンネック部では上記コーン外周部よりも板厚が厚く且
つ上記繊維の密度が大きくなるようにしたことを特徴と
するスピーカ用振動板の製造方法。(57) [Claims] In a method of manufacturing a speaker diaphragm formed in a predetermined shape from unidirectional high-elasticity or high-strength fibers and thermosetting or thermoplastic resin, a plurality of rectangular plate pieces made of the fibers and the resin are used. , The radiation of the vibrating plate is arranged such that the direction of the fibers is the same as the radial direction of the vibrating plate and the overlapping width is larger in the cone neck part than in the cone outer peripheral part of the vibrating plate. Almost all of the fibers in the direction are connected from the cone neck portion to the cone outer peripheral portion, and in the cone neck portion, the plate thickness is thicker than the cone outer peripheral portion and the density of the fibers is increased. And a method for manufacturing a speaker diaphragm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62193533A JP2693447B2 (en) | 1987-08-01 | 1987-08-01 | Method of manufacturing diaphragm for speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62193533A JP2693447B2 (en) | 1987-08-01 | 1987-08-01 | Method of manufacturing diaphragm for speaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6437199A JPS6437199A (en) | 1989-02-07 |
| JP2693447B2 true JP2693447B2 (en) | 1997-12-24 |
Family
ID=16309658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62193533A Expired - Fee Related JP2693447B2 (en) | 1987-08-01 | 1987-08-01 | Method of manufacturing diaphragm for speaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2693447B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1656325A (en) * | 2002-05-29 | 2005-08-17 | 进取悬浮公司 | Hydraulic dampers with pressure regulated control valve |
| US7483545B2 (en) | 2004-07-07 | 2009-01-27 | Tadashi Nagaoka | Acoustic diaphragm |
| JP6275793B1 (en) * | 2016-09-16 | 2018-02-07 | アルパイン株式会社 | Speaker |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5471620A (en) * | 1977-11-17 | 1979-06-08 | Matsushita Electric Ind Co Ltd | Diaphragm |
| JPS5548628U (en) * | 1978-09-25 | 1980-03-29 | ||
| JPS55115795A (en) * | 1979-02-27 | 1980-09-05 | Toray Ind Inc | Speaker |
| JPS5822000A (en) * | 1981-08-01 | 1983-02-09 | Sharp Corp | Piezoelectric speaker |
-
1987
- 1987-08-01 JP JP62193533A patent/JP2693447B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6437199A (en) | 1989-02-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6246353B2 (en) | ||
| US4562899A (en) | Diaphragm of electroacoustic transducer and method of manufacturing the same | |
| JP2693447B2 (en) | Method of manufacturing diaphragm for speaker | |
| JPS5849185B2 (en) | Manufacturing method for automotive floor mats | |
| JP2007036990A (en) | Manufacturing method of diaphragm for speaker apparatus | |
| JPS6130479B2 (en) | ||
| TWI720557B (en) | How to make a safety helmet | |
| JP2974581B2 (en) | Manufacturing method of molded ceiling base material for automobile | |
| JP2548998B2 (en) | Speaker diaphragm and method of manufacturing the same | |
| JPS5981997A (en) | Manufacture of diaphragm of dynamic electroacoustic transducer | |
| JPS623987Y2 (en) | ||
| JPS6129532A (en) | Interior finish material | |
| JPS6342795Y2 (en) | ||
| JPS59135000A (en) | Composite diaphragm for speaker | |
| JP3739583B2 (en) | Manufacturing method for flooring | |
| JPS5843699A (en) | Diaphragm for loudspeaker and its manufacture | |
| JPS58215196A (en) | Production method of diaphragm for speaker | |
| JPS6325759B2 (en) | ||
| JPS59205899A (en) | Diaphragm for speaker | |
| JPS58130697A (en) | Acoustic diaphragm and its production | |
| JPH0378840B2 (en) | ||
| JPS6210078B2 (en) | ||
| JPS58114698A (en) | Diaphragm for flat plate speaker | |
| JPS5849239A (en) | Diaphragm with sandwich structure and its manufacture | |
| JPH0324120B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |