JP2001245385A - Diaphragm for speaker - Google Patents
Diaphragm for speakerInfo
- Publication number
- JP2001245385A JP2001245385A JP2000054996A JP2000054996A JP2001245385A JP 2001245385 A JP2001245385 A JP 2001245385A JP 2000054996 A JP2000054996 A JP 2000054996A JP 2000054996 A JP2000054996 A JP 2000054996A JP 2001245385 A JP2001245385 A JP 2001245385A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- thickness
- vibrating
- diaphragm
- filled
- 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.)
- Granted
Links
Landscapes
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、スピーカ用振動板
に関するものである。The present invention relates to a diaphragm for a speaker.
【０００２】[0002]
【従来の技術】スピーカ振動板の材料として、従来より
内部損失が高く、成形性、耐水性、耐湿性に優れている
特性を有するポリプロピレン等の樹脂材料が使用され、
射出成形機により図２に示すような、ドーム形状中央部
にゲート７を有し、中央に一定肉厚の振動部６と外周部
に剛性を高める厚肉のエッジ部５から構成される振動板
に成形される。2. Description of the Related Art As a material for a speaker diaphragm, a resin material such as polypropylene, which has characteristics of higher internal loss and excellent moldability, water resistance and moisture resistance, has been used.
As shown in FIG. 2, a diaphragm having a gate 7 in the center of the dome shape, a vibration portion 6 having a constant thickness in the center, and a thick edge portion 5 for increasing rigidity in the outer periphery as shown in FIG. Molded into
【０００３】[0003]
【発明が解決しようとする課題】上記図２に示す従来の
スピーカ用振動板の構造では、射出成形時に射出成形金
型入れ子が僅かに偏り、金型キャビティが僅か偏肉する
と、ゲート７から充填された樹脂が圧力損失の低い偏肉
した振動部６の厚肉部分に偏って流れるため、偏肉した
振動部６の薄肉部分が充填される前にエッジ部５が充填
される。エッジ部５の充填時には樹脂温が低下し樹脂が
固化するため、薄肉部分が完全に充填されず、成形品に
ショート、ウェルドが発生する。本発明は、このショー
ト、ウェルドの発生の防止を目的とする。In the structure of the conventional diaphragm for a speaker shown in FIG. 2 described above, when the nest of the injection mold is slightly deviated during the injection molding and the cavity of the die is slightly deviated, the gate 7 is filled. Since the applied resin flows unevenly to the thick portion of the vibrating portion 6 having a low pressure loss, the edge portion 5 is filled before the thin portion of the vibrating portion 6 is filled. When the edge portion 5 is filled, the resin temperature is lowered and the resin is solidified, so that the thin portion is not completely filled, and shorts and welds occur in the molded product. An object of the present invention is to prevent the occurrence of shorts and welds.
【０００４】[0004]
【課題を解決するための手段】この課題を解決するため
に本発明は、ドーム形状中央部にゲートを有し、中央に
一定肉厚の振動部と外周部に厚肉のエッジ部を有するス
ピーカ用樹脂振動板において、振動部とエッジ部の連結
位置に振動部の肉厚より薄い薄肉部を設けたものであ
る。SUMMARY OF THE INVENTION In order to solve this problem, the present invention provides a speaker having a gate in the center of a dome shape, a vibrating portion having a constant thickness in the center, and a thick edge in the outer periphery. In the resin vibration plate for use, a thin portion thinner than the thickness of the vibrating portion is provided at a connecting position between the vibrating portion and the edge portion.
【０００５】これによりキャビティが僅かに偏肉した場
合であっても、ゲートから充填される樹脂は、偏肉した
振動部の厚肉の部分に偏って流れた後、振動部とエッジ
部の間に設けられた薄肉部に到達すると、この部分は圧
力損失が高いため、樹脂はエッジ部に流れず偏肉した振
動部の薄肉部分が充填され、薄肉部分の充填後、エッジ
部が充填される。振動部が充填される時は樹脂温は高温
で樹脂の流動性が高く固化していないので、振動部にシ
ョート、ウェルドのないスピーカ用振動板が得られる。As a result, even if the cavity is slightly uneven, the resin filled from the gate flows unevenly to the thick portion of the uneven vibrating portion and then flows between the vibrating portion and the edge portion. When reaching the thin portion provided in the above, since this portion has a high pressure loss, the resin does not flow to the edge portion and the thin portion of the uneven vibration portion is filled, and after filling the thin portion, the edge portion is filled. . When the vibrating portion is filled, the resin temperature is high and the fluidity of the resin is high and the resin is not solidified, so that a speaker diaphragm having no short circuit and no weld in the vibrating portion can be obtained.
【０００６】[0006]
【発明の実施の形態】本発明の請求項１に記載の発明
は、ドーム形状中央部にゲートを有し、中央に一定肉厚
の振動部と外周部に厚肉のエッジ部を有するスピーカ用
樹脂振動板において、振動部とエッジ部の連結位置に振
動部の肉厚より薄い薄肉部を設けたことを特徴とするも
のであり、成形時にキャビティが僅かに偏肉した場合で
あっても、ゲートから充填される樹脂は、偏肉した振動
部の厚肉の部分に偏って流れた後、振動部とエッジ部の
間に設けられた薄肉部に到達すると、この部分は圧力損
失が高いため、樹脂はエッジ部に流れず偏肉した振動部
の薄肉部分が充填され、薄肉部分の充填後、エッジ部が
充填されるため、振動部にショート、ウェルドのないス
ピーカ用振動板が得られる作用を有する。DETAILED DESCRIPTION OF THE INVENTION The invention according to claim 1 of the present invention is for a speaker having a gate in the center of a dome shape, a vibrating portion having a constant thickness in the center and a thick edge in the outer periphery. In the resin diaphragm, it is characterized by providing a thin portion thinner than the thickness of the vibrating portion at the connecting position of the vibrating portion and the edge portion, even if the cavity is slightly uneven during molding, After the resin filled from the gate flows unevenly to the thick part of the uneven vibrating part and reaches the thin part provided between the vibrating part and the edge part, since this part has high pressure loss, Since the resin does not flow to the edge portion, the thin portion of the vibrating portion, which is uneven in thickness, is filled, and after the thin portion is filled, the edge portion is filled. Having.
【０００７】請求項２に記載の発明は、薄肉部は振動部
肉厚の２０％〜８０％であることを特徴とするものであ
り、請求項１記載の発明と同じ作用を有する。According to a second aspect of the present invention, the thin portion has a thickness of 20% to 80% of the thickness of the vibrating portion, and has the same effect as the first aspect.
【０００８】以下、本発明の実施の形態について、図１
を用いて説明する。 （実施の形態）図１は本発明のスピーカ用振動板を示
し、図において、１は厚肉のエッジ部、２は一定肉厚の
振動部、３はドーム形状中央部に設けたゲート、４はエ
ッジ部１と振動部２の連結位置に設けた薄肉部である。Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. (Embodiment) FIG. 1 shows a speaker diaphragm according to the present invention. In FIG. 1, reference numeral 1 denotes a thick edge portion, reference numeral 2 denotes a vibrating portion having a constant thickness, reference numeral 3 denotes a gate provided at a central portion of a dome shape, Is a thin portion provided at a connection position between the edge portion 1 and the vibration portion 2.
【０００９】各部の厚さの一例を示すと、振動部２の肉
厚が０．０５ｍｍの場合、エッジ部１は０．４ｍｍ、薄
肉部４は０．０３ｍｍ、ゲートは０．３ｍｍであり、こ
の例の場合は薄肉部４の肉厚は振動部２の肉厚の３／５
である。As an example of the thickness of each part, when the thickness of the vibrating part 2 is 0.05 mm, the edge part 1 is 0.4 mm, the thin part 4 is 0.03 mm, and the gate is 0.3 mm. In this example, the thickness of the thin portion 4 is 3/5 of the thickness of the vibrating portion 2.
It is.
【００１０】この形状のキャビティを備えた金型で成形
すると、樹脂はまず直径０．３ｍｍのゲート３より充填
が開始され、肉厚０．０５ｍｍの振動部２から圧力損失
の高い肉厚０．０３ｍｍに絞られた薄肉部４に到達する
と、振動部２の圧力が高まり振動部２全体に樹脂が充填
され、その後肉厚０．４ｍｍのエッジ部が充填される。
振動部２が充填される時は樹脂温は高温で流動性が高い
ため、振動部２にはショート、、ウェルドが発生しな
い。When molded with a mold having a cavity having this shape, the resin is first filled from the gate 3 having a diameter of 0.3 mm, and the resin having a thickness of 0.1 mm having a high pressure loss from the vibrating portion 2 having a thickness of 0.05 mm. When reaching the thin portion 4 squeezed to 03 mm, the pressure of the vibrating portion 2 increases, and the entire vibrating portion 2 is filled with resin, and then the edge portion having a thickness of 0.4 mm is filled.
When the vibrating portion 2 is filled, the resin temperature is high and the fluidity is high, so that no short circuit or weld occurs in the vibrating portion 2.
【００１１】なお、振動部肉厚に対する薄肉部肉厚の割
合は、樹脂材料の温度特性、樹脂充填時の温度、金型の
加熱温度等の諸条件により適宜設定されるが、一般には
２０％から８０％の範囲が最も好ましい。The ratio of the thickness of the thin portion to the thickness of the vibrating portion is appropriately set according to various conditions such as the temperature characteristics of the resin material, the temperature at the time of filling the resin, and the heating temperature of the mold. Is most preferred.
【００１２】[0012]
【発明の効果】本発明によれば、成形時にキャビティが
僅かに偏肉した場合であっても、ゲートから充填される
樹脂は、偏肉した振動部の厚肉の部分に偏って流れた
後、振動部とエッジ部の間に設けられた薄肉部に到達す
ると、樹脂はエッジ部に流れず偏肉した振動部の薄肉部
分が充填された後、エッジ部が充填されるため、振動部
に薄肉部分が存在する場合であっても、薄肉部分を完全
に充填するので、ショート、ウェルドのないスピーカ用
振動板が得られる。According to the present invention, even if the thickness of the cavity is slightly changed during molding, the resin filled from the gate flows unevenly to the thick portion of the uneven vibration portion. When the resin reaches the thin portion provided between the vibrating portion and the edge portion, the resin does not flow to the edge portion, the thin portion of the uneven vibrating portion is filled, and then the edge portion is filled. Even when a thin portion exists, the thin portion is completely filled, so that a speaker diaphragm without shorts and welds can be obtained.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明のスピーカ用振動板の形状を示す図。FIG. 1 is a view showing a shape of a speaker diaphragm of the present invention.
【図２】従来のスピーカ用振動板の形状を示す図。FIG. 2 is a diagram showing the shape of a conventional speaker diaphragm.
１ エッジ部 ２ 振動部 ３ ゲート ４ 薄肉部 DESCRIPTION OF SYMBOLS 1 Edge part 2 Vibration part 3 Gate 4 Thin part
───────────────────────────────────────────────────── フロントページの続き (72)発明者 溝根 信也 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (72)発明者 高橋 良幸 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 Ｆターム(参考） 5D016 AA12 AA14 FA01 GA04 HA06 JA08 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shinya Mizone 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F term (reference) 5D016 AA12 AA14 FA01 GA04 HA06 JA08
Claims (2)
に一定肉厚の振動部と外周部に厚肉のエッジ部を有する
スピーカ用樹脂振動板において、振動部とエッジ部の連
結位置に振動部肉厚より薄い薄肉部を設けたことを特徴
とするスピーカ用樹脂振動板。1. A speaker resin diaphragm having a dome-shaped central portion having a gate at a central portion thereof, a vibrating portion having a constant thickness at the center and a thicker edge portion at an outer peripheral portion, at a connection position between the vibrating portion and the edge portion. A resin diaphragm for a loudspeaker, wherein a thin portion is provided which is thinner than a thickness of the vibrating portion.
あることを特徴とする請求項１記載のスピーカ用樹脂振
動板。2. The resin diaphragm for a speaker according to claim 1, wherein the thickness of the thin portion is 20% to 80% of the thickness of the vibrating portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000054996A JP4262385B2 (en) | 2000-02-29 | 2000-02-29 | Injection molding method for speaker diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000054996A JP4262385B2 (en) | 2000-02-29 | 2000-02-29 | Injection molding method for speaker diaphragm |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001245385A true JP2001245385A (en) | 2001-09-07 |
| JP4262385B2 JP4262385B2 (en) | 2009-05-13 |
Family
ID=18576184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000054996A Expired - Fee Related JP4262385B2 (en) | 2000-02-29 | 2000-02-29 | Injection molding method for speaker diaphragm |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4262385B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006128938A (en) * | 2004-10-27 | 2006-05-18 | Pioneer Electronic Corp | Speaker apparatus |
| US7706560B2 (en) | 2004-10-27 | 2010-04-27 | Pioneer Corporation | Speaker apparatus |
-
2000
- 2000-02-29 JP JP2000054996A patent/JP4262385B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006128938A (en) * | 2004-10-27 | 2006-05-18 | Pioneer Electronic Corp | Speaker apparatus |
| US7706560B2 (en) | 2004-10-27 | 2010-04-27 | Pioneer Corporation | Speaker apparatus |
| JP4560372B2 (en) * | 2004-10-27 | 2010-10-13 | パイオニア株式会社 | Speaker device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4262385B2 (en) | 2009-05-13 |
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