JPS62224198A - Frame for loudspeaker - Google Patents
Frame for loudspeakerInfo
- Publication number
- JPS62224198A JPS62224198A JP61065811A JP6581186A JPS62224198A JP S62224198 A JPS62224198 A JP S62224198A JP 61065811 A JP61065811 A JP 61065811A JP 6581186 A JP6581186 A JP 6581186A JP S62224198 A JPS62224198 A JP S62224198A
- Authority
- JP
- Japan
- Prior art keywords
- frame
- plate
- magnetic circuit
- sheet
- pole yoke
- 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
Links
- 239000000835 fiber Substances 0.000 claims abstract description 11
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 5
- 239000011521 glass Substances 0.000 claims abstract description 5
- 238000000465 moulding Methods 0.000 abstract description 10
- 238000010438 heat treatment Methods 0.000 abstract description 6
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000004743 Polypropylene Substances 0.000 description 4
- 238000013016 damping Methods 0.000 description 4
- -1 polypropylene Polymers 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 229920000049 Carbon (fiber) Polymers 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000004917 carbon fiber Substances 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000009966 trimming Methods 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000037303 wrinkles Effects 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
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
- H04R31/006—Interconnection of transducer parts
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/34—Directing or guiding sound by means of a phase plug
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2400/00—Loudspeakers
- H04R2400/11—Aspects regarding the frame of loudspeaker transducers
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、一部に磁気ギャップを形成するための磁気回
路が取付けられ、振動板の周縁が貼着されて、振動板に
取付けられているボイスコイルを前記ギャップ内に位置
させるスピーカ用フレームに関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a magnetic circuit for forming a magnetic gap, which is attached to a part of the diaphragm by attaching a magnetic circuit to the periphery of the diaphragm. The present invention relates to a speaker frame in which a voice coil is positioned within the gap.
従来のこのようなスピーカの一例を第１０図に示す。 An example of such a conventional speaker is shown in FIG.
このスピーカの磁気回路は、プレート２、ポールヨーク
３、マグネット４で構成され、プレート２とポールヨー
ク３との間には磁気ギャップが形成されている。The magnetic circuit of this speaker is composed of a plate 2, a pole yoke 3, and a magnet 4, and a magnetic gap is formed between the plate 2 and the pole yoke 3.
フレーム１は、その中心下側が前記磁気回路、図におい
てはプレート２に固着され、その外周上面に振動板５の
周縁が貼着されている。The lower center of the frame 1 is fixed to the magnetic circuit, which is the plate 2 in the figure, and the periphery of the diaphragm 5 is adhered to the upper surface of the outer periphery.
そして、振動板５の中心の筒状のボイスコイル６が前記
磁気ギャップに挿入され、ボイスコイル６に信号電流を
流してこれを駆動し、振動板５を振動させるものである
。A cylindrical voice coil 6 at the center of the diaphragm 5 is inserted into the magnetic gap, and a signal current is passed through the voice coil 6 to drive it, causing the diaphragm 5 to vibrate.
前記プレート２とフレーム１との固着方法の一般的なも
のを第１１図〜第１３図に示す。A general method of fixing the plate 2 and frame 1 is shown in FIGS. 11 to 13.
第１１図は、フレーム１の下面とプレート２の上面を接
着剤で接着したものである。In FIG. 11, the lower surface of the frame 1 and the upper surface of the plate 2 are bonded together with an adhesive.
第１２図は、プレート２にネジ孔を穿設し、フレーム１
の透孔に挿通したビス７をこれに螺合したものである。Figure 12 shows that screw holes are drilled in the plate 2 and the frame 1 is
A screw 7 inserted through the through hole is screwed into this.
第１３図は、プレート２にダボ８ （図は半抜きダボ）
を形成し、これをフレーム１の透孔に挿入してカシメた
ものである。Figure 13 shows dowel 8 on plate 2 (the figure shows a half-cut dowel)
This is inserted into the through hole of the frame 1 and caulked.
このようなスピーカ用のフレームの材料としては、振動
板の振動を磁気回路に伝達しないため、高剛性、高強度
、割振効果等が要求されるが、現状においては、鉄板、
プラスチック、アルミダイカストが主として使用されて
きた。The materials for frames for such speakers are required to have high rigidity, high strength, and distribution effects, etc., in order to prevent the vibration of the diaphragm from being transmitted to the magnetic circuit.Currently, steel plates,
Plastic and aluminum die-casting have been mainly used.
鉄板としては、主としてその加工性、及び材料コストの
安さからして冷間圧延鋼板が広く用いられている。As iron plates, cold rolled steel plates are widely used mainly because of their workability and low material costs.
プラスチ・７りは、主としてインジェクション成型が用
いられており、その強度の増加のためにガラス、カーボ
ン繊維を混入したものが用いられることがあるが、イン
ジェクション成型のために繊維長が１ミリ以下と短かい
ため、剛性の向上は５０％以下であり、小口径のスピー
カに用いられているにすぎない。Injection molding is mainly used for plasti-7ri, and materials mixed with glass or carbon fiber are sometimes used to increase its strength, but due to injection molding, the fiber length is less than 1 mm. Because it is short, the improvement in rigidity is less than 50%, and it is only used in small-diameter speakers.
アルミダイカストは、意匠性、高剛性、制振効果におい
て優れている。Aluminum die casting has excellent design, high rigidity, and vibration damping effect.
フレーム（とプレート２の固着手段において、接着は、
接合強度が弱く、大型の磁気回路のものには使用できな
い。In the fixing means of the frame (and plate 2), the adhesive is
Bonding strength is weak and cannot be used for large magnetic circuits.
そして、ビス止めは加工工数が多くなるので、その加工
費が大となり、現在ではあまり使用されなくなっている
。Since screw fastening requires a large number of processing steps, the processing cost is high, and it is no longer used very often.
又、カシメは現在では最も多く用いられているが、半抜
きダボではダボの高さがインジェクション成型のフレー
ムの板厚よりも著るしく高くすることができず、カシメ
強度が不足する。Furthermore, caulking is currently the most commonly used method, but with half-blanked dowels, the height of the dowel cannot be made significantly higher than the thickness of the injection molded frame, resulting in insufficient caulking strength.
そして、鋼板フレームは、外観、息匠が良くないばかり
でなく、制振効果も期待できないので、低価格のスピー
カに使用されるだけである。Steel plate frames not only have poor appearance and quality, but also cannot be expected to have a damping effect, so they are only used for low-priced speakers.
又、プラスチックフレームは、その剛性は低いために、
小口径のスピーカに使用されるだけである。In addition, plastic frames have low rigidity, so
It is only used for small diameter speakers.
更に、アルミダイカストフレームは、金型コスト高、成
型サイクルが長い等によってコスト高となり、高級スピ
ーカに使用されるだけである。Furthermore, aluminum die-cast frames are expensive due to high mold costs and long molding cycles, and are only used for high-end speakers.
本発明は、従来の前述のようなスピーカ用フレームの欠
点を除去するためのもので、高強度、高剛性で割振効果
にも優れ、磁気回路の構成部品を埋設することで、磁気
回路の固着の問題点を解決することも可能で、然かも量
産性に富み、低コストのスピーカ用フレームを提供する
ことを目的とする。The present invention is intended to eliminate the drawbacks of the conventional speaker frames as mentioned above.It has high strength, high rigidity, and excellent distribution effect, and by embedding the magnetic circuit components, the magnetic circuit can be firmly fixed. The purpose of the present invention is to provide a low-cost speaker frame that can be mass-produced and is capable of solving the above problems.
Ｃ発明の概要〕
本発明は、前述の目的を達成するために、ガラス、カー
ボン等の長繊維で強化された熱可塑性樹脂を加熱、成型
して所要のフレームの形状としたスピーカ用のフレーム
を要旨とするものである。C. Summary of the Invention] In order to achieve the above-mentioned object, the present invention provides a frame for a speaker, which is formed into a desired frame shape by heating and molding a thermoplastic resin reinforced with long fibers such as glass or carbon. This is a summary.
（発明の実施例〕
本発明のスピーカ用フレームの一実施例と、その製造工
程の一例を、第１図〜第５図について説明する。(Embodiment of the Invention) An embodiment of the speaker frame of the present invention and an example of its manufacturing process will be described with reference to FIGS. 1 to 5. FIG.
第１図は、このフレーム１を示すもので、繊維長が１０
〜２００ミリのガラス或いはカーボンの繊維で強化され
、熱可塑性樹脂としてはポリプロピレンが用いられてい
るシートを加熱、成型して所要の形状としたものである
。Figure 1 shows this frame 1, in which the fiber length is 10
A sheet reinforced with ~200 mm glass or carbon fibers and using polypropylene as the thermoplastic resin is heated and molded into the desired shape.
このフレーム１の製造工程を第２図〜第５図に示す。The manufacturing process of this frame 1 is shown in FIGS. 2 to 5.
先づ第２図に示すように、前述の組成のシート１１を使
用の形状にブランクする。First, as shown in FIG. 2, a sheet 11 having the composition described above is blanked into the shape to be used.
このブランクされたシート１１は、成型工程に入る前に
柔軟化させる必要があり、第３図に示すように、上下の
加熱ヒータＩ２によって２０Ｑ〜２２０℃の加熱温度で
、３〜４分間加熱する。This blanked sheet 11 needs to be softened before entering the molding process, and as shown in FIG. 3, it is heated for 3 to 4 minutes at a heating temperature of 20Q to 220°C by upper and lower heaters I2. .
すると、シート１１は、第４図のように収縮するような
傾向を帯びて、全面に皺が発生して柔軟化する。As a result, the sheet 11 tends to shrink as shown in FIG. 4, and wrinkles appear on the entire surface, making it soft.
このシート１１を、第５図のように常温〜７゜℃に設定
されている金型１３の間に挾み、１００〜２５０ ｋＩ
ｒ／ ｃｎｆの成型圧力で３０〜５０秒間加圧し、成型
する。This sheet 11 is sandwiched between molds 13 set at room temperature to 7°C as shown in Fig. 5, and heated at 100 to 250 kI.
Press and mold at a molding pressure of r/cnf for 30-50 seconds.
この成型されたシート１１を金型がら取り出し、内外径
を所要形状に裁断するトリミング工程を経て、第１図の
フレーム１とする工程が完了する。This molded sheet 11 is taken out of the mold and undergoes a trimming process in which the inner and outer diameters are cut into a desired shape, completing the process of forming the frame 1 shown in FIG. 1.
このフレーム１は、ポリプロピレンの中に、繊維長１０
〜２００ミリのガラス、カーボンの繊維が混入されてい
るので、ポリプロピレンはこの繊維で強化され、且つこ
れ等の繊維は２００〜２２０°Ｃの温度では変質するこ
となく、その強度を維持している。This frame 1 is made of polypropylene with a fiber length of 10
~200mm of glass and carbon fibers are mixed in, so polypropylene is reinforced with these fibers, and these fibers maintain their strength without deteriorating at temperatures of 200-220°C. .
従って、これ等の繊維で強化されたポリプロピレンのシ
ートの高強度、高剛性は、フレーム形状に成型された後
もそのまま残り、強度、剛性に富むと共に、繊維強化プ
ラスチックの可撓性が生かされて、制振効果を発揮する
フレーム１となる。Therefore, the high strength and high rigidity of these fiber-reinforced polypropylene sheets remain intact even after being molded into a frame shape, making it possible to take advantage of the flexibility of fiber-reinforced plastics as well as being rich in strength and rigidity. , becomes frame 1 that exhibits a vibration damping effect.
このフレームｌに、従来の磁気回路のプレートの固着手
段が問題となる場合には、次のような手段で、磁気回路
構成の一部品を一体化することができる。If the conventional means for fixing the plate of the magnetic circuit to the frame l poses a problem, one part of the magnetic circuit structure can be integrated with the following means.
第６図、第７図は、プレート２を一体化する場合のもの
で、前実施例のプレス工程に入る際に、プレート２を金
型１３内に挿入しておく。6 and 7 show the case where the plate 2 is integrated, and the plate 2 is inserted into the mold 13 before entering the pressing process of the previous embodiment.
この時、プレート２の外周下面は、大きな面取り２ａを
行っておくと良い。At this time, it is advisable to make a large chamfer 2a on the lower surface of the outer periphery of the plate 2.
そして、この状態で柔軟化したシート１１を挾んで、前
と同条件で成型する。Then, in this state, the softened sheet 11 is sandwiched and molded under the same conditions as before.
すると、プレート２の上面と外周面はシート１１で被覆
されると共に、面取り２ａ内にもシート１１は入り込み
、金型Ｉ３から取り出して、トリミ、ングすることで、
第７図のフレーム１とすることができる。Then, the upper surface and outer peripheral surface of the plate 2 are covered with the sheet 11, and the sheet 11 also enters the chamfer 2a, and by taking it out from the mold I3 and trimming it,
This may be frame 1 in FIG.
第８図、第９図はポールヨーク３を一体化する場合のも
ので、前実施例と同様に、その成型に際して、シート１
１上にポールヨーク３を置いてプレスする。Figures 8 and 9 show the case where the pole yoke 3 is integrated, and as in the previous embodiment, when molding it, the sheet 1
Place pole yoke 3 on top of 1 and press.
・この時、ポールヨーク３の外周上面を大きく面取り３
ａすることで、第９図に示すようなポールヨーク３を埋
設したフレーム２が得られ、面取り３ａにもシート１１
が入り込むようにする。・At this time, greatly chamfer the upper surface of the outer periphery of the pole yoke 3.
By doing this, the frame 2 with the pole yoke 3 embedded therein as shown in FIG.
so that it can be included.
このようにしたフレーム１は、面取り２ａ、３ａ内にも
シート１１が入り込んでいるので、プレート２、ポール
ヨーク３がフレーム１から脱落することはない。In the frame 1 configured in this manner, the plate 2 and the pole yoke 3 do not fall off from the frame 1 because the sheet 11 is also inserted into the chamfers 2a and 3a.
従って、これ等のプレート２、ポールヨーク３に対して
マグネット４を含む残りの磁気回路部品を組付ければ、
従来のようなフレーム１とプレート２の固着手段を必要
としなくなり、その固着に対する問題点を解消すること
もできる。Therefore, if the remaining magnetic circuit parts including the magnet 4 are assembled to these plate 2 and pole yoke 3,
There is no need for a means for fixing the frame 1 and the plate 2 as in the past, and the problems associated with the fixation can also be solved.
本発明は叙上のように、フレームをガラス、カーボンの
長繊維で強化された熱可塑性の樹脂のシートを加熱、プ
レス成型したものであるから、前記繊維の強靭性とその
長さが剛性、強度を高めると共に、そのフレキシビリテ
ィが制振効果を発揮する。As described above, the frame of the present invention is made by heating and press-molding a thermoplastic resin sheet reinforced with long fibers of glass and carbon. In addition to increasing strength, its flexibility provides vibration damping effects.
それにより振動板の振動に対するフレームの共振や、振
動板の外周縁のエツジからフレームを介して磁気回路へ
の振動の伝達が防止され、スピーカとしての性能を向上
させることができる。This prevents resonance of the frame with respect to the vibration of the diaphragm and transmission of vibration from the edge of the outer periphery of the diaphragm to the magnetic circuit through the frame, thereby improving the performance of the speaker.
又、フレームの成型時に、プレートやポールヨークを一
体的に埋設し、フレームとプレートやポールヨークの接
合を強固にすることができ、従来の接着の接合の弱さ、
ビス止めの煩雑な手数、及びカシメ時の諸問題が改善さ
れ、且つフレームと磁気回路部品との間のビビリを起す
ことがない等の効果を得ることも可能である。In addition, when molding the frame, the plate and pole yoke are embedded integrally, making it possible to strengthen the bond between the frame and the plate and pole yoke, eliminating the weakness of conventional adhesive bonding.
It is possible to reduce the troublesome work involved in fixing screws and various problems during caulking, and also to avoid chatter between the frame and the magnetic circuit components.
第１図は本発明の一実施例の断面図、第２図〜第５図は
その製造工程を示すもので、第２図はブランク状態の斜
面図、第３図は加熱工程の側面図、第４図は加熱工程完
了時の斜面図、第５図はプレス成型工程の断面図、第７
図と第９図はそれぞれ別の実施例の断面図、第６図と第
８図はそのプレス工程を示す断面図、第１０図はスピー
カの一例の断面図、第１１図〜第１３図は従来のフレー
ムとプレートの接合方法を示す断面図である。
１・・・フレーム、２・・・プレート、３・・・ホール
ヨーク、１１・・・シート、１２・・・加熱ヒータ、１
３・・・金型。
特許出願人 パイオニア株式会社第３図
第４図
第７図
第８図
第９図
第１０
−ｆプ
第１Ｉ図
第１２図
第１３図
一へFig. 1 is a sectional view of an embodiment of the present invention, Figs. 2 to 5 show the manufacturing process thereof, Fig. 2 is a perspective view of a blank state, Fig. 3 is a side view of the heating process, Figure 4 is a slope view when the heating process is completed, Figure 5 is a sectional view of the press molding process, and Figure 7 is a cross-sectional view of the press forming process.
9 and 9 are sectional views of different embodiments, FIG. 6 and 8 are sectional views showing the pressing process, FIG. 10 is a sectional view of an example of a speaker, and FIGS. 11 to 13 are sectional views of different embodiments. FIG. 3 is a cross-sectional view showing a conventional method of joining a frame and a plate. DESCRIPTION OF SYMBOLS 1...Frame, 2...Plate, 3...Holyoke, 11...Seat, 12...Heater, 1
3...Mold. Patent Applicant: Pioneer Corporation Figure 3 Figure 4 Figure 7 Figure 8 Figure 9 Figure 10-f Figure 1I Figure 12 Figure 13 Figure 1
Claims (1)
脂のシートで成型され、磁気回路の構成部品であるプレ
ート、ポールヨーク等の部品が固着され、且つ振動板の
周縁が貼着されることを特徴とするスピーカ用フレーム
。Molded from a sheet of thermoplastic resin reinforced with long fibers such as glass or carbon, to which components of the magnetic circuit such as plates and pole yokes are fixed, and to which the periphery of the diaphragm is attached. A speaker frame featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61065811A JPS62224198A (en) | 1986-03-26 | 1986-03-26 | Frame for loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61065811A JPS62224198A (en) | 1986-03-26 | 1986-03-26 | Frame for loudspeaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62224198A true JPS62224198A (en) | 1987-10-02 |
Family
ID=13297781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61065811A Pending JPS62224198A (en) | 1986-03-26 | 1986-03-26 | Frame for loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62224198A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1280378A2 (en) * | 2001-07-23 | 2003-01-29 | Pioneer Corporation | Electroacoustic transducer frame and method of making the same |
| JPWO2002032187A1 (en) * | 2000-10-06 | 2004-02-26 | 三菱電機株式会社 | Speaker device, speaker device manufacturing method, and speaker device manufacturing device |
| CN102615915A (en) * | 2011-01-29 | 2012-08-01 | 谭医助 | Preparation method of embedded halogen-free glass fiber enhanced plate |
| WO2023093950A1 (en) * | 2021-11-26 | 2023-06-01 | Continental Engineering Services Gmbh | Sound actuator with robust positioning of magnetic pole plate packets |
-
1986
- 1986-03-26 JP JP61065811A patent/JPS62224198A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2002032187A1 (en) * | 2000-10-06 | 2004-02-26 | 三菱電機株式会社 | Speaker device, speaker device manufacturing method, and speaker device manufacturing device |
| EP1280378A2 (en) * | 2001-07-23 | 2003-01-29 | Pioneer Corporation | Electroacoustic transducer frame and method of making the same |
| EP1280378A3 (en) * | 2001-07-23 | 2007-01-24 | Pioneer Corporation | Electroacoustic transducer frame and method of making the same |
| CN102615915A (en) * | 2011-01-29 | 2012-08-01 | 谭医助 | Preparation method of embedded halogen-free glass fiber enhanced plate |
| WO2023093950A1 (en) * | 2021-11-26 | 2023-06-01 | Continental Engineering Services Gmbh | Sound actuator with robust positioning of magnetic pole plate packets |
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