WO1999065272A1 - Method of producing speaker diaphragm and speaker diaphragm formed by this method and speaker using this - Google Patents
Method of producing speaker diaphragm and speaker diaphragm formed by this method and speaker using this Download PDFInfo
- Publication number
- WO1999065272A1 WO1999065272A1 PCT/JP1999/003140 JP9903140W WO9965272A1 WO 1999065272 A1 WO1999065272 A1 WO 1999065272A1 JP 9903140 W JP9903140 W JP 9903140W WO 9965272 A1 WO9965272 A1 WO 9965272A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- speaker
- diaphragm
- speaker diaphragm
- polyolefin
- reaction tank
- 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.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
- H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
Definitions
- the present invention relates to a method of manufacturing a speaker diaphragm, a speaker diaphragm formed by the method, and a speaker using the same.
- the present invention relates to a method for manufacturing a speaker diaphragm used for various types of audio equipment, a speed diaphragm formed by the method, and a speaker using the same.
- Reference numeral 15 denotes a magnetic circuit portion, which is composed of a magnet 15a, a lower plate 15b, and an upper plate 15c.
- Reference numeral 16 denotes a frame which is adhesively bonded to the magnetic circuit portion 15; reference numeral 17 denotes an outer periphery which is adhesively bonded to the frame 16; and an inner periphery which is coiled with the magnetic gap 15d of the magnetic circuit portion 15 described above.
- a damper which supports the voice coil 18 by being adhesively bonded to the voice coil 18 in which the portion 18a is fitted.
- Numeral 19 denotes a diaphragm for speed force, which is adhesively bonded to the frame 16 via an edge 19a which is adhesively bonded to the outer periphery, and the inner circumference is adhesively bonded to the voice coil 18.
- a sheet mainly composed of paper or a resin molded thin plate is generally selected according to the environmental resistance and the required acoustic characteristics.
- Typical vibrations made of resin among the above diaphragms for speed force 19 The method of manufacturing the plate will be described with reference to a polyolefin-based polyethylene diaphragm for force.
- polyethylene-based speaker diaphragms have a low material density and can reduce the weight of the diaphragm for speeding force, and the internal loss against mechanical vibration is relatively large, thus improving the frequency characteristics of the speaker. Although it has characteristics and is widely used, it is indispensable to activate the surface of the speaker diaphragm in order to improve the adhesive strength due to poor adhesiveness.
- Conventional methods for activating the surface of the diaphragm for speeding force include a method of applying a primer after corona discharge or a parallel plate as shown in Figs. 8 and 9. It is generally known that a surface treatment of the diaphragm for speed force 19 is performed by a gas plasma processing method using the mold electrodes 20 and 21.
- the temperature inside the reactor became higher than 80 ° C, and the diaphragm for speed force deformed during corona discharge.
- the one using the parallel plate type electrode 20 shown in FIG. There is a problem with the possibility of thermal deformation of the plate 19 and the productivity, and the one using the parallel plate type electrode 21 in Fig. 9 has a problem with the productivity of the speaker diaphragm 19, Although the problem can be solved by handling a plurality of speaker diaphragms 19, there is a possibility of thermal deformation, and there is a problem that the difference in wettability between the peripheral part and the central part is remarkable.
- the present invention solves the above-mentioned problems, and provides a manufacturing method capable of obtaining a diaphragm for speed force with stable quality and high productivity. Speaker can be provided. Disclosure of the invention
- a method of manufacturing a speaker diaphragm comprises: disposing a resin-made diaphragm for spin force formed by injection molding or sheet heating molding in a reaction tank; An electrode is provided on the loudspeaker diaphragm to perform plasma processing on the loudspeaker diaphragm to activate the surface.
- an electrode is provided on the loudspeaker diaphragm to perform plasma processing on the loudspeaker diaphragm to activate the surface.
- the plasma treatment is performed at a temperature equal to or lower than the thermal deformation temperature of the plate, thereby preventing the thermal deformation of the speaker diaphragm and suppressing the occurrence of defects due to the thermal deformation.
- FIG. 1 is a perspective view for explaining a plasma treatment of a speed force diaphragm as an embodiment of a method for manufacturing a speaker diaphragm of the present invention
- FIG. Fig. 3 is a cross-sectional view illustrating the arrangement of force diaphragms.
- Fig. 3 is a diagram of temperature change during continuous operation of the quartz reaction tank.
- 5 is a cross-sectional view of the joined state of the speaker diaphragm and the voice coil
- FIG. 6 is a cross-sectional view of the joined state of the speaker diaphragm and the edge
- FIG. 8 is a cross-sectional view for explaining plasma processing using parallel plate type electrodes of the speaker diaphragm, which is the main part of the speaker diaphragm.
- FIG. 9 is a sectional view of the speaker diaphragm, which is the main part of FIG.
- FIG. 9 is a cross-sectional view illustrating a plasma process using another parallel plate electrode.
- reference numeral 1 denotes a cylindrical quartz reaction tank, in which a cylindrical aluminum etching tunnel 2 subjected to mesh processing is provided, and held inside by a speaker diaphragm fixing device 3 therein. Speaker diaphragms 4 (equivalent to 19 of the prior art) are juxtaposed at approximately equal intervals.
- Reference numeral 6 denotes a gas inlet provided in the reaction tank 1. The reaction gas A flows into the reaction tank 1 from the gas inlet 6 through the etching tunnel 2 formed of an aluminum mesh.
- Reference numeral 5 denotes electrodes, and two pairs are provided outside the reaction tank 1 so as to face each other.
- 7 is a gas exhaust port.
- ultra-high-molecular polyethylene resin “Lubmer” (trade name) manufactured by Co., Ltd. was used to form a 16 cm-diameter speaker diaphragm 4 by composite molding of injection or press. .
- Table 1 shows that
- the thermal deformation temperature of this resin is 82 ° C, and there is a risk that the speaker diaphragm 4 will be deformed if the temperature of the reaction tank 1 becomes 80 ° C or more. .
- the size of the quartz reaction tank 1 is 300 mm in diameter and 300 mm in length, and as shown in Fig. 2, a speaker diaphragm 4 with a diameter of 16 cm is placed at intervals of 15 ⁇ . 0 sheets were arranged.
- the reaction gas ⁇ used oxygen gas.
- FIG. 3 shows the temperature change during continuous operation under the above conditions. As is clear from FIG. 3, the temperature in the reaction tank is stable at about 45 ° C. even during continuous operation for 12 hours, and the speaker diaphragm 4 does not deform.
- the wettability of the speaker diaphragm 4 obtained as described above is 50 dyn / cm or more at any part of the speaker diaphragm 4, and the plasma treatment is more enhanced by the mesh etching tunnel 2. This is probably because the work was performed uniformly.
- the wettability B immediately after the treatment is relatively high at 46 dyn Z cm, but deteriorates with the passage of time, and after 200 hours. Drops to about 36 dyn / cm.
- the primer treated with the above-mentioned primer was wet as high as 50 dyn / cm immediately after the treatment, and even after a lapse of time, 44 dyn Z It was confirmed to be stable with high wettability of cm.
- the voice coil 18 and the edge 19 a are bonded to the pressure-sensitive vibrating plate 4 coated with the primer after the plasma treatment of the above-described embodiment by the adhesives 12, 13. After bonding a primer to the conventional corona discharge and bonding the voice coil and edge together, a strength comparison was performed.
- the voice coil 18 shown in FIG. 5 has a (/) 32 diameter, and the adhesive 13 is bonded and fixed to the diaphragm 4 for speed force using a two-component reactive acryl adhesive. The voice coil was pulled in the direction of the arrow, and the adhesive strength was measured.
- the edge 19a shown in FIG. 6 is made of a rubber material.
- the vibration plate 4 for pressure force is bonded to the adhesive 12 using a butyl rubber-based solvent-type adhesive, and has a width of 25 mm. Then, a peel strength test was performed with an adhesive surface having a length of 5 mm.
- the conventional one using the corona discharge causes adhesion peeling at 70 W input to the loudspeaker, whereas the one using the plasma treatment of the present embodiment is 120 W
- the voice coil 18 was burned out, and it was confirmed that the voice coil 18 had extremely high adhesion without peeling off.
- the electrode 5 is provided outside the reaction tank 1 and the plasma treatment is performed to suppress the temperature rise in the reaction tank 1 and prevent the thermal vibration plate 4 from being thermally deformed. Further, by mounting the vibration plate for speeding force 4 in a metal mesh frame, it is possible to uniformly perform the plasma processing, thereby improving the productivity. Industrial applicability
- the method for manufacturing a speaker diaphragm of the present invention includes a resin-made speaker diaphragm formed by injection molding or sheet heat molding.
- the temperature in the reaction tank is set to be equal to or lower than the thermal deformation temperature of the speaker diaphragm, and plasma processing is performed on the speaker diaphragm.
- the temperature inside the reactor is kept below the thermal deformation temperature of the speaker diaphragm, preventing the thermal deformation of the speaker diaphragm and preventing the occurrence of defects due to the thermal deformation. It can be suppressed.
- the gas passes through the metal mesh. Since it diffuses into the reaction tank almost uniformly, the surface is activated almost uniformly, and the wettability as a speaker diaphragm is high and the quality is stable.
- the primer of the plasma type after the plasma treatment it is possible to further improve the adhesiveness and stabilize the quality.
- the use of a simple substance or copolymer of a polyolefin resin such as polyethylene or polypropylene or a simple substance or copolymer of a polyimide resin as the material of the above-mentioned speaker diaphragm is improved in adhesiveness and quality. The stability is obtained with a very wide range of speaker diaphragms.
- the speaker formed using the speaker diaphragm obtained as described above has been improved in resistance to homogeneity and improvement of the coupling strength between the diaphragm for speech force and the edge and / or voice coil. It can provide speakers with improved input.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP99924013A EP1005251B1 (en) | 1998-06-12 | 1999-06-11 | Method of producing speaker diaphragm and speaker diaphragm formed by this method and speaker using this |
| DE69939361T DE69939361D1 (de) | 1998-06-12 | 1999-06-11 | N und lautsprechermembran hergestellt nach diesem verfahren und lautsprecher mit anwendung einer solchen membran |
| US09/485,037 US6627140B1 (en) | 1998-06-12 | 1999-06-11 | Method for manufacturing diaphragm for loudspeaker |
| US10/613,455 US7072485B2 (en) | 1998-06-12 | 2003-07-03 | Method for manufacturing diaphragm for loudspeaker, diaphragm for loudspeaker made thereby, and loudspeaker using the same |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10/164892 | 1998-06-12 | ||
| JP10164892A JPH11355895A (ja) | 1998-06-12 | 1998-06-12 | スピーカ用振動板の製造方法 |
Related Child Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US09/485,037 A-371-Of-International US6627140B1 (en) | 1998-06-12 | 1999-06-11 | Method for manufacturing diaphragm for loudspeaker |
| US09485037 A-371-Of-International | 1999-06-11 | ||
| US10/613,455 Division US7072485B2 (en) | 1998-06-12 | 2003-07-03 | Method for manufacturing diaphragm for loudspeaker, diaphragm for loudspeaker made thereby, and loudspeaker using the same |
| US10/613,456 Division US20040094357A1 (en) | 1998-06-12 | 2003-07-03 | Method for manufacturing diaphragm for loudspeaker, diaphragm for loudspeaker made thereby, and loudspeaker using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1999065272A1 true WO1999065272A1 (en) | 1999-12-16 |
Family
ID=15801868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP1999/003140 Ceased WO1999065272A1 (en) | 1998-06-12 | 1999-06-11 | Method of producing speaker diaphragm and speaker diaphragm formed by this method and speaker using this |
Country Status (6)
| Country | Link |
|---|---|
| US (3) | US6627140B1 (ja) |
| EP (1) | EP1005251B1 (ja) |
| JP (1) | JPH11355895A (ja) |
| CN (1) | CN1270582C (ja) |
| DE (1) | DE69939361D1 (ja) |
| WO (1) | WO1999065272A1 (ja) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11355895A (ja) * | 1998-06-12 | 1999-12-24 | Matsushita Electric Ind Co Ltd | スピーカ用振動板の製造方法 |
| JP3886391B2 (ja) * | 2002-02-15 | 2007-02-28 | シャープ株式会社 | カード型装置、及び、それを備えた電子機器 |
| JP2007110209A (ja) * | 2005-10-11 | 2007-04-26 | Matsushita Electric Ind Co Ltd | スピーカ |
| US8889534B1 (en) * | 2013-05-29 | 2014-11-18 | Tokyo Electron Limited | Solid state source introduction of dopants and additives for a plasma doping process |
| TW201545564A (zh) * | 2014-05-16 | 2015-12-01 | B O B Co Ltd | 喇叭振動片及其放電處理模製方法 |
| USD835063S1 (en) * | 2017-04-18 | 2018-12-04 | Weiquan Wu | Bluetooth loudspeaker |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05168093A (ja) * | 1991-12-10 | 1993-07-02 | Foster Electric Co Ltd | 電気音響変換器 |
| JPH06225388A (ja) * | 1993-01-28 | 1994-08-12 | Hokushin Ind Inc | スピーカー |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5634297A (en) * | 1979-08-29 | 1981-04-06 | Kenzo Inoue | Speaker unit |
| JPS6048696A (ja) * | 1983-08-26 | 1985-03-16 | Onkyo Corp | スピ−カ用振動板の製造方法 |
| US4725345A (en) * | 1985-04-22 | 1988-02-16 | Kabushiki Kaisha Kenwood | Method for forming a hard carbon thin film on article and applications thereof |
| JPH01279699A (ja) * | 1988-05-06 | 1989-11-09 | Mitsubishi Electric Corp | スピーカ用振動板の製造方法 |
| JPH0757039B2 (ja) * | 1988-05-09 | 1995-06-14 | 株式会社ケンウッド | 音響用振動板及びその製造法 |
| JP3217415B2 (ja) | 1991-12-20 | 2001-10-09 | 株式会社日清製粉グループ本社 | 粉体分散装置 |
| JP3194022B2 (ja) * | 1992-07-06 | 2001-07-30 | 東京エレクトロン株式会社 | プラズマ表面処理の制御装置 |
| JPH06272035A (ja) * | 1993-03-16 | 1994-09-27 | Nippon Steel Corp | プラズマ処理装置 |
| JPH11355895A (ja) * | 1998-06-12 | 1999-12-24 | Matsushita Electric Ind Co Ltd | スピーカ用振動板の製造方法 |
-
1998
- 1998-06-12 JP JP10164892A patent/JPH11355895A/ja active Pending
-
1999
- 1999-06-11 CN CNB99800930XA patent/CN1270582C/zh not_active Expired - Fee Related
- 1999-06-11 US US09/485,037 patent/US6627140B1/en not_active Expired - Fee Related
- 1999-06-11 WO PCT/JP1999/003140 patent/WO1999065272A1/ja not_active Ceased
- 1999-06-11 EP EP99924013A patent/EP1005251B1/en not_active Expired - Lifetime
- 1999-06-11 DE DE69939361T patent/DE69939361D1/de not_active Expired - Fee Related
-
2003
- 2003-07-03 US US10/613,455 patent/US7072485B2/en not_active Expired - Lifetime
- 2003-07-03 US US10/613,456 patent/US20040094357A1/en not_active Abandoned
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05168093A (ja) * | 1991-12-10 | 1993-07-02 | Foster Electric Co Ltd | 電気音響変換器 |
| JPH06225388A (ja) * | 1993-01-28 | 1994-08-12 | Hokushin Ind Inc | スピーカー |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP1005251A4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1005251B1 (en) | 2008-08-20 |
| EP1005251A1 (en) | 2000-05-31 |
| JPH11355895A (ja) | 1999-12-24 |
| US7072485B2 (en) | 2006-07-04 |
| DE69939361D1 (de) | 2008-10-02 |
| US20040094356A1 (en) | 2004-05-20 |
| EP1005251A4 (en) | 2005-03-02 |
| CN1273015A (zh) | 2000-11-08 |
| US6627140B1 (en) | 2003-09-30 |
| CN1270582C (zh) | 2006-08-16 |
| US20040094357A1 (en) | 2004-05-20 |
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