JP4541228B2

JP4541228B2 - Diaphragm for portable device speaker, manufacturing method thereof, and manufacturing apparatus used in the manufacturing method

Info

Publication number: JP4541228B2
Application number: JP2005142292A
Authority: JP
Inventors: 豊松本
Original assignee: 株式会社加西産業
Priority date: 2005-05-16
Filing date: 2005-05-16
Publication date: 2010-09-08
Anticipated expiration: 2025-05-16
Also published as: JP2006319834A

Description

本発明は、携帯機器の画面上に重ねて設けられる携帯機器用スピーカの振動板、該振動板を製造する製造方法及びその製造方法に用いられる製造装置に関する。 The present invention relates to a diaphragm for a portable device speaker provided on a screen of a portable device, a manufacturing method for manufacturing the diaphragm, and a manufacturing apparatus used in the manufacturing method.

一般に、例えば携帯電話機のような携帯機器には、画像や文字等を表示するための画面が設けられるとともに、着信音等の音声を出力するためのスピーカが設けられている。近年、上記画面の大きさは、一度に表示可能な情報量を増やすために大型化しており、一方、携帯機器の大きさは、携行を容易にするために小型化している。従って、携帯機器ではスピーカを配設するためのスペースが狭くなってきている。その結果、スピーカの振動板を小さくせざるを得なくなって、十分な音圧を確保するのが難しくなる。 In general, a mobile device such as a mobile phone is provided with a screen for displaying images, characters, and the like and a speaker for outputting sound such as a ringtone. In recent years, the size of the screen has been increased in order to increase the amount of information that can be displayed at one time, while the size of portable devices has been reduced in order to facilitate carrying. Therefore, the space for disposing the speakers is becoming narrower in portable devices. As a result, the diaphragm of the speaker must be made small, and it becomes difficult to ensure a sufficient sound pressure.

そこで、携帯機器においては、例えば特許文献１に開示されているように、画面上に重ねて設けられた透明な樹脂製の振動板を、永久磁石及びボイスコイルで構成された振動源により振動させることにより、電気信号を音声に変換するスピーカが用いられる場合がある。 Therefore, in a portable device, for example, as disclosed in Patent Document 1, a transparent resin diaphragm provided on a screen is vibrated by a vibration source including a permanent magnet and a voice coil. Thus, a speaker that converts an electrical signal into sound may be used.

この特許文献１の振動板は、振動源により加振される板状の振動部と、携帯機器に保持される枠状の保持部とに分割されている。これら振動部と保持部との間には弾性材料からなる弾性部が設けられ、この弾性部は、上記振動部と保持部とに接合されている。このように振動部と保持部との間に弾性部を設けることにより、振動部が保持部に対し弾性支持されて該振動部の振動が許容される。
特開２００２−２５２８９５号公報 The diaphragm disclosed in Patent Document 1 is divided into a plate-like vibrating part that is vibrated by a vibration source and a frame-like holding part that is held by a portable device. An elastic part made of an elastic material is provided between the vibrating part and the holding part, and the elastic part is joined to the vibrating part and the holding part. Thus, by providing the elastic part between the vibration part and the holding part, the vibration part is elastically supported by the holding part, and the vibration of the vibration part is allowed.
JP 2002-252895 A

ところで、特許文献１のような樹脂製の振動板は、射出成形法を用いて製造することが多い。この射出成形法は、樹脂材料を樹脂材料通路により成形型のキャビティに流入させて成形する方法であるため、樹脂材料通路の下流端は成形面に開口することになる。この樹脂材料通路が成形面に開口していることにより、成形後に振動部及び保持部を成形面から離脱する際、樹脂材料通路のキャビティ近傍の樹脂材料が振動部及び保持部の表面から分離することになる。このことにより、振動部及び保持部には、ゲート跡と呼ばれる樹脂材料通路の跡が残る。これら振動部及び保持部のうち、振動部に残った樹脂材料通路の跡は、該振動部が画面を覆うものであるため使用者の目に付きやすく目立ってしまい、振動板の見栄えを悪化させる要因となる。従って、振動部に残った樹脂材料通路の跡は除去する必要があり、振動板の製造工数の削減が困難である。 By the way, a resin-made diaphragm like patent document 1 is often manufactured using an injection molding method. Since this injection molding method is a method in which a resin material is caused to flow into the mold cavity through the resin material passage, the downstream end of the resin material passage opens in the molding surface. By opening the resin material passage on the molding surface, the resin material in the vicinity of the cavity of the resin material passage is separated from the surfaces of the vibration portion and the holding portion when the vibration portion and the holding portion are separated from the molding surface after molding. It will be. As a result, a trace of a resin material passage called a gate trace remains on the vibrating portion and the holding portion. Among these vibrating parts and holding parts, the traces of the resin material passage remaining in the vibrating part are conspicuous and easily noticeable by the user because the vibrating part covers the screen, deteriorating the appearance of the diaphragm. It becomes a factor. Therefore, it is necessary to remove the trace of the resin material passage remaining in the vibration part, and it is difficult to reduce the number of manufacturing steps of the vibration plate.

本発明は斯かる点に鑑みてなされたものであり、その目的とするところは、振動板を射出成形法を用いて製造する場合に、樹脂材料通路の跡が振動部の外観に現れないようにすることで、樹脂材料通路の跡を除去する作業を不要にしながら振動板の見栄えを良好にし、ひいては、振動板の製造工数を削減することにある。 The present invention has been made in view of such a point, and the object of the present invention is to prevent the trace of the resin material passage from appearing on the appearance of the vibration part when the vibration plate is manufactured using an injection molding method. Thus, it is necessary to improve the appearance of the diaphragm while eliminating the work of removing the trace of the resin material passage, and to reduce the number of manufacturing steps of the diaphragm.

上記目的を達成するために、請求項１の発明では、携帯機器用スピーカの振動板の発明として、振動部に弾性部が接合する接合面を設け、該接合面に樹脂材料通路の跡を残すようにした。 In order to achieve the above object, according to the first aspect of the present invention, as the invention of the diaphragm of the speaker for portable equipment, a joint surface to which the elastic portion is joined is provided on the vibration portion, and a trace of the resin material passage is left on the joint surface. I did it.

具体的には、携帯機器の画面上に重ねて設けられる携帯機器用スピーカの振動板を対象とする。 Specifically, the diaphragm of the speaker for portable devices provided on the screen of the portable device is the target.

そして、上記画面を覆う板状に形成され、振動源により加振される樹脂製の振動部と、上記振動部の外周部と間隔をあけて設けられ、上記携帯機器のケースに保持される保持部と、上記振動部と保持部との間に設けられ、該振動部を保持部に対し弾性支持する弾性部とを備え、上記振動部には、上記弾性部が接合する接合面が設けられ、上記接合面には、上記振動部を成形型で成形する際に形成された樹脂材料通路の跡が残されている構成とする。 And it is formed in the shape of a plate that covers the screen, and is provided with a resin-made vibration part that is vibrated by a vibration source and spaced from the outer periphery of the vibration part, and is held by the case of the portable device. And an elastic portion that is provided between the vibrating portion and the holding portion and elastically supports the vibrating portion with respect to the holding portion, and the vibrating portion is provided with a joint surface to which the elastic portion is joined. In addition, the joint surface has a structure in which a trace of a resin material passage formed when the vibrating portion is molded with a molding die is left.

この構成によれば、振動部の接合面には弾性部が接合するので、該接合面に残っている樹脂材料通路の跡が弾性部により覆われて隠れた状態になる。これにより、樹脂材料通路の跡が振動部の外観に現れなくなる。 According to this configuration, since the elastic portion is bonded to the bonding surface of the vibration portion, the trace of the resin material passage remaining on the bonding surface is covered and hidden by the elastic portion. Thereby, the trace of the resin material passage does not appear on the appearance of the vibration part.

請求項２の発明では、携帯機器用スピーカの振動板を製造する製造方法として、振動部成形用キャビティを形成した後、樹脂材料を該振動部成形用キャビティに流入させる際、振動部の弾性部が接合する面に対応する箇所から流入させるようにした。 According to a second aspect of the present invention, as a manufacturing method of manufacturing a diaphragm for a speaker for a portable device, when a resin material is allowed to flow into the vibration part molding cavity after forming the vibration part molding cavity, the elastic part of the vibration part It was made to flow in from the part corresponding to the surface which joins.

具体的には、画面を覆う板状に形成され、振動源により加振される振動部と、該振動部の外周部と間隔をあけて設けられ、携帯機器のケースに保持される保持部と、上記振動部と保持部との間に設けられてこれら振動部及び保持部に接合し、該振動部を保持部に対し弾性支持する弾性部とを備えた携帯機器用スピーカの振動板を製造する製造方法を対象とする。 Specifically, a vibration part that is formed in a plate shape that covers the screen and is vibrated by a vibration source, and a holding part that is provided at a distance from the outer peripheral part of the vibration part and is held by the case of the mobile device, And manufacturing a diaphragm for a speaker for a portable device provided with an elastic portion provided between the vibrating portion and the holding portion, joined to the vibrating portion and the holding portion, and elastically supporting the vibrating portion with respect to the holding portion. The manufacturing method is intended.

そして、可動型と固定型とを型閉じして、該可動型の第１成形面と固定型の第２成形面とにより振動部成形用キャビティ及び保持部成形用キャビティを形成する工程と、樹脂材料を樹脂材料通路により、上記振動部の弾性部が接合する面に対応する箇所から上記振動部成形用キャビティに流入させる工程と、樹脂材料を樹脂材料通路により、上記保持部成形用キャビティに流入させる工程と、上記振動部成形用キャビティ及び保持部成形用キャビティに流入した樹脂材料を固化させて得られた一次成形品を上記第１成形面に保持した状態で、上記可動型と固定型とを型開きする工程と、上記一次成形品を保持した可動型を、該一次成形品が上記固定型の第３成形面と対向するまで移動させて該可動型と固定型とを型閉じして弾性部成形用キャビティを形成する工程と、上記弾性部成形用キャビティに弾性材料を流入させて上記一次成形品と一体成形する工程とを備える構成とする。 And a step of closing the movable mold and the fixed mold, and forming a vibration part molding cavity and a holding part molding cavity by the first molding surface of the movable mold and the second molding surface of the stationary mold, and resin A step of flowing material into the vibrating portion molding cavity from a position corresponding to a surface to which the elastic portion of the vibrating portion is joined by a resin material passage, and a flow of resin material into the holding portion molding cavity through the resin material passage. And the movable mold and the fixed mold in a state where the primary molded product obtained by solidifying the resin material flowing into the vibration part molding cavity and the holding part molding cavity is held on the first molding surface. And opening the movable mold holding the primary molded product until the primary molded product faces the third molding surface of the fixed mold to close the movable mold and the fixed mold. Elastic part molding carrier Forming a tee and allowed to flow into the elastic material in the elastic portion molding cavities a structure and a step of integrally molded with the primary molded product.

この構成によれば、可動型と固定型とを型閉じして形成された振動部成形用キャビティ及び保持部成形用キャビティに流入した樹脂材料が固化した後に、可動型と固定型とを型開きすると、樹脂材料通路の振動部成形用キャビティ近傍の樹脂材料が振動部から分離するとともに、樹脂材料通路の保持部成形用キャビティ近傍の樹脂材料が保持部から分離する。このとき、振動部成形用キャビティには、樹脂材料を振動部の弾性部が接合する面に対応する箇所から流入させているので、振動部には、弾性部が接合する面に樹脂材料通路の跡が残る。そして、可動型を移動させた後に該可動型と固定型とを型閉じして形成された弾性部成形用キャビティに弾性材料を流入させると、該弾性材料は、振動部の弾性部が接合する面を覆うように広がって成形されて弾性部となる。従って、上記振動部に残った樹脂材料通路の跡は弾性部により覆われることになる。これにより、樹脂材料通路の跡が振動部の外観に現れなくなる。 According to this configuration, the movable mold and the stationary mold are opened after the resin material flowing into the vibrating section molding cavity and the holding section molding cavity formed by closing the mold is solidified. Then, the resin material in the vicinity of the vibration part molding cavity in the resin material passage is separated from the vibration part, and the resin material in the vicinity of the holding part molding cavity in the resin material passage is separated from the holding part. At this time, since the resin material is caused to flow into the vibration part molding cavity from a position corresponding to the surface to which the elastic part of the vibration part is joined, the vibration part has a resin material passage on the surface to which the elastic part is joined. Traces remain. Then, when the elastic material is caused to flow into the elastic part molding cavity formed by closing the movable mold and the fixed mold after moving the movable mold, the elastic material is joined to the elastic part of the vibration part. The elastic part is formed by spreading so as to cover the surface. Therefore, the trace of the resin material passage remaining in the vibration part is covered with the elastic part. Thereby, the trace of the resin material passage does not appear on the appearance of the vibration part.

請求項３の発明では、携帯機器用スピーカの振動板を製造する製造装置として、固定型に樹脂材料通路を設け、この樹脂材料通路における振動部成形用キャビティとの連通部を、振動部の弾性部が接合する面に対応する箇所に位置付けるようにした。 According to a third aspect of the present invention, as a manufacturing apparatus for manufacturing a diaphragm for a portable device speaker, a resin material passage is provided in a fixed mold, and a communicating portion with a vibration portion molding cavity in the resin material passage is provided as an elastic portion of the vibration portion. The part is positioned at a location corresponding to the surface to be joined.

具体的には、画面を覆う板状に形成され、振動源により加振される振動部と、該振動部の外周部と間隔をあけて設けられ、携帯機器のケースに保持される保持部と、上記振動部と保持部との間に設けられてこれら振動部及び保持部に接合し、該振動部を保持部に対し弾性支持する弾性部とを備えた携帯機器用スピーカの振動板を製造する製造装置を対象とする。 Specifically, a vibration part that is formed in a plate shape that covers the screen and is vibrated by a vibration source, and a holding part that is provided at a distance from the outer peripheral part of the vibration part and is held by the case of the mobile device, And manufacturing a diaphragm for a speaker for a portable device provided with an elastic portion provided between the vibrating portion and the holding portion, joined to the vibrating portion and the holding portion, and elastically supporting the vibrating portion with respect to the holding portion. Targeting manufacturing equipment.

そして、上記振動部と保持部とを備えた一次成形品の表側及び裏側の一方を成形する第１成形面を有する可動型と、上記一次成形品の表側及び裏側の他方を成形する第２成形面及び上記弾性部を成形する第３成形面を有する固定型と、上記可動型の位置を、該可動型の第１成形面と上記固定型の第２成形面とが対向する第１位置と、該可動型の第１成形面と上記固定型の第３成形面とが対向する第２位置とに切り替える可動型移動手段と、上記固定型に設けられ、上記可動型が第１位置にあるときに該可動型と固定型とが型閉じされて形成される振動部成形用キャビティ及び保持部成形用キャビティに連通する樹脂材料通路と、上記固定型に設けられ、上記可動型が第２位置にあるときに該可動型と固定型とが型閉じされて形成される弾性部成形用キャビティに連通する弾性材料通路と、上記樹脂材料通路の上流端に接続される樹脂材料射出手段と、上記弾性材料通路の上流端に接続される弾性材料射出手段とを備え、上記樹脂材料通路における振動部成形用キャビティとの連通部は、上記振動部の弾性部が接合する面に対応する箇所に位置付けられている構成とする。 Then, a movable mold having a first molding surface for molding one of the front side and the back side of the primary molded product provided with the vibrating part and the holding part, and a second molding for molding the other of the front side and the back side of the primary molded product. A fixed mold having a surface and a third molding surface for molding the elastic portion, and a position of the movable mold, a first position where the first molding surface of the movable mold and the second molding surface of the fixed mold face each other. A movable mold moving means for switching to a second position where the first molding surface of the movable mold and the third molding surface of the fixed mold are opposed to each other, and the movable mold is in the first position. Sometimes the movable mold and the stationary mold are closed to form a vibration part molding cavity and a resin material passage communicating with the holding section molding cavity, the fixed mold is provided, and the movable mold is in the second position. The elastic part formed by closing the movable mold and the fixed mold when the An elastic material passage communicating with the shaping cavity, a resin material injection means connected to the upstream end of the resin material passage, and an elastic material injection means connected to the upstream end of the elastic material passage, the resin material The communicating part of the passage with the vibrating part forming cavity is positioned at a location corresponding to the surface to which the elastic part of the vibrating part is joined.

この構成によれば、可動型移動手段により可動型を第１位置にして該可動型と固定型とを型閉じすると、振動部成形用キャビティ及び保持部成形用キャビティが形成される。樹脂材料射出手段から射出された樹脂材料は、樹脂材料通路を通って振動部成形用キャビティ及び保持部成形用キャビティに流入する。このとき、振動部成形用キャビティに流入する樹脂材料は、振動部の弾性部が接合する面に対応する箇所から流入することになる。これらキャビティに流入した樹脂材料が固化した後に、可動型と固定型とを型開きすると、樹脂材料通路の振動部成形用キャビティ近傍の樹脂材料が振動部から分離するとともに、樹脂材料通路の保持部成形用キャビティ近傍の樹脂材料が保持部から分離する。このとき、振動部成形用キャビティには、樹脂材料を振動部の弾性部が接合する面に対応する箇所から流入させているので、振動部には、弾性部が接合する面に樹脂材料通路の跡が残る。その後、可動型移動手段により可動型を第２位置にして型閉じすると、弾性部成形用キャビティが形成される。このキャビティには、弾性材料射出手段から射出された弾性材料が弾性材料通路を通って流入する。弾性部成形用キャビティに弾性材料が流入すると、該弾性材料は、振動部の弾性部が接合する面を覆うように広がって成形されて弾性部となる。従って、請求項２の発明と同様に、振動部の樹脂材料通路の跡が弾性部により覆われて振動部の外観に現れなくなる。 According to this configuration, when the movable mold is moved to the first position by the movable mold moving means and the movable mold and the fixed mold are closed, the vibration part forming cavity and the holding part forming cavity are formed. The resin material injected from the resin material injection means flows into the vibration part molding cavity and the holding part molding cavity through the resin material passage. At this time, the resin material flowing into the vibration part forming cavity flows in from a position corresponding to a surface to which the elastic part of the vibration part is joined. When the movable mold and the fixed mold are opened after the resin material flowing into these cavities is solidified, the resin material in the vicinity of the vibration portion molding cavity of the resin material passage is separated from the vibration portion, and the holding portion of the resin material passage The resin material in the vicinity of the molding cavity is separated from the holding portion. At this time, since the resin material is caused to flow into the vibration part molding cavity from a position corresponding to the surface to which the elastic part of the vibration part is joined, the vibration part has a resin material passage on the surface to which the elastic part is joined. Traces remain. Thereafter, when the movable mold is moved to the second position by the movable mold moving means and the mold is closed, an elastic portion forming cavity is formed. The elastic material injected from the elastic material injection means flows into the cavity through the elastic material passage. When the elastic material flows into the elastic part molding cavity, the elastic material is spread and molded so as to cover the surface to which the elastic part of the vibration part is joined to become an elastic part. Therefore, similarly to the invention of claim 2, the trace of the resin material passage of the vibration part is covered with the elastic part and does not appear on the appearance of the vibration part.

請求項１の発明によれば、振動部に弾性部が接合する接合面を設け、この接合面に、振動部を成形型で成形する際に形成された樹脂材料通路の跡を残すようにしたので、該樹脂材料通路の跡を弾性部により覆って隠すことができる。これにより、樹脂材料通路の跡を除去することなく、見栄えの良好な振動板を得ることができて、振動板の製造工数を削減することができる。 According to the first aspect of the present invention, the vibration portion is provided with a joining surface to which the elastic portion is joined, and a trace of the resin material passage formed when the vibrating portion is molded with the molding die is left on the joining surface. Therefore, the trace of the resin material passage can be covered and hidden by the elastic portion. Thereby, a good-looking diaphragm can be obtained without removing the trace of the resin material passage, and the number of manufacturing steps of the diaphragm can be reduced.

請求項２の発明によれば、可動型と固定型とを型閉じした後、樹脂材料を、振動部の弾性部が接合する面に対応する箇所から振動部成形用キャビティに流入させるようにしたので、振動部には、弾性部が接合する面に樹脂材料通路の跡を残すことができる。そして、この振動部に残った樹脂材料通路の跡を弾性部で覆って隠すことができるので、樹脂材料通路の跡を除去することなく、見栄えの良好な振動板を得ることができて、振動板の製造工数を削減することができる。 According to the invention of claim 2, after the movable die and the fixed die are closed, the resin material is caused to flow into the vibrating portion molding cavity from a position corresponding to the surface where the elastic portion of the vibrating portion is joined. Therefore, the vibration part can leave a trace of the resin material passage on the surface where the elastic part is joined. And since the trace of the resin material passage remaining in the vibration portion can be covered and hidden by the elastic portion, a good-looking diaphragm can be obtained without removing the trace of the resin material passage, and vibration can be obtained. It is possible to reduce the number of manufacturing steps of the plate.

請求項３の発明によれば、樹脂材料通路における振動部成形用キャビティとの連通部を、振動部の弾性部が接合する面に対応する箇所に位置付けたので、振動部の成形後、該振動部には、弾性部が接合する面に樹脂材料通路の跡を残すことができる。これにより、請求項２の発明による効果と同様に、樹脂材料通路の跡を除去することなく、見栄えの良好な振動板を得ることができて、振動板の製造工数を削減することができる。 According to the third aspect of the present invention, since the communicating part of the resin material passage with the vibration part molding cavity is located at a position corresponding to the surface to which the elastic part of the vibration part is joined, the vibration part is molded after the vibration part is molded. The part can leave a trace of the resin material passage on the surface where the elastic part is joined. Thus, similarly to the effect of the second aspect of the invention, a diaphragm having a good appearance can be obtained without removing the trace of the resin material passage, and the number of manufacturing steps of the diaphragm can be reduced.

以下、本発明の実施形態を図面に基づいて詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

図１及び図２は、本発明の実施形態に係る携帯機器用スピーカの振動板１である。図示しないが、携帯機器は携帯電話機である。上記振動板１は、携帯電話機の液晶画面上に重ねて設けられている。また、上記携帯電話機には、上記振動板１を振動させる振動源（図示せず）が設けられている。この振動源は、従来より携帯電話機等のスピーカの振動源として用いられている周知のものであり、電圧の印加により微少変形する性質を持つ圧電素子や、永久磁石及びボイスコイル等で構成することができる。 1 and 2 show a diaphragm 1 for a portable device speaker according to an embodiment of the present invention. Although not shown, the mobile device is a mobile phone. The diaphragm 1 is provided on the liquid crystal screen of the mobile phone. The mobile phone is provided with a vibration source (not shown) that vibrates the diaphragm 1. This vibration source is a well-known one that has been conventionally used as a vibration source for a speaker such as a mobile phone, and is composed of a piezoelectric element having a property of being slightly deformed by application of a voltage, a permanent magnet, a voice coil, and the like. Can do.

上記振動板１は、液晶画面の表示領域と略同じ大きさの矩形状に形成された振動部２と、該振動部２の外周部から外方へ所定距離離れて配置された保持部３と、上記振動部２と保持部３との間に設けられた弾性部４とを備えている。弾性部４は、振動部２及び保持部３に一体成形されている。振動板１が上記携帯電話機に取り付けられた状態で、該振動板１の液晶画面側が裏側とされ、その反対側である使用者に向く側が表側とされている。 The diaphragm 1 includes a vibrating portion 2 formed in a rectangular shape having a size substantially the same as a display area of a liquid crystal screen, and a holding portion 3 disposed at a predetermined distance outward from the outer peripheral portion of the vibrating portion 2. And an elastic portion 4 provided between the vibrating portion 2 and the holding portion 3. The elastic part 4 is integrally formed with the vibration part 2 and the holding part 3. In a state where the diaphragm 1 is attached to the mobile phone, the liquid crystal screen side of the diaphragm 1 is the back side, and the opposite side to the user is the front side.

上記振動部２は、透明な樹脂材料を上記液晶画面と略平行に延びる板状に成形してなるものである。図２に示すように、振動部２の外周部は、その表面側が全周に亘って切除された段差状をなしており、振動部２の表面から裏面へ向けて延びる振動部側第１縦面部２ａと、該振動部側第１縦面部２ａの裏面側端部から保持部３側へ向けて延びる振動部側平面部２ｂと、該振動部側平面部２ｂの保持部３側端部から振動部２の裏面まで延びる振動部側第２縦面部２ｃとで構成されている。従って、振動部２の外周部の肉厚は、該振動部２の中央部の肉厚よりも薄くなっている。 The vibration part 2 is formed by molding a transparent resin material into a plate shape extending substantially parallel to the liquid crystal screen. As shown in FIG. 2, the outer peripheral part of the vibration part 2 has a stepped shape with the surface side cut out over the entire circumference, and the vibration part side first vertical extending from the surface of the vibration part 2 toward the back surface. From the surface portion 2a, the vibration portion side plane portion 2b extending from the back surface side end portion of the vibration portion side first vertical surface portion 2a toward the holding portion 3 side, and the holding portion 3 side end portion of the vibration portion side plane portion 2b It is comprised with the vibration part side 2nd vertical surface part 2c extended to the back surface of the vibration part 2. FIG. Accordingly, the thickness of the outer peripheral portion of the vibrating portion 2 is thinner than the thickness of the central portion of the vibrating portion 2.

上記保持部３は、図１に示すように、上記振動部２と同じ樹脂材料を矩形枠状に成形してなるものである。保持部３の４つの角部は曲線で構成され、また、保持部３の４つの辺部は、振動部２の外周部と略平行に延びている。保持部３の内周部は、図２に示すように、上記振動部２の外周部と同様に表面側が切除された段差状をなしており、保持部３の表面から裏面へ向けて延びる保持部側第１縦面部３ａと、該保持部側第１縦面部３ａの裏面側端部から振動部２側へ向けて延びる保持部側平面部３ｂと、該保持部側平面部３ｂの振動部２側端部から保持部３の裏面まで延びる保持部側第２縦面部３ｃとで構成されている。従って、保持部３の内周部の肉厚は、該保持部３の外周部の肉厚よりも薄くなっている。上記保持部３の表面と振動部２の表面とは略同一面上に位置しており、また、保持部３の裏面と振動部２の裏面とも略同一面上に位置している。この保持部３が上記携帯電話機のケース（図示せず）に保持されるようになっている。 As shown in FIG. 1, the holding unit 3 is formed by molding the same resin material as the vibrating unit 2 into a rectangular frame shape. The four corners of the holding part 3 are configured by curves, and the four side parts of the holding part 3 extend substantially parallel to the outer peripheral part of the vibration part 2. As shown in FIG. 2, the inner peripheral portion of the holding portion 3 has a stepped shape in which the front surface side is cut out in the same manner as the outer peripheral portion of the vibrating portion 2, and the holding portion 3 extends from the front surface to the back surface. Part-side first vertical surface part 3a, holding part-side flat part 3b extending from the back side end part of the holding part-side first vertical surface part 3a toward the vibration part 2 side, and the vibration part of the holding part-side flat part 3b It is comprised with the holding | maintenance part side 2nd vertical surface part 3c extended from the 2 side edge part to the back surface of the holding | maintenance part 3. FIG. Therefore, the thickness of the inner peripheral portion of the holding portion 3 is thinner than the thickness of the outer peripheral portion of the holding portion 3. The surface of the holding part 3 and the surface of the vibration part 2 are located on substantially the same surface, and the back surface of the holding part 3 and the back surface of the vibration part 2 are located on substantially the same surface. The holding unit 3 is held by a case (not shown) of the mobile phone.

上記弾性部４は、例えば着色された合成ゴム等の弾性材料を成形してなるものである。この弾性部４は、振動部２の振動部側第１縦面部２ａ、振動部側平面部２ｂ及び振動部側第２縦面部２ｃに接合して溶着されているとともに、保持部３の保持部側第１縦面部３ａ、保持部側平面部３ｂ及び保持部側第２縦面部３ｃに接合して溶着されている。この弾性部４により、振動部２が保持部３に対し弾性支持され、振動部２の振動が許容されるようになっている。 The elastic part 4 is formed by molding an elastic material such as colored synthetic rubber. The elastic portion 4 is bonded and welded to the vibration portion side first vertical surface portion 2 a, the vibration portion side flat surface portion 2 b and the vibration portion side second vertical surface portion 2 c of the vibration portion 2, and the holding portion of the holding portion 3. The side first vertical surface portion 3a, the holding portion side flat surface portion 3b, and the holding portion side second vertical surface portion 3c are joined and welded. The elastic part 4 elastically supports the vibration part 2 with respect to the holding part 3 so that the vibration of the vibration part 2 is allowed.

上記振動部２の外周部及び保持部３の内周部は上記したように段差状をなしているので、振動部２と弾性部４との接合面積及び保持部３と弾性部４との接合面積は広く確保されている。従って、振動部２、保持部３及び弾性部４は強固に一体化している。上記弾性部４の表面と振動部２の表面とは略同一面上に位置しており、また、弾性部４の裏面と振動部２の裏面とも略同一面上に位置している。上記振動部側第１縦面部２ａ、振動部側平面部２ｂ及び振動部側第２縦面部２ｃが、振動部２の弾性部４に接合する接合面であり、また、保持部側第１縦面部３ａ、保持部側平面部３ｂ及び保持部側第２縦面部３ｃが、保持部３の弾性部４に接合する接合面である。 Since the outer peripheral part of the vibration part 2 and the inner peripheral part of the holding part 3 are stepped as described above, the joining area of the vibrating part 2 and the elastic part 4 and the joining of the holding part 3 and the elastic part 4 are as follows. The area is widely secured. Therefore, the vibration part 2, the holding part 3, and the elastic part 4 are firmly integrated. The surface of the elastic part 4 and the surface of the vibration part 2 are located on substantially the same surface, and the back surface of the elastic part 4 and the back surface of the vibration part 2 are located on substantially the same surface. The vibration part side first vertical surface part 2a, the vibration part side flat part 2b, and the vibration part side second vertical surface part 2c are joint surfaces that are joined to the elastic part 4 of the vibration part 2, and the holding part side first vertical surface part. The surface portion 3 a, the holding portion side plane portion 3 b, and the holding portion side second vertical surface portion 3 c are bonding surfaces that are bonded to the elastic portion 4 of the holding portion 3.

次に、上記のように構成された振動板１を製造する製造装置２０の構成について説明する。この製造装置２０は、図３に示すように、上記振動部２、保持部３及び弾性部４を成形する成形型２１と、透明の樹脂材料を射出する樹脂材料射出装置２２と、着色された弾性材料を射出する弾性材料射出装置２３とを備えている。 Next, the configuration of the manufacturing apparatus 20 that manufactures the diaphragm 1 configured as described above will be described. As shown in FIG. 3, the manufacturing apparatus 20 is colored with a molding die 21 for molding the vibration unit 2, the holding unit 3, and the elastic unit 4, and a resin material injection device 22 for injecting a transparent resin material. And an elastic material injection device 23 for injecting an elastic material.

成形型２１は、可動型２５と固定型２６とを備えており、上記振動部２及び保持部３を備えた一次成形品２７（図８に示す）を成形した後、該一次成形品２７に弾性部４を一体成形するように構成されている。可動型２５は、移動装置（図示せず）により水平方向に移動して固定型２６に対し接離するようになっている。可動型２５が固定型２６に接した状態（図７に示す）が型閉じ状態であり、この型閉じ状態で可動型２５と固定型２６とは図示しない型締め装置により型締めされるようになっている。また、可動型２５にはイジェクトピン等（図示せず）が設けられている。 The molding die 21 includes a movable die 25 and a fixed die 26, and after molding a primary molded product 27 (shown in FIG. 8) including the vibrating unit 2 and the holding unit 3, the primary molded product 27 is formed into the primary molded product 27. The elastic part 4 is configured to be integrally formed. The movable mold 25 is moved in the horizontal direction by a moving device (not shown) so as to be in contact with and separated from the fixed mold 26. A state in which the movable mold 25 is in contact with the fixed mold 26 (shown in FIG. 7) is a mold closed state. In this mold closed state, the movable mold 25 and the fixed mold 26 are clamped by a mold clamping device (not shown). It has become. The movable die 25 is provided with an eject pin or the like (not shown).

可動型２５の上半部には、一次成形品２７の裏側を成形する凹面状の上側第１成形面３０が形成されている。可動型２５の下半部には、上記上側第１成形面３０と同様の下側第１成形面３１が該上側第１成形面３０から下方に離れて形成されている。これら上側第１成形面３０及び下側第１成形面３１は、上記一次成形品２７を保持するように形成されている。 A concave upper first molding surface 30 for molding the back side of the primary molded product 27 is formed in the upper half of the movable mold 25. A lower first molding surface 31 similar to the upper first molding surface 30 is formed in the lower half of the movable mold 25 so as to be spaced downward from the upper first molding surface 30. The upper first molding surface 30 and the lower first molding surface 31 are formed to hold the primary molded product 27.

一方、固定型２６の上側には、図４にも示すように、一次成形品２７の表側を成形する上側第２成形面３２が形成されている。固定型２６の下側には、上記上側第２成形面３２と同様の下側第２成形面３３が該上側第２成形面３２から下方に離れて形成されている。固定型２６の上側第２成形面３２と下側第２成形面３３との間には、上記弾性部４を成形するための第３成形面３４が設けられている。上側第２成形面３２と第３成形面３４との離間距離は、上記上側第１成形面３０と下側第１成形面３１との離間距離と略同じに設定されている。また、第３成形面３４と下側第２成形面３３との離間距離も、上記上側第１成形面３０と下側第１成形面３１との離間距離と略同じに設定されている。 On the other hand, an upper second molding surface 32 for molding the front side of the primary molded product 27 is formed on the upper side of the fixed die 26 as shown in FIG. A lower second molding surface 33 similar to the upper second molding surface 32 is formed on the lower side of the fixed die 26 so as to be spaced downward from the upper second molding surface 32. A third molding surface 34 for molding the elastic portion 4 is provided between the upper second molding surface 32 and the lower second molding surface 33 of the fixed mold 26. The distance between the upper second molding surface 32 and the third molding surface 34 is set to be substantially the same as the distance between the upper first molding surface 30 and the lower first molding surface 31. Further, the separation distance between the third molding surface 34 and the lower second molding surface 33 is also set to be substantially the same as the separation distance between the upper first molding surface 30 and the lower first molding surface 31.

上記上側第２成形面３２及び下側第２成形面３３は、平坦面３２ａ、３３ａと、振動部２の外周部及び保持部３の内周部を成形する環状の突条部３２ｂ、３３ｂとで構成されている。また、上記第３成形面３４は、平坦面で構成されている。 The upper second molding surface 32 and the lower second molding surface 33 are flat surfaces 32a and 33a, and annular ridge portions 32b and 33b that mold the outer peripheral portion of the vibration portion 2 and the inner peripheral portion of the holding portion 3, respectively. It consists of The third molding surface 34 is a flat surface.

上記可動型２５は、可動型移動手段としてのスライド装置３６により、上下方向に移動するようになっている。該スライド装置３６は、流体圧で作動する流体圧シリンダで構成されている。このスライド装置３６により、可動型２５は、図７に示す上昇端の第１位置と、図９に示す下降端の第２位置とに切り替えられる。可動型２５が第１位置にあるときには、図３及び図７に示すように、上側第１成形面３０が上側第２成形面３２と対向するとともに、下側第１成形面３１が第３成形面３４と対向する。一方、可動型２５が第２位置にあるときには、図９に示すように、上側第１成形面３０が第３成形面３４と対向するとともに、下側第１成形面３１が下側第２成形面３３と対向する。 The movable mold 25 is moved in the vertical direction by a slide device 36 as a movable moving means. The slide device 36 is composed of a fluid pressure cylinder that operates with fluid pressure. By this slide device 36, the movable mold 25 is switched between the first position of the rising end shown in FIG. 7 and the second position of the lowering end shown in FIG. When the movable mold 25 is in the first position, as shown in FIGS. 3 and 7, the upper first molding surface 30 faces the upper second molding surface 32, and the lower first molding surface 31 is the third molding. Opposite the surface 34. On the other hand, when the movable mold 25 is in the second position, as shown in FIG. 9, the upper first molding surface 30 faces the third molding surface 34 and the lower first molding surface 31 is the lower second molding. Opposite the surface 33.

図７に示すように、可動型２５を第１位置として該可動型２５と固定型２６とを型閉じすると、上側第１成形面３０及び上側第２成形面３２により、振動部成形用キャビティ４０及び保持部成形用キャビティ４１が形成される。さらに、このとき、下側第１成形面３１に一次成形品２７が保持されている場合には、第３成形面３４により弾性部成形用キャビティ（図示せず）が形成される。 As shown in FIG. 7, when the movable mold 25 and the fixed mold 26 are closed with the movable mold 25 as the first position, the upper part first molding surface 30 and the upper second molding surface 32 cause the vibration part molding cavity 40. And the holding part forming cavity 41 is formed. Further, at this time, when the primary molded product 27 is held on the lower first molding surface 31, an elastic portion molding cavity (not shown) is formed by the third molding surface 34.

一方、図９に示すように、可動型２５を第２位置として型閉じすると、下側第１成形面３１及び下側第２成形面３３により、振動部成形用キャビティ４０及び保持部成形用キャビティ４１が形成される。さらに、このとき、上側第１成形面３０に一次成形品２７が保持されている場合には、第３成形面３４により弾性部成形用キャビティ４４が形成される。 On the other hand, as shown in FIG. 9, when the movable mold 25 is closed at the second position, the vibrating portion molding cavity 40 and the holding portion molding cavity are formed by the lower first molding surface 31 and the lower second molding surface 33. 41 is formed. Further, at this time, when the primary molded product 27 is held on the upper first molding surface 30, an elastic portion molding cavity 44 is formed by the third molding surface 34.

固定型２６には、上記樹脂材料射出装置２２が接続される上流側樹脂材料通路４５が形成されている。さらに、この固定型２６には、可動型２５が第１位置にあるときに型閉じされて形成される振動部成形用キャビティ４０及び保持部成形用キャビティ４１に樹脂材料を流入させる上側樹脂材料通路４６と、可動型２５が第２位置にあるときに型閉じされて形成される振動部成形用キャビティ４０及び保持部成形用キャビティ４１に樹脂材料を流入させる下側樹脂材料通路４７とが形成されている。 An upstream resin material passage 45 to which the resin material injection device 22 is connected is formed in the fixed mold 26. Further, in the fixed mold 26, an upper resin material passage through which resin material flows into the vibration part molding cavity 40 and the holding part molding cavity 41 formed by closing the movable mold 25 when it is in the first position. 46 and a lower resin material passage 47 that allows the resin material to flow into the vibration part molding cavity 40 and the holding part molding cavity 41 formed by closing the mold when the movable mold 25 is in the second position. ing.

上側樹脂材料通路４６は下流側は、第１通路４６ａと第２通路４６ｂとに分岐している。図５（ａ）に示すように、第１通路４６ａの下流端は、突条部３２ｂにおける保持部側平面部３ｂを成形する部分に開口している。第２通路４６ｂの下流端は、突条部３２ｂにおける振動部側平面部２ｂを成形する部分に開口している。つまり、上側樹脂材料通路４６の下流端は、振動部成形用キャビティ４０及び保持部成形用キャビティ４１との連通部であり、図５（ｂ）に示すように、樹脂材料は、第１通路４６ａにより、保持部３の弾性部４が接合する面に対応する箇所から上記保持部成形用キャビティ４１に流入する。また、樹脂材料は、第２通路４６ｂにより、振動部２の弾性部４が接合する面に対応する箇所から上記振動部成形用キャビティ４０に流入する。 The upper resin material passage 46 is branched downstream into a first passage 46a and a second passage 46b. As shown in FIG. 5 (a), the downstream end of the first passage 46a opens to a portion of the protrusion 32b where the holding portion side flat portion 3b is formed. The downstream end of the 2nd channel | path 46b is opening to the part which shape | molds the vibration part side plane part 2b in the protrusion part 32b. That is, the downstream end of the upper resin material passage 46 is a communication portion between the vibration part molding cavity 40 and the holding part molding cavity 41, and as shown in FIG. 5B, the resin material is the first passage 46a. By this, it flows into the holding part molding cavity 41 from a location corresponding to the surface to which the elastic part 4 of the holding part 3 is joined. In addition, the resin material flows into the vibration part molding cavity 40 from a position corresponding to a surface to which the elastic part 4 of the vibration part 2 is joined by the second passage 46b.

下側樹脂材料通路４７も上記上側樹脂材料通路４６と同様に第１通路４７ａと第２通路４７ｂとに分岐している。第１通路４７ａの下流端は、突条部３２ｂにおける保持部側平面部３ｂを成形する部分に開口している。第２通路４６ｂの下流端は、突条部３２ｂにおける振動部側平面部２ｂを成形する部分に開口している。つまり、下側樹脂材料通路４７の下流端は、振動部成形用キャビティ４０及び保持部成形用キャビティ４１との連通部であり、樹脂材料は、第１通路４７ａにより、保持部３の弾性部４が接合する面に対応する箇所から上記保持部成形用キャビティ４１に流入する。また、樹脂材料は、第２通路４７ｂにより、振動部２の弾性部４が接合する面に対応する箇所から上記振動部成形用キャビティ４０に流入する。 Similarly to the upper resin material passage 46, the lower resin material passage 47 also branches into a first passage 47a and a second passage 47b. The downstream end of the 1st channel | path 47a is opened to the part which shape | molds the holding | maintenance part side plane part 3b in the protrusion part 32b. The downstream end of the 2nd channel | path 46b is opening to the part which shape | molds the vibration part side plane part 2b in the protrusion part 32b. That is, the downstream end of the lower resin material passage 47 is a communication portion between the vibration part molding cavity 40 and the holding part molding cavity 41, and the resin material is sent to the elastic part 4 of the holding part 3 by the first passage 47 a. Flows into the holding portion molding cavity 41 from a location corresponding to the surfaces to be joined. In addition, the resin material flows into the vibration part molding cavity 40 from a position corresponding to a surface to which the elastic part 4 of the vibration part 2 is joined by the second passage 47b.

また、固定型２６には、上流側樹脂材料通路４５を上側樹脂材料通路４６及び下側樹脂材料通路４７の一方に連通させる通路切替装置５０が設けられている。通路切替装置５０は、上下方向に延び上端が開口するシリンダ５１と、該シリンダ５１に挿入されたピストン５２と、該ピストン５２をシリンダ５１の中心線方向に移動させるピストン駆動装置５３とを備えている。上記シリンダ５１の内面には、上記上流側樹脂材料通路４５の下流端が開口している。さらに、このシリンダ５１の内面には、上記上流側樹脂材料通路４５の開口と反対側に、上記上側樹脂材料通路４６の上流端と上記下側樹脂材料通路４７の上流端とが開口している。上側樹脂材料通路４６の上流端は、上記下側樹脂材料通路４７の上流端の上方に位置している。 The fixed mold 26 is provided with a passage switching device 50 that allows the upstream resin material passage 45 to communicate with one of the upper resin material passage 46 and the lower resin material passage 47. The passage switching device 50 includes a cylinder 51 extending in the vertical direction and having an upper end opened, a piston 52 inserted into the cylinder 51, and a piston drive device 53 that moves the piston 52 in the direction of the center line of the cylinder 51. Yes. A downstream end of the upstream resin material passage 45 is opened on the inner surface of the cylinder 51. Further, on the inner surface of the cylinder 51, an upstream end of the upper resin material passage 46 and an upstream end of the lower resin material passage 47 are opened on the side opposite to the opening of the upstream resin material passage 45. . The upstream end of the upper resin material passage 46 is located above the upstream end of the lower resin material passage 47.

上記ピストン５２の上半部には上側通路５４が形成され、下半部には下側通路５５が形成されている。ピストン駆動装置５３は、流体圧で作動する流体圧シリンダで構成されている。このピストン駆動装置５３は、ピストン５２の位置を、上側通路５４が上側樹脂材料通路４６と上流側樹脂材料通路４５とに連通する下降端位置（図３に示す）と、下側通路５５が下側樹脂材料通路４７と上流側樹脂材料通路４５とに連通する上昇端位置（図９に示す）とに切り替えるように構成されている。ピストン５２の位置が下降端位置とされているときには、下側通路５５が下側樹脂材料通路４７と上流側樹脂材料通路４５とに連通しないようになっており、また、上昇端位置とされているときには、上側通路５４が上側樹脂材料通路４６と上流側樹脂材料通路４５とに連通しないようになっている。 An upper passage 54 is formed in the upper half of the piston 52, and a lower passage 55 is formed in the lower half. The piston driving device 53 is composed of a fluid pressure cylinder that operates with fluid pressure. In the piston drive device 53, the piston 52 is positioned such that the upper passage 54 communicates with the upper resin material passage 46 and the upstream resin material passage 45, as shown in FIG. The side resin material passage 47 and the upstream resin material passage 45 are configured to be switched to a rising end position (shown in FIG. 9) communicating with the side resin material passage 47. When the position of the piston 52 is the lower end position, the lower passage 55 is not communicated with the lower resin material passage 47 and the upstream resin material passage 45, and is also the upper end position. The upper passage 54 does not communicate with the upper resin material passage 46 and the upstream resin material passage 45 when the upper passage 54 is in the open position.

また、固定型２６には、上記弾性材料射出装置２３が接続される弾性材料通路５６が形成されている。この弾性材料通路５６は、弾性材料を弾性部成形用キャビティ４４に流入させるためのものである。弾性材料通路５６は、上記シリンダ５１の外側を廻るように延びている。弾性材料通路５９の下流端は、第３成形面３４の弾性部成形用キャビティ４４に対応する箇所に開口している。 The fixed mold 26 is formed with an elastic material passage 56 to which the elastic material injection device 23 is connected. The elastic material passage 56 is for allowing the elastic material to flow into the elastic portion forming cavity 44. The elastic material passage 56 extends around the outside of the cylinder 51. The downstream end of the elastic material passage 59 is opened at a location corresponding to the elastic part forming cavity 44 of the third forming surface 34.

上記樹脂材料射出装置２２及び弾性材料射出装置２３は、従来よりこの種の製造装置２０に用いられている周知の射出成形機である。すなわち、これら樹脂材料射出装置２２及び弾性材料射出装置２３は、材料を混練するためのシリンダ及びスクリュ（図示せず）と、シリンダ内の流動状態の材料を射出するノズル２２ａ、２３ａとを備えている。 The resin material injection device 22 and the elastic material injection device 23 are well-known injection molding machines conventionally used in this type of manufacturing apparatus 20. That is, the resin material injection device 22 and the elastic material injection device 23 include a cylinder and a screw (not shown) for kneading the material, and nozzles 22a and 23a for injecting the fluid material in the cylinder. Yes.

次に、上記のように構成された製造装置２０を用いて振動板１を製造する要領について説明する。まず、図７に示すように、可動型２５の位置をスライド装置３６により第１位置にして該可動型２５と固定型２６とを型閉じする。これにより、成形型２１には、振動部成形用キャビティ４０及び保持部成形用キャビティ４１が形成される。さらに、ピストン５２の位置をピストン駆動装置５３により下降端位置にして、上流側樹脂材料通路４５と上側樹脂材料通路４６とを上側通路５４により連通させておく。 Next, the point which manufactures the diaphragm 1 using the manufacturing apparatus 20 comprised as mentioned above is demonstrated. First, as shown in FIG. 7, the position of the movable mold 25 is set to the first position by the slide device 36, and the movable mold 25 and the fixed mold 26 are closed. As a result, a vibration part molding cavity 40 and a holding part molding cavity 41 are formed in the molding die 21. Further, the position of the piston 52 is set to the lower end position by the piston driving device 53, and the upstream resin material passage 45 and the upper resin material passage 46 are communicated by the upper passage 54.

そして、樹脂材料射出装置２２により流動状態の樹脂材料を射出する。樹脂材料射出装置２２のノズル２２ａから射出された樹脂材料は、上流側樹脂材料通路４５、上側通路５４及び上側樹脂材料通路４６を順に通る。そして、樹脂材料は、上側樹脂材料通路４６の第１通路４６ａから保持部成形用キャビティ４１に流入し、この保持部成型用キャビティ４１に流入した樹脂材料は、該保持部成形用キャビティ４１内に行き渡る。また、樹脂材料は、第２通路４６ｂから振動部成形用キャビティ４０に流入し、この振動部成形用キャビティ４０に流入した樹脂材料は、該振動部成形用キャビティ４０内に行き渡る。 Then, a resin material in a fluid state is injected by the resin material injection device 22. The resin material injected from the nozzle 22a of the resin material injection device 22 passes through the upstream resin material passage 45, the upper passage 54, and the upper resin material passage 46 in this order. The resin material flows into the holding portion molding cavity 41 from the first passage 46 a of the upper resin material passage 46, and the resin material that has flowed into the holding portion molding cavity 41 enters the holding portion molding cavity 41. Go around. Further, the resin material flows into the vibration part molding cavity 40 from the second passage 46 b, and the resin material that has flowed into the vibration part molding cavity 40 spreads into the vibration part molding cavity 40.

上記振動部成形用キャビティ４０及び保持部成形用キャビティ４１内で樹脂材料が固化すると、図８に示すように、一次成形品２７となる。このとき、図５（ｂ）に示すように、第１通路４６ａの保持部成形用キャビティ４１近傍で該第１通路４６ａ内の樹脂材料が固化するとともに、第２通路４６ｂの振動部成形用キャビティ４０近傍で該第２通路４６ｂ内の樹脂材料が固化する。また、上記一次成形品２７は、上側第１成形面３０に保持される。 When the resin material is solidified in the vibration part molding cavity 40 and the holding part molding cavity 41, a primary molded product 27 is obtained as shown in FIG. At this time, as shown in FIG. 5B, the resin material in the first passage 46a solidifies in the vicinity of the holding portion molding cavity 41 of the first passage 46a, and the vibration portion molding cavity of the second passage 46b. In the vicinity of 40, the resin material in the second passage 46b is solidified. The primary molded product 27 is held on the upper first molding surface 30.

次いで、可動型２５及び固定型２６を型開きする。この型開きにより、図６（ａ）に示すように、第１通路４６ａ及び第２通路４６ｂ内で固化した樹脂材料が保持部３の保持部側平面部３ｂ及び振動部２の振動部側平面部２ｂから分離する。このことで、保持部側平面部３ｂ及び振動部側平面部２ｂには樹脂材料通路の跡Ｗが残る。 Next, the movable mold 25 and the fixed mold 26 are opened. 6A, the resin material solidified in the first passage 46a and the second passage 46b causes the holding portion side plane portion 3b of the holding portion 3 and the vibration portion side plane of the vibration portion 2 to be solidified. Separated from part 2b. As a result, a trace W of the resin material passage remains on the holding portion side flat portion 3b and the vibration portion side flat portion 2b.

その後、図９に示すように、可動型２５の位置をスライド装置３６により第２位置にして該可動型２５と固定型２６とを型閉じする。これにより、第３成形面３４と一次成形品２７との間に弾性部成形用キャビティ４４が形成されるとともに、該弾性部成形用キャビティ４４の下方に振動部成形用キャビティ４０及び保持部成形用キャビティ４１が形成される。さらに、ピストン５２の位置をピストン駆動装置５３により上昇端位置にして、上流側樹脂材料通路４５と下側樹脂材料通路４７とを下側通路５５により連通させておく。 Thereafter, as shown in FIG. 9, the movable die 25 is moved to the second position by the slide device 36, and the movable die 25 and the fixed die 26 are closed. As a result, an elastic portion molding cavity 44 is formed between the third molding surface 34 and the primary molded product 27, and the vibration portion molding cavity 40 and the holding portion molding are formed below the elastic portion molding cavity 44. A cavity 41 is formed. Further, the position of the piston 52 is set to the rising end position by the piston driving device 53, and the upstream resin material passage 45 and the lower resin material passage 47 are communicated with each other by the lower passage 55.

そして、弾性材料射出装置２３により流動状態の弾性材料を射出するとともに、樹脂材料射出装置２２により流動状態の樹脂材料を射出する。弾性材料射出装置２３のノズル２３ａから射出された弾性材料は、弾性材料通路５６を通って弾性部成形用キャビティ４４に流入し、該弾性部成形用キャビティ４４内に行き渡る。これにより、振動部２の振動部側第１縦面部２ａ、振動部側平面部２ｂ及び振動部側第２縦面部２ｃが弾性材料により覆われるとともに、保持部３の保持部側第１縦面部３ａ、保持部平面部３ｂ及び保持部側第２縦面部３ｃが覆われる。そして、この弾性材料は、図６（ｂ）及び図１０に示すように、固化する過程で一次成形品２７に溶着して一体化する。 The elastic material injection device 23 injects a fluid state elastic material, and the resin material injection device 22 injects a fluid state resin material. The elastic material injected from the nozzle 23 a of the elastic material injection device 23 flows into the elastic part forming cavity 44 through the elastic material passage 56 and spreads into the elastic part forming cavity 44. Thereby, the vibration part side first vertical surface part 2a, the vibration part side flat surface part 2b and the vibration part side second vertical surface part 2c of the vibration part 2 are covered with the elastic material, and the holding part side first vertical surface part of the holding part 3 is covered. 3a, the holding | maintenance part plane part 3b, and the holding | maintenance part side 2nd vertical surface part 3c are covered. Then, as shown in FIGS. 6B and 10, this elastic material is welded and integrated with the primary molded product 27 in the process of solidifying.

一方、樹脂材料射出装置２２のノズル２２ａから射出された樹脂材料は、上流側樹脂材料通路４５、下側通路５５及び下側樹脂材料通路４７を順に通る。そして、樹脂材料は、下側樹脂材料通路４７の第１通路４７ａから保持部成形用キャビティ４１に流入し、この保持部成型用キャビティ４１に流入した樹脂材料は、該保持部成形用キャビティ４１内に行き渡る。また、樹脂材料は、第２通路４７ｂから振動部成形用キャビティ４０に流入し、この振動部成形用キャビティ４０に流入した樹脂材料は、該振動部成形用キャビティ４０内に行き渡る。この樹脂材料が固化すると一次成形品２７となり、下側第１成形面３１に保持される。 On the other hand, the resin material injected from the nozzle 22a of the resin material injection device 22 sequentially passes through the upstream resin material passage 45, the lower passage 55, and the lower resin material passage 47. The resin material flows into the holding portion molding cavity 41 from the first passage 47 a of the lower resin material passage 47, and the resin material that has flowed into the holding portion molding cavity 41 flows into the holding portion molding cavity 41. Go around. Further, the resin material flows into the vibration part molding cavity 40 from the second passage 47 b, and the resin material that has flowed into the vibration part molding cavity 40 spreads into the vibration part molding cavity 40. When this resin material is solidified, it becomes a primary molded product 27 and is held on the lower first molding surface 31.

このように、弾性材料射出装置２３及び樹脂材料射出装置２２から弾性材料及び樹脂材料をそれぞれ射出することで、可動型２５の上側と下側とで弾性部４の成形と一次成形品２７の成形とを同時に行うことが可能になる。尚、弾性材料の射出を開始するタイミングと樹脂材料の射出を開始するタイミングとは一致していなくてもよく、弾性材料の射出を開始するタイミングを樹脂材料の射出を開始するタイミングよりも早くしてもよいし、遅くしてもよい。 In this way, by injecting the elastic material and the resin material from the elastic material injection device 23 and the resin material injection device 22, respectively, the elastic portion 4 and the primary molded product 27 are formed on the upper side and the lower side of the movable mold 25. Can be performed simultaneously. The timing for starting the injection of the elastic material and the timing for starting the injection of the resin material may not coincide with each other, and the timing for starting the injection of the elastic material is made earlier than the timing for starting the injection of the resin material. May be slow or slow.

しかる後、図１１に示すように、可動型２５と固定型２６とを型開きし、上側第１成形面３０に保持されている振動板１をイジェクトピンにより脱型する。そして、スライド装置３６により可動型２５の位置を第１位置にする。その後、可動型２５と固定型２６とを型閉じする。これにより、図示しないが、第３成形面３４と一次成形品２７との間に弾性部成形用キャビティ４４が形成されるとともに、その弾性部成形用キャビティ４４の上側に振動部成形用キャビティ４０及び保持部成形用キャビティ４１が形成される。さらに、ピストン５２の位置をピストン駆動装置５３により上昇端位置にする。この状態で、弾性材料射出装置２３から弾性材料を射出するとともに、樹脂材料射出装置２２から樹脂材料を射出することで、図１２に示すように、弾性部４が成形されるとともに、一次成形品２７が成形される。 Thereafter, as shown in FIG. 11, the movable mold 25 and the fixed mold 26 are opened, and the diaphragm 1 held on the upper first molding surface 30 is removed by an eject pin. Then, the position of the movable mold 25 is set to the first position by the slide device 36. Thereafter, the movable mold 25 and the fixed mold 26 are closed. Thus, although not shown, an elastic portion forming cavity 44 is formed between the third forming surface 34 and the primary molded product 27, and the vibration portion forming cavity 40 and the elastic portion forming cavity 44 are formed above the elastic portion forming cavity 44. A holding part forming cavity 41 is formed. Further, the position of the piston 52 is set to the rising end position by the piston driving device 53. In this state, an elastic material is injected from the elastic material injection device 23, and a resin material is injected from the resin material injection device 22, whereby the elastic portion 4 is molded and a primary molded product as shown in FIG. 27 is formed.

以上説明したように、この実施形態によれば、可動型２５を第１位置にして該可動型２５と固定型２６とを型閉じして形成した振動部成形用キャビティ４０に樹脂材料を流入させる際、振動部２の弾性部４が接合する面である振動部側平面部２ｂに対応する箇所から流入させるようにしたので、樹脂材料が固化した後に、可動型２５と固定型２６とを型開きすると、振動部２には、振動部側平面部２ｂに第２通路４６ｂの跡Ｗを形成することができる。そして、可動型２５を第２位置にして該可動型２５と固定型２６とを型閉じして形成した弾性部成形用キャビティ４４に弾性材料を射出することで、弾性材料が振動部側平面部２ｂを覆うように広がって成形されて弾性部４となる。従って、上記振動部２に残った第２通路４６ｂの跡Ｗは弾性部４により覆われて隠れることになる。これにより、第２通路４６ｂの跡Ｗを除去することなく、見栄えの良好な振動板１を得ることができて、振動板１の製造工数を削減することができる。 As described above, according to this embodiment, the resin material is caused to flow into the vibration part molding cavity 40 formed by closing the movable mold 25 and the fixed mold 26 with the movable mold 25 in the first position. At this time, since the elastic part 4 of the vibration part 2 is allowed to flow from a position corresponding to the vibration part side plane part 2b, which is a surface to which the elastic part 4 is joined, the movable mold 25 and the fixed mold 26 are formed after the resin material is solidified. When opened, traces W of the second passages 46b can be formed in the vibration part 2 on the vibration part side plane part 2b. Then, the elastic material is injected into the elastic portion molding cavity 44 formed by closing the movable die 25 and the fixed die 26 with the movable die 25 in the second position, so that the elastic material becomes the vibration portion side plane portion. The elastic part 4 is formed by spreading so as to cover 2b. Accordingly, the trace W of the second passage 46b remaining in the vibrating portion 2 is covered and hidden by the elastic portion 4. Thereby, it is possible to obtain the diaphragm 1 having a good appearance without removing the trace W of the second passage 46b, and to reduce the number of manufacturing steps of the diaphragm 1.

また、保持部３には、弾性部４が接合する面である保持部側平面部３ｂに第１通路４６ａの跡Ｗが残る。この保持部３の跡Ｗも上記した振動部２に残った跡Ｗと同様に弾性部４により覆われて隠れることになる。 Further, in the holding portion 3, a trace W of the first passage 46a remains on the holding portion side plane portion 3b that is a surface to which the elastic portion 4 is joined. The trace W of the holding part 3 is also covered and hidden by the elastic part 4 in the same manner as the trace W remaining on the vibration part 2 described above.

尚、この実施形態では、上側樹脂材料通路４６の下流側を第１通路４６ａと第２通路４６ｂとに分割しているが、例えば図１３及び図１４に示す変形例のように、上側樹脂材料通路４６の下流端から保持部成形用キャビティ４１まで延びる連通路７０を設けてもよい。この変形例では、上側樹脂材料通路４６の下流端が、突条部３２ｂにおける振動部側平面部２ｂを成形する箇所に開口している。連通路７０は略Ｖ字状をなしており、上側樹脂材料通路４６の下流端から突条部３２ｂの基部側へ向かって斜めに延びた後、突条部３２ｂにおける保持部側平面部３ｂを成形する箇所まで延びている。この連通路７０の下流端は、突条部３２ｂにおける振動部側平面部２ｂを成形する部分に開口している。また、下側樹脂材料通路４７にも同様な連通路を設けてもよい。 In this embodiment, the downstream side of the upper resin material passage 46 is divided into a first passage 46a and a second passage 46b. However, as in the modification shown in FIGS. 13 and 14, for example, the upper resin material passage 46 is divided. A communication passage 70 extending from the downstream end of the passage 46 to the holding portion molding cavity 41 may be provided. In this modification, the downstream end of the upper resin material passage 46 is opened at a location where the vibrating portion side flat portion 2b of the ridge portion 32b is formed. The communication passage 70 is substantially V-shaped and extends obliquely from the downstream end of the upper resin material passage 46 toward the base side of the ridge portion 32b, and then the holding portion side plane portion 3b of the ridge portion 32b is formed. It extends to the part to be molded. The downstream end of the communication path 70 is open to a portion where the vibrating portion side flat portion 2b of the ridge portion 32b is formed. Further, a similar communication path may be provided in the lower resin material path 47.

この変形例では、上側樹脂材料通路４６の樹脂材料が振動部成形用キャビティ４０に流入するとともに、連通路７０を介して保持部成形用キャビティ４１に流入する。この連通路７０内の樹脂材料が固化した状態で可動型２５と固定型２６とを型開きすると、図１４（ａ）に示すように、連通路７０内の樹脂材料が該連通路７０の中央の尖った部分で切れて樹脂材料通路、即ち連通路７０の跡Ｗとして残る。さらに、上側樹脂材料通路４６内で固化した樹脂材料も樹脂材料通路の跡Ｗとして残る。これら樹脂材料通路の跡Ｗは、振動部２の振動部側平面部２ｂ及び保持部３の保持部側平面部３ｂに残っているので、図１４（ｂ）に示すように、弾性部４により覆って隠すことができる。 In this modification, the resin material in the upper resin material passage 46 flows into the vibration part molding cavity 40 and also flows into the holding part molding cavity 41 through the communication path 70. When the movable mold 25 and the fixed mold 26 are opened while the resin material in the communication path 70 is solidified, the resin material in the communication path 70 is moved to the center of the communication path 70 as shown in FIG. The resin material passage, that is, the trace W of the communication passage 70 remains. Further, the resin material solidified in the upper resin material passage 46 also remains as a trace W of the resin material passage. Since the traces W of these resin material passages remain on the vibration part side flat part 2b of the vibration part 2 and the holding part side flat part 3b of the holding part 3, as shown in FIG. Cover and hide.

また、この実施形態では、可動型２５に上側第１成形面３０及び下側第１成形面３１を設け、固定型２６に上側第２成形面３２及び下側第２成形面３３を設けて一次成形品２７の成形と弾性部４の成形とを同時に行えるようにしているが、これに限らず、可動型２５の第１成形面及び固定型２６の第２成形面はそれぞれ１つであってもよい。こうすることで、固定型２６においては、上側樹脂材料通路４６と下側樹脂材料通路４７との一方を省略することができるとともに、通路切替装置５０も省略することができる。 In this embodiment, the movable mold 25 is provided with an upper first molding surface 30 and a lower first molding surface 31, and the fixed mold 26 is provided with an upper second molding surface 32 and a lower second molding surface 33. Although molding of the molded product 27 and molding of the elastic portion 4 can be performed at the same time, the present invention is not limited to this, and each of the first molding surface of the movable mold 25 and the second molding surface of the fixed mold 26 is one. Also good. By doing so, in the fixed mold 26, one of the upper resin material passage 46 and the lower resin material passage 47 can be omitted, and the passage switching device 50 can also be omitted.

また、上側樹脂材料通路４６及び下側樹脂材料通路４７の下流端は、突条部３２ｂにおける振動部側第１縦面部２ａや振動部側第２縦面部２ｃに開口させてもよいし、突条部３２ｂにおける保持部側第１縦面部３ａや保持部側第２縦面部３ｃに開口させてもよい。 Further, the downstream ends of the upper resin material passage 46 and the lower resin material passage 47 may be opened to the vibration portion side first vertical surface portion 2a and the vibration portion side second vertical surface portion 2c of the protrusion 32b, or the protrusions may be protruded. You may make it open to the holding | maintenance part side 1st vertical surface part 3a and the holding | maintenance part side 2nd vertical surface part 3c in the strip part 32b.

また、この実施形態では、可動型２５を水平方向に移動させることにより固定型２６に接離させるようにしたが、固定型２６の第２成形面３２、３３及び第３成形面３４を上方に向けて、可動型２５を上下方向に移動させることにより固定型２６に接離させるようにしてもよい。 In this embodiment, the movable mold 25 is moved in the horizontal direction so as to be brought into contact with and separated from the fixed mold 26. However, the second molding surfaces 32 and 33 and the third molding surface 34 of the fixed mold 26 are directed upward. Alternatively, the movable mold 25 may be moved toward and away from the fixed mold 26 by moving in the vertical direction.

また、振動板１は、携帯電話機以外にも例えば、携帯型の情報端末等のスピーカにも利用することができる。 Further, the diaphragm 1 can be used not only for a mobile phone but also for a speaker of a portable information terminal, for example.

以上説明したように、本発明に係る携帯機器用スピーカの振動板、その製造方法及びその製造方法に用いられる製造装置は、例えば携帯電話機の画面上に重ねて設けられるスピーカの振動板及び該振動板を製造する場合に用いることができる。 As described above, a diaphragm for a portable device speaker according to the present invention, a manufacturing method thereof, and a manufacturing apparatus used for the manufacturing method include, for example, a speaker diaphragm provided on a screen of a mobile phone and the vibration. It can be used when manufacturing a plate.

本発明の実施形態に係る振動板を表側から見た平面図である。It is the top view which looked at the diaphragm which concerns on embodiment of this invention from the front side. 振動板を示し、（ａ）は図１のＡ−Ａ線における断面図であり、（ｂ）は図１のＢ−Ｂ線における断面図である。The diaphragm is shown, (a) is a cross-sectional view taken along line AA in FIG. 1, and (b) is a cross-sectional view taken along line BB in FIG. 本発明の実施形態に係る製造装置の概略構造を示す断面図である。It is sectional drawing which shows schematic structure of the manufacturing apparatus which concerns on embodiment of this invention. 固定型を第２成形面側から見た正面図である。It is the front view which looked at the fixed mold from the 2nd molding surface side. 成形型の上側樹脂材料通路近傍の拡大図であり、（ａ）は型閉じした状態を示す図であり、（ｂ）は一次成形品を成形した状態を示す図である。It is an enlarged view of the upper side resin material passage vicinity of a shaping | molding die, (a) is a figure which shows the state closed, and (b) is a figure which shows the state which shape | molded the primary molded product. 図５相当図であり、（ａ）は一次成形品の成形後に型開きした状態を示す図であり、（ｂ）は弾性部を成形した状態を示す図である。FIG. 6 is a view corresponding to FIG. 5, wherein (a) is a view showing a state where the mold is opened after forming the primary molded product, and (b) is a view showing a state where an elastic portion is formed. 可動型を第１位置にして型閉じした状態の図３相当図である。FIG. 4 is a view corresponding to FIG. 3 in a state where the movable mold is in the first position and the mold is closed. 振動部成形用キャビティ及び保持部成形用キャビティに樹脂材料を流入させた状態の図３相当図である。FIG. 4 is a view corresponding to FIG. 3 in a state in which a resin material is caused to flow into a vibration part molding cavity and a holding part molding cavity. 可動型を第２位置にして型閉じした状態の図３相当図である。FIG. 4 is a view corresponding to FIG. 3 in a state where the movable mold is in the second position and the mold is closed. 弾性部成形用キャビティに弾性材料を流入させるとともに、振動部成形用キャビティ及び保持部成形用キャビティに樹脂材料を流入させた状態の図３相当図である。FIG. 4 is a view corresponding to FIG. 3 in a state in which an elastic material is caused to flow into an elastic portion molding cavity and a resin material is caused to flow into a vibrating portion molding cavity and a holding portion molding cavity. 型開きして振動板を脱型した状態を示す図３相当図である。FIG. 4 is a view corresponding to FIG. 3 illustrating a state where the mold is opened and the diaphragm is removed. 振動板を脱型した後に可動型を第１位置にして型閉じした状態の図３相当図である。FIG. 4 is a view corresponding to FIG. 3 in a state in which the movable mold is set to the first position and the mold is closed after removing the diaphragm. 実施形態の変形例に係る図５相当図である。FIG. 6 is a view corresponding to FIG. 5 according to a modification of the embodiment. 実施形態の変形例に係る図６相当図である。FIG. 7 is a diagram corresponding to FIG. 6 according to a modified example of the embodiment.

Explanation of symbols

１振動板
２振動部
３保持部
４弾性部
２０製造装置
２１成形型
２２樹脂材料射出装置（樹脂材料射出手段）
２３弾性材料射出装置（弾性材料射出手段）
２５可動型
２６固定型
２７一次成形品
３０、３１第１成形面
３２、３３第２成形面
３４第３成形面
３６スライド装置（可動型移動手段）
４０振動部成形用キャビティ
４１保持部成形用キャビティ
４４弾性部成形用キャビティ
４６上側樹脂通路
４７下側樹脂通路
Ｗ樹脂材料通路の跡 DESCRIPTION OF SYMBOLS 1 Diaphragm 2 Vibrating part 3 Holding part 4 Elastic part 20 Manufacturing apparatus 21 Mold 21 Resin material injection apparatus (resin material injection means)
23 Elastic material injection device (elastic material injection means)
25 movable mold 26 fixed mold 27 primary molded product 30, 31 first molding surface 32, 33 second molding surface 34 third molding surface 36 slide device (movable mold moving means)
40 Vibrating part forming cavity 41 Holding part forming cavity 44 Elastic part forming cavity 46 Upper resin passage 47 Lower resin passage W Trace of resin material passage

Claims

A diaphragm for a speaker for a mobile device provided on the screen of the mobile device,
A resin-made vibration part formed in a plate shape covering the screen and vibrated by a vibration source;
A holding portion that is provided at a distance from the outer peripheral portion of the vibrating portion and is held by the case of the portable device;
An elastic part provided between the vibrating part and the holding part, and elastically supporting the vibrating part with respect to the holding part;
The vibration part is provided with a joining surface to which the elastic part is joined,
A diaphragm for a portable device speaker, wherein a trace of a resin material passage formed when the vibrating portion is molded with a molding die is left on the joint surface.

A vibration part that is formed in a plate shape that covers the screen and is vibrated by a vibration source, a holding part that is provided at a distance from the outer periphery of the vibration part and is held by a case of a portable device, and the vibration part A manufacturing method for manufacturing a diaphragm for a speaker for a portable device, which is provided between a holding unit and is bonded to the vibrating unit and the holding unit and elastically supports the vibrating unit with respect to the holding unit. And
Closing the movable mold and the fixed mold, and forming the vibration part molding cavity and the holding part molding cavity by the first molding surface of the movable mold and the second molding surface of the fixed mold;
Flowing a resin material into the vibration part molding cavity from a position corresponding to a surface to which the elastic part of the vibration part is joined by a resin material passage;
A step of allowing a resin material to flow into the holding portion forming cavity through a resin material passage;
The movable mold and the stationary mold are opened while the primary molded product obtained by solidifying the resin material flowing into the vibrating section molding cavity and the holding section molding cavity is held on the first molding surface. Process,
The movable mold holding the primary molded product is moved until the primary molded product faces the third molding surface of the fixed mold, and the movable mold and the fixed mold are closed to form an elastic portion molding cavity. And a process of
A method of manufacturing a diaphragm for a speaker for a portable device, comprising: a step of causing an elastic material to flow into the elastic part forming cavity and integrally forming with the primary molded product.

A vibration part that is formed in a plate shape that covers the screen and is vibrated by a vibration source, a holding part that is provided at a distance from the outer periphery of the vibration part and is held by a case of a portable device, and the vibration part A manufacturing apparatus for manufacturing a diaphragm for a speaker for a portable device, which is provided between a holding unit and is bonded to the vibrating unit and the holding unit and includes an elastic unit that elastically supports the vibrating unit with respect to the holding unit. And
A movable mold having a first molding surface for molding one of the front side and the back side of the primary molded product including the vibration part and the holding part;
A fixed mold having a second molding surface for molding the other of the front side and the back side of the primary molded product and a third molding surface for molding the elastic part;
The movable mold has a first position where the first molding surface of the movable mold and the second molding surface of the fixed mold face each other, a first molding surface of the movable mold, and a third molding surface of the fixed mold. Movable moving means for switching to a second position opposite to each other;
A resin material passage that is provided in the fixed mold and communicates with the cavity forming cavity and the holding part forming cavity formed by closing the movable mold and the fixed mold when the movable mold is in the first position. When,
An elastic material passage that is provided in the fixed mold and communicates with an elastic part forming cavity formed by closing the movable mold and the fixed mold when the movable mold is in the second position;
Resin material injection means connected to the upstream end of the resin material passage;
Elastic material injection means connected to the upstream end of the elastic material passage,
An apparatus for manufacturing a diaphragm for a speaker for a portable device, wherein the communicating portion of the resin material passage with the cavity for molding the vibrating portion is positioned at a position corresponding to a surface to which the elastic portion of the vibrating portion is joined. .