JP6875506B2 - 音響デバイスを保護するためのアセンブリ - Google Patents
音響デバイスを保護するためのアセンブリ Download PDFInfo
- Publication number
- JP6875506B2 JP6875506B2 JP2019514009A JP2019514009A JP6875506B2 JP 6875506 B2 JP6875506 B2 JP 6875506B2 JP 2019514009 A JP2019514009 A JP 2019514009A JP 2019514009 A JP2019514009 A JP 2019514009A JP 6875506 B2 JP6875506 B2 JP 6875506B2
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- film
- laser
- base material
- polymer base
- laser beam
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- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
- B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
- B29C65/4825—Pressure sensitive adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
- B29C65/5057—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like positioned between the surfaces to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/303—Particular design of joint configurations the joint involving an anchoring effect
- B29C66/3032—Particular design of joint configurations the joint involving an anchoring effect making use of protrusions or cavities belonging to at least one of the parts to be joined
- B29C66/30325—Particular design of joint configurations the joint involving an anchoring effect making use of protrusions or cavities belonging to at least one of the parts to be joined making use of cavities belonging to at least one of the parts to be joined
- B29C66/30326—Particular design of joint configurations the joint involving an anchoring effect making use of protrusions or cavities belonging to at least one of the parts to be joined making use of cavities belonging to at least one of the parts to be joined in the form of porosity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
- B29C66/8122—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
- B29C66/939—Measuring or controlling the joining process by measuring or controlling the speed characterised by specific speed values or ranges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3418—Loud speakers
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- 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
- H04R2201/02—Details casings, cabinets or mounting therein for transducers covered by H04R1/02 but not provided for in any of its subgroups
- H04R2201/029—Manufacturing aspects of enclosures transducers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
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- Health & Medical Sciences (AREA)
- Signal Processing (AREA)
- Acoustics & Sound (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Laminated Bodies (AREA)
- Laser Beam Processing (AREA)
Description
本発明は、特にePTFE膜を含む、音響デバイスを保護するためのアセンブリ、及びさらにそのようなアセンブリを製造する方法に関する。このアセンブリは音響ベントと呼ばれることがある。
携帯電話又はウェアラブルなどの電子デバイスは、音響デバイス、一般には、マイクロホン、スピーカなどのトランスデューサを含むことができる。音響伝達を可能にするために、電子デバイスの筐体は音響デバイスの上に配置された開口部を有する。しかしながら、汚染物質が筐体に入り込み、音響性能を低下させることがある。音響デバイスを保護するために、保護性音響カバーは開口部上に配置され、ダスト及び水の浸入による損傷からトランスデューサを保護する。典型的には、音響特性に対する悪影響を最小限に抑制しながら、音響デバイスをダスト、液体及び他の汚染物質から保護するために、多孔性かつ水不透過性であることができる延伸ポリテトラフルオロエチレン(ePTFE)膜を含む、音響デバイスを保護するためのアセンブリは使用される。
したがって、本発明の目的は、製造が容易でありそして音響特性が改良された、特にePTFE膜を含む、音響デバイスを保護するためのアセンブリ、ならびにそのようなアセンブリを製造するための改良された方法を提供することである。
前述の要旨ならびに以下の好ましい実施形態の詳細な説明は添付の図面と併せて読むときによりよく理解されるであろう。本開示を例示する目的で、図面を参照する。しかしながら、本開示の範囲は、図面に開示された特定の実施形態に限定されない。図面において、
図1Aから図1Cを参照すると、音響デバイスを保護するためのアセンブリ1の一般的な実施形態が示されている。アセンブリ1は、音響カバー、音響保護カバー又は音響ベントと呼ばれることがある。図1Aは音響ベントの斜視図を示し、図1Bは上面図を示し、図1Cは図1Bにおける線C−Cに沿った断面図を示す。図面は概略的なものにすぎず、縮尺通りではないこと、特に断面図であることを理解されたい。アセンブリ1は、携帯電話内のマイクロホン又はスピーカ(図示せず)などの電子デバイス内の音響デバイスを保護するように構成される。他の電子デバイスにおける他のトランスデューサのための様々な用途が想定されうることは理解されるであろう。アセンブリ1は、ePTFE膜3によって覆われた円形の開口部7を有する円形として示されている。アセンブリ1は、約2mmであることができる外径Dを有し、開口部7は、約1mmであることができる内径dを有する。膜3は、膜3の上面又は第一の面5上の上部又は第一のポリマー基材2と、膜3の底面又は第二の面6上の底部又は第二のポリマー基材4とによって支持されている。 ポリマー基材2,4は、支持層と呼ばれることができ、ポリカーボネート(PC)、ポリプロピレン(PP)又はポリエチレン(PE)から作られてよい。したがって、アセンブリ1は、3つの層2、3、4の複合体、すなわち第一及び第二のポリマー基材2,4の間に挟まれた膜3を含む。
上記の教示に従って、具体的な例を以下に説明する。この例は、図3A〜3Cに示した実施形態と同様である。試験膜は、米国特許第3,953,566号明細書の教示に従って製造された延伸PTFE膜(白色)であった。膜はまた、米国特許第7,306,729号又は米国特許第5,814,405号明細書に従って製造することもできる。
比較例において、上記と同様の寸法の音響保護カバーを使用したが、音響保護カバーは、レーザ溶接の代わりに感圧接着剤(PSA)を使用することによって作成した。厚さ5μmの膜を2つのPSA(それぞれ100μm厚)の間に保持した。
音響カバーサンプルを試験するために以下の方法を使用した。試験は音響応答測定試験設備で実施した。サンプルホルダープレート上の直径1mmの円形開口部の上に接着剤によりサンプルを配置した。内部ドライバー又はスピーカから6.5cmの距離でB&K type 4232無エコー性テストボックスの中にサンプルを配置した。マイクロホンは、ベースプレートによって無エコー性テストプレートと一緒に静止保持させる。圧縮板は、前記圧縮板をサンプルホルダー上に配置されたベントと接触するように案内するためのレールに移動可能に固定される。ばね及びねじ付きアジャスタによって圧縮板に一定の圧縮力を加える。試験中の力は、圧縮板とばねとの間に配置されたTE Connectivity Instrumentsから入手可能なロードセルFC2231−0000−0010−Lによって測定される。100Hz〜11.8kHzの周波数範囲にわたって1Paの音圧(94dB SPL)で外部刺激を生成するようにスピーカを励起した。音響応答を、Knowles SPA2410LR5H MEMS測定マイクロホンを用いて、以下の条件下で測定した:(a)開口部が覆われていない状態、(b)開口部が音響保護カバーで覆われた状態。応答の差を、保護カバーによる音響損失としてdBで(指定された周波数で)報告した(上記表を参照されたい)。
(態様)
(態様1)
第一の面(5)と、前記第一の面(5)とは反対側の第二の面(6)とを有する延伸ポリテトラフルオロエチレン(ePTFE)膜(3)と、
前記膜(3)の第一の面(5)の一部のみに配置された第一のポリマー基材(2)と、
前記第一のポリマー基材(4)とは反対側の前記膜(3)の第二の面(6)の一部のみに配置された第二のポリマー基材(4)と、
を含み、ここで、前記第一の基材(2)は所定の波長のレーザ光に対して少なくとも部分的に透過性であり、前記膜(3)は、それぞれ、前記膜(3)の第一の面(5)及び前記膜(3)の第二の面(6)の上の第一及び第二のレーザ溶接接合部(9,10)によって前記第一及び第二の基材(2,4)に結合されている、音響デバイスを保護するためのアセンブリ(1)。
(態様2)
前記第一及び第二のレーザ溶接接合部(9,10)はレーザ透過溶接プロセスにより得られ、前記第一及び第二のレーザ溶接接合部(9,10)は互いに合同である、態様1記載のアセンブリ。
(態様3)
第一の面(5)と、前記第一の面(5)とは反対側の第二の面(6)とを有する延伸ポリテトラフルオロエチレン(ePTFE)膜(3)と、
前記膜(3)の第一の面(5)の一部のみに配置された第一のポリマー基材(2)と、
前記第一のポリマー基材(2)とは反対側の前記膜(3)の第二の面(6)の一部のみに配置された第二のポリマー基材(4)と、
を含み、ここで、前記第一の基材(2)は所定の波長のレーザ光に対して少なくとも部分的に透過性であり、前記膜(3)は、それぞれ、前記膜(3)の第一の面(5)及び前記膜(3)の第二の面(6)の上の第一及び第二のレーザ溶接接合部(9,10)によって前記第一及び第二の基材(2,4)に結合されており、前記膜(3)の第一の面(5)又は第二の面(6)のいずれかは前記レーザ光に対して少なくとも部分的に吸収性であり、前記第一及び第二の面(5,6)のそれぞれの他方の面は前記レーザ光に対して少なくとも部分的に透過性である、音響デバイスを保護するためのアセンブリ(1)。
(態様4)
前記第二のポリマー基材(4)は前記所定の波長のレーザ光に対して吸収性である、態様3記載のアセンブリ。
(態様5)
前記膜(3)の第一の面(5)又は第二の面(6)のいずれかは前記レーザ光に対して少なくとも部分的に吸収性であり、前記第一及び第二の面(5,6)のそれぞれの他方の面は前記レーザ光に対して少なくとも部分的に透過性であり、前記第二のポリマー基材(4)は、好ましくは、前記所定の波長のレーザ光に対して吸収性である、態様1記載のアセンブリ。
(態様6)
前記レーザ光に対して少なくとも部分的に吸収性である前記膜(3)の第一及び第二の面(5,6)のうちの一方は、実質的に不透明であり、好ましくは黒色である、態様3〜5のいずれか1項記載のアセンブリ。
(態様7)
前記膜(3)の第一の面(5)は第一の色を有し、前記膜(5)の第二の面(6)は前記第一の色とは異なる第二の色を有する、態様1〜6のいずれか1項記載のアセンブリ。
(態様8)
前記膜(3)の第一の面(5)は黒色であり、前記膜の第二の面(6)は白色又は灰色である、態様7記載のアセンブリ。
(態様9)
前記膜(3)の第一の面(5)と前記膜(3)の第二の面(6)との間に色勾配が存在する、態様7又は8記載のアセンブリ。
(態様10)
前記膜(3)の第一の面(5)の色及び前記膜(3)の第二の面(6)の色の少なくとも一方は、前記膜(3)の多孔質構造に統合されているか、又は、コーティングのようにキャリア内で前記膜(3)のそれぞれの表面に付着されている、態様7〜9のいずれか1項記載のアセンブリ。
(態様11)
前記膜(3)は前記膜(3)の第一の面(5)及び第二の面(6)の少なくとも一方に適用されたコーティング(8)を含み、前記コーティング(8)は好ましくは黒色を示す、態様3〜10のいずれか1項記載のアセンブリ。
(態様12)
前記コーティング(8)は、前記レーザ光に対して少なくとも部分的に吸収性である、前記膜(3)の第一及び第二の面(5,6)のうちの一方に適用されている、態様11記載のアセンブリ。
(態様13)
前記膜(3)の第一の面(5)及び前記膜(3)の第二の面(6)は前記レーザ光に対して実質的に同じ透過特性を有する、態様1記載のアセンブリ。
(態様14)
前記膜(3)は前記所定の波長のレーザ光に対して少なくとも部分的に透過性であるか、又は、前記膜(3)は前記所定の波長のレーザ光に対して少なくとも部分的に吸収性である、態様13記載のアセンブリ。
(態様15)
前記膜(3)は、レーザ溶接プロセスによって発生され、前記レーザ溶接プロセス中に前記第一及び第二のレーザ溶接接合部(9,10)を形成するのに必要な十分な量の熱を、前記膜(3)を通して通過させることができる厚さを有し、前記膜(3)は、好ましくは約10μm、好ましくは10μm未満、より好ましくは5μmの厚さを有する、態様1〜14のいずれか1項記載のアセンブリ。
(態様16)
前記第二のポリマー基材(4)は前記所定の波長のレーザ光に対して吸収性である、態様1〜15のいずれか1項記載のアセンブリ。
(態様17)
前記第一のポリマー基材(2)及び第二のポリマー基材(4)のうちの少なくとも一方は約100μm、好ましくは100μm未満の厚さを有する、態様1〜16のいずれか1項記載のアセンブリ。
(態様18)
前記第一のポリマー基材(2)及び第二のポリマー基材(4)のうちの少なくとも一方はポリカーボネート又はポリプロピレンを含む、態様1〜17のいずれか1項記載のアセンブリ。
(態様19)
前記膜(3)は透明であり、透明なレーザ吸収性添加剤を有する、態様1〜18のいずれか1項記載のアセンブリ。
(態様20)
前記膜(3)は防水性であり、前記膜(3)は、好ましくは、少なくとも1PSIの水浸入圧力(WEP)を有する、態様1〜19のいずれか1項記載のアセンブリ。
(態様21)
前記アセンブリ(1)は音を通過させるための開口部を保護するための音響ベントであり、前記アセンブリ(1)は、好ましくは、1,000Hzで5dB未満、より好ましくは、1,000Hzで1.5dB未満の音響損失を有する、態様1〜20のいずれか1項記載のアセンブリ。
(態様22)
音響デバイスを保護するためのアセンブリ(1)の製造方法であって、前記方法は、
第一の面(5)と、前記第一の面(5)とは反対側の第二の面(6)とを有する延伸ポリテトラフルオロエチレン(ePTFE)膜(3)を提供することと、
前記膜(3)の第一の面(5)の一部のみに第一のポリマー基材(2)を提供することであって、前記第一のポリマー基材(2)は所定の波長のレーザ光に対して少なくとも部分的に透過性であることと、
前記第一のポリマー基材(2)とは反対側の前記膜(3)の第二の面(6)の一部にのみ第二のポリマー基材(4)を提供することと、
前記第一のポリマー基材(2)を通して前記第二のポリマー基材(4)に向かって前記所定の波長のレーザビームを照射し、それにより、それぞれ、前記第一のポリマー基材(2)を有する前記膜(3)の第一の面(5)及び前記第二のポリマー基材(4)を有する前記膜(3)の第二の面(6)上に、第一及び第二のレーザ溶接接合部(9,10)を形成することによるレーザ透過溶接によって前記膜(3)を前記第一及び第二のポリマー基材(2,4)に結合させることと、
の工程を含む、方法。
(態様23)
前記膜(3)の第一の面(5)又は第二の面(6)のいずれかは前記レーザ光を少なくとも部分的に吸収し、前記第一及び第二の面(5,6)のそれぞれの他方の面は前記レーザ光を少なくとも部分的に透過させ、それにより、前記第一及び第二のレーザ溶接接合部(9,10)は同時に形成される、態様22記載の方法。
(態様24)
前記レーザ光を少なくとも部分的に吸収する前記膜(3)の第一及び第二の面(5,6)のうちの一方は、実質的に不透明であり、好ましくは黒色である、態様23記載の方法。
(態様25)
前記膜(3)の第一の面(5)は第一の色を有し、前記膜(3)の第二の面は前記第一の色とは異なる第二の色を有する、態様22〜24のいずれか1項記載の方法。
(態様26)
前記膜(3)の第一の面(5)は黒色であり、前記膜の第二の面(6)は白色又は灰色である、態様25記載の方法。
(態様27)
前記膜(3)の第一の面(5)と前記膜(3)の第二の面(6)との間に色勾配が存在する、態様25又は26記載の方法。
(態様28)
前記膜(3)の第一の面(5)の色及び前記膜(3)の第二の面(6)の色の少なくとも一方は前記膜(3)の多孔質構造に統合されているか、又は、コーティングのようにキャリア内で前記膜(3)のそれぞれの表面に付着されている、態様25〜27のいずれか1項記載の方法。
(態様29)
前記膜(3)は前記膜(3)の第一の面(5)及び第二の面(6)の少なくとも一方に適用されたコーティング(8)を含み、前記コーティング(8)は好ましくは黒色を示す、態様22〜27のいずれか1項記載の方法。
(態様30)
前記コーティング(8)は前記レーザ光を少なくとも部分的に吸収する前記膜(3)の第一及び第二の面(5,6)のうちの一方に適用されている、態様29記載の方法。
(態様31)
前記膜(3)の第一の面(5)及び前記膜(3)の第二の面(6)は前記レーザ光に対して実質的に同じ透過特性を有する、態様22記載の方法。
(態様32)
前記膜(3)は前記所定の波長のレーザ光を少なくとも部分的に透過するか、又は、前記膜(3)は前記所定の波長のレーザ光を少なくとも部分的に吸収する、態様31記載の方法。
(態様33)
前記膜(3)は、レーザ透過溶接プロセスによって発生され、前記レーザ透過溶接プロセス中に前記第一及び第二のレーザ溶接接合部(9,10)を形成するのに必要な十分な量の熱を、前記膜(3)を通して通過させることができる厚さを有し、前記膜(3)は、好ましくは約10μm、好ましくは10μm未満、より好ましくは5μmの厚さを有する、態様22〜32のいずれか1項記載の方法。
(態様34)
前記第二のポリマー基材(4)は前記所定の波長のレーザ光を吸収する、態様22〜33のいずれか1項記載の方法。
(態様35)
前記所定の波長は約960nm〜約1064nmの範囲にある、態様22〜34のいずれか1項記載の方法。
(態様36)
結合工程の間に前記膜(3)の第二の面(6)から真空を課す工程をさらに含む、態様22〜35のいずれか1項記載の方法。
Claims (21)
- 第一の面(5)と、前記第一の面(5)とは反対側の第二の面(6)とを有する延伸ポリテトラフルオロエチレン(ePTFE)膜(3)と、
前記膜(3)の第一の面(5)の一部のみに配置された第一のポリマー基材(2)と、
前記第一のポリマー基材(4)とは反対側の前記膜(3)の第二の面(6)の一部のみに配置された第二のポリマー基材(4)と、
を含み、ここで、前記第一の基材(2)は所定の波長のレーザ光に対して少なくとも部分的に透過性であり、前記膜(3)は、それぞれ、前記膜(3)の第一の面(5)及び前記膜(3)の第二の面(6)の上の第一及び第二のレーザ溶接接合部(9,10)によって前記第一及び第二の基材(2,4)に結合されており、
前記膜(3)内の吸収されたレーザエネルギーの分割は前記膜(3)の前記第一の面(5)と前記膜(3)の前記第二の面(6)との間に存在する勾配によって制御されている、音響デバイスを保護するためのアセンブリ(1)。 - 前記第一及び第二のレーザ溶接接合部(9,10)はレーザ透過溶接プロセスにより得られ、前記第一及び第二のレーザ溶接接合部(9,10)は互いに合同である、請求項1記載のアセンブリ。
- 第一の面(5)と、前記第一の面(5)とは反対側の第二の面(6)とを有する延伸ポリテトラフルオロエチレン(ePTFE)膜(3)と、
前記膜(3)の第一の面(5)の一部のみに配置された第一のポリマー基材(2)と、
前記第一のポリマー基材(2)とは反対側の前記膜(3)の第二の面(6)の一部のみに配置された第二のポリマー基材(4)と、
を含み、ここで、前記第一の基材(2)は所定の波長のレーザ光に対して少なくとも部分的に透過性であり、前記膜(3)は、それぞれ、前記膜(3)の第一の面(5)及び前記膜(3)の第二の面(6)の上の第一及び第二のレーザ溶接接合部(9,10)によって前記第一及び第二の基材(2,4)に結合されており、前記膜(3)の第一の面(5)又は第二の面(6)のいずれかは前記レーザ光に対して少なくとも部分的に吸収性であり、前記第一及び第二の面(5,6)のそれぞれの他方の面は前記レーザ光に対して少なくとも部分的に透過性であり、
前記膜(3)内の吸収されたレーザエネルギーの分割は前記膜(3)の前記第一の面(5)と前記膜(3)の前記第二の面(6)との間に存在する勾配によって制御されている、音響デバイスを保護するためのアセンブリ(1)。 - 前記膜(3)の第一の面(5)又は第二の面(6)のいずれかは前記レーザ光に対して少なくとも部分的に吸収性であり、前記第一及び第二の面(5,6)のそれぞれの他方の面は前記レーザ光に対して少なくとも部分的に透過性である、請求項1記載のアセンブリ。
- 前記膜(3)の第一の面(5)は第一の色を有し、前記膜(5)の第二の面(6)は前記第一の色とは異なる第二の色を有する、請求項1〜4のいずれか1項記載のアセンブリ。
- 前記膜(3)の第一の面(5)と前記膜(3)の第二の面(6)との間に色勾配が存在する、請求項5記載のアセンブリ。
- 前記膜(3)は、レーザ溶接プロセスによって発生され、前記レーザ溶接プロセス中に前記第一及び第二のレーザ溶接接合部(9,10)を形成するのに必要な十分な量の熱を、前記膜(3)を通して通過させることができる厚さを有する、請求項1〜6のいずれか1項記載のアセンブリ。
- 前記第二のポリマー基材(4)は前記所定の波長のレーザ光に対して吸収性である、請求項1〜7のいずれか1項記載のアセンブリ。
- 前記第一のポリマー基材(2)及び第二のポリマー基材(4)のうちの少なくとも一方は約100μmの厚さを有する、請求項1〜8のいずれか1項記載のアセンブリ。
- 前記第一のポリマー基材(2)及び第二のポリマー基材(4)のうちの少なくとも一方はポリカーボネート又はポリプロピレンを含む、請求項1〜9のいずれか1項記載のアセンブリ。
- 前記膜(3)は透明であり、透明なレーザ吸収性添加剤を有する、請求項1〜10のいずれか1項記載のアセンブリ。
- 前記膜(3)は防水性である、請求項1〜11のいずれか1項記載のアセンブリ。
- 前記アセンブリ(1)は音を通過させるための開口部を保護するための音響ベントである、請求項1〜12のいずれか1項記載のアセンブリ。
- 音響デバイスを保護するためのアセンブリ(1)の製造方法であって、前記方法は、
第一の面(5)と、前記第一の面(5)とは反対側の第二の面(6)とを有する延伸ポリテトラフルオロエチレン(ePTFE)膜(3)を提供することと、
前記膜(3)の第一の面(5)の一部のみに第一のポリマー基材(2)を提供することであって、前記第一のポリマー基材(2)は所定の波長のレーザ光に対して少なくとも部分的に透過性であることと、
前記第一のポリマー基材(2)とは反対側の前記膜(3)の第二の面(6)の一部にのみ第二のポリマー基材(4)を提供することと、
前記第一のポリマー基材(2)を通して前記第二のポリマー基材(4)に向かって前記所定の波長のレーザビームを照射し、それにより、それぞれ、前記第一のポリマー基材(2)を有する前記膜(3)の第一の面(5)及び前記第二のポリマー基材(4)を有する前記膜(3)の第二の面(6)上に、第一及び第二のレーザ溶接接合部(9,10)を形成することによるレーザ透過溶接によって前記膜(3)を前記第一及び第二のポリマー基材(2,4)に結合させることと、
の工程を含み、
前記膜(3)内の吸収されたレーザエネルギーの分割は前記膜(3)の前記第一の面(5)と前記膜(3)の前記第二の面(6)との間に存在する勾配によって制御されている、方法。 - 前記膜(3)の第一の面(5)又は第二の面(6)のいずれかは前記レーザ光を少なくとも部分的に吸収し、前記第一及び第二の面(5,6)のそれぞれの他方の面は前記レーザ光を少なくとも部分的に透過させ、それにより、前記第一及び第二のレーザ溶接接合部(9,10)は同時に形成される、請求項14記載の方法。
- 前記膜(3)の第一の面(5)と前記膜(3)の第二の面(6)との間に色勾配が存在する、請求項14記載の方法。
- 前記膜(3)は前記膜(3)の第一の面(5)及び第二の面(6)の少なくとも一方に適用されたコーティング(8)を含む、請求項14〜16のいずれか1項記載の方法。
- 前記膜(3)の第一の面(5)及び前記膜(3)の第二の面(6)は前記レーザ光に対して実質的に同じ透過特性を有する、請求項14記載の方法。
- 前記膜(3)は、レーザ透過溶接プロセスによって発生され、前記レーザ透過溶接プロセス中に前記第一及び第二のレーザ溶接接合部(9,10)を形成するのに必要な十分な量の熱を、前記膜(3)を通して通過させることができる厚さを有する、請求項14〜18のいずれか1項記載の方法。
- 前記第二のポリマー基材(4)は前記所定の波長のレーザ光を吸収する、請求項14〜19のいずれか1項記載の方法。
- 結合工程の間に前記膜(3)の第二の面(6)から真空を課す工程をさらに含む、請求項14〜20のいずれか1項記載の方法。
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