JP5689987B1 - Flexible wiring board with sealing member and method for manufacturing the same - Google Patents

Flexible wiring board with sealing member and method for manufacturing the same

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JP5689987B1
JP5689987B1 JP2014005598A JP2014005598A JP5689987B1 JP 5689987 B1 JP5689987 B1 JP 5689987B1 JP 2014005598 A JP2014005598 A JP 2014005598A JP 2014005598 A JP2014005598 A JP 2014005598A JP 5689987 B1 JP5689987 B1 JP 5689987B1
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wiring board
flexible wiring
sealing member
seal member
seal
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JP2015135840A (en
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勝哉 山上
勝哉 山上
良 高見
良 高見
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Fujikura Ltd
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Abstract

【課題】組み付け等の作業性が良好で安価に製造する。【解決手段】シール部材付きフレキシブル配線基板は、フレキシブル配線基板と、このフレキシブル配線基板の一部を取り囲むエラストマーからなる環状のシール部材と、このシール部材とフレキシブル配線基板の間及びシール部材のフレキシブル配線基板挿通方向の両端にシール部材と一部が入り組むように一体的に形成された樹脂部材とを備える。【選択図】図１An object of the present invention is to manufacture at low cost with good workability such as assembly. A flexible wiring board with a sealing member includes a flexible wiring board, an annular sealing member made of an elastomer surrounding a part of the flexible wiring board, a flexible wiring between the sealing member and the flexible wiring board, and the flexible wiring of the sealing member. A seal member and a resin member integrally formed so as to partially enter at both ends in the board insertion direction are provided. [Selection] Figure 1

Description

この発明は、シール部材が一体的に取り付けられたシール部材付きフレキシブル配線基板及びその製造方法に関する。   The present invention relates to a flexible wiring board with a seal member to which a seal member is integrally attached and a method for manufacturing the same.

外気環境に曝される電子機器等の製品では、機器内部への塵や埃の入り込み、水分等の浸入などを防ぎながら他の機器等との電気的接続を行うために、防塵・防水等の性能を有するシール構造体（下記特許文献１参照）や、同様の性能のシール構造を備えたフレキシブル配線基板（下記特許文献２参照）が用いられている。   In products such as electronic devices that are exposed to the outside air environment, dust and water resistance are required to make electrical connections with other devices while preventing dust and dirt from entering the device and entering moisture. A seal structure having performance (see Patent Document 1 below) and a flexible wiring board (see Patent Document 2 below) having a seal structure with similar performance are used.

特許文献１に記載のシール構造体は、ハウジングに挿通されるフレキシブル配線基板にハウジングとフレキシブル配線基板との間を密封するエラストマー等のゴム状弾性材からなるシール部材が一体成形により形成された構造を備えている。また、特許文献２に記載のフレキシブル配線基板は、例えばフレキシブル配線基板の一部を包み込むようにインサート成形により一体的に形成されたエラストマー性を有する防水キャップを備え、この防水キャップの外周の溝にＯリングが取り付けられた構造を備えており、電子機器等の筐体に形成された通し孔の内周面にＯリングが密着することで防水がなされる構造となっている。   The seal structure described in Patent Document 1 is a structure in which a seal member made of a rubber-like elastic material such as an elastomer that seals between a housing and a flexible wiring board is formed by integral molding on a flexible wiring board that is inserted through the housing. It has. Moreover, the flexible wiring board described in Patent Document 2 includes a waterproof cap having an elastomeric property that is integrally formed by insert molding so as to wrap a part of the flexible wiring substrate, for example, and is provided in a groove on the outer periphery of the waterproof cap. It has a structure to which an O-ring is attached, and has a structure that is waterproofed by the O-ring being in close contact with the inner peripheral surface of a through hole formed in a housing of an electronic device or the like.

特開２００８−１３５７０５号公報JP 2008-135705 A 特開２００６−３４４８１３号公報JP 2006-344813 A

しかしながら、上記特許文献１に開示された従来技術のシール構造体では、エラストマー性のシール部材をフレキシブル配線基板に一体成形するためには、エラストマー性の樹脂材料を射出成形するのに大きな圧力を加える必要があるため射出成形機等の設備が大型化する傾向にあると共に、成形されたシール部材のバリ等を防ぐためには精密なエラストマー成形用の金型が必要となるため設備費用が高くなる傾向にある。そして、エラストマー性の樹脂材料を射出後に適正に硬化させるためには１サイクル当たり一般的な射出成形に用いられる樹脂材料よりも長い硬化時間が必要となるので、結果的に全体の製造コストが高くなるという問題がある。   However, in the conventional seal structure disclosed in Patent Document 1, in order to integrally mold the elastomeric seal member on the flexible wiring board, a large pressure is applied to the injection molding of the elastomeric resin material. Because there is a need, equipment such as an injection molding machine tends to be large, and in order to prevent burrs etc. of the molded seal member, a precise mold for elastomer molding is required, so equipment costs tend to increase It is in. Further, in order to properly cure the elastomeric resin material after injection, a longer curing time is required per cycle than a resin material used for general injection molding, resulting in a high overall manufacturing cost. There is a problem of becoming.

また、上記特許文献２に開示された従来技術のフレキシブル配線基板では、エラストマー性を有する防水キャップがフレキシブル配線基板に一体成形により形成されているため、フレキシブル配線基板と防水キャップとの間の気密性、水密性等のシール性は高いものの、防水キャップと機器等との間のシール性は、主に防水キャップに取り付けられたＯリングにより図られる構造である。このため、Ｏリング等の別部品が必須の構成となり、例えば防水キャップの通し孔への組み込み時にＯリングが外れてしまう場合があり、組み付け等の作業性が好ましくないという問題がある。   Further, in the conventional flexible wiring board disclosed in Patent Document 2, since the waterproof cap having elastomeric properties is formed by integral molding on the flexible wiring substrate, airtightness between the flexible wiring substrate and the waterproof cap is provided. Although the sealing performance such as watertightness is high, the sealing performance between the waterproof cap and the device is a structure mainly achieved by an O-ring attached to the waterproof cap. For this reason, another component such as an O-ring becomes an essential configuration. For example, the O-ring may come off when being assembled into the through hole of the waterproof cap, and there is a problem that workability such as assembling is not preferable.

この発明は、上述した従来技術による問題点を解消し、組み付け等の作業性が良好で安価に製造することができるシール部材付きフレキシブル配線基板及びその製造方法を提供することを目的とする。   SUMMARY OF THE INVENTION An object of the present invention is to provide a flexible wiring board with a seal member that can solve the above-described problems caused by the prior art, can be manufactured at low cost with good workability such as assembly, and the like.

本発明に係るシール部材付きフレキシブル配線基板は、フレキシブル配線基板と、このフレキシブル配線基板の一部を取り囲むエラストマーからなる環状のシール部材と、このシール部材と前記フレキシブル配線基板の間及び前記シール部材の前記フレキシブル配線基板挿通方向の両端に前記シール部材と一部が入り組むように一体的に形成された樹脂部材とを備えたことを特徴とする。   A flexible wiring board with a sealing member according to the present invention includes a flexible wiring board, an annular sealing member made of an elastomer surrounding a part of the flexible wiring board, a gap between the sealing member and the flexible wiring board, and the sealing member. The sealing member and the resin member integrally formed so that a part may entangle each other in the both ends of the flexible wiring board insertion direction are provided.

本発明に係るシール部材付きフレキシブル配線基板によれば、エラストマーからなる環状のシール部材とフレキシブル配線基板の間及びシール部材のフレキシブル配線基板挿通方向の両端にシール部材と一部が入り組むように樹脂部材が一体的に形成されているので、別途Ｏリング等の別部品をシール部材に取り付けて筐体の孔部に嵌め込む必要がないので組み付け等の作業性が良好である。また、エラストマー性の樹脂材料ではなく一般的な樹脂材料を射出成形してシール部材とフレキシブル配線基板とを樹脂部材により一体化するので、製造コストを抑えて安価に製造することができる。   According to the flexible wiring board with a sealing member according to the present invention, the resin member so that the sealing member and a part of the sealing member are interposed between the annular sealing member made of elastomer and the flexible wiring board and at both ends of the sealing member in the flexible wiring board insertion direction. Since it is integrally formed, it is not necessary to separately attach another part such as an O-ring to the seal member and fit into the hole of the housing, so that workability such as assembly is good. In addition, since a general resin material, not an elastomeric resin material, is injection-molded and the sealing member and the flexible wiring board are integrated by the resin member, the manufacturing cost can be reduced and the manufacturing can be performed at a low cost.

本発明の一実施形態においては、前記シール部材は、予め分割形成された複数の分割シール部材を組み合わせてなる。   In one embodiment of the present invention, the seal member is formed by combining a plurality of divided seal members formed in advance.

本発明の他の実施形態においては、前記複数の分割シール部材は、分割シール部材同士の合わせ面がクランク状の段差面により構成されている。   In another embodiment of the present invention, in the plurality of divided seal members, the mating surfaces of the divided seal members are constituted by crank-shaped step surfaces.

本発明に係るシール部材付きフレキシブル配線基板の製造方法は、電子機器の筐体に形成された挿通孔に挿通されると共に、前記挿通孔に嵌め込まれるエラストマーからなるシール部材が一部に取り付けられたシール部材付きフレキシブル配線基板の製造方法であって、エラストマーからなる環状のシール部材及びフレキシブル配線基板を、前記シール部材が前記フレキシブル配線基板の一部を取り囲むように射出成形用の金型内に配置する工程と、前記金型内に樹脂材料を射出して、前記シール部材と前記フレキシブル配線基板とを射出成形による樹脂部材を介して一体的に取り付ける工程とを備えたことを特徴とする。   The method for manufacturing a flexible wiring board with a seal member according to the present invention is inserted into an insertion hole formed in a housing of an electronic device, and a seal member made of an elastomer to be fitted into the insertion hole is attached to a part thereof. A method of manufacturing a flexible wiring board with a sealing member, wherein an annular sealing member made of an elastomer and a flexible wiring board are arranged in an injection mold so that the sealing member surrounds a part of the flexible wiring board And a step of injecting a resin material into the mold and integrally attaching the sealing member and the flexible wiring board via a resin member by injection molding.

本発明に係るシール部材付きフレキシブル配線基板の製造方法によれば、上記作用効果を有するシール部材付きフレキシブル配線基板を一般的な射出成形により製造することができるので、エラストマーからなるシール部材を射出成形によりフレキシブル配線基板と一体化する場合と比較して、安価にシール部材付きフレキシブル配線基板を製造することができる。   According to the method for manufacturing a flexible wiring board with a seal member according to the present invention, since the flexible wiring board with a seal member having the above-described effects can be manufactured by general injection molding, a sealing member made of an elastomer is injection molded. Therefore, a flexible wiring board with a seal member can be manufactured at a lower cost than when integrated with a flexible wiring board.

本発明によれば、組み付け等の作業性が良好で安価に製造することができる。   According to the present invention, workability such as assembling is good and can be manufactured at low cost.

本発明の一実施形態に係るシール部材付きフレキシブル配線基板の一部を示す斜視図である。It is a perspective view which shows a part of flexible wiring board with a sealing member which concerns on one Embodiment of this invention. 図１のＡ−Ａ’断面図である。It is A-A 'sectional drawing of FIG. 同シール部材付きフレキシブル配線基板の一部を示す分解斜視図である。It is a disassembled perspective view which shows a part of flexible wiring board with the said sealing member. 同シール部材付きフレキシブル配線基板を電子機器の筐体に組み付けた様子を示す断面図である。It is sectional drawing which shows a mode that the flexible wiring board with the same sealing member was assembled | attached to the housing | casing of the electronic device. 同シール部材付きフレキシブル配線基板の製造工程を示すフローチャートである。It is a flowchart which shows the manufacturing process of the flexible wiring board with the said sealing member. 同シール部材付きフレキシブル配線基板の製造工程における金型内の様子を示す平面図である。It is a top view which shows the mode in the metal mold | die in the manufacturing process of the flexible wiring board with the same sealing member. 本発明の他の実施形態に係るシール部材付きフレキシブル配線基板の一部を示す斜視図である。It is a perspective view which shows a part of flexible wiring board with a sealing member which concerns on other embodiment of this invention.

以下、添付の図面を参照して、この発明の実施形態に係るシール部材付きフレキシブル配線基板及びその製造方法を詳細に説明する。   Hereinafter, a flexible wiring board with a seal member and a manufacturing method thereof according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

図１は、本発明の一実施形態に係るシール部材付きフレキシブル配線基板の一部を示す斜視図、図２は図１のＡ−Ａ’断面図である。また、図３は、シール部材付きフレキシブル配線基板の一部を示す分解斜視図、図４はシール部材付きフレキシブル配線基板を電子機器の筐体に組み付けた様子を示す断面図である。   FIG. 1 is a perspective view showing a part of a flexible wiring board with a seal member according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line A-A ′ of FIG. 1. FIG. 3 is an exploded perspective view showing a part of the flexible wiring board with a seal member, and FIG. 4 is a cross-sectional view showing a state in which the flexible wiring board with the seal member is assembled to the casing of the electronic device.

図１〜図４に示すように、本発明の一実施形態に係るシール部材付きフレキシブル配線基板（以下、「Ｓ−ＦＰＣ」と呼ぶ。）１は、図示しない電子機器の筐体９０（図４参照）に形成された挿通孔９１に挿通される平板状のフレキシブル配線基板（以下、「ＦＰＣ」と呼ぶ。）１０と、この挿通孔９１に嵌め込まれる環状のシール部材２０とを備え、シール部材２０がＦＰＣ１０の一部に射出成形により形成された樹脂部材３０を介して一体的に取り付けられた構造を備えている。   As shown in FIGS. 1 to 4, a flexible wiring board with a seal member (hereinafter referred to as “S-FPC”) 1 according to an embodiment of the present invention is a housing 90 (FIG. 4) of an electronic device (not shown). A flat flexible wiring board (hereinafter referred to as “FPC”) 10 that is inserted into the insertion hole 91 formed in the reference hole) and an annular seal member 20 that is fitted into the insertion hole 91. 20 has a structure in which it is integrally attached to a part of the FPC 10 via a resin member 30 formed by injection molding.

ＦＰＣ１０は、図示は省略するが、可撓性を有する絶縁樹脂からなる帯状の絶縁基板上にパターン形成された銅箔等からなる配線を有し、これらを絶縁樹脂からなるカバーレイフィルムで覆った構造の公知の配線基板からなる。シール部材２０は、エラストマーからなり、ＦＰＣ１０とは別工程で予め別途作製されたものである。   Although not shown, the FPC 10 has wiring made of copper foil or the like patterned on a strip-like insulating substrate made of flexible insulating resin, and these are covered with a coverlay film made of insulating resin. It consists of a known wiring board with a structure. The seal member 20 is made of an elastomer, and is prepared separately in advance in a separate process from the FPC 10.

樹脂部材３０は、熱硬化性又は熱可塑性の絶縁樹脂等の樹脂材料を射出成形してなり、ＦＰＣ１０とシール部材２０との間に介在して両者を一体的に固定すると共に、シール部材２０と一部が入り組むように一体的に形成されたものである。すなわち、樹脂部材３０は、シール部材２０のＦＰＣ１０への固定とこれらの間の隙間の封止とを同時に行う役割を担っている。   The resin member 30 is formed by injection-molding a resin material such as a thermosetting or thermoplastic insulating resin, and is interposed between the FPC 10 and the seal member 20 so as to integrally fix them. It is integrally formed so that a part is complicated. That is, the resin member 30 plays a role of simultaneously fixing the sealing member 20 to the FPC 10 and sealing a gap between them.

このように構成されたＳ−ＦＰＣ１は、図２に示すように、ＦＰＣ１０のシール部材２０の被取付箇所の周囲が樹脂部材３０で隙間なく覆われ、この樹脂部材３０の周囲が更にシール部材２０で隙間なく覆われた上で、シール部材２０におけるＦＰＣ１０の長手方向（ＦＰＣ１０の挿通方向）に位置する前端部２１及び後端部２２が、樹脂部材３０の一部を構成する前方板３１及び後方板３２により挟まれて、これら各部の全てが一体的となった構造を備えている。これにより、各部の密着性は非常に高い構造となっている。   As shown in FIG. 2, the S-FPC 1 configured as described above is covered with the resin member 30 without a gap around the mounting portion of the seal member 20 of the FPC 10, and the periphery of the resin member 30 is further sealed with the seal member 20. The front end portion 21 and the rear end portion 22 that are located in the longitudinal direction of the FPC 10 in the seal member 20 (the insertion direction of the FPC 10) and the rear plate 31 that constitutes a part of the resin member 30 are covered. It is sandwiched between the plates 32 and has a structure in which all these parts are integrated. Thereby, the adhesiveness of each part has a very high structure.

シール部材２０の外周面２３の一部には、環状にシール部材２０を一周する状態の突条２４が形成されており、図４に示すように、この突条２４が変形しながら筐体９０の挿通孔９１の内周面と密着することで、挿通孔９１とシール部材２０との気密性や水密性等のシール性が確保される。   A part of the outer peripheral surface 23 of the seal member 20 is formed with a ridge 24 in a state of making a circle around the seal member 20, and as shown in FIG. By making close contact with the inner peripheral surface of the insertion hole 91, sealing properties such as airtightness and watertightness between the insertion hole 91 and the seal member 20 are ensured.

また、シール部材２０の前端部２１及び後端部２２には、それぞれ射出成形時に樹脂部材３０の前方板３１及び後方板３２の一部に形成される孔部３１ａ，３２ａに嵌まる凸部２５，２６が形成されており、これらが入り組むように係合することによりシール部材２０と樹脂部材３０とが確実に固定される。   Further, the front end portion 21 and the rear end portion 22 of the seal member 20 are respectively convex portions 25 that fit into holes 31a and 32a formed in part of the front plate 31 and the rear plate 32 of the resin member 30 at the time of injection molding. , 26 are formed, and the sealing member 20 and the resin member 30 are securely fixed by engaging with each other so as to be complicated.

樹脂部材３０は、図３においては構造を把握容易にするために、前方板３１と他の部分とに分割された状態で示されているが、実際には射出成形によって形成されるため一つの部品で構成されている。また、同様にシール部材２０もＦＰＣ１０の長手方向の軸心に沿った垂直断面で分割された状態で示されているが、シール部材２０は一つの部品であっても、２以上に複数分割された部品であってもよく、Ｓ−ＦＰＣ１の設計に伴って最良の構成を選択採用し得るものである。   In FIG. 3, the resin member 30 is shown in a state where it is divided into a front plate 31 and other parts in order to make the structure easy to grasp. It consists of parts. Similarly, the seal member 20 is also shown in a state of being divided by a vertical cross section along the longitudinal axis of the FPC 10, but the seal member 20 is divided into two or more even if it is a single component. The best configuration can be selected and adopted in accordance with the design of the S-FPC 1.

具体的には、例えばシール部材２０が複数分割された部品からなる場合は、ＦＰＣ１０の形状や大きさに適宜変化がある製品であっても所望の被取付箇所に容易に配置することが可能となる。   Specifically, for example, when the seal member 20 is composed of a plurality of divided parts, even a product in which the shape and size of the FPC 10 are appropriately changed can be easily arranged at a desired mounting location. Become.

なお、図４に示すように、樹脂部材３０の前方板３１は筐体９０の挿通孔９１内に挿入され、後方板３２は挿通孔９１の開口周縁の壁面９０ａにその前方端面３２ｂが当接される大きさにそれぞれ形成されている。これにより、Ｓ−ＦＰＣ１のシール部材２０及び樹脂部材３０は、挿通孔９１に確実に嵌め込まれて気密・水密に挿通孔９１に係止される。   As shown in FIG. 4, the front plate 31 of the resin member 30 is inserted into the insertion hole 91 of the housing 90, and the rear plate 32 is in contact with the wall surface 90 a of the opening periphery of the insertion hole 91. Each size is formed. Thereby, the seal member 20 and the resin member 30 of the S-FPC 1 are securely fitted into the insertion hole 91 and are locked to the insertion hole 91 in an airtight and watertight manner.

次に、Ｓ−ＦＰＣ１の製造方法について説明する。
図５は、Ｓ−ＦＰＣ１の製造工程を示すフローチャート、図６はＳ−ＦＰＣ１の製造工程における金型内の様子を示す平面図である。まず、予め上述したような構造のＦＰＣ１０を別途作製して準備すると共に、エラストマー成形用金型を用いてシール部材２０を別途作製して準備しておく。なお、ＦＰＣ１０に電子部品等の実装が必要な場合は予め実装処理を行っておく。 Next, a method for manufacturing S-FPC 1 will be described.
FIG. 5 is a flowchart showing the manufacturing process of the S-FPC 1, and FIG. 6 is a plan view showing the inside of the mold in the manufacturing process of the S-FPC 1. First, the FPC 10 having the structure as described above is separately prepared and prepared, and the seal member 20 is separately prepared and prepared using an elastomer molding die. If it is necessary to mount an electronic component or the like on the FPC 10, a mounting process is performed in advance.

次に、図６（ａ）に示すような射出成形用金型５０を準備する。図示の射出成形用金型５０は例えば下金型のみを示しており、ＦＰＣ配置用ザグリ５１と、シール部材配置兼用樹脂部材成形用ザグリ５２と、樹脂材料注入孔５３、余剰樹脂材料トラップ５４及びエア抜き孔５５とが予め形成加工されている。   Next, an injection mold 50 as shown in FIG. 6A is prepared. The injection mold 50 shown in the drawing shows, for example, only a lower mold, and includes an FPC placement counterbore 51, a seal member placement / resin member molding counterbore 52, a resin material injection hole 53, an excess resin material trap 54, and the like. The air vent hole 55 is formed and processed in advance.

射出成形用金型５０を準備したら、図６（ｂ）に示すように、別途作製されたＦＰＣ１０とシール部材２０とを、射出成形用金型５０のＦＰＣ配置用ザグリ５１及びシール部材配置兼用樹脂部材成形用ザグリ５２に、シール部材２０がＦＰＣ１０の一部を取り囲むようにそれぞれ配置してセットし（ステップＳ１００）、図示しない上金型を移動させて型締を行う（ステップＳ１０２）。   When the injection mold 50 is prepared, as shown in FIG. 6B, the FPC 10 and the seal member 20 that are separately manufactured are combined with the FPC placement counterbore 51 and the seal member placement combined resin of the injection mold 50. The seal members 20 are respectively arranged and set on the member forming counterbore 52 so as to surround a part of the FPC 10 (step S100), and an upper mold (not shown) is moved to perform mold clamping (step S102).

型締めを完了したら、樹脂材料注入孔５３から樹脂材料を射出成形用金型５０内に射出して、シール部材配置兼用樹脂部材成形用ザグリ５２に配置されているＦＰＣ１０及びシール部材２０に対し射出成形を行う（ステップＳ１０４）。このとき、図６（ｃ）に示すように、射出された樹脂材料がＦＰＣ１０及びシール部材２０がセットされたシール部材配置兼用樹脂部材成形用ザグリ５２内に満たされ、ＦＰＣ１０とシール部材２０との間の隙間等を完全に塞ぎ両者を固定する状態で樹脂部材３０が射出成形される。   When the mold clamping is completed, the resin material is injected into the injection molding die 50 from the resin material injection hole 53 and injected into the FPC 10 and the seal member 20 which are disposed in the counter member 52 for forming the seal member and the resin member. Molding is performed (step S104). At this time, as shown in FIG. 6 (c), the injected resin material is filled in the counterbore 52 for forming the sealing member and the resin member forming the sealing member 20 in which the FPC 10 and the sealing member 20 are set, and the FPC 10 and the sealing member 20 The resin member 30 is injection-molded in a state where the gaps and the like are completely closed and both are fixed.

その後、所定時間の樹脂硬化工程を経た後に、上金型を移動させて型開きを行って製品を取り出し（ステップＳ１０６）、製品検査を行って（ステップＳ１０８）、本フローチャートによる一連の製造工程を終了する。   Then, after a resin curing process for a predetermined time, the upper mold is moved, the mold is opened, the product is taken out (step S106), product inspection is performed (step S108), and a series of manufacturing processes according to this flowchart are performed. finish.

このように製造されたＳ−ＦＰＣ１は、エラストマーからなるシール部材２０を別部品として予め作製しておき、射出成形用金型５０にＦＰＣ１０とシール部材２０とを配置してセットした上で樹脂部材３０の射出成形を行うので、ＦＰＣ１０にエラストマーからなるシール部材を射出成形する場合と比較して、金型費用を削減することができ、安価に製造することが可能となる。   The S-FPC 1 manufactured in this way is prepared by preparing the sealing member 20 made of elastomer as a separate part in advance, placing the FPC 10 and the sealing member 20 in the injection mold 50, and setting the resin member. Since 30 injection molding is performed, compared with the case where the FPC 10 is injection-molded with a sealing member made of an elastomer, the mold cost can be reduced and the manufacturing cost can be reduced.

すなわち、エラストマー成形用金型は、一般的な樹脂材料を用いた射出成形用金型に比べて高い圧力が加わるために精度のよい加工が必要であり、金型費用が高くなる傾向にある。本実施形態に係るＳ−ＦＰＣ１では、エラストマーからなるシール部材２０は予め専用のエラストマー成形用金型を用いて別途作製しておくので、このエラストマー成形用金型にＦＰＣ１０を配置するためのＦＰＣ配置用ザグリ５１等を加工する必要がなく、金型構造を単純化することができるので、金型費用を削減することができる。   In other words, an elastomer molding die requires high precision processing because a higher pressure is applied compared to an injection molding die using a general resin material, and there is a tendency for mold costs to increase. In the S-FPC 1 according to the present embodiment, the seal member 20 made of elastomer is separately prepared in advance using a dedicated elastomer molding die, and therefore an FPC arrangement for arranging the FPC 10 in this elastomer molding die. There is no need to process the counterbore 51 and the like, and the mold structure can be simplified, so that the mold cost can be reduced.

なお、本実施形態に係るＳ−ＦＰＣ１の場合、エラストマー成形用金型の他に射出成形用金型５０が必要となるが、エラストマーに比べると樹脂部材３０を構成する一般的な樹脂材料は射出圧力が低いので、安価な材料のアルミニウム等により構成され加工が容易な金型を射出成形用金型５０として用いることができるので、全体的な金型費用は抑えることができる。   In the case of the S-FPC 1 according to the present embodiment, an injection molding die 50 is required in addition to the elastomer molding die, but a general resin material constituting the resin member 30 is injection compared to an elastomer. Since the pressure is low, a mold made of inexpensive material aluminum or the like and easy to process can be used as the injection mold 50, so that the overall mold cost can be suppressed.

また、Ｓ−ＦＰＣ１の製造工程に関しては、一般的な樹脂材料に比べて約１０倍程度の時間が掛かるエラストマーの成形・硬化工程が別工程となるため、スループットの向上を図ることもできる。そして、このスループットの向上に関しては、エラストマー成形用金型を単純化したことによる１サイクル当たりのシール部材２０の製造数（取り数）を増やすことができる点も貢献しているといえる。   Moreover, regarding the manufacturing process of S-FPC1, since the molding / curing process of the elastomer, which takes about 10 times as long as a general resin material, is a separate process, the throughput can be improved. And it can be said that the improvement of the throughput also contributes to the fact that the number of manufactured seal members 20 (cycle number) per cycle can be increased by simplifying the elastomer molding die.

更に、ＦＰＣ１０、シール部材２０及び樹脂部材３０が一体的に構成されるので、従来のようなＯリング等の別部品をシール部材２０に取り付けて挿通孔９１に嵌め込む必要がないので、Ｏリング等が外れてしまうなどの問題は皆無で、組み付け等の作業性は非常に良好なものとなる。   Further, since the FPC 10, the seal member 20, and the resin member 30 are integrally formed, it is not necessary to attach another part such as a conventional O-ring to the seal member 20 and fit into the insertion hole 91. There is no problem such as detachment, and the workability such as assembly is very good.

図７は、本発明の他の実施形態に係るシール部材付きフレキシブル配線基板の一部を示す斜視図である。上述した実施形態に係るＳ−ＦＰＣ１のシール部材２０は、２つの分割シール部材２８，２８を平面状の合わせ面２９，２９で合わせた状態で構成されていたが、本実施形態に係るシール部材２０は、２つの分割シール部材２８，２８の合わせ面２９，２９が、ＦＰＣ１０の長手方向においてクランク状となる段差面により構成されている点が相違している。   FIG. 7 is a perspective view showing a part of a flexible wiring board with a seal member according to another embodiment of the present invention. The seal member 20 of the S-FPC 1 according to the above-described embodiment is configured in a state in which the two divided seal members 28 and 28 are aligned with the planar mating surfaces 29 and 29. However, the seal member according to the present embodiment. 20 is different in that the mating surfaces 29 and 29 of the two divided seal members 28 and 28 are formed of a stepped surface having a crank shape in the longitudinal direction of the FPC 10.

このような構成とすることで、分割シール部材２８，２８の合わせ面２９，２９における組み合わせの確実性が向上すると共に、前方板３１及び後方板３２間の気密性や水密性等のシール性も更に確実なものとなる。なお、合わせ面２９，２９は、その他、図示は省略するが、組み合わせ可能な凹凸状の段差面により構成されていてもよい。   With such a configuration, the reliability of the combination of the split seal members 28 and 28 on the mating surfaces 29 and 29 is improved, and the sealing performance such as airtightness and watertightness between the front plate 31 and the rear plate 32 is also achieved. It will be more certain. In addition, although illustration is abbreviate | omitted in addition, the mating surfaces 29 and 29 may be comprised by the uneven | corrugated level | step difference surface which can be combined.

１ シール部材付きフレキシブル配線基板（Ｓ−ＦＰＣ）
１０ フレキシブル配線基板（ＦＰＣ）
２０ シール部材
２１ 前端部
２２ 後端部
２３ 外周面
２４ 突条
２５，２６ 凸部
２８ 分割シール部材
２９ 合わせ面
３０ 樹脂部材
３１ 前方板
３１ａ，３２ａ 孔部
３２ 後方板
３２ｂ 前方端面
５０ 射出成形用金型
５１ ＦＰＣ配置用ザグリ
５２ シール部材配置兼用樹脂成形用ザグリ
９０ 筐体
９１ 挿通孔 1 Flexible wiring board with seal member (S-FPC)
10 Flexible wiring board (FPC)
DESCRIPTION OF SYMBOLS 20 Seal member 21 Front end part 22 Rear end part 23 Outer peripheral surface 24 Projection part 25,26 Projection part 28 Split seal member 29 Matching surface 30 Resin member 31 Front board 31a, 32a Hole part 32 Rear board 32b Front end surface 50 Injection molding metal Mold 51 Counterbore for FPC placement 52 Counterbore for resin molding and resin molding 90 Housing 91 Insertion hole

Claims (3)

フレキシブル配線基板と、
このフレキシブル配線基板の一部を取り囲むエラストマーからなる環状のシール部材と、
このシール部材と前記フレキシブル配線基板の間及び前記シール部材の前記フレキシブル配線基板挿通方向の両端に前記シール部材と一部が入り組むように一体的に形成されたエラストマー性ではない樹脂部材と
を備え、
前記シール部材は、予め径方向に分割形成された複数の分割シール部材をそれらの合わせ面を介して組み合わせてなり、前記樹脂部材と入り組む部分が、前記樹脂部材の前記フレキシブル配線基板挿通方向の両端の部分に前記フレキシブル配線基板挿通方向に係合する凸部からなり、前記凸部が、前記合わせ面を間に挟んで一体的となるように異なる分割シール部材にそれぞれ形成され、
前記樹脂部材は、前記シール部材と前記フレキシブル配線基板とを、前記シール部材が前記フレキシブル配線基板の一部を取り囲むようにセットした状態で、前記シール部材及び前記フレキシブル配線基板に対して射出成形されることにより前記シール部材及び前記フレキシブル配線基板と一体的に形成されている
ことを特徴とするシール部材付きフレキシブル配線基板。 A flexible wiring board;
An annular sealing member made of an elastomer surrounding a part of the flexible wiring board;
A non- elastomeric resin member integrally formed between the sealing member and the flexible wiring board and at both ends of the sealing member in the flexible wiring board insertion direction so as to be partially embedded with the sealing member,
The seal member is formed by combining a plurality of split seal members that are divided in advance in the radial direction via their mating surfaces, and the portion that interlaces with the resin member is in the flexible wiring board insertion direction of the resin member. Consists of convex portions that engage in the flexible wiring board insertion direction at both end portions, and the convex portions are respectively formed on different split seal members so as to be integrated with the mating surface in between ,
The resin member is injection-molded with respect to the seal member and the flexible wiring board in a state where the sealing member and the flexible wiring board are set so that the sealing member surrounds a part of the flexible wiring board. Thus, the flexible wiring board with a sealing member is formed integrally with the sealing member and the flexible wiring board. 前記複数の分割シール部材は、分割シール部材同士の合わせ面が前記フレキシブル配線基板の挿通方向に対してクランク状の段差面により構成されている
ことを特徴とする請求項１記載のシール部材付きフレキシブル配線基板。 2. The flexible with seal member according to claim 1, wherein the plurality of split seal members are configured such that a mating surface between the split seal members is a crank-shaped stepped surface with respect to the insertion direction of the flexible wiring board. Wiring board. 電子機器の筐体に形成された挿通孔に挿通されると共に、前記挿通孔に嵌め込まれるエラストマーからなるシール部材が一部に取り付けられたシール部材付きフレキシブル配線基板の製造方法であって、
エラストマーからなり、予め径方向に分割形成された複数の分割シール部材をそれらの合わせ面を介して組み合わせてなる環状のシール部材及びフレキシブル配線基板を、前記シール部材の各分割シール部材を前記フレキシブル配線基板の一部を取り囲むように配置してから射出成形用の金型内に配置する工程と、
前記金型内にエラストマー性ではない樹脂材料を射出して、前記シール部材と前記フレキシブル配線基板の間及び前記シール部材の前記フレキシブル配線基板挿通方向の両端に前記樹脂材料を供給して前記シール部材と前記フレキシブル配線基板とを射出成形による樹脂部材を介して一体的に取り付ける工程とを備え、
前記シール部材は、前記樹脂部材の射出成形により前記樹脂部材の前記フレキシブル配線基板挿通方向の両端の部分に係合する凸部を有し、前記凸部は、前記合わせ面を間に挟んで一体的になるように異なる分割シール部材にそれぞれ形成されている
ことを特徴とするシール部材付きフレキシブル配線基板の製造方法。 A method for producing a flexible wiring board with a seal member, which is inserted into an insertion hole formed in a housing of an electronic device and a seal member made of an elastomer fitted in the insertion hole is attached to a part thereof,
An annular seal member and a flexible wiring board formed by combining a plurality of divided seal members made of elastomer in advance and divided in the radial direction via their mating surfaces, and each divided seal member of the seal member as the flexible wiring Placing the substrate in a mold for injection molding after surrounding a part of the substrate;
A resin material that is not elastomeric is injected into the mold, and the resin material is supplied between the seal member and the flexible wiring board and to both ends of the seal member in the insertion direction of the flexible wiring board. And a step of integrally attaching the flexible wiring board via a resin member by injection molding,
The seal member has protrusions that engage with both ends of the resin member in the flexible wiring board insertion direction by injection molding of the resin member, and the protrusions are integrated with the mating surface in between. The manufacturing method of the flexible wiring board with a sealing member characterized by being formed in different division | segmentation sealing members so that it may become .
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