JP4245454B2 - Structure to prevent static electricity from entering the board - Google Patents

Structure to prevent static electricity from entering the board Download PDF

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JP4245454B2
JP4245454B2 JP2003363052A JP2003363052A JP4245454B2 JP 4245454 B2 JP4245454 B2 JP 4245454B2 JP 2003363052 A JP2003363052 A JP 2003363052A JP 2003363052 A JP2003363052 A JP 2003363052A JP 4245454 B2 JP4245454 B2 JP 4245454B2
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switch
substrate
insulating sheet
static electricity
flexible substrate
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JP2005129333A (en
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真仁 須山
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帝国通信工業株式会社
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Description

本発明は、基板に設けた各種回路パターンに静電気が侵入するのを防止する基板への静電気侵入防止構造に関するものである。   The present invention relates to a structure for preventing static electricity from entering a substrate that prevents static electricity from entering various circuit patterns provided on the substrate.

従来、その表面にスイッチパターン等の各種回路パターンを設けてなるフレキシブル基板が、各種電気機器に使用されている。そしてこの種のフレキシブル基板の中には、その表面の各種回路パターンに静電気が侵入するのを防止する静電気侵入防止構造を具備するものがある。   Conventionally, a flexible substrate having various circuit patterns such as switch patterns provided on the surface thereof has been used for various electric devices. Some types of flexible substrates include a static electricity intrusion prevention structure that prevents static electricity from entering various circuit patterns on the surface thereof.

従来、基板への静電気侵入防止構造としては、フレキシブル基板を構成するフイルム全体にシールド用のアルミ箔を貼り付ける方法が提案されている(特許文献1参照)。またこのフレキシブル基板を収納する外装ケースの内面にシールド用のアルミ箔を貼り付ける方法もある。   Conventionally, as a structure for preventing static electricity from entering a substrate, a method of attaching an aluminum foil for shielding to the entire film constituting the flexible substrate has been proposed (see Patent Document 1). There is also a method in which an aluminum foil for shielding is attached to the inner surface of the outer case that houses the flexible substrate.

ところで上記静電気侵入防止構造は、その表面にスイッチを形成してなるフレキシブル基板に用いて特に好適である。何故ならこの種のフレキシブル基板は、各種電子機器の表面近くに設置され、静電気を帯びた人の指によって操作されるので、静電気が侵入し易く、ノイズとして各種電気機器に誤動作を生じさせる恐れがあるからである。   By the way, the electrostatic intrusion prevention structure is particularly suitable for use on a flexible substrate having a switch formed on the surface thereof. Because this type of flexible board is installed near the surface of various electronic devices and is operated by the fingers of static electricity, it is easy for static electricity to enter and may cause malfunctions in various electrical devices as noise. Because there is.

しかしながら上記フレキシブル基板の上面や外装ケースの内面にアルミ箔を貼り付ける方法の場合、アルミ箔及び接着剤の層の厚み分(約50μm)だけ、その厚みが厚くなってしまい、その薄型化が阻害されるという問題があった。またアルミ箔をフレキシブル基板や外装ケースに貼り付ける作業が必要となるので、アルミ箔の材料費と合わせてコストアップになるという問題もあった。さらにフレキシブル基板にアルミ箔を貼り付けた場合は、フレキシブル基板に設けたスイッチを操作する際にアルミ箔によってスイッチの操作感覚が重くなってしまうという問題もあった。
実開平2−141931号公報
However, in the case of the method of attaching aluminum foil to the upper surface of the flexible substrate or the inner surface of the outer case, the thickness is increased by the thickness of the aluminum foil and the adhesive layer (about 50 μm), and the reduction in thickness is impeded. There was a problem of being. Further, since it is necessary to affix the aluminum foil on the flexible substrate or the outer case, there is a problem that the cost is increased together with the material cost of the aluminum foil. Furthermore, when aluminum foil is affixed to the flexible substrate, there is also a problem that when the switch provided on the flexible substrate is operated, the feeling of operation of the switch becomes heavy due to the aluminum foil.
Japanese Utility Model Publication No. 2-141931

本発明は上述の点に鑑みてなされたものでありその目的は、基板に設けた各種回路パターンに静電気が侵入するのを防止することができ、且つその薄型化、軽量化、低コスト化を図ることができる基板への静電気侵入防止構造を提供することにある。   The present invention has been made in view of the above points, and its purpose is to prevent static electricity from entering various circuit patterns provided on a substrate, and to reduce the thickness, weight, and cost thereof. An object of the present invention is to provide a structure for preventing electrostatic intrusion into a substrate that can be achieved.

本願の請求項1に記載の発明は、上面に各種回路パターンを設けた基板を、導電性を有する部材からなる取付部材上に載置し、且つこの基板の上面を静電気侵入防止用の絶縁シートで覆い、前記取付部材に設けた静電気集電用突起部を前記基板に設けた貫通部内と、この貫通部に対向する位置にある前記絶縁シートに設けた貫通部内とに同時に挿入することで、静電気集電用突起部を絶縁シートの上面側に露出させたことを特徴とする基板への静電気侵入防止構造にある。 According to a first aspect of this application, a substrate provided with various circuit patterns on the upper surface, is placed on the mounting member made of a member having conductivity, and the upper surface of the substrate in anti-static penetration insulating sheet in covering, with the through portion of the electrostatic collector projections provided on the mounting member provided on the substrate, by inserting simultaneously a through portion provided in the insulating sheet in a position facing the through portion, In the structure for preventing electrostatic intrusion into the substrate, the protrusion for electrostatic current collection is exposed on the upper surface side of the insulating sheet .

本願の請求項2に記載の発明は、前記基板は反転板を取り付けることでスイッチを構成してなるフレキシブル基板であり、且つ前記静電気集電用突起部及び前記基板と絶縁シートに設けられる貫通部は、前記スイッチの周囲に配置されていることを特徴とする請求項1に記載の基板への静電気侵入防止構造にある。 The invention according to claim 2 of the present application is a flexible substrate in which the substrate is configured as a switch by attaching an inversion plate, and the electrostatic current collecting projection and the through-hole provided in the substrate and the insulating sheet 2. The structure for preventing electrostatic intrusion into a substrate according to claim 1 , wherein the structure is disposed around the switch.

本願の請求項1に記載の発明によれば、基板の上面側に設けた各種回路パターンの上を覆う静電気侵入防止用の絶縁シートの上方から侵入してきた静電気は直接基板表面に侵入することを絶縁シートによって妨害され、絶縁シート上に沿ってより侵入し易い静電気集電用突起部に導かれ、取付部材に落とすことができる。従って基板上の各種回路パターンへ静電気が侵入することを防ぐことができる。絶縁シートは基板の上面側に静電気の侵入を防止したい各種回路パターンが形成されている場合に取り付ければ良く、基板の裏面側(取付部材側)に静電気の侵入を防止したい各種回路パターンが形成されている場合は基板自体が絶縁シートの役目を果たすので、必ずしも必要ない(もちろんその場合も絶縁シートを貼り付けても良い)。この発明の場合、絶縁シートを貼り付ける分、その厚みが増大するが、この静電気侵入防止構造は静電気集電用突起部を設けることで、本来静電気の基板への侵入を効果的に防止しているので、絶縁シートの厚みを厚くする必要はなく、従来のアルミ箔の場合に比べてその厚みを薄くすることができ、軽量化も図れるAccording to the invention described in claim 1 of the present application, the static electricity that has penetrated from the upper insulating sheet for preventing covering cormorants static electricity intruding on the various circuit patterns provided on the upper surface side of the substrate entering directly the substrate surface This is hindered by the insulating sheet, and is guided to the electrostatic current collecting projections that are more likely to invade along the insulating sheet, and can be dropped onto the mounting member. Therefore, it is possible to prevent static electricity from entering various circuit patterns on the substrate. The insulating sheet may be attached when various circuit patterns that prevent the entry of static electricity are formed on the top surface of the substrate, and various circuit patterns that prevent the entry of static electricity are formed on the back side (mounting member side) of the substrate. In such a case, the substrate itself serves as an insulating sheet, so that it is not always necessary (of course, the insulating sheet may also be attached). In the case of this invention, the thickness of the insulating sheet is increased by attaching the insulating sheet. This static electricity intrusion prevention structure effectively prevents the entry of static electricity into the substrate by providing the electrostatic current collecting projections. Therefore, it is not necessary to increase the thickness of the insulating sheet, the thickness can be reduced as compared with the case of the conventional aluminum foil , and the weight can be reduced .

本願の請求項2に記載の発明によれば、静電気集電用突起部をスイッチの周囲に配置したので、スイッチへの静電気の侵入を効果的に防止することができる。スイッチの部分には直接又は間接に静電気を帯びた指等から静電気が侵入し易いので、本発明を適用して特に効果的である。 According to the invention described in claim 2 of the present application, since the electrostatic current collecting projection is arranged around the switch, it is possible to effectively prevent the static electricity from entering the switch. Since the static electricity easily enters the switch portion directly or indirectly from a finger or the like charged with static electricity, the present invention is particularly effective.

以下、本発明の実施の形態を図面に基づいて詳細に説明する。
図1は本発明の第一の実施の形態にかかる基板への静電気侵入防止構造を用いて構成した押圧型スイッチ板1の分解斜視図である。同図に示すようにこの押圧型スイッチ板1は、取付部材(以下この実施の形態では「取付板」という)60の上に、スイッチ51を設けた基板(以下この実施の形態では「フレキシブル基板」という)50と、絶縁シート40と、連結部材30と、操作つまみ20,25と、ケース10と、銘板100とを取り付けて構成されている。以下各構成部品について説明する。
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an exploded perspective view of a press-type switch board 1 configured using a structure for preventing electrostatic intrusion into a substrate according to a first embodiment of the present invention. As shown in the figure, this press-type switch board 1 includes a board (hereinafter referred to as a “flexible board” in this embodiment) provided with a switch 51 on a mounting member (hereinafter referred to as “mounting board” in this embodiment) 60. 50 ”, the insulating sheet 40, the connecting member 30, the operation knobs 20 and 25, the case 10, and the name plate 100. Each component will be described below.

銘板100は絶縁性の合成樹脂フイルム(例えばポリカーボネートフイルム)製のシートの内部の所定位置にそれぞれ円形の開口101,103,103を設けて構成されている。銘板100の表面には図示はしないが所望の加飾印刷が施されている。   The nameplate 100 is formed by providing circular openings 101, 103, 103 at predetermined positions inside a sheet made of an insulating synthetic resin film (for example, polycarbonate film). Although not shown in the drawing, the surface of the nameplate 100 is subjected to desired decorative printing.

図2はケース10と操作つまみ20,25と連結部材30をその下面側から見た分解斜視図である。図1及び図2に示すように、ケース10は合成樹脂(例えばABS樹脂)を平板状に成形して構成され、その内部に開口12を設けている。ケース10の下面の外周には、6つの突起状の固定部11が設けられ、また、ケース10の下面の開口12の周囲には等間隔に4つの突起状の固定部13が設けられている。さらにケース10には、ケース10を切り抜いて形成され、その一部が接続部14aとしてケース10に接続された押圧片14が2つ設けられている。そして押圧片14の下面から柱状の押圧部15が突出している。   FIG. 2 is an exploded perspective view of the case 10, the operation knobs 20 and 25, and the connecting member 30 as viewed from the lower surface side. As shown in FIGS. 1 and 2, the case 10 is formed by molding a synthetic resin (for example, ABS resin) into a flat plate shape, and an opening 12 is provided therein. Six protrusion-shaped fixing portions 11 are provided on the outer periphery of the lower surface of the case 10, and four protrusion-shaped fixing portions 13 are provided at equal intervals around the opening 12 on the lower surface of the case 10. . Further, the case 10 is provided with two pressing pieces 14 which are formed by cutting out the case 10 and a part of which is connected to the case 10 as a connecting portion 14a. A columnar pressing portion 15 protrudes from the lower surface of the pressing piece 14.

操作つまみ20は、合成樹脂(例えばABS樹脂)製でその外形が前記開口12に収まる形状であり、上面に操作の種類等を表示した指示部23を4つ設け、下面の指示部23に対向する位置に柱状の押圧部22を突出させている。また操作つまみ20の下面には、連結部材30に固定される固定部21が設けられ、中央には操作つまみ25が収まる開口24が設けられている。一方操作つまみ25は合成樹脂(例えばABS樹脂)製で、その上面に指示部28が設けられると共に、下面中央から柱状の押圧部26を突出させている。さらに操作つまみ25の下面には連結部材30に固定される固定部27が4つ設けられている。   The operation knob 20 is made of a synthetic resin (for example, ABS resin) and has an outer shape that fits in the opening 12. The operation knob 20 is provided with four instruction units 23 indicating the type of operation on the upper surface, and faces the instruction unit 23 on the lower surface. A columnar pressing portion 22 is protruded at a position to perform. A fixing portion 21 that is fixed to the connecting member 30 is provided on the lower surface of the operation knob 20, and an opening 24 in which the operation knob 25 is accommodated is provided in the center. On the other hand, the operation knob 25 is made of synthetic resin (for example, ABS resin), and an instruction portion 28 is provided on the upper surface thereof, and a columnar pressing portion 26 is projected from the center of the lower surface. Further, four fixing portions 27 that are fixed to the connecting member 30 are provided on the lower surface of the operation knob 25.

連結部材30は可撓性のある合成樹脂フイルム(例えばポリエチレンテレフタレートフイルム、以下「PETフイルム」という)で形成され、中心部から十字方向に突出するように形成された四本のアーム部30aの各先端部に、前記ケース10の固定部13が貫通する孔31を設け、孔31よりも内側に操作つまみ20の固定部21が貫通する孔35を設け、さらにその内側に操作つまみ25の固定部27が貫通する孔34を設けている。また、連結部材30の中心部には操作つまみ25の押圧部26が貫通する孔33を設けている。また隣り合うアーム部30a同士を連結している連結部30bの途中には、押圧部22が貫通する孔32が設けられている。   The connecting member 30 is formed of a flexible synthetic resin film (for example, polyethylene terephthalate film, hereinafter referred to as “PET film”), and each of the four arm portions 30a formed so as to protrude in the cross direction from the center portion. A hole 31 through which the fixing portion 13 of the case 10 passes is provided at the tip, a hole 35 through which the fixing portion 21 of the operation knob 20 passes is provided inside the hole 31, and a fixing portion of the operation knob 25 is further provided inside the hole 35. A hole 34 through which 27 penetrates is provided. Further, a hole 33 through which the pressing portion 26 of the operation knob 25 passes is provided at the center of the connecting member 30. A hole 32 through which the pressing portion 22 passes is provided in the middle of the connecting portion 30b that connects the adjacent arm portions 30a.

絶縁シート40は、可撓性を有する絶縁性の合成樹脂製のフィルム(例えばPETフィルム)を下記するフレキシブル基板50と略同一の外形にカットしたものであり、フレキシブル基板50の上面を略覆う形状に形成されている。また、その裏面には接着層43が設けられている。また前記ケース10の各固定部11に対向する位置には貫通孔41が設けられている。さらに下記するフレキシブル基板50に設けた各貫通部54に対向する位置には貫通孔からなる貫通部42が設けられている。   The insulating sheet 40 is formed by cutting an insulating synthetic resin film having flexibility (for example, a PET film) into a shape substantially the same as that of the flexible substrate 50 described below and substantially covering the upper surface of the flexible substrate 50. Is formed. An adhesive layer 43 is provided on the back surface. A through hole 41 is provided at a position of the case 10 facing each fixed portion 11. Further, a through portion 42 formed of a through hole is provided at a position facing each through portion 54 provided on the flexible substrate 50 described below.

次にフレキシブル基板50は、可撓性のある絶縁性の合成樹脂製のフィルム(例えばPETフイルム)をケース10の外形形状と略同一の外形形状にカットしたものの上に回路パターン(図示せず)を形成して構成されている。そして前記ケース10下面の各押圧部15及び操作つまみ20,25の各押圧部22,26に対向する位置に、スイッチ51を設けている。スイッチ51は、図4(スイッチ51部分の断面を示している)に示すように、フレキシブル基板50のスイッチ51の中央に形成したスイッチパターン55及びスイッチパターン55の周囲にリング状に形成したスイッチパターン56(何れも回路パターンの一部を構成している)と、フレキシブル基板50上に載置されその外周が前記スイッチパターン56に接続するドーム形状の弾性金属板からなる反転板(以下この実施の形態において「可動接点板」という)52とによって構成されている。図1に戻って、フレキシブル基板50の前記ケース10の固定部11に対向する位置にはそれぞれ貫通孔53が設けられている。さらにフレキシブル基板50の各スイッチ51の周囲には、貫通孔からなる貫通部54が設けられている。   Next, the flexible substrate 50 is a circuit pattern (not shown) on a flexible insulating synthetic resin film (for example, PET film) cut into an outer shape substantially the same as the outer shape of the case 10. Is formed. And the switch 51 is provided in the position facing each press part 15 of the said case 10 and each press part 22 and 26 of the operation knobs 20 and 25. As shown in FIG. The switch 51 includes a switch pattern 55 formed at the center of the switch 51 on the flexible substrate 50 and a switch pattern formed in a ring shape around the switch pattern 55 as shown in FIG. 56 (all of which constitute a part of the circuit pattern) and a reversal plate (hereinafter referred to as this embodiment) made of a dome-shaped elastic metal plate placed on the flexible substrate 50 and having an outer periphery connected to the switch pattern 56. 52 in the form of “movable contact plate”. Returning to FIG. 1, through holes 53 are provided at positions of the flexible substrate 50 facing the fixing portion 11 of the case 10. Further, a through portion 54 formed of a through hole is provided around each switch 51 of the flexible substrate 50.

取付板60は、ステンレス等の金属製の硬質平板を、ケース10と略同一の外形形状に形成し、且つその上面の前記各貫通部54に対向する位置に、取付板60を上方向に***させてなる静電気集電用突起部61を設けて構成されている。静電気集電用突起部61の高さはこの実施の形態においては、絶縁シート40とフレキシブル基板50とを取付板60上に積層して取り付けた際に、静電気集電用突起部61の先端部が絶縁シート40の上面とほぼ同じ高さになるか、貫通孔42から僅かに突出する高さとしている。さらに取付板60には、前記ケース10の各固定部11に対向する位置に貫通孔62を設けている。   The mounting plate 60 is formed of a metal hard flat plate such as stainless steel in a shape substantially the same as that of the case 10, and the mounting plate 60 is raised upward at a position facing the through portions 54 on the upper surface thereof. An electrostatic current collecting protrusion 61 is provided. In this embodiment, the height of the electrostatic current collecting projection 61 is the tip of the electrostatic current collecting projection 61 when the insulating sheet 40 and the flexible substrate 50 are stacked on the mounting plate 60 and attached. Is approximately the same height as the upper surface of the insulating sheet 40 or slightly protrudes from the through hole 42. Further, the mounting plate 60 is provided with through holes 62 at positions facing the respective fixing portions 11 of the case 10.

この押圧型スイッチ板1を組み立てるには、まず操作つまみ20の固定部21と操作つまみ25の固定部27とをそれぞれ連結部材30の孔35,34に挿通し、その先端を熱カシメすることで、これらを一体に固定する。次にケース10の固定部13を連結部材30の孔31に挿通してその先端を熱カシメして固定することで両操作つまみ20,25をケース10に連結して固定する。   In order to assemble the press-type switch plate 1, first, the fixing portion 21 of the operation knob 20 and the fixing portion 27 of the operation knob 25 are respectively inserted into the holes 35 and 34 of the connecting member 30, and the tips thereof are thermally crimped. , Fix these together. Next, the operation knobs 20 and 25 are connected and fixed to the case 10 by inserting the fixing portion 13 of the case 10 through the hole 31 of the connecting member 30 and fixing the tip by heat caulking.

一方フレキシブル基板50の上面(スイッチ51を設けた側の面)を覆うように、絶縁シート40をその裏面の接着層43によって密着させて貼り付ける。このときフレキシブル基板50の貫通孔53及び貫通部54と、絶縁シート40の貫通孔41及び貫通部42とがそれぞれ対向するように位置を合わせて貼り付ける。   On the other hand, the insulating sheet 40 is adhered and adhered by the adhesive layer 43 on the back surface thereof so as to cover the upper surface of the flexible substrate 50 (the surface on which the switch 51 is provided). At this time, the through hole 53 and the through part 54 of the flexible substrate 50 and the through hole 41 and the through part 42 of the insulating sheet 40 are attached so as to face each other.

そして操作つまみ20,25を取り付けた前記ケース10の下側に前記絶縁シート40を貼り付けたフレキシブル基板50を配置し、その際ケース10の固定部11を、絶縁シート40の貫通孔41とフレキシブル基板50の貫通孔53に挿通する。そしてフレキシブル基板50の下側に取付板60を配置し、その際ケース10の固定部11を取付板60の貫通孔62に挿通する。このとき同時に、取付板60に設けた各静電気集電用突起部61がフレキシブル基板50の各貫通部54と絶縁シート40の各貫通部41とに挿入される。そしてこの状態のまま固定部11の先端部を熱カシメすることでケース10と絶縁シート40とフレキシブル基板50と取付板60とを一体に固定する。そして前記ケース10の上面に銘板100を貼り付ければ、押圧型スイッチ板1が完成する。   Then, the flexible substrate 50 with the insulating sheet 40 attached is disposed below the case 10 to which the operation knobs 20 and 25 are attached. At this time, the fixing portion 11 of the case 10 is flexible with the through hole 41 of the insulating sheet 40. The through hole 53 of the substrate 50 is inserted. Then, the mounting plate 60 is disposed below the flexible substrate 50, and the fixing portion 11 of the case 10 is inserted into the through hole 62 of the mounting plate 60 at that time. At the same time, the electrostatic current collecting projections 61 provided on the mounting plate 60 are inserted into the through portions 54 of the flexible substrate 50 and the through portions 41 of the insulating sheet 40. In this state, the case 10, the insulating sheet 40, the flexible substrate 50, and the mounting plate 60 are integrally fixed by heat caulking the tip of the fixing portion 11. And if the nameplate 100 is affixed on the upper surface of the said case 10, the press type switch board 1 will be completed.

図3は以上のようにして組み立てられた押圧型スイッチ板1の斜視図、図4はこの押圧型スイッチ板1の要部概略断面図(図3のA−A部分の概略断面図)である。図4に示すようにこの押圧型スイッチ板1は、スイッチ51の中央真上に操作つまみ25の押圧部26が位置している。また、取付板60の静電気集電用突起部61は、フレキシブル基板50に設けた貫通部54と絶縁シート40に設けた貫通部42を貫通して、その先端が絶縁シート40の上面側に露出している。なお取付板60はその何れかの部分でアースされている。   FIG. 3 is a perspective view of the press-type switch board 1 assembled as described above, and FIG. 4 is a schematic cross-sectional view of the main part of the press-type switch board 1 (schematic cross-sectional view of the AA portion in FIG. 3). . As shown in FIG. 4, the pressing switch plate 1 has the pressing portion 26 of the operation knob 25 positioned right above the center of the switch 51. Further, the electrostatic current collecting projection 61 of the mounting plate 60 penetrates the through part 54 provided in the flexible substrate 50 and the through part 42 provided in the insulating sheet 40, and the tip thereof is exposed on the upper surface side of the insulating sheet 40. is doing. The mounting plate 60 is grounded at any part thereof.

そして例えば図3に示す操作つまみ20の何れかの指示部23の部分を押圧すれば、図1,図2に示す連結部材30が撓むことで操作つまみ20の押圧した部分が下降し、その真下の押圧部22がこれに対向する可動接点板52を押圧して反転させスイッチ51をオンする。操作つまみ20への押圧を解除すれば可動接点板52の弾性復帰力によって操作つまみ20は元の位置に自動復帰しスイッチ51はオフする。操作つまみ25の指示部28を押圧したときも同様に、その真下の押圧部26がこれに対向する可動接点板52を押圧することで、スイッチ51がオンする。また、ケース10と一体に形成された押圧片14を押圧したときも、接続部14aが撓むことで押圧片14が下降し、その真下の押圧部15が対向する可動接点板52を押圧してスイッチ51をオンする。   Then, for example, if any one of the indicating portions 23 of the operation knob 20 shown in FIG. 3 is pressed, the connecting member 30 shown in FIGS. 1 and 2 is bent, and the pressed portion of the operation knob 20 is lowered. The pressing unit 22 directly below presses and reverses the movable contact plate 52 opposed thereto, and turns on the switch 51. When the pressure on the operation knob 20 is released, the operation knob 20 is automatically returned to the original position by the elastic return force of the movable contact plate 52, and the switch 51 is turned off. Similarly, when the instruction section 28 of the operation knob 25 is pressed, the pressing section 26 immediately below the pressing section 26 presses the movable contact plate 52 facing the switch 51 to turn on. Also, when the pressing piece 14 formed integrally with the case 10 is pressed, the pressing piece 14 descends due to the bending of the connecting portion 14a, and the pressing portion 15 directly below the pressing piece 15 presses the opposing movable contact plate 52. To turn on the switch 51.

一方押圧型スイッチ板1を操作等している際に、操作している人の指等を通して押圧型スイッチ板1の表面側から内部に静電気が入り込み、スイッチパターン55,56やその他の回路パターンに入射しようとする場合がある。ところがこの押圧型スイッチ板1において、例えば外部からスイッチ51に向けて入射してくる静電気はその入射を絶縁シート40によって遮られ、同時にスイッチ51の近傍に設置され且つ絶縁シート40上に露出してアースされている静電気集電用突起部61があるので、結局前記静電気は絶縁シート40の上面を伝って最も近くにある静電気集電用突起部61の先端へ入射し、アースされる。このようにこの押圧形スイッチ板1においては、絶縁シート40によってスイッチパターン等の各種回路パターンに直接静電気が侵入するのを困難とし、同時にその近くに静電気が侵入し易い静電気集電用突起部61を設けたので、静電気の通過経路が形成され、フレキシブル基板50上の各種回路パターンに静電気が侵入して電気回路が誤動作等を起こすことを防ぐことができる。   On the other hand, when the pressing switch board 1 is operated, static electricity enters from the surface side of the pressing switch board 1 through the finger of the operating person, and the like, and the switch patterns 55 and 56 and other circuit patterns are applied. There is a case to try to enter. However, in this push-type switch plate 1, for example, static electricity incident from the outside toward the switch 51 is blocked by the insulating sheet 40, and is simultaneously installed in the vicinity of the switch 51 and exposed on the insulating sheet 40. Since there is a grounded electrostatic current collecting projection 61, the static electricity eventually enters the tip of the nearest electrostatic current collecting projection 61 along the upper surface of the insulating sheet 40 and is grounded. As described above, in the push-type switch plate 1, it is difficult for static electricity to directly enter various circuit patterns such as the switch pattern by the insulating sheet 40, and at the same time, the electrostatic current collecting projection 61 that easily invades static electricity. Therefore, it is possible to prevent static electricity from entering the various circuit patterns on the flexible substrate 50 and causing the electric circuit to malfunction.

ところでこの押圧型スイッチ板1に用いた静電気侵入防止構造の場合、前記従来のフレキシブル基板にアルミ箔を貼り付ける構造の静電気侵入防止構造と比較して、アルミ箔に代えてフレキシブル基板50に絶縁シート40を貼り付けるだけなので、その厚みを薄くすることができ、静電気侵入防止構造の薄型化が図れる。その分押圧型スイッチ板1全体の厚みの薄型化が図れる。特に本実施の形態は、静電気集電用突起部61を絶縁シート40表面に露出させることで、絶縁シート40の表面に沿って静電気集電用突起部61に至る静電気の通り道を作っているので、静電気集電用突起部61を設けない場合に比べて絶縁シート40の厚みをかなり薄くしてもこれを通って静電気が侵入する恐れはない。この点からも絶縁シート40の厚みを薄くでき、静電気侵入防止構造の薄型化が図れる。さらに、絶縁シート40はアルミ箔等の金属層よりも軽量で容易に撓むので、絶縁シート40をフレキシブル基板50上に貼り付けたとしてもフレキシブル基板50に設けたスイッチ等の電気的動作部の操作時の動きが悪くなったり、重くなったりすることはなく、また絶縁シート40はアルミ箔よりも安価で、アルミ箔をフレキシブル基板に貼り付ける作業に比べて絶縁シート40を貼り付ける作業の方が容易なので、低コスト化を図ることができる。   By the way, in the case of the static electricity intrusion prevention structure used for this press-type switch board 1, compared with the static electricity penetration prevention structure of the structure which affixes aluminum foil to the said conventional flexible substrate, it replaces with aluminum foil and it is an insulating sheet on the flexible substrate 50 Since only 40 is affixed, the thickness can be reduced, and the static electricity intrusion prevention structure can be reduced in thickness. Accordingly, the thickness of the entire pressing switch board 1 can be reduced. In particular, in the present embodiment, since the electrostatic current collecting projection 61 is exposed on the surface of the insulating sheet 40, a path for static electricity reaching the electrostatic current collecting projection 61 along the surface of the insulating sheet 40 is created. Even if the thickness of the insulating sheet 40 is considerably reduced as compared with the case where the electrostatic current collecting projection 61 is not provided, there is no possibility that static electricity enters through the insulating sheet 40. Also from this point, the thickness of the insulating sheet 40 can be reduced, and the structure for preventing electrostatic intrusion can be reduced. Furthermore, since the insulating sheet 40 is lighter and more easily bent than a metal layer such as an aluminum foil, even if the insulating sheet 40 is affixed on the flexible substrate 50, an electrical operation unit such as a switch provided on the flexible substrate 50 The movement during operation does not become worse or heavier, and the insulating sheet 40 is cheaper than the aluminum foil, and the work of attaching the insulating sheet 40 compared to the work of attaching the aluminum foil to the flexible substrate Therefore, the cost can be reduced.

図5は本発明の第二の実施の形態を用いて構成した押圧型スイッチ板1−2の要部概略断面図(図3のA−A部分に相当する要部概略断面図)である。この押圧型スイッチ板1−2において前記押圧形スイッチ板1と共通する部分には同じ符号を付し、その詳細な説明は省略する。この押圧型スイッチ板1−2において前記押圧型スイッチ板1と相違する点は、フレキシブル基板70として二枚の合成樹脂製のフイルム71,72を重ね合わせたメンブレンスイッチを用いた点と、絶縁シート40を省略した点である。   FIG. 5 is a schematic cross-sectional view of a main part of a press-type switch plate 1-2 configured by using the second embodiment of the present invention (main part schematic cross-sectional view corresponding to the AA portion in FIG. 3). In this press-type switch board 1-2, the same code | symbol is attached | subjected to the part which is common in the said press-type switch board 1, and the detailed description is abbreviate | omitted. This press-type switch plate 1-2 differs from the press-type switch plate 1 in that a membrane switch in which two sheets of synthetic resin films 71 and 72 are overlapped is used as the flexible substrate 70, and an insulating sheet. 40 is omitted.

即ちこの実施の形態においては、それぞれ絶縁性の合成樹脂製のフイルム(例えばPETフイルム)71,72の表面にスイッチパターン75,76を形成するとともに、前記スイッチパターン75,76を囲む位置にその厚さがスイッチパターン75,76よりも厚い絶縁塗料製のスペーサ層73,74を形成し、これら2枚のフイルム71,72を、両スイッチパターン75,76が所定の隙間を持って対向するスイッチ77となるように重ね合わせてフレキシブル基板(メンブレンスイッチ)70を構成している。さらにフイルム71のスイッチパターン75を設けた部分の裏面側(上面側)には、押圧することで反転するドーム形状の弾性金属板からなる反転板(以下この実施の形態では「クリック板」という)80が載置されている。なおフイルム71,72に設ける他の各種回路パターンも両者の対向面側に設けられている。そして、フレキシブル基板70を構成する両フイルム71,72には前記フレキシブル基板50と同様に、静電気集電用突起部61を挿入する貫通孔からなる貫通部78が設けられ、この静電気集電用突起部61が貫通部78内に挿入されることで、静電気集電用突起部61の先端が上側のフイルム71の表面から露出している。なお静電気集電用突起部61は前記実施の形態と同じ場所、即ちスイッチ77の周囲に配置されている。   That is, in this embodiment, the switch patterns 75 and 76 are formed on the surfaces of insulating synthetic resin films (for example, PET films) 71 and 72, respectively, and the thicknesses are formed at positions surrounding the switch patterns 75 and 76. The spacer layers 73 and 74 made of an insulating paint are formed thicker than the switch patterns 75 and 76, and the two films 71 and 72 are opposed to the switch 77 with the switch patterns 75 and 76 facing each other with a predetermined gap. The flexible substrate (membrane switch) 70 is configured to overlap with each other. Further, on the back side (upper side) of the portion of the film 71 where the switch pattern 75 is provided, a reversing plate made of a dome-shaped elastic metal plate that is reversed by pressing (hereinafter referred to as “click plate” in this embodiment). 80 is placed. Various other circuit patterns provided on the films 71 and 72 are also provided on the facing surfaces of the two. Both the films 71 and 72 constituting the flexible substrate 70 are provided with a through-hole 78 including a through-hole into which the electrostatic current-collecting projection 61 is inserted in the same manner as the flexible substrate 50. By inserting the portion 61 into the through portion 78, the tip of the electrostatic current collecting projection 61 is exposed from the surface of the upper film 71. The electrostatic current collecting projection 61 is disposed in the same place as the above embodiment, that is, around the switch 77.

そして操作つまみ25の指示部28の部分を押圧すれば、その真下の押圧部26がこれに対向するクリック板80を押圧して反転する。これにより、クリック板80がスイッチ77を押圧してスイッチパターン75,76間を当接しオンする。操作つまみ25への押圧を解除すれば操作つまみ25は元の位置に自動復帰しスイッチ77はオフする。図示しない他の操作つまみ20や押圧片14を押圧した場合も同様に、フレキシブル基板70のこれらに対向する位置に設けたスイッチ77がオンする。   And if the part of the instruction | indication part 28 of the operation knob 25 is pressed, the press part 26 just under it will press the click board 80 which opposes this, and will reverse. As a result, the click plate 80 presses the switch 77 and abuts between the switch patterns 75 and 76 to turn on. When the pressure on the operation knob 25 is released, the operation knob 25 automatically returns to the original position and the switch 77 is turned off. Similarly, when the other operation knob 20 or the pressing piece 14 (not shown) is pressed, the switch 77 provided on the flexible substrate 70 at a position facing these is turned on.

一方押圧型スイッチ板1−2を操作等している際に、操作している人の指等を通して押圧型スイッチ板1−2の表面側から内部に静電気が入り込み、スイッチパターン75,76やその他の回路パターンに入射しようとする場合がある。ところがこの押圧型スイッチ板1−2において、例えば外部からスイッチパターン75,76に向けて入射してくる静電気はその入射を上側のフイルム71を構成する絶縁シート自体によって遮られ、同時にスイッチパターン75,76の近傍に設置され且つフイルム71の表面から露出してアースされている静電気集電用突起部61があるので、結局前記静電気はフイルム71の上面を伝って最も近くにある静電気集電用突起部61の先端へ入射し、アースされる。このようにこの押圧形スイッチ板1−2においては、上側のフイルム71自体によってスイッチパターン等の各種回路パターンに直接静電気が侵入するのを困難とし、同時にその近くに静電気が侵入し易い静電気集電用突起部61を設けたので、静電気の通過経路が形成され、フイルム71,72上の各種回路パターンに静電気が侵入して電気回路が誤動作等を起こすことを防ぐことができる。   On the other hand, when operating the press-type switch board 1-2, static electricity enters the inside from the surface side of the press-type switch board 1-2 through the finger of the operating person, etc., and the switch patterns 75, 76 and others May be incident on the circuit pattern. However, in this press-type switch board 1-2, for example, static electricity incident from the outside toward the switch patterns 75 and 76 is blocked by the insulating sheet itself constituting the upper film 71, and at the same time, the switch pattern 75, Since there is an electrostatic current collecting projection 61 that is installed in the vicinity of 76 and is exposed from the surface of the film 71 and is grounded, the static electricity is eventually passed through the upper surface of the film 71 and is closest to the electrostatic current collecting projection 61. The light enters the tip of the part 61 and is grounded. As described above, in the press-type switch plate 1-2, it is difficult for static electricity to directly enter various circuit patterns such as the switch pattern by the upper film 71 itself, and at the same time, static electricity current collector easily invades static electricity. Since the projection 61 is provided, a passage for static electricity is formed, and it is possible to prevent the static electricity from entering the various circuit patterns on the films 71 and 72 and causing the malfunction of the electric circuit.

この押圧型スイッチ板1−2に用いた静電気侵入防止構造の場合、フイルム71,72を二枚重ねるが、その代わりに前記実施の形態で用いた絶縁シート40を不要にすることができるので、前記実施の形態と同様にその厚みの薄型化が図れる。また従来のようにアルミ箔を貼り付けないので、スイッチ77等の電気的動作部の操作時の動きが悪くなったり、重くなったりすることはなく、また低コスト化を図ることもできる。   In the case of the static electricity intrusion prevention structure used for the press-type switch plate 1-2, two films 71 and 72 are stacked, but instead, the insulating sheet 40 used in the embodiment can be made unnecessary. Similar to the embodiment, the thickness can be reduced. Further, since the aluminum foil is not pasted as in the prior art, the movement of the electrical operation unit such as the switch 77 does not deteriorate or become heavy, and the cost can be reduced.

以上本発明の実施形態を説明したが、本発明は上記実施形態に限定されるものではなく、特許請求の範囲、及び明細書と図面に記載された技術的思想の範囲内において種々の変形が可能である。なお直接明細書及び図面に記載のない何れの形状・構造・材質であっても、本願発明の作用・効果を奏する以上、本願発明の技術的思想の範囲内である。例えば上記各実施の形態では静電気集電用突起部61をスイッチ51,77の周囲に配置した(これによってスイッチ51,77への静電気の侵入を効果的に防止できる)が、静電気集電用突起部61を設ける位置は、取付板60上面の他の位置であってもよく、また静電気集電用突起部61を設ける数も任意の数でよい。   Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible. It should be noted that any shape, structure, or material not directly described in the specification and drawings is within the scope of the technical idea of the present invention as long as the effects and advantages of the present invention are exhibited. For example, in each of the embodiments described above, the electrostatic current collecting projection 61 is disposed around the switches 51 and 77 (which can effectively prevent static electricity from entering the switches 51 and 77). The position where the portion 61 is provided may be another position on the top surface of the mounting plate 60, and the number of the electrostatic current collecting projections 61 may be any number.

また上記各実施の形態ではフレキシブル基板50,70や絶縁シート40に貫通孔からなる貫通部54,78,42を設けたが、貫通部54,78,42はフレキシブル基板50,70や絶縁シート40の外周辺から切り欠かれた貫通溝によって構成しても良い。また上記各実施の形態ではフレキシブル基板を用いたが、その代わりに硬質基板等の他の基板を用いて構成しても良い。   In each of the above embodiments, the flexible boards 50 and 70 and the insulating sheet 40 are provided with through portions 54, 78 and 42, which are through holes. You may comprise by the through-groove cut out from the outer periphery. In each of the above embodiments, a flexible substrate is used. Instead, another substrate such as a hard substrate may be used.

また上記各実施の形態では取付部材60を板状の取付板で構成したが、板状以外の形状・構造の取付部材であっても良い。また上記実施の形態では取付部材60を金属(導電材料)で構成することで導電性を持たせているが、合成樹脂等の絶縁部材の表面に導電層等を形成することで導電性を持たせる等することでもよい。要は導電性を有する部材で取付部材を構成すれば良い。   In each of the above embodiments, the attachment member 60 is configured by a plate-like attachment plate, but may be an attachment member having a shape / structure other than a plate-like shape. In the above embodiment, the mounting member 60 is made of metal (conductive material) to provide conductivity. However, the mounting member 60 has conductivity by forming a conductive layer or the like on the surface of an insulating member such as synthetic resin. It is also possible to make it. In short, the attachment member may be made of a conductive member.

本発明の第一の実施の形態を用いて構成した押圧型スイッチ板1の分解斜視図である。It is a disassembled perspective view of the press type switch board 1 comprised using 1st embodiment of this invention. ケース10と操作つまみ20,25と連結部材30とをその下面側から見た斜視図である。It is the perspective view which looked at the case 10, the operation knobs 20 and 25, and the connection member 30 from the lower surface side. 押圧型スイッチ板1の斜視図である。1 is a perspective view of a pressing switch plate 1. FIG. 押圧型スイッチ板1の要部概略断面図(図3のA−A線部分の概略断面図)である。It is a principal part schematic sectional drawing of the press type switch board 1 (schematic sectional drawing of the AA line part of FIG. 3). 本発明の第二の実施形態を用いて構成した押圧型スイッチ板1−2の要部概略断面図である。It is a principal part schematic sectional drawing of the press type switch board 1-2 comprised using 2nd embodiment of this invention.

符号の説明Explanation of symbols

1 押圧型スイッチ
10 ケース
20 操作つまみ
25 操作つまみ
30 連結部材
40 絶縁シート
41 貫通孔
42 貫通部
50 フレキシブル基板(スイッチ基板)
51 スイッチ
52 可動接点板(反転板)
53 貫通孔
54 貫通部
55,56 スイッチパターン
60 取付板
61 静電気集電用突起部
62 貫通孔
70 フレキシブル基板(メンブレンスイッチ)
71,72 フイルム
73,74 スペーサ層
75,76 スイッチパターン
77 スイッチ
78 貫通部
80 クリック板(反転板)
DESCRIPTION OF SYMBOLS 1 Push type switch 10 Case 20 Operation knob 25 Operation knob 30 Connecting member 40 Insulation sheet 41 Through-hole 42 Through-hole 50 Flexible substrate (switch substrate)
51 Switch 52 Movable contact plate (reversing plate)
53 Through-hole 54 Through-hole 55, 56 Switch pattern 60 Mounting plate 61 Protrusion for electrostatic current collection 62 Through-hole 70 Flexible substrate (membrane switch)
71, 72 Film 73, 74 Spacer layer 75, 76 Switch pattern 77 Switch 78 Through part 80 Click plate (reversing plate)

Claims (2)

上面に各種回路パターンを設けた基板を、導電性を有する部材からなる取付部材上に載置し、且つこの基板の上面を静電気侵入防止用の絶縁シートで覆い、
前記取付部材に設けた静電気集電用突起部を前記基板に設けた貫通部内と、この貫通部に対向する位置にある前記絶縁シートに設けた貫通部内とに同時に挿入することで、静電気集電用突起部を絶縁シートの上面側に露出させたことを特徴とする基板への静電気侵入防止構造。
A substrate provided with various circuit patterns on the upper surface is placed on a mounting member made of a conductive member, and the upper surface of the substrate is covered with an insulating sheet for preventing electrostatic intrusion,
By simultaneously inserting the electrostatic current collecting projection provided on the mounting member into the through part provided on the substrate and the through part provided on the insulating sheet at a position facing the through part. A structure for preventing electrostatic intrusion into a substrate, characterized in that the protrusions for use are exposed on the upper surface side of the insulating sheet .
前記基板は反転板を取り付けることでスイッチを構成してなるフレキシブル基板であり、
且つ前記静電気集電用突起部及び前記基板と絶縁シートに設けられる貫通部は、前記スイッチの周囲に配置されていることを特徴とする請求項1に記載の基板への静電気侵入防止構造。
The substrate is a flexible substrate configured by forming a switch by attaching a reversal plate,
2. The structure for preventing electrostatic intrusion into a substrate according to claim 1 , wherein the electrostatic current collecting projection and the through portion provided in the substrate and the insulating sheet are arranged around the switch.
JP2003363052A 2003-10-23 2003-10-23 Structure to prevent static electricity from entering the board Expired - Fee Related JP4245454B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003363052A JP4245454B2 (en) 2003-10-23 2003-10-23 Structure to prevent static electricity from entering the board

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003363052A JP4245454B2 (en) 2003-10-23 2003-10-23 Structure to prevent static electricity from entering the board

Publications (2)

Publication Number Publication Date
JP2005129333A JP2005129333A (en) 2005-05-19
JP4245454B2 true JP4245454B2 (en) 2009-03-25

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003363052A Expired - Fee Related JP4245454B2 (en) 2003-10-23 2003-10-23 Structure to prevent static electricity from entering the board

Country Status (1)

Country Link
JP (1) JP4245454B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007141500A (en) * 2005-11-15 2007-06-07 Teikoku Tsushin Kogyo Co Ltd Electron part with adhesive sheet and attaching structure to its case

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