JP4381238B2 - Electrostatic intrusion prevention mechanism for electronic equipment - Google Patents

Electrostatic intrusion prevention mechanism for electronic equipment Download PDF

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JP4381238B2
JP4381238B2 JP2004185839A JP2004185839A JP4381238B2 JP 4381238 B2 JP4381238 B2 JP 4381238B2 JP 2004185839 A JP2004185839 A JP 2004185839A JP 2004185839 A JP2004185839 A JP 2004185839A JP 4381238 B2 JP4381238 B2 JP 4381238B2
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circuit board
intrusion prevention
pattern
mounting plate
case
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JP2006012514A (en
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吉晴 塚原
真也 齋藤
信幸 菊地
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帝国通信工業株式会社
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Description

本発明は、回路基板の上部に設置したケース側から侵入してくる静電気が前記回路基板に侵入するのを防止する電子機器の静電気侵入防止機構に関するものである。   The present invention relates to a static electricity intrusion prevention mechanism for an electronic device that prevents static electricity entering from a case side installed on an upper part of a circuit board from entering the circuit board.

従来、電子機器の中には、ケースの上側に設置した各種操作ボタンを操作することで、ケースの下側に設置した回路基板上の各種接点の切り替えなどを行う構造のものがある。   2. Description of the Related Art Conventionally, some electronic devices have a structure in which various contacts on a circuit board installed on the lower side of a case are switched by operating various operation buttons installed on the upper side of the case.

図7はこの種の電子機器300の一例を示す斜視図である。また図8は電子機器300の分解斜視図である。両図に示すようにこの電子機器300は、金属板製の取付板310の上に、静電気侵入防止基板380を載置したフレキシブル回路基板330を載せ、さらにその上を合成樹脂製のケース350で覆い、ケース350の下面から突出する図示しない突起を、静電気侵入防止基板380及びフレキシブル回路基板330に設けた***337,389と、取付板310に設けた***311に挿入し、その先端を取付板310の下面で熱カシメすることによって構成されている。ケース350上には回転つまみ360と押釦つまみ370とが設置されており、回転つまみ360を回動することでフレキシブル回路基板330のロータリースイッチ用接点パターン331の出力が変化し、また押釦つまみ370を押圧することで静電気侵入防止基板380上に設置した反転板395を反転してその下に設置したメンブレンスイッチをオンする。   FIG. 7 is a perspective view showing an example of this type of electronic apparatus 300. FIG. 8 is an exploded perspective view of the electronic device 300. As shown in both figures, in this electronic apparatus 300, a flexible circuit board 330 on which an electrostatic intrusion prevention board 380 is placed is placed on a metal plate mounting plate 310, and a synthetic resin case 350 is placed thereon. A projection (not shown) that covers and protrudes from the lower surface of the case 350 is inserted into the small holes 337 and 389 provided in the static electricity intrusion prevention substrate 380 and the flexible circuit board 330 and the small holes 311 provided in the attachment plate 310, and the tip thereof is attached It is configured by caulking with heat on the lower surface of 310. A rotary knob 360 and a push button knob 370 are installed on the case 350. By rotating the rotary knob 360, the output of the rotary switch contact pattern 331 of the flexible circuit board 330 is changed. By pressing, the reverse plate 395 installed on the static electricity intrusion prevention substrate 380 is reversed and the membrane switch installed thereunder is turned on.

ここでこの電子機器300においては、フレキシブル回路基板330へのケース350側からの静電気の侵入を防止するため、前述のように静電気侵入防止基板380を載置している。静電気侵入防止基板380は、図9に示すように、その一側辺がフレキシブル回路基板330の一側辺と複数の連結部381によって連結されている。なお静電気侵入防止基板380にはフレキシブル回路基板330のロータリースイッチ用接点パターン331を露出する円形の開口383が設けられている。そしてフレキシブル回路基板330の裏面(ロータリースイッチ用接点パターン331を設けていない側の面)の略全面には導電塗料製の接続用パターン335が設けられ、また静電気侵入防止基板380の接続用パターン335と同一側の面にもその略全面に導電塗料製の静電防止用パターン385が設けられ、接続用パターン335と静電防止用パターン385は連結部381に設けた連結パターン387によって連結されている。そして図9に示す静電気侵入防止基板380の下面側にフレキシブル回路基板330を折り返して重ね合わせれば、図8に示す静電気侵入防止基板380を載置したフレキシブル回路基板330が構成される。   Here, in the electronic apparatus 300, the static electricity intrusion prevention substrate 380 is placed as described above in order to prevent the static electricity from entering the flexible circuit board 330 from the case 350 side. As shown in FIG. 9, one side of the static electricity intrusion prevention substrate 380 is connected to one side of the flexible circuit board 330 by a plurality of connecting portions 381. The electrostatic intrusion prevention board 380 is provided with a circular opening 383 for exposing the rotary switch contact pattern 331 of the flexible circuit board 330. A connection pattern 335 made of a conductive paint is provided on substantially the entire back surface of the flexible circuit board 330 (the surface on which the rotary switch contact pattern 331 is not provided), and the connection pattern 335 of the electrostatic intrusion prevention substrate 380 is provided. An antistatic pattern 385 made of a conductive paint is provided on substantially the same surface as the connection side, and the connection pattern 335 and the antistatic pattern 385 are connected by a connection pattern 387 provided in the connection portion 381. Yes. Then, when the flexible circuit board 330 is folded and overlapped on the lower surface side of the electrostatic intrusion prevention board 380 shown in FIG. 9, the flexible circuit board 330 on which the electrostatic intrusion prevention board 380 shown in FIG.

以上のようにして構成された電子機器300において、回転つまみ360や押釦つまみ370を人の指で操作すると、帯電している人の静電気が回転つまみ360の回転軸とケース350との間の隙間や、押釦つまみ370の外周とケース350との間の隙間からケースの下面側に侵入する場合があるが、この静電気はフレキシブル回路基板330の回路パターンに入射する前に、その上に設置した静電気侵入防止基板380の静電防止用パターン385に入射し、さらにこの静電気は接続用パターン335を介してこれと面接触している取付板310に導かれ、取付板310の所望の位置からアースされる。   In the electronic apparatus 300 configured as described above, when the rotary knob 360 and the push button knob 370 are operated with a human finger, the static electricity of a charged person is caused by a gap between the rotary shaft of the rotary knob 360 and the case 350. In some cases, the static electricity may enter the lower surface side of the case from the gap between the outer periphery of the pushbutton knob 370 and the case 350. This static electricity is applied to the circuit pattern of the flexible circuit board 330 before entering the circuit pattern. The incident light enters the antistatic pattern 385 of the intrusion prevention substrate 380, and the static electricity is guided to the mounting plate 310 that is in surface contact with the connection pattern 335 and grounded from a desired position on the mounting plate 310. The

しかしながら上記従来の静電気侵入防止機構には、以下のような問題点があった。
(1)接続用パターン335と取付板310間は面接触させることによってその接触抵抗値が小さくなるようにしてはいるが、上記電子機器300においては、ケース350と取付板310間の固定がケース350から突出する突起の熱カシメによって行われているので、必ずしもフレキシブル回路基板330の接続用パターン335と取付板310間の接触力が強いとは言えず、場合によっては両者間の導通が悪くなり、アースが不十分になる恐れがあった。
However, the conventional electrostatic intrusion prevention mechanism has the following problems.
(1) Although the contact resistance value is reduced by bringing the connection pattern 335 and the mounting plate 310 into surface contact with each other, in the electronic apparatus 300, the case 350 and the mounting plate 310 are fixed to each other. Since this is performed by thermal caulking of the protrusion protruding from 350, it cannot be said that the contact force between the connection pattern 335 of the flexible circuit board 330 and the mounting plate 310 is strong, and in some cases, the conduction between the two becomes poor. There was a risk that the earth would be insufficient.

(2)静電防止用パターン385と接続用パターン335間は、連結パターン387によって連結されているが、この連結パターン387の部分は180°折り曲げられているので、導電塗料製の連結パターン387にクラックが入る恐れがあり、そのような場合もアースが不十分になる恐れがあった。
実開平2−141931号公報
(2) The anti-static pattern 385 and the connection pattern 335 are connected by a connection pattern 387. Since the portion of the connection pattern 387 is bent by 180 °, the connection pattern 387 made of a conductive paint is used. There is a risk of cracks, and even in such a case, there is a risk of insufficient grounding.
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、構造が簡単で、確実なアースを行うことができる電子機器の静電気侵入防止機構を提供することにある。   The present invention has been made in view of the above points, and an object of the present invention is to provide a static electricity intrusion prevention mechanism for an electronic device that has a simple structure and can perform reliable grounding.

本願請求項1に記載の発明は、導電性を有する取付板上に回路基板を載置し、さらにこの回路基板をケースで覆ってなる構造の電子機器の静電気侵入防止機構において、前記回路基板上に、その上面に静電防止用パターンを設けた静電気侵入防止基板を載置し、さらに前記回路基板に設けた開口と静電気侵入防止基板に設けた開口とに前記取付板に設けた突起を挿入してその上面を静電気侵入防止基板の開口内に露出し、導電性を有する弾性部材をケースの下面と静電防止用パターン及び突起上面との間に挟持して前記突起上面と前記静電防止用パターンとに圧接接続することで、取付板と静電防止用パターンとを電気的に接続する接続機構を設け、これによってケース側から静電防止用パターンに侵入した静電気を取付板に導くことを特徴とする電子機器の静電気侵入防止機構にある。 According to the first aspect of the present invention, there is provided an electrostatic intrusion prevention mechanism for an electronic apparatus having a structure in which a circuit board is placed on a conductive mounting plate and the circuit board is covered with a case. In addition, an electrostatic intrusion prevention board having an antistatic pattern provided on its upper surface is placed, and a protrusion provided on the mounting plate is inserted into an opening provided in the circuit board and an opening provided in the electrostatic intrusion prevention board. The upper surface of the protrusion is exposed in the opening of the anti-static intrusion substrate, and a conductive elastic member is sandwiched between the lower surface of the case, the antistatic pattern and the upper surface of the protrusion, and the upper surface of the protrusion and the antistatic A connection mechanism that electrically connects the mounting plate and the antistatic pattern by pressure-connecting to the pattern is provided, thereby guiding the static electricity that has entered the antistatic pattern from the case side to the mounting plate. Features In static intrusion prevention mechanism of the electronic apparatus to be.

請求項1に記載の発明によれば、取付板に設けた突起を、静電気侵入防止基板の静電防止用パターンに電気的に接続する接続機構を設けたので、ケースの上面側から下面側に侵入した静電気は、回路基板の回路パターンに入射する前に、その上に設置した静電防止用パターンに入射し、さらにこの静電気は前記接続機構によって確実に取付板に導かれ、取付板の所望の位置からアースすることができる。   According to the first aspect of the present invention, since the connection mechanism for electrically connecting the protrusion provided on the mounting plate to the antistatic pattern of the antistatic intrusion board is provided, the upper surface side to the lower surface side of the case is provided. The intruding static electricity enters the antistatic pattern installed on the circuit board before entering the circuit pattern on the circuit board. Further, the static electricity is reliably guided to the mounting plate by the connection mechanism, and the mounting plate is desired. It can be grounded from the position.

また請求項1に記載の発明によれば、導電性を有する弾性部材を同時に取付板の突起と静電防止用パターンとに圧接接続することで、取付板と静電防止用パターンとを電気的に接続したので、つまり弾性部材による圧接なので、たえず均一の力で取付板の突起と静電防止用パターンとを接続することができ、環境ストレスによる部材の変形が起こってもその電気的接続を確実に行え、確実な取付板への導通が図れ、確実なアースが行える。 According to the first aspect of the present invention, the mounting plate and the antistatic pattern are electrically connected by simultaneously press-connecting the conductive elastic member to the protrusion of the mounting plate and the antistatic pattern. In other words, because it is a pressure contact with an elastic member, it is possible to connect the protrusion of the mounting plate and the antistatic pattern with a uniform force, and even if the member is deformed due to environmental stress, the electrical connection can be made. It can be done reliably, can be reliably connected to the mounting plate, and can be reliably grounded.

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。
図1は本発明の第一実施形態を適用してなる電子機器1の分解斜視図である。同図に示すようにこの電子機器1は、取付板10上に、一枚の基板上に構成された回路基板20と静電気侵入防止基板50とを積層したものを載置し、さらにその上に回転つまみ127と押釦つまみ135とを取り付けたケース80を載置し、これによって取付板10上の回路基板20と静電気侵入防止基板50とをケース80によって覆って構成されている。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 an electronic apparatus 1 to which the first embodiment of the present invention is applied. As shown in the figure, the electronic apparatus 1 has a mounting board 10 on which a circuit board 20 configured on a single board and a static electricity intrusion prevention board 50 are stacked, and further thereon. The case 80 to which the rotary knob 127 and the push button knob 135 are attached is placed, and thereby the circuit board 20 and the static electricity intrusion prevention board 50 on the attachment plate 10 are covered with the case 80. Each component will be described below.

取付板10は硬質の金属板を略矩形状に形成して構成されており、その所定位置には複数の小孔からなる取付部11が設けられている。また取付板10の一辺近傍の所定位置には上方向に略矩形状に凸となるように取付板10を湾曲変形させてなる突起13が設けられている。突起13の上面13aはこの実施形態では略平面状に形成されている。   The mounting plate 10 is formed by forming a hard metal plate in a substantially rectangular shape, and mounting portions 11 made up of a plurality of small holes are provided at predetermined positions. Further, a projection 13 is provided at a predetermined position near one side of the mounting plate 10, which is formed by bending and deforming the mounting plate 10 so as to protrude upward in a substantially rectangular shape. In this embodiment, the upper surface 13a of the protrusion 13 is formed in a substantially planar shape.

図2,図3はそれぞれ前記積層された回路基板20と静電気侵入防止基板50の展開斜視図であり、図2は回路基板20の上から静電気侵入防止基板50の積層を解除した状態(回路基板20の上面がケース80側を向く状態)を示しており、図3は回路基板20の上から静電気侵入防止基板50の積層を解除した状態の裏面(静電気侵入防止基板50の上面がケース80側を向く状態)を示している。両図に示すように、回路基板20と静電気侵入防止基板50とは一枚の矩形状の可撓性を有する合成樹脂製のフレキシブル基板15上に形成され、両者はフレキシブル基板15の中央に設けた直線状で破線状の貫通する折り曲げ溝17によって形成される複数の連結部19によって連結されている。   2 and 3 are exploded perspective views of the laminated circuit board 20 and the static intrusion prevention board 50, respectively. FIG. 2 shows a state in which the lamination of the static intrusion prevention board 50 is released from the top of the circuit board 20 (circuit board). 3 shows a state in which the upper surface of 20 faces the case 80 side, and FIG. The state of facing). As shown in both figures, the circuit board 20 and the static electricity intrusion prevention board 50 are formed on a single flexible flexible resin board 15 made of synthetic resin, and both are provided at the center of the flexible board 15. They are connected by a plurality of connecting portions 19 formed by bent grooves 17 penetrating in a straight line and broken line.

そして回路基板20は矩形状であり、その外周の一側辺からは、帯状の引出部30が引き出されている。回路基板20の上面の所定位置にはロータリースイッチ用接点パターン21と、メンブレンスイッチ用接点パターン27とが設けられている。ロータリースイッチ用接点パターン21は、その中央に設けた円形の開口41の周囲にリング状に設けられたコモンパターン23と、コモンパターン23の周囲にリング状で等間隔に複数設けたオンオフパターン25とを具備して構成されている。一方メンブレンスイッチ用接点パターン27は円形の接点パターンである。そして図示はしていないがロータリースイッチ用接点パターン21とメンブレンスイッチ用接点パターン27とからはそれぞれ回路パターンが引き出され、前記引出部30に導かれている。なおロータリースイッチ用接点パターン21とメンブレンスイッチ用接点パターン27以外の回路基板20の表面は、絶縁層によって覆われている。さらに回路基板20を前記取付板10に載置した際にその各取付部11に対向する位置にはそれぞれ貫通する小孔からなる挿入部43が設けられ、また回路基板20を前記取付板10に載置した際にその突起13に対向する位置にはこの突起13を挿入する寸法形状の矩形状の開口45が設けられている。   The circuit board 20 has a rectangular shape, and a strip-shaped lead portion 30 is drawn from one side of the outer periphery thereof. A rotary switch contact pattern 21 and a membrane switch contact pattern 27 are provided at predetermined positions on the upper surface of the circuit board 20. The contact pattern 21 for the rotary switch includes a common pattern 23 provided in a ring shape around a circular opening 41 provided in the center thereof, and a plurality of on / off patterns 25 provided in a ring shape around the common pattern 23 at equal intervals. It comprises. On the other hand, the membrane switch contact pattern 27 is a circular contact pattern. Although not shown, circuit patterns are drawn from the contact pattern 21 for the rotary switch and the contact pattern 27 for the membrane switch, respectively, and are led to the drawing portion 30. The surface of the circuit board 20 other than the rotary switch contact pattern 21 and the membrane switch contact pattern 27 is covered with an insulating layer. Further, when the circuit board 20 is placed on the mounting plate 10, insertion portions 43 each having a small through hole are provided at positions facing the respective mounting portions 11, and the circuit board 20 is mounted on the mounting plate 10. A rectangular opening 45 having a size and shape for inserting the protrusion 13 is provided at a position facing the protrusion 13 when placed.

一方静電気侵入防止基板50は前記回路基板20と略同一外形形状の矩形状であり、前記回路基板20に静電気侵入防止基板50を折り返して積層した際に前記回路基板20のロータリースイッチ用接点パターン21に対向する位置にはこのロータリースイッチ用接点パターン21全体を露出する円形の開口51が設けられ、また前記回路基板20を積層した際に前記回路基板20に設けた各挿入部43に対向する位置には貫通する小孔からなる挿入部53が設けられ、また前記回路基板20を積層した際に前記回路基板20の開口45に対向する位置にはこれと同一寸法形状の矩形状の開口55が設けられている。そしてこの静電気侵入防止基板50の上面には、そのほぼ全面にわたって、静電防止用パターン57が形成されている。静電防止用パターン57は銀ペーストなどの導電塗料を印刷(スクリーン印刷)することによって形成されているが、その他の方法、例えば金属箔の貼り付け、金属蒸着などによって形成してもよい。一方静電気侵入防止基板50の下面側の、前記回路基板20を積層した際に前記回路基板20のメンブレンスイッチ用接点パターン27に対向する位置には、これと同一形状寸法の円形のメンブレンスイッチ用接点パターン59が形成されている。そして図示はしていないがメンブレンスイッチ用接点パターン59からは回路パターンが引き出され、前記引出部30に導かれている。なお静電気侵入防止基板50の下面のメンブレンスイッチ用接点パターン59以外の表面は、絶縁層によって覆われている。   On the other hand, the electrostatic intrusion prevention board 50 has a rectangular shape having substantially the same outer shape as the circuit board 20, and when the electrostatic intrusion prevention board 50 is folded and laminated on the circuit board 20, the rotary switch contact pattern 21 of the circuit board 20. A circular opening 51 that exposes the entire rotary switch contact pattern 21 is provided at a position opposite to the rotary switch, and a position facing each insertion portion 43 provided in the circuit board 20 when the circuit board 20 is laminated. Is provided with an insertion portion 53 having a small through hole, and a rectangular opening 55 of the same size and shape is provided at a position facing the opening 45 of the circuit board 20 when the circuit board 20 is laminated. Is provided. An antistatic pattern 57 is formed on the upper surface of the antistatic intrusion prevention substrate 50 over almost the entire surface. The antistatic pattern 57 is formed by printing (screen printing) a conductive paint such as a silver paste, but may be formed by other methods such as attaching metal foil or metal deposition. On the other hand, when the circuit board 20 is stacked on the lower surface side of the static electricity intrusion prevention board 50, a circular membrane switch contact having the same shape and size as that of the circuit board 20 is opposed to the membrane switch contact pattern 27. A pattern 59 is formed. Although not shown, a circuit pattern is drawn out from the membrane switch contact pattern 59 and led to the lead-out portion 30. The surface other than the membrane switch contact pattern 59 on the lower surface of the electrostatic intrusion prevention substrate 50 is covered with an insulating layer.

そして図2に示す状態から連結部19の部分を折り曲げることで、回路基板20の上に静電気侵入防止基板50を積層する。これによって図1に示すように、回路基板20上を静電気侵入防止基板50が覆い、静電気侵入防止基板50に設けた開口51にロータリースイッチ用接点パターン21が露出する。また前記回路基板20に設けたメンブレンスイッチ用接点パターン27と静電気侵入防止基板50に設けたメンブレンスイッチ用接点パターン59とは、回路基板20と静電気侵入防止基板50にそれぞれ設けた絶縁層によって所定の隙間を設けた状態で対向し、メンブレンスイッチを構成する。また回路基板20に設けた各挿入部43と静電気侵入防止基板50に設けた各挿入部53は一致し、同様に回路基板20に設けた開口45と静電気侵入防止基板50に設けた開口55は一致している。なお前記静電気侵入防止基板50のメンブレンスイッチ用接点パターン59の裏面側に位置する静電防止用パターン57上には、図1に示すように、ドーム形状の弾性金属板からなる反転板60が取り付けられる。   Then, the electrostatic intrusion prevention substrate 50 is laminated on the circuit board 20 by bending the connecting portion 19 from the state shown in FIG. As a result, as shown in FIG. 1, the electrostatic intrusion prevention substrate 50 covers the circuit board 20, and the rotary switch contact pattern 21 is exposed in the opening 51 provided in the electrostatic intrusion prevention substrate 50. Further, the membrane switch contact pattern 27 provided on the circuit board 20 and the membrane switch contact pattern 59 provided on the electrostatic intrusion prevention board 50 are predetermined by insulating layers provided on the circuit board 20 and the electrostatic intrusion prevention board 50, respectively. The membrane switch is configured to face each other with a gap. Further, each insertion portion 43 provided on the circuit board 20 and each insertion portion 53 provided on the static electricity intrusion prevention substrate 50 coincide with each other, and similarly, an opening 45 provided in the circuit board 20 and an opening 55 provided in the static electricity intrusion prevention substrate 50 are provided. Match. As shown in FIG. 1, a reversing plate 60 made of a dome-shaped elastic metal plate is attached on the antistatic pattern 57 located on the back side of the membrane switch contact pattern 59 of the antistatic intrusion preventing substrate 50. It is done.

次に図4はケース80及びこれに取り付けられる各種部品をその下面側から見た分解斜視図である。同図及び図1に示すように、ケース80は略矩形状の合成樹脂板であり、その下面の前記回路基板20のロータリースイッチ用接点パターン21を設けた部分に対向する位置には回転型物収納部81を設け、また前記回路基板20に取り付けた反転板60に対向する位置には押圧型物収納部91を設けて構成されている。さらにケース80下面の前記回路基板20と静電気侵入防止基板50にそれぞれ設けた開口45,55に対向する位置には接続機構収納部101が設けられている。   Next, FIG. 4 is an exploded perspective view of the case 80 and various parts attached to the case 80 as seen from the lower surface side. As shown in FIG. 1 and FIG. 1, the case 80 is a substantially rectangular synthetic resin plate, and a rotary type object is provided at a position facing the rotary switch contact pattern 21 on the lower surface of the circuit board 20. A storage part 81 is provided, and a pressing-type object storage part 91 is provided at a position facing the reversing plate 60 attached to the circuit board 20. Further, a connection mechanism housing portion 101 is provided at a position facing the openings 45 and 55 provided on the circuit board 20 and the static electricity intrusion prevention board 50 on the lower surface of the case 80, respectively.

ここで前記回転型物収納部81は、ケース80の下面に設けた円形の凹部によって構成され、またその中央には円形の開口部85が設けられている。また押圧型物収納部91は、ケース80の下面に設けた矩形状の凹部によって構成され、またその内部の所定位置に円形の開口部95が設けられている。接続機構収納部101はケース10の下面に設けた矩形状の凹部によって構成されている。またケース80下面の前記取付板10に設けた取付部11に対向する位置からは、それぞれ小突起状の固定部105が突出している。   Here, the rotary object storage portion 81 is constituted by a circular recess provided on the lower surface of the case 80, and a circular opening 85 is provided at the center thereof. Further, the press-type object storage portion 91 is constituted by a rectangular recess provided on the lower surface of the case 80, and a circular opening 95 is provided at a predetermined position inside thereof. The connection mechanism storage unit 101 is configured by a rectangular recess provided on the lower surface of the case 10. Further, from the position facing the mounting portion 11 provided on the mounting plate 10 on the lower surface of the case 80, a fixing portion 105 having a small protrusion shape protrudes.

そして回転型物収納部81内には回転型物120が収納され、押圧型物収納部91内には押圧型物130が収納され、接続機構収納部101内には接続機構として弾性部材140が収納される。ここで回転型物120は合成樹脂を円板状に成形した成型品であり、その中央には軸支突起121が設けられ、その周囲には上下に貫通する複数の係止孔123が設けられ、さらにその下面には金属板製の摺動子125が取り付けられている。次に押圧型物130は成型品であり、矩形状の基部131から薄板状のヒンジ部133を突出し、その先端に円形の押釦つまみ135を設けて構成されている。基部131には上下に貫通する二つの取付孔132が設けられ、押釦つまみ135の下面には押圧部137が設けられている。一方図1に示す回転つまみ127は、ケース80上面の開口部85上に回動自在に設置される。   The rotary mold storage unit 81 stores the rotary mold 120, the press mold storage unit 91 stores the pressing mold 130, and the connection mechanism storage unit 101 includes an elastic member 140 as a connection mechanism. Stored. Here, the rotary mold 120 is a molded product obtained by molding a synthetic resin into a disk shape, and a shaft support protrusion 121 is provided at the center thereof, and a plurality of locking holes 123 penetrating vertically are provided around it. Further, a slider 125 made of a metal plate is attached to the lower surface thereof. Next, the pressing mold 130 is a molded product, and is configured by protruding a thin plate-like hinge portion 133 from a rectangular base portion 131 and providing a circular push button knob 135 at the tip thereof. The base 131 is provided with two mounting holes 132 penetrating vertically, and a pressing portion 137 is provided on the lower surface of the push button knob 135. On the other hand, the rotary knob 127 shown in FIG. 1 is rotatably installed on the opening 85 on the upper surface of the case 80.

弾性部材140は弾性金属板製であり、平板状の基部141の一側辺から複数本の弾発アームを突出し、これをU字状に折り曲げてその先端を下方向に円弧状に湾曲変形させることで接点部143を設けて構成されている。基部141の四隅からは、鋭角な突起状の係止部145を突出している。これら係止部145は基部141をケース80の接続機構収納部101に収納した際に接続機構収納部101の内周側壁に強く係合して固定される寸法に形成されている。また接点部143は、少なくとも複数の接点部143の内の何れかが、これに対向する位置にある静電気侵入防止基板50の開口55内に位置し、同時に他の何れかの接点部143が静電気侵入防止基板50上の静電防止用パターン57に当接する位置に位置するように、その位置及び寸法形状が構成されている。   The elastic member 140 is made of an elastic metal plate, protrudes a plurality of elastic arms from one side of the flat base 141, and bends it into a U shape to bend and deform its tip downward in an arc shape. Thus, the contact portion 143 is provided. From the four corners of the base portion 141, sharp protrusion-like locking portions 145 protrude. These locking portions 145 are formed to have dimensions that allow the base portion 141 to be firmly engaged and fixed to the inner peripheral side wall of the connection mechanism storage portion 101 when the base portion 141 is stored in the connection mechanism storage portion 101 of the case 80. In addition, the contact portion 143 is located in the opening 55 of the electrostatic intrusion prevention substrate 50 at least one of the plurality of contact portions 143, and at the same time, any other contact portion 143 is The position and dimension of the intrusion prevention substrate 50 are configured so as to be located at a position in contact with the antistatic pattern 57 on the intrusion prevention substrate 50.

そしてこの電子機器1を組み立てるには、まずケース80の開口部85上に回転つまみ127を載置し、同時にケース80の下面の回転型物収納部81内に回転型物120を収納し、その際回転つまみ127の下面から突出する図示しない係止突起を開口部85に挿入してその先端を回転型物120の各係止孔123に挿入してその先端を熱カシメして一体に回転するように固定する。次にケース80下面の押圧型物収納部91内に押圧型物130を収納する。その際押圧型物収納部91内の二本の固定部105を押圧型物130の取付孔132に挿入し、同時に押釦つまみ135を開口部95に挿入する。   In order to assemble the electronic device 1, first, the rotary knob 127 is placed on the opening 85 of the case 80, and at the same time, the rotary type 120 is stored in the rotary type storage unit 81 on the lower surface of the case 80. At the same time, a locking projection (not shown) protruding from the lower surface of the rotary knob 127 is inserted into the opening 85 and its tip is inserted into each locking hole 123 of the rotary mold 120, and the tip is thermally crimped to rotate integrally. To fix. Next, the pressing mold 130 is stored in the pressing mold storage 91 on the lower surface of the case 80. At this time, the two fixing portions 105 in the pressing mold storage portion 91 are inserted into the attachment holes 132 of the pressing mold 130, and at the same time, the push button knob 135 is inserted into the opening 95.

一方ケース80下面の接続機構収納部101内に弾性部材140を収納し、その際弾性部材140の係止部145を接続機構収納部101の内周側壁に強く係合して固定する。   On the other hand, the elastic member 140 is housed in the connection mechanism housing portion 101 on the lower surface of the case 80, and the locking portion 145 of the elastic member 140 is firmly engaged and fixed to the inner peripheral side wall of the connection mechanism housing portion 101.

そして取付板10上に、その上面に静電気侵入防止基板50を積層した回路基板20を載置し、さらに静電気侵入防止基板50上に前記回転つまみ127等を取り付けたケース80を載置し、ケース80の下面から突出する各固定部105を静電気侵入防止基板50と回路基板20と取付板10にそれぞれ設けた挿入部53と挿入部43と取付部11とに挿入し、各固定部105の先端を取付板10の下面で熱カシメによって固定すれば、電子機器1が完成する。なお電子機器1の外観は前記図7に示す電子機器300と同一である。   Then, the circuit board 20 in which the electrostatic intrusion prevention board 50 is laminated on the upper surface thereof is placed on the mounting plate 10, and the case 80 to which the rotary knob 127 and the like are attached is placed on the electrostatic intrusion prevention board 50. Each fixing portion 105 protruding from the lower surface of 80 is inserted into the insertion portion 53, the insertion portion 43, and the attachment portion 11 provided on the electrostatic intrusion prevention substrate 50, the circuit board 20, and the attachment plate 10, respectively. Is fixed by thermal caulking on the lower surface of the mounting plate 10, the electronic device 1 is completed. The external appearance of the electronic device 1 is the same as the electronic device 300 shown in FIG.

そして回転つまみ127を回転すればこれと一体に回転型物120が回転し、摺動子125が回路基板20のロータリースイッチ用接点パターン21上を摺動し、これによって所望のオンオフ出力が得られる。一方押釦つまみ135を押圧すれば、その押圧部137が反転板60を押圧してこれを反転し、同時に両メンブレンスイッチ用接点パターン27,59が当接してオンする。   When the rotary knob 127 is rotated, the rotary mold 120 rotates integrally therewith, and the slider 125 slides on the rotary switch contact pattern 21 of the circuit board 20, thereby obtaining a desired on / off output. . On the other hand, when the push button knob 135 is pressed, the pressing portion 137 presses the reverse plate 60 to reverse it, and at the same time, the contact patterns 27 and 59 for both membrane switches come into contact and turn on.

一方、静電気侵入防止基板50上に形成した静電防止用パターン57は、弾性部材140によって取付板10に接続されている。ここで図5は電子機器1の前記弾性部材140等による接続機構部分の要部拡大概略断面図である。同図に示すように、この実施形態においては、回路基板20に設けた開口45と静電気侵入防止基板50に設けた開口55とに取付板10の突起13を挿入してその上面13aを静電気侵入防止基板50の開口55内に露出し、導電性を有する弾性部材140をその弾発力によって同時に突起13と静電防止用パターン57とに圧接接続することで、取付板10と静電防止用パターン57とを電気的に接続する接続機構を構成する。即ち取付板10に設けた突起13を、静電気侵入防止基板50の静電防止用パターン57に電気的に接続する接続機構が構成される。   On the other hand, the antistatic pattern 57 formed on the static electricity intrusion prevention substrate 50 is connected to the mounting plate 10 by the elastic member 140. Here, FIG. 5 is an enlarged schematic cross-sectional view of a main part of a connection mechanism portion by the elastic member 140 or the like of the electronic device 1. As shown in the figure, in this embodiment, the protrusion 13 of the mounting plate 10 is inserted into the opening 45 provided in the circuit board 20 and the opening 55 provided in the electrostatic intrusion prevention board 50, and the upper surface 13a is electrostatically intruded. An elastic member 140 that is exposed in the opening 55 of the prevention substrate 50 and is electrically connected to the projection 13 and the antistatic pattern 57 simultaneously by its elastic force is connected to the mounting plate 10 and the antistatic electrode. A connection mechanism for electrically connecting the pattern 57 is configured. That is, a connection mechanism for electrically connecting the protrusion 13 provided on the mounting plate 10 to the antistatic pattern 57 of the antistatic intrusion prevention substrate 50 is configured.

このように構成すれば、例えば回転つまみ127や押釦つまみ135を人の指で操作すると、帯電している人の静電気が回転つまみ127とケース80の開口部85の間の隙間や、押釦つまみ135の外周とケース80の開口部95の間の隙間からケース80の下面側に侵入する場合があるが、この静電気は回路基板20の回路パターンに入射する前に、その上に設置した静電気侵入防止基板50の静電防止用パターン57に入射し、さらにこの静電気はこの静電防止用パターン57に弾接接続されている弾性部材140を介して突起13から取付板10に導かれ、取付板10の所望の位置からアースすることができる。これによってケース80側から電子機器1内に侵入する静電気を容易に取付板10に導くことができる。   With this configuration, for example, when the rotary knob 127 or the push button knob 135 is operated with a human finger, the static electricity of the charged person causes a gap between the rotary knob 127 and the opening 85 of the case 80 or the push button knob 135. May enter the lower surface side of the case 80 from a gap between the outer periphery of the circuit board 80 and the opening portion 95 of the case 80. This static electricity is prevented from entering the circuit pattern on the circuit board 20 before entering the circuit pattern. The light enters the antistatic pattern 57 of the substrate 50, and the static electricity is guided from the protrusion 13 to the mounting plate 10 via the elastic member 140 elastically connected to the antistatic pattern 57, and is attached to the mounting plate 10. It is possible to ground from a desired position. Accordingly, static electricity that enters the electronic device 1 from the case 80 side can be easily guided to the mounting plate 10.

特にこの実施形態の場合、弾性部材140の弾発力によって静電防止用パターン57と取付板10の突起13とを圧接接続して導通するので、たえず均一の力で取付板10の突起13と静電防止用パターン57とを接続することができ、環境ストレスによる各部材の変形等が起こってもその電気的接続を確実に行え、確実な取付板10への導通が図れ、確実なアースが行える。   In particular, in the case of this embodiment, since the antistatic pattern 57 and the protrusion 13 of the mounting plate 10 are pressed and connected by the elastic force of the elastic member 140, the protrusion 13 of the mounting plate 10 is constantly connected with a uniform force. The anti-static pattern 57 can be connected, and even if deformation of each member due to environmental stress occurs, the electrical connection can be performed reliably, and conduction to the mounting plate 10 can be ensured, and reliable grounding can be achieved. Yes.

図6は本発明の参考例にかかる接続機構を示す要部拡大概略断面図である。この参考例においては、前記図5に示す弾性部材140を用いず、突起13の先端に開口13bを設けて円筒状に形成し、これを静電防止用パターン57の上面に鳩目状にかしめている。即ちこの接続機構は、回路基板20に設けた開口45と静電気侵入防止基板50に設けた開口55とに取付板10の突起13を挿入し、この突起13を静電気侵入防止基板50の静電防止用パターン57にカシメることで、取付板10と静電防止用パターン57とを電気的に接続する機構に構成されている。このように構成すれば、かしめた突起13の先端と、静電防止用パターン57の上面とが強固に機械的に接続・固定され、この構造によっても静電防止用パターン57と突起13との接触力を強くでき、従って両者間の導通は良好となり、アースを十分にとることができる。 FIG. 6 is an enlarged schematic cross-sectional view showing a main part of a connection mechanism according to a reference example of the present invention. In this reference example , the elastic member 140 shown in FIG. 5 is not used, but the opening 13b is provided at the tip of the protrusion 13 to form a cylindrical shape, and this is caulked in the shape of an eyelet on the upper surface of the antistatic pattern 57. Yes. That is, this connection mechanism inserts the protrusion 13 of the mounting plate 10 into the opening 45 provided in the circuit board 20 and the opening 55 provided in the electrostatic intrusion prevention board 50, and the protrusion 13 is inserted into the antistatic intrusion prevention board 50. The mechanism is configured to electrically connect the mounting plate 10 and the antistatic pattern 57 by caulking to the pattern 57 for use. With this configuration, the crimped tip of the protrusion 13 and the upper surface of the antistatic pattern 57 are mechanically connected and fixed firmly, and this structure also allows the antistatic pattern 57 and the protrusion 13 to be fixed. The contact force can be increased, so that the electrical connection between the two is good and sufficient grounding can be obtained.

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。例えば上記実施形態では回路基板20と静電気侵入防止基板50間を連結部19によって連結しているが、連結部19をなくして、回路基板20と静電気侵入防止基板50とをそれぞれ独立した別のシートによって構成しても良い。また回路基板20や静電気侵入防止基板50は硬質基板であっても良い。また取付板は金属板でなくても良く、要は導電性を有する板であれば良い。 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, and material not directly described in the specification and drawings are within the scope of the technical idea of the present invention as long as the effects and advantages of the present invention are exhibited. Another Above Symbol embodiment For example but are connected by a connecting portion 19 between the circuit board 20 and the static intrusion prevention substrate 50, which eliminates the connection portion 19, and independently of the circuit board 20 and the static intrusion prevention board 50 You may comprise by the sheet | seat. Further, the circuit board 20 and the static electricity intrusion prevention board 50 may be hard boards. The mounting plate may not be a metal plate, and may be any plate having conductivity.

また上記実施形態では静電防止用パターン57を静電気侵入防止基板50にのみ設けたが、この静電防止用パターン57を連結部19を通して回路基板20の裏面側(取付板10に対向する面側)にも一体に設けてこのパターンを取付板10に接触させるようにしても良い。このように構成すれば、上記した本発明の静電気侵入防止構造によって、静電防止用パターン57に入射した静電気を確実に取付板10に導くことができる上、さらに静電防止用パターン57に入射した静電気を連結部19と回路基板20の裏面側に設けたパターンを通して取付板10に導く構造が加わり、その電気的接続の信頼性がさらに高まる。   In the above embodiment, the antistatic pattern 57 is provided only on the antistatic intrusion prevention substrate 50. However, the antistatic pattern 57 is connected to the back surface side of the circuit board 20 through the connecting portion 19 (the surface side facing the mounting plate 10). ) May be integrally provided so that this pattern is brought into contact with the mounting plate 10. With this configuration, the static electricity intrusion prevention structure of the present invention described above can reliably guide the static electricity incident on the antistatic pattern 57 to the mounting plate 10 and further enter the antistatic pattern 57. A structure for introducing the static electricity to the mounting plate 10 through a pattern provided on the back surface side of the connecting portion 19 and the circuit board 20 is added, and the reliability of the electrical connection is further increased.

本発明の第一実施形態を適用してなる電子機器1の分解斜視図である。1 is an exploded perspective view of an electronic device 1 to which a first embodiment of the present invention is applied. 回路基板20と静電気侵入防止基板50の展開斜視図(回路基板20の上面が上を向く状態)である。FIG. 3 is a developed perspective view of the circuit board 20 and the static electricity intrusion prevention board 50 (a state in which the upper surface of the circuit board 20 faces upward). 回路基板20と静電気侵入防止基板50の展開斜視図(静電気侵入防止基板50の上面が上を向く状態)である。FIG. 2 is a developed perspective view of the circuit board 20 and the static electricity intrusion prevention substrate 50 (a state in which the upper surface of the static electricity intrusion prevention board 50 faces upward). ケース80及びこれに取り付けられる各種部品をその下面側から見た分解斜視図である。It is the disassembled perspective view which looked at case 80 and the various components attached to this from the lower surface side. 電子機器1の弾性部材140等による接続機構部分の要部拡大概略断面図である。3 is an enlarged schematic cross-sectional view of a main part of a connection mechanism portion by an elastic member 140 or the like of the electronic device 1. 本発明の参考例にかかる接続機構を示す要部拡大概略断面図である。It is a principal part expansion schematic sectional drawing which shows the connection mechanism concerning the reference example of this invention. 電子機器300の一例を示す斜視図である。4 is a perspective view illustrating an example of an electronic apparatus 300. FIG. 電子機器300の分解斜視図である。2 is an exploded perspective view of an electronic device 300. FIG. 静電気侵入防止基板380とフレキシブル回路基板330の展開斜視図である。FIG. 6 is a developed perspective view of an electrostatic intrusion prevention substrate 380 and a flexible circuit board 330.

符号の説明Explanation of symbols

1 電子機器
10 取付板
13 突起
13a 上面
20 回路基板
21 ロータリースイッチ用接点パターン
23 コモンパターン
25 オンオフパターン
27 メンブレンスイッチ用接点パターン
45 開口
50 静電気侵入防止基板
55 開口
57 静電防止用パターン
59 メンブレンスイッチ用接点パターン
80 ケース
101 接続機構収納部
120 回転型物
127 回転つまみ
130 押圧型物
135 押釦つまみ
140 弾性部材(接続機構)
141 基部
143 接点部
145 係止部
DESCRIPTION OF SYMBOLS 1 Electronic device 10 Mounting plate 13 Protrusion 13a Upper surface 20 Circuit board 21 Rotary switch contact pattern 23 Common pattern 25 On-off pattern 27 Membrane switch contact pattern 45 Opening 50 Static intrusion prevention board 55 Opening 57 Antistatic pattern 59 For membrane switch Contact pattern 80 Case 101 Connection mechanism storage 120 Rotating mold 127 Rotating knob 130 Pressing mold 135 Pushbutton knob 140 Elastic member (connection mechanism)
141 Base part 143 Contact part 145 Locking part

Claims (1)

導電性を有する取付板上に回路基板を載置し、さらにこの回路基板をケースで覆ってなる構造の電子機器の静電気侵入防止機構において、
前記回路基板上に、その上面に静電防止用パターンを設けた静電気侵入防止基板を載置し、
さらに前記回路基板に設けた開口と静電気侵入防止基板に設けた開口とに前記取付板に設けた突起を挿入してその上面を静電気侵入防止基板の開口内に露出し、導電性を有する弾性部材をケースの下面と静電防止用パターン及び突起上面との間に挟持して前記突起上面と前記静電防止用パターンとに圧接接続することで、取付板と静電防止用パターンとを電気的に接続する接続機構を設け、
これによってケース側から静電防止用パターンに侵入した静電気を取付板に導くことを特徴とする電子機器の静電気侵入防止機構。
In an electrostatic intrusion prevention mechanism for an electronic device having a structure in which a circuit board is placed on a conductive mounting plate and the circuit board is covered with a case.
On the circuit board, an electrostatic intrusion prevention board having an antistatic pattern provided on its upper surface is placed,
Further, a protrusion provided on the mounting plate is inserted into the opening provided in the circuit board and the opening provided in the electrostatic intrusion prevention board, and the upper surface thereof is exposed in the opening of the electrostatic intrusion prevention board, and the conductive elastic member Is sandwiched between the lower surface of the case and the antistatic pattern and the upper surface of the protrusion, and is press-contacted to the upper surface of the protrusion and the antistatic pattern to electrically connect the mounting plate and the antistatic pattern. Provide a connection mechanism to connect to
An electrostatic intrusion prevention mechanism for electronic equipment, characterized in that the static electricity that has entered the antistatic pattern from the case side is guided to the mounting plate.
JP2004185839A 2004-06-24 2004-06-24 Electrostatic intrusion prevention mechanism for electronic equipment Expired - Fee Related JP4381238B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004185839A JP4381238B2 (en) 2004-06-24 2004-06-24 Electrostatic intrusion prevention mechanism for electronic equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004185839A JP4381238B2 (en) 2004-06-24 2004-06-24 Electrostatic intrusion prevention mechanism for electronic equipment

Publications (2)

Publication Number Publication Date
JP2006012514A JP2006012514A (en) 2006-01-12
JP4381238B2 true JP4381238B2 (en) 2009-12-09

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004185839A Expired - Fee Related JP4381238B2 (en) 2004-06-24 2004-06-24 Electrostatic intrusion prevention mechanism for electronic equipment

Country Status (1)

Country Link
JP (1) JP4381238B2 (en)

Also Published As

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