JP4962450B2 - Ground connection structure - Google Patents

Ground connection structure Download PDF

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JP4962450B2
JP4962450B2 JP2008222395A JP2008222395A JP4962450B2 JP 4962450 B2 JP4962450 B2 JP 4962450B2 JP 2008222395 A JP2008222395 A JP 2008222395A JP 2008222395 A JP2008222395 A JP 2008222395A JP 4962450 B2 JP4962450 B2 JP 4962450B2
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connection structure
chassis
housing
ground connection
hole
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JP2010056448A (en
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麻里恵 大野
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JVCKenwood Corp
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Description

本発明は、アース接続構造に係り、より詳細には、プリント基板の配線パターンや電子部品の実装位置でグランド（アース）を強くして性能を向上させるアース接続構造に関する。   The present invention relates to a ground connection structure, and more particularly to a ground connection structure that improves performance by strengthening a ground (earth) at a wiring pattern of a printed board or a mounting position of an electronic component.

従来、アース接続構造は、車載用のカーオーディオなどの移動体電子器機に採用されており、プリント基板の配線パターンや電子部品（チューナ）の実装位置でグランドを強くして性能を向上させるため、例えば、電子部品を内装したシールドケースを実装したプリント基板を、上シャシ及び下シャシを嵌合してなる金属体の筐体の下シャシに固定し、この下シャシにリードプレート（金属体）などを取付けて電子部品が内装されたシールドケースに半田付けなどにより接続してアースするように構成していた（図７参照）。或いは、前述した下シャシにプリント基板を固定し、上シャシにリードプレートを取り付け、筐体の嵌合時にリードプレートと電子部品を内装したシールドケースとを適度に圧接させてアースする構成も多く使用されていた（例えば、特許文献１及び図８参照）。
特開２００８−１４６９２０号公報 Conventionally, the ground connection structure has been adopted in mobile electronic devices such as in-car car audio, and in order to improve the performance by strengthening the ground at the printed circuit board wiring pattern and electronic component (tuner) mounting position, For example, a printed circuit board mounted with a shield case with electronic components inside is fixed to a lower chassis of a metal housing that is formed by fitting an upper chassis and a lower chassis, and a lead plate (metal body) is attached to the lower chassis. And connected to a shield case with electronic components inside by soldering or the like (see FIG. 7). Alternatively, the printed circuit board is fixed to the lower chassis described above, a lead plate is attached to the upper chassis, and a structure in which the lead plate and the shield case with electronic components are properly pressed and grounded when the housing is fitted is often used. (For example, see Patent Document 1 and FIG. 8).
JP 2008-146920 A

前述した構造による実施の形態を、図７および図８を参照して説明する。図７は、従来のアース接続構造の一実施形態を示す斜視図である。また、図８は、従来のアース接続構造の他の実施形態を示す断面図である。
図７に示すように、従来のアース接続構造の一実施形態として、上シャシ（図示せず）及び下シャシ３０を嵌合してなる金属体の筐体を備え、この下シャシ３０内に電子部品を内装したシールドケース３４を実装したプリント基板３２を固定して収納している。そして、この下シャシ３０の側壁の上端に、金属体からなるリードプレート３８を装着できるように形成しており、このリードプレート３８をシールドケース３４に半田付けなどにより接続することで、シールドケース３４を筐体にアースできるように形成している。
しかし、図７に示したアース接続構造では、リードプレート３８を下シャシ３２の側壁上端に確実に取り付けないと容易に外れるとともに、シールドケース３４に半田付けするため工程が増えて製造コストがかかるという不具合がある。また、リードプレート３８を下シャシ３２の側壁上端に、ネジ（図示せず）などで固定すると、部品が増えて分解時に新たにドライバ（工具）が必要になり、より製造コストが増加してしまう。 An embodiment having the above-described structure will be described with reference to FIGS. FIG. 7 is a perspective view showing an embodiment of a conventional ground connection structure. FIG. 8 is a cross-sectional view showing another embodiment of a conventional ground connection structure.
As shown in FIG. 7, as an embodiment of a conventional earth connection structure, a metal housing formed by fitting an upper chassis (not shown) and a lower chassis 30 is provided. A printed circuit board 32 mounted with a shield case 34 in which components are housed is fixed and stored. A lead plate 38 made of a metal body is formed on the upper end of the side wall of the lower chassis 30. The lead plate 38 is connected to the shield case 34 by soldering or the like. Is formed so that it can be grounded to the housing.
However, in the ground connection structure shown in FIG. 7, it is easy to remove the lead plate 38 unless it is securely attached to the upper end of the side wall of the lower chassis 32, and soldering to the shield case 34 increases the number of processes and increases manufacturing costs. There is a bug. Further, if the lead plate 38 is fixed to the upper end of the side wall of the lower chassis 32 with screws (not shown) or the like, the number of parts increases, and a new driver (tool) is required at the time of disassembly, which further increases the manufacturing cost. .

一方、図８に示すように、従来のアース接続構造の他の実施形態は、上シャシ５０及び下シャシ４０を嵌合してなる筐体を備え、この上シャシ５０にネジ１によりリードプレート５２を固定し、下シャシ４０に電子部品を内装したシールドケース４４を実装するプリント基板４２を固定しているため、筐体の嵌合時にリードプレート５２がシールドケース４４に適度に圧接してアースさせることができる。即ち、筐体を組立てることで、アース構造が構成されるため、前述の図７に示したアース接続構造に比べて、製造工程（特に、半田付け）を低減でき、製造コストも削減することができる。
しかしながら、図８に示したアース接続構造も、上シャシ５０にリードプレート５２をネジ１により固定する製造工程を含んでいるため、部品数及び製造工数を十分に削減することはできなかった。 On the other hand, as shown in FIG. 8, another embodiment of the conventional ground connection structure includes a housing in which an upper chassis 50 and a lower chassis 40 are fitted, and a lead plate 52 is attached to the upper chassis 50 by screws 1. Since the printed circuit board 42 on which the shield case 44 with electronic components is mounted is fixed to the lower chassis 40, the lead plate 52 is appropriately pressed against the shield case 44 and grounded when the housing is fitted. be able to. That is, since the ground structure is configured by assembling the housing, the manufacturing process (particularly soldering) can be reduced and the manufacturing cost can be reduced as compared with the ground connection structure shown in FIG. it can.
However, since the ground connection structure shown in FIG. 8 also includes a manufacturing process in which the lead plate 52 is fixed to the upper chassis 50 with the screws 1, the number of parts and manufacturing man-hours could not be reduced sufficiently.

このように、従来のアース接続構造では、図７に示した構造によると前述した半田付けや取り付けによる製造工程（工数）が増えて製造コストがかかるとともに、図８に示した構造によると半田付けなどの工程を削減できるが、ネジなどの部品点数や取り付け工数を十分に削減することができないという不具合があった。また、図７及び図８に示したリードプレート３８、５２は、薄板状で取り付け時に作業者が把持する部分が少ないため、例えば、取り付け時や移動時に変形や落として紛失してしまう可能性があった。   Thus, in the conventional ground connection structure, the structure shown in FIG. 7 increases the manufacturing process (man-hours) due to the above-described soldering and attachment, which increases the manufacturing cost, and the structure shown in FIG. The number of parts such as screws and the number of mounting steps cannot be reduced sufficiently. Further, the lead plates 38 and 52 shown in FIGS. 7 and 8 are thin and have a small portion to be gripped by an operator when attached. For example, the lead plates 38 and 52 may be deformed or dropped when attached or moved. there were.

本発明は上記の点に鑑みなされたもので、その目的は、簡単な構造により部品点数を減らして確実に固定でき製造工程（製造工数）を削減し、製造を容易にしてコストを低減できるアース接続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 an object of the present invention is to reduce the number of parts by a simple structure and fix them securely, reduce the manufacturing process (manufacturing man-hours), simplify the manufacturing, and reduce the cost. It is to provide a connection structure.

本発明によるアース接続構造は、上述した課題を解決するため、一対のシャシを嵌合してなる筐体と、この一対のシャシいずれか一方に電子部品を内装したシールドケースを実装して固定されるプリント基板と、このプリント基板を固定した一方のシャシと異なる他方のシャシに固定されて板状で弾性を有して嵌合時にバネ圧によりシールドケースに圧接して筐体とアース接続させる接点部を備えてこの接点部の延在する端部に延在して他方のシャシに差し込まれて固定される固定部を一体に有して固定部の差し込み方向の後端部と両側部とから垂直にコ字状リブを延在してなる保持部を更に一体に設けたリードプレートとを備え、このリードプレートは、他方の筐体にコ字状リブの保持部を把持して差し込むとともに、筐体の嵌合後に保持部の後端部が筐体内に収納される内部部品に近接して配置されて差し込み方向と逆方向に抜けることを防止する。   In order to solve the above-described problem, the ground connection structure according to the present invention is fixed by mounting a casing in which a pair of chassis are fitted and a shield case in which an electronic component is housed in one of the pair of chassis. A printed circuit board that is fixed to the other chassis that is different from the one chassis to which this printed circuit board is fixed, has a plate-like elasticity, and is pressed against the shield case by spring pressure when mated, and is connected to the chassis to ground A fixed portion that is integrated with a fixed portion that extends into the extending end of the contact portion and is inserted into and fixed to the other chassis. A lead plate provided with a holding portion formed by vertically extending a U-shaped rib, and this lead plate grips and inserts the holding portion of the U-shaped rib into the other housing, and Hold after mating The rear end portion is prevented from escaping in the direction opposite insertion is arranged close to the internal components housed in the housing of the.

ここで、リードプレートは、筐体に前記差し込み方向に間隔を有して開口する第１、第２、第３穴を開口し、固定部の先端が差し込み方向中央の第２穴に挿入されて筐体内から前方の第３穴に向かって押されて嵌入する凸部を有し、この凸部が第２穴に差し込まれる際に固定部の後方でＬ字状に突出して第１穴に挿入されて係合するフック部を備えることが好ましい。また、リードプレートは、凸部が第３穴に嵌入して差し込み方向の位置決めを行うとともに、フック部が第１穴に嵌入して差し込み方向と直交する左右方向の位置決めを行うことが好ましい。また、シールドケースは、筐体内の中央に収納される内部部品に対し、その周囲に配置されることが好ましい。また、電子部品は、チューナであることが好ましい。   Here, the lead plate has first, second, and third holes that are opened in the housing with a gap in the insertion direction, and the distal end of the fixing portion is inserted into the second hole at the center of the insertion direction. It has a convex part that is pushed from the inside of the housing toward the front third hole and is inserted into the second hole. When this convex part is inserted into the second hole, it protrudes in an L shape behind the fixed part and is inserted into the first hole. It is preferable to provide a hook portion to be engaged. In addition, it is preferable that the lead plate is positioned in the insertion direction by inserting the convex portion into the third hole, and is positioned in the left-right direction perpendicular to the insertion direction by inserting the hook portion in the first hole. Moreover, it is preferable that the shield case is disposed around the inner part housed in the center of the housing. The electronic component is preferably a tuner.

以上、本発明によるアース接続構造によれば、ネジを使用しないで保持部を把持して一部品の差し込みで簡単に取り付けられ（部品点数の削減）、一旦組立てると筐体の外側から凸部を意図的に外そうとしない限り、確実に固定されており、仮に、凸部を外した場合でも、取り付け時に保持部に形成した後端部のコ字状リブが、内部部品であるメカシャシによって移動が制限され外れることを防止できる。従って、製造工程での部品点数や工数の全体的なコスト削減を実現できる。また、リードプレート組立てに見合った保持部を持たせることで、作業性の向上と、変形や紛失がなく部品の品質維持が良くなる。   As described above, according to the ground connection structure of the present invention, the holding part can be easily attached by inserting one part without using a screw (reducing the number of parts), and once assembled, the convex part is formed from the outside of the housing. Unless you try to remove it intentionally, it is securely fixed, and even if you remove the convex part, the U-shaped rib on the rear end formed on the holding part at the time of attachment moves by the mechanical chassis that is an internal part Can be prevented from being restricted. Therefore, the overall cost reduction of the number of parts and man-hours in the manufacturing process can be realized. Also, by providing a holding part suitable for assembling the lead plate, the workability is improved and the quality of the parts is improved without deformation or loss.

次に、添付図面を参照して本発明によるアース接続構造の実施の形態を詳細に説明する。図１は、本発明によるアース接続構造の一実施形態を示す斜視図である。また、図２は、図１に示したリードプレート１２の取り付け前後の状態を示す図であり、図２（ａ）は取り付け前の状態を、図２（ｂ）は取り付け後の状態を各々示している。また、図３は、図１に示したリードプレート１２の全体を示す斜視図である。また、図４は、図３にリードプレート１２の細部を示す図であり、図４（ａ）は図３に示したＡ−Ａ線の断面を、図４（ｂ）は図３に示した矢印Ｂからみた側面を各々示している。また、図５は、図１に示したリードプレート１２の取り付け動作を示す図であり、図５（ａ）は取り付け途中の状態を、図５（ｂ）は取り付け後の状態を各々示している。また、図６は、図１に示した筐体を組立てた外装全体を示す外観斜視図である。   Next, embodiments of the ground connection structure according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing an embodiment of a ground connection structure according to the present invention. 2 is a view showing a state before and after the lead plate 12 shown in FIG. 1 is attached. FIG. 2 (a) shows a state before attachment, and FIG. 2 (b) shows a state after attachment. ing. FIG. 3 is a perspective view showing the entire lead plate 12 shown in FIG. 4 is a view showing details of the lead plate 12 in FIG. 3, FIG. 4 (a) is a cross-sectional view taken along line AA shown in FIG. 3, and FIG. 4 (b) is shown in FIG. Side surfaces viewed from the arrow B are shown. FIG. 5 is a diagram showing the mounting operation of the lead plate 12 shown in FIG. 1, FIG. 5 (a) shows a state during the mounting, and FIG. 5 (b) shows a state after the mounting. . FIG. 6 is an external perspective view showing the entire exterior assembled from the housing shown in FIG.

図１に示すように、本発明によるアース接続構造の一実施形態は、従来技術と同様に車載用のオーディオなどの移動体電子器機に採用されており、一対の上シャシ１０と下シャシ２０とを嵌合して一部または全体が金属体からなる筐体と、この一対のシャシの下シャシ２０に電子部品（チューナ）を内装したシールドケース２４を実装して固定されて収納されるプリント基板２２と、このプリント基板２２の上部のほぼ中央に配置して固定される内部部品２６（メカシャシ：例えば、ＣＤやＤＶＤの出し入れ機構）と、このプリント基板２２を固定した下シャシ２０とは異なる上シャシ１０（金属体）に固定されて金属体の板状で弾性を有して筐体の嵌合時にバネ圧によりプリント基板２２のシールドケース２４に圧接してアース接続させるリードプレート１２とを備えている。   As shown in FIG. 1, an embodiment of the ground connection structure according to the present invention is adopted in a mobile electronic device such as an in-vehicle audio as in the prior art, and includes a pair of an upper chassis 10 and a lower chassis 20. A printed circuit board that is fixedly housed by mounting a casing made of a metal body in part or entirely and a shield case 24 in which an electronic component (tuner) is mounted on the lower chassis 20 of the pair of chassis. 22 and an internal component 26 (mechanism chassis: for example, a CD / DVD loading / unloading mechanism) which is disposed and fixed at substantially the center of the upper portion of the printed circuit board 22 and the lower chassis 20 to which the printed circuit board 22 is fixed. It is fixed to the chassis 10 (metal body) and is elastic in the shape of a metal plate, and is pressed against the shield case 24 of the printed circuit board 22 by spring pressure when the housing is fitted to be grounded. And a Dopureto 12.

ここで、上シャシ１０には、図８に示した従来技術と異なり、リードプレート１２をネジにより固定するものではなく、図２（ａ）に示すように、シャシ内の表面にリードプレート１２（図１参照）の差し込み方向に沿って間隔を有して開口する３つの第１穴２０ａ、第２穴２０ｂ、第３穴２０ｃを各々開口しており、この穴のみにより、図２（ｂ）に示すように、リードプレート１２を固定できるように形成している。以下、リードプレート１２の構造とともに、取り付け構造に関して具体的に説明する。   Here, unlike the prior art shown in FIG. 8, the lead plate 12 is not fixed to the upper chassis 10 with screws, but as shown in FIG. 2A, the lead plate 12 ( The first hole 20a, the second hole 20b, and the third hole 20c that are opened at intervals along the insertion direction of FIG. As shown, the lead plate 12 is formed so as to be fixed. Hereinafter, the mounting structure as well as the structure of the lead plate 12 will be described in detail.

まず、リードプレート１２は、図３に示すように、板状で弾性を有して長く延在して嵌合時にバネ圧によりシールドケース２４（図１参照）に圧接してアース接続させる接点部１２ａと、この接点部１２ａの延在する端部ａに当該延在方向と直交する方向に延在して上シャシ１０（図１参照）に差し込まれて固定される固定部１２ｂと、この固定部１２ｂの差し込み方向（図３に示した矢印Ｂ方向）の後部の後端部ｂと両側部ｃとから垂直にコ字状リブを延在してなる保持部１２ｃとを一体に形成している。
ここで、固定部１２ｂは、接点部１２ａの延在する端部ａに直交して略Ｔ字になるように薄板状に延在しており、その先端を差し込み方向（矢印Ｂ方向）に上シャシ１０の第１及び第２穴２０ａ、２０ｂ（図２参照）に差し込むことで固定される。より具体的に、固定部１２ｂは、図４（ａ）に示すように、上シャシ１０に差し込む先端をＬ字状に屈曲させて段差になるように延在させてその中央部に突出する凸部１２ｂ−２を一体に形成している。また、固定部１２ｂは、図３に示した接点部１２ａの端部ａの近傍に、図４（ａ）に示したように、前述した先端の段差のようにＬ字状に屈曲させたフック部１２ｂ−１を更に一体に形成している。この段差は、上シャシ１０の肉厚に応じて形成する。尚、接点部１２ａと固定部１２ｂとをＴ字状に直交させて設けた実施例を説明したが、例えば、接点部の延在方向と同じ方向に固定部を延在させてＩ字状に設けても良い。
また、保持部１２ｃは、図４（ａ）に示したように、後端部ｂを差し込み方向に対して垂直上方に折り曲げ、その両側部ｃ（図３参照）も同様に折り曲げることで、コ字状のリブになるように形成している。この保持部１２ｃは、後述するが、上シャシ１０に差し込む際に、作業者が把持して差し込めるように把持するとともに固定用に用いられる。
さらに、接点部１２ａは、図４（ｂ）に示すように、前述した固定部１２ｂの位置に対して、若干傾斜して垂れ下がるように傾けた状態で形成され、図１に示したプリント基板２２に実装したシールドケース２４に適度な弾性を有して圧接できるように形成している。 First, as shown in FIG. 3, the lead plate 12 is a plate-like, elastic, long extension, and is brought into contact with the shield case 24 (see FIG. 1) by spring pressure when fitted to be grounded. 12a, a fixing portion 12b extending in a direction perpendicular to the extending direction to the extending end portion a of the contact portion 12a, and being fixed by being inserted into the upper chassis 10 (see FIG. 1). A holding portion 12c formed by extending a U-shaped rib vertically from the rear end portion b of the rear portion and the side portions c in the insertion direction of the portion 12b (in the direction of arrow B shown in FIG. 3); Yes.
Here, the fixed portion 12b extends in a thin plate shape so as to be substantially T-shaped orthogonal to the end portion a where the contact portion 12a extends, and its tip is upward in the insertion direction (arrow B direction). The chassis 10 is fixed by being inserted into the first and second holes 20a and 20b (see FIG. 2). More specifically, as shown in FIG. 4 (a), the fixing portion 12b is a protrusion that protrudes into the center portion by bending the tip inserted into the upper chassis 10 into an L-shape and extending so as to form a step. The part 12b-2 is integrally formed. Further, the fixed portion 12b is a hook that is bent in an L-shape near the end a of the contact portion 12a shown in FIG. 3 as shown in FIG. 4A. The portion 12b-1 is further integrally formed. This step is formed according to the thickness of the upper chassis 10. In addition, although the Example which provided the contact part 12a and the fixing | fixed part 12b orthogonally in the T shape was demonstrated, for example, a fixing | fixed part is extended in the same direction as the extension direction of a contact part, and it is I-shaped. It may be provided.
Further, as shown in FIG. 4A, the holding portion 12c is bent by bending the rear end portion b vertically upward with respect to the insertion direction, and similarly bending both side portions c (see FIG. 3). It is formed to be a letter-shaped rib. Although this holding | maintenance part 12c is mentioned later, when inserting in the upper chassis 10, it hold | grips so that an operator may hold | grip and insert and it is used for fixation.
Further, as shown in FIG. 4B, the contact portion 12a is formed in a state of being inclined so as to be slightly inclined with respect to the position of the fixing portion 12b described above, and the printed circuit board 22 shown in FIG. The shield case 24 mounted on is formed so that it can be pressed with appropriate elasticity.

このような構造からなるリードプレート１２は、図５に示した簡単な動作によって、容易に上シャシ１０に固定することができる。以下、図５を参照して、詳細に説明する。
まず、図５（ａ）に示すように、リードプレート１２は、上シャシ１０に差し込む際、作業者がコ字状リブからなる保持部１２ｃを把持し、その先端の凸部１２ｂ−２側を、上シャシ１０の第２穴２０ｂに斜め方向に差し込むことで、上シャシ１０の内壁に凸部１２ｂ−２が当接して付勢させながら圧入される。この際、リードプレート１２のフック部１２ｂ−１は、第１穴２０ａに同時に挿入されて、Ｌ字状のフックに上シャシ１０の肉厚を挟むように固定される。
そして、固定部１２ｂの凸部１２ｂ−２とフック部１２ｂ−１とが第２穴２０ｂ及び第１穴２０ａに嵌入された後、リードプレート１２の後端部ｂの保持部１２ｃを、図５（ｂ）に示すように更に押すことで、凸部１２ｂ−２を第３穴２０ｃに嵌入させて差し込みを完了する。尚、上シャシ１０に第３穴２０ｃを、リードプレート１２に凸部１２ｂ−２を設けて嵌合させる実施例を説明したが、これに限定されるものではなく、例えば、上シャシ１０に凸部を、リードプレート１２に第３穴を設けても良い。 The lead plate 12 having such a structure can be easily fixed to the upper chassis 10 by the simple operation shown in FIG. Hereinafter, a detailed description will be given with reference to FIG.
First, as shown in FIG. 5A, when the lead plate 12 is inserted into the upper chassis 10, the operator holds the holding portion 12c made of a U-shaped rib, and the convex portion 12b-2 side at the tip thereof is held. By inserting the second chassis 20 in the second hole 20 b in an oblique direction, the convex portion 12 b-2 is pressed against the inner wall of the upper chassis 10 and pressed. At this time, the hook portion 12b-1 of the lead plate 12 is simultaneously inserted into the first hole 20a and fixed so as to sandwich the thickness of the upper chassis 10 with the L-shaped hook.
And after the convex part 12b-2 and the hook part 12b-1 of the fixing | fixed part 12b are inserted by the 2nd hole 20b and the 1st hole 20a, the holding | maintenance part 12c of the rear-end part b of the lead plate 12 is shown in FIG. By further pressing as shown in (b), the convex portion 12b-2 is inserted into the third hole 20c, and the insertion is completed. Although the embodiment has been described in which the third hole 20c is provided in the upper chassis 10 and the convex portion 12b-2 is provided in the lead plate 12, the present invention is not limited to this. Alternatively, the lead plate 12 may be provided with a third hole.

次に、このようにリードプレート１２を装着した上シャシ１０は、図１に示した下シャシ２０と嵌合させることで、図６に示すように、アース接続構造として構成される。ここで、リードプレート１２は、上シャシ１０に固定された状態で接点部１２ａがシールドケース２４に接触してアース接続されており、且つ、保持部１２ｃの後端部ｂが筐体の嵌合後に収納される内部部品２６に近接して配置されて差し込み方向と逆方向に抜けることを防止することができる。
ここで、シールドケース２４は、筐体内の中央に収納される内部部品２６に対し、その周囲によけて配置されるため、本発明によれば筐体内の周囲で安全にアースすることが可能なことが理解できる。また、リードプレート１２は、図２（ａ）に示した第３穴２０ｃに、図４に示した凸部１２ｂ−２が嵌入することで差し込み方向の位置決めが行われるとともに、フック部１２ｂ−１が第１穴２０ａに嵌入することで差し込み方向と直交する左右方向の動きが抑制されて位置決めが行われ、確実に固定されることも分かる。
尚、筐体は、金属体として、例えば、リードプレート１２を固定する上シャシ１０のみが、少なくとも一部または全てを金属体にすることでアース接続できることは言うまでもない。 Next, the upper chassis 10 to which the lead plate 12 is mounted in this way is configured as a ground connection structure as shown in FIG. 6 by being engaged with the lower chassis 20 shown in FIG. Here, in the state where the lead plate 12 is fixed to the upper chassis 10, the contact portion 12a contacts the shield case 24 and is grounded, and the rear end portion b of the holding portion 12c is fitted to the housing. It can be prevented from coming out in the direction opposite to the insertion direction by being arranged in the vicinity of the internal component 26 to be stored later.
Here, since the shield case 24 is disposed around the inner part 26 housed in the center of the housing, the shield case 24 can be safely grounded around the housing according to the present invention. I can understand. Further, the lead plate 12 is positioned in the insertion direction by fitting the convex portion 12b-2 shown in FIG. 4 into the third hole 20c shown in FIG. 2A, and the hook portion 12b-1. It can also be seen that by being inserted into the first hole 20a, the movement in the left-right direction perpendicular to the insertion direction is suppressed, positioning is performed, and it is fixed securely.
Needless to say, for example, only the upper chassis 10 that fixes the lead plate 12 can be grounded by using at least a part or all of the casing as a metal body.

このように、本発明のアース接続構造によると、ネジを使用しないで保持部１２ｃを把持して一部品の差し込みで簡単に取り付けられ（部品点数の削減）、一旦組立てると筐体の外側から凸部１２ｂ−２を意図的に外そうとしない限り、確実に固定されており、仮に、凸部１２ｂ−２を外した場合でも、取り付け時に保持部１２ｃの後端部ｂのコ字状リブが、内部部品２６であるメカシャシによって移動が制限され外れることを防止できる。従って、製造工程での部品点数や工数の全体的なコスト削減を実現できる。また、リードプレート１２の組立てに見合った保持部１２ｃを持たせることで、作業性の向上と、変形や紛失がなく部品の品質維持が良くなる。   As described above, according to the ground connection structure of the present invention, the holding portion 12c can be grasped without using a screw and can be easily attached by inserting one component (reducing the number of components). Unless the part 12b-2 is intentionally removed, it is securely fixed. Even if the convex part 12b-2 is removed, the U-shaped rib of the rear end part b of the holding part 12c is not attached at the time of attachment. The movement is restricted by the mechanical chassis which is the internal component 26, and can be prevented from coming off. Therefore, the overall cost reduction of the number of parts and man-hours in the manufacturing process can be realized. Further, by providing the holding portion 12c suitable for the assembly of the lead plate 12, it is possible to improve workability and maintain the quality of parts without deformation or loss.

以上、本発明によるアース接続構造の実施形態を詳細に説明したが、本発明は前述した実施の形態に限定されるものではなく、その要旨を逸脱しない範囲で変更可能である。
例えば、車載用のカーオーディオに採用したアース接続構造の実施形態を説明したが、これに限定されるものではなく、車載用機器に限定されず、船舶や飛行機などに搭載する移動体電子器機におけるアース接続構造に採用しても良い。 As mentioned above, although the embodiment of the ground connection structure according to the present invention has been described in detail, the present invention is not limited to the embodiment described above, and can be modified without departing from the gist thereof.
For example, although the embodiment of the ground connection structure adopted in the car audio system for vehicle use has been described, the present invention is not limited to this, and is not limited to the vehicle-mounted device, but in a mobile electronic device mounted on a ship or an airplane. You may employ | adopt as a ground connection structure.

本発明によるアース接続構造の一実施形態を示す斜視図。The perspective view which shows one Embodiment of the ground connection structure by this invention. 図１に示したリードプレートの取り付け前後の状態を示す図。The figure which shows the state before and behind attachment of the lead plate shown in FIG. 図１に示したリードプレートの全体を示す斜視図。The perspective view which shows the whole lead plate shown in FIG. 図３に示したリードプレートの各細部を示す図。The figure which shows each detail of the lead plate shown in FIG. 図１に示したリードプレートの取り付け動作を示す図。The figure which shows the attachment operation | movement of the lead plate shown in FIG. 図１に示した筐体を組立てた外装全体を示す外観斜視図。The external appearance perspective view which shows the whole exterior | assembly which assembled the housing | casing shown in FIG. 従来のアース接続構造の一実施形態を示す斜視図。The perspective view which shows one Embodiment of the conventional earth connection structure. 従来のアース接続構造の他の実施形態を示す断面図。Sectional drawing which shows other embodiment of the conventional earth connection structure.

符号の説明Explanation of symbols

１０ 上シャシ
１２ リードプレート
１２ａ 接点部
１２ｂ 固定部
１２ｃ 保持部
２０ 下シャシ
２２ プリント基板
２４ シールドケース
２６ 内部部品 DESCRIPTION OF SYMBOLS 10 Upper chassis 12 Lead plate 12a Contact part 12b Fixing part 12c Holding part 20 Lower chassis 22 Printed circuit board 24 Shield case 26 Internal components

Claims (5)

一対のシャシを嵌合してなる筐体と、
前記一対のシャシいずれか一方に電子部品を内装するシールドケースを実装して固定されるプリント基板と、
前記プリント基板を固定した一方のシャシと異なる他方のシャシに固定され、板状で弾性を有して前記嵌合時にバネ圧により前記シールドケースに圧接して前記筐体とアース接続させる接点部を備え、この接点部の延在する端部に延在して前記他方のシャシに差し込まれて固定される固定部を一体に有し、前記固定部の差し込み方向の後端部と両側部とから垂直にコ字状リブを延在してなる保持部を更に一体に設けたリードプレートとを備え、
前記リードプレートは、前記他方の筐体にコ字状リブの前記保持部を把持して差し込むとともに、前記筐体の嵌合後に前記保持部の後端部が前記筐体内に収納される内部部品（メカ部品）に近接して配置されて差し込み方向と逆方向に抜けることを防止することを特徴とするアース接続構造。 A housing formed by fitting a pair of chassis;
A printed circuit board that is fixed by mounting a shield case that houses electronic components in either one of the pair of chassis,
A contact portion fixed to the other chassis different from the one chassis to which the printed circuit board is fixed, having a plate shape and having elasticity, and being brought into pressure contact with the shield case by spring pressure at the time of fitting, to be connected to the casing. A fixed portion that extends into the extending end portion of the contact portion and is fixed by being inserted into the other chassis, and includes a rear end portion and both side portions in the insertion direction of the fixed portion. A lead plate provided with a holding portion formed by extending a U-shaped rib vertically; and
The lead plate grips and inserts the holding portion of the U-shaped rib into the other housing, and the rear part of the holding portion is housed in the housing after the housing is fitted. An earth connection structure that is arranged in the vicinity of (mechanical part) and prevents it from coming out in the direction opposite to the insertion direction. 請求項１に記載のアース接続構造において、
前記リードプレートは、前記筐体に前記差し込み方向に間隔を有して開口する第１、第２、第３穴を開口し、前記固定部の先端が前記差し込み方向中央の第２穴に挿入されて前記筐体内から前方の前記第３穴に向かって押されて嵌入する凸部を有し、この凸部が前記第２穴に差し込まれる際に前記固定部の後方でＬ字状に突出して前記第１穴に挿入されて係合するフック部を備えることを特徴とするアース接続構造。 The ground connection structure according to claim 1,
The lead plate opens first, second, and third holes that open in the housing with a gap in the insertion direction, and the tip of the fixing portion is inserted into the second hole at the center in the insertion direction. A protrusion that is pushed from the inside of the housing toward the front third hole and is inserted into the second hole, and protrudes in an L shape behind the fixing portion when the protrusion is inserted into the second hole. A ground connection structure comprising a hook portion inserted into and engaged with the first hole. 請求項２に記載のアース接続構造において、
前記リードプレートは、前記凸部が前記第３穴に嵌入して差し込み方向の位置決めを行うとともに、前記フック部が前記第１穴に嵌入して差し込み方向と直交する左右方向の位置決めを行うことを特徴とするアース接続構造。 The ground connection structure according to claim 2,
In the lead plate, the convex portion is inserted into the third hole for positioning in the insertion direction, and the hook portion is inserted in the first hole for positioning in the left-right direction perpendicular to the insertion direction. Features a ground connection structure. 請求項１〜３いずれかに記載のアース接続構造において、
前記シールドケースは、前記筐体内の中央に収納される前記内部部品に対し、その周囲に配置されることを特徴とするアース接続構造。 In the earth connection structure in any one of Claims 1-3,
The ground connection structure according to claim 1, wherein the shield case is arranged around the internal component housed in the center of the housing. 請求項１〜４いずれかに記載のアース接続構造において、
前記電子部品は、チューナであることを特徴とするアース接続構造。 In the earth connection structure in any one of Claims 1-4,
The electronic component is a tuner, and a ground connection structure.
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