JP5585495B2 - Board fixing structure - Google Patents

Board fixing structure Download PDF

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JP5585495B2
JP5585495B2 JP2011045100A JP2011045100A JP5585495B2 JP 5585495 B2 JP5585495 B2 JP 5585495B2 JP 2011045100 A JP2011045100 A JP 2011045100A JP 2011045100 A JP2011045100 A JP 2011045100A JP 5585495 B2 JP5585495 B2 JP 5585495B2
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wiring board
base body
cover body
diameter
hole
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JP2012182363A (en
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陽之介 小山
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Denso Corp
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Description

本発明は、配線基板の一方の主表面をベース体、他方の主表面をカバー体でそれぞれ覆い、ベース体とカバー体とを合体した基板ケースの内部の所定位置に配線基板を保持する基板固定構造に関する。   In the present invention, one main surface of a wiring board is covered with a base body, the other main surface is covered with a cover body, and the board is fixed to hold the wiring board at a predetermined position inside the substrate case in which the base body and the cover body are combined. Concerning structure.

種々の電子機器には、機能部の作動を制御する制御信号の入出力や、外部機器、外部システムと通信用信号の入出力等を行うための配線基板を備えている。例えば、可搬式の電子機器である車両用ＥＣＵ（Electronic Control Unit：電子制御ユニット）、車両に用いるＥＴＣ（Electronic Toll Collection：自動料金収受システム）用機器（車載器等）、ＰＣ（Personal Computer：パーソナルコンピュータ）、携帯電話機、携帯情報端末器等においては、防水、防塵等の観点から、あるいは持ち運びの利便性や落下に対する安全性を考慮して、配線基板は、ベース体とカバー体とを合体した基板ケース（筐体）の内部の所定位置に保持される。   Various electronic devices are provided with a wiring board for inputting / outputting control signals for controlling the operation of the functional units, inputting / outputting signals for communication with external devices and external systems, and the like. For example, a vehicle ECU (Electronic Control Unit) that is a portable electronic device, an ETC (Electronic Toll Collection: automatic toll collection system) device (on-board device, etc.) used in a vehicle, a PC (Personal Computer: personal) In the case of computers), mobile phones, personal digital assistants, etc., from the viewpoint of waterproofing, dustproofing, etc., or considering the convenience of carrying and safety against dropping, the wiring board combines the base body and the cover body. It is held at a predetermined position inside the substrate case (housing).

ベース体、カバー体及び配線基板は、それぞれ製造時の寸法のバラツキ（寸法誤差）を有しているので、例えば、配線基板が厚み方向又は主表面と平行な方向にガタを生じた状態で、あるいは過大な応力を受けた状態でベース体に取り付けられる場合がある。配線基板において過大な応力が発生すると、半田付け部に生じたクラックにより導通不良が発生したり、実装部品に機能不全が発生したりするおそれがある。また、配線基板の取り付けにガタがあると、異音（ガタツキ音）を生じるおそれもある。   Since the base body, the cover body, and the wiring board each have a variation in dimensions at the time of manufacture (dimensional error), for example, in a state where the wiring board has a backlash in a thickness direction or a direction parallel to the main surface, Or it may be attached to a base body in the state which received the excessive stress. If excessive stress is generated in the wiring board, there is a possibility that a conduction failure may occur due to a crack generated in the soldered portion, or a malfunction may occur in the mounted component. Further, if there is play in the mounting of the wiring board, there is a possibility that abnormal noise (rattle noise) may be generated.

ところで、配線基板に細長いスリットを形成し、ベース体やカバー体にはそのスリットに挿入される板状の突起を設けることによって、配線基板を基板ケースの内部に取り付ける技術が開示されている（特許文献１〜４参照）。   By the way, a technique for attaching a wiring board to the inside of a board case by forming a long and narrow slit in the wiring board and providing a base body or a cover body with a plate-like protrusion inserted into the slit is disclosed (patent). References 1-4).

特開平８−１５３９８１号公報JP-A-8-153981 実開平３−１５７３号公報Japanese Utility Model Publication No. 3-1573 特開昭６１−８２４９８号公報JP-A-61-82498 実開昭６０−１３７８６号公報Japanese Utility Model Publication No. 60-13786

これらの文献に開示された板状の突起（及び細長いスリット）によって、配線基板を基板ケース内に取り付ける際の作業性が改善される。しかし、いずれの文献にも、この板状の突起によって配線基板を厚み方向及び主表面と平行な方向に正確に位置決めすることは考慮されておらず、依然として配線基板にはガタを生じたり、過大な応力が発生したりするおそれがある。   The plate-like projections (and elongated slits) disclosed in these documents improve the workability when the wiring board is mounted in the board case. However, none of the documents considers the precise positioning of the wiring board in the thickness direction and in the direction parallel to the main surface by the plate-like protrusions, and the wiring board is still loose or excessive. There is a risk of generating excessive stress.

本発明の課題は、配線基板をベース体及びカバー体に保持する際、これらの有する寸法のバラツキを吸収して、配線基板にガタツキや過大な応力が発生するのを防止ないし減少することのできる基板固定構造を提供することにある。   It is an object of the present invention to absorb or prevent variations in dimensions of the wiring board when the wiring board is held on the base body and the cover body, thereby preventing or reducing the occurrence of backlash or excessive stress on the wiring board. It is to provide a substrate fixing structure.

課題を解決するための手段及び発明の効果Means for Solving the Problems and Effects of the Invention

上記課題を解決するために、本発明は、
配線基板の一方の主表面をベース体、他方の主表面をカバー体でそれぞれ覆い、それらベース体とカバー体とを合体した基板ケースの内部の所定位置に前記配線基板を保持する基板固定構造であって、
前記ベース体及びカバー体には、内部に収容された前記配線基板を挟み込んで所定位置に保持する１又は複数の突出部が、それぞれ対応する主表面に向けて突出形成され、
前記ベース体及びカバー体に形成される前記突出部の先端部は、前記配線基板の両側の主表面を厚み方向に貫通し又は陥没させた被挿入部に突入するとともに、前記被挿入部への挿入状態（装着状態）においてその被挿入部の内周縁に接触するように、挿入方向において連続的に径変化する径変化部に形成され、
前記配線基板を内部に収容した状態で前記ベース体及びカバー体が合体するとき、前記径変化部が前記被挿入部に突入し前記内周縁に接触して係止することによって、厚み方向及び主表面と平行な方向への前記配線基板の移動を阻止ないし抑制し、
前記径変化部は、前記被挿入部への挿入前の状態において、前記突出部の先端へ向かうにつれて連続的に縮径する縮径部であり、前記縮径部は、前記ベース体の突出部及び前記カバー体の突出部にそれぞれ形成され、前記配線基板の被挿入部に対し軸線を一致させて、対応する主表面側からそれぞれ挿入されることを特徴とする。 In order to solve the above problems, the present invention provides:
A substrate fixing structure in which one main surface of a wiring board is covered with a base body and the other main surface is covered with a cover body, and the wiring board is held at a predetermined position inside a substrate case in which the base body and the cover body are combined. There,
In the base body and the cover body, one or a plurality of projecting portions sandwiching the wiring board accommodated therein and holding the wiring substrate in a predetermined position are formed to project toward the corresponding main surfaces,
Previous end of the protruding portion formed on the base body and the cover body is configured to rush to the inserted part of the main surface was penetrated in a thickness direction or depressions on both sides of the wiring board, to the insertion member Is formed in a diameter changing portion that continuously changes in diameter in the insertion direction so as to come into contact with the inner peripheral edge of the inserted portion in the inserted state (mounted state) of
When the base body and the cover body in a state of accommodating the wiring board inside coalesce, by the diameter change portion is locked in contact with the front Symbol the periphery projects into the insertion member, the thickness direction and Preventing or suppressing the movement of the wiring board in a direction parallel to the main surface ;
The diameter changing portion is a reduced diameter portion that continuously decreases in diameter toward the tip of the protruding portion in a state before being inserted into the insertion portion, and the reduced diameter portion is a protruding portion of the base body And formed on the projecting portion of the cover body, and inserted from the corresponding main surface side with the axis line aligned with the inserted portion of the wiring board .

このように、配線基板に形成された被挿入部に、ベース体及びカバー体に形成される突出部の先端部が突入し、挿入接触部として被挿入部の内周面又は内周縁に接触する。このとき、挿入接触部が（例えば断面円形状の）被挿入部の内周面又は内周縁に接触することによって、厚み方向及び主表面と平行な方向への配線基板の移動を全方位的に阻止ないし抑制することができる。したがって、配線基板をベース体及びカバー体に保持する際、これらが有する寸法のバラツキを被挿入部及び挿入接触部で吸収して、配線基板にガタツキや過大な応力が発生するのを防止ないし減少することができる。   In this way, the tip of the protruding portion formed on the base body and the cover body enters the inserted portion formed on the wiring board, and contacts the inner peripheral surface or inner peripheral edge of the inserted portion as an insertion contact portion. . At this time, when the insertion contact portion comes into contact with the inner peripheral surface or the inner peripheral edge of the insertion portion (for example, having a circular cross section), the movement of the wiring board in the thickness direction and the direction parallel to the main surface is omnidirectional. Can be blocked or suppressed. Therefore, when the wiring board is held on the base body and the cover body, variations in the dimensions of the wiring board are absorbed by the inserted portion and the insertion contact portion, thereby preventing or reducing the occurrence of backlash or excessive stress on the wiring substrate. can do.

しかも、被挿入部を配線基板に形成するとともに、その被挿入部に突入して内周面又は内周縁に接触可能な挿入接触部を、ベース体及びカバー体の突出部のうちの少なくともいずれか１つの先端部に形成すればよいから、配線基板の固定構造を安価に提供できる。例えば、被挿入部は、厚み方向に貫通形成された断面円形状の貫通孔、又は少なくとも一方の主表面において厚み方向に窪み形成された断面円形状の凹部とすることができる。また、挿入接触部は、このような貫通孔や凹部に突入し、挿入状態（装着状態）で貫通孔や凹部の内周面又は内周縁に接触して係止する各種形状のリブであってもよい。   In addition, the insertion portion is formed on the wiring board, and the insertion contact portion that enters the insertion portion and can contact the inner peripheral surface or the inner peripheral edge is at least one of the protrusions of the base body and the cover body. Since it suffices to form it at one tip portion, a fixing structure for the wiring board can be provided at low cost. For example, the inserted portion may be a through hole having a circular cross section formed through in the thickness direction, or a concave section having a circular cross section formed in the thickness direction on at least one main surface. Further, the insertion contact portion is a rib of various shapes that enters into such a through-hole or recess and contacts and locks the inner peripheral surface or inner periphery of the through-hole or recess in the inserted state (mounted state). Also good.

なお、ベース体の端部とカバー体の端部とのうち、一方（例えばベース体の端部）に小径部、他方（例えばカバー体の端部）に大径部をそれぞれ全周にわたり形成し、これら小径部と大径部とを軸方向から嵌合して固定する場合がある。この場合、小径部（又は大径部）を径方向内側（又は径方向外側）へ弾性変形させておき、弾性復帰させて嵌合すると、両者を締まり嵌め状態で固定することができる。このように、ベース体とカバー体との嵌合固定手段を用いることによって、配線基板とベース体又はカバー体との取り付け、及びベース体とカバー体との取り付けに、ビス等の締結部材が不要となる。   Of the end portion of the base body and the end portion of the cover body, a small diameter portion is formed on one side (for example, the end portion of the base body), and a large diameter portion is formed on the other (for example, the end portion of the cover body). In some cases, the small diameter portion and the large diameter portion are fitted and fixed from the axial direction. In this case, if the small diameter part (or the large diameter part) is elastically deformed radially inward (or radially outward) and then fitted back after elastic recovery, both can be fixed in an interference fit. In this way, by using the fitting and fixing means between the base body and the cover body, a fastening member such as a screw is not required for mounting the wiring board to the base body or the cover body and mounting the base body to the cover body. It becomes.

被挿入部は配線基板を厚み方向に貫通する断面円形状の貫通孔として形成される一方、
突出部の挿入接触部は、線基板の貫通孔に突入するとともに、その貫通孔への挿入状態（装着状態）において、その貫通孔の内周縁に対し斜め交差状に接触するように、挿入方向において連続的に径変化する径変化部として形成され、
配線基板を内部に収容した状態でベース体及びカバー体が合体するとき、径変化部が貫通孔に突入し内周縁に接触して係止することによって、厚み方向及び主表面と平行な方向への配線基板の移動を阻止ないし抑制する。 While the inserted portion is formed as a through hole having a circular cross section that penetrates the wiring board in the thickness direction,
The insertion contact portion of the projecting portion enters the through hole of the wire board, and in the insertion state (attached state) to the through hole, the insertion direction is so as to contact with the inner peripheral edge of the through hole in an obliquely intersecting manner. Is formed as a diameter changing portion continuously changing in diameter,
When the base body and the cover body are combined while the wiring board is housed inside, the diameter changing portion enters the through hole and contacts and locks the inner peripheral edge so that the thickness direction and the direction parallel to the main surface are obtained. This prevents or suppresses the movement of the wiring board.

被挿入部が断面円形状の貫通孔（すなわち丸孔）として形成され、挿入接触部が挿入方向において連続的に径変化する径変化部として形成される場合には、径変化部が貫通孔に突入する際に、径変化部が貫通孔の内周縁に接触して係止する。これによって、貫通孔への突入時及び貫通孔への挿入状態のいずれにおいても、径変化部（挿入接触部）は貫通孔の内周縁に接触するので、配線基板はベース体及びカバー体の突出部によって安定して保持される。   When the inserted portion is formed as a through hole having a circular cross section (that is, a round hole) and the insertion contact portion is formed as a diameter changing portion that continuously changes in diameter in the inserting direction, the diameter changing portion is formed in the through hole. When entering, the diameter changing portion comes into contact with the inner peripheral edge of the through hole and is locked. As a result, the diameter changing portion (insertion contact portion) is in contact with the inner peripheral edge of the through-hole both when entering the through-hole and when inserted into the through-hole, so that the wiring board protrudes from the base body and the cover body. It is stably held by the part.

さらに、基板検査時に配線基板をセット（位置決め）するために設けられた、既存の貫通孔を被挿入部に兼用（共用）することが可能であり、この場合には配線基板の固定構造を一層安価に提供できる。なお、この貫通孔は検査時の誤セットや製造時の誤組み付け防止のために、１個だけ又は個々に、径の大きさを変えたり、配線基板における配置位置を変えたりする場合がある。   Furthermore, the existing through-hole provided for setting (positioning) the wiring board during board inspection can also be used (shared) as the insertion portion. In this case, the wiring board fixing structure can be further increased. Can be provided at low cost. In order to prevent erroneous setting during inspection or incorrect assembly during manufacturing, the diameter of the through hole may be changed or the arrangement position on the wiring board may be changed individually or individually.

具体的には、径変化部が、貫通孔への挿入前の状態（未装着状態）において、突出部の先端へ向かうにつれて連続的に縮径する縮径部であると、連続的な縮径形状により操作力（挿入力）が軽減するので、軽い操作力で貫通孔へ円滑に挿入できる。   Specifically, when the diameter changing portion is a reduced diameter portion that continuously reduces in diameter as it goes toward the tip of the protruding portion in a state before being inserted into the through hole (non-attached state), continuous diameter reduction is performed. Since the operation force (insertion force) is reduced by the shape, it can be smoothly inserted into the through-hole with a light operation force.

例えば、上記縮径部は、ベース体及びカバー体に形成される突出部のうちのいずれか一方（例えばベース体側の突出部）から、貫通孔の内周縁に接触するように立ち上がる円錐状のリブとして形成される。なお、ベース体及びカバー体に形成される突出部のうちのいずれか他方のもの（例えばカバー体側の突出部）は、貫通孔の内周縁には接触せず、貫通孔の周囲（外周縁部）を押圧する。   For example, the reduced diameter portion is a conical rib that rises from one of the protrusions formed on the base body and the cover body (for example, the protrusion on the base body side) so as to contact the inner periphery of the through hole. Formed as. Note that the other of the protrusions formed on the base body and the cover body (for example, the protrusion on the cover body side) does not contact the inner periphery of the through hole, and the periphery of the through hole (the outer periphery) ).

縮径部が、ベース体の突出部及びカバー体の突出部にそれぞれ形成され、配線基板の貫通孔に対し軸線を一致させて、対応する主表面側からそれぞれ挿入される場合には、配線基板に対して全方位的な移動阻止ないし抑制を確実に及ぼすことができる。   In the case where the reduced diameter portion is formed in each of the protruding portion of the base body and the protruding portion of the cover body and is inserted from the corresponding main surface side with the axis line aligned with the through hole of the wiring substrate, It is possible to reliably prevent or suppress omnidirectional movement.

例えば、上記縮径部は、ベース体及びカバー体に形成される突出部のうちの双方から、貫通孔の内周縁に接触するようにそれぞれ立ち上がる円錐状の双頭リブ（両側リブ）として形成される。   For example, the reduced diameter portion is formed as a conical double-headed rib (both side ribs) that rises from both of the protrusions formed on the base body and the cover body so as to contact the inner peripheral edge of the through hole. .

あるいは、径変化部が、貫通孔への挿入状態（装着状態）において、突出部の先端へ向かうにつれて軸線から遠ざかり花びら状に広がるように周方向に複数の接触片に分割して形成された拡径部である場合には、複数の接触片に操作力（挿入力）が分散するので、軽い操作力で貫通孔へ円滑に挿入できる。   Alternatively, in the insertion state (attachment state) of the through hole, the diameter changing portion is formed by dividing the contact portion into a plurality of contact pieces in the circumferential direction so as to move away from the axis and spread in a petal shape toward the tip of the protruding portion. In the case of the diameter portion, since the operation force (insertion force) is dispersed in the plurality of contact pieces, it can be smoothly inserted into the through hole with a light operation force.

例えば、上記拡径部は、ベース体及びカバー体に形成される突出部のうちのいずれか一方（例えばベース体側の突出部）から、貫通孔への挿入状態において貫通孔の内周縁に接触するように、周方向に複数の接触片に分割した開きリブに形成される。なお、ベース体及びカバー体に形成される突出部のうちのいずれか他方のもの（例えばカバー体側の突出部）は、環状に配置された複数の接触片の中央部に突入し、複数の接触片を弾性変形により花びら状に広げて、貫通孔の内周縁に係止させる。   For example, the enlarged diameter portion comes into contact with the inner peripheral edge of the through hole from one of the protrusions formed on the base body and the cover body (for example, the protrusion on the base body side) in the inserted state into the through hole. Thus, it forms in the open rib divided | segmented into the some contact piece in the circumferential direction. One of the protrusions formed on the base body and the cover body (for example, the protrusion on the cover body side) protrudes into the center of a plurality of contact pieces arranged in an annular shape, and a plurality of contacts The piece is spread in the shape of a petal by elastic deformation and is locked to the inner periphery of the through hole.

さらに、被挿入部は配線基板を厚み方向に貫通する断面円形状の貫通孔として形成される一方、突出部の挿入接触部は、周方向に複数の接触片に分割して形成され、配線基板を内部に収容した状態でベース体及びカバー体が合体するとき、複数の接触片は、貫通孔の内周面に接触して弾性変形により先端へ向かうにつれて軸線に近づくように縮径することによって貫通孔に突入し、かつ弾性復帰により内周面又は内周縁に係止することによって厚み方向及び主表面と平行な方向への配線基板の移動を阻止ないし抑制する。この場合にも、複数の接触片に操作力（挿入力）が分散するので、軽い操作力で貫通孔へ円滑に挿入できる。   Further, the insertion portion is formed as a through hole having a circular cross section that penetrates the wiring board in the thickness direction, while the insertion contact portion of the protruding portion is formed by dividing the contact portion into a plurality of contact pieces in the circumferential direction. When the base body and the cover body are combined with each other in a state in which the plurality of contact pieces are accommodated, the plurality of contact pieces come into contact with the inner peripheral surface of the through hole and are reduced in diameter so as to approach the axis line toward the tip by elastic deformation. By moving into the through hole and engaging with the inner peripheral surface or the inner peripheral edge by elastic return, the movement of the wiring board in the thickness direction and the direction parallel to the main surface is prevented or suppressed. Also in this case, since the operation force (insertion force) is distributed to the plurality of contact pieces, it can be smoothly inserted into the through hole with a light operation force.

例えば、上記挿入接触部は、ベース体及びカバー体に形成される突出部のうちのいずれか一方（例えばベース体側の突出部）から、周方向に複数の接触片に分割して形成され、複数の接触片は、貫通孔への突入時に貫通孔の内周面又は内周縁に接触して弾性変形により縮径し、貫通孔への挿入状態において弾性復帰により貫通孔の内周面又は内周縁に係止する閉じリブに形成される。なお、ベース体及びカバー体に形成される突出部のうちのいずれか他方（例えばカバー体側の突出部）の突出部が、環状に配置された複数の接触片の中央部に突入して複数の接触片の縮径を停止する。   For example, the insertion contact portion is formed by dividing one of the protrusions formed on the base body and the cover body (for example, the protrusion on the base body side) into a plurality of contact pieces in the circumferential direction. The contact piece contacts the inner peripheral surface or inner peripheral edge of the through-hole when entering the through-hole and contracts the diameter by elastic deformation, and when inserted into the through-hole, the inner peripheral surface or inner peripheral edge of the through-hole by elastic return It is formed in the closing rib which latches to. Of the protrusions formed on the base body and the cover body, the other protrusion (for example, the protrusion on the cover body side) protrudes into the center of a plurality of contact pieces arranged in a ring shape, and a plurality of protrusions are formed. Stop the diameter reduction of the contact piece.

被挿入部及び挿入接触部は複数組設けられ、配線基板の厚み方向から見たとき、矩形状の外形を有する配線基板の対角線に沿って、又はいずれかの辺に沿って配置されている。   A plurality of sets of inserted portions and insertion contact portions are provided, and are arranged along a diagonal line of the wiring board having a rectangular outer shape or along one of the sides when viewed from the thickness direction of the wiring board.

被挿入部及び挿入接触部を複数組設け、矩形状の配線基板の対角線又は１辺に沿って配置することによって、配線基板の位置決めがさらに確実かつ容易になる。なお、ベース体、カバー体（及び基板ケース）の外形は矩形状でなくてもよい。   By providing a plurality of sets of inserted parts and insertion contact parts and arranging them along the diagonal line or one side of the rectangular wiring board, the wiring board can be positioned more reliably and easily. Note that the outer shape of the base body and the cover body (and the substrate case) may not be rectangular.

基板固定構造の参考例を模式的に示す平面断面図及び正面断面図。 The cross-sectional view and front sectional view schematically showing a reference example of the substrate fixing structure. 配線基板に形成された貫通孔の孔径が変化した場合の説明図。Explanatory drawing when the hole diameter of the through-hole formed in the wiring board changes. 図１の第１変形例を模式的に示す正面断面図及び底面断面図。The front sectional view and bottom surface sectional view which show typically the 1st modification of FIG. 図１の第２変形例を模式的に示す平面断面図及び正面断面図。The plane sectional view and front sectional view showing typically the 2nd modification of Drawing 1. 図１の第３変形例を模式的に示す平面断面図及び正面断面図。The plane sectional view and front sectional view showing typically the 3rd modification of Drawing 1. 図１の第４変形例を模式的に示す正面断面図。Front sectional drawing which shows typically the 4th modification of FIG. 本発明に係る基板固定構造の一例を模式的に示す平面断面図及び正面断面図。The plane sectional view and front sectional view showing typically an example of the substrate fixing structure concerning the present invention. 図７の第１変形実施例を模式的に示す正面断面図及び底面断面図。Front sectional view and a bottom cross-sectional view of the first modified embodiment shown schematically in FIG. 図７の第２変形実施例を模式的に示す平面断面図及び正面断面図。Plan sectional view and a front sectional view of the second modification example is shown schematically in FIG. 図７の第３変形実施例を模式的に示す正面断面図。Front sectional view schematically showing a third modified embodiment of FIG. 基板固定構造の他の参考例を模式的に示す平面断面図及び正面断面図。 The plane sectional view and front sectional view showing typically other reference examples of a substrate fixing structure . 接触片が開く様子の説明図。Explanatory drawing of a mode that a contact piece opens. 図１１の変形例を模式的に示す平面断面図及び正面断面図。The plane sectional view and front sectional view which show typically the modification of Drawing 11. 基板固定構造のさらに他の参考例を模式的に示す正面図。 The front view which shows typically the other reference example of a board | substrate fixed structure.

（参考例１）
以下、本発明の前提となる参考形態及び本発明の実施の形態につき、各々図面に示す参考例及び実施例を参照して説明する。図１は基板固定構造の参考例を模式的に示す平面断面図及び正面断面図である。図１に示す配線基板１は平面視でやや横長矩形状であり、第一主表面（ここでは下面）１ａが下方に位置するベース体２、第二主表面（ここでは上面）１ｂが上方に位置するカバー体３でそれぞれ覆われ、それらベース体２とカバー体３とを合体した直方体形状の基板ケースＣの内部における所定の位置に、以下に述べる基板固定構造によって保持されている。配線基板１は、例えば車両用ＥＣＵ基板であり、その下面１ａ及び上面１ｂには、配線パターンが印刷され、種々のディスクリート回路が実装されている。ベース体２及びカバー体３は、平面視で配線基板１と相似な（やや横長の）矩形状であり、配線基板１はベース体２又はカバー体３（基板ケースＣ）の各側壁から所定距離離間して配置されている。 ( Reference Example 1)
Hereinafter, embodiments of the premise made reference embodiment and the present invention of the present invention will be described with reference to Reference Examples and Examples, respectively shown in the drawings. FIG. 1 is a plan sectional view and a front sectional view schematically showing a reference example of a substrate fixing structure. The wiring board 1 shown in FIG. 1 has a slightly oblong rectangular shape in a plan view, and a base body 2 having a first main surface (here, a lower surface) 1a positioned downward, and a second main surface (here, an upper surface) 1b facing upward. Each of the cover bodies 3 is covered, and is held at a predetermined position inside a rectangular parallelepiped substrate case C in which the base body 2 and the cover body 3 are combined by a substrate fixing structure described below. The wiring board 1 is, for example, a vehicle ECU board, and a wiring pattern is printed on the lower surface 1a and the upper surface 1b, and various discrete circuits are mounted. The base body 2 and the cover body 3 have a rectangular shape (slightly long) similar to the wiring board 1 in plan view, and the wiring board 1 is a predetermined distance from each side wall of the base body 2 or the cover body 3 (board case C). They are spaced apart.

合成樹脂製のベース体２には、底壁２ａと一体成形された複数（図では４個）の突出部２１が、配線基板１の下面１ａに向けて（例えば柱状に）突出している。合成樹脂製のカバー体３には、天井壁３ａと一体成形された複数（図では４個）の突出部３１が、配線基板１の上面１ｂに向けて（例えば半円筒状に）突出している。カバー体３の突出部３１とベース体２の突出部２１とは、配線基板１を上下から挟み込んで所定の位置に保持する。   In the base body 2 made of synthetic resin, a plurality of (four in the figure) protruding portions 21 integrally formed with the bottom wall 2a protrude toward the lower surface 1a of the wiring board 1 (for example, in a columnar shape). A plurality of (four in the figure) protruding portions 31 integrally formed with the ceiling wall 3a protrude toward the upper surface 1b of the wiring board 1 (for example, in a semicylindrical shape) on the synthetic resin cover body 3. . The protruding portion 31 of the cover body 3 and the protruding portion 21 of the base body 2 hold the wiring board 1 from above and below and hold it in a predetermined position.

具体的には、配線基板１には、厚み方向に貫通する断面円形状の貫通孔１１（丸孔）が、角隅部に１個ずつ（計４個）突出部２１，３１に対応して形成されている。また、ベース体２側の突出部２１の先端部は、円形状の断面を有するとともに、先端（図では上端）へ向かうにつれて連続的に縮径する（すなわち先細になる）縮径部としての円錐状リブ２２に形成されている。この円錐状リブ２２は、先端から配線基板１の貫通孔１１に対し軸線を一致させて突入するとともに、貫通孔１１への挿入状態（装着状態）において、貫通孔１１の挿入側内周縁（図では下側内周縁）に対し斜め交差状に接触するように、挿入方向において連続的に径変化する径変化部でもある。   Specifically, the wiring board 1 has circular through-holes 11 (round holes) penetrating in the thickness direction, one for each corner (four in total) corresponding to the protrusions 21 and 31. Is formed. The tip of the protrusion 21 on the side of the base body 2 has a circular cross section, and a cone as a reduced diameter portion that continuously decreases in diameter (that is, tapers) toward the tip (upper end in the figure). The ribs 22 are formed. The conical rib 22 protrudes from the front end with the axis line coincident with the through hole 11 of the wiring board 1, and in the inserted state (attached state) into the through hole 11, the insertion side inner peripheral edge (see FIG. Then, it is also a diameter changing portion that continuously changes in diameter in the insertion direction so as to come into contact with the lower inner peripheral edge) in an obliquely intersecting manner.

したがって、円錐状リブ２２は、被挿入部である貫通孔１１の下側内周縁に接触して係止することにより、挿入接触部として、厚み方向（図では上下方向）及び主表面１ａ，１ｂと平行な方向（図では水平方向）への配線基板１の移動を阻止ないし抑制する機能を有する。なお、カバー体３側の突出部３１の先端部は、配線基板１の上面１ｂにおいて貫通孔１１の周囲（すなわち上側外周縁部；ひいては円錐状リブ２２の周辺）を押圧することにより、配線基板１の移動阻止ないし抑制を補助する機能を有する。このように、円錐状リブ２２及び突出部３１による配線基板１の移動阻止機能によって、配線基板１とベース体２又はカバー体３との取り付けにビス等の締結部材が不要となる。   Therefore, the conical rib 22 is brought into contact with the lower inner peripheral edge of the through-hole 11 which is the inserted portion and locked, thereby serving as an insertion contact portion in the thickness direction (vertical direction in the drawing) and the main surfaces 1a and 1b. Has a function of preventing or suppressing the movement of the wiring board 1 in a direction parallel to the horizontal direction (horizontal direction in the figure). The tip of the protrusion 31 on the cover body 3 side presses the periphery of the through-hole 11 (that is, the periphery of the upper outer peripheral edge; and thus the periphery of the conical rib 22) on the upper surface 1 b of the wiring substrate 1. 1 has a function of assisting in preventing or suppressing movement. As described above, the function of preventing the movement of the wiring board 1 by the conical rib 22 and the protruding portion 31 eliminates the need for a fastening member such as a screw to attach the wiring board 1 to the base body 2 or the cover body 3.

さらに、ベース体２の上端部に小径部２ｂ、カバー体３の下端部に大径部３ｂをそれぞれ全周にわたり形成し、これら小径部２ｂと大径部３ｂとを軸方向（上下方向）から嵌合して固定し、ベース体２とカバー体３とを合体して基板ケースＣとする。このとき、大径部３ｂが径方向外側へ（又は小径部２ｂが径方向内側へ）弾性変形した後、弾性復帰して小径部２ｂ（又は大径部３ｂ）に嵌合すると、両者を締まり嵌め状態で固定することができる。このように、小径部２ｂと大径部３ｂとの嵌合固定手段を用いることによって、ベース体２とカバー体３との取り付けにビス等の締結部材が不要となる。   Further, a small-diameter portion 2b is formed on the upper end portion of the base body 2 and a large-diameter portion 3b is formed on the lower end portion of the cover body 3 over the entire circumference, and the small-diameter portion 2b and the large-diameter portion 3b are formed from the axial direction (vertical direction). The base body 2 and the cover body 3 are combined to form a substrate case C. At this time, after the large-diameter portion 3b is elastically deformed radially outward (or the small-diameter portion 2b is radially inward) and then elastically restored and fitted into the small-diameter portion 2b (or large-diameter portion 3b), both are tightened. It can be fixed in the fitted state. As described above, by using the fitting and fixing means for the small diameter portion 2b and the large diameter portion 3b, a fastening member such as a screw is not required for mounting the base body 2 and the cover body 3.

このように、配線基板１に形成された貫通孔１１に、ベース体２の突出部２１に形成された円錐状リブ２２が突入し、貫通孔１１の下側内周縁に接触して係止することによって、厚み方向及び水平方向への配線基板１の移動を全方位的に阻止ないし抑制することができる。したがって、配線基板１をベース体２及びカバー体３に保持する際、これらが有する寸法のバラツキを貫通孔１１及び円錐状リブ２２で吸収して、配線基板１にガタツキや過大な応力が発生するのを防止ないし減少することができる。しかも、貫通孔１１を配線基板１に形成するとともに、その貫通孔１１に突入して下側内周縁に接触可能な円錐状リブ２２を、ベース体２の突出部２１の先端部に形成すればよいので、配線基板１の固定構造を安価に提供できる。   As described above, the conical rib 22 formed in the protruding portion 21 of the base body 2 enters the through hole 11 formed in the wiring board 1, and comes into contact with and locks to the lower inner peripheral edge of the through hole 11. Thus, the movement of the wiring board 1 in the thickness direction and the horizontal direction can be prevented or suppressed in all directions. Therefore, when the wiring board 1 is held by the base body 2 and the cover body 3, variations in the dimensions of the wiring board 1 are absorbed by the through-holes 11 and the conical ribs 22, and rattling and excessive stress are generated in the wiring board 1. Can be prevented or reduced. Moreover, if the through-hole 11 is formed in the wiring substrate 1 and the conical rib 22 that enters the through-hole 11 and can contact the lower inner peripheral edge is formed at the tip of the protruding portion 21 of the base body 2. Since it is good, the fixing structure of the wiring board 1 can be provided at low cost.

さらに、図２に示すように、仕様変更等によって、配線基板１に形成された貫通孔１１の孔径が変化（拡大又は縮小）した場合でも、円錐状リブ２２の傾斜面（テーパー面）が貫通孔１１の下側内周縁に接触して係止するので、配線基板１を水平状態に維持しつつ安定して保持できる。なお、図２では孔径がＤ１からＤ２に拡大した場合を示している。   Further, as shown in FIG. 2, even when the hole diameter of the through hole 11 formed in the wiring board 1 is changed (enlarged or reduced) due to a specification change or the like, the inclined surface (tapered surface) of the conical rib 22 penetrates. Since the lower inner peripheral edge of the hole 11 is brought into contact and locked, the wiring board 1 can be stably held while being maintained in a horizontal state. FIG. 2 shows a case where the hole diameter is expanded from D1 to D2.

図１に戻り、貫通孔１１と円錐状リブ２２との組み合わせは、矩形状の配線基板１の四隅に位置しているので、上記組み合わせは、配線基板１の対角線に沿って配置されていると見ることもでき、あるいは配線基板１の各辺に沿って配置されていると見ることもできる。検査時の誤セットや製造時の誤組み付け防止のために、いずれか１個の組み合わせ又は個々の組み合わせにおいて、径の大きさを変えたり、配線基板１における配置位置を変えたりする場合がある。なお、基板検査時に配線基板１をセット（位置決め）するために設けられた、既存の貫通孔を基板固定構造に兼用（共用）することが可能であり、この場合には基板固定構造を一層安価に提供できる。また、カバー体３側の突出部３１も矩形状の配線基板１の四隅に位置しているので、突出部３１は、配線基板１の対角線に沿って配置されていると見ることもでき、あるいは配線基板１の各辺に沿って配置されていると見ることもできる。   Returning to FIG. 1, the combination of the through hole 11 and the conical rib 22 is located at the four corners of the rectangular wiring board 1, and therefore, the combination is arranged along the diagonal line of the wiring board 1. It can also be seen, or can be seen as being arranged along each side of the wiring board 1. In order to prevent erroneous setting at the time of inspection or erroneous assembly at the time of manufacture, the size of the diameter may be changed or the arrangement position on the wiring board 1 may be changed in any one combination or individual combination. The existing through-hole provided for setting (positioning) the wiring board 1 at the time of board inspection can also be used (shared) as the board fixing structure. In this case, the board fixing structure is further inexpensive. Can be provided. In addition, since the protrusions 31 on the cover body 3 side are also located at the four corners of the rectangular wiring board 1, the protrusions 31 can be regarded as being arranged along the diagonal lines of the wiring board 1, or It can also be viewed as being arranged along each side of the wiring board 1.

（変形例１−１）
図３は図１の第１変形例を模式的に示す正面断面図及び底面断面図である。この変形例では、カバー体３側の突出部３１の先端部が、円形状の断面を有するとともに、先端（図では下端）へ向かうにつれて連続的に縮径する（すなわち先細になる）縮径部としての円錐状リブ３２に形成されている。この円錐状リブ３２は、先端から配線基板１の貫通孔１１に対し軸線を一致させて突入するとともに、貫通孔１１への挿入状態（装着状態）において、貫通孔１１の挿入側内周縁（図では上側内周縁）に対し斜め交差状に接触するように、挿入方向において連続的に径変化する径変化部でもある。 (Modification 1-1)
FIG. 3 is a front sectional view and a bottom sectional view schematically showing a first modification of FIG. In this modified example, the distal end portion of the protruding portion 31 on the cover body 3 side has a circular cross section, and the diameter-reduced portion is continuously reduced in diameter (that is, tapered) toward the tip (lower end in the drawing). As a conical rib 32. The conical rib 32 protrudes from the tip with the axis line aligned with the through hole 11 of the wiring board 1, and in the inserted state (attached state) into the through hole 11, the insertion side inner peripheral edge (see FIG. Then, it is also a diameter changing portion that continuously changes in diameter in the insertion direction so as to come into contact with the upper inner peripheral edge) in an obliquely intersecting manner.

したがって、円錐状リブ３２は、被挿入部である貫通孔１１の上側内周縁に接触して係止することにより、挿入接触部として、厚み方向（図では上下方向）及び主表面１ａ，１ｂと平行な方向（図では水平方向）への配線基板１の移動を阻止ないし抑制する機能を有する。なお、ベース体２側の突出部２１の先端部は、配線基板１の下面１ａにおいて貫通孔１１の周囲（すなわち下側外周縁部；ひいては円錐状リブ２２の周辺）を押圧することにより、配線基板１の移動阻止ないし抑制を補助する機能を有する。円錐状リブ３２及び突出部２１による配線基板１の移動阻止機能によって、配線基板１とベース体２又はカバー体３との取り付けにビス等の締結部材が不要となる。   Therefore, the conical rib 32 contacts and locks the upper inner periphery of the through-hole 11 that is the inserted portion, thereby serving as the insertion contact portion in the thickness direction (vertical direction in the figure) and the main surfaces 1a and 1b. It has a function of preventing or suppressing the movement of the wiring board 1 in a parallel direction (horizontal direction in the figure). The tip of the protruding portion 21 on the side of the base body 2 presses the periphery of the through hole 11 (that is, the lower outer peripheral edge; and thus the periphery of the conical rib 22) on the lower surface 1 a of the wiring substrate 1. It has a function of assisting in preventing or suppressing the movement of the substrate 1. Due to the function of preventing the movement of the wiring board 1 by the conical rib 32 and the protruding portion 21, a fastening member such as a screw is not required for the attachment of the wiring board 1 and the base body 2 or the cover body 3.

このように、配線基板１に形成された貫通孔１１に、カバー体３の突出部３１に形成された円錐状リブ３２が突入し、貫通孔１１の上側内周縁に接触して係止することによって、厚み方向及び水平方向への配線基板１の移動を全方位的に阻止ないし抑制することができる。したがって、配線基板１をベース体２及びカバー体３に保持する際、これらが有する寸法のバラツキを貫通孔１１及び円錐状リブ３２で吸収して、配線基板１にガタツキや過大な応力が発生するのを防止ないし減少することができる。しかも、貫通孔１１を配線基板１に形成するとともに、その貫通孔１１に突入して上側内周縁に接触可能な円錐状リブ３２を、カバー体３の突出部３１の先端部に形成すればよいので、配線基板１の固定構造を安価に提供できる。   In this way, the conical rib 32 formed in the protruding portion 31 of the cover body 3 enters the through hole 11 formed in the wiring board 1, and comes into contact with and latches on the upper inner periphery of the through hole 11. Thus, the movement of the wiring board 1 in the thickness direction and the horizontal direction can be prevented or suppressed in all directions. Therefore, when the wiring board 1 is held by the base body 2 and the cover body 3, variations in the dimensions of the wiring board 1 are absorbed by the through-holes 11 and the conical ribs 32, and rattling and excessive stress are generated in the wiring board 1. Can be prevented or reduced. In addition, the through-hole 11 is formed in the wiring board 1, and the conical rib 32 that enters the through-hole 11 and can come into contact with the upper inner peripheral edge may be formed at the distal end portion of the protruding portion 31 of the cover body 3. Therefore, the fixing structure of the wiring board 1 can be provided at a low cost.

上記した通り、貫通孔１１に突入する円錐状リブがカバー体３側の突出部３１に設けられる場合であっても、ベース体２側の突出部２１に設けられる場合と同等な移動阻止機能を有し、同様の作用効果が得られる。すなわち、円錐状リブがベース体２側、カバー体３側のいずれに設けられるかは、基板固定構造において本質的な事項ではない。 As described above, even when the conical rib that enters the through hole 11 is provided in the protruding portion 31 on the cover body 3 side, the same movement prevention function as that provided in the protruding portion 21 on the base body 2 side is provided. Have the same effect. That is, whether the conical rib is provided on the base body 2 side or the cover body 3 side is not an essential matter in the substrate fixing structure .

（変形例１−２）
図４は図１の第２変形例を模式的に示す平面断面図及び正面断面図である。この変形例では、ベース体２及びカバー体３は、図１と同様に平面視でやや横長矩形状であるが、配線基板１は平面視でやや縦長の矩形状である。したがって、ベース体２又はカバー体３（基板ケースＣ）のいずれかの側壁と配線基板１との離間距離は、他の側壁と配線基板１との離間距離よりも相当大きくなる。しかし、配線基板１の形状、あるいはベース体２及びカバー体３の形状が変化しても、図４に示す基板固定構造は参考例１（図１）と同様である。すなわち、配線基板１、ベース体２、カバー体３の個々の形状は、基板固定構造において本質的な事項ではない。 (Modification 1-2)
FIG. 4 is a plan sectional view and a front sectional view schematically showing a second modification of FIG. In this modified example, the base body 2 and the cover body 3 have a slightly horizontally long rectangular shape in plan view as in FIG. 1, but the wiring board 1 has a slightly vertically long rectangular shape in plan view. Therefore, the distance between the side wall of either the base body 2 or the cover body 3 (board case C) and the wiring board 1 is considerably larger than the distance between the other side wall and the wiring board 1. However, even if the shape of the wiring substrate 1 or the shapes of the base body 2 and the cover body 3 change, the substrate fixing structure shown in FIG. 4 is the same as that of the reference example 1 (FIG. 1). That is, the individual shapes of the wiring board 1, the base body 2, and the cover body 3 are not essential matters in the board fixing structure .

（変形例１−３）
図５は図１の第３変形例を模式的に示す平面断面図及び正面断面図である。この変形例では、貫通孔１１と円錐状リブ２２との組み合わせは、矩形状の配線基板１の一方の対角線に沿って２ヶ所配置されている。そして、矩形状の配線基板１の他方の対角線が通る２ヶ所の角隅部には、ベース体２の底壁２ａから立設された基板受け部２ｃが配置されている。この基板受け部２ｃは、配線基板１の下面１ａ（及び外周面）を下側から保持することにより、主として配線基板１の厚み方向への移動を阻止ないし抑制する機能を有する。なお、カバー体３側の突出部３１も、貫通孔１１と円錐状リブ２２との組み合わせの配置位置近傍に２ヶ所設けられている。 (Modification 1-3)
FIG. 5 is a plan sectional view and a front sectional view schematically showing a third modification of FIG. In this modification, two combinations of the through hole 11 and the conical rib 22 are arranged along one diagonal line of the rectangular wiring board 1. And the board | substrate receiving part 2c erected from the bottom wall 2a of the base body 2 is arrange | positioned in the two corners where the other diagonal of the rectangular wiring board 1 passes. The substrate receiving portion 2c mainly has a function of preventing or suppressing the movement of the wiring board 1 in the thickness direction by holding the lower surface 1a (and the outer peripheral surface) of the wiring board 1 from the lower side. Two protrusions 31 on the cover body 3 side are also provided in the vicinity of the arrangement position of the combination of the through hole 11 and the conical rib 22.

しかし、貫通孔１１と円錐状リブ２２との組み合わせ個数が変化しても、図５に示す基板固定構造は参考例１（図１）と同様である。すなわち、貫通孔１１と円錐状リブ２２との組み合わせ個数は、基板固定構造において本質的な事項ではない。 However, even if the number of combinations of the through holes 11 and the conical ribs 22 is changed, the substrate fixing structure shown in FIG. 5 is the same as that of the reference example 1 (FIG. 1). That is, the number of combinations of the through holes 11 and the conical ribs 22 is not an essential matter in the substrate fixing structure .

（変形例１−４）
図６は図１の第４変形例を模式的に示す正面断面図である。この変形例では、配線基板１の主表面１ａ，１ｂを厚み方向に貫通する断面円形状の貫通孔の代わりに、配線基板１の下面１ａ（第一主表面）を厚み方向に陥没させてくぼみ形成された断面円形状の凹部１２が設けられている。 (Modification 1-4)
FIG. 6 is a front sectional view schematically showing a fourth modification of FIG. In this modified example, instead of the through hole having a circular cross section penetrating the main surfaces 1a and 1b of the wiring board 1 in the thickness direction, the bottom surface 1a (first main surface) of the wiring board 1 is depressed in the thickness direction and is recessed. A formed recess 12 having a circular cross section is provided.

したがって、円錐状リブ２２は、被挿入部である凹部１２の下側内周縁に接触して係止することにより、挿入接触部として、厚み方向（図では上下方向）及び主表面１ａ，１ｂと平行な方向（図では水平方向）への配線基板１の移動を阻止ないし抑制する機能を有する。なお、カバー体３側の突出部３１の先端部は、配線基板１の上面１ｂ（下方に位置する円錐状リブ２２の周辺）を押圧することにより、配線基板１の移動阻止ないし抑制を補助する機能を有する。この変形例においても、円錐状リブ２２及び突出部３１による配線基板１の移動阻止機能によって、配線基板１とベース体２又はカバー体３との取り付けにビス等の締結部材が不要となる。   Therefore, the conical rib 22 contacts and locks the lower inner peripheral edge of the recess 12 that is the inserted portion, so that as the insertion contact portion, the thickness direction (vertical direction in the drawing) and the main surfaces 1a and 1b It has a function of preventing or suppressing the movement of the wiring board 1 in a parallel direction (horizontal direction in the figure). The tip of the protrusion 31 on the cover body 3 side assists in preventing or suppressing the movement of the wiring board 1 by pressing the upper surface 1b of the wiring board 1 (the periphery of the conical rib 22 positioned below). It has a function. Also in this modification, due to the function of preventing the movement of the wiring board 1 by the conical ribs 22 and the projecting portions 31, a fastening member such as a screw is not required for mounting the wiring board 1 and the base body 2 or the cover body 3.

このように、配線基板１に形成された凹部１２に、ベース体２の突出部２１に形成された円錐状リブ２２が軸線を一致させて突入し、凹部１２の下側内周縁に接触して係止することによって、厚み方向及び水平方向への配線基板１の移動を全方位的に阻止ないし抑制することができる。したがって、配線基板１をベース体２及びカバー体３に保持する際、これらが有する寸法のバラツキを凹部１２及び円錐状リブ２２で吸収して、配線基板１にガタツキや過大な応力が発生するのを防止ないし減少することができる。しかも、凹部１２を配線基板１に形成するとともに、その凹部１２に突入して下側内周縁に接触可能な円錐状リブ２２を、ベース体２の突出部２１の先端部に形成すればよいので、配線基板１の固定構造を安価に提供できる。   As described above, the conical rib 22 formed on the protruding portion 21 of the base body 2 enters the concave portion 12 formed on the wiring substrate 1 with the axis line aligned, and contacts the lower inner peripheral edge of the concave portion 12. By locking, the movement of the wiring board 1 in the thickness direction and the horizontal direction can be prevented or suppressed in all directions. Therefore, when the wiring board 1 is held by the base body 2 and the cover body 3, variations in the dimensions of the wiring board 1 are absorbed by the recesses 12 and the conical ribs 22, and rattling and excessive stress are generated in the wiring board 1. Can be prevented or reduced. In addition, since the recess 12 is formed in the wiring board 1, the conical rib 22 that enters the recess 12 and can come into contact with the lower inner peripheral edge may be formed at the tip of the protruding portion 21 of the base body 2. The fixing structure of the wiring board 1 can be provided at a low cost.

上記した通り、円錐状リブ２２が凹部１２に突入する場合であっても、貫通孔に突入する場合と同等な移動阻止機能を有し、同様の作用効果が得られる。すなわち、被挿入部が厚み方向に貫通形成された貫通孔であるか、厚み方向に窪み形成された凹部であるかは、基板固定構造において本質的な事項ではない。 As described above, even when the conical rib 22 enters the concave portion 12, it has a movement preventing function equivalent to that when it enters the through hole, and the same effect can be obtained. That is, it is not an essential matter in the substrate fixing structure whether the inserted portion is a through hole formed through in the thickness direction or a recess formed in the thickness direction.

（実施例）
図７は本発明に係る基板固定構造の一例を模式的に示す平面断面図及び正面断面図である。図７は、柱状に突出するベース体２側の突出部２１の先端部に円錐状リブ２２が形成されるとともに、柱状に突出するカバー体３側の突出部３１の先端部にも円錐状リブ３２が形成される、いわゆる両側円錐状リブタイプ（又は双頭円錐状リブタイプ）の基板固定構造を示している。 ( Example)
FIG. 7 is a plan sectional view and a front sectional view schematically showing an example of a substrate fixing structure according to the present invention. FIG. 7 shows that a conical rib 22 is formed at the tip of the protrusion 21 on the base body 2 side that protrudes in a columnar shape, and a conical rib on the tip of the protrusion 31 on the cover body 3 side that protrudes in a columnar shape. 32 shows a so-called double-sided conical rib type (or double-headed conical rib type) substrate fixing structure in which 32 is formed.

具体的には、ベース体２側の突出部２１の先端部は、円形状の断面を有するとともに、先端（図では上端）へ向かうにつれて連続的に縮径する（すなわち先細になる）縮径部としての円錐状リブ２２に形成されている。この円錐状リブ２２は、先端から配線基板１の貫通孔１１に対し軸線を一致させて突入するとともに、貫通孔１１への挿入状態（装着状態）において、貫通孔１１の挿入側内周縁（図では下側内周縁）に対し斜め交差状に接触するように、挿入方向において連続的に径変化する径変化部でもある。   Specifically, the distal end portion of the projecting portion 21 on the base body 2 side has a circular cross section, and the diameter-reduced portion is continuously reduced in diameter (that is, tapered) toward the tip (upper end in the drawing). As a conical rib 22. The conical rib 22 protrudes from the front end with the axis line coincident with the through hole 11 of the wiring board 1, and in the inserted state (attached state) into the through hole 11, the insertion side inner peripheral edge (see FIG. Then, it is also a diameter changing portion that continuously changes in diameter in the insertion direction so as to come into contact with the lower inner peripheral edge) in an obliquely intersecting manner.

一方、カバー体３側の突出部３１の先端部は、円形状の断面を有するとともに、先端（図では下端）へ向かうにつれて連続的に縮径する（すなわち先細になる）縮径部としての円錐状リブ３２に形成されている。この円錐状リブ３２は、先端から配線基板１の貫通孔１１に対し軸線を一致させて突入するとともに、貫通孔１１への挿入状態（装着状態）において、貫通孔１１の挿入側内周縁（図では上側内周縁）に対し斜め交差状に接触するように、挿入方向において連続的に径変化する径変化部でもある。   On the other hand, the tip of the protrusion 31 on the cover body 3 side has a circular cross section, and a cone as a reduced diameter portion that continuously decreases in diameter toward the tip (lower end in the figure) (that is, tapers). The ribs 32 are formed. The conical rib 32 protrudes from the tip with the axis line aligned with the through hole 11 of the wiring board 1, and in the inserted state (attached state) into the through hole 11, the insertion side inner peripheral edge (see FIG. Then, it is also a diameter changing portion that continuously changes in diameter in the insertion direction so as to come into contact with the upper inner peripheral edge) in an obliquely intersecting manner.

したがって、円錐状リブ２２，３２は、被挿入部である貫通孔１１の上下両側の内周縁に接触して係止することにより、挿入接触部として、厚み方向（図では上下方向）及び主表面１ａ，１ｂと平行な方向（図では水平方向）への配線基板１の移動を阻止ないし抑制する機能を有する。このように、円錐状リブ２２，３２による配線基板１の移動阻止機能によって、配線基板１とベース体２又はカバー体３との取り付けにビス等の締結部材が不要となる。   Therefore, the conical ribs 22 and 32 come into contact with and engage with the inner peripheral edges on the upper and lower sides of the through-hole 11 that is the inserted portion, so that the insertion contact portion has a thickness direction (vertical direction in the drawing) and a main surface. It has a function of preventing or suppressing the movement of the wiring board 1 in a direction parallel to 1a and 1b (horizontal direction in the figure). As described above, the function of preventing the movement of the wiring board 1 by the conical ribs 22 and 32 eliminates the need for a fastening member such as a screw to attach the wiring board 1 to the base body 2 or the cover body 3.

このように、配線基板１に形成された貫通孔１１に、ベース体２の突出部２１に形成された円錐状リブ２２と、カバー体３側の突出部３１に形成された円錐状リブ３２とが軸線を一致させてほぼ同時に突入し、貫通孔１１の上下両側の内周縁に接触して係止することによって、厚み方向及び水平方向への配線基板１の移動を全方位的に確実に阻止ないし抑制することができる。したがって、配線基板１をベース体２及びカバー体３に保持する際、これらが有する寸法のバラツキを貫通孔１１及び円錐状リブ２２，３２で吸収して、配線基板１にガタツキや過大な応力が発生するのを防止ないし減少することができる。しかも、貫通孔１１を配線基板１に形成するとともに、その貫通孔１１に突入して上下両側の内周縁に接触可能な円錐状リブ２２，３２を、ベース体２の突出部２１の先端部及びカバー体３の突出部３１の先端部に形成すればよいので、配線基板１の固定構造を安価に提供できる。   Thus, in the through hole 11 formed in the wiring board 1, the conical rib 22 formed in the protruding portion 21 of the base body 2, and the conical rib 32 formed in the protruding portion 31 on the cover body 3 side, Are aligned at the same time with the axes aligned, and contact and lock the inner peripheral edges of the upper and lower sides of the through-hole 11 to reliably prevent the movement of the wiring board 1 in the thickness direction and the horizontal direction in all directions. Or can be suppressed. Therefore, when the wiring board 1 is held by the base body 2 and the cover body 3, variations in the dimensions of the wiring board 1 are absorbed by the through holes 11 and the conical ribs 22 and 32, so that the wiring board 1 has a backlash and excessive stress. It is possible to prevent or reduce the occurrence. In addition, the through-hole 11 is formed in the wiring board 1, and the conical ribs 22 and 32 that enter the through-hole 11 and can come into contact with the inner peripheral edges on both the upper and lower sides are connected to the tip of the protruding portion 21 of the base body 2 and Since it should just be formed in the front-end | tip part of the protrusion part 31 of the cover body 3, the fixing structure of the wiring board 1 can be provided cheaply.

（変形実施例１）
図８は図７の第１変形実施例を模式的に示す平面断面図及び正面断面図である。この変形実施例では、ベース体２及びカバー体３は、図７と同様に平面視でやや横長矩形状であるが、配線基板１は平面視でやや縦長の矩形状である。したがって、ベース体２又はカバー体３（基板ケースＣ）のいずれかの側壁と配線基板１との離間距離は、他の側壁と配線基板１との離間距離よりも相当大きくなる。しかし、配線基板１の形状、あるいはベース体２及びカバー体３の形状が変化しても、図８に示す基板固定構造は実施例（図７）と同様である。すなわち、配線基板１、ベース体２、カバー体３の個々の形状は、本発明において本質的な限定事項ではない。 (Modified Example 1 )
FIG. 8 is a plan sectional view and a front sectional view schematically showing the first modified embodiment of FIG. In this modified embodiment , the base body 2 and the cover body 3 have a slightly horizontally long rectangular shape in plan view as in FIG. 7, but the wiring board 1 has a slightly vertically long rectangular shape in plan view. Therefore, the distance between the side wall of either the base body 2 or the cover body 3 (board case C) and the wiring board 1 is considerably larger than the distance between the other side wall and the wiring board 1. However, even if the shape of the wiring substrate 1 or the shapes of the base body 2 and the cover body 3 change, the substrate fixing structure shown in FIG. 8 is the same as that of the embodiment ( FIG. 7). That is, the individual shapes of the wiring board 1, the base body 2, and the cover body 3 are not essential limitations in the present invention.

（変形実施例２）
図９は図７の第２変形実施例を模式的に示す平面断面図及び正面断面図である。この変形実施例では、貫通孔１１と円錐状リブ２２，３２との組み合わせは、矩形状の配線基板１の一方の対角線に沿って２ヶ所配置されている。そして、矩形状の配線基板１の他方の対角線が通る２ヶ所の角隅部には、ベース体２の底壁２ａから立設された基板受け部２ｃが配置されている。この基板受け部２ｃは、配線基板１の下面１ａ（及び外周面）を下側から保持することにより、主として配線基板１の厚み方向への移動を阻止ないし抑制する機能を有する。 (Modified Example 2 )
Figure 9 is a plan sectional view and a front sectional view showing a second modified embodiment of FIG. 7 schematically. In this modified embodiment , two combinations of the through hole 11 and the conical ribs 22 and 32 are arranged along one diagonal line of the rectangular wiring board 1. And the board | substrate receiving part 2c erected from the bottom wall 2a of the base body 2 is arrange | positioned in the two corners where the other diagonal of the rectangular wiring board 1 passes. The substrate receiving portion 2c mainly has a function of preventing or suppressing the movement of the wiring board 1 in the thickness direction by holding the lower surface 1a (and the outer peripheral surface) of the wiring board 1 from the lower side.

しかし、貫通孔１１と円錐状リブ２２，３２との組み合わせ個数が変化しても、図９に示す基板固定構造は実施例（図７）と同様である。すなわち、貫通孔１１と円錐状リブ２２，３２との組み合わせ個数は、本発明において本質的な限定事項ではない。 However, even if the number of combinations of the through holes 11 and the conical ribs 22 and 32 changes, the substrate fixing structure shown in FIG. 9 is the same as that of the embodiment ( FIG. 7). That is, the number of combinations of the through hole 11 and the conical ribs 22 and 32 is not an essential limitation in the present invention.

（変形実施例３）
図１０は図７の第３変形実施例を模式的に示す正面断面図である。この変形実施例では、配線基板１の主表面１ａ，１ｂを厚み方向に貫通する断面円形状の貫通孔の代わりに、配線基板１の下面１ａ（第一主表面）及び上面１ｂ（第二主表面）をそれぞれ厚み方向に陥没させ、軸線を一致させてくぼみ形成された断面円形状の凹部１２，１２が設けられている。 (Modified Example 3 )
FIG. 10 is a front sectional view schematically showing the third modified embodiment of FIG. In this modified embodiment , instead of a through hole having a circular cross section penetrating the main surfaces 1a and 1b of the wiring board 1 in the thickness direction, the lower surface 1a (first main surface) and the upper surface 1b (second main surface) of the wiring board 1 are used. Recesses 12 and 12 having circular cross-sections are provided, each of which has a recess in the thickness direction and the axial lines coincide with each other.

したがって、円錐状リブ２２は、被挿入部である凹部１２，１２の上下両側の内周縁に接触して係止することにより、挿入接触部として、厚み方向（図では上下方向）及び主表面１ａ，１ｂと平行な方向（図では水平方向）への配線基板１の移動を阻止ないし抑制する機能を有する。この変形例においても、円錐状リブ２２，３２による配線基板１の移動阻止機能によって、配線基板１とベース体２又はカバー体３との取り付けにビス等の締結部材が不要となる。   Therefore, the conical rib 22 contacts and locks the inner peripheral edges on both the upper and lower sides of the recesses 12 and 12 that are the inserted portions, thereby serving as the insertion contact portion in the thickness direction (vertical direction in the drawing) and the main surface 1a. , 1b has a function of preventing or suppressing the movement of the wiring board 1 in a direction parallel to the horizontal direction (horizontal direction in the figure). Also in this modification, a fastening member such as a screw is not required for mounting the wiring board 1 and the base body 2 or the cover body 3 by the function of preventing the movement of the wiring board 1 by the conical ribs 22 and 32.

このように、配線基板１に形成された凹部１２，１２に、ベース体２の突出部２１に形成された円錐状リブ２２と、カバー体３の突出部３１に形成された円錐状リブ３２とが軸線を一致させてほぼ同時に突入し、凹部１２，１２の上下両側の内周縁に接触して係止することによって、厚み方向及び水平方向への配線基板１の移動を全方位的に確実に阻止ないし抑制することができる。したがって、配線基板１をベース体２及びカバー体３に保持する際、これらが有する寸法のバラツキを凹部１２，１２及び円錐状リブ２２，３２で吸収して、配線基板１にガタツキや過大な応力が発生するのを防止ないし減少することができる。しかも、凹部１２，１２を配線基板１に形成するとともに、その凹部１２，１２に突入して上下両側の内周縁に接触可能な円錐状リブ２２，３２を、ベース体２の突出部２１の先端部及びカバー体３の突出部３１の先端部に形成すればよいので、配線基板１の固定構造を安価に提供できる。   As described above, the conical ribs 22 formed on the protrusions 21 of the base body 2 and the conical ribs 32 formed on the protrusions 31 of the cover body 3 are formed in the recesses 12 and 12 formed on the wiring board 1. Are aligned at the same time with the axes aligned, and are brought into contact with and locked to the inner peripheral edges on both the upper and lower sides of the recesses 12 and 12 to reliably move the wiring board 1 in the thickness direction and the horizontal direction in all directions. Can be blocked or suppressed. Therefore, when the wiring board 1 is held by the base body 2 and the cover body 3, variations in the dimensions of the wiring board 1 are absorbed by the recesses 12, 12 and the conical ribs 22, 32, thereby causing the wiring board 1 to be unstable or excessively stressed. Can be prevented or reduced. In addition, the conical ribs 22 and 32 that are formed in the wiring board 1 and that come into contact with the inner peripheral edges on both the upper and lower sides are formed at the tip of the projecting portion 21 of the base body 2. Therefore, the fixing structure for the wiring board 1 can be provided at low cost.

上記した通り、円錐状リブ２２，３２が凹部１２，１２に突入する場合であっても、貫通孔に突入する場合と同等な移動阻止機能を有し、同様の作用効果が得られる。すなわち、被挿入部が厚み方向に貫通形成された貫通孔であるか、厚み方向に窪み形成された凹部であるかは、本発明において本質的な限定事項ではない。   As described above, even when the conical ribs 22 and 32 enter the recesses 12 and 12, the same function and effect as the case where the conical ribs 22 and 32 enter the through holes are obtained. That is, it is not an essential limitation in the present invention whether the inserted portion is a through hole formed through in the thickness direction or a recess formed in the thickness direction.

（参考例２）
図１１は基板固定構造の他の参考例を模式的に示す平面断面図及び正面断面図である。図１１は、ベース体２側の突出部２１の先端部に形成された、いわゆる開きリブ２３を示している。 ( Reference Example 2 )
FIG. 11 is a plan sectional view and a front sectional view schematically showing another reference example of the substrate fixing structure . FIG. 11 shows a so-called opening rib 23 formed at the tip of the protrusion 21 on the base body 2 side.

具体的には、図１１及び図１２に示すように、貫通孔１１への挿入状態（装着状態）において、柱状に突出するベース体２側の突出部２１の先端部は、先端（図では上端）へ向かうにつれて軸線から遠ざかり花びら状に広がるように、周方向に複数（図では４枚）の接触片２３ａに分割して形成されており、連続的に拡径する拡径部としての開きリブ２３を構成している。この開きリブ２３（接触片２３ａ）は、先端から配線基板１の貫通孔１１に対し軸線を一致させて突入するとともに、貫通孔１１への挿入状態（装着状態）において、貫通孔１１の突出側内周縁（図では上側内周縁）に対し斜め交差状に接触するように、挿入方向において連続的に径変化する径変化部でもある。   Specifically, as shown in FIGS. 11 and 12, in the inserted state (attached state) into the through-hole 11, the distal end portion of the protruding portion 21 on the base body 2 side protruding in a columnar shape is the distal end (the upper end in the figure). ) Is separated from the axial line toward the direction of the petals, and is divided into a plurality of (four in the figure) contact pieces 23a in the circumferential direction so as to spread, and an open rib as a diameter-expanding portion that continuously increases in diameter. 23. The opening rib 23 (contact piece 23 a) protrudes from the tip with the axis line aligned with the through hole 11 of the wiring board 1, and in the insertion state (attached state) to the through hole 11, the protruding side of the through hole 11. It is also a diameter changing portion that continuously changes in diameter in the insertion direction so as to contact the inner peripheral edge (upper inner peripheral edge in the drawing) in an obliquely intersecting manner.

なお、柱状に突出するカバー体３側の突出部３１の先端部は、円形状の断面を有するとともに、先端（図では下端）へ向かうにつれて連続的に縮径する（すなわち先細になる）円錐状リブ３２に形成されている。この円錐状リブ３２は、環状に配置された４枚の接触片２３ａの中央部に軸線を一致させて先端から突入する。円錐状リブ３２の突入によって、４枚の接触片２３ａは弾性変形により花びら状に広がって、貫通孔１１の上側内周縁に対し斜め交差状に接触して係止する。   The tip of the protrusion 31 on the cover body 3 side that protrudes in a columnar shape has a circular cross section, and has a conical shape that continuously decreases in diameter (that is, tapers) toward the tip (lower end in the figure). Ribs 32 are formed. The conical rib 32 protrudes from the tip with the axis line aligned with the center of the four contact pieces 23a arranged in an annular shape. Due to the penetration of the conical ribs 32, the four contact pieces 23a spread in a petal shape due to elastic deformation, and come into contact with the upper inner periphery of the through hole 11 in an obliquely intersecting manner and are locked.

したがって、開きリブ２３（接触片２３ａ）は、被挿入部である貫通孔１１の上側内周縁に接触して係止することにより、挿入接触部として、厚み方向（図では上下方向）及び主表面１ａ，１ｂと平行な方向（図では水平方向）への配線基板１の移動を阻止ないし抑制する機能を有する。このように、開きリブ２３（接触片２３ａ）による配線基板１の移動阻止機能によって、配線基板１とベース体２又はカバー体３との取り付けにビス等の締結部材が不要となる。   Therefore, the opening rib 23 (contact piece 23a) comes into contact with and engages with the upper inner periphery of the through-hole 11 that is the inserted portion, thereby forming the insertion contact portion in the thickness direction (vertical direction in the figure) and the main surface. It has a function of preventing or suppressing the movement of the wiring board 1 in a direction parallel to 1a and 1b (horizontal direction in the figure). As described above, the function of preventing the movement of the wiring board 1 by the opening rib 23 (contact piece 23a) eliminates the need for a fastening member such as a screw to attach the wiring board 1 to the base body 2 or the cover body 3.

このように、配線基板１に形成された貫通孔１１に、ベース体２の突出部２１に形成された開きリブ２３（接触片２３ａ）が軸線を一致させて突入し、貫通孔１１の上側の内周縁に接触して係止することによって、厚み方向及び水平方向への配線基板１の移動を全方位的に確実に阻止ないし抑制することができる。したがって、配線基板１をベース体２及びカバー体３に保持する際、これらが有する寸法のバラツキを貫通孔１１及び開きリブ２３（接触片２３ａ）で吸収して、配線基板１にガタツキや過大な応力が発生するのを防止ないし減少することができる。しかも、貫通孔１１を配線基板１に形成するとともに、その貫通孔１１に突入して上側の内周縁に接触可能な開きリブ２３を、ベース体２の突出部２１の先端部に形成すればよいので、配線基板１の固定構造を安価に提供できる。   Thus, the opening rib 23 (contact piece 23a) formed in the protruding portion 21 of the base body 2 enters the through hole 11 formed in the wiring board 1 with the axis line aligned, and the upper side of the through hole 11 is inserted. By contacting and locking the inner peripheral edge, the movement of the wiring board 1 in the thickness direction and the horizontal direction can be reliably prevented or suppressed in all directions. Therefore, when the wiring board 1 is held by the base body 2 and the cover body 3, variations in the dimensions of the wiring board 1 are absorbed by the through-holes 11 and the opening ribs 23 (contact pieces 23 a). It is possible to prevent or reduce the generation of stress. In addition, the through-hole 11 is formed in the wiring board 1, and the open rib 23 that enters the through-hole 11 and can contact the upper inner peripheral edge may be formed at the tip of the protruding portion 21 of the base body 2. Therefore, the fixing structure of the wiring board 1 can be provided at a low cost.

（変形例２）
図１３は図１１の変形例を模式的に示す平面断面図及び正面断面図である。この変形例では、ベース体２及びカバー体３は、図１１と同様に平面視でやや横長矩形状であるが、配線基板１は平面視でやや縦長の矩形状である。したがって、ベース体２又はカバー体３（基板ケースＣ）のいずれかの側壁と配線基板１との離間距離は、他の側壁と配線基板１との離間距離よりも相当大きくなる。しかし、配線基板１の形状、あるいはベース体２及びカバー体３の形状が変化しても、図１３に示す基板固定構造は参考例２（図１１）と同様である。すなわち、配線基板１、ベース体２、カバー体３の個々の形状は、基板固定構造において本質的な事項ではない。 (Modification 2 )
FIG. 13 is a plan sectional view and a front sectional view schematically showing a modification of FIG. In this modification, the base body 2 and the cover body 3 have a slightly horizontally long rectangular shape in plan view as in FIG. 11, but the wiring board 1 has a slightly vertically long rectangular shape in plan view. Therefore, the distance between the side wall of either the base body 2 or the cover body 3 (board case C) and the wiring board 1 is considerably larger than the distance between the other side wall and the wiring board 1. However, even if the shape of the wiring substrate 1 or the shapes of the base body 2 and the cover body 3 change, the substrate fixing structure shown in FIG. 13 is the same as that of the reference example 2 (FIG. 11). That is, the individual shapes of the wiring board 1, the base body 2, and the cover body 3 are not essential matters in the board fixing structure .

（参考例３）
図１４は基板固定構造のさらに他の参考例を模式的に示す正面図である。図１４は、ベース体２側の突出部２１の先端部に形成された、いわゆる閉じリブ２４を示している。 ( Reference Example 3 )
FIG. 14 is a front view schematically showing still another reference example of the substrate fixing structure. FIG. 14 shows a so-called closing rib 24 formed at the tip of the protruding portion 21 on the base body 2 side.

具体的には、閉じリブ２４は、柱状に突出するベース体２側の突出部２１の先端部が周方向に複数（図では４枚）に分割して形成された接触片２４ａを有している。配線基板１１を内部に収容した状態でベース体２及びカバー体３が合体するとき、４枚の接触片２４ａは、貫通孔１１の内周面又は内周縁に接触して弾性変形により先端へ向かうにつれて軸線に近づくように縮径する縮径部としての閉じリブ２４を構成している。この閉じリブ２４（接触片２４ａ）は、先端から貫通孔１１に対し軸線を一致させて突入し、かつ弾性復帰により貫通孔１１の内周面又は内周縁に係止することによって厚み方向及び水平方向への配線基板１の移動を阻止ないし抑制することができる。なお、各接触片２４ａは、先端（図では上端）ほど径が小さくなるように複数段（図では３段）の段差形状に形成されているが、段差のない形状であってもよい。   Specifically, the closing rib 24 has a contact piece 24a formed by dividing the tip end portion of the protruding portion 21 on the base body 2 side protruding in a columnar shape into a plurality (four in the drawing) in the circumferential direction. Yes. When the base body 2 and the cover body 3 are combined with the wiring board 11 accommodated therein, the four contact pieces 24a contact the inner peripheral surface or inner peripheral edge of the through hole 11 and head toward the tip by elastic deformation. Accordingly, a closing rib 24 is formed as a reduced diameter portion that is reduced in diameter so as to approach the axis. The closing rib 24 (contact piece 24a) protrudes from the tip with the axis line aligned with the through hole 11, and is engaged with the inner peripheral surface or the inner peripheral edge of the through hole 11 by elastic return, thereby moving in the thickness direction and horizontal. The movement of the wiring board 1 in the direction can be prevented or suppressed. Each contact piece 24a is formed in a step shape having a plurality of steps (three steps in the drawing) so that the diameter becomes smaller at the tip (upper end in the drawing), but may have a shape without a step.

また、柱状に突出するカバー体３側の突出部３１の先端部は、円形状の断面を有するとともに、先端（図では下端）へ向かうにつれて連続的に縮径する（すなわち先細になる）円錐状リブ３２に形成されている。この円錐状リブ３２は、環状に配置された４枚の接触片２４ａの中央部に軸線を一致させて先端から突入する。円錐状リブ３２の突入によって、４枚の接触片２４ａは縮径を停止し、又は弾性変形により拡径する。   Further, the tip of the protruding portion 31 on the cover body 3 side protruding in a columnar shape has a circular cross section, and has a conical shape that continuously decreases in diameter toward the tip (lower end in the drawing) (ie, tapers). Ribs 32 are formed. The conical rib 32 protrudes from the tip with the axis line aligned with the center of the four contact pieces 24a arranged in an annular shape. Due to the entry of the conical ribs 32, the four contact pieces 24a stop the diameter reduction, or are expanded by elastic deformation.

したがって、閉じリブ２４（接触片２４ａ）は、被挿入部である貫通孔１１の内周面又は内周縁に接触して係止することにより、挿入接触部として、厚み方向（図では上下方向）及び主表面１ａ，１ｂと平行な方向（図では水平方向）への配線基板１の移動を阻止ないし抑制する機能を有する。このように、閉じリブ２４（接触片２４ａ）による配線基板１の移動阻止機能によって、配線基板１とベース体２又はカバー体３との取り付けにビス等の締結部材が不要となる。   Therefore, the closing rib 24 (contact piece 24a) contacts and locks the inner peripheral surface or inner peripheral edge of the through-hole 11 that is the inserted portion, thereby forming the insertion contact portion in the thickness direction (vertical direction in the figure). And has a function of preventing or suppressing the movement of the wiring board 1 in a direction parallel to the main surfaces 1a and 1b (horizontal direction in the figure). As described above, the function of preventing the movement of the wiring board 1 by the closing rib 24 (contact piece 24a) eliminates the need for a fastening member such as a screw to attach the wiring board 1 to the base body 2 or the cover body 3.

このように、配線基板１に形成された貫通孔１１に、ベース体２の突出部２１に形成された閉じリブ２４（接触片２４ａ）が軸線を一致させて突入し、貫通孔１１の内周面又は内周縁に接触して係止することによって、厚み方向及び水平方向への配線基板１の移動を全方位的に確実に阻止ないし抑制することができる。したがって、配線基板１をベース体２及びカバー体３に保持する際、これらが有する寸法のバラツキを貫通孔１１及び閉じリブ２４（接触片２４ａ）で吸収して、配線基板１にガタツキや過大な応力が発生するのを防止ないし減少することができる。しかも、貫通孔１１を配線基板１に形成するとともに、その貫通孔１１に突入して内周面又は内周縁に接触可能な閉じリブ２４を、ベース体２の突出部２１の先端部に形成すればよいので、配線基板１の固定構造を安価に提供できる。   Thus, the closing rib 24 (contact piece 24a) formed on the protruding portion 21 of the base body 2 enters the through hole 11 formed in the wiring board 1 with the axis line aligned, and the inner periphery of the through hole 11 By contacting and locking the surface or inner peripheral edge, the movement of the wiring board 1 in the thickness direction and the horizontal direction can be reliably prevented or suppressed in all directions. Therefore, when the wiring board 1 is held by the base body 2 and the cover body 3, variations in the dimensions of the wiring board 1 are absorbed by the through holes 11 and the closing ribs 24 (contact pieces 24 a). It is possible to prevent or reduce the generation of stress. In addition, the through-hole 11 is formed in the wiring board 1, and the closing rib 24 that enters the through-hole 11 and can contact the inner peripheral surface or the inner peripheral edge is formed at the distal end portion of the protruding portion 21 of the base body 2. Therefore, the fixing structure of the wiring board 1 can be provided at low cost.

以上の説明は、配線基板として車両用ＥＣＵ基板についてのみ行ったが、その他の可搬式電子機器や固定式電子機器の配線基板等にも適用できる。なお、以上で説明した実施例（図７）及び変形実施例（図８〜図１０）において、参考例１（図１，図２）と共通する機能を有する部分には同一符号を付すことにより、説明の繰り返しを避けるようにした。また、参考例２（図１１，図１２）、変形例２（図１３）、参考例３（図１４）において、突出部３１＋円錐状リブ３２の構成は、段付きの突出部としてもよい。さらに、実施例は、技術的な矛盾を生じない範囲において各変形実施例、各参考例又は各変形例と組み合わせて実施することができる。 The above description has been given only for the vehicle ECU board as the wiring board, but it can also be applied to wiring boards of other portable electronic devices and fixed electronic devices. Incidentally, in the real施例(Figure 7) and modified embodiment described above (FIGS. 8 to 10), Reference Example 1 (FIGS. 1, 2) are denoted by the same reference numerals having the same functions as By doing so, we tried to avoid repeated explanations. Further, in Reference Example 2 (FIGS. 11 and 12), Modification 2 (FIG. 13), and Reference Example 3 (FIG. 14), the configuration of the protruding portion 31 + the conical rib 32 may be a stepped protruding portion. Furthermore, the embodiments can be implemented in combination with each modified embodiment, each reference example, or each modified example as long as no technical contradiction occurs.

１ 配線基板
１ａ 下面（第一主表面）
１ｂ 上面（第二主表面）
１１ 貫通孔（被挿入部）
１２ 凹部（被挿入部）
２ ベース体
２ａ 底壁
２ｂ 小径部
２ｃ 基板受け部
２１ 突出部
２２ 円錐状リブ（縮径部；径変化部；挿入接触部）
２３ 開きリブ（拡径部；径変化部；挿入接触部）
２３ａ 接触片
２４ 閉じリブ（挿入接触部）
２４ａ 接触片
３ カバー体
３ａ 天井壁
３ｂ 大径部
３１ 突出部
３２ 円錐状リブ（縮径部；径変化部；挿入接触部）
Ｃ 基板ケース
Ｄ 貫通孔の孔径 1 Wiring board 1a Bottom surface (first main surface)
1b Upper surface (second main surface)
11 Through hole (inserted part)
12 Recess (inserted part)
2 Base body 2a Bottom wall 2b Small diameter portion 2c Substrate receiving portion 21 Projecting portion 22 Conical rib (reduced diameter portion; diameter changing portion; insertion contact portion)
23 Opening rib (expanded diameter part; diameter changing part; insertion contact part)
23a Contact piece 24 Closing rib (insertion contact part)
24a Contact piece 3 Cover body 3a Ceiling wall 3b Large diameter part 31 Projection part 32 Conical rib (reduced diameter part; diameter change part; insertion contact part)
C Substrate case D Hole diameter

Claims (2)

配線基板の一方の主表面をベース体、他方の主表面をカバー体でそれぞれ覆い、それらベース体とカバー体とを合体した基板ケースの内部の所定位置に前記配線基板を保持する基板固定構造であって、
前記ベース体及びカバー体には、内部に収容された前記配線基板を挟み込んで所定位置に保持する１又は複数の突出部が、それぞれ対応する主表面に向けて突出形成され、
前記ベース体及びカバー体に形成される前記突出部の先端部は、前記配線基板の両側の主表面を厚み方向に貫通し又は陥没させた被挿入部に突入するとともに、前記被挿入部への挿入状態においてその被挿入部の内周縁に接触するように、挿入方向において連続的に径変化する径変化部に形成され、
前記配線基板を内部に収容した状態で前記ベース体及びカバー体が合体するとき、前記径変化部が前記被挿入部に突入し前記内周縁に接触して係止することによって、厚み方向及び主表面と平行な方向への前記配線基板の移動を阻止ないし抑制し、
前記径変化部は、前記被挿入部への挿入前の状態において、前記突出部の先端へ向かうにつれて連続的に縮径する縮径部であり、前記縮径部は、前記ベース体の突出部及び前記カバー体の突出部にそれぞれ形成され、前記配線基板の被挿入部に対し軸線を一致させて、対応する主表面側からそれぞれ挿入されることを特徴とする基板固定構造。 A substrate fixing structure in which one main surface of a wiring board is covered with a base body and the other main surface is covered with a cover body, and the wiring board is held at a predetermined position inside a substrate case in which the base body and the cover body are combined. There,
In the base body and the cover body, one or a plurality of projecting portions sandwiching the wiring board accommodated therein and holding the wiring substrate in a predetermined position are formed to project toward the corresponding main surfaces,
Previous end of the protruding portion formed on the base body and the cover body is configured to rush to the inserted part of the main surface was penetrated in a thickness direction or depressions on both sides of the wiring board, to the insertion member Is formed in a diameter changing portion that continuously changes in diameter in the insertion direction so as to contact the inner peripheral edge of the inserted portion in the inserted state of
When the base body and the cover body in a state of accommodating the wiring board inside coalesce, by the diameter change portion is locked in contact with the front Symbol the periphery projects into the insertion member, the thickness direction and Preventing or suppressing the movement of the wiring board in a direction parallel to the main surface ;
The diameter changing portion is a reduced diameter portion that continuously decreases in diameter toward the tip of the protruding portion in a state before being inserted into the insertion portion, and the reduced diameter portion is a protruding portion of the base body And a board fixing structure formed on the protruding portion of the cover body and inserted from the corresponding main surface side with the axis line aligned with the insertion portion of the wiring board . 前記被挿入部及び縮径部は複数組設けられ、前記配線基板の厚み方向から見たとき、矩形状の外形を有する前記配線基板の対角線に沿って、又はいずれかの辺に沿って配置されている請求項１に記載の基板固定構造。 A plurality of sets of inserted portions and reduced-diameter portions are provided, and are arranged along a diagonal line of the wiring board having a rectangular outer shape or along any side when viewed from the thickness direction of the wiring board. The substrate fixing structure according to claim 1 .
JP2011045100A 2011-03-02 2011-03-02 Board fixing structure Expired - Fee Related JP5585495B2 (en)

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US10225927B2 (en) * 2015-12-02 2019-03-05 Nsk Ltd. Structure of substrate having electronic parts mounted thereon and case for housing the substrate
JP2017157656A (en) * 2016-03-01 2017-09-07 サイレックス・テクノロジー株式会社 Housing structure of electronic apparatus
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