JP2008128284A - Substrate co-fastening structure, detecting metal fitting and fastened state detecting method - Google Patents

Substrate co-fastening structure, detecting metal fitting and fastened state detecting method Download PDF

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JP2008128284A
JP2008128284A JP2006311094A JP2006311094A JP2008128284A JP 2008128284 A JP2008128284 A JP 2008128284A JP 2006311094 A JP2006311094 A JP 2006311094A JP 2006311094 A JP2006311094 A JP 2006311094A JP 2008128284 A JP2008128284 A JP 2008128284A
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screw
substrate
fastened
board
head
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Ryosuke Muraki
亮介 村木
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Marelli Corp
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Calsonic Kansei Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a substrate co-fastening structure that can inexpensively detect a fastened state in co-fastening a substrate with another co-fastened component by a screw. <P>SOLUTION: The substrate co-fastening structure co-fastens a second housing 42 between a head 32 of the screw 3 and the substrate 1 in fixing the substrate 1 mounted with an electrical component, to a first housing 41. A substrate land 12 electrically connected to the electrical component is formed around a screw insertion hole 11 of the substrate 1, and a detecting metal fitting 5 brought into contact with the head 32 of the screw 3 and the substrate land 12 with predetermined set load or more in the normally fastened state of the screw 3 is provided between the head 32 of the screw 3 and the substrate land 12. A current is thereby carried between the head 32 of the screw 3 and the electrical component, and the fastened state of the screw 3 can be determined based on the current carrying state. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、基板を固定対象部材にねじで締結するのにあたり、基板を他部材と共締め状態で締結する基板の共締め構造、およびこの基板の共締め構造に用いる検出用金具、およびこの基板の共締め構造におけるネジの締結状態を検出する締結状態検出方法に関する。   The present invention relates to a substrate tightening structure for fastening a substrate together with other members when the substrate is fastened to a member to be fixed with a screw, a detection fitting used for the substrate tightening structure, and the substrate The present invention relates to a fastening state detection method for detecting a fastening state of a screw in the joint fastening structure.

基板をケースなどの他部品と共締めする構造は、構造が単純で安価に実施でき、従来から多用されている。
しかしながら、このような共締め構造では、基板と一緒に共締めする被共締め部品の成形ばらつきなどにより、ねじの十分な締結トルクが得られずに、固定対象部材と基板との間や、基板と被共締め部品との間などに浮きが生じるなどの締結不良が生じるおそれがある。
A structure in which a substrate is fastened together with other components such as a case has a simple structure and can be implemented at low cost, and has been widely used.
However, in such a joint fastening structure, due to variations in molding of the parts to be fastened together with the board, sufficient fastening torque of the screw cannot be obtained, and between the fixing target member and the board, There is a risk that a fastening failure such as a floating between the screw and the component to be fastened will occur.

そこで、従来は、このような締結不良の有無を、作業者の目視やドライバトルクなどに基づいて管理している。   Therefore, conventionally, the presence / absence of such a fastening failure is managed based on the operator's visual observation, driver torque, or the like.

また、締結後のねじの緩みを検出する技術として、ボルトにナットの緩み検出用のキャップを締結し、このキャップとナットとをセンサに接続し、ナットが緩んでキャップに接するとセンサがこれを検出するようにしたものが知られている(特許文献1参照)。
特開平7−279936号公報
Also, as a technology to detect looseness of the screw after fastening, a cap for detecting looseness of the nut is fastened to the bolt, and this cap and nut are connected to the sensor. What is detected is known (see Patent Document 1).
JP 7-279936 A

しかしながら、上述のように、目視やドライバトルクによる管理する方法では、締結不良の検出が十分に成されていなかった。   However, as described above, the fastening failure is not sufficiently detected by the visual or driver torque management method.

また、特許文献1に記載されたねじの緩みを検出する技術は、締結後のねじの緩みを検出する技術であって、締結時の締結不良の検出を行うことができず、しかも、ねじのそれぞれに特殊なキャップおよびセンサを用いるため、コストアップを招いてしまう。   Moreover, the technique for detecting the looseness of the screw described in Patent Document 1 is a technique for detecting the looseness of the screw after the fastening, and cannot detect a fastening failure at the time of fastening. Since special caps and sensors are used for each, the cost increases.

本発明は、上述のような従来の問題に着目して成されたもので、ねじにより基板を他の被共締め部品と共締めした際の締結状態の検出を安価に達成できる基板の共締め構造、検出用金具および締結状態検出方法を提供することを目的とする。   The present invention has been made by paying attention to the above-described conventional problems, and can be fastened together with a board that can achieve low-cost detection of a fastening state when the board is fastened together with other parts to be fastened with screws. An object is to provide a structure, a metal fitting for detection, and a fastening state detection method.

上述の目的を達成するため請求項1に記載の発明は、電気部品が実装された基板を固定対象部材にねじで固定させるのに伴い、ねじの頭部と基板との間に被共締め部品を共締めするようにした基板の共締め構造であって、前記ねじとして通電可能な素材製のものが用いられ、前記基板において、ねじを挿通させるねじ挿通穴の周囲に、前記電気部品と電気的に接続された基板ランドが形成され、前記ねじの頭部と基板ランドとの間に、前記ねじの正常な締結状態で、両者にあらかじめ設定された設定荷重以上で接触状態となる通電可能な素材製の検出用部材が設けられていることを特徴とする基板の共締め構造とした。
また、請求項2に記載の発明は、請求項1に記載の基板の共締め構造において、前記被共締め部品は、前記ねじの軸部を挿通可能な挿通穴が開口され、前記挿通穴の外周部において前記軸方向で前記基板ランドと重なる位置に、前記挿通穴の一部を外径方向に拡げた拡張部が形成され、前記検出用部材には、前記被共締め部品とねじの頭部との間に挟まれる第1の被挟持部と、前記拡張部を通り前記基板ランドとねじの頭部との間に挟まれる第2の被挟持部と、を備えていることを特徴とする基板の共締め構造とした。
また、請求項3に記載の発明は、請求項2に記載の検出用部材として用いる金属板製の検出用金具であって、前記ねじの軸部を挿通可能な挿通穴を中央に有し、前記ねじの頭部と被共締め部品との間に介在可能な寸法の環状に形成された前記第1の被挟持部としての環状部と、この環状部において、前記基板ランドと軸方向に重なる位置から軸方向に突出された前記第2の被挟持部としての脚部と、を備えていることを特徴とする検出用金具とした。
また、請求項4に記載の発明は、請求項3に記載の検出用金具において、前記脚部が、前記環状部の外周に連続して一体に形成され、かつ、環状部の軸心を通る直線に対称に複数設けられていることを特徴とする検出用金具とした。
また、請求項5に記載の発明は、請求項1または請求項2に記載の基板の共締め構造において、前記ねじの頭部と電気部品との間に通電し、その通電状態に基づいて、締結状態が正常であるか否かを判定することを特徴とする締結状態検出方法とした。
In order to achieve the above object, according to the first aspect of the present invention, there is provided a component to be fastened between the screw head and the substrate as the substrate on which the electrical component is mounted is fixed to the member to be fixed with the screw. The board is fastened together, and is made of a material that can be energized as the screw, and the electric component and the electric are formed around the screw insertion hole through which the screw is inserted in the board. The board lands connected to each other are formed, and the screw can be energized between the head of the screw and the board lands in a normal fastening state of the screw and in a contact state at a set load or more set in advance. A substrate co-clamping structure characterized in that a detection member made of a material is provided.
According to a second aspect of the present invention, in the joint fastening structure of the substrate according to the first aspect, the part to be fastened is provided with an insertion hole through which the shaft portion of the screw can be inserted. An extended portion in which a part of the insertion hole is extended in the outer diameter direction is formed at a position overlapping with the substrate land in the axial direction in the outer peripheral portion, and the component to be fastened and the head of the screw are formed on the detection member A first sandwiched portion sandwiched between the first and second portions, and a second sandwiched portion that passes through the extension portion and is sandwiched between the board land and a screw head. The substrate is fastened together.
The invention according to claim 3 is a metal plate detection fitting used as the detection member according to claim 2, and has an insertion hole through which the shaft portion of the screw can be inserted. An annular portion as the first sandwiched portion formed in an annular shape having a size that can be interposed between the head of the screw and the component to be fastened, and the annular portion overlaps the substrate land in the axial direction. And a leg portion as the second sandwiched portion protruding in the axial direction from the position.
According to a fourth aspect of the present invention, in the detection fitting according to the third aspect, the leg portion is formed integrally and continuously on the outer periphery of the annular portion, and passes through the axis of the annular portion. A metal fitting for detection characterized in that a plurality of lines are provided symmetrically with respect to a straight line.
Further, the invention according to claim 5 is the substrate co-tightening structure according to claim 1 or 2, wherein the current is passed between the head of the screw and the electrical component, and based on the current-carrying state, The fastening state detection method is characterized in that it is determined whether or not the fastening state is normal.

本発明の基板の共締め構造では、基板を固定対象部材にねじで締結する際に、ねじの頭部と基板との間に、被共締め部品を共締めし、さらに、ねじの頭部と基板ランドとの間に、検出用部材を介在させる。
そして、正常な締結状態では、検出用部材が、ねじの頭部と基板ランドとに設定荷重以上で接触状態となる。
In the board tightening structure of the present invention, when the board is fastened to the member to be fixed with screws, the parts to be fastened are fastened between the screw head and the board, and the screw head and A detection member is interposed between the substrate lands.
In a normal fastening state, the detection member comes into contact with the head of the screw and the board land at a set load or more.

ここで、ねじ、ならびに検出用部材は、通電可能な素材製であり、また、基板ランドと電機部品とは、接続回路で接続されている。したがって、上記共締め状態では、ねじ頭部が電気部品と電気的に接続された状態となる。   Here, the screw and the detection member are made of a material that can be energized, and the board land and the electrical component are connected by a connection circuit. Therefore, in the joint tightening state, the screw head is electrically connected to the electric component.

このような電気的な接続状態では、検出用部材と基板ランドとの接触が正常な場合は、接触不良状態に比べて、電気的な抵抗が小さくなる。すなわち、ねじの正常な締結状態では、ねじ頭部と検出用部材と基板ランドとであらかじめ設定された設定荷重以上の良好な接触状態となり、その電気抵抗が相対的に小さいのに対して、ねじの締結不良状態では、ねじ頭部と検出用部材と基板ランドとで設定荷重が得られない接触不良状態となり、その電気抵抗が相対的に高くなる。   In such an electrical connection state, when the contact between the detection member and the substrate land is normal, the electrical resistance is smaller than in the contact failure state. That is, in the normal fastening state of the screw, the screw head, the detection member, and the board land are in a good contact state that is equal to or higher than a preset load, and the electrical resistance is relatively small. In the fastening failure state, the screw head, the detection member, and the board land are in a contact failure state where a set load cannot be obtained, and the electrical resistance becomes relatively high.

このように、本発明の基板の共締め構造では、ねじの正常な締結状態と締結不良状態とで電気的な抵抗が異なるため、請求項5に記載の締結状態検出方法のように、ねじ頭部と電気部品との間で通電を行ったときの通電状態に基づいて、正常な締結状態であるか否かを判定することができる。   As described above, in the joint tightening structure of the substrate according to the present invention, the electrical resistance differs between the normal fastening state and the poor fastening state of the screw. Therefore, the screw head as in the fastening state detection method according to claim 5. Based on the energization state when energization is performed between the part and the electrical component, it can be determined whether or not it is in a normal fastening state.

よって、本発明の基板の共締め構造では、従来検出することができなかったねじによる締結状態を、電気的に検出することが可能となり、目視やドライバトルクなどにより管理するのに比べて、容易に検出することが可能であり、品質および生産性を向上させることができる。   Therefore, in the joint fastening structure of the substrate of the present invention, it is possible to electrically detect the fastening state with screws that could not be detected in the past, which is easier than managing by visual observation or driver torque. It is possible to improve the quality and productivity.

しかも、本発明では、このような電気的にねじの締結状態を検出することを、検出用部材を追加するとともに、基板に基板ランドを追加するだけで可能としたため、別途、特殊なキャップを用いたりセンサなどを追加したりするのに比べて、安価に製造することができる。
すなわち、検出用部材は、請求項3および請求項4に記載の発明のように、単なる金具で形成でき、また、基板ランドは、基板回路のプリント時に同時に形成することが可能であるから、安価に製造することができる。
In addition, in the present invention, it is possible to detect such a screw fastening state electrically by adding a detection member and adding a substrate land to the substrate. Compared with adding a sensor or the like, it can be manufactured at a low cost.
That is, the detection member can be formed by a simple metal fitting as in the inventions of claims 3 and 4, and the board land can be formed at the same time as the board circuit is printed. Can be manufactured.

また、請求項2〜4に記載の発明では、検出用部材の第2の被挟持部が、挿通穴の一部を外径方向に拡張した拡張部に配置されているため、ねじを締結する際に、検出用部材が拡張部と周方向に係合して連れ周りしない。よって、検出用部材と基板ランドとが擦れ合うのを防止して、両者の電気的接触状態をより確実なものとすることができる。   In the inventions according to claims 2 to 4, since the second sandwiched portion of the detection member is disposed in the extended portion in which a part of the insertion hole is expanded in the outer diameter direction, the screw is fastened. At this time, the detection member is not engaged with the expansion portion in the circumferential direction. Therefore, the detection member and the substrate land can be prevented from rubbing, and the electrical contact state between them can be made more reliable.

さらに、請求項2および請求項3に記載の発明では、検出用部材が、ねじ頭部と被共締め部品との間に挟まれる第1の被挟持部と、ねじ頭部と基板ランドとの間に挟まれる第2の被挟持部と、を備えているため、検出用部材が、第2の被挟持部分のみで構成される場合に比べて、被共締め部品ならびに基板に対する締結トルクと、基板ランドに対する接触圧とを、関連付けしやすくなり、ねじの締結状態の検出精度をより高めることができる。   Furthermore, in the invention according to claim 2 and claim 3, the detection member includes a first sandwiched portion sandwiched between the screw head and the component to be fastened, and the screw head and the substrate land. A second clamping part sandwiched therebetween, compared to the case where the detection member is configured only by the second clamping part, the fastening torque for the parts to be fastened and the board, It becomes easy to relate the contact pressure to the substrate land, and the detection accuracy of the screw fastening state can be further increased.

加えて、請求項4に記載の発明では、検出用金具において、脚部が環状部の外周に連続して一体に形成されているため、検出用金具を1枚の金属板で形成可能であり、安価に製造可能となる
さらに、被共締め部品に接する部分が環状に形成され、基板ランドに接する複数の脚部が軸心を通る直線に対称に配置されてういるため、ねじを締結した際に、検出用金具の姿勢が安定し、被挟持部品を環状部の全周で安定して挟持可能であり、共締め性能を安定させることができ、しかも、各脚部が均等な接触圧で基板ランドに接触し、ねじ頭部−検出用部材−基端ランド間の抵抗値を安定させることで、検出性能を安定させることができる。
In addition, in the invention according to claim 4, since the leg portion is formed integrally with the outer periphery of the annular portion in the detection fitting, the detection fitting can be formed by a single metal plate. In addition, the parts that contact the parts to be fastened are formed in an annular shape, and the plurality of legs that contact the board land are arranged symmetrically in a straight line passing through the axis, so the screws are fastened. In this case, the posture of the metal fitting for detection is stable, the clamped parts can be clamped stably around the entire circumference of the annular part, the fastening performance can be stabilized, and each leg part has a uniform contact pressure. Thus, the detection performance can be stabilized by contacting the substrate land and stabilizing the resistance value between the screw head, the detection member, and the base land.

以下、本発明の実施の形態を図面に基づいて説明する。
この実施の形態の基板の共締め構造は、電気部品(2)が実装された基板(1)を固定対象部材(41)に固定させるのに伴い、ねじ(3)の頭部(32)と基板(1)との間に被共締め部品(42)を共締めするようにした基板の共締め構造であって、前記ねじ(3)として通電可能な素材製のものが用いられ、前記基板(1)において、ねじ(3)を挿通させるねじ挿通穴(11)の周囲に、前記電気部品(2)と電気的に接続された基板ランド(12)が形成され、前記ねじ(3)の頭部(32)と基板ランド(12)との間に、前記ねじ(3)の正常な締結状態で、両者にあらかじめ設定された設定荷重以上で接触状態となる通電可能な素材製の検出用部材(5)が設けられていることを特徴とする基板の共締め構造である。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The board tightening structure of this embodiment has a structure in which the head (32) of the screw (3) and the board (1) on which the electric component (2) is mounted are fixed to the fixing target member (41). A substrate tightening structure in which a component to be fastened (42) is fastened together with the substrate (1), wherein the screw (3) is made of a material that can be energized, and the substrate In (1), a board land (12) electrically connected to the electrical component (2) is formed around a screw insertion hole (11) through which the screw (3) is inserted, and the screw (3) For detection of a material that can be energized between the head (32) and the board land (12) in a normal fastening state of the screw (3) and in a contact state at a set load or more set in advance on both of them. It is the joint fastening structure of the board | substrate characterized by the member (5) being provided.

以下に、図1〜図4に基づいて、この発明の最良の実施の形態の実施例1の基板締結構造について説明する。   Below, based on FIGS. 1-4, the board | substrate fastening structure of Example 1 of the best embodiment of this invention is demonstrated.

この実施例1の基板締結構造は、図3に示す基板1の固定に用いられる。
この基板1は、上方から視て図示のような長方形形状に形成されており、表面1aに電子部品2が実装されているとともに、中央部と4隅部との5箇所に、ねじ挿通穴11が貫通して形成されている。
なお、ねじ挿通穴11は、その内径が、図1に示す締結用のねじ3において外周にねじ山が形成された軸部31を挿通可能に、この軸部31よりも大径に形成されている。
The board fastening structure of the first embodiment is used for fixing the board 1 shown in FIG.
The substrate 1 is formed in a rectangular shape as shown in the figure when viewed from above, and the electronic component 2 is mounted on the surface 1a, and the screw insertion holes 11 are provided at five locations of the central portion and the four corner portions. Is formed through.
The screw insertion hole 11 has an inner diameter larger than that of the shaft portion 31 so that the shaft portion 31 having a thread formed on the outer periphery of the fastening screw 3 shown in FIG. Yes.

そして、これらのねじ挿通穴11の周囲には、図2に示すように、このねじ挿通穴11を囲む円環状の基板ランド12が設けられており、この基板ランド12は、図3に示すように、接続回路13を介して電子部品2に接続されている。なお、基板ランド12および接続回路13は、基板1の表面1aに回路をプリントする際に同時にプリントすることで形成される。   As shown in FIG. 2, an annular substrate land 12 surrounding the screw insertion hole 11 is provided around the screw insertion holes 11, and the substrate land 12 is formed as shown in FIG. Further, it is connected to the electronic component 2 via the connection circuit 13. Note that the board land 12 and the connection circuit 13 are formed by printing at the same time when the circuit is printed on the surface 1 a of the board 1.

基板1は、ハウジングケース4に収容される。
このハウジングケース4は、図4に示す固定対象部材としての箱状の第1ハウジング41と被共締め部品としての箱状の第2ハウジング42とを備え、両ハウジング41,42とを重ね合わせたときに、両者41,42の間に基板1を収容する収納空間4aを形成する(図1参照)。
第1ハウジング41には、立壁41aの4隅部分から、図1に示すように、ねじ3を締結するねじ受部41bが突出されており、このねじ受部41bの先端に基板1の裏面1bを支持する支持面41cを備えている。また、第1ハウジング41の中央部にも、詳細な図示は省略するがねじ受部41bが形成されている。
The substrate 1 is accommodated in the housing case 4.
The housing case 4 includes a box-shaped first housing 41 as a member to be fixed shown in FIG. 4 and a box-shaped second housing 42 as a component to be fastened, and the housings 41 and 42 are overlapped. Sometimes, a storage space 4a for storing the substrate 1 is formed between both 41 and 42 (see FIG. 1).
As shown in FIG. 1, a screw receiving portion 41b for fastening the screw 3 protrudes from the four corner portions of the standing wall 41a to the first housing 41, and the back surface 1b of the substrate 1 is formed at the tip of the screw receiving portion 41b. The support surface 41c which supports is provided. Further, a screw receiving portion 41b is also formed in the central portion of the first housing 41, although detailed illustration is omitted.

第2ハウジング42の4隅には、ねじ受部41bと同軸にフランジ状の被共締め片42aが形成されており、この被共締め片42aに、ねじ3の軸部31を挿通させる挿通穴43が形成されている。また、第2ハウジング42の中央部には、基板1の中央部を固定するのに用いる筒部42bが立設され、この筒部42bの先端部にも、被共締め片42aが形成されているとともに、挿通穴43が形成されている。   At the four corners of the second housing 42, flanged fastened pieces 42a are formed coaxially with the screw receiving portions 41b. Insertion holes for inserting the shaft portions 31 of the screws 3 into the fastened pieces 42a. 43 is formed. In addition, a cylindrical portion 42b used for fixing the central portion of the substrate 1 is erected at the central portion of the second housing 42, and a fastened piece 42a is formed at the distal end portion of the cylindrical portion 42b. In addition, an insertion hole 43 is formed.

挿通穴43は、ねじ3の軸部31を挿通可能であるとともに、ねじ3の頭部32よりも小径で円形に形成された軸挿通部43aと、この軸挿通部43aからねじ3の頭部32の直径よりも僅かに大きな位置まで、図2に示すように外径方向に略十字に拡がって形成された4つの拡張部43bと、を備えている。
なお、図1に示すように、基板ランド12は、成形誤差および組付誤差を考慮して拡張部43bの外周部分よりも大径に形成されている。
The insertion hole 43 is capable of inserting the shaft portion 31 of the screw 3, and has a shaft insertion portion 43 a that is smaller in diameter and circular than the head portion 32 of the screw 3, and the head portion of the screw 3 from the shaft insertion portion 43 a. As shown in FIG. 2, four extended portions 43 b formed so as to expand in a substantially cross shape to a position slightly larger than the diameter of 32 are provided.
As shown in FIG. 1, the substrate land 12 is formed with a larger diameter than the outer peripheral portion of the extended portion 43b in consideration of molding errors and assembly errors.

挿通穴43には、ねじ3の頭部32と第2ハウジング42および基板1との間に介在される通電可能な金属板製の検出用金具5が装着されている。
この検出用金具5は、図2に示すように、円環部(第1被挟持部)51と脚部(第2被挟持部)52とを備えている。
円環部51は、ねじ3の頭部32よりも僅かに大径の円環状に形成されており、軸心部分には、ねじ3の軸部31を挿通可能な外径を有した挿通穴51aが形成されている。
脚部52は、円環部51の外周縁の4箇所において円環部51に連続して軸方向(矢印CE方向)に沿って突出して形成されており、軸心を通る直線を中心として線対称に配置されるよう、相互に軸周り方向に90度の角度を成して配置されている。
The insertion hole 43 is provided with a metal fitting for detection 5 made of a metal plate that is interposed between the head 32 of the screw 3 and the second housing 42 and the substrate 1.
As shown in FIG. 2, the detection metal fitting 5 includes an annular portion (first sandwiched portion) 51 and a leg portion (second sandwiched portion) 52.
The annular portion 51 is formed in an annular shape having a slightly larger diameter than the head portion 32 of the screw 3, and an insertion hole having an outer diameter through which the shaft portion 31 of the screw 3 can be inserted in the axial center portion. 51a is formed.
The leg portions 52 are formed so as to protrude along the axial direction (arrow CE direction) continuously to the annular portion 51 at four locations on the outer peripheral edge of the annular portion 51, and the line is centered on a straight line passing through the axis. In order to arrange them symmetrically, they are arranged at an angle of 90 degrees in the direction around the axis.

さらに、各脚部52は、その外周方向寸法が、検出用金具5を挿通穴43と同軸に配置した際に、挿通穴43の各拡張部43bに挿通可能な寸法に形成されている。
また、各脚部52の高さ(突出方向寸法)は、第2ハウジング42の被共締め片42aの厚さと同じかごく僅かに大きな寸法に形成されている。
すなわち、各脚部52の高さは、脚部52を拡張部43bに挿通した状態で、図1に示すように、ねじ3により、基板1と第2ハウジング42とを共締状態でねじ受部41bに締結して、円環部51があらかじめ設定された荷重で基板1と第2ハウジング42とを挟持した正規締結状態としたときに、脚部52が基板ランド12に、あらかじめ設定された設定荷重以上で接触できる寸法に形成されている。
Further, each leg portion 52 is formed such that the dimension in the outer peripheral direction is such that it can be inserted into each extended portion 43 b of the insertion hole 43 when the metal fitting 5 for detection is arranged coaxially with the insertion hole 43.
Further, the height (projection direction dimension) of each leg portion 52 is formed to have a size that is very slightly the same as the thickness of the fastened piece 42 a of the second housing 42.
That is, the height of each leg portion 52 is such that the base plate 1 and the second housing 42 are screwed together with the screw 3 as shown in FIG. 1 in a state where the leg portion 52 is inserted into the extended portion 43b. When the ring portion 51 is fastened to the portion 41b and is in a normal fastening state in which the substrate 1 and the second housing 42 are sandwiched with a preset load, the leg portion 52 is set in advance on the substrate land 12. The dimensions are such that they can be contacted at a set load or higher.

次に、実施例の作用について説明する。
まず、基板1をハウジングケース4に収容して固定する場合の手順を説明する。
この場合、まず、第1ハウジング41の開口を上向きにして、その上に基板1を設置する。次に、基板1の上から第2ハウジング42を被せ、基板1の5箇所に形成されたねじ挿通穴11のそれぞれに対して、図1に示すように、ねじ受部41bと基板1のねじ挿通穴11と第2ハウジング42の被共締め片42aの挿通穴43とを略同軸に配置する。
Next, the operation of the embodiment will be described.
First, the procedure for housing and fixing the substrate 1 in the housing case 4 will be described.
In this case, first, the substrate 1 is placed on the first housing 41 with the opening facing upward. Next, the second housing 42 is covered from above the substrate 1, and the screw receiving portions 41 b and the screws of the substrate 1 are respectively inserted into the screw insertion holes 11 formed at five locations of the substrate 1 as shown in FIG. 1. The insertion hole 11 and the insertion hole 43 of the fastened piece 42a of the second housing 42 are arranged substantially coaxially.

次に、検出用金具5の4本の脚部52を、挿通穴43の4つの拡張部43bに差し込ませて、検出用金具5を、第2ハウジング42の被共締め片42aの挿通穴43に装着させる。
そして、図1に示すように、5本のねじ3を、それぞれ、そのねじ3の軸部31を5箇所の各挿通穴51a,43,11に挿通させて、ねじ受部41bに締結させる。
Next, the four legs 52 of the detection fitting 5 are inserted into the four extended portions 43 b of the insertion holes 43, and the detection fitting 5 is inserted into the insertion holes 43 of the fastened pieces 42 a of the second housing 42. To put on.
Then, as shown in FIG. 1, the five screws 3 are respectively fastened to the screw receiving portions 41 b by inserting the shaft portions 31 of the screws 3 into the five insertion holes 51 a, 43, 11.

このとき、ねじ3が正常に締結されて、図1に示すように、頭部32とねじ受部41bとの間に、基板1と第2ハウジング42の被共締め片42aとがあらかじめ設定された荷重以上で挟持された場合には、脚部52は、あらかじめ設定された荷重以上で基板ランド12に接触する。   At this time, the screw 3 is normally fastened, and as shown in FIG. 1, the substrate 1 and the fastened piece 42a of the second housing 42 are set in advance between the head 32 and the screw receiving portion 41b. In the case of being clamped with a load greater than or equal to the load, the leg portion 52 contacts the substrate land 12 with a load greater than or equal to a preset load.

よって、ねじ頭部32と電子部品2とは、検出用金具5、基板ランド12、接続回路13を介して電気的に接続された状態となる。   Therefore, the screw head 32 and the electronic component 2 are electrically connected via the detection metal fitting 5, the board land 12, and the connection circuit 13.

次に、ねじ3の締結状態の検出方法について説明する。
この締結状態の検出は、基板1をハウジングケース4に収容させるライン上で、自動的に行う。すなわち、ねじ3の締結を終了したら、次の工程において、図1に示す検出用器具Bを、ねじ3の頭部32に当接させ、検出用器具Bと電子部品2とが電気的に接続された状態とし、この検出用器具Bと電子部品2との間で設定電圧を与え、この間を流れる電流値を測定する。なお、このときに、検出用器具B側を、高電位、接地のいずれ側としてもよい。
Next, a method for detecting the fastening state of the screw 3 will be described.
The detection of this fastening state is automatically performed on a line for accommodating the substrate 1 in the housing case 4. That is, when the fastening of the screw 3 is finished, in the next step, the detection instrument B shown in FIG. 1 is brought into contact with the head 32 of the screw 3 so that the detection instrument B and the electronic component 2 are electrically connected. In this state, a set voltage is applied between the detection instrument B and the electronic component 2, and the value of the current flowing between them is measured. At this time, the detection instrument B side may be either the high potential side or the ground side.

そして、測定した電流値に基づいて、検出用金具5の脚部52と基板ランド12との接触状態、つまり、ねじ3の締結状態の判定を行う。
すなわち、ねじ3の正常な締結状態では、検出用金具5の脚部52が基板ランド12にあらかじめ設定された接触圧力で接触しているため、その電気抵抗も接触不良時に比べて低い抵抗となっており、あらかじめ設定された範囲内の電流値を検出することができる。
Then, based on the measured current value, the contact state between the leg portion 52 of the metal fitting 5 for detection and the board land 12, that is, the fastening state of the screw 3 is determined.
That is, in the normal fastening state of the screw 3, since the leg portion 52 of the detection metal fitting 5 is in contact with the board land 12 with a preset contact pressure, its electric resistance is also lower than that at the time of poor contact. The current value within a preset range can be detected.

一方、ねじ受部41bと基板1との間、あるいは基板1と第2ハウジング42との間に浮きが生じるような締結不良状態では、脚部52と基板ランド12との接触圧力があらかじめ設定された値とならず、接触不良状態となる。この場合、脚部52と基板ランド12との間の抵抗値が高くなり、あらかじめ設定された範囲内値よりも低い電流値となる。
このように、本実施例1では、ねじ3の頭部32と電子部品2との間で通電させて、その電流値を測定することで、ねじ3の締結状態が正常であるか否かを検出することができる。
On the other hand, the contact pressure between the leg portion 52 and the substrate land 12 is set in advance in a fastening failure state in which a float is generated between the screw receiving portion 41b and the substrate 1 or between the substrate 1 and the second housing 42. It becomes a poor contact state. In this case, the resistance value between the leg portion 52 and the board land 12 is high, and the current value is lower than a preset range value.
Thus, in the present Example 1, it is energized between the head 32 of the screw 3 and the electronic component 2, and the current value is measured to determine whether or not the fastening state of the screw 3 is normal. Can be detected.

以上のねじ3の頭部32に検出用器具Bを当接させて通電し、その電流値を検出して締結状態を判定することを、基板1を固定する5個のねじ3に対し、1個ずつ実行する。
また、この締結状態の判定を、製造ライン上で実行し、締結不良の場合には、次の工程に進まないようにすることで、締結不良品をより確実に検出することができる。
The detection tool B is brought into contact with the head 32 of the screw 3 and energized, and the current value is detected to determine the fastening state. Run one by one.
Further, the determination of the fastening state is executed on the production line, and in the case of a fastening failure, it is possible to more reliably detect a fastening failure product by not proceeding to the next step.

以上説明したように、実施例1では、基板1に基板ランド12および接続回路13を印刷し、この基板ランド12とねじ3の頭部32とに接触可能な検出用金具5を設定して、ねじ3と電子部品2とを電気的に接続可能として、ねじ3と電子部品2間の通電状態に基づいて、従来検出できなかった、ねじ3の締結状態を検出可能とした。
このため、ねじ3の締結状態を目視やドライバトルクにより判定するのに比べて、正確に短時間に判定可能となる。
さらに、単なる共締め構造と比較して、締結状態の検出のために新たに追加した部品は、円環状の検出用金具5だけであり、また、基板ランド12および接続回路13は、基板1の回路のプリント時に同時にプリントできるため、特殊なキャップやセンサを用いるのと比較して、上述の締結状態の検出を安価に達成することができる。
しかも、検出用金具5は、金属板による一体成形品としたため、脚部52として円環部51と別体のものを用いるのと比較して、安価に製造することができる。
As described above, in the first embodiment, the board land 12 and the connection circuit 13 are printed on the board 1, and the detection metal fitting 5 that can contact the board land 12 and the head 32 of the screw 3 is set. The screw 3 and the electronic component 2 can be electrically connected, and based on the energized state between the screw 3 and the electronic component 2, the fastening state of the screw 3 that could not be detected in the past can be detected.
For this reason, it is possible to accurately determine the fastening state of the screw 3 in a short time as compared with the case where it is determined visually or by driver torque.
Furthermore, compared to a simple joint fastening structure, the only part newly added for detecting the fastening state is an annular detection fitting 5, and the board land 12 and the connection circuit 13 are provided on the board 1. Since the circuit can be printed at the same time as the circuit is printed, the above-described detection of the fastening state can be achieved at a lower cost compared to using a special cap or sensor.
In addition, since the detection metal fitting 5 is an integrally molded product made of a metal plate, it can be manufactured at a lower cost compared to the case where the leg portion 52 is separated from the annular portion 51.

また、検出用金具5は、ねじ3の頭部32に接触する円環部51と、円環部51の外周に一体に形成された脚部52と、を有した構造とし、ねじ3の締結時には、円環部51が第2ハウジング42に圧接され、脚部52が基板ランド12に圧接されるようにした。
このため、ねじ3を締結した際に、円環部51が第2ハウジング42の被共締め片42aに対して、全周で安定して挟持可能であるとともに、各脚部52が均等な接触圧で基板ランド12に接触し、安定した共締め性能が得られるとともに、上記通電による締結状態の検出精度を高めることができる。
しかも、検出用金具5の脚部52による基板ランド12の接触圧力が、第2ハウジング42および基板1に対する締結トルクに応じた値となり、検出用金具が第2ハウジング42に接触することなく基板ランド12にのみ接触するものと比較して、上述の通電状態により締結状態の判定精度が高くなる。
加えて、脚部52が基板ランド12に接触した状態でねじ3を締結した場合、円環部51が弾性変形し、ねじ3の頭部32と第2ハウジング42との間に、この復元力による初期荷重を与えることができる。したがって、仮に締結後にねじ3の締結が緩んだとしても、この初期荷重により第2ハウジング42の挟持状態を維持させることができ、挟持性能を向上させることができる。
The detection metal fitting 5 has a structure including an annular portion 51 that contacts the head portion 32 of the screw 3 and a leg portion 52 that is integrally formed on the outer periphery of the annular portion 51. In some cases, the annular portion 51 was pressed against the second housing 42 and the leg portion 52 was pressed against the substrate land 12.
For this reason, when the screw 3 is fastened, the annular portion 51 can be stably held with respect to the fastened piece 42a of the second housing 42 around the entire circumference, and each leg portion 52 can be evenly contacted. The pressure can contact the substrate land 12 to obtain a stable co-fastening performance, and increase the detection accuracy of the fastening state by the energization.
In addition, the contact pressure of the substrate land 12 by the leg 52 of the detection metal fitting 5 becomes a value corresponding to the fastening torque to the second housing 42 and the substrate 1, and the detection metal fitting does not contact the second housing 42. Compared with what contacts 12 only, the determination accuracy of a fastening state becomes high by the above-mentioned energization state.
In addition, when the screw 3 is fastened in a state where the leg portion 52 is in contact with the board land 12, the annular portion 51 is elastically deformed, and this restoring force is between the head 32 of the screw 3 and the second housing 42. The initial load can be applied. Therefore, even if the fastening of the screw 3 is loosened after fastening, the clamping state of the second housing 42 can be maintained by this initial load, and the clamping performance can be improved.

さらに、第2ハウジング42の被共締め片42aの挿通穴43に外径方向に拡がる拡張部43bを形成し、この拡張部43bに脚部52を挿入させるようにした。このため、ねじ3を締結した際に、検出用金具5が連れ回るのが阻止され、脚部52と基板ランド12とを安定して接触させることができる。   Further, an extended portion 43b that extends in the outer diameter direction is formed in the insertion hole 43 of the fastened piece 42a of the second housing 42, and the leg portion 52 is inserted into the extended portion 43b. For this reason, when the screw 3 is fastened, the detection metal fitting 5 is prevented from being rotated, and the leg portion 52 and the board land 12 can be stably brought into contact with each other.

以上、図面を参照して、本発明の実施の形態および実施例1を詳述してきたが、具体的な構成は、この実施の形態および実施例1に限らず、本発明の要旨を逸脱しない程度の設計的変更は、本発明に含まれる。   As mentioned above, although embodiment and Example 1 of this invention were explained in full detail with reference to drawings, specific structure is not restricted to this Embodiment and Example 1, and does not deviate from the summary of this invention. A degree of design change is included in the present invention.

例えば、実施例1では、固定対称部品および被挟持部品として、基板1を収容するハウジングケース4を形成する第1ハウジング41および第2ハウジング42を示したが、基板1を他部品と共締めして、固定対象部材に固定するものであれば、ハウジングケース4に限定されるものではない。   For example, in the first embodiment, the first housing 41 and the second housing 42 that form the housing case 4 that accommodates the substrate 1 are shown as the fixed symmetrical component and the sandwiched component, but the substrate 1 is fastened together with other components. The housing case 4 is not limited as long as it is fixed to the fixing target member.

また、検出用部材として、第1の被挟持部としての円環部51と第2の被挟持部としての脚部52とを有した検出用金具5を示したが、検出用部材の形状は、これに限定されるものではない。例えば、第1の挟持部としての環状部分は、円形の環状に限らず、多角形形状など他の形状としてもよい。また、脚部52の数も、1以上であれば、4に限られない。   Moreover, although the detection metal fitting 5 which has the ring part 51 as a 1st to-be-clamped part and the leg part 52 as a 2nd to-be-clamped part was shown as a member for a detection, the shape of the member for a detection is shown. However, the present invention is not limited to this. For example, the annular portion as the first sandwiching portion is not limited to a circular annular shape, and may have other shapes such as a polygonal shape. Further, the number of leg portions 52 is not limited to 4 as long as it is 1 or more.

また、実施例1では、脚部52が円環部51の外周に一体に連続して形成されたものを示したが、これに限定されない。例えば、円環部とは別体の脚部を用いるようにしてもよい。   Moreover, in Example 1, although the leg part 52 showed what was integrally formed in the outer periphery of the annular ring part 51, it is not limited to this. For example, you may make it use a leg part separate from an annular part.

さらに、検出用部材は、実施例1では、第1の被挟持部としての円環部51と第2の被挟持部としての脚部52とを有した検出用金具5を示したが、第1の被挟持部を有しないものを用いてもよい。すなわち、検出用部材が、ねじ3の頭部32と基板ランド12との間のみに介在されるようにし、ねじ3の頭部32が被共締め部品としての第2ハウジング42と基板1とに所定の締結トルクを与えたときに、検出用部材が設定荷重以上で基板ランド12に接触状態となるような寸法に形成することで、締結状態を検出可能となる。   Further, in the first embodiment, the detection member 5 is the detection fitting 5 having the annular portion 51 as the first sandwiched portion and the leg portion 52 as the second sandwiched portion. You may use what does not have 1 to-be-clamped part. That is, the detection member is interposed only between the head 32 of the screw 3 and the board land 12, and the head 32 of the screw 3 is attached to the second housing 42 and the board 1 as the parts to be fastened. When a predetermined fastening torque is applied, the fastening state can be detected by forming the detection member so as to be in contact with the substrate land 12 at a set load or more.

また、実施例1では、固定対象部材として第1ハウジング41を示し、被共締め部品として第2ハウジング42を示したが、固定対象部材と被共締め部品との少なくとも一方を複数の部材で形成することもできる。すなわち、基板を複数のねじ3で固定対象部材に固定する場合、固定対象部材として、2以上の部材で形成するようにしてもよい。また、基板に被共締め部品を共締めする場合に、基板に対して被共締め部品を並列に配置して、場所により異なる部品を共締めするようにしてもよいし、あるいは、基板に対して被共締め部品を直列に配置して、複数の部品を重ねて共締めするようにしてもよい。あるいは、複数のねじのうちで、共締めするものと、単に固定対象部材に基板のみを固定するものと、が存在するようにしてもよい。   In the first embodiment, the first housing 41 is shown as the member to be fixed, and the second housing 42 is shown as the component to be fastened. However, at least one of the member to be fastened and the component to be fastened is formed by a plurality of members. You can also That is, when fixing a board | substrate to a fixing target member with the some screw 3, you may make it form with two or more members as a fixing target member. In addition, when the components to be fastened are fastened to the board, the parts to be fastened may be arranged in parallel to the board, and different parts may be fastened together depending on the location. The parts to be fastened may be arranged in series, and a plurality of parts may be stacked and fastened together. Alternatively, among the plurality of screws, there may be a screw to be fastened and a screw to simply fix the substrate to the member to be fixed.

本発明の最良の実施の形態の実施例1の基板の共締め構造を示す断面図である。It is sectional drawing which shows the joint fastening structure of the board | substrate of Example 1 of the best mode of the present invention. 本発明の実施の形態の実施例1の基板の共締め構造の要部を示す分解斜視図である。It is a disassembled perspective view which shows the principal part of the joint fastening structure of the board | substrate of Example 1 of embodiment of this invention. 本発明の実施の形態の実施例1の基板の共締め構造に用いる基板1を示す平面図である。It is a top view which shows the board | substrate 1 used for the joint fastening structure of the board | substrate of Example 1 of embodiment of this invention. 本発明の実施の形態の実施例1の基板の共締め構造の全体を示す分解斜視図である。It is a disassembled perspective view which shows the whole board | substrate joint fastening structure of Example 1 of embodiment of this invention.

符号の説明Explanation of symbols

1 基板
2 電子部品(電気部品)
3 ねじ
5 検出用金具(検出用部材)
11 ねじ挿通穴
12 基板ランド
31 軸部
32 頭部
41 第1ハウジング(固定対象部材)
42 第2ハウジング(被共締め部品)
42a 被共締め片
43 挿通穴
43a 軸挿通部
43b 拡張部
51 円環部
51a 挿通穴
52 脚部
1 Substrate 2 Electronic component (electrical component)
3 Screw 5 Detection bracket (detection member)
11 Screw insertion hole 12 Substrate land 31 Shaft portion 32 Head portion 41 First housing (fixed member)
42 Second housing (parts to be fastened together)
42a Fastened piece 43 Insertion hole 43a Shaft insertion part 43b Expansion part 51 Ring part 51a Insertion hole 52 Leg part

Claims (5)

電気部品が実装された基板を固定対象部材にねじで固定させるのに伴い、前記ねじの頭部と基板との間に被共締め部品を共締めするようにした基板の共締め構造であって、
前記ねじとして通電可能な素材製のものが用いられ、
前記基板において、ねじを挿通させるねじ挿通穴の周囲に、前記電気部品と電気的に接続された基板ランドが形成され、
前記ねじの頭部と基板ランドとの間に、前記ねじの正常な締結状態で、両者にあらかじめ設定された設定荷重以上で接触状態となる通電可能な素材製の検出用部材が設けられていることを特徴とする基板の共締め構造。
A board tightening structure in which a component to be fastened is fastened together between the head of the screw and the board as the board on which the electrical component is mounted is fixed to the fixing target member with a screw. ,
A material made of an energizable material is used as the screw,
In the board, a board land electrically connected to the electrical component is formed around a screw insertion hole through which a screw is inserted.
Between the head of the screw and the substrate land, a detection member made of a material that can be energized is brought into contact with the screw in a normal fastening state and in a contact state at a preset load or higher. A structure for fastening substrates together.
前記被共締め部品は、前記ねじの軸部を挿通可能な挿通穴が開口され、
前記挿通穴の外周部において前記軸方向で前記基板ランドと重なる位置に、前記挿通穴の一部を外径方向に拡げた拡張部が形成され、
前記検出用部材には、前記被共締め部品とねじの頭部との間に挟まれる第1の被挟持部と、前記拡張部を通り前記基板ランドとねじの頭部との間に挟まれる第2の被挟持部と、を備えていることを特徴とする請求項1に記載の基板の共締め構造。
The to-be-fastened component has an insertion hole through which the shaft portion of the screw can be inserted,
In the outer peripheral portion of the insertion hole, an extended portion is formed by expanding a part of the insertion hole in the outer diameter direction at a position overlapping the substrate land in the axial direction.
The detection member is sandwiched between the first sandwiched portion sandwiched between the part to be fastened and the head of the screw, and between the board land and the head of the screw through the extension portion. The joint fastening structure for a substrate according to claim 1, further comprising a second sandwiched portion.
請求項2に記載の検出用部材として用いる金属板製の検出用金具であって、
前記ねじの軸部を挿通可能な挿通穴を中央に有し、前記ねじの頭部と被共締め部品との間に介在可能な寸法の環状に形成された前記第1の被挟持部としての環状部と、
この環状部において、前記基板ランドと軸方向に重なる位置から軸方向に突出された前記第2の被挟持部としての脚部と、
を備えていることを特徴とする検出用金具。
A metal plate detection metal fitting used as the detection member according to claim 2,
As the first sandwiched portion having an insertion hole through which the shaft portion of the screw can be inserted in the center and formed in an annular shape having a dimension that can be interposed between the head portion of the screw and the component to be fastened. An annulus,
In the annular portion, a leg portion as the second sandwiched portion protruding in the axial direction from a position overlapping the substrate land in the axial direction;
A metal fitting for detection characterized by comprising.
前記脚部が、前記環状部の外周に連続して一体に形成され、かつ、環状部の軸心を通る直線に対称に複数設けられていることを特徴とする請求項3に記載の検出用金具。   4. The detection according to claim 3, wherein a plurality of the leg portions are continuously formed integrally with an outer periphery of the annular portion, and are provided symmetrically with respect to a straight line passing through an axis of the annular portion. Hardware. 請求項1または請求項2に記載の基板の共締め構造において、
前記ねじの頭部と電気部品との間に通電し、その通電状態に基づいて、締結状態が正常であるか否かを判定することを特徴とする締結状態検出方法。
In the joint fastening structure of the substrate according to claim 1 or 2,
A fastening state detection method comprising: energizing between a screw head and an electrical component and determining whether or not the fastening state is normal based on the conduction state.
JP2006311094A 2006-11-17 2006-11-17 Substrate co-fastening structure, detecting metal fitting and fastened state detecting method Pending JP2008128284A (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
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Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012209325A (en) * 2011-03-29 2012-10-25 Kokusan Denki Co Ltd Printed circuit board
CN107820548A (en) * 2015-07-02 2018-03-20 伊莱克斯家用电器股份公司 Mode connects for screw

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012209325A (en) * 2011-03-29 2012-10-25 Kokusan Denki Co Ltd Printed circuit board
CN107820548A (en) * 2015-07-02 2018-03-20 伊莱克斯家用电器股份公司 Mode connects for screw

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