JP3834800B2

JP3834800B2 - Terminal fixing structure

Info

Publication number: JP3834800B2
Application number: JP16009696A
Authority: JP
Inventors: 重輝番場
Original assignee: デンセイ・ラムダ株式会社
Priority date: 1996-06-20
Filing date: 1996-06-20
Publication date: 2006-10-18
Anticipated expiration: 2016-06-20
Also published as: JPH1012293A

Description

【０００１】
【発明の属する技術分野】
本発明は、電源装置の出力端子などに適用される端子の固定構造に関する。
【０００２】
【発明が解決しようとする課題】
図３および図４は、従来のこの種の電源装置における出力端子の固定構造を示したものである。同図において、１はシャーシなどの金属製パネル部材、２はこのパネル部材１の開口部３に装着される端子に相当する出力端子であって、出力端子２は、例えば真鍮などの導電性を有するボルト状の端子本体４と、端子本体４の胴部外周を覆うように設けられる絶縁部材たるモールド部材５とにより構成される。モールド部材５は、底部６の上部にこの底部６よりも径大なフランジ部７を形成してなるものであり、モールド部材５の底部６より突出する端子本体４のねじ部８を開口部３に挿入すると、パネル部材１の内面より底部６が突出するとともに、フランジ部７の底面がパネル部材１の外面に当接する。
【０００３】
11は、電源装置の制御回路などを実装する導電板材たるプリント基板、12は出力電流をプリント基板11および出力端子２に供給する電流供給用のバー部材すなわちバスバーであり、これらのプリント基板11およびバスバー12の適所には、端子本体４のねじ部８が挿通可能な開口部13，14が各々設けられている。そして、プリント基板11およびバスバー12の各開口部13，14を、端子本体４のねじ部８に挿通し、金属製の座金15をねじ部８に挿入した後、ねじ部８に止着部材たるナット16を螺入すると、パネル部材１の内側に位置して、モールド部材５の底部６と座金15との間に、プリント基板11およびバスバー12が共に挾持される。このとき、プリント基板11に形成された回路パターンの金属露出部17がバスバー12に当接し、バスバー12からプリント基板11に出力電圧検出用のセンシング電流が流れ込む。また、バスバーからの出力電流は、座金15およびナット16を経由し、端子本体４のねじ部８からパネル部材１の外側に設けられるねじ部８と一体の接続部たるねじ接続部18を通って、図示しない負荷に供給される。
【０００４】
こうした従来の端子の固定構造は、バスバー12からの出力電流が、座金15から金属製のナット16を経由して端子本体４のねじ接続部18に流れ込むが、この間は点接触となっているため接触抵抗が大きく、電圧降下による補正を行なうこともできない。したがって、バスバー12からの電流が増加すると、バスバー12から出ねじ接続部18に至る電圧降下がその分だけ大きくなり、内部損失が増加し、出力端子間電圧とセンシング電圧との不一致により、負荷変動や電源装置自体の効率などを改善できないといった問題を生じる。
【０００５】
そこで本発明は上記問題点に鑑み、バー部材から接続部に至る電流経路の電圧降下を極力低減することのできる端子の固定構造を提供することをその目的とする。
【０００６】
【課題を解決するための手段】
本発明における端子の固定構造は、前記目的を達成するために、絶縁部材の底部にねじ部を突出した端子をパネル部材に装着し、前記ねじ部にバー部材と導電板材をナットで当接状態に止着して、前記バー部材から前記導電板材および前記端子のねじ部に電流を供給する端子の固定構造において、前記絶縁部材より突出して前記ねじ部の基部に金属鍔部を設け、前記バー部材と前記導電板材が前記絶縁部材の底部と前記ナットとの間に挟持さると共に、前記バー部材と前記導電板材との間に、コンタクト部材を前記導電板材に形成された開口部に取り付けた状態で介在させ、前記開口部に挿通された前記金属鍔部の底面及び前記開口部を前記コンタクト部材を介して前記バー部材と電気的に接続して構成される。
【０００７】
上記構成により、バー部材からの出力電流は、コンタクト部材を介してそのまま導電板材に流れ込むとともに、金属鍔部を通過して端子の接続部に流れ込む。つまり、従来は、止着部材を経由して端子のねじ部から接続部に迂回するようにして流れ込んでいたバー部材からの出力電流が、コンタクト部材を介して直接ねじ部の基部にある金属鍔部から接続部に流れ込むことになるため、バー部材からねじ接続部に至る電流経路が短縮し、その間の電圧降下を極力低減することが可能となって、内部損失の低減を図ることができる。
【０００８】
【発明の実施形態】
以下、本発明の一実施例について、添付図面である図１および図２を参照しながら説明する。なお、前記従来技術で示したものと同一箇所には同一符号を付し、その共通する部分の詳細な説明は重複するため省略する。
【０００９】
本実施例では、絶縁部材であるモールド部材５より突出して、ねじ部８の基部に、プリント基板11の開口部13に挿通する金属鍔部21が一体的に設けられる。また、金属鍔部21の底面は、プリント基板11の底面とほぼ同一面をなし、この金属鍔部21の底面に当接する金属製のコンタクト部材22が、プリント基板11の開口部13の外周部に、電気的かつ機械的に半田付けにより、図示しない金属露出部に取付け固定される。このコンタクト部材22は、バスバー12とプリント基板11との間に介在させてあり、金属鍔部21のみならずバスバー12にも当接している。なお、その他の構成は、前記従来技術のものと同一である。
【００１０】
そして、上記構成では、バスバー12からの出力電流は、コンタクト部材22を通過して、プリント基板11の金属露出部17に出力電圧検出用のセンシング電流として流れ込むとともに、コンタクト部材22から金属鍔部21を通過して、端子本体４のねじ接続部18に流れ込む。つまり、従来は座金15からナット16を経由して、端子本体４のねじ部８から外部接続用のねじ接続部18に迂回するバスバー12からの出力電流が、コンタクト部材22を介して直接ねじ部８の基部にある金属鍔部21からねじ接続部18に流れ込むことになるため、バスバー12からねじ接続部18に至る電流経路が短縮し、その間の電圧降下を極力低減することが可能となって、内部損失の低減を図ることができる。また、この出力端子２の固定構造を、出力電圧検出機能を備えた電源装置に適用した場合、プリント基板11は、端子本体４のより近傍でバスバー12からのセンシング電流を受け取ることができるので、負荷変動や電源装置自体の効率などを改善することも可能となる。
【００１１】
以上のように、本実施例によれば、モールド部材５の底部６にねじ接続部18と一体のねじ部８を突出した出力端子２をパネル部材１に装着し、ねじ部８にバスバー12とプリント基板11とをナット16で当接状態に止着して、バスバー12からプリント基板11および出力端子２のねじ部８に電流を供給する端子の固定構造において、モールド部材５の底部６より突出してねじ部８の基部に金属鍔部21を設け、バスバー12とプリント基板11がモールド部材５の底部６とナット16との間に挟持され、プリント基板11に形成された開口部13に挿通された金属鍔部21の底面をバスバー12と電気的に接続してあるので、バスバー12からねじ接続部18に至る電流経路の電圧降下を極力低減して、内部損失の低減を図ることが可能となる。
【００１２】
この場合、実施例ではバスバー12からプリント基板11にセンシング電流を供給するように構成してあるが、プリント基板11にバスバー12と同様の導電バー部材を用いてもよく、要は、バスバー12からの出力電流の一部が、バスバー12との当接により供給される導電板材であればよい。また、絶縁部材であるモールド部材５や、接続部であるねじ接続部18の形状などは、実施例のものに限定されることはない。例えば、ねじ接続部のねじは必ずしも形成しなくてもよく、先端に開口部を有する連結部を形成してもよい。また、プリント基板11とバスバー12とを、ナット16に代わり別の止着部材で止着するようにしてもよい。
【００１３】
さらに本実施例では、導電部材がプリント基板11である場合に、金属鍔部21およびバスバー12に当接する金属製のコンタクト部材22を、プリント基板11に電気的かつ機械的に取り付けてある。したがって、共通のコンタクト部材22により、バスバー12からの出力電流を確実に金属鍔部21ひいてはねじ接続部18およびプリント基板11に供給することができ、バスバー12とプリント基板11間、およびバスバー12と金属鍔部21間の電圧降下の差をさらに縮めることが可能となる。
【００１４】
なお、本発明は上記実施例に限定されるものではなく、本発明の要旨の範囲において種々の変形実施が可能である。実施例では電源装置の出力端子について説明を行なったが、それ以外のものにも本発明の端子の固定構造を適用することができる。
【００１５】
【発明の効果】
本発明の端子の固定構造は、前記目的を達成するために、絶縁部材の底部にねじ部を突出した端子をパネル部材に装着し、前記ねじ部にバー部材と導電板材をナットで当接状態に止着して、前記バー部材から前記導電板材および前記端子のねじ部に電流を供給する端子の固定構造において、前記絶縁部材より突出して前記ねじ部の基部に金属鍔部を設けて構成され、バー部材から接続部に至る電流経路の電圧降下を極力低減して、内部損失の低減を図ることが可能となる。
【図面の簡単な説明】
【図１】本発明の一実施例を示す断面図である。
【図２】同上出力端子の正面図である。
【図３】従来例を示す断面図である。
【図４】従来例を示す出力端子の正面図である。
【符号の説明】
１パネル部材
２出力端子（端子）
５モールド部材（絶縁部材）
８ねじ部
11 プリント基板（導電板材）
12 バスバー（バー部材）
13 開口部
16 ナット（止着部材）
18 ねじ接続部（接続部）
21 金属鍔部
22 コンタクト部材 [0001]
BACKGROUND OF THE INVENTION
The present invention relates to a terminal fixing structure applied to an output terminal or the like of a power supply device.
[0002]
[Problems to be solved by the invention]
3 and 4 show a fixing structure of the output terminal in this type of conventional power supply apparatus. In the figure, reference numeral 1 denotes a metal panel member such as a chassis, 2 denotes an output terminal corresponding to a terminal attached to the opening 3 of the panel member 1, and the output terminal 2 is made of a conductive material such as brass. It has a bolt-shaped terminal body 4 and a mold member 5 which is an insulating member provided so as to cover the outer periphery of the body portion of the terminal body 4. The mold member 5 is formed by forming a flange portion 7 having a diameter larger than that of the bottom portion 6 at the upper portion of the bottom portion 6, and the screw portion 8 of the terminal body 4 protruding from the bottom portion 6 of the mold member 5 is opened to the opening portion 3. Is inserted into the panel member 1, the bottom portion 6 protrudes from the inner surface of the panel member 1, and the bottom surface of the flange portion 7 contacts the outer surface of the panel member 1.
[0003]
11 is a printed circuit board which is a conductive plate material for mounting a control circuit of the power supply device, and 12 is a bar member for supplying current to the printed circuit board 11 and the output terminal 2, that is, a bus bar. At appropriate positions of the bus bar 12, openings 13 and 14 through which the screw portions 8 of the terminal body 4 can be inserted are provided. Then, the openings 13 and 14 of the printed circuit board 11 and the bus bar 12 are inserted into the screw portion 8 of the terminal body 4 and the metal washer 15 is inserted into the screw portion 8. When the nut 16 is screwed in, the printed circuit board 11 and the bus bar 12 are both clamped between the bottom 6 of the mold member 5 and the washer 15 located inside the panel member 1. At this time, the metal exposed portion 17 of the circuit pattern formed on the printed circuit board 11 comes into contact with the bus bar 12, and a sensing current for detecting output voltage flows from the bus bar 12 to the printed circuit board 11. Further, the output current from the bus bar passes through the washer 15 and the nut 16, and passes through the screw connection portion 18 that is an integral connection portion with the screw portion 8 provided outside the panel member 1 from the screw portion 8 of the terminal body 4. , Supplied to a load (not shown).
[0004]
In such a conventional terminal fixing structure, the output current from the bus bar 12 flows from the washer 15 through the metal nut 16 into the screw connection portion 18 of the terminal body 4, and this is a point contact. The contact resistance is large, and correction by voltage drop cannot be performed. Therefore, when the current from the bus bar 12 increases, the voltage drop from the bus bar 12 to the lead screw connection 18 increases accordingly, the internal loss increases, and the load fluctuations due to the mismatch between the output terminal voltage and the sensing voltage. And the efficiency of the power supply device itself cannot be improved.
[0005]
In view of the above problems, an object of the present invention is to provide a terminal fixing structure capable of reducing the voltage drop in the current path from the bar member to the connecting portion as much as possible.
[0006]
[Means for Solving the Problems]
In the terminal fixing structure according to the present invention, in order to achieve the above object, a terminal having a threaded portion protruding from the bottom of the insulating member is attached to the panel member, and a bar member and a conductive plate material are in contact with the threaded portion by a nut. In the terminal fixing structure for supplying current to the conductive plate member and the screw portion of the terminal from the bar member, a metal collar is provided at the base of the screw portion so as to protrude from the insulating member, the holding of between the bottom and the nut of the the member conductive plate is the insulating member Rutotomoni, between the bar member and the conductive plate material, attached to an opening formed the contact member to the conductive plate It is interposed in a state, which are connected to the bar member and electrically the bottom and the opening of the metal flange portion is inserted into the opening through the contact member.
[0007]
With the above configuration, the output current from the bar member flows into the conductive plate as it is through the contact member, and also flows into the terminal connection through the metal flange. In other words, conventionally, the output current from the bar member, which has flown so as to be diverted from the screw portion of the terminal to the connection portion via the fastening member, is directly connected to the metal rod at the base portion of the screw portion via the contact member. Therefore, the current path from the bar member to the screw connection portion is shortened, the voltage drop between them can be reduced as much as possible, and the internal loss can be reduced.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 and 2 which are attached drawings. In addition, the same code | symbol is attached | subjected to the same location as what was shown by the said prior art, and detailed description of the common part overlaps and it abbreviate | omits.
[0009]
In the present embodiment, a metal flange 21 that protrudes from the mold member 5 that is an insulating member and is inserted into the opening 13 of the printed board 11 is integrally provided at the base of the screw portion 8. Further, the bottom surface of the metal collar portion 21 is substantially flush with the bottom surface of the printed circuit board 11, and a metal contact member 22 that contacts the bottom surface of the metal collar section 21 is an outer peripheral portion of the opening portion 13 of the printed circuit board 11. In addition, it is fixedly attached to a metal exposed portion (not shown) by electrical and mechanical soldering. The contact member 22 is interposed between the bus bar 12 and the printed circuit board 11 and is in contact with not only the metal flange 21 but also the bus bar 12. The other configurations are the same as those of the prior art.
[0010]
In the above configuration, the output current from the bus bar 12 passes through the contact member 22 and flows into the metal exposed portion 17 of the printed circuit board 11 as a sensing current for detecting the output voltage, and from the contact member 22 to the metal flange portion 21. And flows into the screw connection portion 18 of the terminal body 4. That is, conventionally, the output current from the bus bar 12 bypassing from the screw part 8 of the terminal body 4 to the screw connection part 18 for external connection via the nut 16 from the washer 15 is directly connected to the screw part via the contact member 22. 8 will flow from the metal flange 21 at the base of the screw 8 into the screw connection 18, so that the current path from the bus bar 12 to the screw connection 18 is shortened, and the voltage drop between them can be reduced as much as possible. The internal loss can be reduced. In addition, when this fixing structure of the output terminal 2 is applied to a power supply device having an output voltage detection function, the printed circuit board 11 can receive a sensing current from the bus bar 12 closer to the terminal body 4. It is also possible to improve the load fluctuation and the efficiency of the power supply device itself.
[0011]
As described above, according to the present embodiment, the output terminal 2 protruding from the screw connection portion 18 and the screw connection portion 18 is attached to the panel member 1 at the bottom portion 6 of the mold member 5, and the bus bar 12 is connected to the screw portion 8. In the terminal fixing structure in which the printed circuit board 11 is fixed in contact with the nut 16 and current is supplied from the bus bar 12 to the printed circuit board 11 and the screw portion 8 of the output terminal 2, it protrudes from the bottom 6 of the mold member 5. A metal flange 21 is provided at the base of the screw portion 8, and the bus bar 12 and the printed board 11 are sandwiched between the bottom 6 of the mold member 5 and the nut 16 and are inserted into the opening 13 formed in the printed board 11. Since the bottom surface of the metal flange 21 is electrically connected to the bus bar 12, the voltage drop in the current path from the bus bar 12 to the screw connection 18 can be reduced as much as possible to reduce internal loss. Become.
[0012]
In this case, the embodiment is configured to supply a sensing current from the bus bar 12 to the printed board 11. However, a conductive bar member similar to the bus bar 12 may be used for the printed board 11, and in short, from the bus bar 12. A part of the output current may be a conductive plate material supplied by contact with the bus bar 12. Further, the shape of the mold member 5 that is an insulating member and the shape of the screw connection portion 18 that is a connection portion are not limited to those of the embodiment. For example, the screw of the screw connection portion does not necessarily have to be formed, and a connecting portion having an opening at the tip may be formed. Further, the printed circuit board 11 and the bus bar 12 may be fastened by another fastening member instead of the nut 16.
[0013]
Further, in the present embodiment, when the conductive member is the printed board 11, the metal contact member 22 that contacts the metal collar portion 21 and the bus bar 12 is electrically and mechanically attached to the printed board 11. Therefore, the common contact member 22 can reliably supply the output current from the bus bar 12 to the metal flange 21 and the screw connection 18 and the printed circuit board 11, and between the bus bar 12 and the printed circuit board 11, and the bus bar 12. It is possible to further reduce the voltage drop difference between the metal flanges 21.
[0014]
In addition, this invention is not limited to the said Example, A various deformation | transformation implementation is possible in the range of the summary of this invention. Although the output terminal of the power supply device has been described in the embodiment, the terminal fixing structure of the present invention can be applied to other terminals.
[0015]
【The invention's effect】
In the terminal fixing structure of the present invention, in order to achieve the above object, a terminal having a threaded portion protruding from the bottom of the insulating member is attached to the panel member, and a bar member and a conductive plate material are in contact with the threaded portion by a nut. In the terminal fixing structure for supplying current from the bar member to the conductive plate member and the screw portion of the terminal, a metal collar portion is provided at the base portion of the screw portion protruding from the insulating member. The voltage drop in the current path from the bar member to the connection portion can be reduced as much as possible to reduce the internal loss.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of the present invention.
FIG. 2 is a front view of the output terminal.
FIG. 3 is a cross-sectional view showing a conventional example.
FIG. 4 is a front view of an output terminal showing a conventional example.
[Explanation of symbols]
1 Panel member 2 Output terminal (terminal)
5 Mold member (insulating member)
8 Screw part
11 Printed circuit board (conductive plate material)
12 Bus bar (bar material)
13 opening
16 Nut (fastening member)
18 Screw connection (connection)
21 Metal collar
22 Contact material

Claims

At the bottom of the insulating member, a terminal protruding from the threaded portion integral with the connecting portion is attached to the panel member, and the bar member and the conductive plate material are fixed to the threaded portion in contact with the nut by the nut. In the fixing structure of the terminal for supplying current to the conductive plate member and the screw portion of the terminal, a metal flange is provided at the base portion of the screw portion so as to protrude from the bottom portion of the insulating member, and the bar member and the conductive plate member are the insulating member. the bottom of the sandwiched between the nut Rutotomoni, between the conductive plate and the bar member, is interposed in a state attached to an opening formed the contact member to the conductive plate, the opening A terminal fixing structure, wherein a bottom surface of the inserted metal collar and the opening are electrically connected to the bar member via the contact member .