JP2018101563A - Wire connection structure in electrical apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire connection structure in electrical apparatus capable of preventing such a situation where the insertion amount of wire is too much or insufficient to cause incomplete insertion, by understanding the insertion state of wire from the initial state of insertion till completion of insertion, without increasing an opening for display formed in a case.SOLUTION: A wire connection structure includes a display member 32 arranged in a wire insertion space 22 freely movably in the wire insertion direction (lower direction shown by an arrow F) and the opposite direction (upper direction shown by an arrow E). The display member 32 has a wire contact portion 32a with which the core wire W1 of a wire W comes into contact, and a display part 32b extending from the wire contact portion 32a in the opposite direction (upper direction shown by an arrow E), and being inserted into an opening 24 for display part formed in the case lid 2b of a case 2. The display part 32b projects from the opening 24 for display part when the wire W is not inserted, and is flush with the external surface (top face) of the case lid 2b upon completion of wire insertion.SELECTED DRAWING: Figure 8

Description

本発明は、電磁接触器や回路遮断器などの電気機器における電線接続構造に関する。   The present invention relates to a wire connection structure in electrical equipment such as an electromagnetic contactor and a circuit breaker.

電磁接触器や回路遮断器などの電気機器においては、電線が接続されるのが一般的ある。
この電気機器に電線を接続するに際し、ねじ締め作業を必要とせずに、電線を電気機器の電線差込口から機器本体内に挿入するだけで電線を端子に接続できるようにした電線接続構造として、例えば、特許文献１に示す回路遮断器の端子構造が知られている。 In electrical devices such as magnetic contactors and circuit breakers, electric wires are generally connected.
When connecting electric wires to this electrical device, as a wire connection structure that allows the wires to be connected to the terminals simply by inserting the wires into the device main body from the wire insertion port of the electric device without the need for screw tightening work. For example, a terminal structure of a circuit breaker disclosed in Patent Document 1 is known.

この特許文献１に示す回路遮断器の端子構造では、先端の被覆が除去された電線を回路遮断器の端子口に挿入し、その電線を押し込み操作することにより電線の先端が端子金具と速結ばねとの間に入り込み、速結ばねが一方向に変位する。そして、この挿入操作が、電線の先端が電線接続空間の奥部に達するまで行われると、変形した速結ばねの復元力で電線が端子金具側へ押圧され、電線と端子金具との電気的接続が達成される。   In the circuit breaker terminal structure disclosed in Patent Document 1, an electric wire from which the coating of the tip is removed is inserted into a terminal port of the circuit breaker, and the electric wire is pushed in so that the tip of the electric wire is quickly connected to the terminal fitting. It enters between the cats and the quick-connect spring is displaced in one direction. Then, when this insertion operation is performed until the tip of the electric wire reaches the inner part of the electric wire connection space, the electric wire is pressed toward the terminal fitting side by the restoring force of the deformed quick-connection spring, and the electric wire and the terminal fitting are electrically connected. Connection is achieved.

しかしながら、この特許文献１に示した回路遮断器の端子構造にあっては、電線の挿入量を表示する機能がないため、実際に電線の挿入量がどれくらいかを把握することができない。このため、電線の挿入量が多すぎたり、あるいは電線の挿入量が足りずに不完全挿入となってしまうことがある。
この問題を解決するため、例えば、特許文献２では、電線と端子との接続状態を表示するようにした速結端子の電線接続構造が提案されている。 However, the circuit breaker terminal structure disclosed in Patent Document 1 does not have a function of displaying the amount of inserted wire, and therefore cannot know how much the amount of inserted wire is actually. For this reason, there is a case where the insertion amount of the electric wire is too large, or the insertion amount of the electric wire is insufficient and the insertion is incomplete.
In order to solve this problem, for example, Patent Literature 2 proposes a wire connection structure of a quick connection terminal that displays a connection state between an electric wire and a terminal.

特許文献２に示された電線接続構造においては、初期状態で表示部材が復帰用弾性部材の作用により、ケースに形成された開口部から表示部が目視できない位置に位置規制されている。そして、電線をケースに形成された電線挿入口より挿入すると、電線が速結端子ばね部材の第一当接部に当接し、更に電線の挿入を進行させると、電線は速結端子ばね部材を撓ませながら内部方向に入っていって第二当接部に当接し、更に電線は第二当接部を撓ませながら内部方向に入っていき表示部材の電線当接部に当接する。   In the electric wire connection structure disclosed in Patent Document 2, the position of the display member is restricted to the position where the display unit cannot be seen from the opening formed in the case by the action of the return elastic member in the initial state. Then, when the electric wire is inserted from the electric wire insertion port formed in the case, the electric wire comes into contact with the first contact portion of the quick connection terminal spring member, and when the electric wire is further inserted, the electric wire moves the quick connection terminal spring member. While being bent, it enters the inner direction and comes into contact with the second contact portion, and further, the electric wire enters the inner direction while bending the second contact portion and comes into contact with the electric wire contact portion of the display member.

そして、電線を更に挿入すると、表示部材が回動軸を中心として復帰用弾性部材の付勢力に抗して時計回りに回転し始め、更に電線を押し込むと表示部材が規制部に当接し、表示部は固定される。表示部材は、電線の先端が電線当接部に当接してからこの位置までは電線挿入量に比例して回転し、この位置では、表示部は開口部に対して全て露出する。
そして、表示部が開口部に対して全て露出した状態からさらに電線を押し込むと、表示部材の電線当接部は撓み始め、ケースの規制部に突き当たり接続が完了する。
このように、特許文献２に示された電線接続構造によれば、表示部材が電線挿入量に比例して回転し、表示部材に設けられた表示部がケースに形成された開口部に対して露出するので、電線と端子との接続状態を表示することができる。 When the electric wire is further inserted, the display member starts to rotate clockwise against the urging force of the return elastic member around the rotation axis, and when the electric wire is further pushed, the display member comes into contact with the restricting portion, The part is fixed. The display member rotates in proportion to the amount of insertion of the electric wire from the time when the tip of the electric wire comes into contact with the electric wire contact portion, and at this position, the display portion is entirely exposed to the opening.
When the electric wire is further pushed in from a state in which the display portion is entirely exposed to the opening, the electric wire contact portion of the display member starts to bend, and the connection is completed by hitting the regulation portion of the case.
Thus, according to the electric wire connection structure shown in Patent Document 2, the display member rotates in proportion to the amount of electric wire insertion, and the display portion provided on the display member is relative to the opening formed in the case. Since it is exposed, the connection state between the electric wire and the terminal can be displayed.

特許第５０５５０８２号公報Japanese Patent No. 5055082 特許第３９２５９０９号公報Japanese Patent No. 3925909

しかしながら、特許文献２に記載された速結端子の電線接続構造にあっては、以下の問題点があった。
即ち、特許文献２に記載された電線接続構造の場合、電線と端子との接続が完了する前に、表示部の一部が開口部に対し露出するので、作業者がこの開口部に露出された当接部を視認して接続完了と勘違いしてしまうことがある。そうすると、電線の不完全挿入となってしまう。 However, the wire connection structure of the quick connection terminal described in Patent Document 2 has the following problems.
That is, in the case of the electric wire connection structure described in Patent Document 2, a part of the display unit is exposed to the opening before the connection between the electric wire and the terminal is completed, so that the operator is exposed to the opening. The contact portion may be visually recognized and mistaken for connection completion. If it does so, it will be incomplete insertion of an electric wire.

また、特許文献２では、電線の挿入初期時には表示部が開口部に対し露出していないが、電線を挿入する初期状態から挿入完了までの間、表示部の動きをすべて開口部に対し露出するようにすると、表示部の動きから電線の挿入状態が把握できるので、電線の不完全挿入を回避することができる。しかし、表示部材が回転するように構成され、表示部の開口部に対する露出量が電線の挿入量に比例するようになっているため、電線を挿入する初期状態から挿入完了までの間、表示部の動きをすべて開口部に対し露出するようにすると、開口部の面積が大きくなりすぎ、開口部から異物が混入してしまうおそれがある。   Moreover, in patent document 2, although the display part is not exposed with respect to an opening part at the time of the initial stage of insertion of an electric wire, all the movements of a display part are exposed with respect to an opening part from the initial state which inserts an electric wire to insertion completion. If it does in this way, since the insertion state of an electric wire can be grasped | ascertained from the motion of a display part, incomplete insertion of an electric wire can be avoided. However, since the display member is configured to rotate and the amount of exposure with respect to the opening of the display unit is proportional to the amount of insertion of the electric wire, the display unit is in an initial state from when the electric wire is inserted until the insertion is completed. If all the movements are exposed to the opening, the area of the opening becomes too large, and foreign matter may be mixed from the opening.

従って、本発明はこの従来の問題点を解決するためになされたものであり、その目的は、ケースに形成された表示部用開口部を大きくすることなく、電線を挿入する初期状態から挿入完了までの間電線の挿入状態を把握し、電線の挿入量が多すぎたり、あるいは電線の挿入量が足りずに不完全挿入となってしまうことを防止することができる電気機器における電線接続構造を提供することにある。   Therefore, the present invention has been made to solve this conventional problem, and its purpose is to complete insertion from the initial state of inserting an electric wire without enlarging the display opening formed in the case. The wire connection structure in the electrical equipment that can grasp the insertion state of the electric wire and prevent the insertion amount of the electric wire too much or the incomplete insertion due to insufficient insertion amount of the electric wire It is to provide.

上記目的を達成するために、本発明の一態様に係る電気機器における電線接続構造は、端子金具を内部に収容するとともに、内部に電線挿入空間を形成し、外面と前記電線挿入空間とを連通するように形成された電線挿入口及び表示部用開口部を有するケースと、前記端子金具に接続されるとともに前記電線挿入空間内に配置された、前記電線挿入口から前記電線挿入空間内に電線挿入方向に挿入される電線の芯線を弾性保持する電線保持用弾性部材と、前記電線挿入方向及びその反対方向に移動自在に前記電線挿入空間内に配置され、前記電線の芯線が当接する電線当接部と、該電線当接部から前記反対方向に延び、前記表示部開口部に挿通される表示部とを有し、該表示部が、前記電線の不挿入時に前記表示部開口部から突出し、前記電線の挿入完了時に前記ケースの外面と面一になる表示部材と、前記電線挿入空間内に設けられ、前記電線の挿入完了時に前記表示部材の前記電線当接部が当接して、前記表示部材の前記電線挿入方向への移動を規制するストッパーと、前記電線挿入空間内に配置され、前記表示部材を前記電線挿入方向に付勢する復帰用弾性部材とを備えていることを要旨とする。   In order to achieve the above object, an electric wire connection structure in an electric apparatus according to an aspect of the present invention accommodates a terminal fitting therein, forms an electric wire insertion space therein, and communicates the outer surface with the electric wire insertion space. A case having a wire insertion opening and a display portion opening formed so as to be connected to the terminal fitting and arranged in the wire insertion space, the electric wire from the wire insertion opening to the wire insertion space. An electric wire holding elastic member for elastically holding the core wire of the electric wire inserted in the insertion direction, and an electric wire holder that is disposed in the electric wire insertion space so as to be movable in the electric wire insertion direction and the opposite direction, and in contact with the electric wire core wire. A display portion that extends in the opposite direction from the wire contact portion and is inserted through the display portion opening, and the display portion protrudes from the display portion opening when the wire is not inserted. , The electric A display member that is flush with the outer surface of the case when the insertion is completed, and the electric wire abutting portion of the display member is in contact with the display member when the insertion of the electric wire is completed. The gist is provided with a stopper that restricts movement in the electric wire insertion direction and a return elastic member that is disposed in the electric wire insertion space and biases the display member in the electric wire insertion direction.

本発明に係る気機器における電線接続構造によれば、ケースに形成された表示部用開口部を大きくすることなく、電線を挿入する初期状態から挿入完了までの間電線の挿入状態を把握し、電線の挿入量が多すぎたり、あるいは電線の挿入量が足りずに不完全挿入となってしまうことを防止することができる電気機器における電線接続構造を提供できる。   According to the electric wire connection structure in the air device according to the present invention, without increasing the display portion opening formed in the case, grasp the insertion state of the electric wire from the initial state of inserting the electric wire to the completion of insertion, It is possible to provide an electric wire connection structure in an electric device that can prevent the insertion amount of the electric wire from being excessive or the incomplete insertion due to the insufficient insertion amount of the electric wire.

本発明の一実施形態に係る電線接続構造が適用される電磁接触器の斜視図である。It is a perspective view of an electromagnetic contactor to which an electric wire connection structure concerning one embodiment of the present invention is applied. 図１に示す電磁接触器に電線が接続された状態の斜視図である。It is a perspective view in the state where the electric wire was connected to the electromagnetic contactor shown in FIG. 図１に示す電磁接触器からケース蓋体を外した状態の斜視図である。It is a perspective view of the state which removed the case cover from the electromagnetic contactor shown in FIG. 図３に示すケース蓋体を外した電磁接触器の平面図である。It is a top view of the electromagnetic contactor which removed the case cover body shown in FIG. 電線接続構造における端子金具としての左側の固定接触子、左側の電線保持用弾性部材、左側の表示部材、左側のストッパー及び左側の復帰用弾性部材としての圧縮コイルばねの関係を示す斜視図である。It is a perspective view which shows the relationship of the compression coil spring as a left side fixed contact as a terminal metal fitting in a wire connection structure, a left side wire holding elastic member, a left side display member, a left side stopper, and a left side return elastic member. . 電線接続構造における端子金具としての左側の固定接触子、左側の電線保持用弾性部材、左側の表示部材、左側のストッパー及び左側の復帰用弾性部材としての圧縮コイルばねの関係を示す斜視図である。It is a perspective view which shows the relationship of the compression coil spring as a left side fixed contact as a terminal metal fitting in a wire connection structure, a left side wire holding elastic member, a left side display member, a left side stopper, and a left side return elastic member. . 電線が接続される前の電線接続構造を説明するための図である。It is a figure for demonstrating the electric wire connection structure before an electric wire is connected. 電線が接続された後の電線接続構造を説明するための図である。It is a figure for demonstrating the electric wire connection structure after an electric wire is connected.

以下、本発明の実施形態について図面を参照して説明する。
本発明の一実施形態に係る電線接続構造が適用される電気機器としての電磁接触器が図１及び図２に示されている。
本発明の一実施形態に係る電線接続構造が適用される電気機器は、図１及び図２に示す電磁接触器のみならず、回路遮断器や安全ブレーカーなど電線を差し込んで接続できる電気機器であれば適用できる。 Embodiments of the present invention will be described below with reference to the drawings.
1 and 2 show an electromagnetic contactor as an electric device to which a wire connection structure according to an embodiment of the present invention is applied.
The electric equipment to which the electric wire connection structure according to an embodiment of the present invention is applied is not only the electromagnetic contactor shown in FIGS. 1 and 2 but also an electric equipment that can be connected by inserting electric wires, such as a circuit breaker and a safety breaker. If applicable.

図１及び図２に示す電磁接触器１は、一方側の電源と他方側の負荷との間の電流路の開閉を行うものであり、図３及び図４に示す接点機構１０と、接点機構１０を駆動する図示しない電磁石ユニットと、接点機構１０及び電磁石ユニットを内部に収容するケース２とを備えている。
ここで、ケース２は、図１乃至図４に示すように、前後方向（図１乃至図４における矢印Ａで示す方向が前方向、矢印Ｂで示す方向が後方向）、左右方向（図１乃至図４における矢印Ｃで示す方向が左方向、矢印Ｄで示す方向が右方向）及び上下方向（図１乃至図３における矢印Ｅで示す方向が上方向、矢印Ｆで示す方向が下方向）に延びる略矩形状のケース本体２ａと、上側が開口するケース本体２ａを上方から覆うケース蓋体２ｂとを備えている。 An electromagnetic contactor 1 shown in FIGS. 1 and 2 opens and closes a current path between a power source on one side and a load on the other side. The contact mechanism 10 shown in FIGS. 10 includes an electromagnet unit (not shown) that drives 10 and a case 2 that accommodates the contact mechanism 10 and the electromagnet unit therein.
Here, as shown in FIGS. 1 to 4, the case 2 has a front-rear direction (a direction indicated by an arrow A in FIGS. 1 to 4 is a front direction, a direction indicated by an arrow B is a rear direction), and a left-right direction (FIG. 1). The direction indicated by the arrow C in FIG. 4 is the left direction, the direction indicated by the arrow D is the right direction) and the vertical direction (the direction indicated by the arrow E in FIGS. 1 to 3 is the upward direction, and the direction indicated by the arrow F is the downward direction). And a case lid 2b that covers the case main body 2a that opens upward from above.

ケース本体２ａには、図３及び図４に示すように、左右方向の中央部に接点機構１０を収容する接点機構収容凹部２１が形成され、接点機構収容凹部２１の下方には、図示しない電磁石ユニット収容部が形成されている。接点機構収容凹部２１には、接点機構１０が収容され、電磁石ユニット収容部には、電磁石ユニットが収容される。また、ケース本体２ａの接点機構収容凹部２１を挟んで左右両側には、複数対（本実施形態にあっては５対）の電線挿入空間２２が形成されている。隣接する電線挿入空間２２の間には隔壁２２ａが設けられている。各電線挿入空間２２は、後述する固定接触子１１が１つに対し１つ設けられる。   As shown in FIGS. 3 and 4, the case body 2 a is formed with a contact mechanism accommodating recess 21 that accommodates the contact mechanism 10 at the center in the left-right direction, and an electromagnet (not shown) below the contact mechanism accommodating recess 21. A unit housing portion is formed. The contact mechanism accommodating recess 21 accommodates the contact mechanism 10, and the electromagnet unit accommodating portion accommodates the electromagnet unit. A plurality of pairs (five pairs in the present embodiment) of wire insertion spaces 22 are formed on both the left and right sides of the contact mechanism housing recess 21 of the case body 2a. A partition wall 22a is provided between adjacent electric wire insertion spaces 22. Each electric wire insertion space 22 is provided with one fixed contact 11 described later.

また、図１、図２、図７及び図８に示すように、ケース蓋体２ｂには、ケース蓋体２ｂの外面（上面）と電線挿入空間２２とを連通するように形成された複数の電線挿入口２３が設けられている。電線挿入口２３は、１つの電線挿入空間２２に対して２個設けられており、本実施形態にあっては、電線挿入空間２２が５対設けられていることから、１０対設けられている。また、ケース蓋体２ｂには、ケース蓋体２ｂの外面（上面）と電線挿入空間２２とを連通するように形成された複数の表示部用開口部２４が設けられている。表示部用開口部２４は、１つの電線挿入空間２２に対して１個設けられており、本実施形態にあっては、電線挿入空間２２が５対設けられている。核表示部用開口部２４の設置位置は、図１及び図２に示すように、電線挿入口２３に対して左右方向内側の位置である。また、各表示部用開口部２４の開口面積は、後述する表示部２２ｂが挿通できる面積であればよく、表示部２２ｂの断面積とほぼ同一になっている。   Moreover, as shown in FIGS. 1, 2, 7 and 8, the case lid 2b has a plurality of pieces formed so as to communicate the outer surface (upper surface) of the case lid 2b and the wire insertion space 22. An electric wire insertion port 23 is provided. Two electric wire insertion openings 23 are provided for one electric wire insertion space 22, and in this embodiment, ten pairs of electric wire insertion openings 22 are provided since five electric wire insertion spaces 22 are provided. . The case lid 2b is provided with a plurality of display portion openings 24 formed to communicate the outer surface (upper surface) of the case lid 2b and the wire insertion space 22. One display portion opening 24 is provided for one electric wire insertion space 22, and in the present embodiment, five pairs of electric wire insertion spaces 22 are provided. As shown in FIGS. 1 and 2, the installation position of the nucleus display portion opening 24 is a position on the inner side in the left-right direction with respect to the wire insertion opening 23. Moreover, the opening area of each display part opening part 24 should just be an area which can penetrate the display part 22b mentioned later, and is substantially the same as the cross-sectional area of the display part 22b.

そして、接点機構１０は、図４に示すように、左右方向離れてケース本体２ａに固定された複数対（本実施形態にあっては５対）の固定接触子１１と、各対の固定接触子１１に接離可能な複数（本実施形態にあっては５個）の可動接触子１２とを備えている。複数の可動接触子１２は、前後方向に細長く延びる可動接触子支持部材１３に前後方向に沿って所定間隔で固定されている。可動接触子支持部材１３は、電磁石ユニットのコイルが励磁されると、図示しない駆動レバーを介して矢印Ｂで示す後方向に移動し、可動接触子支持部材１３に固定された複数の可動接触子１２の各々が各対の固定接触子１１に接触する。これにより、一方側である左側の固定接触子１１と他方側である右側の固定接触子１１とが可動接触子１２を介して導通し、電流路を閉じることになる。一方、電磁ユニットのコイルが非励磁状態になると、可動接触子支持部材１３は、図示しない復帰スプリングの作用により、矢印Ａで示す前方向に移動し、可動接触子支持部材１３に固定された複数の可動接触子１２の各々が各対の固定接触子１１から離れる。これにより、一方側である左側の固定接触子１１と他方側である右側の固定接触子１１とが遮断される。   Then, as shown in FIG. 4, the contact mechanism 10 includes a plurality of pairs (five pairs in the present embodiment) of fixed contacts 11 fixed to the case body 2a in the left-right direction, and a fixed contact of each pair. A plurality of (5 in the present embodiment) movable contacts 12 that can contact and separate from the child 11 are provided. The plurality of movable contacts 12 are fixed at predetermined intervals along the front-rear direction to a movable contact support member 13 that is elongated in the front-rear direction. When the coil of the electromagnet unit is excited, the movable contact support member 13 moves in a backward direction indicated by an arrow B via a drive lever (not shown), and a plurality of movable contact members fixed to the movable contact support member 13. Each of 12 contacts each pair of stationary contacts 11. As a result, the left fixed contact 11 on one side and the right fixed contact 11 on the other side are conducted through the movable contact 12 to close the current path. On the other hand, when the coil of the electromagnetic unit is in a non-excited state, the movable contact support member 13 moves in the forward direction indicated by the arrow A by the action of a return spring (not shown), and is fixed to the movable contact support member 13. Each movable contact 12 is separated from each pair of fixed contacts 11. As a result, the left fixed contact 11 on one side and the right fixed contact 11 on the other side are blocked.

ここで、本実施形態に係る電線接続構造は、図１、図２、図５乃至図８に示すように、電線Ｗを端子金具としての固定接触子１１に接続するものであり、前述のケース２と、対をなす左側及び右側の電線保持用弾性部材３１と、対をなす左側及び右側の表示部材３２と、対をなす左側及び右側のストッパー３３と、対をなす左側及び右側の復帰用弾性部材としての圧縮コイルばね３４とを備えている。   Here, the wire connection structure according to the present embodiment connects the wire W to the stationary contact 11 as a terminal fitting as shown in FIGS. 1, 2, and 5 to 8, and the case described above. 2, left and right wire holding elastic members 31 that make a pair, left and right display members 32 that make a pair, left and right stoppers 33 that make a pair, and left and right return members that make a pair And a compression coil spring 34 as an elastic member.

先ず、接続される電線Ｗは、図２及び図８に示すように、多数の金属線材からなる芯線Ｗ１と、芯線Ｗ１の外周を被覆する絶縁被覆Ｗ２とを備えている。電線Ｗを固定接触子１１に接続する際には、絶縁被覆Ｗ２の先端部分が除去され、芯線Ｗ１が所定部分だけ露出する。この際に、多数の金属線材からなる芯線Ｗ１がばらばらにならないように、露出した芯線Ｗ１の周囲には、図２及び図８に示すように、絶縁フェルールＷ３が取り付けられる。   First, as shown in FIGS. 2 and 8, the electric wire W to be connected includes a core wire W1 made of a number of metal wires, and an insulating coating W2 that covers the outer periphery of the core wire W1. When connecting the electric wire W to the fixed contact 11, the tip portion of the insulating coating W2 is removed, and only a predetermined portion of the core wire W1 is exposed. At this time, an insulating ferrule W3 is attached around the exposed core wire W1, as shown in FIGS. 2 and 8, so that the core wire W1 made of a large number of metal wires does not fall apart.

また、固定接触子１１については、対をなす左側の固定接触子１１及び右側の固定接触子１１は線対称形状となっているため、左側の固定接触子１１の構成のみについて説明する。この左側の固定接触子１１は、図５乃至図８に示すように、可動接触子１２が接触する平板状の固定接点部１１ａと、固定接点部１１ａから後方に折り曲げられた平板状の基板部１１ｂと、基板部１１ｂの下端から左方（右側の固定接触子１１では右方）に延びる座板部１１ｃと、座板部１１ｃから上方に立ち上がる平板状の固定接触子側電線保持部１１ｄとを備えている。固定接触子１１は、金属板を打抜き及び曲げ加工することによって形成される。   Further, regarding the fixed contact 11, the left fixed contact 11 and the right fixed contact 11 that form a pair have a line-symmetric shape, and therefore only the configuration of the left fixed contact 11 will be described. As shown in FIGS. 5 to 8, the left fixed contact 11 includes a flat fixed contact portion 11a with which the movable contact 12 contacts, and a flat substrate portion bent backward from the fixed contact portion 11a. 11b, a seat plate portion 11c extending leftward from the lower end of the substrate portion 11b (rightward in the case of the right fixed contact 11), and a flat plate-like fixed contact side electric wire holding portion 11d rising upward from the seat plate portion 11c, It has. The stationary contact 11 is formed by punching and bending a metal plate.

そして、左側の固定接触子１１は、図４、図７及び図８に示すように、固定接点部１１ａが接点機構収容凹部２１内に位置し、基板部１１ｂ、座板部１１ｃ及び固定接触子側電線保持部１１ｄが左側の電線挿入空間２２内に位置するように、ケース本体２ａに固定される。また、右側の固定接触子１１は、固定接点部１１ａが接点機構収容凹部２１内に位置し、基板部１１ｂ、座板部１１ｃ及び固定接触子側電線保持部１１ｄが右側の電線挿入空間２２内に位置するように、ケース本体２ａに固定される。   As shown in FIGS. 4, 7, and 8, the fixed contact 11 on the left side has the fixed contact portion 11 a located in the contact mechanism accommodating recess 21, and the substrate portion 11 b, the seat plate portion 11 c, and the fixed contact piece. The side electric wire holding part 11d is fixed to the case main body 2a so as to be positioned in the electric wire insertion space 22 on the left side. The fixed contact 11 on the right side has the fixed contact portion 11a located in the contact mechanism accommodating recess 21 and the substrate portion 11b, the seat plate portion 11c, and the fixed contact side electric wire holding portion 11d in the right electric wire insertion space 22. It is fixed to the case main body 2a so as to be located at

また、対をなす左側及び右側の電線保持用弾性部材３１は線対称形状となっているため、左側の電線保持用弾性部材３１の構成のみについて説明する。左側の電線保持用弾性部材３１は、図５乃至図８に示すように、左側の固定接触子１１に接続されるとともに左側の電線挿入空間２２内に配置され、左側の電線挿入口２３から電線挿入空間２２内に電線挿入方向（矢印Ｆで示す下方向）に挿入される電線Ｗの芯線Ｗ１を弾性保持するものである。具体的に述べると、左側の電線保持用弾性部材３１は、左側の固定接触子１１の基板部１１ｂに溶接によって接続された平板状の接続部３１ａと、接続部３１ａから電線挿入方向と反対方向（矢印Ｅで示す上方向）側に凸となる湾曲部３１ｂと、湾曲部３１ｂの先端から左右方向外方に向けて斜め下方に延びる弾性部材側電線保持部３１ｃとを備えた板ばね部材である。そして、湾曲部３１ｂ及び弾性部材側電線保持部３１ｃの幅方向中央部には、湾曲部３１ｂから弾性部材側電線保持部３１ｃの先端にかけて延びるスリット３１ｄが形成され、このスリット３１ｄによって、湾曲部３１ｂが第１湾曲部３１ｂａと第２湾曲部３１ｂｂとに２分割され、弾性部材側電線保持部３１ｃが第１弾性部材側電線保持部３１ｃａと第２弾性部材側電線保持部３１ｃｂとに２分割されている。第１弾性部材側電線保持部３１ｃａは、左側の２つの電線挿入口２３のうち一方の電線挿入口２３に対応し、第２弾性部材側電線保持部３１ｃｂは、他方の電線挿入口２３に対応する位置に設けられる。   Since the paired left and right wire holding elastic members 31 have a line-symmetric shape, only the configuration of the left wire holding elastic member 31 will be described. As shown in FIGS. 5 to 8, the left wire holding elastic member 31 is connected to the left stationary contact 11 and is disposed in the left wire insertion space 22. The core wire W1 of the electric wire W inserted in the insertion space 22 in the electric wire insertion direction (downward direction indicated by the arrow F) is elastically held. Specifically, the left-side elastic member 31 for holding the electric wire includes a plate-like connection portion 31a connected to the base plate portion 11b of the left fixed contact 11 by welding, and a direction opposite to the electric wire insertion direction from the connection portion 31a. (Upward direction indicated by arrow E) A leaf spring member provided with a curved portion 31b that protrudes to the side, and an elastic member-side electric wire holding portion 31c that extends obliquely downward from the tip of the curved portion 31b toward the outer side in the left-right direction. is there. A slit 31d extending from the bending portion 31b to the tip of the elastic member side electric wire holding portion 31c is formed at the center in the width direction of the bending portion 31b and the elastic member side electric wire holding portion 31c. Is divided into two parts, a first bending part 31ba and a second bending part 31bb, and the elastic member side electric wire holding part 31c is divided into two parts: a first elastic member side electric wire holding part 31ca and a second elastic member side electric wire holding part 31cb. ing. The first elastic member side electric wire holding portion 31ca corresponds to one electric wire insertion port 23 of the two left electric wire insertion ports 23, and the second elastic member side electric wire holding portion 31cb corresponds to the other electric wire insertion port 23. It is provided in the position to do.

そして、弾性部材側電線保持部３１ｃの先端である第１弾性部材側電線保持部３１ｃａの先端と、固定接触子側電線保持部１１ｄとの間で、左側の一方の電線挿入口２３から電線挿入空間２２内に挿入される電線Ｗの芯線Ｗ１を弾性保持するようになっている。また、第２弾性部材側電線保持部３１ｃｂの先端と、固定接触子側電線保持部１１ｄとの間で、左側の他方の電線挿入口２３から電線挿入空間２２内に挿入される電線Ｗの芯線Ｗ１を弾性保持するようになっている。   Then, between the tip of the first elastic member side electric wire holding portion 31ca that is the tip of the elastic member side electric wire holding portion 31c and the fixed contact side electric wire holding portion 11d, the electric wire is inserted from the one electric wire insertion port 23 on the left side. The core wire W1 of the electric wire W inserted into the space 22 is elastically held. Moreover, the core wire of the electric wire W inserted in the electric wire insertion space 22 from the other electric wire insertion port 23 of the left side between the front-end | tip of the 2nd elastic member side electric wire holding part 31cb and the stationary contact side electric wire holding part 11d. W1 is elastically held.

右側の電線保持用弾性部材３１は、右側の固定接触子１１に接続されるとともに図４に示すように右側の電線挿入空間２２内に配置され、右側の電線挿入口２３から電線挿入空間２２内に電線挿入方向（矢印Ｆで示す下方向）に挿入される電線Ｗの芯線Ｗ１を弾性保持する。
また、対をなす左側及び右側の表示部材３２は、線対称形状となっているため、左側の表示部材３２の構成のみを説明する。左側の表示部材３２は、電線挿入方向（矢印Ｆで示す下方向）及びその反対方向（矢印Ｅで示す上方向）に移動自在に左側の電線挿入空間２２内に配置される。具体的に述べると、表示部材３２は、図５乃至図８に示すように、略Ｌ字形に形成され、電線挿入空間２２内に挿入される電線Ｗの芯線Ｗ１が当接する平板状の電線当接部３２ａと、電線当接部３２ａの左右方向内方の端部から反対方向（矢印Ｅで示す上方向）に延び、表示部用開口部２４に挿通される細長い板状の表示部３２ｂとを有している。そして、この表示部３２ｂは、電線Ｗの不挿入時には表示部用開口部２４から突出し、電線Ｗの挿入完了時にケース２を構成するケース蓋体２ｂの外面（上面）と面一になる。表示部材３２は、電線当接部３２ａが復帰用弾性部材としての後述する圧縮コイルばね３４上に載置され、表示部３２ｂが、電線保持用弾性部材３１の幅方向（矢印Ａ及びＢで示す前後方向）の中央部に形成された貫通孔３１ｅを通過してケース蓋体２ｂに形成された表示部用開口部２４に支持される。 The right wire holding elastic member 31 is connected to the right fixed contact 11 and is disposed in the right wire insertion space 22 as shown in FIG. 4, and is inserted into the wire insertion space 22 from the right wire insertion port 23. The core wire W1 of the electric wire W inserted in the electric wire insertion direction (downward direction indicated by the arrow F) is elastically held.
Further, since the paired left and right display members 32 have a line-symmetric shape, only the configuration of the left display member 32 will be described. The left display member 32 is disposed in the left wire insertion space 22 so as to be movable in the wire insertion direction (downward direction indicated by arrow F) and in the opposite direction (upward direction indicated by arrow E). More specifically, the display member 32 is formed in a substantially L shape as shown in FIGS. 5 to 8, and is a flat electric wire contact with which the core wire W <b> 1 of the electric wire W inserted into the electric wire insertion space 22 abuts. A contact portion 32a, and an elongated plate-like display portion 32b extending in the opposite direction (upward direction indicated by arrow E) from the inner end of the wire contact portion 32a in the left-right direction and inserted through the display portion opening 24; have. The display portion 32b protrudes from the display portion opening 24 when the electric wire W is not inserted, and is flush with the outer surface (upper surface) of the case lid 2b constituting the case 2 when the insertion of the electric wire W is completed. In the display member 32, the electric wire contact portion 32 a is placed on a compression coil spring 34, which will be described later, as a return elastic member, and the display portion 32 b is shown in the width direction of the electric wire holding elastic member 31 (indicated by arrows A and B). It passes through a through-hole 31e formed in the center portion in the front-rear direction) and is supported by the display-portion opening 24 formed in the case lid 2b.

右側の示部材３２は、電線挿入方向（矢印Ｆで示す下方向）及びその反対方向（矢印Ｅで示す上方向）に移動自在に右側の電線挿入空間２２内に配置される。
また、左側及び右側のストッパー３３は、図５乃至図８（図５乃至図８には左側のストパーのみ図示）に示すように、左側及び右側のそれぞれの電線挿入空間２２内に設けられ、電線Ｗの挿入完了時に表示部材３２の電線当接部３２ａが当接して、表示部材３２の電線挿入方向（矢印Ｆで示す下方向）への移動を規制するものであり、ケース本体２ａから電線挿入空間２２内に突出する円筒型部材である。ストッパー３３は、ケース本体２ａから上方向に延び、固定接触子１１の座板部１１ｃに形成された貫通孔１１ｅを通過して電線挿入空間２２内に突出する。 The right indicating member 32 is disposed in the right electric wire insertion space 22 so as to be movable in the electric wire insertion direction (downward direction indicated by arrow F) and in the opposite direction (upward direction indicated by arrow E).
The left and right stoppers 33 are provided in the left and right wire insertion spaces 22 as shown in FIGS. 5 to 8 (only the left stopper is shown in FIGS. 5 to 8). When the insertion of W is completed, the electric wire abutting portion 32a of the display member 32 comes into contact to restrict the movement of the display member 32 in the electric wire insertion direction (downward direction indicated by arrow F). This is a cylindrical member protruding into the space 22. The stopper 33 extends upward from the case body 2 a, passes through the through hole 11 e formed in the seat plate portion 11 c of the fixed contact 11, and protrudes into the electric wire insertion space 22.

そして、左側及び右側の復帰用弾性部材としての圧縮コイルばね３４は、図５及び図６（図５及び図６には左側の圧縮コイルばねのみ図示）に示すように、ストッパー３３を構成する円筒型部材内に配置され、表示部材３２を電線当接部３２ａを介して、常時、電線挿入方向（矢印Ｆで示す下方向）と反対方向（矢印Ｅで示す上方向）に付勢するようになっている。   The compression coil spring 34 as the left and right return elastic members is a cylinder constituting the stopper 33 as shown in FIGS. 5 and 6 (only the left compression coil spring is shown in FIGS. 5 and 6). It arrange | positions in a type | mold member, and always urges the display member 32 through the electric wire contact part 32a to the opposite direction (upward direction shown by the arrow E) to the electric wire insertion direction (downward direction shown by the arrow F). It has become.

このように構成された電線接続構造において、電線Ｗを端子金具としての左側の固定接触子１１に接続する方法について、図１、図２、図７及び図８を参照して説明する。電線Ｗを右側の固定接触子１１に接続する方法は、左側の固定接触子１１に接続する方法と同様であるためその説明は省略する。
先ず、電線Ｗを固定接触子１１に接続する際に、図８に示すように、絶縁被覆Ｗ２の先端部分を除去し、芯線Ｗ１を電線Ｗの先端から所定長さだけ露出する。この際に、多数の金属線材からなる芯線Ｗ１がばらばらにならないように、露出した芯線Ｗ１の周囲には絶縁フェルールＷ３を取り付ける。 In the wire connection structure configured as described above, a method of connecting the wire W to the left fixed contact 11 as a terminal fitting will be described with reference to FIGS. 1, 2, 7, and 8. Since the method of connecting the electric wire W to the right fixed contact 11 is the same as the method of connecting the left fixed contact 11, the description thereof is omitted.
First, when connecting the electric wire W to the fixed contact 11, the tip portion of the insulating coating W2 is removed, and the core wire W1 is exposed from the tip of the electric wire W by a predetermined length, as shown in FIG. At this time, an insulating ferrule W3 is attached around the exposed core wire W1 so that the core wire W1 made of a large number of metal wires does not fall apart.

ここで、電線Ｗを左側の固定接触子１１に接続する前には、図１及び図７に示すように、表示部材３２の表示部３２ｂは、ケース蓋体２ｂの外面（上面）から所定量だけ突出している。
そして、電線Ｗの芯線Ｗ１を、左側の各電線挿入空間２２に対応する２つの電線挿入口２３のうち１つの電線挿入口２３（図２及び図８にあっては、他方側の電線挿入口２３）から電線挿入方向（矢印Ｆで示す下方向）に各電線挿入空間２２内に挿入する。すると、電線Ｗの芯線Ｗ１は、弾性部材側電線保持部３１ｃの先端である第１弾性部材側電線保持部３１ｃａあるいは第２弾性部材側電線保持部３１ｃｂの先端（図２及び図８にあっては、第２弾性部材側電線保持部３１ｃｂの先端）を電線挿入方向に変位させる。 Here, before connecting the electric wire W to the left stationary contact 11, as shown in FIGS. 1 and 7, the display portion 32b of the display member 32 is a predetermined amount from the outer surface (upper surface) of the case lid 2b. Only protruding.
The core wire W1 of the electric wire W is connected to one electric wire insertion port 23 (in FIG. 2 and FIG. 8, the other electric wire insertion port) out of the two electric wire insertion ports 23 corresponding to the respective electric wire insertion spaces 22 on the left side. 23) to each wire insertion space 22 in the wire insertion direction (downward direction indicated by arrow F). Then, the core wire W1 of the electric wire W is the tip of the first elastic member side electric wire holding portion 31ca or the second elastic member side electric wire holding portion 31cb which is the tip of the elastic member side electric wire holding portion 31c (in FIGS. 2 and 8). Displace the tip of the second elastic member side electric wire holding portion 31cb) in the electric wire insertion direction.

この電線Ｗの挿入初期状態にあっては、左側の表示部材３２の表示部３２ｂは、未だ図１及び図７に示す場合と同様に、ケース蓋体２ｂの外面（上面）から所定量だけ突出している。
そして、電線Ｗの芯線Ｗ１の挿入を進行させると、電線Ｗの芯線Ｗ１は、弾性部材側電線保持部３１ｃの先端である第１弾性部材側電線保持部３１ｃａあるいは第２弾性部材側電線保持部３１ｃｂの先端（図２及び図８にあっては、第２弾性部材側電線保持部３１ｃｂの先端）と固定接触子側電線保持部１１ｄの内面との間に入り込んで弾性保持されるとともに、表示部材３２の電線当接部３３に当接する。 In the initial insertion state of the electric wire W, the display portion 32b of the left display member 32 still projects a predetermined amount from the outer surface (upper surface) of the case lid 2b, as in the case shown in FIGS. ing.
And if insertion of the core wire W1 of the electric wire W is advanced, the core wire W1 of the electric wire W will be the 1st elastic member side electric wire holding part 31ca which is the front-end | tip of the elastic member side electric wire holding part 31c, or the 2nd elastic member side electric wire holding part. In between the tip of 31cb (in FIG. 2 and FIG. 8, the tip of the second elastic member side electric wire holding portion 31cb) and the inner surface of the fixed contact side electric wire holding portion 11d, the elastic holding is performed. It abuts on the wire abutting portion 33 of the member 32.

この電線Ｗの挿入中期状態にあっても、左側の表示部材３２の表示部３２ｂは、未だ図１及び図７に示す場合と同様に、ケース蓋体２ｂの外面（上面）から所定量だけ突出している。
そして、電線Ｗの芯線Ｗ１の挿入を更に進行させると、電線Ｗの芯線Ｗ１は圧縮コイルばね３４の付勢力に抗して表示部材３２の電線当接部３３を電線挿入方向（矢印Ｆで示す下方向）に押し込んで、表示部材３２が電線挿入方向へ移動し、表示部３２ｂのケース蓋体２ｂの外面からの突出量が電線挿入量（芯線Ｗ１が電線当接部３３に当接してからの電線Ｗの挿入量）に比例して減少する。 Even in the middle insertion state of the electric wire W, the display portion 32b of the left display member 32 still protrudes from the outer surface (upper surface) of the case lid 2b by a predetermined amount, as in the case shown in FIGS. ing.
When the insertion of the core wire W1 of the electric wire W is further advanced, the core wire W1 of the electric wire W resists the urging force of the compression coil spring 34 and the electric wire abutting portion 33 of the display member 32 is shown in the electric wire insertion direction (indicated by an arrow F). The display member 32 moves in the electric wire insertion direction by pushing downward, and the amount of protrusion of the display portion 32b from the outer surface of the case lid 2b is the electric wire insertion amount (the core wire W1 contacts the electric wire contact portion 33). Of the electric wire W) decreases in proportion.

更に、電線Ｗの芯線Ｗ１の挿入を進行させて電線Ｗの挿入完了状態になると、図２及び図８に示すように、電線Ｗの芯線Ｗ１の移動によって電線当接部３３が電線ストッパー３３に当接し、表示部材３２の電線挿入方向への移動が規制される。この電線Ｗの挿入完了状態では、表示部材３２の表示部３２ｂは、ケース蓋体２ｂの外面と面一になる。
そして、この電線Ｗの挿入完了状態では、電線Ｗの芯線Ｗ１は、既に、弾性部材側電線保持部３１ｃの先端である第１弾性部材側電線保持部３１ｃａあるいは第２弾性部材側電線保持部３１ｃｂの先端（図２及び図８にあっては、第２弾性部材側電線保持部３１ｃｂの先端）と固定接触子側電線保持部１１ｄの内面との間に入り込んで弾性保持されているため、電線Ｗと固定接触子１１とが電気的に接続されている。ここで、電線Ｗは、圧縮コイルばね３４の付勢力によって電線当接部３３を介して電線挿入方向と反対方向（矢印Ｅで示す上方向）へ付勢される力を受ける。しかし、電線Ｗの芯線Ｗ１と、第１弾性部材側電線保持部３１ｃａあるいは第２弾性部材側電線保持部３１ｃｂの先端及び固定接触子側電線保持部１１ｄの内面との間の摩擦力が、圧縮コイルばね３４の付勢力よりも大きいため、電線Ｗが電線挿入方向と反対方向へ移動することはない。 Further, when the insertion of the core wire W1 of the electric wire W is advanced and the insertion of the electric wire W is completed, as shown in FIGS. 2 and 8, the electric wire contact portion 33 is moved to the electric wire stopper 33 by the movement of the core wire W1 of the electric wire W. It abuts and the movement of the display member 32 in the electric wire insertion direction is restricted. In the insertion completion state of the electric wire W, the display portion 32b of the display member 32 is flush with the outer surface of the case lid 2b.
And in the insertion completion state of this electric wire W, the core wire W1 of the electric wire W is already the 1st elastic member side electric wire holding part 31ca which is the front-end | tip of the elastic member side electric wire holding part 31c, or the 2nd elastic member side electric wire holding part 31cb. 2 (in FIG. 2 and FIG. 8, the tip of the second elastic member side electric wire holding portion 31cb) and the inner surface of the fixed contact side electric wire holding portion 11d are elastically held so that the electric wire W and the fixed contact 11 are electrically connected. Here, the electric wire W receives a force urged in the direction opposite to the electric wire insertion direction (upward direction indicated by the arrow E) via the electric wire contact portion 33 by the urging force of the compression coil spring 34. However, the frictional force between the core W1 of the electric wire W and the tip of the first elastic member side electric wire holding portion 31ca or the second elastic member side electric wire holding portion 31cb and the inner surface of the fixed contact side electric wire holding portion 11d is compressed. Since it is larger than the biasing force of the coil spring 34, the electric wire W does not move in the direction opposite to the electric wire insertion direction.

このように本実施形態に係る電線接続構造にあっては、表示部材３２の表示部３２ｂは、電線Ｗの不挿入時にはケース蓋体２ｂに形成された表示部用開口部２４から突出し、電線Ｗの挿入完了時にケース蓋体２ｂの外面（上面）と面一になるので、電線Ｗを挿入する初期状態から挿入完了までの間、電線Ｗの挿入状態を把握できる。このため、電線Ｗの挿入量が多すぎたり、あるいは電線Ｗの挿入量が足りずに不完全挿入となってしまうことを防止することができる。   Thus, in the electric wire connection structure according to the present embodiment, the display portion 32b of the display member 32 protrudes from the display portion opening 24 formed in the case lid 2b when the electric wire W is not inserted, and the electric wire W Since it becomes flush with the outer surface (upper surface) of the case lid 2b when the insertion of the wire W is completed, the insertion state of the wire W can be grasped from the initial state where the wire W is inserted until the insertion is completed. For this reason, it can prevent that the insertion amount of the electric wire W is too much, or the insertion amount of the electric wire W is not enough and it becomes incomplete insertion.

そして、表示部材３２の表示部３２ｂがケース蓋体２ｂの外面と面一になるまで電線Ｗの挿入が完了したと認識されないため、電線Ｗが不完全挿入の状態で電線Ｗの挿入が完了したと認識される蓋然性は低い。
また、表示部材３２の表示部３２ｂは、電線挿入方向に移動するようになっているため、電線Ｗを挿入する初期状態から挿入完了まで電線挿入量を把握するために、表示部３２ｂが挿通される表示部用開口部２４の大きさを大きくする必要はない。このため、表示部用開口部２４の面積を大きくする必要はなく、表示部用開口部２４の開口面積を大きくすることによって表示部用開口部２４から異物が混入してしまうおそれを回避することができる。 And since it is not recognized that insertion of the electric wire W was completed until the display part 32b of the display member 32 became flush with the outer surface of the case lid 2b, the insertion of the electric wire W was completed with the electric wire W incompletely inserted. The probability of being recognized is low.
Moreover, since the display part 32b of the display member 32 moves in the electric wire insertion direction, the display part 32b is inserted in order to grasp the amount of electric wire insertion from the initial state of inserting the electric wire W to the completion of insertion. It is not necessary to increase the size of the display portion opening 24. For this reason, it is not necessary to increase the area of the display portion opening 24, and avoiding the possibility that foreign matter is mixed from the display portion opening 24 by increasing the opening area of the display portion opening 24. Can do.

また、ストッパー３３は、ケース本体２ａから電線挿入空間２２内に突出する円筒型部材であり、復帰用弾性部材は、ストッパー３３を構成する円筒型部材内に配置され、円筒型部材に支持される圧縮コイルばね３４で構成される。このため、ストッパー３３及び復帰用弾性部材の構成を簡単な構成で実現できるととともに、ストッパー３３に表示部材３２の移動規制機能と復帰用弾性支持部材の収容機能とを持たせることができる。   The stopper 33 is a cylindrical member protruding from the case main body 2a into the electric wire insertion space 22, and the return elastic member is disposed in the cylindrical member constituting the stopper 33 and supported by the cylindrical member. A compression coil spring 34 is used. Therefore, the stopper 33 and the return elastic member can be realized with a simple structure, and the stopper 33 can have a function of restricting the movement of the display member 32 and a function of accommodating the return elastic support member.

また、表示部材３２は、電線当接部３２ａが圧縮コイルばね３４上に載置され、表示部３２ｂが表示部用開口部２４に支持されるので、表示部材３２を簡単な構造で電線挿入方向及びその反対方向に移動自在に電線挿入空間２２内に配置することができる。
更に、電線保持用弾性部材３１は、固定接触子１１に接続された接続部３１ａと、接続部３１ａから電線挿入方向と反対方向側に凸となる湾曲部３１ｂと、湾曲部３１ｂの先端から延びる弾性部材側電線保持部３１ｃとを備えた板ばね部材であり、弾性部材側電線保持部３１ｃの先端と固定接触子側電線保持部１１ｄとの間で電線Ｗの芯線Ｗ１を弾性保持する。このため、十分なばね性を有する板ばね部材の弾性力を利用して電線Ｗの芯線Ｗ１を弾性保持することができ、電線Ｗの芯線Ｗ１と固定接触子１１とを確実に電気的に接続することができる。 In addition, since the display member 32 has the electric wire contact portion 32a mounted on the compression coil spring 34 and the display portion 32b supported by the display portion opening 24, the display member 32 has a simple structure and the electric wire insertion direction. And it can arrange | position in the electric wire insertion space 22 movably in the opposite direction.
Further, the elastic member 31 for holding the electric wire extends from the connecting portion 31a connected to the stationary contact 11, the curved portion 31b protruding from the connecting portion 31a in the direction opposite to the electric wire insertion direction, and the tip of the curved portion 31b. It is a leaf spring member provided with the elastic member side electric wire holding portion 31c, and elastically holds the core wire W1 of the electric wire W between the tip of the elastic member side electric wire holding portion 31c and the fixed contact side electric wire holding portion 11d. For this reason, the core wire W1 of the electric wire W can be elastically held by utilizing the elastic force of the leaf spring member having sufficient spring properties, and the core wire W1 of the electric wire W and the fixed contact 11 are reliably electrically connected. can do.

以上、本発明の実施形態について説明してきたが、本発明はこれに限定されずに種々の変更、改良を行うことができる。
例えば、電線接続構造が適用される電気機器は、図１及び図２に示す電磁接触器１のみならず、回路遮断器や安全ブレーカーなど電線を差し込んで接続できる電気機器であれば適用できる。 As mentioned above, although embodiment of this invention has been described, this invention is not limited to this, A various change and improvement can be performed.
For example, the electric device to which the electric wire connection structure is applied is applicable not only to the electromagnetic contactor 1 shown in FIGS. 1 and 2 but also to an electric device that can be connected by inserting an electric wire such as a circuit breaker or a safety breaker.

そして、電線Ｗが接続される端子金具は、電磁接触器１に設けられた固定接触子１１のみならず、別個の電気機器に設けられた金属製のコンタクトであってもよい。
また、復帰用弾性部材としては、表示部材３２を電線挿入方向と反対方向（矢印Ｅで示す上方向）に付勢するものであれば、圧縮コイルばね３４以外の弾性部材、例えば引張ばねであってもよい。
また、ストッパー３３は、電線Ｗの挿入完了時に表示部材３２の電線当接部３２ａが当接して、表示部材３２の電線挿入方向（矢印Ｆで示す下方向）への移動を規制するものであれば、ケース本体２ａから突出する円筒型部材以外であってもよい。 And the terminal metal fitting to which the electric wire W is connected may be not only the fixed contact 11 provided in the electromagnetic contactor 1 but also a metal contact provided in a separate electric device.
The return elastic member is an elastic member other than the compression coil spring 34, for example, a tension spring, as long as it urges the display member 32 in the direction opposite to the electric wire insertion direction (upward direction indicated by arrow E). May be.
Further, the stopper 33 is configured to restrict the movement of the display member 32 in the electric wire insertion direction (downward direction indicated by the arrow F) when the electric wire contact portion 32a of the display member 32 comes into contact when the insertion of the electric wire W is completed. For example, it may be other than the cylindrical member protruding from the case main body 2a.

１ 電磁接触器（電気機器）
２ ケース
２ａ ケース本体
２ｂ ケース蓋体
１０ 接点機構
１１ 固定接触子（端子金具）
１１ａ 固定接点部
１１ｂ 基板部
１１ｃ 座板部
１１ｄ 固定接触子側電線保持部
１１ｅ 貫通孔
１２ 可動接触子
１３ 可動接触子支持部材
２１ 接点機構収容凹部
２２ 電線挿入空間
２２ａ 隔壁
２３ 電線挿入口
２４ 表示部用開口部
３１ 電線保持用弾性部材
３１ａ 接続部
３１ｂ 湾曲部
３１ｂａ 第１湾曲部
３１ｂｂ 第２湾曲部
３１ｃ 弾性部材側電線保持部
３１ｃａ 第１弾性部材側電線保持部
３１ｃｂ 第２弾性部材側電線保持部
３１ｄ スリット
３１ｅ 貫通孔
３２ 表示部材
３２ａ 電線当接部
３２ｂ 表示部
３３ ストッパー
３４ 圧縮コイルばね（復帰用弾性部材）
Ｗ 電線
Ｗ１ 芯線
Ｗ２ 絶縁被覆
Ｗ３ 絶縁フェルール 1 Magnetic contactor (electric equipment)
2 Case 2a Case body 2b Case lid 10 Contact mechanism 11 Fixed contact (terminal fitting)
11a Fixed contact part 11b Substrate part 11c Seat plate part 11d Fixed contact side electric wire holding part 11e Through-hole 12 Movable contact 13 Movable contact support member 21 Contact mechanism accommodation recessed part 22 Electric wire insertion space 22a Bulkhead 23 Electric wire insertion port 24 Display part Opening portion 31 Electric wire holding elastic member 31a Connection portion 31b Bending portion 31ba First bending portion 31bb Second bending portion 31c Elastic member side electric wire holding portion 31ca First elastic member side electric wire holding portion 31cb Second elastic member side electric wire holding portion 31d Slit 31e Through-hole 32 Display member 32a Electric wire contact part 32b Display part 33 Stopper 34 Compression coil spring (Resilient elastic member)
W Electric wire W1 Core wire W2 Insulation coating W3 Insulation ferrule

Claims (4)

端子金具を内部に収容するとともに、内部に電線挿入空間を形成し、外面と前記電線挿入空間とを連通するように形成された電線挿入口及び表示部用開口部を有するケースと、
前記端子金具に接続されるとともに前記電線挿入空間内に配置された、前記電線挿入口から前記電線挿入空間内に電線挿入方向に挿入される電線の芯線を弾性保持する電線保持用弾性部材と、
前記電線挿入方向及びその反対方向に移動自在に前記電線挿入空間内に配置され、前記電線の芯線が当接する電線当接部と、該電線当接部から前記反対方向に延び、前記表示部用開口部に挿通される表示部とを有し、該表示部が、前記電線の不挿入時に前記表示部用開口部から突出し、前記電線の挿入完了時に前記ケースの外面と面一になる表示部材と、
前記電線挿入空間内に設けられ、前記電線の挿入完了時に前記表示部材の前記電線当接部が当接して、前記表示部材の前記電線挿入方向への移動を規制するストッパーと、
前記電線挿入空間内に配置され、前記表示部材を前記電線挿入方向と反対方向に付勢する復帰用弾性部材とを備えていることを特徴とする電気機器における電線接続構造。 A case having an electric wire insertion opening and a display portion opening formed so as to accommodate the terminal fitting therein, form an electric wire insertion space therein, and communicate the outer surface with the electric wire insertion space;
An elastic member for holding a wire that is connected to the terminal fitting and is elastically held in the wire insertion space and elastically holds the core wire of the wire inserted in the wire insertion direction from the wire insertion port into the wire insertion space;
An electric wire abutting portion that is arranged in the electric wire insertion space so as to be movable in the electric wire insertion direction and the opposite direction, and that extends in the opposite direction from the electric wire abutting portion, and for the display unit And a display member that protrudes from the display opening when the electric wire is not inserted and is flush with the outer surface of the case when the electric wire is completely inserted. When,
A stopper that is provided in the electric wire insertion space, contacts the electric wire contact portion of the display member when insertion of the electric wire is completed, and restricts movement of the display member in the electric wire insertion direction;
An electric wire connection structure in an electric device, comprising: a return elastic member disposed in the electric wire insertion space and biasing the display member in a direction opposite to the electric wire insertion direction. 前記ストッパーは、前記ケースから前記電線挿入空間内に突出する円筒型部材であり、前記復帰用弾性部材は、前記ストッパーを構成する円筒型部材内に収容され、前記円筒型部材に支持される圧縮コイルばねで構成されることを特徴とする請求項１に記載の電気機器における電線接続構造。   The stopper is a cylindrical member protruding from the case into the electric wire insertion space, and the return elastic member is accommodated in a cylindrical member constituting the stopper and is compressed by the cylindrical member. It is comprised with a coil spring, The electric wire connection structure in the electric equipment of Claim 1 characterized by the above-mentioned. 前記表示部材は、前記電線当接部が前記圧縮コイルばね上に載置され、前記表示部が前記表示部開口部に支持されることを特徴とする請求項２に記載の電気機器における電線接続構造。   The electric wire connection in the electric device according to claim 2, wherein the display member has the electric wire contact portion placed on the compression coil spring, and the display portion is supported by the display portion opening. Construction. 前記電線保持用弾性部材は、前記端子金具に接続された接続部と、該接続部から前記電線挿入方向と反対方向側に凸となる湾曲部と、該湾曲部の先端から延びる弾性部材側電線保持部とを備えた板ばね部材であり、前記弾性部材側電線保持部の先端と前記端子金具に設けられた固定接触子側電線保持部との間で前記電線の芯線を弾性保持することを特徴とする請求項１乃至３のうちいずれか一項に記載の電気機器における電線接続構造。   The elastic member for holding an electric wire includes a connecting portion connected to the terminal fitting, a curved portion protruding from the connecting portion in a direction opposite to the electric wire insertion direction, and an elastic member side electric wire extending from a tip of the bending portion. A leaf spring member having a holding portion, and elastically holding the core wire of the electric wire between a tip of the elastic member side electric wire holding portion and a stationary contact side electric wire holding portion provided on the terminal fitting. The electric wire connection structure in the electric device according to claim 1, wherein the electric wire connection structure is an electric device.

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