JP2023061416A

JP2023061416A - Terminal and wire including the same

Info

Publication number: JP2023061416A
Application number: JP2021171278A
Authority: JP
Inventors: 伸也松浦; Shinya Matsuura
Original assignee: Yazaki Corp
Current assignee: Yazaki Corp
Priority date: 2021-10-20
Filing date: 2021-10-20
Publication date: 2023-05-02

Abstract

To provide a terminal and a wire including the same capable of ensuring proper conduction performance.SOLUTION: A terminal 20 integrally includes an electrical connecting portion 21 formed on one end in an axial direction X and capable of connecting to a connecting member, a wire crimping portion 22 formed in a hollow cylindrical shape on the other end in the axial direction X and capable of crimping a core wire 11 of a wire 10 inserted inside, and a connecting portion 23 formed in a solid shape integrally with the electrical connecting portion 21 and the wire crimping portion 22 between the electrical connecting portion 21 and the wire crimping portion 22 in the axial direction X for connecting the electrical connecting portion 21 and the wire crimping portion 22. The wire crimping portion 22 has a notch 30 partially notched along a circumferential direction in a hollow cylindrical body 22A.SELECTED DRAWING: Figure 1

Description

本発明は、端子および端子付き電線に関する。 TECHNICAL FIELD The present invention relates to a terminal and an electric wire with a terminal.

例えば、電気自動車用の大電流回路で使用される端子付き電線は、大電流容量に耐え得る必要がある。このため、この種の端子付き電線に用いられる端子は、大電流容量に適合可能な構造とすることが求められる。特許文献１には、大電流容量を実現するために、丸棒状の中実導電材からそれぞれ中空筒状の端子接続部と電線圧着部とを削り出して製造された端子（クローズドバレル端子）が提案されている（例えば、特許文献１参照）。 For example, electric wires with terminals used in high current circuits for electric vehicles need to be able to withstand high current capacity. For this reason, terminals used in this type of electric wire with terminals are required to have a structure that can be adapted to a large current capacity. In Patent Document 1, in order to realize a large current capacity, a terminal (closed barrel terminal) is manufactured by cutting out a hollow cylindrical terminal connecting portion and a wire crimping portion from a round rod-shaped solid conductive material. It has been proposed (see Patent Document 1, for example).

特開平０８－３１４８８号公報JP-A-08-31488

ところで、この種の大電流回路で使用する端子は、例えば、電線圧着部の発熱を低減するために、電線圧着部において低接触抵抗が必要となる等、適正な導通性能確保の点で更なる改善の余地がある。 By the way, terminals used in this type of high-current circuit require low contact resistance at the wire crimping part in order to reduce the heat generation of the wire crimping part, for example. There is room for improvement.

本発明は、上記に鑑みてなされたものであって、適正に導通性能を確保することができる端子および端子付き電線を提供することを目的とする。 SUMMARY OF THE INVENTION It is an object of the present invention to provide a terminal and an electric wire with a terminal that can properly ensure conduction performance.

上述した課題を解決し、目的を達成するために、本発明に係る端子は、軸線方向の一端に形成されて接続相手部材と接続可能な電気接続部と、前記軸線方向の他端に中空筒状に形成されて内部に挿入された電線の芯線を圧着可能な電線圧着部と、前記軸線方向における前記電気接続部と前記電線圧着部との間に当該電気接続部および当該電線圧着部と一体で中実状に形成されて、前記電気接続部と前記電線圧着部とを繋ぐ繋ぎ部と、を一体に備え、前記電線圧着部は、前記中空筒状の筒体を周方向に沿って部分的に切欠いた切欠部を有する。 In order to solve the above-described problems and achieve the object, a terminal according to the present invention is provided with an electrical connection portion formed at one end in the axial direction and connectable to a connection mating member, and a hollow cylinder formed at the other end in the axial direction. a wire crimping portion formed into a shape and capable of crimping a core wire of an electric wire inserted therein; and integrally formed with a connection portion that connects the electrical connection portion and the electric wire crimping portion, the electric wire crimping portion partially extending along the circumferential direction of the hollow tubular body. It has a notch notched in the

また、本発明に係る端子付き電線は、導電性の芯線を絶縁被覆で被覆してなる電線と、前記電線に圧着された端子と、を備え、前記端子は、軸線方向の一端に形成されて接続相手部材と接続可能な電気接続部と、前記軸線方向の他端に中空筒状に形成されて内部に挿入された前記芯線を圧着可能な電線圧着部と、前記軸線方向における前記電気接続部と前記電線圧着部との間に当該電気接続部および当該電線圧着部と一体で中実状に形成されて、前記電気接続部と前記電線圧着部とを繋ぐ繋ぎ部と、を一体に備え、前記電線圧着部は、前記中空筒状の筒体を周方向に沿って部分的に切欠いた切欠部を有する。 Further, an electric wire with a terminal according to the present invention includes an electric wire formed by covering a conductive core wire with an insulating coating, and a terminal crimped to the electric wire, and the terminal is formed at one end in the axial direction. an electrical connection portion connectable to a mating connection member; a wire crimping portion formed in a hollow cylindrical shape at the other end in the axial direction and capable of crimping the core wire inserted therein; and the electrical connection portion in the axial direction. and the electric wire crimping portion integrally formed in a solid shape with the electric connecting portion and the electric wire crimping portion to connect the electric connecting portion and the electric wire crimping portion, wherein the The electric wire crimping portion has a notch portion obtained by partially notching the hollow tubular body along the circumferential direction.

本発明によれば、切欠部によって電線圧着部に大きな変形を与えることができるため、電線圧着部と電線の芯線とを良好に圧着することができるので、適正に導通性能を確保することができる。 According to the present invention, the wire crimping portion can be deformed greatly by the notch portion, so that the wire crimping portion and the core wire of the wire can be crimped well, so that the conduction performance can be properly secured. .

図１は、実施形態に係る端子付き電線を模式的に示す斜視図である。FIG. 1 is a perspective view schematically showing an electric wire with a terminal according to an embodiment. 図２は、図１の端子のＡ－Ａ断面図である。FIG. 2 is a cross-sectional view of the terminal of FIG. 1 taken along the line AA. 図３は、端子の電線圧着部に設けられた切欠きを示す周方向断面図である。FIG. 3 is a circumferential cross-sectional view showing a notch provided in the wire crimping portion of the terminal. 図４は、圧着前の電線と電線圧着部とを示す周方向断面図である。FIG. 4 is a circumferential cross-sectional view showing the wire before crimping and the wire crimping portion. 図５は、圧着した状態の電線と電線圧着部とを示す周方向断面図である。FIG. 5 is a circumferential cross-sectional view showing an electric wire and an electric wire crimping portion in a crimped state. 図６は、圧着後の電線と電線圧着部とを示す周方向断面図である。FIG. 6 is a circumferential cross-sectional view showing the wire and the wire crimping portion after crimping. 図７は、電線を電線圧着部に圧着した状態の端子の軸方向断面図である。FIG. 7 is an axial cross-sectional view of the terminal in a state where the electric wire is crimped to the electric wire crimping portion. 図８は、参考例に係る端子付き電線の端子を示す斜視図である。FIG. 8 is a perspective view showing a terminal of an electric wire with a terminal according to a reference example. 図９は、図８の端子のＢ－Ｂ断面図である。9 is a cross-sectional view of the terminal of FIG. 8 taken along the line BB. 図１０は、電線を電線圧着部に圧着する前の端子の軸方向断面図である。FIG. 10 is an axial cross-sectional view of the terminal before the electric wire is crimped to the electric wire crimping portion. 図１１は、電線を電線圧着部に圧着した状態の端子の軸方向断面図である。FIG. 11 is an axial cross-sectional view of the terminal in a state in which the electric wire is crimped to the electric wire crimping portion.

以下に、本発明に係る実施形態を図面に基づいて詳細に説明する。なお、この実施形態によりこの発明が限定されるものではない。また、下記実施形態における構成要素には、当業者が置換可能かつ容易なもの、あるいは実質的に同一のものが含まれる。 EMBODIMENT OF THE INVENTION Below, embodiment which concerns on this invention is described in detail based on drawing. In addition, this invention is not limited by this embodiment. In addition, components in the following embodiments include components that can be easily replaced by those skilled in the art, or components that are substantially the same.

［実施形態］
図１は、実施形態に係る端子付き電線を模式的に示す斜視図である。図２は、図１の端子のＡ－Ａ断面図である。図３は、端子の電線圧着部に設けられた切欠きを示す周方向断面図である。 [Embodiment]
FIG. 1 is a perspective view schematically showing an electric wire with a terminal according to an embodiment. FIG. 2 is a cross-sectional view of the terminal of FIG. 1 taken along the line AA. FIG. 3 is a circumferential cross-sectional view showing a notch provided in the wire crimping portion of the terminal.

本実施形態の端子付き電線１は、例えば、電気自動車などのバッテリを充電するための充電用コネクタのような大電流回路で使用されるものである。端子付き電線１は、図１に示すように、電線１０と、この電線１０に圧着された端子２０とを有する。図１では、説明の便宜上、電線１０と端子２０とが分解された斜視図としているが、電線１０と端子２０とは圧着によって連結されている。なお、以下の説明において、端子２０の長手方向を軸線方向Ｘといい、この軸線方向Ｘに沿った軸線を中心とした周り方向を周方向Ｙという。 The terminal-equipped wire 1 of the present embodiment is used, for example, in a large-current circuit such as a charging connector for charging a battery of an electric vehicle. As shown in FIG. 1, the terminal-equipped electric wire 1 has an electric wire 10 and a terminal 20 crimped to the electric wire 10 . Although FIG. 1 shows a perspective view in which the electric wire 10 and the terminal 20 are disassembled for convenience of explanation, the electric wire 10 and the terminal 20 are connected by crimping. In the following description, the longitudinal direction of the terminal 20 is referred to as an axial direction X, and the circumferential direction about the axis along the axial direction X is referred to as a circumferential direction Y.

電線１０は、導電性の芯線１１と、芯線１１を被覆する絶縁被覆１２とを有する。芯線１１は、例えば銅などの金属材料によって形成された導電性を有する複数の金属素線１１ａを束ねて構成される。電線１０は、端部において絶縁被覆１２が除去されて芯線１１が露出し、この露出した芯線１１が端子２０に圧着される。 The electric wire 10 has a conductive core wire 11 and an insulating coating 12 covering the core wire 11 . The core wire 11 is configured by bundling a plurality of conductive metal wires 11a made of a metal material such as copper. The electric wire 10 is stripped of the insulation coating 12 at the end to expose the core wire 11 , and the exposed core wire 11 is crimped to the terminal 20 .

端子２０は、図１および図２に示すように、軸線方向Ｘの一端に中空筒状に形成されて相手方端子などの接続相手部材（不図示）が接続可能な電気接続部２１と、他端に中空筒状に形成されて電線１０（芯線１１）を圧着可能な電線圧着部２２と、を備える。また、端子２０は、軸線方向Ｘにおける電気接続部２１と電線圧着部２２との間に、電気接続部２１と電線圧着部２２とを繋ぐ繋ぎ部２３を備える。この端子２０は、大電流容量に耐え得るために、金属製の中実の丸棒の外周ならびに内部をバイト等の切削工具によって削り出して製造されており、電気接続部２１、電線圧着部２２および繋ぎ部２３は一体に形成されている。 As shown in FIGS. 1 and 2, the terminal 20 has an electrical connection portion 21 which is formed in a hollow cylindrical shape at one end in the axial direction X and which can be connected to a connection counterpart member (not shown) such as a counterpart terminal, and an electrical connection portion 21 at the other end. and an electric wire crimping portion 22 which is formed in a hollow cylindrical shape and can crimp the electric wire 10 (core wire 11). In addition, the terminal 20 includes a connecting portion 23 that connects the electrical connection portion 21 and the wire crimping portion 22 between the electrical connection portion 21 and the wire crimping portion 22 in the axial direction X. As shown in FIG. In order to withstand a large current capacity, the terminal 20 is manufactured by cutting out the outer circumference and the inside of a solid metal round bar with a cutting tool such as a cutting tool. and the connecting portion 23 are integrally formed.

電気接続部２１は円筒形の筒体２１Ａを有し、この筒体２１Ａの内部空間には、例えば、導電性で中空筒状の接触ばね部材（不図示）が装着され、この接触ばね部材に相手方端子が嵌挿されて接続される。 The electrical connection portion 21 has a cylindrical body 21A, and in the inner space of the cylindrical body 21A, for example, a conductive hollow cylindrical contact spring member (not shown) is mounted. The mating terminal is inserted and connected.

また、電線圧着部２２は円筒形の筒体２２Ａを備え、この筒体２２Ａは軸線方向Ｘの繋ぎ部２３側が閉塞した閉塞端面２４を構成し、この閉塞端面２４の軸線方向Ｘの反対側が開口した開口端面２７を構成する。閉塞端面２４は、軸線方向Ｘに沿って徐々に縮径していく円錐形状に凹んだ形状をなしており、筒体２２Ａの内面２５に連なっている。電線圧着部２２の内部空間には開口端面２７を通じて電線１０の芯線１１が挿入される。そして、芯線１１が挿入された状態で筒体２２Ａに外力を作用させて加締めることにより、該筒体２２Ａを変形させて電線１０の芯線１１を圧着する。 The wire crimping portion 22 has a cylindrical body 22A. The cylindrical body 22A forms a closed end face 24 closed on the connecting portion 23 side in the axial direction X, and the closed end face 24 on the opposite side in the axial direction X is open. An open end face 27 is constructed. The closed end surface 24 has a concave conical shape whose diameter gradually decreases along the axial direction X, and continues to the inner surface 25 of the cylindrical body 22A. The core wire 11 of the electric wire 10 is inserted through the opening end face 27 into the inner space of the electric wire crimping portion 22 . By applying an external force to the cylindrical body 22A with the core wire 11 inserted therein and crimping the cylindrical body 22A, the cylindrical body 22A is deformed and the core wire 11 of the electric wire 10 is crimped.

繋ぎ部２３は、軸線方向Ｘにおける電気接続部２１と電線圧着部２２との間に位置し、電気接続部２１の筒体２１Ａの内部空間と、電線圧着部２２の筒体２２Ａの内部空間とを仕切る機能を有する。また、繋ぎ部２３は中実状に形成されることにより、高い剛性を有する。このため、電気接続部２１と電線圧着部２２の各内部空間は、繋ぎ部２３によって隔絶されており、電気接続部２１と電線圧着部２２とはそれぞれ独立している。このように、本実施形態では、繋ぎ部２３を挟んで軸線方向Ｘに電気接続部２１と電線圧着部２２とが独立して配置されることにより、電線圧着部２２の筒体２２Ａの変形が電気接続部２１に与える影響を低減することができる。このため、電線圧着部２２の筒体２２Ａに大きな変形を与えることが可能となる。 The connecting portion 23 is positioned between the electrical connection portion 21 and the wire crimping portion 22 in the axial direction X, and is separated from the inner space of the cylindrical body 21A of the electrical connecting portion 21 and the inner space of the cylindrical body 22A of the wire crimping portion 22. has the function of partitioning Moreover, the connection part 23 has high rigidity by being formed in a solid shape. Therefore, the internal spaces of the electrical connection portion 21 and the wire crimping portion 22 are separated by the connecting portion 23, and the electrical connection portion 21 and the wire crimping portion 22 are independent of each other. As described above, in the present embodiment, the electrical connection portion 21 and the wire crimping portion 22 are arranged independently in the axial direction X with the connecting portion 23 interposed therebetween. The influence on the electrical connection portion 21 can be reduced. For this reason, it becomes possible to give a large deformation to the cylindrical body 22A of the wire crimping portion 22 .

ところで、この種の大電流回路で使用する端子２０は、電線圧着部２２の発熱を低減するために、電線圧着部２２における低接触抵抗が必要となる等、適正な導通性能確保の点で更なる改善の余地がある。特に、この端子２０のように、中空筒状の電線圧着部２２を削り出した構成では、電線圧着部２２の剛性が高いため、電線圧着部２２と電線１０の芯線１１とを良好に圧着することが要望されている。 By the way, the terminal 20 used in this type of large current circuit requires a low contact resistance at the wire crimping portion 22 in order to reduce the heat generation of the wire crimping portion 22. Therefore, it is necessary to ensure appropriate conduction performance. There is room for further improvement. In particular, in the structure in which the hollow tubular wire crimping portion 22 is cut out as in the terminal 20, the wire crimping portion 22 and the core wire 11 of the wire 10 can be crimped well because the rigidity of the wire crimping portion 22 is high. is desired.

本実施形態の端子２０では、電線圧着部２２は、中空筒状の筒体２２Ａの一部を周方向に沿って部分的に切欠いた切欠部３０を有している。この切欠部３０は、電線圧着部２２の筒体２２Ａの剛性を低下させるものである。この切欠部３０を電線圧着部２２の筒体２２Ａに設けることにより、電線圧着部２２の筒体２２Ａに大きな変形を与えることができる。このため、電線圧着部と電線の芯線とを良好に圧着することができるので、適正に導通性能を確保することができる。例えば、切欠部３０により電線圧着部２２の筒体２２Ａの剛性が低下するため、圧着した際に電線圧着部２２と電線１０の芯線１１との接触面積が増加することにより電線圧着部２２の電気抵抗を低減することができる。また、少ない圧着回数で電線圧着部２２と電線１０の芯線１１とを良好に圧着できるため、例えば、１回の圧着作業で必要な芯線１１の圧縮量を得ることができ、圧着作業の回数削減による作業時間の低減を図ることができる。 In the terminal 20 of the present embodiment, the wire crimping portion 22 has a notch portion 30 formed by partially notching a part of the hollow tubular body 22A along the circumferential direction. The cutout portion 30 reduces the rigidity of the cylindrical body 22A of the wire crimping portion 22. As shown in FIG. By providing the notch 30 in the tubular body 22A of the wire crimping portion 22, the tubular body 22A of the wire crimping portion 22 can be largely deformed. Therefore, the electric wire crimping portion and the core wire of the electric wire can be crimped well, so that the conduction performance can be properly secured. For example, since the rigidity of the cylindrical body 22A of the wire crimping portion 22 is reduced by the notch portion 30, the contact area between the wire crimping portion 22 and the core wire 11 of the wire 10 increases when the wire crimping portion 22 is crimped. resistance can be reduced. In addition, since the wire crimping portion 22 and the core wire 11 of the wire 10 can be crimped well with a small number of crimping operations, for example, the required amount of compression of the core wire 11 can be obtained in one crimping operation, and the number of crimping operations can be reduced. It is possible to reduce the working time by

この切欠部３０は、電線圧着部２２の閉塞端面２４側に設けることが好ましく、本実施形態では、切欠部３０は、筒体２２Ａの内面２５と閉塞端面２４との境界部２６の筒体２２Ａの内面２５側に当該境界部２６と隣接して設けられている。ここで、境界部２６と隣接するとは、筒体２２Ａの開口端面２７から境界部２６までの軸線方向Ｘの距離Ｌに対する、切欠部３０から境界部２６までの軸線方向Ｘの距離Ｌ１の割合が、０［％］＜（Ｌ１／Ｌ）≦３０［％］となる範囲に切欠部３０が位置することをいう。この構成では、電線圧着部２２を加締めた際に、筒体２２Ａに大きな変形を与えることができるようになる。このため、端子２０の軸線方向Ｘ（長手方向）の変形量も増加させることができ、電線１０の芯線１１を圧縮している軸線方向Ｘの範囲を長くすることができる。従って、電線圧着部２２と芯線１１との接触面積が増加することにより電線圧着部２２の電気抵抗を低減することができる。 The notch 30 is preferably provided on the closed end surface 24 side of the wire crimping portion 22. In the present embodiment, the notch 30 is located at the boundary 26 between the inner surface 25 of the cylinder 22A and the closed end surface 24 of the cylinder 22A. is provided adjacent to the boundary portion 26 on the inner surface 25 side of the . Here, being adjacent to the boundary portion 26 means that the ratio of the distance L1 in the axial direction X from the notch portion 30 to the boundary portion 26 to the distance L in the axial direction X from the opening end face 27 of the cylindrical body 22A to the boundary portion 26 is , 0[%]<(L1/L)≦30[%]. With this configuration, when the wire crimping portion 22 is crimped, the cylindrical body 22A can be greatly deformed. Therefore, the amount of deformation in the axial direction X (longitudinal direction) of the terminal 20 can be increased, and the range in the axial direction X in which the core wire 11 of the electric wire 10 is compressed can be lengthened. Therefore, the electrical resistance of the wire crimping portion 22 can be reduced by increasing the contact area between the wire crimping portion 22 and the core wire 11 .

また、切欠部３０は、電線圧着部２２を加締めて圧着する際に外力が作用する作用点よりも軸線方向Ｘにおける電線圧着部２２の閉塞端面２４側に形成してもよい。この作用点は、加締める際に、加締用ダイスの端子加締面（後述する）と直接当接して、電線圧着部２２の筒体２２Ａに外力が直接作用する位置である。この構成によっても、電線圧着部２２を加締めた際に、筒体２２Ａに大きな変形を与えることができるようになる。このため、端子２０の軸線方向Ｘ（長手方向）の変形量も増加させることができ、電線１０の芯線１１を圧縮している軸線方向Ｘの範囲を長くすることができる。従って、電線圧着部２２と芯線１１との接触面積が増加することにより電線圧着部２２の電気抵抗を低減することができる。 Further, the notch portion 30 may be formed on the closed end surface 24 side of the wire crimping portion 22 in the axial direction X from the action point where an external force acts when crimping the wire crimping portion 22 by crimping. This action point is a position where the terminal crimping surface (described later) of the crimping die directly abuts and an external force directly acts on the cylindrical body 22A of the wire crimping portion 22 during crimping. With this configuration as well, when the wire crimping portion 22 is crimped, the cylindrical body 22A can be greatly deformed. Therefore, the amount of deformation in the axial direction X (longitudinal direction) of the terminal 20 can be increased, and the range in the axial direction X in which the core wire 11 of the electric wire 10 is compressed can be lengthened. Therefore, the electrical resistance of the wire crimping portion 22 can be reduced by increasing the contact area between the wire crimping portion 22 and the core wire 11 .

また、切欠部３０は、図３に示しように、この切欠部３０の周方向Ｙの両端３０Ａ，３０Ａと筒体２２Ａの中心Ｏとがなす中心角αが、９０［°］≦α≦１８０［°］の範囲を満たしている。中心角αが９０［°］よりも小さいと、電線圧着部２２の剛性の低下が十分でなく、電線圧着部と電線の芯線とを良好に圧着することが困難となる。また、中心角αが１８０［°］よりも大きいと、端子２０としての剛性が低下することが懸念される。本構成では、中心角αが、９０［°］≦α≦１８０［°］の範囲を満たしているため、端子２０の剛性を確保しつつ、電線圧着部と電線の芯線とを良好に圧着することを可能とし、圧着作業の回数削減による作業時間の低減を図ることができる。また、中心角αは、１２０［°］≦α≦１８０［°］の範囲を満たすことがより好ましい。 In addition, as shown in FIG. 3, the notch 30 has a center angle α formed between both ends 30A, 30A of the notch 30 in the circumferential direction Y and the center O of the cylindrical body 22A is 90[°]≦α≦180. The [°] range is satisfied. If the central angle α is smaller than 90[°], the rigidity of the wire crimping portion 22 is not sufficiently lowered, and it becomes difficult to crimp the wire crimping portion and the core wire of the wire satisfactorily. Moreover, if the central angle α is greater than 180[°], there is concern that the rigidity of the terminal 20 will be reduced. In this configuration, since the center angle α satisfies the range of 90 [°] ≤ α ≤ 180 [°], the wire crimping portion and the core wire of the wire are crimped well while ensuring the rigidity of the terminal 20. It is possible to reduce the working time by reducing the number of crimping operations. More preferably, the central angle α satisfies the range of 120[°]≦α≦180[°].

次に、電線１０を端子２０に加締めて圧着する手順について説明する。図４は、圧着前の電線と電線圧着部とを示す周方向断面図である。図５は、圧着した状態の電線と電線圧着部とを示す周方向断面図である。図６は、圧着後の電線と電線圧着部とを示す周方向断面図である。図７は、電線を電線圧着部に圧着した状態の端子の軸方向断面図である。 Next, a procedure for crimping and crimping the electric wire 10 to the terminal 20 will be described. FIG. 4 is a circumferential cross-sectional view showing the wire before crimping and the wire crimping portion. FIG. 5 is a circumferential cross-sectional view showing an electric wire and an electric wire crimping portion in a crimped state. FIG. 6 is a circumferential cross-sectional view showing the wire and the wire crimping portion after crimping. FIG. 7 is an axial cross-sectional view of the terminal in a state where the electric wire is crimped to the electric wire crimping portion.

本実施形態では、電線１０と端子２０との圧着作業は加締用ダイス５０を用いて実行される。加締用ダイス５０は、図４～６に示すように、相互に突き合わす一対のダイス本体５１，５１を備え、各ダイス本体５１には、それぞれ突き合わせ面５２と加締部５３とが形成されている。加締部５３は、断面六角形の相対向する二頂点を結ぶ線分で二等分した形状となっている。つまり、図５に示すように、一対のダイス本体５１，５１を上下方向に高いに接近するように閉じる（突き合わせる）と、一対の加締部５３，５３が合わさって断面六角形状になる。これら加締部５３，５３の内壁面は、それぞれ円筒形状の電線圧着部２２を直接加締める端子加締面５４，５４となっている。 In this embodiment, the crimping operation of the electric wire 10 and the terminal 20 is performed using a crimping die 50 . As shown in FIGS. 4 to 6, the crimping die 50 has a pair of die bodies 51, 51 that abut each other, and each die body 51 is formed with a butting surface 52 and a crimping portion 53. ing. The caulking portion 53 has a shape that is bisected by a line segment connecting two vertexes of a hexagonal cross section that face each other. That is, as shown in FIG. 5, when the pair of die bodies 51, 51 are closed (butted against each other) so as to come close to each other in the vertical direction, the pair of caulking portions 53, 53 join together to form a hexagonal cross section. The inner wall surfaces of these crimping portions 53, 53 are terminal crimping surfaces 54, 54 for directly crimping the cylindrical wire crimping portion 22, respectively.

図４に示すように、芯線１１が露出した電線１０を端子２０の電線圧着部２２（筒体２２Ａ）に挿入し、一対のダイス本体５１，５１を上下方向（矢印方向）に閉じて、これらダイス本体５１，５１をそれぞれ突き合わせ面５２，５２で突き合わせる。これにより、図５に示すように、断面円筒形状の電線圧着部２２が断面六角形状に変形して内部の芯線１１を加締めて圧着する。そして、図６に示すように、一対のダイス本体５１，５１を上下方向（矢印方向）に相互に離間させて開くことにより、電線１０が電線圧着部２２に圧着された端子付き電線１が製造される。 As shown in FIG. 4, the wire 10 with the core wire 11 exposed is inserted into the wire crimping portion 22 (cylindrical body 22A) of the terminal 20, and the pair of die bodies 51, 51 are closed vertically (in the direction of the arrow) to The die bodies 51, 51 are butted against each other at the butting surfaces 52, 52, respectively. As a result, as shown in FIG. 5, the wire crimping portion 22 having a cylindrical cross section is deformed into a hexagonal cross section, and the core wire 11 inside is crimped and crimped. Then, as shown in FIG. 6, the pair of die bodies 51, 51 are separated from each other in the vertical direction (in the direction of the arrow) and opened to manufacture the electric wire 1 with the terminal in which the electric wire 10 is crimped to the electric wire crimping portion 22. be done.

また、本実施形態では、端子２０の電線圧着部２２は、中空筒状の筒体２２Ａの一部を周方向に沿って部分的に切欠いた切欠部３０を有するため、一対のダイス本体５１，５１で加締める際に、電線圧着部２２に大きな変形を与えることができる。このため、圧着した際に電線圧着部２２と電線１０の芯線１１との接触面積が増加することにより電線圧着部２２の電気抵抗を低減することができる。また、少ない圧着回数で電線圧着部２２と電線１０の芯線１１とを良好に圧着できるため、例えば、１回の圧着作業で必要な芯線１１の圧縮量を得ることができ、圧着作業の回数削減による作業時間の低減を図ることができる。 In addition, in the present embodiment, the wire crimping portion 22 of the terminal 20 has the notch portion 30 formed by partially notching the cylindrical body 22A in the hollow cylindrical shape along the circumferential direction. When crimping at 51, the wire crimping portion 22 can be greatly deformed. Therefore, the electrical resistance of the wire crimping portion 22 can be reduced by increasing the contact area between the wire crimping portion 22 and the core wire 11 of the wire 10 when crimped. In addition, since the wire crimping portion 22 and the core wire 11 of the wire 10 can be crimped well with a small number of crimping operations, for example, the required amount of compression of the core wire 11 can be obtained in one crimping operation, and the number of crimping operations can be reduced. It is possible to reduce the working time by

更に、切欠部３０は、図７に示すように、電線圧着部２２を加締めて圧着する際に、ダイス本体５１，５１の端子加締面５４，５４が電線圧着部２２に当接して外力を作用させる作用点２８よりも軸線方向Ｘにおける電線圧着部２２の閉塞端面２４側に形成されている。これによれば、電線圧着部２２を加締めた際に、電線圧着部２２の筒体２２Ａに大きな変形を与えることができるようになる。このため、切欠部３０を設けていない構成と比較して、端子２０の軸線方向Ｘ（長手方向）の変形量も増加させることができ、電線１０の芯線１１を圧縮している軸線方向Ｘの範囲を長くすることができる。従って、電線圧着部２２と芯線１１との接触面積が増加することにより電線圧着部２２の電気抵抗を低減することができ、大電流が通電される端子２０の電線圧着部２２の信頼性の向上を図ることができる。 7, when the wire crimping portion 22 is crimped and crimped, the terminal crimping surfaces 54, 54 of the die bodies 51, 51 come into contact with the wire crimping portion 22, and an external force is applied to the notch portion 30. is formed closer to the closed end face 24 of the wire crimping portion 22 in the axial direction X than the action point 28 where the pressure is applied. According to this, when the wire crimping portion 22 is crimped, the cylindrical body 22A of the wire crimping portion 22 can be greatly deformed. Therefore, compared to a configuration in which the notch 30 is not provided, the amount of deformation in the axial direction X (longitudinal direction) of the terminal 20 can be increased, and the deformation in the axial direction X compressing the core wire 11 of the electric wire 10 can be increased. Range can be lengthened. Therefore, the electrical resistance of the wire crimping portion 22 can be reduced by increasing the contact area between the wire crimping portion 22 and the core wire 11, and the reliability of the wire crimping portion 22 of the terminal 20 to which a large current is passed is improved. can be achieved.

以上、本実施形態に係る端子２０は、軸線方向Ｘの一端に形成されて相手方端子と接続可能な電気接続部２１と、軸線方向Ｘの他端に中空筒状に形成されて内部に挿入された電線１０の芯線１１を圧着可能な電線圧着部２２と、軸線方向Ｘにおける電気接続部２１と電線圧着部２２との間に当該電気接続部２１および当該電線圧着部２２と一体で中実状に形成されて、電気接続部２１と電線圧着部２２とを繋ぐ繋ぎ部２３と、を備え、電線圧着部２２は、中空筒状の筒体２２Ａを周方向に沿って部分的に切欠いた切欠部３０を有する。また、本実施形態に係る端子付き電線１は、導電性の芯線１１を絶縁被覆１２で被覆してなる電線１０と、この電線１０に圧着された上記した端子２０と、を備えて構成される。この構成によれば、端子２０、及び、端子付き電線１は、切欠部３０が電線圧着部２２の筒体２２Ａの剛性を低減させることにより、電線圧着部２２に大きな変形を与えることができる。このため、電線圧着部と電線の芯線とを良好に圧着することができるので、適正に導通性能を確保することができる。例えば、切欠部３０により電線圧着部２２の筒体２２Ａの剛性が低下するため、圧着した際に電線圧着部２２と電線１０の芯線１１との接触面積が増加することにより電線圧着部２２の電気抵抗を低減することができる。また、少ない圧着回数で電線圧着部２２と電線１０の芯線１１とを良好に圧着できるため、例えば、１回の圧着作業で必要な電線の圧縮量を得ることができ、圧着作業の回数削減による作業時間の低減を図ることができる。 As described above, the terminal 20 according to the present embodiment includes the electrical connection portion 21 formed at one end in the axial direction X and capable of being connected to a mating terminal, and the hollow tubular shape formed at the other end in the axial direction X and inserted thereinto. A wire crimping portion 22 capable of crimping the core wire 11 of the electric wire 10, and an electric connection portion 21 and a wire crimping portion 22 in the axial direction X are integrally formed in a solid shape with the electric connection portion 21 and the wire crimping portion 22 A connection portion 23 is formed to connect the electrical connection portion 21 and the wire crimping portion 22, and the wire crimping portion 22 is a notch portion obtained by partially notching the hollow cylindrical cylindrical body 22A along the circumferential direction. has 30. Further, the electric wire 1 with a terminal according to the present embodiment includes an electric wire 10 formed by covering a conductive core wire 11 with an insulating coating 12, and the terminal 20 crimped to the electric wire 10. . According to this configuration, the notch 30 of the terminal 20 and the electric wire with terminal 1 reduces the rigidity of the cylindrical body 22A of the electric wire crimping portion 22, so that the electric wire crimping portion 22 can be greatly deformed. Therefore, the electric wire crimping portion and the core wire of the electric wire can be crimped well, so that the conduction performance can be properly secured. For example, since the rigidity of the cylindrical body 22A of the wire crimping portion 22 is reduced by the notch portion 30, the contact area between the wire crimping portion 22 and the core wire 11 of the wire 10 increases when the wire crimping portion 22 is crimped. resistance can be reduced. In addition, since the wire crimping portion 22 and the core wire 11 of the wire 10 can be crimped well with a small number of crimping operations, for example, the required amount of compression of the wire can be obtained in one crimping operation, and the number of crimping operations can be reduced. Work time can be reduced.

本実施形態に係る端子２０において、電線圧着部２２は、軸線方向Ｘの繋ぎ部２３側が閉塞して閉塞端面２４を構成し、切欠部３０は、電線圧着部２２を加締めて圧着する際に外力が作用する作用点２８よりも軸線方向Ｘにおける電線圧着部２２の閉塞端面２４側に形成される。この構成によれば、切欠部３０が閉塞端面２４側に設けられてため、電線圧着部２２を加締めた際に、電線圧着部２２の筒体２２Ａに大きな変形を与えることができるようになる。このため、切欠部３０を設けていない構成と比較して、端子２０の軸線方向Ｘ（長手方向）の変形量も増加させることができ、電線１０の芯線１１を圧縮している軸線方向Ｘの範囲を長くすることができる。従って、電線圧着部２２と芯線１１との接触面積が増加することにより電線圧着部２２の電気抵抗を低減することができ、大電流が通電される端子２０の電線圧着部２２の信頼性の向上を図ることができる。 In the terminal 20 according to the present embodiment, the wire crimping portion 22 is closed on the connecting portion 23 side in the axial direction X to form a closed end face 24, and the notch portion 30 is formed when the wire crimping portion 22 is crimped by crimping. It is formed closer to the closed end surface 24 of the wire crimping portion 22 in the axial direction X than the action point 28 where the external force acts. According to this configuration, the cutout portion 30 is provided on the closed end surface 24 side, so that when the wire crimping portion 22 is crimped, the cylindrical body 22A of the wire crimping portion 22 can be largely deformed. . Therefore, compared with a configuration in which the notch 30 is not provided, the amount of deformation in the axial direction X (longitudinal direction) of the terminal 20 can be increased, and the deformation in the axial direction X in which the core wire 11 of the electric wire 10 is compressed can be increased. Range can be lengthened. Therefore, the electrical resistance of the wire crimping portion 22 can be reduced by increasing the contact area between the wire crimping portion 22 and the core wire 11, and the reliability of the wire crimping portion 22 of the terminal 20 to which a large current is passed is improved. can be achieved.

また、本実施形態に係る端子２０において、電線圧着部２２は、閉塞端面２４が円錘状に軸線方向Ｘに凹んだ形状を有し、切欠部３０は、筒体２２Ａの内面２５と閉塞端面２４との境界部２６の筒体２２Ａの内面２５側に当該境界部２６に隣接して形成される。この構成によれば、切欠部３０が閉塞端面２４に隣接して設けられるため、電線圧着部２２を加締めた際に、筒体２２Ａに大きな変形を与えることができるようになる。このため、端子２０の軸線方向Ｘ（長手方向）の変形量も増加させることができ、電線１０の芯線１１を圧縮している軸線方向Ｘの範囲を長くすることができる。従って、電線圧着部２２と芯線１１との接触面積が増加することにより電線圧着部２２の電気抵抗を低減することができ、大電流が通電される端子２０の電線圧着部２２の信頼性の向上を図ることができる。 Further, in the terminal 20 according to the present embodiment, the wire crimping portion 22 has a closed end surface 24 that is recessed in the axial direction X in a conical shape, and the notch portion 30 is formed between the inner surface 25 of the tubular body 22A and the closed end surface. 24 is formed on the inner surface 25 side of the cylindrical body 22A adjacent to the boundary portion 26. As shown in FIG. According to this configuration, the cutout portion 30 is provided adjacent to the closed end face 24, so that when the wire crimping portion 22 is crimped, the cylindrical body 22A can be greatly deformed. Therefore, the amount of deformation in the axial direction X (longitudinal direction) of the terminal 20 can be increased, and the range in the axial direction X in which the core wire 11 of the electric wire 10 is compressed can be lengthened. Therefore, the electrical resistance of the wire crimping portion 22 can be reduced by increasing the contact area between the wire crimping portion 22 and the core wire 11, and the reliability of the wire crimping portion 22 of the terminal 20 to which a large current is passed is improved. can be achieved.

また、本実施形態に係る端子２０において、切欠部３０は、中心角αが９０［°］≦α≦１８０［°］の範囲を満たすため、端子２０の剛性を確保しつつ、電線圧着部と電線の芯線とを良好に圧着することを可能とし、圧着作業の回数削減による作業時間の低減を図ることができる。 In addition, in the terminal 20 according to the present embodiment, the cutout portion 30 satisfies the range of 90 [°] ≤ α ≤ 180 [°] for the center angle α. It is possible to satisfactorily crimp the core wire of the electric wire, and it is possible to reduce the working time by reducing the number of crimping operations.

次に、参考例に係る端子について説明する。図８は、参考例に係る端子付き電線の端子を示す斜視図である。図９は、図８の端子のＢ－Ｂ断面図である。図１０は、電線を電線圧着部に圧着する前の端子の軸方向断面図である。図１１は、電線を電線圧着部に圧着した状態の端子の軸方向断面図である。この参考例の説明にあたり、上記した実施形態と同一の構成については同一の符号を付して説明を省略する。 Next, a terminal according to a reference example will be described. FIG. 8 is a perspective view showing a terminal of an electric wire with a terminal according to a reference example. 9 is a cross-sectional view of the terminal of FIG. 8 taken along the line BB. FIG. 10 is an axial cross-sectional view of the terminal before the electric wire is crimped to the electric wire crimping portion. FIG. 11 is an axial cross-sectional view of the terminal in a state in which the electric wire is crimped to the electric wire crimping portion. In describing this reference example, the same reference numerals are given to the same configurations as in the above-described embodiment, and the description thereof will be omitted.

この参考例に係る端子１２０は、図８および図９に示すように、軸線方向Ｘの一端に中空筒状に形成された電気接続部２１と、他端に中空筒状に形成された電線圧着部２２と、電気接続部２１と電線圧着部２２との間に繋ぎ部２３とを備えている。これらの構成は、上記した実施形態の端子２０と同一である。一方、実施形態の端子１２０では、電線圧着部２２は、中空筒状の筒体２２Ａに周方向に沿って延びる環状の溝部４０を有している。この溝部４０は、筒体２２Ａの肉厚を部分的に薄肉化したものであり、筒体２２Ａの剛性を部分的に脆弱化している。この溝部４０が形成される位置については、上記した切欠部３０と同等である。 As shown in FIGS. 8 and 9, the terminal 120 according to this reference example has an electrical connection portion 21 formed in a hollow tubular shape at one end in the axial direction X, and a wire crimping portion formed in a hollow tubular shape at the other end. A connecting portion 23 is provided between the electrical connection portion 21 and the wire crimping portion 22 . These configurations are the same as those of the terminal 20 of the embodiment described above. On the other hand, in the terminal 120 of the embodiment, the wire crimping portion 22 has an annular groove portion 40 extending along the circumferential direction in the hollow tubular body 22A. The groove portion 40 is formed by partially thinning the thickness of the cylindrical body 22A, thereby partially weakening the rigidity of the cylindrical body 22A. The positions where the grooves 40 are formed are the same as the cutouts 30 described above.

ここで、この参考例では、電線圧着部２２に周方向に沿って延びる環状の溝部４０を設けているが、この溝部４０だけでは、加締めて圧着する際に電線圧着部２２に大きな変形を与えることができない。このため、この参考例では、電線１０と端子１２０との圧着作業で用いられる加締用ダイス５０Ａは、図１０に示すように、一方（図１０では上側）のダイス本体５１Ａに加締めるとともに、溝部４０を破断するための破断刃５５を備えている。この破断刃５５は、刃先５５Ａが溝部４０に当接する位置に配置されている。また、破断刃５５の刃先５５Ａは、上側のダイス本体５１Ａの端子加締面５４と電線圧着部２２とが当接するよりも前に、溝部４０の溝底に当接して該溝部４０が破断されるようになっている。 Here, in this reference example, the wire crimping portion 22 is provided with an annular groove portion 40 extending along the circumferential direction. can't give Therefore, in this reference example, as shown in FIG. 10, the crimping die 50A used for crimping the electric wire 10 and the terminal 120 crimps the die body 51A on one side (the upper side in FIG. 10), A breaking blade 55 for breaking the groove 40 is provided. The breaking blade 55 is arranged at a position where the cutting edge 55A contacts the groove portion 40 . Further, the cutting edge 55A of the breaking blade 55 comes into contact with the groove bottom of the groove portion 40 and breaks the groove portion 40 before the terminal crimping surface 54 of the upper die body 51A and the wire crimping portion 22 come into contact with each other. It has become so.

電線１０を端子１２０に加締めて圧着する場合には、図１０に示すように、芯線１１が露出した電線１０を端子１２０の電線圧着部２２（筒体２２Ａ）に挿入し、一対のダイス本体５１Ａ，５１の間に電線１０が挿入された端子１２０をセットする。この際、破断刃５５の刃先５５Ａの下方に溝部４０が位置するように端子１２０が配置される。 When crimping the electric wire 10 to the terminal 120 by crimping, as shown in FIG. A terminal 120 with an electric wire 10 inserted between 51A and 51 is set. At this time, the terminal 120 is arranged so that the groove portion 40 is positioned below the cutting edge 55A of the breaking blade 55 .

次に、図１１に示すように、一対のダイス本体５１Ａ，５１を上下方向（矢印方向）に閉じて、これらダイス本体５１Ａ，５１を突き合わせる。これにより、まず破断刃５５の刃先５５Ａが溝部４０の溝底に当接し、この溝底に大きな応力が集中する。溝部４０は、電線圧着部２２（筒体２２Ａ）の中で肉厚が薄く脆弱な部位であるため、電線圧着部２２（筒体２２Ａ）の溝部４０が部分的に破断する。 Next, as shown in FIG. 11, the pair of die bodies 51A and 51 are closed vertically (in the direction of the arrow) and are brought into contact with each other. As a result, the cutting edge 55A of the breaking blade 55 first comes into contact with the groove bottom of the groove portion 40, and a large stress is concentrated on this groove bottom. Since the groove 40 is a thin and fragile portion of the wire crimping portion 22 (cylindrical body 22A), the groove 40 of the wire crimping portion 22 (cylindrical body 22A) is partially broken.

溝部４０の破断に続いて、一対のダイス本体５１Ａ，５１の端子加締面５４，５４が電線圧着部２２に当接して該電線圧着部２２が変形して内部の芯線１１を加締めて圧着する。この場合、溝部４０が部分的に周方向に破断しているため、一対のダイス本体５１Ａ，５１で加締める際に、電線圧着部２２に大きな変形を与えることができる。これにより、電線圧着部と電線の芯線とを良好に圧着することができるので、適正に導通性能を確保することができる。例えば、溝部４０が部分的に周方向に破断することにより、電線圧着部２２の筒体２２Ａの剛性が低下する。このため、圧着した際に電線圧着部２２と電線１０の芯線１１との接触面積が増加することにより電線圧着部２２の電気抵抗を低減することができる。また、少ない圧着回数で電線圧着部２２と電線１０の芯線１１とを良好に圧着できるため、例えば、１回の圧着作業で必要な電線の圧縮量を得ることができ、圧着作業の回数削減による作業時間の低減を図ることができる。 Following breakage of the groove 40, the terminal crimping surfaces 54, 54 of the pair of die bodies 51A, 51 abut against the wire crimping portion 22, and the wire crimping portion 22 is deformed to crimp and crimp the core wire 11 inside. do. In this case, since the groove portion 40 is partially broken in the circumferential direction, the wire crimping portion 22 can be greatly deformed when crimping with the pair of die bodies 51A and 51A. As a result, the electric wire crimping portion and the core wire of the electric wire can be crimped well, so that the conduction performance can be appropriately secured. For example, when the groove portion 40 is partially fractured in the circumferential direction, the rigidity of the cylindrical body 22A of the wire crimping portion 22 is reduced. Therefore, the electrical resistance of the wire crimping portion 22 can be reduced by increasing the contact area between the wire crimping portion 22 and the core wire 11 of the wire 10 when crimped. In addition, since the wire crimping portion 22 and the core wire 11 of the wire 10 can be crimped well with a small number of crimping operations, for example, the required amount of compression of the wire can be obtained in one crimping operation, and the number of crimping operations can be reduced. Work time can be reduced.

そして、一対のダイス本体５１Ａ，５１を上下方向に相互に離間させて開くことにより、電線１０が電線圧着部２２に圧着された端子付き電線１Ａが製造される。 Then, the pair of die bodies 51A and 51 are separated from each other in the vertical direction and opened to manufacture the electric wire 1A with a terminal in which the electric wire 10 is crimped to the electric wire crimping portion 22. As shown in FIG.

また、溝部４０は、図１１に示すように、電線圧着部２２を加締めて圧着する際に、ダイス本体５１Ａ，５１の端子加締面５４，５４が電線圧着部２２に当接して外力を作用させる作用点２８よりも軸線方向Ｘにおける電線圧着部２２の閉塞端面２４側に形成されている。これによれば、電線圧着部２２を加締めた際に、電線圧着部２２の筒体２２Ａに大きな変形を与えることができるようになる。このため、溝部４０を破断しない構成と比較して、端子１２０の軸線方向Ｘ（長手方向）の変形量も増加させることができ、電線１０の芯線１１を圧縮している軸線方向Ｘの範囲を長くすることができる。従って、電線圧着部２２と芯線１１との接触面積が増加することにより電線圧着部２２の電気抵抗を低減することができ、大電流が通電される端子１２０の電線圧着部２２の信頼性の向上を図ることができる。 11, when the wire crimping portion 22 is crimped by crimping, the terminal crimping surfaces 54, 54 of the die bodies 51A, 51 come into contact with the wire crimping portion 22 to apply an external force. It is formed closer to the closed end face 24 of the wire crimping portion 22 in the axial direction X than the action point 28 to act. According to this, when the wire crimping portion 22 is crimped, the cylindrical body 22A of the wire crimping portion 22 can be greatly deformed. Therefore, compared to a configuration in which the groove portion 40 is not broken, the amount of deformation in the axial direction X (longitudinal direction) of the terminal 120 can be increased, and the range in the axial direction X in which the core wire 11 of the electric wire 10 is compressed can be increased. can be longer. Therefore, the electrical resistance of the wire crimping portion 22 can be reduced by increasing the contact area between the wire crimping portion 22 and the core wire 11, and the reliability of the wire crimping portion 22 of the terminal 120 to which a large current is passed is improved. can be achieved.

なお、上述した本発明の実施形態に係る端子付き電線１は、上述した実施形態に限定されず、特許請求の範囲に記載された範囲で種々の変更が可能である。例えば、本実施形態参考例では、端子２０、１２０の電気接続部２１および電線圧着部２２は、それぞれ円筒形状としたが、例えば楕円筒状や角筒状であってもよい。また、端子２０、１２０の電気接続部２１および電線圧着部２２は、ほぼ同心状に形成されているが、電気接続部２１および電線圧着部２２の中心をそれぞれ偏心させた構成としてもよい。また、端子２０、１２０は、導電性の丸棒を削り出して形成した構成としているが、例えば、鋳造などで製造することもできる。 In addition, the electric wire 1 with a terminal according to the embodiment of the present invention described above is not limited to the embodiment described above, and various modifications are possible within the scope of the claims. For example, in the reference example of the present embodiment, the electrical connection portions 21 and the wire crimping portions 22 of the terminals 20 and 120 are each cylindrical, but they may be elliptical or rectangular, for example. Also, although the electrical connection portions 21 and the wire crimping portions 22 of the terminals 20 and 120 are formed substantially concentrically, the centers of the electrical connection portions 21 and the wire crimping portions 22 may be eccentric. In addition, although the terminals 20 and 120 are formed by cutting out conductive round bars, they can be manufactured by, for example, casting.

なお、本実施形態および参考例では、端子２０、１２０は、中空筒状に形成されて内部に相手方端子等の接続相手部材が挿入されて接続可能とする電気接続部２１を備えた構成を説明したが、電気接続部２１の形状はこれに限るものではない。例えば、電気接続部が柱状（タブ状）に形成され、相手方端子（接続相手部材）が中空筒状に形成された構成としても良いし、電気接続部が丸形端子形状に形成され、接続相手部材として、接続対象となる装置に設けられた相手方端子やバスバー等の導電部材、あるいは、車体ボディ等のグランド部材に接続される構成としてもよい。 In the present embodiment and the reference example, the terminals 20 and 120 are formed in a hollow cylindrical shape, and are provided with an electrical connection portion 21 into which a connection counterpart member such as a counterpart terminal can be inserted to enable connection. However, the shape of the electrical connection portion 21 is not limited to this. For example, the electrical connection portion may be formed in a columnar shape (tab shape) and the mating terminal (connection mating member) may be formed in a hollow cylindrical shape. The member may be configured to be connected to a counterpart terminal provided in a device to be connected, a conductive member such as a bus bar, or a ground member such as a vehicle body.

１、１Ａ端子付き電線
１０電線
１１芯線
１２絶縁被覆
２０、１２０端子
２１電気接続部
２２電線圧着部
２２Ａ筒体
２３繋ぎ部
２４閉塞端面
２５内面
２６境界部
２８作用点
３０切欠部
４０溝部
５０、５０Ａ加締用ダイス
５１、５１Ａダイス本体
５３加締部
５４端子加締面
５５破断刃
５５Ａ刃先
Ｘ軸線方向
Ｙ周方向
α 中心角 Reference Signs List 1, 1A Electric wire with terminal 10 Electric wire 11 Core wire 12 Insulating coating 20, 120 Terminal 21 Electric connecting part 22 Electric wire crimping part 22A Cylindrical body 23 Connecting part 24 Closed end surface 25 Inner surface 26 Boundary part 28 Point of action 30 Notch part 40 Groove part 50, 50A Crimping dies 51, 51A Die body 53 Crimping portion 54 Terminal crimping surface 55 Fracture edge 55A Cutting edge X Axial direction Y Circumferential direction α Central angle

Claims

an electrical connection portion formed at one end in the axial direction and connectable to a connection mating member;
an electric wire crimping portion formed in a hollow cylindrical shape at the other end in the axial direction and capable of crimping a core wire of an electric wire inserted therein;
A connecting portion formed integrally with the electrical connection portion and the wire crimping portion between the electrical connection portion and the wire crimping portion in the axial direction and having a solid shape to connect the electrical connection portion and the wire crimping portion. and
The electric wire crimping portion has a notch portion obtained by partially notching the hollow tubular body along the circumferential direction.

The wire crimping portion is closed on the connecting portion side in the axial direction to form a closed end surface,
2. The terminal according to claim 1, wherein the cutout portion is formed closer to the closed end face side of the wire crimping portion in the axial direction than a point of action at which an external force acts when the wire crimping portion is crimped by crimping.

The wire crimping portion has a shape in which the closed end face is recessed in the axial direction in a conical shape,
3. The terminal according to claim 2, wherein the cutout portion is formed adjacent to the boundary portion between the inner surface of the cylindrical body and the closed end surface on the inner surface side of the cylindrical body.

The terminal according to any one of claims 1 to 3, wherein the notch satisfies a range of 90[°]≤α≤180[°] in central angle α.

An electric wire formed by covering a conductive core wire with an insulating coating;
and a terminal crimped to the electric wire,
the terminal includes an electrical connection portion formed at one end in an axial direction and connectable to a connection mating member;
a wire crimping portion formed in a hollow cylindrical shape at the other end in the axial direction and capable of crimping the core wire inserted therein;
A connecting portion formed integrally with the electrical connection portion and the wire crimping portion between the electrical connection portion and the wire crimping portion in the axial direction and having a solid shape to connect the electrical connection portion and the wire crimping portion. and
The electric wire with a terminal, wherein the electric wire crimping portion has a notch portion obtained by partially notching the hollow tubular body along the circumferential direction.