JPH10125362A - Terminal fitting - Google Patents

Terminal fitting

Info

Publication number
JPH10125362A
JPH10125362A JP27807496A JP27807496A JPH10125362A JP H10125362 A JPH10125362 A JP H10125362A JP 27807496 A JP27807496 A JP 27807496A JP 27807496 A JP27807496 A JP 27807496A JP H10125362 A JPH10125362 A JP H10125362A
Authority
JP
Japan
Prior art keywords
wire
serration
serrations
crimping
terminal fitting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP27807496A
Other languages
Japanese (ja)
Other versions
JP3343880B2 (en
Inventor
Nobuyuki Asakura
Tadahisa Sakaguchi
忠久 坂口
信幸 朝倉
Original Assignee
Yazaki Corp
矢崎総業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yazaki Corp, 矢崎総業株式会社 filed Critical Yazaki Corp
Priority to JP27807496A priority Critical patent/JP3343880B2/en
Publication of JPH10125362A publication Critical patent/JPH10125362A/en
Application granted granted Critical
Publication of JP3343880B2 publication Critical patent/JP3343880B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To provide a crimp fitting, having high wire holding power without damages to the wire by applying the constitution that the corner part of the serration of inverted trapezoidal cross section on the end of a recess on the inner surface of a conductor caulking piece be formed to have a larger obtuse angle outside than inside. SOLUTION: In a terminal fitting T, having an electrical contact part on the front of a terminal fitting substrate, and a wire crimping part made of a pair of a conductor caulking piece and an insulator caulking piece on the rear part, a plurality of serrations 10 orthogonal with an axial direction are recessed on the inner surface of the conductor caulking piece. Also, wire conductors are placed on the wire-crimping part and plastically deformed under the application of an external force, thereby being bonded and connected mechanically. Regarding the serrations 10, the cross section of the serrations 101 and 103 off the center serration 102 and near an end position are formed to be an inverted trapezoid and asymmetric right and left, with the angle θ' of an outer corner 11' kept as a larger obtuse angle than the angle θ of an inner corner 11. According to this construction, even a fine size wire becomes free from damages due to a serration angle, and high wire-holding power is maintained.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【0001】[0001]
【発明の属する技術分野】本発明は、電線に圧着される
端子金具に関し、その圧着特性を高めるようにしたもの
である。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal fitting to be crimped to an electric wire, and to improve the crimping characteristics thereof.
【0002】[0002]
【従来の技術】従来、端子と電線の芯線との接続方法と
して圧着接続が広く採用されている。圧着接続とは、端
子の圧着部に芯線を載せて上型と下型とにより外力を加
えて塑性変形させ、機械的に結合,接続するものであ
り、圧着部には安定した導通性(電気性能)と高い電線
保持力が要求される。このような圧着特性を確保するた
め端子内面にセレーションと呼ばれる溝を設けることが
多い。
2. Description of the Related Art Conventionally, crimp connection has been widely used as a method for connecting a terminal and a core of an electric wire. Crimping connection is a method in which a core wire is placed on the crimping part of a terminal, an external force is applied by an upper mold and a lower mold to plastically deform, and the crimping part is mechanically connected and connected. Performance) and high wire holding force. In order to secure such crimping characteristics, a groove called serration is often provided on the inner surface of the terminal.
【0003】図9は従来の端子金具の一例を示す。即
ち、端子金具tは、基板1の前部に相手端子(図示せ
ず)に対する電気接触部2を有し、後部に電線圧着部3
を有し、該電線圧着部3には一対の導体加締片4、4と
一対の絶縁体加締片5、5とが設けられると共に、導体
加締片4、4間においてその内面には複数のセレーショ
ン6が端子軸と直交する方向に所定のピッチで並設され
ている。図10(A)、(B)はセレーション6の断面
図を示し、各セレーション61,62 ,63 は左右対称
形をした逆台形の溝であり、溝巾(開き寸法)a、溝底
巾m,深さkおよびエッジ角θ(θ=tan-1(a−
m)/2k)は同一である。このセレーション6の部分
に電線7の芯線8をのせて図示しない上金型(クリン
パ)と下金型(アンビル)で圧着する。
FIG. 9 shows an example of a conventional terminal fitting. That is, the terminal fitting t has an electric contact portion 2 for a mating terminal (not shown) at the front of the substrate 1 and an electric wire crimping portion 3 at the rear.
The electric wire crimping part 3 is provided with a pair of conductor caulking pieces 4, 4 and a pair of insulator caulking pieces 5, 5, and between the conductor caulking pieces 4, 4, an inner surface thereof is provided. A plurality of serrations 6 are arranged side by side at a predetermined pitch in a direction orthogonal to the terminal axis. Figure 10 (A), (B) shows a sectional view of the serrations 6, the serrations 6 1 and 6 2, 6 3 is an inverted trapezoidal groove has a symmetrical shape, the groove width (opening size) a, grooves Bottom width m, depth k, and edge angle θ (θ = tan −1 (a−
m) / 2k) are the same. The core wire 8 of the electric wire 7 is placed on the serration 6 and crimped with an upper mold (crimper) (not shown) and a lower mold (anvil).
【0004】上記セレーション6の作用、効果として、
圧着時に芯線と端子間にクリーニング作用があり、
芯線と端子間の接触面積が増加するから、電気性能が向
上し、さらに、セレーション6の角度θのくさび作用
により電線保持力が向上する、と言われている。
The operation and effect of the serration 6 are as follows.
There is a cleaning action between the core wire and the terminal during crimping,
It is said that since the contact area between the core wire and the terminal is increased, the electric performance is improved, and further, the electric wire holding force is improved by the wedge action of the serration 6 at the angle θ.
【0005】[0005]
【発明が解決しようとする課題】上記セレーション6に
は上記のように圧着特性の向上に寄与する作用、効果が
あるが、とくに細ものサイズの電線(例えば0.5sq以
下)の圧着に際し、セレーション角部6aがエッジとな
り、屡々芯線にダメージを与え、電線保持力を大きく低
下させる点が問題になっていた。本発明は、上記の問題
点に鑑みてなされたものであり、細ものサイズの電線に
対してもセレーション角度によるダメージがなく、高い
電線保持力を維持し、以って安定した電気的接続状態が
得られる端子金具を提供することを課題とする。
Although the serrations 6 have the function and effect of contributing to the improvement of the crimping characteristics as described above, the serrations 6 are particularly suitable for crimping of small-sized electric wires (for example, 0.5 sq or less). The problem is that the corner 6a becomes an edge, often damaging the core wire and greatly reducing the wire holding force. The present invention has been made in view of the above problems, and has no damage caused by the serration angle even for a small-sized electric wire, maintains a high electric wire holding force, and thereby has a stable electric connection state. It is an object of the present invention to provide a terminal fitting capable of obtaining the above.
【0006】[0006]
【課題を解決するための手段】本発明者らは、セレーシ
ョンによりダメージが発生するメカニズムを解明するた
め、図1に示す試験方法を採用した。即ち、端子金具t
の電線圧着部3におけるマーカーとしてA、B…Eの5
本のセレーションをプレス刻印した。各セレーションは
寸法が同じく等ピッチであり、その断面形状は図10
(A)と同一である。また、電線7の芯線8には、各セ
レーションA〜Eに対応して細い鉄線a、b…eを巻き
つけてマーカーとした。
The present inventors have adopted the test method shown in FIG. 1 in order to clarify the mechanism by which serration causes damage. That is, the terminal fitting t
5 of A, B... E as markers in the wire crimping part 3 of FIG.
The serration of the book was stamped. Each serration has the same pitch as the dimensions, and its cross-sectional shape is shown in FIG.
Same as (A). Also, thin iron wires a, b... E corresponding to the serrations A to E were wound around the core wire 8 of the electric wire 7 to form a marker.
【0007】図2は電線圧着の結果を示すグラフであ
り、横軸は測定ポイント、縦軸は伸び量(mm)を示し、
曲線Mは電線の伸び量を、曲線Nは端子の伸び量をそれ
ぞれ表す。図2から明らかなように、端子、電線の双方
共に圧着部中心が端部に比べて伸び量が大で、端部ほど
少なくかつ端子と電線の伸び量に大きなずれ(※)があ
ることがわかる。即ち、セレーションにより電線が受け
るダメージは中心部から外側の端部程大になることが推
測される。
FIG. 2 is a graph showing the results of wire crimping, where the horizontal axis represents measurement points and the vertical axis represents elongation (mm).
Curve M represents the amount of extension of the electric wire, and curve N represents the amount of extension of the terminal. As can be seen from FIG. 2, the center of the crimped portion of both the terminal and the wire has a larger extension than the end, and the end has a smaller extension (*) in the extension between the terminal and the wire. Recognize. That is, it is presumed that the damage received by the electric wire due to the serration increases from the center to the outer end.
【0008】一方、圧着の際に電線が受ける剪断力は、
図3に示すように、セレーションの形状(開き寸法a)
が寄与し、電線が受けるダメージを抑えるためには剪断
力を低減することが望ましい。即ち、セレーション6を
横断して芯線8をのせて外力(プレス)をかける状態を
プレス荷重Pの一様な分布荷重を受ける両端突出梁と想
定し、P=プレス荷重、a、a′=溝の開き寸法(a′
>a、b,b′=溝の右側の支持長(b′<b)、c=
溝の左側の支持長(一定)とすると、セレーション6の
左右の角部G、Hの剪断力は、 FG =P〔l(l−2b)〕/2a FH =P〔l(l−2c)〕/2a で表される。そこで、片側(図中、右側)の角部Hを
H′のように外側に拡げて移動させたときの剪断力
H ′は、 FH ′=P〔l(l−2c)〕/2a′ で表される。a′>aであるから、FH ′<FH とな
る。即ち、従来のセレーション6の断面形状が左右対称
形をした逆台形であるのに対し、角部Hをα=a′−a
だけ外側にずらして左右非対称形にすれば、端部での電
線に対する剪断力を小さくすることができる。
On the other hand, the shear force applied to the electric wire during crimping is
As shown in FIG. 3, the serration shape (opening dimension a)
It is desirable to reduce the shearing force in order to suppress the damage to the electric wire. That is, assuming that a state in which the core wire 8 is applied across the serration 6 and an external force (press) is applied is a both-end projecting beam receiving a uniform distributed load of the press load P, P = press load, a, a '= groove Opening dimension (a '
> A, b, b '= support length on the right side of the groove (b'<b), c =
When left support length of the groove (constant), the corners G, shear forces H of the left and right serrations 6, F G = P [l (l-2b)] / 2a F H = P [l (l- 2c)] / 2a. Therefore, the shearing force F H ′ when one corner (the right side in the drawing) H is extended outward as H ′ and moved is F H ′ = P [l (l−2c)] / 2a ′. 'because it is> a, F H' a a <F H. That is, while the cross-sectional shape of the conventional serration 6 is an inverted trapezoid having a bilaterally symmetric shape, the corner H is defined as α = a′−a
If it is shifted outward only to form a left-right asymmetric shape, the shearing force on the electric wire at the end can be reduced.
【0009】本発明は、上記の知見に基づいて成された
ものであり、請求項1に記載のように、基板の前部に電
気接触部を設け、後部に一対の導体加締片と一対の絶縁
体加締片とを備える電線圧着部を設け、該一対の導体加
締片の一方から他方にかけて内面に複数のセレーション
を軸方向と直交して凹設して成る端子金具において、前
記複数のセレーションの中で中心部から離れた端部側の
セレーションの断面形状が逆台形状でかつ外側の角部が
内側の角部より大きな鈍角で左右非対称形に形成されて
いることを特徴とする。
The present invention has been made on the basis of the above-mentioned findings. As described in claim 1, an electric contact portion is provided on a front portion of a substrate, and a pair of conductor caulking pieces and a pair are provided on a rear portion. A terminal crimping portion provided with an insulator crimping piece, and a plurality of serrations recessed from one side to the other of the pair of conductor crimping pieces on the inner surface orthogonal to the axial direction. In the serrations, the cross-sectional shape of the serration on the end side away from the center is inverted trapezoidal, and the outer corner is formed to be asymmetrical with a larger obtuse angle than the inner corner. .
【0010】本発明によれば、上記構成の如くに、前記
複数のセレーションの中で中心部から離れた端部側のセ
レーションの断面形状が逆台形状でかつ外側の角部が内
側の角部より大きな鈍角で左右非対称形に形成されてい
るから、端部のセレーションにおける電線に対する剪断
力が小さくなり、芯線に与えるダメージが減少するの
で、その分電線保持力が強化され、安定な電気的接続状
態を得ることができる。
According to the present invention, as in the above configuration, the cross-sectional shape of the serration on the end side remote from the center in the plurality of serrations is inverted trapezoidal, and the outer corner is the inner corner. Since it is formed asymmetrical with a larger obtuse angle, the shearing force on the electric wire at the serration at the end is reduced, and the damage to the core wire is reduced, so the wire holding force is strengthened by that amount, and stable electrical connection You can get the status.
【0011】[0011]
【発明の実施の形態】以下、図面を参照して本発明の実
施の形態の一具体例について説明する。なお、従来例と
同様の構成部材については同一の符号を用いて説明す
る。図4および図5において、端子金具Tは基板部1の
前部に電気接続部2、後部に電線圧着部3を連成して成
り、電線圧着部3は一対の導体加締片4,4と一対の絶
縁体加締片5,5とを有し、導体加締片4,4の内面に
は基板部1も含めて3個のセレーション10(101
102 、103 )が端子軸と直交する方向に所定間隔で
凹説されている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific example of an embodiment of the present invention will be described below with reference to the drawings. The same components as those in the conventional example will be described using the same reference numerals. 4 and 5, the terminal fitting T is formed by coupling an electric connecting portion 2 to a front portion of a substrate portion 1 and an electric wire crimping portion 3 to a rear portion thereof. And a pair of insulator caulking pieces 5 and 5, and three serrations 10 (10 1 , 10 1 ,
10 2 , 10 3 ) are recessed at predetermined intervals in a direction orthogonal to the terminal axis.
【0012】以上は、従来と同様であるが、本発明にあ
っては図5(A)、(B)に示すように、3個のセレー
ション101 、102 、103 のうち、中央のセレーシ
ョン102 は断面が左右対称形の逆台形であるが、端側
(左右両端)のセレーション101 、103 は左右非対
称形であり、各セレーション101 、103 の外側の角
部11′の角度θ′は内側の角部11の角度θよりも大
きな鈍角に形成されている。図5(B)において、a,
a′=溝巾、m=溝底巾、k=溝の深さ、p=セレーシ
ョン間のピッチとすると、端子金具Tの基板1が板厚
0.4〜1.5mmの銅板、黄銅板、ベリリウム銅板など
の通常の端子用金属板の場合、 a =0.30mm±0.15mm a′=0.32mm±0.15mm m =0.20mm±0.05mm k =0.15mm±0.15mm p =1.00mm±0.15mm θ =104〜153゜ の範囲が使用されており、本発明におけるθ′は110
〜130゜の範囲が適当である。110゜よりも小さい
と、通常の角度θと殆ど変わらず剪断力を小さくするこ
とができず、また、110゜より大きな鈍角にすると、
くさび作用による電線保持力のアップ効果が期待できな
い。
The above is the same as the prior art, but in the present invention, as shown in FIGS. 5A and 5B, of the three serrations 10 1 , 10 2 and 10 3 , The serrations 10 2 are inverted trapezoids having a symmetrical cross section, but the serrations 10 1 , 10 3 on the end sides (both ends) are asymmetrical left and right, and the outer corners 11 ′ of each serration 10 1 , 10 3. Is formed at an obtuse angle larger than the angle θ of the inner corner 11. In FIG. 5B, a,
When a '= groove width, m = groove bottom width, k = groove depth, p = pitch between serrations, the substrate 1 of the terminal fitting T is made of a copper plate, a brass plate having a plate thickness of 0.4 to 1.5 mm, In the case of a normal metal plate for a terminal such as a beryllium copper plate, a = 0.30 mm ± 0.15 mm a ′ = 0.32 mm ± 0.15 mm m = 0.20 mm ± 0.05 mm k = 0.15 mm ± 0.15 mm The range of p = 1.00 mm ± 0.15 mm θ = 104-153 ° is used, and θ ′ in the present invention is 110
A range of ~ 130 ° is appropriate. If the angle is smaller than 110 °, the shearing force cannot be reduced almost without change from the normal angle θ, and if the obtuse angle is larger than 110 °,
The effect of increasing the wire holding force due to the wedge action cannot be expected.
【0013】図6は、図4において板厚0.5mmの黄銅
製の端子金具Tについて0.5sqの電線を圧着したとき
の電線保持力と圧着部抵抗を本発明品と従来品について
比較したものである。ただし、プレス荷重は2.5tで
あって、前記セレーションの寸法は、a=0.30mm,
a′=0.32mm,m=0.20mm,k=0.15mm,
p=1.0mm,θ=108゜,θ′=115゜であっ
た。図6から明らかなように、圧着部抵抗は両者間に殆
ど差はないが、電線保持力は従来品の110Nに対して
本発明品では130Nを記録し、18%強の上昇がみら
れた。
FIG. 6 shows a comparison between the present invention and the conventional product in terms of wire holding force and crimp resistance when a 0.5 sq wire is crimped on a brass terminal fitting T having a plate thickness of 0.5 mm in FIG. Things. However, the press load was 2.5 t, and the dimension of the serration was a = 0.30 mm,
a '= 0.32 mm, m = 0.20 mm, k = 0.15 mm,
p = 1.0 mm, θ = 108 °, θ ′ = 115 °. As is clear from FIG. 6, the resistance of the crimping portion is almost the same between the two, but the wire holding force is 130N in the present invention product compared to 110N in the conventional product, and a rise of more than 18% was observed. .
【0014】図7(A)、(B)と図8(A)、(B)
は、上記本発明品と従来品について、圧着前と圧着後の
セレーション部分の縦断面形状を示す顕微鏡写真の模式
図である。図7と図8の比較から明らかなように、中心
部と端部のセレーションの断面形状を変えた本発明品で
は、基板1と芯線8の伸びが3個のセレーション101
〜103 の各部で殆ど変わらないのに対して、従来品で
は基板1が中央のセレーション62 の両側で伸びが大き
く薄くなっており、基板1と芯線8の伸びに中央と端部
では大きなずれが生じることがわかる。
FIGS. 7A and 7B and FIGS. 8A and 8B
FIG. 3 is a schematic diagram of a micrograph showing a longitudinal cross-sectional shape of a serration portion before and after crimping of the product of the present invention and the conventional product. As is clear from the comparison between FIG. 7 and FIG. 8, in the product of the present invention in which the serrations at the center and the end are changed in cross section, the substrate 1 and the core wire 8 extend three serrations 10 1.
Whereas almost no change in the 10 3 of each part, in the conventional product is thinner large elongation on both sides the substrate 1 is in the center of serration 6 2, large at the center and the ends to the elongation of the substrate 1 and the core wire 8 It can be seen that a shift occurs.
【0015】[0015]
【発明の効果】以上説明したように、本発明によれば、
電線にダメージを与えずに端子金具の電線保持力を大巾
に強化することができ、電気的接続の信頼性が向上す
る。
As described above, according to the present invention,
The wire holding force of the terminal fitting can be greatly enhanced without damaging the wire, and the reliability of the electrical connection is improved.
【図面の簡単な説明】[Brief description of the drawings]
【図1】本発明の説明に供する端子金具試験品(サンプ
ル)の説明図である。
FIG. 1 is an explanatory diagram of a terminal fitting test sample (sample) used for describing the present invention.
【図2】図1のサンプルについての試験結果を示すグラ
フである。
FIG. 2 is a graph showing test results for the sample of FIG.
【図3】セレーションの断面形状と剪断力の説明図であ
る。
FIG. 3 is an explanatory view of a cross-sectional shape of a serration and a shearing force.
【図4】本発明の一具体例を示す端子金具の斜視図であ
る。
FIG. 4 is a perspective view of a terminal fitting showing a specific example of the present invention.
【図5】(A)、(B)はそれぞれ図4のセレーション
部分の要部拡大断面図である。
FIGS. 5A and 5B are enlarged cross-sectional views of main parts of a serration portion in FIG. 4;
【図6】本発明品と従来品の電線保持力と圧着部抵抗を
示すグラフである。
FIG. 6 is a graph showing the electric wire holding force and the resistance of the crimping part of the product of the present invention and the conventional product.
【図7】(A)、(B)はそれぞれ本発明品の電線圧着
前と圧着後のセレーション部分の模式断面図である。
FIGS. 7A and 7B are schematic cross-sectional views of a serration portion before and after crimping of an electric wire according to the present invention, respectively.
【図8】(A)、(B)はそれぞれ従来品の電線圧着前
と圧着後のセレーション部分の模式断面図である。
FIGS. 8A and 8B are schematic cross-sectional views of a serration portion of a conventional product before and after crimping of an electric wire, respectively.
【図9】従来の端子金具の一例を示す斜視図である。FIG. 9 is a perspective view showing an example of a conventional terminal fitting.
【図10】(A)、(B)はそれぞれ図9のセレーショ
ン部分の要部断面図である。
FIGS. 10A and 10B are cross-sectional views of main parts of a serration portion of FIG. 9;
【符号の説明】[Explanation of symbols]
T 端子金具 1 基板 2 電気接触部 3 電線圧着部 4 導体加締片 5 絶縁体加締片 10 セレーション 101 〜103 セレーション 11、11′ 角部 θ、θ′ 角度T terminal fitting 1 substrate 2 electrically contacting portion 32 wire crimping portion 4 conductor caulking pieces 5 insulator clamping pieces 10 serrations 10 1 to 10 3 serrations 11, 11 'corners theta, theta' angle

Claims (1)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 基板の前部に電気接触部を設け、後部に
    一対の導体加締片と一対の絶縁体加締片とを備える電線
    圧着部を設け、該一対の導体加締片の一方から他方にか
    けて内面に複数のセレーションを軸方向と直交して凹設
    して成る端子金具において、 前記複数のセレーションの中で中心部から離れた端部側
    のセレーションの断面形状が逆台形状でかつ外側の角部
    が内側の角部より大きな鈍角で左右非対称形に形成され
    ていることを特徴とする端子金具。
    An electric contact portion is provided at a front portion of a substrate, and a wire crimping portion including a pair of conductor caulking pieces and a pair of insulator caulking pieces is provided at a rear portion, and one of the pair of conductor caulking pieces is provided. A terminal fitting formed by recessing a plurality of serrations on the inner surface perpendicular to the axial direction from the other side, wherein the cross-sectional shape of the serration on the end side away from the center in the plurality of serrations is inverted trapezoidal and A terminal fitting characterized in that the outer corners are formed to be bilaterally asymmetric at an obtuse angle larger than the inner corners.
JP27807496A 1996-10-21 1996-10-21 Terminal fitting Expired - Fee Related JP3343880B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27807496A JP3343880B2 (en) 1996-10-21 1996-10-21 Terminal fitting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27807496A JP3343880B2 (en) 1996-10-21 1996-10-21 Terminal fitting

Publications (2)

Publication Number Publication Date
JPH10125362A true JPH10125362A (en) 1998-05-15
JP3343880B2 JP3343880B2 (en) 2002-11-11

Family

ID=17592293

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27807496A Expired - Fee Related JP3343880B2 (en) 1996-10-21 1996-10-21 Terminal fitting

Country Status (1)

Country Link
JP (1) JP3343880B2 (en)

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