JP6141817B2 - Terminal fitting and method of manufacturing terminal fitting - Google Patents

Terminal fitting and method of manufacturing terminal fitting Download PDF

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Publication number
JP6141817B2
JP6141817B2 JP2014234400A JP2014234400A JP6141817B2 JP 6141817 B2 JP6141817 B2 JP 6141817B2 JP 2014234400 A JP2014234400 A JP 2014234400A JP 2014234400 A JP2014234400 A JP 2014234400A JP 6141817 B2 JP6141817 B2 JP 6141817B2
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terminal
lance
terminal fitting
fitting
holding force
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JP2016100109A (en
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田口　直人
直人 田口
大成 金
大成 金
尚一 長坂
尚一 長坂
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Yazaki Corp
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Yazaki Corp
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Priority to JP2014234400A priority Critical patent/JP6141817B2/en
Priority to CN201510802075.6A priority patent/CN105609980B/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/639—Additional means for holding or locking coupling parts together, after engagement, e.g. separate keylock, retainer strap

Description

本発明は、端子収容室に片持ち状のランスが設けられるコネクタにおけるランスの自由端に係止する端子金具及びこの端子金具の製造方法に係り、特に端子収容室に収容された端子金具が該端子収容室から抜け出る方向に引っ張られた際に前記端子金具が前記端子収容室から抜け出ないようにする保持する力を向上することのできる端子金具及びこの端子金具の製造方法に関する。
The present invention relates to a terminal fitting to be engaged with a free end of a lance in a connector in which a cantilever lance is provided in a terminal accommodating chamber and a method for manufacturing the terminal fitting, and in particular, the terminal fitting accommodated in the terminal accommodating chamber includes the terminal fitting. The present invention relates to a terminal fitting that can improve the holding force that prevents the terminal fitting from coming out of the terminal receiving chamber when pulled in the direction of coming out of the terminal receiving chamber, and a method of manufacturing the terminal fitting .

従来の端子金具を端子収容室に保持させるコネクタは、特許文献１に示すように、端子金具を挿入可能なキャビティを有するハウジングを備え、このハウジングにおけるキャビティの内面に撓み変形可能なランスが形成されている。
このランスは、キャビティの内面から端子金具の挿入方向にほぼ沿うように延びるランス本体と、ランス本体の先端部からキャビティ内に突出する係止突部とからなっており、キャビティ内に端子金具が挿入されると、ランス本体の撓み動作を伴った後、係止突部が端子金具を抜け止め係止するようになっている。
そして、このコネクタでは、小型化によりランスの剛性が低下するため、端子金具を抜止めする機能の信頼性低下が懸念され、端子金具の下面に凹状に隆起するランス係合部が形成されている。 A conventional connector for holding a terminal fitting in a terminal accommodating chamber includes a housing having a cavity into which the terminal fitting can be inserted, and a lance that can be bent and deformed is formed on the inner surface of the cavity in the housing. ing.
This lance is composed of a lance body extending from the inner surface of the cavity so as to extend substantially along the insertion direction of the terminal fitting, and a locking projection protruding into the cavity from the tip of the lance body. When the lance body is inserted, the locking projection is configured to prevent the terminal fitting from coming off after being inserted.
In this connector, since the rigidity of the lance is reduced due to the downsizing, there is a concern that the reliability of the function of retaining the terminal fitting may be lowered, and a lance engaging portion that protrudes in a concave shape is formed on the lower surface of the terminal fitting. .

特開２０１１−１２４１７２号公報JP 2011-124172 A

このようなランス７０は、キャビティの内面から端子金具の挿入方向にほぼ沿うように延びるランス本体７１と、ランス本体７１からキャビティ内に突出する係止突部７２とからなる。ハウジングのキャビティ内に端子金具が挿入される過程でランス本体７１が撓み変形され、キャビティ内に端子金具が正規挿入されるに従ってランス本体７１が弾性復帰し、それに伴って係止突部７２が端子金具を抜け止め係止する。係止突部７２は、ランス本体７１よりも大きい幅寸法を有し、端子金具からのせん断力の作用方向に沿う部分を含むように配置されている。   Such a lance 70 includes a lance main body 71 extending from the inner surface of the cavity so as to substantially follow the insertion direction of the terminal fitting, and a locking projection 72 protruding from the lance main body 71 into the cavity. The lance main body 71 is bent and deformed in the process of inserting the terminal fitting into the cavity of the housing, and the lance main body 71 is elastically restored as the terminal fitting is properly inserted into the cavity. Lock and hold the bracket. The locking projection 72 has a larger width dimension than the lance main body 71 and is disposed so as to include a portion along the direction of application of the shearing force from the terminal fitting.

図１０には、従来の端子金具のランス係合部におけるコネクタハウジングのランスと当接する当接面の上端部の拡大図が示されている。
図１０において、従来の端子金具５０の端子接続部５１の底面部５２に、ランス係合部５３と、ランス嵌入孔５４と、が装備されている。
ランス係合部５３は、端子接続部５１の底面部５２から下方に隆起した構造で構成され、コネクタハウジング内のランスと係合することで、抜け止めを果たすようになっている。 FIG. 10 is an enlarged view of the upper end portion of the abutting surface that abuts the lance of the connector housing in the lance engaging portion of the conventional terminal fitting.
In FIG. 10, a lance engagement portion 53 and a lance insertion hole 54 are provided on the bottom surface portion 52 of the terminal connection portion 51 of the conventional terminal fitting 50.
The lance engagement portion 53 is configured to protrude downward from the bottom surface portion 52 of the terminal connection portion 51 and is configured to prevent the lance engagement by engaging with the lance in the connector housing.

また、端子接続部５１の底面部５２に形成されるランス嵌入孔５４は、ランス係合部５３に係合するコネクタハウジングの端子収容室に設けられたランスの外面側が没入可能な開口である。
端子接続部５１のランス係合部５３の上端部５５からランス嵌入孔５４の縁部５４ａの上端部にかけて、鋭角な角部５６が設けられている。
この鋭角な角部５６は、端子接続部５１の底面部５２の面とランス嵌入孔５４の先端側の端面５７とによって形成されている。 The lance insertion hole 54 formed in the bottom surface portion 52 of the terminal connection portion 51 is an opening in which the outer surface side of the lance provided in the terminal housing chamber of the connector housing that engages with the lance engagement portion 53 can be immersed.
An acute corner portion 56 is provided from the upper end portion 55 of the lance engagement portion 53 of the terminal connection portion 51 to the upper end portion of the edge portion 54a of the lance insertion hole 54.
The acute corner portion 56 is formed by the surface of the bottom surface portion 52 of the terminal connection portion 51 and the end surface 57 on the distal end side of the lance insertion hole 54.

このようなコネクタは、ワイヤーハーネスを自動車に装着後、修理及び／又は保全の際に端子金具を取り外しできるようになっている。このコネクタから端子金具に取り付けられたワイヤーハーネスを取り外しにあたって、ワイヤーハーネスを引っ張って端子収容室から離脱する際、端子係止部・端子圧着部、又は電線が破損・破断する荷重、所定の端子保持力が要求される。また、ワイヤーハーネスの搬送工程や組付け工程で、電線に過度の負荷がかかる場合があり、所定の端子保持力が要求される。   Such a connector can remove a terminal metal fitting at the time of repair and / or maintenance after attaching a wire harness to an automobile. When removing the wire harness attached to the terminal fitting from this connector, when pulling the wire harness away from the terminal housing chamber, the terminal locking part, terminal crimping part, or the load that damages or breaks the wire, holding the specified terminal Power is required. In addition, an excessive load may be applied to the electric wire in the wire harness conveyance process and the assembling process, and a predetermined terminal holding force is required.

本発明の目的は、上記した事情に鑑みてなされたもので、車両で使用されるワイヤーハーネス用のコネクタに要求される端子保持力を向上させる端子金具及びこの端子金具の製造方法を提供することにある。
The object of the present invention has been made in view of the above circumstances, and provides a terminal fitting that improves the terminal holding force required for a connector for a wire harness used in a vehicle and a method for manufacturing the terminal fitting. It is in.

上記課題を解決するためになされた請求項１記載の本発明の端子金具は、端子収容室に基端が片持ち状に支持されて弾性変形可能となるランスを備えるコネクタの前記端子収容室に挿入し前記ランスの自由端に係止する端子金具であって、前記端子金具のランス係合部と前記ランスの自由端との係止当接面を設け、前記係止当接面は、この上端部に、前記端子金具の端子接続部の底面部の面とランス嵌入孔の先端側の端面とによって形成される鋭角な角部を取り除いてなる端子保持力向上面を設けたことを特徴としている。
In order to solve the above-mentioned problems, the terminal fitting of the present invention according to claim 1 is provided in the terminal receiving chamber of the connector having a lance that is supported in a cantilevered manner in the terminal receiving chamber and is elastically deformable. A terminal fitting inserted and locked to the free end of the lance, wherein a locking contact surface between the lance engaging portion of the terminal fitting and the free end of the lance is provided, and the locking contact surface is The upper end portion is provided with a terminal holding force improving surface formed by removing a sharp corner formed by the surface of the bottom surface portion of the terminal connection portion of the terminal fitting and the end surface of the tip end side of the lance insertion hole. Yes.

本願請求項１に記載の発明によれば、端子金具のランス嵌入孔の縁部とランスの自由端との当接面の上部エッジに端子保持力向上面を設けているため、端子金具の端子接続部のランス嵌入孔とランスとの当接面のランス嵌入孔の上部エッジの鋭利な角部が取れた状態になっている。このため、端子金具の端子接続部のランス嵌入孔とランスとの当接面のランス嵌入孔の上部エッジによってランスの自由端を削り取ることが無くなり、所定の破断荷重（例えば、車両で使用されるワイヤハーネス用のコネクタに要求される端子保持力）を向上できる。
According to the first aspect of the present invention, since the terminal holding force improving surface is provided on the upper edge of the contact surface between the edge of the lance insertion hole of the terminal metal fitting and the free end of the lance, the terminal of the terminal metal fitting is provided. The sharp corners of the upper edge of the lance insertion hole on the contact surface between the lance insertion hole of the connecting portion and the lance are removed. For this reason, the free edge of the lance is not scraped off by the upper edge of the lance insertion hole in the contact surface between the lance insertion hole of the terminal fitting portion of the terminal fitting and the lance, and a predetermined breaking load (for example, used in a vehicle) terminal holding force required to connectors for wire harnesses) can be improved.

上記課題を解決するためになされた請求項２記載の本発明の端子金具は、請求項１に記載の端子金具の端子保持力向上面を、ランス係合部の上端部に形成する微小なＲ面で構成したことを特徴としている。
本願請求項２に記載の発明によれば、端子金具のランス係合部とランスの自由端との係止当接面の上端部にランス係合部の上端部に形成する微小なＲ面を設けてあるため、車両で使用されるワイヤハーネス用のコネクタに要求される端子保持力を向上できる。
The terminal fitting of the present invention according to claim 2, which has been made to solve the above-mentioned problems, has a small R which forms the terminal holding force improving surface of the terminal fitting according to claim 1 at the upper end portion of the lance engaging portion. It is characterized by having a surface.
According to the second aspect of the present invention, the minute R surface formed on the upper end portion of the lance engaging portion is formed on the upper end portion of the locking contact surface between the lance engaging portion of the terminal fitting and the free end of the lance. Since it is provided, the terminal holding force required for the connector for the wire harness used in the vehicle can be improved.

上記課題を解決するためになされた請求項３記載の本発明の端子金具は、請求項１に記載の端子金具の端子保持力向上面を、ランス係合部の上端部に形成する微小な面取り構成したことを特徴としている。
本願請求項３に記載の発明によれば、端子金具のランス係合部とランスの自由端との係止当接面の上端部にランス係合部の上端部に形成する微小な面取りを設けてあるため、車両で使用されるワイヤハーネス用のコネクタに要求される端子保持力を向上できる。
 The terminal fitting of the present invention according to claim 3, which has been made to solve the above-mentioned problems, has a small chamfering that forms the terminal holding force improving surface of the terminal fitting according to claim 1 at the upper end portion of the lance engaging portion. It is characterized by the construction.
According to the third aspect of the present invention, the minute chamfer formed on the upper end portion of the lance engaging portion is provided at the upper end portion of the locking contact surface between the lance engaging portion of the terminal fitting and the free end of the lance. Therefore, the terminal holding force required for the connector for the wire harness used in the vehicle can be improved.

上記課題を解決するためになされた請求項４記載の本発明の端子金具の製造方法は、端子収容室に基端が片持ち状に支持されて弾性変形可能となるランスを備えるコネクタの前記端子収容室に挿入し前記ランスの自由端に係止する端子金具の製造方法であって、前記端子金具のランス嵌入孔の打ち抜き形成によって前記端子金具のランス係合部と前記ランスの自由端との係止当接面を形成する工程と、前記ランス嵌入孔の打ち抜き時又は該打ち抜き後に、前記端子金具の端子接続部の底面部の面と前記ランス嵌入孔の先端側の端面とによって形成される鋭角な角部を打ち抜き用の金型と別途の金型で押圧して前記角部にＲ面を形成する又は面取りを施して端子保持力向上面を設ける工程と、を含むことを特徴としている。
The terminal metal fitting manufacturing method according to claim 4, which has been made in order to solve the above-described problems, includes a lance that has a base end that is cantilevered in a terminal accommodating chamber and is elastically deformable. A method of manufacturing a terminal fitting that is inserted into a storage chamber and locked to a free end of the lance, wherein a lance engaging portion of the terminal fitting and a free end of the lance are formed by punching a lance insertion hole of the terminal fitting. It is formed by the step of forming the locking contact surface, and the surface of the bottom surface portion of the terminal connection portion of the terminal fitting and the end surface on the tip side of the lance insertion hole at the time of or after the punching of the lance insertion hole. And a step of pressing an acute corner with a die for punching and a separate mold to form an R surface at the corner or chamfering to provide a terminal holding force improving surface . .

本願請求項４に記載の発明によれば、端子金具のランス嵌入孔の縁部とランスの自由端との当接面の上部エッジに端子保持力向上面が形成されるため、端子金具の端子接続部のランス嵌入孔とランスとの当接面のランス嵌入孔の上部エッジの鋭利な角部が取れた状態になる。このため、端子金具の端子接続部のランス嵌入孔とランスとの当接面のランス嵌入孔の上部エッジによってランスの自由端を削り取ることが無くなり、所定の破断荷重（例えば、車両で使用されるワイヤハーネス用のコネクタに要求される端子保持力）を向上できる。
According to the fourth aspect of the present invention , the terminal holding force improving surface is formed on the upper edge of the contact surface between the edge of the lance insertion hole of the terminal fitting and the free end of the lance. A sharp corner of the upper edge of the lance insertion hole on the contact surface between the lance insertion hole of the connecting portion and the lance is removed. For this reason, the free edge of the lance is not scraped off by the upper edge of the lance insertion hole in the contact surface between the lance insertion hole of the terminal fitting portion of the terminal fitting and the lance, and a predetermined breaking load (for example, used in a vehicle) terminal holding force required to connectors for wire harnesses) can be improved.

本発明によれば、車両で使用されるワイヤーハーネス用のコネクタに要求される端子保持力を向上することができる。   ADVANTAGE OF THE INVENTION According to this invention, the terminal holding force requested | required of the connector for wire harnesses used with a vehicle can be improved.

本発明に係る端子金具を装着するコネクタの全体斜視図である。1 is an overall perspective view of a connector to which a terminal fitting according to the present invention is attached. 図１に図示の端子金具の下面側から見た斜視図である。It is the perspective view seen from the lower surface side of the terminal metal fitting shown in FIG. 図２のＡ部で示す端子金具のランス係合部の拡大斜視図である。It is an expansion perspective view of the lance engagement part of the terminal metal fitting shown by the A section of FIG. 図３に図示の端子金具のランス係合部に形成される端子保持力向上面の実施例を示す断面図である。It is sectional drawing which shows the Example of the terminal retention strength improvement surface formed in the lance engagement part of the terminal metal fitting shown in FIG. 図２に図示の端子金具を装着するコネクタハウジングの全体斜視図である。It is a whole perspective view of the connector housing which mounts the terminal metal fitting shown in FIG. 図５に図示のコネクタハウジングに端子金具を装着した状態を示す断面図である。It is sectional drawing which shows the state which attached the terminal metal fitting to the connector housing shown in FIG. コネクタハウジングから端子金具を抜き出しランスが破断した状態を示す図である。It is a figure which shows the state which extracted the terminal metal fitting from the connector housing and fracture | ruptured the lance. 図６に図示のコネクタハウジングに図３に図示のランス係合部に端子保持力向上面が形成された端子金具を装着した状態で端子金具を引き抜いた際のランスの破断面の状態を示す図である。6 is a diagram showing a state of a fracture surface of the lance when the terminal fitting is pulled out with the terminal fitting having the terminal holding force improving surface formed on the lance engaging portion shown in FIG. 3 attached to the connector housing shown in FIG. It is. 本発明に係る端子金具の別な実施例の下面側から見た斜視図である。It is the perspective view seen from the lower surface side of another Example of the terminal metal fitting which concerns on this invention. 従来の端子金具のランス係合部のランスとの当接面の上端部を示す拡大図である。It is an enlarged view which shows the upper end part of the contact surface with the lance of the lance engagement part of the conventional terminal metal fitting. コネクタハウジングにランス係合部に端子保持力向上面を形成していない従来の端子金具を装着した状態で端子金具を引き抜いた際のランスの破断面の状態を示す図である。It is a figure which shows the state of the torn surface of a lance at the time of pulling out a terminal metal fitting in the state which attached the conventional terminal metal fitting which does not form the terminal holding force improvement surface in the lance engagement part in a connector housing.

以下、本発明の実施例について図面を用いて説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図１〜図４には、本発明に係る端子金具の実施例が示されている。
図１は本発明に係る端子金具を装着するコネクタの全体斜視図、図２は図１に図示の端子金具の下面側から見た斜視図、図３は図２に図示の端子金具のＡ部の拡大斜視図、図４は図３に図示の端子金具のランス係合部に形成される端子保持力向上面の実施例を示す断面図である。 1 to 4 show an embodiment of a terminal fitting according to the present invention.
1 is an overall perspective view of a connector to which a terminal fitting according to the present invention is attached, FIG. 2 is a perspective view seen from the lower surface side of the terminal fitting shown in FIG. 1, and FIG. 3 is a portion A of the terminal fitting shown in FIG. FIG. 4 is a cross-sectional view showing an embodiment of a terminal holding force improving surface formed in the lance engaging portion of the terminal fitting shown in FIG.

図１において、端子金具１は、合成樹脂製のコネクタハウジング２の端子収容室３に収容されるようになっている。
端子金具１は、金属板のプレス成形品で、雌端子金具で構成されている。この端子金具１は、電線４の端末に接続されており、端子金具１の前部には、端子接続部５が形成されている。この端子金具１の前部に設けられている端子接続部５は、前後方向に開口する角筒状をなしており、その前端開口６を通して、雄端子（図示略）の舌片状の端子先端部が角筒状の端子嵌合部５の内部に嵌合可能に構成されている。 In FIG. 1, a terminal fitting 1 is accommodated in a terminal accommodating chamber 3 of a connector housing 2 made of synthetic resin.
The terminal fitting 1 is a press-formed product of a metal plate, and is composed of a female terminal fitting. The terminal fitting 1 is connected to the end of the electric wire 4, and a terminal connection portion 5 is formed at the front portion of the terminal fitting 1. The terminal connection portion 5 provided at the front portion of the terminal fitting 1 has a rectangular tube shape that opens in the front-rear direction, and through the front end opening 6, a tongue-shaped terminal tip of a male terminal (not shown). The portion is configured to be fitted inside the rectangular tube-shaped terminal fitting portion 5.

また、端子金具１の後部には、電線４の端末に接続する電線接続部７が設けられている。この電線接続部７は、電線４の端末にて絶縁被覆４ａが皮剥ぎされることで露出された芯線４ｂに圧着されるワイヤバレル部８と、皮剥ぎされることで残された絶縁被覆４ａの端末に加締められるインシュレーションバレル部９とからなっている。   Further, at the rear part of the terminal fitting 1, an electric wire connecting part 7 connected to the end of the electric wire 4 is provided. The wire connection portion 7 includes a wire barrel portion 8 that is crimped to the core wire 4b exposed by peeling off the insulation coating 4a at the end of the wire 4, and an insulation coating 4a left after peeling. The insulation barrel portion 9 is crimped to the terminal.

ワイヤバレル部８は、オープンバレル形式の一対の圧着片８ａ、８ａを有しており、両圧着片８ａ、８ａを芯線４ｂの左右両側から包み込むように圧着することで、芯線４ｂに固着されている。
インシュレーションバレル部９は、ワイヤバレル部８よりも一回り大きめに形成され、特に上下寸法がワイヤバレル部８より大きめに形成されている。このインシュレーションバレル部９は、オープンバレル形式の一対の加締片９ａを有しており、絶縁被覆４ａの残された部分の端末を左右両側から包み込むように加締めることで、電線４に固着されている。 The wire barrel portion 8 has a pair of crimping pieces 8a and 8a in the form of an open barrel, and is fixed to the core wire 4b by crimping both the crimping pieces 8a and 8a so as to be wrapped from the left and right sides of the core wire 4b. Yes.
The insulation barrel portion 9 is formed slightly larger than the wire barrel portion 8, and in particular, the vertical dimension is formed larger than the wire barrel portion 8. The insulation barrel portion 9 has a pair of open barrel-type crimping pieces 9a, and is secured to the electric wire 4 by crimping so that the ends of the remaining portions of the insulating coating 4a are wrapped from both the left and right sides. Has been.

また、端子金具１には、図２に示すように、端子接続部５の底面部１０に、ランス係合部１１と、ランス嵌入孔１２と、が装備されている。
ランス係合部１１は、端子接続部５の底面部１０から下方に隆起した構造で構成され、コネクタハウジング２内のランス２０と係合することで、抜け止めを果たすようになっている。
また、端子接続部５の底面部１０に形成されるランス嵌入孔１２は、ランス係合部１１に係合するコネクタハウジング２の端子収容室３に設けられたランス２０の外面側が没入可能な開口である。 Further, as shown in FIG. 2, the terminal fitting 1 is equipped with a lance engagement portion 11 and a lance insertion hole 12 on the bottom surface portion 10 of the terminal connection portion 5.
The lance engaging portion 11 has a structure that protrudes downward from the bottom surface portion 10 of the terminal connecting portion 5, and engages with the lance 20 in the connector housing 2 to prevent the lance engaging portion 11 from coming off.
The lance insertion hole 12 formed in the bottom surface portion 10 of the terminal connection portion 5 is an opening in which the outer surface side of the lance 20 provided in the terminal housing chamber 3 of the connector housing 2 engaged with the lance engagement portion 11 can be immersed. It is.

端子接続部５のランス係合部１１の上端部１３からランス嵌入孔１２の縁部１２ａの上端部にかけて、図３に示す如き端子保持力向上面１４が設けられている。
この端子保持力向上面１４は、端子接続部５の底面部１０の面とランス嵌入孔１２の先端側の端面１５とによって形成される鋭角な角部を取り除きランス２０に食い込むことのないなだらかな形状の面に形成されている。 A terminal holding force improving surface 14 as shown in FIG. 3 is provided from the upper end portion 13 of the lance engagement portion 11 of the terminal connection portion 5 to the upper end portion of the edge portion 12a of the lance insertion hole 12.
The terminal holding force improving surface 14 is a gentle surface that removes an acute corner formed by the surface of the bottom surface portion 10 of the terminal connection portion 5 and the end surface 15 on the distal end side of the lance insertion hole 12 and does not bite into the lance 20. It is formed on the shape surface.

この端子保持力向上面１４は、具体的には、図４（Ａ）に示すように、端子接続部５の底面部１０の面と、ランス嵌入孔１２の先端側の端面１５とによって形成される鋭角な角部に微小なＲ面１４ａを形成して構成されている。
また、端子保持力向上面１４は、図４（Ｂ）に示すように、端子接続部５の底面部１０の面と、ランス嵌入孔１２の先端側の端面１５とによって形成される鋭角な角部に、所定角度で鋭角な角部を切り落とす微小な面取り１４ｂを施して構成してもよい。
このようなＲ面や面取りは、ランス嵌入孔１２を形成する打ち抜き工程後、打ち抜き用の金型と別途の金型で押圧して形成したり、打ち抜き工程時に形成してもよい。 Specifically, as shown in FIG. 4A, the terminal holding force improving surface 14 is formed by a surface of the bottom surface portion 10 of the terminal connection portion 5 and an end surface 15 on the distal end side of the lance insertion hole 12. A small R surface 14a is formed at an acute corner.
Further, as shown in FIG. 4B, the terminal holding force improving surface 14 is an acute angle formed by the surface of the bottom surface portion 10 of the terminal connection portion 5 and the end surface 15 on the distal end side of the lance insertion hole 12. A small chamfer 14b that cuts off a sharp corner at a predetermined angle may be applied to the portion.
Such R surface or chamfering may be formed by pressing with a die for punching and a separate die after the punching step for forming the lance insertion hole 12, or may be formed at the time of the punching step.

コネクタハウジング２は、図５、図６に示すように、端子金具１を保持する端子収容部３と、端子収容部３の上面に装備されたロックアーム２１と、を有している。
ロックアーム２１は、端子収容部３の上面（外面）に、相手側コネクタと嵌合した際にコネクタハウジング同士をロックする係止凸部２２を有している。
また、端子収容部３は、端子金具１を収容する端子収容孔２３と、雄端子を挿入する雄端子挿入孔２４とを有している。 As shown in FIGS. 5 and 6, the connector housing 2 includes a terminal accommodating portion 3 that holds the terminal fitting 1, and a lock arm 21 provided on the upper surface of the terminal accommodating portion 3.
The lock arm 21 has a locking projection 22 on the upper surface (outer surface) of the terminal accommodating portion 3 that locks the connector housings when fitted to the mating connector.
Moreover, the terminal accommodating part 3 has the terminal accommodating hole 23 which accommodates the terminal metal fitting 1, and the male terminal insertion hole 24 which inserts a male terminal.

端子収容室３の下壁２５の内面には、可撓性のランス２０が一体に形成されている。このランス２０は、後端の固定端２０ａが端子収容室３の下壁２５に対して結合され、前端の自由端２０ｂが前方斜め上方に延びる片持形状となっている。
また、このランス２０は、ランス２０の自由端２０ｂと端子収容室３の下壁２５との間に撓みスペース２６が形成されている。そして、ランス２０は、可撓性を有してこのランス２０の下方に設けられる撓みスペース２６内で撓むように形成されている（下方に撓み、下方に撓んだ状態から上方に復元する）。 A flexible lance 20 is integrally formed on the inner surface of the lower wall 25 of the terminal accommodating chamber 3. The lance 20 has a cantilever shape in which the fixed end 20a at the rear end is coupled to the lower wall 25 of the terminal accommodating chamber 3, and the free end 20b at the front end extends obliquely upward and forward.
Further, the lance 20 has a bending space 26 formed between the free end 20 b of the lance 20 and the lower wall 25 of the terminal accommodating chamber 3. The lance 20 has flexibility and is formed to bend in a bending space 26 provided below the lance 20 (bends downward and restores upward from the bent state).

そして、ランス２０の自由端２０ｂには、端子金具１のランス係合部１１に係合することで、端子金具１が後方へ抜け止めするのを防止する端子係止部２０ｃが設けられている。
また、ランス２０は、ランス上面２７の端子係止部２０ｃにて端子金具１を係止する機能を有するとともに、端子係止部２０ｃの反対側では、ランス２０の下側の端子収容室３に収容される端子金具１を案内し、且つ支持する機能を有している。 The free end 20b of the lance 20 is provided with a terminal locking portion 20c that prevents the terminal fitting 1 from being pulled out backward by engaging with the lance engaging portion 11 of the terminal fitting 1. .
The lance 20 has a function of locking the terminal fitting 1 at the terminal locking portion 20c of the lance upper surface 27, and in the terminal receiving chamber 3 below the lance 20 on the opposite side of the terminal locking portion 20c. It has a function of guiding and supporting the terminal fitting 1 to be accommodated.

このように構成されるコネクタハウジング２に端子金具１を収容するには、まず、図１に示すように、端子金具１をコネクタハウジング２の端子収容室３の端子収容孔２３の後方に配置する。そして、この状態から真っ直ぐ端子収容室３の端子収容孔２３の前方へ移動して図５，図６に示すように、端子収容孔２３に端子金具１を挿入していく。
端子収容孔２３を介して端子収容室３に挿入された端子金具１は、端子接続部５のランス係合部１１がランス２０の端子係止部２０ｃに当接する。さらに端子金具１の挿入を続けると、ランス２０の端子係止部２０ｃの上方にランス２０の撓みスペース２６が存在することから、端子金具１は若干上方へ傾きながら前方へ移動する（あたかも斜め挿入の状態で移動する）。
このとき、端子金具１は、端子接続部５のランス係合部１１がランス２０の端子係止部２０ｃの斜面を摺動してランス２０を下方へ撓ませるとともに、前方へ案内される。 In order to accommodate the terminal fitting 1 in the connector housing 2 configured as described above, first, as shown in FIG. 1, the terminal fitting 1 is disposed behind the terminal accommodating hole 23 of the terminal accommodating chamber 3 of the connector housing 2. . Then, the terminal fitting 1 is moved straight from this state to the front of the terminal accommodation hole 23 of the terminal accommodation chamber 3 and the terminal fitting 1 is inserted into the terminal accommodation hole 23 as shown in FIGS.
In the terminal fitting 1 inserted into the terminal accommodating chamber 3 through the terminal accommodating hole 23, the lance engaging portion 11 of the terminal connecting portion 5 abuts on the terminal locking portion 20 c of the lance 20. When the insertion of the terminal fitting 1 is continued, the bending space 26 of the lance 20 exists above the terminal locking portion 20c of the lance 20, so that the terminal fitting 1 moves forward while tilting slightly upward (as if obliquely inserted). To move on).
At this time, the terminal fitting 1 is guided forward while the lance engaging portion 11 of the terminal connecting portion 5 slides on the slope of the terminal locking portion 20c of the lance 20 to bend the lance 20 downward.

さらに端子金具１の挿入を続けると、端子金具１は、端子接続部５の前端がランス２０を摺動し、これにより前方へ案内される。そして、端子金具１の傾きが元の状態に戻り、端子接続部５の前端がコネクタハウジング２の前壁２８の内面に当接すると、それまで下方に撓んでいたランス２０は元の状態に復元する。これにより、ランス２０の端子係止部２０ｃの係止面が端子金具１のランス係合部１１に引っ掛かり、ランス２０がランス嵌入孔１２に装着され、端子金具１は係止される。
このようにして、端子金具１は、前部隔壁として機能するランス２０と、コネクタハウジング２の上壁２９とによって支持される。 When the terminal fitting 1 is further inserted, the front end of the terminal connecting portion 5 slides on the lance 20 and is thereby guided forward. Then, when the inclination of the terminal fitting 1 returns to the original state and the front end of the terminal connection portion 5 comes into contact with the inner surface of the front wall 28 of the connector housing 2, the lance 20 that has been bent downward until then is restored to the original state. To do. Thereby, the locking surface of the terminal locking part 20c of the lance 20 is hooked on the lance engaging part 11 of the terminal metal fitting 1, the lance 20 is mounted in the lance insertion hole 12, and the terminal metal fitting 1 is locked.
In this way, the terminal fitting 1 is supported by the lance 20 that functions as a front partition and the upper wall 29 of the connector housing 2.

図６に示すように端子金具１をコネクタハウジング２の端子収容室３に収容して取り付けた後、自動車に装着後、修理及び／又は保全の際、端子金具１が接続されたワイヤーハーネスの端子金具を取り外す場合がある。
このような場合、ワイヤーハーネスの電線部分を持ってコネクタハウジング２の端子収容室３から引き抜くわけであるが、この場合、所定の端子保持力を有することが要求される。
また、ワイヤーハーネスの搬送工程や組付け工程で、電線に過度の負荷がかかる場合があるため、所定の端子保持力が要求される。 As shown in FIG. 6, after the terminal fitting 1 is accommodated and attached in the terminal accommodating chamber 3 of the connector housing 2, it is attached to the automobile and then repaired and / or maintained, the terminal of the wire harness to which the terminal fitting 1 is connected. The bracket may be removed.
In such a case, the electric wire portion of the wire harness is held and pulled out from the terminal accommodating chamber 3 of the connector housing 2. In this case, it is required to have a predetermined terminal holding force.
Moreover, since an excessive load may be applied to the electric wires in the wire harness conveyance process and assembly process, a predetermined terminal holding force is required.

図６に図示の端子金具１は、ランス２０の端子係止部２０ｃの係止面を端子金具１のランス係合部１１に引っ掛かけて、ランス２０をランス嵌入孔１２に嵌合して、コネクタハウジング２の端子収容室３に収容して取り付ける。
このコネクタハウジング２の端子収容室３に端子金具１を取り付けた状態で、ワイヤーハーネスの電線部分を持ってコネクタハウジング２の端子収容室３から端子金具１を引き抜く。 The terminal fitting 1 shown in FIG. 6 is configured such that the locking surface of the terminal locking portion 20 c of the lance 20 is hooked on the lance engaging portion 11 of the terminal fitting 1 and the lance 20 is fitted into the lance insertion hole 12. The connector housing 2 is housed and attached in the terminal housing chamber 3.
With the terminal fitting 1 attached to the terminal housing chamber 3 of the connector housing 2, the terminal fitting 1 is pulled out of the terminal housing chamber 3 of the connector housing 2 while holding the wire portion of the wire harness.

この端子接続部５のランス嵌入孔１２にランス２０が装着されている状態で端子保持力向上面１４が形成されている端子金具１を引き抜いて、ランス２０が破断して引き抜かれたときの破断荷重によって端子保持力を判断している。
すなわち、端子接続部５のランス嵌入孔１２にランス２０が装着されている状態で、端子金具１を引き抜く方向に荷重を掛けていくと、当初、端子保持力によって端子金具１は、引き抜かれること無く維持される。
Pull the terminal fitting 1 terminal retention improvement surface 14 is formed in a state where the lance 20 is attached to the lance insertion hole 12 of the terminal connection unit 5, breaking when the lance 20 is pulled by broken The terminal holding force is judged by the load.
That is, when a load is applied in the direction in which the terminal fitting 1 is pulled out in a state where the lance 20 is mounted in the lance insertion hole 12 of the terminal connecting portion 5, the terminal fitting 1 is initially pulled out by the terminal holding force. It is maintained without.

その後、端子金具１を引き抜く方向に荷重を上げていき、限界まで来ると、端子金具１のランス嵌入孔１２の端子保持力向上面１４によってランス２０は、図７に示す如く破断される。
このランス２０が破断されたときの破断荷重の大きさで端子保持力が測定される。
この端子金具１のランス嵌入孔１２の端子保持力向上面１４によって破断された状態のランス２０の破断面の状態が図８に示されている。 Thereafter, the load is increased in the direction in which the terminal fitting 1 is pulled out, and when the limit is reached, the lance 20 is broken by the terminal holding force improving surface 14 of the lance insertion hole 12 of the terminal fitting 1 as shown in FIG.
The terminal holding force is measured by the magnitude of the breaking load when the lance 20 is broken.
FIG. 8 shows a state of the fracture surface of the lance 20 in a state of being broken by the terminal holding force improving surface 14 of the lance insertion hole 12 of the terminal fitting 1.

本実施例に係る端子金具１について端子保持力の測定を行うと、例えば、車両で使用されるワイヤハーネス用のコネクタに要求される所定の破断荷重値を満足できる。   When the terminal holding force is measured for the terminal fitting 1 according to the present embodiment, for example, a predetermined breaking load value required for a wire harness connector used in a vehicle can be satisfied.

一方、図１０に図示の端子金具５０の端子接続部５１のランス係合部５３の上端部５５とランス嵌入孔５４の縁部５４ａの上端部に端子保持力向上面を形成されていない端子金具５０を、ランス２０の端子係止部２０ｃの係止面を端子金具５０のランス係合部５３に引っ掛かけて、ランス２０をランス嵌入孔５４に嵌合して、コネクタハウジング２の端子収容室３に収容して取り付ける。
このコネクタハウジング２の端子収容室３に端子金具５０を取り付けた状態で、ワイヤーハーネスの電線部分を持ってコネクタハウジング２の端子収容室３から端子金具５０を引き抜く。 On the other hand, the terminal metal fitting in which the terminal holding force improvement surface is not formed in the upper end part 55 of the lance engagement part 53 of the terminal connection part 51 of the terminal metal fitting 50 shown in FIG. 10 and the upper end part of the edge part 54a of the lance insertion hole 54. 50 is hooked on the lance engaging portion 53 of the terminal fitting 50 by engaging the engaging surface of the terminal engaging portion 20c of the lance 20, and the lance 20 is fitted into the lance insertion hole 54, so that the terminal housing of the connector housing 2 is accommodated. Housed in chamber 3 and attached.
With the terminal fitting 50 attached to the terminal housing chamber 3 of the connector housing 2, the terminal fitting 50 is pulled out from the terminal housing chamber 3 of the connector housing 2 while holding the wire portion of the wire harness.

すなわち、端子金具５０の端子接続部５１のランス嵌入孔５４にランス２０が装着されている状態で、端子金具１を引き抜く方向に荷重を掛けていくと、当初、端子保持力によって端子金具５０は、引き抜かれること無く維持される。
この端子金具５０を引き抜いくときに、端子金具５０の端子接続部５１の底面部５２から下方に隆起して形成されるランス係合部５３の上端部５５からランス嵌入孔５４の縁部５４ａの上端部にかけて、形成されている鋭角な角部５６によってランス２０は、図７に示す如く破断される。 That is, when a load is applied in a direction in which the terminal fitting 1 is pulled out in a state where the lance 20 is mounted in the lance insertion hole 54 of the terminal connection portion 51 of the terminal fitting 50, the terminal fitting 50 is initially loaded by the terminal holding force. Maintained without being pulled out.
When the terminal fitting 50 is pulled out, the edge 54 a of the lance insertion hole 54 extends from the upper end portion 55 of the lance engaging portion 53 formed to protrude downward from the bottom surface portion 52 of the terminal connection portion 51 of the terminal fitting 50. The lance 20 is broken as shown in FIG. 7 by the sharp corner portion 56 formed over the upper end portion.

この端子金具５０のランス嵌入孔５４の鋭角な角部５６によって破断された状態のランス２０の破断面の状態が図１１に示されている。
この従来の端子金具５０の端子接続部５１の鋭角な角部５６によってランス２０が破断されたときの破断荷重の大きさで端子保持力が測定される。 FIG. 11 shows a state of a fracture surface of the lance 20 in a state of being broken by the acute corner portion 56 of the lance insertion hole 54 of the terminal fitting 50.
The terminal holding force is measured by the magnitude of the breaking load when the lance 20 is broken by the acute corner portion 56 of the terminal connection portion 51 of the conventional terminal fitting 50.

従来の端子金具５０について端子保持力の測定を行うと、車両で使用されるワイヤハーネス用のコネクタに要求される所定の破断荷重値を下回る場合が生じる。   When the terminal holding force of the conventional terminal fitting 50 is measured, there may be a case where it falls below a predetermined breaking load value required for a wire harness connector used in a vehicle.

この図８に示される本発明に係る端子金具１のランス係合部１１の端子保持力向上面１４によって破断された状態のランス２０の破断面の状態を示す図と、図１１に示される従来の端子金具５０の端子接続部５１のランス係合部５３の上端部５５からランス嵌入孔５４の縁部５４ａの上端部にかけて、形成されている鋭角な角部５６によって破断された状態のランス２０の破断面の状態を示す図とを比較すると、図１１に示される従来の端子金具５０の鋭角な角部５６によるランス２０の破断面は、鋭い刃物で切り裂いたように破断面の表面が綺麗な面の形状となっている。
すなわち、図１１に示される従来の端子金具５０の鋭角な角部５６によるランス２０の破断面は、端子金具５０の鋭角な角部５６が当接した後、さほど切り裂き力を要すること無く切り裂かれていることが分かる。 The figure which shows the state of the torn surface of the lance 20 of the state fractured | ruptured by the terminal holding force improvement surface 14 of the lance engagement part 11 of the terminal metal fitting 1 which concerns on this invention shown in this FIG. 8, and the conventional art shown in FIG. From the upper end 55 of the lance engaging portion 53 of the terminal connection portion 51 of the terminal fitting 50 to the upper end of the edge portion 54a of the lance insertion hole 54, the lance 20 is broken by an acute corner portion 56 formed. 11 is compared with the figure showing the state of the fracture surface of the lance 20, the fracture surface of the lance 20 by the sharp corner portion 56 of the conventional terminal fitting 50 shown in FIG. It has a flat surface shape.
That is, the fracture surface of the lance 20 by the sharp corner portion 56 of the conventional terminal fitting 50 shown in FIG. 11 is torn without requiring much cutting force after the sharp corner portion 56 of the terminal fitting 50 abuts. I understand that

これに対し、図８に示される本発明に係る端子金具１の端子保持力向上面１４によるランス２０の破断面は、鋭い刃物で切り裂いたような破断面ではなく、ランス２０を無理矢理破断したように、破断面の表面に凹凸が生じているのが分かる。
すなわち、図８に示される本発明に係る端子金具１の端子保持力向上面１４によるランス２０の破断面からは、端子金具１の端子保持力向上面１４が当接した後、端子保持力向上面１４でランス２０を押圧し、ランス２０を引き千切るように破断面の表面に凹凸が生じているが分かる。
したがって、図８に示される本発明に係る端子金具１の場合、従来の端子金具５０の鋭角な角部５６によってランス２０を破断する破断荷重よりも大きな破断荷重で破断されていることが分かる。 On the other hand, the fracture surface of the lance 20 by the terminal holding force improving surface 14 of the terminal fitting 1 according to the present invention shown in FIG. 8 is not a fracture surface that is cut by a sharp blade, but the lance 20 is forcibly broken. In addition, it can be seen that the surface of the fracture surface is uneven.
That is, from the fracture surface of the lance 20 by the terminal holding force improving surface 14 of the terminal fitting 1 according to the present invention shown in FIG. 8, after the terminal holding force improving surface 14 of the terminal fitting 1 comes into contact, the terminal holding force is improved. It can be seen that the lance 20 is pressed by the surface 14 and the surface of the fractured surface is uneven so that the lance 20 is broken.
Therefore, in the case of the terminal fitting 1 according to the present invention shown in FIG. 8, it can be seen that it is broken at a breaking load larger than the breaking load that breaks the lance 20 by the sharp corners 56 of the conventional terminal fitting 50.

図１０に図示の従来の端子金具のランス係合部によってランス２０を破断したときの端子保持力は、車両で使用されるワイヤハーネス用のコネクタに要求される所定の破断荷重値をを下回るおそれがある。これに対し、本実施例によれば、所定の破断荷重値を充分に満たすことができる。   The terminal holding force when the lance 20 is broken by the lance engaging portion of the conventional terminal fitting shown in FIG. 10 may be less than a predetermined breaking load value required for a wire harness connector used in a vehicle. There is. On the other hand, according to the present embodiment, the predetermined breaking load value can be sufficiently satisfied.

図９には、本発明に係る端子金具の別な実施例が示されている。
本実施例が図１〜図４に図示の実施例と異なる点は、本発明に係る端子金具が雄端子金具によって構成されている点である。 FIG. 9 shows another embodiment of the terminal fitting according to the present invention.
This embodiment differs from the embodiment shown in FIGS. 1 to 4 in that the terminal fitting according to the present invention is constituted by a male terminal fitting.

図９において、端子金具３０は、金属板のプレス成形品で、舌片状の端子先端部３１と、端子先端部３１の基端に連なる角筒状の端子中間部３２と、電線４０の芯線を圧着するワイヤバレル部３３と、電線４０の被覆部の上に加締め付けられて電線４０を固定するインシュレーションバレル部３４と、を備えている。
また、端子中間部３２の底面部３２ａは、雌端子金具で構成される端子金具１の端子接続部５の底面部１０と同様の構造で、ランス係合部３５と、ランス嵌入孔３６と、が装備されている。 In FIG. 9, the terminal fitting 30 is a press-formed product of a metal plate, and is a tongue-shaped terminal tip portion 31, a rectangular tube-shaped terminal intermediate portion 32 connected to the base end of the terminal tip portion 31, and a core wire of the electric wire 40. The wire barrel part 33 which crimps | crimps and the insulation barrel part 34 which is crimped on the coating | coated part of the electric wire 40, and fixes the electric wire 40 is provided.
Further, the bottom surface portion 32a of the terminal intermediate portion 32 has the same structure as the bottom surface portion 10 of the terminal connection portion 5 of the terminal fitting 1 constituted by a female terminal fitting, and has a lance engaging portion 35, a lance fitting hole 36, Is equipped.

ランス係合部３５は、端子中間部３２の底面部３２ａから下方に隆起した構造で構成され、コネクタハウジング内のランスと係合することで、抜け止めを果たすようになっている。
また、端子中間部３２の底面部３２ａに形成されるランス嵌入孔３６は、ランス係合部３５に係合するコネクタハウジングの端子収容室に設けられたランスの外面側が没入可能な開口となっている。 The lance engaging portion 35 is configured to protrude downward from the bottom surface portion 32a of the terminal intermediate portion 32, and is configured to prevent the lance engaging portion 35 from engaging with the lance in the connector housing.
The lance insertion hole 36 formed in the bottom surface portion 32 a of the terminal intermediate portion 32 is an opening in which the outer surface side of the lance provided in the terminal housing chamber of the connector housing that engages with the lance engagement portion 35 can be immersed. Yes.

端子中間部３２のランス係合部３５の上端部には、図３に図示されるのと同じような、端子保持力向上面が設けられている。この端子保持力向上面は、端子中間部３２の底面部３２ａに形成されるランス嵌入孔３６を形成する孔端面とによって形成される鋭角な角部に形成されている。
この端子保持力向上面は、図４（Ａ）に示すように、ランス嵌入孔３６を形成する孔端面とによって形成されるランス係合部３５の上端部に微小なＲ面を形成して構成してある。
また、端子中間部３２のランス係合部３５の端子保持力向上面は、図４（Ｂ）に示すように、ランス嵌入孔３６を形成する孔端面とによって形成されるランス係合部３５の上端部に、微小な面取りをして構成してもよい。 A terminal holding force improving surface similar to that shown in FIG. 3 is provided at the upper end of the lance engaging portion 35 of the terminal intermediate portion 32. The surface for improving the terminal holding force is formed at an acute corner formed by the hole end surface that forms the lance insertion hole 36 formed in the bottom surface portion 32 a of the terminal intermediate portion 32.
As shown in FIG. 4A, the terminal holding force improving surface is formed by forming a minute R surface at the upper end portion of the lance engaging portion 35 formed by the hole end surface forming the lance fitting hole 36. It is.
Further, as shown in FIG. 4B, the terminal holding force improving surface of the lance engaging portion 35 of the terminal intermediate portion 32 is formed by the lance engaging portion 35 formed by the hole end surface forming the lance fitting hole 36. A fine chamfer may be formed on the upper end portion.

この他、本発明は本発明の主旨を変えない範囲で種々変更実施可能なことは勿論である。   In addition, the present invention can of course be modified in various ways within the scope not changing the gist of the present invention.

１……………………端子金具
２……………………コネクタハウジング
３……………………端子収容室
４……………………電線
５……………………端子接続部
６……………………前端開口
７……………………電線接続部
８……………………ワイヤバレル部
９……………………インシュレーションバレル部
１０…………………底面部
１１…………………ランス係合部
１２…………………ランス嵌入孔
１３…………………上端部
１４…………………端子保持力向上面
１４ａ………………微小なＲ面
１４ｂ………………微小な面取り
１５…………………孔端面
２０…………………ランス
２０ｂ………………自由端
３０…………………端子金具
３１…………………端子先端部
３２…………………端子中間部
３３…………………ワイヤバレル部
３４…………………インシュレーションバレル部
３５…………………ランス係合部
３６…………………ランス嵌入孔 1 …………………… Terminal fitting 2 …………………… Connector housing 3 …………………… Terminal receiving chamber 4 …………………… Wire 5 …………… ……… Terminal connection 6 …………………… Front end opening 7 …………………… Wire connection 8 …………………… Wire barrel 9 9 …………………… Insulation barrel 10 ..................... Bottom part 11 ............... Lance engaging part 12 ..................... Lance insertion hole 13 ... ……………… Upper end 14 …… Terminal holding force improving surface 14a ……………… Small R surface 14b ……………… Small chamfer 15 …………………… Hole end surface 20 ………………… Lance 20b ……………… Free end 30 ………………… Terminal fitting 31 ………………… Terminal tip 32 ………………… Terminal intermediate 33 ………………… Wire Barre Lubricating part 34 ............... Insulation barrel part 35 ..................... Lance engaging part 36 ... ……………… Lance insertion hole

Claims (4)

端子収容室に基端が片持ち状に支持されて弾性変形可能となるランスを備えるコネクタの前記端子収容室に挿入し前記ランスの自由端に係止する端子金具であって、
前記端子金具のランス係合部と前記ランスの自由端との係止当接面を設け、
前記係止当接面は、この上端部に、前記端子金具の端子接続部の底面部の面とランス嵌入孔の先端側の端面とによって形成される鋭角な角部を取り除いてなる端子保持力向上面を設けたことを特徴とする端子金具。 A terminal fitting that is inserted into the terminal accommodating chamber of a connector having a lance that is elastically deformable with a base end supported in a cantilever manner in the terminal accommodating chamber, and is locked to the free end of the lance,
Provide a locking contact surface between the lance engaging portion of the terminal fitting and the free end of the lance ,
The locking contact surface has a terminal holding force formed by removing an acute corner formed by the surface of the bottom surface of the terminal connection portion of the terminal fitting and the end surface of the distal end side of the lance insertion hole at the upper end portion. A terminal fitting characterized by an improved surface. 請求項１記載に記載の端子金具において、
前記端子保持力向上面は、前記ランス係合部の上端部に形成する微小なＲ面であることを特徴とする端子金具。 In the terminal fitting according to claim 1,
The terminal holding force improving surface is a minute R surface formed on an upper end portion of the lance engaging portion. 請求項１記載に記載の端子金具において、
前記端子保持力向上面は、前記ランス係合部の上端部に形成する微小な面取りであることを特徴とする端子金具。 In the terminal fitting according to claim 1,
The terminal holding force improving surface is a minute chamfer formed on an upper end portion of the lance engaging portion. 端子収容室に基端が片持ち状に支持されて弾性変形可能となるランスを備えるコネクタの前記端子収容室に挿入し前記ランスの自由端に係止する端子金具の製造方法であって、  A method of manufacturing a terminal fitting that is inserted into the terminal housing chamber of a connector having a lance that is elastically deformable with a base end supported in a cantilevered manner in a terminal housing chamber and is locked to a free end of the lance,
前記端子金具のランス嵌入孔の打ち抜き形成によって前記端子金具のランス係合部と前記ランスの自由端との係止当接面を形成する工程と、  Forming a locking contact surface between the lance engaging portion of the terminal fitting and the free end of the lance by punching the lance insertion hole of the terminal fitting;
前記ランス嵌入孔の打ち抜き時又は該打ち抜き後に、前記端子金具の端子接続部の底面部の面と前記ランス嵌入孔の先端側の端面とによって形成される鋭角な角部を打ち抜き用の金型と別途の金型で押圧して前記角部にＲ面を形成する又は面取りを施して端子保持力向上面を設ける工程と、  At the time of punching the lance insertion hole or after the punching, a die for punching a sharp corner formed by the surface of the bottom surface portion of the terminal connection portion of the terminal fitting and the end surface on the tip side of the lance insertion hole, A step of forming an R surface at the corner by pressing with a separate mold or chamfering to provide a terminal holding force improving surface;
を含むことを特徴とする端子金具の製造方法。  The manufacturing method of the terminal metal fitting characterized by including.
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