JPH07192794A - Electric connector terminal - Google Patents

Abstract

PURPOSE:To provide an electric connector terminal whose safety is secured and which is easy of manufacture and excellent in conductivity by eliminating the contact between members different in conductivity so as to reduce the electric resistance at a contact part. CONSTITUTION:This electric connector terminal is equipped with a male terminal 2, which has a bar-shaped male type of contact, a tubular terminal 3, where a through hole 4 for receiving this is bored, a circular elastic contact member 5, which is retained along the axis A inside the through hole and can contact by face with the male contact 1, a conductor fastening part 7, which is provided continuously at the rear of the female terminal likewise along the axis through a retaining step 6, and a cover fastening part 8. Furthermore, the elastic contact member 5 is made of well conductive member, and besides this has a fastening member 9, which extends to the conductor fastening part 7, getting over the through hole inside the retaining step 6, integrally, and the cover fastening part 8 fastens and fixes the conductor cover, and also the conductor fastening part 7 fastens and fixes the fastening piece 7 together with the conductor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric connection terminal,
In particular, the present invention relates to an electric connection terminal having excellent conductivity suitable for a device that requires a large current.

[0002]

2. Description of the Related Art Conventionally, as an electric connection terminal for such a large current, as shown in FIGS. 6 and 7, a hard conductive hard member elastically deformed into an Ω shape into which a male connector is fitted. A box-shaped female connector in which an electric contact made of a metal plate is arranged has been used. Such a female connector is composed of two elements, one of which is a bottom plate 101 having a U-shaped cross section, which is formed by connecting a conductive wire connecting portion 102 which can be swaged backward.
And a pair of side wall plates 103 which are erected at two positions along the length direction, and an upper plate 104 which is formed by bending the side wall plates further inward and parallel to the bottom plate 101. Is a female connector body 100 of the mold,
The other element is an expanding guide piece 106 in which both ends of an Ω-shaped metal plate are curved outwardly so as to easily receive the tongue-shaped male member, and then the tongue-shaped male member is formed. In order to form a throat portion 107 which protrudes inwardly and which directly slides and contacts each other, and further for longitudinal positioning between the two side wall plates and for contacting the bottom plate 101,
The electric contactor 105 has a pair of upper and lower engaging projections 108 projecting on both sides and connected to an intermediate portion. At the time of assembly, as shown in FIG. 7, the locking projection 108 of the electric contactor 105 is positioned by fitting it between the two side wall plates 103, and then the side wall plate 103 and the upper plate 104 are rectangular in cross section. By bending so as to form the inside of the female connector main body 100, and further applying the conductor wire 110 to the conductor wire crimping portion 102, applying the conductor wire coating 109 to the cover crimping portion 103, and then crimping from the surroundings to complete. To do.

Therefore, at the time of use, the socket A on the device side having the male connector M is clamped by the throat portion 107 of the electric contactor 105 disposed inside the electric connector body 100.
Due to this, the electric current is changed from the conductor 110 to the conductor crimping portion 1
02, the bottom plate 101, the side wall plate 103, and the upper plate 104 to reach the locking projection 108 of the electric contact 105, and further to the male connector M through the throat 107. Therefore, the electric current will flow to the male connector through several point contact portions.

[0004]

When the above-mentioned type of connector is used as a connector for a device that generally requires a large current, it should be noted that heat generation and arc generation are prevented. Therefore, it is necessary to reduce the electric resistance of the contact portion between them, and for that purpose, it is important to avoid the contact portion between the members having different conductivity as much as possible. This is due to the fact that current, which is a general characteristic of electricity, flows from a high resistance part, that is, a low conductivity part to a low resistance part, that is, a high conductivity part. If a member with high conductivity and a member with low conductivity are contacted and a large current is to flow, the current will not flow to the member with low conductivity, but the member with low conductivity, that is, resistance If it is attempted to flow through a member having a high temperature, the member will generate heat and it is extremely dangerous.

However, in general, due to manufacturing problems, the female connector, which is one of the elements, is manufactured from a zinc soft iron plate or a brass plate having good workability, and the electric contact, which is the other element, is a phosphor bronze plate or a brass plate. It is manufactured from a material with poor workability such as a copper plate. Incidentally, considering the fact that the former is inferior in conductivity to the latter, a large electric resistance is obviously generated between both members, and the above-mentioned problem occurs.

However, the present invention secures high safety by eliminating contact between members having different electric conductivity and reduces electric resistance of the contact portion, and is easy to manufacture, especially for large current such as electric vehicle. An object of the present invention is to provide an electrical connection terminal having excellent conductivity which is suitable for equipment.

[0007]

In order to achieve the above object, an electrical connection terminal according to the present invention has a female terminal having a rod-shaped male contact and a through hole for receiving the male contact. A cylindrical female terminal provided, an annular elastic contact member held along the axis in the through hole and capable of contacting the outer peripheral surface of the male contact, and a rear end of the female terminal. The elastic contact member is made of a highly conductive material, and the elastic contact member is provided inside the retaining step portion. Integrally has a crimping piece that extends over the through hole of the conductor wire crimping portion, and the covering crimping portion crimps and fixes the conductor wire covering, and the conductor wire crimping portion together with the conductor wire and the crimping piece. It is characterized in that it is made to be crimped and fixed.

In order to fix the elastic contact member along the axial direction by the through hole, the above-mentioned object is to reduce the diameter reduced portion near the inlet end and the diameter reduced portion provided in the holding step. It can also be achieved by providing the contactor storage chamber defined by. Further, the above-mentioned object is that the elastic contact member has an annular elastic contact and a crimping piece, and the elastic contactor and the crimping piece are thin strips extending in the axial direction from the elastic contactor. This can also be achieved by being electrically connected by a conducting portion, and having a central portion of the elastic contact element having a reduced diameter and having elasticity outward in the radial direction.

Further, the above-mentioned object is that the elastic contact member is composed of an elastic contact, a crimping piece and a conducting portion for electrically connecting them, and is integrally molded from a single hard metal plate having good conductivity. It can also be achieved by being done.

[0010]

The electric current from the conductor or from the male terminal is caulked and connected directly to the caulking piece integrally formed with the elastic contact member at the caulking portion of the conductor and the caulking connection. There is no point contact between the terminals, and the elastic contact member is integrally made of a good conductive material, so current does not flow to the female terminal made of ordinary conductive material and it is excellent. It is possible to obtain excellent conductivity.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electrical connector according to the present invention will be described below with reference to the drawings. In FIG. 1, a male terminal 2 having a round bar-shaped contactor 1 which is one element of an electrical connector according to the present invention, and a through hole 4 having a round cross section for receiving the male contactor are bored. And a cylindrical female terminal 3 which is formed into a cylindrical shape, and the through hole 4 has a holding step portion in which a lead wire caulking portion 7 is continuously provided from a tip end portion of the female terminal 3 with which the male terminal 2 abuts. Since it penetrates the tubular portion up to 6, and the male terminal is of a generally well-known type, its detailed description is omitted.

On the other hand, in the female terminal 3, the elastic contact 5 is housed along the axis A in a substantially middle portion of the through hole 4 such that the elastic contact 5 can move slightly in the axial direction. This elastic contactor 5 is made of a good conductive hard metal such as phosphor bronze, which has poor machinability but low electric resistance, and is an annular elastic contactor 11 capable of contacting the outer peripheral surface of the male contactor 1. And the crimping piece 9 are integrally provided, and the elastic contactor and the crimping piece 9 have the elastic contactor 1.
1 is electrically connected by a thin strip-shaped conducting portion 10 extending in the axial direction, and the axial center portion of the elastic contact has a radially reduced inwardly-reducing portion 16 and is radially outward. It has elasticity towards.

Further, a constricted holding step 6 is formed at the rear end of the female terminal 3 and is attached directly to the side wall of the device or via a rubber bush or the like. Further, the female terminals are located at the rear of this holding step along the axis, respectively.
A conductor crimping portion 7 made of a pair of expanded blade-shaped flat plates and a covering crimping portion 8 are formed behind the conductor crimping portion 7. These two crimping portions are assembled by assembling a conductor wire 20 and a conductor wire sheath 21 to be connected, respectively. It is fixed by crimping at the stage.

Usually, these swaged portions are made of a material having ordinary conductivity and are integrally bent and swaged as shown in FIGS. 4 and 5, but in the present invention, these swaged portions are crimped. Since the caulking piece 9 electrically connected to the elastic connector member 5 is directly connected to the conductive wire 20, the part can use an electrically insulating material, and the aluminum piece can be used according to the convenience of manufacturing and assembling. It is also possible to insert an inexpensive or easy caulking material into the terminal body and integrally mold the insulating synthetic resin.

Further, the through hole 4 of the female terminal 3 has a front reduced diameter portion 12 near the inlet end portion for radially positioning when the male contact 1 is fitted, and At the same time, as shown in FIG. 3, the reduced diameter portion is a rear reduced diameter portion 13 provided on the inner surface of the through hole of the constricted portion of the holding step portion 6 in order to hold the elastic contact member 5 along the axial direction. Provides a contactor accommodating chamber 14 defined by and in the axial direction. Therefore, the conducting portion 10 of the elastic contact member 5 is used by being bent in a trapezoidal shape so as to extend beyond the rear reduced diameter portion 13 and reach the wire crimping portion 7. In addition, the caulking piece 9 connected to the conducting portion 10 in the conductor caulking portion 7
Has a large number of conductors bundled together thereon as shown in FIG. 5 to achieve good electrical contact. The length of the contactor accommodating chamber 14 is longer than the length of the elastic contactor 11 in the axial direction, and the elasticity of the reduced diameter portion 16 toward the outside in the radial direction is secured.

As is apparent from FIG. 2, the elastic contactor 1
1 has a rectangular shape at the manufacturing stage, and in the band-shaped range in the central portion in the length direction thereof, a large number of slits 1 arranged at equal intervals in the lateral direction for ensuring elasticity of the reduced diameter portion 16.
5 is drilled. When manufacturing the elastic contact member 5, the elastic contact 11, the caulking piece 9 and the conducting portion 10 for electrically connecting them are punched out from a single hard metal plate having good conductivity as shown in the figure. It may be manufactured by pressing one by one, but in the case of mass production,
The best method is to manufacture the illustrated material in advance in the lengthwise direction (left and right in the drawing) in advance and cut between adjacent slits of a predetermined length to form one member. At the time of finishing, it is preferable that both ends are formed into an annular shape by spot welding or brazing, and then the central portion in the axial direction is drawn from the outside by a mandrel or the like to form the reduced diameter portion 16. Further, the slit 15 does not necessarily have to be perpendicular to the length direction, and even if it is slightly inclined, it is sufficient that a sufficient elastic action is exhibited, and there is no problem such as abrasion when the male connector 1 is fitted. For example, it suffices if it is oriented substantially in the axial direction in the completed state.

Further, although the crimping piece 9 is a strip-shaped flat plate in the illustrated case, when it is applied to a position along the side surface of the conductor crimping portion, it is preferably curved along the axial direction. It is more preferable, and when the caulking portion is tubular, rather preferable results are obtained.

[0018]

As described above, in the electrical connection terminal according to the present invention, the female terminal is made of a material having a normal conductivity and the elastic connector is made of a good conductive material. Most of them flow to the male contactor through the elastic contactor member and do not flow to other parts. Therefore, the female terminal has very low conductivity or insulating synthetic resin material with excellent moldability. It is also possible to easily integrally form such materials as described above, and the risk of heat generation due to contact resistance and concentrated resistance due to the use of two members having different electrical conductivity and the elimination of these contact parts as much as possible. Are completely avoided and a huge increase in productivity is obtained.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an electric connector according to the present invention.

FIG. 2 is a plan development view of an elastic contact member used in the electrical connector according to the present invention.

FIG. 3 is an explanatory view of female terminal assembly using a cross-sectional view taken along the line I-I in FIG.

FIG. 4 is a perspective view showing a caulking connection state between a rear end portion of a female terminal of an electric connector according to the present invention and a lead wire.

5 is a cross-sectional view taken along the arrow II-II in FIG.

FIG. 6 is an exploded perspective view of a female connector in a conventional electrical connector.

FIG. 7 is an explanatory view of a usage state of the conventional electrical connector shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Male contactor 2 Male terminal 3 Female terminal 4 Through hole 5 Elastic contactor member 6 Retaining step 7 Conductor caulking part 8 Cover caulking part 9 Caulking piece 10 Conducting part 11 Elastic contactor 12 Front shrinkage Diameter portion 13 Rear reduced diameter portion 14 Contact housing chamber 15 Slit 16 Reduced diameter portion 20 Conductive wire 21 Conductive wire coating 100 Female connector body 101 Bottom plate 102 Electric wire connecting portion 103 Side wall plate 104 Upper plate 105 Electric contactor 106 Expanded guide Piece 107 Throat 108 Locking protrusion 109 Conductive wire coating 110 Conductive wire A Socket M Male contactor

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[Procedure amendment]

[Submission date] May 16, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 2

[Correction method] Change

[Correction content]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 4

[Correction method] Change

[Correction content]

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

[0010]

The electric current from the conductor or from the male terminal is caulked and connected directly to the caulking piece integrally formed with the elastic contact member at the caulking portion of the conductor and the caulking connection. Since there is no point contact between the terminals and the elastic contact member is integrally made of a good conductive material, almost no current flows in the female terminal made of a normal conductive material, which is excellent. It is possible to obtain conductivity.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

On the other hand, in the female terminal 3, the elastic contact 5 is housed along the axis A in a substantially middle portion of the through hole 4 such that the elastic contact 5 can move slightly in the axial direction. The elastic contact member 5 is made of a good conductive hard metal such as phosphor bronze, which has poor machinability but low electric resistance, and is an annular elastic contact capable of contacting the outer peripheral surface of the male contact 1. 11 and a caulking piece 9 are integrally formed, and the elastic contactor 11 and the caulking piece 9 are thin strip-shaped conducting portions 10 extending from the elastic contactor 11 in the axial direction.
Are electrically connected to each other, and the central portion in the axial direction of the elastic contactor 11 has a reduced diameter portion 16 directed radially inward and has elasticity radially outward.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

Further, a constricted holding step 6 is formed at the rear end of the female terminal 3 and is attached directly to the side wall of the device or via a rubber bush or the like. Further, the female terminal 3 is provided with a conductor crimping portion 7 formed of a pair of blade-shaped flat plates which are also expanded along the axis behind the holding step portion 6 and a covering crimping portion 8 behind the lead wire crimping portion 7. And these 2
The caulking portions are caulked and fixed at the final stage of assembling the conductor wire 20 and the conductor wire sheath 21 to be connected.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction content]

As apparent in FIG. 2, the elastic contact piece 11 is rectangular in the manufacturing stage, the band range in the length direction central portion laterally to ensure the elasticity of the reduced diameter portion 16 equal A large number of slits 15 arranged at intervals are provided. When manufacturing the elastic contact member 5, the elastic contact 11, the caulking piece 9 and the conducting portion 10 for electrically connecting them are punched out from a single hard metal plate having good conductivity as shown in the figure. Although it may be manufactured by a single press, in the case of mass production, the illustrated one is continuously manufactured in advance in the length direction (left and right in the figure) and is adjacent for a predetermined length. The most suitable method is to cut the slits into one member. In addition,
At the time of finishing, it is preferable that both ends are formed into an annular shape by spot welding or brazing, and then the central portion in the axial direction is drawn from the outside by a mandrel or the like to form the reduced diameter portion 16. Further, the slit 15 does not necessarily have to be perpendicular to the length direction, and even if it is slightly inclined, it is sufficient that a sufficient elastic action is exhibited, and there is no problem such as abrasion when the male connector 1 is fitted. For example, it suffices if it is oriented substantially in the axial direction in the completed state.

[Procedure Amendment 7]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

Claims (4)

[Claims] 1. A male terminal having a male contact, a female terminal having a through hole for receiving the male contact, and a male terminal held in the through hole along an axial line. An annular elastic contact member capable of making surface contact with the outer peripheral surface of the contactor, and a lead wire crimping portion and a cover crimping portion continuously provided along the axis line at the rear end of the female terminal through a holding step portion. The elastic contact member is made of a highly conductive material and integrally has a crimping piece that extends to the conductor crimping portion beyond the through hole in the holding step portion. The electrical connection terminal is characterized in that the cover crimping portion crimps and fixes the conductor wire coating, and the conductor wire crimping portion crimps and fixes the crimping piece together with the conductor wire. 2. The reduced diameter portion near the inlet end portion and the reduced diameter portion provided on the holding stepped portion define the through hole for fixing the elastic contact member along the axial direction. The electrical connection terminal according to any one of claims 1 to 5, further comprising a contact storage chamber formed therein. 3. The elastic contact member has an annular elastic contact and a crimping piece, and the elastic contactor and the crimping piece are thin strip-shaped conductive members extending axially from the elastic contactor. 2. The electricity according to claim 1, wherein the elastic contacts are electrically connected to each other, and the central portion of the elastic contact is reduced in diameter and has elasticity outward in the radial direction. Connecting terminal. 4. The elastic contact member comprises the elastic contact, the caulking piece, and the conducting portion for electrically connecting them, and is integrally molded from a single hard metal plate having good conductivity. The electrical connection terminal according to claim 7 or 8, characterized in that.