JP2011029125A - Insulation displacement connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stabilize contact resistance by contacting a core wire at high compression state. <P>SOLUTION: An insulation displacement connector 10 includes: an insulation displacement terminal 30 having a pair of clipping edges 32 extended from its base 31 with a groove 33 formed between the clipping edges 32 where a wire W is pushed in; a narrowing press member 40 having a tubular shape for fitting both the clipping edges 32 therein to press them so as to narrow the width of the groove 33 as the clipping edges 32 are inserted and to compress the pushed wire W press fitted into the groove 33 to the base side of the insulation displacement terminal 30; a housing 20; and a catch 34 which is formed in the back end of the groove 33 to catch the wire W pushed into the groove 33. The housing 20 includes a catch side body 21 which supports the base 31 of the insulation displacement terminal 30, a lid side body 22 which supports the narrowing press member 40, and a hinge 23 which connects the catch side body 21 and the lid side body 22 in an openable manner and the clipping edges 32 are fitted to the inside of the narrowing press member 40 by closing the catch side body 21 with the lid side body 22. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a pressure contact connector.

  Conventionally, the thing of the following patent document 1 is known as a press contact connector which has a press contact terminal provided with a pair of press contact blade. In this pressure contact connector, a groove is formed between both pressure contact blades, and the wire coating is cut by inserting the electric wire into this groove, and thereby the exposed core wire comes into contact with both pressure contact blades. Yes. Further, a narrow contact member is attached to the both press contact blades as the electric wire is inserted. The narrow contact member pushes the press contact blades in the direction in which both press contact blades approach, and the groove width of the groove is reduced. As a result, the core wire is narrowed from the groove width direction of the groove by the two press contact blades, and the reliability of electrical connection can be improved.

JP-A-6-20729

  However, in the above-mentioned pressure contact connector, although the core wire can be narrowed from the groove width direction of the groove, the core wire is free in the groove length direction. It is relaxed and the core wire cannot be pressed in a highly compressed state. For this reason, when the non-conductive film is formed on the core wire, the film cannot be scraped off, and the contact resistance may be increased.

  The present invention has been completed based on the above circumstances, and aims to remove the coating formed on the surface of the core wire and stabilize the contact resistance by pressing the core wire in a highly compressed state. And

  In the press contact connector of the present invention, a pair of press contact blades are extended side by side from a base, and a press contact terminal into which an electric wire is press-fitted into a groove formed between the press contact blades, and the both press contact blades can be fitted inside. Narrow pressure member that narrows both pressure contact blades in the direction of narrowing the groove width along with fitting, and supports the base of the pressure contact terminal and the narrow pressure member that pushes the wire press-fitted into the groove into the base side of the pressure contact terminal. The one side main body portion and the other side main body portion supporting the narrow pressure member are connected to each other by a hinge portion so as to be openable and closable. By closing the one side main body portion and the other side main body portion, the both press contact blades are narrow pressure members. And a receiving portion that is provided at the back end portion of the groove and that receives the electric wire pushed into the groove.

  According to such a configuration, first, the electric wire is arranged at the entrance portion of the groove, and the other side main body portion is closed so as to overlap the one side main body portion, thereby fitting the both press contact blades inside the narrow pressure member. Let When the electric wire is pushed into the groove by being pressed by the narrow pressure member, the coating of the electric wire is cut by the two press contact blades, the core wire is exposed, and the core wire contacts the both press contact blades. At the same time, the two press contact blades are displaced in a direction approaching each other, so that the core wire is narrowed in the groove width direction by the both press contact blades, and the coating formed on the surface of the core wire is easily scraped. And when one side main-body part and the other side main-body part reach a blockade state, a core wire will contact a receiving part and it will be in the state narrowed also in the length direction of the groove | channel by the narrow pressure member. For this reason, a core wire is press-contacted in a highly compressed state, a film can be scraped off, and contact resistance can be stabilized.

The following configuration is preferable as an embodiment of the present invention.
The press contact terminal has a long hole arranged side by side with respect to the groove and the both end of the press contact blade swings with the end of the long hole on the opposite side of the support as the base end. It is good also as a structure made displaceable.
According to such a configuration, since the two press contact blades are oscillating and displaced with the end portion of the elongated hole opposite to the receiving portion as the base end, than when both the press contact blades are oscillating and displaced with the receiving portion as the base end, The interval between the two press contact blades in the receiving portion can be reduced. Therefore, the core wire can be narrowed in a higher compression state.

The narrow pressure member may include a concave portion arranged corresponding to the groove when fitted to the two press contact blades, and the electric wire may be configured to be narrowed in a direction in which they approach between the receiving portion and the concave portion. .
According to such a configuration, the core wire can be narrowed in a stable state by narrowing the wire between the receiving portion and the recess.

  According to the present invention, by pressing the core wire in a highly compressed state, the coating formed on the surface of the core wire can be removed, and the contact resistance can be stabilized.

Side view of pressure contact connector Top view of the pressure connector The perspective view which showed the state which clamps an electric wire between a press-contact terminal and a narrow pressure member Sectional drawing which showed the state which mounted the electric wire in the entrance part of a groove | channel Sectional drawing which showed the state in the middle of pushing both press-contact blades into the fitting space of a narrow pressure member Sectional drawing which showed the state which pushed the both press-contacting blade into the fitting space rather than the state of FIG. 5, and the core wire contacted the receiving part The both press contact blades are further pushed into the fitting space than in the state of FIG. 6, and the core wire is narrowed in the vertical direction between the back end portion of the recess and the receiving portion, and is also narrowed in the width direction by the both press contact blades. Cross section shown

<Embodiment>
An embodiment of the present invention will be described with reference to the drawings of FIGS. As shown in FIG. 1, the press-connecting connector 10 of the present embodiment includes a housing 20, a pair of press-connecting terminals 30, a pair of narrow pressure members 40, and the like. The housing 20 is made of synthetic resin, and has a configuration in which a standby-side main body portion 21 and a pair of lid-side main body portions 22 are connected by hinge portions 23, respectively.

  The hinge portion 23 has flexibility, and includes a pair of flexible piece portions 23A arranged in parallel at a predetermined interval as shown in FIG. The lid side main body portion 22 is connected to the standby side main body portion 21 via the hinge portion 23 so as to be opened and closed. The standby-side main body 21 corresponds to “one-side main-body” in the present invention, and the lid-side main-body 22 corresponds to “other-side main-body” in the present invention.

  A pair of lock claws 24 are provided at a predetermined interval on the side edge portion of the lid-side main body portion 22 opposite to the hinge portion 23. On the other hand, the standby-side main body portion 21 is provided with a pair of lock holes 25 into which both lock claws 24 are fitted. When the lid side main body portion 22 is closed with respect to the standby side main body portion 21, both lock claws 24 are fitted into both lock holes 25, and a locking projection 24A provided at the tip of the lock claw 24 is a lock hole. The lid side main body portion 22 is held in a closed state with respect to the standby side main body portion 21 by being engaged with the 25 hole edge portions.

  A narrow pressure member 40 is erected on the lid-side main body 22, and a pair of press contact terminals 30 are erected on the standby-side main body 21. The two press contact terminals 30 are connected by a base 31 as shown in FIG. For this reason, when the electric wire W is connected to both the press contact terminals 30, both the electric wires W are electrically connected. The base 31 is press-fitted or insert-molded with respect to the standby-side main body 21, and the narrow pressure member 40 is press-fitted or insert-molded with respect to the lid-side main body 22.

  The narrow pressure member 40 is made of metal or synthetic resin, and is configured in a cylindrical shape having a horizontally long substantially square cross-sectional shape as a whole. The narrow pressure member 40 has an upper surface opening 41 that opens upward in the opened state of FIG. 1. For this reason, when the lid side main body portion 22 is closed to the standby side main body portion 21 around the hinge portion 23, the press contact terminal 30 can be fitted into the upper surface opening 41 of the narrow pressure member 40. That is, a fitting space S in which the press contact terminal 30 can be fitted is formed inside the narrow pressure member 40. Moreover, as shown in FIG. 1, the slit-shaped recessed part 42 is formed in the upper surface opening 41 of the narrow pressure member 40, and the entrance part of the recessed part 42 is formed so that a frontage may become wide gradually. .

  The press contact terminal 30 is made of metal, and is formed into a predetermined shape by punching a thin metal plate. The press contact terminal 30 has a pair of press contact blades 32 rising from a base 31. Each side edge of the two press contact blades 32 is arranged in a facing state with a predetermined interval. A substantially U-shaped groove 33 is formed by both opposing side edges 32 </ b> A of both press contact blades 32. The groove width of the groove 33 is set to be smaller than the diameter of the core wire W1 of the electric wire W. Further, the entrance portion of the groove 33 is formed so that the frontage is gradually widened.

  For this reason, as shown in FIG. 3, the electric wire W is disposed between the inlet portion of the groove 33 and the inlet portion of the recess 42, and the both press contact blades 32 are fitted in the fitting space S of the narrow pressure member 40. When the electric wire W is sandwiched, the electric wire W is press-fitted into the groove 33, the covering W2 is cut by the two press contact blades 32, and the core wire W1 exposed there comes into contact with the both press contact blades 32.

  By the way, the electric wire W of this embodiment is what is called an aluminum electric wire, Comprising: Aluminum or aluminum alloy is used as a material of the core wire W1. Aluminum wires are more susceptible to oxidation than non-copper wires, and non-conductive coatings are easily formed. As a result, it is not possible to scrape the coating sufficiently with the same pressure welding method as copper wires, increasing contact resistance. There is a risk. For this reason, in this embodiment, in order to remove the coating of the aluminum electric wire, various improvements are made. Hereinafter, the improvements will be described.

  In the press contact blade 32, the outer edge 32B located on the opposite side of the opposed side edge 32A has an inclination that approaches the opposed side edge 32A toward the distal end portion 32C. The distance between both outer edges 32B of the both press contact blades 32 is smaller than the width dimension of the fitting space S of the narrow pressure member 40 at the distal end portion 32C, but is formed at the back end portion of the groove 33. The portion 34 is made larger than the width dimension of the fitting space S of the narrow pressure member 40. This means that the two press contact blades 32 swing and displace in a direction approaching each other as the both press contact blades 32 are fitted in the fitting space S of the narrow pressure member 40.

  Further, a long hole 35 is formed below the receiving portion 34. In other words, the receiving portion 34 serves as a partition wall that partitions the groove 33 and the long hole 35. The long hole 35 has the same groove width as that of the groove 33 and has a shape that is long in the vertical direction (the length direction of the groove 33). For this reason, both the press contact blades 32 are narrowly pressed from both sides in the width direction while both outer edges 32B bite into the inner wall of the narrow pressure member 40, and are based on the lower end portion of the long hole 35 (the end portion opposite to the receiving portion 34). The tip 32C is oscillated and displaced as an end. Along with this, the receiving portion 34 is compressed and plastically deformed, and the press contact blades 32 are held in a state of swinging displacement by the receiving portion 34 and the inner wall of the narrow pressure member 40.

  The present embodiment is configured as described above, and its operation will be described subsequently. First, as shown in FIG. 4, the electric wire W is placed on the entrance portion of the groove 33, and the lid side main body portion 22 is closed toward the standby side main body portion 21 with the hinge portion 23 as the center. Then, as shown in FIG. 5, the two press contact blades 32 are fitted into the fitting space S of the narrow pressure member 40, and the electric wire W is pushed into the deep end portion of the concave portion 42 and press-fitted into the groove 33. The sheath W <b> 2 of the electric wire W is cut by the two press contact blades 32, and the exposed core wire W <b> 1 contacts the both press contact blades 32. Furthermore, both outer edges 32B of the two press contact blades 32 are pushed in from both sides in the width direction by the inner wall of the narrow pressure member 40, and the two press contact blades 32 are oscillated and displaced in the approaching direction. Thereby, the groove width of the groove 33 is narrowed, and the core wire W1 is narrowed from both sides in the width direction by the two press contact blades 32. Accordingly, the coating formed on the surface of the core wire W1 is efficiently removed by the two press contact blades 32.

  Further, when the both press contact blades 32 are fitted into the fitting space S of the narrow pressure member 40, as shown in FIG. 6, the both press contact blades 32 are further approached and the both end portions 32C are in contact with each other. Become. Here, since both the press contact blades 32 are oscillated and displaced with the lower end portion of the long hole 35 as the base end, the groove of the groove 33 at the site where the core wire W1 is press-contacted more than when it is oscillated and displaced with the receiving portion 34 as the base end. It becomes possible to narrow the width. In a state where the core wire W1 is received by the receiving portion 34, the core wire W1 is narrowed in a stable state from above and below by the back end portion of the recess 42 and the receiving portion 34. When the narrow pressure member 40 is further pushed in from here, the core wire W1 is narrowed between the back end portion of the recess 42 and the receiving portion 34 as shown in FIG. By narrowing also in the width direction, the strands constituting the core wire W1 and the two press contact blades 32 adhere to each other and are connected so as to be conductive. Thus, the electric wires W are electrically connected, and the contact resistance is stabilized. In this state, both lock claws 24 are fitted into both lock holes 25, and both locking projections 24A are locked to the hole edges of both lock holes 25, so that the standby side main body portion 21 and the lid side main body portion 22 are engaged. Are held in a closed state.

  As described above, in the present embodiment, the narrow pressure member 40 that can be fitted to the both press contact blades 32 is provided, so that the wire W is pressed into the groove 33 to cut the coating W2, and the core wire W1 is narrowed from both sides in the width direction. Therefore, the coating formed on the surface of the core wire W1 can be efficiently removed, and the core wire W1 can be pressed in a highly compressed state. Further, since the receiving portion 34 is formed at the back end portion of the groove 33 and the long hole 35 is provided below the receiving portion 34, both the distal end portions 32 </ b> C of the both press contact blades 32 are formed with the lower end portion of the long hole 35 as the base end. The groove 33 can be displaced in a swinging manner, and the groove width of the groove 33 at the pressure contact portion of the core wire W1 can be reduced. Moreover, since the core wire W1 is narrowed in the width direction by the two press contact blades 32 while being narrowed in the vertical direction between the back end portion of the recess 42 and the receiving portion 34, the coating formed on the surface of the core wire W1 is formed. The strands constituting the core wire W1 and the both press contact blades 32 can be adhered by removing them. Thereby, contact resistance can be stabilized.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) Although the press contact terminal 30 having the long hole 35 is used in the above embodiment, the press contact terminal not having the long hole may be used according to the present invention.
(2) Although the concave portion 42 of the narrow pressure member 40 is formed in the above embodiment, according to the present invention, a narrow pressure member that does not include the concave portion may be used.
(3) Although a pair of press contact blades 32 is provided in the above embodiment, according to the present invention, one of the press contact blades 32 may be a crimping portion having a barrel shape.

DESCRIPTION OF SYMBOLS 10 ... Pressure-contact connector 20 ... Housing 21 ... Standby side main-body part (one side main-body part)
22 ... Cover side body (other side body)
DESCRIPTION OF SYMBOLS 23 ... Hinge part 30 ... Pressure contact terminal 31 ... Base part 32 ... Pressure contact blade 32C ... Tip part 33 ... Groove 34 ... Receiving part 35 ... Long hole 40 ... Narrow pressure member 42 ... Recessed part W ... Electric wire

Claims (3)

A pair of press contact blades extending side by side from the base, and a press contact terminal in which an electric wire is press-fitted into a groove formed between the two press contact blades;
The both press contact blades are formed in a cylindrical shape that can be fitted therein, and the press contact blades are narrowed in the direction of narrowing the groove width of the grooves along with the fitting, and the wires press-fitted into the grooves are pressed into the press contacts. A narrow pressure member pushed into the base side of the terminal;
The one side main body portion supporting the base portion of the press contact terminal and the other side main body portion supporting the narrow pressure member are connected to each other by a hinge portion so as to be opened and closed, and the one side main body portion and the other side main body portion are connected to each other. A housing in which the two press contact blades are fitted inside the narrow pressure member by closing,
A pressure contact connector provided with a receiving portion that is provided at a deep end portion of the groove and receives the electric wire pushed into the groove.   The press contact terminal has a long hole arranged side by side on the back side of the receiving portion with respect to the groove, and the both press contact blades are based on an end portion of the long hole opposite to the receiving portion. The pressure contact connector according to claim 1, wherein the tip portion is swingable and displaceable.   The narrow pressure member includes a concave portion arranged corresponding to the groove when fitted to the two press contact blades, and the electric wire is narrowly compressed in a direction in which they approach between the receiving portion and the concave portion. The press-connecting connector according to claim 1 or 2, wherein the press-connecting connector is provided.

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