JP5223817B2 - IDC connector - Google Patents

Description

  The present invention relates to a pressure contact connector.

  Conventionally, as a press contact terminal provided with a press contact blade that bites into an electric wire, for example, those described in Patent Documents 1 to 4 below are known. Each of these press contact terminals has a holding part for holding the electric wire, and the press contact blade bites into the electric wire held by the holding part, and the press contact blade breaks through the coating of the electric wire to contact the core wire. The electric wire and the press contact terminal are electrically connected.

JP-T 62-503063 JP 59-23479 A Japanese Utility Model Publication No. 61-77565 JP 2002-270253 A

  However, in the above-mentioned pressure contact connector, although the electric wire is held by the holding portion, the portion that is not in contact with the holding portion is free, so that the core wire is freely deformed as the pressure contact blade bites, and the compression force 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

  The press-connecting connector of the present invention has a holding member having a holding groove into which an electric wire is inserted in a press-fit manner, and an insertion portion to be inserted in the vicinity of the holding groove, and a press-contact blade is provided at the insertion direction tip of the insertion portion. The formed press contact terminal, the one side main body portion supporting the end opposite to the press contact blade in the insertion portion, and the other side main body portion supporting the holding member are connected by a hinge portion so as to be opened and closed. The housing is inserted into the holding groove by closing the side main body and the other side main body, and the inner end of the holding groove is inserted into the holding groove. It is characterized in that it has a configuration including a receiving portion for narrowing the electric wire between the inserted portion and the insertion portion.

  According to such a configuration, when the electric wire is blocked by being sandwiched between the one-side main body portion and the other-side main body portion, the electric wire is inserted into the holding groove in a press-fit manner by the insertion portion. When the electric wire reaches the receiving portion, the press contact blade bites into the electric wire, so that the electric wire is narrowed between the insertion portion and the receiving portion. And when one side main-body part and the other side main-body part reach the obstruction | occlusion state, a core wire will be 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 includes a one-side guide wall extending from one side edge of the insertion portion to one side, and a guide wall extending from the other side to the other side. The other side guide wall is connected to the one side guide wall and the other side guide wall in a face-to-face state, and the electric wire is connected to the one side guide wall and the other side through the insertion portion. It is good also as a structure inserted in the guide groove formed between the guide walls.

  According to such a configuration, the holding member can be positioned with respect to the press contact terminal by mounting the holding member so as to face the one side guide wall and the other side guide wall. Further, the electric wire can be positioned with respect to the press contact terminal by inserting the electric wire into the guide groove.

At the back end of the holding groove, a relief part is formed by extending in the direction intersecting with the insertion direction of the insertion part, and the electric wire may be configured to be compressed while being fitted in the relief part. Good.
According to such a configuration, the electric wire can be positioned in a stable state by fitting the electric wire into the escape portion from the holding groove, and the press contact blade can be bitten into the electric wire. Thereby, contact resistance can be stabilized.

The press contact blade may have a circular arc shape.
According to such a configuration, the press contact blade can easily bite into the electric wire.

  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 before pinching an electric wire between a press-contact terminal and a holding member. The perspective view which showed the state which mounted | worn the holding member with the press contact terminal in the positioning state Sectional drawing which showed the state which mounted the electric wire in the entrance part of a guide groove Sectional drawing which showed the state which inserted the electric wire from the state of FIG. 5 into the holding groove, and the electric wire contacted the receiving part. FIG. 6 is a cross-sectional view showing a state where the electric wire is pushed into the receiving portion rather than the state of FIG. 6, the electric wire is pressed into the escape portion and is narrowed, and the press contact blade has bite into the electric wire.

<Embodiment>
An embodiment of the present invention will be described with reference to the drawings of FIGS. As shown in FIG. 1, the pressure contact connector 10 of the present embodiment includes a housing 20, a pair of pressure contact terminals 30, a holding member 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 holding 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 holding member 40 is press-fitted or insert-molded with respect to the lid-side main body 22.

  The holding member 40 is made of metal or synthetic resin, and is configured in a plate shape having a horizontally long substantially square cross-sectional shape. The holding member 40 protrudes upward from the upper surface of the lid-side main body 22 in the opened state of FIG. For this reason, when the lid side main body portion 22 is closed to the standby side main body portion 21 with the hinge portion 23 as the center, the holding member 40 is attached to the press contact terminal 30 from above. In addition, a slit-like holding groove 41 is formed in the upper portion of the holding member 40, and an inlet portion 41A of the holding groove 41 is formed so that the frontage is gradually widened.

  As shown in FIG. 5, the holding groove 41 has a groove width smaller than the diameter dimension of the electric wire W. For this reason, as shown in FIG. 6, the electric wire W is inserted into the holding groove 41 with a press fit. The edge of the holding groove 41 is chamfered, and the coating W <b> 2 of the electric wire W is not cut by the edge of the holding groove 41. In addition, a relief portion 42 having a horizontally long elliptical shape is formed at the back end of the holding groove 41 by widening the holding groove 41 on both sides in the width direction. The area of the escape portion 42 is the same as or slightly smaller than the cross-sectional area of the electric wire W.

  As shown in FIG. 3, the press contact terminal 30 is formed by punching a metal plate and then bending it, and a pair of guide walls 32 </ b> A and 32 </ b> B are arranged in a stepped manner via the insertion portion 33. It is. A pressing blade 35 having an arc shape is formed on the upper edge of the insertion portion 33. The height of the insertion portion 33 is approximately half of the height of both guide walls 32A, 32B, and the substantially lower half of both guide walls 32A, 32B is connected by the insertion portion 33.

  In the following description, the pressure contact terminal 30 on the right side of the figure will be described as a representative. As shown in FIG. 1, the left side guide wall of the guide walls 32A and 32B is referred to as the one side guide wall 32A, and the right side guide wall in the figure is shown. Is the other side guide wall 32B. Both guide walls 32 </ b> A and 32 </ b> B are arranged so as not to face in the axial direction of the electric wire W. A guide groove 34 is formed between the guide walls 32A and 32B. That is, the guide groove 34 is configured by the right side surface of the one side guide wall 32 </ b> A, the left side surface of the other side guide wall 32 </ b> B, and the upper surface of the insertion portion 33. The entrance portion 34A of the guide groove 34 is formed so that the frontage gradually becomes wider.

  Both guide walls 32A and 32B are arranged with an interval of one sheet thickness of the insertion portion 33 when viewed from the axial direction of the electric wire W shown in FIG. Moreover, when viewed from the upper side shown in FIG. 2, both guide walls 32 </ b> A and 32 </ b> B are arranged with an interval corresponding to one plate thickness of the holding member 40. The insertion part 33 is arrange | positioned corresponding to the holding member 40 and the width direction, as shown in FIG. For this reason, when the lid side main body portion 22 is closed to the standby side main body portion 21, the holding member 40 is fitted between the guide walls 32A and 32B and the insertion portion 33 is inserted into the holding groove 41 as shown in FIG. enter in.

  Here, since the thickness of the insertion portion 33 is substantially the same as or slightly smaller than the groove width of the holding groove 41, the holding member 40 is placed in the groove width direction of the holding groove 41 with respect to the press contact terminal 30. Can be mounted in a positioned state. Further, the holding member 40 is mounted in a state where the front surface of the holding member 40 is in close contact with the back surface of the one side guide wall 32A and the back surface of the holding member 40 is in close contact with the front surface of the other side guide wall 32B. 40 can be attached to the press contact terminal 30 in a positioning state in the axial direction of the electric wire W.

  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.

  A receiving portion 43 is formed at the inner end of the holding groove 41. As shown in FIG. 5, when the electric wire W is press-fitted into the holding groove 41 after the electric wire W is placed on the inlet portion 34 </ b> A of the guide groove 34, the core wire W <b> 1 enters the receiving portion 43 as shown in FIG. 6. Contact. When the electric wire W is further pushed in from here, the electric wire W fits into the escape portion 42 and the press contact blade 35 bites into the electric wire W as shown in FIG. Thereby, the electric wire W is narrowly pressed from the up-down direction by the insertion part 33 and the receiving part 43, and is press-contacted in a highly compressed state.

  The reason why the electric wire W is narrowed in this way is that the electric wire W is fitted into the escape portion 42 and the holding groove 41 is blocked by the insertion portion 33, and the press contact blade is in a state where the escape place of the electric wire W is lost. 35 is inserted into the electric wire W, and the press contact blade 35 bites into the electric wire W, whereby a very high compressive force is applied to the electric wire W. As a result, the core wire W1 is pressed against the press contact blade 35 in a highly compressed state, the coating formed on the surface of the core wire W1 is removed, and the strands constituting the core wire W1 and the press contact blade 35 adhere to each other. Are connected in a conductive manner.

  The present embodiment is configured as described above, and its operation will be described subsequently. First, as shown in FIG. 5, the electric wire W is placed on the inlet portion 34 </ b> A of the guide groove 34, 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, the insertion portion 33 is inserted into the holding groove 41, and the electric wire W is press-fitted into the holding groove 41. In parallel with this, since the electric wire W is guided in the vertical direction by the guide groove 34, the electric wire W can be positioned with respect to the press contact terminal 30. In the process of press-fitting the electric wire W into the holding groove 41, the coating W <b> 2 is not cut by the edge of the holding groove 41 or the edge of the guide groove 34.

  As the press-fitting of the electric wire W proceeds and the electric wire W comes into contact with the receiving portion 43 as shown in FIG. 6, when the electric wire W is further pushed into the receiving portion 43, the electric wire W is fitted into the escape portion 42. At this time, the electric wire W is deformed into a horizontally long elliptical shape along the shape of the relief portion 42, and thus is positioned in a stable state with respect to the holding member 40. At the same time, since the holding groove 41 is closed by the insertion portion 33, the electric wire W can no longer escape to the holding groove 41 side and the escape portion 42 loses the escape place.

  Then, when the press contact blade 35 is bitten into the electric wire W that has lost its escape, the electric wire W is narrowed in the vertical direction by the insertion portion 33 and the receiving portion 43 as shown in FIG. A compressive force is generated as the press contact blade 35 bites in, and the core wire W1 is pressed against the press contact blade 35 in a highly compressed state, and the coating formed on the surface of the core wire W1 is removed and the core wire W1 is configured. The core wire W1 and the press contact blade 35 are connected to each other in a conductive state in a state in which the element wire and the press contact blade 35 adhere to each other and the contact resistance is stable. Thus, the two electric wires W respectively connected to the two press contact terminals 30 are electrically connected. 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, after the electric wire W is fitted into the escape portion 42, the holding groove 41 is closed with the insertion portion 33, and the escape area of the electric wire W is eliminated, and the press contact blade 35 is bitten into the electric wire W. Therefore, the electric wire W can be narrowed between the insertion portion 33 and the receiving portion 43 in the vertical direction. Thereby, the core wire W1 of the electric wire W and the press-contacting blade 35 can be pressed in a highly compressed state, the coating formed on the surface of the core wire W1 can be removed, and the contact resistance can be stabilized.

  In addition, the press contact terminal 30 is formed in a stepped shape, the holding member 40 is sandwiched between the guide walls 32A and 32B, and the insertion portion 33 is sandwiched by the holding groove 41. Can be mounted in the positioning state. Further, since the electric wire W is guided by the guide groove 34, the electric wire W can be positioned with respect to the press contact terminal 30. Furthermore, since the escape portion 42 is provided, the electric wire W can be positioned in a stable state. Further, since the press contact blade 35 is formed in an arc shape, the press contact blade 35 can be easily bited into the electric wire W.

<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 a pair of the press contact terminals 30 are provided in the above embodiment, according to the present invention, one of the press contact terminals 30 may be a crimping portion having a barrel shape.
(2) Although the guide groove 34 is formed between the guide walls 32A and 32B in the above embodiment, according to the present invention, the guide walls 32A and 32B are formed at the same height as the insertion portion 33. It is good also as a structure without the guide groove 34. FIG.

(3) Although the escape portion 42 is provided at the inner end of the holding groove 41 in the above-described embodiment, the escape portion 42 may not be provided according to the present invention.
(4) Although the press contact blade 35 is formed in an arc shape in the above embodiment, according to the present invention, a press contact blade having a needle shape or a mountain shape may be formed.

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 32A ... One side guide wall 32B ... Other side guide wall 33 ... Insertion part 34 ... Guide groove 35 ... Pressure contact blade 40 ... Holding member 41 ... Holding groove 42 ... Relief part 43 ... Receiving part W …Electrical wire

Claims (4)

A holding member having a holding groove into which the electric wire is inserted in a press-fit manner;
A pressure contact terminal having an insertion portion that is inserted close to the holding groove, and a pressure contact blade formed at a distal end of the insertion portion in the insertion direction;
One side main body part supporting the end of the insertion part opposite to the press contact blade and the other side main body part supporting the holding member are connected by a hinge part so as to be opened and closed, and the one side main body part And a housing in which the insertion part is inserted into the holding groove by closing the other side main body part,
Pressure contact provided with a receiving portion that is provided at the back end portion of the holding groove and narrows the wire between the insertion portion inserted into the holding groove by causing the pressure contact blade to bite into the wire. connector.   The press contact terminal includes a one-side guide wall extending from one side edge of the insertion portion to one side, and an other-side guide wall extending from the other side to the other side, The one side guide wall and the other side guide wall are connected in a stepped shape via the insertion portion, and the holding member is attached to the one side guide wall and the other side guide wall in a facing state, The pressure contact connector according to claim 1, wherein the electric wire is inserted into a guide groove formed between the one side guide wall and the other side guide wall.   An escape portion is formed at the back end portion of the holding groove by extending in a direction intersecting with the insertion direction of the insertion portion, and the electric wire is narrowed in a state of being fitted into the escape portion. The press-connecting connector according to claim 1, wherein the press-connecting connector is provided.   The press-contacting connector according to any one of claims 1 to 3, wherein the press-contacting blade has an arc shape.

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