JP2016110884A - Wire relay connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire relay connector by which work for fixing a wire into a press-contact groove can be easily implemented with a finger tip even if a housing is small, and the housing and the wire can be surely fixed.SOLUTION: The wire relay connector comprises a contact body 1 and a housing 2. In the contact body 1, a contact part and the press-contact groove with which a covered conductor is brought into press-contact are formed. In the housing 2, a first cylinder part that covers the contact part and a second cylinder part that covers the press-contact groove are formed from thin parts integrally and in a rotatable manner. At a distal end side of the second cylinder part, a lock projection 25 and a lock hole 26 are provided for locking a second cylinder part lid and a second cylinder part body. In the contact body 1 at a side of the press-contact groove, a first tip part 12 is formed and in the second cylinder part body, a thick part 27 is formed for engaging the first tip part 12 therein.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an electric wire relay connector used for connecting two electric wires to energize them, and more specifically, a metal made for connecting to electric wires in a small housing formed of an insulating resin. It is related with the electric wire relay connector of the structure which accommodated this contact main body.

2. Description of the Related Art Conventionally, various types of wire relay connectors for connecting and energizing electric wires have been manufactured and used.
A connector for connecting fine weak wires for communication cables, which employs a pressure contact energization method that presses the coated wire into a pressure contact groove formed in a predetermined width without peeling off the cable sheath and energizes it. Are known.
In addition, in order to unify the shape of a pair of connectors to be connected, a connector having a hermaphroditic structure formed so that the two connectors can be fitted and connected with the left and right sides and the top and bottom being reversed to each other is also known.

And the structure of the connector which employ | adopted both the press-contacting energization system mentioned above and the hermaphrodite structure is disclosed by patent document 1 mentioned later, for example.
That is, the wire relay connector described in the document includes a housing body, a housing lid body, and a contact body that are hermaphroditic. The contact main body is molded by a single metal plate, a pressure contact groove for electrical connection with the electric wire is disposed on the rear side, and a contact portion that is attached to and detached from the other connector is disposed on the front side. Further, a retaining protrusion for preventing the contact body from coming out of the housing by being engaged with an engaging step provided on the housing body is formed at these intermediate portions.

  The housing body is sized to accommodate the contact body inside, and has an opening at a position facing the pressure contact groove. And in the state where the axial direction of the electric wire is placed so as to be orthogonal to the pressure contact groove, the housing lid is closed and fixed by closing the housing lid from above the opening and pressing, When the electric wire is pushed into the pressure contact groove, the coating is peeled off and the contact body is made conductive. In addition, from the viewpoints of facilitating pressing and impact resistance and mechanical strength, a hard and strong polyester-based resin such as polycarbonate is adopted as a material for the housing body and the housing lid.

JP 2012-129125 A

  The wire relay connector described in Patent Document 1 has a structure in which a contact body is surrounded by two members, a housing body and a housing lid, and because it is a hermaphroditic, it is easy to manufacture and only one type of mold is sufficient. Is excellent. Further, in use, it is excellent in that it can be electrically connected to the contact body by removing the sheath of the covered electric wire by a one-touch operation in which the housing lid is positioned and pressed against the housing body.

However, depending on the use of the wire relay connector, it is required to wire in as small a space as possible (for example, 15 mm long and 3 mm square), and it is necessary to further reduce the size. For this purpose, it is necessary to make the housing as small as possible, and it is desirable that the electric wire and the contact main body can be easily press-contacted by a one-touch operation as in the case of a conventional connector. Further, even if the housing is downsized, it is necessary to fix the contact main body so that it does not easily come off the housing, and it is necessary to devise a fixing method between them.
When the housing body and the housing lid are reduced in size, the work of locking the housing lid to the housing body with the fingertips while placing the electric wire in the pressure contact groove is performed, but this becomes a finer work as the housing becomes smaller. . Further, if the housing lid and the housing main body are formed as separate bodies, an operation of aligning the two in a state where the electric wires are placed is necessary, so that the wiring connection operation is difficult and labor is required.

  Therefore, the present invention can easily perform the work of fixing the electric wire to the press contact groove with a fingertip even in a small housing, and after fixing to the press contact groove, the housing and the electric wire can be securely fixed so that the wire can be removed. An object is to provide a wire relay connector having a difficult structure.

  The electric wire relay connector of the present invention made to solve the above-mentioned problems is composed of a contact body made of a good conductor metal and a housing made of an insulating resin that houses the contact body, and is electrically connected to the other side connector. The contact body is formed with a contact portion for attaching to and detaching from the other side connector on the front side, and a pressure contact groove for press-contacting the covered wire on the rear side, and the housing includes the contact portion A first cylinder part covering the pressure contact groove and a second cylinder part covering the pressure contact groove are integrally formed via a thin part, and the second cylinder part is a second cylinder part cover body covering the upper side of the pressure contact groove; The second cylindrical part body that covers the side surface and the bottom surface of the press-contact groove is divided into two parts, and each of the second cylindrical part body and the second cylindrical part body are configured to be turnable with the thin part as a fulcrum. And lock A locking projection and a locking hole are provided on the distal end side of the second cylindrical portion, and further, a first cutting edge portion is formed on the contact main body on the pressure contact groove side, and the second cylindrical portion main body includes the first cutting edge portion. A thick part for biting the one blade edge part is formed.

According to the present invention, in the housing, the first cylindrical portion on the contact portion side, the second cylindrical portion lid body on the pressure contact groove side, and the second cylindrical portion main body are integrally formed via the thin portion. The second cylindrical portion lid and the second cylindrical portion main body can be turned with respect to the first cylindrical portion with the thin portion as a fulcrum. Therefore, the contact portion side of the contact body is inserted into the first tube portion of the housing with the second tube portion lid and the second tube portion main body separated from each other, and the second tube portion body is swung in this state. When approaching the contact body, the first cutting edge part eventually bites into the thick part (of the insulating resin) of the second cylindrical part body, and the cutting edge part is stuck in the insulating resin. The contact main body and the second cylinder main body are firmly fixed by receiving resistance from the thick wall portion and not returning to the original state before turning.
Next, when the covered electric wire is placed in the pressure contact groove and the second cylindrical portion lid is turned with the thin portion serving as a fulcrum, the coated electric wire is eventually pressed by the second cylindrical portion lid and pushed into the pressure contact groove, An electric wire is electrically connected to the contact body. And a contact main body is accommodated in a housing by fixing a 2nd cylinder part main body and a 2nd cylinder part cover body by a latching protrusion and a latching hole.

In this way, if the first cutting edge is formed near the pressure contact groove of the contact body and the cutting edge is stuck and embedded in the thick wall portion of the housing, the swiveled second cylindrical body can return to the original position before turning. It can be securely fixed after it disappears.
In addition, since the second cylindrical portion lid is formed integrally with the first cylindrical portion, positioning is not necessary, and the second cylindrical portion is formed by the locking protrusion and the locking hole simply by turning the thin portion as a fulcrum. Since it can be made to latch with a part main part, an electric wire can be supported with one finger | toe, and the operation | work which press-contacts a 2nd cylinder part cover body and a 2nd cylinder part main body with the other finger | toe can be implemented easily.

Further, in the above invention, a notch is formed in a lower portion of the contact main body on the pressure contact groove side, and an engaging protrusion that engages with the notch when the second cylindrical portion main body is turned is provided in the second cylinder. You may make it form in a part main body.
With this configuration, the front and rear of the contact body in the housing are not only fixed by the first cutting edge portion and the thick wall portion described above, but also by the engagement of the notch in the lower portion of the contact body and the engagement protrusion of the second cylindrical portion body. Movement in the direction can be reliably prevented.
In addition, since the contact portion side of the contact body can be inserted into the first tube portion first and can be engaged by turning, the presence of the engaging protrusion is obstructive when the contact body is inserted into the first tube portion. Never become. Therefore, the engagement protrusion and the notch can be engaged with each other with a simple structure in which a notch is simply provided in the contact body without providing a mechanism for avoiding contact with the engagement protrusion at the time of insertion.

In the above invention, a second cutting edge portion that bites into the second cylindrical portion lid body is formed on an upper portion of the contact body on the pressure contact groove side, and the second cutting edge portion is formed on the second cylindrical portion lid body. A thick portion for biting may be formed.
By providing the second cutting edge part and the thick part also between the second cylindrical part cover body and the contact body, the second cutting edge part bites into the thick part (of the insulating resin) of the second cylindrical part cover body. Since the second cutting edge portion is stuck in the insulating resin and the second cutting edge portion receives resistance from the thick wall portion and cannot return to the original state before turning, the contact main body and the second cylindrical portion lid body Is firmly fixed. In addition, the second cylindrical part body and the second cylindrical part lid body can be fixed in cooperation with the locking projections and the locking holes, and can be fixed in cooperation with each other, so that a strong pressure contact state can be maintained. Become.

According to the present invention, the cutting edge portion is formed on the contact main body on the pressure contact groove side, and the cutting edge portion is fixed by being stuck in the rotating housing, so that the contact main body can be easily inserted and the housing can be downsized. In addition, the contact main body and the housing can be reliably fixed by the resistance caused by the cutting edge portion.
Furthermore, since the housing is integrally formed, it is only necessary to turn the portion of the second cylindrical portion lid when pressing the covered electric wire with the second cylindrical portion lid, so positioning is unnecessary and the fingertips are used. It is possible to easily perform the pressure welding operation.

The figure which shows a contact main body. The figure which shows a housing. The perspective view which shows the housing insertion state by the side of the contact part of a contact main body. The perspective view which shows the electric wire relay connector before electric wire pressure welding. The perspective view which shows the electric wire relay connector after electric wire pressure welding. The perspective view which shows the connection state of the male and female body electric wire relay connectors.

  Embodiments of the present invention will be described below with reference to the drawings. The wire relay connector A according to the present invention connects a pair of hermaphroditic connectors, and the contact body is formed and processed by a single metal plate made of a good conductor metal (specifically, phosphor bronze). 1 and a housing 2 made of an insulating resin, which is inserted to cover the whole. Although the detailed structure will be described later, since the blade edge part formed on a part of the contact body 1 needs to bite into the resin of the housing 2 and stab it, the insulating resin used for the housing 2 is the contact body 1. It is necessary to use a resin material in which the cutting edge portion formed on the surface is easy to bite. Therefore, an insulating resin such as nylon is more preferable than a hard and sturdy polyester insulating resin such as polycarbonate.

First, the structure of the contact body 1 will be described with reference to FIG.
1A is a front view of the contact body 1, FIG. 1B is a plan view, FIG. 1C is a bottom view, FIG. 1D is a rear view, and FIG.
The contact body 1 includes a pressure contact groove side L on the rear side in the longitudinal direction (left side in FIG. 1A) and a contact portion side M on the front side in the longitudinal direction (right side in FIG. 1A).

  The pressure contact groove side L is formed in a U-shape having an opening at the top, and a U-shaped wall is formed by a pair of opposed parallel walls 10a and a bottom wall 10b, and the parallel wall 10a is crossed inside. Thus, an intermediate wall 10c provided with the pressure contact groove 11 is formed. When the covered electric wire is press-fitted into the press contact groove 11, the electric wire coating is peeled off, the core wire is exposed, and is electrically connected to the contact body 1.

  Further, a corrugated first cutting edge portion 12 is formed on the lower side of the rear end of the parallel wall 10a on the pressure contact groove side L. Further, a second cutting edge portion 13 formed of a notch that is constricted inward is formed on the front side in the longitudinal direction of the press groove 11 and on the upper side of the parallel wall 10a. These first blade edge portion 12 and second blade edge portion 13 are susceptible to resistance by corrugated or constricted blades after biting into a thick portion made of an insulating resin provided in housing 2 to be described later. In this way, it can be firmly fixed. Further, a notch 14 is formed on the lower side of the parallel wall 10a, which is an intermediate position between the first cutting edge portion 12 and the middle wall 10c, and the second cylindrical portion is engaged with an engaging projection 28 described later. The front and rear positions of the contact body 1 with respect to the body 22b are determined.

The contact portion side M is a portion that is electrically connected to the contact main body 1 of another wire relay connector A ′ (see FIG. 6 described later) that is hermaphroditic, and has two odd-shaped protruding pieces 15 that continue from the parallel wall 10a. , 16.
The intervals and shapes of the protruding pieces 15 and 16 are determined so that the protruding pieces 15 and 16 of the same shape in the other contact body 1 are in elastic contact with each other and the electrical connection is reliably maintained.

Next, the structure of the housing 2 will be described with reference to FIGS.
2A is a front view of the housing 2, FIG. 2B is a plan view, FIG. 2C is a bottom view, and FIG. 2D is a left side view.
3A and 3B are perspective views showing a state where the contact body 1 is inserted into the housing 2, wherein FIG. 3A is a view seen from the rear side, and FIG. 3B is a view seen from the front side.

The housing 2 accommodates the contact body 1 and insulates it from the outside, and here, a resin material made of nylon is used.
The housing 2 is roughly divided into a first cylinder part 21 and a second cylinder part 22 (divided into a second cylinder part lid 22a and a second cylinder part body 22b). The first cylinder part 21, the second cylinder part lid 22a, and the second cylinder part main body 22b are connected so as to form an integral structure via the thin part 23, and are molded so as to form a T shape as a whole. Has been.

  The first cylinder portion 21 is hollow so that the contact portion side M (see FIG. 1) of the contact body 1 can be inserted. In addition, the box body is provided with a step 24 so that a half is a large portion and the rest is a small portion along the longitudinal direction so that the other side connector of the hermaphrodite can be fitted.

  The second cylindrical portion lid 22a and the second cylindrical portion main body 22b can be turned around the thin portion 23 as a fulcrum, respectively, and a locking projection 25 provided on the distal end side of the second cylindrical portion lid 22a, A state in which the first cylindrical portion 21, the second cylindrical portion main body 22b, and the second cylindrical portion lid 22a are in contact with each other by locking the locking hole 26 provided on the distal end side of the second cylindrical portion main body 22b. It is supposed to be fixed with.

  A thick portion 27 is formed on the inner side of the second cylindrical portion main body 22b at a position where the second cylindrical portion main body 22b is swung in contact with the first cutting edge portion 12 of the contact main body 1. The first cutting edge portion 12 bites in. Further, a protrusion 28 is formed at a position where the second cylindrical portion main body 22b is in contact with the notch 14 in a state where the second cylindrical portion main body 22b is swung, and the protrusion 28 enters the notch 14 of the contact main body 1, whereby the second cylindrical portion. The position of the contact main body 1 in the front-rear direction with respect to the main body 22b is determined. Furthermore, a guide groove 30 for supporting the covered electric wire is formed.

  A thick part 29 is formed inside the second cylindrical cover 22a at a position where it contacts the second cutting edge 13 of the contact body 1 in a state where the second cylindrical cover 22a is turned. The second cutting edge portion 13 bites into here. Moreover, the protrusion 31 for pushing a covered electric wire into a groove | channel is formed in the front and back upper positions on both sides of the press-contact groove 11 in the state which turned the 2nd cylinder part main body 22b. Furthermore, a guide groove 30 for supporting the covered electric wire is formed.

Next, the usage state of the wire relay connector A will be described.
FIG. 4 is a perspective view showing a state when the wire relay connector A is shipped (that is, a state before the covered wire is pressed and electrically connected), and (a) is a perspective view seen from the rear side. b) is a perspective view seen from the front side.
The contact portion side M of the contact main body 1 is inserted into the first cylindrical portion 21 of the housing 2 and bites into the thick portion 27 of the second cylindrical portion main body 22b in which the first cutting edge portion 12 on the pressure contact groove side L is turned. . At this time, a restoring force is exerted on the second cylindrical portion main body 22b so as to return to the original state before turning (see FIG. 3) by the thin portion 23, but the thick portion 27 of the first cutting edge portion 12 is applied to the second cylindrical portion main body 22b. The resistance generated by the bite wins and is fixed as it is. Therefore, it is shipped in a T-shaped form with the second cylinder lid 22a open.

When connecting the covered electric wire to the wire relay connector A, the covered electric wire is placed on the guide groove 30 and the pressure contact groove 11 and pressed so that the tip of the covered wire is inserted over the pressure contact groove 11.
Specifically, first, the covered electric wire is supported by a finger on one hand side. Subsequently, while supporting the second cylinder portion main body 22b with the thumb of the other hand, the second cylinder portion lid body 22a is turned with the index finger. After that, when the protrusion 31 comes into contact with the covered electric wire, it receives resistance, but continues to turn. Eventually, the second cutting edge 13 bites into the thick part 29 and at the same time the locking projection 25 enters the locking hole 26, and the second cylindrical part lid 22a and the second cylindrical part main body 22b come into contact with each other. It is fixed by the protrusion 25 and the locking hole 26. At this time, since the second cutting edge portion 13 bites into the thick portion 29 and a resistance force is generated, the restoring force of the thin portion 13 is also excellent for the second cylindrical portion lid 22a and is fixed as it is.

5A and 5B are perspective views showing the wire relay connector A in a state in which the covered electric wire is press-contacted, where FIG. 5A is a perspective view seen from the rear side, and FIG. 5B is a perspective view seen from the front side. In addition, illustration was abbreviate | omitted about the electric wire.
In this state, not only the locking protrusion 25 and the locking hole 26 are fixed inside the connector, but also the resistance force due to the biting of the first blade edge portion 12 and the second blade edge portion 13 is exerted. The one cylinder part 21 and the second cylinder part 22) are firmly fixed.

  FIG. 6 is a perspective view showing a connection state of a pair of hermaphroditic wire relay connectors A and A ′. The wire relay connectors A and A ′ are coupled so that the step portions 24 are in contact with each other. At this time, the protruding pieces 15 and 16 (see FIG. 1) of the contact main body 1 are elastically contacted to be electrically connected. Will come to be.

As mentioned above, although typical embodiment of this invention was described, this invention is not limited to these, It can implement by changing suitably in the range which does not deviate from the meaning of invention.
For example, in the above embodiment, the connector is a hermaphroditic connector, but when the mold is formed separately, the contact portion may not be hermaphroditic. Also, the shape of the protruding piece that performs electrical connection with the other connector is not particularly limited.
In the above-described embodiment, the two cutting edge portions 12 and 13 are formed on the contact main body 1. However, if at least one cutting edge portion is provided on the contact main body 1 and is fixed to the second cylindrical portion main body 22b, the shipment is performed. Since the contact body 1 and the housing 2 can be fixed sometimes, the effect of the present invention can be obtained.

  INDUSTRIAL APPLICABILITY The present invention can be used for an electric wire relay connector that peels and connects a covered electric wire.

A wire relay connector 1 contact body 2 housing 10a parallel wall 10b bottom wall 10c middle wall 11 pressure contact groove 12 first blade edge part 13 second blade edge part 14 notch 15 protruding piece 16 protruding piece 21 first cylinder part 22 second cylinder part 22a 2nd cylinder part cover body 22b 2nd cylinder part main body 23 Thin part 24 Step part 25 Locking protrusion 26 Locking hole 27 Thick part 28 Projection 29 Thick part 30 Guide groove 31 Protrusion part

Claims (3)

It consists of a contact body made of a good conductor metal and a housing made of an insulating resin that houses the contact body, and is an electric wire relay connector for electrical connection with the other side connector,
The contact body is formed with a contact part for attaching and detaching with the other side connector on the front side, and a pressure contact groove for pressing the covered electric wire on the rear side,
In the housing, a first cylinder portion that covers the contact portion and a second cylinder portion that covers the pressure contact groove are integrally formed via a thin portion, and the second cylinder portion covers the upper side of the pressure contact groove. It is divided into a two-cylinder lid and a second cylinder main body that covers the side surface and bottom surface of the press-contact groove, each of which is configured to be turnable with the thin-walled portion as a fulcrum, and the second cylinder lid And a locking projection and a locking hole for locking the second cylindrical part body are provided on the distal end side of the second cylindrical part,
Further, the first cutting edge portion is formed in the contact main body on the pressure contact groove side, and the thick portion for biting the first cutting edge portion is formed in the second cylindrical portion main body. Wire relay connector.   A notch is formed in the lower part of the contact main body on the pressure contact groove side, and an engaging projection that engages with the notch when the second cylindrical main body is turned is formed in the second cylindrical main body. The electric wire relay connector according to claim 1.   A second cutting edge portion that bites into the second cylindrical portion lid body is formed on the upper portion of the contact body on the pressure contact groove side, and the second cutting edge portion is bitten into the second cylindrical portion lid body. The wire relay connector according to claim 1, wherein a thick portion is formed.

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