JP2571061Y2 - Plug-in connector - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug-in connector which can simply and appropriately connect one end of an electric wire to another electric wire by simply inserting the electric wire.

[0002]

2. Description of the Related Art In this type of plug-in connector, a conductor made of a conductive plate for connecting wires and a spring piece for pressing the wire against the conductive plate is provided inside a holder made of a heat-resistant insulating material. It has a structure as described above. And
According to such a plug-in type connector, anyone can easily perform the connection work by simply stripping the covering of the wire connection end to be connected and simply inserting the peeled portion from the insertion port of the holder. There have been known those having various structures, such as Japanese Patent Publication No. 1-222828.

[0003]

One of the necessities of the above-mentioned plug-in connector is that the peeled portion, which is the wire connection end, can be easily inserted into the holder, and after the plug-in connector has been inserted. In this state, there is a pressure-contact structure by the conductor of the electric wire, which secures the contact area by the press-contact at the peeling end of the electric wire and the conductor in this state, and can perform the electric connection with high reliability. .

That is, as such a conductor, a conductor constituted by a conductive plate and a leaf spring having a spring piece for pressing a peeled portion of an electric wire against the conductive plate has been conventionally used. However, in the conventionally known conductors, the ease of insertion of the inserted wire peeling portion, the secureness of electrical connection by securing the contact area and contact pressure, and the prevention of the inserted wire peeling portion from slipping out, Nothing that satisfies both has yet been proposed.

In particular, in fixing the base end of the leaf spring to the above-mentioned conductive plate, generally, a caulking piece is provided on a part of the conductive plate, and this is passed through a hole formed on the leaf spring side. In many cases, the caulking pieces are caulked and fixed. However, with such a fixing means by caulking,
The tip side of the leaf spring easily rises up with respect to the conductive plate,
As a result, a gap is formed between the leaf spring and the wire insertion hole of the conductive plate, and even if the wire is inserted, a problem that the leaf spring cannot be prevented from being bitten by the wire and cannot be prevented from coming off.

[0006] Furthermore, the angle between the front end of the leaf spring and the conductive plate that is fixed by caulking to the conductive plate in this manner is important in ensuring easy insertion of the electric wire and reliable prevention of the wire from coming off. is there. That is, if the angle between the conductive plate and the spring piece is set to be small in consideration of the insertability of the wire and the reliability of the electrical connection, the function of the spring piece to prevent the wire from coming off is impaired. If the above-mentioned angle is set to a large value so as to improve the bite of the wire into the electric wire and to reliably prevent the detachment, the wire is inserted between the conductive plate and the spring piece constituting the conductor of the electric wire. However, it is difficult to secure the contact area, and the electrical connection performance is impaired. Therefore, it is desired to take some measures that can satisfy both of these requirements.

[0007]

SUMMARY OF THE INVENTION In order to meet such a demand, a plug-in connector according to the present invention is arranged in a holder and press-clamps a peeled portion of an electric wire inserted from an electric wire insertion hole to form another connector. A conductor for making connection with an electric wire has a wire insertion hole, a receiving portion for supporting an electric wire to be inserted at one end thereof, and a bent portion for caulking which is folded back into a substantially U-shape at the other end thereof. A conductive plate that is bent and formed so as to be arranged at an angle, and a base end portion is swaged and fixed to a crimped bent portion at the other end side of the conductive plate to cover the wire insertion hole and conduct. A long and short piece of wire-pressing leaf springs extending toward one end of the plate, and a small hole provided in the base end side of these wire-pressing leaf springs. Insert the base end of the included leaf spring inside the crimped bending part on the conductive plate side. By caulking fixation is obtained by a protrusion retaining by caulking to fix in a state of entering into the stoma.

[0008]

According to the present invention, the base end portion having the small hole of the wire spring for pressure welding is inserted into the inside of the crimping portion on the conductive plate side, and the crimping portion is bent in this state. By caulking, a part of the caulked portion swells so as to enter the small hole at a portion corresponding to the small hole, and engages in the small hole as a retaining projection, so that the leaf spring can be moved from the conductive plate. Prevents slipping out, and secures by caulking by the caulking bending part while wrapping the leaf spring base end,
The tip of the leaf spring and the conductive plate can be assembled at a predetermined angle that does not cause a problem such as lifting.

[0009]

1 to 6 show an embodiment of a plug-in connector according to the present invention. In these figures, in this embodiment, a type in which three electric wires 1 are connected is shown. In addition, as these electric wires 1, a single-core electric wire is generally used, and the insertion ends to the connectors, which are the respective connection ends, are formed as peeling portions 2 by peeling off the insulating coating 1a, as is well known. Have been prepared.

As shown in FIGS. 1 and 2, the plug-in connector, generally designated by the reference numeral 10, has a holder 11 formed of a synthetic resin material having a heat-resistant and insulating property so as to have a substantially housing shape. And a cap 12 made of a synthetic resin material having heat-resistant insulation like the holder 11 so as to close the open end of the holder 11 which is open to the wire insertion end side. Three wire insertion holes 13 into which the peeling portion 2 of the wire 1 is appropriately inserted are formed.

The cap 12 is engaged with an appropriate stopper 15 while being fitted into the opening end of the holder 11, and is integrally formed. Further, the electric wire insertion port 13 formed in the cap 12 is formed in a substantially trumpet shape with a large diameter on the outer end side, and has such a shape that the electric wire 1 can be easily inserted.

Further, in the figure, reference numeral 16 denotes a substantially U-shaped cut formed on one side surface of the holder 11 to form the holder 11.
A piece for recognizing an elastically deformable electric wire insertion state which is extended in the insertion direction corresponding to each electric wire peeling portion 2 inserted into the inside,
The end of each of the recognition pieces 16 is engaged with the tip of the wire peeling portion 2 which is pressed and held by the conductor 20 inside the holder 11 and electrically connected to the recognition piece 16 to elastically deform the recognition piece 16 to the outside of the holder 11. An engaging portion 16a is provided.

In this manner, when the wire peeling portion 2 is inserted into the holder 11 from the insertion port 13 and pressed and held by the conductor 20, the electric wire peeling portion 2 becomes as shown in FIGS. 2 (a) and 1 (a). As is clear from the state shown in FIG.
The recognition piece engages with the engaging portion 16a on the tip side of the recognition piece 16 , and the recognition piece
16 is elastically deformed toward the outside of the holder 11,
The insertion can be confirmed visually or with a fingertip from the outside.

Reference numeral 20 designates another electric wire which is disposed in the interior space 14 which is closed by the cap 12 in the holder 11 so as to be slightly inclined in the electric wire insertion direction and presses and holds each electric wire peeling portion 2. (Not shown), the conductor 20 is electrically connected to the conductor 20 shown in FIGS.
As is clear from (a), (b) and (c), for example, a conductive plate 21 formed by bending a conductive plate material such as a tin-plated copper plate or the like into a required shape and this conductive plate A leaf spring material is provided so as to extend the distal end portions 22a and 23a into pressure contact with the wire peeling portion 2 which is attached to and held at a bent portion 21a as a receiving portion bent at one end thereof. Long and short spring pieces 22 and 2 for wire pressure welding consisting of
And 3.

Here, 21b in FIG.
A crimping bent edge of the conductive plate 21 for locking and holding the base end portions of the base plates 2 and 22 at the crimping bent portion 21c, and 24 allows the electric wire 1 to pass through the conductive plate 21. An electric wire insertion hole 25 formed in an oval shape or the like as described above is a guide portion bent and formed so as to guide the electric wire 1 into the insertion hole 24.

The two long and short wire pressing spring pieces 22 and 23 are made of a single leaf spring as is apparent from FIGS. 1 to 4 (a), (b) and (c). Is folded in two at the bending portion 27, and a slit is formed in each of the folded portions to form a spring piece corresponding to each electric wire 1. And
Each of the spring pieces 22 and 23 has a bent portion 27 which is a base end thereof, and a bent portion 21 for crimping the conductive plate 21.
In a state in which it is brought into contact with the bent edge 21b inside the c, it is fixed by caulking, and its front end covers the electric wire insertion hole 24 and extends toward one end of the conductive plate 21. It has become.

According to the present invention, as shown in FIGS. 4 (a) and 4 (b), the conductor 20 in the plug-in connector 10 having the above-described structure has two long and short electric wires. A small hole 28 is formed in the base end side of the spring pieces 22 and 23 for pressing.
And a spring piece 2 including these small holes 28.
6 (a) and 6 (b), the base ends (27) of the base plates 2 and 23 are swaged and fixed in a state where they are inserted into the inside of the bent portion 21c for swaging on the conductive plate 21 side. As a result, the retaining protrusions 29, 29 by caulking are formed into the small holes 28,
It has a feature in that it is configured so as to be able to be retained and fixed in a state where it is inserted into the inside 28.

According to such a configuration, the base ends (bent portions 27) having the small holes 28 of the spring pieces 22 and 23 for wire press contact are bent at the other end of the conductive plate 21 for crimping. The crimped bent portion 21c is bent and crimped in this state, so that a part of the crimped portion corresponds to the small hole 28 at the portion corresponding to the small hole 28.
The spring pieces 22 are bulged inward and engage with the small holes 28 as retaining protrusions 29 to prevent the spring pieces 22 and 23 from falling off the conductive plate 21.

Further, according to the caulking and fixing by the caulking bent portion 21c in a state where the base ends of the spring pieces 22 and 23 are wrapped, the receiving portion (on the conductive plate 21 side at the distal end side). 21a, 25) can be assembled with the spring pieces 22, 23 and the conductive plate 21 in a state where there is no problem such as floating between the conductors 21a, 25). It is possible to meet the demand for retaining by making a bite.

In this embodiment, the tip portions 22a and 23a of the two long and short spring pieces 22 and 23 are inserted into the wire peeling portion 2 held by the receiving portions 21a and 25 of the conductive plate 21. It is configured to be pressed at different positions in the direction.
In addition, an arc-shaped notch corresponding to the electric wire 1 is formed in these tip portions 22a and 23a.

According to such a configuration, the electric wire 1
When the stripped portion 2 which is the insertion end is inserted into the holder 11 and pressed and held by the conductor 20, the tip of the wire stripped portion 2 is inserted into two long and short spring pieces 22, 23 constituting the conductor 20. Since the short side has a small insertion resistance and the long side has a small angle with the conductive plate 21, it can be easily carried out. Since the electrical connection state can be obtained and the angle formed between the short side and the conductive plate is large, biting into the wire peeling portion 2 can be reliably performed, and the wire can be prevented from coming off.

In other words, the shorter spring piece 23 is
As shown in (a) of FIG. 1 and the like, a gap is formed between the insertion hole 24 and thus does not become an obstacle when the electric wire 1 is inserted. As is clear from FIG. 2), the wire peeling portion 2 is bitten with an appropriate bite to obtain a required retaining state. Further, the spring piece 22 which is the long one side is formed as shown in FIG.
(A), the receiving portion 21 of the conductive plate 21
The angle between the a and 25 is small, not only does not hinder the insertion, but also in the inserted state, it is press-contacted with a required contact area, and the electrical connection can be reliably performed.

The present invention is not limited to the structure of the embodiment described above, and the shape, structure, etc. of each part can be freely modified and changed as appropriate.
Various modifications are conceivable as the shape and structure of the cap 1, the cap 12, and the like. In the above-described embodiment,
A case was described in which a single leaf spring was used, which was bent through the bent portion 27, and slits were formed at appropriate positions to form the spring pieces 22 and 23. It is needless to say that the present invention is not limited to this, and may be configured by combining two long and short leaf springs.

[0024]

As described above, according to the plug-in connector according to the present invention, the conductor which is disposed in the holder and presses and holds the wire peeling portion inserted from the wire insertion hole to connect with another wire. Has a wire insertion hole, a receiving portion for supporting the wire to be inserted at one end thereof, and a bent portion for caulking which is folded back in a substantially U-shape at the other end, so that it is inclined and disposed in the holder. The conductive plate that is formed by bending and the long and short two pieces that extend to one end of the conductive plate by covering the wire insertion hole by fixing the base end to the crimped bent portion at the other end And a small hole is provided at the base end side of the wire pressure welding leaf spring, and the base end of the leaf spring including the small hole portion is crimped on the conductive plate side. By inserting it inside the bent part and caulking it and fixing it, the retaining projection by caulking is small Since so as to fix in a state where the enter, despite the simple and inexpensive structure,
Simply insert the base end of the wire spring with the small hole into the inside of the crimped portion for caulking on the conductive plate side, and fix it by bending and caulking. It is engaged in the hole to prevent the leaf spring from falling off from the conductive plate, and by crimping and fixing by the crimping bent part with the base end of the leaf spring wrapped, there is no problem such as lifting up It is possible to assemble the leaf spring tip and the conductive plate at an angle of, and it is practically superior in that it can satisfy the demands of easy insertion of electric wires, reliability of electrical connection, and retaining by proper biting. There is.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a plug-in connector according to the present invention, in which (a) is a sectional view of a main part showing a state where an electric wire is inserted,
(b) is a plan view thereof.

FIGS. 2A and 2B show a normal state in which no electric wire is inserted in the plug-in connector according to the present invention, wherein FIG. 2A is a sectional view of a main part, FIG. 2B is a schematic plan view, and FIG. .

FIG. 3 is a schematic diagram showing a schematic configuration of a conductor characterizing the present invention.

4A and 4B show an example of a leaf spring constituting a conductor according to the present invention, wherein FIG. 4A is a schematic sectional view and FIG. 4B is a schematic side view.

5A and 5B show an example of a conductive plate constituting a conductor according to the present invention, wherein FIG. 5A is a schematic cross-sectional view, FIG.
(c) is a schematic bottom view.

FIG. 6 shows an assembled state of a conductor characterizing the present invention,
(a) is a diagram for explaining an assembling method, and (b) is an enlarged view of a main part in an assembled state.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 wire 1a coating 2 wire peeling part 10 plug-in connector 11 holder 12 cap 13 insertion port 20 conductor 21 conductive plate 21a bent part (receiving part) 22 spring piece (leaf spring) 23 spring piece (leaf spring) 24 wire insertion Hole 25 Guide part (receiving part)

Claims (1)

(57) [Scope of request for utility model registration] 1. A plug-in connector in which a peeled portion of an electric wire inserted from an electric wire insertion hole is pressed and clamped by a conductor provided in a holder to connect with another electric wire. It has an electric wire insertion hole, a receiving portion for supporting an electric wire to be inserted at one end thereof, and a bent portion for caulking which is folded back into a substantially U-shape at the other end, and is bent so as to be inclined and disposed in the holder. The base plate is caulked and fixed to the formed conductive plate and the crimped bent portion at the other end of the conductive plate so as to cover the wire insertion hole and extend toward one end of the conductive plate. And a small hole is provided at the base end side of the wire pressure contact leaf spring, and the base end of the leaf spring including the small hole portion is formed. Part is swaged at the bent part for swaging on the conductive plate side Plug-type connector to by being constant, characterized in that the convex portion retained by caulking is fixed in a state that has entered into the stoma.