JPH0122228Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a plug-in connector that can be connected to another electric wire by simply inserting one end of the electric wire.

[Prior art]

This type of plug-in connector has a structure in which a conductive member for connecting wires to each other and a spring piece for press-fitting the wires to the conductive member are installed inside a holder made of heat-resistant insulating material, and the wires to be connected are connected to each other. By simply peeling off the coating on the connection end and simply inserting the peeled part through the insertion opening of the holder, anyone can easily perform the wiring work, which has a great advantage.

As this type of connector, a structure as shown in FIGS. 1 and 2 a and b has been known. To explain this simply, the reference numeral 1 in the figure is a conductive plate formed by bending a plate-like member, and 2 is a leaf spring attached to the conductive plate 1 and having a spring piece 2a that is pressed against the bent top 1a. , these are arranged in a holder 3 made of a heat-resistant insulating material. Note that this example shows a type to which five electric wires can be plugged and connected.

Then, insert the electric wire 4 with the connection end peeled off into the inside of the holder 3 through the insertion port 3a, and then insert the peeled part 4a of the electric wire 4 through the hole 16 bored on the base side of the conductive plate 1. It is best to place it between the bent top 1a and the spring piece 2a and push it in with the spring piece 2a being bent. In this way, Figure 2 a
As shown in FIG. 2, the peeled portion 4a of the electric wire 4 is brought into contact with the bent top portion 1a of the conductive plate 1 from a direction perpendicular to the bent top portion 1a, and is pressed and held from above by the tip of the spring piece 2a. As a result, the electric wire 4 is electrically connected to the conductive plate 1. Then, for this conductive plate 1, the first
As shown in the figure, the wires are connected to each other by arranging a required number of wires 4 and connecting them as appropriate.

However, in such a conventional structure, the second
As is clear from Figure b, the electric wire 4 is connected to the conductive plate 1
Since the bent top 1a and the tip of the spring piece 2a are only connected by point contact, the contact resistance is large and it is difficult for current to flow.
Furthermore, there is a problem in that poor contact may occur depending on the state of insertion, which is not desirable in terms of making a highly reliable connection.

In particular, the above-mentioned connector is often commonly used for connecting two or more types of wires with different wire diameters, and therefore the hole 1b on the base side of the conductive plate 1 is formed larger than its maximum diameter. Therefore, it is impossible to make a connection with the electric wire at this hole portion 1b or any other portion, and it is desired that some kind of countermeasure be taken.

In addition, in the conventional connector described above, the conductive plate 1
Not only is there a processing problem when the wire is bent, but the contact resistance between the spring piece that presses the wire and the wire is the same as that on the conductive plate side, so an excessive current flows on one side of the spring, causing There was also a risk that the pressure force would be weakened.

[Summary of the idea]

The present invention was developed in view of the above circumstances, and the insertion hole into which the electric wire is inserted into the conductive plate has two positions, one on the electric wire insertion side of the conductive plate and the other on the edge of the hole on the leaf spring side. A non-circular hole is drilled so as to make contact with each other, and a leaf spring is attached along the surface of the conductive plate on the side opposite to the insertion hole so as to cover the hole, so that the hole is not supported by the edge of the insertion hole. In addition, the insertion end of the electric wire is pressed against the conductive plate side with a pressing piece at the tip of the leaf spring, and the conductive plate with the leaf spring attached is installed in the holder so that it can move freely while being tilted in the direction of insertion of the electric wire. The simple structure of arranging the wires increases the contact area of the wires with the conductive plate, reduces the contact resistance, makes it easier for current to flow, and not only makes it possible to make safe, appropriate and reliable connections, but also improves the molding of each part. The object of the present invention is to provide a plug-in connector that has advantages such as excellent workability and durability, and low cost.

〔Example〕

Hereinafter, the present invention will be explained in detail using embodiments shown in the drawings.

3 to 7a and 7b show an embodiment of the plug-in connector according to the present invention, and this embodiment shows a type that connects four electric wires.

In these figures, the plug-in connector, designated as a whole by reference numeral 10, includes a holder 12 made of a heat-resistant insulating material and having four wire insertion ports 11, a conductive plate 13 for connecting wires built into the holder 12, and a conductive plate 13 for connecting wires. Pressing piece 14a for wire pressure welding attached to
The holder 12 is composed of a leaf spring 14 having a holder 12 and a cap 15 that closes the open end of the holder 12 on the side opposite to the wire insertion port 11. Then, the connector 10 is stripped of its connection end, and an electric wire 16 (generally a single-core electric wire is used) is appropriately inserted to form a peeled part 16a, as shown in FIGS. 4a and 4b.
It is connected by a conductive plate 13 and a leaf spring 14 shown in FIG.

Here, first, the holder 12 and the cap 15 are
To briefly explain this with reference to FIGS. 3, 5a and 5b, and 6, the holder 12 has an approximately rectangular cylindrical shape with a horizontally long bottom, and has a closed front end 12a. The four electric wire insertion ports 11 are formed in a line, and the internal space 17 thereof communicates with the outside. Note that these insertion ports 11 are formed in a wrapper shape that expands outward, and are configured to appropriately guide an electric wire inserted from the outside into the holder 12. Further, at the inner end of the bottom of the internal space 17 of the holder 12, as shown in FIG. Above and below, stepped portions 18a and 18b are formed.
These step portions 18a and 18b function as support step portions that support one end of the conductive plate 13 to which a leaf spring 14, which will be described later, is attached, and also function as a guide when the conductive plate 13 is assembled into the holder 12. We are prepared.

In addition, long groove-shaped locking holes 19a, 19a are bored at the rear of both sides of the holder 12, while a cap 15, which is press-fitted to close the open end side of the holder 12, is formed at both sides. The locking hole 19
Locking protrusions 19b, 19 locked in a, 19a
b is integrally provided in a protruding manner. Further, at the inner end of the cap 15, there is a concave portion 15a where the tip of the electric wire 16 inserted from the aforementioned insertion port 11 escapes.
is recessed.

Now, according to the present invention, the conductive plate 13 incorporated into the holder 12 as described above can be assembled into the conductive plate 13 as shown in FIGS.
As shown in FIG. 2, a plate spring 14 made of phosphor bronze or the like is attached in parallel to the plate spring 14, which is formed of a plate-shaped conductive material such as pure copper tin plate and has a pressing piece 14a in parallel thereto. An insertion hole 20 having a non-perfect circular shape that can come into contact with the electric wire 16 is formed in the plate 13 at two positions on the insertion side and the spring side of the hole edge, and the insertion hole 20 is inserted into the opposite side of the electric wire 16. A leaf spring 14 is extended and attached to cover the closed side, and a conductive plate 13 to which this leaf spring 14 is attached is further attached.
is incorporated in the holder 12 so as to be freely movable during insertion in an inclined state in the insertion direction of the wire peeling portion 16a from the insertion hole 11.

That is, according to this embodiment, this conductive plate 13
As shown in FIG. 4a, the insertion holes 20 formed in the holder have a substantially rhombic shape, and four insertion holes 20 are arranged in a line facing the insertion opening 11 on the holder 12 side. What should be noted here is that these insertion holes 20 are formed sufficiently larger than the diameter of the electric wire 16 to be inserted, as is clear from FIGS. 7a and 7b, and as shown in FIG. , when the conductive plate 13 is inclined in the insertion direction in the holder 12 and is arranged to be freely movable when inserting the electric wire, the conductive plate 13 is configured so that it can contact the electric wire 16 at two positions at the edge of the prepared hole. Is Rukoto.

This will be explained in detail with reference to FIGS. 7a and 7b. As mentioned above, the insertion hole 20 having a substantially rhombic shape is
When the conductive plate 13 is tilted within the holder 12,
When viewed from the insertion direction of the electric wire 16, the pilot hole wire portion has an interval approximately equal to the diameter of the electric wire 16, and when the peeled part 16a of the electric wire 16 is inserted into this, the insertion side of the conductive plate 13 The upper hole edge and the spring-side lower hole edge are in contact at two positions with a predetermined interval α in the insertion direction of the electric wire 16, respectively, as shown in FIG. 7b. As shown in FIG. 7a, the contact state at a total of four locations is such that the electric wire 16 is further forward at a predetermined interval β in the insertion direction from the support position of the edge of the spring-side insertion hole 20. Pressing piece 14 of leaf spring 14 pressed against
As a result, the contact area between the electric wire 16 and the conductive plate 13 is increased compared to the conventional case, and the contact resistance can be reduced.

Further, as described above, the electric wire 16 is connected to the conductive plate 13.
According to the structure, each of these contacts is inserted into the insertion hole 20 and brought into pressure contact with the tip of the pressing piece 14a of the leaf spring 14, thereby making contact at four points on the insertion side and the opposite side (plate spring side) of the insertion hole 20. Another advantage is that the edge of the insertion hole 20 of the conductive plate 13 bites into the wire 16 side, preventing the wire 16 from being pulled out and ensuring reliable connector connection. Of course, the wire 16 can be removed by rotating the wire 16 in both directions and gradually pulling it out.

Note that the conductive plate 13 and leaf spring 14 described above
The holder 12 is designed so that the electric wire 16 can be properly and smoothly inserted and clamped.
The reason for this is easy to understand. Further, the leaf spring 14 is connected and supported at its upper end to the conductive plate 13 by a suitable connecting means 21, so that each pressing piece 14a extending with a length that can close the insertion hole 20 is connected to the electric wire. As a result, the electric wire 16 pressed toward the conductive plate 13 by the pressing piece 14a of the leaf spring 14 is bent by the insertion of the electric wire 16 into the insertion hole 20.
The peeling portion 16a is brought into contact with the hole edge of the insertion hole 20 on the insertion side and the leaf spring side at four points at two positions.

Furthermore, according to the insertion hole 20 exhibiting a diamond shape as shown in this embodiment, by making the center portion larger in the lateral direction, as shown in FIG. It is possible to deal with this.

Therefore, according to the configuration described above, the conductive plate 1
The leaf spring 1 has an insertion hole 20 formed in 3 in the predetermined shape described above, and further has a pressing piece 14a extending so as to close the insertion hole 20.
The advantage is that the contact area for the electric wire 16 can be increased and the contact resistance can be reduced by simply holding the electric wire 16 in the holder 12 with the electric wire 4 tilted in the insertion direction so as to allow some movement when the electric wire is inserted. be. Further, according to this embodiment, both the conductive plate 13 and the leaf spring 14 have a flat plate shape, and are simply formed with holes or slits, and furthermore, they are simply connected at one end. It has the advantage of being easy to mold and assemble.

Here, to briefly describe the assembly of this connector 10, after the leaf spring 14 is connected to the conductive plate 13, these are inserted into the holder 12 with the connected end first. At this time, these conductive plates 13
The connecting end of the leaf spring 14 may be inserted into either one of the support steps 18a or 18b within the holder 12. Then, in this state, let go of your hand, tilt the conductive plate 13 etc. as shown in FIG.
The cap 15 may be attached to the holder 12, and the conductive plate 13 and the like may be disposed at an angle so as to be able to move somewhat within the holder 12. Of course, conductive plate 1
3 into the holder 12 in the above-described state, it goes without saying that the cap 15 may not be used and other locking means may be used.

It should be noted that the present invention is not limited to the structure of the embodiment described above, and the shape, structure, etc. of each part may be modified or changed as appropriate.

For example, an insertion hole 20 drilled in the conductive plate 13
As shown in FIGS. 9a, b, and c, various modifications can be considered, such as an elliptical shape, a square shape, and a parallelogram shape. Furthermore, the conductive plate 13 is not limited to a plate-shaped plate as in the embodiment, but may have a partially curved shape, or may have a plate spring 14 securely fixed thereto, as shown in FIG. 10. Therefore, various modifications can be considered, such as forming one end 23 of it by folding it back.

[Effect of idea]

As explained above, according to the plug-in connector according to the present invention, the wire insertion hole formed by drilling in the conductive plate as a conductor formed of a plate material is formed on the wire insertion side of the conductive plate. and the edge of the hole on the side of the leaf spring, each having a non-circular hole that contacts the electric wire at two positions, and one end of the hole is connected along the surface of the conductive plate so as to close this hole. A leaf spring is attached, and the insertion end side of the electric wire is pressed against the conductive plate side by a pressing piece at the tip of the leaf spring than the support position by the edge of the insertion hole, and the electric wire Since the wires are assembled and arranged so that they can move freely while tilted in the direction of insertion, the contact area of the wires with the conductive plate is reduced compared to conventional methods, despite the structure being simple and superior in terms of workability and cost. It has great practical effects, such as significantly increasing contact resistance, reducing contact resistance, and making connections safe, appropriate, and reliable.

[Brief explanation of the drawing]

1 and 2 a and b are a schematic perspective view and a cross-sectional view of the main part for explaining a conventional example, and FIG. 3 is a cross-sectional view of the main part showing an embodiment of the plug-in connector according to the present invention. 4a and 4b are plan views and side views showing the conductive plate and leaf spring used in this, and 5a and 5b are
Similarly, b is a front view and a side sectional view of the holder, and the sixth
The figure is also a side view of the cap, Figures 7a, b, and 8 are diagrams for explaining the effects of the present invention, and Figures 9a, b, c, and 10 show modified examples of the present invention. FIG. 10... Plug-in type connector, 11... Plug-in port, 12... Holder, 13... Conductive plate, 14...
Leaf spring, 14a... Pressing piece, 16... Electric wire, 16
a...Peeling part, 17...Holder internal space, 20...
...Insertion hole.

Claims (1)

[Scope of utility model registration request] A holder 12 having a plurality of insertion ports 11 into which a plurality of electric wires 16 are inserted, and a hole on the electric wire insertion side and the opposite side to the insertion side, which is arranged in the internal space 17 of this holder 12 and into which each electric wire 16 is inserted. A conductive plate 13 having a plurality of non-circular insertion holes 20 that contact the electric wires at two positions on each edge thereof, and a conductive plate 13 that is connected to one end side of the conductive plate 13 and that is connected to the opposite side of the conductive plate 13. A wire pressing piece 14a on the tip side is provided along the insertion side surface and extends so as to cover each insertion hole 20, and each electric wire 16
The insertion end side of the conductive plate 1 is located at the tip side of the insertion hole 20 from the support position by the hole edge on the opposite insertion side.
The electric wire 16
A plug-in connector characterized in that the plug-in connector is assembled so as to be movable while tilted in the plug-in direction.