JPH05152012A - Wire connection device - Google Patents

Abstract

PURPOSE:To dispense with peeling a covering during the process of wire connection, and facilitate the wire connection without a jig or a tool. CONSTITUTION:In a connection metal fitting 32, a connection piece 34 is bent at a right angle on one end of an approximately rectangular conduction piece 33. A connection spring piece 35 is bent back from the tip of the connection piece 34 to the conduction piece 33 side, the connection spring piece 35 makes an acute angle with the conduction piece 33 on the connection piece 34 side, and a wire insertion hole 37 is formed in the center of the conduction piece 33 side base portion of the connection piece 34 so that a wire 38 can be inserted without peeling off a covering 39 and without exposing a core wire 40. A blade portion 41, which pierces the covering 39 of the wire 38 so as to touch the core wire 40, is formed at the tip of the connection spring piece 35, and the blade portion 41 is formed so that the acute angle edge 42 of the tip thereof comes to the far side of the wire 38 and the obtuse angle edge 43 of the tip thereof comes to the near side of the wire 38.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire connecting device capable of connecting electric wires by a simple operation without using a jig or a tool.

[0002]

2. Description of the Related Art As a wire connection device for connecting a power supply wire such as a VVF cable and wiring in an electric appliance such as a lighting appliance, a wire connecting device as shown in FIG. 6 has been conventionally known. The electric wire connecting device 1 is a so-called quick-connect terminal, and is a conductive metal fitting 2 in which a copper alloy is formed into a substantially U-shaped cross section, and the conductive metal fitting 2
And a locking spring 3 formed by bending a stainless steel spring material held by the above. Then, between the connecting surface 4 of the conductive metal fitting 2 and the locking piece 5 and the contact piece 6 facing the connecting surface 4, the coating 8 at the end of the electric wire 7 is peeled off with a wire stripper or the like, and the copper core wire 9 is inserted. Then, the core piece 9 of the electric wire 7 is pressed against the connecting surface 4 of the conductive fitting 2 by the locking piece 5 and the contact piece 6 while the locking piece 5 of the locking spring 3 prevents the electric wire 7 from connecting to the conductive fitting 2. ing. The electric wire 7 connected to the conductive fitting 2 is a soldering terminal 10 formed at one end of the conductive fitting 2.
Is connected to an electric wire (not shown).

This electric wire connecting device 1 has an advantage that contact pressure can be applied by a locking spring so that the connection is reliable and can be used for connecting a power supply electric wire such as a VVF cable through which a relatively large current flows. The coating 8 of the electric wire 7 must be peeled off in advance, a tool for peeling the coating 8 is required, and there is a problem that connection of the electric wire 7 takes time.

On the other hand, the electric wire connecting device 11 shown in FIG.
Is conventionally known. This wire connecting device 11 is known as a pressure contact terminal, and has a connecting piece 13 formed by bending a conductive metal fitting 12 made of a copper alloy thin plate in the vicinity of one end into a substantially L shape and further folding back the tip thereof. , The guide portion 14 that is open toward the folded-back portion and is inclined toward the opening
The connection groove 15 having the above is provided. In the electric wire connecting device 11, the inclined surface of the guide portion 14 has the cutting blade 16
When the electric wire 17 is positioned and pushed in by a jig or a tool, the coating 18 of the electric wire 17 is first cut open by the cutting blade 16. Then, when it is further pushed in, the exposed core wire 19 is held by being held in contact with the side edge of the connection groove 15 so as to be sandwiched, and the electric wire 17 is connected. The electric wire 17 connected to the conductive fitting 12 is connected to an electric wire (not shown) connected to a soldering terminal 20 formed at one end of the conductive fitting 12.

This wire connecting device 11 has the advantage that it is not necessary to remove the coating of the wire 17 in advance, and it does not require much labor to connect the wire 17, but a dedicated jig for pushing the wire 17 is used. There is a problem that it is necessary and that a considerably large force needs to be applied when inserting the core wire 19 into the connection groove 15 of the connection piece 13.

Further, as a conventional example of the electric wire connecting device, Japanese Utility Model Laid-Open No. 62-2164 discloses an electric wire connecting device which is connected to the core wire of the electric wire by a spring without the need to strip the coating of the electric wire. As shown in FIG. 8, this wire connecting device 21 accommodates a spring-like connecting piece 23 made of a conductive metal thin plate spring in an insulative housing 22, and the base portion of the spring-like connecting piece 23 is narrowed. Is formed in a U-shape, and both ends of the spring-like connecting piece 23 are bent inward, and a sharp blade portion 27 that penetrates the coating 25 of the electric wire 24 and contacts the core wire 26 is formed at the both ends of the spring-like connecting piece 23. It was done. In the electric wire connecting device 21, the blade portion 27 of the spring-shaped connecting piece 23 penetrates the covering 25 of the electric wire 24 and comes into contact with the core wire 26 only by inserting the electric wire 24 without peeling the covering 25 and then slightly pulling it out. Connection is made.

The electric wire connecting device 21 has an advantage that it is not necessary to remove the coating 25 of the electric wire 24 and the electric wire connection does not require labor. However, in this wire connection device 21,
The blade portion 27 of the spring-like connecting piece 23 is formed such that the sharp edge 28 at the tip is close to the electric wire 24 and the obtuse edge 29 is far from the electric wire 24, so that the sharp edge 28 surely causes the blade portion 27 to bite into the coating 25. Therefore, there is a problem that the blade portion 27 may bite into the core wire 26 and damage the core wire 26.

[0008]

The problem to be solved is to realize an electric wire connecting device which does not need to strip the coating when connecting electric wires and does not require jigs or tools for electric wire connection.

[0009]

SUMMARY OF THE INVENTION According to the present invention, when the tip is close to the wire insertion direction, the wire is inserted and then withdrawn a little, the wire penetrates through the coating of the wire and contacts the core wire of the wire to connect the wire. An electric wire connecting device including a conductive metal piece having a connecting piece, wherein an obtuse angle edge is formed on a side of a tip of the connecting piece of the conductive metal piece close to the electric wire, and the obtuse angle edge contacts the core wire of the electric wire.

[0010]

1 to 3 show an embodiment of the present invention, which will be described below with reference to the drawings.

The electric wire connecting device 31 is provided with a conductive metal fitting 32 formed by bending one end of a substantially rectangular plate made of a conductive thin plate spring material such as copper alloy. In the conductive metal fitting 32, a connecting piece 34 is bent at a substantially right angle and connected to one end of a substantially rectangular conductive piece 33, and a connecting spring piece 35 is folded back from the tip of the connecting piece 34 to the conductive piece 33 side. Piece 35 is connecting piece 3
An acute angle is formed between the conductive piece 33 and the conductive piece 33 on the fourth side, and a soldering terminal 36 is formed near the other end of the conductive piece 33 for connecting wiring (not shown) such as in-apparatus. Conductive piece 33 of connecting piece 34
An electric wire insertion hole 37 is formed in the center of the side base portion so that the electric wire 38 can be inserted without peeling off the coating 39 to expose the core wire 40. A blade portion 41 that penetrates the coating 39 of the electric wire 38 and comes into contact with the core wire 40 is formed at the tip of the connection spring piece 35, and the blade portion 41 has an obtuse edge 42 on the side where the sharp edge 42 at the tip is far from the electric wire 38. 43 is formed so as to be closer to the electric wire 38. This conductive metal fitting 32 is
With the electric wire 38 connected, only the obtuse angle edge 43 of the blade 41 contacts the core wire 40 of the electric wire 38.

When connecting the electric wire 38 to the electric wire connecting device 31, first, the tip of the electric wire 38 is passed through the electric wire insertion hole 37 in a state where the coating 39 is not peeled off, and the connecting spring piece 35.
Is pushed upward to clamp the electric wire 38 between the connection spring piece 35 and the conductive piece 33. Next, when the electric wire 38 is pulled back, the blade portion 41 at the tip of the connection spring piece 35 is thin as a whole, and thus penetrates the coating 39 of the electric wire 38 to penetrate the coating 39.
The blade portion 41 of the connection spring piece 35 contacts the core wire 40 at the obtuse edge 43 to be connected.

In the electric wire connecting device 31, it is possible to easily connect the electric wire 38 without needing to peel off the coating 39 in advance and without using a jig or a tool, and the connecting spring piece 35 comes into contact with the core wire 40 of the electric wire 38. Therefore, the blade portion 41 of the connection spring piece 35 does not bite into the core wire 40, and the connection can be reliably performed.

FIG. 4 shows another embodiment of the present invention. In this wire connecting device 51, a conductive metal fitting 53 is housed in an insulative housing 52, and the tip of the conductive metal fitting 53. The connecting piece 54 formed on the outer surface of the housing 52 is pushed inward with an operating tool 55 such as a push button exposed on the outer surface of the housing 52, and the blade portion 56 at the tip of the connecting piece 54 is bitten into the coating 58 of the electric wire 57 to penetrate the blade. The part 56 is brought into contact with the core wire 59 for connection. Also in this case, the blade portion 56 is formed with an accurate edge and an obtuse edge as in the previous embodiment, and the core wire 59 is in contact with the obtuse edge.

FIG. 5 shows still another embodiment of the present invention. This wire connecting device 61 is constructed in the same manner as the first embodiment as a whole, but the conductive metal fitting 62 is made of stainless steel or the like. Clad material composed of the spring material layer 63 and the highly conductive material layer 64 of copper or the like. Here, 65 is an electric wire, 66 is a coating, and 67 is a core wire.

[0016]

As described above, the electric wire connecting device of the present invention can be easily connected without the need to remove the coating in advance when connecting the electric wires, without the need for jigs or tools, and to have the connecting piece on the core wire of the electric wire. The contact is made at an obtuse-angled edge, and the connecting piece does not bite into the core wire, so that the connection can be made securely.

[Brief description of drawings]

FIG. 1 is a perspective view showing a usage state of an electric wire connecting device of the present invention.

FIG. 2 is a cross-sectional side view showing a usage state of the electric wire connecting device of the present invention.

FIG. 3 is a sectional side view of a main part of the electric wire connecting device of the present invention in a use state.

FIG. 4 is a perspective view of a main part of another wire connection device of the present invention.

FIG. 5 is a cross-sectional side view of a main part of a still further electric wire connecting device of the present invention in a use state.

FIG. 6 is a perspective view of a conventional electric wire connection device for the present invention in an electric wire connection state.

FIG. 7 is a perspective view showing another conventional wire connecting device for the present invention.

FIG. 8 is a cross-sectional side view of another conventional electric wire connecting device for the present invention in use.

[Explanation of symbols]

 31 Wire Connecting Device 32 Conductive Metal Fitting 35 Connection Spring Piece 38 Electric Wire 39 Cover 40 Core Wire 41 Blade 42 Sharp Angle Edge 43 Obtuse Edge 51 Wire Connecting Device 53 Conductive Metal Fitting 54 Connection Piece 56 Blade 57 Electric Wire 58 Cover 59 Core Wire

Claims (1)

[Claims] 1. A conductive metal fitting having a connecting piece for connecting the wires by contacting the core of the wires by penetrating through the sheath of the wire by inserting the wire and then pulling back slightly after inserting the wire An electric wire connecting device, characterized in that an obtuse angle edge is formed on the side of the tip of the connecting piece of the conductive fitting close to the electric wire, and the obtuse angle edge contacts the core wire of the electric wire.