JPH10199589A - Terminal device, and connection body structure between terminal and covered electric wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically cut the covering member of a covered electric wire at a knife edge part to electrically connect an exposed core wire and the inner end edge of a slit, by fastening first and second terminals in a condition where the cover wire is arranged between the slit opening portion of a projected part and a second terminal fastening part. SOLUTION: The covering member 12a of a covered electric wire 12 is automatically cut at a knife edge part 7 to electrically connect an exposed core wire 12b and the inner end edge of a slit 6, by fastening first and second terminals 3 and 8 by threadedly engaging operation of a screw 11 in a condition where the covered electric wire 12 is arranged between the opening portion 6a of a protruded part 5 and a second fastening part 9. This can carry out the connecting work between the terminal and the covered electric wire 12, by the simple operation of only the threadedly engaging operation of the screw 11. The width of the slit 6 of the protruded part 5 is set narrower than the diameter of the core wire 12b of the cover dielectric wire 12, to forcedly house the core wire 12b into the slit 6 at the time of fastening the terminals 3 and 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal device and a connection structure between a terminal and a coated electric wire, and more particularly to a terminal device and a terminal which can be connected to a terminal without performing special preparation processing on a connection portion of the coated electric wire. The present invention relates to an improvement in a connection structure between a cable and a covered electric wire.

[0002]

2. Description of the Related Art In general, various methods are used to connect terminals and coated electric wires in internal circuits of electric equipment as well as switching power supplies and switchboards. For example, there are methods of soldering, winding a core wire of a covered electric wire around a screw and fixing the screw, soldering a core wire to a lug terminal and screwing the lug terminal, and using a terminal device. A method using a terminal device has been widely adopted in terms of reliability.

A conventional terminal device of this kind is configured as shown in FIG. 7, for example. In the figure, reference numeral A denotes a terminal device, and a terminal block B made of an insulating member having partitions Ba, Ba at regular intervals in a base portion, and a partition B of the terminal block B.
a, Ba and a screw hole Ca at the center.
A terminal plate C made of a conductive member having
a holding plate D made of a conductive member having a, and a screw E for tightening the terminal plate C and the holding plate D.

The connection of the coated electric wire using the terminal device A is performed, for example, as shown in FIGS. First, as shown in FIG. 8A, a cut is made by a knife or the like at one end portion of a covered electric wire F obtained by insulatingly covering a core wire Fb with a covering member Fa. Next, as shown in FIG. 3B, the covering member Fa at the end is removed to expose the core wire Fb. Next, as shown in FIG. 7, the crimp terminal G is connected to the exposed core wire Fb. That is, one side has a substantially Y-shaped connection portion G
a, the exposed core wire Fb is inserted into the crimping portion Gb of the crimp terminal G having the sleeve-shaped crimping portion Gb on the other side, and caulked with a crimping tool. Next, the screw E is slightly screwed into the screw hole Ca of the terminal plate C via the hole Da of the holding plate D, and the connection portion Ga of the crimp terminal G connected to the insulated wire F is connected to the terminal plate C and the holding plate. D is inserted so that the screw E is located in the slit portion of the connection portion Ga. In this state, by further screwing the screw E, the connection portion Ga of the crimp terminal G is
Is tightened by the terminal plate C and the holding plate D, and the terminal and the covered electric wire are electrically connected.

[0005]

By the way, according to the connection structure of the insulated wire F using the terminal device A described above, the screw E
Can easily and reliably electrically connect the crimp terminal G by tightening the terminal plate C and the holding plate D by the simple screwing operation, and can reduce the apparatus cost because the structure is simple. It has features.

However, when the terminal device A is used, the crimp terminal G must be connected to the end of the insulated wire F, so that there is a problem that the preparation for connection becomes complicated. That is, in order to connect the crimp terminal G to the end of the insulated wire F, the covering member Fa at the end of the insulated wire F is cut and removed with a knife, a nipper, or the like, and the crimped portion G
The core wire Fb must be exposed to fit the length of b. In particular, since the length of the crimp portion Gb differs depending on the type of the crimp terminal G, it is necessary to adapt the length of the core wire to be exposed to the crimp terminal to be used. For this reason, there is a problem that the work of cutting and removing the covering member Fa becomes complicated.

The exposed portion of the core wire Fb inserted into the crimping portion Gb of the crimping terminal G is crimped and fixed to the crimping portion Gb by crimping operation using a crimping tool, but the thickness of the core wire Fb is applied to the circuit. Therefore, the size of the crimping tool must be changed according to the thickness of the core wire Fb. If an incompatible crimping tool is used, the reliability of the electrical connection between the core wire Fb and the crimping portion Gb will be significantly reduced. Therefore, conventionally, since the crimping tool is used according to the size of the insulated wire F, not only must a large number of crimping tools having different sizes be prepared, but also a large number of crimping tools can be used. , There is also a problem that the crimping operation becomes complicated.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a terminal device capable of connecting to a terminal by a relatively simple structure without peeling and removing a covering member of the covered electric wire, and a connection structure for connecting the terminal to the covered electric wire. Is to provide.

[0009]

SUMMARY OF THE INVENTION Accordingly, in order to achieve the above-mentioned object, the present invention forms a substantially U-shaped slit in a protrusion extending substantially perpendicularly to a tightening portion,
A first terminal having a knife edge portion formed at least in an opening portion of the slit; a second terminal having a slit hole into which a projection portion can be inserted at a portion corresponding to the projection portion of the first terminal; And a tightening means for tightening the second terminal and the second terminal.

According to a second aspect of the present invention, a substantially U-shaped slit is formed in a protruding portion extending in a direction substantially perpendicular to the tightening portion, and a knife edge portion is formed in at least an opening of the slit. And a second terminal having a slit formed in a portion corresponding to the protrusion of the first terminal, into which the protrusion can be inserted, and a tightening means for tightening the first terminal and the second terminal. And a covered electric wire, wherein the first terminal and the second terminal are tightened by a tightening means, and the first terminal and the second terminal are inserted into the slit hole. The sheathing member of the covered electric wire arranged between the terminal and the first terminal is cut at the knife edge portion of the protrusion, the core of the covered electric wire is accommodated in the slit, and the core of the covered electric wire and the first terminal are electrically connected. Characterized in that it is connected to

Further, according to a third aspect of the present invention, a projection is formed at an end of a first tightening portion having a hole at a central portion so as to extend in a direction substantially perpendicular to the first tightening portion.
A first U-shaped slit formed at the protruding portion, and a knife edge portion formed at least at an opening of the slit;
A second terminal having a screw hole and a slit hole into which a protrusion can be inserted in a second tightening portion corresponding to the hole and the protrusion of the first terminal; a first terminal and a second terminal. A screw for tightening the terminal and a covered electric wire, wherein the screw is a first
In connection with the insertion of the protrusion into the slit hole by screwing into the screw hole of the second terminal from the hole of the terminal and tightening it, the first
Cutting the covering member of the covered electric wire disposed between the projecting portion of the terminal and the second tightening portion of the second terminal at the knife edge portion of the projecting portion, and accommodating the core wire of the covered electric wire in the slit, A fourth aspect of the present invention is characterized in that the core wire of the coated electric wire and the first terminal are electrically connected, and the fourth invention is characterized in that the first terminal is formed of a conductive member. The invention is characterized in that the first and second terminals are constituted by conductive members, and the sixth invention is characterized in that the covered electric wire is an aggregate of a plurality of strands. .

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a terminal device according to the present invention will be described with reference to FIGS. In the figure,
Reference numeral 1 denotes a terminal device, which includes, for example, a terminal block 2, a first terminal 3, a second terminal 8, and a tightening means 11. The terminal block 2 is formed of an insulating member such as a resin, and is formed by integrally molding a plurality of partition walls 2a at regular intervals in a base portion. The first terminal 3 is formed of a plate member made of a conductive member, and is, for example, a flat first tightening portion 4 having a hole 4a in a central portion, and the first tightening portion 4 on the same side as an end of the first tightening portion 4. And a plurality of protrusions 5 extending in a substantially right angle direction. This projection 5 has almost U
A slit 6 having a U-shape is formed, and a knife edge portion 7 is formed at an inner edge portion thereof. In particular, it is desirable to set the width of the slit 6 so as to be smaller than the diameter of a core wire of a covered electric wire described later. In addition, slit 6
The opening 6a is expanded in a C-shape.

The above-mentioned second terminal 8 is fixed to a base portion between the partition walls 2a, 2a on the terminal block 2. The second terminal 8 is formed in a substantially U-shape from a plate made of a conductive member, and a second tightening portion 9 at the top thereof corresponds to the hole 4a and the protrusion 5 of the first terminal 3. A screw hole 9a and a slit hole 10 into which the protruding portion 5 can be inserted are formed at the portion where the screw hole 9a is formed. A screw 11 as a fastening means is inserted and screwed into the hole 4a of the first terminal 3 and the screw hole 9a of the second terminal 8. The covered electric wire 12 is electrically connected to the first terminal 3 by the screwing operation of the screw 11. The covered electric wire 12 includes a covering member 12a and a core wire 12b formed of an aggregate of a plurality of strands.

A method of connecting the insulated wire 12 and the terminal device 1 will be described with reference to FIG. First, FIG.
As shown in FIG. 5, the coated electric wire 12 is placed on the second tightening portion 9 of the second terminal 8 and the first terminal 3 is connected to the second terminal 8.
Is arranged such that the opening 6 a of the protruding portion 5 is in contact with the covered electric wire 12. Then, the screw 11 is inserted into the hole 4a and screwed into the screw hole 9a. Next, as shown in FIG. 3B, when the screw 11 is further screwed, the first terminal 3 is pushed downward and moves, whereby the protrusion 5 also moves downward. The movement of the protrusion 5 guides the covered electric wire 12 into the slit 6 while being guided by the opening 6a. At this time, the covering member 12 a of the covered electric wire 12 is forcibly cut by the knife edge portion 7 of the slit 6 and comes into contact with the inner edge of the slit 6. Further, when the screw 11 is screwed into the screw hole of the second terminal 8, as shown in FIGS.
Is forcibly accommodated in the slit 6. The core wire 12b is sandwiched between the slit top 6b and the second tightening portion 9 to complete the connection. In this state, the core wire 12b of the covered electric wire 12 is electrically connected between the inner edge of the slit 6 and the top 6b.

According to this embodiment, the first terminal 3 and the second terminal 8 are in a state in which the covered electric wire 12 is arranged between the opening 6a of the projection 5 and the second tightening portion 9. Screw 11
Of the insulated wire 12
Is automatically cut by the knife edge portion 7, and the exposed core wire 12b and the inner edge of the slit 6 are electrically connected. For this reason, the connection operation between the terminal and the insulated wire can be performed by a simple operation of only screwing in the screw 11, and complicated preparation processing for the insulated wire as in the related art is not required, and the work efficiency can be significantly improved. .

Further, since the width of the slit 6 of the protruding portion 5 is set to be smaller than the diameter of the core wire 12b of the covered electric wire 12, when the first terminal 3 and the second terminal 8 are tightened, The core wire 12b is forcibly accommodated in the slit 6. For this reason, even if the thickness of the insulated wire 12 varies based on the current capacity of the application place and the diameter of the core wire 12b fluctuates, when the core wire 12b is housed in the slit 6, the inner edge of the slit 6 must be electrically connected to the inner edge. Connected. Therefore, the insulated wire 12 and the first terminal 3 can be reliably connected without being affected by the thickness of the insulated wire 12. In addition, depending on the width of the slit 6, when the core wire 12b is accommodated, the inner edge of the slit bites into the core wire 12b, so that the connectivity between the covered electric wire 12 and the first terminal 3 can be further enhanced.

In particular, even if the width of the slit 6 of the projecting portion 5 is set to be equal to or larger than the diameter of the core wire 12b of the insulated wire 12, the core wire 12b of the insulated wire 12 in the tightened state.
Is clamped and tightened by the top portion 6b of the slit 6 and the second tightening portion 9, a highly reliable electrical connection state can be obtained.

Moreover, the connection of the insulated wire 12 by tightening the first terminal 3 and the second terminal 8 is performed by one insulated wire 12.
Is performed in two places, not only electrical connection is ensured, but also mechanical connection strength is improved, and disconnection occurs even when tension acts on the insulated wire 12. There is no.

FIG. 6 shows another embodiment of the first terminal according to the present invention. Basically, it is the same as the above embodiment, except that the knife edge portion 7 at the inner edge of the slit 6 is formed only in the opening 6a of the slit 6.

According to this embodiment, the same effect as in the above-described embodiment can be obtained, and since the knife edge portion 7 is formed only in the opening 6a of the slit 6, the core wire 12b is When it is accommodated in the slit 6, a cut is not formed by the pressing force from the inner edge of the slit 6, and a predetermined current capacity can be secured. In particular, even if strongly pinched and tightened by the top portion 6b of the slit 6 and the second tightening portion 9, it is possible to reliably connect electrically and mechanically without damaging the core wire 12b.

It should be noted that the present invention is not limited to the above-described embodiment at all, and for example, one to three or more projecting portions of the first terminal are formed for one covered electric wire. It is also possible that the knife edge portion has a cutting function for the covering member of the covered electric wire, and its tip portion does not need to be particularly sharp. Further, in addition to screws, caulking tacks or the like can be used as the tightening means, and the number of the tightening means can be increased to a plurality. Furthermore, the terminal block can be omitted depending on the application part.

[0022]

As described above, according to the present invention, the first terminal and the second terminal are disposed between the slit opening of the projecting portion and the tightening portion of the second terminal. In this state, the covering member of the covered electric wire is automatically cut by the knife edge portion, and the exposed core wire and the inner end edge of the slit are electrically connected. For this reason, the connection work between the terminal and the insulated wire can be performed by simple tightening by the tightening means, so that complicated preparation processing for the insulated wire as in the related art is not required, and the work efficiency can be significantly improved.

In the tightened state, the core wire of the covered electric wire accommodated in the slit is strongly held between the top of the slit and the second terminal. Electrical and mechanical connection with the device.

In particular, if the width of the slit of the projecting portion is set to be smaller than the diameter of the core wire of the covered electric wire, a strong pressing force acts on the core wire from the inner edge of the slit when the core wire is housed in the slit. Therefore, the electrical and mechanical connectivity between the coated electric wire and the first terminal can be further improved.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing an embodiment of a connection structure between a terminal and a covered electric wire according to the present invention.

FIG. 2 is a side sectional view of FIG.

FIG. 3 is an exploded perspective view of FIG. 1;

FIGS. 4A and 4B are enlarged views of the first terminal shown in FIG. 1, wherein FIG. 4A is a front view of a protruding portion, and FIG.
-X sectional drawing.

5A and 5B are diagrams for explaining a method of connecting a terminal to a covered electric wire, wherein FIG. 5A is a front sectional view showing a state before tightening, and FIG. FIG. 4 is a front sectional view showing a state where a part is cut by a knife edge portion.

6A and 6B show another embodiment of the first terminal according to the present invention, wherein FIG. 6A is a front view, and FIG. 6B is a bottom view of FIG.

FIG. 7 is an exploded perspective view of a conventional terminal device.

8A and 8B are views for explaining a conventional method of connecting a terminal to a covered electric wire, wherein FIG. 8A is a side view showing a state where a cut is formed at an end of the covered electric wire, and FIG. Fig. 4 is a side view of a state where an insulating coating on an end is removed to expose a core wire.

[Description of Signs] 1 Terminal device 2 Terminal block 3, 3A First terminal 4 First tightening portion 4a Hole 5 Projection 6 Slit 6a Opening 6b Slit top 7 Knife edge 8 Second terminal 9 Second Tightening part 9a Screw hole 10 Slit hole 11 Tightening means (screw) 12 Insulated wire 12a Insulated member 12b Core wire

Claims (6)

[Claims] A first terminal having a substantially U-shaped slit formed in a protruding portion extending in a direction substantially perpendicular to the tightening portion, and a knife edge formed in at least an opening of the slit; A second terminal having a slit formed in a portion corresponding to the protrusion, into which the protrusion can be inserted;
A terminal device, comprising a tightening means for tightening the terminal and the second terminal. 2. A first terminal having a substantially U-shaped slit formed in a protruding portion extending in a direction substantially perpendicular to the tightening portion, and a knife edge formed in at least an opening of the slit; A second terminal having a slit corresponding to the protrusion and having a slit hole into which the protrusion can be inserted;
A fastening means for tightening the first terminal and the second terminal, and a covered electric wire, wherein the first terminal and the second terminal are tightened by the fastening means for insertion of the protrusion into the slit hole. Relatedly, the covering member of the covered electric wire arranged between the projecting portion of the first terminal and the second terminal is cut at the knife edge portion of the projecting portion, and the core wire of the covered electric wire is accommodated in the slit, A connection structure between a terminal and a covered electric wire, wherein the core wire of the covered electric wire and the first terminal are electrically connected. 3. A projecting portion is formed at an end of the first tightening portion having a hole at a central portion so as to extend in a direction substantially perpendicular to the first tightening portion, and a substantially U-shaped slit is formed in the projecting portion. And a screw hole and a protrusion can be inserted into a first terminal having a knife edge portion formed at least in an opening portion of the slit, and a second tightening portion corresponding to the hole and the protrusion of the first terminal. A second terminal having a slit hole,
A screw for tightening the terminal and the second terminal, and a covered electric wire, wherein the screw is screwed into the screw hole of the second terminal from the hole of the first terminal and tightened, thereby forming a slit at the protruding portion. In connection with the insertion into the hole, the covering member of the covered electric wire arranged between the protrusion of the first terminal and the second tightening portion of the second terminal is cut at the knife edge of the protrusion, and A connection structure between a terminal and a coated electric wire, wherein the core of the coated electric wire is accommodated in the slit, and the core of the coated electric wire is electrically connected to the first terminal. 4. The connection structure between a terminal and a covered electric wire according to claim 1, wherein the first terminal is formed of a conductive member. 5. The connection structure according to claim 1, wherein the first and second terminals are made of a conductive member. 6. The connection structure between a terminal and a covered wire according to claim 2, wherein the covered wire is an aggregate of a plurality of strands.