JPH11262142A - Plug-in contactor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plug-in contactor rugged enough not lower the contact pressure, even after a long term use and assures no lowering of conductive performance while maintaining good electrical contact. SOLUTION: A plug-in contactor has a spring piece 20 between contact pieces 10 provided facing each other to energize the contact pieces 10 in the direction for isolating each other. Moreover, in the plug-in contactor, a curving portion 21 is preferably formed to the spring piece 20, and the contact pieces 10 are isolated through a spring force of the curving portion 21. In this structure, the interval between the contactors is adjusted appropriately, and thereby the plug-in contactor is given the spring property which does not lower the external energizing force, when it is pressure inserted into a connecting conductor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug-in contact for press-fitting into a predetermined space of a connecting conductor portion to form a branch path in a bus duct connecting device.

[0002]

2. Description of the Related Art Conventionally, as a plug-in contact used for a bus duct connecting device, there is a plug-in contact provided with a spring property at a tip portion of the contact. For example, Japanese Patent Publication No. 49-44387 discloses a plug-in contact in which a pair of flat conductors whose one end is bulged outward and curved is symmetrically overlapped to provide spring properties. The contact is press-fitted into a predetermined space between the connection conductors, and the bulging portion of the contact is electrically connected to the opposing inner surface of the connection conductor.

However, the conventional plug-in contact described above has a problem in that, when used for a long period of time, the outward spring property of the swelled and curved portion of the flat conductor is reduced, so that poor contact increases the electrical resistance and generates heat. There is.

[0004] Further, the bulging curved portion of the plug-in contact is deformed by press-fitting to the main conductor, and therefore has a drawback in strength. In addition, there is a problem that the current-carrying performance has to be reduced because the contact easily occurs.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, the present invention has a plug-in contact which has a strength such that the contact pressure does not decrease even after long-term use, maintains good electrical contact and does not lower the current-carrying performance. The purpose is to provide.

[0006]

A plug-in contact according to the present invention is characterized in that a spring piece is interposed between opposed contact pieces and a spring force is applied in a direction in which the contact pieces are separated from each other. .

In the plug-in contact, it is preferable that a curved portion is formed on the spring piece, and the contact piece is separated by the spring force of the curved portion.

[0008]

According to the above construction, the outward biasing force of the curved portion of the spring piece properly adjusts and maintains the interval between the contact portions.
The plug-in contact has a spring property that does not reduce the outward biasing force when press-fitted onto the connection conductor, and the electrical and mechanical connection between the outer surface of the contact portion and the connection conductor has been in good condition for a long time. Can be maintained.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on specific embodiments, but the present invention is not limited to such embodiments.

As shown in FIGS. 1 and 2, the plug-in contact 1 is made of a conductive material and includes a contact piece 10 comprising a contact portion 11 and a base 12, and a spring piece 2 having a curved portion 21 formed thereon.
And a curved portion 21 between a pair of left and right contact portions 11.
Is positioned, and the spring piece 20 is symmetrically arranged in the left-right direction.
0, and the contact piece 10 and the spring piece 20 are attached and integrated with the rivet 2 at the base 12 (first embodiment).

The contact piece 10 is a flat conductor, and a step portion 13 is formed at a substantially middle position thereof and divided by the step portion 13, one of which is a pair of left and right contact portions 11 and the other is a base portion 12. Then, the contact piece 10 is expanded from the base portion 12 at the step portion 13 and reaches the contact portion 11. The material of the contact piece 10 is appropriately made of copper, aluminum, or the like, and may be any conductive member.

The contact portion 11 is a contact portion with the connection conductor 30 when plugged into the connection conductor 30 for branch connection (see FIGS. 4 and 5). An inclined surface 15 is formed in the portion from the outer surface toward the tip portion so that it can be easily inserted into a space between the connection conductors 30 provided at predetermined intervals. A hole 16 for connecting a branch cable or the like is formed near the upper end of the base 12.

The spring piece 20 is provided with a slit 22 in the longitudinal direction near the lower end and a curved portion 21.
A hole 23 is formed in the upper end. When the curved portion 21 is sandwiched between the pair of contact pieces 10, the curved portion 21 is located in a predetermined space between the contact portions 11 expanded by the step portion 13, and outwardly springable near the lower ends of the left and right contact pieces 10. Has been granted. The material of the spring piece 20 may be any material as long as it can maintain the spring property for a long period of time, such as stainless steel or a steel plate made of spring. The spring piece 20 may be any as long as it can apply an outward spring force to the contact portion 11, and a leaf spring, a coil spring, or the like can be used.

FIG. 3 shows an embodiment (second embodiment) having a configuration similar to that of the plug-in contact 1. In the present embodiment, the spring piece 20 is located only in a predetermined space between the left and right contact portions 11 expanded by the step portion 13 of the contact piece 10, and the rivet 2 is attached to the contact piece 10 below the step portion 13.
It is integrated by being attached with. The curved portion 21 of the spring piece 20 imparts outward spring properties near the lower end of the contact piece 10.

A plug-in contact 1 having a pair of left and right spring pieces 20 disposed inside a pair of right and left contact pieces 10.
The third embodiment (third embodiment) is shown in FIG. Spring piece 20
A curved portion 21 is formed toward the outside at a lower portion of the pair, and an outer surface of each curved portion 21 urges an inner surface of the pair of contact portions 11 with an outward spring force. The plug-in contact 1 can take out the branch by press-fitting into the space between the two parallel flat conductors 30 for the electric trunk line shown by the chain line.

FIG. 5 shows another embodiment (fourth embodiment). The plug-in contact 1 is formed by integrally forming a contact piece 10 with a pair of left and right contact portions 11 and a base portion 12 having a substantially n-shaped cross section, and a base portion 24 and a pair of left and right curved portions 21 integrally formed therein. A piece 20 is provided, and the base 12 and the base 2
4 is a configuration in which both can be fixed with a common screw component. The curved portions 21 are formed below the spring pieces 10, and the outer surface of each curved portion 21 urges the spring force outward with respect to the inner surfaces of the pair of left and right contact pieces 10. The plug-in contact 1 can take out a branch by press-fitting into a space between two parallel flat conductors 30 for electric trunk lines shown by chain lines.

The number of the curved portions 21 of the spring piece 20 is not limited to one, but may be plural and may be formed continuously or discontinuously. Further, in the above-described embodiment, the slits 14 and 22 are formed at substantially the center in the longitudinal direction of the contact piece 10 and the spring piece 20 to improve the familiarity with the conductor to be connected.
Even if the slits 14 and 22 are not provided, there is no problem.

Next, the plug-in contact 1 is connected to the connection conductor 30.
The state inserted in will be described. FIG. 6 shows a state in which the plug-in contact 1 of the first embodiment is press-fitted and elastically attached to a space 48 between two flat connection conductors 30 for electric trunk lines arranged in parallel at a predetermined interval.

When the plug-in contact 1 is inserted between the connection conductors 30, it is easy to insert since the tip of the contact 1 is the inclined surface 15 facing inward. When the contact 1 is inserted, the outer surface of the contact piece 10 comes into contact with the opposite inner surface of the connection conductor 30. At this time, the left and right contact pieces 10 are urged outward by a curved portion of the spring piece 20 located inside, and the connection conductor 30 and the contact portion 11 are electrically connected by press-fitting the contact 1 by a predetermined dimension. It is elastically connected.

As a modified example, as shown in FIG. 7, an opening 31 for receiving the plug-in contact 1 is provided at a predetermined position of a connection conductor 30 of one flat plate for electric trunk line horizontally arranged as shown by a chain line. May be formed. In this case, the opening 3
By inserting the plug-in contact 1 into the connector 1 and press-fitting it, it is electrically elastically connected. In addition, the plug-in contact 1 of the illustrated example
Is of the second embodiment.

Next, a case where the plug-in contact 1 is actually used in a bus duct will be described. FIGS. 8 to 10 show a bus duct 40 of a butt connection system in which the plug-in contacts 1 according to the first embodiment are press-fitted and elastically attached to each phase.

The bus duct 40 is formed such that the ends of the in-phase conductors 41 to be connected face each other with a space therebetween, and the connecting conductors 30 are arranged along both sides thereof. Insulating separators 43 are interposed between the side plate connecting plates 42, respectively. Duct side plate joint plate 4
2. The insulating separator 43 is penetrated by a bolt 45 covered with an insulating sleeve 44. The connecting conductor 30, the insulating separator 43, and the duct side plate connecting plate 42
The nut 46 is tightened and pressed from the outside of the duct side plate connecting plate 42 through the nut 7 (FIG. 8).

Then, the plug-in contact 1 is inserted into the space 48 formed between the ends of the conductors 41 and between the opposing inner surfaces of the insulating sleeve 44 and the connection conductor 30 from the opening 50 of the cover member 49 and press-fitted. I do. FIG. 9 shows a case where the plug-in contact 1 is inserted into the upper or lower part of the bolt 45 with the insulating sleeve 44. In this use example, the plug-in contact 1 of the first embodiment is used as shown in FIG.

By the press-fitting, the pair of in-phase connecting conductors 3
0, the contact portion 1 of the plug-in contact 1
1 is electrically and elastically connected to the connection conductor 30. The connection between the plug-in contact 1 and the connection conductor 30 is kept electrically and mechanically good for a long period of time by the outward biasing force of the bending portion 21, and an excellent plug-in connection device can be obtained.

[0025]

Since the plug-in contact according to the present invention has the above-described structure, it has the strength that the contact pressure does not decrease even when used for a long time, and has the effect of maintaining good electrical contact and not reducing the current-carrying performance. . Therefore, mechanical safety,
A plug-in contact with good electrical safety and the like can be obtained.

[Brief description of the drawings]

FIG. 1A is a front view of a first embodiment of a plug-in contact. (B) Side view of the first embodiment of the plug-in contact.

FIG. 2 is an exploded perspective view of the first embodiment of the plug-in contact.

FIG. 3A is a front view of a second embodiment of a plug-in contact. (B) Side view of the second embodiment of the plug-in contact.

FIG. 4 is a partially enlarged view of a third embodiment of a plug-in contact.

FIG. 5 is a partially enlarged view of a fourth embodiment of a plug-in contact.

FIG. 6 is a perspective view of an example of an inserted state of a plug-in contact;

FIG. 7 is a perspective view of a modification of an inserted state of the plug-in contact.

FIG. 8 is a partially cut front view of a bus duct using a plug-in contact.

FIG. 9 is a longitudinal sectional view of the bus duct of FIG. 8;

FIG. 10 is a cross-sectional view of the bus duct of FIG. 8;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plug-in contact element 10 Contact piece 11 Contact part 20 Spring piece 21 Bending part 30 Connection conductor 40 Bus duct

Claims (2)

[Claims] 1. A spring piece is interposed between opposed contact pieces,
A plug-in contact, wherein a spring force is applied in a direction in which the contact pieces are separated from each other. 2. The plug-in contact according to claim 1, wherein a bent portion is formed on the spring piece, and the contact piece is separated by a spring force of the bent portion.