JPH04230971A - Socket - Google Patents

Abstract

PURPOSE: To provide a single-head type and a double-head type socket producing strong reaction against over-current. CONSTITUTION: A socket includes two-layered internal conductive strips 16a, 16b and external elastic strips 22a, 22b fixed on the both sides of conductor 14, conductive strips 16a, 16b and the elastic strip 22a, 22b are longitudinally separated and the current passing the conductor strips 16a, 16b are separated, in order to reduce an electrodynamic repulsive force produced by over-current caused by short circuit between the internal strips 16a, 16b and a conductor blade member 30 inserted in its interval. The double-head type inserting socket includes facing members projecting on both sides of the central conductor connecting two members.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a socket or double-headed socket which is attached to the end of a conductor rod for securing conductor blades of a busbar emerging from electrical equipment or insertable devices or equipment.

0002

BACKGROUND OF THE INVENTION Sockets for connecting two electrically conductive elements, one fixed electrically conductive element and one movable electrically conductive element, are known from the prior art. Typically, one of the electrically conductive elements is located within a control board, and the other element is connected to a device insertable with respect to the control board.

Essentially, a socket comprises at least one block or central body of a generally flat, rectangular, well-conducting material, with laminar elastic fingers, also conductive, on either side of the block, which are pressed together for connection. It has the appearance of a fork-like two-legged socket, for example, in which a strip-like conductor or blade is connected in a single-headed socket fixed to a busbar serving as a central body, or a double-headed socket containing a central body. Layered finger assemblies project in opposite directions from each side of the mold socket to connect connection blades of different devices to each other or to connect busbars of a control board and blades of a device.

It is well known that, due to overcurrent, a repulsive force is generated which displaces the conductor due to the current flowing between the conductor inserted into the socket and the resilient fingers or jaws of the socket.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a socket that can resist overcurrents as much as possible. i.e., without creating an opening of the circuit between the conductor blade inserted into the socket and its contact area, preventing overheating areas and arcing, as well as welding, between the socket and the conductor blade inserted into it. It is an object of the present invention to provide a socket that can reduce the contact resistance of the current flowing through the socket, does not exhibit an excessive force against insertion of a blade, and can be manufactured reliably and easily in an automated process.

[0006]

[Means for Solving the Problems] To achieve this object, it is established that the said repulsive force is proportional to the square of the current that produces it, and that the current flowing between mutually parallel conductors is Even if the finger is close to the conductor, it does not substantially affect the repulsive force, so if the current flowing between the conductor and the finger can be halved by dividing the finger into two legs, the repulsive force will be approximately The fact is exploited that the capacity of the socket against overcurrents can be increased, since on the other hand the snapping force by the fingers is only halved. Of course, this principle is extended if the finger is divided into two or more parallel legs (e.g. three), in which case the repulsive force is further reduced and the resistance of the elastic force to the repelling force is further reduced. It is clear that it represents increasing benefits.

Another fact taken advantage of by the present invention is that materials exhibiting high electrical conductivity generally do not have sufficient mechanical strength to exhibit a reaction force opposing said repulsive force. Since strong materials generally have low electrical conductivity, it is necessary to separate the electrically conductive member from the member that provides the repulsive force.

This involves simply placing an outer strip of mechanically strong material around an inner strip of conductive material such that this inner strip is subjected to an inwardly pushing force, and the inserted conductor dividing said inner conductor strip in its longitudinal direction into a plurality of substantially equal parallel legs in a structure adapted to ensure contact with the blade and a reaction force counteracting said electrical repulsion force; This is achieved by the socket of the present invention, which is characterized by:

The outer elastic strip, which abuts the inner strip, is similarly divided. Furthermore, the outer elastic strip is a flat strip obtained from the web and does not require any subsequent heat treatment, so its manufacture is extremely simple and its operation is reliable.

More specifically, there are two legs separating the outer strip and the inner strip. or,
There may be three legs, or more than three legs.

Furthermore, the outer strip can be applied directly to the inner strip. Alternatively, the outer strip can be provided on the inner strip with an intervening insulating layer insulating the inner conductor strip from the outer strip.

According to another embodiment of the invention, only the inner conductive strip is divided into a plurality of parallel legs, the outer strip being of monolithic construction and capable of abutting the inner strip via an insulating layer. .

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, referring to FIGS. 1 to 4, a socket 10 having a simple structure has two side flanges 12a and 12b sandwiching a flat rectangular parallelepiped center body 14 made of a good metal conductor. This central body is, in this example, an extension of a busbar commonly used in power plants and in power distribution boards and control panels. The side flanges 12a, 12b have inner conductive strips 16a, 16b, for example made of copper, which are provided with enlarged insertion contact areas 18a, 18b at their ends so that they can be inserted into the socket 10. It facilitates insertion of the conductor and ensures good electrical contact with this external conductor. The side flanges 12a, 12b also include two intermediate strips 20a, 20b made of insulating material and two elastic outer strips 22a, 22b for applying a pressing force to the inner conductor strips 16a, 16b.

According to the invention, the inner conductor strip 16
a, 16b are parallel legs 16a1, 16a2 and 16a3
(only the tip of which is shown in FIGS. 1 and 3) and 16b1, 16b2, and 16b3 (not shown), and the current is distributed approximately evenly between these legs.
Each of these legs also terminates in an insertion contact area 18a1, 18a2, 18a3 and an opposing insertion contact area 18b1, 18b2, 18, respectively.
b3 (not shown). This division of the strips has a purpose which will be explained later.

Also strips 20a, 20b and 22
a, 22b are also divided in the same way, and the legs 2 shown in FIGS. 1 and 3 are separated.
2a1, 22a2, 22a3 are the legs 16al, 16a2,
An elastic pressing force is applied to each of 16a3.

Finally, both flanges 12a and 12b are firmly fixed to the center body 14 by two rivets 24 and 26.

As shown in FIGS. 3 and 4, the conductor blade 30 is inserted between the flanges 12a and 12b of the socket 10, and the strip assemblies 16a, 20a, 22a are pushed to one side and the strip assemblies 16b, 20b , 22b to the other side so as to contact the end sections 18a, 18b and the legs 22a1, 22a2, 2 of the elastic strips 22a, 22b.
2a3 and 22b1, 22b2, 22b3 press the conductor strips 16a, 16b against the conductor blade 30.

Referring to FIGS. 5-8, a double-headed insertion socket 40 according to the present invention includes two pairs of side flanges 42.
a, 42b and 44a, 44b, the flanges of which are secured around the central socket body 46, each flange having two pairs of inner strips 48a, 48b of highly conductive material, such as copper. and 50a, 50b and insertion contact areas 52a, 52b and 54 extending therefrom.
a, 54b, respectively, and these inner strips include insulating intermediate strips 56a, 56b and 5, respectively.
8a, 58b, these intermediate strips connect the inner conductor strips to the outer elastic strips 60a, 58b.
60b and 62a, 62b, and the outer strip provides a pressing force against the inner conductor strip. According to the invention, the inner conductor strips 48a, 48b and 50a, 50b each have three legs 48al, 48
a2, 48a3 and 50al, 50a2, 50a3 (
Only the tip is shown in FIGS. 5 and 7, respectively),
48b1, 48b2, 48b3 and 50b1, 50b
2,50b3 (not shown), each receiving approximately the same amount of current for the purposes described below. Of course, the insertion contact areas 52a, 52b and 54a, 54b also include the subareas 52a1, 52a2, 52a3 and 54a1, 54a2, 54a3 (shown in FIGS. 5 and 7) and the subareas 52b1, 52b2, 52b3 and 54b1, respectively.
It is divided into 54b2 and 54b3 (not shown). Similarly outer elastic strips 60a, 60b and 62a
, 62b are legs 60a1, 60a2, 60a3 and 62al, 62a2, 62a3 (shown in FIGS. 5 and 7) and legs 60b1, 60b2, 60b3 and 62b1, respectively.
62b2, 62b3 (not shown), respectively inner conductive strips 60a, 60b and 62a.
, 62b.

Finally, the flanges 42a, 42b and 4
4a and 44b are fixed to the socket body 46 by the tightening action of rivets 64 and 66.

Flanges 60a, 60b and 62a, respectively
, 62b are shown in FIG. 7 and FIG. In this case, these conductor blades enter between the flanges mentioned above and contact the insertion contact area 5.
2a, 52b and 54a, 54b make strong contact with these flanges.

As can be deduced from FIGS. 1 to 4 and also from FIGS. 5 to 8, the operation of the socket according to the invention is as follows.

Insertion of the conductor blade 30 into the socket 10 forces the conductor strips 16a and 16b laterally against the outer elastic strips 22a and 22b. As a result, the contact extension areas 18a and 18b press against the conductor blade 30 such that the contact between the conductor blade 30 and the socket 10 is strengthened.

Since the contact between the conductor blade 30 and the socket 10 occurs approximately near the insertion contact expansion areas 18a, 18b, when an overcurrent occurs, the repulsive force between the conductor blade and the contact area is reduced at the point where the current passes. develop.

As shown in FIGS. 1-4, flanges 12a and 12b are each divided into three longitudinal parallel legs, and more particularly, inner conductor strips 16a and 1
6b are parallel legs 16a1, 16a2, 16a3, respectively.
and 16b1, 16b2, and 16b3 (not shown), and an insertion contact extension part 18a1,
18a2, 18a3 and 18b1, 18b2, 18b
3 (of which only 18a1, 18a2, 18a3 are shown) extends, and the inner strip 16
Each leg of a corresponds to the corresponding outer leg 22a1 of the outer leg 22a,
22a2, 22a3, and similarly inner strip 1
Each leg of 6b corresponds to a corresponding outer leg 22b1 of outer leg 22b.
, 22b2, and 22b3.

Parallel legs 16a1, 16a2, 16a3 and 16b1,1 of inner conductor strips 16a and 16b
6b2, 16b3 insert contact extensions 18a1, 18a2, 18a3 and 1 between the conductor blade and the socket.
It is clear that the flowing current is divided in 8b1, 18b2, and 18b3 while creating a repulsive force, and the magnitude of the repulsive force is approximately 1/1 of the repulsive force that would occur if the inner conductor strip was not divided longitudinally. 9 (1/3 of 2
). Corresponding outer legs 2 of outer legs 22a, 22b
2a1, 22a2, 22a3 and 22b1, 22b2
, 22b3 is reduced by exactly 1/3, resulting in a desirable ratio between the repulsion force and the reaction force of the legs of the outer strip.

[0027] The present invention is not limited to the above explanation, but can be modified and implemented as desired within the scope of the spirit thereof. For example, instead of dividing the outer elastic strips 22a and 22b into three legs each as described above, the outer elastic strips 22a and 22b can be made into one piece with the use of insulating layers 20a and 20b to provide a higher reaction force to the repulsive force caused by overcurrent. You can also give.

[Brief explanation of the drawing]

1 is a front view of a first embodiment of a simple type socket suitable for fastening to the end of a busbar according to the invention; FIG.

FIG. 2 is a side view of the same embodiment as FIG. 1;

FIG. 3 is a diagram similar to FIG. 1, showing a state in which the conductor blade is inserted into the socket;

4 is a side view of the socket of FIG. 3 housing a conductor blade; FIG.

Figure 5: Suitable for the connection of two busbars or conductor blades, fixed to the control cabinet frame to act as a connector between the conductor elements of an insertable device, or conductors between busbars or of a control cabinet; FIG. 6 is a front view of a second embodiment of a double-headed insertion socket of the invention that is movably made to operate as a connector between blades or as a connector to a fixation device;

FIG. 6 is a side view of the embodiment of FIG. 5;

7 is a front view of a socket similar to FIG. 5 with two conductor blades inserted; FIG.

FIG. 8 is a side view of the socket of FIG. 7;

[Explanation of symbols]

14 Center body 16a, 16b Inner conductor strip 20a, 20b
Insulating layers 22a, 22b Outer elastic strip 30 Conductor blade

Claims (8)

[Claims] Claim 1. An inner strip (16a) of good conductive material.
, 16b) by an outer strip (22a, 22b) of material having mechanical properties, said inner strip (16a, 16b) surrounding the outer strip (22a, 22b).
b) so as to receive an inward pressing force to ensure contact with the conductor blades (30) inserted between these strips and a reaction force opposing the repulsive force; In the socket, the inner conductor strip (1
6a, 16b) are longitudinally divided into a plurality of substantially equal parallel legs. 2. Socket according to claim 1, characterized in that the outer elastic strips (22a, 22b) which abut the inner strips (16a, 16b) are likewise divided. 3. The inner strips (16a, 16b
) and the outer strip (22a, 22b) are two in number. 4. The inner strips (16a, 16b
) and the outer strip (22a, 22b) are three in number. 5. The socket according to claim 1, wherein the number of legs dividing the inner strip (16a, 16b) and the outer strip (22a, 22b) is three or more. . 6. The outer strips (22a, 22b
6. Socket according to any one of claims 1 to 5, characterized in that the inner strip (16a, 16b) rests directly on the inner strip (16a, 16b). 7. The outer strips (22a, 22b
) abuts said inner strip (16a, 16b) via an insulating layer (20a, 20b), said insulating layer insulating said inner conductor strip (16a, 16b) from said elastic strip (22a, 22b). A socket according to any one of claims 1 to 5. [Claim 8] Inner conductor strips (16a, 16b
) is divided into multiple parallel legs, and the outer strip (2
2a, 22b) are integrated, and the insulating layers (20a, 20
2. Socket according to claim 1, characterized in that it abuts the inner strip (16a, 16b) via b).