JPH0641350Y2 - Contact for hot-swap - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot-swap contact, and more particularly to a structure of a hot-swap contact that prevents melting damage to the contact due to generation of an arc.

[0002]

2. Description of the Related Art A contact as shown in FIG. 2 is known as a hot-line insertion / extraction contact for preventing an arc from occurring between the contacts during insertion / extraction of a male pin because the contact is damaged. The contacts are arranged parallel to each other so as to receive the male pin 11 and sandwich the male pin 11,
First and second elastic contact pieces 14 connected to each other at an end 13 opposite to the receiving end 12 of the male pin 11.
And 15. First elastic contact piece 1
The male pin 4 is provided with a first protrusion (contact part) 16 at a position where the male pin 11 first comes into contact with the male pin 11 when it is inserted. Further, when the male pin 11 is inserted into the second elastic contact piece 15, a position inside the male pin 16 in the insertion direction of the male pin is arranged so that the second elastic contact piece 15 comes into contact with the second elastic contact piece 15 after the contact with the first elastic contact piece 14. The second protrusion (contact portion) 17 is provided on the.

Next, the operation of such a conventional hot-swap contact will be described. First, when the male pin is pulled out, the second protrusion 17 and the male pin 11 are separated as shown in FIG. At this time, since the first protrusion 16 and the male pin 11 are still in contact with each other and the second protrusion 17 and the male pin 11 are kept at the same potential, no arc is generated between them. As the extraction process progresses further, Fig. 2
As shown in (b), the first protrusion 16 and the male pin 11
And are separated. At this time, the first protrusion 16 and the male pin 1
An arc is generated between the tip portions 18 of the No. 1 unit. Therefore, although the first protrusion 16 and the tip portion 18 of the male pin 11 are damaged by the arc, the second protrusion 17 and the first and second protrusions 16, 17 of the male pin 11 in the inserted state.
The part in contact with is not damaged by the arc.

Next, when inserting the male pin, as shown in FIG.
As shown in (a), the first protrusion 16 and the male pin 11
It makes contact while generating an arc. As the insertion process progresses further, as shown in FIG. 2B, the second protrusion 17 and the male pin 11 come into contact with each other. At this time, since both are kept at the same potential, the arc is generated between them. Does not happen. As described above, in the conventional hot-swap contact, the first protrusion 16 generates an arc, and the second protrusion 17 that prevents the occurrence of the arc makes stable contact with the male pin 11. .

[0005]

In such a conventional hot-line insertion / extraction contact, an arc is generated only by the first protrusion 16, but the contact metal is locally generated due to the high temperature generated by repeated arc generation. The first projection 16 was significantly damaged. As a result of the progress of such damage, the first protrusion 16 cannot function as an arc contact, and thus the hot-swap contact cannot function as a staggered contact. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a hot-swap contact that eliminates the above-mentioned conventional defects and can maintain the staggered contact function for a long period of time.

[0006]

According to the present invention, there is provided a first member which is arranged in parallel and spaced from each other so as to receive the male pin and to sandwich the male pin, and which is coupled to each other at an end portion opposite to the receiving end of the male pin. And a second elastic contact piece,
The first elastic contact piece is provided at a position where the male pin first comes into contact with the male pin when the male pin is inserted.
So that when the male pin and the male pin are inserted on the second elastic contact piece, the male pin comes into contact with the male pin after the male pin contacts the first elastic contact segment. A second protrusion provided at an internal position, and the electric resistance of the first elastic contact piece is set to 2
There is provided a hot-swap contact, which has a higher electrical resistivity than that of the elastic contact piece.

According to the present invention, the first elastic contact piece is made of a stainless steel plate, and the second elastic contact piece is made of a phosphor bronze plate.

Further, according to the present invention, the first and second elastic contact pieces are connected to each other by caulking at the end portion opposite to the receiving end of the male pin.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a perspective view showing the structure of a hot-swap contact according to the present invention. The contacts are spaced apart parallel to each other to receive and clamp the male pin (not shown), and first and second resilient contacts coupled to each other at an end 3 opposite the receiving end 2 of the male pin. Piece 4
And 5. The first and second elastic contact pieces 4 and 5 are coupled to each other by caulking so that the first elastic contact piece 4 is sandwiched by the two claws provided on the second elastic contact piece 5 at the end portion 3. Has been realized.

A first protrusion (contact point) 6 is provided on the first elastic contact piece 4 at a position where the male pin first comes into contact with the male pin when the male pin is inserted. Further, when the male pin is inserted on the second elastic contact piece 5, a position inside the male pin 6 in the insertion direction of the male pin so that the male pin contacts the second elastic contact piece 5 later than when the male pin contacts the first elastic contact piece 4. The second protrusion (contact portion) 7 is provided on the.

Next, the electrical resistivity of the first elastic contact piece 4 is selected to be higher than the electrical resistivity of the second elastic contact piece 5. For example, the first elastic contact piece 4 is made of a stainless steel plate, and the second elastic contact piece 5 is made of a phosphor bronze plate.

Since the function of the hot-swap contact of the present invention as a staggered contact is basically the same as that of the conventional hot-swap contact, repetition is avoided and operation different from that of the conventional contact is avoided. And the operation will be described. First, when the male pin is pulled out, an arc is generated between the first protrusion 6 and the tip 8 of the male pin 1, but the electrical resistivity of the first elastic contact piece 4 is smaller than that of the second elastic contact piece 5. Since the electric resistance is selected to be higher than the electrical resistivity, the arc current flowing between the first protrusion 6 and the tip 8 of the male pin 1 is limited, and the damage to the contacts due to the arc current can be suppressed low. However, on the other hand, in the hot-swap contact according to the present invention, when the second protrusion 7 and the male pin 1 are separated from each other, the electrical resistivity of the first elastic contact piece 4 and the second elastic contact piece 4 are separated from each other. A potential difference corresponding to the difference with the electrical resistivity of the elastic contact piece 5 is generated, and an arc based on this is generated.
A similar phenomenon occurs when the male pin 1 is inserted, but a detailed description thereof will be omitted.

As described above, in the hot-swap contact according to the present invention, the first and second protrusions 6 and 2 are formed by making the electric resistances of the first and second elastic contact pieces 4 and 5 different from each other. By appropriately sharing the damage due to the arc current among the seven, it is possible to provide a hot-swap contact capable of maintaining the staggered contact function for a long period of time.

[0014]

According to the present invention described above, the damage caused by the arc current between the first protrusion and the second protrusion is caused by making the electric resistivities of the first and second elastic contact pieces different from each other. By appropriately sharing the above, it is possible to provide a hot-swap contact that can maintain the staggered contact function for a long period of time.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a hot-swap contact according to the present invention.

FIG. 2 is a schematic diagram showing a configuration of a conventional hot-swap contact.

[Explanation of symbols]

 1 male pin 2 male pin receiving end 4 first elastic contact piece 5 second elastic contact piece 6 first protrusion 7 second protrusion

Claims (3)

[Scope of utility model registration request] 1. A first elastic contact piece and a second elastic contact piece, which are spaced apart from each other in parallel so as to receive an male pin and are sandwiched therebetween, and which are coupled to each other at an end portion opposite to a receiving end of the male pin, A first protrusion provided at a position where the male pin first comes into contact with the male pin when the male pin is inserted on the first elastic contact piece; and when the male pin is inserted on the second elastic contact segment, First
A second protrusion provided inside the first protrusion so as to come into contact with the elastic contact piece later than when contacting the elastic contact piece. A contact for hot-line insertion / removal, which has an electric resistivity higher than that of the elastic contact piece. 2. The hot-swap contact according to claim 1, wherein the first elastic contact piece is made of a stainless steel plate, and the second elastic contact piece is made of a phosphor bronze plate. 3. The hot-swap device according to claim 2, wherein the first and second elastic contact pieces are connected to each other by caulking at an end portion opposite to a receiving end of the male pin. contact.