JPH04129476U - Hot insertion/removal contacts - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a hot-swap contact that can maintain staggered contact function over a long period of time. [Structure] First and second elastic contact pieces (4) are arranged parallel to each other and spaced apart so as to receive and sandwich a male pin (1), and are connected to each other at an end opposite to the receiving end of the male pin. , 5); a first protrusion (6) provided on the first elastic contact piece at a position where the male pin first contacts the male pin when inserted;
Provided on the second elastic contact piece at a position inside the male pin insertion direction from the first protrusion so that when the male pin is inserted, it comes into contact with the first elastic contact piece after the contact with the first elastic contact piece. and a second protrusion (7) having a second elastic contact piece, and the electric resistivity of the first elastic contact piece is higher than the electric resistivity of the second elastic contact piece.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to hot-swapping contacts, and is particularly designed to prevent melting loss of contacts due to arcing. The present invention relates to a structure of a hot-swap contact that prevents scratches.

0002

[Conventional technology]

If an arc occurs between the contacts when inserting or removing the male pin, the contacts will be damaged. The contact shown in Figure 2 is known as a hot-swap contact to prevent this. It is. This contact receives the male pin 11 and holds it between each other. The male pin 11 is arranged parallel to the receiving end 12 and the end 13 of the male pin 11 is spaced apart from each other. The first and second elastic contact pieces 14 and 15 are connected to each other. It is. When the male pin 11 is inserted into the first elastic contact piece 14, it A first protrusion (contact part) 16 is provided at a position where contact is made for the first time. Also the second When the male pin 11 is inserted into the elastic contact piece 15, there is a contact with the first elastic contact piece 14. Inner direction of insertion of the male pin from the first protrusion 16 so as to make contact with this after the time of contact. A second protrusion (contact part) 17 is provided at the position shown in FIG.

0003 Next, the operation of such a conventional hot-swap contact will be explained. First of all, ospi When the male pin is removed, the second protrusion 17 and the male pin are removed, as shown in Fig. 2(a). 11 opens. At this time, the first protrusion 16 and the male pin 11 are still in contact. Since the second protrusion 17 and the male pin 11 are kept at the same potential, there is a no arc occurs. As the extraction process further progresses, as shown in Figure 2(b), The first protrusion 16 and the male pin 11 are separated. At this time, the first protrusion 16 and the An arc is generated between the tips 18 of the spins 11. Therefore, the first protrusion 16 and the The tip 18 of the spin 11 is damaged by the arc, but the second protrusion 17 and contacting the first and second protrusions 16 and 17 of the male pin 11 in the inserted state. The exposed parts will not be damaged by the arc.

0004 Next, when inserting the male pin, as shown in Figure 2(a), the first protrusion 16 and the male pin 11 come into contact with each other while generating an arc. Furthermore, the insertion process As it advances, the second protrusion 17 and the male pin 11 come into contact, as shown in FIG. 2(b). However, since both are kept at the same potential at this time, an arc will not occur between them. do not have. In this way, the conventional hot-swap contact generates an arc at the first protrusion 16. The second protrusion 17 prevents the generation of arcs and makes stable contact with the male pin 11. It was intended to be carried out.

[0005]

[Problem that the idea aims to solve]

In such a conventional hot-swap contact, only the first protrusion 16 is used. An arc is generated, but the high temperature caused by repeated arcing causes the contacts to break down. The metal was locally melted, and the first protrusion 16 in particular was significantly damaged. like this As the damage progresses, the first protrusion 16 cannot function as an arc contact. The hot-swap contact therefore no longer functions as a staggered contact. There was a drawback. Therefore, the present invention eliminates the above-mentioned drawbacks of the conventional methods and provides a long-term contact function with staggered contact. The purpose is to provide a hot-swap contact that can be maintained over a long period of time. .

[0006]

[Means to solve the problem]

According to the present invention, the male pins are spaced parallel to each other so as to receive and sandwich the male pins. arranged and interconnected at an end opposite the receiving end of the male pin. first and second elastic contact pieces; and the male pin on the first elastic contact piece. a first protrusion provided at a position where it first comes into contact with the When the male pin is inserted onto the second elastic contact piece, the first elastic The male pin is inserted from the first protrusion so as to come into contact with the contact piece after the time of contact with the contact piece. a second protrusion provided at an inner position in the insertion direction, the first elastic contact piece The electrical resistivity of the elastic contact piece is higher than the electrical resistivity of the elastic contact piece mentioned above. A hot-swap contact is provided.

[0007] According to the present invention, the first elastic contact piece is made of a stainless steel plate. The second elastic contact piece is made of a phosphor bronze plate.

[0008] Furthermore, according to the present invention, the first and second elastic contact pieces are arranged on the male pin. The ends opposite the receiving end are joined together by crimping.

[0009]

【Example】

An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a perspective view showing the structure of the hot-swap contact of the present invention. This contact accepts a male pin (not shown) and is placed between the contacts to sandwich it. are spaced parallel to each other at the receiving end 2 and the opposite end 3 of the male pin. The first and second elastic contact pieces 4 and 5 are connected to each other. No. The connection of the first and second resilient contact pieces 4 and 5 is such that a second resilient contact occurs at the end 3. This is accomplished by caulking the first elastic contact piece 4 between the two claws provided on the piece 5. It is appearing.

0010 When the male pin is inserted, it first comes into contact with the first elastic contact piece 4. A first protrusion (contact part) 6 is provided at the position. Also, on the second elastic contact piece 5 , when the male pin is inserted, this occurs after the time of contact with the first elastic contact piece 4. A second protrusion is located inside the male pin insertion direction from the first protrusion 6 so as to be in contact with the first protrusion 6. (Contact portion) 7 is provided.

[0011] Next, the electrical resistivity of the first elastic contact piece 4 is higher than the electrical resistivity of the second elastic contact piece 5. It is highly selected. For example, the first elastic contact piece 4 is made of a stainless steel plate. The second elastic contact piece 5 is made of a phosphor bronze plate.

0012 The function of the hot insertion/removal contact of the present invention as a staggered contact is as follows. are basically the same as conventional hot-swap contacts, so repetition is avoided. , the operation and effect different from conventional contacts will be explained. First, when removing the male pin, the gap between the first protrusion 6 and the tip 8 of the male pin 1 is Although an arc occurs, the electrical resistivity of the first elastic contact piece 4 is lower than that of the second elastic contact piece 5. Since the electric resistivity is selected to be higher than that of the first protrusion 6 and the tip of the male pin 1, The arc current flowing between the parts 8 and 8 is limited, minimizing damage to the contacts due to arc current. You can get it. However, on the other hand, in the hot insertion/removal contact of this invention, , when the second protrusion 7 and the male pin 1 are separated, a first elastic contact piece is formed between them. A potential difference corresponding to the difference between the electrical resistivity of 4 and the electrical resistivity of the second elastic contact piece 5 is generated. An arc is generated based on this. A similar phenomenon occurs when the male pin 1 is inserted, but a detailed explanation will be omitted.

[0013] In this way, in the hot insertion/removal contact of the present invention, the first and second elastic By making the electrical resistivity of the contact pieces 4 and 5 different, the first protrusion 6 and the second protrusion By appropriately sharing the damage caused by the arc current between the protrusions 7 of the We can provide hot-swap contacts that can maintain contact functionality over a long period of time. Ru.

[0014]

[Effect of the idea]

According to the present invention described above, the electrical resistivities of the first and second elastic contact pieces are different. By causing the arc current to fall between the first protrusion and the second protrusion, By allocating the scratches appropriately, the staggered contact function can be maintained over a long period of time. It is possible to provide a contact for hot insertion and extraction.

[Brief explanation of drawings]

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

FIG. 2 is a schematic diagram showing the 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. First and second elastic contact pieces arranged parallel to each other and spaced apart so as to receive and sandwich a male pin, and connected to each other at an end opposite to a receiving end of the male pin; a first protrusion provided on the first elastic contact piece at a position where the male pin first contacts the male pin when the male pin is inserted; 1st
a second protrusion provided at a position inside the male pin insertion direction from the first protrusion so as to come into contact with the elastic contact piece after the contact with the first elastic contact piece; A contact for hot insertion and removal, characterized in that the electrical resistivity is higher than the electrical resistivity of the elastic contact piece mentioned above. 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 opposite to the receiving end of the male pin. contact.