JPS5873973A - Low temperature connector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a connector for mounting low-temperature devices that is used at low temperatures such as liquid nitrogen and liquid helium temperatures.

Connectors as electronic components have traditionally been used at around room temperature. In recent years, with the ultra-high speed and capacity of computers, there has been active research into the practical application of gallium arsenide compound semiconductors and Josephson elements based on new principles, instead of silicon devices. All of these new elements are used in liquid nitrogen or liquid helium, and only when they are densely packaged will it be possible to make computers extremely fast. Therefore, there was a desire to develop a connector suitable for high-density mounting at low temperatures.

Conventional connectors use spring material to mold the contacts.
A structure was adopted in which contact force was applied by the spring force when mating. Since the contact force from the spring force is used in this way, it is difficult to reduce the dimensions and there are limits to miniaturization, and it is extremely difficult due to the structure to increase the density of connector terminals to more than 1. This was a problem in high-density packaging. Furthermore, when the number of connector terminals is increased to 50 or more, the insertion and removal force of a normal connector becomes large, and there is a drawback that it is generally impossible to connect and remove the connector. To solve this problem, a mechanism is provided to widen or narrow the gap between the female contacts of opposing pairs of female connectors. A no-insertion/extraction-force connector called ZIF was developed in which the distance between the connectors was narrowed and the connectors were brought into contact with each other, but the structure was complicated and it was not suitable for miniaturizing the connector.

In view of the above-mentioned points, the present invention provides a low-temperature connector that does not require a conventional mechanism, requires no insertion/extraction force, is compact, and can be mounted at high density.

FIG. 1 shows an embodiment of the present invention, in which 1 is a male contact of a male connector, which is made of Fe-56wt%N1 alloy, for example, with a thickness of 0,151111, a width of 0.4 m, and a length of 5 m. Low shrinkage material 2 and Cu −! For example, Au plating with a thickness of 0.2μ is applied on a material made of i3% Zn alloy, which is laminated with a high shrinkage material 3 at low temperature, having a thickness of 0.15cm, a width o, '$1111, and a length 5-. This is what I did. 4 is A
This is a male contact support member made of BS resin, and supports one end of the male contacts 1 arranged in a row embedded therein.

Reference numeral 5 denotes a housing of a female connector made of ABSW, which is fixed to a main body 6 and one end side of the main body 6, and fixes one end of six pairs of female contacts 8 arranged in a row facing therebetween. It consists of a presser plate 7.

The female contact 8 is, for example, C with a thickness of 0.2 μm+ and a width of 0.6 μm.
It consists of a U plate with Au plating applied to it.

When the female connector and the male connector are fitted together, at room temperature there is a gap between the male contact 1 and the female contact 8, as shown in FIG. 1(b), so that no contact force is generated. ,
The spacing between the two opposing female contacts 4 is selected so that at low temperatures, the male contact 1 bends as shown in Figure 1 (C) and a contact force is generated between the male contact 1 and the female contact 8. ing. Therefore, if both the male and female connectors are connected and disconnected at room temperature, almost no insertion or removal force is required.

If the dimensions of the male contact 1 and the female contact pre-electric are as shown in the above example, and the numbers of both female contacts of the opposing pair are set, and the distance between the contacts is t-0,5, then immersed in liquid nitrogen. Then, since the amount of deflection at the tip of the male contact 1 is approximately 0.4 mm, the contact force of the male and female solid contacts 1 when both male and female connectors are fitted becomes 100 f or more, and the contact resistance is 0. Very low and stable contact characteristics of .1 ml or less were obtained. Male and female contacts1.
Even if the width dimension of 8 is made even smaller, sufficient contact force can be obtained through the operation described above, the terminal spacing can be reduced to 1 m or less, and the number of terminals can be much larger than before because there is no insertion/extraction force. .

FIG. 2 shows another embodiment, in which 11 is a female contact,
Fe-56%Ni alloy, for example, thickness 0.1 gourd, width 0.8
The low shrinkage material 12 is made of a Cu-55% Zn alloy, for example, with a thickness of 0.11111% and a width of 0.8 m, stretched together. For example, only the side in contact with is plated with Au with a thickness of 2 μm. Reference numeral 14 denotes a female connector housing made of ABS resin, which includes a main body 15 and a holding plate 16 that is fixed to one end of the main body 15 and fixes the right-angled bent portion of one end of the female contact 11. There is. 17 is made of bronze with a thickness of 0.2 mm and a width of 0.5 mm. This is a male contact with a length of 4 mm, and its surface is plated with Au to a thickness of 2 pm. Reference numeral 18 denotes a male contact support member of a male connector made of ABS resin in which one end of each of the male contacts 17 arranged in a row is embedded.

When the male connector and the female connector are mated, the distance between the opposing pairs of male and female contacts 11 and 11 is as shown in FIG. 2(b) at room temperature. There is a gap between the contact member 17 and the high shrinkage material of the contact member 11 so that no contact force is generated. 12 and the low shrinkage material plate 13 due to the deformation due to the difference in shrinkage, the male contact 17 and ? 1 contactor 11 so that a contact force is generated between them.

The dimensions of the male contact 17 and the female contact 11 are set as in the above example, and the distance between the opposing male and female contacts 11 is set to 0.5-
In this case, when used in liquid nitrogen T, the contact force between the male and female contacts was 150 f or more, and extremely low and stable contact characteristics were obtained with p1 contact resistance of 0.1 ml or less. Male contact 1
Since the widths of 7 and the female contact can be made smaller than in the above example, the terminal spacing can be reduced to 1 m or less, resulting in a compact design.

As described above, in the present invention, one of the male and female contacts is formed by laminating high-shrinkage material and low-shrinkage material at low temperature, and the contact force between the two liquid contactors at room temperature is Since the contact force is generated between the male and female contacts by deforming at low temperatures, it is possible to fully demonstrate its function even if the width of the contact is small, and there is no need for insertion or removal. It does not require any other mechanism to generate force, so it can be made compact and has a high density terminal, and it also avoids the deterioration of contact performance due to deterioration of springiness as in conventional spring material contacts. Therefore, the contact performance does not deteriorate over a long period of time, resulting in excellent reliability.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the present invention, in which (a) is a sectional view, FIG.
C) is a cross-sectional view showing the fitted state at low temperature, FIG. 2 shows another embodiment, FIG. 2(a) is a ti cross-sectional view, and FIG. , the same figure (C) is 12 at low temperature.
...Low shrinkage material at low temperature, 3.13...High shrinkage material at low temperature'#-j diagram ((1) (θ), .1., (C)

Claims (1)

[Claims] One of the male and female contacts is made of a material laminated with a high-shrinkage material and a low-shrinkage material at low temperatures, and when the male and female connectors are mated, there is a gap between the two liquid contactors at normal temperature. □There is no contact force generated between the two contacts, but at low temperatures, the contact force is generated between the two contact pieces due to the deformation of the contact hand formed by stretching a high-shrinkage material and a low-shrinkage material at low temperatures. Characteristic low-temperature connector.