JPH1074552A - Contact pin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a contact pin with stable electric performance, without changing the contact area of electric parts with a male pin due to temperature change. SOLUTION: A contact pin 3 formed of conductive and elastic material has a contact portion consisting of plural contacting strips 31 to accept and contact a male pin. The contacting strips 31 excluding their roots are extended in parallel to the direction of accepting the male pin and lapped one another. The inner diameter of the contact portion excluding its root is uniformly set to be smaller than the outer diameter of the male pin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact pin used for a communication device and a measuring device using a high frequency signal of microwave or higher.

In particular, the present invention is suitable for a contact pin having a high-frequency signal and transmission function of a communication device mounted on an artificial satellite and a general terrestrial microwave communication device.

As individual functions, the present invention is applied to all functions necessary for microwave communication, such as an amplifier, a transmitter, a receiver, a frequency converter, and a frequency generator.

[0004] More specifically, R
The mounting structure of the HIC or RF substrate for F, or the conversion part of the waveguide part and the coaxial line, etc., can be easily attached and detached at the connection part of the high frequency (RF) signal, not by soldering, but by the temperature change. The present invention relates to a contact pin having a function of stress relief against external force such as dimensional displacement.

[0005]

2. Description of the Related Art Conventional contact pins of this kind include:
As shown in FIG. 3, there is a type in which a contact piece 2 formed by spirally winding a strip-shaped thin plate of a conductive material is inserted into a holder 11 of a socket 1 of Mespin (for example, Japanese Utility Model Application Laid-Open No. 59-9480). Reference).

The contact piece 2 shown in FIG. 3 is a contact piece formed by forming a thin plate formed by press punching as shown in FIG. 4 by a cylindrical mold into a multi-layer spiral.

When the contact piece 2 is formed in a cylindrical shape having a narrowed portion 23 at the center thereof, the elastic force thereof is increased, and the allowable range of the pin size and the amount of eccentricity can be increased.

[0008] Male pin in this structure (lead of electrical parts)
The main contact portion is the central throttle portion 23.

[0009]

The conventional contact pins have the following problems.

First, by narrowing down the central portion, the contact with the other party's male pin is changed by the diameter of the male pin around the narrowed portion, so that when used for high frequencies, the frequency characteristics fluctuate.

Second, since a thin flat plate is formed, when used for a high-frequency coaxial line, the outer diameter is not constant and the high-frequency transmission characteristics are not stable. In addition, the main coaxial line always has a split structure.

Third, since the central diaphragm portion is used as a main contact portion, the length of the male pin is restricted, and the variation of the male pin length cannot be accommodated.

As described above, the conventional contact pins are suitable for connection of analog and digital signals, AC and DC power supplies, but are not suitable for connection of high-frequency signals.

[0014]

SUMMARY OF THE INVENTION A contact pin according to the present invention is formed by forming a hollow cylinder or a solid cylinder made of a conductive and elastic metal into a hollow cylinder on one side, and forming a strip along the axis. In order to make multiple slits.

The strip-shaped portions are wound alternately in parallel with each other along the axis of the cylinder, depending on the mold. The wound inner diameter is formed to be smaller than the corresponding male pin.

In the prior art, the thin plates are formed in a spiral shape, but in the present invention, by alternately stacking and winding them in parallel, it is possible to maintain a stable contact state at the deviation of the diameter of the ospin and at various lengths in the axial direction. . Further, since the coil is wound in parallel with the axis, a stable coaxial line can be formed with high-frequency signal transmission characteristics.

That is, according to the first aspect of the present invention, the contact portion is made of a material having conductivity and elasticity, has a contact portion that receives and contacts the male pin, and the contact portion is formed by a plurality of contact pieces. In the contact pin that has been, the plurality of contact pieces, except for the root portion thereof, extend parallel to the direction in which the male pin is received and overlap each other,
A contact pin is obtained in which the inner diameter of the contact portion is set to be smaller and uniform than the outer diameter of the male pin except for the root portion.

According to the second aspect of the present invention, there is provided the contact pin according to the first aspect, wherein a support is provided at a portion opposite to the contact portion.

According to the third aspect of the invention, there is provided the contact pin according to the second aspect, wherein the opposite portion is solid.

According to a fourth aspect of the present invention, there is provided the contact pin according to the second aspect, wherein the opposite portion is hollow.

According to the fifth aspect of the present invention, the contact pin material having conductivity and elasticity is processed so that at least a part thereof is hollow, and then a plurality of contact pins are formed in the hollow portion in parallel with the direction of accepting the male pin. A plurality of contact pieces are formed by forming a slit, and thereafter, the plurality of contact pieces extend in parallel with the receiving direction and overlap with each other, except for a root portion thereof, and are further formed by the plurality of contact pieces. A method of manufacturing a contact pin, wherein the plurality of contact pieces are bent by a mold such that an inner diameter of a contact portion to be formed is smaller and uniform than an outer diameter of the male pin except for the root portion. Is obtained.

[0022]

FIG. 1 shows a contact pin according to an embodiment of the present invention, wherein (a) and (b) are a front view and a side view of a state before a contact portion is formed by winding, and (c) and (d). FIGS. 4A and 4B are a front view and a side view in a state after winding forming of a contact portion. A hollow cylinder whose left side is thinned is slit into four crosses. In the present embodiment, four strips 30 are formed to form four strip pieces (contact pieces) 31.

Thereafter, the strips 31 are alternately wound in parallel with the axis using a mold.

With such a configuration, when the male pin is inserted into the contact pin 3, a large number of contacts are secured depending on the distance in the axial direction.

In addition, this contact can obtain a constant contact because the entire diameter spreads uniformly regardless of the deviation of the diameter of the male pin.

FIG. 2 shows an example of using the contact pins shown in FIG. This usage example is from PCB A to PCB for RF
The RF signal is transmitted to B, and the HIC 6 for RF is used on the way. The connection between the HIC 6 and each PCB is a coaxial path 7 using the contact pins 3. The contact pins 3 are soldered to the respective PCBs, and are connected to the HIC male pins 8 in a coaxial path. Since the male pin 8 is inserted deeply into the wound portion of the contact pin 3, good and stable contact is maintained. In this structure, even if a displacement occurs due to an external force such as a temperature change in the distance between the HIC and the PCB, the connection portion does not generate stress at the soldered portion 9 of the PCB or at the root of the male pin 8 of the HIC 6 due to the stress relief function. . In addition, since a constant coaxial path is maintained even for displacement due to external force or the like, there is no significant influence on high-frequency transmission characteristics.

[0027]

According to the contact pin of the present invention, since the contact piece extends in parallel to the direction of receiving the male pin and the inner diameter of the contact portion is uniform, when the contact pin of the present invention is used for high frequency, The frequency characteristics do not fluctuate even if the diameter is changed.

When the contact pin of the present invention is used for a high-frequency coaxial line, the contact pin of the present invention has a uniform inner diameter of the contact portion as described above, so that high-frequency transmission characteristics are stable.

Further, in the contact pin of the present invention, as described above, the contact piece extends in parallel to the direction of receiving the male pin,
Since the inner diameter of the contact portion is uniform, restrictions on the length of the male pin are smaller than in the related art, and it is possible to cope with a variation in the male pin length.

[Brief description of the drawings]

FIG. 1 shows a contact pin according to an embodiment of the present invention, wherein (a) and (b) are a front view and a side view of a state before forming a contact part by winding, and (c) and (d) are contact part winding. It is the front view and side view of a back state.

FIG. 2 is a sectional view showing a use state of the contact pin shown in FIG. 1;

FIG. 3 is a sectional view of an example of a conventional contact pin.

FIG. 4 is a plan view of the contact pin of FIG. 3 before the contact piece is formed by winding;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Socket 2 Contact piece 3 Contact pin 6 HIC for RF 7 Coaxial line 8 HIC male pin 9 Solder part 11 Hole part 12 Support post 21 Slit 22 Strip-shaped thin plate 23 Narrow part 28 Connection piece 29 Connection part 30 Slit 31 Strip piece (contact piece)

Claims (5)

[Claims] 1. A contact pin comprising a material having conductivity and elasticity, receiving a male pin and contacting the male pin, wherein the contact part is a contact pin comprising a plurality of contact pieces. Except for the root portion, the contact piece extends in parallel with the direction of receiving the male pin and overlaps each other, and the inner diameter of the contact portion is smaller and uniform than the outer diameter of the male pin except for the root portion. A contact pin, wherein the contact pin is set to: 2. The contact pin according to claim 1, wherein a support is provided at a portion opposite to the contact portion. 3. The contact pin according to claim 2, wherein said opposite portion is solid. 4. The contact pin according to claim 2, wherein said opposite portion is hollow. 5. A method of processing a contact pin material having conductivity and elasticity so that at least a part thereof is hollow, and thereafter forming a plurality of slits in said hollow portion in parallel with a direction of accepting male pins. Make up the contact piece,
Thereafter, the plurality of contact pieces, excluding the root portion, extend parallel to the receiving direction and overlap each other, and further have an inner diameter of a contact portion formed by the plurality of contact pieces, excluding the root portion, A method of manufacturing a contact pin, wherein the plurality of contact pieces are bent by a mold so as to be smaller and uniform than the outer diameter of the male pin.