JP3554876B2 - Contact pin - Google Patents

Description

[0001]
TECHNICAL 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.
[0002]
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.
[0003]
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, in a communication device or a measuring device, a connection structure for a high frequency (RF) signal in a mounting structure such as an RF HIC or an RF substrate, or a waveguide and a coaxial line converter is connected by soldering. The present invention relates to a contact pin which can be easily attached and detached without any problem, and has a function of stress relief against external force such as dimensional displacement due to temperature change.
[0005]
[Prior art]
As shown in FIG. 3, a conventional contact pin of this type is configured by inserting a contact piece 2 formed by spirally winding a strip-shaped thin plate of a conductive material into a holder section 11 of a female pin socket 1. (See, for example, Japanese Utility Model Laid-Open No. 59-9480).
[0006]
The contact piece 2 shown in FIG. 3 is formed as a contact piece by forming a thin plate formed by press punching using a cylindrical mold into a multi-layer spiral as shown in FIG.
[0007]
When the contact piece 2 has a cylindrical shape having a narrowed portion 23 at the center thereof, the elastic force thereof is increased, and the range of permissible errors such as the size and eccentricity of the pin can be increased.
[0008]
The main contact portion with the male pin (lead of the electric component) in this structure is the central throttle portion 23.
[0009]
[Problems to be solved by the invention]
Conventional contact pins have the following problems.
[0010]
First, by narrowing down the central portion, the contact with the other party's male pin changes depending on the diameter of the male pin around the narrowed portion, so that when used for high frequencies, the frequency characteristics fluctuate.
[0011]
Secondly, 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.
[0012]
Third, the length of the male pin is limited because the central drawing part is the main contact part, and it is not possible to cope with the variation of the male pin length.
[0013]
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]
[Means for Solving the Problems]
The contact pin of the present invention is formed by processing a hollow cylinder or a solid cylinder made of a conductive and resilient metal into a hollow cylinder on one side so as to form a plurality of slits along the axis.
[0015]
The strip-shaped portions are wound so as to be alternately overlapped depending on the mold, and in parallel along the axis of the cylinder. The wound inner diameter is formed to be smaller than the corresponding male pin.
[0016]
In the prior art, the thin plates are formed in a spiral shape, but in the present invention, by alternately overlapping and winding in parallel, it is possible to maintain a stable state of deviation in the diameter of the male pin and various axial lengths. In addition, since the coil is wound in parallel with the axis, a stable coaxial line can be formed with high-frequency signal transmission characteristics.
[0017]
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 composed of a plurality of contact pieces. In the contact pin, the plurality of contact pieces extend parallel to the direction of receiving the male pin and overlap each other except for a root portion thereof, and an inner diameter of the contact portion is the same as that of the male pin except for the root portion. A contact pin characterized in that it is smaller than the outer diameter and is set uniformly.
[0018]
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.
[0019]
According to the third aspect of the present invention, the contact pin according to the second aspect is obtained, wherein the opposite portion is solid.
[0020]
According to the fourth aspect of the present invention, the contact pin according to the second aspect is obtained, wherein the opposite portion is hollow.
[0021]
According to the invention as set forth in claim 5, the contact pin material having conductivity and elasticity is processed so that at least a part thereof becomes hollow, and thereafter, a plurality of slits are formed in the hollow part in parallel with the direction of receiving the male pin. To form a plurality of contact pieces, and thereafter, the plurality of contact pieces extend in parallel to the receiving direction and overlap each other except for a root portion thereof, and further include a contact formed by the plurality of contact pieces. A method for manufacturing a contact pin, wherein the plurality of contact pieces are bent by a mold such that the inner diameter of the portion is smaller and uniform than the outer diameter of the male pin except for the root portion. .
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows a contact pin according to an embodiment of the present invention, wherein (a) and (b) are front and side views of a state before forming a contact portion, and (c) and (d) are after forming a contact portion. It is the front view and side view of the state. A hollow cylinder having a thin wall on the left side is subjected to four slits in a cross shape. In the present embodiment, four strips 30 are formed to form four strips (contact pieces) 31.
[0023]
Thereafter, the strips 31 are wound alternately in parallel with the axis using a mold.
[0024]
With such a configuration, when the male pin is inserted into the contact pin 3, many contacts are secured depending on the distance in the axial direction.
[0025]
In addition, this contact spreads the entire diameter evenly regardless of the deviation of the diameter of the male pin, so that a constant contact can be obtained.
[0026]
FIG. 2 shows an example of using the contact pins shown in FIG. In this use example, an RF signal is transmitted from PCB A of the RF substrate to PCB 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 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. . Further, since a constant coaxial path is maintained even with respect to displacement due to external force or the like, there is no significant influence on high-frequency transmission characteristics.
[0027]
【The invention's effect】
In 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 diameter of the male pin is changed. However, the frequency characteristics do not change.
[0028]
Further, 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 the high-frequency transmission characteristics are stable.
[0029]
Furthermore, 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, and the inner diameter of the contact portion is uniform. It can cope with variation in the length of the male pin.
[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 a contact portion is formed by winding, and (c) and (d) are contact portion formed by 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 cross-sectional view of an example of a conventional contact pin.
FIG. 4 is a plan view of a contact pin of the contact pin shown in FIG. 3 before being wound.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Socket 2 Contact piece 3 Contact pin 6 RF HIC
7 Coaxial line 8 HIC male pin 9 Solder part 11 Hole part 12 Post 21 Slit 22 Strip-shaped thin plate 23 Narrow part 28 Connecting piece 29 Connecting part 30 Slit 31 Strip (contact piece)

Claims (5)

The contact pin 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 a contact pin that includes a plurality of contact pieces. Except for the root portion, they extend parallel to the receiving direction of the male pin and overlap each other, and 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. A contact pin, characterized in that: 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. The contact pin according to claim 2, wherein the opposite portion is hollow. A contact pin material having conductivity and elasticity is processed so that at least a part thereof is hollow, and thereafter, a plurality of contact pieces are formed by forming a plurality of slits in the hollow portion in parallel with a direction of receiving the male pin. After that, the plurality of contact pieces extend in parallel with the receiving direction and overlap each other except for the base portion, and further, the inner diameter of the contact portion formed by the plurality of contact pieces excludes the base 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.

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