JP5627251B2 - Coaxial connector contact portion characteristic measuring instrument and coaxial connector contact portion characteristic measuring method - Google Patents

Description

The present invention relates to a contact portion characteristic measuring device for a coaxial connector and a contact portion characteristic measuring method for a coaxial connector, and in particular, electrical characteristics of a contact portion between a pair of inner conductor terminals constituting a pair of coaxial connectors connected to each other. It is related with the contact part characteristic measuring device of the coaxial connector for measuring, and the contact part characteristic measuring method of the coaxial connector .

  2. Description of the Related Art Conventionally, in the field of automobiles and the like, the coaxial connector 100 shown in FIG. 6 is known as a coaxial connector 100 connected to a terminal portion of a coaxial cable. As shown in the figure, a coaxial cable 101 connected to the coaxial connector 100 includes a core wire 103, an internal insulator 104 covering the core wire 103, a braid 105 covering the outer periphery of the internal insulator 104, And an insulating sheath 106 that covers the braid 105. The braid 105 is folded back onto the insulating sheath 106 and processed so that it can be connected to an outer conductor terminal 108 described later.

  The coaxial connector 100 includes an inner conductor terminal 107 connected to the core wire 103 of the coaxial cable 101, an outer conductor terminal 108 connected to the braid 105 of the coaxial cable 101, and a dielectric 109. The inner conductor terminal 107 includes a pair of inner conductor caulking pieces 110 that crimp the core wire 103 of the coaxial cable 101 and crimp the core wire 103, and a counterpart connection terminal 111 to which the counterpart inner conductor terminal is connected. Is formed.

  The outer conductor terminal 108 includes a bottom wall portion 112, a cylindrical portion 113 that is erected from the bottom wall portion 112 and connected to a counterpart outer conductor terminal that is formed into a cylindrical shape by bending, and a bottom wall portion. An outer conductor caulking piece 114 for crimping the braid 105 by crimping the braid 105 standing up from 112, and a dielectric caulking piece attached to the dielectric 109 by caulking the dielectric 109 standing up from the bottom wall 112 115 are integrally formed. The dielectric 109 covers the outer periphery of the counterpart connection terminal 111.

  Next, a method for manufacturing the coaxial connector 100 described above will be described. First, the dielectric 109 is formed on the outer periphery of the mating connection terminal 111 by insert molding or the like. Next, the inner conductor caulking piece 110 of the inner conductor terminal 107 is crimped and crimped to the core wire 103 of the coaxial cable 101. Thereafter, the inner conductor terminal 107 attached to the coaxial cable 101 is disposed on the bottom wall portion 112 of the outer conductor terminal 108, the dielectric caulking piece 115 is crimped, and the outer conductor terminal 108 is attached to the inner conductor terminal 107. Further, the outer conductor caulking piece 114 is crimped to crimp the braid 105. The connector 100 described above can manufacture a low-cost coaxial connector 102 using sheet metal.

  In the coaxial connector 100 having the above-described configuration, the contact resistance of the contact portion between the pair of inner conductor terminals 107 constituting the pair of coaxial connectors 100 connected to each other for performance improvement, high frequency characteristics due to generation of a surface oxide film, etc. It is required to understand the impact of For this reason, conventionally, a pair of coaxial connectors 100 as a product are connected to each other, and a high frequency electrical characteristic is measured using a spectrum analyzer or the like.

  However, in the coaxial connector 100 configured as described above, in order to caulk the outer conductor caulking piece 114 and the dielectric caulking piece 115, it is necessary to provide an opening in the outer conductor terminal 108 as shown in FIG. For this reason, the end of the inner conductor terminal 107 opposite to the coaxial cable 101, that is, the periphery of the contact portion between the pair of inner conductor terminals 107 (specifically, the contact portion between the counterpart connection terminals 111) is the outer conductor terminal. 108 is not covered. Moreover, since the pair of inner conductor terminals 107 are in contact with each other with their end portions in contact with each other, the periphery of the contact portion between the inner conductor terminals 107 cannot be covered with the dielectric 109.

  For this reason, in the conventional method of connecting a pair of coaxial connectors 100 to be a product and measuring the high frequency characteristics, the coaxial structure around the contact portion between the inner conductor terminals 107 is broken, and the coaxial connector 100 is configured. The influence of the outer conductor terminal 108 and the dielectric 109 is greatly included in the high frequency characteristics, and it is difficult to grasp the influence on the high frequency characteristics only by the contact portion between the inner conductor terminals 107. Moreover, as a measuring device which measures the high frequency characteristic of the coaxial connector 100, what was described in patent documents 1-5 is mentioned, for example.

JP 2008-82734 A JP 2005-198253 A JP 2003-258403 A JP 2001-99862 A JP 58-38003 A

Thus, the present invention provides a contact measuring instrument for a coaxial connector and a method for measuring a contact portion of a coaxial connector, which can accurately measure only the electrical characteristics of the contact portion between a pair of inner conductor terminals constituting the pair of coaxial connectors. Is an issue.

  The invention described in claim 1 for solving the above-described problem is a contact portion of a coaxial connector for measuring electrical characteristics of a contact portion between a pair of inner conductor terminals constituting a pair of coaxial connectors connected to each other. A characteristic measuring instrument having a pair of measuring inner conductors whose one end is provided in the same shape as the end on the contact portion side of the pair of inner conductor terminals, and the one end being in contact with each other. A measurement cylinder portion provided with a cylindrical dielectric body into which the pair of measurement inner conductors are inserted and a cylindrical outer conductor covering the dielectric body, and provided at both ends of the measurement cylinder portion. A coaxial connector contact portion characteristic measuring instrument comprising: a first coaxial connector portion and a second coaxial connector portion that are electrically connected to the other end portions of the pair of inner conductors for measurement, respectively. Exist.

  The invention according to claim 2 is characterized in that the first coaxial connector portion is provided at an interval from an end portion of the measurement tube portion, and is provided between the first coaxial connector portion and the measurement tube portion. And the other end of the inner conductor for measurement is connected to the end of the inner conductor of the first coaxial connector portion and the other end is on the first coaxial connector portion side of the pair of inner conductors for measurement. A coaxial cable provided with an inner conductor to be connected to the taper, wherein the coaxial cable is inserted into an end of the measurement tube portion, and the diameter of the tube decreases as it approaches the first coaxial connector portion. 2. The coaxial connector contact portion characteristic measuring instrument according to claim 1, wherein a cylindrical portion and a screw screwed to an outer periphery of the tapered cylindrical portion are provided.

According to a third aspect of the present invention, the measurement tube portion includes a first tube portion that accommodates a contact portion between the pair of measurement inner conductors, an inner conductor of the coaxial cable, and the pair of measurement inner conductors. 3. The coaxial connector contact according to claim 2, wherein the coaxial connector is divided into a second tube portion that accommodates a connection portion with the other end portion of the inner conductor for measurement on the first coaxial connector portion side. It exists in the part characteristic measuring instrument.
The invention according to claim 4 is a method for measuring contact portion characteristics of a coaxial connector for measuring electrical characteristics of a contact portion between a pair of inner conductor terminals constituting a pair of coaxial connectors connected to each other. Item 4. A method for measuring contact portion characteristics of a coaxial connector, wherein the contact portion property measuring instrument according to any one of Items 1 to 3 is used to measure electrical characteristics of the contact portion .

As described above, according to the first or fourth aspect of the present invention, a pair of measuring inner conductors having a contact portion having the same shape as the inner conductor terminal used in the product is inserted into the dielectric of the measuring cylinder portion, If a device for measuring electrical characteristics such as a spectrum analyzer is connected via the first coaxial connector portion and the second coaxial connector portion, a pair of measuring inner conductors having the same shape as the contact portions of the pair of inner conductor terminals Since the electrical characteristics can be measured with the contact portion covered with the dielectric of the measuring cylinder and the outer conductor (that is, in an ideal coaxial structure), the electrical characteristics of only the contact portion between the pair of inner conductor terminals Can be measured with high accuracy. Further, the electrical characteristics of the contact portions of various types of inner conductor terminals can be measured by changing the shapes of the inner conductor for measurement and the dielectric of the measurement tube portion.

  According to the second aspect of the present invention, when the screw is turned to the measurement tube portion side, the coaxial cable slides to the measurement inner conductor side by being pushed by the taper tube portion to increase the contact load between the pair of inner conductor terminals. be able to. That is, since the contact load of the pair of inner conductors for measurement can be arbitrarily adjusted by the screw, the electrical characteristics at an arbitrary contact load can be measured.

  According to the third aspect of the invention, since the measurement tube portion can be divided into the first tube portion and the second tube portion, it is easy to insert the measurement inner conductor and the coaxial cable into the measurement tube portion.

It is a side view which shows one Embodiment of the contact part characteristic measuring device of the coaxial connector of this invention. It is a disassembled perspective view of the contact part characteristic measuring device of the coaxial connector shown in FIG. It is the sectional view on the AA line of FIG. It is the elements on larger scale of the B section of FIG. It is explanatory drawing for demonstrating the measurement of the high frequency electrical property using the contact part property measuring device of the coaxial connector shown in FIG. It is a perspective view which shows an example of a coaxial connector.

  Hereinafter, the contact characteristic measuring instrument of the coaxial connector according to the present invention will be described with reference to FIGS. The coaxial connector contact portion characteristic measuring instrument 1 of the present invention (hereinafter simply referred to as a contact portion measuring instrument) is a pair of inner conductor terminals constituting a pair of coaxial connectors 100 as shown in FIG. It is a measuring device for measuring the high frequency electrical characteristics of the contact part of 107.

  As shown in the figure, the contact portion property measuring instrument 1 includes a pair of measuring inner conductors 21 and 22, a measuring tube portion 3, a first coaxial connector portion 4 and a second coaxial connector portion 5, and a coaxial cable. And semi-rigid 6. The pair of measuring inner conductors 21 and 22 are in contact with each other at one end. One end portions of the pair of measurement inner conductors 21 and 22 that are in contact with each other have the same shape as the end portions on the contact portion side of the pair of inner conductor terminals 107 (FIG. 6) that make up the product connector. Is provided.

  Specifically, as shown in FIG. 4, one end of the measurement inner conductor 21 is provided in a hemispherical shape, and one end of the measurement inner conductor 22 is provided in a plane. Further, the other end portions of the pair of measurement inner conductors 21 and 22 are simply provided in a bar shape, and are not formed with caulking pieces 110 or the like unlike the inner conductor terminal 107 which is a product.

  As shown in FIG. 3, the measurement cylinder portion 3 includes a cylindrical dielectric 31 into which the pair of measurement inner conductors 21 and 22 in a state in which one end portions are in contact with and in contact with each other, and a dielectric A cylindrical outer conductor 32 that covers the body 31 is provided. The dielectric 31 is divided into three parts in the longitudinal direction. The first coaxial connector portion 4 and the second coaxial connector portion 5 are provided on both ends of the measurement tube portion 3. As shown in FIGS. 2 and 3, the first coaxial connector portion 4 and the second coaxial connector portion 5 are respectively provided with inner conductors 41 and 51 and cylindrical dielectrics 42 and 52 covering the inner conductors 41 and 51. And a cylindrical outer conductor 43, 53 covering the dielectrics 42, 52, and a coaxial structure.

  The first coaxial connector portion 4 is provided at an interval in the longitudinal direction from the end portion of the measurement tube portion 3. Further, the inner conductor 41 of the first coaxial connector portion 4 is electrically connected to the other end portion of the measuring inner conductor 21 via an inner conductor 61 of the semi-rigid 6 described later. On the other hand, the second coaxial connector portion 5 is provided integrally with the measurement tube portion 3 so as to continue to the end portion of the measurement tube portion 3. That is, the inner conductor 51 constituting the second coaxial connector 5 is provided integrally with the measurement inner conductor 22 provided in the measurement cylinder portion 3, and the dielectric 52 constituting the second coaxial connector portion 5 is provided as the measurement cylinder. An outer conductor 53 provided integrally with the dielectric 31 provided in the portion 3 and constituting the second coaxial connector portion 5 is provided integrally with the outer conductor 32 provided in the measurement tube portion 3.

  The semi-rigid 6 is provided in a coaxial structure including an inner conductor 61, a cylindrical dielectric 62 that covers the inner conductor 61, and a cylindrical outer conductor 63 that further covers the dielectric 62. Unlike the braid 105 shown in FIG. 6, the outer conductor 63 of the semi-rigid 6 is provided in a cylindrical shape having no joints or holes. Further, the dielectric 62 and the outer conductor 63 are removed at both ends of the semi-rigid 6, and the inner conductor 61 is exposed from the dielectric 62 and the outer conductor 63.

  The semi-rigid 6 is provided between the first coaxial connector portion 4 and the measurement tube portion 3. The inner conductor 61 of the semi-rigid 6 has one end connected to the end of the inner conductor 41 of the first coaxial connector section 4 and the other end of the pair of inner conductors 21 and 22 for the first coaxial connector section 4. It is connected to the other end of the inner conductor 21 for measurement on the side.

  A semi-rigid 6 is inserted into the end of the measurement tube portion 3 on the first coaxial connector portion 4 side, and a tapered tube portion 33 having a tapered diameter that decreases as it approaches the first coaxial connector portion 4; A screw 34 that is screwed to the outer periphery of the tapered tube portion 33 is provided. The taper cylinder part 33 is provided with a thread on the outer surface thereof. The tapered cylindrical portion 33 is formed thin and its side surface portion is easily bent toward the semi-rigid 6. Further, as shown in FIG. 1, the tapered cylindrical portion 33 is provided with a notch 33 a along the longitudinal direction, so that the side surface portion of the tapered cylindrical portion 33 is more easily bent toward the semi-rigid 6. . The screw 34 is provided in a ring shape, and a screw thread that is screwed with the outer surface of the tapered cylindrical portion 33 is provided on the inner surface thereof.

  As described above, by providing the tapered cylindrical portion 33 and the screw 34, when the screw 34 is turned to the measurement cylindrical portion 3 side, the side surface portion of the tapered cylindrical portion 33 is tightened by the screw 34 and bent toward the semi-rigid 6 to be tapered. The end of the cylindrical portion 33 on the first coaxial connector portion 4 side pushes the semi-rigid 6 toward the measurement inner conductors 21 and 22, and the semi-rigid 6 slides toward the measurement inner conductor 21. Thereby, the inner conductor 21 for measurement can slide toward the inner conductor 22 for a measurement, and the contact load of a pair of inner conductors 21 and 22 for a measurement can be enlarged.

  On the contrary, when the screw 34 is turned to the first coaxial connector portion 4 side, the tightening of the taper tube portion 33 by the screw 34 is loosened, and the side surface portion of the taper tube portion 33 is restored in the direction away from the semi-rigid 6 and the taper tube portion. The force by which the end of 33 on the first coaxial connector 4 side pushes the semi-rigid 6 toward the inner conductors 21 and 22 for measurement is loosened. As a result, the semi-rigid 6 slides toward the first coaxial connector portion 4 side, the measuring inner conductor 21 slides away from the measuring inner conductor 22, and the contact load between the pair of measuring inner conductors 21 and 22 is increased. Get smaller. That is, the contact load between the pair of inner conductors 21 and 22 for measurement can be arbitrarily adjusted by the screw 34.

  Further, the measurement cylinder portion 3 accommodates a first cylinder portion 35 that accommodates a contact portion between the pair of measurement inner conductors 21 and 22, and a connection portion between the inner conductor 61 of the semi-rigid 6 and the measurement inner conductor 21. The second cylindrical portion 36 is divided. The dielectric 31 is provided only in the first cylinder part 35 and is not provided in the second cylinder part 36.

  Next, an example of the assembly procedure of the contact part property measuring instrument 1 having the above-described configuration will be described. First, the inner conductor 51 for measurement and the inner conductor 51 side of the inner conductor 51 of the second coaxial connector 5 are inserted into the dielectric 31. At this time, the inner conductor 51 is inserted into the dielectric 52 provided integrally with the dielectric 31, and the measurement inner conductor 22 is inserted into the dielectric 31. Next, the dielectric 52 side of the dielectrics 31 and 52 provided integrally with each other is inserted into the outer conductor 32. At this time, the dielectric 52 is inserted into the outer conductor 53 provided integrally with the outer conductor 32, and the dielectric 31 is inserted into the outer conductor 32. Further, both ends of the inner conductor 61 of the semi-rigid 6 are soldered and connected to the other end portion of the measuring inner conductor 21 and the end portion of the inner conductor 41 of the first coaxial connector portion 4. Thereafter, the inner conductor 41, the semi-rigid 6 and the inner conductor 41 side of the measurement inner conductor 21 soldered to each other are inserted into the dielectric 42, and the inner conductor 41 and the inner conductor 61 of the semi-rigid 6 are inserted into the dielectric 42. Insert the end. Thereafter, the dielectric 42 is inserted into the outer conductor 43.

  Further, the second cylindrical portion 36 is inserted from the measurement inner conductor 21 side of the inner conductor 41, the semi-rigid 6 and the measurement inner conductor 21 which are soldered to each other. At this time, it inserts so that the end of the inner conductor 21 for a measurement may protrude from the 2nd cylinder part 36. FIG. Next, after inserting one end of the measurement inner conductor 21 protruding from the second cylinder portion 36 into the dielectric 31 until it abuts on one end of the measurement inner conductor 22, the second cylinder portion 36 is then inserted into the first cylinder portion 35. Close to complete.

  Next, an example of the measurement of the high frequency characteristic using the contact part characteristic measuring instrument 1 mentioned above is demonstrated with reference to FIG. As shown in the figure, the contact portion property measuring instrument 1 and the spectrum analyzer 7 are connected. Specifically, a connector attached to one end of the pair of measurement cables 81 and 82 is connected to the first coaxial connector portion 4 and the second coaxial connector portion 5 of the contact portion characteristic measuring instrument 1, respectively. A connector attached to the other end of the measurement cables 81 and 82 is connected to the spectrum analyzer 7. A frequency analysis result of the spectrum analyzer 7 is used to measure high frequency characteristics using a personal computer (PC) 9.

  Specifically, the transmission loss at the contact portion of the measurement inner conductors 21 and 22 at each contact load can be obtained by adjusting the screw 34 to change the contact load of the measurement inner conductors 21 and 22. Since the contact portions of the measurement inner conductors 21 and 22 have the same shape as the contact portion of the inner conductor terminal 107 as a product, the obtained transmission loss is the same as the transmission loss at the contact portion of the inner conductor terminal 107 as a product. It is. Further, if the relationship between the contact load and the contact resistance of the measuring inner conductors 21 and 22 is examined in advance, the relationship between the contact resistance and the transmission loss can be examined.

  According to the contact part characteristic measuring instrument 1 described above, a pair of measuring inner conductors 21 and 22 having a contact part having the same shape as the inner conductor terminal 107 used in the product is inserted into the dielectric 31 of the measuring cylinder part 3. If a device for measuring electrical characteristics such as the spectrum analyzer 7 is connected via the first coaxial connector portion 4 and the second coaxial connector portion 5 as described above, the contact portions of the pair of inner conductor terminals 107 are the same. The electrical characteristics can be measured in a state where the contact portions of the pair of measuring inner conductors 21 and 22 are covered with the dielectric 31 and the outer conductor 32 of the measuring tube portion 3 (that is, in an ideal coaxial structure). Therefore, it is possible to accurately measure the electrical characteristics of only the contact portion between the pair of inner conductor terminals 107. Further, by changing the shapes of the measurement inner conductors 21 and 22 and the dielectric 31 of the measurement tube portion 3, the high frequency electrical characteristics of the contact portions of various types of inner conductor terminals 107 can be measured.

  Moreover, according to the contact part property measuring instrument 1 described above, the contact load of the pair of inner conductors 21 and 22 can be arbitrarily adjusted by providing the semi-rigid 6, the tapered cylindrical part 33, and the screw 34. It is possible to measure high-frequency electrical characteristics at any contact load.

  Further, according to the contact part characteristic measuring instrument 1 described above, the measurement cylinder part 3 can be divided into the first cylinder part 35 and the second cylinder part 36, so that the measurement inner conductors 21 and 22 and the semi-rigid are provided in the measurement cylinder part 3. 6 is easy to insert.

  In addition, according to embodiment mentioned above, although the semirigid 6 was provided as a coaxial cable, this invention is not limited to this. The coaxial cable may be a coaxial cable including an inner conductor, a dielectric covering the inner conductor, and an outer conductor covering the dielectric, and may not be the semi-rigid 6.

  In addition, according to embodiment mentioned above, although the semirigid 6 and the taper cylinder part 33 were provided so that contact load could be adjusted arbitrarily, this invention is not limited to this. For example, if it is not necessary to measure the characteristics with respect to the contact load, the first coaxial connector part 4 is simply integrated with the measurement cylinder part 3 in the same manner as the second coaxial connector part 5 without providing the semi-rigid 6 and the tapered cylinder part 33. The inner conductor 4 of the first coaxial connector portion 4 and the inner conductor for measurement 21 may be directly connected.

  Further, the above-described embodiments are merely representative forms of the present invention, and the present invention is not limited to the embodiments. That is, various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Contact part characteristic measuring device of coaxial connector 3 Measuring cylinder part 4 1st coaxial connector part 5 2nd coaxial connector part 6 Semi-rigid (coaxial cable)
31 Dielectric 32 Outer conductor 21 Inner conductor for measurement 22 Inner conductor for measurement 33 Tapered cylinder part 34 Screw 35 First cylinder part 36 Second cylinder part 100 Coaxial connector 107 Inner conductor terminal

Claims (4)

A contact property measurement device for a coaxial connector for measuring electrical properties of a contact portion between a pair of inner conductor terminals constituting a pair of coaxial connectors connected to each other,
A pair of measuring inner conductors each having one end portion provided in the same shape as the end portion on the contact portion side of the pair of inner conductor terminals;
A measurement cylinder portion provided with a cylindrical dielectric body into which the pair of inner conductors for measurement in a state where the one end portions are in contact with and in contact with each other, and a cylindrical outer conductor covering the dielectric body; ,
A first coaxial connector portion and a second coaxial connector portion that are respectively electrically connected to the other end portions of the pair of inner conductors for measurement provided on both ends of the measurement cylinder portion;
A contact connector characteristic measuring instrument for a coaxial connector, comprising: The first coaxial connector portion is provided at an interval from an end of the measurement tube portion;
Provided between the first coaxial connector portion and the measurement tube portion, and one end is connected to the end portion of the inner conductor of the first coaxial connector portion and the other end is the pair of measurement inner conductors. A coaxial cable provided with an inner conductor connected to the other end of the inner conductor for measurement on the first coaxial connector portion side,
The coaxial cable is inserted into an end portion of the measurement tube portion, and is tapered to the outer periphery of the tapered tube portion with a tapered tube portion having a tube diameter that decreases as the first coaxial connector portion is approached. The contact part characteristic measuring device of the coaxial connector according to claim 1, wherein a screw is provided. The measurement tube portion includes a first tube portion that accommodates a contact portion between the pair of measurement inner conductors, and an inner conductor of the coaxial cable and the pair of measurement inner conductors on the first coaxial connector portion side. The coaxial connector contact portion property measuring instrument according to claim 2, wherein the coaxial connector contact portion characteristic measuring device is divided into a second tube portion that accommodates a connection portion with a second end portion of a certain inner conductor for measurement. The electrical property of the said contact part is measured using the contact part property measuring device of any one of Claims 1-3.
A method for measuring contact portion characteristics of a coaxial connector.

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