JP4868462B2 - connector - Google Patents

Description

  The present invention relates to a connector, and more particularly to a connector having a coaxial structure.

  Conventionally, a coaxial connector including a signal contact, a ground shell, and an insulator is known (see Patent Document 1 below).

  The signal contact (center conductor) has a substantially cylindrical shape and has a soldering connection portion connected to the center conductor of the coaxial cable. The soldering connection part has a semi-cylindrical shape and is located at one end of the signal contact.

  When the central conductor of the coaxial cable is inserted into the soldered connection portion of the signal contact, the radial half of the central conductor of the coaxial cable is exposed.

  The ground shell is substantially cylindrical and accommodates signal contacts.

  The insulator is interposed between the signal contact and the ground shell and holds the signal contact.

  To solder the center conductor of the coaxial cable to the signal contact of the connector, insert one end of the center conductor of the coaxial cable into the soldering connection part of the signal contact, melt the solder, Is joined to the soldering connection portion of the signal contact.

At this time, since it is required that the bonding strength between the central conductor of the coaxial cable and the soldered connection portion of the signal contact be equal to or higher than a predetermined level, at least an amount of solder that covers at least the exposed portion of the central conductor of the coaxial cable. Will be served.
Japanese Utility Model Publication No.59-99378

  Matching of characteristic impedance is important in the connection between a coaxial cable and a coaxial connector used for high-frequency transmission, but the distance between the exposed surface of the solder on the center conductor and the ground shell is important in determining the characteristic impedance. Is a factor.

  In the above coaxial connector, when the central conductor of the coaxial cable is inserted into the soldered connection portion of the signal contact, half of the radial direction of the central conductor of the coaxial cable is exposed. An amount of solder that covers at least the exposed portion of the central conductor of the coaxial cable is required, which causes a variation in the amount of solder used during the operation of connecting the coaxial cable and the coaxial connector.

  If the amount of solder used varies, the distance between the exposed surface of the solder deposited on the central conductor and the ground shell changes accordingly, and the amount of change in characteristic impedance also increases.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a coaxial connector that can reduce the amount of change in characteristic impedance due to variation in the amount of solder in a soldering connection portion.

In order to solve the above-mentioned problem, the connector of the invention of claim 1 is a signal contact comprising an insulator, a soldering connection portion soldered to the central conductor of the coaxial cable, and a holding portion held by the insulator. And a connector including a ground shell that surrounds the insulator and the signal contact, the solder connection portion is bent in a substantially U shape so as to accommodate the central conductor of the coaxial cable, The depth of the soldering connection portion is equal to and constant with the outer diameter of the central conductor of the coaxial cable to be accommodated, and the exposed surface of the solder exposed at the opening surface of the soldering connection portion and the ground shell The distance between the inner peripheral surface is longer than the distance between the outer peripheral surface of the soldering connection portion and the inner peripheral surface of the ground shell.

  As described above, the soldering connection portion is bent in a substantially U shape so as to accommodate the central conductor of the coaxial cable, and the soldering connection portion has a depth of the central conductor of the coaxial cable to be accommodated. Since it is larger than the outer diameter, the central conductor is accommodated in the soldering connection part, and when soldering, the solder can be confined in the soldering connection part and soldered. The solder spreads over the entire circumference of the central conductor of the coaxial cable, and a predetermined bonding strength can be ensured. Therefore, variations in the amount of solder used are less likely to occur, and the amount of change in characteristic impedance is reduced.

According to a second aspect of the present invention, in the connector according to the first aspect, when the center conductor is accommodated in the soldering connection portion and soldered, the center of the center conductor is positioned at the center of the ground shell. Further, the soldering connection portion is disposed in the ground shell.

According to a third aspect of the present invention, in the connector according to the first aspect, when the center conductor is accommodated in the soldering connection portion and soldered, the center of the center conductor is more than the center of the ground shell. The soldering connection portion is disposed in the ground shell so as to be displaced in a direction opposite to the opening surface of the connection portion .

According to a fourth aspect of the present invention, in the connector according to any one of the first to third aspects, a notch is formed in a portion of the ground shell that faces the opening surface of the soldering connection portion in the radial direction. It is characterized by that.
According to a fifth aspect of the present invention, in the connector according to any one of the first to fourth aspects, the opening surface of the soldering connection portion and the opening surface of the soldering connection portion of the ground shell are opposed in the radial direction. An air layer is formed between the insulating shell and the insulator, the three surfaces excluding the opening surface of the soldering connection portion, and the inner peripheral surface of the ground shell that is radially opposed to the three surfaces. And a dielectric layer is formed between the first and second electrodes.

  According to the present invention, it is possible to reduce the amount of change in characteristic impedance due to variation in the amount of solder in the soldering connection portion.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 is a longitudinal sectional view of a coaxial connector according to a first embodiment of the present invention, FIG. 2 is a perspective view showing an appearance of the coaxial connector shown in FIG. 1, and FIG. 3 is a sectional view taken along line III-III in FIG. 4 is a perspective view showing a cross section of the coaxial connector shown in FIG.

  As shown in FIGS. 1 and 2, the coaxial connector (connector) 1 includes an insulator 3, a signal contact 5, and a ground shell 7.

  The coaxial connector 1 is connected to a coaxial cable 20. In FIG. 1, the coaxial cable 20 is cut at one end, and a cross-sectional view thereof is drawn. The coaxial cable 20 includes a center conductor 21, an insulator 22, an outer conductor 23, and a coating 24.

  The insulator 3 is made of an insulating resin and has a substantially cylindrical shape. The insulator 3 is formed so as to wrap a holding portion 52 of a signal contact 5 described later by a so-called mold-in molding method. The insulator 3 is fixed in the ground shell 7.

  The signal contact 5 includes a soldering connection part 51, a holding part 52, a pair of spring parts 53, and a pair of contact parts 54.

  As shown in FIGS. 3 and 4, the soldering connection portion 51 is bent in a substantially U shape and can accommodate the central conductor 21. The depth of the soldering connection portion 51 is substantially the same as the diameter of the central conductor 21 of the coaxial cable 20, and the width of the soldering connection portion 51 (distance between the opposite inner surfaces of the soldering connection portion 51). Is slightly larger than the diameter of the central conductor 21 of the coaxial cable 20. The central conductor 21 accommodated in the soldering connection part 51 is connected by solder S.

  The holding part 52 is coupled to the soldering connection part 51. The holding part 52 is embedded and held in the insulator 3.

  The pair of spring portions 53 are coupled to the holding portion 52 and face each other in the radial direction of the ground shell 7.

  The pair of contact portions 54 are respectively coupled to the spring portion 53. When the coaxial connector 1 is connected to a counterpart coaxial connector (not shown), the pair of contact portions 54 sandwich the pin contact of the counterpart coaxial connector and press against the pin contacts by the spring force of the pair of spring portions 53, respectively. It is done.

  The ground shell 7 has a substantially cylindrical shape and surrounds the insulator 3 and the signal contact 5. Here, the center of the ground shell 7 and the center of the center conductor 21 soldered to the soldering connection portion 51 are made to coincide with each other.

  To connect the coaxial cable 20 to the coaxial connector 1, first, the central conductor 21 and the outer conductor 23 at one end of the coaxial cable 20 are exposed.

  Next, a metal ring 25 is disposed between the exposed outer conductor 23 and the insulator 22.

  Thereafter, the central conductor 21 of the coaxial cable 20 is accommodated in the soldering connection portion 51 of the signal contact 5 integrated with the insulator 3 and soldered.

  Next, as shown in FIG. 1, the insulator 3, the signal contact 5, the ring 25, the outer conductor 23 around it, and one end of the coaxial cable 20 are inserted into the ground shell 7.

  Finally, as shown in FIG. 2, the portion adjacent to the ring 25 of the ground shell 7 is caulked into a hexagonal column shape. Thereby, the coaxial cable 20 is fixed to the ground shell 7.

  The value of the characteristic impedance is determined by the distance between the outer peripheral surface of the signal transmission path (the central conductor 21, the solder S, and the soldering connection portion 51) and the inner peripheral surface of the ground (ground shell 7). Further, the degree of influence on the value of the characteristic impedance is such that the distance between the outer peripheral surface of the signal transmission path (the central conductor 21, the solder S, and the soldering connection portion 51) and the inner peripheral surface of the ground (ground shell 7) is short. It is so big and far away is small.

  One of the major problems in impedance matching is the soldering operation between the soldering connection part 51 and the central conductor 21. This is because the soldering work is performed manually, and it is difficult to keep the amount of solder used constant. Therefore, the distance between the solder (signal transmission path) and the ground shell (ground) depends on the soldering work. This is because impedance matching becomes difficult.

  In this embodiment, since the depth of the soldering connection portion 51 is equal to the outer diameter of the center conductor 21 of the coaxial cable 20, the center conductor 21 is accommodated in the soldering connection portion 51 and soldered. As shown in FIG. 3, the solder S can be confined in the soldering connection portion 51 and the exposed surface of the solder S can be soldered with the opening surface 51 a of the soldering connection portion 51 being substantially flush with the opening. Therefore, variation in the distance between the exposed surface of the solder S and the inner peripheral surface of the ground shell 7 can be suppressed, and the amount of change in characteristic impedance due to variation in the amount of solder S used can be reduced. Further, in this embodiment, the soldering connection portion 51 is disposed in the ground shell 7 so that the center of the soldered central conductor 21 is located at the center of the ground shell 7. Has been.

The distance between the distance D2 outer peripheral surface of the connection for the soldering portion 51 and the inner peripheral surface of the ground shell 7 between the exposed surface and the inner peripheral surface of the ground shell 7 of the solder S in the opening surface of soldering for connecting portion 51 Since it is larger than D1, the influence on the characteristic impedance on the exposed surface of the solder S is small, and even if there is some variation in the amount of solder on the exposed surface, the characteristic impedance does not change greatly. Therefore, the amount of change in characteristic impedance due to variations in the amount of solder S used is reduced.

  In addition, the depth of the soldering connection portion 51 is equal to the outer diameter of the central conductor 21 of the coaxial cable 20, and the three sides of the central conductor 21 are surrounded by the soldering connection portion 51, so that a relatively small amount is obtained. A high bonding strength can be ensured by the solder S. Therefore, it can be expected to prevent variations in the amount of solder S used.

  As described above, according to this embodiment, the amount of change in characteristic impedance due to variation in the amount of solder S used can be reduced.

  FIG. 5 is a cross-sectional view of a modification of the coaxial connector shown in FIG.

  Portions common to the first embodiment are denoted by the same reference numerals and description thereof is omitted. Only the main differences from the first embodiment will be described below.

  The cross-sectional shape of the ground shell 7 of the coaxial connector 1 of the first embodiment is circular, but the cross-sectional shape of the ground shell 107 of the coaxial connector 101 according to this modification is substantially square.

  According to this modification, the same effects as those of the first embodiment can be obtained.

  As another modification of the first embodiment, the ground shell 7 (107) is formed with a plurality of slits (not shown) extending in the circumferential direction at equal intervals (not shown), or a plurality of elongated plates. A ground shell (not shown) surrounding the four sides of the central conductor 21 can be considered.

  FIG. 6 is a cross-sectional view of a coaxial connector according to a second embodiment of the present invention.

  Portions common to the first embodiment are denoted by the same reference numerals and description thereof is omitted. Only the main differences from the first embodiment will be described below.

  In the coaxial connector 201 according to the second embodiment, as shown in FIG. 6, the opening surface 251 a of the solder connection part 251 of the signal contact 205 is arranged in the radial direction (the diameter of the ground shell 7). In the direction). For this reason, in the coaxial connector 1 according to the first embodiment, the center point of the center conductor 21 soldered to the soldering connection portion 51 of the signal contact 5 and the center point of the ground shell 7 coincide with each other. In the coaxial connector 201 according to the second embodiment, the center point 21 s of the center conductor 21 soldered to the soldering connection portion 251 is located below the center point 7 s of the ground shell 7 (the opening surface of the soldering connection portion 251). 251a and the opposite side surface).

  According to the second embodiment, the same operational effects as the first embodiment can be obtained, and the distance between the solder S exposed at the opening surface 251a and the ground shell 7 is wider than that of the coaxial connector 1 according to the first embodiment. The amount of change in characteristic impedance due to variation in the amount of solder S used can be further reduced.

  FIG. 7 is a cross-sectional view of a coaxial connector according to a third embodiment of the present invention.

  Portions common to the first embodiment are denoted by the same reference numerals and description thereof is omitted. Only the main differences from the first embodiment will be described below.

  In the coaxial connector 1 according to the first embodiment, the depth of the soldering connection portion 51 of the signal contact 5 is substantially equal to the outer diameter of the center conductor 21 of the coaxial cable 20, but the coaxial connector 301 according to the third embodiment. Then, as shown in FIG. 7, the depth of the soldering connection portion 351 of the signal contact 305 is made larger than the outer diameter of the center conductor 21 of the coaxial cable 20.

  According to the third embodiment, the same effects as those of the first embodiment can be obtained, and the portion facing the opening surface 351a of the ground shell 7 in the radial direction (the radial direction of the ground shell 7) and the soldering connection portion 351 Therefore, the amount of change in characteristic impedance due to variation in the amount of solder S used can be further reduced.

  FIG. 8 is a cross-sectional view of a coaxial connector according to a fourth embodiment of the present invention.

  Portions common to the first embodiment are denoted by the same reference numerals and description thereof is omitted. Only the main differences from the first embodiment will be described below.

  As shown in FIG. 8, the fourth embodiment is a combination of the second embodiment and the third embodiment. That is, the opening surface 451a of the soldering connection portion 451 of the signal contact 405 of the coaxial connector 401 is separated from the portion facing the opening surface 451a of the ground shell 7 in the radial direction (the radial direction of the ground shell 7). For this reason, similarly to the coaxial connector 201 according to the second embodiment, the center point 21s of the center conductor 21 soldered to the soldering connection portion 451 and the center point 7s of the ground shell 7 are shifted. Further, the depth of the soldering connection portion 451 of the signal contact 405 is made deeper in the same way as the soldering connection portion 351 of the coaxial connector 301 according to the third embodiment.

  According to the fourth embodiment, the same effects as those of the first embodiment can be obtained, and the amount of change in characteristic impedance due to variation in the amount of solder S used can be further reduced.

  FIG. 9 is a cross-sectional view of a coaxial connector according to a fifth embodiment of the present invention.

  Portions common to the first embodiment are denoted by the same reference numerals and description thereof is omitted. Only the main differences from the first embodiment will be described below.

  As shown in FIG. 9, the coaxial connector 501 according to the fifth embodiment opposes the opening surface 51a of the soldering connection portion 51 of the signal contact 5 of the ground shell 507 in the radial direction (the radial direction of the ground shell 507). A slit 571 is formed in the portion.

  According to the fifth embodiment, the same operational effects as in the first embodiment can be obtained, and the same operational effects can be obtained as the distance between the solder S and the ground shell 507 is widened by the slit 571. The amount of change in characteristic impedance due to the variation in the amount can be further reduced.

  FIG. 10 is a cross-sectional view of a coaxial connector according to a sixth embodiment of the present invention.

  Portions common to the first embodiment are denoted by the same reference numerals and description thereof is omitted. Only the main differences from the first embodiment will be described below.

  As shown in FIG. 10, the insulator 603 of the coaxial connector 601 according to the sixth embodiment includes a dielectric part (dielectric layer) 631. The dielectric portion 631 includes three surfaces excluding the opening surface 51 a of the soldering connection portion 51 of the signal contact 5, and the inner peripheral surface of the ground shell 7 that faces the three surfaces in the radial direction of the central conductor 21. And three sides of the soldering connection part 51 are enclosed.

  An air layer A is formed between the opening surface 51a of the soldering connection portion 51 and the opening surface 51a of the ground shell 7 and a portion facing in the radial direction (the radial direction of the ground shell 7).

  According to the sixth embodiment, the same effects as those of the first embodiment are achieved, and an air layer A is formed between the opening surface 51 a and the inner peripheral surface of the ground shell 7. Since the three sides other than the opening surface 51a are surrounded by the dielectric portion 631, the relationship between the distance between the solder S and the ground shell 7 and the value of the characteristic impedance is weakened, and the characteristic impedance due to variations in the amount of use of the solder S is reduced. The amount of change can be further reduced.

  FIG. 11 is a cross-sectional view of a coaxial connector according to a seventh embodiment of the present invention.

  Portions common to the first embodiment are denoted by the same reference numerals and description thereof is omitted. Only the main differences from the first embodiment will be described below.

  As shown in FIG. 11, the seventh embodiment is a combination of the third embodiment and the fifth embodiment. That is, the depth of the soldering connection portion 751 of the signal contact 705 of the coaxial connector 701 is made larger than the outer diameter of the center conductor 21 like the soldering connection portion 351 of the coaxial connector 301 according to the third embodiment, Further, a slit 771 is formed in the ground shell 707 of the coaxial connector 701 in the same manner as the ground shell 507 of the coaxial connector 501 according to the fifth embodiment.

The slit 771 faces the opening surface 751a of the soldering connection portion 751 in the radial direction (the radial direction of the ground shell 707).

  According to the fourth embodiment, the same effects as those of the first embodiment can be obtained, and the amount of change in characteristic impedance due to variation in the amount of solder S used can be further reduced.

  FIG. 12 is a cross-sectional view of a coaxial connector according to an eighth embodiment of the present invention.

  Portions common to the first embodiment are denoted by the same reference numerals and description thereof is omitted. Only the main differences from the first embodiment will be described below.

  As shown in FIG. 12, the eighth embodiment is a combination of the third embodiment and the sixth embodiment. That is, the depth of the soldering connection portion 851 of the signal contact 805 of the coaxial connector 801 is made larger than the outer diameter of the center conductor 21 like the soldering connection portion 351 of the coaxial connector 301 according to the third embodiment, Further, a dielectric portion (dielectric layer) 831 was formed in the insulator 803 of the coaxial connector 801 in the same manner as the insulator 603 of the coaxial connector 601 according to the sixth embodiment.

  According to the eighth embodiment, the same effects as those of the first embodiment can be obtained, and the amount of change in characteristic impedance due to variation in the amount of solder S used can be further reduced.

  Experiments were performed to confirm the effects of the first, second, third, fifth, and sixth embodiments. By adjusting only the width of the soldering connection part of the coaxial connector according to the first, second, third, fifth, and sixth embodiments, the value of the characteristic impedance of the coaxial connector according to each embodiment was adjusted to 50Ω. . Hereinafter, experimental results will be described.

  FIG. 13A shows a usage state of the coaxial connector according to the first embodiment, a cross-sectional view of the coaxial connector when soldering is performed with a reduced amount of solder used, and FIG. 13B shows a usage state of the coaxial connector. FIG. 3 is a cross-sectional view of a coaxial connector when soldering is performed with an increased amount of solder used.

  As shown in FIG. 13A, the value of the characteristic impedance when the center conductor 21 was soldered to the soldering connection portion 51 using a certain amount of solder was 50.16Ω.

  As shown in FIG. 13B, the characteristic impedance when the center conductor 21 is soldered to the soldering connection portion 51 using a predetermined amount of solder more than that in FIG. 13A was 49.24Ω. The characteristic impedance was reduced by 0.92Ω by increasing the amount of solder used. The amount of increase in the amount of solder used is common in the first, second, third, fifth and sixth embodiments.

  FIG. 14A shows a usage state of the coaxial connector according to the second embodiment, a cross-sectional view of the coaxial connector when soldering is performed with a reduced amount of solder used, and FIG. 14B shows a usage state of the coaxial connector. FIG. 3 is a cross-sectional view of a coaxial connector when soldering is performed with an increased amount of solder used.

  As shown in FIG. 14A, the value of the characteristic impedance when the center conductor 21 was soldered to the soldering connection portion 51 by using a certain amount of solder was 50.07Ω.

  As shown in FIG. 14B, the characteristic impedance when the center conductor 21 is soldered to the soldering connection portion 51 using a predetermined amount of solder more than the solder in FIG. 14A was 49.26Ω. The characteristic impedance was reduced by 0.81Ω as the amount of solder used increased.

  FIG. 15A shows a usage state of the coaxial connector according to the third embodiment, a cross-sectional view of the coaxial connector when soldering is performed while reducing the amount of solder used, and FIG. 15B shows a usage state of the coaxial connector. FIG. 3 is a cross-sectional view of a coaxial connector when soldering is performed with an increased amount of solder used.

  As shown in FIG. 15A, the value of the characteristic impedance when the center conductor 21 was soldered to the soldering connection portion 51 using a certain amount of solder was 50.06Ω.

  As shown in FIG. 15B, the characteristic impedance value when the center conductor 21 is soldered to the soldering connection portion 51 using a predetermined amount of solder more than the solder in FIG. 15A was 49.51Ω. The characteristic impedance was reduced by 0.55Ω as the amount of solder used increased.

  FIG. 16A shows a usage state of the coaxial connector according to the fifth embodiment, a cross-sectional view of the coaxial connector when soldering is performed with a reduced amount of solder used, and FIG. 16B shows a usage state of the coaxial connector. FIG. 3 is a cross-sectional view of a coaxial connector when soldering is performed with an increased amount of solder used.

  As shown in FIG. 16A, the characteristic impedance value when the center conductor 21 was soldered to the soldering connection portion 51 by using a certain amount of solder was 50.09Ω.

  As shown in FIG. 16B, the value of the characteristic impedance when the center conductor 21 is soldered to the soldering connection portion 51 using a predetermined amount of solder more than the solder in the case of FIG. 16A was 49.23Ω. The characteristic impedance was reduced by 0.86Ω as the amount of solder used increased.

  FIG. 17A shows a usage state of the coaxial connector according to the sixth embodiment, a cross-sectional view of the coaxial connector when soldering is performed with a reduced amount of solder used, and FIG. 17B shows a usage state of the coaxial connector. FIG. 3 is a cross-sectional view of a coaxial connector when soldering is performed with an increased amount of solder used.

  As shown in FIG. 17A, the value of the characteristic impedance when the center conductor 21 was soldered to the soldering connection portion 51 using a certain amount of solder was 50.12Ω.

  As shown in FIG. 17B, the value of the characteristic impedance when the center conductor 21 is soldered to the soldering connection portion 51 using a predetermined amount of solder more than the solder in the case of FIG. 17A was 49.61Ω. The characteristic impedance was reduced by 0.51Ω by increasing the amount of solder used.

  As is apparent from the above experimental results, the change in characteristic impedance due to the change in the amount of solder used was the smallest in the sixth embodiment shown in FIGS. 17A and 17B.

  In the above-described embodiment, the socket type signal contact is used. However, the signal contact is not limited to the socket type, and a pin type signal contact may be used.

FIG. 1 is a longitudinal sectional view of a coaxial connector according to a first embodiment of the present invention. FIG. 2 is a perspective view showing an appearance of the coaxial connector shown in FIG. FIG. 3 is a sectional view taken along line III-III in FIG. 4 is a perspective view showing a cross section of the coaxial connector shown in FIG. FIG. 5 is a cross-sectional view of a modification of the coaxial connector shown in FIG. FIG. 6 is a cross-sectional view of a coaxial connector according to a second embodiment of the present invention. FIG. 7 is a cross-sectional view of a coaxial connector according to a third embodiment of the present invention. FIG. 8 is a cross-sectional view of a coaxial connector according to a fourth embodiment of the present invention. FIG. 9 is a cross-sectional view of a coaxial connector according to a fifth embodiment of the present invention. FIG. 10 is a cross-sectional view of a coaxial connector according to a sixth embodiment of the present invention. FIG. 11 is a cross-sectional view of a coaxial connector according to a seventh embodiment of the present invention. FIG. 12 is a cross-sectional view of a coaxial connector according to an eighth embodiment of the present invention. FIG. 13A shows a usage state of the coaxial connector according to the first embodiment, and is a cross-sectional view of the coaxial connector when soldering is performed while reducing the amount of solder used. FIG. 13B shows a state of use of the coaxial connector, and is a cross-sectional view of the coaxial connector when soldering is performed with an increased amount of solder used. FIG. 14A is a cross-sectional view of the coaxial connector when the coaxial connector according to the second embodiment is used and soldering is performed while reducing the amount of solder used. FIG. 14B shows a state of use of the coaxial connector, and is a cross-sectional view of the coaxial connector when soldering is performed with an increased amount of solder used. FIG. 15A shows a usage state of the coaxial connector according to the third embodiment, and is a cross-sectional view of the coaxial connector when soldering is performed while reducing the amount of solder used. FIG. 15B shows a state of use of the coaxial connector, and is a cross-sectional view of the coaxial connector when soldering is performed with an increased amount of solder used. FIG. 16A shows a usage state of the coaxial connector according to the fifth embodiment, and is a cross-sectional view of the coaxial connector when soldering is performed while reducing the amount of solder used. FIG. 16B shows a state of use of the coaxial connector, and is a cross-sectional view of the coaxial connector when soldering is performed with an increased amount of solder used. FIG. 17A is a cross-sectional view of the coaxial connector when the coaxial connector according to the sixth embodiment is used and soldering is performed with a reduced amount of solder used. FIG. 17B shows a state of use of the coaxial connector, and is a cross-sectional view of the coaxial connector when soldering is performed with an increased amount of solder used.

Explanation of symbols

1,201,301,401,501,601,701,801 Coaxial connector (connector)
3,603,803 Insulator 631,831 Dielectric part (dielectric layer)
5,205,305,405,705,805 Signal contact 51,251,351,451,751,851 Connection part 51a, 251a, 351a, 451a, 751a, 851a Opening surface 52 Holding part 7,107,507 707 Ground shell 20 Coaxial cable 21 Center conductor

Claims (5)

An insulator,
A signal contact having a soldering connection portion soldered to the central conductor of the coaxial cable, and a holding portion held by the insulator;
In the connector comprising the insulator and a ground shell surrounding the signal contact,
The soldering connection part is bent in a substantially U shape so as to accommodate the central conductor of the coaxial cable,
The depth of the soldering connection portion is equal to and constant with the outer diameter of the central conductor of the coaxial cable to be accommodated,
The distance between the exposed surface of the solder exposed at the opening surface of the soldering connection portion and the inner peripheral surface of the ground shell is the distance between the outer peripheral surface of the soldering connection portion and the inner peripheral surface of the ground shell. Connector characterized by being longer than the distance between. The solder connection portion is disposed in the ground shell so that the center conductor is located at the center of the ground shell when the center conductor is accommodated in the solder connection portion and soldered. The connector according to claim 1, wherein the connector is formed. When the center conductor is accommodated in the soldering connection portion and soldered, the center of the center conductor is shifted in the direction opposite to the opening surface of the solder connection portion from the center of the ground shell. The connector according to claim 1, wherein the soldering connection portion is disposed in the ground shell. The connector according to any one of claims 1 to 3, wherein a notch is formed in a portion of the ground shell that faces the opening surface of the soldering connection portion in a radial direction.   An air layer is formed between an opening surface of the soldering connection portion and a portion of the ground shell facing the opening surface of the soldering connection portion in a radial direction,
  The insulator is accommodated between three surfaces excluding the opening surface of the soldering connection portion and a part of the inner peripheral surface of the ground shell that is radially opposed to the three surfaces. 5. The connector according to claim 1, wherein a layer is formed.

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