JP2003178844A - Coaxial connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coaxial connector of a surface mounting type wherein it can prevent that a center conductor pin damages a circuit pattern in loading and connection with the circuit pattern can be made stably and flexibly. <P>SOLUTION: This connector is provided with the first outer conductor 1 in nearly cylindrical state fixed to and connected with a circuit board 10 by soldering and the center conductor pin 5 wherein the center part is retained by an insulator 2 which is arranged at the first outer conductor 1 and in which the second outer conductor 3 is formed at the outer periphery. The center conductor pin 5 has elasticity in a direction perpendicular to the circuit board 10, and a spherically rotating structural body 7 having electroconductivity is installed at the tip of the circuit board 10 side, and this is constituted so that the spherically rotating structural body 7 is contacted and connected with the circuit pattern 12 of the circuit board 10 when loaded to the circuit board 10. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface mount type coaxial connector which is mounted on a surface of a printed circuit board or the like to transmit signals, and more specifically, a center conductor pin is provided on the surface of the printed circuit board or the like. The present invention relates to a structure for connecting to a formed circuit pattern.

[0002]

2. Description of the Related Art FIG. 9 is a sectional view showing the structure of a conventional surface mount type coaxial connector which is mounted on the surface of a printed circuit board on which electronic circuits and the like are formed. In the figure, 1 is a substantially cylindrical first outer conductor that serves as a connector body, 2 is an insulator, 3 is a cylindrical second outer conductor formed on the outer periphery of the insulator 2, and 5 is an insulator 2. A central conductor pin that holds the central portion, 10 is a printed circuit board, 11 is a circuit pattern to which the first outer conductor 1 is soldered, and 12 is a circuit pattern to which the central conductor pin 5 is soldered. Is solder. The first outer conductor 1, the insulator 2, the second outer conductor 3, and the center conductor pin 5 have an integral structure, and form a coaxial connector. Although not shown in FIG. 9, there is a mating coaxial connector mounted on another printed circuit board or electronic device, and the mating coaxial connector and the coaxial connector shown in FIG. 9 are fitted together. By doing so, the signal is transmitted between the coaxial connectors.

Next, a case where the conventional surface mount type coaxial connector having the structure shown in FIG. 9 is mounted on the printed circuit board 10 will be described. Solder paste is applied in advance on the surfaces of the circuit pattern 11 to which the first outer conductor 1 is connected and the circuit pattern 12 to which the central conductor pin 5 is connected. Then, the first outer conductor 1 is aligned with the circuit pattern 11 and the center conductor pin 5 is aligned with the circuit pattern 12 and heated in a state of being pressed, and the solder paste is melted and then cooled. The outer conductor 1 and the circuit pattern 11 are soldered and the center conductor pin 5 and the circuit pattern 12 are soldered. By such soldering work (so-called reflow soldering work), the conventional coaxial connector is fixedly connected to the printed circuit board. Incidentally, the fixed connection of the coaxial connector to the printed circuit board may be contacted by other fixed connection means such as screwing instead of solder connection.

[0004]

As described above, in the conventional surface mount type coaxial connector, the center conductor pin is connected to the circuit pattern on the surface of the printed circuit board by soldering, so that the solder (solder) is used. There is a problem in that the transfer characteristics of the high-frequency signal to be transmitted vary due to changes (variations) in the amount and shape. Further, when the coaxial connector is aligned with the printed circuit board, the tip of the center conductor pin is moved in the horizontal direction (that is, in the direction parallel to the printed circuit board) while being in contact with the circuit pattern. Therefore, the surface of the circuit pattern connected by the tip of the center conductor pin is scratched, the transfer characteristics of the transmitted high-frequency signal fluctuates, or the stable connection between the center conductor pin and the circuit pattern cannot be maintained, or There is a problem that the reliability of the circuit pattern of the circuit board cannot be ensured due to corrosion of the scratched portion.

Further, in the conventional coaxial connector, since the center conductor pin is fixedly connected to the circuit pattern by soldering, it does not have a function of absorbing the positional deviation. Therefore, the counterpart coaxial connector is accurate with respect to the center conductor pin. Had to be aligned and inserted (fitted). Otherwise, there is a problem that the mating coaxial connector cannot be fitted, or if the mating is forcibly fitted, stress concentration occurs in the connector mounting portion.

The present invention has been made in order to solve such a problem. When mounting a surface mount type coaxial connector on a printed circuit board, the center conductor pin damages the circuit pattern on the board surface. It is an object of the present invention to provide a surface-mounting-type coaxial connector that can prevent the above-mentioned problem and can stably and flexibly connect the center conductor pin to the circuit pattern. Also, by providing a center conductor pin moving mechanism (position adjustment mechanism) that can absorb the misalignment of the mating coaxial connector, it is not necessary to perform highly accurate alignment with the mating coaxial connector, and the mating connector can be easily mated. An object of the present invention is to provide a coaxial connector that can be fitted with the coaxial connector of.

[0007]

SUMMARY OF THE INVENTION A coaxial connector according to the present invention includes a substantially cylindrical first outer conductor fixedly connected to a circuit board by soldering, and a first outer conductor which is disposed inside and has an outer periphery. In a coaxial connector having a central conductor pin whose central portion is held by an insulator having a second outer conductor formed therein, the central conductor pin has elasticity and is electrically conductive to a tip on the circuit board side. A spherical rotating structure having properties is provided, and when mounted on a circuit board, the spherical rotating structure is configured to make contact with the circuit pattern of the circuit board.

Further, the first outer conductor of the coaxial connector according to the present invention is fixedly connected to the circuit board by screwing.

Further, the coaxial connector according to the present invention is provided with a central conductor pin position adjusting mechanism for freely moving the central conductor pin in a direction parallel to the circuit board.

Further, the center conductor pin position adjusting mechanism of the coaxial connector according to the present invention has a first protruding portion formed in a shelf shape on the inner peripheral surface of the first outer conductor, and a first outer conductor. Second projecting portion formed in a shelf shape on the inner peripheral surface near the end portion on the circuit board side, and a third projecting portion formed in a shelf shape on the outer peripheral surface of the second outer conductor. And a first protrusion of the first outer conductor and a third protrusion of the second outer conductor.
A first spring is arranged between the first outer conductor and the second outer conductor so that the end of the second outer conductor on the circuit board side is brought into contact with the second outer conductor. The second projecting portion movably supports the second outer conductor.

Further, the center conductor pin of the coaxial connector according to the present invention has a first center conductor pin having a central portion held by an insulator and a spherical rotating structure provided at the tip on the circuit board side, and the center conductor pin of the circuit board. A second one in which one end is fixedly connected to the circuit pattern and the other end is in contact connection with the spherical rotating structure.
And a central conductor pin of.

The spherical rotary structure of the coaxial connector according to the present invention is provided at the tip of the second center conductor pin.

The coaxial connector according to the present invention has a second structure.
A second spring between the end surface of the outer conductor on the side of the circuit board and the second protruding portion formed in a shelf shape on the inner peripheral surface of the first outer conductor near the end of the circuit board. Is further arranged.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. Incidentally, the same reference numerals as those used in the related art represent the same or corresponding elements as those used in the related art. Embodiment 1. FIG. 1 is a sectional view showing the structure of a surface mount type coaxial connector according to a first embodiment. In the figure, 1 is a substantially cylindrical first outer conductor that serves as a connector body, 2 is an insulator, 3 is a cylindrical second outer conductor formed on the outer periphery of the insulator 2, and 5 is an insulator 2. A central conductor pin holding the central portion, 7 a spherical rotating structure having conductivity provided at the tip of the central conductor pin 5, 10 a printed circuit board (also simply referred to as a circuit board), 11 a first Is a circuit pattern to which the outer conductor 1 is solder-connected, 12 is a circuit pattern to which the spherical rotating structure 7 provided at the tip of the central conductor pin 5 is connected, and 13 is solder. As a structure for attaching the spherical rotating structure 7 to the tip of the central conductor pin 5, for example, a structure similar to the structure of the tip of a ballpoint pen or the structure of a mechanical computer mouse is adopted.

A central conductor pin 5 provided with a first outer conductor 1, an insulator 2, a second outer conductor 3 and a spherical rotating structure 7.
Has an integral structure, and constitutes the coaxial connector according to the first embodiment. The center conductor pin 5 has elasticity and can be deformed in a direction perpendicular to the printed circuit board 10. 2 is a cross-sectional view showing a structural example of a mating coaxial connector that is fitted with the coaxial connector according to the first embodiment shown in FIG. In the figure, 31 is an outer conductor, 3
Reference numeral 2 is an insulator, and 33 is a central conductor pin, which are integrally configured to form a counterpart coaxial connector. Further, 40 is a printed circuit board on which the counterpart coaxial connector is mounted, 41 is a circuit pattern of the printed circuit board 40 to which the outer conductor 31 is soldered, and 12 is the center conductor pin 3.
3 is a circuit pattern of the printed circuit board 40 to be soldered.

The center conductor pin 33 of the mating coaxial connector
The tip end of is inserted (fitted) into the end of the center conductor pin 5 of the coaxial connector according to the present embodiment shown in FIG. It has a structure. As described in the related art, also in the mating coaxial connector, the surface of the circuit pattern 41 to which the outer conductor 31 is connected and the circuit pattern 42 to which the central conductor pin 33 is connected are previously coated with solder paste. . Then, the outer conductor 31 is connected to the circuit pattern 41.
In addition, the center conductor pin 33 is aligned with the circuit pattern 42 and heated in a state of being pressed, and the solder paste is melted and then cooled, so that the outer conductor 31 and the circuit pattern 41, and the center conductor pin 33 and the path pattern. 42
By making the solder connection, the mating coaxial connector is fixedly connected to the printed circuit board 40.

Although the outer conductor is not formed on the outer periphery of the insulator 32 in FIG. 2, it goes without saying that a structure in which a second outer conductor is formed on the outer periphery of the insulator 32 may be used. Further, FIG. 3 is a diagram showing a state when the counterpart coaxial connector shown in FIG. 2 is fitted to the coaxial connector according to the present embodiment shown in FIG.

Next, a case where the coaxial connector according to the first embodiment having the structure shown in FIG. 1 is mounted (mounted) on the printed circuit board 10 will be described. The surface of the circuit pattern 11 of the printed circuit board 10 to which the first outer conductor 1 is connected is previously coated with solder paste, but the spherical rotating structure 7 provided at the tip of the center conductor pin 5 contacts. No solder paste is applied to the surface of the circuit pattern 12 to be formed. Then, the first outer conductor 1 is heated to the circuit pattern 11 and the spherical rotating structure 7 provided at the tip of the center conductor pin 5 is aligned and pressed to the circuit pattern 12, respectively. The solder paste applied to the surface of 11 is melted and then cooled. As a result, the first outer conductor 1 and the circuit pattern 1
While the solder connection 1 is made, the conductive spherical rotating structure 7 provided at the tip of the center conductor pin 5 is elastically contacted and connected to the circuit pattern 12.

In the coaxial connector according to the first embodiment adopting such a structure, the central conductor pin 5 and the circuit board pattern 12 are not connected by soldering but by elastic contact through the spherical rotating structure 7. , The conventional solder shape difference (that is, the center conductor pin 5 and the circuit pattern 12
It is possible to eliminate the fluctuation of the high-frequency signal transfer characteristic due to the variation in the amount of solder and the shape when soldered to and. Further, since the spherical rotating structure 7 is provided at the tip of the elastic center conductor pin 5, the rotating structure 7 can be easily moved when the coaxial connector is aligned with the circuit patterns 11 and 12 on the printed circuit board 10. Since the surface of the circuit pattern 12 is smoothly rotated while surely contacting the surface of the circuit pattern 12, the tip of the center conductor pin 5 does not damage the surface of the circuit pattern 12 as in the conventional case, and the center conductor pin 5 is not damaged.
It is possible to realize a coaxial connector in which a stable and highly reliable connection can be obtained between the wiring pattern and the circuit pattern 12.

Embodiment 2. FIG. 4 is a sectional view showing the structure of the coaxial connector according to the second embodiment. In the figure, 14 is a screw hole provided at the bottom of the first outer conductor 1,
Reference numeral 15 is a hole provided in the printed circuit board 10, through which a screw passes, and 16 is a screw. In addition, the same reference numerals as those in FIG.
It represents the same as or equivalent to that of FIG. In the coaxial connector according to the first embodiment described above, the first outer conductor 1
Although the structure in which the printed circuit board 10 is mounted on the printed circuit board 10 by soldering the circuit pattern 11 of the printed circuit board 10 to the printed circuit board 10, the coaxial connector according to the present embodiment, as shown in FIG. At the bottom of the conductor 1, a shelf-like projecting portion is provided on the outer periphery of the conductor 1,
A plurality of screw holes 14 are provided in this protruding portion of the shelf shape, and a plurality of holes 15 are also provided in the printed circuit board 10 corresponding to the plurality of screw holes 14, respectively.
6, the first outer conductor 1 and the printed circuit board 10 are screwed and fixed to connect the first outer conductor 1 and the circuit pattern 11 of the printed circuit board 10.

As a result, even in the coaxial connector according to this embodiment, the center conductor pin 5 is elastically contacted with the circuit pattern 12 on the printed circuit board 10 in a stable state through the spherical rotating structure 7 having conductivity. Therefore, the same effects as those of the coaxial connector according to the first embodiment described above are obtained, and further, since the soldering work is unnecessary, workability can be improved.

Embodiment 3. FIG. 5 is a sectional view showing the structure of the coaxial connector according to the third embodiment. In the figure, 1a is a first protruding portion 1b formed by protruding in a shelf shape on the inner peripheral surface of the first outer conductor 1 having a substantially cylindrical shape.
Is a second projecting portion formed in a shelf-like manner at the inner peripheral portion of the first outer conductor 1 in the vicinity of the bottom portion (that is, in the vicinity of the end portion of the first outer conductor 1 on the printed circuit board side). . Also, 3
Is a second outer conductor having a cylindrical shape, and 3a is a third projecting portion provided so as to project in a shelf shape on the outer peripheral portion of the second outer conductor 3. Reference numeral 8 is a first spring (spring) arranged between the first protruding portion 1a of the first outer conductor 1 and the third protruding portion 3a of the second outer conductor 3. In addition, the same reference numerals as those in FIG. 1 showing the structure of the coaxial connector according to the first embodiment represent the same or equivalent parts to those in FIG.

As shown in FIG. 5, the bottom portion of the second outer conductor 3 (that is, the end portion of the second outer conductor on the printed circuit board side) which is integrally formed with the center conductor pin 5 and the insulator 2.
Are supported by the second protruding portion 1b formed on the inner peripheral portion of the first outer conductor 1 near the bottom portion thereof. As with the coaxial connector according to the first embodiment, the first outer conductor 1 is soldered to the circuit pattern 11 on the printed circuit board 10 by soldering 13.
The center conductor pin 5 is elastically connected to the circuit pattern 12 on the printed circuit board 10 via the spherical rotating structure 7 attached to the tip.

Next, the characteristic structure and operation of the coaxial connector according to the third embodiment will be described. The central portion of the center conductor pin 5 is held by the insulator 2, and the insulator 2
A substantially cylindrical second outer conductor 3 is formed on the outer periphery of the second outer conductor 3, and the second outer conductor 3, the insulator 2 and the center conductor pin 5 have an integrated structure. Then, the second outer conductor 3 which is integrally formed with the insulator 2 and the center conductor pin 5 has a bottom portion of the second outer conductor 3 which is formed by the action of the first spring 8 inside the first outer conductor 1. Is supported by the second projecting portion 1b of the first outer conductor 1 while maintaining elastic contact between the upper surface of the second projecting portion 1b of the first outer conductor 1 and the upper surface of the second projecting portion 1b of the first outer conductor 1. The structure is such that it can move freely in the parallel direction.

In the coaxial connector according to the present embodiment which employs such a structure (that is, the central conductor pin position adjusting mechanism), the position of the mating coaxial connector when the mating coaxial connector is fitted is the printed circuit board. The second outer conductor 3 and the insulator 2 are slightly displaced even in the direction parallel to the substrate surface of 10.
The central conductor pin 5 and the central conductor pin 5 can move together in a direction parallel to the surface of the printed circuit board 10, and can be easily fitted to the mating coaxial connector. In addition, the center conductor pin 5 is attached to the printed circuit board 1 at the time of fitting.
When moving in a direction parallel to the substrate surface of 0, since the spherical rotating structure 7 having conductivity is provided at the tip of the central conductor pin 5 having elasticity, the circuit pattern 12 on the printed circuit board 10 is provided. The center conductor pin 5 can move in a direction parallel to the board surface of the printed circuit board 10 while maintaining stable contact without damaging the surface of the board. Further, even if the second outer conductor 3 moves in a direction parallel to the substrate surface of the printed circuit board 10, the first outer conductor 1 and the second outer conductor 3
Since elastic contact is always maintained, stable and reliable connection without fluctuation in transfer characteristics of high frequency signals is possible.

Fourth Embodiment FIG. 6 is a sectional view showing the structure of the coaxial connector according to the fourth embodiment. In the figure, reference numeral 1a denotes a first protruding portion provided in a shelf shape on the inner peripheral surface of the first outer conductor 1 having a substantially cylindrical shape, and 1b denotes an inner peripheral portion in the vicinity of the bottom portion of the first outer conductor 1. Is a second projecting portion provided so as to project in a shelf shape. Further, 3 is a substantially cylindrical second outer conductor, and 3a is a third projecting portion provided so as to project in a shelf shape on the outer peripheral portion of the second outer conductor 3. Further, 8 is the first protruding portion 1a of the first outer conductor 1.
And the third protrusion 3a of the second outer conductor 3 is a first spring. Further, 51 is a first center conductor pin having a spherical rotating structure 7 having conductivity at its tip, and 52 is a second center conductor soldered to the circuit pattern 12 of the printed circuit board 10. It's a pin. In addition, the same reference numerals as those in FIG. 5 showing the structure of the coaxial connector according to the third embodiment represent the same or corresponding parts as those in FIG.

Next, the characteristic structure and operation of the coaxial connector according to this embodiment will be described. The first center conductor pin 51 has an integrated structure with the insulator 2 and the second outer conductor 3, and the spherical rotating structure 7 is provided at the tip thereof. Further, one end of the second central conductor pin 52 is soldered to the circuit pattern 12 of the printed circuit board 10, and the other end of the second central conductor pin 52 contacts the spherical rotating structure 7 provided at the tip of the first central conductor pin 51. It is connected. That is, the first center conductor pin 51 and the second center conductor pin 52
Has a structure in which elastic contact is maintained through a spherical rotating structure 7 having conductivity attached to the tip of the first center conductor pin 51. Then, as in the case of the third embodiment, the second outer conductor 3 that is integrally structured with the insulator 2 and the first center conductor pin 51 has the first spring inside the first outer conductor 1. By the action of 8, the bottom portion of the second outer conductor 3 and the upper surface of the protruding portion 1b of the first outer conductor 1 are kept in elastic contact with each other and freely moved in a direction parallel to the surface of the printed circuit board 10. It has a movable structure.

In the coaxial connector according to the present embodiment having such a structure, even if the position of the mating coaxial connector is slightly displaced in the direction parallel to the surface of the printed circuit board 10, the second outer conductor 3, the insulator 2 and the first center conductor pin 51 move integrally in a direction parallel to the surface of the printed circuit board 10 and can be fitted to the mating coaxial connector. When the first central conductor pin 51 moves in a direction parallel to the surface of the printed circuit board 10 at the time of fitting, the spherical rotating structure 7 is provided at the tip of the first central conductor pin 51. Therefore, the first central conductor pin 5 is kept in stable contact with the second central conductor pin 52.
1 can move in a direction parallel to the surface of the printed circuit board 10. Also, when mated with the mating coaxial connector, the second
Even if the first central conductor pin 51, which is integrally formed with the outer conductor 3 of FIG. 1, moves in the direction parallel to the surface of the printed circuit board 10, the second central conductor pin 52 does not
Since it is fixedly connected to the 0 circuit pattern 12, the second
The distance between the center conductor pin 52 and the first outer conductor 1 does not change, fluctuations in the transfer characteristics of high-frequency signals are smaller than in the case of the third embodiment, and stable and highly reliable connection is possible. Become.

Fifth Embodiment of the Invention FIG. 7 is a sectional view showing the structure of the coaxial connector according to the fifth embodiment. In the coaxial connector according to the fourth embodiment described above, the spherical rotating structure 7 is attached to the tip of the first central conductor pin 51 to make the second central conductor pin 51.
The structure shown in FIG.
In the coaxial connector according to the present embodiment, the spherical rotating structure 7 having conductivity is attached to the tip of the second center conductor pin 52, and the first center conductor pin 51 having elasticity in the vertical direction is contact-connected. It has a structure that allows it. Since the other structure is the same as that of the coaxial connector in the fourth embodiment, the description thereof will be omitted. It goes without saying that the coaxial connector according to the present embodiment also has the same effects as those of the above-described fifth embodiment, and by adopting a structure in which the spherical rotating structure is attached to the tip of the second center conductor pin, This also has the effect of facilitating the production of parts inside the connector.

Sixth Embodiment FIG. 8 is a sectional view showing the structure of the coaxial connector according to the sixth embodiment. In the figure, 9 is a second spring arranged between the second projecting portion 1a of the first outer conductor 1 and the bottom of the second outer conductor 3. In addition, the same reference numerals as those in FIG. 5 showing the structure of the coaxial connector according to the third embodiment represent the same or corresponding parts as those in FIG.

The coaxial connector according to the present embodiment is different from the coaxial connector according to the third embodiment in that the second connector is further provided between the second protruding portion 1a of the first outer conductor 1 and the bottom portion of the second outer conductor 3. When the mating coaxial connector (not shown) is inserted at the time of fitting, the second outer conductor 3, the insulator 2, and the center conductor pin 5 which are integrally formed are moved downward by frictional force by providing the spring 9 of FIG. The spherical rotating structure 7 is pushed down (toward the printed circuit board 10) to come into contact with the circuit pattern 12 of the printed circuit board 10, and the mating coaxial connector is further inserted to ensure mating with the mating coaxial connector. To do. Further, when the mating coaxial connector is not fitted, as shown in FIG. 8, the spherical rotary structure 7 and the circuit pattern 12 are not in contact with each other.

In the case of the coaxial connector according to the third embodiment, the second projecting portion 1b of the first outer conductor 1 and the bottom portion of the second outer conductor 3 are in surface contact with each other. In the coaxial connector according to (4), the second protrusion 1b of the first outer conductor 1 and the bottom of the second outer conductor 3 contact only the second spring 9 and do not make surface contact. Therefore, the second projecting portion 1b of the first outer conductor 1 and the bottom portion of the second outer conductor 3 when the mating coaxial connector is fitted in a state of being displaced in the direction parallel to the surface of the printed circuit board 10. The contact frictional force with and becomes smaller than in the case of the coaxial connector according to the third embodiment, and the fitting can be performed more easily.

[0033]

According to the coaxial connector of the present invention, the substantially cylindrical first outer conductor fixedly connected to the circuit board by soldering and the first outer conductor are disposed inside the first outer conductor, and the first outer conductor is provided on the outer periphery. 2. A coaxial connector having a central conductor pin whose central portion is held by an insulator in which two outer conductors are formed,
The center conductor pin has elasticity, and a spherical rotating structure having conductivity is provided at the tip on the circuit board side, and when mounted on the circuit board, the spherical rotating structure has a structure similar to that of the circuit board. Since it is configured to make contact connection with the circuit pattern, fluctuations in high-frequency signal transfer characteristics due to differences in solder shape between the center conductor pin and the circuit pattern are eliminated, and the tip of the center conductor pin damages the surface of the circuit pattern. The stable and reliable connection between the center conductor pin and the circuit pattern can be obtained.

Further, according to the coaxial connector of the present invention, since the first outer conductor is fixedly connected to the circuit board by screwing, the connection between the center conductor pin and the circuit pattern is stable and highly reliable. In addition, the soldering work becomes unnecessary and the workability can be improved.

Further, according to the coaxial connector of the present invention, since the central conductor pin position adjusting mechanism for freely moving the central conductor pin in the direction parallel to the circuit board is provided, the central conductor pin and the circuit pattern are arranged between the central conductor pin and the circuit pattern. In addition, a stable and highly reliable connection can be obtained, and even if the position of the counterpart coaxial connector is slightly displaced, it can be easily fitted with the counterpart coaxial connector.

Further, according to the coaxial connector of the present invention, the central conductor pin position adjusting mechanism includes a first protruding portion formed in a shelf shape on the inner peripheral surface of the first outer conductor,
A second protrusion formed by protruding in a shelf shape on the inner peripheral surface of the first outer conductor in the vicinity of the end portion on the circuit board side, and a second protruding portion formed by protruding on the outer peripheral surface of the second outer conductor in a shelf shape. 3 of the first outer conductor is provided, and the first spring is arranged between the first protrusion of the first outer conductor and the third protrusion of the second outer conductor. The end of the second outer conductor on the side of the circuit board is brought into contact with the second protrusion, and the second outer conductor has a second end.
Since the second outer conductor is movably supported by the projecting part of the, the central conductor pin position adjusting mechanism can be realized with a simple structure, and stable and highly reliable connection can be obtained between the central conductor pin and the circuit pattern. In addition, even if the position of the mating coaxial connector is slightly displaced, the mating coaxial connector can be easily fitted.

Further, according to the coaxial connector of the present invention, the central conductor pin has a first central conductor pin having a central portion held by an insulator and a spherical rotating structure provided at the tip on the circuit board side, Since one end is fixedly connected to the circuit pattern of the circuit board and the other end is composed of the second center conductor pin to which the spherical rotary structure is contact-connected, the other end is fitted with the mating coaxial connector. Even if the position of the first central conductor pin is moved to some extent, the distance between the second central conductor pin and the first outer conductor does not change, the fluctuation of the transfer characteristic of the high frequency signal is reduced, and the stable reliability is further improved. Higher connection is possible.

Further, according to the coaxial connector of the present invention, since the spherical rotating structure is provided at the tip of the second central conductor pin, the spherical rotating structure is provided between the second central conductor pin and the first outer conductor. The distance does not change, stable and highly reliable connection is possible, and parts inside the connector are easily manufactured.

Further, according to the coaxial connector of the present invention, the second outer conductor protrudes like a shelf on the end surface of the second outer conductor on the side of the circuit board and the inner peripheral surface of the first outer conductor near the end on the side of the circuit board. Since the second spring is further arranged between the second protrusion formed by the above, the contact frictional force between the second protrusion of the first outer conductor and the bottom of the second outer conductor 3 is small. Becomes
Mating can be done more easily.

[Brief description of drawings]

FIG. 1 is a sectional view showing a structure of a coaxial connector according to a first embodiment.

FIG. 2 is a cross-sectional view showing a structural example of a mating coaxial connector to be fitted.

FIG. 3 is a cross-sectional view showing a state in which the coaxial connector according to the first embodiment is fitted with a mating coaxial connector.

FIG. 4 is a sectional view showing a structure of a coaxial connector according to a second embodiment.

FIG. 5 is a sectional view showing the structure of a coaxial connector according to a third embodiment.

FIG. 6 is a sectional view showing a structure of a coaxial connector according to a fourth embodiment.

FIG. 7 is a sectional view showing a structure of a coaxial connector according to a fifth embodiment.

FIG. 8 is a sectional view showing a structure of a coaxial connector according to a sixth embodiment.

FIG. 9 is a sectional view showing the structure of a conventional coaxial connector.

[Explanation of symbols]

1 1st outer conductor 1a 1st protrusion part 1b 2nd protrusion part 2 Insulator 3 2nd outer conductor 3a 3rd protrusion part 5 Center conductor pin 7 Spherical rotating structure 8 1st spring 9 2nd Spring 10 printed circuit board 11 circuit pattern 12 to which the first outer conductor is connected 13 circuit pattern to which the second outer conductor is connected 13 solder 14 screw hole 15 hole in printed circuit board 16 screw 51 first center conductor pin 51 Second Center Conductor Pin

Claims (7)

[Claims] 1. An insulation having a substantially cylindrical first outer conductor fixedly connected to a circuit board by soldering, and a second outer conductor formed on the outer periphery of the first outer conductor and arranged inside the first outer conductor. A coaxial connector having a central conductor pin whose central portion is held by a body, wherein the central conductor pin has elasticity, and a spherical rotating structure having conductivity is provided at a tip end on the circuit board side. A coaxial connector, wherein the spherical rotary structure makes a contact connection with a circuit pattern of the circuit board when mounted on the circuit board. 2. The coaxial connector according to claim 1, wherein the first outer conductor is fixedly connected to the circuit board by screwing. 3. The coaxial connector according to claim 1, further comprising a center conductor pin position adjusting mechanism that allows the center conductor pin to freely move in a direction parallel to the circuit board. 4. The center conductor pin position adjusting mechanism includes a first protrusion formed in a shelf shape on the inner peripheral surface of the first outer conductor, and the circuit board of the first outer conductor. A second projecting portion formed in a shelf shape on the inner peripheral surface near the end on the side and a third projecting portion formed in a shelf shape on the outer peripheral surface of the second outer conductor. A first spring is provided between the first protrusion of the first outer conductor and the third protrusion of the second outer conductor, and the first spring is disposed between the first protrusion and the third protrusion of the first outer conductor. The second outer conductor is movably supported by the second protrusion of the first outer conductor while the end of the second outer conductor on the circuit board side is brought into contact with the second protrusion. The coaxial connector according to claim 3, wherein: 5. The first conductor pin having the center portion held by the insulator, and the spherical rotating structure provided at the tip of the circuit board side, and the circuit pattern of the circuit board. 4. The coaxial connector according to claim 3, wherein one end is fixedly connected and the other end is composed of a second center conductor pin to which the spherical rotary structure is contact-connected. 6. The coaxial connector according to claim 5, wherein the spherical rotating structure is provided at a tip of the second center conductor pin. 7. A second protrusion formed in a shelf shape on the end surface of the second outer conductor on the circuit board side and on the inner peripheral surface of the first outer conductor in the vicinity of the end of the first outer conductor on the circuit board side. The coaxial connector according to claim 4, further comprising a second spring disposed between the second connector and the second portion.