JP2747966B2 - Coaxial plug connector and plug connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug connector,
In particular, the present invention relates to a plug connector connectable to a pin header of a backboard.

[0002]

2. Description of the Related Art Generally, connectors are divided into a power supply connector and a signal connector.

FIGS. 6 and 7 show a discrete type connector which is one of the power supply connectors. The discrete type connector includes a discrete plug 6 as shown in FIG. 6 and a pin header 7 as shown in FIG. 7, and the pin header 7 is mounted on the back board B.

In FIG. 6, (a) is a front view, (b) is a side view, and (c) is a bottom view. The discrete plug 6 has a plug housing 61. The plug housing 61 includes a bottom housing 61a, an upper housing 61b provided on the bottom housing 61a, and protrusions 61 projecting from both sides from the upper housing 61b.
c. As will be described later, the protrusion 61c plays a role of positioning when the discrete plug 6 is fitted to the pin header 7.

[0005] A plurality of (in this example, 60) spring-shaped contacts 63 are incorporated in the plug housing 61. Although not shown, 6 is provided in the bottom housing 61a.
Sixty contact accommodating holes for accommodating each of the zero spring-shaped contacts 63 are formed. As shown in FIG. 6C, 60 pin insertion holes 67 into which pin contacts of the pin header 7 described later are inserted at positions corresponding to the 60 contact receiving holes on the bottom surface 65 of the bottom housing 61a. Is empty. That is, the bottom surface 65 of the bottom housing 61a forms a fitting surface for fitting with the pin header 7 described later.

As shown in FIG. 6 (c), 60 pin insertion holes 67 are arranged in 20 rows of 3 in each row, and 20 rows are alternately shifted between odd rows and even rows. It is arranged. In this way, the 60 pin insertion holes 67 are
(C) It is provided at six different distances with reference to one of the upper and lower ends. In correspondence with these six types of distances,
The spring contacts 63 are classified into six types. As is well known, each spring-shaped contact 63 has a contact portion (not shown) accommodated in the contact accommodating hole, a connection portion 63a connected to a substrate (not shown), and the contact portion and the connection portion 63a mutually connected. And an intermediate portion 63b. As is clear from FIG. 6B, the intermediate portion 63b extending upward from the contact portion is bent toward the upper housing 61b, and the connection portion 63a is formed.
Is inserted through a through hole (not shown) formed in the upper housing 61b. Therefore, in FIG. 6B, the contact portion of the spring-shaped contact 63 extends in the vertical direction, whereas the connection portion 63 of the spring-shaped contact 63 is extended.
a extends in the horizontal direction.

7A is a plan view, FIG. 7B is a side view, and FIG. 7C is a front view. The pin header 7 has a hollow box-shaped header housing 71 whose upper surface is open.
The size of the inner wall surface of the header housing 71 is substantially equal to the size of the bottom housing 61a of the plug housing 61.
The size of the outer wall is the same. 60 pin contacts 73 are implanted inside the header housing 71 so as to extend upward from the bottom surface 75 of the header housing 71 and are arranged at predetermined intervals. The 60 pin contacts 73 are provided at positions corresponding to the 60 pin insertion holes 67 formed on the bottom surface 65 of the bottom housing 61a. On both side walls of the header housing 71, rectangular recesses 71a are formed at positions corresponding to the projections 61c of the plug housing 61.

In the discrete type connector having such a structure, the discrete plug 6 shown in FIG. 6 and the pin header 7 shown in FIG.
The protrusion 61c of the housing 61 is the header housing 7
When it fits so as to fit in the recessed portion 71a of the first housing 61 and the fitting surface 65 of the bottom housing 61a is mechanically brought into contact with the bottom surface 75 of the header housing 71, the 60 pin contacts 73 respectively correspond to each other. It electrically contacts the contact portions of the 60 spring-shaped contacts 63 in the plug housing 61 through the 60 pin insertion holes 67.

FIGS. 8 and 9 show a high-speed signal transmission connector which is one of the signal connectors. The illustrated connector for high-speed signal transmission is of a coaxial type.
This coaxial type connector includes a plug (coaxial plug connector) 8 as shown in FIG. 8 and a receptacle 9 as shown in FIG. 9, and the receptacle 9 is mounted in the back board B.

FIG. 8A is a front view, FIG. 8B is a side sectional view, and FIG. 8C is a bottom view. The plug 8 has a hollow box-shaped plug housing 81 having an open bottom surface. The plug housing 81 includes a bottom housing 81a and an upper housing 8 provided on the bottom housing 81a.
1b, and a projection 81c protruding to both sides from the upper housing 81b. As shown in FIG. 8B, a plurality of (30 in this example) coaxial contacts 83 extending in the vertical direction are provided in the plug housing 81. As shown in FIG. 8C, thirty coaxial contacts 83 are arranged in ten rows of three. Each coaxial contact 83 includes a cylindrical insulator 83a and the insulator 83a.
And a cylindrical outer conductor 83c provided on the outer peripheral surface of the insulator 83a.
And The center conductor 83b extends upward as a rod-shaped contact 83b-1, and the rod-shaped contact 83b
-1 is bent at a right angle on the way, and the signal terminal 85b-
It is set to 1. Similarly, a part of the outer conductor 83c extends upward as a rod-shaped conductor 83c-1, and the rod-shaped conductor 83c-1
c-1 is also bent at a right angle on the way, and the ground terminal 85 is formed.
c-1. Signal terminal 85b-1 and ground terminal 8
5c-1 is collectively called a terminal unit 85. The terminal portion 85 is connected to the substrate P via the locator 87.
In addition, as shown in FIG.
Are classified into three types. Also, plug housing 81
The upper surface of the bottom housing 81a forms a fitting surface 89 into which a receptacle 9 described later fits.

FIG. 9A is a plan view, FIG. 9B is a side sectional view, and FIG. 9C is a front view. The receptacle 9 has a receptacle housing 91 having an open bottom surface.
The size of the outer wall surface of the receptacle housing 91 is substantially the same as the size of the inner wall surface of the bottom housing 81a of the plug housing 81. The receptacle housing 91 has 30 coaxial contacts 83.
There are 30 through holes 93 in which they can be inserted. A guide plate 95 is fitted and provided in the bottom opening of the receptacle housing 91. Each through hole 93
A pin 97 is provided at the center of the hole 97 and extends upward from the bottom surface through the guide plate 95, and an external conductor 99 is provided on the inner peripheral surface of each through hole 93.

In the connector for high-speed signal transmission having such a structure, the plug 8 shown in FIG. 8 and the receptacle 9 shown in FIG.
1 is inserted into the bottom housing 81a of the plug housing 81 toward the mating surface 89, the 30 coaxial contacts 83 correspond to the corresponding 3
It is inserted into zero through holes 93. Thus, the center contact 83b of the coaxial contact 83 and the outer conductor 83
c electrically contact the pin 97 and the external conductor 99 of the corresponding through hole 93, respectively.

[0013]

By the way, when the power supply and signal connectors are mixedly mounted on the back board B,
That is, when both the connector of the pin header 7 and the connector of the receptacle 9 are mounted on the back board B, it is necessary to confirm the mounting position at the time of mounting, and the man-hour has been increased.

The present invention has been proposed in view of such problems in the prior art, and has been proposed to reduce the number of types of connectors mounted on a backboard and to reduce the number of man-hours during mounting. An object of the present invention is to provide a coaxial plug connector and a plug connector for transmission.

[0015]

According to a first aspect of the present invention, n (n is an even number of 2 or more) pin contacts are implanted at a predetermined interval and mounted on a backboard. A (n / 2) coaxial plug connector capable of fitting and connecting to a pin header, having a center conductor and an outer conductor on a pin header fitting connection side and having a terminal portion connectable to a board or a coaxial cable on the other side. It has a coaxial contact and a housing for accommodating the (n / 2) coaxial contacts in a predetermined arrangement, and each of the outer conductors of the (n / 2) coaxial contacts has (n / 2) conductive members. A spring piece is provided extending to the pin header fitting connection side, so that the center conductor of the (n / 2) coaxial contacts is (n / 2).
/ 2) electrical contact with the pin contacts and (n)
The coaxial plug connector is characterized in that the coaxial plug connector can be fitted and connected to the pin header such that (/ 2) spring pieces are in electrical contact with the remaining (n / 2) pin contacts. Can be

According to a second aspect of the present invention, n
(N is an integer of 2 or more) a plug connector in which pin contacts are implanted at a predetermined interval and can be fitted and connected to a pin header mounted on a back board, and a center conductor is provided on the pin header fitting connection side. And m coaxial contacts having a terminal portion connectable to a substrate or a coaxial cable on the other side, and a connection portion having a contact portion on the pin header fitting connection side and connectable to the substrate or the cable on the other side. K (k = n-2m) spring-shaped contacts having a portion, and a housing for accommodating m coaxial contacts and k spring-shaped contacts in a predetermined arrangement. Each of the outer conductors is provided with m conductive spring pieces extending to the pin header fitting connection side, whereby the center conductor and the spring pieces of the m coaxial contacts are provided. The plug connector can be fitted and connected to the pin header so that the corresponding 2m pin contacts are in electrical contact and the contacts of the k spring-shaped contacts are in electrical contact with the remaining k pin contacts. A plug connector characterized by the following is obtained.

[0017]

The coaxial plug connector according to the first aspect of the present invention accommodates (n / 2) coaxial contacts in a predetermined arrangement in a housing. Each coaxial contact has a center conductor, an outer conductor, and a conductive spring piece provided on the outer conductor. Therefore, when the coaxial plug connector having such a configuration is fitted and connected to a pin header in which n pin contacts are implanted at predetermined intervals, the center conductor of the (n / 2) coaxial contacts becomes (n / 2). And (n / 2) spring pieces are in electrical contact with the remaining (n / 2) pin contacts.

In the plug connector according to the second aspect of the present invention, m coaxial contacts and k spring-type contacts are accommodated in a housing in a predetermined arrangement. Each coaxial contact has a center conductor, an outer conductor, and a conductive spring piece provided on the outer conductor. Each spring contact has a contact. Therefore, when the plug connector having such a configuration is fitted and connected to a pin header in which n (n = k + 2m) pin contacts are implanted at predetermined intervals, the center conductor and the spring piece of the m coaxial contacts correspond. 2
Electrical contact is made with the m pin contacts, and the contact portions of the k spring-shaped contacts are in electrical contact with the remaining k pin contacts.

[0019]

Next, an embodiment of the present invention will be described.

FIG. 1 shows a coaxial contact 10 used in the coaxial plug connector according to the present invention. Coaxial contact 10
Has the same configuration as the coaxial contact 83 shown in FIG. 8 except that it has a spring piece described later. The coaxial contact 10 has a cylindrical insulator 11, a central conductor 13 provided on an inner peripheral surface of the insulator 11, and a cylindrical outer conductor 15 provided on an outer peripheral surface of the insulator 11. One end of the central conductor 13 extends as a bar-shaped contact (not shown), and the bar-shaped contact is bent at a right angle on the way to be a signal terminal 18. Similarly, the outer conductor 15 partially extends from one end thereof as a rod-shaped conductor (not shown), and the rod-shaped conductor is also bent at a right angle on the way to be a ground terminal 19. The signal terminal 18 and the ground terminal 19 are collectively called a terminal unit. The insulator 11 on the side opposite to the terminal is open as shown in FIG. A conductive spring piece 16 having a connection opening in the same direction as the opening of the insulator 11 is provided on the side of the outer conductor 15 integrally with the outer conductor 15. The spring piece 16 is composed of a pair of spring piece elements 16a and 16b as shown in FIG. 1, thereby pinching a pin contact as described later.

FIG. 2 shows the coaxial contact 10 shown in FIG.
Shows a coaxial plug connector 2 in which 30 are loaded inside.
2, (a) is a front view, (b) is a side view,
(C) shows a bottom view. The coaxial plug connector 2 has a plug housing 21. The outer shape of the plug housing 21 itself has the same shape as the plug housing 61 of the prior art discrete plug shown in FIG. That is, the plug housing 21 includes a bottom housing 21a, an upper housing 21b provided on the bottom housing 21a, and an upper housing 21b.
b and a projection 21c protruding from both sides.
As will be described later, the protrusion 21c is connected to the coaxial plug connector 2.
Plays a role of positioning when fitted to a pin header described later. However, the plug housing 61 contains 60 spring-type contacts 63 therein, while the plug housing 11 contains 30 coaxial contacts 10 shown in FIG. 1 therein.

In the plug housing 21, 30 coaxial contacts 10 with spring pieces shown in FIG. Although not shown, the bottom housing 21a has 3
Thirty contact accommodating holes for accommodating each of the zero coaxial contacts with spring pieces 10 are formed. As shown in FIG. 2C, on the bottom surface 25 of the bottom housing 21a, 60 pin insertion holes 27 into which pin contacts of a pin header described later are inserted are provided at positions corresponding to the 30 contact receiving holes. It is empty. That is, each contact accommodating hole corresponds to the two pin insertion holes 27, and the bottom surface 25 of the bottom housing 21a forms a fitting surface for fitting with a pin header described later.

As shown in FIG. 2C, the 60 pin insertion holes 27 are arranged in 20 rows of 3 in each row, and the 20 rows are alternately shifted between odd rows and even rows. It is arranged. Thus, the 60 pin insertion holes 27 are
(C) It is provided at six different distances with reference to one of the upper and lower ends. Counting from the left end of FIG.
The odd rows of the pin insertion holes 27 are provided at positions corresponding to the spring pieces 16 of the coaxial contact 10 (FIG. 1).
7 are provided at positions corresponding to the center conductor 13 (FIG. 1) of the coaxial contact 10. For example, FIG.
In (c), of the pair of pin insertion holes at the lower left, the pin insertion hole 27-1 is for the spring piece 16 of the coaxial contact 10, and the pin insertion hole 27-2 is for the center conductor 13 of the coaxial contact 10. Things. As described above, since the pair of pin insertion holes 27-1 <27-2 correspond to one coaxial contact 10 with spring piece, the coaxial contact 10 with spring piece housed in the coaxial plug connector 2 has 3 pins as described later. There are kinds of things.

FIG. 3 shows the above-mentioned coaxial contact 1 with a spring piece.
1 shows a pin header 3 that is fitted and connected to a coaxial plug connector 2 having 30 built-in 0s. The illustrated pin header 3 is exactly the same in structure as the pin header 7 shown in FIG. 3A is a plan view, FIG. 3B is a side view, and FIG. 3C is a front view. The pin header 3 has a hollow box-shaped header housing 31 whose upper surface is open. The size of the inner wall surface of the header housing 31 is substantially the same as the size of the outer wall surface of the bottom housing 21a of the plug housing 21. 60 pin contacts 33 are provided inside the header housing 31.
Plants are extended from the bottom surface 35 of the housing 31 and are arranged at predetermined intervals. The 60 pin contacts 33 are respectively provided at positions corresponding to the 60 pin insertion holes 27 formed in the bottom surface 25 of the bottom housing 21a. On both side walls of the header housing 31, rectangular recesses 31a are formed at positions corresponding to the projections 21c of the plug housing 21.

In the pin header 7 shown in FIG. 7, as described above, the 60 pin contacts 73 are connected to the 60 spring-type contacts in the plug housing 61 through the corresponding 60 pin insertion holes 67, respectively. It makes electrical contact with the contact portion 63. On the other hand, in the pin header 3 shown in FIG. 3, the 30 pin contacts 33 are respectively connected to the center conductor 13 of the coaxial contact 10 of the plug housing 21 through the corresponding 30 pin insertion holes 27.
Electrical contact with the remaining 30 pin contacts 33
Of the coaxial contact 10 of the plug housing 21 through the corresponding thirty pin insertion holes 27.
6 and make electrical contact. For example, in FIG.
Of the pair of pin contacts at the lower right, pin contact 33
-1 is connected to the spring piece 16 of the coaxial contact 10, and the pin contact 33-2 is the center conductor 1 of the coaxial contact 10.
Connect to 3.

FIG. 4 shows the internal structure of the coaxial plug connector 2 and the pin header 3 shown in FIGS. 2 and 3 in detail.
4A is a longitudinal sectional view of the coaxial plug connector 2, FIG. 4B is a sectional view of the pin header 3, and FIG. 4C is a partial transverse sectional view of the coaxial plug connector 1.

As shown in FIG. 4A, the coaxial plug contact 1 with a spring piece incorporated in the coaxial plug connector 2
It can be seen that there are three types of 0s corresponding to three of the rows of the pin insertion holes 27-2 in the even rows. Signal terminal 18
And a ground terminal 19 are connected to the locator 17.
And connected to the substrate P or a coaxial cable (not shown).

As shown in FIG. 4 (b), three pin contacts of the pin header 3 are connected to the spring pieces 16 of the coaxial contact 10 with spring pieces, respectively, in odd and even rows. 1 and a pin contact 33 connected to the center conductor 13 of the coaxial contact 10
It can be seen that -2 is arranged.

As shown in FIG. 4C, the coaxial plug contact 1 with a spring piece incorporated in the coaxial plug connector 1
The zeros are arranged in a staggered manner so that they all face in the same direction. However, it goes without saying that the arrangement and orientation of the coaxial contacts 10 with spring pieces are not limited to those shown in FIG.

FIG. 5 shows a plug connector 5 according to another embodiment of the present invention.
12 coaxial contacts 10 with spring pieces shown in FIG.
This is one in which 36 spring-type contacts 63 shown in FIG. 6 are loaded. 5, (a) is a front view, (b) is a side view, (c) is a bottom view, (d) is a cross-sectional view taken along line AA of (a), and (e) is a cross-sectional view of B- FIG.

The plug connector 5 is a plug housing 5
One. The plug housing 51 includes a bottom housing 51a, an upper housing 51b provided on the bottom housing 51a, and protrusions 51c protruding to both sides from the upper housing 51b. The projection 51c plays a role in positioning when the plug connector 5 is fitted to the pin header 3 shown in FIG.

In FIG. 5 (c), twelve coaxial contacts 10 with spring pieces shown in FIG. 1 are built in a central portion C in the plug housing 51, and both ends in the plug housing 51 are shown in FIG. The spring-type contact 63 shown
Built-in book. As shown in FIG. 5D, twelve contact accommodation holes 52 for accommodating the twelve coaxial contacts 10 with spring pieces are formed in the center part C of the bottom housing 51a. . Further, as shown in FIG. 5E, 36 contact accommodation holes 53 for accommodating 36 spring-shaped contacts 63 are formed at both ends of the bottom housing 51a. As shown in FIG. 5 (c), the center portion C of the bottom surface 55 of the bottom housing 51a is located at a position corresponding to the twelve contact accommodating holes 52 for the twelve coaxial contacts 10 with spring pieces in FIG. Pin header 3 shown
24 pin insertion holes 57-1 and 57-2 into which the pin contacts 33 are inserted are formed, and the bottom housing 51a is formed.
36 spring-shaped contacts 6 on both sides of the bottom surface 55
36 pin insertion holes 57-3 into which the pin contacts 33 of the pin header 3 shown in FIG. 3 are inserted are provided at positions corresponding to the 36 contact accommodation holes 53 for three pins. The bottom surface 55 of the bottom housing 51a forms a fitting surface for fitting with the pin header 3 shown in FIG.

As shown in FIG. 5C, the fitting surface 55
24 pin insertion holes 57-1,
57-2 are arranged in eight rows, three in one row, and the eight rows are alternately shifted between odd-numbered rows and even-numbered rows. 5C, the odd-numbered pin insertion holes 57-1 are provided at positions corresponding to the spring pieces 16 of the coaxial contact 10 (FIG. 1), and the even-numbered pin insertion holes 57-2 are counted.
Is provided at a position corresponding to the center conductor 13 (FIG. 1) of the coaxial contact 10 of FIG. As described above, since the pair of pin insertion holes 57-1 and 57-2 correspond to one coaxial contact 10 with spring pieces, the coaxial contact 10 with spring pieces housed in the coaxial plug connector 5 has the configuration shown in FIG. ), There are three types.

On the other hand, 3 provided on both ends of the fitting surface 55
6 (18 on each of the left and right sides in FIG.
Of the pin insertion holes 57-3).
They are arranged in rows, and the twelve rows are arranged alternately in odd rows and even rows. As described above, the 36 pin insertion holes 57-3 are provided at positions separated by six kinds of distances with reference to one of the upper and lower ends of FIG. 5C. In correspondence with these six types of distances, the spring type contact 63
As shown in (e), it is classified into six types. In FIG. 5E, only the three types of spring-type contacts 63 are shown in their entirety, and only some of the remaining three types are shown. As is clear from FIG. 5E, each spring-type contact 63 is connected to the contact portion 63c accommodated in the contact accommodating hole 53, the connection portion 63a connected to the substrate P via the locator 17a, and the contact portion 63c. And an intermediate portion 63b interconnecting the portion 63a.

As described above, the coaxial plug connector 5 shown in FIG. 5 has a plurality of coaxial contacts 10 and a plurality of spring-type contacts 63 separately incorporated in a plug housing 51 thereof, thereby providing a high-speed signal. Is a composite type connector using a coaxial contact 10 and a low-speed signal with a spring-type contact 63. In such a composite type connector, in general, the number of coaxial contacts with spring pieces and the number of spring-type contacts incorporated therein are m and k, respectively, and the number of pin contacts of the pin header to which these are fitted is n. These numbers include n = 2m
+ K.

[0036]

As is apparent from the above description, according to the present invention, a spring piece is formed on the outer conductor of the coaxial contact of the coaxial plug connector, and both the center conductor and the spring piece of the coaxial plug connector are connected to the pin header. A direct contact can be made with the pin contact, so that the connector on the backboard side can be shared with the conventional pin header, and a coaxial plug connector for high-speed signal transmission that can reduce man-hours during mounting is obtained. be able to. In addition, if the plug connector incorporates a separate coaxial contact and spring type contact and is combined, there is an advantage that it is not necessary to divide the plug connector into a high-speed signal and a low-speed signal / power supply. .

[Brief description of the drawings]

FIG. 1 is a perspective view showing a coaxial contact used for a coaxial plug connector according to a first embodiment of the present invention.

FIGS. 2A and 2B are views showing the appearance of a coaxial plug connector according to a first embodiment of the present invention, in which a plurality of coaxial contacts shown in FIG. 1 are incorporated, wherein FIG. 2A is a front view and FIG. ,
(C) is a bottom view.

3A and 3B are views showing the appearance of a pin header fitted with the coaxial plug connector shown in FIG. 2, wherein FIG. 3A is a plan view, FIG. 3B is a side view, and FIG. .

4A and 4B are diagrams showing the internal structure of the coaxial plug connector and the pin header shown in FIGS. 2 and 3, wherein FIG. 4A is a longitudinal sectional view of the coaxial plug connector, FIG. 4B is a longitudinal sectional view of the pin header, and FIG. () Is a partial cross-sectional view of the coaxial plug connector.

FIGS. 5A and 5B are views showing an appearance and an internal structure of a plug connector according to a second embodiment of the present invention, wherein FIG. 5A is a front view and FIG.
Is a side view, (c) is a bottom view, (d) is A in (a).
FIG. 7A is a cross-sectional view taken along line A, and FIG. 7E is a cross-sectional view taken along line BB in FIG.

6A and 6B are views showing the appearance of a conventional discrete plug connector, wherein FIG. 6A is a front view, FIG. 6B is a side view, and FIG.
Is a bottom view.

7A and 7B are diagrams showing the appearance of a pin header fitted with the discrete plug connector shown in FIG. 6 , wherein FIG. 7A is a plan view, FIG. 7B is a side view, and FIG.

8A and 8B are views showing the appearance and internal structure of a conventional coaxial plug connector, wherein FIG. 8A is a front view, FIG.
(C) is a bottom view.

9A and 9B are views showing the appearance and internal structure of a receptacle fitted with the coaxial plug connector shown in FIG. 8, wherein FIG. 9A is a plan view, FIG. 9B is a side sectional view, and FIG. is there.

[Explanation of symbols]

 2 Coaxial plug connector 3 Pin header 5 Plug connector 10 Coaxial contact 11 Insulator 13 Center conductor 15 External conductor 16 Spring piece 18 Signal terminal 19 Ground terminal 21 Plug housing 21a Bottom housing 21b Upper housing 21c Projection 25 Bottom (fitting surface) 27 , 27-1.27-2 Pin insertion hole 51 Plug housing 51a Bottom housing 51b Upper housing 51c Projection 52, 53 Contact accommodation hole 57-1, 57-2, 57-3 Pin insertion hole 63 Spring type contact

Claims (2)

(57) [Claims] 1. A coaxial plug connector in which n (n is an even number of 2 or more) pin contacts are implanted at predetermined intervals and can be fitted and connected to a pin header mounted on a backboard. (N / 2) coaxial contacts having a center conductor and an outer conductor on the fitting connection side and having a terminal portion connectable to a substrate or a coaxial cable on the other side; and (n / 2) coaxial contacts. (N / 2) conductive spring pieces extend to the pin header fitting connection side on the outer conductors of the (n / 2) coaxial contacts, respectively. Thereby, the center conductor of the (n / 2) coaxial contacts makes electrical contact with the (n / 2) pin contacts, and the (n / 2) spring pieces remain. (N /
2) The coaxial plug connector, wherein the coaxial plug connector can be fitted and connected to the pin header so as to make electrical contact with the pin contacts. 2. A plug connector in which n (n is an integer of 2 or more) pin contacts are implanted at predetermined intervals and can be fitted and connected to a pin header mounted on a backboard. M coaxial contacts having a central conductor and an outer conductor on the mating connection side and having a terminal portion connectable to the substrate or coaxial cable on the other side, and a contact portion on the pin header fitting connection side and the substrate on the other side. Alternatively, k (k = n−2m) spring-shaped contacts having a connection portion connectable to a cable, and a housing accommodating the m coaxial contacts and the k spring-shaped contacts in a predetermined arrangement. The outer conductors of the m coaxial contacts are provided with m conductive spring pieces each extending to the pin header fitting connection side, whereby The center conductor and the spring piece of the two coaxial contacts are in electrical contact with the corresponding 2 m pin contacts, and the contact portions of the k spring contacts are electrically connected to the remaining k pin contacts. The plug connector can be fitted and connected to the pin header so that the plug connector contacts the plug header.