JP2001028284A - Coaxial connector contact for printed board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the transmission characteristic of a coaxial connector contact for a printed board and to improve workability in electrical connections. SOLUTION: Signal leads 37 and ground metal pieces 38 are disposed on an electronic circuit package 12. The signal lead 37 is connected to a signal terminal 39, while the ground metal piece 38 is disposed such that the ground metal piece 38 surrounds three sides except the flat face part of the electronic circuit package 12, and is connected to a ground via a ground terminal 40 formed on the electronic circuit package 12. The signal lead 37 is disposed such that the signal lead 37 projects from the ground metal piece 38 by ΔL. Accordingly, that portion has an impedance-regulated pseudo-coaxial structure. A coaxial connector is terminated to the signal terminals 39 and the ground terminals 40 on the electronic circuit package 12 in those portions and is connected to a circuit pattern on the electronic circuit package 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a coaxial connector contact for a printed circuit board.

[0002]

2. Description of the Related Art In the internal mounting of high-performance and high-performance electronic devices, high-speed transmission and device mounting in consideration of frequency characteristics are performed, and coaxial connectors are often used. In recent implementations, the number of input / output lines of the electronic device is very large, so that a multi-core connector is often used inside the device. In order to realize higher-density mounting, it is necessary not only to make the number of cores large but also to reduce the pitch of the connectors and to consider the size of the connectors.

[0003]

As the density is increased, the following problem arises. One is that there is a limit to the pitch at which the connector structure can be realized. This means that the connector cannot be physically configured.Especially, in the case of a coaxial connector, the connector must be configured according to the characteristic impedance of the device to be used, but if the external dimensions of the coaxial contact are reduced, Therefore, the degree of freedom in designing is reduced, so that even if a design drawing is completed, there is a possibility that the manufacturing level of the components constituting the connector may not be able to keep up. Alternatively, even if parts can be manufactured, the durability may be poor. On the other hand, if the mechanical structure is designed with sufficient consideration, the required impedance characteristics may not be satisfied.

[0004] Another problem is a limitation in arranging multi-core coaxial connectors mounted on a printed circuit board at a constant pitch between boards by bookshelf mounting or the like. The mounting interval between printed circuit boards is often determined by the pitch between printed circuit boards in terms of the height of components mounted on the printed circuit board, transmission characteristics, and thermal measures to prevent abnormalities due to active element heat generation. However, when the height of the component with respect to the board surface is larger than the height of the connector, the height of the connector from the board surface and the size of the connector itself limit mounting conditions. When high-density mounting is performed, the distance between the printed circuit boards should be as short as possible.However, if the coaxial connector housing has a guide mechanism at the time of fitting, the external dimensions of the connector assembly will increase accordingly, and The mounting density of the entire device is reduced.

[0005] Further, in the electrical connection of the external conductor, it is difficult to obtain a contact structure capable of obtaining an effective contact force. Even if a coaxial contact can be configured with the conventional structure, the number of parts increases, and assembly becomes complicated.

Another handicap in the case of high-density mounting is a restriction on mounting dimensions, especially outer dimensions, of the entire electronic device. If the packaging density is maximized while the outer shape is made as compact as possible, there is a risk that mounting in consideration of maintenance will not be possible. For example, in a commonly used method of accessing a unit frame of a printed circuit board, a lever attached to an end of the printed circuit board is often attached to and detached from the unit frame, but these parts may interfere with the configuration. . There is a method of making the lever itself detachable from the substrate, but this is not very effective when the distance between the printed circuit boards is small. Further, in a mounting structure subject to strong vibration, the connection of the connector must not be disengaged due to the loosening of the board, so a structure that can be completely fixed is required.

Still another problem is a problem in fitting a multi-core connector. The fitting of the connector itself can be solved by making the pitch precision of the connector to be fitted precise, etc., but when mounting the electronic circuit package in a unit frame etc., the electronic circuit package up to the connector fitting Guidance accuracy is relevant. For example, when a connector is directly guided by an electronic circuit package, the mounting position of the connector and the manufacturing accuracy of the electronic circuit package are affected.

[0008] Still another problem is to maintain transmission characteristics when transmitting high-frequency signals. A coaxial connector structure is often used for the connector portion because of easy impedance adjustment and simple configuration, but a contact portion (terminal portion) between the board and the like and the connector often cannot maintain the coaxial structure. Therefore, it is necessary to incorporate a shape designed according to the impedance system of the transmission line as far as the structural dimensions allow.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks of the prior art, and to improve the transmission characteristics of a coaxial connector contact for a printed circuit board and the workability of electrical connection.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a ground structure is formed by a structure surrounding signal terminals on three sides other than a plane portion of a substrate, and a signal lead arranged on the surface of the substrate is provided. A coaxial connector contact for a printed circuit board, which protrudes from a ground structure and terminates on the printed circuit board, is adopted as the means.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to easily understand a coaxial connector contact for a printed circuit board according to an embodiment of the present invention, first, reference examples of related art will be described.

A first reference example of the present invention will be described with reference to the drawings. FIG. 2 is a schematic perspective view of a pin-side coaxial connector assembly functioning as a receptacle. A plurality of twin contact pieces 2 are formed on a metal bar (bar) 1 so as to face each other. The contact pieces 2 are arranged at equal intervals on the bar, and a through hole 3 is opened in the center of the bar at the center of the contact piece 2, and an insulator 4 and a pin 5 are arranged there. The twin contact piece 2 is an outer conductor 16 of the socket side coaxial contact 6 (see FIG. 5).
, And functions as an external conductor, but the contact piece 2 is formed by shaving from a bar and has an integral structure.
The through-hole 3 forms a small counterbore (a small amount of the insulator is retracted ... part z in FIGS. 2 and 5).

In the present embodiment, the shape is such that the direct contact piece is formed by cutting the metal bar, but a similar shape may be formed by press molding.

In this embodiment, the terminal coaxial connector assembly 7 is accommodated in a large number of printed circuit boards (backboards) 11 (see FIG. 5).
Although it is assumed that soldering is used, a solderless connection using compliant pins or a form that is pulled out by a coaxial cable may be used.

In FIG. 5, reference numeral 13 denotes a receptacle-side center conductor terminal (for a backboard), and reference numeral 14 denotes a receptacle-side external conductor terminal (for a backboard).

FIG. 3 shows an example of the shape of the plug coaxial connector assembly 8 which fits with the receptacle coaxial connector assembly 7 and whose central conductor is a socket. The individual socket-side coaxial contacts 6 are arranged at the same value as the pitch of the receptacle coaxial connector assembly 7 and are held by the housing 9 of the plug coaxial connector.

The plug coaxial connector assembly 8 is mounted on the electronic circuit package 12.

The processing of the terminal portion of the plug coaxial connector assembly 8 may be a shape arranged in a pattern on a printed circuit board or a coaxial cable.

FIG. 4 is a perspective view showing an image when the first embodiment of the present invention constitutes an electronic device via a backboard.

FIG. 5 is a sectional view showing a fitted state of the first embodiment of the present invention. Two twin contact pieces 2 in the figure are in contact with the outer conductor 16 of the socket-side coaxial contact 6 of the plug coaxial connector assembly 8. In the opening 10 of the coaxial pin contact, the insulator 4a is slightly receded, and the mating socket-side coaxial contact 6 penetrates into the bar 1 in order to maintain the shielding effect of the center conductor (part z). .

Reference numeral 15 denotes a socket contact.

FIG. 6 is a perspective view of a mounting image of an orthogonal printed circuit board according to a second reference example of the present invention. The present embodiment is a coaxial connector assembly having 16 coaxial contacts per electronic circuit package. Pins and sockets of coaxial contacts arranged at equal intervals,
Each is arranged. FIG. 7 is a partially broken perspective view of the pin-side coaxial connector assembly 18 in which the center conductor is a pin. The metal bar is the housing 17 of the pin-side coaxial connector assembly, on which the twin contact pieces 2 are formed. The contact pieces 2 are arranged at equal intervals on the bar. At the same position as the contact piece 2, a through hole 3 is opened at the center of the bar, and an insulator 4a and a pin 5 are arranged there. The twin contact piece 2 is connected to the outer conductor 16 of the socket side coaxial contact 6.
, And functions as an external conductor, but the contact piece 2 is formed by shaving from a bar and has an integral structure.
The through-hole forms a small counterbore (a small amount of the insulator is recessed ... part z in FIG. 7).

In the present embodiment, the contact piece is provided on the metal bar, but a similar shape may be formed by press molding.

FIG. 6 shows an example of the shape of a socket-side coaxial connector assembly 19 which fits with the pin-side coaxial connector assembly 18 and whose central conductor is a socket. The individual socket-side coaxial contacts 6 are arranged at the same pitch as the pitch of the pin-side coaxial connector, and are held by the housing 20 of the socket-side coaxial connector.

The processing of the terminal portion of the connector may be a through-hole, a surface mount, or any other shape as long as the shape is such that it is wired in a pattern on a printed circuit board.

FIG. 8 is a perspective view showing an image when the second embodiment of the present invention is applied to a three-dimensional mounting structure and mounted on an electronic circuit package housing unit. An electronic circuit package A21 on which the pin-side coaxial connector assembly 18 is mounted;
The electronic circuit package B22 on which the socket-side coaxial connector assembly 19 is mounted is housed in the electronic circuit package housing unit frame 23. 24 is a frame.

FIG. 9 is a sectional view showing a fitted state of the present embodiment. FIG. 9A is a cross-sectional view of the electronic circuit package A21 on which the pin-side coaxial connector assembly 18 is mounted, and FIG. 9B is a cross-sectional view of the electronic circuit package B22 on which the socket-side coaxial connector assembly 19 is mounted. FIG. There are two twin contact pieces 2 in the figure,
Outer conductor 16 of socket side coaxial connector assembly 19
Is in contact with In order to maintain the shielding effect of the coaxial contact, the insulator 4a is formed in the opening 10 of the coaxial pin contact.
Is slightly receded, and the mating socket-side coaxial contact 6 penetrates into the bar 1.

Reference numeral 25 denotes a connecting portion of the coaxial connector with the electronic circuit package board of the center conductor terminal, and
Is a connection portion of the coaxial connector with the external conductor terminal of the electronic circuit package board.

FIGS. 10 to 13 are explanatory diagrams of a third reference example of the present invention. FIG. 10 is a perspective view of a mounting image of a printed circuit board that is orthogonal. In the present reference example, a coaxial connector assembly having 16 coaxial contacts whose central conductor is a socket is provided per electronic circuit package. FIG.
1 is an enlarged perspective view of a pin-side coaxial connector assembly. The twin contact piece 2 of the housing 17A of the pin side connector assembly is formed. The contact pieces 2 are arranged at equal intervals on the bar. At the same position as the contact piece 2, a through hole 3 is opened at the center of the bar, and an insulator 4a and a pin 5 are arranged there. The twin contact piece 2 comes into contact with the outer conductor 16 of the socket-side coaxial contact 6 and functions as an outer conductor of the coaxial line. The contact piece 2 is formed of a bar and has an integral structure. The through-hole 3 into which the insulator 4a is incorporated forms a small counterbore space z (made by retracting the insulator a little). The housing 17B of the pin-side coaxial connector assembly is a member having exactly the same shape as the housing 17A of the pin-side coaxial connector assembly.
The two sides are assembled together with the surfaces on the sides not attached together. This constitutes a basic part of the center connector assembly used for mounting the present embodiment.

In order to complete the structure of the center connector assembly, the housings 17A and 17B of the individual pin-side coaxial connector assemblies are fixed by a center connector assembly forming frame 28.

In the present embodiment, the contact piece 2 is provided on the housing 17A or 17B of the pin-side coaxial connector assembly. However, a similar shape may be formed by press molding.

An electronic circuit package A21 or B2 fitted with the multi-core coaxial center connector assembly
FIG. 12 shows an example of the shape of the pin-side coaxial connector assembly 18 and the socket-side coaxial connector assembly 19 whose central conductors are sockets, which are mounted on the connector 2. Both assemblies 1
8 and 19 use the same thing. The individual socket-side coaxial contacts 6 are arranged with the same dimensions as the pitch of the pin-side coaxial connector assembly 18 and are held by the socket-side coaxial connector housing 20.

The processing of the terminal portion of the coaxial connector assembly mounted on the electronic circuit package A or B may be any processing as long as the wiring is formed in a pattern on a printed circuit board. 27 is a center connector assembly.

FIG. 13 is a sectional view showing a fitted state of the present embodiment. Two twin contact pieces 2 in the figure are in contact with the outer conductor 16 of the socket-side coaxial contact 6 of the socket-side coaxial connector assembly 19. In order to maintain the shielding effect of the center conductor, the insulator 4a is slightly retracted in the opening 10 of the coaxial pin contact, and the mating socket-side coaxial contact 6 enters the bar.

FIGS. 14 to 17 are views for explaining a fourth reference example of the present invention. FIG. 14 is a perspective view of a mounting image of a perpendicular printed circuit board. In this embodiment, a coaxial connector assembly having 16 coaxial contacts per electronic circuit package is used. FIG. 15 is a single perspective enlarged view of a coaxial center connector assembly in which a center conductor is a pin. In FIG. 15, a metal bar (bar) serves as a housing 17 of a pin-side coaxial connector assembly that constitutes a center connector assembly, and has twin contact pieces 2 formed therein. The contact pieces 2 are arranged at equal intervals on the bar. The contact pieces 2 are arranged on both sides of the bar.
A through hole 3 is formed at the same position as the contact piece 2 at the center of the bar, and an insulator 4 and a pin contact 5 are arranged there. The twin contact piece 2 comes into contact with the outer conductor 16 of the socket-side coaxial contact 6 and functions as an outer conductor. The through-hole 3 in which the insulator 4 is incorporated forms a small counterbore space z (the insulator is slightly retreated). Thus, the center connector unit 29 used for mounting the present embodiment is configured.

FIG. 14 shows an example of the shape of the socket-side coaxial connector assemblies 19A and 19B which fit into the center connector unit 29 and whose central conductor is a socket. The individual socket-side coaxial contacts 6 are arranged at the same pitch as the pitch of the pin-side coaxial connector, and are held by the housing 20 of the socket-side coaxial connector. The socket-side coaxial connector assemblies 19A and 19B have exactly the same shape.

Socket side coaxial connector assembly 19
The processing of the terminal portions of the connectors A and 19B may be a through-hole, a surface mount, or any other method as long as the shape is wired to the pattern of the printed circuit board.

FIG. 16 is a sectional view showing a fitted state of a multi-core coaxial connector according to a fourth reference example of the present invention. Two twin contact pieces 2 in the figure are in contact with the outer conductor 16 of the socket-side coaxial contact 6. In order to maintain the shielding effect of the center conductor, the insulator 4a is slightly retracted in the opening 10 of the coaxial pin contact, and the mating socket-side coaxial contact 6 enters the housing 17 of the pin-side coaxial connector assembly.

FIG. 17 is an overall view and a partially cutaway perspective view of the fourth embodiment of the present invention applied to three-dimensional mounting.
A large number of housings 17 of the pin-side coaxial connector assemblies are arranged in parallel, and the housings 17 of the individual pin-side coaxial connector assemblies are fixed by a center connector assembly forming frame 28. The center connector unit 30 thus completed is mounted on the electronic circuit package housing unit frame 23, and the electronic circuit package A21 or B22 is incorporated through the two unit openings to constitute an electronic device.

FIGS. 17 to 20 are schematic views of a fifth reference example of the present invention. Electronic circuit package A21 or B2
2 are provided with cutouts 31 on both sides, and windows 32 are opened on the surface of the electronic circuit package housing unit frame 23 corresponding to the cutouts 31. Electronic circuit package A21 or B22 into electronic circuit package housing unit frame 23
When the fixing member 33 is attached to the window 32 after all of the electronic circuit packages A21 and B22 are assembled, all of the electronic circuit packages A21 or B22 incorporated in the electronic circuit package housing unit frame 23 are fixed and do not come off.

To remove the electronic circuit package A21 or 22B from the electronic circuit package housing unit frame 23, the window 3 of the electronic circuit package housing unit frame 23 is required.
By operating the tool 34 from 2, the electronic package A 21 or B 22 can be pulled out.

FIGS. 21 to 23 show a sixth reference of the present invention.
An example will be described. FIG. 21 shows an electronic circuit pack provided with a guide structure.
Schematic diagram of the package, showing the plug-side coaxial connector
This is applied to the structure of the assembly. Electronic circuit pack
The cage 12 includes a plug-side coaxial connector assembly 8,
A metal guide frame A35 and a guide frame B36 are mounted.
You. Housing of plug side coaxial connector assembly 8
Ends, guide frame A35 and guide frame B36
When assembling to the front 12
W ± ΔW₁To determine. Electronic circuit package for each component
12 may be used for the purpose or purpose of the electronic circuit package.
Can be done in any way as long as the specifications are met.
No. 21 and 22, the electronic circuit package 1
The tolerance ΔW in the present reference example for the total width W of 2₁, Information frame
The tolerance in the electronic circuit package 21 having no tolerance is ΔW₂
The electronic circuit package provided with the guide frame
In the case of Di 12, ΔW₁Smaller
ΔW ₁<ΔW₂To do
To improve the dimensional accuracy of the electronic circuit package.
You.

Next, an embodiment of the present invention will be described with reference to FIG. FIG. 1A is a perspective view showing a schematic structure of a terminal portion (connecting portion) of the substrate of the coaxial connector contact, and FIG. This is applied to the structure of FIG. A signal lead 37 is provided on the electronic circuit package 12.
And a ground metal piece 38 are arranged. The ground metal piece 38 is connected to the outer conductor component of the coaxial contact (regardless of its means). The signal lead 37 on the electronic circuit package 12 is connected to a signal terminal 39, while the ground metal piece 38 is
The electronic circuit package 12 is arranged in a shape surrounding three sides other than the plane portion, and is connected to a ground via a ground terminal 40 formed on the electronic circuit package 12. The signal lead 37 is disposed so as to protrude by ΔL from the ground metal piece 38. Therefore, this portion has a pseudo coaxial structure whose impedance is adjusted. Accordingly, the coaxial connector is terminated at this point to the signal terminal 39 and the ground terminal 40 on the electronic circuit package 12 and is connected to the circuit pattern on the electronic circuit package 12.

[0044]

As is apparent from the above description, the present invention has the following advantages.

The connection between the coaxial connector contact and the printed circuit board has a pseudo-coaxial structure, and the impedance is adjusted over the entire connector including this portion, whereby improvement in transmission characteristics can be expected.

Since the thin signal leads protrude from the ground metal piece and are arranged on the substrate terminal,
At the time of lead connection work, for example, workability of soldering is improved. Further, confirmation and inspection after soldering can be easily performed.

[Brief description of the drawings]

FIGS. 1A and 1B show a schematic structure of a board terminal portion (connection portion) in a coaxial connector contact for a printed board according to an embodiment of the present invention, wherein FIG. 1A is a perspective view and FIG.

FIG. 2 is a partially broken perspective view of a pin-side coaxial connector assembly according to a first reference example of the present invention.

FIG. 3 is a perspective view assuming a state in which a pin-side coaxial connector assembly is mounted on a rack unit in the first reference example of the present invention.

FIG. 4 is a perspective view showing an image when an electronic device is configured via a backboard according to the first reference example of the present invention.

FIG. 5 is a sectional view showing a fitted state of the first reference example of the present invention.

FIG. 6 is a perspective view of a mounting image of orthogonal printed circuit boards in a second reference example of the present invention.

FIG. 7 is an enlarged perspective view, partially broken away, of the pin-side coaxial connector assembly, taken along circle A in FIG. 6;

FIG. 8 is a partially cutaway perspective view of an electronic device when the second reference example of the present invention is applied to a three-dimensional mounting structure.

FIGS. 9A and 9B are cross-sectional views illustrating a fitted state of a joint portion of a coaxial connector according to a second reference example of the present invention, in which FIG. 9A is a state cut in parallel to one electronic circuit package, and FIG. 2 shows a state cut in parallel with the electronic circuit package.

FIG. 10 is a perspective view of a mounting image of orthogonal printed circuit boards in a third reference example of the present invention.

FIG. 11 is an enlarged perspective view, partially broken away, of the pin-side coaxial connector assembly in FIG. 10;

FIG. 12 is a partially cutaway perspective view of an electronic device when a third reference example of the present invention is applied to a three-dimensional mounting structure.

FIG. 13 is a cross-sectional view illustrating a fitted state of a joint portion of a coaxial connector according to a third reference example of the present invention.

FIG. 14 is a perspective view of a mounting image of orthogonal printed circuit boards in a fourth reference example of the present invention.

FIG. 15 is a partially cutaway enlarged perspective view of the pin-side coaxial connector assembly shown in FIG. 14;

FIG. 16 is a cross-sectional view illustrating a fitted state of a joint portion of a coaxial connector according to a fourth reference example of the present invention.

FIG. 17 is a partially cutaway perspective view of an electronic device when the fourth reference example of the present invention is applied to a three-dimensional mounting structure.

FIG. 18 is a perspective view showing a fifth reference example of the present invention.

FIG. 19 is a schematic view showing a cross section of a substrate and a fixing member when an electronic circuit package is fixed in a fifth reference example of the present invention.

FIG. 20 is a schematic diagram showing a state when an electronic circuit package is operated (detached) in a fifth reference example of the present invention.

FIG. 21 is a plan view of an electronic circuit package guide structure according to a sixth reference example of the present invention.

FIG. 22 is a plan view of an electronic circuit package having no guide frame according to a sixth reference example of the present invention.

FIG. 23 is a sectional view of an electronic circuit package guide structure and an electronic circuit package housing unit frame according to a sixth reference example of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Metal bar (bar) 2 Contact piece (contact) 3 Through hole 4, 4a, 4b Insulator 5 Pin (pin contact) 6 Socket side coaxial contact 7 Receptacle coaxial connector assembly 8 Plug coaxial connector assembly 9 Plug coaxial connector Housing 10 Coaxial pin contact opening 11 Printed circuit board (backboard) 12 Electronic circuit package 13 Receptacle side center conductor terminal (for backboard) 14 Receptacle side external conductor terminal (for backboard) 15 Socket contact 16 External conductor 17, 17A , 17B Pin-side coaxial connector assembly housing 18 Pin-side coaxial connector assembly 19, 19A, 19B Socket-side coaxial connector assembly 20 Socket-side coaxial connector housing 21 Electronic circuit package A 2 Electronic Circuit Package B 23 Electronic Circuit Package Housing Unit Frame 24 Frame 25 Joint of Coaxial Connector with Electronic Circuit Package Boat of Central Conductor Terminal 26 Joint of External Coaxial Connector with Electronic Circuit Package Boat of Coaxial Connector 27 Center Connector assembly 28 Center connector assembly configuration frame 29 Center connector unit 30 Center connector unit 31 Notch 32 Window 33 Fixing member 34 Tool 35 Guide frame A 36 Guide frame B 37 Signal lead 38 Ground metal strip 39 Signal terminal 40 Ground Terminal

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takao Suzuki 1-21-2 Dogenzaka, Shibuya-ku, Tokyo Japan Aviation Electronics Industry Co., Ltd. (72) Inventor Fuminori Ishizuka 3-19-2 Nishishinjuku, Shinjuku-ku, Tokyo No. Within Nippon Telegraph and Telephone Corporation (72) Inventor Noboru Iwasaki 3-19-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Naoya Kugutsu 3-19, Nishi-Shinjuku, Shinjuku-ku, Tokyo No. 2 Inside Nippon Telegraph and Telephone Corporation (72) Inventor Yasuhiro Ando 3-19-2 Nishishinjuku, Shinjuku-ku, Tokyo Nippon Telegraph and Telephone Corporation

Claims (1)

[Claims] A ground structure is formed by a structure surrounding signal terminals on three sides other than a plane portion of a substrate, and a signal lead disposed on a surface of the substrate is projected from the ground structure to terminate the printed circuit board. A coaxial connector contact for a printed circuit board.