JP3252258B2 - Board-in coaxial connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a board-in coaxial connector, and more particularly, to a coaxial connector used to connect a coaxial cable to a board.

[0002]

2. Description of the Related Art A conventional example of a board-in coaxial connector is shown in FIG.
It was shown to. The board-in coaxial connector 11 includes a substantially cylindrical conductive body 13, an insulating insulator 12 provided inside the body 13, a conductive sleeve 14 attached to the body 13, and an outside of the sleeve 14. , A conductive center contact 18 fixed to a substantially central portion of the insulator 12, and a cap 19 for closing an opening of the body 13.
It is composed of

In this conventional board-in coaxial connector 11, the center conductor 7a of the coaxial cable 7 is inserted through the sleeve 14 and the body 13, and the outer braid 7c of the coaxial cable 7 is put on the sleeve 14, and the outer braid 7c is ferruled. The outer braid 7c is crimped to the sleeve 14 with the cover 15. Next, the center conductor 7a of the coaxial cable 7 is soldered to the center contact 18, and the cap 1 is soldered after the soldering.
Harness of the coaxial cable is performed by the procedure of covering the body 9 with the body 9.

As described above, when the board-in coaxial connector 11 in which the harness of the coaxial cable is completed is mounted on a board (not shown), the center contact 18 and the terminal portion 20 on the outer periphery thereof are connected to, for example, through holes of the board. Connected by soldering. Thereby, the coaxial cable 7 is connected to the board via the board-in coaxial connector 11.

[0005]

However, the above-mentioned conventional board-in coaxial connector has a structure in which the center conductor of the coaxial cable is connected to the center contact by soldering, so that the structure tends to be complicated, and the components are also complicated. Many points. Further, since a soldering process is required, workability in harnessing is poor. In addition, there is a problem that the cost is increased. Furthermore, the complicated structure makes it difficult to keep the height low, and it is difficult to make a short type.

Furthermore, since the structure is such that the center contact is connected to the center conductor of the coaxial cable, the electrical length up to the substrate is increased. For this reason, there is a problem that reflection easily occurs due to the structure, which adversely affects the transmission characteristics of signals and the like in the coaxial cable.

The present invention provides a board-in coaxial connector which has a simple structure, can be kept low in height, has good workability of a harness, and has good signal transmission characteristics in a coaxial cable. That is the task.

[0008]

SUMMARY OF THE INVENTION A board-in coaxial connector of the present invention is a board-in coaxial connector for mounting a coaxial cable on a board and connecting the coaxial cable to the board. While holding
In a board-in coaxial connector including a body having conductivity and connected to a conductor pattern of the substrate, the insulator has first and second through holes, and a first slit, and the body includes: Having a second slit,
The first through-hole extends in a direction intersecting with a direction orthogonal to the mounting surface of the board, and is a portion through which a center conductor of the coaxial cable is inserted. The second through-hole includes: A portion that intersects the first through hole in a direction perpendicular to the mounting surface and passes the center conductor to the substrate, wherein the first slit has a width smaller than an outer diameter of the center conductor. Having an opening on the outer surface of the insulator, communicating the first through-hole and the second through-hole with each other, and forming a part of the central conductor inserted through the first through-hole. The second slit is connected to the first slit and opens at an outer surface of the body, and the second slit is connected to the first slit. The center conductor protruding from the slit of Characterized in that it is a part to protrude from the outer surface of the body.

Here, in a preferred embodiment, the first through hole and the second through hole are orthogonal to each other. A conductive sleeve is mounted on the body for receiving the center conductor and an insulator covering the center conductor and being inserted between the insulator and an outer braid covering the insulator.

That is, the board-in coaxial connector of the present invention has a structure in which the center contact is removed from the conventional structure and the center conductor of the coaxial cable is directly connected to the substrate. In this case, the center conductor is appropriately bent.

[0011]

Embodiments of the present invention will be described below.

Referring to FIGS. 1 to 3, a board-in coaxial connector 1 according to an embodiment of the present invention includes an insulator 2, a body 3, a sleeve 4, and a ferrule 5, and includes a printed circuit board. 6 is mounted on a mounting surface 6 a of the PC 6, and is for connecting a coaxial cable 7 to the printed circuit board 6.

The sleeve 4 and the ferrule 5 are arranged as shown in FIG.
Are the same as the sleeve 14 and the ferrule 15 described above. The coaxial cable 7 has a conductive center conductor 7.
a, an insulator 7b made of synthetic resin, an outer braid 7c made of a metal wire, and an insulating jacket 7 made of synthetic resin
d.

The insulator 2 is substantially cylindrical and made of an insulating material. And insulator 2
Is a first through-hole 2 penetrating radially in the upper part thereof.
a, a second through hole 2 penetrating from the upper end to the lower end thereof
b, and a first slit 2c formed on a side thereof.

The first through hole 2a is formed on the mounting surface 6a of the substrate 6.
And extends in a direction intersecting a direction y orthogonal to. The crossing angle is preferably 90 °, but in principle, it may be larger than 0 ° and smaller than 180 °. The first through hole 2a is provided with a central conductor 7a of the coaxial cable 7.
Is a part through which the. Also, the second through-hole 2b is
It is formed in a direction perpendicular to the mounting surface 6a of the substrate 6, and crosses the first through hole 2a at right angles. This second
The through hole 2b functions as a portion for passing the central conductor 7a of the coaxial cable 7 to the substrate 6.

The first slit 2c has a width smaller than the outer diameter of the center conductor 7a of the coaxial cable 7,
It is open on the outer surface of the insulator 2. The first slit 2c connects the first through-hole 2a and the second through-hole 2b to each other, and allows a part of the center conductor 7a inserted into the first through-hole 2a to be connected to the second through-hole 2b. Function as a part that can be moved to the place.

The body 3 has a substantially cylindrical shape made of a conductive material. The body 3 has a second slit 3a formed on one side thereof, a plurality of terminal portions 3b protruding downward, a concave portion 3c for housing the insulator 2, and a mounting hole 3d for mounting the sleeve 4. ing.

The second slit 3a is connected to the first slit 2
c and opens on the outer surface of the body 3. The second slit 3a functions as a portion for projecting the center conductor 7a projecting from the first slit 2c from the outer surface of the body 3.

The sleeve 4 has a substantially cylindrical shape made of a conductive material. The sleeve 4 receives the central conductor 7a of the coaxial cable 7 and the insulator 7b covering the central conductor 7a. And sleeve 7
Is inserted between the insulator 7b and the outer braid 7c. Further, the sleeve 4 is attached to the mounting hole 3d of the body 3.

Next, the procedure for assembling the board-in coaxial connector of this embodiment, that is, the step of harnessing the coaxial cable 7, will be described with reference to FIG.

First, as shown in FIG. 4A, the center conductor 7a and the insulator 7b of the coaxial cable 7 having the center conductor 7a and the outer braid 7c exposed as shown are inserted into the sleeve 4. Then, as shown in FIGS. 4B to 4C, the center conductor 7a is passed straight through the first through hole 2a of the insulator 2.

Next, as shown in FIG. 4D, a portion of the center conductor 7a of the coaxial cable 7 protruding from the first through hole 2a is bent downward in the figure. Then, the bent portion passes through the first slit 2c of the insulator 2 and the second slit 3a of the body 3 and enters the second through hole 2b of the insulator 2.

The first and second through holes 2a, 2b have a diameter greater than the diameter of the central conductor 7a of the coaxial cable 7.
Thereby, the insertion work of the center conductor 7a can be easily performed. Also, the second slit 2 of the insulator 2
By setting c to a width smaller than the diameter of the center conductor 7a of the coaxial cable 7, the center conductor 7a after bending can be held in the second slit 2c. Finally, by attaching the ferrule 5 to the outer periphery of the coaxial cable 7, the harness of the coaxial cable 7 is completed.

A procedure for soldering and mounting the board-in coaxial connector 1 in which the coaxial cable 7 is harnessed to the printed circuit board 6 will be described with reference to FIG.

After the harness, the end of the center conductor 7a of the coaxial cable 7 projects from the lower end of the board-in coaxial connector 1, and this portion is inserted into the through hole 6b of the board 6 and soldered thereto. The outer braid 7c, which is the outer conductor of the coaxial cable 7, is connected to the board 6 via the body 3 by soldering the terminal 3b of the body 3 of the board-in coaxial connector 1 to the through hole 6c of the board 6. Is done.

[0026]

According to the board-in coaxial connector of the present invention,
Since the center contact in the conventional structure is omitted and the center conductor of the coaxial cable is directly connected to the substrate instead, the number of components is reduced and the structure is simplified as compared with the conventional structure. Therefore, cost can be reduced and the height of the connector can be reduced.

Further, since the work of soldering in the case of the harness which is required in the conventional structure is eliminated, the workability in the case of the harness of the coaxial cable is improved. Further, since the coaxial cable can be directly connected to the board, the signal transmission characteristics of the coaxial cable can be improved.

[Brief description of the drawings]

1A and 1B show a board-in coaxial connector according to an embodiment of the present invention, wherein FIG. 1A is a plan view, FIG. 1B is a partially cutaway front view showing a state of being soldered to a substrate, and FIG. FIG. 2D is a bottom view, and FIG. 2D is a cross-sectional view taken along line AA in FIG.

FIGS. 2A and 2B show an insulator constituting the board-in coaxial connector of FIG. 1, wherein FIG. 2A is a plan view and FIG.
Is a left side view, (c) is a front vertical sectional view, and (d) is a right side view.

3 (a) is a plan view, FIG. 3 (b) is a left side view, FIG. 3 (c) is a front vertical sectional view, and FIG. 3 (d) is a right side view. FIG.

4 (a) to 4 (d) are explanatory diagrams of a cable harness procedure of the board-in coaxial connector of FIG.

FIG. 5 is a longitudinal sectional view of a conventional board-in coaxial connector.

[Description of Signs] 1 Coaxial connector 2 Insulator 2a First through hole 2b Second through hole 2c First slit 3 Body 3a Second slit 3b Terminal 3c Depression 4 Sleeve 5 Ferrule 6 Printed circuit board 6a Mounting surface 6b Through hole 6c Through hole 7 Coaxial cable 7a Center conductor 7b Insulator 7c Outer braid 7d Outer jacket

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Nobuhiro Kawashima 300-18 Toyohara, Motohara, Kamikawa-cho, Kodama-gun, Saitama Prefecture Within Saitama NEC Corporation (58) Field surveyed (Int.Cl. ⁷ , DB name) H01R 9/05 H01R 24/02

Claims (3)

(57) [Claims] 1. Mounted on a substrate (6), said substrate (6)
1. A board-in coaxial connector (1) for connecting a coaxial cable (7) to an insulator (2), the insulator (2) holding the insulator (2), and having conductivity and a conductor of the substrate (6). A board-in coaxial connector (1) including a body (3) connected to a pattern, wherein the insulator (2) includes first and second through holes (2a, 2b), and a first slit (2c). The body (3) has a second slit (3a), and the first through hole (2a) is arranged in a direction orthogonal to a mounting surface (6a) of the substrate (6). And a central conductor (7a) of the coaxial cable (7).
The second through hole (2b) intersects with the first through hole (2a) in a direction orthogonal to the mounting surface, and connects the center conductor (7a) to the substrate ( 6), wherein the first slit (2c) is connected to the central conductor (7a).
The insulator (2) having a width smaller than the outer diameter of the insulator (2);
Opening at the outer surface of the first through-hole (2a)
And the second through hole (2b) are communicated with each other, and the center conductor (7) inserted into the first through hole (2a) is
The second slit (3a) communicates with the first slit (2c) while allowing a portion of a) to be moved to the second through hole (2b). An opening on the outer surface of the body (3), the central conductor (7a) projecting from the first slit (2c) projecting from the outer surface of the body (3). Board-in coaxial connector (1). 2. The board-in coaxial connector (1) according to claim 1, wherein said first through hole (2a) and said second through hole (2b) are orthogonal to each other. 3. An outer braid (7c) for receiving the center conductor (7a) and an insulator (7b) covering the center conductor (7a), and covering the insulator (7b) and the insulator (7b). The board-in coaxial connector (1) according to claim 1 or 2, wherein a conductive sleeve (4) inserted between them is attached to the body (3).