JPH0735329Y2 - Mounting structure for coaxial type connector - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an improvement in the mounting structure of a coaxial connector, particularly a coaxial connector (high frequency coaxial connector) of an RF modulator mounted on a VTR.

[Conventional technology]

Conventionally, the mounting structure of the coaxial connector of the above RF modulator is shown in FIGS. 3 to 8. Fig. 3 is a perspective view showing the appearance of the RF modulator, Fig. 4 is the same sectional view, Fig. 5 is the bottom view of the center contact of the female connector, and Fig. 6 is the center contact of the male connector. A bottom view and FIG. 7 are sectional views showing the mounting structure of the female connector seat in an enlarged manner, and FIG. 8 is a bottom view showing the center contact in an enlarged manner.

The RF modulator 1 has a box-shaped metal frame body 2 whose rear surface is open. Shield covers 3a and 3b are attached to the front surface and the back surface of the frame body 2 to function as a shield. There is. A female connector seat 4 and a male connector seat 5 are fixed to the surface side of the frame body 2, and each connector seat 4 and 5 has shells 4a and 5a which serve as outer conductors. The center contact 4c, 5c is provided inside the 5a via the insulating resin 4b, 5b. The center contact 4c, 5c is integrally extended into the frame body 2 to form a flat plate-shaped extension 4d or a circle. Pin-shaped extensions 5d are formed. The ends of the extensions 4d and 5d are inserted into the through holes 7a and 7b formed in the printed circuit board 7 fixed to the inner surface of the side wall of the frame 2 with solder 6a and 6a. It is inserted and fixedly connected to the circuit pattern (earth circuit) 7c of the copper foil provided on the back surface of the printed circuit board 7 by solders 6b and 6c. The surface of the printed circuit board 7 serves as a mounting space for the electronic components 8 and 8.

Further, as shown in an enlarged view in FIG. 7, the fixing of the connector seats 4 and 5 to the frame body is performed by caulking the base portion 4A of the shell 4a, and the shell 4a is further attached to the frame body 2a. Inward
4e is formed and extended, and the step 4e and the projections 4f and 4f formed by half punching are integrated with the insulating resin 4b.

The mounting structure of the plug seats 4 and 5 of the RF modulator 1 is conventionally as described above, and the RF modulator 1 is assembled by exposing the plug seats 4 and 5 to the back of the VTR and receiving the television from the antenna. This is used as a signal input terminal and an output terminal for a modulated signal to the television, and the user of the VTR will be required to insert and remove the plug from the connector seats 4 and 5.

[Problems to be solved by the device]

However, according to the conventional mounting structure of the coaxial type connector seat, the work force is applied not only in the axial direction of the connector seats 4 and 5 but also in the intersecting direction when the plug is inserted and removed (F), This force F is applied not only to the shell 4a but also to the center contact
It is also added to 4c (f). Then, the force F · f in the crossing direction is concentrated on the fixing portion between the contact plug seats 4 and 5 and the frame body 2, and the caulking (or soldering) connection is likely to be broken.

The present invention has been made by paying attention to the problems of the related arts described above. By solving these problems, the force in the crossing direction applied to the fixed portion between the shell and the frame is reduced, and the mounting strength is improved. It is an object of the present invention to provide a mounting structure for a coaxial connector, which can withstand rough handling.

[Means for Solving the Problems]

In order to achieve this object, the mounting structure of the coaxial connector according to the present invention is mounted outside the frame by fixing the base of the shell and mounting it inside the shell via an insulator. In the mounting structure of the coaxial connector, the extension portion extending into the frame is integrally formed with the center contact, and the tip of the extension portion is soldered to the circuit pattern of the printed circuit board. It is characterized in that the insulator is extended to the vicinity of the printed circuit board and the tip of the center contact extension is U-shaped in cross section.

[Action]

Due to the above structure, the force applied to the center contact other than the shell is transmitted to the extension part of the center contact through the extended insulating resin, and is supported by the mounting part by soldering the extension part and the printed circuit board. As a result, the force applied to the fixed joint between the shell base and the frame is reduced. Also, by making the extension part U-shaped in cross section,
The stress is strengthened so that the bearing can be sufficiently endured.

〔Example〕

Next, an embodiment of the present invention will be described in detail with reference to FIGS. The same parts as those of the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 is an enlarged cross-sectional view showing a mounting structure of a female connector seat embodying the present invention, and FIG. 2 is a bottom view showing a shape of an extension portion. In these figures, 10 indicates a female connector.
The shell 11 of the female plug seat 10 is fixed to the metal frame 2 by caulking the base 11A. Also shell 11
A center contact 13 is provided inside via an insulating resin 12. Further, the shell 11 is extended into the frame body 2 by forming a step 11a, and the step 11a and the projections 11b and 11b formed on the extended part are integrated with the insulating resin 12. There is. The insulating resin 12 is further integrally formed with a substantially conical extension 12a which is tapered toward the printed circuit board 7, and the extension 13a of the center contact 13 is inserted into a substantially central portion of the extension 12a. There is. The extension 13a has its tip inserted through an insertion hole 7a formed in the printed circuit board 7, and is fixedly connected by a solder foil 6b to a copper foil circuit pattern (earth circuit) 7c provided on the back surface of the printed circuit board 7. Has been done. Further, the extension 13a has a U-shaped cross section from approximately the middle to the tip.

The mounting structure of the coaxial connector according to this embodiment is configured as described above. Therefore, the force applied to the center contact 13 other than the shell 11 so as to intersect with the axial direction of the female connector seat 10 is an extension part formed in a U-shaped cross section of the center contact 13 via the extension part 12a of the insulating resin 12. The force applied to 13a is supported by the fixed connection portion by the solder 6b, and the load on the crimped base portion 11A of the shell 11 is reduced.

Although this embodiment has been described with respect to the female connector (F type connector), it can be similarly applied to the male connector (M type connector), and the shape of the extension 12a of the insulating resin 12 is If the electronic parts can be arranged in a space and the cost of materials can be allowed, it is possible to use not only a conical shape but also a columnar shape or the like.

[Effect of device]

As described above, according to the mounting structure of the coaxial type connector according to the present invention, the force applied to the center contact is supported by the fixed connection portion between the center contact extension and the printed circuit board, so that the shell and the frame body are supported. The load on the fixed part with is reduced. In addition, since the center contact extension also has a U-shaped cross section and is strong against stress, the mounting strength as a whole is greatly improved and it is possible to endure even rougher handling.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view showing the mounting structure of the female connector seat according to the present invention, FIG. 2 is a bottom view showing the shape of the center contact extension, and FIG. 3 is a perspective view showing the appearance of the RF modulator. , FIG. 4 is a sectional view showing the conventional example, FIG. 5 is a bottom view showing a center contact extension of the female connector, and FIG. 6 is a bottom view showing a center contact extension of the male connector. FIG. 7 is an enlarged cross-sectional view showing the mounting structure of the female connector seat, and FIG. 8 is an enlarged bottom view showing the center contact extension portion. 2 ... frame, 7 ... printed circuit board, 6b ... solder 7c ... circuit pattern, 10 ... female connector 11 ... shell, 11A ... shell base 12 ... insulator, 12a ... Extension 13 …… Center contact 13a …… Center contact extension

Claims (1)

[Scope of utility model registration request] 1. A center contact provided by projecting to the outside of a frame body so as to fix a base portion of a shell, and provided inside the shell via an insulator has an extension portion extending into the frame body. In a mounting structure of a coaxial type connector, in which the tip of the extension is soldered to a circuit pattern of a printed circuit board, the insulator is extended to the vicinity of the printed circuit board, and A coaxial type connector mounting structure, characterized in that the tip of the center contact extension is U-shaped in cross section.