JPH0113335Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a connector, and more specifically, to a BNC type coaxial connector suitably used for connecting high frequency cables.

As shown in Figure 1, the conventionally used BNC coaxial cable has an insulator 2 inside the conductive shell 21' that is connected to the conductive shell of the plug.
The center contact 23' is provided so as to be slidable in the axial direction via the center contact 2'.
A coil spring 30' is provided to urge the plug 3' toward the plug insertion end side (to the right in the figure), and a break terminal 25' is provided at a predetermined position on the inner surface of the insulator 22'. Reference numeral 50 denotes a contact portion formed at a predetermined position of the center contact 23', and is brought into contact with the break terminal 25' by being moved toward the plug insertion end side by the coil spring 30'. Further, the center contact 23' has a forked tip (on the right side in the figure) to grip the pin of the plug. Further, the left end of the center contact 23' is connected to a printed circuit board or the like inside the electronic device using a lead wire.

With the above configuration, when the plug is inserted into the receptacle and the conductive shells of both are electrically connected, the center contact 23' engaged with the pin of the plug moves to the left in the figure, and the center contact 23' is moved to the left in the figure. When the contact 23' and the break terminal 25' are electrically disconnected and the plug is removed, the coil spring 30' moves the center contact 23' to the right in the figure and closes the center contact 23'. An electrical connection can be established between the break terminal 25' and the break terminal 25'. In other words, various requirements for a BNC type connector can be satisfied.

However, when connecting the center contact 23' to a printed circuit board, etc., the center contact 23'
While 3' moves when inserting and removing the plug,
Since the printed circuit board, etc. is mounted in an immovable manner, it is not possible to directly connect the two, and a lead wire must be used to connect the two, which poses the problem of poor soldering workability. be. Also, the pin of the plug and the center contact 23'
Since the center contact 23' is moved by engaging the forked portion 36' of the switch, there is a slight problem in the stability of switching.

This invention was made in view of the above problems, and it can improve the workability of soldering, and
The purpose of the present invention is to provide a connector with excellent switch switching stability.

The connector of this invention to achieve the above purpose includes a plug in which a pin is provided with an insulator interposed inside a conductive shell, and a conductive shell that is electrically connected to the conductive shell. and a receptacle provided with a center contact that is electrically connected to the pin with an insulator interposed inside the receptacle, the connector being supported with an insulator interposed inside the conductive shell of the receptacle, and A break spring is provided that elastically contacts the center contact, and a cover is provided that moves as the plug is inserted to separate the center contact and break spring.Furthermore, when the plug is removed, the cover returns to the center contact and the break spring. It is characterized by the provision of a coil spring that makes contact with the spring.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.

FIG. 2 is a perspective view of the connector, FIG. 3 is an exploded perspective view of the receptacle, and FIG. 4 is a longitudinal sectional view, each of which is composed of a plug 1 and a receptacle 2.

The plug 1 is provided with a pin 13 inside a cylindrical metal shell 11 with an insulator 12 interposed therebetween. It is centrally located. A connecting shell 14 is rotatably provided on the outer periphery of the metal shell 11, and substantially L-shaped grooves 15, 15 for coupling with the receptacle 2 are formed at predetermined positions of the connecting shell 14.

The receptacle 2 is provided with a central contact 23 and a break spring 25 with an insulator 22 interposed inside a metal shell 21 into which the metal shell 11 can be tightly fitted, and further moves following insertion of the plug 1. A cover 26 made of an insulating material is provided to separate the center contact 23 and the break spring 25 from each other. And metal shell 2
Protrusions 24, 24 for coupling with the plug 1 are provided on the outer surface of the plug 1 on the plug 1 insertion side. More specifically, the metal shell 21 has a mounting flange 27 and a male screw 28 on the outer periphery of its central portion, and the outer wall plate of the electronic device is held between the nut attached to the male screw 28 and the flange 27. I can do it. Note that 29 is a holding piece for holding the insulator 22.

The insulator 22 has an outer diameter that allows the coil spring 30 to be accommodated between it and the metal shell 21, and has a plurality of protrusions 31, 31 on the outer surface of the tip (right side in the figure). A square hole 3 having a square hole 32 in the center thereof through which the center contact 23 can be inserted, and supporting the break spring 25 so as to be movable in the radial direction in continuity with the square hole 32.
3, and a square hole 32 on the opposite side to the square hole 33.
It has a circular hole 34 that guides the cover 26 in continuity with the cover 26. A flange portion 35 is formed outwardly at the base end portion (left side in the figure) of the insulator 22, and this flange portion 35 serves as a receiving portion for the coil spring 30.

The central contact 23 is made of a flat metal plate and has a forked tip so that the pin 13 of the plug 1 can be received by the forked portion 36. Then, a stopper 37 that engages with the bottom of the circular hole 34 and a stopper 37' that engages with the base end of the insulator 22 are formed by pulling out and raising the central portion at a predetermined position, and further bent at a substantially right angle on the outside of the protrusion. This allows easy soldering to printed circuit boards.

The break spring 25 is connected to the center contact 23
It is made of a metal plate having spring characteristics with a slightly narrower width, is bent inside the square hole 33 so that it can come into contact with the center contact 23, and its tip is curved in a direction away from the center contact 23. By bulging the portion 39 toward the center contact 23 side, contact between the center contact 23 and the break spring 25 is ensured.
Reference numeral 38 is a stopper for preventing the tool from coming off when it is pulled out.

The cover 26 has a small diameter portion 40 inserted into the insulator 12 of the plug 1 and the insulator 22 of the receptacle 2.
The large diameter portion 40' is fitted into the large diameter portion 40'.
0' is formed with a protrusion 41 that engages with the circular hole 34 and the center of the forked part 36 of the central contact 23, and this protrusion 41 engages with the curved part 39 of the break spring 25. By connecting the break spring 25 to the central contact 23
A tapered portion 24 is formed to separate the portion from the tip.
The small diameter portion 40 has a hole 43 through which the forked portion 36 of the central contact 23 and the pin 13 of the plug 1 can be inserted, and the large diameter portion 40' has a hole 43 formed therein.
Window holes 44, 44 are formed to engage with the protrusions 31, 31 of the insulator 22 to enable sliding a predetermined distance, and a groove 4 is provided to provide spring characteristics.
5,45 are formed.

With the above configuration, when the plug 1 is removed, the cover 26 is slid by the coil spring 30, and the curved part 39 of the break spring 25 and the tapered part 42 of the cover 26
are separated, and the break spring 25 and center contact 23 are maintained in an electrically connected state (fourth
(see figure).

In addition, when the plug 1 is inserted, the pin 13 enters the hole 43 of the cover 26, and then the cover 26 is slid to the left against the coil spring 30, so that the pin 13 is inserted into the forked portion 36. While being electrically connected to the center contact 23, the taper portion 42 engages with the curved portion 39, whereby the break spring 25 and the center contact 23 are held in an electrically disconnected state (fifth
(see figure). In this case, the grooves 15, 15 and the protrusions 24, 24 engage to hold the plug 1 in the inserted state.

As is clear from the above description, in this embodiment, regardless of whether the plug 1 is inserted or removed, the center contact 23
Since the center contact 23 does not slide at all, the center contact 23 can be directly soldered to a printed circuit board, etc., simplifying the soldering work, and the case 26 can be moved without moving the center contact 23. Since the switching operation is thereby performed, the stability of switching is excellent.

FIG. 6 is a longitudinal sectional view showing another embodiment, and the difference from the above embodiment is that the circular hole 46 of the insulator 22
A shaft 47 is provided in place of the large diameter portion 40, and a coil spring 3 is provided on the outer periphery of the shaft 47.
Since it is only the point where 0 is inserted, it functions in the same way as the above embodiment and produces the same effects as the above embodiment.

Note that this invention is not limited to the above-mentioned embodiments; for example, the break spring 25 may be configured by folding back at an acute angle, or the plug 1 and the receptacle 2 may be connected by an appropriate mechanism such as a screw type. Various other design changes can be made without changing the gist of the invention.

As described above, this device performs switching by moving the cover to follow the insertion and removal of the plug, and holds the center contact on the receptacle side in an immovable state, making it possible to directly connect the center contact to a printed circuit board, etc. This has the unique practical effect of simplifying soldering and increasing the stability of switch switching by connecting the pin of the plug to the immovable center contact or the break spring to the center contact. .

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing a conventional example, Fig. 2 is a perspective view showing the relationship between the plug and receptacle, Fig. 3 is an exploded perspective view of the receptacle, Fig. 4 is a longitudinal sectional view of the receptacle, and Fig. 5 is a longitudinal sectional view of the receptacle. FIG. 6 is a vertical cross-sectional view showing another embodiment of the plug inserted state; FIG. 1...Plug, 2...Receptacle, 11,2
1... Conductive shell, 12, 22... Insulator, 1
3...pin, 23...center contact, 25...
Break spring, 26...cover.

Claims (1)

[Scope of utility model registration request] A plug having a pin provided with an insulator interposed inside a conductive shell, and a plug having an insulator interposed inside the conductive shell that is electrically connected to the conductive shell and electrically connected to the pin. In a connector consisting of a receptacle pull and a receptacle pull provided with a center contact, a break spring is provided inside the conductive shell of the receptacle pull with an insulator interposed therebetween, and is supported and resiliently contacts the center contact. A connector characterized in that it is provided with a cover that moves following insertion and separates the center contact from the break spring, and further includes a coil spring that returns the cover to bring the center contact and the break spring into contact when the plug is removed. .