JPH0635410Y2 - Coaxial plug - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a coaxial plug, and more particularly to a coaxial plug that prevents connection failure due to radio wave leakage and loosening at the contact surface with a coaxial jack.

[Conventional technology]

The coaxial plug is for connecting by coupling with a coaxial jack, and is used when connecting while maintaining a coaxial state corresponding to a coaxial cable.

[Problems to be solved by the device]

Here, the coaxial cable has a uniform structure over the entire length thereof, so that radio waves do not leak and the connection state does not change. On the other hand, since the coaxial connector mechanically connects the plug and the jack, it is rather difficult for the connecting portion to always maintain the same connection state as the coaxial cable, and between the plug and the jack, There is a gap from the beginning of the connection, or loosening occurs over time after connection, resulting in radio wave leakage or poor connection. The present invention has been made in consideration of the above points, and an object of the present invention is to provide a coaxial plug capable of preventing electric wave leakage at the contact surface between the coaxial plug and the coaxial jack and connection failure due to loosening of both. .

[Means for Solving the Problems]

In order to achieve the above object, the present invention provides a coaxial plug, which is combined with a coaxial jack having an external thread on its outer periphery according to claim 1, and a cable guide which is provided at one axial end and to which a coaxial cable is connected. A ring provided on the other end in the axial direction and having a female member threaded to engage with the male screw of the coaxial jack, and a portion inside the nut member where the end face of the coaxial jack abuts A coaxial plug, comprising: a coaxial insertion member; and a ring-shaped insertion member of the coaxial plug according to claim 1, wherein the ring-shaped insertion member is formed of a conductive plastic material, According to a third aspect of the present invention, the ring-shaped insertion member in the coaxial plug according to the first aspect provides a coaxial plug made of a conductive elastic material.

[Action]

The coaxial plug according to the first aspect is formed so that the ring-shaped insertion member is interposed between the respective contact end surfaces with the coaxial jack. Therefore, if the coaxial plug is connected to the coaxial jack, the space between them is filled with the ring-shaped insertion member, and the gap that causes the electric wave leakage is sealed. At the same time, the coaxial plug is mechanically firmly fixed to the coaxial jack.

In the coaxial plug according to the second aspect of the present invention, the ring-shaped interposing member formed of the conductive elastic material satisfactorily fits into the space of the contact end face of the coaxial plug with the coaxial jack to fill the space.

In the coaxial plug according to the third aspect, the ring-shaped insertion material formed of the conductive elastic material exerts a pressing force on each contact surface of the coaxial plug and the coaxial jack.

[Effect of device]

According to the configuration of claim 1, since the ring-shaped interposing member is provided in the space of the portion of the coaxial plug that comes into contact with the coaxial jack, the gap between the coaxial plug and the coaxial jack is filled and radio wave leakage does not occur. It is also possible to prevent loosening between the two.

According to the configuration of claim 2, since the space of the contact surface of the coaxial plug with the coaxial jack is filled with the ring-shaped insertion member formed of the conductive plastic material, the electric wave leakage from this space is effectively prevented. it can.

With the structure according to the third aspect, since the pressing force is applied between the contact surfaces of the coaxial plug and the coaxial jack, the loosening between the coaxial plug and the coaxial jack can be effectively prevented.

〔Example〕

FIG. 1 shows an embodiment of the present invention, in which 10 is a coaxial plug to which a coaxial cable 20 is connected.
Connected to 30.

In this embodiment, since the ring-shaped insertion member is incorporated in the coaxial plug 10, the simultaneous plug 10 is shown in detail and only a part of the coaxial jack 30 side is shown.

The coaxial plug 10 includes a nut member 12 so that it can contact the cable guide 11, the nut member 12, and the end surface of the cable guide 11.
It has a ring-shaped insertion member 13 housed in the internal space of the.

The cable guide 11 has a coaxial cable core 21 at the center.
And a cylindrical space for passing the insulating material 22 is formed, and the outer periphery has a cylindrical portion which is inserted between the insulating material 22 and the braid 23 of the coaxial cable 20 and is connected to the braid 23 in the right half in the figure. In addition, it has a ring-shaped projection for fixing the coaxial cable 20 to the cable guide 11 by tightening the braid 23 and the insulating clothing 24 from the outer circumference of the braid 23 and a ring-shaped tightening member (not shown) at the right end. A ring portion for locking the nut member 12 is formed on the left side portion of the cable guide 11.

A nut member 12 is attached so as to engage with the ring portion of the cable guide 11. The nut member 12 is internally cut with a female screw that engages with a male screw provided on the outer periphery of the coaxial jack 30, and the coaxial plug 10 is connected to the coaxial jack 30 by rotating and tightening the nut member 12. .
The coaxial jack 30 has a holder 32 made of an insulating material in an outer conductor 31.
The receiving pins 33 housed in the are arranged. The receiving pin 33 comes into contact with the core wire 21 of the coaxial cable 20 serving as the central conductor on the side of the coaxial plug 10 when the coaxial cable 20 is assembled to the coaxial plug 10.

When the coaxial plug 10 is connected to the coaxial jack 30, the left end surface of the cable guide 11 in the drawing faces the right end surface of the coaxial jack 30 via the ring-shaped insertion member 13. Then, by rotating the nut member 12 of the coaxial plug 10 and tightening the coaxial plug 10 tightly into the coaxial jack 30, the left end face of the cable guide 11 of the coaxial plug 10 and the coaxial jack 30 are tightened.
The right end face of 30 is pressed into contact with the ring-shaped insertion member 13. At this time, the ring-shaped insertion member 13 receives the acting force between the coaxial plug 10 and the coaxial jack 30, and firmly fixes the two.

If the ring-shaped insertion member 13 is made of a plastic material such as lead,
The gap between the cable guide 11 of the coaxial plug 10 and the coaxial jack 30 can be satisfactorily filled, and the nut member 12 can be prevented from returning to rotation. In addition, if the ring-shaped insertion member is of a spring type, it can be tightened so as to minimize the gap, and of course, rotation return of the nut member 12 can also be prevented.

2 (a), (b), (c) and (d) show various structural examples of the ring-shaped insertion member 13, and FIG.
Is a washer 13A using a plastic material such as lead, and FIG. 1B is a washer 1 having a corrugated continuous step.
3B, FIG. 3C shows a washer 13C which is gently curved as a whole, and FIG. 3D shows a spring washer.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing an embodiment of the present invention, and FIGS. 2 (a), (b), (c) and (d) are ring-shaped interposers used in the same embodiment. It is a figure which shows the specific structural example of an insertion member. 10 ... Coaxial plug, 11 ... Cable guide, 12 ... Nut member, 13 ... Ring insertion member, 20 ... Coaxial cable, 21 ... Core wire, 22 ... Insulation material, 23 ... Braid, 24 ... Insulation coating, 30 ... Coaxial jack , 31 ... Peripheral conductor, 32 ... Holder, 33 ... Receiving pin.

Claims (3)

[Scope of utility model registration request] 1. A coaxial plug, which is combined with a coaxial jack having an external thread cut on the outer periphery, is provided at one end in the axial direction and is provided at the other end in the axial direction with a cable guide to which a coaxial cable is connected. A nut member having a female thread engaging with a male thread of the coaxial jack is cut, and a ring-shaped interposing member arranged at a portion inside the nut member with which an end surface of the coaxial jack abuts. And a coaxial plug. 2. The coaxial plug according to claim 1, wherein the ring-shaped insertion member is made of a conductive plastic material. 3. The coaxial plug according to claim 1, wherein the ring-shaped insertion member is made of a conductive elastic material.