JPH02270276A - Plug-type coaxial connector - Google Patents

Abstract

PURPOSE: To enhance the workability, construct in a very small size, and improve the electric characteristics by arranging so that the external conductor of a coaxial cable can be connected in pressure bonding with a minor diametric portion between an inner shell and outer shell member and that the center conductor can also be connected in pressure bonding with a center contact. CONSTITUTION: A contact assembly 22 is equipped with an inner shell member 24, insulating member 26, and center contact member 28, wherein the inner shell 24 has a major 30 and a minor diametric portion 32. The insulating member 26 has a hole 34 having a contour extending in such a way as penetrating itself, and in this hole 34 the center contact 28 is installed, where a ring-shaped flange 6 furnished on the center contact 28 is arranged inside the enlarged outer end of the contour-equipped hole 34 in such a condition as contacting with a stopper surface 40. A ring-shaped return projection 42 equipped with taper bites into the material of the insulating member 26 so that the center contact member 28 is fixed to the specified position in the hole 34. This allows enhancing the workability, constructing in a very small size, and establishing good electric characteristics.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a coaxial connector, and particularly to a plug-type coaxial connector connected to one end of a coaxial cable.

(Prior art and its problems) Coaxial cables are used for interconnection between electronic devices that handle high frequency signals. A pair of jack-type and plug-type coaxial connectors are widely used to selectively make such interconnections. As electronic devices become smaller and more sophisticated, these coaxial connectors need to be smaller, have easy and reliable mating operations, and have good electrical characteristics such as signal transmission loss.

Conventionally, BNC type connectors and the like have been known as such coaxial connectors. Also, US Pat. No. 4,377,320,
Coaxial connectors with other configurations are disclosed in Publications No. 3745514 and No. 4013139.

However, these conventional coaxial connectors meet the requirements mentioned above.
In particular, there were difficulties in terms of miniaturization.

Therefore, an object of the present invention is to provide a plug-type coaxial connector that satisfies all of these requirements.

(Means for Solving the Problems) The plug type coaxial connector of the present invention has a small diameter portion inserted between the insulating sheath and the outer conductor at one end of the coaxial cable, and a large diameter portion protruding toward the exposed central conductor side. an insulating member fixed within the large diameter portion of the inner shell member and having a hole in its center; a small-diameter portion crimped to the outside of the exposed outer conductor of the coaxial cable; and an annular groove in the middle portion of the inner shell member that contacts the outer periphery of the large-diameter portion and protrudes forward; and an outer shell member having a large diameter portion formed with a diameter.

The plug-type coaxial connector of the present invention configured as described above is used by being attached to one end of a coaxial cable.

(Example) Hereinafter, the plug type coaxial connector of the present invention will be described in detail based on the example shown in the drawings together with an example of a jack type coaxial connector used therewith.

As shown in FIG. 4, a small coaxial cable 16 is terminated via a plug-type coaxial connector 12, which is connected to a metal container 18 of an electronic device 20.
It is possible to connect in a mating state with a jack-type coaxial connector 14 mounted above. The electronic device 20
A typical example includes a micro-piece circuit on a board grounded to a metal container 18, and the center contact of a jack-type coaxial connector 14 is electrically connected to the signal path of the board. .

1-3 illustrate a plug-type coaxial connector 12 and the termination of the plug-type coaxial connector 12 on a coaxial cable 16. FIG. As shown in FIG. 3, contact assembly 22 includes an inner shell member 24, an insulating member 26, and a central contact member 28. As shown in FIG. The inner shell member 24 is a metal part made by punching and stretching, and includes a large diameter portion 30 and a small diameter portion 32.
It has The insulating member 26 is molded or machined from a suitable plastic material and has a contoured hole 34 extending therethrough, with a central contact member 28 disposed therein. Central contact member 28
an annular flange 36 is disposed within the enlarged outer end 28 of the contoured hole 34 abutting the stopper surface 40;
Further, a tapered annular return protrusion 42 is provided on the insulating member 2.
6 into the material of the central contact member 28, thereby placing the central contact member 28 in position within the hole 34 of the insulating member 26 as shown in FIG.
to be fixed. Alternatively, the flange 3B may be provided near the front end of the central contact member 28, and when the rear end 41 of the contact member 28 is expanded into a morning glory shape and the central contact member 28 is press-fitted into the hole 34, The flange 3B may be arranged to abut a surface within the enlarged front end 39 of the hole 34, and the flared end may be arranged within the enlarged end 38. This configuration does not require the use of the barb protrusion 42. After the central contact member 28 is secured in place within the hole 34 of the insulating member 26, the assembly is inserted into the large diameter portion 30 of the inner shell member 24 and is tightened by a plurality of spaced apart pawls 44. It is fixed within the diameter section 30. The mold 44 is formed within the large diameter section 30 and is pushed into the insulating member 26 as shown in FIG. This then forms a center and outer contact assembly 22, which is shown in FIG. The termination is now ready to be formed.

Outer shell member 50 is a stamped piece having an enlarged diameter section 52 and a reduced diameter section 54. An inwardly directed annular groove 5B is provided in the enlarged diameter section 52, and a bell-shaped opening 58 is provided at the front end of the enlarged diameter section 52.

In an assembly such as that shown in FIGS. 1-2, an outer shell member 50 is mounted over a small coaxial cable IB with an exposed center conductor 46 and a
An insulating sheath 80 surrounding the center conductor 46 is disposed within the center and outer contact assemblies 22, and the center conductor 46 is positioned within the hole 62 of the center contact member 28, with the insulating sheath 60 having a small Mounted on the reduced diameter section 32 is an exposed outer conductor 48 located within the diameter section 32 . After ensuring that the center conductor 46 is properly positioned within the hole 62, the center contact member 28 is then crimped onto the center conductor 46 using a crimping tool (not shown). An inspection hole 84 is provided. After said crimping, outer shell member 50 is moved along cable 16 into engagement with inner shell member 24, with enlarged diameter section 52 engaging and extending along large diameter section 30. , and a reduced diameter section 54 extends along and along the reduced diameter section 32 and on the outer conductor 48, and the outer end of the reduced diameter section 54 extends along the outer insulating jacket 6B. extending along the exposed edge of the

Thereafter, the center and outer contact assemblies 22 are attached to the outer shell member 5.
The crimping tool is used to center and position the reduced diameter section 54 onto the reduced diameter section 32, thereby electrically connecting the outer conductor 48 therebetween. and mechanically connected. The specie shape is hexagonal, but can take on other shapes if desired. As shown in FIG. 6, the portion of reduced diameter section 54 that engages outer insulation jacket 66 serves to relieve tension in cable 1B. Inner shell member 2
The outer shell member 50 electrically connected to the outer shell member 5 defines the outer contact member of the plug-type coaxial connector I2 and includes an inwardly directed annular groove 56 and a bell-shaped opening 58.
A portion of enlarged diameter section 52 at 0 is a hood 68 that is spaced from and extends coaxially with central contact member 28 . Central contact member 2
The front end of 8 has a pin-shaped contact portion 70 .

With reference to FIG. 5, a plug-type coaxial connector 12 of the present invention
An example of the jack-type coaxial connector 14 that fits with the following will be briefly described. Illustrated jack-type coaxial connector 14
includes a shell member 72, an insulating member 74, and a central contact member 7B. The metal shell member 72 has an aperture 78 with an inwardly directed annular flange 80. A series of teeth (
Knurls 82 extend along the outer surface of shell member 72 from outwardly directed annular flange 84 . An arcuate spring-like contact member 86 projects outwardly from flange 84 coaxially with bore 78 . A plurality of outwardly rounded projections 88 are provided at the free end of the spring-like contact member 86.

By moving along the rounded protrusions 88 of the spring-like contact members 86 of the jack-type coaxial connector 14, the hood portion 68 connects each protrusion 88 to the third tubular shape formed on the insulating member 74 of the jack-type coaxial connector 14. Part 100
When the center contact member 28 moves along the hole 90 of the insulating member 74, the pin-shaped contact portion 70 electrically engages with the contact portion 108, and the rounded contact portion 70 is electrically engaged with the contact portion 108. Each protrusion 88 has an inner catch that rests within the annular groove 56, thereby allowing the plug-type coaxial connector 12
the outer contact member represented by the hood portion 68 of the outer shell member 50 and the shell member 7 of the jack type coaxial connector 14.
The two spring-shaped contact elements 86 are electrically connected, with the central contact element 28.76 being electrically connected via the bottle-shaped contact part 70 and the contact part 108. The conductive path between outer contact members 50.72 is shorted. This is because the contact is made by means of a rounded protrusion 88 located in the groove 56, and such contact allows the coaxial cable to be used in the field of high radio frequencies.

It will be understood that the above-described plug-type coaxial connector represents a preferred embodiment of the present invention, and that various modifications and changes can be made without departing from the spirit thereof.

(Effects of the Invention) As can be understood from the above explanation, according to the plug-type coaxial connector of the present invention, the outer conductor of the coaxial cable can be crimped and connected between the small diameter portions of the inner shell member and the outer shell member, and the center conductor can also be connected to the small diameter portion of the inner shell member and the outer shell member. It has excellent workability because it can be connected to the contact member by crimping. In addition, the shell member only has a relatively small annular groove and does not use coil springs as in the past, so the diameter is 3.
Ultra-miniaturization of ~4 m is possible. Furthermore, since the coaxial state can be maintained over the entire length, the electrical characteristics are also excellent.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway enlarged perspective view of a preferred embodiment of the plug-type coaxial connector of the present invention, FIG. 2 is an exploded perspective view of the plug-type coaxial connector of FIG. 1, and FIG. FIG. 4 is a perspective view showing an example of use of the plug-type coaxial connector of the present invention, and FIG. 5 is a perspective view showing an example of a jack-type coaxial connector used together with the plug-type coaxial connector of the present invention. 6 are sectional views showing the fitted state of the double-open shaft connectors of FIG. 1 and FIG. 5. 12... Plug type coaxial connector 1G... Coaxial cable 24... Inner shell member 26... Insulating member 28... Central contact member 4G... Central conductor 48... Outer conductor 50... Outer shell member 5B... annular groove 60
...Insulating sheath remains

Claims (1)

[Claims] An inner shell member having a small diameter portion inserted between an insulating sheath and an outer conductor at one end of a coaxial cable and a large diameter portion protruding toward the exposed central conductor; an insulating member fixed within the large diameter portion and having a central hole; a central contact member retained within the hole of the insulating member and crimpable to the exposed central conductor of the coaxial cable; an outer shell member having a small diameter portion crimped to the outside of the outer conductor and a large diameter portion protruding forward in contact with the outer periphery of the large diameter portion of the inner shell member and having an annular groove formed in an intermediate portion; A plug-type coaxial connector characterized by comprising the following.