JPH0379834B2 - - Google Patents

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. In order to selectively make such interconnections, one type of jack type and one type of plug type are used.
Paired coaxial connectors are widely used. 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. Additionally, U.S. Patent No.
Coaxial connectors with other configurations are disclosed in publications such as No. 4377320, No. 3745514, and No. 4013139. However, these conventional coaxial connectors have been difficult to meet the above-mentioned requirements, particularly 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; and an insulating member held within the hole of the insulating member and capable of being crimped onto the exposed center conductor of the coaxial cable. a central contact member; a small diameter part crimped to the outside of the exposed outer conductor of the coaxial cable; and a small diameter part that contacts the outer periphery of the large diameter part of the inner shell member and protrudes forward, and has an annular groove in the middle part. an outer shell member having a large diameter portion formed therein;

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.

(Embodiments) Hereinafter, the plug-type coaxial connector of the present invention will be described in detail based on the embodiments shown in the drawings, along 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 can be matedly connected to a jack-type coaxial connector 14 mounted on a metal enclosure 18 of an electronic device 20. . A typical electronic device 20 has a microscopic circuit on a board grounded to a metal container 18, and the center contact of the jack-type coaxial connector 14 is electrically connected to the signal path of the board. connected to.

Figures 1 to 3 show a plug-type coaxial connector 12,
The terminal end of the plug-type coaxial connector 12 on the coaxial cable 16 is shown. 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 stamped metal component and has a large diameter portion 30 and a small diameter portion 32. Insulating member 26 is molded or machined from a suitable plastic material and has a contoured hole 34 extending therethrough;
A central contact member 28 is disposed within the bore 34 , with the annular flange 36 of the central contact member 28 abutting the contoured bore 3 and the stop surface 40 .
A further tapered annular barb 42 is disposed within the enlarged outer end 28 of the insulating member 26 and cuts into the material of the insulating member 26, thereby locking it into position within the hole 34 of the insulating member 26, as shown in FIG. The central contact member 28 is fixed to. Alternatively, the flange 36 may be provided closer to the front end of the central contact member 28,
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 36 is arranged to abut the surface within the enlarged front end 39 of the hole 34; The flared end may be located within the enlarged end 38. This structure does not require the use of the barb 42. The central contact member 28 is connected to the hole 34 of the insulating member 26.
After being secured in place within the inner shell member 24, the assembly is inserted into the large diameter section 30 of the inner shell member 24 and is secured to the large diameter section 30 by a plurality of spaced apart pawls 44.
fixed inside. The pawl 44 is formed within the large diameter section 30 and is pushed into the insulating member 26 as shown in FIG. This then forms the central and outer contact assemblies 22, and the assemblies 22
is the center conductor 46 and outer conductor 48 at the stripped end of the coaxial cable 16, as shown in FIG.
The exposed end of the terminal is ready to be terminated.

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 56 is provided in the enlarged diameter section 52 and a flared opening 58 is provided at the forward 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 16 with an exposed center conductor 46.
and an insulating sheath 60 surrounding the center conductor 46 that connects the center and outer contact assemblies 2.
2 and the center conductor 46 is located within the bore 62 of the center contact member 28, the insulating sheath 60 is located within the reduced diameter section 32, and the exposed outer conductor 48 is located within the reduced diameter section 32. mounted on top. 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 64 is provided. After the crimping,
The outer shell member 50 is moved along the cable 16 into engagement with the inner shell member 24, with the enlarged diameter section 52 engaging and extending along the large diameter section 30, and the reduced diameter section 52 engaging and extending along the large diameter section 30. 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 exposed end of the outer insulating jacket 66. extend. The crimping tool is then used to center and position the center and outer contact assemblies 22 relative to the outer shell member 50, after which the reduced diameter section 54 is aligned with the reduced diameter section 3.
2, thereby electrically and mechanically connecting the outer conductor 48 therebetween. Although the crimp shape is hexagonal, it can take other shapes if desired. As shown in FIG. 6, the portion of reduced diameter section 54 that engages outer insulating jacket 66 serves to relieve tension in cable 16. An outer shell member 50 electrically connected to the inner shell member 24 defines an outer contact member of the plug-type coaxial connector 12 and includes an inwardly directed annular groove 56 and a flared aperture 58 . A portion of the diameter portion 52 is a hood portion (cover) 68, and the hood portion 68 is a portion of the central contact member 2.
8 and extends coaxially with the central contact member 28 . The front end of the central contact member 28 has a pin-shaped contact portion 70 .

Referring to FIG. 5, a jack-type coaxial connector 1 that mates with a plug-type coaxial connector 12 of the present invention
An example of No. 4 will be briefly explained. The illustrated jack-type coaxial connector 14 includes a shell member 72, an insulating member 74, and a central contact member 76. Metal shell member 72 has an aperture 78 terminating in an inwardly directed annular flange 80 . a series of teeth (serrations)
82 extends 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.

The hood part 68 is a jack type coaxial connector 1
4 along the rounded protrusions 88 of the spring-like contact members 86 of the jack-type coaxial connector 14, thereby biasing each protrusion 88 inwardly toward the third tubular portion 100 formed in the insulating member 74 of the jack-type coaxial connector 14. At this time, as the central 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 each rounded protrusion 88 engages with the inner The hook comes to rest within the annular groove 56, thereby allowing the outer contact member represented by the hood portion 68 of the outer shell member 50 of the plug-type coaxial connector 12 and the spring-like shape of the shell member 72 of the jack-type coaxial connector 14 to rest. The central contact members 28 and 76 are electrically connected to the contact member 86 , and the central contact members 28 and 76 are connected to the pin-shaped contact portion 70 and the contact portion 1 .
It is electrically connected via 08. The conductive path between outer contact members 50, 72 is short-circuited. because,
This is because the contact is made by the rounded protrusion 88 located in the hook 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 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 to 4 mm.
can be made ultra-small. 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, and FIG.
Exploded perspective view of the plug-type coaxial connector shown in Figure 3.
The figure is an enlarged exploded perspective view of the main part of Fig. 2, 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 jack type coaxial connector used together with the plug type coaxial connector of the present invention. FIG. 6 is a perspective view showing an example of a coaxial connector, and FIG. 6 is a sectional view showing a fitted state of both the coaxial connectors of FIGS. 1 and 5. 12... Plug type coaxial connector, 16... Coaxial cable, 24... Inner shell member, 26... Insulating member, 28... Center contact member, 46... Center conductor, 48... Outer conductor, 50... Outer side Shell member, 5
6... Annular groove, 60... Insulating sheath.

Claims (1)

[Claims] 1. 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 hole in the center; a central contact member held within the hole of the insulating member and capable of being crimped to an exposed central conductor of the coaxial cable; and an 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: and.