The following relates to coaxial cable connectors and more particularly relates to a novel and improved mini-coaxial cable connector assembly which is conformable for use with different size cables in effecting positive engagement with a connector assembly in connecting the cable to a post or terminal.
The problems associated with the connection of mini-coaxial cables as well as larger size cables to a post or terminal in the field are discussed at some length in hereinabove referred to co-pending application for patent for MINI-COAXIAL CABLE CONNECTOR and in U.S. Pat. No. 6,352,448 for CABLE TV END CONNECTOR STARTER GUIDE. This invention is directed to further improvements in termination assemblies to be employed for mini coaxial cables in which the termination assembly is characterized in particular by being comprised of a minimum number of preassembled parts which can be quickly assembled at the manufacturing site as well as in the field and is readily conformable for connection of different sized mini-coaxial cables to BNC and RCA connectors. Further wherein an extension tip can be recessed to permit a conductor to be positioned toward the back of the connector assembly, such as, for example, RCA connector assemblies; and including a novel form of centering guide for guiding the conductor into the recessed end of the extension tip.
In one aspect it is desirable to eliminate any form of a coupling or adaptor sleeve for small diameter coaxial cables so that the cable can be installed directly into the end of an extension tip which has been preassembled within the connector body.
In another aspect the connector body is provided with the necessary adaptability for connection to different sized cables and in such a way as to assure accurate alignment between the cable and connector preliminary to crimping of the connector onto the cable and prevents shorting between the cable layers with one another as well as with conductive portions of the connector; and specifically wherein inner and outer concentric compression members in the crimping region of the connector body cooperate in effecting positive engagement with the cable.
The foregoing is achieved by direct connection of the exposed end of a coaxial cable to an extension tip either prior to or after mounting of the extension tip in a hollow connector body wherein the cable is of the type having inner and outer concentric electrical conductors, an annular dielectric separating the conductors and an outer jacket of electrically non-conductive material, the inner and outer conductors being exposed at the end and the inner conductor projecting beyond the dielectric at one end of the cable; and the connector body is characterized by having a slotted compression ring which cooperates with an inner slotted sleeve to effect positive engagement with the cable in response to radially inward compression. The inner sleeve and compression ring are dimensioned to undergo the necessary compression in response to axial advancement of a crimping ring, and the trailing end of the inner sleeve is slotted to form prong-like segments having internal and external teeth so that the trailing end of the sleeve can be compressed into engagement with the cable without crushing the dielectric layer.
A spring-like retainer clip within a bore at one end of the extension tip is adapted to grasp the conductor pin and connect to the tip, and the retainer clip can be varied in size for different diameter conductor pins. Elimination of the adaptor sleeve on the cable affords greater latitude in visualization of the color of the extension tip as well as the compression ring; and either or both may be color-coded to match up with different sized cables.
A further aspect relates generally to cable connector comprising: a connector body, a compression member operably connected to a second end of the connector body, the compression member including a compression portion having a forward facing surface, wherein the compression portion protrudes from an inner surface of the compression member, wherein, when the compression member is slidably axially compressed within the connector body, the compression portion of the compression member compresses an inner sleeve into crimping engagement with a coaxial cable.
A further aspect relates generally to a coaxial cable connector having a hollow connector body, wherein the coaxial cable connector includes an elongated conductor pin, and wherein said coaxial cable connector includes an inner sleeve disposed within the connector body, comprising an extension tip inserted in a main bore of the connector body, the tip provided with a recess at one end for insertion of the conductor pin and an extension rod removably connected to an opposite end of the tip and wherein the tip and the rod are slidable through the connector body in response to axial movement of the cable and pin through the connector body; and a compression member operably connected to a second end of the connector body for compressing a slotted end of the inner sleeve into engagement with a coaxial cable.
A further aspect relates generally to a method comprising: providing a connector having a connector body, a compression member operably connected to a second end of the connector body, the compression member including a compression portion having a forward facing surface, wherein the compression portion protrudes from an inner surface of the compression member, and axially advancing the compression portion to radially compress a slotted end of an inner sleeve disposed within the connector body into crimping engagement with a coaxial cable.
It is therefore to be understood that even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only, and changes may be made within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed and reasonable equivalents thereof.
The above and other objects, advantages and features of the present invention will become more readily appreciated and understood from a consideration of the following detailed description of preferred and modified forms of the present invention when taken together with the accompanying drawings in which:
Referring in more detail to the drawings, there is illustrated in
As a setting for the embodiments to be described, the cable C is made up of an inner conductor pin or wire 20 which is surrounded by a dielectric insulator 22 of electrically non-conductive material, such as, a rubber or rubber-like material, a braided conductor layer 24, and an outer jacket 26 of an electrically non-conductive material, such as, a rubber or rubber-like material. The end of the cable C is further prepared for assembly by removing a limited length of the jacket 26 and braided conductor 24 as well as the insulated layer 22 in order to expose an end of the pin 20 along with a foil layer surrounding the pin 20. The braided conductor layer 24 is peeled away from the insulator 22 and doubled over as at 24′ to cover the leading end of the jacket 26.
As shown in
As best seen from the exploded view of
The opposite end of the body 10 is made up of a ferrule 50 which is slotted as at 52 into spring-like annular segments 54 extending from an annular base portion 56 of the ferrule 50 to facilitate attachment to a post or terminal, not shown, and the base 56 forms a central opening or passage for advancement of the tip 16 beyond the end of the ferrule, as shown in
The modified extension tip 16′ and cable Care illustrated in exploded form in
The crimping ring assembly 14 is of a type that can be preassembled onto the connector body 10 and axially advanced over the sleeve 12 to force it into crimping engagement with the slotted end 44 of the compression ring 13. To this end, the crimping ring 14 is made up of an annular body 80 composed of a low-friction material having limited compressibility, such as, DELRIN®, or other hardened plastic material. The body has a straight cylindrical portion 82 and a forwardly tapered portion 84 which terminates in a leading end 83 having an internal shoulder or rib 85. The leading end 83 fits over the trailing end of the sleeve 12 so that the crimping ring 14 can be axially advanced over the end of the sleeve 12 until the internal shoulder or rib 85 advances past the raised end 34, as shown in
An exterior surface of the body 80 is recessed or undercut to receive a reinforcing liner 92 which is preferably composed of brass and which fits snugly over the body 80. The leading end 93 of the liner 92 projects outwardly beyond the external surface of the body 80 to define an external shoulder of a diameter slightly greater than that of the leading end 83, as best seen from
The extension tip 16′ is inserted into the connector body 10 until the end of the extension rod 69 opposite to the reduced end 79 is positioned in alignment with the centering guide 33, as shown in
Mini-coaxial cables are particularly useful in cellular telephones, security cameras and other applications where there are decided space limitations or where short runs of cable are used. Referring to the embodiments shown and described, it will be evident that the thickness of the compression ring 13, as well as the width of the slots 44 and 48 may be varied according to the size or diameter of the cable C and be proportioned according to the space allowance between the cable C and the connector sleeve 11. Further, the compression ring may be installed either before or after shipment to the field. For example, it may be desirable for the installer to select a particular size of compression ring which would be dyed or colored to match a particular cable size. To that end, the compression ring 13 should have sufficient elasticity or spreadability to be inserted axially into the annular space between the assembled sleeves 11 and 12.
The resilient band 42 shown in
Embodiments of the inner sleeve 840 may include the same structural and/or functional aspects as inner sleeve 11 described above. Embodiments of the inner sleeve 840 may include a first end 841 and a second end 842. The second end 842 of the inner sleeve 840 may receive the cable C. When the cable C is inserted, the center conductor may engage a moveable pin assembly configured to be driven through the connector 800 during installation and attachment of the connector 800 to the cable C. The prepared cable C is inserted into the tip 16′ and advanced through the body 10 until the slotted segments of the inner sleeve are positioned over the doubled-over layer 24′ and jacket 26. Moreover, the second end 842 may be slotted so as to facilitate compression of the second end of the inner sleeve 840. In other words, the second of the inner sleeve 840 may be provided with circumferentially spaced longitudinal slots, the slots each being of a width to control the inward degree of bending by a compression portion 885 of the compression sleeve 880.
Embodiments of the connector body 810 may have a first end 812 and a second end 814. The second end 814 of the connector body 810 may include a retention feature, such as a lip, annular detent, edge, and the like, for structurally retaining a compression sleeve 880 in a preassembled position. In the preassembled position, the connector sleeve 880 is not axially advanced to a compressed position. In other embodiments, the connector body 810 may include more than one retention feature proximate, at, or otherwise near the second end 814. The retention feature of the connector body 810 may structurally correspond to a structural feature on the compression sleeve 880. The structural cooperation between the retention feature of the connector body 810 and the structural feature on the compression sleeve 880 may act to retain the two components together in a preassembled position. Embodiments of the structural feature of the compression sleeve 880 may be located at, proximate, or otherwise near the first end 881 of the compression sleeve 880. There may be more than one structural engagement feature of the compression sleeve to cooperate with the retention feature of the connector body 810.
Furthermore, embodiments of the compression sleeve 880 may include a first end 881, a second end 882, a compression portion 885 having a forward facing surface 886 and a rearward facing surface 887. Embodiments of the compression sleeve 880 may be operably connected to the connector body 810 in a preassembled position, or may be attached in the field. Embodiments of the compression sleeve 880 may be a compression member, a fastener member, and the like, configured to functionally engage a connector body 810 and create a seal against the cable C when axially compressed toward the front end of the connector 800. Embodiments of the compression portion 885 may be structurally integral with the compression sleeve 880; however, a separate component sharing its structural design may be attached to an inner surface of the compression sleeve 880. Embodiments of the compression portion 885 may protrude from an inner surface of the compression sleeve 880 a significant distance to ensure engagement with the second end 842 of the inner sleeve 840. The forward facing surface 886 and the rearward facing surface 887 may be tapered or ramped to allow or assist the compression sleeve 880 to move axially forward within the connector body 810, while exerting a gradually increasing compressive force against the slotted end 842 of the inner sleeve 840 until a fully compressed position is achieved. The radially inward compression of the second end 842 of the inner sleeve 840 may result in radial compression of the prepared end of the cable C. For instance, the second end 842 of the inner sleeve 840 may be compressed into sealing or sufficient mechanical interference with the doubled-over braided layer (i.e. outer conductor) of the cable C. Thus, a fastener member, such as compression member 880 may directly apply a compressive force against the inner sleeve 840 to grip, secure, and/or seal the outer conductor of the cable C when the cable C is installed within the connector 800. The direct compressive force against the second end 842 of the inner sleeve 840 onto the cable C requires less compression than having to compressive an outer connector body, a sleeve insert, and an inner sleeve onto the cable.
It is therefore to be understood that while different embodiments are herein set forth and described, the above and other modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and reasonable equivalents thereof.
This application is a continuation-in-part of U.S. application Ser. No. 13/400,282, filed Feb. 20, 2012, and entitled “Mini Coax Cable Connector,” which is a continuation of U.S. application Ser. No. 12/685,606, filed Jan. 11, 2010, now U.S. Pat. No. 8,142,223, which is a continuation-in-part of U.S. application Ser. No. 11/895,367, filed Aug. 24, 2007, now U.S. Pat. No. 7,645,161, which is a continuation-in-part of U.S. application Ser. No. 11/716,488, filed Mar. 9, 2007, now U.S. Pat. No. 8,464,422, which is a continuation-in-part of U.S. application Ser. No. 10/927,884, filed Aug. 27, 2004, now U.S. Pat. No. 7,188,507. All of these applications are incorporated by reference herein in their entireties.
Number | Date | Country | |
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Parent | 12685606 | Jan 2010 | US |
Child | 13400282 | US |
Number | Date | Country | |
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Parent | 13400282 | Feb 2012 | US |
Child | 14027877 | US | |
Parent | 11895367 | Aug 2007 | US |
Child | 12685606 | US | |
Parent | 11716488 | Mar 2007 | US |
Child | 11895367 | US | |
Parent | 10927884 | Aug 2004 | US |
Child | 11716488 | US |