CROSS REFERENCE TO RELATED APPLICATIONS
This application is a companion application to the Muhs et al application Ser. No. 11/593,417 filed Nov. 6, 2006 entitled “Adapter for Attaching an Insertion Device to a Cable Fitting”.
BACKGROUND OF THE INVENTION
1. Field of the Invention
A locking device attaches to a first end of a plug-supporting housing a telecommunications plug having a cable that extends through a longitudinal bore contained in the housing. The locking device includes at least one locking plate having a first end portion connected with the housing, and a second end portion containing a projection for engaging a corresponding retaining surface, thereby to retrain the plug within a first plug-receiving chamber contained within a first end of the housing. In a first embodiment, the locking plate retains in the first chamber either the plug, or a hollow adapter frame that contains the plug. In a second embodiment, an adapter body containing a second plug-receiving chamber is fastened to the housing first end, and a pair of locking plates lock within the second chamber either the plug, or an adapter frame that contains the plug.
2. Description of the Related Art
It is known in the patented prior art to provide fittings for supporting the plugs and cables of a telecommunications system, as shown by the U.S. patent to Guelden No. 4,349,236. Typical adapter housings make it possible to use the plug and socket parts inserted in them also in a rougher environment—for example, in production facilities or vehicles—by attaining a protection class that will be higher when compared to the protection class of the plug part such as, for example, IP65 or IP67. The idea of meeting stiffer requirements from environmental classifications was further developed and anchored, for example, in the typical systems shown in the U.S. patents to Below et al Nos. 6,475,009 and 6,595,791. These patents disclose various adapter plug housings and adapter jacket housings, which in each case are suitable for receiving RJ45 plugs or RJ45 sockets.
The present invention was developed to provide a more developed embodiment of an adapter plug housing and an adapter socket housing where the design of the locking arrangement of the plug part and the socket part on the adapter plug housing and on the adapter socket housing is optimized.
Preferably, the adapter housing should furthermore meet stiff mechanical and chemical stresses and requirements with simple design means, and it should nevertheless be suitable for receiving plug parts and socket parts that vary in type or size.
BRIEF SUMMARY OF THE INVENTION
Accordingly, a primary object of the present invention is to provide locking means for locking in a first chamber contained in the first end of an elongated housing a telecommunications plug having a cable that extends through a longitudinal bore contained in the housing, said locking means including at least one rectangular resilient locking plate having a first end connected with the housing, and a second end connected with the telecommunications plug.
According to a more specific object of the invention, in a first embodiment, the locking plate locks the plug directly to one wall of the first chamber. In a second embodiment, two parallel spaced locking plates lock between a pair of opposing walls of the first chamber a hollow adapter frame containing the plug. In a third embodiment, an adapter body is attached to the first end of the housing, said adapter body containing a second through bore the communicates with the first through bore of the housing and with a second chamber within which is fastened by the locking plates either the plug or a hollow adapter frame containing the plug.
A further object of the invention is to provide a telecommunications plug locking arrangement including at least one resilient rectangular plug formed from metal or a synthetic plastic material, said plate having a first end containing an opening for receiving a fixed projection on the housing, and a second end including a projection for engaging a stop or retaining surface fixed with respect to the plug. Preferably the pug is cantilevered with the free extremity thereof be inclined outwardly at an acute angle to facilitate the insertion of the plug into its associated chamber. The locking plates maintain the components together in a positive manner during rough usage of the cable fitting assembly.
BRIEF DESCRIPTION OF THE DRAWINGS
Other objects and advantages of the invention will become more apparent from a study of the following specification, when viewed in the light of the accompanying drawings, in which:
FIGS. 1
a and 1b are perspective and longitudinal sectional views, respectively, of a telecommunications plug and cable fitting arrangement incorporating a first embodiment of the locking means of the present invention;
FIGS. 2
a and 2b are perspective and longitudinal sectional views, respectively, of a cable fitting arrangement including a second embodiment of the locking means of the invention;
FIGS. 3
a and 3b are perspective and exploded views, respectively, of an adapter body including the locking means of the present invention;
FIG. 4 is an exploded view of the adapter body of FIG. 3;
FIGS. 5
a and 5b are perspective and longitudinal views, respectively, of the adapter body and locking plate means of FIGS. 3a and 3b;
FIGS. 6
a and 6b are perspective and longitudinal sectional views, respectively, of a second embodiment of the adapter body arrangement of FIGS. 3a and 3b;
FIGS. 7
a and 7b are perspective and longitudinal sectional views, respectively, of a third embodiment of the adapter body arrangement of FIGS. 3a and 3b;
FIGS. 8
a-8e are perspective and end views of the fitting of FIG. 1a, with certain parts removed;
FIGS. 9
a, 9b, and 9c are perspective, longitudinal sectional and detailed views, respectively, of the apparatus of FIG. 1a, with certain parts removed;
FIG. 10 is an exploded view of the apparatus of FIG. 1a;
FIGS. 11
a and 11b are perspective and partially-exploded views, respectively, of the apparatus of FIG. 8a including a first telecommunications plug and adapter frame arrangement, and FIGS. 12a and 12b, FIGS. 13a and 13b, and 14a and 14b are corresponding views of other plug and adapter frame arrangements, respectively;
FIG. 15 is a detailed sectional view illustrating the locking plate means of FIGS. 1a and 1b;
FIGS. 16
a-16e are perspective and end views of a modification of the adapter body arrangement of FIG. 4;
FIGS. 17
a and 17b are perspective and exploded views, respectively, of the adapter body apparatus of FIG. 4 receiving a first plug embodiment, and FIGS. 18a and 18b and 19a and 19b illustrate other plug and adapter frame embodiments for connecting a plug within the adapter body; and
FIGS. 20
a and 20b are perspective and longitudinal sectional views, respectively, of a third modification of the apparatus of FIGS. 1a and 1b.
DETAILED DESCRIPTION OF THE INVENTION
Referring first more particularly to FIGS. 1a, 1b, and FIG. 10, the present invention relates to means for connecting to a cable fitting a telecommunications plug 34 having a cable C attached thereto. The cable fitting includes a tubular plug-supporting housing 1 containing a through bore 50 through which the cable C extends. The telecommunications plug 34 is fastened within a first plug-receiving chamber 11a contained in a first end of the housing 1. At its other end, the housing is connected by an outer concentrically mounted sleeve 29 with a tubular flexible cable protective member 30 having an annular end cap 30a. An internal cable-supporting member 40 having a plurality of spring fingers arranged in circumferentially spaced relation around the cable is mounted within the longitudinal through bore 50, as is known in the art. As shown in FIG. 10, annular seal means 27, 27′, and 27″ are provided for sealing the concentric spaces defined around the outer surfaces of the housing 1.
As shown in FIG. 10, the housing 1 contains on its outer periphery a plurality of circumferentially spaced recesses 16 that receive labels 26 that are color-coded or that bear indicia relating to the plug 34. Similarly, a color-coded or indicia bearing split outer ring 33 is provided that is either color coded or provided with indicia for identifying the specific plug 34 that is connected with the cable fitting.
In accordance with a characterizing feature of the invention, the telecommunications plug 34 is locked within the first chamber 11a by locking means 12 including a locking plate 13.′ As shown in FIGS. 9a, 9b, 9c, and FIG. 10, the locking plate 13′ has a generally rectangular configuration and is provided at one end with an opening 15 that receives a fixed internal locking projection 18 on the housing 1, as best shown in FIG. 9c. At its other end, the locking plate 13′ is provided with an opening 17 that is punched outwardly to define a projection 22′ that is adapted to engage a corresponding stop surface 52 on the outer surface of the telecommunications plug 34. The locking plate 13′ is formed of a resilient metal or synthetic plastic material, and is provided at its free extremity with an angularly bent portion 19 that is arranged at an acute angle relative to the plane of the locking plate. This angular end portion 19 serves to facilitate entry of the plug into the chamber 11a until the projection 22′ engages the stop surface 52 on the plug 34.
As shown in FIGS. 8a-8e, at least one wall of the first chamber 11a is provided with a slot 20 or 37 for receiving the locking plate 13.′ The walls of the slot 20 are preferably undercut to provide retaining means for retaining the locking plate in place.
Referring to the modification shown in FIGS. 2a and 2b, the locking means 12 may be a cantilevered resilient synthetic plastic plate-like member 24′ that is provided at its free end with a projection 23′ which engages a corresponding stop surface on the telecommunications plug, thereby to retain the same within the first chamber 11a. The synthetic plastic locking plate 24′ is connected at one end with, and is carried by, a sleeve member 53 that is supported within the bore 50 of the housing 1. In the embodiment shown in FIGS. 20a and 20b, the locking plate 28′ is formed of metal and is integral with the metallic housing 1. In this case, the projection 60′ is carried by the free end of the resilient locking plate 28.′
Referring now to FIGS. 11a and 11b, it will be seen that in order to mount a telecommunications plug 34a of a given smaller size within the plug-receiving chamber 11a, use is made of an adapter frame 38 as set forth in the prior Muhs U.S. patent application referred to above. In this case, the locking plate 13′ is mounted within the first chamber 11a by means of a projection (not shown) that cooperates with the opening 15 contained in the locking plate 13.′ The projection defined by the opening 17 is operable to engage the stop surface 52 on the outer surface of the adapter frame 38, thereby to retain the adapter frame within the through bore contained in the housing 1. In this embodiment, the plug 34a is of the RJ45 telecommunications plug type, as is known in the art.
Referring now to FIGS. 12a and 12b, a telecommunications plug 34b of the RJ45-type is supported by frame 37 within the opening 11a, use being made of the locking plate 13′ to lock the frame 37 within the housing 1. In the embodiment of FIGS. 13a and 13b, the locking plate 13′ is operable to lock the frame 35 within the first chamber 11a, which frame receives an LC-duplex-type connector 34c. In the embodiment of FIGS. 14a and 14b, the locking plate 13′ engages the stop opening 52 in the outer surface of the frame 36, thereby to fasten a 2SC spaced from an SC-RJ connector 34d.
As illustrated in FIGS. 3a and 3b, an adapter body 2 may be provided for mounting a smaller given telecommunications plug 21a within the first plug-receiving chamber 11a contained in the housing 1. More particularly, the adapter body 2 has a first end 2a provided with a rectangular cross-sectional configuration, and a second end 2b having a circular cross-sectional configuration for insertion within the outer sleeve member 25 (FIGS. 1a and 1b) provided at the first end of the housing 1. More particularly, the second end 2b of the adapter body 2 is fastened to the outer sleeve 25 by means of a bayonet connection including fastening pins 3 arranged on the inner surface of the sleeve 25 that cooperate with corresponding bayonet slots 4 contained in the outer surface of the second end portion 2b of the adapter body. The adapter body 2 contains a second through bore 54 (FIG. 5b) that terminates in the second plug-receiving chamber 11b. As shown in FIG. 3b, two parallel spaced locking plates 13 and 14 serve to lock a plug 21a of the RJ45 type within the second chamber 11b. The locking plates 13 and 14 contain at first ends openings 15 that receive corresponding projections provided on the inner surface of the adapter body 2. At the other ends, the locking plates are provided with projections 22 that are punched out from the opening 17 to define stop surfaces that engage the retaining surfaces 52 on the outer surface of the plug 21a. As best shown in FIGS. 4 and 15, the free extremities of the locking plates are provided with angularly bent extremities 19 that facilitate insertion of the plug 21 within the second chamber 11b.
The outer surface of the adapter body portion 2b is provided with screw threads 8 (FIG. 15) that receive a nut 9, thereby to clamp the adapter body 2 within an opening contained in a fixed support. Furthermore, the rectangular portion of the adapter body may be secured to the fixed support by screw means extending through openings 6 contained at the corners of the flange portion 2a of the adapter body. In the embodiment of FIGS. 4 and 15, the locking plates are retained within the opening 11b of the adapter body 2 by the cooperation between projections 18 that extend into corresponding openings 15 contained in the locking plates. In the modification of FIGS. 5a and 5b, the locking plates are carried by a common support 62 that is inserted within the through bore 54 of the adapter body 2. The locking plates are supported within corresponding recesses 37 provided in the walls of the through bore of the adaptor body 2, as shown in FIGS. 4 and 16c. In the embodiment of FIG. 16e, the locking plates 13 and 14 are vertically arranged, while in the embodiment of FIG. 17, the locking plates are horizontally arranged. Furthermore, as shown in FIGS. 18a and 18b, a frame 39 may be provided for supporting a plug 21c within the second chamber 11b, the sidewalls of the frame 39 containing the stop surfaces 52 that are engaged by the projections 22 on the locking plates 13 and 14.
In the embodiment of FIGS. 6a and 6b, the cantilevered locking plates 24a and 24b are formed of synthetic plastic material, and are supported at their common ends by a sleeve member 70 that is inserted within the through bore 54 of the adapter body 2. In the embodiment of FIGS. 7a and 7b, the metal locking plates 28a and 28b are integral with the metal adapter body 2.
While in accordance with the provisions of the Patent Statutes, we have illustrated and described the best form and embodiments of the invention now known to us, it is apparent that changes may be made without deviating from the inventive concepts set forth above.
Patent Grant
7326073
