SEALED ELECTRICAL CONNECTOR

Abstract: An electrical connector (10) is composed of a main body (11, 12) mounting an electrical socket (26) and a cover (13) pivotably mounted to the main body (1, 12) and capable of closing off the interior region of the connector in the vicinity of the socket from the surroundings. The cover (13) and the main body (11, 12) have complementary tapered mating regions (22, 33, 35) opposite the pivot joint (46, 45) resembling a fish tail. The mating region of the cover (13) has a pair of cantilevered resilient arms (41) with apertures (43) which interengage as a snap-fit with detents (31) set in recesses (30) in the mating region of the main body. To release the arms (41) they can be gripped from the sides between a thumb and a first finger and squeezed together. Elastomeric sealing members (28, 36) are mounted into the mating regions of the cover and the main body to trap and seal around a cable of a plug filled into the socket when the cover is closed and a further seal (27) serves to seal the rim of the cover (13) to the main body.

Description: SEALED ELECTRICAL CONNECTOR BACKGROUND OF THE INVENTION FIELD OF THE INVENTION The present invention relates to an electrical connector particularly for use outdoors or in other environments where the connector is likely to be subjected to contact with water or moisture. PRIOR ART One example of a known connector of the type with which the invention is concerned is described in GB-A-2269485 SUMMARY OF THE INVENTION As is known from GB-A-2269485 an electrical connector constructed in accordance with the invention comprises a main body or housing containing an electrical fitment, such as a socket, a cover which is pivotably mounted with a pivot joint to the main body and can adopt an open position permitting access to the fitment or a closed position where the socket and a plug and cable connected to the socket is sealed from the surroundings inter alia with the aid of elastomeric sealing members which serve to trap and seal the plug cable when the cover is closed. In accordance with the invention, and in contrast to GB-A-2269485, the cover and the main body have outwardly projecting mating regions opposite the pivot joint which are of reduced transverse dimension relative to the remainder of the connector, the elastomeric sealing members are mounted in the mating regions of the main body and the cover, the mating regions are equipped with cantilevered resilient arms which provide snap-fitting connection between the cover and the main body when the cover is closed, the cantilevered arms being grippable for displacement from the sides of the connector to release the snap- fitting connection. Preferably the elastomeric sealing members are made from polyurethane resin. One of these members, preferably that carried by the cover and urged against the cable when the cover is closed, can be softer than the other sealing member which is mounted in the main body Where a switch is used as the electrical fitment access for a cable between the cover and the main body is unnecessary In this case, only one elastomeric sealing member need be provided between the mating regions and this member may engage with a suitable seating Preferably the sealing created by the sealing member or members is supplemented by another seal around the edge ofthe cover. The mating regions of the lower and main body may taper progressively and smoothly inwardly away from the pivot joint to resemble a fish tail The main body can be provided with recesses containing detents in the form of ramp-like projections and the recesses are positioned to receive the cantilevered arms on the cover The arms on the cover can then have apertures adapted to interengage with the detents to form the snap-fitting connection Preferably the cantilevered arms are spaced apart to an extent so that they can be gripped between a thumb and a finger of a user and squeezed together to release the snap-fitting connection. The invention may be understood more readily, and various other features of the invention may become more apparent, from consideration ofthe following description. BRH.F DESCRIPTION OF THE DRAWINGS. An embodiment of the invention will now be described by way of example only, with reference to the accompanying drawing wherein: Figure 1 is a front view of an electrical connector constructed in accordance with the invention with the cover in a fully open position and Figure 2 is a side view ofthe connector shown in Figure 1. DETAILED DESCRD7TION OF THE PREFERRED EMBODIMENT As shown in the drawing, an electrical connector 10 constructed in accordance with the invention is composed of a mounting block 11, an intermediate connector block 12 and a hinged cover 13 all molded from rigid synthetic plastics. The mounting block 11 is rectangular and would be fixed to a mounting surface with screws passing through a rear closure wall ofthe block 11 in a known manner. A cable would be guided into the block 11 with the aid of a screw-threaded sealable coupling (not shown). The top and bottom walls 14,15 of the block 11 have apertures enabling the coupling to be located at the top or bottom. The aperture which is not used would be closed off with a removable plug (not shown). The connector block 12 has side walls 16, 17 and top and bottom walls 18,19 co-planar with the corresponding walls of the block 1 1. Screws 20 engaging in bushings held in the block 11 serve to secure the blocks 11,12 together and a seal 21 is provided between the mating surfaces ofthe blocks 11,12 which combine to form a base for the cover 13. The block 12 is equipped with a reduced width depending portion or region 22 projecting below the bottom walls 15,19 and as shown the block 12 has a perimeter wall 23 with inwardly inclined regions 24 defining the portion 22 A transverse wall 25 of the block 12 serves to mount a conventional 3 pin electrical socket 26 as illustrated The cable guided into the block 1 1 via the sealable coupling is used to connect with the socket interiorly ofthe wall 23 The wall 23 has a groove into which grooved elastomeric seal 27 is seated The block 12 can mount other types of socket 26 e g a two-pin socket or a socket with round pins or some other electrical fitment, such as a switch Conveniently the block 12 is adapted to receive a vanety of electrical fitments in the same location opening An elastomenc sealing member 28 is fitted into a recess in a base end region 29 of the wall 23 This end region 29 is also equipped with further recesses 30 containing internal detents in the form of ramp-like projections 31 and with a semi-circular cut-out 32 The top end region of the wall 23 opposite the region 29 has a raised shroud 33 projecting around the socket 26 The cover 13 has a shaped front closure wall 42 extending between spaced-apart inner and outer perimeter walls 34,35 which are partly shaped to define a mating region which corresponds to and mates with the depending portion 22 of the block 12 The outer wall 34 has an outer surface shaped to merge smoothly with the outer surface of the wall 23 ofthe block 12 when the cover 13 is closed The inner wall 35 is designed to engage in the seal 27 when the cover 13 is closed The inner wall 35 ofthe cover 13 also combines with an inwardly extending formed section on the inside of the wall 42 to define a recess or pocket for receiving an open tough-like housing containing a second elastomeric sealing member 36 located in a complementary position to the first member 28 The housing can be press-fitted in the pocket and the sealing member 36 can be likewise press fitted in the housing. A lower end wall 37 of the cover 13 adjoins side regions ofthe wall 35 partly defining the recess or pocket and a semi-circular cut-out 38 in the wall 37 is located in a complementary position to the cut-out 32 Spaced from the side regions ofthe wall 35 and from the wall 34 with slots 40 there are cantilevered arms 41 which can be resiliently displaced inwardly in the direction of arrows A The arms 41 merge into a shaped front closure wall 42 of the cover 13 The arms 41 are equipped with apertures 43 designed to interengage as a snap fit with the projections 31 in the recesses 30 The cover 13 is pivotably connected at the top of he block 12 For this purpose the block 12 has a recess 44 which receives spaced apart support arms 45 of the cover 13 and a pivot pin 46 extends across the recess 44 and through the arms 45 During use when an electrical plug is mated with the socket 26 the cable connected to the plug extends over the sealing member 28 As the cover 13 is swung about the pivot joint 45,46 (arrow B) the member 36 squeezes against the cable and the member 28 Pressure exerted on the mating lower regions of the cover 13 and the block 12 will cause the arms 41 to deform toward one another as they ride over the projections 31 until the projections 31 automatically snap into the apertures 43 The cover 13 is then releasably locked to the block 12 with the cable trapped between the members 28,36 and sealed thereby The engagement of the cover wall 35 within the seal 27 completes the sealing of the interior of the connector 10 To release the cover 13 a user can squeeze the arms 41 together quite easily, say between a finger and thumb, to release the projections 31 from the apertures 43 to permit the cover 13 to be pivoted outwardly When the plug and its cable are removed from the socket 26 the sealing members 28,26 engage on one another over an extended contact area and this combines with the grooved seal 27 to maintain the interior of the connector sealed when the cover 13 is closed In a preferred design of the type illustrated the members 28.36 are made from two materials one relatively soft and carried by the cover 13 and the other relatively hard and serving to seat in the housing in the reception recess. A preferred material for one or both the members 28,36 is polyurethane resin In the case where the socket 26 is replaced by an electrical fitment such as a switch which obviates the need for a cable to be introduced between the cover 13 and the body 1 1, 12 the cover 13 can be opened to permit access to the switch or fitment or closed to seal off the fitment from the surroundings. In this case the dual sealing member 28,29 aie replaced by a single sealing member 28 or 29 which engages with a suitable seating surface when the cover is closed. The rim ofthe cover 13 is still sealed with the grooved^ seal 27.

Claims: CLAIMS 1 An electrical connector (10) comprising a main body or housmg (11,12) containing an electrical fitment (26), a cover (13) pivotable mounted with a pivot joint (45,46) to the main body so as to be capable of adopting an open position permitting access to the fitment or a closed position wherein the fitment is sealed from the surroundings inter alia with the aid of at least one elastomeric seal when the cover is closed, characterised in that the cover (13) and the main body (11,12) have outwardly projecting mating regions (22,33,35) opposite the pivot joint which are of reduced transverse diversion relative to the remainder of the connector, the elastomeric seal (28,36) is mounted in one of the mating regions ofthe main body and the cover and the mating regions are equipped with cantilevered resilient arms ( 1) which provide a snap-fitting connection between the cover (13) and the main body (1 1,12), when the cover is closed, the arms being grippable for displacement from the sides ofthe connector to release the snap-fitting connection 2 An electrical connector (10) comprising a main body or housmg (11.12) containing an electrical socket (26), a cover (13) pivotable mounted with a pivot joint (45,46) to the main body so as to be capable of adopting an open position permitting access to the socket or a closed position wherein the socket and a plug and cable connected to the socket is sealed from the surroundings inter alia with the aid of elastomeric sealing members which serve to trap and seal the plug cable when the cover is closed, characterised in that the cover (13) and the main body (11,12) have outwardly projecting mating regions (22,33,35) opposite the pivot joint which are of reduced transverse diversion relative to the remainder of the connector, the elastomeric sealing member (28,36) are mounted in the mating regions of the main body and the cover and the mating regions are equipped with cantilevered resilient arms (41) which provide a snap-fitting connection between the cover (13) and the main body (11,12), when the cover is closed, the arms being grippable for displacement from the sides of the connector to release the snap-fitting connection 3 A connector according to claim 1 or 2, wherein both the mating regions (22,33,35) taper progressively inwardly in a direction away from the pivot joint to resemble a fish tail 4 A connector according to claim 1,2 or 3, wherein the or each seal or sealing member (28,36) is made from polyurethane resin 5 A connector according to any one of claims 1 to 4, wherein there are two sealing members (38,36) between the mating regions and the sealing member (36) in the mating region of the cover (13) is softer than the sealing member (38) in the mating region of the main body ( 11 , 12) or vice versa 6 A connector according to any one of claims 1 to 5, wherein the main body is composed of a mounting block (11) remote from the cover (13) and an intermediate block (12) fixed to the mounting block and serving to mount the socket (26) 7 A connector according to any one of claims 1 to 6, wherein the cantilevered arms (41) are provided on the cover (13) the main body (11,12) is provided with recesses (30) containing detents (31) in the form of ramp-like projections and wherein the arms (41) have apertures (43) adapted to interengage with the detents to form the snap-fitting connection 8 A connector according to any one of claims 1 to 7, wherein the main body (11,12) has a transverse wall (25) in which the fitment or socket (26) is mounted, a grooved elastomeric seal (27) extends around part ofthe transverse wall and the cover has a wall (35) which engages in the grooved elastomeric seal when the cover is closed. 9. A connector according to claim 8, wherein the cover has inner and outer peripheral walls (34,35) and the wall which engages in the grooved seal is the inner peripheral wall (35) 10 A connector according to claim 2 or any one of claims 3 to 9 when appended to claim 2, wherein the mating regions of the cover (13) and the main body (11,12) have semi-circular cut-outs (38,32) which enclose the plug cable when the cover is enclosed

Inventors: JOLLIFFE PETER DOUGLAS JAMES, JOLLIFFE, PETER, DOUGLAS, JAMES
Applicants: JOLLIFFE PETER DOUGLAS JAMES, LOBLITE LTD, JOLLIFFE, PETER, DOUGLAS, JAMES, LOBLITE LIMITED
Application year: 1996
Main classification: H01R13
IPC codes: H01R13, H02B1