Abstract:
A connector having a first module ( 1 ) carrying a lever ( 2 ) provided with at least one maneuvering arm ( 3 ), and a second module ( 4 ) provided with at least one stud ( 5 ). The lever ( 2 ) is provided with at least one stud reception aperture. The aperture has a stud introduction segment ( 7 ) and a stud stopping segment ( 8 ). The stopping segment ( 8 ) constitutes together with the stud ( 5 ) of the second module, an axis of rotation of the lever.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The invention relates to an electrical connector provided with a mating assistance device. Such connectors are used, in particular, for connecting an electrical harness which contains a large number of channels, to a piece of equipment such as an automotive computer, for example a computer which controls braking assistance devices and anti-wheel lock devices. Because of the large number of channels to be connected, such connectors comprise a large number of contacts, which make it necessary to exert a large amount of force to implement their mating. Such connectors comprise a plug, generally provided with female contacts to which are connected electrical cables and include a receptacle provided with pin contacts, the said receptacle generally being integral with the equipment to be connected. 
     2. Brief Description of Related Developments 
     Connector devices comprising a mating assistance device are known. 
     For example, document DE-U-87 14 016 relates to a plug-receptacle connector, where the plug is provided with a lever able to rotate about the axis of the plug, provided with a toothed part and with arms connected by a manoeuvring segment, the toothed part being destined to mesh with the supplementary teeth of the receptacle in such a way as to make possible the mating and unmating of the plug and the receptacle by means of the manoeuvring of the lever. 
     Document EP 0 273 999 A2 uses the principle of toothed lever, but this is arranged on the receptacle, rigidly connected to the receptacle by an axis of rotation and dragging a stirrup provided with reception and dragging ramps for dragging the studs arranged on the plug. 
     SUMMARY OF THE INVENTION 
     The present invention has the object of providing a connector comprising a sophisticated rotating device for mating assistance for an electrical connector, the said device providing better guidance of the plug and the receptacle during the process of mating and a better distribution of effort and pure rotation of the lever, as well as providing a large reduction of the efforts needed for the mating of the connector modules. 
     To accomplish this, the invention mainly relates to a connector comprising a first module carrying a lever, provided with at least one manoeuvring arm, a second module provided with at least one stud, the lever being provided with at least one stud reception aperture, the said aperture comprising a stud introduction segment and a stud stopping segment, the stud stopping segment constituting, together with the stud of the second module, an axis of rotation of the lever. 
     Advantageously, the lever and the first module comprise a supplementary means of dragging the first module by moving it in a direction parallel to a mating axis of the first and second modules. 
     The supplementary means of dragging can consist of a meshing toothed pinion on the lever and a rack bar on the first module. 
     More particularly, the lever can be received in a slide bar part, making possible a movement with respect to the lever and the first module in a direction parallel to the module mating axis and retaining the lever in an axis perpendicular to that direction. 
     According to a first embodiment of the invention, the lever and the first module can comprise supplementary means of temporary retention in a position called the stud reception position. 
     Still in accordance with the invention, the lever and the first module can comprise a means of locking into a position called end of mating. 
     In a particular mode of embodiment of the invention, the lever can comprise a telescopic manoeuvring component. 
     In a preferred mode of embodiment, the lever is a double lever, arranged to straddle the first module and comprising two apertures opposite one another, the second module comprising two studs arranged against one another in the same axis. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The invention will be better understood on reading the description which follows of a non-limitative embodiment example and referring to diagrams where 
     FIG. 1 is an exploded perspective view of a plug and receptacle connector according to the invention, before mating; 
     FIG. 2 is a perspective view of the connector from FIG. 1 before mating; 
     FIG. 3 is a perspective view of the mated connector from FIG. 2; 
     FIGS. 4 a  to  4   c  are schematic views of the kinematic of a manoeuvring device according to an embodiment of the invention. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     As can be seen FIG.  1  and according to the example under consideration, the connector comprises a first module  1  and a second module  4 . These connector modules have a supplementary engagement profile and receive contact elements and/or optical plugs. The contacts of the first module are, for example, strapped to cables emerging from a back part  20  of module  1 , the complementary contacts of the second module being able to be connected to a printed circuit or strapped to the cables. Module  1  consists of an envelope  100 , which receives a contact carrier  101  which may be provided with a primary contact locking device  102  and a secondary locking device  103  of these contacts. In the case of a sealed connector module, an assembly of joints  104  and  105  can be provided. The different elements constituting the module are assembled and the contacts are then inserted through a back wall  107  of the envelope  100 , A cover  110  can close the back of the first module, leaving a passage for the cables strapped to the contacts. 
     The first module  1  carries the rotating lever  2 . This lever makes it possible to effect the mating of the modules and is in the example shown of a double lever arranged to straddle the first module  1 , comprising two manoeuvring arms  3 ,  22 , strapped by a central strap  21  and comprising at their free end an actuating part provided with means which make possible an engagement with the second module and a traction of the first module towards the second module. The lever arms are received each in a seating comprising the walls  106 , which protect an actuating device, which will be described below. 
     The lever, which is always visible FIG. 1 comprises two arms  3 ,  22  connected by a central strap  21 . On one side of the arm  3  is located the central strap  21 . At the other end is the actuating part. This actuating part has the shape of a disc, whose at least one peripheral sector comprises a toothed pinion, the disc comprising on its face opposite the first module a aperture  6  comprising a rectilinear segment  7  open laterally on a section of the periphery of the disc and a semicircular profile segment  8  concentric with the toothed pinion. 
     The actuating part of the lever is received pressing against a slide bar wall  12  of the first module  1 , this slide bar wall enabling a movement with respect to lever  2  and the first module  1  in a direction parallel to the mating axis of the modules and retaining the lever in an axis perpendicular to that direction. The lever is guided in this slide bar and is able to turn. 
     The slide bar comprises two pillars parallel to the direction of mating of the modules. One of the pillars consisting of the slide bar wall  12  comprises a smooth profile against which the disc can support itself while the other pillar comprises a rack bar  11 , destined to be engaged by the teeth of the toothed pinion  10  carried by the disc. The guiding of the lever being performed by the support of a shroud  120  against the slide bar wall  12 . 
     The functioning of the mating assistance device will be described below. 
     The lever is first inserted onto the slide bar up to a pre-engagement position of the teeth in the rack bar  11 . The insertion of the lever is made possible by elastic deformation of the walls or flanges  106  as far as the end parts of the lever straps taking their place in the slide bars. It should be noted that the guidance elements such as the studs  13  can be provided, in cooperation with the sides  14  connecting the flanges  106  with the body of the first module, for guiding the lever when it is inserted. 
     In the inserted position, the lever has an angular orientation such that the opening, which terminates segment  7  is positioned opposite stud  5  of the second module  4 , when the first module is presented in the pre-insertion position with the second module. By pushing the first module into the second module, the stud enters into segment  7  until it arrives at the stopping segment  8 . 
     At that moment, it is possible to turn the lever, the stud  5  constituting in the stopping segment  8  an axis of rotation of the lever. The rotation of the lever takes place in a fixed axis of the second module, the teeth of the pinion pressing on the teeth of the rack bar which forces the insertion of the first module into the second module. For its part, the lever is only subject to a rotation movement with respect to the second module and thus remains in arc of a circle with respect to the second module. The relative positions of the lever and the modules before mating can be seen in FIG. 2, FIG. 3 for its part showing the mated connectors and the lever in the end of course position. To be able the better to distinguish the engagement device, the flanges  106  in FIG. 2 and 3 have been cut away. 
     Thus, once the lever is inserted in the slide bar, a rotation of the lever becomes converted into a longitudinal movement of the lever in the slide bar, following the engagement of the teeth of the pinion in the rack bar  11 . This system constitutes a supplementary means of dragging the first module in a direction parallel to a mating axis of the first and second modules. 
     The detailed functioning of actuating devices is visible FIGS. 4 a  to  4   c , which show a section of a lever according to the invention, in three positions, the insertion of the first module into the second module, the rotation and locking. The section is in the plan view of the central strap of the lever and show the part of the supplementary rack bar of the first module and the stud of the first module inserted in it reception aperture. 
     Also visible, particularly FIGS. from  4   a  to  4   c , supplementary means of temporary retention  13 , 14  in a position called the stud reception position, can advantageously be provided between the lever  2  and the first module  1 . These means can consist of a simple dimple  13  on the envelope, the dimple against which the arm abuts. These means can also comprise elastic means of retention such as lug device received in a seating. 
     Similarly, the lever and the first module can comprise means of locking  15 , 17  in a position called end of mating. These means can be a dimple  15  located on a portion of a guide rail  30  of an arm element as described in FIG. 4 or can consist of a dimple  17 , retaining the arm  3  at the end of course of the lever, as shown in FIGS. 2 and 3. 
     In a particular mode of embodiment shown FIGS. 4 a  to  4   c , and FIGS. 2 and 3, the lever can comprise a telescopic manoeuvring element  16 . This telescopic element makes it possible to increase the lever arms whilst preserving a small size of the connector. This telescopic element consists of arms  27 , 30 , connected by a central strap  36 , the arms being mounted on slide bars on arms  33 , 34  of two lever elements in this separate case. 
     The telescopic element of manoeuvre can be guided by a curved rail  30 , for example on a cover  110  closing the back of the first module, a rail guiding the lever in its movement and controlling the extension and the retraction of the telescopic element in concert with the guidance studs  31 , 32 . 
     The unlocking and unmating of the modules takes place by the reverse movement of the lever.