Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
  • H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
  • H01R13/405—Securing in non-demountable manner, e.g. moulding, riveting
  • H01R13/41—Securing in non-demountable manner, e.g. moulding, riveting by frictional grip in grommet, panel or base

Definitions

• the present invention relates to an electrical connector.
• the invention relates more particularly to an electrical connector of the type comprising a block of insulating material which comprises a series of parallel cylindrical cells opening out each of which receives an electrical contact, the generally cylindrical body of which has an external radial shoulder which s extends opposite an annular radial end surface which axially delimits a section of reduced diameter of the cell.
• each contact can be supplemented by a second external radial shoulder which extends opposite a second annular radial end surface which delimits the section of reduced diameter of the cell .
• each contact in its cell therefore directly depends on the relative dimensions of the shoulders and the diameters of the cell and on the reduced diameter section of the cell.
• D. M connectors Certain series of this type of connector, called “D. M” connectors, correspond to specifications which require certain very precise dimensions to be observed for the insulating block, and in particular for the dimensions of the cells as well as for contracts.
• the object of the invention is to propose an improved design of an electrical connector of the type mentioned above which makes it possible to increase the retention force. axial of the contacts without modifying the design and the dimensions of the cells.
• the invention provides a connector characterized in that the part of the cylindrical body of the contact which is received in the section of reduced diameter of the cell comprises an external radial collar which is mounted tightened radially in the section.
• the radial collar is frustoconical; - The peripheral edge of the collar has rotational immobilization notches;
• the cylindrical body of the contact comprises a second external radial shoulder which extends opposite a second annular radial end surface which axially delimits the section of reduced diameter of the cell.
• Fig ure 1 is a section view of a mode of production of an electrical connector in accordance with the teachings of the invention
• FIG. 2 is a detail view on a larger scale of the middle part of an electrical contact illustrated in Figure 1;
• FIG. 3 is a detail view and on a larger scale of the middle part of a corresponding cell.
• an electrical connector element 10 which, according to a known design, consists essentially of a metal shell in two parts 12 and 14 and by a block of insulating material 16 which is received in the cock uille 1 2.
• the block of insulating material 16 is delimited by a front transverse face 18 and by a rear transverse face 20.
• the block of insulating material 16 comprises a series of regularly distributed cells 22, which are all parallel and open into the two faces 18 and 20, and each of which receives an electrical contact element made of conductive material
• each electrical contact 24 is a male contact in one piece, the front free end 26 of which is in the form of a pin to be received in a complementary female contact (not shown ) whose front end is then hollow cylindrical, and whose rear free end 28 comprises for example a recess 30 intended to receive the end of a conductive wire (not shown) connected to the contact 24.
• a connector element comprising female contact elements (not shown)
• the block of insulating material 16 and the cells 22 extend into the part 14 of the cock.
• Each cell 22 is a cylindrical hole 32 with a longitudinal axis X-X with an internal diameter DU (see FIG. 3).
• each cell 22 has a section 36 of internal diameter DI2 less than the diameter DM.
• the section 36 is for example delimited axially towards the rear by a radial surface 38 which ends, radially inwards, by a chamfer 40.
• the section 36 is delimited axially towards the front by a radial end surface 42.
• each cell 22 is standardized dimensions.
• This middle part is delimited by a first external radial shoulder 46 and by a second external radial shoulder 48, the two transverse faces facing each other.
• the outside diameter DE1 of the middle part 44 of the electrical contact 24 is equal to 1.72 mm, that is to say that this part 44 is received radially with clearance in the section 36 of the socket 22.
• the shoulder 46 is of frustoconical shape so as to facilitate the insertion of the contact 24 into the socket 22, from left to right considering FIG. 1, and its largest outside diameter DE2 is such that: DE2> DI2 .
• the shoulder 48 is a cylindrical shoulder whose largest outside diameter DE4 is equal to 2 mm and therefore: DE4> Dl2. As illustrated in FIG. 1, in the mounted position, each contact 24 is thus retained axially in a socket 22, in both directions, due to the cooperation of the shoulder 46 with the surface 38 - 40 and of the cooperation of the shoulder 48 with the surface 42.
• the middle part 44 of each contact 24 comprises, located axially between the shoulders 46 and 48 and substantially midway between them, an external radial collar 54.
• the collar 54 is a frustoconical collar, the conicity of which is oriented in the same direction as that of the shoulder 46, to facilitate the insertion of the contact 24 into the cell 22, and whose largest outside diameter DE3 is such that:
• the outside diameter DE3 of the collar 54 is therefore greater than the inside diameter DI2 of the section 36 so that, in the mounted position, the collar 54 is tightened radially inside the section 36 of the cell 22.
• the different diameters meet the following conditions:
• the retaining or axial retention force of a contact 24 in its socket 22 is therefore increased because it results from the sum of the resistant forces due to the cooperation of one or other of the shoulders 46 or 48 plus the force resulting from the tight mounting of the collar 54 in the section 36.
• the peripheral edge 56 of the collar 54 includes a series of notches 58.
• Each contact 24 is mounted axially without play in the cell 22 because the distance LE, which is equal to 1.7 mm, is slightly less than the distance L1 which is equal to 1.8 mm.
• the arrangement of a collar 54 makes it possible to obtain an axial retaining force greater than 40 Newton and substantially equal to 50 Newton.
• the invention is not limited to the embodiment which has just been described, nor to the dimensions indicated.
• the directions of taper of the shoulder and collar can in particular be reversed so as to modify the direction of axial insertion of the contacts in the insulator and to modify the direction of the preponderant forces depending on the application.

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• Connector Housings Or Holding Contact Members (AREA)
• Fuel Cell (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9478860

Family Applications (1)

Country Status (5)

Citations (2)

• 1995
  • 1995-05-11 FR FR9505565A patent/FR2734087B1/fr not_active Expired - Fee Related
• 1996
  • 1996-05-03 ES ES96919866T patent/ES2137006T3/es not_active Expired - Lifetime
  • 1996-05-03 WO PCT/FR1996/000679 patent/WO1996036091A1/fr active IP Right Grant
  • 1996-05-03 DE DE69603434T patent/DE69603434T2/de not_active Expired - Fee Related
  • 1996-05-03 EP EP96919866A patent/EP0766876B1/de not_active Expired - Lifetime

Patent Citations (2)

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