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
  • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
  • H01R13/652—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding   with earth pin, blade or socket
• • 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
  • H01R13/58—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable
  • H01R13/5804—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable comprising a separate cable clamping part
  • H01R13/5812—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable comprising a separate cable clamping part the cable clamping being achieved by mounting the separate part on the housing of the coupling device
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
  • H01R24/28—Coupling parts carrying pins, blades or analogous contacts and secured only to wire or cable
  • H01R24/30—Coupling parts carrying pins, blades or analogous contacts and secured only to wire or cable with additional earth or shield contacts
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R2103/00—Two poles

Definitions

• the present invention relates to an electrical plug and in particular a plug of the English type.
• an electrical plug comprising a base which carries electrical connection pins, and an electrical supply cable, the electrical wires of which are connected to the electrical connection pins.
• Such an electrical plug must meet certain safety standards which require that the electrical power cable be secured to the base, the assembly of the cable and the base must withstand torsional, bending and tensile forces. exerted on the cable.
• the assembly of the electrical power cable and the base carrying the pins is carried out by overmolding of plastic material of the cable and the assembly of the rear face of the base on which the cable is previously positioned.
• the electrical supply cable is locally overmolded with a plastic material in order to constitute a grommet, this grommet then being fitted onto the base of the plug electric.
• the main drawbacks of these two abovementioned embodiments lie in the fact that they are complex and require an additional overmolding step in the manufacture of the electrical plug, which leads to an additional production cost.
• Document GB 2 273 006 discloses an electrical plug of the same type, in which a guide sleeve for the toothed cable is formed on the tail of the base, the teeth being offset relative to each other so as to wedge the cable. in this guide sleeve.
• the present invention provides a new electrical plug of the same type in which the connection of the electrical supply cable and the base is easily carried out with a single system. for a wide variety of different cables.
• the electrical plug according to the invention comprises a U-shaped connecting element fixed by complementary shape on the base, straddling the electrical power cable by pressing against it, in order to press against the base and secure it with the latter.
• the base has a bearing surface on which the electrical power cable is plate by means of the U-shaped connecting element, shaped to frictionally retain said power cable electric on the support surface.
• the combination of the U-shaped connecting element straddles the cable in the base, and the bearing surface capable of frictionally retaining said cable on said bearing surface, makes it possible to assemble the electric cable and the base securely in compliance with the safety standards imposed, while allowing relatively weak tightening of the cable by said connecting element.
• said support surface of the base includes notches transverse capable of frictionally retaining the electric power cable on said bearing surface.
• said bearing surface of the base has protruding pins capable of being inserted locally into the sheath of the electrical power cable to frictionally retain said cable on said bearing surface.
• the U-shaped connecting element comprises on its internal face intended to be applied against the electrical supply cable, at least one protruding pin, capable of being inserted locally into the sheath of said cable in a direction opposite to that of the pins on the bearing surface.
• each branch of the U-shaped connecting element comprises at least one tooth capable of hanging in a housing provided in the base close to the surface d support capable of receiving the cable from the support surface.
• Figure 1 is a partial schematic perspective view of the base provided with the pins of the electrical plug according to the invention, turned side front side.
• FIG. 2 is a schematic partial exploded perspective view of a first embodiment of the electrical plug according to the invention.
• FIG. 3 is an enlarged perspective view of the U-shaped connecting element of the electrical plug of FIG. 2.
• Figure 4 is a perspective view of the cover of the electrical plug according to the invention.
• FIG. 5 is a bottom view of the cover of FIG. 4.
• FIG. 6 is a sectional view along the plane A-A of the cover of FIG. 5.
• Figure 7 is a partial schematic exploded perspective view of a second embodiment of the electrical plug according to the invention.
• an electrical plug of the type English plug which includes a base 100 of molded plastic, which carries on its front face 101 three electrical connection pins 200, 300, 400 including a ground pin 200 and two identical phase or neutral pins 300, 400.
• the base 100 is molded onto the pins 200, 300, 400 so that they each have an electrical connection part 201, 301, 401 projecting from the rear face 102 of the base 100 .
• the electrical plug shown more particularly in FIG. 2 comprises an electrical supply cable 500, the electrical wires 501, 502, 503 (here partially shown) are intended to be connected to the connection pins 200, 300, 400.
• the electrical plug comprises a U-shaped connecting element made of molded plastic, and intended to be fixed by complementarity d - shape on the rear face 102 of the base 100, straddling the electric power cable 500, pressing against it in order to secure it with said base 100.
• this connecting element 600 which will be called “jumper” in the following of text, has two vertical branches 620, 630 capable of being engaged respectively in two housings 130, 140 provided in the base 100 on either side of said bearing surface 110 so that the internal face 610 of said jumper 600 is supported on said portion of the power supply cable 500 in order to press it against the bearing surface 110.
• a row of three teeth 621, 622, 623, 631, 632, 633 is formed on the external face of each branch 620, 630 of the jumper 600 giving each branch 620, 630 a rack profile.
• each tooth 621, 622, 623, 631, 632, 633 of each branch 620, 630 of the U-shaped connecting element 600 extends obliquely with respect to the longitudinal direction of said branch, in the direction of the base 640 of said connecting element 600.
• the housings 130, 140 provided in the base 100 for mounting the connecting element each have a recess 131, 141 of shape complementary to that of the teeth of said branches. The mounting of the jumper 600 on the base 100 is then carried out by the cooperation of a tooth of each branch with the complementary recess in the corresponding housing of said base.
• the jumper 600 can be mounted, via its branches having a rack profile, depending on the shape and / or the size of the electric cable used, in three different positions more or less close to the base, corresponding to the attachment of a pair of teeth in said housings provided on either side of the bearing surface of the base. It will be noted that, according to variant embodiments of the jumper, not shown, it can be envisaged that a greater or lesser number of teeth per row to allow a greater or lesser number of positioning of the jumper on the base.
• FIG. 3 it can be seen that the internal face 610 of the jumper 600, intended to be applied against the electric supply cable 500, is provided with a rib 61 1.
• this rib 61 1 sinks slightly into the sheath 510 of said cable, locally causing plastic deformation of the sheath 510, which contributes to maintaining the cable on the base 100.
• the bearing surface 110 of the base 100 intended to receive the electric cable 500, is provided with an orifice 12 positioned opposite the zone of application of the rib 61 1 of the jumper 600 on the cable 500.
• the bearing surface 110 of the base on which said portion of electric power cable 500 is applied is shaped so as to frictionally retain said portion cable on said bearing surface 110 once the jumper 600 is mounted on the base, straddling the cable.
• said bearing surface 110 includes notches 111 transverse to the longitudinal direction of the cable 500, distributed around the orifice 112 and on which the sheath 510 of the cable 500 is applied.
• the tail of the base 100 has a flared portion in seat 120 behind the bearing surface 1 10, shaped to optionally receive the cable stressed in bending, during the use of the electrical plug.
• the bearing surface 110 comprises projecting outwards a row of three pins 110a.
• pins 1 10a are able to sink into the sheath 510 of the electric cable 500 to deform it locally in order to frictionally retain said cable 500 on the bearing surface 1 10.
• the jumper 600 also has on the portion of its internal face 610 placed parallel in look of the bearing surface 110, a pin 601 projecting towards the cable, also able to sink into the sheath 510 of the electric cable 500 when said jumper is fixed on the base 100, straddling the cable. pin 601 of the cavlier 600 and the pins 1 10a of the bearing surface 1 10 sink into the sheath 510 of the cable 500 in opposite directions, thus forming a sort of clamping jaw.
• the bearing surface 1 10 has on each side a wall 110 ', 110 ".
• These parallel walls 1 10', 1 10" are made of a rigid plastic material and yet sufficiently flexible to be locally deform under the action of the ribs 61 1 of the jumper 610, when the latter is snapped into the housings 130, 140 of the base, so as to make the mounting of the jumper on the base impossible to dismantle.
• FIGs 4, 5 and 6, there is shown more particularly the closure cover 700 of the electrical plug according to the invention, intended to be mounted on the rear face 102 of the base 100, so as to cover the electrical connection electrical wires from the cable with the electrical connection pins.
• the closing cover 700 is a molded plastic part.
• this cover 700 carries on its internal face 700a four mounting rods 702, capable of engaging in corresponding holes provided in the base of the electrical plug.
• it comprises a tail portion intended to cover the tail of the base 100, and in particular a portion forming a support surface 710 complementary to the flared portion in seat 120 of the base, suitable for receiving the cable when '' it is subject to bending when using the electrical plug.
• the seat portions 710, 120 of the cover and of the base are positioned facing each other to form the rear outlet of the plug.
• the cover 700 has a wall 701 which extends, in the assembled position (see FIG. 6), from its internal surface 700a, in the direction of the base 100, so that when the cover 700 is mounted on the base 100, this wall 701 is positioned in front of said bearing surface supporting the cable and the transverse end edge 701 a of said wall 701 blocks the electrical wires emerging from the sheath of the cable against the base.
• This wall 701 then advantageously contributes to the maintenance of the cable on the base and makes it possible to isolate the stripped parts of the electric wires of the cable from the rear output of the electric boom.

Landscapes

• Connector Housings Or Holding Contact Members (AREA)
• Details Of Connecting Devices For Male And Female Coupling (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=9469700

Family Applications (1)

Country Status (5)

Cited By (1)

Families Citing this family (5)

Family Cites Families (8)

• 1994
  • 1994-12-12 FR FR9414916A patent/FR2728108A1/fr active Granted
• 1995
  • 1995-12-08 EP EP95941784A patent/EP0744088B1/de not_active Expired - Lifetime
  • 1995-12-08 WO PCT/FR1995/001635 patent/WO1996019019A1/fr active IP Right Grant
  • 1995-12-08 ES ES95941784T patent/ES2130689T3/es not_active Expired - Lifetime
  • 1995-12-08 DE DE69507597T patent/DE69507597T2/de not_active Expired - Lifetime

Non-Patent Citations (1)

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