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
  • H01R13/02—Contact members
  • H01R13/15—Pins, blades or sockets having separate spring member for producing or increasing contact pressure
  • H01R13/18—Pins, blades or sockets having separate spring member for producing or increasing contact pressure with the spring member surrounding the 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
  • H01R13/02—Contact members
  • H01R13/193—Means for increasing contact pressure at the end of engagement of coupling part, e.g. zero insertion force or no friction
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
  • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
  • H01R11/18—End pieces terminating in a probe
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
  • H01R12/70—Coupling devices
  • H01R12/82—Coupling devices connected with low or zero insertion force

Definitions

• the present invention relates to the technical field of electrical connection systems of electrical devices for vehicles, used at high temperature, such as, for example, spark plugs, actuators or measuring sensors.
• the object of the invention relates more particularly to an electrical connection system for an electrical device for measuring physical parameters or components in the exhaust gases such as temperature, mass of particles, gas composition, etc.
• the object of the invention finds a particularly advantageous application in the field of measurement of soot in the exhaust gas.
• US Pat. No. 5,246,562 discloses a device comprising in a metal tubular body, a detector in the form of an elongated dielectric component having a distal portion provided with at least one electrode forming a measuring cell.
• This measuring cell is electrically connected to electrical contact pads arranged at the proximal portion of the detector.
• This device also comprises a system for electrical connection of the detector to an electrical connection beam.
• Such a connection system comprises two dielectric half-shells mounted vis-a-vis and between which is engaged the proximal portion of the detector. Electrical contact tabs with the pads are interposed between at least one half-shell and the detector and are electrically connected to the connecting beam. The two half-shells are held in position by means of a spring ring.
• the present invention therefore aims to overcome the drawbacks of the state of the art by proposing a new electrical connection system for a vehicle of simple design and limited space, used at high temperature, adapted to provide a long-lasting electrical connection with the electrode of the dielectric component, whatever the vibratory constraints experienced by such an electrical device.
• the electrical connection system for vehicles between electrical contact pads arranged at the proximal portion of an elongate dielectric component and an electrical connection harness comprises:
• two dielectric half-shells mounted facing each other to present on one side, a distal part and on the opposite side, a proximal part, the proximal part of the component being engaged between the half-shells, on the side of the distal part;
• the half-shells comprise at the proximal portion a pivot so that the half-shells open angularly relative to each other in the direction of the distal portion, the spring ring surrounding the half-shells at the proximal part to hold them in the angular opening position,
• the half-shells have externally together, at the distal portion, a bearing surface for a tubular body ensuring the approximation of the half-shells to ensure the electrical contact between the contact tongues and the pads.
• the spring ring is mounted on the half-shells so that the half-shells and the spring ring are mounted inside the tubular body.
• the spring ring is mounted in a clearance arranged externally on the half-shells.
• the half-shells delimit between them, at the proximal portion, a contact zone forming the pivot.
• the contact tongues comprise at least each a spring portion biased by a half-shell.
• the contact tongues comprise at least one ductile part each.
• the half-shells delimit between them a receiving housing of the proximal portion of the component, having a stop for said component.
• the contact pads are electrically connected to at least one electrode carried by the detector.
• the contact tabs extend outside the half-shells, on the side of the proximal portion, to allow their connection to the connecting beam.
• the half-shells comprise at their distal part, an engagement aid chamfer for the tubular body.
• Another object of the invention is to propose an electrical connection system according to the invention, between a connection beam electrical and an elongated dielectric component forming a particular detector of soot in the exhaust gas.
• Another object of the invention is to provide an electrical device for a vehicle, comprising an electrical connection system according to the invention, between an electrical connection beam and a spark plug.
• Figure 1 is a partially cutaway perspective view of an exemplary embodiment of an electrical device according to the invention.
• Figure 2 is an exploded view of the device shown in FIG. 1.
• Figures 3 to 5 are partial elevational sectional views showing three steps of assembly of the electrical device according to the invention.
• Figure 6 is an elevational sectional view showing another embodiment of a device according to the invention.
• FIGS. 1 to 5 discloses an electrical device 1 for a vehicle intended to constitute a sensor for measuring physical parameters in the general sense or components in the exhaust gases such as temperature, mass of particles, gas composition.
• the device 1 is a sensor for measuring the soot in the exhaust gas.
• Such an electrical device 1 comprises a metal tubular body 2 preferably having a circular cross section.
• the electrical device 1 also comprises an elongated dielectric component 3 which in the example illustrated is a detector in the form of an elongate plate of generally rectangular shape.
• this dielectric wafer 3 is made of ceramic.
• This detector 3 has a distal portion 3i and, on the opposite side, a proximal portion 3 2 - This detector 3 is provided at its distal portion 3i with at least one electrode 5 constituting, in the exemplary embodiment illustrated, a measuring cell electrically connected to electrical contact pads 7 arranged at the proximal portion 3 ⁇ of the wafer and the number of two in the example illustrated in FIGS. 1 to 5.
• the measuring cell 5 is made appropriately according to the intended application.
• this measuring cell 5 may comprise two electrodes between which the quantity of soot deposited is measured.
• This measuring cell 5 is electrically connected to the contact pads 7 by means of electrical connections 8 preferably made by electrical conductive tracks arranged on and / or in the dielectric wafer 3.
• the measuring cell 5, the conductive tracks 8 and the contact pads 7 are carried by a main face 3a of the detector 3.
• the detector 3 is provided, at its distal portion 3i of a resistor located opposite the measuring cell to regenerate this cell.
• This heating resistor is electrically connected by conductive paths 8 to the electrical contact pads 7 arranged to the proximal Part 3 2 of the detector 3.
• this heating resistor, the conductive tracks 8 and the contact pads 7 are arranged on the opposite main face 3b of the main face 3a carrying the measuring cell 5.
• the electrical device 1 comprises an electrical connection system 11 providing an electrical connection between the electrode 5 and an electrical connection beam 12.
• the electrical connection system 11 comprises two dielectric half-shells 14 mounted in screws so as to have a transverse cross section corresponding to the transverse cross section of the metal tubular body 2.
• each dielectric half-shell 14 thus has a semi-circular cross section.
• Each dielectric half-shell 14 thus has a flat part 15 connected to a semi-circular outer casing 16.
• the half-shells 14 are arranged so that their flats 15 are in facing relation to each other. look at each other so that the half-shells 14 together have a circular shape.
• the dielectric half-shells 14 have, on one side facing the distal portion 3i of the detector, a distal portion 14i and on the opposite side a proximal portion 14 2 .
• the proximal portion J 2 of the detector 3 is engaged between the two half-shells 14 on the side of the distal portion 14i. More precisely, the detector 3 is engaged between the two flats 15 of the two half-shells 14.
• the half-shells 14 delimit between them, a housing 17 for receiving the proximal portion 3 2 of the detector 3, arranged from the distal portion 14i of the half-shells 14.
• This housing 17 is arranged in the flats 15 of the half-shells 14 and thus defines by its bottom, a stop 18 for limiting the engagement of the detector 3 inside the half-shells 14.
• the electrical device 1 also comprises electrical contact tabs 19 with the pads 7 of the detector 3. These contact tabs 19 are interposed between at least one half-shell 14 and the detector 3. In the example illustrated in FIGS. 1 to 5, two electrical contact tabs 19 are mounted side by side between a face of the detector 3 and a half-shell 14. Of course, it may be envisaged to mount a different number of electrical contact tabs. For example, it can be envisaged as illustrated in FIG. 6, to also mount one or two electrical contact tabs 19 between the other face of the detector 3 and the other half-shell 14. Each contact tab 19 is in contact with a pad 7 of the detector 3 and is connected in such a way appropriate for the electrical connection harness 12.
• each contact tongue 19 is held in position within a groove 20 formed in the flat portion 15 of the half-shell 14, the distal portion 14i to the proximal portion 14 2 .
• the contact tabs 19 extend outside the half-shells 14, on the side of the proximal portion 14 2 to allow it to be connected to the electrical connection harness 12.
• the contact tongues 19 may have a length less than the length of the half-shells 14 so that the connection with the connection harness 12 can be made within the half-shells 14. shells 14.
• each contact tongue 19 comprises at least one spring portion 19i which advantageously is in contact with a contact pad 7.
• each contact tongue 19 is a flat element provided with a semicircular portion forming the spring portion 19i and having a height greater than the depth of the groove 20 to be in contact with a stud 7. It should be noted that each contact tongue 19 may present in place of a spring portion, a ductile portion or deformable.
• the electrical connection system 11 also comprises a spring ring 21 surrounding the half-shells 14 to ensure their retention in position.
• the spring ring 21 is made in the form of an open ring surrounding the two half-shells 14.
• the half-shells 14 comprise at the proximal portion 14 2 , a pivot 23 so that the half-shells 14 open angularly relative to each other in the direction of the distal portion IA 1 .
• the spring ring 21 surrounds the half-shells 14 at the proximal portion 14 2 so that the half-shells 14 are held tight and rest against each other on the proximal portion of the flats 15 thus forming the pivot 23.
• the side of the distal portion 14i with the interposition of the contact tongues 19 between the detector 3 and one or both half-shells 14, these two half-shells 14 are not parallel to each other.
• the half-shells 14 are thus in contact with one another at the proximal portion of the flats 15 (pivot 23) under the action of the spring ring 21 while the half-shells 14 do not are not in contact at the distal portion 14i.
• the two half-shells 14 thus have between them an angle whose apex is formed by the pivot 23.
• the half-shells 14 have at the distal portion 14i a diameter greater than the internal diameter of the metal tubular body 2.
• the portion 14i of the half-shells 14 delimit a bearing surface for the tubular body 2 to bring the half-shells 14 closer to ensure electrical contact between the contact tongues 19 and the pads 7.
• the half-shells 14, comprise at the distal portion 14i, an engagement aid chamfer 25 for the tubular body 2.
• the spring ring 21 surrounds the half-shells 14 to maintain them in position, while the tongues of the contact 19 are engaged between the two half-shells 14.
• the engagement of the detector 3 from the distal portion 14i of the half-shells 14 shells 14 leads to the pivoting of the two half-shells 14 which remain in contact or in contact around the pivot 23 under the action of the spring ring 21.
• the contact tongues 19 have a deformable portion, it should be noted that the contact tabs 19 exert a force tending to open the two half-shells 14. In this premounting position, the two half-shells 14 have at their distal portion 14i a diameter greater than the diameter of the internal bore of the tubular metal body 2.
• the insertion of the metal tubular body 2 from the distal portion 14i of the half-shells 14 leads to the tightening or approximation of the half-shells 14 at the distal portion W 1 .
• the insertion of the tube 2 thus stresses the contact tongues 19 with the studs 7.
• the fact of exerting a tightening only on the proximal portion 14 2 of the half-shells makes it possible to limit the contact zone between the half-shells 14 and the metal tubular body 2 thus promoting assembly.
• the spring ring 21 is mounted on the two half-shells, so that the two half-shells 14 and the spring ring 21 are mounted inside the tubular body.
• the spring ring 21 is mounted in a recess 26 arranged externally on the half-shells 14.
• the spring ring 21 is established substantially in the extension or recessed relative to the outer casing 16.
• the outer casing 16 is a smooth surface so that the surface with the external bore of the tube 2 is a continuous surface.
• it can be provided to make on the periphery of the outer casing 16 pins or projections so as to ensure a multi-point contact with the internal bore of the tube 2.
• the device 1 is a measurement sensor especially for exhaust gas so that the dielectric component 3 is a detector.
• the connection system 11 may be intended to equip an electrical device different from a measuring device.
• the electrical connection system can provide the electrical connection between a connection harness and a spark plug or heater.

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• Measuring Oxygen Concentration In Cells (AREA)
• Coupling Device And Connection With Printed Circuit (AREA)

Applications Claiming Priority (2)

Publications (2)

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Family Applications (1)

Country Status (4)

Cited By (1)

Families Citing this family (5)

Family Cites Families (11)

• 2009
  • 2009-07-09 FR FR0954749A patent/FR2947962B1/fr not_active Expired - Fee Related
• 2010
  • 2010-07-07 EP EP10742216.4A patent/EP2452403B1/de active Active
  • 2010-07-07 WO PCT/FR2010/051432 patent/WO2011004121A1/fr active Application Filing
  • 2010-07-07 US US13/383,172 patent/US8579634B2/en not_active Expired - Fee Related

Non-Patent Citations (1)

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