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
  • H01R13/46—Bases; Cases
  • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
  • H01R13/521—Sealing between contact members and housing, e.g. sealing insert
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
  • H05K5/00—Casings, cabinets or drawers for electric apparatus
  • H05K5/0026—Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units
  • H05K5/0069—Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units having connector relating features for connecting the connector pins with the PCB or for mounting the connector body with the housing

Definitions

• the invention relates to any device, such as connectors, electronic boxes, and more generally any apparatus comprising a body which carries one or more connecting pins, and whose sealing of the connection between the pin and the body is critical. .
• gas injectors which comprise a membrane actuated by an electromagnet electrically powered via connection pins which project from the body of the injector.
• the body of the injector is generally molded or injected and covers a portion of the spindle so as to form an interface between the body and the spindle. This interface is not completely sealed, and the pressurized gas present in the injector can leak out via this interface. It has been thought to have a seal between the body and the spindle, but this provision can be applied in practice only circular section pins.
• the object of the invention is to improve the seal between the pins and the body which carries these pins, including in the case of non-circular section pins.
• a device having a body which carries at least one connecting pin, wherein the pin comprises a portion covered with a sleeve having a circular cylindrical outer surface, the sleeve being fixed in a pin-tight manner and extending into a housing of the body delimited by a circular cylindrical wall, a seal sealing being disposed between the outer surface of the sleeve and the wall defining the housing.
• the invention also relates to a method of manufacturing such a device, comprising the steps of: - threading a sheath on the spindle and stop longitudinally the sleeve relative to the spindle; and
• FIG. 1 is a side view of a gas injector cover according to the invention partially in section along the line I-I of Figure 2 at one of the pins;
• FIG. 2 is a front view of the lid of the injector of FIG. 1;
• FIG. 3 is an enlarged partial view of Figure 1, at the sheath;
• FIG. 4 is a front view of a pin and a sleeve during the securing step of the sleeve on the spindle;
• FIG. 5 is an enlarged sectional view along the line V-V of FIG. 4.
• the gas injector cover comprises a body 1 which comprises a lower part adapted to be mounted on the injector proper, not shown here.
• the body 1 of the lid encloses an electromagnet (not visible) serving to actuate a movable element of the injector, for example a membrane.
• the body 1 comprises a portion shaped as a connector 2 in which connection pins extend.
• Each of the pins 3 has a free portion
• the sheath 6 is threaded onto the spindle 3 and welded thereto at the connecting portion 5 by means of a solder alloy which extends so as to completely fill the space between the sheath 6 and the spindle 3 and thus seal the connection between the sheath 6 and the pin 3.
• a solder alloy which extends so as to completely fill the space between the sheath 6 and the spindle 3 and thus seal the connection between the sheath 6 and the pin 3.
• it has the pin 3 in a mounting (not shown) which holds the pin 3 so that the free portion 4 extends vertically.
• the sheath 6 on the pin 3.
• the pin 3 has an extension 8 in the form of a butt on the base of which the sleeve 6 abuts, so that the sleeve 6 is naturally stopped opposite the connecting portion 5 of the pin 3.
• solder alloy ring 11 Thread on the pin 3 a solder alloy ring 11 so that it bears against the sleeve 6.
• the solder alloy ring 11 is heated (for example by means of a coil fed at high frequency arranged around the free portion of the spindle) so that the solder alloy melts and infiltrates by capillarity between the pin 3 and the sleeve 6.
• a chamfer 12 made on the sheath 6 facilitates the infiltration of the liquid solder alloy between pin 3 and sleeve 6.
• the sheath 6 is left free radially with respect to the pin 3 during the securing step so that the sleeve 6 is positioned radially with respect to the pin by the sole effect of the surface tensions in the molten solder alloy.
• the sleeve 6 has a rectangular inner wall 9 which is parallel to the outer surface 10 facing the pin 3.
• the weld alloy then forms between the sheath 6 and the spindle 3 a seal of constant thickness which guarantees a centering of the sheath 6 on the spindle 3 and ensures a homogeneous conduction of heat between the spindle. 3 and the sheath 6.
• the spindle 3 thus provided with its sleeve 6 is then placed in a mold and the body 1 is injected around the spindle 3.
• the material used is the body has an injection temperature lower than the melting temperature of the solder alloy, in order to prevent the sheath from becoming detached from the spindle during the injection of the body 1.
• the body is made of aluminum, we can use an alloy of tin and silver for welding the sheath on the spindle.
• the body 1 defines a housing 20 of revolution in which the sleeve 6 extends.
• the housing 20 has a first circular portion 21 opening on the outside, then, after a conical transition 22, a second circular portion of a smaller diameter delimited by a circular cylindrical wall 26 extending facing the outer surface 13 circular cylindrical sleeve 6.
• the housing 20 extends beyond the end of the sleeve 6 and has a bottom of which extends a central protrusion 24 which encloses a portion of the outer surface 13 of the sleeve 6, thus making the connection between the pin 3 and the body 1 more rigid.
• the protrusion 24 defines on the outer surface 13 of the sleeve 6 a preferably conical shoulder 25 which forms a seat for an O-ring 30 disposed between the outer surface 13 of the sleeve 6 and the wall 26 facing the housing 20.
• the O-ring 30 thus ensures a seal between the sheath 6 and the body 1.
• the portion of the housing 20 immediately adjacent to the shoulder 25 extending between the wall 26 and the central protrusion 24 forms a cavity 27 which is closed by the O-ring 30 and in which a certain amount of air is trapped during In practice, care will be taken to provide the cavity 27 with a volume large enough for the installation of the O-ring 30 not to cause the installation of the O-ring. in the cavity 27 that a slight increase in pressure of the air trapped in the cavity 27, so that this increase in pressure can not prevent pushing the O-ring 30 to the shoulder 25.
• an anti-extrusion ring 31 is disposed on the side of the O-ring 30 opposite the seat 25 , the anti-extrusion ring 31 being retained by an elastic spring washer 32 (particularly visible in Figure 2) which is pressed into the first portion 21 of the housing 20 and then forced against the conical transition 22 of the housing 20 so that the base of the petals is anchored by buttresses on the outer surface 13 of the sheath 6.
• the invention is not limited to what has just been described, but on the contrary encompasses any variant within the scope defined by the claims.
• the invention has been illustrated in application to a pin of non-circular section, the invention also applies to a pin of circular section, the sleeve allowing the use of an O-ring of more large dimensions that a seal adapted to the diameter of the spindle, so a priori easier to put in place.
• an external stop may be provided.
• sheath and the spindle are soldered by the addition of solder alloy, the sheath and the spindle can be secured using other bonding products, such as liquid glue. Other methods of sealing may also be used, such as for example a weld without adding material.
• the sheath is metallic, the sheath may be made of any other material, for example plastic.
• the inner wall of the sheath is parallel to the outer surface of the spindle, it can be provided on the sheath an inner wall of any shape.
• the body has been illustrated as enclosing a portion of the outer surface of the sheath, which allows a greater rigidity of the connection between the spindle and the body, the body may not enclose the sheath.
• the seat may be provided on the body to extend on the wall 26 defining the housing. The seat can still be formed on the outer surface of the sheath.
• the sleeve has been illustrated as extending into a housing opening from the body, the sleeve may extend into a non-opening housing. The seal should then be put in place from inside the body.

Applications Claiming Priority (2)

Publications (1)

Family

ID=34952544

Family Applications (1)

Country Status (6)

Families Citing this family (1)

Family Cites Families (3)

• 2004
  • 2004-11-30 FR FR0412664A patent/FR2878656B1/fr not_active Expired - Fee Related
• 2005
  • 2005-11-23 BR BRPI0516652-7A patent/BRPI0516652A/pt not_active Application Discontinuation
  • 2005-11-23 WO PCT/FR2005/002908 patent/WO2006058982A1/fr active Application Filing
  • 2005-11-23 CN CN200580040755.3A patent/CN101065887B/zh not_active Expired - Fee Related
  • 2005-11-23 EP EP05820740A patent/EP1836749A1/de not_active Withdrawn
  • 2005-11-23 RU RU2007124589/07A patent/RU2413346C2/ru not_active IP Right Cessation

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events