Patent Grant
7438589
The present disclosure relates generally to electrically powered accessories for motor vehicles and, more particularly, to an electrical connector and indicator system for motor vehicles.
Various electrically powered devices are designed for use with vehicles including automobiles, light-duty trucks and heavy-duty vehicles. The electrically powered devices include cold weather starting aids such as radiant heaters, engine block heaters, fluid heaters, battery warmers, and the like, and may be generally fixed to the automobile and operationally connected to an appropriate component of the vehicle engine. The operation of these devices generally occurs upon connection to a power source external to the vehicle. As such, a factor in the sales and use of these devices may be the simplicity with which the device can be electrically connected to the power source. To address this concern, cord sets have been developed that include a receptacle connected to the vehicle body for mounting an electrical cord that is connected to the electrically powered device. The power cords of the cord sets terminate at a male or female plug that is coupled to the receptacle. A counterpart plug external to the vehicle is selectively coupled to the receptacle to allow electrical connection of the device to the power source.
Cord sets for selectively electrically connecting an electrically powered automobile accessory to a power source are commercially available for use with heavy-duty vehicles today. Specifically, the assignee of the present disclosure and others have manufactured cord set receptacles that are generally cylindrical in shape and include a cylindrical housing open at one end to accommodate a male plug. The cylindrical housing may be normally closed at an opposite end by a spring biased cover.
The present disclosure relates to an electrical connector system for use with an electrically powered accessory mounted to a vehicle. The electrical connector system includes a connector adapted to be mounted to the vehicle as well as a cord having a first end adapted to be electrically coupled to the accessory and a second end having a plug. The plug is adapted to be electrically coupled to a power source remote from the vehicle, is removably coupled to the connector and includes a flexible finger having a tab engaging the connector. The electrical connector system also includes an indicator mounted to the connector and in electrical communication with the plug. The indicator is operable to provide a visual indication when electrical power is present at the plug.
Furthermore, an electrical connector system for use with an accessory mounted to a vehicle is disclosed. The electrical connector system includes a connector having first and second housings integrally formed with a plate. First and second plugs are adapted to be electrically coupled to a power source remote from the vehicle and removably coupled to the first and second housings, respectively. An indicator in electrical communication with the first plug is adapted to be mounted to the connector at a visible location and is operable to provide a visual indication when electrical power is present at the plug.
Further areas of applicability will become apparent from the description provided herein. It should be understood that the description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.
The present disclosure will become more fully understood from the detailed description and the accompanying drawings, wherein:
The following description of the preferred embodiment(s) is merely exemplary in nature and is in no way intended to limit the disclosure, its application, or uses.
A second cord set 34 has a first end 36 connected to a cab power system 38. Cab power system 38 may include a number of alternating current outlets located within the cabin of vehicle 10 to allow a user to power common household accessories such as video monitors and DVD players positioned within the vehicle cabin. A second end 40 of second cord set 34 terminates at a plug 42. Plug 42 is also coupled to dual entry connector 26. An auxiliary cord 44 includes a plug 46 for selectively interconnecting second cord set 34 to power source 32 via plug 42. Power source 32 provides alternating current for use in cab power system 38. It should be appreciated that auxiliary cord 28 may be used in cooperation with plug 42 instead of auxiliary cord 44. In use, zero, one or two auxiliary cords may be coupled to dual entry connector 26 depending on the electrical needs of the user.
Plate 56 includes a plurality of apertures 70 sized for receipt of fasteners (not shown). A gasket 72 is constructed from a resilient material and is operable to form a seal between plate 56 and a panel of exemplary vehicle 10. Gasket 72 includes apertures 74, 76 sized to allow housings 52, 54 to pass therethrough. Gasket 72 also includes additional apertures 78 sized and positioned to accept the fasteners extending through apertures 70.
Seals 79 are coupled to first and second covers 58, 60 to selectively engage housings 52, 54 to seal off cavities 67 and 68. Mechanical connections are made to couple plugs 22 and 42 to dual entry connector 26. Plugs 22 and 42 are coupled to housings 52, 54 in substantially the same manner. Accordingly, only one connection will be described in detail. Plug 22 includes a substantially cylindrically shaped body 80 having flats 82 and 84 formed thereon. Flats 82, 84 extend substantially parallel to one another on opposite sides of body 80. First and second fingers 86, 88 are integrally formed with body 80 and longitudinally extend from flats 82, 84, respectively. Each of the fingers 86, 88 includes a first end 90 fixed to body 80 and a second end 92 cantilevered and spaced apart from body 80. Fingers 86, 88 are preferably constructed from an elastomeric material that allows each finger to be deflected upon receipt of a force. When the force is removed, the fingers return to the unbiased positions shown in
First housing 52 and second housing 54 are substantially similar to one another. Accordingly, like reference numerals including prime suffixes are shown to represent like elements. For clarity, only first housing 52 will be described in detail. First housing 52 includes a first cylindrically shaped portion 100 and a second cylindrically shaped portion 102. Cylindrically shaped portion 100 includes an inner cylindrical surface 104 sized to receive plug 30 of auxiliary cord 28. Cylindrical portion 100 terminates at an end wall 106. Second cylindrical portion 102 extends from end wall 106 in a direction opposite from cylindrically shaped portion 100 and includes an inner cylindrical surface 108 having a diameter smaller than inner cylindrical surface 104. A land 110 radially inwardly extends from inner cylindrical surface 108 and acts as a stop to limit axial travel of plug 22 relative to dual entry connector 26. Second cylindrical portion 102 includes first and second transversely oriented apertures 112, 114 sized to receive tabs 94. Apertures 112 and 114 may be coaxially aligned with one another.
In the undeformed state shown in the Figures, tabs 94 radially outwardly extend a distance greater than the diameter defined by inner cylindrical surface 108. To couple plug 22 to dual entry connector 26, a user axially displaces plug 22 into second cylindrically shaped portion 102 of housing 52. During axial translation, angled surfaces 96 engage inner cylindrical surface 108 causing fingers 86, 88 to radially inwardly deflect. Deflection of fingers 86, 88 allows plug 22 to continue to enter second cylindrically shaped portion 102. As tabs 94 enter apertures 112, 114, fingers 86, 88 spring back to their undeformed state. Further axial travel of plug 22 in the insertion direction is limited by an end face 116 of plug 22 engaging land 110. Once tabs 94 are positioned within apertures 112, 114, axial travel of plug 22 in a direction attempting to separate plug 22 from dual entry connector 26 will be resisted by cylindrical surface 98 in engagement with the wall of apertures 112, 114.
If disconnection of first cord set 16 from dual entry connector 26 is desired, a user applies force to ends 92 of fingers 86, 88 to radially inwardly deflect tabs 94. Once tabs 94 are clear of second cylindrical portion 102, a user may axially move plug 22 relative to dual entry connector 26.
Plug 22 includes a male live terminal 120, a male neutral terminal 122, and a male ground terminal 124. Each of the terminals 120, 122 and 124 is electrically coupled to a wire. In particular, ground terminal 124 electrically conducts with a ground wire 126. Live terminal 120 is electrically and mechanically coupled to a supply wire 128. Live terminal 120 is also electrically coupled to a first lead wire 129 of indicator 24. A resistor (not shown) may be placed in series between live terminal 120 and indicator 24 as desired.
A neutral wire 130 is electrically coupled to neutral terminal 122. A second lead wire 132 of indicator 24 is electrically coupled to neutral wire 130. A first signal may be emitted from indicator 24 when power source 32 is electrically coupled to terminals 120, 122 and 124. Depending on the particular indicator wiring, indicator 24 may be a single color or a dual color light-emitting-diode (LED). If a dual color LED is implemented a circuit may be constructed such that the first signal corresponds to the LED emitting a green light. If current is flowing through plug 22 such as when accessory 14 is operating, a second signal is emitted from indicator 24. The second signal is a red light emitted from the LED.
Alternatively, the first signal may be a constantly illuminated lamp or LED. The second signal from indicator 24 may be a flashing light. One skilled in the art will appreciate that any number of different visual indications may be emitted from a single indicator 24. The various other signals are intended to be within the scope of the disclosure.
Plug 42 also includes a plurality of terminals electrically coupled to wires. Specifically, plug 42 includes a male live terminal 140 electrically coupled to a supply wire 142. A ground terminal 144 electrically conducts with a ground wire 146. A neutral terminal 148 is electrically coupled with a neutral wire 149. In the embodiment shown, each of terminals 140, 144 and 148 are shaped as male terminals. It is contemplated that female terminals and/or a combination of male and female terminals may be utilized without departing from the scope of the present disclosure. Plug 42 is substantially similar to plug 22. As such, like reference numerals having prime suffixes have been used to depict like elements.
Indicator 24 may be secured to first cover 58 with a threaded housing 150 and a nut 152. Housing 150 includes a substantially cylindrically-shaped hollow portion 154 and a radially enlarged portion 156. Nut 152 includes an internal thread threadingly engaging an external thread of portion 154 on threaded housing 150. Nut 152 is positioned within a pocket 158 formed on a downstanding flange 160 of first cover 58. Portion 154 extends through an aperture 162 extending through flange 160. Indicator 24 is positioned at the end of threaded housing 150 such that first and second lead wires 129 and 132 extend through housing 150 while a lamp portion 164 of indicator 24 protrudes outwardly from the end of threaded housing 150. Nut 152 secures indicator 24 to panel first cover 58 and positions lamp portion 164 to slightly protrude beyond nut 152. It should be appreciated that the mounting arrangement and positioning of indicator 24 relative to dual entry connector 26 is merely exemplary and that it is contemplated that indicator 24 may be mounted in any number of locations on external surfaces of the vehicle or within the passenger cabin.
A wire trough 170 (
Furthermore, the foregoing discussion discloses and describes merely exemplary embodiments of the present disclosure. One skilled in the art will readily recognize from such discussion, and from the accompanying drawings and claims, that various changes, modifications and variations may be made therein without department from the spirit and scope of the disclosure as defined in the following claims.
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