Patent Publication Number: US-10773724-B2

Title: Accessory system for vehicle

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     The present application is a continuation of U.S. patent application Ser. No. 14/263,074, filed Apr. 28, 2014, now U.S. Pat. No. 9,266,474, which is a continuation of U.S. patent application Ser. No. 14/021,474, filed Sep. 9, 2013, now U.S. Pat. No. 8,710,969, which is a continuation of U.S. patent application Ser. No. 12/753,433, filed Apr. 2, 2010, now U.S. Pat. No. 8,531,278, which a division of U.S. patent application Ser. No. 12/354,339, filed Jan. 15, 2009, now U.S. Pat. No. 7,719,408, which is a continuation of U.S. patent application Ser. No. 11/201,661, filed Aug. 11, 2005, now U.S. Pat. No. 7,480,149, which claims benefit of U.S. provisional application Ser. No. 60/522,123, filed Aug. 18, 2004, which are hereby incorporated herein by reference in their entireties. 
    
    
     FIELD OF THE INVENTION 
     The present invention relates to accessory modules for vehicles and, more particularly, to an accessory module that is mountable or positionable at an interior surface of a windshield of a vehicle. 
     BACKGROUND OF THE INVENTION 
     It is known in the art to attach an accessory module to an interior surface of a windshield of a vehicle. Often, such modules include a camera that has a forward facing field of view through the windshield. The camera typically has a lens attached thereto, and is mounted to a mounting plate of the module so that the camera has the desired field of view when the module is attached to the windshield. While such accessory modules provide the desired results, they often include multiple components that are often difficult to arrange so that the desired field of view is provided by the camera when the accessory module is attached to the window. Also, the camera and lens are often provided together as a unit, which may be difficult for an electronics supplier, who often prefers to provide the camera or imaging sensor on a printed circuit board. 
     SUMMARY OF THE INVENTION 
     The present invention provides an accessory module or windshield electronics module that houses an accessory, such as an imaging sensor or imaging device, such as an imaging array chip, such as a CMOS or CCD imaging sensor or the like. The accessory module is attachable to a mounting element attached or adhered or otherwise secured to the interior surface of a windshield of a vehicle. The accessory module includes a holding portion that receives or holds the imaging sensor and a lens and circuitry, such as a printed circuit board or the like, and that includes an electrical connector that electrically connects to the circuitry when the circuitry is received by the module. The holding portion is integrally or unitarily molded of a polymeric or plastic material so that the lens, imaging sensor and circuitry may be readily attached to the holding portion at the desired location and/or orientation. 
     According to an aspect of the present invention, an accessory module for a vehicle includes a mounting element securable to an interior surface of a windshield of a vehicle, and an accessory support having a base portion attachable to the mounting element. The accessory support includes an accessory holding element configured to hold an accessory, at least one circuitry holding element configured to hold a printed circuit board at the accessory support, and an electrical connector for electrically connecting the printed circuit board and the accessory to an electrical source or power source or control of the vehicle. The base portion, the accessory holding element and the circuitry holding element are integrally molded together so that the accessory support comprises a unitarily molded accessory support. The accessory module includes a cover portion attachable to the accessory support to substantially encompass the accessory and the printed circuit board within the accessory module. 
     The electrical connector may comprise a plurality of conducting members insert molded within a connecting portion of the accessory support. The connecting portion may be unitarily or integrally molded with the base portion, the accessory holding element and the circuitry holding element. The conducting members may be configured to engage the printed circuit board as the printed circuit board is mounted at the circuitry holding element. 
     The printed circuit board may include an imaging sensor positioned thereon, and the accessory holding element may include a recessed portion for receiving the imaging sensor when the printed circuit board is mounted at the circuitry holding element. The accessory holding element may also include a lens mounting portion configured to mount a lens. The lens mounting portion and the imaging sensor receiving portion or recessed portion may be arranged so that the imaging sensor received in the imaging sensor receiving portion is generally perpendicular to a longitudinal axis of a lens mounted at the lens mounting portion. The lens mounting portion may be arranged at an angle relative to the base portion so that the lens is directed at a desired angle when the accessory module is attached to a windshield of a vehicle. 
     Therefore, the present invention provides an accessory module that has a unitarily molded or formed accessory support. The accessory support may support an imaging sensor or device and a lens, and may support other accessories as well. The unitarily molded accessory support readily receives the accessory and circuitry to ease assembly of the accessory module. The assembled accessory support, with the accessory or accessories and associated circuitry mounted thereon, may be readily attached to a mounting element or button at the windshield of the vehicle. When so attached, the imaging sensor and lens are oriented at the desired angle to provide the desired or appropriate field of view through the windshield of the vehicle. Because the accessory support of the accessory module is unitarily formed, there are fewer components, which eases the assembly of the accessory module and deproliferates parts in the assembly plant. Different accessory supports having different lens mounting angles may be provided to accommodate different windshield angles, depending on the particular application of the accessory module. 
     These and other objects, advantages, purposes and features of the present invention will become apparent upon review of the following specification in conjunction with the drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of an accessory module in accordance with the present invention, as viewed through a windshield when mounted at a windshield of a vehicle; 
         FIG. 2  is a perspective view of the accessory module of  FIG. 1 , as viewed through the windshield; 
         FIG. 3  is a perspective view of the accessory module of  FIGS. 1 and 2 , as viewed through the windshield and along the imaging device; 
         FIG. 4  is a side elevation of the accessory module of  FIGS. 1-3 ; 
         FIG. 5  is another perspective view of the accessory module of  FIGS. 1-4 ; 
         FIG. 6  is a perspective view of an accessory support or holder and mounting element useful with the accessory module of  FIGS. 1-5 ; 
         FIG. 7  is a side elevation of the accessory support and mounting element of  FIG. 6 ; 
         FIG. 8  is a perspective view of the accessory support and mounting element of  FIGS. 6 and 7 , with a printed circuit board mounted thereon; 
         FIG. 9  is the same perspective view as  FIG. 8 , with the printed circuit board removed to show additional details; 
         FIG. 10  is a sectional view of the accessory support or holder taken along the line X-X in  FIG. 9 , with the mounting element removed from the accessory support; 
         FIG. 11  is a block diagram of a mirror control system in accordance with the present invention; and 
         FIG. 12  is a side elevation of a mirror assembly in accordance with the present invention. 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Referring now to the drawings and the illustrative embodiments depicted therein, an accessory module or windshield electronics module  10  includes an accessory holding portion or carrier member or support portion  12  that is attachable to a mounting element or attachment member or button  14  attached or secured to an interior surface of a windshield of a vehicle ( FIGS. 1-5 ). Accessory module  10  includes a housing or casing or cover portion  16  that may attach to carrier portion  12  to substantially encase or contain an accessory within accessory module  10 . Carrier portion  12  is a unitarily or integrally molded element that receives and/or holds an accessory, such as an imaging sensor  18  ( FIG. 10 ) and a lens  20 , such that the imaging sensor and lens are directed or facing through the windshield of the vehicle and provide the desired field of view forwardly of the vehicle when the accessory module is mounted at the windshield of the vehicle, as discussed below. The accessory module is preferably positioned at or near the interior rearview mirror assembly of the vehicle and preferably is positioned at an area of the windshield that is cleaned or wiped by a windshield wiper of the vehicle when the windshield wipers are activated. 
     Mounting element or attachment member  14  is adhered to or bonded to or otherwise attached or mounted or secured to an interior surface of a windshield of a vehicle. In the illustrated embodiment, mounting element  14  is a generally rectangular or square-shaped ring defining a generally planar or flat surface  14   a , which is positioned against the interior surface of the windshield when mounting element  14  is attached to the windshield. As can be seen in  FIGS. 2 and 3 , mounting element  14  may include a narrowed portion  14   b  along one side and two narrowed portions  14   c  at the opposite corners for receiving attaching portions of the carrier portion  12 , such that the attaching portions are positioned between the mounting element  14  and the windshield, as discussed below. Mounting element  14  may also include another narrowed portion  14   d  along a lower side of the mounting element  14  to provide a channel or drain for moisture to exit the accessory module  10 , in the event any moisture or condensation forms within the accessory module. Optionally, the mounting element may comprise other shapes or features, or may be other types of elements, such as similar to those described in U.S. patent application Ser. No. 10/355,454, filed Jan. 31, 2003, now U.S. Pat. No. 6,824,281, which is hereby incorporated herein by reference, without affecting the scope of the present invention. The mounting element is thus attachable to the windshield and configured to receive the carrier portion  12  of the accessory module. 
     Carrier portion  12  includes a base portion  22  that has a surface or face  22   a  that generally faces the windshield when carrier portion  12  is attached to mounting element  14  at the windshield. As shown in  FIGS. 1-3, 6 and 10 , base portion  22  includes a tab or flange  22   b  that is positionable at the narrowed portion  14   b  of mounting element  14 , while the opposite corners of base portion  22  include flexible tabs or snaps or clasps  22   c , which are received at narrowed portions  14   c  of mounting element  14 , such that carrier portion  12  may be readily attached or snapped to mounting element  14  when mounting element  14  is attached to the windshield. The flexible tabs  22   c  also facilitate detachment of carrier portion  12  from the windshield mounting element  14  in case maintenance or replacement of the accessory and/or circuitry is needed. Base portion  22  may also include one or more guides or flanges  22   d  ( FIGS. 6, 8 and 9 ) that may overlap the lower side and/or lateral sides of the mounting element  14  when positioned at the mounting element  14  to assist in retaining the carrier portion  12  at the mounting element  14 . Base portion  22  may also include one or more flexible snaps or clasps  22   e  extending therefrom (as best shown in  FIG. 6 ) for snapping or securing casing or cover portion  16  to carrier portion  12 , as discussed below. 
     Carrier portion  12  includes an accessory mounting or holding portion  24  that protrudes upward from carrier portion  12  (as shown in  FIG. 6 ) for mounting the accessory or accessories of the accessory module. Accessory mounting portion  24  includes a lens receiving or lens mounting portion  26  for receiving lens  20 . Lens mounting portion  26  may be threaded so that the lens  20  may be threaded onto lens mounting portion  26  a desired amount. Optionally, the lens may be otherwise mounted or attached to the lens mounting portion, such as via a snap retention or a retaining ring or the like, without affecting the scope of the present invention. Lens mounting portion  26  may be positioned within a recess  28  defined by accessory mounting portion  24  so that lens  20  is positioned within the recess and generally at the windshield and directed through the windshield when carrier portion  12  is attached to mounting element  14  at the windshield. The lens mounting portion  26  may be angled relative to the angle of the base portion  22  of carrier portion  12  to provide the desired angle of the lens  20  relative to the windshield of the vehicle. The angle may be selected to position the lens generally horizontally when the accessory module is attached to the windshield and may vary depending on the angle of the windshield for the particular application of the accessory module. 
     As shown in  FIG. 10 , accessory mounting portion  24  may define a sensor receiving portion or recess  30 , such as at the rearward end of the lens receiving portion  26 . The sensor receiving portion  30  is configured to receive imaging sensor  18  therein so that imaging sensor  18  is positioned generally parallel to the plane of the lens  20  (or, in other words, so that the imaging sensor is positioned generally perpendicular to a longitudinal axis of the lens held by the lens receiving portion). Preferably, accessory mounting portion  24  defines or provides a generally flat or planar mounting surface  24   a  that is spaced from and that may be generally parallel to the sensor receiving portion  30 . The imaging sensor  18  thus may be provided on a printed circuit board  32  ( FIGS. 7 and 8 ), which may be readily positioned at the appropriate location on carrier portion  12  with the imaging sensor  18  positioned within sensor receiving portion  30 , where the mounting surface  24   a , the recess  30  and the connector  34  (discussed below) function to hold the circuitry or circuit board at the accessory support or carrier portion  12 . 
     The imaging sensor may comprise an imaging array sensor, such as a CMOS sensor or a CCD sensor or the like, such as described in U.S. Pat. Nos. 5,550,677; 5,670,935; 5,796,094; 6,498,620; 5,877,897; 6,396,397 and 6,313,454, and U.S. patent application Ser. No. 10/421,281, filed Apr. 23, 2003, now U.S. Pat. No. 7,004,606, which are hereby incorporated herein by reference. The imaging sensor may comprise a video chip that is mounted on the printed circuit board so that the imaging sensor and circuit board may be provided as a unit from an electronics supplier. The lens may comprise any suitable lens for focusing an image of the exterior scene onto the imaging plane of the imaging sensor. For example, the lens may comprise a lens of the types disclosed in U.S. Pat. Nos. 6,757,109; 6,717,610; 6,590,719 and 6,201,642, which are hereby incorporated herein by reference. Imaging sensor  18  and lens  20  may be implemented with or incorporated in a forward viewing imaging system, such as an imaging system utilizing the principles disclosed in U.S. Pat. Nos. 5,550,677; 5,670,935; 5,760,962; 5,786,772; 5,798,575; 5,796,094; 5,914,815; 5,929,786; 5,949,331; 5,959,367; 6,175,164; 6,198,409; 6,201,642; 6,222,447; 6,396,397; 6,498,620; 6,717,610 and/or 6,757,109, and/or in U.S. patent application Ser. No. 10/422,512, filed Apr. 24, 2003, now U.S. Pat. No. 7,123,168; and/or Ser. No. 10/418,486, filed Apr. 18, 2003, now U.S. Pat. No. 7,005,974, which are all hereby incorporated herein by reference in their entireties. Optionally, the imaging system may function as an automatic headlamp control, such as a headlamp control of the types described in U.S. Pat. Nos. 5,796,094; 5,715,093; 6,742,904; 6,653,615; 6,587,573; 6,831,268 and/or 6,924,470, which are hereby incorporated herein by reference. Optionally, the imaging system may also or otherwise function a lane departure warning system, an object detection system, a traffic lane control system, a lane change assist system, a blind spot detection system or an adaptive cruise control system or the like, such as the types described in U.S. Pat. Nos. 5,929,786 and/or 5,786,772; and/or U.S. patent application Ser. No. 10/427,051, filed Apr. 30, 2003, now U.S. Pat. No. 7,038,577; and/or Ser. No. 10/209,173, filed Jul. 31, 2002, now U.S. Pat. No. 6,882,287; and/or U.S. provisional application, Ser. No. 60/638,687, filed Dec. 23, 2004, which are hereby incorporated herein by reference. Optionally, the imaging system may also or otherwise function as a precipitation sensor or rain sensor, such as the types disclosed in commonly assigned U.S. Pat. Nos. 6,353,392; 6,313,454 and/or 6,320,176, which are hereby incorporated herein by reference. The imaging sensor may be optically coupled with or may contact the interior surface of the windshield, or the imaging sensor may be a non-contacting sensor and thus spaced from the interior surface of the windshield, without affecting the scope of the present invention. Optionally, the imaging system may also or otherwise function as a traffic sign recognition system (such as the types described in U.S. provisional application, Ser. No. 60/562,480, filed Apr. 15, 2004 and U.S. patent application Ser. No. 11/105,757, filed Apr. 14, 2005, now U.S. Pat. No. 7,526,103, which are hereby incorporated herein by reference), or a system for determining a distance to a leading vehicle or object, such as by utilizing the principles disclosed in U.S. Pat. No. 6,396,397, which is hereby incorporated herein by reference, or a collision avoidance system, such as the types disclosed in U.S. Pat. No. 6,411,204, which is hereby incorporated herein by reference, or other vehicle vision or imaging system and/or the like. 
     Carrier portion  12  also includes a connector  34 , such as a multi-pin connector or plug or socket, for electrically connecting the accessory module  10  to an electrical wire or cable or lead (not shown) of the vehicle or of the interior rearview mirror assembly of the vehicle or of another accessory module or console or the like of the vehicle. The socket portion of connector  34  is integrally or unitarily molded with carrier portion  12  and may extend outward from the accessory module  10  when the accessory module is assembled and positioned at the windshield (as shown in  FIGS. 1-5 ). 
     As can be seen with reference to  FIGS. 6-10 , carrier portion  12  may include electrically conducting terminals or pins or elements  36 , which may be insert molded at and partially in and through connector  34 . The ends  36   a  ( FIGS. 4 and 7 ) of elements  36  may be positioned within the socket portion of connector  34  so as to be readily connected to the external wire or cable or lead, while the opposite ends  36   b  of elements  36  may extend from connector  34  and may be positioned to engage or insert through circuit board  32  (as shown in  FIGS. 7 and 8 ) when circuit board  32  is positioned at mounting surface  24   a  of accessory mounting portion  24 . As can be seen in  FIG. 7 , the connector  34  may also define a generally planar mounting surface  34   a  against which the circuit board  32  may be positioned to properly orient the circuit board  32  at the desired or appropriate angle or position. The carrier portion  12  thus provides a unitary molded portion that provides for mounting and positioning of the lens and imaging sensor, and that provides for electrical connection of the circuitry and accessory and/or sensor to an external wire or cable or the like. 
     Optionally, carrier portion  12  may also receive or mount a second circuit board  38 , which may include additional accessories or circuitry. As shown in  FIGS. 6-10 , carrier portion  12  may include a pair of stanchions or pillars or mounting posts  40  extending upward from the base portion  22 , while accessory mounting portion  24  may include a receiving tab  24   b . Receiving tab  24   b  may receive an edge or perimeter portion or region of the circuit board  38 , while the mounting posts  40  may receive an opposite edge or perimeter portion or region of circuit board  38  to retain the circuit board at the carrier portion  12 . Mounting posts  40  may include flexible tabs or snaps or clasps  40   a  to allow for insertion of the circuit board in place at the carrier portion. As can be seen in  FIGS. 6, 8 and 10 , the connector  34  may include a flange or lip  34   b  that is oriented to receive another corner or perimeter portion or region of the circuit board  38  when the circuit board is attached to the carrier portion  12 . The connector  34  may include additional pins or elements for engaging or inserting through the circuit board  38  when circuit board  38  is mounted to carrier portion  12 , or the circuit board  38  may be electrically connected to the circuit board  32  (such as via a ribbon cable or the like), to electrically connect the circuit board  38  and associate circuitry and accessories to the external wire or cable or the like that is plugged into or otherwise connected to connector  34 . 
     When accessory module  10  is mounted at the windshield, the face  22   a  of base portion  22  is generally at or opposed to the windshield. The face  22   a  preferably includes a seal or gasket  42  ( FIGS. 1-3 ) around the recess  28  to substantially seal the face  22   a  against the windshield around the recess  28  and, thus, around the lens  20  attached to the lens mounting portion  26 . Optionally, accessory mounting portion  24  of carrier portion  12  may include an opening or aperture  44  therethrough generally at the lens area and recess  28 . The opening  44  may allow moisture to leave the lens area and enter into the housing area. The carrier portion  12  may include a filter or Gore-Tex patch (not shown) or the like (such as the type described in International Publication No. WO 2004/047421, published on Jun. 3, 2004, which is hereby incorporated herein by reference) at the opening  44  to allow only water vapor to pass into the housing area. The opening  44  thus allows moisture to escape the lens area to avoid moisture that may enter the lens area or recess from condensing at the lens. 
     The housing portion  16  may be configured to readily attach to or snap onto the carrier portion  12 . For example, and as shown in  FIGS. 1, 3 and 5 , housing portion  16  may include slots or openings  16   a  for receiving clasps  22   e  of carrier portion  12  to detachably retain housing portion  16  to carrier portion  12 . Housing portion  16  may also include an opening or slot  16   b  ( FIGS. 1, 4 and 5 ) at one side for receiving connector  34  as housing portion  16  is mounted to carrier portion  12 . Carrier portion  12  may include another clasp  22   f  ( FIGS. 7 and 10 ) for engaging an edge portion of slot  16   b  of housing portion  16  to further retain housing portion  16  to carrier portion  12 . 
     The present invention thus provides an accessory module with a unitary accessory holding portion or carrier portion that is configured to receive an accessory, such as an imaging sensor and lens, and associated circuitry, and is configured to electrically connect the circuitry to an external wire or power source or control or the like. The circuit board and imaging sensor may be readily attached to the carrier portion, and the lens may be readily mounted and properly positioned at the carrier portion, whereby the carrier portion, with the accessories and circuitry mounted thereon, may be readily attached to the mounting element at the windshield of the vehicle. The accessory module of the present invention thus may be readily assembled and readily mounted at the vehicle with the desired accessories and circuitry for the particular application of the accessory module. 
     Because the imaging sensor and circuit board may be provided as a unit and readily attached to the carrier or holding portion of the accessory module, the circuit board manufacturer and/or supplier need not provide the lens as well. The lens then may be provided by a lens manufacturer or supplier, whereby the lens and circuit board/imaging sensor may be received by the accessory module manufacturer or by the vehicle assembler and assembled together. For example, the carrier portion of the accessory module may be provided at a vehicle assembly plant and different imaging arrays or sensors and/or other accessories or circuit board assemblies may be attached or mounted to the carrier portions depending on the particular application or desired content of the accessory module (such as what types of accessories are provided within or associated with the accessory module). The appropriate lens may be readily attached to the lens mounting portion, whereby the imaging sensor or chip is readily positioned at the appropriate location and orientation relative to the lens, without requiring adjustment of the chip location. Optionally, the lens may be adjusted (such as via threaded adjustment or the like) to adjust the focus of the lens relative to the imaging sensor, without affecting the scope of the present invention. The carrier portion may be provided for a particular vehicle or vehicle line or windshield angle, so that the lens is properly aligned or oriented with respect to the windshield and vehicle when the accessory module is mounted at the vehicle, in order to define the desired or appropriate viewing direction or field of view of the lens and imaging sensor. The accessory module thus may be provided as a family of modules, with different carrier portions with different angles between the lens mounting portion and the base portion being provided for different vehicles and/or windshield angles, while the same circuit boards and imaging sensors may be provided across different vehicle lines, depending on the desired content and particular application of the accessory module. 
     Optionally, the accessory module may include other accessories, such as one or more electrical or electronic devices or accessories, such as antennas, including global positioning system (GPS) or cellular phone antennas, such as the type disclosed in U.S. Pat. No. 5,971,552, a communication module, such as the type disclosed in U.S. Pat. No. 5,798,688, a voice recorder, a digital network, such as the type described in U.S. Pat. No. 5,798,575, transmitters and/or receivers, such as a garage door opener or the like, such as the types described in U.S. patent application Ser. No. 10/770,736, filed Feb. 3, 2004, now U.S. Pat. No. 7,023,322, and/or U.S. Pat. Nos. 6,396,408; 6,362,771 and 5,798,688 (and the accessory module may provide a storage compartment, such as for storing a hand held garage door opening device or transmitting device or the like), a digital network, such as the type described in U.S. Pat. No. 5,798,575, a memory mirror system, such as the type disclosed in U.S. Pat. No. 5,796,176, a hands-free phone attachment, a video device for internal cabin surveillance and/or video telephone function, such as the types disclosed in U.S. Pat. Nos. 5,760,962 and/or 5,877,897, a remote keyless entry receiver, a video mirror system, such as the types disclosed in commonly assigned U.S. Pat. Nos. 6,690,268; 6,428,172 and 6,420,975, and U.S. patent application Ser. No. 09/585,379, filed Jun. 1, 2000; and Ser. No. 10/307,929, filed Dec. 2, 2002, now U.S. Pat. No. 6,902,284, lights, such as map reading lights or one or more other lights or illumination sources, such as the types disclosed in U.S. Pat. Nos. 5,938,321; 5,813,745; 5,820,245; 5,673,994; 5,649,756; 5,178,448; 5,671,996; 4,646,210; 4,733,336; 4,807,096; 6,690,268; 6,042,253 and/or 5,669,698, and/or U.S. patent application Ser. No. 10/054,633, filed Jan. 22, 2002, now U.S. Pat. No. 7,195,381, microphones, such as the types disclosed in U.S. Pat. Nos. 6,243,003; 6,278,377 and/or 6,420,975, and/or PCT Application No. PCT/US03/30877, filed Oct. 1, 2003, published Apr. 15, 2004 as International Publication No. WO 2004/032568, speakers, a compass or compass system (which may include the compass sensing circuitry), such as the types disclosed in U.S. Pat. Nos. 5,924,212; 4,862,594; 4,937,945; 5,131,154; 5,255,442 and/or 5,632,092, and/or U.S. patent application Ser. No. 10/456,599, filed Jun. 6, 2003, now U.S. Pat. No. 7,004,593, a navigation system, such as the types described in U.S. Pat. Nos. 6,678,614 and 6,477,464, and U.S. patent applications, Ser. No. 10/456,599, filed Jun. 6, 2003, now U.S. Pat. No. 7,004,593; Ser. No. 10/645,762, filed Aug. 20, 2003, now U.S. Pat. No. 7,167,796; and Ser. No. 10/422,378, filed Apr. 24, 2003, now U.S. Pat. No. 6,946,978, a tire pressure monitoring system, such as the types disclosed in U.S. Pat. Nos. 6,294,989; 6,445,287 and/or 6,472,979, a seat occupancy detector, a trip computer, a remote starter control, a yaw sensor, a clock, a carbon monoxide detector, status displays, such as displays that display a status of a door of the vehicle, a transmission selection (4 wd/2 wd or traction control (TCS) or the like), an antilock braking system, a road condition (that may warn the driver of icy road conditions), a telematics system, such as an ONSTAR® system or the like, and/or any other desired accessory or system or the like (with all of the above-referenced patents and patent applications and PCT applications being commonly assigned, and with the disclosures of all of the above referenced patents and patent applications and PCT applications being hereby incorporated herein by reference in their entireties. 
     The accessory or accessories may be positioned at or within the housing and may be included on or integrated in the printed circuit board or boards. The housing and accessory module may include user inputs or buttons or switches that are accessible by a driver or occupant of the vehicle to control one or more of the accessories of the accessory module and/or of the vehicle. The user actuatable inputs may comprise buttons or switches or touch sensors or proximity sensors or the like. The connection or link between the controls and the other systems and accessories of the accessory module and/or of the vehicle may be provided via vehicle electronic or communication systems and the like, and may be connected via various protocols or nodes or wired or wireless communication systems, such as BLUETOOTH®, SCP, UBP, J1850, CAN J2284, Fire Wire 1394, MOST, LIN and/or the like, or other vehicle-based or in-vehicle communication links or systems (such as WIFI and/or IRDA) and/or the like, depending on the particular application of the accessory module or system and the vehicle. Optionally, the connections or links may be provided via wireless connectivity or links, without affecting the scope of the present invention. 
     Optionally, the accessory module may include a display element, such as a video display element or the like, that may be viewable by a driver or occupant of the vehicle, such as to view vehicle information or captured images, such as images captured by an imaging system of the vehicle. For example, the display element may slide out or flip up or down from the housing portion to provide a video screen that is viewable by the driver of the vehicle, such as a video display screen of the type described in PCT Application No. PCT/US03/40611, filed Dec. 19, 2003, published Jul. 15, 2004 as International Publication No. WO 2004/058540, which is hereby incorporated herein by reference. The video display screen may be operable to display information to the driver of the vehicle, and may be incorporated into or may be in communication with a vision system or imaging system of the vehicle, such as a rearwardly directed vehicle vision system utilizing principles disclosed in U.S. Pat. Nos. 5,550,677; 5,760,962; 5,670,935; 6,201,642; 6,717,610 and/or 6,757,109, which are hereby incorporated herein by reference, a trailer hitching aid or tow check system, such as the type disclosed in U.S. patent application, Ser. No. 10/418,486, filed Apr. 18, 2003, now U.S. Pat. No. 7,005,974, which is hereby incorporated herein by reference, a cabin viewing device or system, such as a baby viewing or rear seat viewing camera or device or system or the like, such as disclosed in U.S. Pat. Nos. 5,877,897 and 6,690,268, which are hereby incorporated herein by reference, a video communication device or system, such as disclosed in U.S. Pat. No. 6,690,268, which is hereby incorporated herein by reference, and/or the like. Optionally, the video display screen may also or otherwise serve as a screen for a navigation system of the vehicle or the like, such as a GPS-based navigation system, such as is known in the automotive art. 
     Optionally, the accessory module may include or may be associated with a telematics system of the vehicle, such as an ONSTAR® system as found in General Motors vehicles or the like, and/or such as described in U.S. Pat. Nos. 4,862,594; 4,937,945; 5,131,154; 5,255,442; 5,632,092; 5,798,688; 5,971,552; 5,924,212; 6,243,003; 6,278,377; 6,420,975; 6,477,464 and/or 6,678,614, and/or U.S. patent application Ser. No. 10/456,599, filed Jun. 6, 2003, now U.S. Pat. No. 7,004,593; Ser. No. 10/645,762, filed Aug. 20, 2003, now U.S. Pat. No. 7,167,796; and Ser. No. 10/422,378, filed Apr. 24, 2003, now U.S. Pat. No. 6,946,978; and/or PCT Application No. PCT/US03/40611, filed Dec. 19, 2003, and/or PCT Application No. PCT/US03/30877, filed Oct. 1, 2003, published Apr. 15, 2004 as International Publication No. WO 2004/032568, which are all hereby incorporated herein by reference. 
     Optionally, the accessory module may be positioned at or near an interior rearview mirror assembly of the vehicle, and/or one or more of the accessories or circuitry of the accessory module may be associated with one or more accessories or controls of the interior rearview mirror assembly. For example, the accessory module may be positioned at or near a prismatic mirror assembly, such as a prismatic mirror assembly utilizing aspects described in U.S. Pat. Nos. 6,318,870; 5,327,288; 4,948,242; 4,826,289; 4,436,371 and 4,435,042, and PCT Application No. PCT/US2004/015424, filed May 18, 2004, published Dec. 2, 2004 as International Publication No. WO 2004/103772, which are hereby incorporated herein by reference. Optionally, the prismatic reflective element may comprise a conventional prismatic reflective element or prism or may comprise a prismatic reflective element of the types described in PCT Application No. PCT/US03/29776, filed Sep. 19, 2003, published Apr. 1, 2004 as International Publication No. WO 2004/026633; U.S. patent application Ser. No. 10/709,434, filed May 5, 2004, now U.S. Pat. No. 7,420,756, and Ser. No. 10/993,302, filed Nov. 19, 2004, now U.S. Pat. No. 7,338,177; and U.S. provisional application, Ser. No. 60/525,952, filed Nov. 26, 2003, which are all hereby incorporated herein by reference, without affecting the scope of the present invention. 
     Alternately, for example, the interior rearview mirror assembly may comprise an electro-optic or electrochromic mirror assembly, which may utilize some of the principles described in commonly assigned U.S. Pat. Nos. 6,690,268; 5,140,455; 5,151,816; 6,178,034; 6,154,306; 6,002,544; 5,567,360; 5,525,264; 5,610,756; 5,406,414; 5,253,109; 5,076,673; 5,073,012; 5,117,346; 5,724,187; 5,668,663; 5,910,854; 5,142,407 and/or 4,712,879, which are hereby incorporated herein by reference, and/or as described in the following publications: N. R. Lynam, “Electrochromic Automotive Day/Night Mirrors”, SAE Technical Paper Series 870636 (1987); N. R. Lynam, “Smart Windows for Automobiles”, SAE Technical Paper Series 900419 (1990); N. R. Lynam and A. Agrawal, “Automotive Applications of Chromogenic Materials”,  Large Area Chromogenics: Materials and Devices for Transmittance Control , C. M. Lampert and C. G. Granquist, EDS., Optical Engineering Press, Wash. (1990), which are hereby incorporated by reference herein; and/or as described in U.S. patent application, Ser. No. 10/054,633, filed Jan. 22, 2002, now U.S. Pat. No. 7,195,381, which is hereby incorporated herein by reference. The mirror assembly may include one or more displays, such as the types disclosed in U.S. Pat. Nos. 5,530,240 and/or 6,329,925, which are hereby incorporated herein by reference, and/or display-on-demand transflective type displays, such as the types disclosed in U.S. Pat. Nos. 6,690,268; 5,668,663 and/or 5,724,187, and/or in U.S. patent application Ser. No. 10/054,633, filed Jan. 22, 2002, now U.S. Pat. No. 7,195,381; PCT Application No. PCT/US03/29776, filed Sep. 9, 2003; and/or PCT Application No. PCT/US03/40611, filed Dec. 19, 2003, which are all hereby incorporated herein by reference. 
     The interior rearview mirror assembly may be mounted at the accessory module, such as via a button-on-button mounting arrangement or the like, or the accessory module may constitute a base or mounting portion of the mirror assembly, or the accessory module and mirror assembly may be otherwise attached to or connected to or associated with one another, without affecting the scope of the present invention. 
     Optionally, the accessory module and/or mirror assembly may include a control system for controlling the dimming of the electro-optic mirror reflective element or cell, such as for controlling an electrochromic mirror reflective element or cell, such as a control system of the types described in U.S. Pat. Nos. 6,406,152; 6,305,807; 6,291,905; 6,089,721; 6,056,410 and/or 6,210,008, which are hereby incorporated herein by reference. The control system may be included or incorporated in the mirror casing of the mirror assembly (or in any other part of the mirror assembly, such as a mounting portion or a pod portion or the like), and may include or, and preferably, may be substantially established on an application specific integrated chip (ASIC), such as an ASIC positioned at or to the rear of the mirror reflective element of the interior mirror assembly. The EC driver circuit is operable to control the electro-optic or electrochromic (EC) mirror reflective element or cell (by adjusting or controlling the voltage applied to the powering electrode at the conductive coatings of the mirror reflective element or cell) in response to an ignition voltage and a current gating element or transistor. For example, and as shown in  FIG. 11 , an interior electro-optic mirror control system  110  for controlling an interior electro-optic or electrochromic mirror reflective element or cell  112  includes control circuitry or a microprocessor or the like on a circuit board or controller  114  (such as an EC-driver-circuit-on-a-chip, such as established at or on an ASIC or “chip”) and a current gating element  116 . 
     The control system  110  and mirror reflective element is preferably powered by an ignition voltage  118  of the vehicle (or other power source), which preferably is directly connected via a resistor  122  to a powering electrode of the EC cell to power the EC cell  112  (with the other side or electrode of the EC cell being grounded or connected to ground). A voltage sensing line  120  is connected between the powering electrode of the EC cell  112  and the ASIC controller  114 , whereby the ASIC controller can determine/measure the voltage being applied at any moment in time to the EC cell. The ASIC controller thus can sense or monitor the voltage and control the voltage applied across the EC cell (via control of the current flow through current gating element  116 ) so that it does not exceed its tolerable design intent (typically between 0 to 1.4 volts DC or thereabouts). Current flowing through current gating element  116  is controlled by ASIC controller  114  via control line  124 . As illustrated, the current gating element  116  and the EC cell  112  are grounded or connected to or in conductive communication with ground. Note that this is a preferred embodiment, but other embodiments are contemplated utilizing further electronic or electrical circuitry or components. 
     When the ASIC controller  114  detects that the voltage (as sensed by sense line  120 ) being applied across the EC cell is higher than what is desired or can be tolerated by the electrochromic medium utilized in the EC cell, then ASIC controller  114  opens up current flow through current gating element  116  to maintain the desired applied tolerable voltage across the EC cell. Further, should it be desired to further reduce an applied voltage across the EC cell, then ASIC controller  114  may further open up or increase current flow through the current gating element  116  so that voltage across the EC cell is reduced. Thus, in order to bleach the cell (i.e. to apply zero or close to zero volts across the EC cell), the control line  124  essentially reduces the resistive path through the current gating element  116  close to or at about zero ohms. The ASIC controller thus detects the instantaneous voltage (as dropped from the vehicle ignition through resistor  122  and supplied to the powering electrode of the EC cell), and may adjust or control or open the gating element  116  to shunt a desired or appropriate amount of current through the gating element to ground, such that a reduced or desired or appropriate voltage is applied to the EC cell to maintain the voltage at the EC cell within the tolerable range and/or to achieve the desired degree of dimming of the electro-optic mirror reflective element or cell. Thus, the ASIC controller responds to detected glaring and ambient light levels about the vehicle to increase or decrease the resistance path through gating element  116  to increase or decrease the voltage across the EC cell, as needed or appropriate for the particular glaring or ambient lighting conditions encountered while driving at night, while always ensuring that the EC cell is not damaged or endangered by an over-voltage such as might occur should an ignition voltage or close to an ignition voltage be applied for more than a momentary period across the EC medium. 
     As illustrated, the ASIC controller includes photosensors  126   a ,  126   b , such as photodiodes or phototransistors or the like, for sensing glare and ambient light at the mirror assembly. Optionally, one or more of the photosensors may be in communication with a light pipe for piping or conduiting ambient light or glare light from external to the mirror assembly to the photosensor or photosensors within the casing and at the ASIC controller. For example, the light pipe or pipes may utilize aspects of the light-piping described in U.S. patent application Ser. No. 10/229,573, filed Aug. 28, 2002 and published Mar. 6, 2003 as Publication No. U.S. 2003/0043589, now U.S. Pat. No. 7,008,090, which is hereby incorporated herein by reference. Optionally, the light pipe connected to or in communication with the ambient light sensing photosensor may be routed generally downwardly from the photosensor to receive ambient light from a lower portion view port of the mirror casing of the mirror assembly (or could be routed upward to an upper portion view port of the mirror casing). The circuitry or ASIC controller thus may determine the glare and ambient light present at the mirror assembly in response to the outputs of the photosensors and may adjust or control the current gating element so that the appropriate degree of dimming is achieved at the mirror reflective element or cell. 
     For example, when the ignition is initially activated and the current gating element is closed, the initial voltage (e.g. about 12 volts) is applied to the EC cell and detected by the ASIC controller via the sense line. The ASIC controller will then control the current gating element to shunt the appropriate amount of voltage/current through the current gating element to reduce the voltage at the mirror cell to a desired and tolerable voltage level (such as a voltage typically between zero volts and about 1.4 volts or thereabouts). If the ASIC controller detects or determines (such as in response to the outputs of the ambient light and glare photosensors) that the cell should be dimmed a greater or reduced amount (such as via a detection of reduced glare and/or increased ambient light), the ASIC controller adjusts or controls or opens/closes the current gating element (via the control line) to shunt a desired or appropriate amount of the current/voltage to ground so that an increased/reduced amount of current/voltage is applied to the mirror reflective element or cell, thereby dimming the cell an increased/reduced/desired amount. 
     The circuitry or circuit board or ASIC controller  114  may include various processing elements established on a chip, such as a microprocessor, memory, an A/D converter, a D/A converter, a LIN/CAN BUS, an EC cell voltage sensing/control, a dawn/dusk shutdown circuitry, timers, drivers, and/or the like. Optionally, the ASIC controller may include compass sensors and/or circuitry and/or the like, such as in a similar manner as a “compass-on-a-chip”, such as described in U.S. patent application Ser. No. 11/021,065, filed Dec. 23, 2004, now U.S. Pat. No. 7,255,451, which is hereby incorporated herein by reference. The ASIC controller may be positioned within the mirror casing, such as at and behind the mirror reflective element or cell. The current gating element or transistor  116  may be internal to or incorporated in the ASIC controller, or may be external to the ASIC controller, without affecting the scope of the present invention. Optionally, the control system or ASIC controller may have one, two or three current gating elements or transistors or the like (such as for control channels for only one mirror reflective element or for two or three mirror reflective elements, such as for an interior mirror reflective element and two outside or exterior mirror reflective elements), with any one or all of which may be internal or external to the ASIC controller, without affecting the scope of the present invention. 
     Control circuitry, and software and hardware to so do, are known in the art. For example, the likes of a UD13 Super Smart Power Mirror Motor Driver available from SGS-Thomson Microelectronics can be used. Such ASICs typically include a microprocessor, such as an eight bit or sixteen bit MCU, UART, memory, such as 8K ROM or more, memory, such as 256 bytes RAM, ADC, WPG, timers, A/D converters, D/A converters, display drivers, thermistors, LIN or CAN communication I/Os, other I/Os, high-side drivers and half-bridge drivers, all established on a silicon or similar semiconductor substrate. In the present invention, such can be adapted to form the EC-driver-on-a-chip by co-establishing on the semiconductor substrate two photosensitive areas, such as by forming photodiodes or phototransistors on the substrate. In addition to the light piping described above, lensing and/or infrared light filtering may be provided at the chip level in such an EC-driver-on-a-chip. 
     The ignition voltage  118  may be unregulated and may provide an output of about 9 volts to about 16 volts typical, and about 12.8 volts nominal. The resistor  122  may comprise any type of suitable resistor, and may provide a resistance of about 20 ohms to about 40 ohms or thereabouts, with about two to five watts of power dissipation or greater or lower depending on the particular EC interior mirror construction. For example, the resistor may comprise a copper or PTC trace on a flexible circuit or pad attached to the rear of the mirror reflective element or cell, or may comprise any other suitable resistor element, without affecting the scope of the present invention. Optionally, the interior rearview mirror element itself can function as a heat sink to the likes of a flat ribbon power dropping resistor attached thereto. The EC-driver-on-a-chip could be implemented for an independent exterior rearview mirror, such as by utilizing aspects described in U.S. Pat. No. 5,659,423, which is hereby incorporated herein by reference. Such use of large-scale integration of electronic functionality/circuitry in an EC-driver-on-a-chip can achieve a markedly lower package size at a reduced cost than has hitherto been known for EC driver circuitry, and can allow greater design and construction flexibility for the interior mirror assembly. 
     Optionally, and with reference to  FIG. 12 , an interior rearview mirror assembly  210  may be wirelessly powered and controlled via a remote or wireless communication link or system  212  and a remote or wireless power link or system  214 . Mirror assembly  210  includes a mirror casing or housing  216  and a reflective element  218 . Mirror assembly  210  also includes one or more electrically powered accessories  220 , such as power consuming accessories within the mirror casing  216 , such as at or established on a printed circuit board or ASIC controller or the like within the mirror assembly. Because the mirror accessories are powered and controlled by wireless systems, the mirror assembly may include power consuming accessories without the additional requirement of wires and/or cables extending between the mirror assembly and the headliner of the vehicle. 
     The wireless power link or system  214  includes a remotely located inductive power transmitter  222 , such as positioned in or at the headliner  224  of the vehicle, and an inductive power receiver or transceiver  226 , such as positioned at or in the mirror casing  216  of mirror assembly  210 . Note that the transmitter can be located elsewhere in the vehicle, such as within an instrument panel region, or in a side door/side panel portion when inductively coupling to an exterior mirror assembly or an exterior door handle assembly. The inductive power transmitter  222  comprises a power coil located in the headliner of the vehicle (and connected to a power source of the vehicle, such as via wires or cables), while the inductive power receiver  226  comprises a receiver coil in or at the mirror assembly for receiving the inductive power generated by the power coil. The remote power system thus provides inductive power coupling to the mirror assembly from a location remote from the mirror assembly, without wires or cables connected between the remote location and mirror assembly. The inductive power system of the present invention may utilize aspects of the inductive powered devices described in U.S. Pat. Nos. 6,917,163; 6,825,620; 6,812,645; 6,731,071 and 5,264,997, which are hereby incorporated herein by reference. The frequencies and protocols and means used for operation of the inductive power link or system may be selected to reduce or minimize adverse effects the inductive power coupling may have on the wireless communication system and on the performance of the accessories at or in or near the mirror assembly or elsewhere in the vehicle, and can be chosen to minimize/eliminate any EMI/RFI impact on vehicle electricals. 
     As can be seen in  FIG. 12 , power to electrify/operate any electrical/electronic components or accessories of the mirror assembly (such as for example, a map or a reading lamp or an electrochromic mirror reflective element or a garage door opener or a compass circuit or a camera or a headlamp controller or a heater pad or a motor or the like) is provided by inductive coupling rather than by wired connection. The secondary (receiving) element (typically a coil) of the inductively powered link is preferably placed such as in the mirror housing or elsewhere in the mirror assembly (or in a windshield accessory module), and in proximity (typically a few inches up to about ten inches or so) to and adjacent to but separated from and remote from the primary (transmitting) element (that also typically is a coil) of the inductive coupling system that is connected to the vehicle battery/ignition power supply in order to supply power to the inductively powered mirror or accessory module assembly via a wireless link. The elimination of electrical connectors may enhance the reliability of the system by eliminating the costs and complexities associated with conventional electrical connectors. For example, conventional electrical connectors, even when LIN-BUS enabled, can be large/costly and require the vehicle assembly-line employee to make a plug-socket connection when the vehicle is being assembled. By contrast, all power (often several watts of power; for example, about 0.25 watts to about 20 watts or more depending on whether a heater pad may be being used) required to operate the mirror according to the present invention can be inductively passed from the power source of the vehicle to the inductively powered mirror assembly, and the driver experiences a “surprise and delight” appreciation given that no wiring is visible to the driver. Also, in accordance with the present invention, the vehicle manufacturer can choose to add or delete accessories from a mirror assembly or accessory module assembly without concern about pre-providing enough wires/connector for I/O and for power. 
     The wireless communication link or system  212  includes a data transceiver  228 , such as located at or in the headliner, and a data transceiver  230 , such as at or in the mirror assembly. The wireless communication system thus provides for wireless communication between the data transceiver  228  and the data transceiver  230  to communicate with and/or control the accessories  220  of the mirror assembly. Note that a broadband or multi-channel wireless communication link can be established allowing multiple inputs and outputs to the mirror assembly and control of and data I/O to and from a plurality of controls and devices within and at the interior mirror assembly. The wireless communication link or data channel may comprise various wireless links or protocols, such as an infrared communication link (such as described in U.S. patent application Ser. No. 10/456,599, filed Jun. 6, 2003, now U.S. Pat. No. 7,004,593, which is hereby incorporated herein by reference) or radio frequency communication, or other communication protocol, such as BLUETOOTH® or the like. 
     In the illustrated embodiment, the mirror assembly  210  includes a double ball mounting arrangement  232  (although other mounting arrangements, such as single ball mounting arrangements or the like may be implemented without affecting the scope of the present invention), which pivotally mounts the mirror casing  216  and reflective element  218  to a mounting base or channel mount  234 , which, in turn, is attached to a mounting button or attachment element  236  at the interior surface of the windshield  238  of the vehicle. The mirror assembly and mounting base thus may be mounted to the windshield at a location spaced downward from the headliner of the vehicle, without requiring any wires or cables or wire covers or the like along the windshield and between the mounting base and the headliner. The reflective element of the mirror assembly may comprise an electro-optic reflective element (such as an electrochromic reflective element) or a prismatic reflective element, without affecting the scope of the present invention. 
     Although shown and described as having the power receiver located in or at the mirror assembly, clearly, the power receiver may be located elsewhere, such as within the mirror casing, or at or in or near a pod or module or windshield electronics module (WEM) or at or in an exterior mirror or the like, without affecting the scope of the present invention. The remote or wireless power system thus provides power to the power receiver and to the accessories at or near or connected to or associated with the power receiver to power the accessories, while the wireless communication system provides communication and/or control to and from the accessories at or near or connected to or associated with the power receiver to control or activate/deactivate or monitor the accessories. 
     Because the mirror assembly  210  and accessories therein or thereat is/are powered by a remote power system or source, the mirror system does not require or include a wire harness and connector and wire cover or the like that is typically positioned along the windshield of the vehicle and between the mirror mount and the headliner of the vehicle. Also, because no such wires and wire covers are located along the windshield, the desire or need of a frit layer or the like at the windshield to conceal such wires/wire covers is obviated. 
     Optionally, the interior mirror assemblies and/or accessory modules of the present invention may include a hard disc drive (HDD) electronic mass storage device, and preferably a HDD microdrive, such as a one-inch (or smaller) HDD, such as are developed by Hitachi Global Storage Technologies, Inc. (HGST) of the United States, Hoya Corp. of Japan, and Seagate Technology LLC. 
     Optionally, the accessory module may be at or near or associated with another accessory module or windshield electronics module or console or other types of modules or housings, such as the types described in U.S. patent application Ser. No. 10/355,454, filed Jan. 31, 2003, now U.S. Pat. No. 6,824,281; and Ser. No. 10/456,599, filed Jun. 6, 2003, now U.S. Pat. No. 7,004,593, and/or U.S. Pat. Nos. 6,690,268; 6,250,148; 6,341,523; 6,593,565; 6,229,226 and 6,326,613, and/or PCT Application No. PCT/US03/40611, filed Dec. 19, 2003, which are all hereby incorporated herein by reference. Optionally, the accessory module and/or mirror assembly may utilize aspects of the modules and mirror assemblies described in U.S. provisional applications, Ser. No. 60/692,113, filed Jun. 20, 2005; Ser. No. 60/677,990, filed May 5, 2005; Ser. No. 60/653,787, filed Feb. 17, 2005; Ser. No. 60/642,227, filed Jan. 7, 2005; Ser. No. 60/638,250, filed Dec. 21, 2004; Ser. No. 60/624,091, filed Nov. 1, 2004, and Ser. No. 60/609,642, filed Sep. 14, 2004, which are all hereby incorporated herein by reference in their entireties. 
     Therefore, the present invention provides an accessory module that may include an imaging sensor or device and may include other accessories as well. The accessory module includes a unitarily molded support or carrier portion that readily receives the accessory and circuitry to ease assembly of the accessory module. The assembled carrier portion, with the accessory or accessories and associated circuitry mounted thereon, may be readily attached to a mounting element or button at the windshield of the vehicle. When so attached, the imaging sensor and lens are oriented at the desired angle to provide the desired or appropriate field of view through the windshield of the vehicle. Because the carrier portion of the accessory module is unitarily formed, there are fewer components, which eases the assembly of the accessory module and deproliferates parts in the assembly plant. 
     Changes and modifications to the specifically described embodiments may be carried out without departing from the principles of the present invention, which is intended to be limited only by the scope of the appended claims as interpreted according to the principles of patent law.