Abstract:
A sensing device mounting mechanism, and related method of operating such a mechanism, are disclosed. In at least some embodiments, the mechanism can include a housing that is mountable to a support structure. The housing can define an interior for receiving and supporting a sensing device. The mechanism further includes light pipe device coupled to the housing. The light pipe device can be used to communicate light from a light source to the sensing device, or from the sensing device to a location exterior of the housing such that it can be viewed, detected or received by an operator or other device. Advantageously, the sensing device mounting mechanism is constructed so as to enhance and facilitate, as opposed to interfere with, proper performance of the sensing device.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
   STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT 
   FIELD OF THE INVENTION 
   The present invention relates to sensing devices and, more particularly, relates to various mechanisms, structures and/or methods for mounting sensing devices onto other structures. 
   BACKGROUND OF THE INVENTION 
   Sensing devices of many different types are commonly employed in a variety of environments and applications. Sensing devices encompass a broad spectrum of devices including, for example, various light-sensing devices such as laser-sensing devices, light sensing devices that are capable of distinguishing among different colors of visible light, and devices for sensing various other types of radiation including infrared radiation or heat, microwave radiation, and x-ray radiation. Additionally, other sensing devices include, for example, devices that are capable of sensing the position of other structures, acoustic sensors, vibration sensors, motion sensors such as accelerometers, orientation sensors involving gyroscopes, and numerous other types of sensing devices. 
   Sensing devices are employed in a wide variety of industrial, commercial, military, residential and other environments and applications. For example, in industrial environments, light sensors are often employed in conjunction with conveyor systems/assembly line structures. Such light sensors are often used to detect the presence of objects moving down an assembly line and to determine whether a given object has entered or exited a particular region of the assembly line. Light sensors of similar design can also be used in residential applications, for example, in connection with garage door openers. Also for example, in many commercial facilities as well as residential homes, various sensing devices are used in security systems in order to detect the presence of potential intruders within or nearby those facilities or homes. Sensing devices can further be implemented on vehicles, for example, to detect the presence of objects behind vehicles. Indeed, sensing devices are ubiquitous in today&#39;s modern world. 
   Although in some cases sensing devices are free-standing, typically sensing devices are mounted upon or in relation to other supporting structures. Further, in many if not most circumstances, it is desirable that the sensing devices be mounted in relation to such supporting structures in a fixed manner, or at least in a manner by which the location and orientation of a given sensing device relative to the supporting structure(s) is known or predictable. For example, in the case of a light sensing device implemented in a manufacturing assembly line, it is typically desired that the light sensing device be fixedly orientated in a particular direction so as to be aligned to receive a light beam from a light source located elsewhere. The mounting of light sensing devices in other environments, such as in the case of garage door openers, similarly can entail the careful, fixed positioning of the sensing devices. 
   Notwithstanding the above discussion, in some other circumstances, it is not so critical that the positioning of sensing devices in relation to the structures on which they are mounted be finely adjustable. In some of these circumstances, accurate positioning of the sensing devices simply is not necessary, for example, in the case of the mounting of some vibration sensors or acoustic sensors. Also, in some circumstances, even where accurate positioning of the sensing devices is important, the structures on which the sensing devices are intended to be mounted are designed or manufactured in a manner such that the accurate positioning of the sensing devices can be reliably achieved so long as the sensing devices are mounted upon the other structures in a standardized manner. This can be the case, for example, where the structures on which the sensing devices are to be mounted are designed and manufactured to meet or exceed tolerances that are equal or better than the tolerances that must be met in positioning the sensing devices in order for the sensing devices to function properly. 
   Still another consideration in the mounting of sensing devices with respect to supporting structures is whether the intermediate mechanism or support component existing between the sensing device and the supporting structure inhibits or interferes with any operation of the sensing device. To the extent that any intermediate mounting mechanism might get in the way of a signal (e.g., block a light pathway), such mechanism could interfere with proper performance of a sensing device and for that reason would be undesirable. Stated another way, it would be desirable to provide an intermediate mounting mechanism that does not prevent or limit the sending of an indicator signal. 
   For at least these reasons, therefore, it would be advantageous if improved mounting mechanisms or structures for use in mounting sensing devices to other support structures could be developed. In particular, it would be advantageous if, in at least some embodiments, such improved mounting mechanisms facilitated the accurate positioning of sensing devices with respect to other support structures in a manner that allowed for reliable and accurate positioning. Additionally, in at least some embodiments, it would be desirable if such improved mounting mechanisms facilitated the simple and quick installation of sensing devices without the use of many small parts or cumbersome tools. Further, in at least some embodiments, it would be advantageous if the sensing device mounting mechanism would be constructed so as to enhance and facilitate, as opposed to interfere with, proper performance of a sensing device, including for example, the reception of signals by the device and/or the provision of an output signal by the device. 
   BRIEF SUMMARY OF THE INVENTION 
   The present inventor has recognized that a variety of improved mounting devices or mechanisms for mounting sensing devices to supporting structures could be developed. More particularly, the present inventor has recognized that, in at least some embodiments, the mechanism can include a housing that is mountable to a support structure. The housing can define an interior for receiving and supporting a sensing device. The mechanism further includes a light pipe device coupled to the housing. The light pipe device can be used for communicating a light signal from a location external to the housing to the sensing device, and/or from the sensing device to the location exterior to the housing. For example, in at least some cases, the light pipe can be used to communicate a light signal from a sensing device to an individual or device positioned exterior of the housing. Alternatively, in at least some cases, the light pipe device can be used to communicate a light signal from a light source external to the housing to the sensing device. 
   Additionally, in at least some embodiments, the present invention relates to a mounting device configured for mounting a sensing device in relation to a supporting structure. In at least some embodiments, the mounting device can have a housing that further includes a stem portion and a flange portion extending from the stem portion and wherein mounting device housing can be mounted to the support structure by passing the stem portion through an orifice in the support structure until the flange portion substantially abuts the supporting structure. Additionally, in at least some embodiments, the stem portion can further include a snapping mechanism for securing the mounting assembly to the support structure via snap-fit engagement. Further, in at least some embodiments, the mounting assembly can include a light pipe device coupled to the housing. 
   In some additional embodiments, the present invention relates to the combination of a sensing device with a sensing device mounting mechanism, where the sensing device is located within the interior a housing of the mounting mechanism. In at least some such embodiments, the sensing device includes a light source or other indicator light. Also, in at least some embodiments, the sensing device includes a printed circuit board coupled to a plurality of components including a light emitting diode. 
   Further, in at least some embodiments, the housing of the sensing device mounting mechanism can include a stem portion and a flange portion extending from the stem portion and the stem portion can further include a main portion and a hinged portion that is hingedly coupled to the main portion. Also, in at least some embodiments, the housing can comprise a stem portion having a plurality of interior snapping mechanisms and a flange portion having a plurality of interior snapping mechanisms and the stem portion interior snapping mechanisms and the flange portion interior snapping mechanisms can engage complementary notches formed in the sensing device so as to secure the sensing device within the interior of the housing. And still further, in at least some embodiments, the housing can include a stem portion, a flange portion extending from the stem portion, and an end cap portion, and the end cap portion can include a pair of snapping mechanisms for snap fit engagement with the stem portion. 
   Further, in at least some embodiments, the present invention relates to a method associated with a sensing device mounting mechanism having a housing mountable to a supporting structure, where the housing defines an interior for receiving and supporting a sensing device, and a light pipe device coupled to the housing. The method includes communicating light from at least one of the interior of the housing to an exterior of the housing, and from the exterior of the housing to the interior of the housing, by way of the light pipe device that is coupled to the housing. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is a perspective view of a sensing device mounting mechanism in accordance with at least one embodiment of the present invention, with the mounting mechanism implemented in one exemplary manufacturing application; 
       FIG. 2  is a reverse perspective view of a sensing device mounting mechanism including a light pipe device, similar to that of  FIG. 1 , in accordance with at least one embodiment of the present invention; 
       FIG. 3  is a cross-sectional view of the sensing device mounting mechanism taken along line  3 - 3  of  FIG. 2 ; 
       FIG. 4  is a cross-sectional view, similar to that of  FIG. 3 , showing another sensing device mounting mechanism including a light pipe device in accordance with at least one embodiment of the present invention; 
       FIG. 5  is a cross-sectional view, similar to that of  FIG. 3 , showing another sensing device mounting mechanism including a light pipe device in accordance with at least one embodiment of the present invention; 
       FIG. 6  is a cross-sectional view, similar to that of  FIG. 3 , showing another sensing device mounting mechanism including a light pipe device in accordance with at least one embodiment of the present invention; and 
       FIG. 7  is a cross-sectional view, similar to that of  FIG. 3 , showing another sensing device mounting mechanism including a light pipe device in accordance with at least one embodiment of the present invention. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
   Referring to  FIG. 1 , a sensing device  1  is shown to be implemented in one exemplary application, namely, a conveyor system  2  as is often found in manufacturing and other commercial facilities implemented in assembly lines or the like. The sensing device  1  in the present embodiment is a light sensing device capable of receiving and detecting the presence of a light beam (e.g., a laser beam) emitted by a light source  3  located on the opposite side of the conveyor system  2 . Stated another way, the light sensing device  1  is aligned with a light emitting device  3 . The sensing device  1  in particular is mounted onto a supporting structure  4  of the conveyor system  2  by way of a mounting mechanism  5 . 
   Exemplary applications for the light sensing device arrangement of  FIG. 1  can include, for example, “transmitted beam” or “through beam” applications. However, other applications, including but not limited to “retroreflective” and “diffuse” applications, are known and considered to be within the scope of present invention. In the context of a retroreflective application, for example, the sensing device  1  would both emit and detect light that was reflected off of a target reflector that can be positioned where the light source  3  is located. Similarly, in the context of a diffuse application, the sensing device  1  would both emit and detect light that was reflected off of the object to be sensed (i.e., without the use of a light source positioned where the light source  3  is shown to be located). 
   Although the mounting mechanism  5  (as well as the supporting structure  4  and the sensing device  1 ) can have a variety of different structural forms and shapes depending upon the embodiment,  FIG. 1  shows the mounting mechanism  5  to have a generally mushroom-shaped exterior housing  6  including a substantially cylindrical stem portion  7  and a flange portion or flange  8  extending outward from the stem portion. Housing  6  includes first and second ends,  9  and  10 , respectively. In the embodiment shown, the mounting mechanism  5  is positioned onto the supporting structure  4 , which is a panel (or other substantially flat flange or wall of low to moderate thickness), by inserting the second end  10  of the housing  6  through a complementary orifice within the supporting structure  4  and passing the stem portion  7  through the orifice up until the flange  8  abuts the supporting structure. 
   Although in the present embodiment the mounting mechanism  5  and sensing device  1  are arranged such the mounting mechanism  5  protrudes outward from the supporting structure  4  away from the light source  3 , and such that the sensing device  1  receives signals entering at the first end  9  of the housing, in alternate embodiments the mounting mechanism  5  and sensing device  1  could be arranged in an opposite manner relative to the panel-type supporting structure, e.g., where signals entered at the second end  10  of the housing. Further, while in the present embodiment the flange  8  includes a circular or disc-shaped flange surface  11  for abutting the supporting structure  4 , the flange could also be of a rectangular shape or other arbitrary shape. Additionally, while in the present embodiment, and throughout the figures, the mounting mechanism  5  employs the substantially cylindrical stem portion  7 , in alternate embodiments the mounting mechanism could have an outer surface of arbitrary shape (e.g., the mounting mechanism could have a box-shaped outer surface). Further, although the present embodiment envisions that the mounting mechanism  5  would be fully secured to (e.g., fixed in relation to) the supporting structure, the present invention also encompasses certain embodiments that could allow for some relative (e.g., sliding or rotational) motion between the mounting mechanism  5  and the supporting structure  4 . 
   Although the sensing device  1  of  FIG. 1  is a light sensing device, it should be understood that embodiments of the present invention are intended to be applicable with respect to numerous different types of sensing devices including, for example, other light-sensing devices (e.g., color-sensing devices, etc.), devices for sensing various other types of radiation (e.g., infrared, microwave, x-ray, etc.), position-sensing devices, acoustic sensors, vibration sensors, motion sensors such as accelerometers, orientation sensors involving gyroscopes, and numerous other types of sensing devices. Also, while  FIG. 1  shows the sensing device  1  to be implemented in connection with the conveyor system  2 , it should be understood that embodiments of the present invention are intended to be applicable with respect to the mounting of a variety of different types of sensing devices onto a variety of different supporting structures in a variety of different industrial, commercial, military, residential and other environments and in connection with a variety of different applications. 
     FIG. 2  is a reverse perspective view a sensing device mounting mechanism  12  mounted onto a supporting structure  13 , similar to that of  FIG. 1 , in accordance with at least one embodiment of the present invention. Referring to  FIG. 2 , although the mounting mechanism  12 , as well as the supporting structure  13  and the sensing device (not shown), can have a variety of different structural forms and shapes depending upon the embodiment,  FIG. 2  shows the mounting mechanism  12  again to have a generally mushroom-shaped exterior housing  14  including a substantially cylindrical stem portion  15  and a flange portion  16  (also referred to herein as a “flange”) protruding outward from the stem portion  15  at a first end  31  of the stem portion. The flange portion  16  includes a generally circular disc-shaped surface  18  that extends from the stem portion, and the disc-shaped surface substantially abuts the supporting structure  13  when the mounting mechanism is mounted and ready for use. As with the  FIG. 1  embodiment, the mounting mechanism  12  is positioned onto the supporting structure  13 , which is a panel (or other substantially flat flange or wall of low to moderate thickness), by inserting a second end  19  of the housing  14  through a complementary orifice within the supporting structure  13  and passing the mounting mechanism  12  through the orifice up until the disc-shaped surface  18  substantially abuts the supporting structure. 
   The mounting mechanism  12  can be secured in relation to the supporting structure  13  in A variety of ways. As illustrated, in one embodiment, the housing  14  of the mounting mechanism  12  further includes at least one snapping mechanism (which can take any of a variety of shapes and sizes), generally referred to by numeral  20 , for securing the mounting mechanism to the supporting structure  13  via a snap-fit engagement, with or without an angular offset relative to the supporting structure, as described in more detail in co-pending U.S. patent application Ser. No. 11/240,175, entitled “Sensor Mounting Structure with Snapping Feature” filed on even date herewith, which is hereby incorporated by reference herein. In further embodiments, the mounting mechanism  12  can be attached to the supporting structure  13  in a variety of other ways. For example, the mounting mechanism can include two housing portions that are slidable relative to each other and that each include appendages(s) such that, when the housing portions are appropriately slide relative to one another, the appendages apply opposing forces to opposite sides of the supporting structure so as to grasp or clamp onto that structure. Such embodiments are described in more detail in, for example, co-pending U.S. patent application Ser. No. 11/240,033, entitled “Sensor Mounting Structure with Adjustable Swivel Ball and Panel Mounting Mechanism” filed on even date herewith, which is hereby incorporated by reference herein. 
   While in the present embodiment the mounting mechanism  12  and sensing device (not shown in  FIG. 2 ) are arranged such the mounting mechanism  12  protrudes outward from the supporting structure  13  and the sensing device receives signals entering at the first end  31  of the housing  14 , in alternate embodiments the mounting mechanism  12  and sensing device could be arranged in an opposite manner relative to the panel-type supporting structure (e.g., where signals entered at the second end  19  of the housing). Further, while in the present embodiment the flange  16  includes a flange disc-shaped surface  18  having a circular profile, the flange could also include a rectangular shape or other arbitrary shape. Additionally, while in the present embodiment the mounting mechanism  12  employs a cylindrical stem portion  15 , in alternate embodiments the mounting mechanism could have a housing  14  of arbitrary shape (e.g., the mounting mechanism could have a box-shaped outer surface). Further, although the present embodiment envisions that the mounting mechanism  12  would be fully secured to (e.g., fixed in relation to) the supporting structure  13 , the present invention also encompasses certain embodiments that could allow for some relative (e.g., sliding or rotational) motion between the mounting mechanism  12  and the supporting structure. Additionally, while not illustrated as such, the mounting mechanisms of the present invention can include an angular offset, which is described in the U.S. Patent Application entitled “Sensor Mounting Structure with Snapping Feature” referenced above. 
   Still referring to  FIG. 2 , the mounting mechanism  12  further includes a light pipe device  24  (also referred to herein as a “light pipe”) that is coupled or joined to the housing  14 . In one embodiment, the light pipe is integral with the housing. As used herein, “light pipe” and “light pipe device” refer to a device that can be used to communicate light from one location to another. Such light pipes can include light source(s) that are sending light signals to a given sensing device (e.g., the light source  3  discussed above), as well light source(s) that are included as part of the sensing device (or otherwise supported within the housing  14  or in relation to the sensing device) and are employed to provide output signal(s) representative of various quantities, for example, representative of the levels of signals received by the sensing device or information as to the operational status of the sensing device. 
   In some embodiments, for example, a light pipe could conduct light signals provided by one or more light emitting diodes (LEDs), lasers, light bulbs, fiber optic cables, liquid crystal displays (LCDs) (e.g., alphanumeric displays), and/or other devices to a sensing device or from a sensing device, e.g., where such device(s) were implemented as part of the sensing device and intended to communicate signal(s) to locations exterior of the sensing device. Further, in the case of an LCD display mounted on the sensing device, it is possible that the light pipe would both communicate light from the exterior of the housing to the LCD display, and then further conduct reflected light back to the exterior to allow for the information on the LCD display to be conducted to an operator or device outside of the housing. 
   Thus, in connection with the sensing device mounting mechanisms, a light pipe can serve to channel light either from one or more indicator light sources on the sensing device to a location outside of the mounting mechanism so as to enhance and improve visibility of the light to an observer outside the mounting mechanism, or to channel light from the outside into the sensing device. The light pipe device often is designed to magnify or focus a light signal such as that provided by one or more LED&#39;s or other indicator lights that can be located inside of the housing  14 , so that the signal(s) can be received or viewed by an operator positioned exterior of the housing (i.e., outside of the mounting mechanism). While ordinarily designed to conduct light in the visible spectrum, in some alternate embodiments a light pipe can also be used to conduct light outside the visible range (e.g., infrared light). 
     FIG. 3  is a cross-sectional view of the sensing device mounting mechanism  12  taken along line  3 - 3  of  FIG. 2 . In the present embodiment, the mounting mechanism  12  again is shown to include generally mushroom-shaped housing  14  having substantially cylindrical stem portion  15  and flange portion  16 . Light pipe device  24  is shown coupled to the housing  14 , and includes a hollow, substantially cylindrical extension portion  25  that extends outwardly from the second end  19  of the housing  14  and a frustoconical portion  27  that protrudes into an interior  26  of the housing. Also as shown, the mounting mechanism  12  is secured (as noted above with respect to  FIG. 2 ) to supporting structure  13  by a plurality of snapping mechanisms  2   a - b . In the present embodiment, snapping features  20   a - b  are integral with the housing, although this is not required. Moreover, as a practical matter, the number, position, size and shape of the snapping mechanism(s) can vary to convenience. 
   Housing  14  further includes sensing device engagement extension rim  28  for receiving and securing a sensing device  29  within the interior  26 . More specifically, as shown, the sensing device  29  and the sensing device engagement extension rim  28  are in press-fit engagement with each other. Although not shown, in an alternative embodiment the extension rim  28  can comprise a dove tail-type mechanism that could slidably engage a slot created in a surface of the sensing device  29 . In the present embodiment, sensing device  29  is positioned within the interior  26  of housing  12  via orifice  30  formed within flange portion  16 . Still, the manner in which the sensing device is secured can vary to convenience, as can the structure(s) employed to do so. For example, the extension rim might take the form of discrete protrusions, as opposed to a continuous rim structure as shown in the present embodiment. Also, for example, the sensing device (or a structure on which it is supported) could be mounted on a swivel ball supported within the housing, as described in U.S. patent application Ser. No. 11/240,033, entitled “Sensor Mounting Structure with Adjustable Swivel Ball and Panel Mounting Mechanism” mentioned above, or supported by a rotatable yoke or set of springs, as described in co-pending U.S. patent application Ser. No. 11/240,034, entitled “Sensor Mounting Structure Allowing for Adjustment of Sensor Position” filed on even date herewith, which is hereby incorporated by reference herein. 
     FIG. 4  is a cross-sectional view, similar to that of  FIG. 3 , showing another sensing device mounting mechanism  32  including a light pipe  34  in accordance with at least one embodiment of the present invention. In the present embodiment, the mounting mechanism  32  again includes a housing  36  defining an interior  38 , and the housing includes a substantially cylindrical stem portion  40  and a flange portion  42 , as well as snapping features  44   a - b . Mounting mechanism  32  is mounted, so as to be secured via snap-fit engagement, to supporting structure  46 , as described above with respect to the embodiment illustrated in  FIGS. 2 and 3 . A sensing device  48  is positioned within the interior  38  of housing  36  as described above with respect to  FIGS. 2-3 , and is further secured via a press-fit, using extension rim  49 . Although not shown, in an alternative embodiment the extension rim  49  can comprise a dove tail-type mechanism that could slidably engage a slot created in a surface of the sensing device  48 . Sensing device, generally referred to by numeral  48 , is assembled from a plurality of components. More specifically, the sensing device includes a printed circuit board (or “PCB”)  50  that is used to couple various electronic components of the device  48 . One or more LED&#39;s  52  (e.g., leaded or surface mount LED&#39;s) are located on one side of the PCB  50 , while a optics holder or carrier  54  (typically housing optical sensors along with a transmitter) are located on the other side of the PCB. Lenses  56   a - b  are used to focus light for use by the sensing the device  48 . An optical shield (not shown) may be included to substantially prevent the sensing device  29  from being contaminated with light from extraneous sources (e.g., other than from a target area). The sensing device  49  is configured to provide output signals via the LED&#39;s  52  based upon the light signals received at the optics carrier  54 . The light pipe  34  serves to magnify the light from the LED so as to make the signals more visible to an operator monitoring the sensing device, or for provision to another destination (e.g., onto a fiber optics cable). 
     FIG. 5  is a cross-sectional view, similar to that of  FIG. 3 , showing another sensing device mounting mechanism  60  including a light pipe  62  in accordance with at least one embodiment of the present invention. In the present embodiment, the mounting mechanism  60  again includes a housing  64  defining an interior  66 . The housing  64  includes a substantially cylindrical stem portion  68  and a flange portion  70 , as well as snapping mechanisms  72   a - b . Here again, mounting mechanism  60  is mounted or coupled, so as to be secured via snap-fit engagement, to support structure  74 , as described above with respect to the embodiment illustrated in  FIGS. 2 and 3 . 
   In the present embodiment, stem portion  68  of housing  64  includes a main portion  78  and a hinged portion  80  that is hingedly coupled to the main portion. The light pipe  62  is coupled, as shown, to the hinged portion  80 . In one embodiment, the light pipe  62  can be formed such that it is mounted on (or even integral with) the hinged portion  80 . Hinged portion  80  further includes a snapping mechanism  82  for snap-fit engagement with the main portion  78  when the sensing device  76  is positioned within the housing interior  66  and the mounting mechanism  60  is its mounted position, ready for use. 
   In the embodiment of  FIG. 5 , the sensing device  76  is again positioned within the interior  66  of housing  64  and is further secured via a press-fit, using housing extension rim  61 . However, in the present embodiment, the sensing device  76  is placed into position within the interior  66  of the housing by raising hinged portion  80  to an open position (shown in phantom) and sliding, or otherwise positioning, the sensing device into the interior. Advantageously, the flanged portion  70  includes one or more stops  86 , which serve to further secure the sensing device. The hinged portion  80  can be rotated and locked (via the snap fit) to a closed position (shown), which typically coincides with its position when the mounting mechanism  60  is in its mounted position. End  83  of snapping mechanism  82  is used to properly position the sensing device within the housing  64 . Although not shown, in an alternative embodiment the extension rim  61  can comprise a dove tail-type mechanism that could slidably engage a slot created in a surface of the sensing device  76 . 
     FIG. 6  is a cross-sectional view, similar to that of  FIG. 3 , showing still another sensing device mounting mechanism  90  including a light pipe  92  in accordance with at least one embodiment of the present invention. In the present embodiment, the mounting mechanism  90  again includes a housing  96  defining an interior  98 . Further, in the present embodiment, the housing  96  includes two component portions, a stem portion  94  and a mushroom-like flange portion  100 . Stem portion  94  includes interior snapping mechanisms  102   a - b , and flange portion  100  includes interior snapping mechanisms  104   a - b . Here again, the size, shape, quantity and position of interior snapping mechanisms can vary to convenience. Stem portion  94  further includes disc-shaped extension rim  106 . A sensing device  108  is again positioned within the interior  98  of housing  96 . 
   Further, as shown, a sensing device  108  includes a plurality of notches or grooves  110  For receiving interior snapping mechanisms  102   a - b  and  104   a - b  of stem and flange portions  94 ,  100 , respectively, to secure the sensing device when mounted. In one embodiment, the notches  110  can be formed in a slot (not shown) so as to be positioned, one in front of another, in linear fashion. Mounting mechanism  90  is further shown to include a spring  118 , although while the spring is shown, it should be understood that a piece of foam, rubber, or other material having similar cushioning and/or spring-like characteristics, can be used in place of, or in conjunction with, the spring(s) as desired. In an alternative embodiment, the spring  118  could be replaced by leaf spring-type elements that may be either integrally molded to the stem portion rim  106 , or attached to the stem portion rim  106  as a separate piece. Exemplary leaf spring-type elements, as well as various uses of such elements, are described in U.S. patent application Ser. No. 11/240,034, entitled “Sensor Mounting Structure Allowing For Adjustment Of Sensor Position”. 
   The sensing device  108  can be mounted onto supporting structure  91  by using the mounting mechanism  90  in the following manner. Flange portion  100  can be fit or passed through orifice  101  of support structure  91  so that the flange portion and supporting structure abut or substantially abut one another. Flange portion fits over or around the sensing device  108 , and the interior snapping mechanisms,  102   a - b  snap into corresponding notches  110  on the sensing device so as to lock the sensing device in place relative to the flange portion  100 . The spring  118  is then slid over the sensing device  108  such that the spring is positioned in overlay relationship with respect to the sensing device, e.g., the spring fits concentrically around the flange portion  100  (and particularly around snapping mechanisms  104   a - b ), which surrounds the sensing device. Moreover, stem portion  98  is then slid over the sensing device  108 . When the stem portion  98  slides over the sensing device  108 , spring  118  is compressed by the rim  106  against the supporting structure  91  until interior snapping mechanisms  102   a - b  engage, via a snap-fit, complementary sensing device notches  110 . Advantageously, the flange portion  100  includes one or more stops  116 , which serve to further secure the sensing device  108  relative to the flange portion. Sensing device  108 , as a result, is positioned in a mounted position. Once compressed, the spring  118 , pushes the stem portion  94  away from the support structure  91 , and thereby acts as a tensioning device to hold, in cooperation with the interior snapping mechanism  102   a - b  and the snapping mechanisms  104   a - b , the sensing device and mounting mechanism in a mounted position. 
     FIG. 7  is a cross-sectional view, similar to that of  FIG. 3 , showing another sensing device mounting mechanism  120  including a light pipe  122  in accordance with at least one embodiment of the present invention. Here again, mounting mechanism  120  is mounted, so as to be secured via snap-fit engagement, to a supporting structure  134 , as described above with respect to the embodiment illustrated in  FIGS. 2 and 3 . In the present embodiment, the mounting mechanism  120  again includes a housing  124  defining an interior  126 . In the present embodiment, the housing  124  includes a substantially cylindrical stem portion  128 , a flange portion  130 , and an end cap portion  132 . End cap portion  132  further includes a pair of snapping mechanisms  133   a - b  for snap-fit engagement with the stem portion  128  when the sensing device  136  is positioned within the housing interior  126  and the mounting mechanism  120  is in its mounted position, ready for use. Sensing device  136  is again positioned within the interior  126  of housing  124  and is further secured via a press-fit, using housing extension rim  121 . Here again although not shown, in an alternative embodiment the extension rim  121  can comprise a dove tail-type mechanism that could slidably engage a slot created in a surface of the sensing device  136 . The light pipe  122  is coupled, as shown, to the end cap portion  132 . In one embodiment, the light pipe  122  can be formed such that it is integral with the end cap portion  132 . 
   In the present embodiment, the sensing device  136  is placed into position within the interior  126  of the housing  124  by removing end cap portion  132  and sliding, or otherwise positioning, the sensing device  136  into the interior of the housing. Advantageously, the flanged portion  130  includes stops  140 , which serve to further secure the sensing device  136 . The end cap portion  132 , having the light pipe device  122 , can then be positioned relative to the sensing device  136  as shown. Advantageously, ends  135   a - b  of snapping mechanisms  133   a - b , respectively, and the at least one stop  140 , abut the sensing device  136 . In this way, thus the snapping mechanisms  133   a - b  and the stop surface  140  can be used to appropriately position the sensing device  136  within the interior  126  of the housing  124 . 
   While the various figures illustrate the incorporation or use of a single light pipe for a given sensing device mounting mechanism, it should be understood that more than one light pipe device can be utilized, depending on the application at hand. Additionally, while the light pipe is positioned so as to protrude from second end of the housing, it should be understood that one or more light pipes can be mounted at a variety of locations on the mounting mechanism, e.g., at the first end or along the sides of the cylindrical stem portion. 
   While the mounting mechanism  12  can be constructed from a variety of materials, in one embodiment, the mechanism can comprise metallic material (e.g., aluminum), a molded plastic, and/or a molded polymeric material. In conjunction with the above, the sensing device mounting mechanism also in some embodiments can be mounted in a fixed, or substantially fixed, manner with respect to the supporting structure using, for example, one or more screws, bolts, an adhesive (or Velcro®) or any of a variety of other fastening devices or methodologies, albeit such fastening devices are not shown explicitly in the figures. 
   It is specifically intended that the present invention not be limited to the embodiments and illustrations contained herein, but include modified forms of those embodiments including portions of the embodiments and combinations of elements of different embodiments as come within the scope of the following claims.