Patent Publication Number: US-10317048-B2

Title: Pocket light

Description:
FIELD OF THE INVENTION 
     The invention relates generally to a light with a rotatable head. 
     BACKGROUND 
     Small lights have been used for many years. Small flashlights have become popular of late due to advances in the design of Light Emitting Diodes (LEDs) and the incorporation of LEDs into small lights of all types. While such lights have proven extremely effective due to their brightness and low battery power requirements, light design seems not to have taken full advantage of the light weight and small size advantages of LED technology. For example, small LED flashlights have been designed to be clipped onto the brim of ball caps. While sometimes clumsy due to their weight, they often do permit one to walk without holding a flashlight, thus freeing the hands for other things. Headlamps designed to be strapped to the head have proven even more effective in permitting the wearer to perform a variety of tasks. LED technology has also been incorporated into reading lamps, again providing brightness in a small package. 
     While such lights have taken advantage of lightweight LED technology, they seem to be somewhat limited in their versatility. For example, small LED lights are often designed to be part of a headlamp, a flashlight, a headlamp or reading light. Rarely has a light been designed that can be useful for all of these applications. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a front elevation view of an embodiment of the present disclosure; 
         FIG. 2  is a side elevation sectional view taken along line  2 - 2  of  FIG. 1 ; 
         FIG. 3  is an end elevation sectional view taken along line  3 - 3  of  FIG. 1 ; 
         FIG. 4  is an end elevation sectional view taken along line  4 - 4  of  FIG. 1 ; 
         FIG. 5  is a side elevation sectional view taken along line  5 - 5  of  FIG. 1 ; 
         FIG. 6  is a side elevation view of the embodiment of  FIG. 1 ; and 
         FIG. 7  is an end elevation view from the front of the embodiment of  FIG. 1 ; 
         FIG. 8  is an end elevation view from the rear of the embodiment of  FIG. 1 ; 
         FIG. 9  is a perspective view of the inside of a rear cap that may be used with the embodiment of  FIG. 1 ; 
         FIG. 10  is a circuit diagram of a circuit that may be used with the embodiment of  FIG. 1 ; 
         FIG. 11  is a fragmentary cutaway perspective view of the embodiment of  FIG. 1  showing the stops and leg that may limit rotation of the head of the embodiment of  FIG. 1 ; 
         FIG. 12  is a fragmentary cutaway perspective view of the embodiment of  FIG. 1  showing the slack in the wires that may be provided when the head of the embodiment of  FIG. 1  is in a central position; 
         FIG. 13  is a fragmentary cutaway perspective view of the embodiment of  FIG. 1  showing the taut wires when the head of the embodiment of  FIG. 1  is rotated in a clockwise direction; and 
         FIG. 14  is a fragmentary cutaway perspective view of the embodiment of  FIG. 1  showing the taut wires when the head of the embodiment of  FIG. 1  is rotated in a counter-clockwise direction. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     In the following detailed description, reference is made to the accompanying drawings which form a part hereof, and in which are shown by way of illustration embodiments that may be practiced. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope. Therefore, the following detailed description is not to be taken in a limiting sense, and the scope of embodiments is defined by the appended claims and their equivalents. 
     Various operations may be described as multiple discrete operations in turn, in a manner that may be helpful in understanding embodiments; however, the order of description should not be construed to imply that these operations are order dependent. 
     The description may use perspective-based descriptions such as up/down, back/front, and top/bottom. Such descriptions are merely used to facilitate the discussion and are not intended to restrict the application of disclosed embodiments. 
     A light having a body defining a battery casing for storing one or more batteries may be provided, also including a head rotatably mounted to the body. The head and the body typically including complementing, contacting, rounded portions, the head further including a light display and an LED light source. The LED light source is electrically connected to the battery casing for providing electrical power to the LED light source when batteries are disposed in the battery casing. 
     A pair of wires typically provide the electrical connection between the battery casing and the LED light source, the pair of wires include slack when the head is at a central position, the wires becoming more taut when the head is rotated in one direction or the other. 
     The light also preferably includes a spring-biased clip mounted to the body to permit the light to be clipped to another object, such as the bill of a cap, an article of clothing or the like. 
     The light may also include a switch to turn the light on and off, and a flexible plate disposed over the switch and mounted to the body such that be depressing the flexible plate the switch is turned on and off. 
     Another way to define this embodiment as a light having a body defining a battery casing for storing one or more batteries, a generally cylindrical head rotatably mounted to a complementing rounded portion of the body, the head further including a light display and a light source, the light source being electrically connected to the battery casing for providing electrical power to the light source when batteries are disposed in the battery casing. 
     The depicted embodiment provides a light that is compact, lightweight, and takes full advantage of LED technology in providing a bright light that still has the capability of permitting long battery life. Most importantly, the head of the light provides a capability of being rotated so that the user can take full advantage of the light, whether it be positioned on the bill of a ball cap, attached to the pocket of a shirt, or worn as part of a headlamp. 
       FIGS. 1 and 2  provide perhaps the best overall view of the depicted embodiment, identified generally with the numeral  10 . This embodiment of light  10  may include a head  12 , which is rotatably mounted to a body  14  that includes an internal casing designed to hold one or more batteries  16  to provide power for an LED lighting system  18  provided in the head. The LED shines through a lens  19  disposed at the front or on the top of head  12 . The term “rotatable” or “rotatably mounted” means that head  12  may be rotated at least part of a complete circle. As will be better appreciated as this discussion continues, that rotation might constitute 180 degrees of rotation or might be much less or even more than that. This rotation is provided so that the user is able to direct light from the LED  18  through lens  19  to shine in different directions. This might be for purposes of reading when light  10  is fastened to the bill of a cap or to a shirt pocket, or might be to permit the user to adjust quickly to lighting the ground at the user&#39;s feet or at the terrain ahead. 
     While the depicted head  12  is cylindrical, it should be understood that it is only necessary that a portion of the head be rounded such as at  11 , such that it complements a rounding  13  of the forward end of body  14 . That complementing rounding only needs to extend to the same extent that the head is designed to rotate. So, for example if the head is designed to rotate 45 degrees (22.5 degrees in either direction), there only needs to be complementing rounding for 22.5 degrees. 
     Continuing with the exterior features, light  10  may include a clip  20 , biased toward a closed position by spring  22 . Clip  20  may take just about any configuration as long as it is designed for a variety of uses, for example, to clip the light to another object such as a hat, headset, shirt pocket, coat sleeve, bike helmet, binoculars, etc. An on/off switch  24  may be provided in the side of body  14  opposite clip  20 , although most any conventional positioning would suffice as long as it is easy to find and activate with little fumbling. In the depicted embodiment, switch  24  is actually disposed under a flexible exterior plate  26 , which may be depressed to activate the switch. One advantage of the depicted construction is that plate  26  is enlarged so the light may be turned on and off by a user wearing gloves or mittens. 
     The rear of the depicted light  10  is provided with a rotatable knob  28 , the functioning of which is best shown in  FIGS. 2 and 9 . Knob  28  may be mounted to an internal nut (see  FIG. 9 ), which engages an interior shoulder  30  to pull a rear cap  32  against the rear of body  14  to create what preferably is a watertight seal. An O-ring  34  may be provided if desirable. Because light  10  is designed for a wide variety of uses, any one of which might be in the rain or might involve other momentary dousing with water, this may be a desirable feature. Knob  28  may be unscrewed to release rear cap  32  and permit replacement of battery or batteries  16 . Knob  28  may be enlarged and have ridges around its circumference so that it too may be turned with minimal difficulty by a user wearing gloves or mittens. 
     Knurled or ridged surfaces may be provided on the distal end of clip  20  as shown at  36  to facilitate a secure engagement with the material or object to which the light is clipped. Such surfaces may also be provided in head  12 , although the depicted embodiment includes a plurality of ridges  38 . Either will be suitable to provide an engagement surface to permit grasping and rotation of the head. In the depicted embodiment, ridges  38  are provided only on the ends of head  12 . 
     The electrical circuitry for light  10  is shown generally at  40 , but it may be of conventional design using appropriate resistors, capacitors, relays, diodes, inductors, grounds and the like. A chip on board (COB) system may be used as an LED system  18  to provide light to shine through lens  19 , such a system comprising multiple LED chips bonded to a substrate to form a single module. The multiple LEDs are preferably shielded with a phosphorous cover to diffuse the light so the light appears as a single spotlight or floodlight through the display. 
       FIG. 10  illustrates an example of electrical circuitry  40  that may be implemented within light  10 . The circuitry may include a light-emitting diode (LED) D 4  and a LED D 5 . The LED D 4  and the LED D 5  may be located within the COB system  18  (see  FIG. 2 ). The LED D 4  and the LED D 5  may be different color LEDs, may produce different wavelengths of light, may be associated with different colored lenses to produce different colors of light, or some combination thereof. In some examples, the LED D 4  may be a white LED and the LED D 5  may be a red LED. In other examples, the LED D 4  may be a white LED and the LED D 5  may be an ultraviolet LED. While the LED D 4  and the LED D 5  are described as single LEDs throughout the description of  FIG. 10 , it is to be understood that the LED D 4  may be a first array of multiple LEDs having the same characteristics and/or the LED D 5  may be a second array of multiple LEDs having the same characteristics. Further, the characteristics of the first array may be different from the characteristics of the second array. 
     The electrical circuitry  40  may further include a processor U 2 . The processor U 2  may include a pin P 13 /XOUT coupled to switch S 1 . The processor U 2  may detect activation of the switch S 1 . The activation of the switch S 1  in the illustrated example includes a first state of the switch S 1  that couples the pin P 13 /XOUT to ground  50 , whereas deactivation of the switch S 1  occurs when the switch S 1  is in a second state that decouples pin P 13 /XOUT from the ground  50 . 
     The processor U 2  may control outputs of pin P 00 /INTO and pin P 10  based on the activation of the switch S 1 . The pin P 00 /INTO may be coupled to transistor Q 1  and control activation of the transistor Q 1  (i.e. current flow between the source and drain of the transistor Q 1 ). When the transistor Q 1  is activated (i.e. current is flowing between the source and drain of transistor Q 1 ) by the output of the pin P 00 /INTO, current may pass through the LED D 4 , causing the LED D 4  to produce light. When the transistor Q 1  is deactivated (i.e. current is not flowing between the source and drain) by the output of the pin P 00 /INTO, the transistor Q 1  may prevent current from passing through the LED D 4 , causing the LED D 4  to not produce light. 
     The pin P 10  of processor U 2  may be coupled to transistor Q 2  and control activation of the transistor Q 2  (i.e. current flow between the source and drain of the transistor Q 2 ). When the transistor Q 2  is activated (i.e. current is flowing between the source and drain of transistor Q 2 ) by the output of the pin P 10 , current may pass through the LED D 5 , causing the LED D 5  to produce light. When the transistor Q 2  is deactivated (i.e. current is not flowing between the source and drain) by the output of the pin P 10 , the transistor Q 2  may prevent current from passing through the LED D 5 , causing the LED D 5  to not produce light. 
     The processor U 2  may transition between two or more states based on the detection of activation of the switch S 1 , where transistor Q 1  and transistor Q 2  may be activated, deactivated, or some combination thereof, in the different states. In some examples, the processor U 2  may transition between three states. In a first state, the processor U 2  may deactivate the transistor Q 1  and the transistor Q 2 , causing the LED D 4  and the LED D 5  to not produce light. In response to detecting an activation of the switch S 1  while in the first state, the processor U 2  may transition from the first state to a second state, where the U 2  activates the transistor Q 1  and deactivates the transistor Q 2 , causing the LED D 4  to produce light and the LED D 5  not to produce light. In response to detecting an activation of the switch S 1  while in the second state, the processor U 2  may transition from the second state to a third state, where the processor U 2  activates both the transistor Q 1  and the transistor Q 2 , causing the LED D 4  and the LED D 5  to produce light. In response to detecting an activation of the switch S 1  while in the third state, the processor U 2  may transition back to the first state with the transistor Q 1  and the transistor Q 2  deactivated. 
     Circuitry  40  may further include one or more other circuit elements. The other circuit elements may include capacitor C 1 , capacitor C 2 , capacitor C 3 , capacitor C 4 , capacitor C 5 , inductor L 1 , inductor L 2 , resistor R 2 , resistor R 4 , resistor R 5 , resistor R 6 , resistor R 7 , diode D 1 , diode D 2 , or some combination thereof. The other circuit elements may be selected based on the characteristics of the processor U 2 , the LED D 4 , the LED D 5 , the transistor Q 1 , the transistor Q 2 , the switch S 1 , a voltage of a battery coupled to the electrical circuitry  40  (indicated by battery connection BAT+) or some combination thereof. 
     The preferred embodiment includes two AAA batteries although more or fewer batteries of other size may alternatively be provided. Batteries  16  are mounted in a conventional fashion such that wires  60  extend from battery casing  15  through at least one channel, although a pair of channels  61  are depicted in  FIGS. 12-14 . Cutouts  63  may be provided through which the wires can extend.  FIG. 12  illustrates that wires  60  may include extra slack or length to facilitate rotation of head  12 .  FIGS. 13 and 14  show the head rotated to one side and then the other in a 180-degree range. However, more or less rotational range may be desirable. Stops such as those shown at  62  may be provided to limit the range of rotation along with a leg  64  that is designed to abut the stops when head  12  is at the full extent of the desired rotation. However, in lieu of stops  62  and leg  64 , the extent of rotation may be limited simply by that range being the extent of the complementing rounding  11  of head  12  and the rounding  13  of body  14 . In  FIG. 11  that range is shown to be 270 degrees, while in  FIGS. 13 and 14 , that range is shown to be about 180 degrees. As noted earlier, the range of rotation may be more or less than either of those ranges.  FIG. 12  shows head  12  in its central position whereas  FIG. 13  shows it rotated in a clockwise direction from the perspective of that Fig., while  FIG. 14  shows the head rotated in the opposite direction. 
     Thus described, the depicted embodiment provides a compact, lightweight, bright, and versatile light having a head that can be rotated to a wide variety of positions to give the user, whether it be a reader, hiker, bike rider, bird watcher or other hobbyist, a selection of positions in which to direct the LED system  18  (via lense  19 ). In certain embodiments light  10  can include clip  20 , which provides even greater versatility to the user. 
     Although certain embodiments have been illustrated and described herein, it will be appreciated by those of ordinary skill in the art that a wide variety of alternate and/or equivalent embodiments or implementations calculated to achieve the same purposes may be substituted for the embodiments shown and described without departing from the scope. Those with skill in the art will readily appreciate that embodiments may be implemented in a very wide variety of ways. This application is intended to cover any adaptations or variations of the embodiments discussed herein. Therefore, it is manifestly intended that embodiments be limited only by the claims and the equivalents thereof.