CROSS-REFERENCE TO RELATED APPLICATIONS
BACKGROUND
Field of the Invention
[0002] The present invention generally relates to light producing devices and more particularly
relates to light producing devices with switchable light sources.
Related Art
[0003] As is well known, light producing devices are typically configured to perform only
a single function, namely, to illuminate areas of interest. For example, conventional
lighting devices are typically implemented with mechanical and electrical structures
directed to performing this single function.
[0004] Unfortunately, such conventional lighting devices have various limitations. For example,
although such devices are useful for illumination with white light, there are often
instances when illumination with other colors of visible light is desirable. There
are also instances when illumination with infrared light, ultraviolet, light, or other
wavelengths is desirable. Accordingly, there is a need for an improved lighting device
that overcomes one or more of the deficiencies discussed above.
SUMMARY
[0005] A lighting device is provided which may be operated to selectively provide various
types of light, such as light of different wavelengths, in response to user-actuated
controls. Related methods of operation are also provided.
[0006] In one embodiment, a lighting device includes a plurality of light sources, a body,
a head, and one or more controls adapted to adjust operation of the light sources.
The body includes a housing. The head includes a bezel adapted to rotate relative
to the body to select between at least a first one of the light sources and a second
one of the light sources. The head also includes a lens adapted to rotate eccentrically
relative to a centerline of the head in response to rotation of the bezel. The lens
includes a light inlet adapted to be selectively positioned over the first light source,
the second light source, or neither of the light sources as the lens rotates eccentrically
relative to the centerline of the head.
[0007] In another embodiment, a method of operating a lighting device is provided. The lighting
device includes a plurality of light sources, a head including a bezel, a lens, and
a lock ring, a body including a housing, and one or more controls adapted to adjust
operation of the light sources. The method includes urging the lock ring from a locked
position to an unlocked position. The lock ring is adapted to prevent rotation of
the bezel while the lock ring is in the locked position and permit rotation of the
bezel while the lock ring is in the unlocked position. The method also includes rotating
the bezel to select a first one of the light sources or a second one of the light
sources. The rotating causes the lens to rotate eccentrically relative to a centerline
of the head. The lens includes a light inlet adapted to be selectively positioned
over the first light source, the second light source, or neither of the light sources
as the lens rotates eccentrically relative to the centerline of the head. The method
also includes returning the lock ring to the locked position.
[0008] In another embodiment, a lighting system includes a lighting device. The lighting
device includes a plurality of light sources, a body, a head, and one or more controls
adapted to adjust operation of the light sources. The body includes a housing, a connector,
and a mounting surface. The head includes a bezel adapted to rotate relative to the
body to select between at least a first one of the light sources and a second one
of the light sources. The head also includes a lens adapted to rotate eccentrically
relative to a centerline of the head in response to rotation of the bezel. The lens
includes a light inlet adapted to be selectively positioned over the first light source,
the second light source, or neither of the light sources as the lens rotates eccentrically
relative to the centerline of the head. The lighting system also includes a remote
switch. The connector is adapted to receive the remote switch to control at least
one of the light sources. The lighting system also includes a rail clamp mount. The
mounting surface is adapted to engage with the rail clamp mount to attach the lighting
device to a weapon.
[0009] In another embodiment, a lighting device includes a plurality of light sources, a
body, a head, and one or more controls adapted to adjust operation of the light sources.
The body includes a housing. The head includes a bezel adapted to rotate relative
to the body to select between at least a first one of the light sources and a second
one of the light sources. The head also includes a reflector adapted to rotate eccentrically
relative to a centerline of the head in response to rotation of the bezel. The reflector
comprises a light inlet adapted to be selectively positioned over the first light
source, the second light source, or neither of the light sources as the reflector
rotates eccentrically relative to the centerline of the head.
[0010] In another embodiment, a lighting device comprises a generally tubular heat sink
having a central axis and a generally tubular bezel disposed for concentric rotation
about the heat sink. The bezel has a central axis disposed coaxially with the central
axis of the heat sink and defines a common central axis therewith. A lens is disposed
in the bezel for conjoint rotation therewith. The lens has a light inlet and an optical
axis that is concentric with the inlet and disposed parallel to and offset from the
common central axis, such that rotation of the bezel relative to the heat sink causes
the light inlet and optical axis to rotate through a cylindrical arc about the common
central axis. A plurality of light sources is disposed on the heat sink, behind the
light inlet of the lens and at respective angular positions around the arc, such that
rotation of the bezel about the common central axis and to angular positions corresponding
to the respective angular positions of the light sources disposes the light inlet
and optical axis of the lens in axial alignment with corresponding ones of the light
sources.
[0011] In another embodiment, a lighting device includes a main member including a central
axis. The lighting device also includes a bezel surrounding at least a portion of
the main member and adapted to be concentrically rotated about the central axis. The
lighting device also includes a lens asymmetrically disposed in the bezel and adapted
to rotate with the bezel. The lens includes a light inlet offset from the central
axis. The lighting device also includes a plurality of light sources fixed relative
to the main member. Rotation of the bezel relative to the main member causes the light
inlet to rotate through an arc about the central axis to selectively align different
ones of the light sources with the light inlet.
[0012] In another embodiment, a method of operating a lighting device is provided. The lighting
device includes a main member including a central axis, a bezel surrounding at least
a portion of the main member, a lens asymmetrically disposed in the bezel and adapted
to rotate with the bezel and comprising a light inlet offset from the central axis,
and a plurality of light sources fixed relative to the main member. The method includes
concentrically rotating the bezel about the central axis relative to the main member.
The rotating causes the light inlet to rotate through an arc about the central axis
to selectively align different ones of the light sources with the light inlet.
[0013] The scope of the invention is defined by the claims. A more complete understanding
of embodiments of the present invention will be afforded to those skilled in the art,
as well as a realization of additional advantages thereof, by a consideration of the
following detailed description of one or more embodiments. Reference will be made
to the appended sheets of drawings that will first be described briefly.
BRIEF DESCRIPTION OF THE FIGURES
[0014] Figs. 1A-C illustrate a lighting device attached to a weapon using various configurations
in accordance with several embodiments of the invention.
[0015] Figs. 2A-B illustrate a lighting device connected to a switch and a rail clamp mount
in accordance with several embodiments of the invention.
[0016] Figs. 3A-H illustrate a lighting device in accordance with several embodiments of
the invention.
[0017] Fig. 4 illustrates an exploded view of a lighting device in accordance with an embodiment
of the invention.
[0018] Fig. 5A illustrates a cross-sectional side view of a lighting device attached to
a rail clamp mount in accordance with an embodiment of the invention.
[0019] Fig. 5B illustrates a cross-sectional front view of a head of a lighting device in
accordance with an embodiment of the invention.
[0020] Figs. 6A-B illustrate relative positions of a light inlet and light sources when
a bezel of a lighting device is rotated in different positions in accordance with
several embodiments of the invention.
[0021] Fig. 7 illustrates an electrical schematic of a lighting device in accordance with
an embodiment of the invention.
[0022] Figs. 8A-B illustrate a remote switch which may be connected to a lighting device
in accordance with several embodiments of the invention.
[0023] Fig. 8C illustrates an exploded view of a remote switch which may be connected to
a lighting device in accordance with an embodiment of the invention.
[0024] Fig. 9A illustrates a lighting device with an indicator button in an expanded position
in accordance with an embodiment of the invention.
[0025] Figs. 9B illustrates a cross-sectional front view of a heat sink of a lighting device
with an indicator button in a retracted position in accordance with an embodiment
of the invention.
[0026] Figs. 9C illustrates a cross-sectional front view of a heat sink of a lighting device
with an indicator button in an expanded position in accordance with an embodiment
of the invention.
[0027] Fig. 10A is an upper, front end perspective view of another head of a lighting device
in accordance with an embodiment of the invention.
[0028] Fig. 10B is an upper, front end exploded perspective view of the head of Fig. 10A
in accordance with an embodiment of the invention.
[0029] Figs. 11A and 11B are enlarged front end elevation views of the head of Fig. 10A,
respectively showing a bezel and a lens of the device rotated to first and second
angular positions relative to a heat sink of the device in accordance with an embodiment
of the invention.
[0030] Fig. 12 is a left side cross-sectional view of the head of Fig. 10A as seen along
the lines of the section 12 - 12 taken in Fig. 10A in accordance with an embodiment
of the invention.
[0031] Fig. 13 is a cross-sectional view of the head of Fig. 12 as seen along the lines
of the section 13 - 13 taken therein, and with several components removed for clarity
of illustration, in accordance with an embodiment of the invention.
[0032] Fig. 14 is an upper front perspective view of a lighting device including a head
providing similar features to that of Fig. 10A and further including a body useful
for coupling the lighting device to a pistol in accordance with an embodiment of the
invention.
[0033] Fig. 15 is an upper front perspective view of a lighting device including the head
of Fig. 10A and further including a body useful for coupling the lighting device to
a rifle in accordance with an embodiment of the invention.
[0034] Embodiments of the present invention and their advantages are best understood by
referring to the detailed description that follows. It should be appreciated that
like reference numerals are used to identify like elements illustrated in one or more
of the figures.
DETAILED DESCRIPTION
[0035] In accordance with various embodiments provided herein, a lighting device may be
implemented to selectively provide various types of light, such as light of different
wavelengths, in response to user-actuated controls. For example, in one embodiment,
such a lighting device may be a weapon-mountable lighting device providing convenient
access to user controls for selectively configuring (e.g., adjusting) the operation
of the lighting device. For example, such user controls may be used to adjust the
switching of light sources as well as the brightness and wavelengths of light emitted
by such light sources. In one embodiment, such light sources may be implemented with
a plurality of light emitting diodes (LEDs) which may be selectively activated and
selectively dimmed to provide light of different wavelengths. Light sources other
than LEDs may be used in other embodiments.
[0036] Such a lighting device may be used in any desired combination with the various features
identified in the present disclosure to provide a lighting system. In certain embodiments,
such a lighting system may be particularly suited for use in tactical and combat environments
(e.g., for mounting on weapons or other devices). In other embodiments, the lighting
system may be used in any desired environment and for any desired application.
[0037] Referring now to the drawings wherein the showings are for purposes of illustrating
embodiments of the present invention only, and not for purposes of limiting the same,
Figs.1A-C illustrate a lighting device 100 attached to a weapon 101 using various
configurations in accordance with several embodiments of the invention.
[0038] For example, as shown in Fig. 1A, lighting device 100 may be attached to a rail 109
of weapon 101 using a rail clamp mount 102. In one embodiment, rail clamp mount 102
may be implemented in accordance with a rail clamp mount described in
U.S. Patent Application No. 11/646,870 entitled "RAIL CLAMP MOUNT" filed December 27, 2006, which is hereby incorporated
by reference herein in its entirety. In other embodiments, other rail clamp mounts
may be used as appropriate.
[0039] As also shown in Fig. 1A, lighting device 100 includes an inclined external surface
132 which is inclined (e.g., angled) relative to rail 109 and a barrel of weapon 101
while lighting device 100 is attached to rail 109 by rail clamp mount 102. In one
embodiment, inclined external surface 132 may be inclined relative to a centerline
of a head of lighting device 100 and also inclined relative to a direction of light
(e.g., light beams) provided by lighting device 100 (e.g., in Fig. 1A, lighting device
100 may provide light beams that are substantially parallel to the barrel of weapon
101). For example, in such an embodiment, inclined external surface 132 may be inclined
approximately twelve degrees relative to the centerline and the direction of light.
In other embodiments, other angles of inclination may be used.
[0040] Inclined external surface 132 may provide convenient access to a dome switch 130
of lighting device 100 by a user of weapon 101. In addition, the inclined external
surface 132 and the external shape of a housing 190 of lighting device may permit
the user to conveniently pull lighting device 100 toward the user while lighting device
100 is mounted on weapon 101 and the user is operating weapon 101.
[0041] As another example, as shown in Fig. 1B, lighting device 100 may be attached to rail
109 of weapon 101 using a rail clamp mount 102 and further attached to a remote switch
106 in accordance with an embodiment of the invention. Remote switch 106 may be positioned
for convenient access by a user of weapon 101 to aid the user in controlling lighting
device 100 while the user also operates weapon 101. Figs. 2A-B provide further views
of lighting device 100 connected to remote switch 106 and rail clamp mount 106 in
accordance with several embodiments of the invention.
[0042] As another example, as shown in Fig. 1C, lighting device 100 may be attached to rail
109 of weapon 101 using a rail clamp mount 102 and further attached to remote switch
106 as discussed above. In accordance with an embodiment of the invention, a vertical
grip 108 may also be attached to rail 109 of weapon 101. In this embodiment, vertical
grip 108 may provide a convenient resting location for a hand of the user of weapon
101. For example, the user may conveniently actuate remote switch 106 (e.g., by way
of the user's thumb or finger) while holding vertical grip 108. In another embodiment,
vertical grip 108 may include one or more switches which may be connected to lighting
device 100 for controlling lighting device 100.
[0043] Figs. 3A-H illustrate lighting device 100 in accordance with several embodiments
of the invention. Lighting device 100 includes a head 110 and a body 120. Head 110
includes a bezel 103 that may rotate relative to body 120 to permit the user to select
different wavelengths of light.
[0044] One or more lenses (e.g., one or more substantially flat lenses and/or one or more
lenses of any other desired shape) and a plurality of light sources may be provided
in head 110 to permit different wavelengths of light to be provided by lighting device
100. Although lighting device 100 is primarily described herein as having a lens,
other embodiments are also contemplated. For example, in various embodiments, one
or more reflectors (e.g., one or more substantially parabolic reflectors and/or one
or more reflectors of any other desired shape) may be used in place of, or in addition
to, one or more lenses.
[0045] Head 110 also includes a lock ring 104 (also referred to as a selector ring) that
may be used to lock bezel 103 in any one of several possible positions and may also
rotate with bezel 103. In one embodiment, lock ring 104 may be configured such that
it locks the bezel 103 in position when lock ring 104 is positioned rearwardly (e.g.,
toward body 120), and such that it allows the bezel 103 to rotate when lock ring 104
is positioned forwardly (e.g., away from body 120). Thus, to select a desired position
of bezel 103 (e.g., to select a desired light source), the user may urge (e.g., push,
slide, or otherwise translate) lock ring 104 toward the front of head 110 (e.g., forward
or away from body 120), rotate bezel 103 to the desired position, and then urge (e.g.,
push, slide, or otherwise translate release) lock ring 104 toward the back of head
110 (e.g., rearward or toward body 120) to lock bezel 103 in the desired position.
In one embodiment, lock ring 104 may be loaded (e.g., spring loaded by springs 521-523
shown in Fig. 4) such that lock ring 104 remains biased toward body 120 when not urged
by the user. As a result, the user may release lock ring 104 after bezel 103 has been
rotated to the desired position (e.g., rather than requiring the user to actively
urge lock ring 104 toward the back of head 110.
[0046] Lock ring 104 includes a marker 112 (e.g., an arrow or any appropriate indicia) which
may be used to indicate the position of bezel 103 relative to body 120. In one embodiment,
bezel 103 may be rotated to any of three possible positions such that marker 112 is
located proximate a position 122, a position 124, or a position 126 of body 120. When
bezel 103 is rotated such that marker 112 is located next to position 122 (labeled
with an index mark "DISABLE"), light output from lighting device 100 may be disabled.
When bezel 103 is rotated such that marker 112 is located next to position 124 (labeled
with an index mark "IR"), lighting device 100 may provide infrared light. When bezel
103 is rotated such that marker 112 is located next to position 126 (labeled with
an index mark "WHITE"), lighting device 100 may provide white light (e.g., visible
white light). In other embodiments, any desired number of positions and any desired
types of light (e.g., ultraviolet light or other types) may be provided.
[0047] As shown in Figs. 3A-H, lighting device 100 includes various additional controls.
For example, a dome switch 130 may be provided on inclined external surface 132 to
control lighting device 100. In several embodiments, dome switch 130 may be used to
switch lighting device 100 on and off in accordance with various modes of operation.
For example, dome switch 130 may operate with other circuitry (e.g., see Fig. 7) to
select a momentary on mode (e.g., in which lighting device 100 provides light while
dome switch 130 is held in an on position by the user), a constant on mode (e.g.,
in which lighting device 100 continues to provide light after dome switch 130 has
been twice depressed and released in quick succession by the user), and a flashlight
mode (e.g., in which lighting device 100 may be used as a flashlight such as when
lighting device 100 is detached from weapon 101).
[0048] Lighting device 100 also includes a rotary switch 140 which may be used to select
various levels of light output (e.g., low, medium, and high as indicated by the labels
"LOW," "MED," and "HIGH") provided by an infrared light source of lighting device
100 (e.g., when head 110 is rotated such that marker 112 of lock ring 104 is proximate
position 124).
[0049] Lighting device 100 also includes a rotary switch 142 which may be used to select
various levels of light output (e.g., flashlight brightness, medium, and high as indicated
by the labels "FLASHLT," "MED," and "HIGH") provided by a visible light source of
lighting device 100 (e.g., when head 110 is rotated such that marker 112 of lock ring
104 is proximate position 126). Rotary switch 142 may also be used to select a strobe
mode of operation (e.g., as indicated by the label "STRB") in which the visible light
source of lighting device 100 pulses on and off in a strobe-like fashion.
[0050] In one embodiment, rotary switches 140 and 142 may be provided on substantially opposite
sides of housing 190. Such an implementation may provide the user with convenient
access to both of rotary switches 140 and 142 when operating weapon 101.
[0051] Lighting device 100 also includes a latch 150 which may be used to secure a tail
cap 740. Lighting device 100 also includes mounting surfaces 170 which may engage
with rail clamp mount 102 to connect lighting device 100 to remote switch 106 the
manner shown in Figs. 2A-B.
[0052] Lighting device 100 also includes a connector 160 configured to receive remote switch
106 to connect remote switch 106 or other switches (e.g., a switch provided by vertical
grip 108 or otherwise) to lighting device 100 in the manner shown in Figs. 2A-B. In
several embodiments, connector 160 may be implemented to be compatible with switches
described in
U.S. Patent Nos. 7,273,292 and
7,441,918 which are both hereby incorporated by reference herein in their entirety. In other
embodiments, other connectors may be used as appropriate.
[0053] Lighting device 100 may also include an indicator button 195 (e.g., a physical tactile
surface). In one embodiment, indicator button 195 may be an infrared indicator button
which provides tactile feedback to the user to indicate that lighting device 100 has
been configured to provide infrared light without requiring the user to visually check
the position of lock ring 104 or activate lighting device 100. In other embodiments,
indicator button 195 may be used to indicate any desired configuration of lighting
device 100.
[0054] Fig. 4 illustrates an exploded view of lighting device 100 in accordance with an
embodiment of the invention. Fig. 4 further illustrates rail clamp mount 102 which
may be secured to mounting surfaces 170 by screws 102A and 102B.
[0055] As shown in Fig. 4, a lens retainer 501 may secure a planar lens 503 and a total
internal reflection (TIR) lens 504 into a TIR housing 506. A flat gasket 502 may be
disposed between lens retainer 501 and planar lens 503. An o-ring 505 may be disposed
between the TIR lens 504 and the TIR housing 506. Lens retainer 501 may be threaded
into TIR housing 506 so as to capture flat gasket 502, planar lens 503, TIR lens 504,
and o-ring 505 between lens retainer 501 and TIR housing 506.
[0056] In one embodiment, planar lens 503 may be a substantially a flat (e.g., plano-plano)
lens. It is contemplated that planar lens 503 may be implemented in accordance with
any desired type of lens in other embodiments. In one embodiment, TIR lens 504 may
be implemented as a solid optical element that uses total internal reflection to direct
light from a selected light source (e.g., an LED or other light source) to planar
lens 503. Planar lens 503 and TIR lens 504 may be formed of glass, plastic, or any
other desired material that is substantially transparent at the wavelengths of light
produced by the light sources. Indeed, any desired combination of material and types
of lenses may be used.
[0057] TIR housing 506 may thread into the bezel 103. An o-ring 507 may be captured between
TIR housing 506 and bezel 103. Bezel 103 may include a magnet 511 that is disposed
within an opening 512 (see Fig. 5A) of bezel 103.
[0058] In an embodiment implemented with two light sources, bezel 103 may be used to select
one light source at one extreme of its rotation and may be used to select another
light source at the other extreme of its rotation. In one embodiment, bezel 103 may
be rotated a maximum of approximately 135 degrees.
[0059] A bezel retainer 508 may thread onto heat sink 105 so as to capture and retain bezel
103 upon heat sink 105. A flat gasket 509 may be disposed between bezel retainer 508
and heat sink 105. Bezel 103 may have a bore (such as bore 651 of Fig. 5A) that is
off center or eccentric with respect to a centerline 600 of head 110 (see Fig. 5A).
Thus, rotation of bezel 103 may result in off center or eccentric rotation of bezel
103, as well as of components attached to bezel 103, such as TIR lens 504.
[0060] An o-ring 514 may be captured between bezel 103 and lock ring 104. A plurality of
springs (e.g., three springs 521-523) may bear upon lock ring 104 and bezel 103 in
a manner that tends to urge lock ring 104 away from the bezel 103 (e.g., rearwardly)
and that thus tends to maintain lock ring 104 in the locked position thereof. That
is, springs 521-523 may bias lock ring 104 toward body 120.
[0061] Spring 521-523 may be received within a detent 530. Detent 530 may be received within
one of a plurality of holes, such as a hole 531 (see Fig. 5A), to lock bezel 103 into
position with respect to heat sink 105. In one embodiment, the number of such holes
may conform to the number of positions in which it is desired for bezel 103 to lock
into position. In one embodiment, the number of such positions of bezel 103 may conform
to the number of different light sources of lighting device 100 that may be selected
by the user. In one embodiment, one of the holes, such as hole 531, may be used to
lock bezel 103 into a position in which marker 112 is proximate position 124 for selecting
an infrared light source, and another one of the holes may be used to lock bezel 103
into a position in which marker 112 is proximate position 126 for selecting a white
light source. The holes may be spaced apart by any desired distance. Thus, the distance
or angle through which bezel 103 is rotated to select different light sources may
be any desired distance or angle.
[0062] Lock ring 104 may slide over and be slidably disposed upon bezel 103. In turn, bezel
103 may slide over and be rotatably disposed upon heat sink 105. Two o-rings 541 and
542 may be disposed upon heat sink 105, between bezel 103 and heat sink 105. O-rings
541 and 542 may provide a bearing surface that facilitates rotation of bezel 103 with
respect to heat sink 105.
[0063] Heat sink 105 may receive and mount a light source printed circuit board (PCB) 550.
Light source PCB 550 may be attached to heat sink 105 via screws 551 and 552. PCB
550 may include one or more light sources (e.g., LEDs and/or other types of light
sources) attached thereto. In one embodiment, such LEDs may be implemented using one
or more dies (e.g., multiple die LEDs). In one embodiment, one or more white light
LEDs and one or more infrared LEDs may be attached to light source PCB 550. Heat sink
105 may operate as a heat sink for light sources that are attached to light source
PCB 550. Thus, heat sink 105 may dissipate heat from the light sources to other parts
of lighting device 100 and to ambient air. As also shown in Fig. 4, an o-ring 573
may be disposed between heat sink 105 and housing 190. Heat sink 105 may also include
indicator button 195, a pin 197, and a spring 199 further described herein.
[0064] A control PCB 560 may be received within heat sink 105, such as within the end thereof
that attaches to housing 190 by screws 105A, 105B, and 716. In one embodiment, control
PCB 560 may be implemented using two stacked PCBs as shown in Fig. 4. Light source
PCB 550 and/or control PCB 560 may be electrically connected to one or more batteries
provided within a cavity 151 (see Fig. 5A) of housing 190.
[0065] Control PCB 560 may include circuitry to determine which, if any, of the light sources
are to be illuminated, and also to illuminate the selected light source. Thus, control
PCB 560 may receive electric power from one or more batteries and provide electric
power to the selected light source. In one embodiment, heat sink 105 may make electrical
contact with housing 190 which may be electrically connected to a terminal of one
or more batteries to provide an electrical connection. One or more additional electrical
connections may be implemented using appropriate springs, wires, or other techniques
which will be appreciated by those skilled in the art.
[0066] More particularly, one or more Hall effect sensors may be attached to control PCB
560 to sense the current position of bezel 103. For example, two Hall effect sensors
571 and 572 may be attached to control PCB 560 to sense the position of magnet 511
that is attached to the bezel 103. In this manner, the position to which bezel 103
has been rotated may be sensed to determine which light source is to be illuminated
by control PCB 560.
[0067] As shown in Fig. 4, dome switch 130 may be assembled using screws 702, a switch plate
704, a button pad 706, a switch 708, and a switch PCB 710.
[0068] As also shown in Fig. 4, rotary switches 140/142 may be assembled using knobs 720/760,
dowel pins 722/762, caps 724/764, gaskets 726/766, switches 728/768 (e.g., switches
permitting approximately 135 degree rotation in one embodiment), switch PCBs 730/770,
and pins 732/772.
[0069] As also shown in Fig. 4, connector 160 may be assembled using a receptacle 750, an
o-ring 752, screws 754, a connector plate 756, and a gasket 758. Connector 160 may
interface with control PCB through appropriate electrical connections as will be appreciated
by those skilled in the art.
[0070] Lighting device 100 may further include latch 150, a spring 712 (e.g., for spring
loading latch 150), a pin 714, pins 734/736, tail cap 740, and screws 742. In addition,
lighting device 100 may further include battery contact springs 744/745 and battery
contact PCB 746, all of which may be used to provide appropriate electrical connections
between one or more batteries, light source PCB 550, and/or control PCB 572.
[0071] In one embodiment, the structural components of lighting device 100 may be formed
of a metal, such as aluminum, magnesium, or steel. In another embodiment, these structural
components may be formed of a durable plastic, such a polycarbonate or acrylonitrile
butadiene styrene (ABS), or any other material as desired. In another embodiment,
the structural components proximate magnet 511 (e.g., bezel 103 and heat sink 105)
may be formed of a non-ferrous material such that sensing of magnet 511 by Hall effect
sensors 571 and 572 is not substantially inhibited thereby.
[0072] Fig. 5A illustrates a cross-sectional side view of lighting device 100 attached to
rail clamp mount 102 in accordance with an embodiment of the invention. As shown in
Fig. 5A, a light source assembly 601 may include a plurality of light sources that
are attached to light source PCB 550. Light source assembly 601 may include one or
more white light sources, one or more infrared light sources LEDs, one or more ultraviolet
light sources, and/or other types of light sources. In one embodiment, light source
assembly 601 may include a plurality of white light LEDs that are grouped together,
and may further include a plurality of infrared light LEDs that are grouped together.
[0073] In one embodiment, light source assembly 601 may be configured such that none of
the light sources are on centerline 600 of head 110. Thus, a white light source and
an infrared light source may both be off center with respect to centerline 600. In
one embodiment, the white light source and the infrared light source may both be off
center with respect to centerline 600 by the same amount and may both be disposed
upon an arc defined by movement of a bottom end 612 of TIR lens 504, as discussed
in detail below.
[0074] Light source assembly 601 may similarly include other light sources or groups of
light sources. For example, in one embodiment, light source assembly 601 may include
a group of red light sources, a group of green light sources, and/or a group of blue
light sources. Light source assembly 601 may include any desired number of groups
of light sources and each group of light sources may include any desired number and/or
combination of light sources. Accordingly, discussion herein of white light sources
and infrared light sources is by way of example only, and not by way of limitation.
[0075] TIR lens 504 may be generally conical in configuration. TIR lens 504 may have a top
end 611 (e.g., a larger end) that is proximate planar lens 503 and may have a bottom
end 612 (e.g., a smaller end) that is proximate light source assembly 601. Top end
611 and bottom end 612 of TIR lens 504 may be eccentric with respect centerline 600
of head 110. Thus, rotation of head 110 may cause TIR lens 504, and in particular
bottom end 612 of TIR lens 504, to move in an arc. The light sources of light source
assembly 601 may be disposed along this arc such that rotation of TIR lens 504 moves
bottom end 612 thereof from one light source to another light source.
[0076] TIR lens 504, and more particularly bottom end 612 thereof, may be made to be eccentric
or offset with respect to centerline 600 of head 110 by forming a bore 651 of bezel
103 to be eccentric with respect to centerline 600 of head 110. Thus, as bezel 103
is rotated with respect to light source assembly 601, TIR lens 504 moves in an arc,
as described above.
[0077] Bottom end 612 may include a light inlet 602 that is configured to receive light
from light source assembly 601 into TIR lens 504. Bottom end 612, and more particularly
light inlet 602, may move from one light source to another light source as bezel 103
is rotated.
[0078] Thus, rotation of TIR lens 504 may be caused by rotation of bezel 103 to which TIR
lens 504 is attached. Such movement may move inlet 602 from being positioned proximate
one light source of light source assembly 601 to being positioned proximate another
light source of LED assembly 601. Thus, rotation of bezel 103 may be used to select
which light source of light source assembly 601 provides light to TIR lens 504. For
example, when light inlet 602 is positioned proximate a white light source that is
turned on, then white light from the white light source enters TIR lens 504 and lighting
device 100 provides white light. Similarly, when the light inlet 602 is positioned
proximate an infrared light source that is turned on, then infrared light from the
infrared light source enters TIR lens 504 and lighting device 100 provides infrared
light. Thus, TIR lens 504 is movable between light sources and the position of inlet
602 determines from which light source TIR lens 504 receives light.
[0079] Embodiments may be configured to facilitate locking of bezel 103 in a desired position.
For example, bezel 103 may be locked in a position for the desired light, (e.g., white
or infrared) to be provided by lighting device 100. Lock ring 104 may be configured
such that when lock ring 104 is positioned toward the bottom of head 110, then bezel
103 is locked in position and rotation thereof is inhibited. Conversely, lock ring
104 may be configured such that when lock ring 104 is positioned toward the top of
head 110, then bezel 103 is not locked in position, such that rotation thereof is
facilitated. Springs 521-523 may bias lock ring 104 in position toward the bottom
of head 110 such that bezel 103 is locked unless the user moves the lock ring 104
toward the top of the head 110.
[0080] Lock ring 104 may interface with bezel 103 such that bezel 103 may only rotate if
lock ring 104 may rotate. For example, lock ring 104 may interface with bezel 103
via a plurality of splines. When lock ring 104 is moved toward the top of head 110,
then detent 530 may be pulled by lock ring 104 from opening 531 of heat sink 105 within
which detent 530 is seated. When detent 530 is seated within opening 531, bezel 103
is locked in position and rotation is inhibited. When detent 530 is pulled from opening
531, bezel 103 is not locked in position and rotation is facilitated.
[0081] In certain embodiments, lighting device 110 may be configured so as to provide electric
power only to selected light sources. For example, electric power may be provided
only to the light source that provides light to TIR lens 504. Rotation of bezel 103
may determine which light source is provided electric power.
[0082] Fig. 5B illustrates a cross-sectional top view of head 110 of lighting device 100
in accordance with an embodiment of the invention. As shown in Fig. 5B, one or more
Hall effect sensors may cooperate with one or more magnets to sense rotation of bezel
103 and thus to facilitate selection of the desired light source that is to be provided
electrical power and thus illuminated. For example, Hall effect sensors 571 and 572
(which are attached to control PCB 560) may be fixed with respect to heat sink 105.
Magnet 511 (which is attached to bezel 103) rotates with bezel 103. Thus, rotation
of bezel 103 may move magnet 511 from proximate one Hall effect sensor 571 or 572
to proximate the other Hall effect sensor 572 or 571. Each Hall effect sensor 571
and 572 may sense the presence of magnet 511, thus facilitating the use of rotation
of bezel 103 to select which light source receives electric power.
[0083] In various embodiments, any desired combination of control of electrical power and
alignment of TIR lens 504 with a light source may be provided by rotation of bezel
103. Thus, for example, rotation of bezel 103 may both align TIR lens 504 with the
light source that provides the desired output (e.g., white light or infrared light),
and may facilitate the application of electric power to the same light source.
[0084] Figs. 6A-B illustrate relative positions of light inlet 602 and light sources 801
and 802 when bezel 103 is rotated in different positions in accordance with several
embodiments of the invention. In particular, Figs. 6A-B are top views that show schematically
how rotation of TIR lens 504 (such as rotation caused by rotation of bezel 103) facilitates
the selection of one of two different light sources 801 and 802. In Figs. 6A-B, light
source 801 is a white light LED and light source 802 is an infrared LED.
[0085] The eccentricity of TIR lens 504 has been exaggerated in Figs. 6A-B, so as to more
clearly show how such eccentricity facilitates the selection of the desired light
source. As discussed herein, any desired number of such light sources may be selected
from in this manner. For example, two, three, four, or more LEDs may be selected from
in this manner.
[0086] Fig. 6A shows TIR lens 504 after being rotated in the direction of an arrow 810 such
that light inlet 602 thereof is proximate (e.g., above) infrared LED 802. Fig. 6B
shows TIR lens 504 after being rotated in the direction of an arrow 811 which results
in movement of light inlet 602 from the infrared LED 802 to the white light LED 801.
[0087] TIR lens 504 is offset or eccentric with respect to centerline 600 of head 110 such
that the position of TIR lens 504 changes substantially between Figs. 6A and 6B. More
particularly, bottom end 612 and light inlet 602 of TIR lens 504 change positions
substantially between Figs. 6A and 6B. This change in position occurs because TIR
lens 504 is substantially eccentric with respect to centerline 600 and rotates about
centerline 600.
[0088] Fig. 7 illustrates an electrical schematic of lighting device 100 in accordance with
an embodiment of the invention. A microprocessor 830 (labeled CPU) may be provided
on control PCB 560 and powered by one or more batteries 840 (e.g., which may be provided
in cavity 151). Microprocessor 830 may receive input signals (e.g., control signals)
from rotary switches 140 and 142 (each of which is connected to an associated group
of resistors 820 and 822 as shown in Fig. 7) and dome switch 130. Microprocessor 830
may also receive input signals from one or more switches attached to connector 160.
For example, remote switch 106 and/or vertical grip 108 may be implemented as a single
stage remote switch attached to connector 160. Other switches such as a dual stage
remote switch 860, a multiple device remote switch 870 (e.g., a switch that permits
one or more additional secondary devices 880 to be connected therethrough), or other
types of switches may be used. Microprocessor 830 may also receive input signals from
a Hall effect switch 850 implemented, for example, using Hall effect sensors 571 and
572. In response to the various received signals, microprocessor 830 may selectively
operate LEDs 801 and 802 switch on, switch off, operate in a strobe-like manner, and/or
provide various brightness levels.
[0089] Figs. 8A-C illustrate remote switch 106 which may be connected to lighting device
100 in accordance with several embodiments of the invention. In particular, Figs.
8A-B illustrate remote switch 106 when assembled and Fig. 8C illustrates an exploded
view of remote switch 106.
[0090] Remote switch 106 includes a connector body 910 having a protrusion 900 for insertion
into connector 160 of lighting device 100. A top surface 911 of connector body 910
may engage with rail clamp mount 102 to mount remote switch 106 as shown in Figs.
1B-C and 2A-B. Remote switch 106 also includes a housing 912 which may be connected
to connector body 910 by a screw 916. Remote switch 106 also includes a ring terminal
918, screw 920, insulator 922, and socket contact 924.
[0091] Remote switch 106 also includes a rear member 914 which may engage with housing 912.
As shown in Fig. 8B, rear member 914 includes a surface 930 which may be pushed by
the user to operate remote switch 106. Accordingly, the user may provide signals to
microprocessor 830 to operate lighting device 100 in a conveniently manner while lighting
device 100 is positioned remotely from the user (e.g., near a front end of a weapon
or other locations).
[0092] Fig. 9A illustrates a lighting device with an indicator button in an expanded position
in accordance with an embodiment of the invention. Figs. 9B illustrates a cross-sectional
top view of a heat sink of a lighting device with an indicator button in a retracted
position in accordance with an embodiment of the invention. Figs. 9C illustrates a
cross-sectional top view of a heat sink of a lighting device with an indicator button
in an expanded position in accordance with an embodiment of the invention.
[0093] Lighting device 100 may include an indicator button 195 which may be selectively
expanded out from head 110 or retracted into head 110 in response to the user's rotation
of bezel 103 to a particular position. For example, in one embodiment, indicator button
195 may remain in a retracted position (as shown in Figs. 3A-H and Fig. 9B) except
when bezel 103 is rotated such that marker 112 is located next to position 124 at
which time indicator button 195 may transition to an expanded position (as shown in
Figs. 9A and 9C). When marker 112 of bezel 103 rotated away from position 124, then
indicator button 195 may return to the retracted position.
[0094] As shown in Fig. 9B, heat sink 105 includes button 195 which is shown in a retracted
position while bezel 103 is set to the disable position (e.g., when marker 112 is
proximate position 122). Heat sink 105 also includes pin 197 fixed to bezel 103 which
may rotate through a slot 196 as bezel 103 rotates. In particular, pin 197 may rotate
to an end 186 of slot 196 (e.g., when marker 112 is proximate position 124) or to
another end 187 of slot 196 (e.g., when marker 112 is proximate position 126).
[0095] The operation of indicator button 195 may be understood by comparing Figs. 9B and
9C. In particular, indicator button 195 may be spring loaded by spring 199. As pin
197 rotates toward end 186 of slot 196, indicator button 195 is forced out of heat
sink 105 by pin 197. Pin 197 motivates indicator button 195 by way of a groove 198
in indicator button 195. As pin 197 makes contact with groove 198, pin 197 applies
outward force on a surface 188 of indicator button 195 and in turn compresses spring
199 and forces indicator button 195 outward. After lock ring 104 is locked in position
124, indicator button 195 remains locked in an expanded position as shown in Figs.
9A and 9C.
[0096] As lock ring 104 is used to rotate pin 197 away from end 186 of slot 196, spring
199 exerts force on a pin 185 of indicator button 195 to motivate indicator button
195 back into a retracted position within heat sink 105. At this time, pin 197 exerts
force on a surface 189 of indicator button 195 which assists spring 199 in returning
indicator button 195 back to the retracted position.
[0097] In view of the present disclosure, it will be appreciated that various structures
are provided which may be advantageously used in one or more lighting devices 100.
For example, as discussed above, TIR lens 504 may be configured so as to facilitate
selection of which light source provides light for lighting device 100. In addition,
the inclusion of Hall effect sensors 571 and 572 may be used to facilitate the determination
of which light source illuminates during operation of lighting device 100. Thus, TIR
lens 504 may be switched among one or more light sources and electric power may be
switched among one or more light sources. In this manner, the user may readily select
which light source is used by lighting device 100 and consequently what type of light
(e.g., white light, infrared light, ultraviolet light, or other light) is provided
thereby.
[0098] Different types of lenses other than TIR lens 504 may be used. Thus, discussion herein
regarding the use of a TIR lens is by way of example only and not by way of limitation.
Any desired type of lens/reflector may be used. Any desired combination of types of
lenses and/or reflectors may be used. For example, as previously described, one or
more lenses (e.g., one or more substantially flat lenses and/or one or more lenses
of any other desired shape) and/or one or more reflectors (e.g., one or more substantially
parabolic reflectors and/or one or more reflectors of any other desired shape) may
be used.
[0099] An alternative embodiment of a head 1110 for a lighting device in accordance with
the present invention is illustrated in Figs. 10A-15. In various embodiments, head
1110 can be used with appropriate bodies to provide lighting devices. Fig. 12 is a
left side cross-sectional view of the head of Fig. 10A as seen along the lines of
the section 12 - 12 taken in Fig. 10A in accordance with an embodiment of the invention,
and Fig. 13 is a cross-sectional view of the head of Fig. 12 as seen along the lines
of the section 13 - 13 taken therein in accordance with an embodiment of the invention.
[0100] Referring initially to Figs. 10A and 10B, it can be seen that the head 1110 comprises
a main member 1105 (e.g., a generally tubular structure which may operate, for example,
as a heat sink in one embodiment) and a bezel 1103 (e.g., a generally tubular bezel
in one embodiment). The bezel 1103 surrounds at least a portion of the main member
1105. The bezel 1103 and the main member 1105 share a common central axis 1002, and
the bezel 1103 may be selectively rotated relative to the main member 1105 about the
central axis 1002.
[0101] A lens 1504 is disposed in the bezel 1103 for conjoint rotation therewith. As discussed,
in some embodiments, the lens 1504 can comprise a Total Internal Reflection (TIR)
lens having a concentric light inlet 1602 and an optical axis 1004 (see Figs. 11A
and 11B) that is concentric with the light inlet 1602. Alternatively, other lens and/or
reflector types can also be used.
[0102] Lens 1504 is configured to rotate with the bezel 1103. However, as illustrated in
Figs. 11A-B and 12, and in contrast to the several embodiments discussed herein, lens
1504 is asymmetrically disposed in the bezel 1103. The optical axis 1004 and light
inlet 1602 of the lens 1504 are disposed parallel to and offset from the central axis
1002 of the head 1110 such that rotation of the bezel 1103 relative to the main member
1105 causes the light inlet 1602 and optical axis 1004 to rotate through an arc 1003
about the central axis 1002.
[0103] As illustrated in Fig. 10B, this offset, or eccentric, mounting of the lens 1504
can be effected, in one embodiment, using a lens mounting collar 1506 having an internal
bore 1006 that is disposed eccentrically to the outer circumfery 1008 of the collar
1506. In the example embodiment illustrated, the front end of the lens 1504 is inserted
into the eccentric bore 1006 of the collar 1506, and the assembly of the lens 1504
and collar 1506 are then inserted into a support cup 1508 having a correspondingly
eccentric, e.g., offset, internal surface 1510 conforming to the rear surface of the
lens 1504.
[0104] As illustrated in Fig. 10B, in some embodiments, the outer circumfery of the lens
support cup 1508 can be provided with a plurality of resilient castellations 1012
that are configured to be received in a corresponding internal circumferential groove
1014 in the bezel 1103 in a snap-in fashion so as to retain the assembly of the eccentric
collar 1506, lens 1504 and eccentric support cup 1508 in the bezel 1103. Another support
cup 1509 can receive a spring 1507 and also be used to retain and limit compression
of the spring 1507, and thereby axial force on a PCB stack 1560. Concentricity and
alignment from PCB stack 1560 to a light source PCB 1550 may be provided by close
fit to main member 1105 and alignment of associated connecting pins 1551, respectively.
As discussed in connection with some of the other embodiments described above, a flat
gasket 1502 and a planar lens 1503 can be disposed ahead of the lens 1504, and a threaded
lens retainer 1501 can be used to removably secure the entire assembly in the bezel
1103.
[0105] As illustrated in Figs. 10B, 11A and 11B, a number, e.g., two, of light sources 1801
and 1802 can be fixed relative to the main member 1105, e.g., on transversely mounted
light source PCB 1550 located behind the light inlet 1602 of the lens 1504, and at
respective angular positions around the arc 1003 of rotation of the optical axis 1004,
such that rotation of the bezel 1103 about the central axis 1002 to angular positions
respectively corresponding to the angular positions of the light sources 1801 and
1802 disposes the light inlet 1602 and optical axis 1004 of the lens 1504 in axial
alignment with corresponding ones of the light sources 1801 and 1802. As in some of
the embodiments described above, the light sources 1801 and 1802 can comprise LEDs.
For example the light source 1801 can comprise an LED emitting, for example, white
light (e.g., visible light) when illuminated, and the LED 1802 can comprise an LED
emitting, for example, IR or UV light when illuminated.
[0106] Thus, as illustrated in Fig. 11A, when the bezel 1103 is rotated about the central
axis 1002, e.g., in a direction corresponding to arrows 1016, to an angular position
corresponding to that of the light source 1801, the light inlet 1602 and the optical
axis 1004 of the lens 1504 will be disposed in axial alignment with the light source
1801, such that, if the light source 1801 is illuminated, a beam of the light produced
by the light source 1801 will be emitted from the front end of the lens 1504. On the
other hand, when the bezel 1103 is rotated about the central axis 1002 to an angular
position corresponding to that of the light source 1802, the light inlet 1602 and
the optical axis 1004 of the lens 1504 will then be disposed in axial alignment with
the light source 1802, such that, if the light source 1802 is illuminated, a beam
of the light produced by the light source 1802 will be emitted from the front end
of the lens 1504.
[0107] As shown in Figs. 10B and 12, head 1110 may also include an o-ring 1541 disposed
between the main member 1105 and the bezel 1103. O-ring 1541 may contact an interior
surface of the bezel 1103 and provide a bearing surface for the bezel 1103 as the
bezel 1103 rotates about the central axis 1002.
[0108] Head 1110 may include a locking mechanism for releasably locking the bezel 1103 in
selected ones of plurality of angular positions relative to the main member 1105,
and in particular, angular positions corresponding to those of the light sources and/or
to one or more positions corresponding to, for example, an "OFF" state of the head
1110.
[0109] As can be seen in Fig 12, in addition to being rotatably moveable about the main
member 1105, the bezel 1103 can also be disposed for axial movement thereon, e.g.,
in the direction of arrows 1018. The locking mechanism can thus include a resilient
mechanism that both retains the bezel 1103 on the main member 1105 axially (e.g.,
to resist complete removal of the bezel 1103 from the main member 1105), and resiliently
biases the bezel 1103 toward (e.g., rearwardly) the main member 1105.
[0110] In some embodiments, as illustrated in Figs. 10B and 12, this resilient retaining
and biasing mechanism may be implemented as a wave spring 1020 that is commonly retained
in a pair of opposing circumferential channels 1022 and 1024 (e.g., recesses) respectively
disposed in an exterior surface of the main member 1105 and an interior surface of
the bezel 1103. As illustrated in Fig. 10B, the wave spring 1020, may include separate
ends 1026, which permit wave spring 1020 it to be expanded and contracted radially
in relation to central axis 1002, and may also include alternating axial corrugations
1028 which permit wave spring 1020 to resiliently expand and contract parallel to
central axis 1002 (e.g., in the direction of arrows 1018).
[0111] In an example method for assembling the bezel 1103 to the main member 1105, the split
wave spring 1020 may be inserted into the "inner" circumferential channel 1022 of
the main member 1105 and contracted radially until its outer circumfery is disposed
substantially flush with or below the exterior surface of the main member 1105. The
bezel 1103 is then slid over the main member 1105 until the "outer" circumferential
channel 1024 of the bezel 1103 is disposed in opposition to the circumferential channel
1022 of the main member 1105. The wave spring 1020 is then permitted to expand radially
into the outer circumferential channel 1024 of the bezel 1103, such that it then occupies
both channels 1022 and 1024, with its alternating corrugations 1028 respectively disposed
in abutment with the respective front and rear walls of the two circumferential channels
1022 and 1024. As those of some skill will understand, the foregoing method can be
modified by first inserting the wave spring 1020 into the outer circumferential channel
1024 of the bezel 1103 and then expanding it radially therein.
[0112] In either case, after the bezel 1103 has been assembled with the main member 1105
using the wave spring 1020 as illustrated in Fig. 12, the split wave spring 1020 operates
both to retain the bezel 1103 on the main member 1105 axially and to resiliently bias
the bezel 1103 downwardly (e.g., rearwardly) toward the main member 1105 when compressed.
That is, a user's grasping of the bezel 1103 and urging it axially upwardly (e.g.,
forwardly) away from the main member 1105 acts to expand the wave spring 1020 in the
axial direction such that, if the bezel 1103 is then released, the compressive force
in the spring 1020 will then urge the bezel 1103 back toward the main member 1105.
This rearward axial biasing force can be used advantageously in the releasable locking
mechanism as further described herein.
[0113] In addition, as bezel 1103 is urged axially upwardly away from the main member 1105,
wave spring 1020 may continue to protrude into circumferential channel 1024 of bezel
1103 and also into circumferential channel 1022 of main member 1105. If bezel 1103
is further urged, wave spring 1020 will become abutted against one or more bottom
walls 1025 of circumferential channel 1024 and one or more top walls 1027 of circumferential
channel 1022. As a result, this will cause wave spring 1020 to impede further upward
axial movement of bezel 1103 relative to main member 1105.
[0114] As illustrated in Fig. 13, the locking mechanism may include one or more pins 1030
protruding radially from the main member 1105 (e.g., inserted into corresponding recesses
1031 in main member 1105) and acting in cooperation with one or more corresponding
radial slots 1032 extending into the rear end of the bezel 1103. When the bezel 1103
is positioned rearwardly against the main member 1105 (e.g., in the position illustrated
in Fig. 12), the pins 1030 and the slots 1032 lie in a common transverse plane, as
illustrated in Fig. 13, and can be arranged therein at respective angular positions
about the central axis 1002 such that, at selected angular positions of the bezel
1103 relative to the main member 1105, the one or more pins 1030 are releasably engaged
in corresponding ones of the slots 1032 (e.g., the slots 1032 may receive the pins
1030 as the bezel 1103 moves rearwardly toward the main member 1105) so as to prevent
rotation of the bezel 1103 relative to the main member 1105.
[0115] In the particular example embodiment illustrated in Fig. 13, one pair of radially
protruding pins 1030 is disposed on the main member 1105, spaced about 180 degrees
apart, and three pairs of corresponding slots 1032 in the bezel 1103, the slots 1032
of each pair being spaced about 180 degrees apart, the pairs being spaced about 60
degrees apart. However, it should be understood that other numbers and arrangements
of pins 1030 and slots 1032 may be used in other embodiments as desired.
[0116] An example method for releasably locking the bezel 1103 at a selected angular position
relative to the main member 1105 using the example locking mechanism described above
may include a user grasping the bezel 1103, and then urging it axially forward relative
to (e.g., away from) the main member 1105 and against the axial bias of the wave spring
1020. The urging causes the pins 1030 to disengage from the slots 1032. The user may
then rotate the bezel 1103 relative to the heat sink 1103 until at least one of the
slots 1032 is axially aligned with at least one of the pins 1030, then release the
bezel 1103 such that the bias of the wave spring 1020 urges the bezel 1103 toward
the main member 1105, and hence, the at least one slot 1032 into axial engagement
with the at least one pin 1030. Such operations may be repeated as desired to move
the bezel 1103 between various selected angular positions.
[0117] During its rotation, the bezel 1103 rotates concentrically with the central axis
1002 while the light inlet 1602 and optical axis 1004 of the lens 1504 to rotate through
an arc 1003 about the central axis 1002. Also, after at least a partial rotation has
been performed, slots 1032 may no longer be aligned with pins 1030. As a result, unslotted
portions of the bottom of the bezel 1103 may rest on pins 1030 while being biased
downward toward the pins 1030 by wave spring 1020 as the rotation continues, thus
reducing the need for a user to continue applying axial urging force until the next
one of the slots 1032 is aligned with at least one of the pins 1030.
[0118] Head 1110 may include a switching mechanism used to control the operation of respective
ones of light sources 1081 and 1082 when the light inlet 1602 and optical axis 1004
of the lens 1504 are disposed in axial alignment therewith.
[0119] Referring now to Figs. 12 and 13, such a switching mechanism may include a circumferential
groove 1034 disposed in an exterior surface of the main member 1105, and a magnet
1511, e.g., a permanent magnet in one embodiment, fixed relative to (e.g., coupled
to and/or otherwise positioned) an interior surface 1036 of the bezel 1103 and arranged
to move (e.g., slide) circumferentially within the circumferential groove 1034 of
the main member 1105 as the bezel 1103 is rotated relative thereto. Circumferential
groove 1034 includes ends 1035 which may receive magnet 1511 and define a rotation
range of the bezel 1103 relative to the main member 1105. In this regard, as the magnet
1511 slides to each of ends 1035, the bezel 1103 may be prevented from further rotation
due to the fixed relationship between the magnet 1511 and the bezel 1103 (e.g., contact
between the magnet 1511 and the ends 1035 may physically prevent further rotation
of the bezel 1103). In some embodiments, the rotation range of the bezel 1103 may
be less than a full circumference of the main member 1105 (e.g., approximately 135
degrees in one embodiment).
[0120] As discussed herein with regard to Figs. 11A and 11B, a plurality of light sources,
e.g., light sources 1801 and 1082, can be coupled to the main member 1105, e.g., via
a light source PCB 1550, and disposed at first and second angular positions about
the central axis 1002. As illustrated in Fig. 13, a pair of sensors 1571 (e.g., Hall
effect sensors as described herein), can be fixed relative to (e.g., coupled to and/or
otherwise positioned) the main member 1105 and respectively disposed at third and
fourth angular positions about the central axis 1002. Each of the sensors 1571 can
be made operable to detect the proximity of the magnet 1511 and to provide one or
more control signals to selectively switch respective ones of the light sources 1801
and 1802 based on the detected proximity. In one embodiment, sensors 1571 may detect
the magnet 1511 within approximately 30 degrees of angular rotation. In one embodiment,
sensors 1571 may detect magnet 1511 regardless of the polarity orientation of magnet
1511.
[0121] If the sensors 1571 are positioned at angular positions respectively corresponding
to those of the light sources 1801 and 1802, rotation of the bezel 1103 about the
central axis 1002 and to an angular position corresponding to that of one of the light
sources 1801 or 1802 can operate both to dispose the light inlet 1602 and optical
axis 1004 of the lens 1504 in axial alignment with the corresponding light source
1801 or 1802, and to dispose the magnet 1511 at the predetermined distance from the
corresponding sensor 1571, thereby causing the corresponding light source 1801 or
1802 to illuminate through operation of appropriate control signals.
[0122] Thus, as illustrated in the particular example embodiment of Fig. 13, the angular
position of the bezel 1103 relative to the main member 1105 can be such that the magnet
1511 is disposed immediately adjacent to a first one of the two sensors 1571, thereby
disposing the light inlet 1602 and optical axis 1004 of the lens 1504 in axial alignment
with a corresponding light source 1802, as illustrated in Fig. 11B, and causing the
corresponding light source 1802 to be illuminated.
[0123] Then, a rotation of the bezel 1103 relative to the main member 1105 to a second angular
position corresponding to those of the other light source 1801 and sensor 1571 causes
the magnet 1511 to be disposed immediately adjacent to the other sensor 1571, thereby
turning off the first light source 1802, disposing the light inlet 1602 and optical
axis 1004 of the lens 1504 in axial alignment with the other light source 1801, as
illustrated in Fig. 11A, and causing the other light source 1801 to be illuminated.
[0124] As discussed above, a relative angular position of the bezel 1103 between or on either
side of the two light sources 1801 and 1802 and their corresponding sensors 1571 can
correspond to an OFF condition of the head 1110, and the number of light sources 1801
and 1802 and corresponding sensors that can be used in the device can differ from
the two illustrated in the example embodiment of the figures.
[0125] Head 1110 and various other heads in accordance with the present disclosure may be
used to implement any desired type of lighting device. In various embodiments, head
1110 may be attached to a body (e.g., any of the various bodies described herein or
others as appropriate) to provide a lighting device suitable for mounted use, handheld
use, portable applications, fixed applications, and/or others as appropriate.
[0126] For example, Fig. 14 is an upper front perspective view of a lighting device 1400
including a head 1410 providing similar features to that of head 1110 of Fig. 10A
and further including a body 1412 useful for coupling the lighting device 1400 to
a pistol in accordance with an embodiment of the invention. In one embodiment, head
1410 may include a bezel 1403 that is further elongated than bezel 1103, and a main
member 1405 (e.g., a heat sink in one embodiment) that is shorter than main member
1105 and includes external threads to screw into complementary internal threads of
body 1412 (e.g., main member 1405 may be threaded into body 1412).
[0127] Fig. 15 is an upper front perspective view of a lighting device 1500 including the
head 1110 and further including a body 1512 useful for coupling the lighting device
1500 to a rifle in accordance with an embodiment of the invention. In one embodiment,
main member 1105 includes internal threads 1112 (see Fig. 12) that may be used to
screw onto complementary external threads of body 1512 (e.g., main member 1105 may
be threaded onto body 1512).
[0128] Such lighting devices 1400, 1500, and others described herein may be mounted and/or
otherwise attached to firearms or other attachment locations using, for example, rails,
clamps, intermediate attachment members, and/or other mechanisms provided separate
from and/or integrated with the bodies of the lighting devices.
[0129] Although particular switches have been described, one or more other types of controls
and/or switches may be used where appropriate.
[0130] The discussion of particular light sources herein is by way of example only and not
by way of limitation. Any desired number and wavelengths of light sources may be used
(e.g., white light sources, visible light sources, infrared light sources, ultraviolet
light sources, or other light sources). Such light sources may be grouped in any desired
manner. For example, one group may include only white light sources that cooperate
to provide white light when white light is selected and another group may include
only infrared light sources that cooperate to provide infrared light when infrared
light is selected.
[0131] Embodiments are not limited to the use of LEDs as light sources. Light sources other
than LEDs may be used. For example, light sources such as LEDs, arc lamps, tungsten
lamps, or any other type of light sources may be used. Thus, discussion herein regarding
the use of LEDs is by way of example only and not by way of limitation. Embodiments
may include any desired light sources or combination of light sources.
[0132] Embodiments are not limited to use in weapon mounted lighting devices. Discussion
herein of weapon mounting is by way of example only and not by way of limitation.
Embodiments may be configured for use with flashlights, weapon (such as rifles and
pistols) mounted lights, helmet mounted lights, headlamps, and vehicle lights. Indeed,
embodiments may be used with any desired device. Thus, embodiments may provide light
source switching for a variety of different applications. For example, the lighting
device described herein may be configured to mount to a flashlight, a rifle or pistol,
a helmet, a vehicle, or any other item. The lighting device may mount to such items
via threads, mounts, adapters, or other appropriate ways.
[0133] The disclosure is not intended to limit the present invention to the precise forms
or particular fields of use disclosed. It is contemplated that various alternate embodiments
and/or modifications to the present invention, whether explicitly described or implied
herein, are possible in light of the disclosure. For example, it is contemplated that
the various embodiments set forth herein may be combined together and/or separated
into additional embodiments where appropriate.
[0134] Embodiments described above illustrate but do not limit the invention. It should
also be understood that numerous modifications and variations are possible in accordance
with the principles of the present invention. Accordingly, the scope of the invention
is defined only by the following claims.