FIELD OF THE INVENTION
The present invention relates to portable lights and, more particularly, to lights with pivotable light heads.
SUMMARY
In one embodiment, the invention provides a portable light including a body having a first end and a second end. The body defines a longitudinal axis extending through the first end and the second end. The body is configured to receive a battery. The portable light also includes a light head pivotably coupled to the first end of the body, and a first light source supported by the light head. The first light source includes a spot light emitting diode configured to emit light in a direction substantially parallel to the longitudinal axis. The portable light further includes a second light source supported by the light head. The second light source includes a flood light emitting diode configured to emit light in the direction substantially parallel to the longitudinal axis. The portable light also includes an actuator supported by the body. The actuator is operable to selectively turn on the first light source and the second light source.
In another embodiment, the invention provides a portable light including a body having a first end and a second end. The body defines a longitudinal axis extending through the first end and the second end. The body is configured to receive a battery. The portable light also includes a light head pivotably coupled to the first end of the body. The light head has a heat sink formed of a metallic material. The heat sink defines an outer surface of the light head. The portable light further includes one or more light emitting diodes coupled to the light head, and a lens coupled to the light head and operable to diffuse light emitted from the one or more light emitting diodes.
In yet another embodiment, the invention provides a portable light including a body having a first end and a second end. The body defines a longitudinal axis extending through the first end and the second end. The body is configured to receive a battery. The portable light also includes a light head pivotably coupled to the first end of the body, a first light source including a first light emitting diode, a second light source including a second light emitting diode, and a lens coupled to the light head. The lens includes a first section aligned with the first light source and a second section aligned with the second light source. The second section has a different configuration than the first section. The first section and the second section are integrally formed.
Other aspects of the invention will become apparent by consideration of the detailed description and accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of a portable light.
FIG. 2 is another perspective view of the portable light of FIG. 1.
FIG. 3A is a side view of the portable light of FIG. 1 in an in-line position.
FIG. 3B is a side view of the portable light of FIG. 1 in a partially extended position.
FIG. 3C is a side view of the portable light of FIG. 1 in a full extended position.
FIG. 4 is a front view of the portable light of FIG. 1.
FIG. 5 is a cross-sectional view of the portable light of FIG. 1
DETAILED DESCRIPTION
Before any embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways.
FIGS. 1-5 illustrate a portable light 10 according to one embodiment of the invention. The illustrated light 10 includes a light head 14 and a body 18. The body 18 is configured to be grasped and held by a user. The light head 14 is moveable (e.g., pivotable) relative to the body 18 to change the direction in which light is emitted from the portable light 10.
The illustrated body 18 is generally cylindrical and includes a first end 18a and a second end 18b. The body 18 also defines a central longitudinal axis 20 (FIG. 5) extending through the first and second ends 18a, 18b. The body 18 further includes a boss 22 formed at the first end 18a of the body 18. The boss 22 is offset from the central longitudinal axis 20 and coupled to the light head 14. In the illustrated embodiment, the boss 22 includes a fastener 26 (e.g., a screw) to secure the light head 14 to the body 18. The fastener 26 defines a pivot axis 28 (FIG. 4) about which the light head 14 can pivot relative to the body 18. The illustrated pivot axis 28 is perpendicular to the central longitudinal axis 20 of the body 18. As further described below, the light head 14 is pivotable relative to the body 18 between a first or inline position (FIG. 3A), a second or partially-extended position (FIG. 3B), and a third or fully extended position (FIG. 3C). In some embodiments, the fastener 26 can be further tightened to temporarily retain the light head 14 in different positions relative to the body 18.
The light head 14 includes a lens 30, a plurality of light sources 34, 38 (FIG. 5), and a heat sink 46. The lens 30 covers the light sources 34, 38 to protect the light sources 34, 38 and diffuse light emitted from the light sources 34, 38 to the surrounding area. As shown in FIGS. 2 and 4, the illustrated lens 30 includes a first lens section 42a aligned with the first light source 34, and a second lens section 42b aligned with the second light source 38. The first lens section 42a is contoured to diffuse light from the first light source 34. The second lens section 42b includes a plurality of total internal reflection (TIR) lenses. In the illustrated embodiment, the first and second lens sections 42a, 42b are integrally formed as a single lens. In other embodiments, the first and second lens sections 42a, 42b may be formed as separate lenses.
As shown in FIG. 5, the light sources 34, 38 are positioned behind the lens 30. The first light source 34 is different than the second light source 38. In the illustrated embodiment, the light sources 34, 38 include light emitting diodes (LEDs). In particular, the first light source 34 includes a single spot LED, while the second light source 38 includes at least one flood LED. In other embodiments, the first light source 34 and/or the second light source 38 may include one or more LEDs. In further embodiments, the light head 14 may include other suitable light sources.
As shown in FIG. 5, the heat sink 46 forms an outer housing of the light head 14. The heat sink 46 thereby supports the other components of the light head 14, such as the light sources 34, 38 and the lens 30. As such, the entire light head 14 may be considered the heat sink 46 that diffuses any excessive or unwanted heat from the light sources 34, 38. In the illustrated embodiment the heat sink 46 is formed as a single, monolithic part. The heat sink 46 also defines an outer surface 24 of the light head 14. However, in alternative embodiments, the heat sink 46 may define alternative portions or surfaces of the light head 14. The heat sink 46 is formed of a metallic material (e.g., aluminum, etc.). However, in alternative embodiments, the heat sink 46 may be composed of alternative materials. In the illustrated embodiment, a plurality of fins 52 (FIG. 1) is formed in the other surface 24 of the heat sink 46. The illustrated fins 52 are located adjacent the first end 18a of the body and increase the surface area of the heat sink 46 to dissipate heat away from the light head 14.
Referring back to FIG. 1, the light sources 34, 38 are controlled via a control panel 50. The illustrated control panel 50 is positioned adjacent the first end 18a of the body 18. The control panel 50 includes one or more actuators electrically connected to the light sources 34, 38 to control operation of the light 10. In the illustrated embodiment, the control panel 50 includes a power actuator 54 to turn the light sources 34, 38 on and off. The illustrated control panel 50 also includes a mode actuator 58 to change an operating mode of the light 10. For example, the mode actuator 58 can cycle through a spot mode in which only the first light source 34 is turned on, and a flood mode in which only the second light source 38 is turned on. More specifically, the mode actuator 58 is additionally capable of cycling through a high flood mode in which the second light source 38 is capable of emitting light at a high intensity, and a low flood mode in which the second light source 38 is capable of emitting light at a low intensity. In alternative embodiments, the light 10 may be operable in an additional mode in which both light sources 34, 38 are turned on. In still further embodiments, the mode actuator 58 may change the first light source 34 (e.g., the spot LED) between operating in a high mode and a low mode. In the illustrated embodiment, the actuators 54, 48 are buttons, but may alternatively be switches, dials or other suitable control mechanisms.
When operating in the spot mode, the light 10 may have a maximum output of at least 500 lumens. When operating in the high flood mode, the light 10 may have a maximum output of at least 400 lumens. When operating in the low flood mode, the light 10 may have a maximum output of at least 100 lumens.
With continued reference to FIG. 1, the body 18 includes a battery housing 62 formed between the first end 18a and the second end 18b. The battery housing 62 is configured to house a power source 66 (FIG. 5), such as a battery. In the illustrated embodiment, the power source 66 is insertable into and removable from the battery housing 62 along an insertion axis that is coaxial with the central longitudinal axis 20 of the body 18. In some embodiments, the power source 66 may have a Li-ion chemistry such that the power source 66 is also relatively lightweight (e.g., about 2 ounces or 55 grams). In other embodiments, the battery 66 may have other chemistries, such as an alkaline chemistry.
The power source 66 is insertable into and removable from the battery housing 62 via a battery cap 72. The battery cap 72 is removably coupled to the second end 18b of the body 18. When connected to the body 18, the battery cap 72 inhibits dirt and other debris from entering the battery housing 62. The battery cap 72 also helps retain the power source 66 within the battery housing 62, but is also removable from the body 18 to facilitate recharging or replacement of the power source 66. The illustrated battery cap 72 includes one or more magnets 70 (FIG. 5) such that the light 10 can be supported and retained on a metal surface.
The power source 66 is sufficient to operate the light sources 34, 38 for extended periods of time. For example, the power source 66 can operate the first light source 34 (e.g., the spot LED) in the high mode for at least 2.5 hours. In addition, the power source 66 can operate the second light source 38 (e.g., the flood LED) in the high flood mode for at least 3 hours. Furthermore, the power source 66 can operate the second light source 38 in the low flood mode for at least 10 hours.
During use, the power source 66 may become depleted. As the power source 66 loses energy, both the first light source 34 (when operating in the high mode) and the second light source 38 may decrease in intensity to conserve power. For example, the light sources 34, 38 may gradually decrease intensity to less than 300 lumens over time. In some embodiments, the light sources 34, 38 may decrease to 292 lumens and maintain this intensity until the power source 66 is completely depleted.
As shown in FIG. 5, the light 10 also includes an internal control unit 78, such as a microcontroller or memory unit, for storing information and executable functions associated with the light 10. The internal control unit 78 is positioned within the body 18 and electrically coupled to the power source 66, the control panel 50, and the light sources 34, 38. The internal control unit 78 is configured to store the state of the light 10 as set by the mode actuator 58 when the light 10 is powered ON and OFF by the power actuator 54. This results in a light 10 that may be turned ON and OFF while maintaining the most recent state of the light 10 (e.g., the mode of the light 10, the light sources 34, 38 in use, etc.), thereby allowing the user to turn the light 10 on with the last setting without having to readjust the mode of the light 10. In some embodiments, the light sources 34, 38 may cycle on and off and through the modes (e.g., spot/high, spot/low, flood) by repeatedly pressing the mode actuator 58.
As shown in FIGS. 2 and 3A-3C, the light 10 also includes a clip 94 coupled to the body 18. The illustrated clip 94 extends substantially parallel to the central longitudinal axis 20 of the body 18. The clip 94 allows the light 10 to be hung or clipped to another object (e.g., a belt loop, etc.) and allows the light 10 to be portable. In the illustrated embodiment, the clip 94 is removable from the body 18 by a C-shaped clamp 96. In other embodiments, the clip 94 may be permanently coupled to the body 18.
The light 10 further includes a charging port 98 supported on the body 18. The charging port 98 is electrically coupled to the power source 66 in the battery housing 62. The charging port 98 allows the power source 66 to be recharged while in the battery housing 62. In the illustrated embodiment, the charging port 98 is positioned on a side of the body 18 adjacent the control panel 50. In other embodiments, the charging port 98 may be positioned elsewhere on the body 18 or on the battery cap 62. The illustrated charging port 98 includes a USB port, although other suitable charging ports may also or alternatively be included on the light 10.
During use, the light head 14 is movable relative to the body 18 to change the orientation at which light is emitted from the light sources 34, 38. More particularly, the light head 14 is pivotable relative to the body 18 about the pivot axis 28 (FIG. 4). In the illustrated embodiment, the light head 14 is pivotable up to 110 degrees, allowing a user to redirect the lens 30 and the light sources 34, 38 from approximately 0 degrees (e.g., FIG. 3A) to approximately 110 degrees (e.g., FIG. 3C). For example, the light head 14 is pivotable between the inline position (e.g., FIG. 3A) and multiple angled positions (e.g., FIGS. 3B-3C). When in the inline position, the light sources 34, 38 emit light from the light head 14 in a direction generally parallel to the central longitudinal axis 20 of the body 18. When in any of the angled positions, the light sources 34, 38 emit light from the light head 14 in directions that are angled (i.e., not parallel to) the central longitudinal axis 20 of the body 18. When the light head 14 is fully pivoted relative to the body, the lens 30 and the light sources 30, 34 are angled approximately 110 degrees relative to the central longitudinal axis 20.
As shown in FIG. 3A, when in the inline position, the light 10 has an overall length L (measured between the lens 30 of the light head 30 and the battery cap 62 in a direction parallel to the central longitudinal axis 20) between 6 and 7 inches. More particularly, the overall length L is about 6.13 inches. As shown in FIG. 4, the light 10 has an overall diameter D (measured across the lens 30 in a direction normal to the central longitudinal axis) between 1 and 2 inches. More particularly, the overall diameter D is about 1.34 inches. With the power source 66 included, the light 10 has an overall weight of between 6 and 7 ounces. More particularly, the overall weight is about 6.67 ounces (190 grams). Without the power source 66, the light 10 has a weight of between 4 and 5 ounces. More particularly, the weight is about 4.75 ounces (135 grams).
In some embodiment, the portable light 10 has a ratio of maximum light output (in lumens) to overall weight (in ounces) of between 70 and 85. In the illustrated embodiment, the ratio is about 76. In some embodiments, the portable light 10 has a ratio of maximum light output (in lumens) to overall volume (in square inches) of between 10 and 30. In the illustrated embodiment, the ratio is about 19.
Although the invention has been described in detail with reference to certain preferred embodiments, variations and modifications exist within the scope and spirit of one or more independent aspects of the invention as described. Various features and advantages of the invention art set forth in the following claims.
Patent Application
20190331306
