LED downlight capable of regulating illumination Angle

A LED downlight capable of regulating illumination angle is composed of a light source device, a swing component, a light distribution mechanism, a rotation component, a casing component and a power source device. The swing component is disposed at a bottom surface of the light source device. The light distribution mechanism is disposed at the bottom surface of the light source device. The rotation component is coupled to the swing component. The casing component is located at a bottom of the swing component. The power source device is disposed at a periphery and connected by a wire to supply power to the light source device. The rotation component can be operated to perform horizontal rotation, and the swing component can be operated to carry out vertical swing during usage so that a user selects and regulates required beam projection direction and angle to have powerful practicality in illumination.

BACKGROUND OF THE INVENTION

Field of the Invention

The present invention relates to a light emitting diode (LED) downlight, and more particularly to a LED downlight capable of horizontal rotation and vertical swing in bidirectional rotation so as to regulate an illuminating angle.

Description of the Related Art

A LED downlight is a common and extensively used illuminating lamp. A conventional LED downlight has a configuration for downwardly illuminating without a bidirectional rotation function capable of horizontally rotating and vertically swinging. Therefore, the illuminating angle of the LED downlight is unable to be regulated during usage. For people who need to frequently regulate an illuminating angle, the conventional LED downlight is inconvenient and requires improvements.

SUMMARY OF THE INVENTION

In view of the aforementioned drawbacks of the prior art, the inventor of the invention conducted research and experiments, and developed a LED downlight capable of regulating an illumination angle in accordance with the invention to overcome the drawbacks of the prior art.

Therefore, it is a primary objective of the invention to provide a LED downlight that conveniently regulates a required beam projection direction and angle by operating horizontal rotation and vertical swing as bidirectional rotation.

To achieve the above mentioned object, the invention relates to a LED downlight capable of regulating an illumination angle composed of at least a light source device, a swing component, a light distribution mechanism, a rotation component, a casing component and a power source device. The light source device includes a heat sink, an LED light source and a support rack, the heat sink composed of a central solid body outwardly arranged to show heat dissipation slices of scattered arrangement, the LED light source supported by the support rack and coupled to a bottom surface of the heat sink, and a center of the support rack opened with a large piercing hole provided for the LED light source to downwardly project a LED beam.

The swing component includes an upper sliding vane and a lower guide flake, with the upper sliding vane having a main slice body having two sets of opposite sides, having a curvature-like shape and a large center hole at its center and disposed with a set of through holes on one set of two opposite side edges and raised with a coupling grip at the other set of opposite side edges The lower guide flake includes a main sheet body having two sets of opposite sides, having a curvature-like shape and a large slot, the curvature of the main sheet body of the lower guide flake corresponding to the curvature of the main slice body of the upper sliding vane, the main sheet body of the lower guide flake respectively disposed with a narrow guide slot on two opposite side edges and downwardly bent at the other set of opposite side edges to form a support sheet body, a bottom of the support sheet body further bent to form a coupling sheet body. The upper sliding vane is placed on the lower guide flake so that the through holes on the two side edges of the upper sliding vane respectively align with the narrow guide slots on the two side edges of the lower guide flake, with a regulation screw member passing through a lower gasket, an elastic member and an upper gasket and locked with a nut after passing through the narrow guide slot of the lower guide flake and the through hole of the upper sliding vane, the nut pushed to downwardly prop the main slice body of the upper sliding vane to attach the main sheet body of the lower guide flake through effect of elastic force of the elastic member.

The light distribution mechanism includes at least one fastening cylinder and a light distribution member, and wherein a top portion and a bottom portion of the fastening cylinder opened to inwardly form an accommodation space, the fastening cylinder remaining a shield wall at bottom periphery, a wall body of the top portion of the fastening cylinder opened with a plurality of slots, the light distribution member accommodated in the accommodation space of the fastening cylinder to be supported by the shield wall, and the slot of the fastening cylinder further snapped with a bottom surface of the heat sink. The light distribution mechanism and a combination body of the LED light source and the support rack vertically pass through the large center hole and the large slot of the swing component to allow the bottom surface of the heat sink to be in contact with the coupling grip of the upper sliding vane. A coupling member further passes through the coupling grip to couple the bottom surface of the heat sink.

The rotation component includes at least an upper rotation ring and an upper fastening ring. The upper rotation ring is a ring-like body opened with a large piercing hole at its center and disposed with at least two sets of coupling holes synchronously disposed near an inner edge. The upper fastening ring is a ring body having a large piercing hole at its center, the ring body further divided into an external ring wall and an inner ring wall, the inner ring wall being higher than the external ring wall. The rotation component is incorporated with a support rack mechanism, the support rack mechanism having a plate body, the plate body opened with a large mounting hole. The upper rotation ring is placed on the plate body of the support rack mechanism, the large piercing hole of the upper rotation ring aligning the large mounting hole of the plate body to cover the inner ring wall of the upper fastening ring on the upper rotation ring, after the external ring wall of the upper fastening ring attaching the plate body, a coupling member coupling the plate body by passing through the external ring body of the upper fastening ring; a connecting sheet body of the lower guide flake in the swing component attached on the upper rotation ring, a coupling member passing through the connecting sheet body to couple the upper rotation ring.

The casing component has a reflective mask, the reflective mask having a narrow upper portion and a wide lower portion and formed with a wall at a bottom edge of an external surface and having a cone-like light hole, which is vertically penetrated and shows the narrow upper portion and the wide lower portion, at its center, the light hole further comprising an inclined-like side hole disposed toward a side except a top surface portion, an external surface of the reflective mask having at least two coupling walls synchronously disposed; the reflective mask accommodated in the large mounting hole of the plate body of the support rack mechanism.

The power source device is further disposed on the plate body of the support rack mechanism and introduced by receiving supply mains to perform circuit finishing work of regulator rectification therein, thereby transmitting and driving the LED light source to emit light.

According to the above-mentioned LED downlight capable of regulating illumination angle, the light distribution member is a lens or a reflective cup.

According to the above mentioned LED downlight capable of regulating illumination angle, the light distribution mechanism includes a lens, with the lens accommodated in the accommodation space of the fastening cylinder to be supported by the wall during assembling, and the light distribution member being further accommodated in the accommodation space to be supported by the lens.

According to the above-mentioned LED downlight capable of regulating illumination angle, the rotation component further includes a lower rotation ring, a center of the lower rotation ring having a large piercing hole, three arc strip grooves uniformly surrounding the ring body, the lower rotation ring being attached to a bottom surface of the plate body during assembling, the large piercing hole of the lower rotation ring aligning the large mounting hole of the plate body, and a coupling member coupled to the plate body after passing through the arc strip groove of the lower rotation ring.

According to the above-mentioned LED downlight capable of regulating illumination angle, the casing component includes a coupling frame, the coupling frame coupled to a bottom surface of the large piercing hole of the lower rotation ring, a clamping member being snapped at a periphery bottom edge of the coupling ring, and the reflective mask is accommodated from a bottom edge of the coupling ring until the coupling wall of the reflective mask crosses over the clamping member of the coupling frame.

According to the above-mentioned LED downlight capable of regulating illumination angle, the casing member includes a decoration frame having a planar decoration tray while a standing wall raises from its middle, the upper rotation ring is downwardly disposed with a vertical wall at a periphery of the large piercing hole to push the standing wall of the decoration ring into the vertical wall of the lower rotation ring, and the reflective mask is accommodated from a bottom edge of the decoration frame until the coupling wall of the reflective mask crosses over the standing wall of the decoration frame.

According to the above-mentioned LED downlight capable of regulating illumination angle, the casing member includes a coupling frame, and wherein the coupling frame being directly attached to a bottom surface of the large mounting hole of the plate body, a clamping member being snapped at a periphery bottom edge of the coupling frame, and the reflective mask being accommodated from a bottom edge of the coupling frame until the coupling wall of the reflective mask crosses over the clamping member of the coupling frame.

According to the above-mentioned LED downlight capable of regulating an illumination angle, the casing component includes a decoration frame having a planar decoration tray while a standing wall raises from its middle, the coupling frame is first attached and coupled to a bottom surface of the large mounting hole of the plate body, the standing wall of the decoration ring is pushed into the coupling fame, and the reflective mask accommodated from a bottom edge of the decoration frame until the coupling wall of the reflective mask crosses over the standing wall of the decoration frame.

According to the above-mentioned LED downlight capable of regulating an illumination angle, at least three sets of downwardly-protruding bottom flanges are disposed on a wall body of the upper rotation ring.

According to the above-mentioned LED downlight capable of regulating illumination angle, an upwardly protruding positioning bump is disposed on the wall body of the upper rotation ring, and a position limiting bump is disposed at an inner edge of the inner ring wall of the upper fastening ring, and wherein the positioning bump is limited by the position limiting bump while rotating the upper rotation ring so that it merely being rotated in one direction and then reversely rotated.

According to the above-mentioned LED downlight capable of regulating illumination angle, a packing member is screwed on the wall body of the upper rotation ring to position the upper rotation ring through packing effect.

According to the above-mentioned LED downlight capable of regulating illumination angle, an insulation case covers the plate body of the support rack mechanism to cover a portion of the downlight above the plate body so that the insulation case is in contact with a fireproof foam, thereby increasing a fireproof effect.

According to the LED downlight capable of regulating illumination angle, the power source device includes a junction box and a driver, the junction box supplied by supply mains to conduct power to the driver, and the driver performing circuit finishing work of regulator rectification therein, thereby transmitting power and driving the LED light source to emit light.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The technical characteristics, contents, advantages and effects of the present invention will be apparent with the detailed description of a preferred embodiment accompanied with related drawings as follows.

With reference toFIG. 1for a downlight10according to an embodiment of the invention, and more particularly to an LED downlight that regulates a beam projection angle by operating horizontal rotation and vertical swing as a bidirectional rotation function. The downlight10is composed of a light source device1, a swing component2, a light distribution mechanism3, a rotation component4, a casing component5and a power source device6.

With reference toFIGS. 2-5, the light source device1is composed of a heat sink11, an LED light source12and a support rack13. The heat sink11is composed of a central solid body111outwardly arranged to show heat dissipation slices of scattered arrangement. The foregoing whole can be, but is not limited to, a cylinder-shape or approximately square column. The heat sink11is disposed with a plurality of vertically external coupling hole columns112near an external ring, its top surface and bottom surface formed into coupling holes while a plurality of internal coupling hole columns113is simultaneously disposed near an inner ring, its top surface and a bottom surface also formed into coupling holes, with bottom coupling holes of several internal coupling hole columns113are locked with coupling members in advance so that they are coupled with a fastening cylinder31of the light distribution mechanism3. The heat sink11further includes a ring piece114passed by a plurality of coupling members (screw bolts for example) to lock the coupling hole of the top surface of the external coupling hole columns112such that the ring piece114is disposed at a top surface external ring of the heat sink11to retain the heat sink11. The LED light source12downwardly projects LED beam. A large piercing hole131is opened at the center of the support rack13, its periphery designed as micro-recess and having several piercing holes132. The LED light source12is supported by the micro-recess of the support rack13. Moreover, several coupling members133(for example: screw bolts) are utilized to correspondingly lock the coupling hole on the bottom surface of the coupling hole columns113pre-set on the inner ring of the heat sink11after passing through the piercing hole132of the support rack13so that the LED light source12stays at the bottom surface of the central solid body111of the heat sink11. Therefore, the LED beam projected by the LED light source12would pass through the large piercing hole131of the center of the support rack13to downwardly irradiate without obstruction. Furthermore, generated heat can be upwardly scattered to enter the solid body111and dissipate outwardly and quickly through the scattered-like arranged heat dissipation slices.

With reference toFIGS. 2-5, the swing component2is composed of an upper sliding vane21and a lower guide flake22. The upper sliding vane21has a main slice body211having two sets of opposite sides and a curvature-like shape. The main slice body211is opened with a large center hole212at its center and has a set of through holes213on two opposite side edges, wherein a positioning screw hole214is further disposed between through holes213at one side. A coupling grip215is respectively raised at the other set of opposite side edges. A coupling hole216is opened at a middle portion of each coupling grip215. The lower guide flake22has a main sheet body221with two sets of opposite sides and having a curvature-like shape. A curvature of the main sheet body221corresponds to a curvature of the main slice body211. A large slot222is opened at the center of the main sheet body221. A narrow guide slot223is respectively disposed on one set of two opposite side edges of the lower guide flake22. A support sheet body224is formed on the other set of two opposite side respectively and downwardly bending from each edge. A bottom of the support sheet body224is further inwardly bent to form a coupling sheet body225. A set of connecting holes226is disposed on each coupling sheet body225, with a positioning recess274further disposed between the connecting holes226at one of the sides. The assembling of the swing component2is shown inFIGS. 1, 12. The upper sliding vane21is placed on the lower guide flake22to allow through holes213on the two side edges of the upper sliding vane21to respectively align with the narrow guide slots223on the two side edges of the lower guide flake22. At the same time, the positioning screw hole214also aligns with one of the narrow guide slots223. Therefore, a positioning member23is coupled and positioned to the positioning screw hole214of the upper sliding vane21after passing through the narrow guide slots223from the bottom to the top. Moreover, a regulation screw member24passes through a lower gasket241, an elastic member242and an upper gasket243and locks with a nut244after upwardly passing through the narrow guide slot223of the lower guide flake22and each through hole213of the upper sliding vane21. Accordingly, with the co-effect of the elastic force of the elastic member242, the nut244can be pushed to downwardly prop the main slice body211of the upper sliding vane21to attach and position the main sheet body221of the lower guide flake22. While using hands to upwardly lift the coupling grip215at two sides of the upper sliding vane21, each lower gasket241would push correspondingly elastic member242to upwardly move so that the main slice body211of the upper sliding vane21is attached to the main sheet body221of the lower guide flake22without pressing. The upper sliding vane21can be entirely lifted to move along the direction of the lower guide flake22. After reaching proper position, the main slice body211of the upper sliding vane21is re-attached and positioned to the main sheet body221of the lower guide flake22through co-pushing of elastic force of the elastic member242as long as the lifting of the coupling grips215at two sides of the upper sliding vane21is released.

With reference toFIGS. 2-5, the light distribution mechanism3is composed of a fastening cylinder31, a light distribution member32and a lens33. A top portion and a bottom portion of the fastening cylinder31are opened to inwardly form an accommodation space311. A shield wall312is at bottom periphery. A wall body of the top portion of the fastening cylinder31is opened with a plurality of slots313composed of a wide slot portion and a narrow slot portion. There are at least two slots313. The slots are preferably disposed at three places. The light distribution member32can be a reflective cup or a lens based upon demand. The reflective cup or the lens are one of the light distribution member32, and a user can selectively replace different light distribution members (the reflective cup or the lens) based upon the demand for illuminated articles or an illuminated environment. The lens33can be, but is not limited to, a transparent lens or a filter lens. While assembling, the lens33is first accommodated in the accommodation space311of the fastening cylinder31to be supported by the shield wall312. The light distribution member32is then accommodated in the accommodation space311to be supported by the lens33. The slots313of the fastening cylinder31correspond to coupling members, which are pre-locked, passing through the bottom coupling holes of the inner coupling hole columns113of the heat sink11. The narrow slot portion of the slot313and the coupling member achieve a stable snapping effect by rotating. Accordingly, the assembling of the light distribution mechanism3and the light source device1can be completed. Moreover, the light source device1and the swing component2must be assembled. First, the light distribution mechanism3and a combination body of the LED light source12and the support rack13vertically pass through the large center hole212and the large slot222of the swing component2to allow the bottom surface of the heat sink11to be in contact with the coupling grip215of the upper sliding vane21. Afterward, the assembly is slightly moved to enable the coupling hole216on the coupling grip215to align with the coupling hole on the bottom surface of the external coupling hole column112of the heat sink11. A coupling member217further passes through the coupling hole216to lock together with the external coupling hole column112. The completion of assembling the light source device1and the swing component2and the light distribution mechanism3can be done first.

With reference toFIGS. 1-3andFIGS. 6-7, the rotation component4is composed of an upper rotation ring41, an upper fastening ring42and a lower rotation ring43. The upper rotation ring41is a ring-like body and opened with a large piercing hole411at its center. A positioning bump412upwardly protrudes and at least three sets of bottom flanges413downwardly protrude and are disposed on the upper rotation ring body while at least two sets of coupling holes414are synchronously disposed near an inner edge, and a screw hole415is opened thereto to screw a packing member416. The upper fastening ring42is a ring-like body and opened with a large piercing hole421. The ring-like body is further divided into an external ring wall422for fastening purposes and an inner ring wall423for positioning purposes. The inner ring body423is higher than the external ring wall422. The height difference between both is to exactly accommodate the ring-like body's external edge (containing the height of the bottom flange413). The external ring wall422is opened with a plurality of first piercing holes424passed by a coupling member425(rivet for example) from the top to down. A second piercing hole426is respectively opened near the first piercing hole424. The second piercing hole426have holes respectively disposed at two sides of the first piercing hole424to conveniently select. An inner edge of the inner ring wall423is disposed with a position limiting bump427. A large piercing hole431is opened at the center of the lower rotation ring43and can be any shape, such as a circle or a square, without restriction. Three arc strip grooves432are uniformly divided and surrounded on the ring body and provided for a coupling member433(screw bolt for example) to pass through from the bottom to top. In addition, a coupling hole434is respectively disposed at corners of the large piercing hole431. The rotation component4incorporates a support rack mechanism44including a plate body441with a standing wall at its periphery combined into a square frame type fastened and mounted at the height places of a building. The support rack mechanism44includes a large mounting hole443in the plate body441and a set of a first coupling holes444and a set of a second coupling holes445surrounding the large mounting hole443. The quantity and position of the set of first coupling holes444correspond to the first piercing hole424of the external ring wall422. The quantity and diameter of the set of second coupling holes445correspond to the arc strip groove432of the lower rotation ring43and also correspond to the second piercing hole426on the external ring wall422at the same time. In addition, a set of third coupling holes446is further opened at the periphery of the large mounting hole443. While assembling, the upper rotation ring41can be first and completely assembled to the swing component2as shown inFIGS. 1, 12. A coupling sheet body225of the lower guide flake22in the swing component2is attached to an inner edge of the upper rotation ring41, and the positioning recess227on the coupling sheet body225first clamps the packing member416, which is pre-screwed, into the screw hole415of the coupling sheet body225to achieve initial alignment and positioning. At this time, the connecting hole26of the coupling sheet body225is exactly aligned to the coupling hole414of the upper rotation ring41. Thus, the coupling hole414and the connecting hole226are passed by a connecting member228to lock and connect. Next, the assembling of the rotation component4can be carried out. Firstly, the upper rotation ring41is placed on the plate body441of the support rack mechanism44, and the bottom flange413of the upper rotation ring41stands on the plate body441. At the same time, the large piercing hole411of the upper rotation ring41aligns with the large mounting hole443of the plate body41. An external edge of the inner ring wall423of the upper fastening ring42aligns with the ring body external edge of the upper rotation ring41so that the external ring wall422of the upper fastening ring42is attached to the plate body41, and it regulates to allow the first piercing hole424on the external ring wall422to align with the first coupling hole444of the plate body441one by one. Afterward, a coupling member425, from the top to down, passes through the first piercing hole424and the first coupling hole444to couple the two together. The packing member416can be further tightly locked to downwardly and tightly prop against the plate body441so that the upper rotation ring41may not randomly rotate. Next, the lower rotation ring43is attached to a bottom surface of the plate body441, and the large piercing hole431of the lower rotation ring43aligns with the large mounting hole443of the plate body441. At the same time, the arc strip groove432of the lower rotation ring43aligns with the second coupling hole445of the plate body441and the second piercing hole426of the external ring wall422one by one. The coupling member433then vertically passes through the arc strip groove432of the lower rotation ring43and the second coupling hole445and the second piercing hole426to achieve couple. Accordingly, the upper rotation ring41, the upper fastening ring42and the lower rotation ring43are completely assembled to the support rack mechanism44. The assembling among the light source device1, the swing component2, the light distribution mechanism3and the support rack mechanism44can be further completed.

With reference toFIGS. 6, 7, the casing component5mainly has a reflective mask52. The reflective mask52is an article having upper narrow and lower wide feature and can be any shape, for example, a square or circle, and is not limited during implementation. A wall521is formed at a bottom edge of an external surface of the reflective mask52, wherein its center is a light hole522vertically penetrated and showing upper narrow and lower wide feature. The light hole522further includes an inclined-like side hole disposed toward a side except a top surface portion. An external surface of the reflective mask52has at least two coupling walls synchronously disposed. The casing component5further includes a coupling frame54that is a square frame, with its corners respectively disposed with a coupling hole541, and a clamping member542is snapped at a periphery bottom edge thereto. The position of the coupling hole541corresponds to the coupling hole434disposed at corners of the large piercing hole431of the lower rotation ring43so that when the coupling frame54is attached to a bottom surface of the lower rotation ring43and the coupling hole434corresponds to the coupling hole541one by one, a coupling member543passes through the coupling hole434to couple the coupling hole541to stably assemble the coupling frame54at the bottom surface of the lower rotation ring43. Afterward the reflective mask52is vertically placed from the bottom edge of the coupling frame54until the coupling wall523of the reflective mask52crosses over the clamping member542of the coupling frame54to achieve clamping effect.

The casing component5includes a reflective mask52that provides a light emitting hole522to guide the beam emitted by the light source device1to downwardly illuminate. Therefore, other different assembling structures can be placed between the reflective mask52and the lower rotation ring43. With reference toFIG. 8, the casing component5can be a decoration frame55having a planar decoration tray551, and a circularly standing wall552is raised at the center, and the lower rotation ring43is downwardly disposed with a vertical wall435at the periphery of the large piercing hole431. While assembling, the standing wall552of the decoration frame55is pushed into the vertical wall435of the lower rotation ring43to achieve snapping and coupling. Afterward, the reflective mask52is accommodated from the bottom edge of the decoration frame55until the coupling wall523of the reflective mask52crosses over the standing wall52of the decoration framer55to achieve snapping and coupling.

The reflective mask52can be any shape, including a square or a circle, without restriction. Therefore, with reference toFIG. 9, the reflective mask52showing a circle is assembled with the coupling frame56showing a circle. The top surface of the coupling frame56is disposed with several coupling holes561, and several clamping members562are disposed at the bottom edge. Under this configuration, the lower rotation ring43does not apply (it is not assembled). While assembling, the coupling frame56is directly attached to the bottom surface of the plate body441, and the coupling hole561corresponds to the third coupling hole446of the plate body441. A coupling member563is coupled to the third coupling hole446after passing through the coupling hole561. Afterward, the reflective mask52is accommodated from the bottom edge of the coupling frame56until the coupling wall523of the reflective mask52crosses over the clamping member562of the coupling framer56to achieve clamping effect.

Of course, with reference toFIG. 10, the reflective mask52showing a circle and the decoration frame57showing a circle are assembled to the coupling frame56. The decoration frame56has a planar decoration tray571and a circularly standing wall572upwardly raised. The coupling frame56is shown inFIG. 9. Under this configuration, the lower rotation ring43does not apply as well (it is not assembled). While assembling, the coupling frame56is first locked to the bottom surface (as shown inFIG. 9) of the plate body441. The standing wall572of the decoration frame57is pushed into the coupling frame56to achieve snapping and coupling. The reflective mask52is accommodated from the bottom edge of the decoration frame57until the coupling wall523of the reflective mask52crosses over the standing wall572of the decoration frame57to achieve snapping and coupling.

With reference toFIG. 1, the power source device6is mounted on the plate body441of the support rack mechanism44. The power source device6can include a junction box61and a driver62, with the junction box61supplied by supply mains to conduct power to the driver62. The driver62performs circuit finishing work of step-down and regulator rectification therein. The LED light source12then is driven to emit light. Since current light source (the LED light source12for example) has low heat generation and low power consumption, in a ceiling or high location of a building, a plurality of downlights10located at different disposition points is cascaded by the same power source. At this time, the junction box61can conduct power to the downlight10at another disposition point.

Several portions of current building are paved with fireproof cottons to achieve fireproof effect. However, with reference toFIGS. 1, 12for the downlight10, since the heat sink11does not have a cover, it may not be in contact with fireproof cottons. The invention can be shown asFIG. 11in which the plate body441of the support rack mechanism44is covered with an insulation case7for covering the portion of the downlight10located above the plate body441. Accordingly, the insulation case7can be in contact with fireproof cottons to increase the fireproof effect.

The downlight10according to an embodiment of the invention will generate the following usage status depending upon whether or not the upper sliding vane21of the swing component2performs a motion of deflecting an angle with respect to the lower guide flake22and whether or not the upper rotation ring and the lower rotation ring43carry out a motion of rotating an angle on a horizontal plane:

1. With reference toFIGS. 1, 12, when the upper sliding vane21of the swing component2is retained at the upper position of the lower guide flake22(as the standing status), the upper rotation ring41and the lower rotation ring43do not perform any rotation motion on a horizontal plane. The LED light source12vertically and downwardly projects a beam. When the beam passes through the light distribution member32of the light distribution mechanism3, the beam range will diffuse. When diffused beam then downwardly passes through the reflective mask52of the casing component5, the beam range will further diffuse so that the beam can pass through the light emitting hole522to project a large field of beam to the lower space.

2. With reference toFIG. 13, the upper sliding vane21of the swing component2can tilt toward a side (right side shown in the figure), and selectively perform a deflection motion at a certain degree from original standing status. The coupling grips215at two sides of the upper sliding vane21are held upwardly by hands to allow each lower gasket241to push correspondingly elastic members242that are upwardly moved and compressed so that the main slice body211of the upper sliding vane21and the main sheet body221of the lower guide flake22are not pressed. Accordingly, the upper sliding vane21is held to move along the narrow guide slot223of the lower guide flake22. After reaching a proper position, the coupling grips215at two sides of the upper sliding vane21held by hands are released. The main slice body211of the upper sliding vane21is re-attached to the main sheet body221of the lower guide flake22by an elastic force generated from the elastic member242such that the upper sliding vane21of the swing component2, directed toward a side, selectively performs a deflection motion at a certain angle and can be operated anytime to deflect toward the middle so as to restore as standing status shown inFIG. 12.

3. With reference toFIG. 13, while operating the upper sliding vane21of the swing component2to perform a deflection motion at a certain degree, the light source device1and the light distribution mechanism3assembled to the upper sliding vane21are deflected synchronously. The direction of beam projected by the LED light source12is accordingly changed to obliquely project toward another side from the original vertical downward direction. Since the light emitting hole522of the reflective mask52includes the top surface portion and side hole inclined toward a side, the light emitting hole522(comprising the side hole) of the reflective mask52can be entirely passed by the obliquely projected beam without any obstruction after moving the swing rack2to perform the deflection motion.

4.FIG. 14is a top view ofFIG. 12to represent that the upper sliding vane21of the swing component2does not perform any deflection motion (retaining the standing status) on the vertical plane. Please refer toFIG. 15fromFIG. 14, the upper rotation ring41carries out rotation motion at a certain degree on the horizontal plane together with the swing component2. Since the ring body of the upper rotation ring41is covered by the inner ring wall423of the upper fastening ring42, and the upper fastening ring42is locked by the first coupling member425, the upper rotation ring41can rotate within the range of the inner ring wall423without extrication. While in operation, the packing member416propping the upper rotation ring41must be firstly released, and force is imposed to push the swing rack2to link the upper rotation ring41for synchronous rotating. After rotating to a new position, the packing member416is locked again to tightly re-prop the upper rotation ring41.FIG. 15shows 90 degree of rotation fromFIG. 14. In the process, the bottom flange413can reduce friction between the upper rotation ring41and the plate body441during rotation. At the same time, since the positioning bump412of the upper rotation ring41is restricted by the position limiting bump427of the inner ring wall423, the upper rotation ring41can merely rotate in single direction and then turns around, and its rotation degree is unable to exceed 360 degrees. Thus, the design can be set from 0 degrees to 355 degrees.

5.FIG. 15represents that after the upper rotation ring41carrying out rotation motion at a certain degree on the horizontal plane together with the swing component2is completed, with reference toFIG. 16, the swing component2, toward a side, performs a deflection motion at a certain degree from original standing status. Since it performs both horizontal rotation and vertical deflection, the direction of the LED beam projection will be simultaneously regulated to the position required for rotation.

6. Since the lower rotation ring43is attached to the bottom surface of the plate body441and the coupling member433passes through the arc strip groove432to correspondingly couple the second coupling hole445of the plate body441, the coupling member433is taken as restriction point to rotate the lower rotation ring43. Its rotation angle range is the angle range of the arc strip groove432. While rotating the lower rotation ring43, the reflective mask52and the coupling frame54and/or the decoration frame54are driven to rotate. Since the coupling frame54and the decoration frame55are squares, edges of the coupling frame54or the decoration frame55can be regulated by rotation so that it can be identical to the wall surface direction of the building so as to increase beauty.

Upon the foregoing, the downlight10of the invention can be conveniently assembled. Two-way rotation functions of horizontal rotation and vertical swing can be operated while in use so that a user can select and regulate a required beam projection direction and angle to have stronger practicality in illumination.