CN209146747U - Focusable LED Lights - Google Patents

Abstract

A focus-adjustable LED lamp includes: a base, a light source, a light distribution element and a focusing mechanism, the base has a mounting surface and an annular side wall surrounding the mounting surface; the light source is mounted on the base on the surface; the light guide member and the focusing mechanism are relatively fixed and located in the irradiation direction of the light source; the focusing mechanism includes a rotating ring and a first limiting member, the rotating ring is sleeved on the base The inner side of the annular side wall of the seat, the side wall is provided with a first thread guide groove, the limiting member is fixed on the base, and has a first stop part, which cooperates with the first thread guide groove to make the The rotating ring can rotate relative to the base to adjust the distance between the light distribution element and the light source.

Description

Focusable LED Lights

technical field

The utility model relates to the technical field of lamps, in particular to a lighting device with precise focusing.

Background technique

The International Commission on Illumination (CIE Europe) stipulates that the angle between the center line of the beam and the time when the light intensity is reduced to 50% of the maximum light intensity of the center line is the beam angle (as shown in Figure 1), which reflects the spot size and light intensity of the luminaire, The same light source will produce different lighting effects when using different beam angles. At the lighting site, according to different situations, the lighting needs to have different lighting effects. The zoom luminaire produces different lighting effects by adjusting the focal length, which can meet various lighting needs in different situations in the use of the luminaire.

The existing zoom lamps have the following shortcomings: unstable focusing, low zoom accuracy, and inability to accurately zoom.

Utility model content

The purpose of the present invention is to provide a lighting device with convenient and precise zooming.

The adjustable focus lighting device includes: a base, a light source, a light distribution element and a focusing mechanism, the base has a mounting surface and an annular side wall surrounding the mounting surface; the light source is mounted on the base of the base on the installation surface; the light distribution element and the focusing mechanism are relatively fixed and located in the irradiation direction of the light source; the focusing mechanism includes a rotating ring and a first limiting member, and the rotating ring is sleeved on the The inner side of the annular side wall of the base, the side wall is provided with a first thread guide groove, the limiting member is fixed on the base, and has a first stop part, which cooperates with the first thread guide groove, so that all the The rotating ring can rotate relative to the base to adjust the distance between the light distribution element and the light source.

Further, a clamping groove is provided above and/or below the first thread guide groove, and the second limiting member has a second limiting portion, which cooperates with the clamping groove and restricts the rotating ring to perform a step-by-step rotational movement. .

Further, the focusing mechanism further includes a second limiting member, the side wall of the rotating ring is provided with a second thread guide groove, the second limiting member is fixed on the base, and has a first limiting member. The position is matched with the second thread guide groove.

In some embodiments, the second limiting portion cooperates with the locking groove to limit the rotating ring to perform stepwise rotating motion at equal intervals.

In some embodiments, the second limiting portion cooperates with the locking groove to restrict the rotating ring from performing progressive rotating motions with unequal intervals.

In some embodiments, the length of the first thread guide groove is less than half of the circumference of the rotating ring.

In some embodiments, the length of the first thread guide groove is more than one third of the circumference of the rotating ring.

In some embodiments, the first limiting portion is parallel to the second limiting portion.

In some embodiments, the first limiting portion protrudes from the second limiting portion.

In some embodiments, the second limiting portion has elasticity.

In some embodiments, the card slot includes a series of alternating concave and convex portions.

In some embodiments, the card slot is formed by a series of spaced recesses.

Preferably, the width of the recess is 1-20 mm. More preferably, the width of the recess is 1-5 mm.

In some embodiments, the recesses have the same width.

In some embodiments, the width of the recess is tapered. Preferably, the first thread guide groove has a lower end portion and an upper end portion, and the width of the concave portion is gradually reduced with the lower end portion of the first thread guide groove as a starting point.

In some embodiments, the first limiting portion of the first limiting member is located in the first thread guide groove, and the second limiting portion is located in the concave portion. When the rotating ring rotates relative to the base, The first limiting portion of the limiting member is guided and slid in the threaded guide groove, and each time the rotating ring is rotated, the second limiting portion moves from one recess to the next adjacent recess.

In some embodiments, the card slot is formed by a series of ribs arranged at intervals, and the spacing of the ribs is 1-20 mm.

In some embodiments, the ribs are equally spaced.

In some embodiments, the first thread guide groove has a lower end portion and an upper end portion, and with the lower end portion of the first thread guide groove as a starting point, the spacing between the ribs gradually decreases.

Further, the snap groove intersects with the first thread guide groove.

Preferably, the card slot is perpendicular to the mounting surface of the base.

Preferably, when the rotating ring rotates relative to the base plate, the second limiting portion interacts with the card slot to emit sound.

Preferably, each time the rotating ring performs a step-by-step rotational motion, the second limiting portion interacts with the card slot to emit a sound.

In some embodiments, the first limiting member is located inside the rotating ring.

In some embodiments, the first limiting member is located outside the rotating ring.

Preferably, the height difference of the first thread guide groove is 20 mm or less. More preferably, it is 15 mm or less.

Further, the light distribution element is a reflector or a lens or a combination of the two.

In some embodiments, the rotating ring is a rotating cover structure connected to the base.

In some embodiments, the light source includes an LED lamp bead and a reflective cup located above the LED lamp bead, and the reflective cup is fixed by a transparent glass ring.

In some embodiments, the light distribution element is a reflective cup, and the bottom of the reflective cup has an opening, and the light source passes through the opening and is located in the large reflective cup.

In some embodiments, the light source includes an LED chip, and the focusing mechanism is adjusted to make the reflector move up and down. When it is at the highest position, the bottom of the reflector is aligned with the bottom of the LED chip. flat.

The effect of the lighting device is: by rotating the rotating ring of the lighting device, the relative position of the light distribution element and the light source is changed, thereby changing the beam angle and the size of the light spot. Further, a snap groove is provided above or below the thread guide groove of the rotating ring, and a second limit portion is provided to cooperate with the snap groove, thereby restricting the rotating ring to perform step-by-step rotational motion, and the radian of the rotating ring can be easily controlled. , so that it is convenient to precisely adjust the angle required by the optics.

The lighting device of the present invention can be a track spotlight, an AR light, a PAR light (Parabolic Aluminum Reflector light), a downlight, and the like. Taking track spotlights as an example, the beam angle ranges from 20° to 40°.

Other features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the description, claims and drawings.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and are used to explain the present invention together with the embodiments of the present invention, and do not constitute a limitation to the present invention. Furthermore, the figures in the figures are descriptive summaries and are not drawn to scale.

FIG. 1 is a schematic diagram illustrating the definition of the beam angle of a conventional light-emitting device.

FIG. 2 is a schematic perspective view illustrating a first embodiment of the lighting device.

FIG. 3 is a schematic diagram of a three-dimensional exploded structure, illustrating the first embodiment.

FIG. 4 is an incomplete perspective combined view illustrating a focusing mechanism of this embodiment.

FIG. 5 is a schematic partial perspective view illustrating a rotating ring of this embodiment.

Figure 6 is a partial perspective schematic view illustrating a rotating ring of this embodiment.

FIG. 7 is a partial enlarged view illustrating the structure of a card slot of this embodiment.

FIG. 8 is a schematic partial perspective view illustrating a first limiting member of this embodiment.

FIG. 9 is a partial perspective view illustrating a second limiting member of this embodiment.

Figure 10 is a schematic partial cross-sectional view illustrating the first embodiment.

Figure 11 is a schematic partial cross-sectional view illustrating the first embodiment.

Figure 12 is a graph illustrating the corresponding beam angles of the lighting device at different positions of the reflector.

FIG. 13 is a graph illustrating the changes of the beam angle and peak light intensity of the lighting device at different positions of the reflector.

Figure 14 is a schematic perspective view illustrating a second embodiment of the lighting device.

FIG. 15 is a schematic diagram of a three-dimensional exploded structure, illustrating the second embodiment.

Figure 16 is a schematic partial cross-sectional view illustrating the second embodiment.

FIG. 17 is a schematic diagram of a three-dimensional exploded structure, illustrating the third embodiment.

Figure 18 is a schematic partial cross-sectional view illustrating the third embodiment.

Label description:

100: base; 110: side wall of base; 111: outer side wall of base; 120: mounting surface of base; 200: light source module; 210: light source circuit board; 220: lamp beads; 230: light transmission glass cylinder; 240: small reflector; 300: rotating ring; 310: upper part of the rotating ring; 311: the outer side wall of the upper part; 320: the lower part of the rotating ring; 321: the outer side wall of the lower part; 330: the inner side wall of the rotating ring; 331: The first thread guide groove; 331A: The lowest part of the first thread guide groove; 331B: The highest part of the first thread guide groove; 332: The second thread guide groove; 400: light distribution element; 410: reflector; 420: lens; 430: cushion; 500: power drive; 610, 620: limit member; 611, 621: connecting part of limit member; , 622: the first limiting part; 613: the second limiting part; 620: the second limiting member.

Detailed ways

The structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the contents disclosed in the specification, so as to be understood and read by those who are familiar with the technology, and are not used to limit the implementation of the present invention. condition, therefore does not have technical substantive significance, any modification of structure, the change of proportional relationship or the adjustment of size, without affecting the effect that the utility model can produce and the purpose that can be achieved, all should still fall within the present utility model. The scope of the technical content disclosed by the new model can be covered. At the same time, the terms such as "up", "down", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and clarity, and are not used to limit this specification. The implementable scope of the utility model, and the change or adjustment of the relative relationship, shall also be regarded as the implementable scope of the present utility model unless the technical content is substantially changed. Unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, It can also be an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

As shown in FIG. 2 to FIG. 3 , the adjustable focus lighting device includes a base 100 , a light source module 200 , a light distribution element 300 , a focus adjustment mechanism and a power drive 500 . The base 100 has a mounting surface 120 and an annular side wall 110 surrounding the mounting surface 120, the light source module 200 is mounted on the mounting surface 120 of the base, and the light distribution element 400 and the focusing mechanism are relatively fixed and located in In the irradiation direction of the light source 200 , the power driver 500 is installed on the bottom of the base 100 .

In a preferred embodiment, the light source module 200 may include a substrate 210 , a lamp bead 220 and a small reflector 240 , the lamp bead 220 is preferably an LED lamp bead, and the small reflector 240 mainly plays the role of anti-glare. Preferably, a high light-transmitting glass ring 230 is arranged on the outer circumference of the lamp bead 220 , the lamp bead 220 is located in the glass ring 230 , and the small reflector 240 is fixed above the lamp bead 220 through the glass ring 230 . Compared with the traditional frame fixing method, it can be more reliable. In one embodiment, the diameter of the small reflector 240 is between 10 and 50 mm, for example, 20 to 30 mm, which can achieve a better anti-glare effect. The glass ring 230 is preferably made of high-transparency quartz glass, and the diameter is controlled at 10~50mm, the height is controlled at 3-20mm, for example, it can be 5-10mm to achieve better focusing effect.

As shown in FIG. 4 , the focusing mechanism includes a rotating ring 300 and a limiting member 610/620. As shown in FIG. 5 , the rotating ring 300 is a hollow cylindrical structure with an upper part 310 and a lower part 320 , and the lower part 320 is sleeved on the inner side of the annular side wall 110 of the base 100 , for example, the rotating ring 300 can be a The rotating cover structure is sleeved in the side wall 110 of the base. Preferably, the outer side 311 of the upper portion 310 protrudes from the outer side 321 of the lower portion 320 and is substantially flush with the outer side 111 of the side wall 110 of the base. Further, the side wall 330 of the rotating ring 300 is provided with thread guide grooves 331/332. The limiting member 610/620 can be fixed on the mounting surface 120 of the base, and has a first limiting portion 611/621, the first limiting portion 611/332 slides in the threaded guide groove 331/332, so that the rotating ring The 300 can rotate relative to the base 100 to adjust the distance between the light distribution element 400 and the light source module 200 . Preferably, the number of the thread guide grooves 331 is two or more. Taking two as an example, the preferred length of each thread guide groove 331 is more than one-third and one-half of the circumference of the rotating ring 300 Below the circumference, the shaking of the rotating ring 300 during the rotating motion can be reduced. Preferably, the preferred height difference h of the thread guide groove 331 is 3~20mm. When it is too low, the range of adjusting the beam angle is relatively limited. When it is too high, it is not conducive to improving the accuracy of focusing, and it is easy to cause shaking , reduce the system light efficiency. Preferably, the limiting members 610 / 620 are located inside the rotating ring 300 .

As shown in FIG. 6 , in a preferred embodiment, a locking groove 340 is provided above and/or below at least one thread guide groove 331 , and the limiting member 611 cooperating with the thread guide groove 331 also has a second limit As shown in FIG. 8 , when the rotating ring 300 rotates relative to the base 100 , the second limiting part 613 interacts with the slot 340 , thereby restricting the rotating ring 300 to perform step-by-step rotating motion. The clamping groove 340 intersects with the thread guide groove 331 (that is, the clamping groove 340 is not parallel to the thread guide groove 331 ), so as to ensure that when the rotating ring 300 rotates relative to the base 100 , the second limiting portion 613 and the clamping groove 340 There will be an interaction force between them. Preferably, the slot is perpendicular to the mounting surface 120 of the base. As shown in FIG. 7 , the latching groove 340 may be formed by a series of alternately arranged concave portions 341 and convex portions 342 . The first limiting portion 612 of the limiting member 610 is located in the thread guide groove 331 , and the second limiting portion is located in the threaded guide groove 331 . In the concave portion 341 , when the rotating ring 300 rotates relative to the base 100 , the first limiting portion 612 of the limiting member 610 guides and slides in the thread guide groove 331 , and the second limiting portion 613 acts on the locking groove 340 , every time the rotating ring is rotated, the second limiting portion 613 moves from one concave portion 341 to the next adjacent concave portion 341 . During this process, the second limiting portion 613 interacts with the convex portion 342 and can emit once For sound, preferably, the width D of the recess is 1-20mm, for example, it can be 1-5mm, or 5-10mm, or 10-20mm. In other embodiments, the card slot 340 may be formed by a series of recesses 341 arranged at intervals. In other embodiments, the card slot 340 can also be formed by a series of ribs 342 arranged at intervals, and the distance D between each rib is preferably 1-20mm, for example, 1-5mm, or 5-10mm , or 10-20mm. In some embodiments, the card grooves 340 are arranged at equal intervals (for example, the widths of all the recesses 341 may be the same, or the distances between all the ribs 342 may be the same). The moving distance is the same, that is, the step-by-step rotary motion is performed at equal intervals. In other embodiments, the spacing of the clamping grooves 340 may be gradual (for example, the width of the concave portion 341 may be gradually reduced, or the spacing between the ribs 342 may be gradually reduced), preferably, close to the thread guide groove 331 The distance between the 331A end of the 331A is larger, and the distance toward the 331B end is smaller, and the middle is gradual. In this way, through accurate calculation, it is possible to adjust the beam angle of a fixed angle every time a step-by-step rotary motion is performed.

As shown in FIGS. 8 and 9 , in a specific embodiment, the first limiting member 610 and the second limiting member 620 may further include a connecting portion 611 / 612 for connecting with the base 100 . Further, the first limiting portion 612 / 622 of the limiting member may be a guide post or a guide protrusion, and the second limiting portion 613 may be a column-like structure, a convex block or a sheet-like structure. Preferably, the second limiting portion 613 is parallel to the first limiting portion 612 , and may be located above or below the first limiting portion 613 , and the first limiting portion 612 protrudes from the second limiting portion 613 . Preferably, the second limiting portion 613 has a certain elasticity, and its material can be a metal dome or a plastic piece with certain elasticity.

10 and 11, the light distribution element 400 is a large reflective cup 400, which is fixedly connected to the upper part 310 of the rotating ring 300, and is erected above the light source module 200, and the bottom 401 thereof has an opening, so that the light source module 200 is located in the Inside the large reflector. In the structure shown in FIG. 10 , the rotating ring 300 is rotated to the lowest position. At this time, the first limiting part 612 is located at the end 331B of the thread guide groove 331 . At this time, the light source module 200 is located in the reflector 400 , and the light source module The bottom of the lamp bead 220 of 200 is higher than the bottom 401 of the reflector cup; in the structure shown in FIG. 11 , the rotating ring 300 is rotated to the highest position, and the first limit part 612 is located at the end 331A of the thread guide groove 331 at this time. The bottom 221 of the lamp bead 220 of the light source module 200 is substantially flush with the bottom 401 of the reflector.

In the above lighting device, by rotating the rotating ring 300 of the lighting device to change the relative position of the light distribution element 400 and the light source 200, the beam angle and the size of the light spot can be changed. Specifically, the length of the thread guide groove can be adjusted through the design of the rotating ring 300, which can be accurately converted into an adjustable vertical height. At the same time, a clamping groove 340 is provided above or below the thread guide groove 331 to provide the second limiting portion 613 and the clamping groove 340. The grooves 340 fit together to limit the step-by-step rotational movement of the rotating ring, which can easily control the radian of the rotation of the rotating ring, thereby facilitating precise adjustment of the angle required by the optics.

Figure 12 shows a graph of the corresponding beam angle of the reflector of a lighting device at different positions. In this lighting device, the height difference of the thread guide groove 331 is about 6 mm, that is, the adjustable vertical height of the rotating ring 300 is 6 mm, and the adjustment range of the beam angle is between 20° and 40°. Taking the bottom 401 of the reflector 400 flush with the bottom 201 of the LED chip of the light source 200 as the reference point (point 0), which is the position shown in FIG. 11 , rotate the rotating ring 300 downward to the position shown in FIG. 10 . , the slope of the change curve of the beam angle gradually becomes larger. According to the curve, the spacing of the card slots 340 can be further designed. In some embodiments, the grooves 340 may be equally spaced (all the recesses 341 have the same width, or all the ribs 342 have the same spacing), and at this time, the rotating ring 300 performs step-by-step rotating motions with equal spacing (that is, the first The two clamping parts 613 move from the concave part 341 of one clamping slot to the concave part of the next adjacent clamping slot), and the adjusted vertical heights are the same, and the adjusted light exit angle at this time is gradual. In other embodiments, the spacing of the clamping grooves 340 may be gradually reduced (the width of the concave portion 341 is gradually reduced, or the spacing between the ribs 342 is gradually reduced), at this time, the rotating ring 300 is not equal The step-by-step rotary motion of the spacing, the vertical height of its adjustment is gradually changed, and the angle of each adjustment can be the same at this time. Figure 13 shows the variation of beam angle and peak intensity at different positions.

Figures 14-16 show another LED luminaire with adjustable focus. Different from the lighting device shown in FIGS. 2-3 , the light distribution element 400 of the lighting device shown in FIG. 14 includes a reflector 410 and a lens 420 , and further, an elastic pressure ring 430 may be provided for fixing the reflector 410 ; The light source module 200 can use general lamp beads. In this embodiment, the reflective cup 410 and the lens 420 are relatively and fixedly connected to the rotating ring 300. When the rotating ring 300 is rotated, the first limiting parts 612 and 622 slide in the threaded guide groove, and the second limiting part 613 is connected to the The grooves 340 interact with each other, so that the rotating ring 300 can perform a step-by-step rotating motion relative to the base 100 , so as to adjust the distance between the reflector 410 , the lens 420 and the light source 200 . As a variant embodiment, the reflector 410 can be directly fixed on the base 100, and the lens 420 is relatively fixedly connected to the rotating ring 300. At this time, when the rotating ring 300 rotates relative to the base 100, only the distance between the lens 420 and the light source is adjusted. the distance.

Figures 17~18 show another LED luminaire with adjustable focus. Different from the lighting device shown in Figures 2-3, the focusing mechanism of the lighting device shown in Figures 17-18 is different. In this embodiment, the thread guide grooves 311 and 312 and the locking groove 340 are located on the outer side wall 321 of the lower part of the rotating ring, and the limiting members 610 and 620 are located outside the rotating ring 300 . Specifically, the stopper member can be fixed on the mounting surface 120 of the base, can also be fixed on the side wall 110 of the base, or can be directly integrally formed with the side wall of the base. In a specific embodiment, when the base 100 is used as a heat sink at the same time, the material of the limiting member is preferably different from that of the base. In this case, the limiting member can be an independent accessory installed on the base, which can be simply Focus adjustment is achieved; in another specific embodiment, when the base 100 is separated from the heat sink of the lighting device, the limiting member may be integrally formed with the base.

The above descriptions are merely examples of the present invention, which cannot limit the scope of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention and the description of the utility model are still within the scope of the patent of the present invention.

Claims (15)

1. the LED lamp of adjustable focus, comprising: pedestal, LED light source, light distribution element and focus adjusting mechanism, the pedestal have installation table Face and annular sidewall around the mounting surface；The light source is installed in the mounting surface of the pedestal；The light distribution element Direction of illumination that is relatively fixed with the focus adjusting mechanism and being located at the light source；It is characterized by: the focus adjusting mechanism includes rotation Change and the first limit component, the rotating ring are sheathed on the inside of the annular sidewall of the pedestal, and side wall is equipped with the first screw thread and leads To slot, the limit component is fixed on the pedestal, has the first limiting section, is cooperated with the screw thread guide groove, is made described Rotating ring can the relatively described pedestal make rotating motion to adjusting the distance between the light distribution element and the light source.

2. LED lamp according to claim 1, it is characterised in that: the focus adjusting mechanism further includes the second limit component, institute The side wall for stating rotating ring is equipped with the second screw thread guide groove, and second limit component is installed on the pedestal, has the first limit Position portion cooperates with the second screw thread guide groove.

3. LED lamp according to claim 1, it is characterised in that: the first screw thread guide groove above and or below is set There is card slot, first limit component has the second limiting section, cooperates with the card slot, limits the rotating ring and do step-by-step movement rotation Transhipment is dynamic.

4. LED lamp according to claim 3, it is characterised in that: the second limiting section and the card slot cooperate, described in limitation Rotating ring does equidistant stepwise rotational movement.

5. LED lamp according to claim 3, it is characterised in that: the length of the first screw thread guide groove is the rotating ring Perimeter less than half.

6. LED lamp according to claim 3, it is characterised in that: the length of the first screw thread guide groove is the rotating ring Perimeter one third more than.

7. LED lamp according to claim 3, it is characterised in that: first limiting section and second limiting section are flat Row.

8. LED lamp according to claim 3, it is characterised in that: first limiting section protrudes from second limit Portion.

9. LED lamp according to claim 3, it is characterised in that: the card slot is vertical with the mounting surface of the pedestal.

10. LED lamp according to claim 3, it is characterised in that: when the rotating ring does rotation fortune relative to the pedestal When dynamic, second limiting section makes a sound with card slot interaction.

11. LED lamp according to claim 3, it is characterised in that: the rotating ring often does a step-by-step movement rotation fortune Dynamic, second limiting section and card slot interaction issue a sound.

12. LED lamp according to claim 3, it is characterised in that: the card slot includes a series of alternately arranged recess portions The protrusion and.

13. LED lamp according to claim 3, it is characterised in that: the card slot includes a series of spaced recess portions It constitutes.

14. LED lamp according to claim 12 or 13, it is characterised in that: the first limit of first limit component Portion is located in the first screw thread guide groove, and the second limiting section is located in the recess portion, when rotating ring opposite base makes rotating motion When, the first limiting section of the limit component carries out guiding in screw thread guide groove and slides, and it is every to rotate the rotating ring, second Limiting section is moved in next adjacent recess portion by a recess portion.

15. LED lamp according to claim 3, it is characterised in that: the card slot is by a series of spaced rib structures At.