A downlight

Abstract

The present invention is applicable to the field of lighting technology and provides a downlight. The downlight of the present invention includes a turntable, a heat dissipation component disposed at one end of the turntable, a height adjustment member rotatably connected to the turntable at one end, and a light source assembly disposed within the heat dissipation component. The height adjustment member is provided with an adjustment hole, and a portion of the heat dissipation component is disposed within the adjustment hole and is capable of reciprocating within the adjustment hole to adjust the relative height between the heat dissipation component and the turntable. The heat dissipation component can reciprocate within the adjustment hole on the height adjustment member, thereby making the overall height of the downlight adjustable to accommodate mounting brackets of different heights. Compared with existing downlights, the downlight of the present invention has higher compatibility.

Description

Technical Field

[0001] The present invention relates to the technical field of lighting, and in particular to a downlight. Background Art

[0002] Downlights are an improvement on traditional lamps. Their aesthetically pleasing, lightweight design doesn't take up much space, allowing for seamless integration and perfection of architectural décor without disrupting the fixture's design. Their concealed light source adds a soft, even visual experience. To create a warm and inviting atmosphere, install multiple downlights to alleviate the sense of oppression. These downlights are commonly found in hotels, homes, and cafes.

[0003] However, the heights of existing downlights are fixed and uniform when they are formed, and each type of downlight can only be installed on a mounting bracket of a corresponding height. That is, the existing downlights are not compatible with mounting brackets of different heights at the same time, making it difficult to meet the usage needs of consumers. Summary of the Invention

[0004] The object of the present invention is to provide a downlight, aiming to solve the technical problem of low compatibility of existing downlights.

[0005] The present invention is implemented as follows: a downlight comprising:

[0006] Turntable;

[0007] A height adjustment member, one end of which is rotatably connected to the turntable, and an adjustment hole is provided on the height adjustment member;

[0008] a heat dissipation assembly disposed at one end of the turntable, wherein a portion of the heat dissipation assembly is disposed in the adjustment hole and is capable of reciprocating in the adjustment hole to adjust the relative height between the heat dissipation assembly and the turntable; and

[0009] The light source component is arranged in the heat dissipation component.

[0010] Furthermore, the height adjustment members are rotatably connected to opposite sides of the turntable, and sliders are provided on opposite sides of the heat dissipation assembly. The sliders are embedded in the corresponding adjustment holes of the height adjustment members and can move back and forth in the adjustment holes.

[0011] Furthermore, the adjustment hole is a waist-shaped hole, and the waist-shaped hole extends from one end close to the turntable toward one end close to the heat dissipation component.

[0012] Furthermore, the heat dissipation assembly includes a first heat dissipation member connected to the height adjustment member, and a second heat dissipation member connected to an end of the first heat dissipation member away from the turntable, and the light source assembly is disposed in the first heat dissipation member;

[0013] The first heat dissipation member includes a main body and protrusions respectively provided on opposite sides of the main body, and the protrusions are interference-fitted in the corresponding adjustment holes.

[0014] Furthermore, the downlight further includes a first fastener, and the first fastener is used to fix the protrusion in the adjustment hole.

[0015] Furthermore, the turntable has a hollow cavity, and one end of the main body away from the second heat sink extends into the hollow cavity. The turntable is provided with an avoidance notch, and the avoidance notch is used to avoid interfering with the rotation of the first heat sink;

[0016] The shape of the side of the second heat dissipation member corresponding to the avoidance notch matches the avoidance notch to avoid interfering with the rotation of the second heat dissipation member.

[0017] Furthermore, the rotation angle range of the height adjustment member relative to the central axis of the turntable is -15° to 30°, and the rotation angle range of the heat dissipation component relative to the central axis of the turntable is 0° to 45°.

[0018] Furthermore, the downlight further includes a face ring sleeved outside the turntable, and the face ring can rotate relative to the turntable.

[0019] Furthermore, an annular groove is provided on the outer side of the turntable, and a plurality of spring pieces are provided on the inner wall of the face ring along its circumference and are clamped in the annular groove. The inner wall of the face ring is also provided with a first limiting protrusion for preventing the face ring from detaching from the turntable.

[0020] Furthermore, the downlight also includes a decorative piece that is detachably sleeved on the inner side of the turntable, and a pressure ring provided at one end of the heat dissipation assembly close to the turntable, and a tooth-shaped microstructure for anti-glare is provided on the inner side of the pressure ring.

[0021] The downlight provided by the present invention includes a turntable, a heat dissipation component arranged at one end of the turntable, a height adjustment member rotatably connected to the turntable at one end, and a light source member arranged inside the heat dissipation component. An adjustment hole is opened on the height adjustment member, and part of the heat dissipation component is passed through the adjustment hole and can reciprocate in the adjustment hole to adjust the relative height between the heat dissipation component and the turntable. The heat dissipation component can reciprocate in the adjustment hole on the height adjustment member, so that the overall height of the downlight is adjustable to adapt to mounting brackets of different heights. Compared with existing downlights, the downlight of the present invention has higher compatibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of a downlight provided by an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the exploded structure of a downlight provided by an embodiment of the present invention;

[0025] Figure 3 is a schematic cross-sectional structural diagram of a downlight provided by an embodiment of the present invention;

[0026] Figure 4 and Figure 5 is a schematic diagram of the rotation of a height adjustment member of a downlight provided by an embodiment of the present invention;

[0027] Figure 6 is a schematic diagram of the exploded structure of the decorative ring and the turntable provided in an embodiment of the present invention;

[0028] Figure 7 is a schematic diagram of the exploded structure of a light source assembly provided by an embodiment of the present invention;

[0029] Figure 8 It is a schematic diagram of the exploded structure of the heat dissipation assembly provided by an embodiment of the present invention.

[0030] Among them, the reference numerals in the figures are:

[0031] 1-turntable; 11-hollow cavity;

[0032] 12-avoidance gap; 13-second limiting portion;

[0033] 14-annular groove; 15-buckle;

[0034] 2-height adjustment piece; 21-adjustment hole;

[0035] 22-first limiting portion; 3-heat dissipation component;

[0036] 31-first heat sink; 311-main body;

[0037] 3111-accommodation cavity; 3112-hollow groove;

[0038] 3113-third mounting hole; 312-protrusion;

[0039] 3121-slider; 32-second heat sink;

[0040] 321-Center; 3211-Boss;

[0041] 322-main body; 3221-fourth mounting hole;

[0042] 323-branch; 3231-rib;

[0043] 4-light source assembly; 42-COB light source;

[0044] 43-light source bracket; 431-mounting slot;

[0045] 432-gasket groove; 433-second mounting hole;

[0046] 434-light source slot; 44-lens;

[0047] 441-light focusing portion; 442-mounting portion;

[0048] 443-first mounting hole; 45-reflective cup;

[0049] 5-face ring; 51-shrapnel;

[0050] 52-first limiting protrusion; 6-pressing ring;

[0051] 61- second limiting protrusion; 7- decorative piece;

[0052] 71-avoidance protrusion; 72-card slot;

[0053] 8- Gasket. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0055] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly or indirectly on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The terms "upper", "lower", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of description and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this patent. The terms "first" and "second" are only used for the convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0056] In order to illustrate the technical solution of the present invention, the following is a detailed description with reference to specific drawings and embodiments.

[0057] See also Figures 1 to 3 , an embodiment of the present invention provides a downlight, comprising:

[0058] Turntable 1;

[0059] A height adjustment member 2, one end of which is rotatably connected to the turntable 1. One end of the height adjustment member 2 can be, but is not limited to, rotatably connected to the side of the turntable 1. An adjustment hole 21 is provided on the height adjustment member 2.

[0060] The heat dissipation assembly 3 is provided at one end of the turntable 1 , and a portion of the heat dissipation assembly 3 is passed through the adjustment hole 21 and can reciprocate in the adjustment hole 21 to adjust the relative height between the heat dissipation assembly 3 and the turntable 1 ; and

[0061] The light source assembly 4 is disposed inside the heat dissipation assembly 3. It should be noted that the above-mentioned height refers to the dimension in the direction parallel to the central axis of the turntable 1.

[0062] The downlight of the embodiment of the present invention includes a turntable 1, a heat dissipation component 3 provided at one end of the turntable 1, a height adjustment member 2 rotatably connected to the turntable 1 at one end, and a light source component 4 provided inside the heat dissipation component 3. The height adjustment member 2 is provided with an adjustment hole 21. Part of the heat dissipation component 3 is disposed in the adjustment hole 21 and can reciprocate in the adjustment hole 21 to adjust the relative height between the heat dissipation component 3 and the turntable 1. The heat dissipation component 3 can reciprocate in the adjustment hole 21 on the height adjustment member 2, so that the overall height of the downlight is adjustable to adapt to mounting brackets of different heights. Compared with existing downlights, the downlight of the present invention has higher compatibility.

[0063] Specifically, the downlight further includes a first fastener (not shown), which is used to securely connect the heat dissipation assembly 3 to the adjustment hole 21. Optionally, the first fastener may be, but is not limited to, a bolt. The first fastener passes through the adjustment hole 21, the heat dissipation assembly 3, and the turntable 1, and is then connected to a nut, thereby securing the heat dissipation assembly 3 to the adjustment hole 21 and also enabling a rotational connection between one end of the height adjustment member 2 and the turntable 1. It is understood that, depending on actual circumstances, other connection methods may be used to achieve a rotational connection between one end of the height adjustment member 2 and the turntable 1, and the present invention is not limited thereto.

[0064] Further, see Figure 2 As a specific embodiment of the downlight provided by the present invention, the heat dissipation assembly 3 includes a first heat dissipation member 31 connected to the height adjustment member 2, and a second heat dissipation member 32 connected to the end of the first heat dissipation member 31 away from the turntable 1, and the light source assembly 4 is arranged in the first heat dissipation member 31.

[0065] Specifically, see Figure 2 、 Figure 7 and Figure 8 The first heat sink 31 defines a housing cavity 3111. The light source assembly 4 includes a COB (Chip On Board) light source 52, a light source bracket 43, a lens 44, and a reflective cup 45, which are respectively arranged in the housing cavity 3111. The COB light source 42 is arranged at the bottom of the housing cavity 3111 and can emit light toward the opening of the housing cavity 3111. The light source bracket 43 is arranged on the side of the COB light source 42 away from the bottom of the housing cavity 3111 and is used to fix the COB light source 42 at the bottom of the housing cavity 3111. The lens 44 is arranged on the side of the light source bracket 43 away from the COB light source 42 and is used to focus light. The reflective cup 45 is arranged on the side of the lens 44 away from the light source bracket 43 and is used to improve the light output rate. Compared with traditional downlights, the downlight of the present invention has better light focusing intensity and light extraction rate.

[0066] Specifically, the lens 44 includes a light-collecting portion 441 positioned adjacent to the reflector 45 for focusing light. The reflector 45 is hollow, with its diameter gradually increasing from the lens 44 toward the turntable 1. The reflector 45 covers the lens 44, allowing the light-collecting portion 441 of the lens 44 to be contained within the cavity of the reflector 45. In this embodiment, the lens 44 is relatively small, while the reflector 45 has a certain depth. The depth of the cavity of the reflector 45 is greater than the height of the light-collecting portion 441 of the lens 44. This allows the reflector 45 to completely contain the light-collecting portion 441 within the cavity of the reflector 45, effectively improving light extraction efficiency. In this embodiment, the height of the reflector 45 is between 20 mm and 60 mm, while the height of the lens 44 is between 10 mm and 30 mm. The height of the reflector 45 is greater than that of the lens 44. For example, the height of the reflector 45 is 40 mm, while the height of the lens 44 is 20 mm.

[0067] Specifically, since the diameter of the reflector 45 gradually increases from the lens 44 toward the turntable 1, the wall thickness of the reflector 45 can be, but is not limited to, 1.0 mm, as long as the wall thickness of the reflector 45 is greater than 0.8 mm. Furthermore, the reflector 45 covers the lens 44, so that heat generated by the COB light source 42 during operation flows to the rim of the reflector 45 and swirls there. To address the heat dissipation issue, the reflector 45 is preferably made of a metal material such as alloy aluminum or iron. These metal materials have good thermal conductivity, facilitating heat transfer from the reflector 45 to the first heat sink 31, thereby reducing the temperature within the reflector 45, the lens 44, and the accommodating cavity 3111 of the first heat sink 31. It is worth noting that the reflector 45 should be as thin as possible to achieve improved heat dissipation while also reducing costs.

[0068] Specifically, the downlight of the present invention also includes a second fastener (not shown) for installing the light source assembly 4 in the first heat sink 31. The lens 44, the light source bracket 43, the light source, the first heat sink 31 and the second heat sink 32 are connected together by the same second fastener. The second fastener can be but is not limited to a bolt.

[0069] Preferably, the COB light source 42 has poor pressure resistance. In order to prevent the COB light source 42 from being damaged due to extrusion, a gasket 8 can be set between the bottom of the accommodating cavity 3111 and the COB light source 42. The gasket 8 is elastic, so the gasket 8 can act as a buffer to prevent the COB light source 42 from being damaged by extrusion.

[0070] Specifically, see Figures 7 and 8The lens 44 is recessed toward the light source bracket 43 and is provided with at least two mounting portions 442. A mounting groove 431 is provided on the mounting bracket for embedding the mounting portion 442. A light source groove 434 is provided on the side of the light source bracket 43 away from the lens 44 for placing the COB light source 42. A first mounting hole 443 is provided on the mounting portion 442, and a second mounting hole 433 is provided at the bottom of the mounting groove 431. A third mounting hole 3113 is provided at the bottom of the accommodating cavity 3111 of the first heat dissipation member 31, and a fourth mounting hole 3221 is provided on the second heat dissipation member 32. The second fastener passes through the first mounting hole 443, the second mounting hole 433, and the third mounting hole 3113 in sequence and is threadedly connected to the fourth mounting hole 3221, thereby connecting the lens 44, the light source bracket 43, the COB light source 42, the first heat dissipation member 31 and the second heat dissipation member 32 together. It is understandable that, depending on the actual situation, the second fastener can also be passed through the first mounting hole 443, the second mounting hole 433, the third mounting hole 3113 and the fourth mounting hole 3221 in sequence and then threadedly connected to the nut, thereby connecting the lens 44, the light source bracket 43, the COB light source 42, the first heat sink 31 and the second heat sink 32 together.

[0071] Optionally, the lens 44 and the light source bracket 43 are both made of plastic. In order to simplify the assembly steps, the lens 44 and the mounting bracket can be an integrally molded part. The specific material can be selected according to the power and temperature rise of the downlight. For example, high-temperature resistant polycarbonate (PC) material can be selected.

[0072] Alternatively, the lens 44 and the light source bracket 43 may be separately injection molded, with the lens 44 and the light source bracket 43 being made of a plastic material. The specific material can be selected based on the power and temperature rise of the downlight, for example, high-temperature resistant polycarbonate can be used. In this embodiment, the light source bracket 43 is made of a light-shielding material to prevent light loss, and the lens 44 is made of a transparent material.

[0073] Optionally, the adjustment hole 21 may be a waist-shaped hole extending from one end thereof close to the turntable 1 toward one end thereof close to the heat dissipation assembly 3. It is understood that the shape of the adjustment hole 21 may be appropriately modified according to actual circumstances, and the present invention is not limited thereto.

[0074] Further, see Figure 2 As a specific embodiment of the downlight provided by the present invention, the first heat dissipation member 31 includes a main body 311 having an accommodating cavity 3111, and protrusions 312 respectively provided on opposite sides of the main body 311. The third mounting hole 3113 is provided on the main body 311, and the protrusion 312 is interference fit in the corresponding adjustment hole 21, and the protrusion 312 can reciprocate in the adjustment hole 21 along its length direction.

[0075] Preferably, the turntable 1 is rotatably connected to the height adjustment members 2 on both sides thereof, and a slider 3121 is provided on the side of the protrusion 312 away from the main body 311, that is, the heat dissipation assembly 3 is provided with sliders 3121 on both sides thereof, and the sliders 3121 are embedded in the corresponding adjustment holes 21 of the height adjustment members 2 and can move back and forth in the adjustment holes 21.

[0076] Specifically, the first fastener is inserted from the side of the slider 3121 away from the protrusion 312, sequentially through the adjustment hole 21, the slider 3121, and the protrusion 312, and then connected to the nut, thereby achieving an interference fit of the protrusion 312 within the corresponding adjustment hole 21. When the slider 3121 slides within the adjustment hole 21, the heat dissipation assembly 3 also slides along the length of the adjustment hole 21, thereby changing the distance between the heat dissipation assembly 3 and the turntable 1, thereby changing the height of the downlight. It is understood that other methods can be used to achieve the sliding connection between the protrusion 312 and the adjustment hole 21, depending on the actual situation, and the present invention is not limited thereto.

[0077] Further, see Figure 1 、 Figure 2 as well as Figure 6 The turntable 1 has a hollow cavity 11, and one end of the main body 311 away from the second heat sink 32 extends into the hollow cavity 11. A relief notch 12 is provided on the side wall of the turntable 1 to avoid interfering with the rotation of the first heat sink 31. Accordingly, the side of the second heat sink 32 corresponding to the relief notch 12 is cut away so that the shape of the side of the second heat sink 32 corresponding to the relief notch 12 matches the relief notch 12 to avoid interfering with the rotation of the second heat sink 32. In this embodiment, Figure 4 and Figure 5 As shown, when the height adjustment member 2 drives the first heat sink 31 and the second heat sink 32 to rotate relative to the turntable 1, an avoidance notch 12 is provided on the turntable 1, and the shape of the side of the second heat sink 32 corresponding to the avoidance notch 12 is matched with the avoidance notch 12, so as to avoid interference with the rotation of the first heat sink 31 and the second heat sink 32.

[0078] Further, see Figures 2 to 5 A first limiting portion 22 is provided on one side of the height adjusting member 2 for abutting against the side wall of the avoidance gap 12, and a second limiting portion 13 is provided on the turntable 1 for abutting against the side of the height adjusting member 2 away from the first limiting portion 22. By setting the first limiting portion 22 and the second limiting portion 13, the rotation angle of the height adjusting member 2 can be limited.

[0079] Optionally, the rotation angle range of the height adjustment member 2 relative to the central axis of the turntable 1 is -15° to 30°, and the rotation angle range of the first heat sink 31 relative to the central axis of the turntable 1 is 0° to 45°. On the basis of ensuring the adjustable range of the illumination angle of the downlight, the volume of the side of the second heat sink 32 corresponding to the avoidance notch 12 is reduced, thereby retaining sufficient volume of the second heat sink 32 for heat dissipation.

[0080] Further, see Figure 2 The downlight also includes a face ring 5 mounted on the outside of the turntable 1, and the face ring 5 can rotate relative to the turntable 1, wherein the face ring 5 is used to be detachably connected to the mounting bracket of the downlight. Since the face ring 5 can rotate relative to the turntable 1, after the face ring 5 is set on the mounting bracket, the turntable 1 can be rotated relative to the face ring 5 to adjust the illumination angle of the downlight.

[0081] Optionally, an annular groove 14 is provided on the outer side of the turntable 1, and a plurality of spring plates 51 are provided on the inner wall of the face ring 5 along its circumference, which are locked in the annular groove 14. The spring plates 51 tightly abut against the annular groove 14, thereby setting the face ring 5 on the turntable 1 and enabling the face ring 5 to rotate relative to the turntable 1. It is understood that other methods can be used to enable the face ring 5 to rotate relative to the turntable 1 according to actual circumstances, and the present invention is not limited thereto.

[0082] Specifically, two annular ridges are provided on the outer wall of the turntable 1 at intervals, and the area between the two annular ridges is the annular groove 14. The inner wall of the face ring 5 is also provided with a first limiting protrusion 52 for preventing the face ring 5 from separating from the turntable 1. The end face of the first limiting protrusion 52 away from the heat dissipation component 3 abuts on the end face of the annular ridge of the turntable 1 close to the heat dissipation component 3, thereby preventing the face ring 5 from separating from the turntable 1.

[0083] Specifically, the downlight further includes a pressure ring 6 disposed at the end of the heat dissipation assembly 3 near the turntable 1. The pressure ring 6 is specifically disposed at the end of the first heat dissipation element 31 near the turntable 1. A second limiting protrusion 61 is provided along its circumference on the inner wall of the pressure ring 6. The end of the second limiting protrusion 61 near the first heat dissipation element 31 abuts against the end of the reflective cup 45 near the turntable 1, thereby securing the light source assembly 4 within the accommodating cavity 3111 of the first heat dissipation element 31. Furthermore, the pressure ring 6 is entirely black, and a tooth-like microstructure is provided along its circumference on the inner wall of the pressure ring 6 for anti-glare. The tooth-like microstructure is specifically located on the side of the second limiting protrusion 61 near the turntable 1, thereby providing an anti-glare effect.

[0084] Optionally, the pressure ring 6 and the first heat sink 31 are detachably connected, and specifically, the connection may not be limited to a threaded connection. For example, an internal thread may be provided on the pressure ring 6, and an external thread may be provided on the first heat sink 31 to match the internal thread, thereby achieving a threaded connection between the pressure ring 6 and the first heat sink 31. It is understood that, depending on the actual situation, the pressure ring 6 and the first heat sink 31 may be detachably connected in other ways.

[0085] Further, see Figure 2 and Figure 6 The downlight also includes a decorative piece 7 that is detachably mounted on the inner side of the turntable 1. The decorative piece 7 is specifically ring-shaped. According to different customer needs, the decorative piece 7 of different colors can be replaced on the inner side of the turntable 1. When the first heat sink 31 slides in the adjustment hole 21 in a direction away from the turntable 1, the light emitted by the COB light source 42 through the reflective cup 45 and the lens 44 will hit the decorative piece 7, and the decorative pieces 7 of different colors will reflect or refract light of different colors, thereby creating different atmospheres to meet customer needs.

[0086] Preferably, in order to further improve the anti-glare effect, a tooth-like microstructure for anti-glare can be provided on the inner side of the decorative part 7, thereby avoiding visual discomfort and visual conditions that reduce the visibility of objects, and greatly improving the user experience.

[0087] Specifically, the decorative part 7 is provided with an avoidance protrusion 71 for avoiding the rotating connection structure between the height adjustment part 2 and the turntable 1, and the avoidance protrusion 71 is provided with a card slot 72. The turntable 1 is provided with a buckle 15, and the buckle 15 is correspondingly engaged with the card slot 72, thereby realizing a detachable connection between the turntable 1 and the decorative part 7.

[0088] Further, see Figure 8 To improve the heat dissipation efficiency of the second heat sink 32, the second heat sink 32 is shaped like a dendrite. Specifically, the second heat sink 32 includes a central portion 321, at least three trunk portions 322 extending from the central portion 321, and at least one branch portion 323 extending from the trunk portion 322 to opposite sides. A boss 3211 is provided at one end of the central portion 321 near the first heat sink 31, and a fourth mounting hole 3221 is provided in the trunk portion 322. The thickness of the trunk portion 322 gradually decreases from the central portion 321 toward the periphery, thereby reducing the weight of the second heat sink 322 to 320g. In this embodiment, the second heat sink 32 includes a central portion 321, six trunk portions 322 extending evenly from the central portion 321, and at least two branches 323 extending from the side of the trunk portion 322. It is understood that the number of central portions 321, trunk portions 322, and branches 323 can be adjusted appropriately and is not limited by the present invention.

[0089] Specifically, to ensure the heat dissipation efficiency of the second heat sink 32, multiple ribs 3231 can be provided on opposite sides of the branch 323. This creates a wavy shape on the side surfaces of the branch 323, thereby increasing the heat dissipation area of ​​the side surfaces of the branch 323 and significantly improving the heat dissipation intensity. In this embodiment, to facilitate natural convection between adjacent branches 323, the spacing between the ribs 3231 on two adjacent branches 323 can be set to be greater than or equal to 5 mm, further improving heat dissipation efficiency while further reducing the weight of the second heat sink 32.

[0090] In the downlight of the embodiment of the present invention, the height of the second heat sink 32 can be increased to improve heat dissipation efficiency. However, due to the height limitation of the entire lamp, the height of the second heat sink 32 is preferably set to 50 mm to 70 mm. For example, the height of the second heat sink 32 is 63 mm. In addition, to increase the heat dissipation area, the diameter of the second heat sink 32 can be increased. However, due to the rotation angle limitation of the heat dissipation assembly 3, the diameter of the second heat sink 32 is preferably set to be 10 mm to 30 mm larger than the diameter of the first heat sink 31. For example, the diameter of the second heat sink 32 is 20 mm larger than the diameter of the first heat sink 31.

[0091] Further, see Figure 8 The bottom of the accommodating cavity 3111 of the first heat sink 31 is provided with a hollow groove 3112. The end of the second heat sink 32, adjacent to the first heat sink 31, is provided with a boss 3211 embedded within the hollow groove 3112. Specifically, the boss 3211 forms part of the bottom surface of the accommodating cavity 3111 and contacts the gasket 8, thereby reducing the thermal resistance path and providing excellent heat conduction. The COB light source 42 can transfer heat to the second heat sink 32 through the gasket 8 and the boss 3211. In this embodiment, the thickness of the boss 3211 is equal to the thickness of the bottom surface of the accommodating cavity 3111. The gasket 8 is made of a thermally conductive insulating material, specifically, but not limited to, a thermally conductive silicone sheet. The area of ​​the thermally conductive silicone sheet is larger than that of the COB light source 42.

[0092] Specifically, a gasket groove 432 is provided on the side of the light source bracket 43 away from the lens 44, wherein the light source groove 434 is provided at the bottom of the gasket groove 432, and the depth of the gasket groove 432 is 70% to 80% of the thickness of the gasket 8, so that when the second fastener is used to connect the lens 44, the light source bracket 43, the light source, the gasket 8, the first heat sink 31 and the second heat sink 32 together, the gasket 8 can be compressed by 20% to 30%, making the overall structure compact.

[0093] Furthermore, according to the operating power of the downlight, suitable materials for the first heat sink 31 and the pressure ring 6 are selected. When the operating power of the downlight is relatively high, in order to ensure better heat dissipation performance, the first heat sink 31 and the pressure ring 6 are preferably made of metal, specifically but not limited to die-cast aluminum; when the operating power of the downlight is relatively low, the first heat sink 31 and the pressure ring 6 are preferably made of ordinary plastic, thereby reducing production costs. Since the downlight of the present invention mainly dissipates heat through the second heat sink 32, in order to ensure better heat dissipation performance, the second heat sink 32 is made of metal, specifically but not limited to aluminum extrusion. Through the above-mentioned arrangement, the downlight of the present invention has better heat dissipation performance, so that the operating power of the downlight of the present invention can be increased to 40W or above. In addition, the temperature rise of the COB light source 42 is less than 90°C, thereby avoiding the problem of untimely heat dissipation.

[0094] The above descriptions are merely optional embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A downlight, characterized in that: include: Turntable; A height adjustment member, one end of which is rotatably connected to the turntable, and an adjustment hole is provided on the height adjustment member; a heat dissipation assembly disposed at one end of the turntable, with a portion of the heat dissipation assembly passing through the adjustment hole and capable of reciprocating in a vertical direction parallel to the central axis of the turntable within the adjustment hole to adjust the relative height between the heat dissipation assembly and the turntable; wherein the height refers to the dimension in a direction parallel to the central axis of the turntable; and A light source assembly is provided in the heat dissipation assembly; The heat dissipation assembly includes a first heat dissipation member connected to the height adjustment member, and a second heat dissipation member connected to an end of the first heat dissipation member away from the turntable, and the light source assembly is arranged in the first heat dissipation member; The first heat dissipation member includes a main body and protrusions provided on opposite sides of the main body, wherein the protrusions are interference-fitted into the corresponding adjustment holes; The turntable has a hollow cavity, and one end of the main body away from the second heat sink extends into the hollow cavity. The turntable is provided with an avoidance notch, and the avoidance notch is used to avoid interference with the rotation of the first heat sink; The shape of the side of the second heat dissipation member corresponding to the avoidance notch matches the avoidance notch to avoid interfering with the rotation of the second heat dissipation member; The rotation angle range of the height adjustment member relative to the central axis of the turntable is -15° to 30°.

2. The downlight according to claim 1, characterized in that The height adjustment members are rotatably connected to opposite sides of the turntable, and sliders are provided on opposite sides of the heat dissipation assembly. The sliders are embedded in the corresponding adjustment holes of the height adjustment members and can move back and forth in the adjustment holes.

3. The downlight according to claim 1, wherein: The adjustment hole is a waist-shaped hole, and the waist-shaped hole extends from one end close to the turntable toward one end close to the heat dissipation component.

4. The downlight according to claim 1, wherein: The downlight further includes a first fastener, which is used to fix the protrusion in the adjustment hole.

5. The downlight according to claim 1, wherein: The rotation angle range of the heat dissipation component relative to the central axis of the turntable is 0° to 45°.

6. The downlight according to any one of claims 1 to 5, characterized in that: The downlight further comprises a face ring sleeved outside the turntable, and the face ring can rotate relative to the turntable.

7. The downlight according to claim 6, characterized in that An annular groove is provided on the outer side of the turntable, and a plurality of spring pieces that are clamped in the annular groove are provided on the inner wall of the face ring along its circumference. A first limiting protrusion for preventing the face ring from detaching from the turntable is also provided on the inner wall of the face ring.

8. The downlight according to any one of claims 1 to 5, characterized in that: The downlight further comprises a decorative piece detachably sleeved on the inner side of the turntable, and a pressure ring provided at one end of the heat dissipation assembly close to the turntable, wherein a tooth-shaped microstructure for preventing glare is provided on the inner side of the pressure ring.

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