Lamp and driving device thereof
Patent Information
- Application Number
- CN202522075002.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-26
- Publication Date
- 2026-09-15
- Estimated Expiration
- 2035-09-26
AI Technical Summary
[0005]本申请的目的在于提供一种灯具及其驱动装置，旨在解决灯具的组装生产效率低的问题
在本申请实施例的驱动装置中，壳体与壳盖之间通过第一勾挂部与第二勾挂部相互勾挂连接，使得两者快速且稳定的盖合完成。这样，驱动装置的壳体与壳盖之间不再需要进行锁螺钉的工序，手动即可完成装配，组装效率高。然后将驱动装置通过多个螺钉分别连接至灯具的灯壳上，以将驱动装置固定安装至灯具上。如此，灯具的整个组装过程减少了驱动装置的壳体与壳盖之间的锁螺钉工序，有利于提高组装生产灯具的效率。进一步的，壳体的侧壁的内侧设有间隔的多个第一凹槽，并且，电路板的周向边缘避让开第一凹槽。如此，在通过通孔向容纳空间内进行灌胶的过程中，胶水能够通过第一凹槽流动向壳体的顶壁，继续灌胶，则胶水能够快速地完成包裹电路板，然后静置等待胶水固化即可。这样便提高了灌胶效率，有利于提高组装生产灯具的效率。
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Figure CN224756925U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of lighting equipment technology, and in particular relates to a lighting fixture and its driving device. Background Technology
[0002] Currently, the driving device used in high-domed lighting fixtures is generally installed on the back plate of the lamp housing, therefore, the driving device has an independent housing.
[0003] The drive unit's housing includes a casing and a cover. The cover is secured to the casing with multiple screws to encapsulate the circuit board inside the casing. The entire drive unit is then secured to the back panel of the lamp housing with multiple screws. The entire assembly process of the lamp involves at least two screw-locking steps, which affects the assembly and production efficiency of the lamp.
[0004] In addition, the interior of the drive unit needs to be potted with adhesive to encapsulate the circuit board, reducing the possibility of short circuit damage caused by contact with moisture. However, due to the compact structure of the drive unit, the circumferential edge of the circuit board is generally in contact with the side wall of the housing. This makes it difficult for the adhesive to flow and encapsulate the circuit board during potting, resulting in low potting efficiency and affecting the assembly and production efficiency of the lamps. Utility Model Content
[0005] The purpose of this application is to provide a lamp and its driving device, which aims to solve the problem of low assembly and production efficiency of lamps.
[0006] To achieve the above objectives, according to the first aspect of this application, the technical solution adopted by this application is: a driving device for driving a light source assembly of a lamp, the driving device including a housing, a circuit board and a cover, the housing having a receiving space and an opening communicating with the receiving space, the circumferential edge of the opening having a plurality of spaced first hook portions, the inner side of the side wall of the housing having a plurality of spaced first grooves, the first grooves extending along the direction from the opening to the top wall of the housing opposite to it, and the first grooves extending to the top wall, the circuit board being suspended in the receiving space, the circuit board avoiding the first grooves, the circuit board being electrically connected to the light source assembly, the cover closing to the opening, the cover having a plurality of second hook portions, the plurality of second hook portions being hooked and connected to the plurality of first hook portions one by one, the cover also having a through hole communicating with the receiving space, the through hole being used to pot glue into the receiving space.
[0007] In some embodiments, the drive device further includes insulating paper disposed in the receiving space and abutting against the top wall and the side wall of the housing, and the insulating paper avoids the first groove, and the circuit board is disposed in the space enclosed by the insulating paper.
[0008] In some embodiments, the inner side of the top wall is provided with a plurality of spaced second grooves, the plurality of second grooves being radially distributed around the center point of the top wall, and the second grooves extending to the side wall of the housing.
[0009] In some embodiments, the housing is provided with a plurality of mounting holes for screws to pass through for connection to the lamp housing of the lamp, and a plurality of first hooks are arranged adjacent to the plurality of mounting holes in a one-to-one correspondence.
[0010] In some embodiments, the circuit board is provided with an adjustment component, the side wall of the housing is provided with a window communicating with the receiving space, the adjustment component is directly opposite the window, and the drive device further includes a cover that is removably closed to the window.
[0011] In some embodiments, the drive device further includes a seal, the adjustment component includes an operating button, the seal is sleeved on the adjustment component, the operating button passes through the seal, and the seal is disposed between the adjustment component and the circumferential edge region of the window for sealing.
[0012] In some embodiments, the window has a connected first annular protrusion and a second annular protrusion. The first annular protrusion protrudes radially inward from the circumferential wall of the window, and the second annular protrusion protrudes from the first annular protrusion in a direction away from the receiving space. The second annular protrusion and the circumferential wall of the window are spaced apart to form an annular groove. The cover includes a cover body and a first cover portion and a second cover portion connected to the same side of the cover body. The first cover portion and the second cover portion are spaced apart. The first cover portion is engaged in the annular groove, and the second cover portion has a hook that hooks onto the side of the first annular protrusion away from the second annular protrusion.
[0013] In some embodiments, the cover has a plurality of spaced circumferential protrusions that abut against a first annular protrusion and / or a second annular protrusion.
[0014] In some embodiments, the cap is a one-piece molded component.
[0015] According to a second aspect of this application, a lighting fixture is provided. The lighting fixture includes a light source assembly and a driving device as described above, wherein the circuit board of the driving device is electrically connected to the light source assembly.
[0016] This application has at least the following beneficial effects: In the driving device of this application embodiment, the housing and the cover are connected by a first hook and a second hook, allowing for quick and stable sealing. This eliminates the need for screw fastening between the housing and cover, enabling manual assembly and high efficiency. The driving device is then connected to the lamp housing using multiple screws to secure it to the lamp. This reduces the screw fastening process between the housing and cover, improving the efficiency of lamp assembly. Furthermore, the inner sidewall of the housing has multiple spaced first grooves, and the circumferential edge of the circuit board avoids these grooves. During the potting process through the through-hole into the receiving space, the adhesive flows through the first grooves to the top wall of the housing, allowing for rapid encapsulation of the circuit board. The adhesive then cures. This improves potting efficiency and further enhances the efficiency of lamp assembly. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a front view schematic diagram of a driving device according to an embodiment of this application; Figure 2 for Figure 1 A schematic diagram of the drive unit from the left side is shown; Figure 3 for Figure 1 Schematic diagram of the three-dimensional structure of the drive device shown Figure 1 ; Figure 4 for Figure 3 An exploded view of the drive unit is shown, in which the drive unit has been potted with glue; Figure 5 for Figure 1 Schematic diagram of the three-dimensional structure of the drive device shown Figure 2 ; Figure 6 for Figure 5 An exploded view of the drive unit is shown, in which the drive unit has been potted with glue; Figure 7 for Figure 1 Schematic diagram of the three-dimensional structure of the drive device shown Figure 3 ; Figure 8 for Figure 7An exploded view of the drive unit is shown, in which the drive unit is not potted; Figure 9 for Figure 1 Schematic diagram of the three-dimensional structure of the drive device shown Figure 4 ; Figure 10 for Figure 9 An exploded view of the drive unit is shown, in which the drive unit is not potted; Figure 11 for Figure 1 Cross-sectional view along the AA direction; Figure 12 for Figure 11 Enlarged view of point D in the middle; Figure 13 for Figure 2 Cross-sectional view along the middle BB direction; Figure 14 for Figure 1 Cross-sectional view along the CC direction; Figure 15 for Figure 14 Enlarged view of point E in the middle; Figure 16 This is a schematic diagram of the housing of the drive device according to an embodiment of this application.
[0019] The figures in the diagram are labeled as follows: 10. Shell; 11. Accommodation space; 12. Opening; 13. First hook; 14. Window; 141. First annular protrusion; 142. Second annular protrusion; 143. Annular groove; 15. Mounting hole; 16. First groove; 17. Second groove; 18. Hanging connector; 19. Top wall; 20. Circuit board; 21. Adjustment component; 211. Control button; 30. Shell cover; 31. Second hook part; 32. Through hole; 40. Cap; 41. Cap body; 42. First cap fitting part; 43. Second cap fitting part; 431. Hook; 44. Circumferential protrusion; 50. Insulating paper; 61. First wire; 62. Second wire; 63. Rubber stopper; 64. Set screw; 65. Glue block; 70. Sealing components. Detailed Implementation
[0020] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.
[0021] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0022] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.
[0023] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0024] According to a first aspect of this application, the driving device provided in the embodiments of this application is used to drive the light source assembly of a lamp.
[0025] like Figures 1 to 10 , Figure 14 and Figure 15As shown, the drive device includes a housing 10, a circuit board 20, and a cover 30. The housing 10 has a receiving space 11 and an opening 12 communicating with the receiving space 11. The circumferential edge of the opening 12 is provided with a plurality of spaced first hook parts 13. The inner side of the side wall of the housing 10 is provided with a plurality of spaced first grooves 16. The first grooves 16 extend from the opening 12 to the top wall 19 of the housing 10 opposite to it, and the first grooves 16 extend to the top wall 19. The circuit board 20 is suspended in the receiving space 11, and the circuit board 20 avoids the first grooves 16. The circuit board 20 is electrically connected to the light source assembly. The cover 30 closes the opening 12. The cover 30 is provided with a plurality of second hook parts 31. The plurality of second hook parts 31 are hooked and connected to the plurality of first hook parts 13 one by one. The cover 30 is also provided with a through hole 32 communicating with the receiving space 11. The through hole 32 is used to inject glue into the receiving space 11. The drive unit is electrically connected to an external power source via a first wire 61, wherein the connector of the first wire 61 is sealed and fitted onto the housing 10, and the first wire 61 extends into the receiving space 11 and is electrically connected to the circuit board 20.
[0026] In the driving device of this application embodiment, the housing 10 and the cover 30 are connected by a one-to-one hooking connection between the first hook part 13 and the second hook part 31, allowing the housing 10 and the cover 30 to be quickly and stably closed. Thus, compared to driving devices currently on the market, the driving device provided in this application embodiment eliminates the need for screw fastening between the housing 10 and the cover 30; the first hook part 13 and the second hook part 31 can be manually hooked one-to-one to complete the assembly, improving the assembly efficiency of the housing 10 and the cover 30. The driving device is then connected to the back plate of the lamp housing using multiple screws to fix the driving device to the lamp. Furthermore, the second wire 62 connected to the circuit board 20 passes through the cover 30 and extends into the interior of the lamp to electrically connect with the light source assembly. Therefore, the entire assembly process of the lamp reduces the screw fastening process between the housing 10 and the cover 30 of the driving device, which is beneficial for improving the efficiency of lamp assembly production. Furthermore, the inner sidewall of the housing 10 is provided with a plurality of spaced first grooves 16, and the circumferential edge of the circuit board 20 avoids the first grooves 16. Thus, during the process of potting adhesive into the receiving space 11 through the through-hole 32, the adhesive can flow through the first grooves 16 to the top wall 19 of the housing 10 and penetrate between the top wall 19 and the circuit board 20. Continuing the potting process, the adhesive can quickly coat the circuit board 20. Then, the process is allowed to stand and solidify into a gel block 65 coating the circuit board 20, thereby improving potting efficiency and increasing the efficiency of assembling and producing lamps. After potting is complete, the through-hole 32 is sealed with a glue plug 63.
[0027] The circuit board 20 is secured to the top wall 19 of the housing 10 with screws, and the circuit board 20 is suspended relative to the top wall 19. Specifically, the top wall 19 has multiple support pillars protruding towards the circuit board 20. The circuit board 20 is secured to the support pillars with screws, thus allowing the circuit board 20 to be suspended within the receiving space 11. In this drive device, the housing 10 can be made of metal materials such as aluminum or iron to ensure the structural strength of the housing 10. The circuit board 20 uses an insulating substrate to ensure insulation between the integrated circuit of the circuit board 20 and the support pillars (i.e., the housing 10). Furthermore, the cover 30 can be made of metal materials such as aluminum or iron to ensure the structural strength of the cover 30.
[0028] To further prevent electric arcing between the circuit board 20 and the aluminum housing 10, such as Figure 4 , Figure 6 , Figure 8 , Figure 10 and Figure 13 As shown, the driving device provided in the embodiments of this application further includes insulating paper 50. The insulating paper 50 is disposed in the receiving space 11 and abuts against the top wall 19 and the side wall of the housing 10. The circuit board 20 is disposed within the space enclosed by the insulating paper 50. That is, the circuit board 20 and the housing 10 are separated by the insulating paper 50 for further insulation, thereby effectively blocking the path of arc generation and reducing the possibility of arc generation. Furthermore, the insulating paper 50 avoids the first groove 16. During the potting process, the glue fills the space between the insulating paper 50 and the inner wall of the housing 10, and the glue flows along the first groove 16 to the space between the top wall 19 and the insulating paper 50 opposite it. After the glue overflows the insulating paper 50 toward the opening end of the housing cover 30, the glue continues to fill the space enclosed by the insulating paper 50 and wrap the circuit board 20. Thus, after the adhesive cures, it not only wraps the circuit board 20, but also the insulating paper 50, thereby further improving the insulation performance between the circuit board 20 and the housing 10. In addition, the adhesive wrapping of the circuit board 20 can prevent moisture that has seeped into the containment space 11 from contacting the circuit board 20, thus preventing the circuit board 20 from being damaged by short circuit.
[0029] like Figure 16 As shown, in this driving device, the inner side of the top wall 19 is provided with a plurality of spaced second grooves 17, which are radially distributed around the center point of the top wall 19 and extend to the side wall of the housing 10. Thus, during the glue-filling process, when the glue flows along the first groove 16 to the top wall 19, the glue continues to flow along the second grooves 17, allowing the glue to quickly fill the gap between the top wall 19 and the opposite insulating paper 50, improving glue-filling efficiency.
[0030] like Figures 3 to 6 , Figures 14 to 16As shown, the housing 10 of the drive device has multiple mounting holes 15 for screws to pass through and connect to the lamp housing of the lamp. Multiple first hook portions 13 are arranged adjacent to each of the mounting holes 15 in a one-to-one correspondence. In this embodiment, the positions of the multiple first hook portions 13 are determined based on the positions of the mounting holes 15 on the housing 10, so that the multiple first hook portions 13 are designed to fit the contour shape of the housing 10, thereby rationally distributing the multiple first hook portions 13.
[0031] In the driving device provided in the embodiments of this application, the first hook portion 13 provided on the housing 10 can be a hook hole, and the second hook portion 31 provided on the cover 30 can be a barb structure, with the barb structure passing through the hook hole and hooking with each other. Alternatively, in some embodiments, the first hook portion 13 provided on the housing 10 can be a barb structure, and the second hook portion 31 provided on the cover 30 can be a hook hole.
[0032] like Figure 4 , Figure 6 , Figure 8 , Figures 10 to 12 As shown, the circuit board 20 is equipped with an adjustment component 21, and the side wall of the housing 10 is provided with a window 14 communicating with the receiving space 11. The adjustment component 21 is directly opposite to and exposed through the window 14. The output mode of the circuit board 20 can be adjusted through the adjustment component 21, thereby enabling the adjustment of the luminous power, luminous color temperature, and other aspects of the light source component according to the lighting requirements of the lighting fixture application site. The driving device also includes a cover 40, which is detachably fitted onto the window 14, i.e., the cover 40 covers and protects the adjustment component 21, reducing the possibility of accidental contact with the adjustment component 21.
[0033] And, as Figure 4 , Figure 6 , Figure 8 , Figures 10 to 12 As shown, the drive device also includes a seal 70. The adjusting component 21 includes an operating button 211. The seal 70 is sleeved on the adjusting component 21, and the operating button 211 passes through the seal 70, that is, the operating button 211 protrudes from the window 14 and is exposed in the window 14. The seal 70 is disposed between the adjusting component 21 and the circumferential edge area of the window 14 for sealing. Thus, during the glue pouring process, when the glue flows along the first groove 16 to the top wall 19, the seal 70 between the adjusting component 21 and the circumferential edge area of the window 14 achieves a sealing setting, thereby preventing the glue from leaking from the gap between the adjusting component 21 and the circumferential edge area of the window 14.
[0034] like Figure 11 and Figure 12As shown, in this driving device, the window 14 is provided with a first annular protrusion 141 and a second annular protrusion 142 connected together. The first annular protrusion 141 protrudes radially inward from the circumferential wall of the window 14, and the second annular protrusion 142 protrudes from the first annular protrusion 141 in a direction away from the receiving space 11. The second annular protrusion 142 and the circumferential wall of the window 14 are spaced apart to form an annular groove 143. Correspondingly, the cover 40 includes a cover body 41 and a first cover portion 42 and a second cover portion 43 connected to the same side of the cover body 41. The first cover portion 42 and the second cover portion 43 are spaced apart. When the cover 40 is closed onto the window 14, the first closing part 42 is engaged in the annular groove 143, and the second closing part 43 has a hook 431. The hook 431 is hooked onto the side of the first annular protrusion 141 opposite to the second annular protrusion 142. This makes the cover 40 and the circumferential wall of the window 14 tightly joined to achieve a good sealing effect, thereby effectively preventing moisture and debris from the external environment from contacting the operating button 211 of the adjusting component 21.
[0035] To further improve the sealing effect between the cover 40 and the circumferential wall of the window 14, such as Figure 12 As shown, the cover 40 has a plurality of spaced circumferential protrusions 44, which abut against the first annular protrusion 141 and / or the second annular protrusion 142. In this embodiment, as... Figure 12 As shown, the end face of the first cover portion 42 is provided with at least one circumferential protrusion 44 that abuts against the bottom of the annular groove 143. At the interval between the first cover portion 42 and the second cover portion 43, at least one circumferential protrusion 44 that abuts against the top surface of the second annular protrusion 142 is provided. The second cover portion 43 is provided with at least one circumferential protrusion 44 that abuts against the side surface of the second annular protrusion 142. Furthermore, the hooks 431 and the first annular protrusion 141 are hooked together, causing each circumferential protrusion 44 to be compressed and undergo elastic deformation, thereby improving the sealing effect between the cover 40 and the circumferential wall of the window 14.
[0036] In the driving device of the embodiments of this application, the cover 40 is a one-piece molded component. Furthermore, the cover 40 is preferably made of a flexible material and integrally molded using an injection molding process, for example, using silicone material.
[0037] According to a second aspect of this application, a luminaire is provided. The luminaire includes a light source assembly and a driving device as described above, with the circuit board 20 of the driving device electrically connected to the light source assembly. The luminaire is assembled using the driving device provided in the embodiments of this application. The entire assembly process of the luminaire reduces the screw-locking steps between the housing 10 and the cover 30 of the driving device, which is beneficial to improving the efficiency of luminaire assembly. A hanging joint 18 is provided on the top wall 19 of the housing 10 of the driving device, on the side opposite to the receiving space 11. A hanging rod is screwed to the hanging joint 18 and locked with a set screw 64 to prevent the hanging rod from detaching from the hanging joint 18. The luminaire can then be suspended to the top of the lighting location, such as a ceiling or a steel structure ceiling, using the hanging rod.
[0038] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A driving apparatus for driving a light source assembly of a luminaire, characterized by, The driving device includes: The housing (10) has a receiving space (11) and an opening (12) communicating with the receiving space (11). The circumferential edge of the opening (12) is provided with a plurality of spaced first hooks (13). The inner side of the sidewall of the housing (10) is provided with a plurality of spaced first grooves (16). The first grooves (16) extend in a direction from the opening (12) to the top wall (19) of the housing (10) opposite to it, and the first grooves (16) extend to the top wall (19). The circuit board (20) is suspended in the receiving space (11), the circuit board (20) avoids the first groove (16), and the circuit board (20) is electrically connected to the light source assembly; The cover (30) is closed on the opening (12). The cover (30) is provided with a plurality of second hooks (31). The plurality of second hooks (31) are hooked and connected to the plurality of first hooks (13) in a one-to-one correspondence. The cover (30) is also provided with a through hole (32) communicating with the receiving space (11). The through hole (32) is used to inject glue into the receiving space (11).
2. The driving device according to claim 1, characterized in that, The drive device also includes insulating paper (50), which is disposed in the receiving space (11) and abuts against the top wall (19) and the side wall of the housing (10). The insulating paper (50) avoids the first groove (16), and the circuit board (20) is disposed in the space enclosed by the insulating paper (50).
3. The driving device according to claim 2, characterized in that, The inner side of the top wall (19) is provided with a plurality of second grooves (17) spaced apart. The plurality of second grooves (17) are radially distributed around the center point of the top wall (19) and the second grooves (17) extend to the side wall of the housing (10).
4. The driving device according to any one of claims 1-3, characterized in that, The housing (10) is provided with a plurality of mounting holes (15) for screws to pass through and connect to the lamp housing of the lamp. The plurality of first hooks (13) are arranged adjacent to each other in a one-to-one correspondence with the plurality of mounting holes (15).
5. The driving device according to any one of claims 1-3, characterized in that, The circuit board (20) is provided with an adjustment component (21), and the side wall of the housing (10) is provided with a window (14) communicating with the accommodating space (11). The adjustment component (21) is directly opposite the window (14), and the driving device also includes a cover (40), which is detachably covered by the window (14).
6. The driving device according to claim 5, characterized in that, The drive device also includes a seal (70), the adjustment component (21) includes an operation button (211), the seal (70) is sleeved on the adjustment component (21), the operation button (211) passes through the seal (70), and the seal (70) is disposed between the adjustment component (21) and the circumferential edge area of the window (14) for sealing.
7. The driving device according to claim 5, characterized in that, The window (14) is provided with a first annular protrusion (141) and a second annular protrusion (142) connected together. The first annular protrusion (141) protrudes radially inward from the circumferential wall of the window (14), and the second annular protrusion (142) protrudes from the first annular protrusion (141) in a direction away from the receiving space (11). The second annular protrusion (142) and the circumferential wall of the window (14) are spaced apart to form an annular groove (143). The cover (40) includes a cover body (41) and a first cover part (42) and a second cover part (43) connected to the same side of the cover body (41). The first cover part (42) and the second cover part (43) are spaced apart. The first cover part (42) is fitted into the annular groove (143). The second cover part (43) has a hook (431). The hook (431) is hooked on the side of the first annular protrusion (141) away from the second annular protrusion (142).
8. The driving device according to claim 7, characterized in that, The cover (40) has a plurality of spaced circumferential protrusions (44), which abut against the first annular protrusion (141) and / or the second annular protrusion (142).
9. The driving device according to claim 8, characterized in that, The cap (40) is a one-piece molded component.
10. A luminaire characterized by, It includes a light source assembly and a driving device as described in any one of claims 1-9, wherein the circuit board (20) of the driving device is electrically connected to the light source assembly.