Lighting device

Abstract

The utility model relates to the field of lighting, and particularly provides a lighting device which prevents light rays parallel to the angle of a light source plate from directly entering eyes by utilizing a structure convenient for stable assembly. The lighting device comprises a shell, a lampshade, a light-emitting assembly and a lens, one end of the shell is provided with an opening portion, and the lampshade covers the front side of the opening portion and is fixedly connected with the shell. The light-emitting assembly is located in the shell and comprises a light source plate extending in the section direction of the shell, the end of an opening part of the shell extends to the front side of the light source plate, and a mounting groove is formed in the outer edge of the light-emitting assembly. The lens is arranged on the front side of the light source plate, a fixing piece is arranged at the end, close to the light source plate, of the lens, the outer edge of the lens bends and extends backwards to form the fixing piece, the fixing piece is inserted into the mounting groove, and therefore the lens and the light-emitting assembly are fixedly connected.

Description

Technical Field

[0001] This utility model relates to the field of lighting, specifically to a lighting device. Background Technology

[0002] In lighting fixtures, high-transmittance lampshades, such as glass lampshades, can efficiently transmit light and reduce light energy loss. However, high-transmittance lampshades themselves do not scatter light. When light emitted from the light source passes through the lampshade, the unscattered light may shine directly into the eyes, forming strong local bright spots and causing the observer to experience glare.

[0003] To alleviate the aforementioned problems, existing technologies typically add an optical lens between the light source and the high-transmittance lampshade. The lens guides the light path, allowing the light to diffuse evenly before reaching the lampshade. This design effectively reduces the concentration of direct light, thereby minimizing glare.

[0004] However, in existing technologies, some lighting devices generate significant localized heat from their light source panels. Lenses used to diffuse light need to avoid direct contact with the light source panel to prevent deformation or melting due to heat. Therefore, they are typically positioned separately in front of the light source panel. However, light rays at angles roughly parallel to the light source panel are difficult to guide through the lenses. In some usage scenarios, such as when a chandelier bulb is suspended at approximately the same height as the user's eye level, direct light may still enter the eyes, causing glare and negatively impacting the user experience. Utility Model Content

[0005] To address the above problems, this utility model provides a lighting device that utilizes a structure that facilitates stable assembly and prevents light rays at an angle parallel to the light source plate from directly entering the eyes.

[0006] The lighting device provided by this utility model includes a housing, a lampshade, a light-emitting component, and a lens. The housing has an opening at one end, and the lampshade covers the front side of the opening and is fixedly connected to the housing. The light-emitting component is located inside the housing and includes a light source plate extending along the cross-sectional direction of the housing. The end of the opening in the housing extends to the front side of the light source plate, and a mounting groove is provided at the front end of the light-emitting component. The lens is disposed on the front side of the light source plate, and a fixing member is provided at the end of the lens near the light source plate. The fixing member is formed by bending and extending the outer edge of the lens rearward, and is inserted into the mounting groove, thereby fixing the lens to the light-emitting component.

[0007] Because the end of the housing extends to the front of the light source board, it can block light rays that are parallel or substantially parallel to the surface of the light source board. Even when a user observes the lighting device from the side of the light source board, at a position substantially flush with it, the light emitted by the light source board will not directly enter the user's eyes, thus avoiding glare. Furthermore, because the outer edge of the light-emitting component has a mounting groove, the lens can be fixed by inserting a fastener into the mounting groove. This method of fixing by inserting into the mounting groove effectively increases the contact area between the fastener and the light-emitting component, improving heat dissipation.

[0008] Optionally, the end of the lens near the light source plate has a flat plate portion and a chamfered portion. The flat plate portion extends along the cross-sectional direction, and the chamfered portion connects the flat plate portion and the fixing member. The chamfered portion can scatter the light from the connection between the flat plate portion and the fixing member, further ensuring that the light emitted from the light source plate to the side and front does not directly enter the human eye.

[0009] Optionally, the surface of the plate portion is configured as a scattering surface. By providing a scattering surface on the surface of the plate portion, light emitted from the light source plate that does not pass through the lens body can be scattered, preventing light emitted from the lens to the side and front from directly entering the human eye.

[0010] Optionally, the chamfered portion is a rounded chamfer. A rounded chamfer can improve the scattering effect and avoid excessive local brightness that could cause glare.

[0011] Optionally, the fixing member is a first snap-fit ​​member, and the light-emitting component has a second snap-fit ​​member that matches and snaps into the first snap-fit ​​member. This snap-fit ​​fixing method improves the ease of lens assembly.

[0012] Optionally, the light-emitting component includes a metal heat sink, which comprises an integrally formed cylindrical portion, a stepped portion, and a boss. The cylindrical portion is fitted and fixed to the housing. The stepped portion is located at the front end of the cylindrical portion and extends along the cross-sectional direction. The boss is located at the center of the stepped portion and protrudes forward from the stepped portion. The light source board is fixed to the front surface of the boss. The outer wall of the boss has a slot, and the fixing member includes a claw that enters the slot for locking. The metal heat sink can quickly and efficiently dissipate the heat generated by the light source board and the easily heat-generating electrical components located behind the light source board through the housing.

[0013] Optionally, a sealant is also included, which is filled between the outer periphery of the fastener and the housing. By injecting the sealant, the lampshade can be securely bonded using the recessed portion between the fastener and the housing, thereby increasing the bonding area and improving the sealing performance.

[0014] Optionally, the light source board is an on-board LED module.

[0015] Optionally, the lampshade is made of a highly light-transmitting material.

[0016] Alternatively, the lampshade may be a glass lampshade. Attached Figure Description

[0017] Figure 1 This is an external structural diagram of a lighting device provided in some embodiments of the present invention.

[0018] Figure 2 This is an exploded structural diagram of a lighting device provided in some embodiments of the present invention.

[0019] Figure 3 This is a structural diagram of the metal heat sink of the lighting device provided in some embodiments of the present invention.

[0020] Figure 4 This is a cross-sectional view of a lighting device provided in some embodiments of the present invention.

[0021] Reference numerals: 100-Lighting device; 200-Housing; 202-Opening; 300-Lampshade; 400-Lamp holder; 500-Light-emitting component; 502-Mounting groove; 520-Light source board; 522-Light source board bracket; 540-Metal heat sink; 542-Cylinder; 544-Stepped part; 546-Boss; 548-Slot; 600-Lens; 610-Main body; 620-Fixing component; 621-Plate part; 622-Diffusing surface; 624-Chamfered part; 626-Claw; 628-Sealant. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] <Lighting device 100>

[0024] refer to Figure 1 This embodiment provides a lighting device 100, specifically an LED spherical lamp. Viewed from the outside, the lighting device 100 includes a housing 200, a lampshade 300, and a lamp holder 400. The front end of the housing 200 has an opening 202 (see reference). Figure 2 and Figure 4The lampshade 300 is fixed to the front end of the housing 200 and covers the opening 202. The lamp holder 400 is fixed to the rear end of the housing 200. The cross-sections of the lampshade 300, housing 200, and lamp holder 400 are all basically circular, and the three are coaxially arranged and connected in sequence. The lampshade 300 is bonded to the housing 200, and the lamp holder 400 is threaded to the housing 200.

[0025] The housing 200 is made of a material with a certain strength, such as metal or plastic. The lampshade 300 is made of a high-transmittance material. A "high-transmittance material" is a material that allows light to pass through almost completely without significant scattering or attenuation within the material itself; for example, a material with a light transmittance exceeding 80%, 90%, 95%, or 98%. High-transmittance materials can be, for example, glass or polymer materials that do not guide light scattering.

[0026] The lamp holder 400 is made of conductive materials, such as copper, aluminum and other metals.

[0027] <Light-emitting components 500>

[0028] Figure 2 This is an exploded view of the lighting device 100 provided in this embodiment. (Reference) Figure 2 The lighting device 100 has a light-emitting component 500 inside its housing 200. The light-emitting component 500 mainly includes a light source board 520, a metal heat sink 540, and a driving circuit (not shown, installed in the cavity enclosed by the metal heat sink 540).

[0029] The metal heat sink 540 is fixed inside the housing 200 and contacts the housing 200 for heat transfer, thereby improving the heat dissipation performance of the lighting device 100. The light source board 520 is fixedly mounted on the front end face of the metal heat sink 540 using a light source board bracket 522 and screws, and the lens 600 is snapped and fixed to the metal heat sink 540. For the structure and method of how the light source board 520 is fixed to the metal heat sink 540 using the light source board bracket 522, please refer to the description in prior patent CN222047552U; this embodiment will not repeat it further.

[0030] <Light Source Board 520>

[0031] refer to Figure 2In this embodiment, the light source board 520 is fixed to the front end of the metal heat sink 540 using a light source board bracket 522. The light source board 520 is a chip-on-board (COB) LED module, i.e., a COB light source. COB is an integrated light source technology that uses conductive or non-conductive adhesive to adhere bare chips to an interconnect substrate, and then performs wire bonding to achieve electrical connection. COB light sources can integrate multiple chips on a single substrate to form a high-power light source, but at the same time, they face more prominent heat dissipation problems.

[0032] <Metal Heatsink 540>

[0033] To better address the heat dissipation issue of COB light sources, a metal heat sink 540 is provided inside the housing 200 of the lighting device 100 provided in this embodiment. Figure 3 This is a structural schematic diagram of the metal heat sink 540 of the lighting device 100 in this embodiment. (See reference) Figure 3 The metal heat sink 540 is integrally formed with a cylindrical portion 542, a stepped portion 544, and a boss 546. The cylindrical portion 542 constitutes the main body of the metal heat sink 540 and is cylindrical in shape, matching the inner wall shape of the housing 200. When assembled, the outer surface of the cylindrical portion 542 fits against the inner surface of the housing 200 for better heat transfer.

[0034] Stepped portion 544 is provided in the axial direction of cylindrical portion 542 (parallel to) Figure 1 The front end of the step portion 544 is located in the front-to-back direction and extends along the cross-sectional direction, that is, along a plane perpendicular to the axial direction. The boss 546 is located in the center of the step portion 544 and extends forward from the step portion 544. The front end face of the boss 546 is configured as a plane for mounting and fixing the light source plate 520.

[0035] <Lens 600>

[0036] Continue to refer to Figure 2 In the lighting device 100 provided in this embodiment, a lens 600 is provided on the front side of the light source plate 520 in the axial direction. The lens 600 can scatter the light emitted by the light source plate 520 to prevent the light from shining directly into the eyes. The lens 600 includes a trumpet-shaped main body 610 with a diameter that gradually increases from back to front. The rear end of the main body 610 is formed with a flat plate 621 in the form of an enlarged diameter. The flat plate 621 is spaced apart from the light source plate 520. The outer edge of the flat plate 621 is bent and extended rearward to form a fixing member 620. The lens 600 is fixedly connected to the front outer edge of the metal heat sink 540 by means of the fixing member 620.

[0037] In some usage scenarios, such as when the lighting fixture 100 is installed in a chandelier, its height may be at or near eye level. In these scenarios, the internal structure of the lighting fixture 100, which uses, for example, a glass lampshade 300, is transparent and visible. Although the lens 600 can scatter the light emitted from the light source panel 520 from the front side to avoid glare, light rays that are substantially parallel to the side of the light source panel 520 can still directly enter the user's eye, causing glare.

[0038] Figure 4 A cross-sectional view of the lighting device 100 provided in this embodiment, taken along a plane passing through its central axis, is shown.

[0039] refer to Figure 4 In this embodiment, to prevent lateral light rays substantially parallel to the light source plate 520 from directly entering the human eye, the position of the front end of the housing 200 of the lighting device 100 and the assembly position of the light source plate 520 are limited as follows: the front end of the housing 200 extends to the front of the light source plate 520. By extending the front end of the housing 200 to the front of the light source plate 520, light rays emitted from the light source plate 520 along a direction substantially parallel to the surface of the light source plate 520 can be blocked. Through this dimensional and assembly relationship, along... Figure 4 Light rays from direction A can be blocked by the casing 200 to prevent them from shining directly into the eyes.

[0040] Furthermore, the lateral light emitted by the light source board 520 also includes light along... Figure 4 Light rays in directions B and C. To prevent the side light rays emitted by the light source plate 520 from shining directly into the eye, the rear end of the lens 600 of the lighting device 100 provided in this embodiment also has a scattering surface 622 (i.e., the surface of the flat plate portion 621) extending along the cross-sectional direction, and a chamfered portion 624 connecting the scattering surface 622 and the fixing member 620.

[0041] refer to Figure 4 In this embodiment, the chamfered portion 624 is a rounded chamfer. The rounded chamfer can effectively scatter the light at the chamfered portion 624, preventing light in the B direction from being refracted or reflected at the chamfered portion 624 and directly entering the eye, thus avoiding glare. As for light in the C direction, the scattering surface 622 (for example, a frosted surface) can effectively scatter the light in this direction, preventing glare caused by light in the C direction.

[0042] With the above structure, the lighting device 100 provided in this embodiment utilizes the simple structural design of the rear end of the lens 600, combined with the size and assembly relationship of the housing 200, to effectively eliminate the possibility of glare caused by the side light emitted by the light source plate 520, thereby improving the user's visual experience.

[0043] Furthermore, the lighting device 100 provided in this embodiment can efficiently assemble the lens 600 and the lampshade 300. (See reference) Figure 2 and Figure 3 The light-emitting component 500 has a mounting groove 502 formed on its outer edge. A fixing member 620 is disposed on the outer edge of the rear end of the lens 600, extending rearward from the outer edge of the lens 600, and can be inserted into the mounting groove 502 to fix it to the metal heat sink 540. Specifically, a slot 548 is provided on the outer wall of the boss 546 of the metal heat sink 540. The fixing member 620 of the lens 600 includes a claw 626 extending axially and protruding inward at its end. This claw 626 is adapted to engage in the slot 548 to fix the lens 600 to the metal heat sink 540.

[0044] When the claw 626 engages with the slot 548, because the front end of the housing 200 extends to the front side of the light source board 520, an annular groove is further formed between the housing 200 and the fixing member 620. By injecting sealant 628 into the annular groove, the cured sealant 628 can both bond and fix the lampshade 300 and fix the relative positions of the lens 600, the metal heat sink 540, and the housing 200. In this way, while meeting the size requirements of the fixing member 620 of the lens 600, it ensures that light does not leak directly to the side or rear, achieving an ideal light output effect. By using the simple structure of the fixing member 620 and the sealant fixation, the glare problem can be solved while efficiently completing the assembly and fixation between the lens 600, the housing 200, the lampshade 300, and the metal heat sink 540.

[0045] Furthermore, the presence of assembly structures such as mounting groove 502, card slot 548, and glue groove increases the contact area between components, improving heat transfer between them. Additionally, sealant 628 fills the gaps between components, ensuring both heat transfer and sealing performance of the lighting device 100.

[0046] In this embodiment, the mounting groove 502 (i.e., the part where the step portion 544 is located) is located on the outer edge of the light-emitting component 500. In this way, the lampshade 300 can abut against the front end of the cylindrical portion 542, which facilitates stable assembly and is more aesthetically pleasing. In other embodiments of this utility model, the mounting groove 502 can be positioned further inward and further separated from the front end of the cylindrical portion 542.

[0047] In this embodiment, the front end of the housing 200 extends to the front side of the light source plate 520, but is located at the rear side of the flat plate portion 621. In some embodiments, the housing 200 may also continue to extend forward to the front side of the flat plate portion 621. In these embodiments, the frosted scattering surface 622 and the chamfered portion 624 on the flat plate portion 621 may be omitted, and the housing 200 alone can be used to block direct light from the side.

[0048] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lighting device, characterized in that, include: The shell has an opening at one end; A lampshade covers the front side of the opening and is fixedly connected to the housing; A light-emitting component, located inside the housing, includes a light source plate extending along the cross-sectional direction of the housing, the end of the opening in the housing extends to the front side of the light source plate, and a mounting groove is provided at the front end of the light-emitting component; A lens is disposed on the front side of the light source plate. The end of the lens near the light source plate has a fixing member. The fixing member is formed by bending and extending the outer edge of the lens to the rear side. The fixing member is inserted into the mounting groove, thereby fixing the lens to the light-emitting component.

2. The lighting device as claimed in claim 1, characterized in that, The lens has a flat plate portion and a chamfered portion at one end near the light source plate. The flat plate portion extends along the cross-sectional direction, and the chamfered portion connects the flat plate portion and the fixing member.

3. The lighting device as described in claim 2, characterized in that, The surface of the plate portion is configured as a scattering surface.

4. The lighting device as described in claim 2, characterized in that, The chamfered portion is a rounded chamfer.

5. The lighting device as claimed in claim 1, characterized in that, The fixing member is a first snap-fit ​​member, and the light-emitting component has a second snap-fit ​​member that matches and snaps into the first snap-fit ​​member.

6. The lighting device as described in claim 5, characterized in that, The light-emitting component includes: A metal heat sink, comprising an integrally formed cylindrical portion, a stepped portion, and a boss. The cylindrical portion is fitted and fixed to the shell. The stepped portion is located at the front end of the cylindrical portion and extends along the cross-sectional direction. The boss is located in the center of the step portion and is formed by the step portion protruding forward. The light source plate is fixed to the front surface of the boss. The outer wall of the boss has a slot, and the fastener includes a claw that enters the slot for engagement and fixation.

7. The lighting device as claimed in claim 1, characterized in that, Also includes Sealant is used to fill the space between the outer periphery of the fastener and the housing.

8. The lighting device as claimed in claim 1, characterized in that, The light source board is an on-board LED module.

9. The lighting device as described in any one of claims 1-8, characterized in that, The lampshade is made of a high light transmittance material.

10. The lighting device as claimed in claim 9, characterized in that, The lampshade is a glass lampshade.

Images