A type of downlight

Abstract

This utility model discloses a downlight, including a radiator, a lighting component, and an upper cover. The radiator has a through-hole and a vertically penetrating hollow section. The lighting component is fixed to the lower end of the radiator by screws threaded into the through-hole. The sidewall of the through-hole communicates with the hollow section and forms an opening. A stop is provided at the upper end of the through-hole. A downwardly extending buckle is provided on the lower side of the upper cover. The buckle is screwed into the through-hole through the opening as the upper cover rotates and is locked below the stop, thereby axially fixing the upper cover to the upper end of the radiator. This application eliminates the need for additional screws or other independent fasteners, reducing the number of parts. During installation, simply rotating the upper cover completes the locking and fixing; during disassembly, rotating in the opposite direction removes it without tools, facilitating assembly and maintenance. The stop and opening are directly formed using the existing hollow section and through-hole structure inside the radiator, resulting in a more compact structure.

Description

Technical Field

[0001] This utility model relates to the field of lighting technology, and in particular to a downlight. Background Technology

[0002] Downlights typically consist of a radiator, a lighting component, and a top cover. The lighting component is located at the lower end of the radiator and is used to provide illumination; the top cover is located at the upper end of the radiator and is used to cover the opening at the top of the radiator.

[0003] In existing downlights, the upper cover and the heat sink are generally connected and fixed by screws, that is, the upper cover is locked to the upper surface of the heat sink by additional screws. This connection method requires the use of independent screw fasteners. During installation, each screw must be tightened, and during disassembly and maintenance, each screw must be unscrewed. The operation is relatively cumbersome, there are many parts, and the assembly efficiency is low.

[0004] In addition, the radiator has a through-hole section running vertically and a through hole for connecting lighting components. If the upper cover is fixed with screws, a screw hole or screw post structure needs to be designed separately on the upper cover or the upper surface of the radiator, which lacks coordination with the existing through-hole structure inside the radiator. Utility Model Content

[0005] The present invention aims to at least partially solve one of the problems existing in the prior art. To this end, the present invention proposes a downlight.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A downlight includes a heat sink, a lighting component, and a top cover. The heat sink has a through-hole and a vertically penetrating hollow section. The lighting component is located at the lower end of the heat sink and is threadedly connected to the through-hole by screws to fix the lighting component. The top cover is located at the upper end of the heat sink. The sidewall of the through-hole communicates with the hollow section and forms an opening. A stop is provided at the upper end of the through-hole. A downwardly extending fastener is provided on the lower side of the top cover. The fastener can be screwed into the through-hole through the opening as the top cover rotates and is locked below the stop.

[0008] In some embodiments, the fastener includes a connecting portion and a engaging portion. The upper end of the connecting portion is fixedly connected to the lower surface of the upper end cover, and the engaging portion is located on one side of the lower end of the connecting portion and can be screwed into the through hole.

[0009] In some embodiments, the width of the opening is smaller than the diameter of the through hole.

[0010] In some embodiments, the upper edge of the engaging portion and the lower edge of the stop are respectively provided with guide slopes.

[0011] In some embodiments, the heat sink has four circumferentially spaced perforated portions inside, and two through holes are provided, one on each side of two oppositely arranged perforated portions.

[0012] In some embodiments, a recessed platform is provided on the inner edge of the upper end of the radiator, and the upper end cover is disposed within the recessed platform.

[0013] In some embodiments, a threading hole is provided on the upper end cover, and the threading hole is vertically connected to the hollowed-out portion.

[0014] In some embodiments, the outer wall of the radiator is provided with axially extending heat dissipation fins.

[0015] In some embodiments, the lighting assembly includes a lamp holder and a lamp plate disposed on the lamp holder, the lamp holder being fixed to the lower end of the heat sink by screws and threaded connection to the through hole.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. Because an opening communicating with the hollowed-out portion is formed on the side wall of the through hole, and a downwardly extending latching member is provided on the lower side of the upper end cover, the latching member is screwed into the through hole through the opening as the upper end cover rotates and is locked under the stop block, thereby axially limiting and fixing the upper end cover to the upper end of the radiator. Compared with the existing technology that uses screw fastening, there is no need to provide additional screws or other independent fasteners, reducing the number of parts.

[0018] 2. During installation, simply close the top cover downwards and rotate it a certain angle; the latching piece will then slide into the through hole and lock into place below the stop block. To disassemble, rotate the top cover in the opposite direction, and the latching piece will retract from the opening. The entire process requires no tools, facilitating assembly and subsequent maintenance.

[0019] 3. The stop block at the top of the through hole and the opening on the side wall of the through hole are directly formed by utilizing the existing hollow part and through hole structure inside the heat sink. There is no need to design separate screw holes, screw posts or other connection structures on the upper end cover or the upper end face of the heat sink. The structure is more compact and avoids interference between the connection structure and the heat dissipation structure. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the downlight of this utility model.

[0021] Figure 2 This is a cross-sectional view of the downlight of this utility model.

[0022] Figure 3This is a schematic diagram of the upper cover of this utility model after it has been opened.

[0023] Figure 4 This is a partial cross-sectional view of the upper end cap of this utility model after it is closed.

[0024] Figure 5 This is a cross-sectional view of the upper part of the radiator of this utility model.

[0025] Figure 6 This is a cross-sectional view of the horizontal cross-section of the radiator of this utility model.

[0026] Figure 7 This is a schematic diagram of the lighting component of this utility model installed at the lower end of the heat sink. Detailed Implementation

[0027] The following detailed description provides various embodiments or examples for implementing this utility model. Of course, these are merely embodiments or examples and are not intended to be limiting. Additionally, repeated reference numerals, such as repeated numbers and / or letters, may be used in different embodiments. These repetitions are for the purpose of simple and clear description of this utility model and do not represent a specific relationship between the different embodiments and / or structures discussed.

[0028] like Figures 1-7 The downlight shown includes a heat sink 1, a lighting component 2, and an upper cover 3.

[0029] The radiator 1 has a through-hole 4 and a through-hole 5 extending vertically through the interior. The through-hole 4 extends axially along the radiator 1, and the through-hole 5 extends downward from the upper end of the radiator 1. The lighting component 2 is located at the lower end of the radiator 1, and a screw is provided on the lighting component 2 at the position corresponding to the through-hole 5. The screw is threaded into the inner wall of the through-hole 5, thereby fixing the lighting component 2 to the lower end of the radiator 1.

[0030] The upper cover 3 is placed on the upper end of the radiator 1 to cover the opening at the upper end of the radiator 1.

[0031] The sidewall of the through hole 5 is connected to the hollow part 4, that is, an opening 6 is formed on the sidewall of the through hole 5, so that the internal space of the through hole 5 and the internal space of the hollow part 4 are connected to each other through the opening 6. A stop 7 is provided at the upper end of the through hole 5, and the stop 7 protrudes inward along the radial direction of the through hole 5.

[0032] The lower side of the upper cover 3 is provided with a downwardly extending fastener 8, the position of which corresponds to the position of the opening 6, and the fastener 8 can enter the through hole 5 through the opening 6.

[0033] See Figures 3-6As shown, the fastener 8 includes a connecting portion 21 and a engaging portion 22. The upper end of the connecting portion 21 is fixedly connected to the lower surface of the upper end cover 3, and the connecting portion 21 extends downward in the vertical direction. The engaging portion 22 is provided on one side of the lower end of the connecting portion 21, that is, the engaging portion 22 protrudes laterally from the lower end of the connecting portion 21, and the engaging portion 22 can be screwed into the through hole 5 as the upper end cover 3 rotates.

[0034] The width of opening 6 is smaller than the diameter of through hole 5. Engaging part 22 is cylindrical, and the diameter of engaging part 22 is slightly larger than the width of opening 6.

[0035] The upper edge of the engaging part 22 is provided with a guide slope, and the lower edge of the stop block 7 is also provided with a guide slope, and the two guide slopes cooperate with each other.

[0036] During assembly, first place the upper cover 3 on the upper end of the radiator 1, and insert the buckle 8 on the lower side of the upper cover 3 into the upper opening of the hollow part 4. The buckle 8 extends downward along the hollow part 4 until the engaging part 22 reaches the position below the stop block 7.

[0037] Then, the upper cover 3 is rotated, and the engaging part 22 rotates together with the connecting part 21. The engaging part 22 is screwed into the through hole 5 from the position of the hollow part 4 through the opening 6. Since the diameter of the engaging part 22 is slightly larger than the width of the opening 6, a certain interference fit is formed between the engaging part 22 and the side wall of the opening 6 during the screwing process. Appropriate rotational force is required to complete the screwing. This interference fit makes it difficult for the engaging part 22 to come out of the opening 6 on its own when not rotated by external force.

[0038] During rotation, the guide slope of the upper edge of the engaging part 22 and the guide slope of the lower edge of the stop 7 slide together. The guide slope guides the engaging part 22 to slide smoothly into the area below the stop 7, avoiding rigid interference between the engaging part 22 and the stop 7, which would affect the rotation operation.

[0039] After being rotated into position, the engaging part 22 is located directly below the stop block 7. The stop block 7 prevents the engaging part 22 from moving upward, thereby axially fixing the upper end cover 3 to the upper end of the radiator 1.

[0040] During disassembly, rotate the upper cover 3 in the opposite direction. The locking part 22 will rotate from the screw-in position back to the position of the hollow part 4. Then, lift the upper cover 3 upward to pull the buckle 8 out of the hollow part 4 to complete the disassembly.

[0041] In this invention, the radiator 1 has four circumferentially spaced hollow sections 4 inside. Two through holes 5 are provided, each located on one side of one of the two opposite hollow sections 4.

[0042] Four perforated sections 4 are arranged at intervals along the circumference of the radiator 1, which reduces the overall weight of the radiator 1 and increases the internal heat dissipation area. Two through holes 5 are symmetrically arranged on one side of the two opposite perforated sections 4, and each through hole 5 is connected to the perforated section 4 on the same side through an opening 6. Two fasteners 8 are correspondingly provided on the lower side of the upper end cover 3, and the two fasteners 8 are respectively positioned opposite the two through holes 5.

[0043] See Figure 1 , Figure 2 , Figure 4 As shown, a recessed platform 61 is provided on the inner edge of the upper end of the radiator 1. The recessed platform 61 is formed by recessing inward along the circumference of the upper end of the radiator 1. The upper end cover 3 is placed inside the recessed platform 61, that is, the outer diameter of the upper end cover 3 is adapted to the inner diameter of the recessed platform 61, and the upper end cover 3 is embedded in the recessed platform 61.

[0044] The upper cover 3 is embedded in the recessed platform 61. The side wall of the recessed platform 61 provides circumferential positioning for the upper cover 3, allowing it to be quickly aligned during installation and preventing circumferential displacement of the upper cover 3 relative to the radiator 1. At the same time, the stepped surface of the recessed platform 61 provides axial support for the upper cover 3, ensuring that the upper surface of the upper cover 3 is flush with or lower than the upper surface of the radiator 1. This results in a smoother and more aesthetically pleasing appearance and prevents the upper cover 3 from protruding from the upper surface of the radiator 1 and being easily damaged by impacts.

[0045] The outer wall of the radiator 1 is provided with axially extending heat dissipation fins 81. The heat dissipation fins 81 protrude outward from the outer wall of the radiator 1 and are arranged to extend along the axial direction of the radiator 1.

[0046] The heat generated by the lighting component 2 during operation is conducted to the heat sink 1. The heat dissipation fins 81 increase the contact area between the heat sink 1 and the outside air, allowing the heat on the heat sink 1 to dissipate into the surrounding air more quickly, thus improving heat dissipation efficiency. The heat dissipation fins 81 extend axially, increasing the length of the heat dissipation path and further enhancing the heat dissipation effect. This helps to reduce the operating temperature of the lighting component 2 and extend its service life.

[0047] See Figure 2 , Figure 7 As shown, the lighting assembly 2 includes a lamp holder 91 and a lamp plate 92 disposed on the lamp holder 91. The lamp plate 92 is fixedly installed on the lower end face of the lamp holder 91, and the lamp holder 91 is threadedly connected to the through hole 5 by screws, thereby fixing the lighting assembly 2 as a whole to the lower end of the heat sink 1.

[0048] The lamp panel 92 is used to mount the light source, and the lamp holder 91 provides mounting support for the lamp panel 92. The lamp holder 91 is in direct contact with the lower end of the heat sink 1. Heat generated by the lamp panel 92 during operation is conducted to the lamp holder 91, and then from the lamp holder 91 to the heat sink 1, where it is dissipated into the outside air. The lamp holder 91 is fixed by screws and threaded connections to the through holes 5, ensuring a tight fit between the lamp holder 91 and the heat sink 1. This facilitates the smooth transfer of heat from the lamp panel 92 to the heat sink 1, improving heat dissipation efficiency.

[0049] Based on the accompanying drawings and the foregoing display and description of the basic principles, main features, and advantages of this utility model, those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A down lamp, comprising a heat sink (1), a lighting assembly (2) and an upper end cover (3), the heat sink (1) is internally provided with a hollow part (4) and a through hole (5) penetrating from top to bottom, the lighting assembly (2) is arranged at the lower end of the heat sink (1), and the lighting assembly (2) is threadedly connected with the through hole (5) by a screw to fix the lighting assembly (2), and the upper end cover (3) is arranged at the upper end of the heat sink (1), characterized in that: The side wall of the through hole (5) is connected to the hollow part (4) and forms an opening (6). A stop block (7) is provided at the upper end of the through hole (5). A downwardly extending buckle (8) is provided on the lower side of the upper end cover (3). The buckle (8) can be screwed into the through hole (5) through the opening (6) as the upper end cover (3) rotates, and is locked below the stop block (7).

2. A downlight according to claim 1, characterized in that: The buckle (8) includes a connecting part (21) and a locking part (22). The upper end of the connecting part (21) is fixedly connected to the lower surface of the upper end cover (3). The locking part (22) is located on one side of the lower end of the connecting part (21) and can be screwed into the through hole (5).

3. A downlight according to claim 2, characterized in that: The width of the opening (6) is smaller than the diameter of the through hole (5).

4. A downlight according to claim 2, characterized in that: The upper edge of the engaging part (22) and the lower edge of the stop block (7) are respectively provided with guide slopes.

5. A downlight according to claim 2, characterized in that: The radiator (1) has four hollowed-out parts (4) arranged circumferentially inside, and two through holes (5) are provided, which are respectively located on one side of two opposite hollowed-out parts (4).

6. A downlight according to claim 1, characterized in that: A recessed platform (61) is provided on the inner edge of the upper end of the radiator (1), and the upper end cover (3) is placed inside the recessed platform (61).

7. A downlight according to claim 1, characterized in that: A threading hole (71) is provided on the upper end cover (3), and the threading hole (71) is connected to the hollow part (4) vertically.

8. A downlight according to claim 1, characterized in that: The outer wall of the radiator (1) is provided with heat dissipation fins (81) extending along the axial direction.

9. A downlight according to claim 1, characterized in that: The lighting assembly (2) includes a lamp holder (91) and a lamp plate (92) disposed on the lamp holder (91). The lamp holder (91) is fixed to the lower end of the radiator (1) by screws and threaded connection with the through hole (5).

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