Lamp body unit and telescopic recessed lamp

Abstract

The utility model provides a lamp body unit and telescopic recessed lamp, the lamp body unit includes guide piece, connecting piece and radiator, guide piece includes first ring part and two above's guide rail of distribution along the circumference of first ring part, guide rail is equipped with first cooperation part, connecting piece is located in the space that each guide rail encloses, connecting piece is equipped with the second cooperation part of first cooperation part matched connection, connecting piece can slide along the guide rail, the tail end of radiator is rotatably connected with connecting piece, guide piece is made of heat dissipation metal material, the inside of guide rail is equipped with heat dissipation rib that extends in the direction of self extension, when radiator is in the space, heat dissipation rib is adjacent with radiator, and / or the tail end of radiator is equipped with heat dissipation cavity, is equipped with multiple parallel distribution's heat dissipation fin in heat dissipation cavity, and the ventilation slot of cavity wall of heat dissipation cavity is equipped with in the heat dissipation fin between two adjacent pieces. Telescopic recessed lamp is equipped with above-mentioned lamp body unit, and this lamp body unit improves the heat dissipation effect, prolongs the service life of light emitting module.

Description

Technical Field

[0001] This utility model relates to the field of lighting technology, specifically to a lamp body unit and a telescopic recessed lamp equipped with the lamp body unit. Background Technology

[0002] Recessed lighting fixtures are one of the mainstream lighting fixtures in the indoor lighting field. They are installed by embedding them into pre-drilled mounting holes in the ceiling, offering the advantage of easy installation and removal. The lamp head of a telescopic recessed light extends or retracts from the ceiling along the axis of the face ring to meet different illumination height requirements. It also allows for different circumferential angle lighting (when the lamp head is below the face ring, it can rotate around the axis of the face ring to adjust the circumferential lighting angle) and pitch angle lighting (when the lamp head is below the face ring, it can rotate around the rotation axis (vertical in the height direction) to adjust the pitch lighting angle). Therefore, compared to downlights and spotlights, telescopic recessed lights offer more flexible, versatile, and wider-range lighting angle adjustment, making them suitable for a wider range of lighting applications.

[0003] However, the structural design of existing retractable recessed lights focuses primarily on installation adaptability (such as ease of assembly and installation stability) and aesthetic harmony (such as integrated design and visual integration with the installation scene), neglecting sufficient attention to optimizing heat dissipation performance. Consequently, to meet heat dissipation requirements under the same power conditions, existing retractable recessed lights require increasing the overall size of the fixture to accommodate more heat dissipation space, resulting in a larger product size than conventional non-retractable lights; or, given the limited product size, the luminaire power must be reduced to decrease heat generation, thus affecting the lighting effect and adaptability to different usage scenarios. Specifically, existing retractable recessed lights suffer from the following design flaws, leading to inefficient heat dissipation and impacting the lifespan of the fixture: like Figure 1 As shown, the guide 91 of the telescopic recessed light 9 only serves as a connection and slide rail, and does not participate in the heat conduction and dissipation of the lamp head 92. Therefore, when the lamp head 92 is retracted and embedded in the ceiling, the heat exchange between the inside and outside of the lamp head 92 is difficult due to the limited space inside the ceiling and the slow airflow. As a result, the heat generated by the light-emitting module inside the lamp head 92 cannot be effectively conducted and dissipated. When the lamp head 92 is moved to the outside of the ceiling, the heat generated by the light-emitting module is still difficult to be effectively conducted and dissipated due to the structural design of the heat sink 921 (usually a closed cylindrical shape). Utility Model Content

[0004] The primary objective of this invention is to provide a lamp body unit that can improve heat dissipation and extend the lifespan of the light-emitting module.

[0005] The second objective of this utility model is to provide a telescopic recessed lamp with the aforementioned lamp body unit.

[0006] To achieve the first objective of this utility model, a lamp body unit is provided, including a guide member, a connector, and a heat sink. The guide member includes a first ring portion and two or more guide rails distributed circumferentially along the first ring portion. The guide rails are provided with a first mating portion. The connector is located within the space enclosed by the guide rails and is provided with a second mating portion that mates with the first mating portion. The connector can slide along the guide rails. The tail end of the heat sink is rotatably connected to the connector. The guide member is made of a heat-dissipating metal material. The inner side of the guide rails is provided with heat dissipation ribs extending in their own extension direction. When the heat sink is located within the space, the heat dissipation ribs are adjacent to the heat sink. And / or the tail end of the heat sink is provided with a heat dissipation cavity, which contains multiple parallel heat dissipation fins. The heat sink has ventilation slots that penetrate the cavity wall between two adjacent heat dissipation fins.

[0007] As can be seen from the above, the guide components are made of heat-dissipating metal material, and heat dissipation fins are set on the inner side of the guide rails adjacent to the heat sink. This allows the heat generated by the light-emitting module inside the heat sink to be transferred to the heat dissipation fins and then to the entire guide component when the heat sink retracts into the space enclosed by the guide rails. This expands the heat transfer path and heat exchange area, effectively reducing the heat of the light-emitting module. When the heat sink extends below the first ring (i.e., outside the ceiling), the heat transfer path and heat exchange area of ​​the heat sink are effectively expanded with the cooperation of the heat dissipation fins and ventilation slots, thereby efficiently dissipating heat from the light-emitting module. The above design can improve the heat dissipation efficiency of the light-emitting module and effectively extend the service life of the light-emitting module.

[0008] A preferred embodiment is that the radiator is cylindrical, with an internal mounting plate that divides the interior of the radiator into a receiving cavity and a heat dissipation cavity, and the heat dissipation fins are connected to the mounting plate.

[0009] As can be seen from the above, the mounting plate provides installation space for the light-emitting module, ensuring that the light-emitting module and the heat sink are reliably fixed. On the other hand, through the cooperation of the mounting plate and the heat sink fins, a heat dissipation path is effectively established between the light-emitting module and the heat sink fins, thereby improving the heat dissipation effect.

[0010] A further option is to have the heat dissipation fins perpendicular to the rotation axis of the radiator; or to have ventilation slots running through the radiator along the rotation axis.

[0011] As can be seen from the above, the above design can provide different heat dissipation effects, which not only improves the flexibility of lamp unit design and production, but also meets different heat dissipation requirements.

[0012] A further improvement is to make the thickness of the heat dissipation fins gradually decrease from the mounting plate to the rear end of the heat dissipation fins along the axial direction of the heatsink.

[0013] As can be seen from the above, this design can ensure that the radiator has sufficient heat exchange area, and can also reasonably introduce the materials used in the radiator, reduce production costs, and at the same time help to make the radiator lighter.

[0014] A further proposed solution is to use aluminum-silicon alloy, aluminum alloy, copper alloy, or copper as the heat dissipation metal material; the radiator is made of the heat dissipation metal material.

[0015] As can be seen from the above, by selecting heat dissipation metal materials, the heat dissipation effect of guide components and heat sinks can be ensured, and more options can be provided for the production of lamp body units, improving production flexibility and making it easier to select the best production solution according to different needs.

[0016] Another preferred embodiment is that the first mating part includes multiple slots distributed along the extension direction; the second mating part includes two or more first elastic claws, each of which corresponds to one or more guide rails, and the first elastic claw engages with any slot of a corresponding guide rail.

[0017] As can be seen from the above, the design of the first mating part and the second mating part facilitates the production and processing of the guide parts and connecting parts, and also facilitates their assembly and maintenance. This helps to improve assembly efficiency and maintenance convenience, while reducing the number of parts required for assembly and saving production costs.

[0018] A further solution is to provide two heat dissipation ribs for each guide rail, with the slot located between the two heat dissipation ribs.

[0019] As can be seen from the above, the design of the number of heat dissipation fins can maximize the heat dissipation effect when the heat sink is housed in the space enclosed by the guide rails without increasing production costs. At the same time, it also helps to balance the forces when the auxiliary connectors and heat sink slide, ensuring smooth sliding.

[0020] A further improvement is that the inner ring of the first ring is provided with a limiting groove; the connector is provided with a second elastic claw, which can be moved to engage with the limiting groove.

[0021] As can be seen from the above, this design can effectively prevent the connector from separating from the guide without being disassembled, thus avoiding the connector and heat sink from falling during use and ensuring safety.

[0022] A further embodiment is that the lamp body unit also includes a face ring and two or more spring clips. The face ring includes a second ring and an eave. The second ring is detachably fitted around the outer periphery of the first ring. The eave is located at the bottom of the second ring and surrounds the second ring. Two or more spring clips are installed on the second ring, and a clamping position is formed between the spring clips and the eave.

[0023] As can be seen from the above, the face ring and the spring clip are used to fix the lamp body unit to the external structure (such as the ceiling). At the same time, the addition of the face ring can simplify the production difficulty of the guide component and the production cost of the lamp body unit, and also help to reduce the overall weight of the lamp body unit, thereby optimizing the production of the lamp body unit.

[0024] To achieve another objective of this utility model, this utility model provides a telescopic recessed lamp, including a light-emitting module, which also includes the aforementioned lamp body unit. The light-emitting module is installed inside a heat sink, and the light-emitting end of the light-emitting module is positioned facing the front end of the heat sink.

[0025] As can be seen from the above, by configuring the aforementioned lamp body unit, the retractable recessed light can improve the heat dissipation effect of the light-emitting module and extend its service life. Attached Figure Description

[0026] Figure 1 This is a structural diagram of an existing retractable recessed light.

[0027] Figure 2 This is an exploded view of an embodiment of the telescopic recessed lamp of this utility model.

[0028] Figure 3 This is a first structural diagram of the guide component of an embodiment of the telescopic recessed lamp of this utility model.

[0029] Figure 4 This is the first structural diagram of an embodiment of the telescopic recessed lamp of this utility model, with some components omitted.

[0030] Figure 5 This is a first cross-sectional view of an embodiment of the telescopic recessed lamp of this utility model, with some components omitted.

[0031] Figure 6 This is a temperature cross-section diagram of the radiator retracting into the guide component when the guide rail of the existing telescopic recessed light is not equipped with heat dissipation fins.

[0032] Figure 7 This is a temperature cross-sectional view of the heat sink retracted into the guide member in an embodiment of the telescopic recessed lamp of this utility model.

[0033] Figure 8 This is a first structural diagram of the heat sink in an embodiment of the telescopic recessed lamp of this utility model.

[0034] Figure 9 This is a first structural diagram of an embodiment of the telescopic recessed lamp of this utility model.

[0035] Figure 10 Temperature cross-section diagram of the heat sink located below the guide when the existing retractable recessed light uses a closed lamp body.

[0036] Figure 11Temperature cross-section of the heat sink located below the guide member in this embodiment of the telescopic recessed lamp.

[0037] Figure 12 This utility model's telescopic recessed lamp embodiment shows a temperature cross-section of the radiator located below the guide member when the ventilation slot passes through the radiator along the rotation axis [i.e., the heat dissipation fins are horizontally distributed (approximately perpendicular to the paper surface)].

[0038] Figure 13 This utility model's telescopic recessed lamp embodiment shows the temperature cross-section of the radiator located below the guide member when the heat dissipation fins are perpendicular to the rotation axis of the radiator [i.e., the heat dissipation fins are vertically distributed (approximately parallel to the paper surface)].

[0039] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0040] Retractable recessed light embodiment Reference Figure 2 The retractable recessed light 100 includes a light body unit 101, a light-emitting module 102, a lens 103, and an anti-glare ring 104. The light body unit 101 includes a guide 1, a connector 2, a heat sink 3, and a face ring 4.

[0041] Combination Figure 3 The guide component 1 includes a first ring portion 11, a guide rail 12, and a fixing ring 13. There are two or more guide rails 12, and these two or more guide rails 12 are evenly distributed circumferentially along the first ring portion 11. In this embodiment, the number of guide rails 12 is two. This design ensures that the connector 2 is reliably connected to the guide rail 12 and moves smoothly along the guide rail 12, while also simplifying the structure of the guide component 1 and the connector 2 to the greatest extent possible, thus reducing production costs.

[0042] The guide rail 12 extends from the first ring portion 11 along the axial direction of the first ring portion 11. The fixing ring 13 is connected to the extended ends of the multiple guide rails 12 to ensure the structural strength of the guide rail 12 and the overall structural strength of the guide member 1, so that the connecting member 2 can slide smoothly and steadily relative to the guide rail 12.

[0043] The guide rail 12 is provided with a first mating part 121 and heat dissipation ribs 122, which extend along the extension direction of the guide rail 12. Preferably, each guide rail 12 is provided with two heat dissipation ribs 122, and the first mating part 121 is located between the two heat dissipation ribs 122. The number of heat dissipation ribs 122 is designed to maximize the heat dissipation effect when the radiator 3 is housed in the space enclosed by the guide rails 12 without significantly increasing production costs. It also helps to balance the forces when the auxiliary connector 2 and the radiator 3 slide, ensuring smooth sliding.

[0044] Furthermore, the guide component 1 is made of a heat-dissipating metal material to ensure its heat conduction effect; the heat-dissipating metal material can be an aluminum-silicon alloy, an aluminum alloy, a copper alloy, or copper. By selecting the heat-dissipating metal material, the heat dissipation effect of the guide component 1 on the heat sink 3 can be ensured, and more options can be provided for the production of the lamp body unit 101, improving production flexibility and facilitating the selection of the optimal production solution according to different needs.

[0045] The connector 2 is disposed within the space enclosed by each guide rail 12. The connector 2 has a second mating part 21, which engages with the first mating part 121 to allow the connector 2 to slide along the guide rail 12 and stably remain in a set position to maintain relative fixation with the guide rail 12. In this embodiment, the first mating part 121 includes multiple slots distributed along the extension direction of the guide rail 12, preferably at equal intervals. Correspondingly, the second mating part 21 includes two or more first elastic claws, and each of the two or more first elastic claws corresponds one-to-one with one or more guide rails 12. That is, the number of first elastic claws is equal to the number of guide rails 12; in this embodiment, the number of first elastic claws is two.

[0046] When the connector 2 is assembled with the guide 1, each first elastic claw engages with any slot on a corresponding guide rail 12. Based on the positional design of the first elastic claws in this embodiment, the slots engaging with each first elastic claw are at the same height; however, it is understood that in other embodiments, the heights of the first elastic claws may differ, and correspondingly, the heights of the slots engaging with each first elastic claw may also differ. The design of the first mating part 121 and the second mating part 21 makes the production and processing of the guide 1 and the connector 2 more convenient, and facilitates their assembly and maintenance, thereby improving assembly efficiency and maintenance convenience, while reducing the number of parts required for assembly and saving production costs. The connector 2 is preferably an injection-molded part.

[0047] Furthermore, the connector 2 is provided with a connecting rod 22, which is used for rotatable connection of the tail end of the heat sink 3, so that the heat sink 3 can rotate relative to the connecting rod 22, thereby realizing the adjustment of the pitch illumination angle of the light-emitting module 102. Moreover, the connector 2 is preferably also provided with a second elastic claw 23; correspondingly, the inner ring of the first ring portion 11 of the guide member 1 is provided with a limiting groove 111. The second elastic claw 23 can move to engage with the limiting groove 111, which is used to limit the sliding of the connector 2 by cooperating with the second elastic claw 23, preventing the connector 2 from coming off the bottom of the first ring portion 11 without being disassembled. This prevents the connector 2 from falling off the guide member 1 due to the gravity of the heat sink 3, the light-emitting module 102, the lens 103, the anti-glare ring 104, etc., during use, thus ensuring safety during use. When it is necessary to disassemble the guide 1 and the connector 2, the connector 2 can be pulled out by pressing the second elastic claw 23 so that it does not engage with the limiting groove 111 and is pulled down towards the first ring 11. This design makes it possible to disassemble and assemble the guide 1 and the connector 2 without the need for tools, which facilitates assembly and maintenance.

[0048] Combination Figure 4 and Figure 5 When the heat sink 3 retracts into the space enclosed by the guide rails 12 (including the fully retracted state completely retracted into the guide member 1 and the partially retracted state extending below the first ring 11), the heat dissipation ribs 122 are adjacent to the heat sink 3. Since the guide member 1 is made of heat-dissipating metal material, when the heat sink 3 is in the fully retracted or partially retracted state, the heat generated by the light-emitting module 102 inside the heat sink 3 will first be transferred to the heat sink 3, and then transferred to the entire guide member 1 through the heat dissipation ribs 122. By expanding the heat dissipation path and heat exchange area through the guide member 1, the heat dissipation effect on the light-emitting module 102 is improved, effectively reducing the heat of the light-emitting module 102, ensuring the stability of the operation of the light-emitting module 102, and extending the service life of the light-emitting module 102. The heat sink 3 is also made of heat-dissipating metal material.

[0049] Simulation analysis was performed on a traditional telescopic recessed light 100 (i.e., the guide rail 12 of the guide member 1 does not have heat dissipation fins 122) and the telescopic recessed light 100 of this application using simulation software (including but not limited to FloEFD software). The simulation environment temperature was set to 25℃, the heat dissipation metal material of the heat sink 3 and the guide member 1 of the telescopic recessed light 100 of this application was ADC12, the total light power was 30 watts, and other parameters were kept consistent. The simulation results are as follows: like Figure 6 As shown, the solder joint (Tsp) temperature measured by a conventional retractable recessed light 100 is approximately 70.25℃; Figure 7As shown, the telescopic recessed light 100 of this application has heat dissipation fins 122 on its guide rail 12, and the measured solder joint (Tsp) temperature is approximately 63.52℃. Compared with the conventional telescopic recessed light 100, the temperature of the telescopic recessed light 100 with heat dissipation fins 122 in this application decreases by approximately 6.73℃, a reduction of 14.87%. The heat dissipation optimization effect is significant.

[0050] Combination Figure 8 and Figure 9 The heat sink 3 is preferably cylindrical; wherein, the heat sink 3 is provided with a mounting plate 31, which divides the interior of the heat sink 3 into a receiving cavity 33 and a heat dissipation cavity 32. The opening of the receiving cavity 33 is located on the front end face of the heat sink 3, and the light-emitting module 102, the lens 103 and the anti-glare ring 104 are sequentially arranged in the receiving cavity 33. That is, the light-emitting module 102 is mounted on the mounting plate 31, so that the heat of the light-emitting module 102 can be transferred to the entire heat sink 3 through the mounting plate 31, thereby improving the heat dissipation effect of the heat sink 3 on the light-emitting module 102. The light-emitting end of the light-emitting module 102 is set towards the opening of the receiving cavity 33. The lens 103 is located between the light-emitting end of the light-emitting module 102 and the opening of the receiving cavity 33. The lens 103 is used to optimize the lighting effect of the light-emitting module 102. The anti-glare ring 104 is installed at the opening of the receiving cavity 33. The anti-glare ring 104 presses and fixes the lens 103 on the light-emitting module 102. The anti-glare ring 104 can perform anti-glare treatment on the light emitted by the light-emitting module 102 to achieve the anti-glare effect. Preferably, the anti-glare ring 104 and the heat sink 3 can be connected by a snap-fit ​​structure to facilitate the assembly and maintenance of the heat sink 3, the light-emitting module 102, the lens 103 and the anti-glare ring 104.

[0051] The heat dissipation cavity 32 is located near the rear end of the heat sink 3. Multiple heat dissipation fins 321 are arranged within the heat dissipation cavity 32 in a parallel configuration. Furthermore, the heat sink 3 has ventilation slots 34 penetrating the cavity wall between adjacent heat dissipation fins 321, forming ventilation channels with the adjacent heat dissipation fins 321. When the heat sink 3 extends below the first ring portion 11 (i.e., outside the ceiling), the heat dissipation fins 321 and ventilation slots 34 effectively expand the heat transfer path and heat exchange area of ​​the heat sink 3, thereby efficiently dissipating heat from the light-emitting module 102.

[0052] Preferably, the heat dissipation fins 321 are connected to the mounting plate 31. Since the mounting plate 31 provides mounting space for the light-emitting module 102 (i.e., the light-emitting module 102 is mounted on the mounting plate 31), by connecting the heat dissipation fins 321 to the mounting plate 31, a heat dissipation path can be effectively established between the light-emitting module 102 and the heat dissipation fins 321. This increases the heat exchange area of ​​the heat sink 3 through the heat dissipation fins 321, significantly improving the heat dissipation effect of the heat sink 3 on the light-emitting module 102.

[0053] Simulation analysis was conducted using simulation software (including but not limited to FloEFD software) to compare the traditional retractable recessed light 100 (i.e., the heat sink 3 is a closed heat sink 3, without heat dissipation fins 321 and ventilation slots 34) with the retractable recessed light 100 of this application. The simulation environment temperature was set to 25℃, the heat dissipation metal material of the heat sink 3 and guide 1 of the retractable recessed light 100 of this application was ADC12, the total light power was 30 watts, and other parameters were kept consistent during the simulation. The following results were obtained: like Figure 10 As shown, the solder joint (Tsp) temperature measured by the conventional retractable recessed light 100 is approximately 69.42℃; Figure 11 As shown, the retractable recessed light 100 of this application has a heat sink 3 equipped with heat dissipation fins 321 and ventilation slots 34, and its measured solder joint (Tsp) temperature is approximately 62.36℃. Compared to a conventional retractable recessed light 100, the temperature of the retractable recessed light 100 equipped with heat dissipation fins 321 and ventilation slots 34 in this application decreases by approximately 7.06℃, a reduction of 15.89%. [The simulated ambient temperature is 25℃], and the heat dissipation optimization effect is significant.

[0054] Preferably, along the axial direction of the radiator 3, the thickness of the heat dissipation fins 321 gradually decreases from the mounting plate 31 towards the tail end of the radiator 3. This design ensures that the radiator 3 has sufficient heat exchange area, allows for reasonable material usage in the radiator 3, reduces production costs, and contributes to the lightweight design of the radiator 3.

[0055] In addition, as an optional solution (hereinafter referred to as "Solution 1"), the ventilation slot 34 passes through the radiator 3 along the rotation axis of the radiator 3 and the connecting rod 22. In this case, the heat dissipation fins 321 can be understood as being horizontally distributed; such as Figure 12 As shown, the heat dissipation fins 321 are approximately perpendicular to the plane of the paper. As an alternative (hereinafter referred to as "Solution Two"), the heat dissipation fins 321 are approximately perpendicular to the rotation axis of the heat sink 3 and the connecting rod 22. In this case, the heat dissipation fins 321 can be understood as being vertically distributed; as shown... Figure 13 As shown, the heat dissipation fins 321 are roughly parallel to the plane of the paper. Therefore, the heat dissipation fins 321 can provide different heat dissipation effects through different arrangements, which on the one hand improves the design and manufacturing flexibility of the lamp unit 101, and on the other hand can meet different heat dissipation requirements.

[0056] Of these, Scheme 2 achieves a better heat dissipation effect than Scheme 1, as detailed below: Simulation analysis of the two schemes using simulation software (including but not limited to FloEFD software) shows that, under the same conditions, when the heat dissipation fins 321 are arranged horizontally (i.e., Scheme 1), the arrangement direction of the heat dissipation fins 321 is perpendicular to the direction of gravity. Therefore, the airflow between the heat dissipation fins 321 is obstructed in the direction of gravity, resulting in slower airflow, a lower convective heat transfer coefficient, and a worse heat dissipation effect (simulation results can be found in [reference needed]). Figure 12 Under the same parameters, the measured temperature was approximately 64.34℃. However, when the heat dissipation fins 321 are arranged vertically (i.e., Scheme Two), the arrangement direction of the heat dissipation fins 321 is consistent with the direction of gravity. This causes the airflow velocity between the heat dissipation fins 321 to increase due to the influence of gravity and temperature gradient, thereby improving the convective heat transfer coefficient and resulting in better heat dissipation (simulation results can be found in [reference]). Figure 13 Under the same parameter conditions, the measured temperature was approximately 62.36℃.

[0057] It should be noted that in this embodiment, the guide rail 12 of the guide member 1 is provided with heat dissipation ribs 122, and the radiator 3 is provided with heat dissipation fins 321 and ventilation slots 34. Therefore, compared with the traditional telescopic recessed light (which has no heat dissipation ribs on the guide rail of the guide member and no heat dissipation fins and ventilation slots on the radiator), the overall heat dissipation effect of the telescopic recessed light 100 in this embodiment can be improved by 30.76% (14.87% + 15.89% as mentioned above), and the heat dissipation effect is significantly improved.

[0058] Of course, in some embodiments, the retractable recessed light 100 may only retain the design of having heat dissipation fins 122 on the guide rail 12 or heat dissipation fins 321 and ventilation slots 34 on the radiator 3. In this case, its heat dissipation effect will be weaker than that in this embodiment, but it is still better than the traditional retractable recessed light.

[0059] The face ring 4 includes a second ring portion 41 and an eave portion 42. The second ring portion 41 is detachably fitted around the outer periphery of the first ring portion 11 of the guide member 1. Preferably, the second ring portion 41 and the first ring portion 11 are connected by a snap-fit ​​structure, which makes disassembly, assembly, and maintenance of both more convenient, requires fewer parts during assembly, eliminates the need for special tools, reduces production costs, and simplifies the assembly process. The eave portion 42 is located at the bottom of the second ring portion 41 and surrounds the second ring portion 41.

[0060] The number of spring clips is two or more, and the two or more elastic clips are evenly distributed along the circumference of the second ring portion 41. In this embodiment, the number of spring clips is two. The spring clips are installed on the second ring portion 41, and a clamping position is formed between the spring clips and the eaves portion 42 so that the lamp body unit 101 can be reliably fixed in the external structure (such as a pre-set mounting hole in the ceiling). The face ring 4 cooperates with the spring clips to fix the lamp body unit 101 to the external structure (such as the ceiling). At the same time, the addition of the face ring 4 can simplify the production difficulty of the guide 1 and the production cost of the lamp body unit 101, and also help to reduce the overall weight of the lamp body unit 101, thereby optimizing the production of the lamp body unit 101.

[0061] In one optional configuration, the second ring 41 is rotatably connected to the first ring 11. In this case, the connecting rod 22 on the connector 2 can be integrally formed with the body of the connector 2, or the connecting rod 22 can be fixedly connected to the body. Alternatively, when the second ring 41 and the first ring 11 cannot rotate relative to each other, the connecting rod 22 is separately set from the body of the connector 2, and the connecting rod 22 is rotatably connected to the body. Both configurations allow the circumferential illumination angle of the light-emitting module 102 to be adjustable after the heat sink 3 has completely moved below the face ring 4.

[0062] In summary, the design of the lamp body unit 101 of the retractable recessed lamp 100 can effectively improve the heat dissipation effect of the light-emitting module 102 and extend its service life. In addition, the size of the retractable recessed lamp 100 can be made smaller and lighter, making it easier to adapt to complex installation environments. Furthermore, the power can be increased to meet more lighting needs. Moreover, less heat dissipation material can be used to achieve the desired heat dissipation effect, reducing production costs.

[0063] Finally, it should be emphasized that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., 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. Lamp body unit, including: A guide member, the guide member comprising a first ring portion and two or more guide rails distributed circumferentially along the first ring portion, the guide rails being provided with a first mating portion; A connector is disposed within the space enclosed by the guide rails, and the connector is provided with a second mating part that mates with the first mating part. The connector can slide along the guide rails. A radiator, the tail end of which is rotatably connected to the connector; Its features are: The guide member is made of a heat-dissipating metal material, and the inner side of the guide rail is provided with heat dissipation ribs extending in their own extension direction. When the heat sink is located in the space, the heat dissipation ribs are adjacent to the heat sink; and / or The radiator has a heat dissipation cavity at its tail end, and multiple parallel heat dissipation fins are provided inside the heat dissipation cavity. The radiator has a ventilation groove that penetrates the cavity wall between two adjacent heat dissipation fins.

2. The lamp body unit according to claim 1, characterized in that: The radiator is cylindrical and has an internal mounting plate that divides the interior of the radiator into a receiving cavity and a heat dissipation cavity. The heat dissipation fins are connected to the mounting plate.

3. The lamp body unit according to claim 2, characterized in that: The heat dissipation fins are perpendicular to the rotation axis of the heat sink; or The ventilation slot extends through the radiator along the axis of rotation.

4. The lamp body unit according to claim 3, characterized in that: Along the axial direction of the radiator, the thickness of the heat dissipation fins gradually decreases from the mounting plate toward the tail end of the radiator.

5. The lamp body unit according to claim 4, characterized in that: The heat dissipation metal material is an aluminum-silicon alloy, an aluminum alloy, a copper alloy, or copper. The radiator is made of the heat-dissipating metal material.

6. The lamp body unit according to claim 1, characterized in that: The first mating part includes a plurality of slots, and the plurality of slots are distributed along the extending direction; The second mating part includes two or more first elastic claws, each of which corresponds to one or more guide rails. The first elastic claw engages with any of the slots of the corresponding guide rail.

7. The lamp body unit according to claim 6, characterized in that: Each of the guide rails is provided with two heat dissipation ribs, and the slot is located between the two heat dissipation ribs.

8. The lamp body unit according to claims 6 to 1, characterized in that: The inner ring of the first ring is provided with a limiting groove; The connector is provided with a second elastic claw, which can be moved to engage with the limiting groove.

9. The lamp body unit according to any one of claims 1 to 8, characterized in that: The lamp body unit also includes: A face ring, the face ring including a second ring portion and an eave portion, the second ring portion being detachably fitted around the outer periphery of the first ring portion, and the eave portion being located at the bottom of the second ring portion and surrounding the second ring portion; Two or more spring clips are installed on the second ring portion, and a clamping position is formed between the spring clips and the eaves portion.

10. A retractable recessed light, comprising a light-emitting module, characterized in that, It also includes a lamp body unit as described in any one of claims 1 to 9, wherein the light-emitting module is installed inside the heat sink, and the light-emitting end of the light-emitting module is disposed facing the front end of the heat sink.

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