Heat dissipation structure of LED (light-emitting diode) plastic-coated aluminum bulb lamp

Abstract

The invention discloses a heat dissipation structure of an LED plastic-coated aluminum bulb lamp, and belongs to the technical field of LED lamps. Through the arrangement of a heat dissipation mechanism and a driving mechanism, when a light-emitting part is powered on, a heat dissipation cover is opened, a rotating button is rotated, a rotating disc rotates along with the rotating button, and a transmission gear on a first mounting plate is driven through a full rack in a limiting hole; through a transmission shaft, a second bevel gear and a first bevel gear, a first hinge shaft drives a first connecting piece to rotate with the first hinge shaft as the axis under the limitation of a first mounting groove, a heat dissipation cover is separated from the surface of a heat dissipation sheet and abuts against the first mounting groove after rotating to the maximum angle, the surface of the heat dissipation sheet is not shielded, and heat dissipation is enhanced; when the rotary button is rotated reversely, the heat dissipation cover resets and is attached to the surface of the heat dissipation sheet to serve as an outer layer protection structure to protect the lamp component.

Description

Technical Field

[0001] This invention relates to the field of electrical cable manufacturing technology, and in particular to a heat dissipation structure for an LED plastic-coated aluminum bulb. Background Technology

[0002] LED plastic-coated aluminum bulb is an energy-saving lighting fixture that combines the advantages of plastic and aluminum. Its core design achieves a balance between efficient heat dissipation, safety protection, and environmental protection and energy saving through the "outer plastic and inner aluminum" structure. The outer plastic layer is usually made of flame-retardant PBT (polybutylene terephthalate) or PC (polycarbonate), which has good sealing performance and a smooth surface, and is safe for insulation. The inner aluminum layer is made of stretched aluminum or precision-machined aluminum, which forms the heat dissipation core and can quickly conduct the heat generated by the LED chip to the outer shell, forming a composite structure of "aluminum thermal conductivity + plastic protection", which not only ensures heat dissipation efficiency, but also avoids the safety hazards that may be caused by direct exposure of aluminum. However, in actual use, the plastic shell will block the path of heat radiation and heat dissipation, and the convection heat dissipation will almost stop. Relying solely on radiation and the low efficiency of plastic conduction will indirectly affect the heat dissipation efficiency of aluminum. Therefore, it is still necessary to design heat dissipation holes or gaps on the outer plastic to reduce the impact on heat dissipation and allow the aluminum to be directly exposed to the air, which can maximize the use of convection heat dissipation, especially suitable for high-power lamps. However, long-term use can easily lead to dust accumulation or insects entering, affecting heat dissipation and lifespan. Therefore, a heat dissipation structure is needed that can open the outer casing to enhance heat dissipation when the light is on, and close the outer casing for protection when the light is off, so as to conduct away the remaining heat and achieve continuous heat dissipation. Summary of the Invention

[0003] The purpose of this invention is to address the problem that plastic casings block the path of heat radiation and almost stop convective heat dissipation, thus affecting the heat dissipation efficiency of aluminum materials. Exposing aluminum materials directly to the air can maximize the use of convective heat dissipation, but long-term use can easily lead to dust accumulation or the entry of insects, affecting heat dissipation and lifespan. Therefore, this invention proposes a heat dissipation structure for LED plastic-coated aluminum bulbs.

[0004] To achieve the above objectives, the present invention employs the following technology for a heat dissipation structure of an LED plastic-coated aluminum bulb: The lamp includes a lamp body, which includes a lamp holder. The lamp holder is connected to a light-emitting element via a mounting platform. The light-emitting element is cooled by a heat dissipation mechanism mounted on the mounting platform. The heat dissipation mechanism includes an annular heat sink mounted on the mounting platform, and four heat dissipation covers are attached to the surface of the heat sink. The four heat dissipation covers are combined into a ring to seal the gap between the lamp holder and the mounting platform. In addition, four first rotating parts are installed on the mounting platform and connected to four heat sinks respectively. When the light-emitting element is turned on, the heat sink rotates around the first rotating parts as the axis and disengages from the heat sink. The heat sink is adjusted to the open state and the convection heat dissipation is enhanced by the arc surface. The installation platform is also equipped with a protective mechanism, which includes four second rotating parts that are alternately arranged with the heat sink. Each second rotating part is rotatably equipped with a protective plate that can be combined with the four open heat sinks to form a wave-shaped diffuser.

[0005] Further description of the heat dissipation structure of an LED plastic-coated aluminum bulb as described above: The first rotating component includes a first mounting plate mounted on a mounting platform. The first mounting plate is mounted with a first connecting component via a first hinge shaft that is rotatably configured. A heat sink is mounted on the first connecting component. The mounting platform is provided with a first mounting groove to avoid collision with the first connector during rotation. After the heat sink is rotated to its maximum angle, it abuts against the first mounting groove.

[0006] Further description of the heat dissipation structure of an LED plastic-coated aluminum bulb as described above: The second rotating component includes a second mounting plate mounted on the mounting platform. The second mounting plate is mounted with a second connecting rod via a second hinge shaft that is rotatably configured. The second connecting rod is connected to the guard plate via a support rod. The protective mechanism also includes a second mounting slot that alternates with the four heat sinks to avoid contact with the rotating support rod.

[0007] Further description of the heat dissipation structure of an LED plastic-coated aluminum bulb as described above: The guard plate includes a fixed guard plate fixedly connected to the support rod, and a first movable guard plate and a second movable guard plate are respectively movably nested on both sides of the fixed guard plate; The first and second movable guard plates rotate from their retracted state to between the two heat sinks and then unfold, so that the first and second movable guard plates fit into the two heat sinks respectively.

[0008] Further description of the heat dissipation structure of an LED plastic-coated aluminum bulb as described above: The first and second movable guard plates are deployed and retracted via a deflection mechanism. The deflection mechanism includes a positioning shaft mounted on a support rod, the axis of which coincides with the axis of the fixed guard plate. A first collar and a second collar are rotatably sleeved on the positioning shaft, and the first collar and the second collar are respectively connected to the first movable guard plate and the second movable guard plate via brackets.

[0009] Further description of the heat dissipation structure of an LED plastic-coated aluminum bulb as described above: The first and second rings are driven to rotate by a guide mechanism. The guide mechanism includes a curved plate on the second mounting plate. The inner diameter of the curved plate is the same as the outer diameter of the first and second rings, and a first guide hole and a second guide hole are respectively opened on both sides. Both the first and second collars are provided with guide shafts that pass through the first and second guide holes. When the first and second collars revolve around the second hinge axis with the positioning axis, the first and second guide holes drive the first and second collars to rotate around the positioning axis through the guide shafts.

[0010] Further description of the heat dissipation structure of an LED plastic-coated aluminum bulb as described above: Both the first guide hole and the second guide hole include a starting section, a middle section, and an ending section; When the guide shaft is located at the beginning and end positions, the first and second movable guard plates are in the unfolded state. When the guide shaft is in the middle position, the first movable guard plate and the second movable guard plate are in a retracted state. When the guide shaft is located in the middle section and moves towards the beginning and end sections, the first and second movable guard plates transition from a retracted state to an unfolded state.

[0011] Further description of the heat dissipation structure of an LED plastic-coated aluminum bulb as described above: The guiding mechanism also includes a torsion spring wound around the positioning shaft. A countersunk hole is provided at the contact position between the first and second collars. The torsion spring is disposed in the countersunk hole and is connected to the first and second collars respectively.

[0012] Further description of the heat dissipation structure of an LED plastic-coated aluminum bulb as described above: The four first and second hinge shafts are all driven to rotate by a drive mechanism. The drive mechanism includes a first bevel gear sleeved on the first and second hinge shafts, and a transmission shaft rotatably mounted on the first and second mounting plates. The two ends of the transmission shaft are respectively provided with a transmission gear and a second bevel gear meshing with the first bevel gear. The mounting platform is equipped with a turntable that rotates within it. The turntable has eight limiting holes corresponding to the positions of the transmission gears. Full racks and half racks are alternately arranged in the limiting holes. The full racks mesh with the transmission gears on the first mounting plate, and the half racks mesh with the transmission gears on the second mounting plate.

[0013] Further description of the heat dissipation structure of an LED plastic-coated aluminum bulb as described above: The mounting platform has a through hole with the same shape as the limiting hole, and a knob that is rotatably set at the bottom of the mounting platform passes through the through hole and is connected to the turntable.

[0014] One of the above technical solutions has the following advantages or beneficial effects: 1. Through the heat dissipation mechanism and drive mechanism, when the light-emitting element is powered on, the heat sink opens. By rotating the knob, the turntable rotates accordingly. The transmission gear on the first mounting plate is driven by the rack and pinion in the limiting hole. Through the transmission shaft, the second bevel gear, and the first bevel gear, the first hinge shaft drives the first connecting piece to rotate around the first hinge shaft under the restriction of the first mounting groove. The heat sink separates from the surface of the heat sink and abuts against the first mounting groove after rotating to the maximum angle. The surface of the heat sink is unobstructed, which enhances heat dissipation. When the light-emitting element is not powered, the knob is rotated in the opposite direction, and the heat sink returns to its original position and fits against the surface of the heat sink, serving as an outer protective structure to protect the lamp components. 2. Through the heat dissipation mechanism and the protective mechanism, the protective plate is rotated by turning the knob. The positioning shaft revolves around the second hinge shaft. The first guide hole and the second guide hole drive the first collar and the second collar to rotate around the positioning shaft through the guide shaft. The first movable protective plate and the second movable protective plate rotate and unfold on the surface of the fixed protective plate, and combine with the heat dissipation cover to form a wave-shaped soft light cover. When the light-emitting element is not powered, the protective plate is reset. The four second rotating parts arranged around it protect the light-emitting element and the bulb. At this time, the first movable protective plate and the second movable protective plate are in the unfolded state. Attached Figure Description

[0015] Figure 1 A three-dimensional structural diagram of the LED lamp body is shown; Figure 2 A three-dimensional structural diagram of the heat sink in its closed state is shown; Figure 3 A three-dimensional structural diagram of the protective plate in its protected state is shown; Figure 4 A three-dimensional structural diagram of the combination of heat sink and protective plate as a light-concentrating cover is shown; Figure 5 A three-dimensional structural schematic diagram of the first rotating component is shown; Figure 6 A three-dimensional structural diagram of the installation platform is shown; Figure 7 A three-dimensional structural diagram showing the simultaneous opening of the heat sink and the lifting of the protective plate is shown. Figure 8 A three-dimensional structural schematic diagram of the second rotating component and the guard plate is shown; Figure 9 A partial three-dimensional structural schematic diagram of the second rotating component and the guiding mechanism is shown; Figure 10 A three-dimensional structural diagram of the first and second movable guard plates in their retracted states is shown. Figure 11 A three-dimensional structural diagram of the first and second movable guard plates in their deployed states is shown. Figure 12 A three-dimensional structural schematic diagram of the guiding mechanism is shown; Figure 13 A front view cross-sectional structural schematic diagram of the guide mechanism is shown; Figure 14 A front view cross-sectional structural diagram of the deflection mechanism and the guide mechanism is shown when the guard plate is in the protective state; Figure 15 A front cross-sectional view of the deflection mechanism and guide mechanism is shown when the guard plate is in the retracted state. Figure 16 A front view cross-sectional schematic diagram of the deflection mechanism and the guide mechanism is shown when the guard plate is in the raised state; Figure 17 A side view sectional structural schematic diagram of the deflection mechanism and the guiding mechanism is shown; Figure 18 A partial three-dimensional cross-sectional structural schematic diagram of the drive mechanism is shown; Figure 19 It shows Figure 6 A magnified structural diagram of point A in the middle.

[0016] Legend: 10. Lamp body; 11. Lamp holder; 12. Mounting platform; 13. Light-emitting component; 20. Heat dissipation mechanism; 21. Heat sink; 22. First mounting slot; 23. First rotating component; 231. First mounting plate; 232. First hinge shaft; 233. First connecting component; 24. Heat sink cover; 30. Protective mechanism; 31. Second mounting slot; 32. Second rotating component; 321. Second mounting plate; 322. Second hinge shaft; 323. Second connecting rod; 324. Support rod; 33. Guard plate; 331. Fixed guard plate; 332. First movable guard plate; 333. Second movable guard plate; 40. Deflection mechanism; 41. Positioning shaft; 42. First collar; 43. Second collar; 44. Bracket; 50. Guide mechanism; 51. Curved plate; 52. First guide hole; 53. Second guide hole; 54. Through hole; 55. Guide shaft; 56. Torsion spring; 60. Drive mechanism; 61. First bevel gear; 62. Second bevel gear; 63. Drive shaft; 64. Drive gear; 65. Knob; 66. Turntable; 67. Limiting hole; 68. Full rack; 69. Half rack. Detailed Implementation

[0017] The heat dissipation structure of an LED plastic-coated aluminum bulb according to the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0018] To address the issue that plastic casings block heat radiation and almost completely stop convection, thus affecting the heat dissipation efficiency of aluminum, and that directly exposing the aluminum to the air maximizes convection, but prolonged use can lead to dust accumulation and insect intrusion, impacting heat dissipation and lifespan, this invention proposes a heat dissipation structure for an LED plastic-coated aluminum bulb. Figure 1 - Figure 19 As shown: The lamp includes a lamp body 10, which includes a lamp holder 11. The lamp holder 11 is connected to a light-emitting element 13 via a mounting platform 12. The light-emitting element 13 is cooled by a heat dissipation mechanism 20 mounted on the mounting platform 12. The heat dissipation mechanism 20 includes an annular heat sink 21 mounted on the mounting platform 12, and four heat dissipation covers 24 are attached to the surface of the heat sink 21. The four heat dissipation covers 24 are combined into a ring to seal the gap between the lamp holder 11 and the mounting platform 12. Figure 2 As shown, when the light-emitting element 13 is not powered, the heat sink 24 serves as an outer protective structure, which can protect the components of the lamp body 10 from collisions, scratches, and intrusion of dust and impurities from external objects, thus extending its service life. like Figure 5 and Figure 7 As shown, the heat dissipation mechanism 20 also includes four first rotating members 23 mounted on the mounting platform 12 and respectively connected to four heat dissipation covers 24. When the light-emitting element 13 is turned on, the heat dissipation cover 24 rotates about the first rotating member 23 as the axis and disengages from the heat sink 21. The first rotating member 23 includes a first mounting plate 231 mounted on the mounting platform 12. The first mounting plate 231 is mounted with a first connecting member 233 through a first hinge shaft 232 that is rotatably set. The heat dissipation cover 24 is mounted on the first connecting member 233. The mounting platform 12 is provided with a first mounting groove 22 to avoid the first connecting member 233 from rotating and colliding. By rotating the first connecting member 233, the first connecting member 233 is rotated about the first hinge shaft 232 as the axis under the restriction of the first mounting plate 231, so that the heat dissipation cover 24 separates from the surface of the heat sink 21 and opens. After the heat dissipation cover 24 rotates to the maximum angle, it abuts against the first mounting groove 22. At this time, the heat dissipation cover 24 is adjusted to the open state. The surface of the heat sink 21 is unobstructed and directly in contact with the air. The effect of air flow carrying away heat and dissipating heat in the form of electromagnetic waves is the best. Meanwhile, the heat sink 24 guides the opposing airflow through the arc surface that fits against the heat sink 21, actively guiding the airflow to contact the heat sink 21, thereby enhancing the effect of convective heat dissipation.

[0019] Furthermore, such as Figure 3 and Figure 4 As shown, the mounting platform 12 is also equipped with a protective mechanism 30. The protective mechanism 30 includes four second rotating parts 32 that are alternately arranged with the heat sink 24. A protective plate 33 is rotatably arranged on the second rotating parts 32. When the light-emitting element 13 is not powered, the four second rotating parts 32 arranged around it protect the light-emitting element 13 and the bulb installed on the light-emitting element 13. When subjected to external impact, the arc surface of the protective plate 33 can disperse the impact force along its curved surface, reduce the impact force per unit area, and thus enhance the overall impact resistance. like Figure 9 As shown, the second rotating component 32 includes a second mounting plate 321 mounted on the mounting platform 12. The second mounting plate 321 is mounted with a second connecting rod 323 via a second hinge shaft 322 that is rotatably set. The second connecting rod 323 is connected to the guard plate 33 via a support rod 324. The protective mechanism 30 also includes a second mounting groove 31 that is alternately opened with the four heat sinks 21 to avoid contact with the rotating support rod 324. By rotating the second connecting rod 323, the second connecting rod 323 is made to rotate around the second hinge shaft 322 under the restriction of the second mounting plate 321. The second connecting rod 323 drives the guard plate 33 to rotate via the support rod 324 to adjust its position. Preferred, such as Figure 4 As shown, the four protective plates 33, after being rotated to the designated position, can be combined with the four heat sinks 24 rotated to the open state to form a wave-shaped soft light cover. In order to improve the light-gathering effect, the side of the soft light cover formed by the heat sink 24 and the protective plates 33 is made of a material with light-diffusing properties, so that the more concentrated and dazzling light emitted by the light-emitting element 13 is diffused, so as to make the light distribution more uniform and reduce glare.

[0020] Furthermore, such as Figure 8 As shown, in order to ensure a tight fit between the heat sink 24 and the protective plate 33 and to prevent hard contact between the heat sink 24 and the protective plate 33 during rotation and adjustment, the protective plate 33 includes a fixed protective plate 331 fixedly connected to the support rod 324. The fixed protective plate 331 has a first movable protective plate 332 and a second movable protective plate 333 movably nested on both sides. By rotating the first movable protective plate 332 and the second movable protective plate 333 in a retracted state between the two heat sinks 24 and then unfolding them, collisions can be avoided. The first movable protective plate 332 and the second movable protective plate 333 are respectively fitted to the two heat sinks 24 and combined to form a wave-shaped soft light cover.

[0021] In order to control the rotation timing of the first movable guard plate 332 and the second movable guard plate 333, such as Figure 10 and Figure 11 As shown, the first movable guard plate 332 and the second movable guard plate 333 are unfolded and retracted by the deflection mechanism 40. The deflection mechanism 40 includes a positioning shaft 41 mounted on the support rod 324 and whose axis coincides with the axis of the fixed guard plate 331. A first collar 42 and a second collar 43 are rotatably sleeved on the positioning shaft 41. The first collar 42 and the second collar 43 are connected to the first movable guard plate 332 and the second movable guard plate 333 respectively through the bracket 44. With this design, when the first ring 42 rotates around the positioning shaft 41, the second ring 43 rotates in the opposite direction around the positioning shaft 41. The first ring 42 and the second ring 43 drive the first movable guard plate 332 and the second movable guard plate 333 to rotate and unfold on the surface of the fixed guard plate 331 through the bracket 44, thereby achieving the purpose of controlling the position of the first movable guard plate 332 and the second movable guard plate 333. Furthermore, such as Figures 12-16 As shown, the first ring 42 and the second ring 43 are driven to rotate by the guide mechanism 50. The guide mechanism 50 includes a curved plate 51 disposed on the second mounting plate 321. The inner diameter of the curved plate 51 is the same as the outer diameter of the first ring 42 and the second ring 43, and a first guide hole 52 and a second guide hole 53 are respectively opened on both sides. Both the first collar 42 and the second collar 43 are provided with guide shafts 55 passing through the first guide hole 52 and the second guide hole 53. The first guide hole 52 and the second guide hole 53 each include a starting section, a middle section, and an end section. Through this design, when the first collar 42 and the second collar 43 revolve around the positioning shaft 41 about the second hinge shaft 322, the first guide hole 52 and the second guide hole 53 drive the first collar 42 and the second collar 43 to rotate about the positioning shaft 41 via the guide shaft 55. When the guide shaft 55 is in the starting section position, the first... When the movable guard plate 332 and the second movable guard plate 333 are in the unfolded state, the guard plate 33 is located at the position protecting the light-emitting component 13. When the guide shaft 55 is at the end position, the first movable guard plate 332 and the second movable guard plate 333 are in the unfolded state. At this time, the guard plate 33 and the heat sink 24 are combined to form a wave-shaped soft light cover. When the guide shaft 55 is in the middle position and moves towards the beginning and end positions, the first movable guard plate 332 and the second movable guard plate 333 transition from the retracted state to the unfolded state. At this time, the guard plate 33 is in the process of rotation.

[0022] It should be noted that since the axis of rotation of the support rod 324 does not coincide with the axis of rotation of the curved plate 51, a through hole 54 is provided in the middle of the curved plate 51 to ensure that the support rod 324 does not contact the curved plate 51 during rotation. Therefore, the guide shaft 55 needs to abut against the side of the first guide hole 52 and the second guide hole 53 away from the through hole 54, and rotate around the positioning shaft 41 under the guidance of the first guide hole 52 and the second guide hole 53. To limit the movement trajectory of the guide shaft 55, the guide mechanism 50 also includes a torsion spring 56 wound around the positioning shaft 41. A countersunk hole is provided at the contact position of the first collar 42 and the second collar 43. The torsion spring 56 is disposed in the countersunk hole and connected to the first collar 42 and the second collar 43 respectively. Through this design, as the guide shaft 55 moves from the middle position to the beginning and end positions, the first collar 42 and the second collar 43 can always apply a thrust to the guide shaft 55 with the cooperation of the torsion spring 56, so as to keep the inner wall of the first guide hole 52 and the second guide hole 53 away from the through hole 54, thereby achieving the purpose of limiting the movement trajectory of the guide shaft 55.

[0023] In order to control the rotation of the heat sink 24 and the protective plate 33, such as Figure 5 , Figure 6 , Figure 9 , Figure 18 and Figure 19 As shown, the four first hinge shafts 232 and the four second hinge shafts 322 are all driven to rotate by the drive mechanism 60. The drive mechanism 60 includes a first bevel gear 61 sleeved and mounted on the first hinge shafts 232 and the second hinge shafts 322. A transmission shaft 63 is rotatably mounted on the first mounting plate 231 and the second mounting plate 321. A transmission gear 64 and a second bevel gear 62 that mesh with the first bevel gear 61 are respectively provided at both ends of the transmission shaft 63. The mounting platform 12 is equipped with a turntable 66 that rotates within it. The turntable 66 has eight limiting holes 67 that correspond to the positions of the transmission gears 64. Full racks 68 and half racks 69 are alternately arranged in the limiting holes 67. The full racks 68 mesh with the transmission gears 64 on the first mounting plate 231, and the half racks 69 mesh with the transmission gears 64 on the second mounting plate 321. By rotating the turntable 66, the turntable 66 drives the full rack 68 and half rack 69 to rotate through the limiting hole 67, and drives the transmission gear 64 that meshes with it to rotate. The transmission gear 64 transmits torque to the second bevel gear 62 through the transmission shaft 63, and the second bevel gear 62 drives the first hinge shaft 232 and the second hinge shaft 322 to rotate through the meshing first bevel gear 61, thereby achieving the purpose of rotating the heat sink 24 and the protective plate 33. It should be noted that, due to the different rotation angles of the heat sink 24 and the protective plate 33, the half rack 69 delays driving the transmission gear 64 on the second mounting plate 321. When the full rack 68 has driven the transmission gear 64 on the first mounting plate 231 to rotate more than halfway, the half rack 69 begins to drive the transmission gear 64 on the second mounting plate 321 to rotate. Figure 7 As shown, at this time, the heat sink 24, which has rotated more than halfway, intersects with the protective plate 33, and the first movable protective plate 332 and the second movable protective plate 333 are transitioning from the unfolded state to the retracted state, thereby avoiding contact between the heat sink 24 and the protective plate 33; when the heat sink 24 rotates to the position of fitting with the first mounting groove 22, the first movable protective plate 332 and the second movable protective plate 333 complete the transition from the retracted state to the unfolded state. At this time, the first movable protective plate 332 and the second movable protective plate 333 respectively fit with the adjacent heat sink 24, completing the combination of the wave-shaped diffuser.

[0024] Furthermore, the mounting platform 12 has a through hole with the same shape as the limiting hole 67 (not shown in the figure). A knob 65, which is rotatably mounted at the bottom of the mounting platform 12, passes through the through hole and is connected to the turntable 66. By rotating the knob 65, the knob 65 can drive the turntable 66 to rotate while the rotation angle is limited by the through hole.

[0025] Working principle: When the light-emitting element 13 is powered on, the heat sink 24 opens. By rotating the knob 65, the turntable 66 rotates accordingly. The full rack 68 in the limiting hole 67 drives the transmission gear 64 on the first mounting plate 231. Through the transmission shaft 63, the second bevel gear 62, and the first bevel gear 61, the first hinge shaft 232 drives the first connecting piece 233 to rotate around the first hinge shaft 232 under the restriction of the first mounting groove 22. The heat sink 24 separates from the surface of the heat sink 21 and abuts against the first mounting groove 22 after rotating to the maximum angle. The surface of the heat sink 21 is unobstructed, which enhances heat dissipation. By rotating the knob 65, the full rack 68 drives the transmission gear 64 on the first mounting plate 231 to rotate more than halfway. The half rack 69 then starts to drive the transmission gear 64 on the second mounting plate 321. Through the transmission shaft 63, the second bevel gear 62, and the first bevel gear 61, the second hinge shaft 322 drives the second connecting rod 323 to rotate around the second hinge shaft 322 under the constraint of the second mounting groove 31. This rotation drives the guard plate 33 to rotate through the support rod 324. When the support rod 324 rotates, the positioning shaft 41 revolves around the second hinge shaft 322. The first guide hole 52 and the second guide hole 53 drive the first collar 42 and the second collar 43 to rotate around the positioning shaft 41 through the guide shaft 55. The first movable guard plate 332 and the second movable guard plate 333 rotate and unfold on the surface of the fixed guard plate 331, and combine with the heat sink 24 to form a wave-shaped soft light cover. When the light-emitting component 13 is not powered, the knob 65 is rotated in the opposite direction, the heat sink 24 is reset and attached to the surface of the heat sink 21, serving as an outer protective structure to protect the lamp components. When the guard plate 33 is reset, the four second rotating parts 32 arranged around it protect the light-emitting element 13 and the bulb. At this time, the first movable guard plate 332 and the second movable guard plate 333 are in the unfolded state. The guard plate 33 is located in the position to protect the light-emitting element 13. The arc surface of the guard plate 33 disperses the impact force and enhances the impact resistance.

[0026] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the heat dissipation structure of an LED plastic-coated aluminum bulb and its inventive concept, should be covered within the scope of protection of the present invention.

Claims

1. A heat dissipation structure for an LED plastic-coated aluminum bulb, comprising a lamp body (10), the lamp body (10) including a lamp holder (11), the lamp holder (11) being connected to a light-emitting element (13) via a mounting platform (12), characterized in that, The light-emitting element (13) dissipates heat through a heat dissipation mechanism (20) installed on the mounting platform (12); The heat dissipation mechanism (20) includes an annular heat sink (21) installed on the mounting platform (12), and four heat sink covers (24) are attached to the surface of the heat sink (21). The four heat sink covers (24) are combined into an annular shape to seal the gap between the lamp holder (11) and the mounting platform (12). In addition, four first rotating parts (23) are installed on the mounting platform (12) and connected to four heat sinks (24) respectively. When the light-emitting part (13) is turned on, the heat sink (24) rotates about the first rotating part (23) and disengages from the heat sink (21). The heat sink (24) is adjusted to the open state and the convection heat dissipation is enhanced by the arc surface. The installation platform (12) is also provided with a protective mechanism (30). The protective mechanism (30) includes four second rotating parts (32) that are alternately arranged with the heat sink (24). The second rotating parts (32) are rotatably provided with a protective plate (33) that can be combined with the four open heat sinks (24) to form a wave-shaped soft light cover.

2. The heat dissipation structure of an LED plastic-coated aluminum bulb according to claim 1, characterized in that, The first rotating component (23) includes a first mounting plate (231) mounted on the mounting platform (12). The first mounting plate (231) is mounted with a first connector (233) via a first hinge shaft (232) that is rotatably set. A heat sink (24) is mounted on the first connector (233). The mounting platform (12) is provided with a first mounting groove (22) to avoid the first connector (233) from rotating and colliding. After the heat sink (24) rotates to the maximum angle, it abuts against the first mounting groove (22).

3. The heat dissipation structure of an LED plastic-coated aluminum bulb according to claim 2, characterized in that, The second rotating component (32) includes a second mounting plate (321) mounted on the mounting platform (12). The second mounting plate (321) is mounted with a second connecting rod (323) via a second hinge shaft (322) that is rotatably set. The second connecting rod (323) is connected to the guard plate (33) via a support rod (324). The protective mechanism (30) also includes a second mounting slot (31) alternately provided with the four heat sinks (21) to avoid contact with the rotating support rod (324).

4. The heat dissipation structure of an LED plastic-coated aluminum bulb according to claim 3, characterized in that, The guard plate (33) includes a fixed guard plate (331) fixedly connected to the support rod (324), and a first movable guard plate (332) and a second movable guard plate (333) are respectively movably nested on both sides of the fixed guard plate (331). The first movable guard plate (332) and the second movable guard plate (333) rotate in a retracted state between the two heat sinks (24) and then unfold, so that the first movable guard plate (332) and the second movable guard plate (333) respectively fit into the two heat sinks (24).

5. The heat dissipation structure of an LED plastic-coated aluminum bulb according to claim 4, characterized in that, The first movable guard plate (332) and the second movable guard plate (333) are deployed and retracted by a deflection mechanism (40); The deflection mechanism (40) includes a positioning shaft (41) mounted on the support rod (324) and whose axis coincides with the axis of the fixed guard plate (331). A first collar (42) and a second collar (43) are rotatably sleeved on the positioning shaft (41), and the first collar (42) and the second collar (43) are connected to the first movable guard plate (332) and the second movable guard plate (333) respectively through the bracket (44).

6. The heat dissipation structure of an LED plastic-coated aluminum bulb according to claim 5, characterized in that, The first collar (42) and the second collar (43) are driven to rotate by a guide mechanism (50). The guide mechanism (50) includes a curved plate (51) disposed on the second mounting plate (321). The inner diameter of the curved plate (51) is the same as the outer diameter of the first collar (42) and the second collar (43), and a first guide hole (52) and a second guide hole (53) are respectively opened on both sides. The first collar (42) and the second collar (43) are each provided with a guide shaft (55) that passes through the first guide hole (52) and the second guide hole (53). When the first collar (42) and the second collar (43) revolve around the second hinge shaft (322) with the positioning shaft (41), the first guide hole (52) and the second guide hole (53) drive the first collar (42) and the second collar (43) to rotate around the positioning shaft (41) through the guide shaft (55).

7. The heat dissipation structure of an LED plastic-coated aluminum bulb according to claim 6, characterized in that, The first guide hole (52) and the second guide hole (53) both include a starting section, a middle section and an ending section; When the guide shaft (55) is in the initial and final positions, the first movable guard plate (332) and the second movable guard plate (333) are in the unfolded state; When the guide shaft (55) is in the middle position, the first movable guard plate (332) and the second movable guard plate (333) are in a retracted state; When the guide shaft (55) is located in the middle section and moves towards the beginning and end sections, the first movable guard plate (332) and the second movable guard plate (333) transition from the retracted state to the unfolded state.

8. The heat dissipation structure of an LED plastic-coated aluminum bulb according to claim 6, characterized in that, The guide mechanism (50) also includes a torsion spring (56) wound on the positioning shaft (41). A countersunk hole is provided at the contact position between the first collar (42) and the second collar (43). The torsion spring (56) is disposed in the countersunk hole and is connected to the first collar (42) and the second collar (43) respectively.

9. The heat dissipation structure of an LED plastic-coated aluminum bulb according to claim 3, characterized in that, The four first hinge shafts (232) and second hinge shafts (322) are all driven to rotate by a drive mechanism (60). The drive mechanism (60) includes a first bevel gear (61) sleeved on the first hinge shaft (232) and the second hinge shaft (322). A transmission shaft (63) is rotatably disposed on the first mounting plate (231) and the second mounting plate (321). A transmission gear (64) and a second bevel gear (62) meshing with the first bevel gear (61) are respectively disposed at both ends of the transmission shaft (63). The mounting platform (12) is rotatably provided with a turntable (66). The turntable (66) has eight limiting holes (67) corresponding to the positions of the transmission gears (64). Full racks (68) and half racks (69) are alternately arranged in the limiting holes (67). The full racks (68) mesh with the transmission gears (64) provided on the first mounting plate (231), and the half racks (69) mesh with the transmission gears (64) provided on the second mounting plate (321).

10. The heat dissipation structure of an LED plastic-coated aluminum bulb according to claim 9, characterized in that, The mounting platform (12) has a through hole with the same shape as the limiting hole (67), and the knob (65) rotatably set at the bottom of the mounting platform (12) passes through the through hole and is connected to the turntable (66).

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