Illumination mechanism and lamp

Abstract

The present invention provides an illumination mechanism and a lighting fixture. The illumination mechanism includes at least two light source heat dissipation components, and two adjacent light source heat dissipation components are rotationally connected through a rotating shaft. Each light source heat dissipation component includes a plurality of heat dissipation fins and a light source board fixed on the heat dissipation fins. The heat dissipation fins of the light source heat dissipation components are arranged alternately in sequence along the stacking direction thereof. The illumination mechanism has a deployed position and a folded position, and the light-emitting surfaces of all the light source heat dissipation components face the object to be irradiated when in the deployed position. For the illumination mechanism and the lighting fixture provided by the present invention, when in the folded position, the heat dissipation fins of the two light source heat dissipation components overlap each other, which is convenient for packaging and transportation; when in the deployed position, the light-emitting surfaces of the two light source heat dissipation components both face the object to be irradiated, enabling the illumination mechanism to cover a larger illumination range, and the heat dissipation fins of the two light source heat dissipation components are staggered from each other, which can effectively improve the heat dissipation performance.

Description

Technical Field

[0001] The present invention belongs to the field of lighting technology, and more specifically, relates to a lighting mechanism and a lamp. Background Art

[0002] Existing lighting facilities, such as streetlights, are typically large in size to ensure that individual lighting fixtures cover a wide area. This makes packaging and transportation difficult and increases costs. Furthermore, streetlights emit light at all angles, and light emitted from the top of the fixture is reflected downward by the fixture's housing, resulting in significant light loss and poor heat dissipation. Summary of the Invention

[0003] The object of the present invention is to provide a lighting mechanism to solve the technical problems existing in the prior art, such as large lamp size, large light loss and poor heat dissipation performance.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a lighting mechanism, including at least two light source heat dissipation assemblies, two adjacent light source heat dissipation assemblies are rotatably connected by a rotating shaft, the light source heat dissipation assembly includes a plurality of stacked and spaced heat dissipation fins and a light source plate fixed on the heat dissipation fins, the heat dissipation fins of the light source heat dissipation assembly are staggered in sequence along their overlapping direction, the rotating shaft passes through each of the heat dissipation fins along the overlapping direction of the heat dissipation fins, so that the lighting mechanism has an expanded position in which the heat dissipation fins of each light source heat dissipation assembly are staggered with each other and a folded position in which the heat dissipation fins of each light source heat dissipation assembly overlap with each other, and the light-emitting surface of each light source heat dissipation assembly faces the object to be irradiated in the expanded position.

[0005] Furthermore, the heat sink is provided with a shaft hole for the shaft to rotate through and an angle limiting hole connected to the shaft hole, and a limiting strip is radially protruded from the surface of the shaft and extends into the angle limiting hole.

[0006] Furthermore, the heat sink is provided with a guide flange protruding from the inner walls of the shaft hole and the angle limiting hole to prevent the heat sink from shaking.

[0007] Furthermore, there are two light source heat dissipation assemblies, and the light emitting surfaces of the light source boards of the two light source heat dissipation assemblies are parallel to or arranged at an obtuse angle to each other in the unfolded position, and the light emitting surfaces of the light source boards of the two light source heat dissipation assemblies are in opposite directions in the folded position.

[0008] Furthermore, the light source heat dissipation assembly also includes a heat pipe passing through each of the heat sinks, and the heat sinks are respectively provided with through holes for the heat pipes to pass through. The heat sinks extend from the inner walls of the through holes to form a heat-conducting flange wrapped around the outer periphery of the heat pipes.

[0009] Further, the heat sink of one of the light source heat dissipation structures has an avoidance notch for avoiding the light source board of the other light source heat dissipation structure, and an avoidance hole for avoiding the heat pipe of the other light source heat dissipation structure.

[0010] Further, the heat sink has an installation side arranged as a flat surface, and the installation sides in the same light source heat dissipation assembly are arranged to form an installation surface for installing the light source board.

[0011] Further, the heat sink extends in its stacking direction to form a limiting portion for defining the distance between two adjacent heat sinks. The limiting portion is respectively provided with a protruding portion and a groove portion on opposite sides in the stacking direction of the heat sink, and the adjacent protruding portion and the groove portion are inserted into each other to prevent relative rotation of two adjacent heat sinks.

[0012] Further, the limiting portion extends vertically from the edge of the heat sink, and the edge of the heat sink also extends radially to form a hanging portion. A hanging hole for the hanging portion to extend into is provided on the protruding portion.

[0013] The present invention also provides a lamp, including the above-mentioned lighting mechanism, and further including a lamp head structure fixedly connected to the rotating shaft.

[0014] The beneficial effects of the lighting mechanism and the lamp provided by the present invention are as follows: Compared with the prior art, the lighting mechanism of the present invention includes at least two light source heat dissipation assemblies, and two adjacent light source heat dissipation assemblies are rotationally connected through a rotating shaft. Each light source heat dissipation assembly includes a plurality of heat sinks arranged at intervals in a stacked manner and a light source board fixed on the heat sink. The light emitted by the light source board has a directionality and less light loss. When the respective light source heat dissipation assemblies are rotated relative to each other to the folded position, the heat sinks of two adjacent light source heat dissipation assemblies overlap each other, reducing the overall volume of the lighting mechanism and facilitating packaging and transportation. When the respective light source heat dissipation assemblies are rotated relative to each other to the unfolded position, the light-emitting surfaces of the respective light source heat dissipation assemblies all face the object to be irradiated, enabling the lighting mechanism to cover a larger lighting range. Moreover, the heat sinks of the two light source heat dissipation assemblies are staggered from each other, increasing the heat dissipation area between the heat sinks and the air, and effectively improving the heat dissipation performance. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a three-dimensional structure diagram of the lighting mechanism provided by the embodiment of the present invention in the folded position;

[0017] Figure 2 A three-dimensional structure diagram of the lighting mechanism provided by the embodiment of the present invention in the deployed position;

[0018] Figure 3 An exploded structure diagram of the lighting mechanism provided by the embodiment of the present invention;

[0019] Figure 4 A top view of the lighting mechanism provided by the embodiment of the present invention in the deployed position;

[0020] Figure 5 A three-dimensional structure diagram of the first heat sink provided by the embodiment of the present invention;

[0021] Figure 6 A three-dimensional structure diagram of the second heat sink provided by the embodiment of the present invention;

[0022] Figure 7 is Figure 6 A partial enlarged view of A in

[0023] Figure 8 An exploded structure diagram of the lamp provided by the embodiment of the present invention;

[0024] Figure 9 An exploded structure diagram of the lamp head structure provided by the embodiment of the present invention.

[0025] Among them, each reference numeral in the figure:

[0026] 1 - Light source heat dissipation assembly; 11 - Heat sink; 11a - First heat sink; 11b - Second heat sink; 110 - Mounting surface; 111 - Mounting side; 112 - Placing portion; 113 - Limiting portion; 1131 - Protruding portion; 1132 - Groove portion; 1133 - Hanging hole; 1134 - Guide groove; 1135 - Hanging portion; 114 - Rotating shaft hole; 1141 - Guide flange; 115 - Angle limiting hole; 116 - Through hole; 1161 - Heat conducting flange; 117 - Air flow hole; 118 - Avoidance notch; 119 - Avoidance hole; 12 - Heat pipe; 13 - Metal backplane; 14 - Light source board; 15 - Light source cover; 2 - Rotating shaft; 21 - Limiting strip; 3 - First fixing member; 4 - Second fixing member; 5 - Lamp head structure; 51 - Light source driving member; 511 - Driving housing; 5110 - Anti-rotation groove; 512 - Driving board; 52 - Sleeve; 520 - Wire hole; 53 - Metal ring; 54 - Metal part; 55 - Lamp head pad; 56 - Connecting member. Detailed implementation manners

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0029] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0030] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0031] Please refer to Figures 1 to 3, the lighting mechanism provided by the embodiments of the present invention will be described below. In one embodiment of the lighting mechanism, the lighting mechanism includes at least two light source heat dissipation components 1 and a rotating shaft 2, and two adjacent light source heat dissipation components 1 are rotatably connected through the rotating shaft 2. The number of the light source heat dissipation components 1 can be two, three, four, etc., and the specific number is not limited here. Each adjacent two light source heat dissipation components 1 are rotatably connected through the rotating shaft 2. Each light source heat dissipation component 1 includes a plurality of heat dissipation fins 11 and a light source board 14 fixed on the heat dissipation fins 11. The plurality of heat dissipation fins 11 are arranged at intervals in a stacked manner. The heat dissipation fins 11 are parallel to each other and there is a spacing between adjacent heat dissipation fins 11, which is beneficial to heat dissipation. When the light source board 14 is working, the generated heat is quickly transferred to the heat dissipation fins 11 in contact with it, and then the heat is dissipated into the air through the heat dissipation fins 11. The heat dissipation fins 11 of the light source heat dissipation component 1 are arranged in a staggered manner in sequence along the stacking direction thereof, that is, in two adjacent light source heat dissipation components 1, the heat dissipation fins 11 of one light source heat dissipation component 1 are clamped between the two heat dissipation fins 11 of the other light source heat dissipation component 1. In this way, the length of the lighting mechanism in the stacking direction of the heat dissipation fins 11 can be reduced, and the overall volume of the lighting mechanism can be reduced. The rotating shaft 2 is arranged through each heat dissipation fin 11 along the stacking direction of the heat dissipation fins 11, so as to connect two adjacent light source heat dissipation components 1 in series. When each light source heat dissipation component 1 rotates, it has two limit positions, namely the unfolded position and the folded position. The rotating shaft 2 is arranged deviating from the center of the heat dissipation fin 11. In the folded position, the heat dissipation fins 11 of two adjacent light source heat dissipation components 1 overlap each other (it can be completely overlapped or mostly overlapped, and the overlapping area is not limited here), and the volume of the lighting mechanism is small; in the unfolded position, the heat dissipation fins 11 of two adjacent light source heat dissipation components 1 are staggered with each other (there is still a small overlapping area of the heat dissipation fins 11), and the light emitting surfaces of each light source heat dissipation component 1 face the object to be irradiated. It can be seen that during the processes of packaging, transportation and installation, the lighting mechanism is adjusted to the folded position. At this time, the volume of the lighting mechanism is small, which is beneficial to reducing the packaging and transportation costs; when the lighting mechanism is used normally, the lighting mechanism is adjusted to the unfolded position, the heat dissipation fins 11 of two adjacent light source heat dissipation components 1 are staggered with each other, the contact area between the heat dissipation fins 11 and the air is increased, which is more beneficial to heat dissipation, and the light source boards 14 of the two light source heat dissipation components 1 both face the object to be irradiated, and the irradiation range of the lighting mechanism is also increased.

[0032] The lighting mechanism in the above embodiments includes at least two light source heat dissipation components 1, and two adjacent light source heat dissipation components 1 are rotatably connected by a rotating shaft 2. Each light source heat dissipation component 1 includes a plurality of heat dissipation fins 11 arranged at intervals in a stacked manner and a light source board 14 fixed on the heat dissipation fins 11. The light emitted by the light source board 14 has a directionality and the light loss is small. When the respective light source heat dissipation components 1 are rotated relative to each other to the folded position, the heat dissipation fins 11 of two adjacent light source heat dissipation components 1 overlap each other, reducing the overall volume of the lighting mechanism and facilitating packaging and transportation. When the respective light source heat dissipation components 1 are rotated relative to each other to the unfolded position, the light-emitting surfaces of the respective light source heat dissipation components 1 all face the object to be irradiated, enabling the lighting mechanism to cover a larger lighting range, and the heat dissipation fins 11 of two adjacent light source heat dissipation components 1 are staggered from each other, increasing the heat dissipation area between the heat dissipation fins 11 and the air and effectively improving the heat dissipation performance.

[0033] Please refer to Figures 4 to 6 , in one embodiment of the lighting mechanism, a rotating shaft hole 114 and an angle limiting hole 115 are formed in the heat dissipation fin 11, and the rotating shaft hole 114 and the angle limiting hole 115 communicate with each other. The rotating shaft 2 is disposed through the rotating shaft holes 114 in each heat dissipation fin 11, and a limiting strip 21 protrudes radially from the surface of the rotating shaft 2 and extends into the angle limiting hole 115. When the limiting strip 21 abuts against the inner walls of the angle limiting holes 115 of two light source heat dissipation components 1 respectively, the lighting mechanism is in the unfolded position or the folded position.

[0034] Optionally, the cross-section of the limiting strip 21 is rectangular or trapezoidal, the angle limiting hole 115 is fan-shaped, and the angle by which the light source heat dissipation component 1 rotates relative to the rotating shaft 2 is the central angle θ corresponding to the angle limiting hole 115. When the structures and sizes of the angle limiting holes 115 of two light source heat dissipation components 1 are exactly the same, the angle by which two adjacent light source heat dissipation components 1 rotate relative to each other is twice the central angle θ of the angle limiting hole 115. The size of the central angle θ corresponding to the angle limiting hole 115 is not limited here. For example, when θ is 90°, the angle by which two adjacent light source heat dissipation components 1 rotate relative to each other is 180°; when θ is 45°, the angle by which two light source heat dissipation components 1 rotate relative to each other is 90°.

[0035] Please refer to Figure 1 and Figure 2, the number of the light source heat dissipation components 1 is two. The light-emitting surfaces of the light source plates 14 of the two light source heat dissipation components 1 are parallel to each other or arranged at an obtuse angle in the unfolded position, and the orientations of the light-emitting surfaces of the light source plates 14 of the two light source heat dissipation components 1 are opposite in the folded position. In this embodiment, when θ is 45°, the relative rotation angle of the two light source heat dissipation components 1 is 90°. When the light-emitting directions of the light source plates 14 of the two light source heat dissipation components 1 are the same in the unfolded position, the light-emitting directions of the light source plates 14 are the same or arranged at a relatively large acute angle. When the lighting mechanism is applied to a street lamp, the two light source plates 14 can both be arranged facing the ground, so as to cover a larger illumination area. Moreover, when the light source plates 14 both face the ground, the limiting strip 21 of the rotating shaft 2 abuts against the inner wall of the angle limiting strip 21, and the two light source heat dissipation components 1 are both in the limit position. Under the action of gravity, they will not continue to rotate relatively and can only rotate in the reverse folding direction.

[0036] Please refer to Figure 2 and Figure 3 , in one embodiment, a guiding flange 1141 is formed by the convexity of the heat sink 11 at the inner walls of the rotating shaft hole 114 and the angle limiting hole 115. The guiding flange 1141 extends along the axial direction of the rotating shaft 2 from the inner walls of the rotating shaft hole 114 and the angle limiting hole 115. The function of the guiding flange 1141 is to prevent the heat sink 11 from being too thin and shaking relative to the rotating shaft 2. The guiding flange 1141 can be in a closed shape or have an opening. In other embodiments, the guiding flange 1141 has an opening and only extends from the inner wall of the rotating shaft hole 114.

[0037] In another embodiment, the guiding flange 1141 is separately provided from the heat sink 11 and is fixed to the surface of the heat sink 11 in a gasket form, which can also prevent the heat sink 11 from shaking relative to the rotating shaft 2.

[0038] Please refer to Figure 3 and Figure 5 , in one embodiment of the light source heat dissipation component 1, the light source heat dissipation component 1 further includes a heat pipe 12 passing through the heat sink 11, and the heat sink 11 is correspondingly provided with a through hole 116 for the heat pipe 12 to pass through. The heat generated by the light source plate 14 is transferred to the heat sink 11 and then transferred from the heat sink 11 to the heat pipe 12. A liquid such as a coolant with strong heat absorption ability is arranged inside the heat pipe 12. When the temperature of the heat pipe 12 is too high, the liquid inside it is vaporized by heat, which can take away most of the heat and enhance the heat dissipation effect. A heat conducting flange 1161 is formed by the extension of the inner wall of the through hole 116 of the heat sink 11. The heat conducting flange 1161 extends along the axial direction of the heat pipe 12 from the inner wall of the through hole 116, so that the heat sink 11 and the heat pipe 12 are in surface contact, increasing the contact area and accelerating the heat conduction rate.

[0039] Please refer to Figure 5 and Figure 6, in one embodiment of the light source heat dissipation component 1, a mounting side 111 is provided on a flat surface of some of the heat sinks 11a. The heat sinks 11a with the mounting side 111 are arranged continuously along the axial direction of the rotating shaft 2. In this way, the mounting sides 111 are arranged to form a mounting surface 110 for placing the light source board 14. The light source board 14 is in contact with multiple heat sinks 11a, and the heat generated by it can be dispersed and transferred to each heat sink 11a. The length of the light source board 14 in the axial direction of the heat pipe 12 is less than the total length of the superposition of each heat sink 11. That is, some of the heat sinks 11a have the above-mentioned mounting side 111 for installing the light source board 14. Such heat sinks 11a are the first heat sinks 11a, and the remaining heat sinks 11b are the second heat sinks 11b. The difference between the first heat sink 11a and the second heat sink 11b is only whether they have the mounting side 111. When the light source board 14 generates heat during operation, the heat generated by the light source board 14 is directly transferred to the first heat sink 11a in contact with it. The first heat sink 11a that accumulates heat transfers the heat to the heat pipe 12. At the same time, the first heat sink 11a exchanges heat with the air through the gap between adjacent first heat sinks 11a. While absorbing heat, the heat pipe 12 transfers part of the heat to the second heat sink 11b, and the second heat sink 11b exchanges heat with the air to enhance the heat dissipation performance.

[0040] In another embodiment of the light source heat dissipation component 1, all the heat sinks 11 have the mounting side 111, that is, the structures of all the heat sinks 11 are the same.

[0041] In one embodiment of the heat sink 11, the shape of the heat sink is circular, square, polygonal, etc., which is not limited here. Please refer to Figure 5 and Figure 6 , when the heat sink 11 is circular, one side of the first heat sink 11a is cut to form the mounting side 111, so that the area of the first heat sink 11a is smaller than that of the second heat sink 11b, and the heat dissipation performance of the second heat sink 11b is correspondingly higher. When the heat sink is square or polygonal, one side of the heat sink can be used as the mounting side 111. In this way, the structures of the first heat sink 11a and the second heat sink 11b are exactly the same; or the heat sink can be cut to form the mounting side 111. In this way, the area of the first heat sink 11a is smaller than that of the second heat sink 11b.

[0042] Please refer to Figure 5, in one embodiment of the heat sink 11, a placement portion 112 is formed by extending from the installation side 111 of the first heat sink 11a. The placement portion 112 extends along the axial direction of the heat pipe 12 from the installation side 111. One sides of the respective placement portions 112 facing the light source board 14 are located on the same plane, that is, the installation surface 110. In this way, the light source board 14 has an installation surface 110 arranged in a plane. Firstly, it is more convenient for the installation of the light source board 14. Secondly, it increases the contact area between the light source board 14 and the first heat sink 11a, enabling the heat generated by the light source board 14 to be transferred to the first heat sink 11a more quickly.

[0043] Please refer to Figure 5 , in one embodiment of the heat sink 11, an avoidance cutout 118 and an avoidance hole 119 are formed on one side of the first heat sink 11a. Since the light source board 14 is arranged on the installation surface 110 and the heat pipe 12 is arranged along the axis direction of the rotating shaft 2, during the mutual rotation of the two light source heat dissipation components 1, both the light source board 14 and the heat pipe 12 will interfere with the first heat sink 11a. Therefore, the avoidance cutout 118 and the avoidance hole 119 are formed on the first heat sink 11a of both the two light source heat dissipation components 1.

[0044] Please refer to Figure 3 , in one embodiment of the light source heat dissipation component 1, a metal backplane 13 is fixed on the installation surface 110, and the light source board 14 is fixed to the metal backplane 13, that is, the light source board 14 is fixed to the installation surface 110 through the metal backplane 13. The surface of the metal backplane 13 is smooth, has a closer contact with the placement portion 112 and the light source board 14, and has stronger heat conduction performance. Moreover, the setting of the metal backplane 13 is also more convenient for the installation of the light source board 14. For example, the metal backplane 13 is welded to the placement portion 112 of the installation surface 110, and the light source board 14 is fixed to the metal backplane 13 through fixing parts such as screws. The metal backplane 13 is made of aluminum, iron, copper or alloy, so that it has better heat conduction performance. Optionally, a light source cover 15 is further covered on the light source board 14. The light source cover 15 can uniform the light and protect the light source board 14. The light source cover 15 can be fixed to the metal backplane 13 by gluing, so as to arrange the light source board 14 in the light source cover 15.

[0045] Please refer to Figure 5 and Figure 6 , in one embodiment of the heat sink 11, air flow holes 117 are further formed on the heat sink 11. The air flow holes 117 are communicated with the through holes 116, so that a gap is formed between the side of the heat pipe 12 close to the air flow holes 117 and the inner wall of the heat sink 11. The heat pipe 12 has a heat conduction flange 1161, and the structure is relatively dense and heat is easily concentrated. Since a plurality of heat sinks 11 are stacked, the respective air flow holes 117 are aligned to form an air flow channel, enabling the heat around the heat pipe 12 to be quickly dissipated into the air and avoiding heat concentration.

[0046] Please refer to Figure 7 In one embodiment of the heat sink 11, the heat sink 11 extends in its stacking direction to form a limiting portion 113, and the limiting portion 113 is used to limit the distance between adjacent heat sinks 11. When the heat sinks 11 are stacked in a direction perpendicular to their surfaces, the limiting portion 113 of one heat sink 11 abuts against the limiting portion 113 of the adjacent heat sink 11, so that the limiting portion 113 becomes the supporting structure of the adjacent two heat sinks 11, preventing the adjacent two heat sinks 11 from being attached together. Moreover, the structures of the heat sinks 11 are the same, and the structures of the limiting portions 113 are also the same, so that the distance between every two adjacent heat sinks 11 is the same.

[0047] Furthermore, the limiting portion 113 is respectively provided with a convex portion 1131 and a concave portion 1132 on the opposite sides in the stacking direction of the heat sink 11. When the heat sinks 11 are stacked, the convex portion 1131 and the concave portion 1132 of the adjacent limiting portions 113 are inserted into each other, which has a positioning effect on the adjacent two heat sinks 11 and prevents the heat sinks 11 from rotating relative to each other.

[0048] Please refer to Figure 7 In one embodiment of the heat sink 11, the limiting portion 113 extends vertically from the edge of the heat sink 11, that is, the limiting portion 113 is arranged at the edge of the heat sink 11. Optionally, the number of the limiting portions 113 is one, and fixing and positioning structures such as a fixed shaft, a support sheet, a heat pipe 12, etc. are used to support the heat sinks 11 to maintain the force balance of the heat sinks 11. Or, the number of the limiting portions 113 is two or more, and they are circumferentially and uniformly arranged at the edge of the heat sink 11 to make the heat sinks 11 have a balanced force after installation. In another embodiment of the heat sink 11, the height of at least one of the guiding flange 1141 and the heat-conducting flange 1161 is the same as the distance between two adjacent heat sinks 11, and it is used as the limiting portion 113 for limiting the distance between two adjacent heat sinks 11.

[0049] Please refer to Figure 7, in one embodiment of the limiting portion 113, a hanging portion 1135 is further formed by radially extending the edge of the heat sink 11. A hanging hole 1133 for the hanging portion 1135 to extend into is formed in the protruding portion 1131. Correspondingly, the hanging portion 1135 is disposed in the groove portion 1132. In this embodiment, the hanging portion 1135 is radially inserted into the hanging hole 1133, so that two adjacent heat sinks 11 cannot move in the axial direction of the rotating shaft 2. Therefore, the cooperation between the hanging portion 1135 and the hanging hole 1133 can prevent two adjacent heat sinks 11 from moving relative to each other in the axial direction, further strengthening the positioning function of the limiting portion 113. More specifically, in a single heat sink 11, the groove portion 1132 of the limiting portion 113 is disposed close to the surface of the heat sink 11, and the protruding portion 1131 of the limiting portion 113 is disposed away from the surface of the heat sink 11, so that the hanging portion 1135 at the edge of the heat sink 11 can pass through the hanging hole 1133 of the protruding portion 1131 of the adjacent limiting portion 113, thereby enabling the adjacent limiting portions 113 to be radially inserted and connected.

[0050] Please refer to Figure 7 , in one embodiment of the limiting portion 113, a guiding groove 1134 communicating with the hanging hole 1133 is formed in the limiting portion 113. Before the hanging portion 1135 is inserted into the hanging hole 1133, the hanging portion 1135 is first inserted into the guiding groove 1134. Through the guiding of the guiding groove 1134, the hanging portion 1135 gradually enters the hanging hole 1133. More specifically, the width of the guiding groove 1134 gradually increases in the direction away from the hanging hole 1133. In this way, after the hanging portion 1135 is inserted into the guiding groove 1134 and moves in the direction of the hanging hole 1133, the hanging portion 1135 is restricted in the guiding groove 1134. As the width of the guiding groove 1134 gradually decreases, the hanging portion 1135 is also gradually restricted into the hanging hole 1133. The guiding groove 1134 can be selected as a guiding shape such as an inverted V shape.

[0051] Please refer to Figure 8 , the present invention further provides a lamp, which includes the lighting mechanism in any of the above embodiments, and further includes a lamp head structure 5 fixedly connected to the rotating shaft 2. When using this lamp, the lamp is installed on a lamp mounting base, and the rotating shaft 2 is also relatively fixed. Both light source heat dissipation components 1 rotate relative to the rotating shaft 2.

[0052] Please refer to Figure 8In one embodiment of the lamp holder structure 5, the lamp holder structure 5 includes a light source driver 51, a sleeve 52, a metal part 54 and a metal ring 53. The light source driver 51 is used to drive the light source board 14 to make the light source board 14 emit light. The sleeve 52 and the metal part 54 can rotate relative to each other with the axis of the sleeve 52 as the rotating axis. The metal part 54 has a cylindrical inner cavity, and the metal ring 53 is arranged in the metal part 54, that is, it is arranged in the cylindrical inner cavity. The metal ring 53 itself has elasticity and is installed in the metal part 54 under a certain pre-stressed state, so that the metal ring 53 is always in contact with the inner wall of the metal part 54 under the action of its own elastic force, that is, the metal ring 53 is always conductive with the metal part 54. One end of the metal ring 53 passes through the wire hole 520 of the sleeve 52 and is electrically connected to the light source driver 51, so that the light source driver 51, the metal ring 53 and the metal part 54 are conductive. Among them, the end of the metal ring 53 is set to deviate from the axis of the sleeve 52, so that it rotates with the rotation of the sleeve 52. When the metal part 54 is installed on the lamp mounting seat, the light source driver 51 is connected to the power supply of the lamp mounting seat through the metal ring 53 and the metal part 54. If the illumination direction of the lighting mechanism needs to be adjusted, the sleeve 52 and the light source driver 51 are rotated relative to the metal part 54 to adjust the orientation of the light source board 14 in the lighting mechanism. When the sleeve 52 rotates, the metal part 54 and the lamp mounting seat remain stationary, and the end of the metal ring 53 is set through the wire hole 520. The sleeve 52 drives the metal ring 53 to rotate inside the cylindrical inner cavity. During the rotation, the metal ring 53 is always in close contact with the inner wall of the metal part 54, keeping the light source driver 51 connected to the power supply of the lamp mounting seat.

[0053] See also Figure 8 In one embodiment of the lamp holder structure 5, the metal part 54 is barrel-shaped, that is, the metal part 54 has a bottom and a circumferential portion, and the bottom and the circumferential portion form a barrel-shaped metal part 54 with an opening. The inner cavity of the barrel-shaped metal part 54 is a cylindrical inner cavity. The metal ring 53 abuts against the inner wall of the circumferential portion, and the sleeve 52 enters the interior of the metal part 54 through the opening. The end of the sleeve 52 can be in contact with the bottom of the metal part 54 or have a certain gap therebetween, and the circumferential portion is wrapped around the outer circumference of the sleeve 52. The end of the sleeve 52 extends into the metal part 54, so that the sleeve 52 and the metal part 54 are in contact, which facilitates the sleeve 52 and the metal part 54 to form a rotating connection structure. Optionally, the outer circumference of the metal part 54 is provided with an external thread, which is threadedly connected to the lamp mounting base, and the electrical connection between the metal part 54 and the lamp mounting base is achieved through the contact between the metal part 54 and the lamp mounting base.

[0054] See also Figure 9, in one embodiment of the lamp cap structure 5, the lamp cap structure 5 further includes a connecting member 56 for connecting the metal member 54 and the sleeve 52. The connecting member 56 connects the metal member 54 and the sleeve 52 to each other and enables the metal member 54 and the sleeve 52 to rotate relative to each other. The lamp cap structure 5 further includes a lamp cap gasket 55, which covers the surface of the metal member 54. The connecting member 56 is sequentially disposed through the gasket, the metal member 54, and the sleeve 52. Since the sleeve 52 needs to be rotated when adjusting the light emitting angle of the lighting mechanism, the connecting member 56 also rotates with the sleeve 52, and the connecting member 56 will rub against the surface of the metal member 54. The setting of the lamp cap gasket 55 makes the surface of the metal member 54 contact with the surface of the lamp cap gasket 55. When the sleeve 52 rotates, the lamp cap gasket 55 will not rotate with the sleeve 52 or rotate slightly with the sleeve 52. Then, the surface of the metal member 54 will not be rubbed by the lamp cap gasket 55, and the friction between the surface of the metal member 54 and the head of the connecting member 56 is transferred to the friction between the lamp cap gasket 55 and the head of the connecting member 56, avoiding wear of the metal member 54.

[0055] Please refer to Figure 9 , in one embodiment of the lamp cap structure 5, the light source driver 51 includes a driver housing 511 and a driver board 512. The driver board 512 is disposed inside the driver housing 511, and the driver housing 511 is fixedly connected to the sleeve 52. Optionally, the driver housing 511 and the sleeve 52 are fixedly connected by a threaded member. The driver board 512 is directly fixed inside the driver housing 511 by a threaded member or clamped between the driver housing 511 and the sleeve 52. One end of the metal ring 53 passing through the wire hole 520 is welded to the driver board 512, so that this end of the metal ring 53 is not only fixedly connected to the driver board 512 but also electrically connected to the driver board 512, such that when the sleeve 52 and the light source driver 51 rotate, the metal ring 53 also rotates together.

[0056] Please refer to Figure 8 , in one embodiment of the lamp, the rotating shaft 2 axially limits the two light source heat dissipation components 1 on the rotating shaft 2 through the first fixing member 3, and fixedly connects the lamp cap structure 5 and the lighting mechanism through the second fixing member 4. Threaded holes are provided at both ends of the rotating shaft 2. The first fixing member 3 is threadedly connected to the threaded hole at the end away from the lamp cap structure 5 to prevent the heat dissipation fins 11 from falling off from this end. The second fixing member 4 passes through the driver housing 511 of the lamp cap structure 5 and is threadedly connected to the rotating shaft 2 to fix the lamp cap structure 5 on the rotating shaft 2. In addition, one end of the rotating shaft 2 connected to the lamp cap structure 5 is polygonal, such as triangular, quadrilateral, pentagonal, hexagonal, etc. The driver housing 511 of the lamp cap structure 5 is correspondingly provided with an anti-rotation groove 5110, and the shape of the anti-rotation groove 5110 is the same as the shape of the above-mentioned end of the rotating shaft 2. In this way, after the rotating shaft 2 is inserted into the anti-rotation groove 5110 of the driver housing 511, the rotating shaft 2 will not rotate relative to the lamp cap structure 5.

[0057] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. Lighting mechanism, characterized in that: It includes at least two light source heat dissipation components. Two adjacent light source heat dissipation components are rotatably connected through a rotating shaft. The light source heat dissipation component includes a plurality of heat dissipation fins arranged in a stacked and spaced manner, and a light source board fixed on the heat dissipation fins. The heat dissipation fins of the light source heat dissipation component are arranged in a staggered manner in sequence along the stacking direction thereof. The rotating shaft is arranged through each heat dissipation fin along the stacking direction of the heat dissipation fins, so that the lighting mechanism has an unfolded position where the heat dissipation fins of each light source heat dissipation component are staggered from each other and a folded position where the heat dissipation fins of each light source heat dissipation component overlap each other. The light emitting surfaces of each light source heat dissipation component face the object to be irradiated at the unfolded position; the heat dissipation fin has an installation side arranged as a flat straight surface. The installation sides in the same light source heat dissipation component are arranged to form an installation surface for installing the light source board. A placement portion is formed by extending from the installation side along the stacking direction. One side of each placement portion facing the light source board is located on the installation surface. The heat dissipation fin is provided with a rotating shaft hole for the rotating shaft to pass through and an angle limiting hole communicated with the rotating shaft hole. A limiting strip protruding radially from the surface of the rotating shaft extends into the angle limiting hole; a guiding flange for preventing the heat dissipation fin from shaking is formed by protruding at the inner walls of the rotating shaft hole and the angle limiting hole of the heat dissipation fin; the heat dissipation fin extends in its stacking direction to form a limiting portion for defining the distance between two adjacent heat dissipation fins. A protruding portion and a groove portion are respectively arranged on the opposite sides of the limiting portion in the stacking direction of the heat dissipation fins. The adjacent protruding portion and the groove portion are inserted into each other to prevent relative rotation between two adjacent heat dissipation fins.

2. The lighting mechanism according to claim 1, characterized in that: The number of the light source heat dissipation components is two. The light emitting surfaces of the light source boards of the two light source heat dissipation components are parallel to each other or arranged at an obtuse angle at the unfolded position, and the orientations of the light emitting surfaces of the light source boards of the two light source heat dissipation components are opposite at the folded position.

3. The lighting mechanism according to claim 1, characterized in that: The light source heat dissipation component further includes heat pipes penetrating through each heat dissipation fin. The heat dissipation fin is correspondingly provided with through holes for the heat pipes to pass through. A heat conducting flange wrapping around the outer periphery of the heat pipe is formed by extending at the inner wall of the through hole of the heat dissipation fin.

4. The lighting mechanism according to claim 3, characterized in that: The heat dissipation fin of one of the light source heat dissipation components has an avoidance cutout for avoiding the light source board of the other light source heat dissipation component and an avoidance hole for avoiding the heat pipe of the other light source heat dissipation component.

5. The lighting mechanism according to claim 1, characterized in that: The limiting portion extends vertically from the edge of the heat dissipation fin. A hanging portion is also radially extended from the edge of the heat dissipation fin. A hanging hole for the hanging portion to extend into is formed on the protruding portion.

6. Lighting fixture, characterized in that: It includes the lighting mechanism according to any one of claims 1-5, and further includes a lamp head structure fixedly connected to the rotating shaft.

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