Lighting equipment

Abstract

To provide an illuminating device that need not to fix a circuit substrate by using a screw, has a simple structure of the illuminating device, can be easily mounted, and has high space utilization rate.SOLUTION: An illuminating device includes a cylindrical base cover 10, a radiator 30 stored in an internal cavity of the base cover 10, a circuit substrate 40, an inner lid 50, and a light source plate 60. The radiator 30 is fixed to the base cover 10 at least in a circumferential direction of the base cover 10, and the radiator 30, the circuit substrate 40, the inner lid 50, and the light source plate 60 sequentially abuts each other in an axial direction of the base cover 10. An inner peripheral wall of the base cover 10 is partially depressed outward in a diametrical direction or is projected inward in the diametrical direction to form a base cover first fitting portion. An outer peripheral area of the light source plate 60 is partially fitted with the base cover first fitting portion, and the light source plate 60 is positioned in the axial direction by the base cover first fitting portion.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to the field of lighting technology, and more particularly to a lighting device that has a simple structure, high space utilization rate, and is easy to assemble. [Background technology]

[0002] For example, a small-volume bulb-type lighting device, such as a GX53 lamp, includes an outer cover and a number of components located inside the cover, such as a light source plate, a circuit board, an inner cover, and a heat sink. The above components usually need to be connected to each other by screws or bolts. For example, a screw needs to pass through the light source plate, the inner cover, the circuit board, and the heat sink in order to align and fix these components.

[0003] Not only does the screw fastening make the assembly of the lighting device complicated, but the screw holes take up the surface area of ​​the circuit board, and in order to take insulation into account, it is necessary to leave space around the screw holes, making it impossible to arrange the circuit. In particular, for example, for a GX53 lamp, the overall size is relatively constant in the relevant standards, and the circuit arrangement of the circuit board of the conventional GX53 lamp has already reached its limit, which restricts the development of its functions, and it is difficult to add, for example, a wireless module or a stepless dimming function module to the circuit. Summary of the Invention [Problem to be solved by the invention]

[0004] SUMMARY OF THE PRESENT EMBODIMENT The present invention aims to provide an illumination device which overcomes or at least mitigates the above-mentioned disadvantages present in the prior art. [Means for solving the problem]

[0005] The lighting device provided by the present invention includes a cylindrical base cover, a heat sink housed in the internal cavity of the base cover, a circuit board, an inner cover and a light source plate, wherein the heat sink is fixed to the base cover at least in the circumferential direction of the base cover, the heat sink, the circuit board, the inner cover and the light source plate abut in sequence in the axial direction of the base cover, the inner wall of the base cover is partially recessed radially outward or protrudes radially inward to form a base cover first fitting portion, the outer peripheral region of the light source plate is partially fitted into the base cover first fitting portion, and the light source plate is positioned in the axial direction by the base cover first fitting portion.

[0006] In at least one embodiment, there are a plurality of the base cover first fitting portions, and the plurality of the base cover first fitting portions are distributed at intervals in the circumferential direction of the base cover.

[0007] In at least one embodiment, the inner wall of the base cover further protrudes partially radially inward to form multiple base cover fastening portions distributed circumferentially around the base cover, and in the axial direction, the heat sink and the base cover fastening portions are respectively located on either side of the circuit board, and in the radial direction of the base cover, the base cover fastening portions extend partially to the area where the circuit board is present, pressing the circuit board against the heat sink and positioning the circuit board in the axial direction.

[0008] In at least one embodiment, the outer wall of the heat sink is partially recessed radially inward to form a plurality of heat sink positioning grooves, and the heat sink positioning grooves do not interfere with the positions of the heat sink and the base cover fastening portion during the mounting process.

[0009] In at least one embodiment, an elastic material is provided between the light source plate and the inner lid, and / or an elastic material is provided between the inner lid and the circuit board.

[0010] In at least one embodiment, peripheral regions of opposing end faces of the heat sink and the circuit board may mate with one another at a unique relative circumferential position of the heat sink and the circuit board.

[0011] In at least one embodiment, the inner wall of the base cover partially recesses radially outward or protrudes radially inward to form a base cover second fitting portion, the outer wall of the inner lid partially protrudes radially outward or protrudes radially inward to fit with the base cover second fitting portion so that the inner lid and the base cover do not rotate relative to each other in the circumferential direction, and the outer wall of the light source plate partially protrudes radially outward or protrudes radially inward to fit with the base cover second fitting portion so that the light source plate and the base cover do not rotate relative to each other in the circumferential direction.

[0012] In at least one embodiment, the inner wall of the base cover partially protrudes radially inward or partially recessed radially outward to form a base cover third fitting portion, and the outer wall of the heat sink partially recesses radially inward or partially protrudes radially outward to fit into the base cover third fitting portion, preventing the heat sink and the base cover from rotating relative to each other in the circumferential direction.

[0013] In at least one embodiment, the lighting device further includes one or more connect pins, the connect pins extending from an exterior of the base cover into an internal cavity of the base cover, the circuit board having holes through which the connect pins pass, the connect pins extending partially into the internal cavity of the inner lid, and the connect pins do not contact the inner lid.

[0014] In at least one embodiment, the lighting device further includes a top cover, the top cover and the base cover being engaged with each other. Effect of the Invention

[0015] According to the lighting device of the present invention, there is no need to use screws to fasten the circuit board, so the lighting device has a simple structure, is easy to mount, and has a high space utilization rate. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is an exploded view of main components of an illumination device according to an embodiment of the present invention. [Diagram 2] 2 and 3 are schematic diagrams of an illumination device according to an embodiment of the present invention, exploded along the axial direction. [Diagram 3] FIG. 3 is a schematic diagram of an illumination device according to an embodiment of the present invention, exploded along an axial direction. [Figure 4] FIG. 4 is a schematic diagram of the lighting device according to the embodiment of the present invention, exploded along the axial direction at another radial angle. [Diagram 5] FIG. 5 is a schematic diagram of a base cover of the lighting device according to one embodiment of the present invention. [Figure 6] FIG. 6 is a schematic diagram of a heat sink of a lighting device according to one embodiment of the present invention. [Figure 7] FIG. 7 is a schematic diagram showing a circuit board of a lighting device according to an embodiment of the present invention in two different directions. [Figure 8] FIG. 8 is a schematic diagram showing a circuit board of a lighting device according to an embodiment of the present invention in two different directions. [Figure 9] FIG. 9 is a schematic diagram of an inner cover of a lighting device according to one embodiment of the present invention. [Figure 10] FIG. 10 is a schematic diagram of a light source plate of an illumination device according to one embodiment of the present invention. [Figure 11] FIG. 11 is a schematic diagram of a top cover of a lighting device according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings. Note that the detailed description is merely for the purpose of showing how a person skilled in the art can implement the present invention, and is not intended to cover all possible implementations of the present invention, nor to limit the scope of the present invention.

[0018] Unless otherwise specified, with reference to FIG. 3, A indicates the axial direction of the lighting device, the axial direction A coincides with the axial direction of the base cover 10 in the lighting device, R indicates the radial direction of the lighting device, the radial direction R coincides with the radial direction of the base cover 10 in the lighting device, and the circumferential direction of the lighting device coincides with the circumferential direction of the base cover 10.

[0019] FIG. 1 shows the main components of the lighting device of the present invention, which includes a cylindrical cover, a heat sink 30 housed in the internal cavity of the cover, a circuit board 40, an inner lid 50 and a light source plate 60, and the cover includes a base cover 10 and a top cover 20, and the top cover 20 can be opened in an axial direction A relative to the base cover 10.

[0020] 2 and 3, base cover 10 is a stepped cylinder that includes a small cylinder portion (a lower portion of base cover 10 in FIG. 3 having a smaller inner diameter) and a large cylinder portion (an upper portion of base cover 10 in FIG. 3 having a larger inner diameter), and the above-mentioned heat sink 30, circuit board 40, inner cover 50 and light source plate 60 are housed in the large cylinder portion, and the small cylinder portion is for housing other components or for housing part of the structure of the circuit board when the circuit board has a different shape.

[0021] Along the axial direction A, in the direction from the base cover 10 toward the top cover 20, the heat sink 30, the circuit board 40, the inner cover 50 and the light source plate 60 are in contact with each other in this order.

[0022] The heat sink 30 is fixed to the base cover 10. Specifically, it is preferable that the heat sink 30 abuts on the bottom of the large cylinder portion at the boundary between the large cylinder portion and the small cylinder portion, and the heat sink 30 is fixed to the base cover 10 by screws 80. The heat sink 30 is annular, and the inner diameter of the heat sink 30 is equal to or larger than the inner diameter of the small cylinder portion, so that the heat sink 30 does not block the passage from the circuit board 40 to the small cylinder portion.

[0023] Since all of the components of the cover described in this specification are mainly housed within the large cylindrical portion, the base cover 10 described below refers to the large cylindrical portion of the base cover 10, and the boundary between the large cylindrical portion and the small cylindrical portion is simply referred to as the bottom of the base cover 10.

[0024] 5 and 6, it is preferable that the inner wall of the base cover 10 partially protrudes radially inward at the bottom to form a base cover protrusion 14 (also called a base cover third fitting portion), and the peripheral wall of the heat sink 30 is recessed inward at a lower portion in the axial direction A to form a heat sink positioning groove 33. The outer diameter of the heat sink 30 and the inner diameter of the base cover 10 are approximately equal, and when the heat sink 30 is attached to the base cover 10, the base cover protrusion 14 is inserted into the heat sink positioning groove 33 to specify the relative positions of the heat sink 30 and the base cover 10 in the circumferential direction, and the heat sink 30 does not move (does not rotate) in the circumferential direction with respect to the base cover 10.

[0025] The base cover 10 and the heat sink 30 can be uniquely positioned in the circumferential direction by other fitting methods. For example, the base cover third fitting portion may be formed by recessing the inner circumferential wall of the base cover 10 radially outward, and in this case, a fitting portion protruding radially outward and fitting with the base cover third fitting portion is formed on the outer circumferential wall of the heat sink 30 correspondingly. When the base cover third fitting portion is a portion where the inner periphery of the base cover 10 is recessed radially outward, the upper part of the recessed portion is opened so that the protruding fitting portion located on the outer circumferential wall of the heat sink 30 is embedded in the base cover third fitting portion.

[0026] 2 and 3, the circuit board 40 abuts against the heat sink 30. The peripheral wall of the base cover 10 partially protrudes radially outward to form base cover fastening portions 13, and in this embodiment, there are three base cover fastening portions 13, which are uniformly distributed in the circumferential direction of the base cover 10. The base cover fastening portions 13 partially overlap the circuit board 40 in the radial direction R, and the distance between the base cover fastening portions 13 and the bottom of the base cover 10 in the axial direction A is approximately equal to the sum of the thickness of the circuit board 40 and the thickness of the heat sink 30, and the heat sink 30 and the base cover fastening portions 13 position the circuit board 40 on both axial sides of the circuit board 40.

[0027] The base cover fastening portion 13 has a shape larger at one end and smaller at the other end in the axial direction A, or the radial size of the base cover fastening portion 13 increases toward the bottom of the base cover 10, and for example, it is preferable that the base cover fastening portion 13 has a triangular shape on a cross section passing through the axial direction A. This allows the circuit board 40 to be easily attached beyond the base cover fastening portion 13 in the axial direction A. Note that the specific shape of the base cover fastening portion 13 is not limited in the present invention.

[0028] 6, it is preferable that the outer peripheral wall of the heat sink 30 is partially recessed radially inward to form a heat sink positioning groove 31 that penetrates the heat sink 30 in the axial direction A. The heat sink positioning groove 31 corresponds to the base cover fastening portion 13 in the circumferential direction, and the depth of the heat sink positioning groove 31 in the radial direction R is greater than the height of the base cover fastening portion 13 in the radial direction R, so that the base cover fastening portion 13 does not interfere with the heat sink 30 in the process of fitting the heat sink 30 to the base cover 10.

[0029] 6 and 7, it is preferable that the peripheral region of the end face of the heat sink 30 facing the circuit board 40 partially protrudes onto the circuit board 40 to form the heat sink first protrusions 32a and the heat sink second protrusions 32b. The heat sink first protrusions 32a and the heat sink second protrusions 32b have different shapes, and for example, it is preferable that the heat sink first protrusions 32a are substantially triangular and the heat sink second protrusions 32b are substantially semicircular in a cross section perpendicular to the axial direction A. It is preferable that the interval between the heat sink first protrusions 32a and the heat sink second protrusions 32b in the circumferential direction of the heat sink 30 is 180°. Correspondingly, the outer peripheral region of the circuit board 40 is partially recessed radially inward to form a circuit board first positioning opening 41a and a circuit board second positioning opening 41b, and the shapes of the circuit board first positioning opening 41a and the heat sink first protrusion 32a match, and the shapes of the circuit board second positioning opening 41b and the heat sink second protrusion 32b match.As a result, when the circuit board 40 is attached, by aligning the circuit board first positioning opening 41a with the heat sink first protrusion 32a and aligning the circuit board second positioning opening 41b with the heat sink second protrusion 32b, a reference positioning is provided in the circumferential direction, and the circuit board 40 and the heat sink 30 do not move (rotate) relative to each other in the circumferential direction.

[0030] It should be noted that the heat sink 30 and the circuit board 40 can also be uniquely positioned in the circumferential direction by other fitting methods. For example, a radially inward recess is formed on the heat sink 30, and a radially outward protrusion is formed on the circuit board 40, and the recess and protrusion are fitted together.

[0031] 4 and 7, a connect pin (PIN) 70 is further fixed on the base cover 10, and the connect pin 70 preferably extends from the outside of the base cover 10 to the internal cavity of the base cover 10 along the axial direction A. For example, the base cover 10 is made of a plastic material, and the connect pin is integrally formed with the base cover 10 during the injection molding process of the base cover 10.

[0032] For example, there are two connect pins 70, and the two connect pins 70 are spaced apart from each other by 180° in the circumferential direction. The circuit board 40 has holes 42 through which the connect pins 70 pass. After the connect pins 70 pass through the holes 42, it is preferable to solder the connect pins 70 to the circuit board 40. The connect pins 70 not only supply power to the circuit board 40, but also assist in positioning the circuit board 40.

[0033] 6 and 8, the heat dissipating silica gel 90 is attached to the surface of the circuit board 40 facing the heat sink 30, and preferably, for example, the heat dissipating silica gel 90 is formed in an arch shape and uniformly distributed around the periphery of the circuit board 40. Correspondingly, the surface of the heat sink 30 facing the circuit board 40 is partially recessed in a direction away from the circuit board 40 to form a heat dissipating silica gel groove 34. The heat dissipating silica gel 90 is accommodated in the heat dissipating silica gel groove 34 and bonded to the heat sink 30, thereby increasing the heat dissipation area and improving the heat dissipation efficiency.

[0034] Returning to FIG. 2 and FIG. 3, the inner lid 50 abuts against the circuit board 40, and the light source plate 60 abuts against the inner lid 50, thereby isolating the light source plate 60 from the circuit board 40 using the inner lid 50. The circuit board 40 is used to control the light emission of the light source plate 60, and the inner lid 50 not only prevents the circuit board 40 and the light source plate 60 from contacting each other and causing a short circuit, but also plays a role in dissipating heat to the light source plate 60. The inner lid 50 is preferably made of a material with excellent thermal conductivity, such as aluminum. In order to ensure insulation, for example, an insulating material is provided between the metal inner lid 50 and the circuit board 40 and the light source plate 60, and the insulating material may be attached to the inner lid 50 or to the circuit board 40 and the light source plate 60.

[0035] The inner lid 50 may be cylindrical with one axial end open and the other axial end sealed. The contact between the bottom of the inner lid 50 and the light source plate 60 increases the heat transfer area. The axial opening of the inner lid 50 faces the circuit board 40, so that the extended end of the connect pin 70 is housed in the internal cavity of the inner lid 50. The connect pin 70 and the inner lid 50 are not in contact with each other.

[0036] The inner peripheral wall of the base cover 10 is partially recessed radially outward to form the base cover first fitting portion 11, and there are three base cover first fitting portions 11, and it is preferable that the three base cover first fitting portions 11 are uniformly distributed in the circumferential direction. Also, referring to Fig. 10, the outer peripheral region of the light source plate 60 partially protrudes radially outward to form three light source plate axial positioning protrusions 61 corresponding to the base cover first fitting portions 11. When the light source plate 60 is attached, the light source plate axial positioning protrusions 61 are elastically deformably engaged in the base cover first fitting portion 11, and after attachment, the base cover first fitting portion 11 positions the light source plate 60 and the inner lid 50 in the axial direction.

[0037] The base cover first fitting portion 11 may be a partial protrusion of the inner peripheral wall of the base cover 10, and for example, a recess may be formed on the inner peripheral side of the protrusion structure further toward the outside in the radial direction, and the outer peripheral region of the light source plate 60 may partially extend into the recessed portion of the protrusion structure, so that the outer peripheral region of the light source plate 60 may partially fit with the base cover first fitting portion 11 to position the light source plate 60 in the axial direction. Depending on the different sizes of the first fitting portion 11 in the radial direction R, the region of the light source plate 60 that fits with the first fitting portion 11 may be a recessed portion of the outer peripheral region of the light source plate 60, or may be a protruding portion of the outer peripheral region of the light source plate 60, or may not protrude or be recessed.

[0038] Considering manufacturing tolerances, it is preferable that the distance in the axial direction A between the upper end surface of the base cover first fitting portion 11 close to the top cover 20 and the upper end surface of the heat sink 30 that contacts the circuit board 40 is substantially larger than the sum of the thicknesses of the inner lid 50, the light source plate 60 (not including the light emitting member protruding in the axial direction), and the circuit board 40 (not including the electronic device protruding in the axial direction). It is preferable that an elastic material layer is provided between the light source plate 60 and the inner lid 50, and between the inner lid 50 and the circuit board 40, and the total thickness difference of the elastic material layer is made slightly larger than the distance difference, thereby compensating for the tolerances and effectively positioning the light source plate 60, the inner lid 50, and the circuit board 40 in the axial direction by the base cover first fitting portion 11.

[0039] In addition, in the above-mentioned positioning, the base cover fastening portion 13 plays an auxiliary role. For example, when the sum of the thicknesses of the circuit board 40 and the heat sink 30 in an uncompressed state is greater than the distance from the surface of the base cover fastening portion 13 facing the bottom of the base cover 10 (hereinafter referred to as the lower surface of the base cover fastening portion 13) to the bottom of the base cover 10, the base cover fastening portion 13 compresses the circuit board 40 and the heat sink 30 in the axial direction A, causing slight axial deformation in the circuit board 40 and / or the heat sink 30 so that they do not exceed the lower surface of the base cover fastening portion 13.

[0040] In the axial direction A, it is preferable that the sum of the thicknesses of the circuit board 40 and the heat sink 30 is slightly larger than the distance from the lower surface of the base cover fastening portion 13 to the bottom of the base cover 10. Also, in the axial direction A, it is preferable that the distance from the upper end surface of the base cover first fitting portion 11 closer to the top cover 20 to the lower surface of the base cover fastening portion 13 is slightly larger than the sum of the thicknesses of the inner lid 50 and the light source plate 60. This ensures that the light source plate 60, the inner lid 50 and the circuit board 40 can be accurately positioned in the axial direction by the base cover first fitting portion 11 and the base cover fastening portion 13.

[0041] The elastic material layer between the light source plate 60 and the inner lid 50 is preferably formed in a circular piece shape, and the elastic material layer between the inner lid 50 and the circuit board 40 is preferably formed in an O-ring shape. The elastic material between the inner lid 50 and the circuit board 40 is preferably an insulating material, for example, silica gel. In order to facilitate heat dissipation from the light source plate 60 to the inner lid 50, the elastic material between the light source plate 60 and the inner lid 50 is preferably a heat-conductive silica gel.

[0042] 9, it is preferable that an outer peripheral region of one end of the inner lid 50 that contacts the circuit board 40 is partially recessed radially inward to form an inner lid positioning groove 51 that corresponds to the base cover fastening portion 13 in the circumferential direction. The depth of the inner lid positioning groove 51 in the radial direction R is greater than the height of the base cover fastening portion 13 in the radial direction R, and the length of the inner lid positioning groove 51 in the axial direction A is equal to or slightly greater than the length of the base cover fastening portion 13 in the axial direction A, so that the base cover fastening portion 13 is accommodated in the inner lid positioning groove 51 and does not interfere with the inner lid 50.

[0043] 5, 9 and 10, it is preferable that the inner peripheral wall of the upper part of the base cover 10 near the top cover 20 in the axial direction A is partially recessed radially outward to form a base cover positioning groove 15 (also called the base cover second fitting part), and the base cover positioning groove 15 opens to the upper part of the base cover 10. The outer peripheral wall of the inner lid 50 partially protrudes radially outward to form an inner lid positioning protrusion 52, and the outer peripheral region of the light source plate 60 partially protrudes radially outward to form a light source plate circumferential positioning protrusion 62. In the circumferential direction, the width of the base cover positioning groove 15 is equal to or slightly larger than the widths of the inner lid positioning protrusion 52 and the light source plate circumferential positioning protrusion 62. The inner lid positioning protrusion 52 and the light source plate circumferential positioning protrusion 62 extend into the base cover positioning groove 15, thereby realizing the circumferential positioning of the inner lid 50 and the light source plate 60 with respect to the base cover 10.

[0044] The base cover 10, the inner lid 50, and the light source plate 60 may be uniquely positioned in the circumferential direction by other fitting methods. For example, the base cover second fitting portion may be formed by the inner peripheral wall of the base cover 10 protruding inward in the radial direction, and in this case, the outer peripheral walls of the inner lid 50 and the light source plate 60 are formed corresponding to fitting portions recessed inward in the radial direction that fit with the base cover second fitting portion.

[0045] 2, 3, 5 and 11, the top cover 20 is provided in the opening of the base cover 10, and the top cover 20 and the base cover 10 are engaged with each other.

[0046] The inner peripheral wall of the base cover 10 is partially recessed radially outward to form the base cover second slots 12. In this embodiment, there are three base cover second slots 12, and the three base cover second slots 12 are uniformly distributed in the circumferential direction. Top cover snaps 21 (three in this embodiment) corresponding to the base cover second slots 12 that protrude radially outward are formed on the opening periphery of the top cover 20, and the top cover snaps 21 fit into the base cover second slots 12 to tightly connect the base cover 10 and the top cover 20.

[0047] It is preferable that a plurality of notched application ports 22 are formed around the periphery of the opening of the top cover 20, and that an adhesive be applied near the application ports 22 to increase the strength of the connection between the base cover 10 and the top cover 20.

[0048] The present invention has at least one of the following advantages:

[0049] (i) The lighting device of the present invention uses a locking structure to position the internal components (particularly the circuit board and light source plate) relative to the cover, eliminating the need for screws. When placing electrical circuits on the circuit board, they are not affected by screw holes, optimizing space utilization, simplifying the assembly process, and reducing production costs.

[0050] (ii) The structural design of each component in the lighting device is reasonable, does not interfere with each other, and is accurately positioned.

[0051] (Modification) Naturally, the present invention is not limited to the above-described embodiments, and also includes forms obtained by applying various modifications to the above-described embodiments that a person skilled in the art may conceive, and forms realized by arbitrarily combining the components and functions of each embodiment within the scope that does not deviate from the spirit of the present invention.

[0052] For example, (i) in the above-described embodiment, there are three base cover first fitting portions 11, three base cover second slots 12 and three base cover fastening portions 13, and each set of team base cover first fitting portions 11, second base cover slots 12 and base cover fastening portions 13 are aligned circumferentially, but this is not necessarily required, and the present invention does not limit the quantity and circumferential positions of each of the above-described structures.

[0053] (ii) The screws 80 for fixing the heat sink 30 can be omitted.

[0054] (iii) Although the base cover fastening portion 13 plays a role in axial positioning with respect to the circuit board 40, since the light source plate 60, the inner lid 50 and the circuit board 40 abut against each other, the base cover fastening portion 13 can be omitted.

[0055] (iv) Either one of the heat sink first protrusion 32a or the heat sink second protrusion 32b may be left and the other omitted, and correspondingly, either one of the circuit board first positioning opening 41a or the circuit board second positioning opening 41b may be left.

[0056] (v) Holes may be further provided on the light source plate 60, the inner lid 50, and the circuit board 40, through which conductors connecting the light source plate 60 and the circuit board 40 pass. [Explanation of symbols]

[0057] 10 Base cover 11 Base cover first fitting 12 Base cover second slot 13 Base cover fastener 14 Base cover protrusion 15 Base cover positioning groove 20 Top cover 21 Top cover snap 22 Application port 30 Heat sink 31 Heat sink positioning groove 32a Heat sink first protrusion 32b Heat sink second protrusion 33 Heat sink groove positioning groove 34 Heat dissipation silica gel groove 40 Circuit Board 41a Circuit board first positioning hole 41b Circuit board second positioning hole 42 holes 50 Inner lid 51 Inner cover positioning groove 52 Inner cover positioning protrusion 60 Light source board 61 Light source plate axial direction positioning protrusion 62 Light source plate circumferential positioning protrusion 70 Connect Pin 80 Screws 90 Heat dissipating silica gel A axis direction R Radial direction

Claims

1. The device includes a cylindrical base cover, a heat sink housed in an internal cavity of the base cover, a circuit board, an inner lid, and a light source plate, the heat sink is fixed to the base cover at least in a circumferential direction of the base cover, and the heat sink, the circuit board, the inner cover, and the light source plate are arranged in this order in an axial direction of the base cover; the heat sink and the circuit board are in contact with each other, the circuit board and the inner lid are in contact with each other, and the inner lid and the light source plate are in contact with each other, The inner peripheral wall of the base cover is partially recessed radially outward or protrudes radially inward to form a base cover first fitting portion, and an outer peripheral region of the light source plate is partially fitted with the base cover first fitting portion, and the light source plate is positioned in the axial direction by the base cover first fitting portion. Lighting equipment.

2. The base cover first fitting portion is provided in a plurality of positions. The plurality of base cover first fitting portions are distributed at intervals in the circumferential direction of the base cover.

10. The lighting device of claim 1.

3. A device comprising: a cylindrical base cover; a heat sink housed in an internal cavity of the base cover; a circuit board; an inner cover; and a light source plate; the heat sink is fixed to the base cover at least in a circumferential direction of the base cover, and the heat sink, the circuit board, the inner cover, and the light source plate are in contact with each other in an axial direction of the base cover, The inner peripheral wall of the base cover is partially recessed radially outward or protrudes radially inward to form a base cover first fitting portion, an outer peripheral region of the light source plate is partially fitted with the base cover first fitting portion, and the light source plate is positioned in the axial direction by the base cover first fitting portion, the inner circumferential wall of the base cover further partially protrudes radially inward to form a plurality of base cover stoppers distributed in the circumferential direction of the base cover; the heat sink and the base cover fastener are located on both sides of the circuit board in the axial direction, In the radial direction of the base cover, the base cover fastening portion partially extends to an area where the circuit board is present, and presses the circuit board against the heat sink, thereby positioning the circuit board in the axial direction. Lighting equipment.

4. an outer peripheral wall of the heat sink is partially recessed radially inward to form a plurality of heat sink positioning grooves; The heat sink positioning groove prevents interference between the heat sink and the base cover fastener during mounting.

4. The lighting device according to claim 3.

5. A device comprising: a cylindrical base cover; a heat sink housed in an internal cavity of the base cover; a circuit board; an inner cover; and a light source plate; the heat sink is fixed to the base cover at least in a circumferential direction of the base cover, and the heat sink, the circuit board, the inner cover, and the light source plate are in contact with each other in an axial direction of the base cover, The inner peripheral wall of the base cover is partially recessed radially outward or protrudes radially inward to form a base cover first fitting portion, an outer peripheral region of the light source plate is partially fitted with the base cover first fitting portion, and the light source plate is positioned in the axial direction by the base cover first fitting portion, An elastic material is provided between the light source plate and the inner lid, and / or an elastic material is provided between the inner lid and the circuit board. Lighting equipment.

6. The peripheral regions of the opposing end faces of the heat sink and the circuit board can be fitted together at a unique relative circumferential position of the heat sink and the circuit board. The lighting device according to any one of claims 1 to 5.

7. A heat sink including a cylindrical base cover, a heat sink housed in an internal cavity of the base cover, a circuit board, an inner cover, and a light source plate, the heat sink is fixed to the base cover at least in a circumferential direction of the base cover, and the heat sink, the circuit board, the inner cover, and the light source plate are in contact with each other in an axial direction of the base cover, The inner peripheral wall of the base cover is partially recessed radially outward or protrudes radially inward to form a base cover first fitting portion, an outer peripheral region of the light source plate is partially fitted with the base cover first fitting portion, and the light source plate is positioned in the axial direction by the base cover first fitting portion, The inner circumferential wall of the base cover is partially recessed radially outward or protrudes radially inward to form a base cover second fitting portion, The outer peripheral wall of the inner lid is partially protruded radially outward or recessed radially inward to be fitted with the second fitting portion of the base cover, so that the inner lid and the base cover do not rotate relatively in the circumferential direction, The outer peripheral wall of the light source plate is partially protruded outward in the radial direction or recessed inward in the radial direction to be fitted with the second fitting portion of the base cover, so that the light source plate and the base cover do not rotate relatively in the circumferential direction. Lighting equipment.

8. A heat sink including a cylindrical base cover, a heat sink housed in an internal cavity of the base cover, a circuit board, an inner cover, and a light source plate, the heat sink is fixed to the base cover at least in a circumferential direction of the base cover, and the heat sink, the circuit board, the inner cover, and the light source plate are in contact with each other in an axial direction of the base cover, The inner peripheral wall of the base cover is partially recessed radially outward or protrudes radially inward to form a base cover first fitting portion, an outer peripheral region of the light source plate is partially fitted with the base cover first fitting portion, and the light source plate is positioned in the axial direction by the base cover first fitting portion, an inner circumferential wall of the base cover partially protrudes radially inward or is recessed radially outward to form a base cover third fitting portion; The outer peripheral wall of the heat sink is partially recessed inward in the radial direction or protrudes outward in the radial direction to be fitted with the third fitting portion of the base cover, so that the heat sink and the base cover do not rotate relatively in the circumferential direction. Lighting equipment.

9. A heat sink comprising a cylindrical base cover, a heat sink housed in an internal cavity of the base cover, a circuit board, an inner cover, a light source plate, and one or more connect pins; the heat sink is fixed to the base cover at least in a circumferential direction of the base cover, and the heat sink, the circuit board, the inner cover, and the light source plate are in contact with each other in an axial direction of the base cover, The inner peripheral wall of the base cover is partially recessed radially outward or protrudes radially inward to form a base cover first fitting portion, an outer peripheral region of the light source plate is partially fitted with the base cover first fitting portion, and the light source plate is positioned in the axial direction by the base cover first fitting portion, The connect pin extends from an exterior of the base cover into an interior cavity of the base cover; the circuit board has a hole through which the connect pin passes, the connect pin extends partially into an interior cavity of the inner lid; The connect pin and the inner lid do not come into contact with each other. Lighting equipment.

10. The lighting device further includes a top cover. The top cover and the base cover are engaged with each other. The lighting device according to any one of claims 1 to 9.

Images