Lighting equipment

Abstract

A lighting device is provided that uses a conductor to reduce the number of manufacturing steps. [Solution] The lighting device comprises an LED module 3, a power supply circuit unit 4, a base member 2 on which an LED board 31 of the LED module 3 and a circuit board 41 of the power supply circuit unit 4 are arranged on the front and back sides, a conductor 45 provided on the circuit board 41 and for electrically connecting the LED board 31 and the circuit board 41, a first through hole 31a (for inserting the conductor 45) and a conductive spring piece 35 (which blocks the first through hole 31a and elastically deforms as the conductor 45 passes through the first through hole 31a) provided on the LED board 31, a second through hole 21a for inserting the conductor 45 is provided in the base member 2, and the conductor 45 stands upright so as to pass through the through holes 31a, 21a from the overlapping part of the LED board 31 and circuit board 41 in the front and back directions, and connects to the conductive spring piece 35 by bringing the LED board 31 and circuit board 41 closer together.

Description

[Technical field]

[0001] The present invention relates to a lighting device including an LED element and a power supply circuit unit. [Background technology]

[0002] In recent years, due to growing environmental awareness, LED lighting devices that use LED elements, which are highly energy-efficient, as their light source have become increasingly popular, and technology has been proposed to provide inexpensive LED modules in which LED elements are mounted on an LED substrate (for example, Patent Document 1). The technology of Patent Document 1 involves inserting a metal pin into a through hole in the LED substrate so as to electrically connect to the wiring pattern on the LED substrate. Since electrical connection with the outside is made via the metal pin, manufacturing man-hours can be reduced. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-258606 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the above technology, the electrical connection between the metal pin (conductor) and an external part other than the LED module (e.g., a power supply circuit unit, etc.) is not specific, and depending on the shape of the external terminal to be connected, there may be cases where the manufacturing man-hours cannot be reduced. An object of the present invention is to provide a lighting device that uses a conductor and can reduce the number of manufacturing steps. [Means for solving the problem]

[0005] The present invention relates to an LED module in which an LED element is mounted on an LED board; a power supply circuit unit in which a plurality of circuit components are mounted on a circuit board and which supplies power to the LED element; a base member on which the LED board is disposed on a front side and the circuit board is disposed on a back side; a plurality of conductors provided on one of the LED board or the circuit board and electrically connecting the LED board and the circuit board; a first through hole provided on the other of the LED board or the circuit board and through which the conductors pass; a conductive spring piece that covers the first through hole and elastically deforms as the conductor passes through the first through hole, wherein a second through hole for inserting the conductor is provided in the base member, the LED board and the circuit board are vertical and partially overlap each other in the front-to-back direction, the conductor is erected so as to pass through the first through hole from the portion that overlaps with the circuit board in the front-to-back direction, and by bringing the LED board and the circuit board closer to each other, the multiple conductors pass through the first through hole and the second through hole and are electrically connected to the conductive spring piece. Effect of the Invention

[0006] According to the above configuration, a conductive spring piece is provided on the counterpart side that makes electrical connection with the conductor, so that electrical connection can be reliably made by relatively inserting the conductor through the through hole of the counterpart board. [Brief description of the drawings]

[0007] [Figure 1] 1 is a front view of a lighting device according to a first embodiment. [Diagram 2] 1 is a sectional front view of a lighting device according to a first embodiment. [Diagram 3] In the first embodiment, (a) is a perspective view of the lighting device with the housing removed from the front side, and (b) is a perspective view of the lighting device with the housing removed from the back side. [Figure 4]In the first embodiment, (a) is an oblique view from the front side showing a state in which a power supply circuit unit and an LED module are attached to a base member, and (b) is an oblique view from the back side showing a state in which a power supply circuit unit and an LED module are attached to a base member. [Diagram 5] In the first embodiment, (a) is an oblique view of the cross section of a base member with a power supply circuit unit and an LED module attached thereto, viewed from the front side, and (b) is an oblique view of the cross section of a base member with a power supply circuit unit and an LED module attached thereto, viewed from the back side. [Figure 6] FIG. 13(a) is a perspective view of the lighting device according to the second embodiment as seen from the front side, and FIG. 13(b) is a perspective view of the lighting device according to the second embodiment as seen from the back side. [Figure 7] In the second embodiment, (a) is a perspective view of the lighting device with the light-transmitting cover removed from the lighting device as viewed from the front side, and (b) is a perspective view of the lighting device with the inner cover removed from the state of (a) as viewed from the front side. [Figure 8] In the second embodiment, (a) is a perspective view of the lighting device as seen from the back side, and (b) is a perspective view of the lighting device as seen from the back side with the back cover removed from the state of (a). [Figure 9] In the second embodiment, (a) is a diagram showing the lighting device as viewed from the back side with the back cover removed, and (b) is a diagram showing the lighting device as viewed from the front side with the light-transmitting cover and inner cover removed. [Figure 10] 10A and 10B are diagrams illustrating electrical connection between a power supply circuit unit and an LED module in the second embodiment. [Figure 11] FIG. 11 is a cross-sectional view illustrating an electrical connection between a power supply circuit unit and an LED module in the second embodiment. [Figure 12] FIG. 11 is a cross-sectional view illustrating the fixing of the LED module in the second embodiment. [Figure 13] FIG. 11 is a front view of an illumination device according to a third embodiment. [Figure 14] FIG. 11 is an exploded perspective view of a lighting device according to a third embodiment. [Figure 15] FIG. 11 is a cross-sectional view of a lighting device according to a third embodiment. [Figure 16] In the third embodiment, (a) is a cross section taken along line AA in FIG. 13, as viewed from the direction of the arrow, and (b) is a cross section taken along line BB in FIG. 13, as viewed from the direction of the arrow. [Figure 17] In the third embodiment, (a) is a perspective view of a cylindrical body seen from the light-transmitting cover side, and (b) is a perspective view of the cylindrical body seen from the base side. [Figure 18] FIG. 13 is an exploded perspective view of a lighting device according to a fourth embodiment. [Figure 19] FIG. 11 is a cross-sectional view of a lighting device according to a fourth embodiment. [Figure 20] In the fourth embodiment, (a) is a cross section corresponding to the AA cross section in FIG. 13, seen from the direction of the arrow, and (b) is a cross section corresponding to the BB cross section in FIG. 13, seen from the direction of the arrow. [Figure 21] In the fourth embodiment, (a) is a perspective view of a cylindrical body seen from the light-transmitting cover side, and (b) is a perspective view of the cylindrical body seen from the base side. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] <Summary> In an illumination device according to one aspect of the embodiment, the illumination device includes an LED module in which an LED element is mounted on an LED board, a power supply circuit unit in which a plurality of circuit components are mounted on a circuit board and which supplies power to the LED element, a base member on which the LED board is disposed on a front side and the circuit board is disposed on a back side, a plurality of conductors provided on one of the LED board or the circuit board and electrically connecting the LED board and the circuit board, a first through hole provided on the other of the LED board or the circuit board and through which the conductors pass, and a second through hole provided on the other of the LED board or the circuit board. a conductive spring piece that is provided in the base member, covers the first through hole, and elastically deforms as the conductor passes through the first through hole, wherein a second through hole for inserting the conductor is provided in the base member, the LED board and the circuit board are vertical and partially overlap each other in the front-to-back direction, the conductor is erected so as to pass through the first through hole from the portion that overlaps with the circuit board in the front-to-back direction, and by bringing the LED board and the circuit board closer to each other, the multiple conductors pass through the first through hole and the second through hole and are electrically connected to the conductive spring piece. In a lighting device according to another aspect of the embodiment, an insulating box is provided that houses at least a portion of the conductor and the circuit board in a state parallel to the front-back direction. In a lighting device according to another aspect of the embodiment, the lighting device has a housing that houses the insulating box, which is inserted from the front side, in a state parallel to the front-back direction. In a lighting device according to another aspect of the embodiment, the base member has a plurality of heat dissipation fins extending to the rear side of the peripheral portion except for the central portion of the base member, the second through hole is provided in the central portion, and the insulating box is provided in the central portion so as to be surrounded by the plurality of heat dissipation fins. According to one aspect of the specification, there is provided an illumination device comprising an LED module in which an LED element is mounted on an LED board, and a power supply circuit unit in which a plurality of circuit components are mounted on the circuit board and which supplies power to the LED element, wherein a conductor electrically connecting the LED board and the circuit board is provided on one of the LED board and the circuit board, and the other of the LED board and the circuit board is provided with a through hole through which the conductor is inserted, and a conductive spring piece that closes the through hole and elastically deforms as the conductor passes through the through hole, the LED board and the circuit board are in a parallel state and partially overlap each other in the front-to-back direction, the conductor provided on the one board is erected so as to pass through the through hole from a portion of the one board that overlaps with the other board in the front-to-back direction, and by bringing the LED board and the circuit board closer to each other, the conductor passes through the through hole and is electrically connected to the conductive spring piece. In a lighting device according to another aspect of the specification, the one substrate is the circuit substrate, the other substrate is the LED substrate, and the conductive spring piece is provided on the surface of the LED substrate opposite the circuit substrate. In a lighting device according to another aspect of the specification, the lighting device is provided with a plate-shaped base member on whose front surface the LED board is mounted and whose back surface the circuit board is mounted, the LED board being disc-shaped and a portion of the LED board close to its peripheral portion being fastened to the base member by a fastener. In a lighting device according to another aspect of the specification, the conductor is plate- or rod-shaped, the conductive spring piece is formed by bending a rectangular metal plate, and has a hole for passing the conductor through in the center of the longitudinal direction of the metal plate, with both sides of the hole curved in an "L" shape. One embodiment of the specification provides an illumination device comprising an LED module having an LED element mounted on an LED board, and a power supply circuit unit having a plurality of circuit components mounted on the circuit board and supplying power to the LED element, wherein a conductor electrically connecting the LED board and the circuit board is provided on one of the LED board and the circuit board, and the other of the LED board and the circuit board is provided with a through hole through which the conductor is inserted, and a conductive spring piece that covers the through hole and elastically deforms as the conductor passes through the through hole, and the other board is fastened to the base member by a fastener at a portion where the surface on the side where the one board is present abuts against the base member. In a lighting device according to another aspect of the present specification, the one substrate is the circuit substrate, and the other substrate is the LED substrate. In the lighting device according to another aspect of the specification, the LED board is disk-shaped, and a portion of the LED board close to the peripheral portion is fastened to the base member by the fastener, thereby reducing blocking of the light emitted from the LED element. In a lighting device according to another aspect of the present invention, the fastener is a screw body, which makes it easy to fix the other substrate to the base member.

[0009] <First embodiment> 1. Overview The first embodiment will be described with reference to FIGS. The lighting device 1 according to the first embodiment is a so-called spotlight that is attached to a duct rail (not shown) on a ceiling or the like when in use. 2, the lighting device 1 includes a base member 2, an LED module 3 on the front side of the base member 2, and a power supply circuit unit 4 on the back side of the base member 2. The power supply circuit unit 4 and the LED module 3 are electrically connected by a metal pin 45. The lighting device 1 further includes a lens member 5 that is attached to the base member 2 and covers the LED module 3 from the front side, a housing 6 that houses the base member 2, the LED module 3, the power circuit unit 4 and the lens member 5, a plug box 7 for mounting the lighting device 1 to a duct rail, and an arm 8 that connects the plug box 7 and the housing 6.

[0010] 2.Each part configuration (1) Base material The following description will be mainly given with reference to FIG. The base member 2 has a disk-shaped base portion 21, a fin portion 25 having a plurality of fins 23 extending rearward from the rear surface of the base portion 21, and an attachment portion 27 for attaching the base member 2 to the arm 8. The base portion 21 has a pair of through holes 21a for the metal pins 45 in the central portion. There are a plurality of fins 23, which are erected on the peripheral portion of the base portion 21 except for the central portion. The mounting portion 27 is composed of an extension piece 27a extending from two positions on the back surface of the base portion 21 that sandwich the center of the base portion 21 to the back side, and a screw hole 27b provided on the extension piece 27a and directed toward the central axis of the housing 6. As shown in FIG. 2, a screw body 11 that connects to the arm 8 is screwed into this screw hole 27b. As shown in FIG. 2 and FIG. 3, a power supply circuit unit 4 is disposed in the space in the central portion of the back side of the base portion 21.

[0011] (2) LED module The following description will be given mainly with reference to FIG. 4(a) and FIG. 5(a). The LED module 3 is composed of an LED substrate 31 and a plurality of LED elements 33. The LED substrate 31 has a through hole 31a for the metal pin 45. The LED module 3 has a metal spring piece 35 on the LED substrate 31 that comes into contact with the metal pin 45. The metal spring piece 35 is formed by bending a thin rectangular metal plate at the center in the longitudinal direction. As shown in FIG. 5(a), the portion from the bent portion to one end of the metal spring piece 35 forms a fixed portion 35a that is fixed to the LED substrate 31. As shown in FIG. 5(a), the portion from the bent portion to the other end of the metal spring piece 35 forms a metal spring piece 35b that closes the through hole 31a of the LED substrate 31 and elastically deforms in accordance with the insertion (passage) of the metal pin 45. As shown in FIG. 4(a), the LED substrate 31 is fixed to the base portion 21 by a screw body 37 in a state in which the rear surface of the LED substrate 31 contacts the front surface of the base portion 21.

[0012] (3) Power supply circuit unit This will be explained with reference to FIG. 2 to FIG. As shown in Fig. 2, the power supply circuit unit 4 is accommodated in an insulating box 43 with circuit components mounted on a circuit board 41. As shown in Fig. 5, the power supply circuit unit 4 has an insulating box 43 (not shown in Fig. 5), a metal pin 45 that penetrates the through hole 21a of the base portion 21 and the through hole 31a of the LED board 31 and contacts the metal spring piece 35 of the LED module 3. The circuit board 41 here is supported in the insulating box 43 in a state perpendicular to the LED board 31. The insulating box 43 also has a function of blocking heat released from the fins 23 of the base member 2.

[0013] (4) Lens components This will be explained with reference to FIG. 2 and FIG. As shown in Figures 2 and 3, the lens member 5 has a plurality of lenses 51 arranged opposite each LED element 33, a connecting plate 53 connecting the lenses 51 on the side opposite the LED elements 33, a tubular portion 55 extending cylindrically from the outer peripheral edge of the connecting plate 53 toward the base portion 21, and a fixing portion 57 for fixing the lens member 5 to the base member 2. The inner diameter of the cylindrical portion 55 is larger than the outer diameter of the LED board 31. The fixing portion 57 is formed of a portion recessed from the cylindrical portion 55 in the direction of the central axis of the cylindrical portion 55, and a groove for a screw is provided in the recessed portion. The lens member 5 is fixed to the base portion 21 with the rear surface of the fixing portion 57 abutting against the peripheral portion of the front surface of the LED substrate 31. The height of the tube portion 55 is set so that the distance between the lens 51 and the LED element 33 is a predetermined value. In addition, an inner flange portion 63b of a front housing 63 described later fits into the gap between the tube portion 55 of the lens member 5 and the base portion 21 of the base member 2, as shown in FIG.

[0014] (5) Housing The following description will be mainly made with reference to FIG. 1 and FIG. The housing 6 mainly includes a back housing 61 disposed on the back side of the base portion 21 of the base member 2, and a front housing 63 disposed on the outer side of the LED module 3 and the lens member 5. The rear housing 61 has a cylindrical shape with a bottom, and an open end is connected to the front housing 63. The rear housing 61 has a through hole 61c (see FIG. 1) in the peripheral wall 61a and the bottom wall 61b, and a through hole 61d (see FIG. 2) in the peripheral wall 61a. The through hole 61c is for heat dissipation. The through hole 61d is for attachment to the arm 8, and a screw body 11 that screws into the screw hole 27b of the attachment portion 27 of the base member 2 is inserted through it. In this way, the rear housing 61 is attached to the arm 8 together with the base member 2 in a manner that allows the posture of the rear housing 61 to be adjusted. The front housing 63 has a tube portion 63a and an inner flange portion 63b extending inward from the rear opening end of the tube portion 63a. As shown in Fig. 2, the inner flange portion 63b fits into the gap between the tube portion 55 of the lens member 5 and the base portion 21 of the base member 2. In this way, the front housing 63 is attached to the base member 2.

[0015] (6) Plug box This will be explained with reference to FIG. 2 and FIG. The plug box 7 comprises a housing 71, an electrode plug 73 with an operating lever provided on the back surface of the housing 71, a positioning portion 75 provided on the back surface of the housing 71, and an arm connecting member 77 housed within the housing 71. The housing 71 has a long rectangular parallelepiped shape along the duct rail. The housing 71 has a housing body 71a having an opening on the back side, a cover 71b that covers the opening of the housing body 71a, and a protruding part 71c that protrudes from the surface of the housing body 71a in a cylindrical shape with a bottom. The cover 71b has a rectangular plate shape and has positioning portions 75 at both ends on the rear side in the longitudinal direction. The positioning portions 75 extend to the rear side and fit into grooves in the duct rail. The electrode plug 73 comprises a bottomed tubular portion 73a extending into a cylindrical shape with a bottom from a through hole in the lid body 71b, a pair of electrodes 73b, 73b provided at the tip side of the bottomed tubular portion 73a, and an operating lever 73c provided at the longitudinal center of the bottomed tubular portion 73a, and the front portion of the bottomed tubular portion 73a is supported inside the housing 71 so as to be freely rotatable around the central axis. The arm connecting member is constituted by a nut body 77. The nut body 77 is screwed into a screw body 85 extending from the arm 8. 2 and 3(b), the cover 71b is fixed to the housing body 71a by screwing the screw body 13 into a screw hole of a boss on the inner surface of the front wall of the housing body 71a. An electric cable connected to the electrode 73b is led from inside the bottomed cylindrical portion 73a through the inside of the nut body 77 and into the inside of the arm 8.

[0016] (7) Arm The explanation will be mainly based on FIG. The arm 8 has a hollow "U" shape, and rotatably holds the rear housing 61 and the base member 2 with a pair of ends 81, 81 located on the opening side of the "U". The axis of rotation here is the direction connecting the pair of ends 81, 81. The arm 8 has a through hole 83 on the opposite side to the pair of ends 81, 81 on the opening side, and a screw body 85 disposed inside extends from the through hole 83 and enters the inside through a through hole in the protruding portion 71c of the plug box 7, and screws into the nut body 77.

[0017] 3. Connecting the LED board to the power circuit unit The explanation will be mainly based on FIG. The power supply circuit unit 4 has a pair of metal pins 45 at an end of the circuit board 41 on the LED module 3 side, and the metal pins 45 are inserted into the through holes 31a of the LED board 31 of the LED module 3. As the metal pins 45 pass through the through holes 31a, the metal spring pieces 35 elastically deform while maintaining contact with the metal pins 45. This allows the LED board 31 and the circuit board 41 to be reliably electrically connected. In this way, the electrical connection between the LED module 3 and the power circuit unit 4 can be easily achieved by simply inserting the metal pin 45 into the through hole 31a of the LED substrate 31.

[0018] 4. Fixing the LED board To attach the LED module 3, the LED board 31 is fixed to the base portion 21 of the base member 2 by a screw body 37, which is a fastener. At this time, since the LED board 31 abuts against the base portion 21, it is possible to reduce the application of excessive load to the LED board 31 when screwing the screw body 37 into the screw hole of the base portion 21. In this way, the screw body 37 that penetrates the abutting portion of the LED board 31 against the base portion 21 can be firmly fastened, and the screw body 37 can be prevented from coming loose due to the restoring force of the metal spring piece 35. <Second embodiment> 1. Overview The second embodiment will be described with reference to FIGS. The lighting device 201 according to the second embodiment is a so-called ceiling light that is attached to a ceiling or the like when used. 6, 7, and 8, the lighting device 201 includes a base member 202, an LED module 203 (see FIG. 7(b)) on the front side of the base member 202, and a power supply circuit unit 204 (see FIG. 8(b)) on the back side of the base member 202. The power supply circuit unit 204 and the LED module 203 are electrically connected by a metal pin 2045a (see FIGS. 10 and 11). As shown in Figures 6, 7 and 8, the lighting device 201 further includes an outer cover 205 (see Figure 6) attached to the base member 202 and covering the LED module 203 from the front side, an inner cover 206 (see Figure 7(a)) covering the LED module 203 inside the outer cover 205, a hook blade holding member 207 provided in a through hole in the center of the base member 202, and a rear cover 208 (see Figure 8(a)) attached to the base member 202 and covering the power supply circuit unit 204 from the back side.

[0019] 2.Each part configuration (1) Base material The following description will be given mainly with reference to FIG. 7 and FIG. The base member 202 has a through hole in the center and an annular front flat portion 2021 around the through hole. The hook blade holding member 207 described above is attached to the through hole, which is not shown in Fig. 7. The LED module 203 is attached to the surface of the front flat portion 2021 in a tight contact state. The base member 202 has an inner cylinder portion 2023 that extends cylindrically from the outer periphery of the front flat portion 2021 to the rear side. A rear cover 208 is attached to the inner cylinder portion 2023 to protect the power supply circuit unit 204 on the rear side of the front flat portion 2021. That is, as shown in FIG. 8, the front flat portion 2021, a part of the inner cylinder portion 2023, and the rear cover 208 form an accommodation space that accommodates the power supply circuit unit 204. The base member 202 has an annular back flat portion 2025 that extends from the back edge of the inner cylindrical portion 2023 to the outside of the inner cylindrical portion 2023 in parallel with the front flat portion 2021. A cushioning material 2013 is attached to the back surface of the back flat portion 2025. As shown in Figures 11 and 12, the base member 202 has an outer tube portion 2027 that extends cylindrically from the outer peripheral edge of the back flat portion 2025 to the front side, and an outer flange portion 2029 that protrudes radially outward from the front end edge of the outer tube portion 2027.

[0020] (2) LED module The following description will be given mainly with reference to FIG. 7(b) and FIG. The LED module 203 has a plurality of LED elements 2031 and an LED board 2033 on which the plurality of LED elements 2031 are mounted. The plurality of LED elements 2031 are used to emit light of different colors in order to adjust the color of the light. There are three LED modules 203, and the three LED modules 203 are arranged in a ring shape around a through hole (not shown in FIG. 7(b) and FIG. 9) in the center of the base member 202. The three LED boards 2033 are connected to each other by terminals 2033a via an electric cable (not shown). Each LED board 2033 is shaped like a letter V, and the LED elements 2031 are mounted in a row along the longitudinal direction of the LED board 2033. As a result, the plurality of LED elements 2031 are arranged in a circular ring shape or a hexagonal ring shape as a whole.

[0021] At least one LED substrate 2033A among the three LED substrates 2033 has a through hole 2033b for the metal pin 2045a, and a metal spring piece 2035 is provided in the LED substrate 2033A corresponding to the through hole 2033b as shown in Fig. 10. Although the through hole 2033b does not appear in the figure because of the metal spring piece 2035, "2033b" is added to distinguish it from the other through holes. The metal spring piece 2035 closes the through hole 2033b of the LED board 2033A and is elastically deformed as the metal pin 2045a passes through the through hole 2033b. The metal spring piece 2035 is connected to a wiring pattern (not shown) of the LED board 2033A. As shown in Fig. 10, the metal spring piece 2035 is formed by bending a rectangular thin metal plate. The metal spring piece 2035 has a through hole 2035a for the metal pin 2045a in the center of the longitudinal direction of the metal plate, and has "L"-shaped portions 2035b curved in a "L" shape on both sides of the through hole 2035a. The through hole 2035a is provided corresponding to the through hole 2033b of the LED substrate 2033A. The "L"-shaped portion 2035b has a bent portion of the "L" shape located on the inside (above the through hole 2035a). There are nine metal pins 2045a here. The metal pins 2045a are for dimming, color adjustment, sensors, and night lights.

[0022] (3) Power supply circuit unit The following description will be given mainly with reference to FIG. 8(b) and FIG. 9(a). The power supply circuit unit 204 includes a power conversion circuit for generating power to be supplied to the LED element 2031 from AC power, a dimming circuit for dimming the light, a color adjustment circuit for adjusting the color of the light, etc. The power supply circuit unit 204 is composed of a plurality of circuit components 2041, a circuit board 2043 on which the circuit components 2041 are mounted, and a connection part 2045 for electrically connecting to the LED module 203. Needless to say, the circuit components are electronic components that constitute the above-mentioned circuit, and only one circuit component 2041 is shown in Fig. 8(b) and Fig. 9(a) for convenience. The circuit board 2043 has a wiring pattern (not shown) for connecting a plurality of circuit components 2041 to configure the above circuit. The circuit board 2043 has an overall shape similar to the letter "L" with an arc-shaped outer periphery, and is disposed along a through hole (not shown in the figure due to the hook blade holding member 207) in the front flat portion 2021 of the base member 202. As shown in FIG. 12, the circuit board 2043 is fixed by a resin rivet 2015 with a gap between it and the front flat portion 2021 of the base member 202. This can improve electrical safety even when the base member 202 is made of a metal material. The circuit board 2043 is connected to a pair of hook blades 2071 on the hook blade holding member 207 via an electric cable 2047 .

[0023] The connection portion 2045 will be described with reference to FIG. The connection portion 2045 has nine metal pins 2045a extending toward the LED substrate 2033 and a support 2045b supporting the nine metal pins 2045a. The nine metal pins 2045a are supported by the support 2045b in an upright state with respect to the circuit substrate 2043 at intervals. The nine metal pins 2054a are arranged in a row. The metal pins 2054a are provided in a portion where the circuit substrate 2043 and the LED substrate 2033 overlap in the front-rear direction. The front flat portion 2021 of the base member 202 has one through hole through which the nine metal pins 2054a are inserted.

[0024] (4) Outer cover This will be explained with reference to FIG. 6 to FIG. Here, the outer cover 205 has a frame 2051 attached to the base member 202 side, and a dome-shaped light-transmitting cover 2053 attached to the frame 2051. The frame 2051 is annular with a through hole in the center, into which the rear portion of the base member 202 fits. The annular shape in this case is a circular ring. The frame 2051 has an annular portion 2051a, an inner peripheral groove portion 2051b that is provided on the inner peripheral edge of the annular portion 2051a and opens to the rear side, and a cylindrical portion 2051c that extends from the outer peripheral edge to the front side in a stepped cylindrical shape. 7(a), with the outer flange 2029 of the base member 202 fitted into the inner circumferential groove 2051b, an engagement piece 2051d provided on the inside of the inner circumferential groove 2051b engages with an engagement groove 2067 on the base member 202 side, so that the frame 2051 is removably attached to the base member 202. The engagement groove 2067 is formed between a frame mounting portion 2065 provided on the outer circumferential edge of the inner cover 206 and the back flat portion 2025 of the base member 202. As shown in FIG. 7, engaging protrusions 2051e that engage with engaging recesses (not shown) of the translucent cover 2053 are provided at intervals in the circumferential direction on the inner surface of the tubular portion 2051c, and the engaging protrusions 2051e engage with the engaging recesses to attach the translucent cover 2053 to the frame 2051.

[0025] (5) Inner cover This will be explained with reference to FIG. The inner cover 206 covers the LED module 203 in a state close to the LED module 203. This makes it possible to prevent a user from touching the LED element 2031, for example, when attaching the lighting device 201 to a hook ceiling or the like on an installation surface with the translucent cover 2053 removed. The inner cover 206 has a bulging portion 2061 that bulges outward in a dome shape, an annular portion 2063 that extends from the periphery of the bulging portion 2061 in parallel with the rear flat portion 2025, and a frame mounting portion 2065 for mounting the frame 2051. The annular portion 2063 has cutout portions spaced apart in the circumferential direction, and the frame mounting portion 2065 is provided corresponding to the cutout portions. The frame mounting portion 2065 extends outward like the annular portion 2063, but the extending position is on the front side of the annular portion 2063. As a result, an engagement groove 2067 is formed between the extending portion of the frame mounting portion 2065 and the rear flat portion 2025 of the base member 202. An engagement piece 2051d of the frame 2051 engages with this engagement groove 2067. Note that FIG. 7 shows a state before the frame 2051 engages with the engagement groove 2067 so that the engagement piece 2051d of the frame 2051 can be seen. The inner cover 206 is composed of two cover bodies 206A and 206B. The two cover bodies 206A and 206B are fixed to the base member 202 by screws.

[0026] (6) Hook blade holding member The following description will be given mainly with reference to FIG. 7 and FIG. The hook blade holding member 207 holds a pair of hook blades 2071, 2071 that are attached to a hook ceiling or the like on the installation surface. The hook blade holding member 207 has a bottomed tubular part 2073 (see FIG. 8) that is inserted into the through hole of the base member 202 from the front side and has an opening on the front side, a flat part 2075 (see FIG. 7(b)) that extends outward from the opening side edge of the bottomed tubular part 2073 and abuts on the periphery of the through hole of the base member 202, and a protruding part 2077 that protrudes from the bottom part of the bottomed tubular part 2073 to the front side in a hollow shape and has the hook blades 2071, 2071 provided in the internal space. The hook blade holding member 207 is made of a highly transparent resin material. The protruding part 2077 is used by a user to grip when installing the lighting device 201.

[0027] (7) Back cover The following description will be given mainly with reference to FIG. 8(a) and FIG. The rear cover 208 covers the rear side of the inner cylinder portion 2023 of the base member 202 in a fan shape except for the bottom portion of the bottomed cylinder portion 2073 of the hook blade holding member 207. The rear cover 208 has a plate portion 2081 having an opening corresponding to the bottom portion of the bottomed cylinder portion 2073, and a semi-cylindrical portion 2083 (see FIG. 11) that extends from the plate portion 2081 through the inner cylinder portion 2023 of the base member 202 to the front side and abuts against the front flat portion 2021.

[0028] <Third embodiment> 1. Overall structure An overview of an illumination device 4001 according to this embodiment will be described mainly with reference to FIGS. The lighting device 4001 includes an LED module 4003 and a power supply circuit unit 4005 inside an enclosure 4007. The lighting device 4001 receives AC power, which is a commercial power source, from a base 4077 that constitutes part of the enclosure 4007, and causes an LED element 4031 to emit light (light up) using the DC power converted by the power supply circuit unit 4005. Here, the enclosure 4007 is composed of four members: a light-transmitting cover 4071, a cylindrical body 4073, a base holder 4075, and a base 4077. The LED module 4003 is located on the light-transmitting cover 4071 side, and the power supply circuit unit 4005 is located on the base 4077 side.

[0029] 2.Each part configuration (1) LED module This will be explained using FIG. The LED module 4003 has one or more LED elements 4031 , an LED substrate 4033 on which the LED elements 4031 are mounted, and a connection portion 4035 for connection to the power supply circuit unit 4005 . Here, six LED elements 4031 are mounted. The LED substrate 4033 is disk-shaped, and the six LED elements 4031 are arranged in an annular shape (for example, annular) at equal intervals in the circumferential direction near the peripheral edge of the LED substrate 4033. The LED substrate 4033 has a plurality of through holes 4033a (two here) for fixing the LED module 4003 to the cylinder 4073. The connection part 4035 here is provided on the inner part of the ring in which the LED elements 4031 are arranged. The connection part 4035 is electrically connected to a wiring pattern that supplies power to the LED elements 4031. The connection part 4035 is composed of a through hole 4035a provided in the LED substrate 4033 and a metal spring piece 4035b provided on the LED substrate 4033.

[0030] The metal spring pieces 4035b are provided around the through holes 4035a so as to come into contact with the extension portions of the metal pins 4055a that extend from the through holes 4035a. Here, the metal spring pieces 4035b are provided for each of the through holes 4035a. The metal spring piece 4035b closes the through hole 4035a of the LED substrate 4033, and is elastically deformed as the metal pin 4055a passes through. There is a pair of metal spring pieces 4035b, and the metal spring pieces 4035b are hook-shaped. The pair of metal spring pieces 4035b, 4035b are arranged on either side of the through hole 4035a, with the curved or bent portion positioned above the through hole 4035a. The end of the metal spring piece 4035b opposite to the curved or bent side is fixed to the LED substrate 4033.

[0031] (2) Power supply circuit unit The following description will mainly use FIG. The power supply circuit unit 4005 includes a power supply circuit for generating, from AC power, the power to be supplied to the LED element 4031. The power supply circuit unit 4005 includes a plurality of circuit components 4051, a circuit board 4053 on which the circuit components 4051 are mounted, and a connection section 4055 for connecting to the LED module 4003.

[0032] The circuit components 4051 are electronic components that constitute the power supply circuit. The circuit board 4053 has a wiring pattern for connecting a plurality of circuit components 4051 to configure the power supply circuit. The circuit board 4053 has a rectangular shape as a whole, and is disposed along the central axis of the cylindrical body 4073. The circuit board 4053 here is disposed parallel to the central axis of the cylindrical body 4073, and is disposed so as to be located on the central axis. Also, the circuit board may be disposed so as to be positioned offset from the central axis, which is different from the present embodiment. The circuit board 4053 has a pair of notches 4053a on the base 4077 side. The notches 4053a here are rectangular. In other words, the circuit board 4053 has a pair of overhangs 4053b on the LED module 4003 side. The overhangs 4053b are inserted into the groove 4735a on the inner circumferential surface of the cylindrical body 4073 from the side where the LED module 4003 exists, and engage with the groove 4735a. The lengths of the overhangs 4053b and the groove 4735a of the circuit board 4053 are configured so that the edge of the circuit board 4053 on the LED module 4003 side approaches or abuts against the LED board 4033 of the LED module 4003 when the circuit board 4053 and the LED module 4003 are assembled into the cylindrical body 4073. Moreover, the edge of the circuit board 4053 on the base 4077 side is configured to be located inside the cylindrical body 4073 without extending into the inside of the base holder 4075 .

[0033] The connection portion 4055 is provided at an end of the circuit board 4053 on the LED module 4003 side, and is electrically connected to the wiring pattern of the circuit board 4053. The connection portion 4055 is configured by a metal pin 4055a. The metal pin 4055a is fixed to the circuit board 4053 with its tip extending from the circuit board 4053 to the LED module 4003 side. There are two metal pins 4055a, which are provided with a gap between them.

[0034] (3)Envelope (3-1)Translucent cover The following description will be given mainly with reference to FIG. 14 and FIG. The light-transmitting cover 4071 covers the LED module 4003 and transmits light emitted from the LED module 4003 to emit the light. The light-transmitting cover 4071 has a shape, for example, of a hollow oval sphere with the short axis side end cut by a plane. The light-transmitting cover 4071 has a step 4071a, which is an attachment part, at the open end. The step 4071a here is configured such that the inner peripheral side part protrudes from the open end face. In other words, the step 4071a is recessed at the outer peripheral side of the open end of the light-transmitting cover 4071. The light-transmitting cover 4071 is attached to the cylinder 4073 using, for example, an adhesive, with the portion having the step 4071a fitting into the step 4738a at the open end of the cylinder 4073 on the LED module 4003 side. The light-transmitting cover 4071 is made of, for example, a resin material having light-transmitting properties. If necessary, the light-transmitting cover 4071 may have diffusion particles mixed into the resin material, or may have an inner or outer peripheral surface subjected to a diffusion treatment.

[0035] (3-2) Cylindrical body The following description will be given with reference to Figs. 14 to 17, and particularly Fig. 17. The cylindrical body 4073 mainly functions to mount the LED module 4003 and the power supply circuit unit 4005. The cylindrical body 4073 here has a function to house the power supply circuit unit 4005 therein and mount the LED module 4003. The power supply circuit unit 4005 is mounted to the cylindrical body 4073 by utilizing the LED module 4003.

[0036] The inner diameter of the cylinder 4073 is approximately constant except for the open end on the LED module 4003 side. The outer diameter of the cylinder 4073 increases along the central axis from the open end on the base 4077 side to the open end on the LED module 4003 side, and the overall external shape of the cylinder 4073 is tapered. The cylindrical body 4073 has a plurality of grooves 4731 spaced apart in the circumferential direction on its outer circumferential surface, and the spaces between adjacent grooves 4731 in the circumferential direction form fins 4732 for heat dissipation. With this configuration, the cylindrical body 4073 functions as a heat sink that dissipates heat generated from the LED module 4003 and the power circuit unit 4005. The grooves 4731 are recessed toward the central axis and extend parallel to the central axis. In Figs. 14 and 17, the tips of the drawn wires of the grooves 4731 are indicated by arrows to distinguish them from the fins 4732.

[0037] The cylindrical body 4073 has a straight cylindrical section 4733 with constant inner and outer diameters, a tapered cylindrical section 4734 whose inner and outer diameters increase from the end of the straight cylindrical section 4733 on the LED module 4003 side in the central axial direction away from the straight cylindrical section 4733, fin sections 4732 provided on the outer periphery of the straight cylindrical section 4733 and the tapered cylindrical section 4734, a mounting section 4735 for mounting the power supply circuit unit 4005, and a fixing section 4736 for fixing the LED module 4003. As shown in FIGS. 14 to 17, the cylinder 4073 includes a metal cylinder 4074 that is in close contact with the inner circumferential surface of the straight cylinder portion 4733, excluding the end portion on the LED module 4003 side.

[0038] The cylindrical body 4073 has a plurality of "L"-shaped ribs 4737 (four in this example) spaced apart in the circumferential direction, which extend from the end of the tapered cylindrical portion 4734 on the straight cylindrical portion 4733 side and point toward the end on the base 4077 side. In other words, the cylindrical body 4073 includes a rib 4737 having an extension portion 4737a that extends parallel to the inner peripheral surface of the straight cylindrical portion 4733 at an interval radially inward from the inner peripheral surface of the straight cylindrical portion 4733, and a connecting portion 4737b that connects the end of the extension portion 4737a on the tapered cylindrical portion 4734 side to the tapered cylindrical portion 4734. The connecting portion 4737b extends in a direction perpendicular to the central axis of the cylindrical body 4073, and the extension portion 4737a extends parallel to the central axis. The metal tube 4074 is fitted between the extension 4737a of the rib 4737 and the inner peripheral surface of the straight tube portion 4733. Explaining the state in which the metal tube 4074 is fitted, the rib 4737 extends from the end of the tapered tube portion 4734 on the straight tube portion 4733 side toward the central axis (connection portion 4737b), and extends beyond the inner peripheral surface of the metal tube 4074 toward the end on the ferrule 4077 side (extension portion 4737a). In other words, the rib 4737 is provided along the end face and inner peripheral surface of the metal tube 4074.

[0039] The mounting portion 4735 and the fixing portion 4736 are provided on a rib 4737. The mounting portion 4735 here is provided on a pair of ribs 4737 that face each other across the central axis of the cylindrical body 4073, and the fixing portion 4736 is provided on a pair of ribs 4737 that face each other across the central axis and on which the mounting portion 4735 is not provided. As shown in Fig. 14 and Fig. 17, the mounting portion 4735 is configured with a groove 4735a provided across the connecting portion 4737b and the extending portion 4737a. The groove 4735a exists halfway to the end of the extending portion 4737a on the base 4077 side, and the length of the groove 4735a is approximately equal to the length of the protruding portion 4053b of the circuit board 4053. As shown in Fig. 14 and Fig. 17, the fixing portion 4736 is configured with a screw hole 4736a provided across the connecting portion 4737b and the extending portion 4737a. The end faces of the four connecting portions 4737b on the tapered tube portion 4734 side are at the same height when the end on the base 4077 side is used as a reference.

[0040] 17, the cylinder 4073 has a cover attachment portion 4738 for attaching the light-transmitting cover 4071 at the end of the tapered cylinder portion 4734 on the light-transmitting cover 4071 side. The cover attachment portion 4738 is configured with a step 4738a recessed from the inner periphery side. As shown in Fig. 17, the cylindrical body 4073 has a base fixing part 4739 for fixing the base 4077 at the end on the base 4077 side. Since the base 4077 is fixed via the base holder 4075, more precisely, the base fixing part 4739 is for fixing the base holder 4075. The base fixing part 4739 is composed of a step 4739a provided at the end on the base 4077 side of the straight cylindrical part 4733, and a recess provided on the circumferential surface parallel to the central axis that constitutes the step 4739a. The step 4739a is recessed on the outer periphery side. Here, the recess provided on the circumferential surface is composed of a circumferential groove 4739b extending in the circumferential direction. The cylindrical body 4073 is made of a resin material. The metal tube 4074 may be disposed in the cylindrical body by insert molding, in which the metal tube 4074 is molded integrally with the cylindrical body 4073, or the metal tube 4074 may be inserted after the cylindrical body 4073 is molded.

[0041] (3-3) Cap holder This will be explained with reference to FIG. 14 and FIG. The base holder 4075 has a cylindrical shape. The base holder 4075 has a large diameter cylindrical portion 4751 located on the cylindrical body 4073 side, a small diameter cylindrical portion 4753 located on the base 4077 side, and a tapered cylindrical portion 4755 connecting the large diameter cylindrical portion 4751 and the small diameter cylindrical portion 4753. The large diameter cylindrical portion 4751 has an inner diameter and an outer diameter larger than those of the small diameter cylindrical portion 4753. The tapered cylindrical portion 4755 linearly reduces in diameter toward the small diameter cylindrical portion 4753. The base holder 4075 has a cylinder side fixing part 4757 fixed to the cylinder 4073, and a base side fixing part to which the base 4077 is fixed. The cylinder side fixing part 4757 is constituted by a protrusion 4757a which fits into a circumferential groove 4739b which is a recess in the base fixing part 4739 of the cylinder 4073. The protrusions 4757a are provided on the inner peripheral surface of the end of the large diameter cylinder part 4751, and a plurality of them (four in this example) are provided at intervals in the circumferential direction. The base side fixing part is constituted by the outer peripheral surface of the small diameter cylinder part 4753, and the base 4077 is fixed to the base side fixing part via, for example, an adhesive.

[0042] (3-4) Base This will be explained with reference to FIG. 14 and FIG. Base 4077 has the same configuration as bases used in conventional light bulbs, and has a shell portion and an eyelet portion, with the eyelet portion attached to the shell portion via an insulating portion.

[0043] 3. Connecting the LED board to the power circuit unit The power supply circuit unit 4005 has a pair of metal pins 4055a at an end of the circuit board 4053 on the LED module 4003 side, and the metal pins 4055a are inserted into the through holes 4035a of the LED board 4033 of the LED module 4003. As the metal pins 4055a pass through the through holes 4035a, the metal spring pieces 4035b elastically deform while maintaining contact with the metal pins 4055a. This allows the LED board 4033 and the circuit board 4053 to be reliably electrically connected. In this way, the electrical connection between the LED module 4003 and the power supply circuit unit 4005 can be easily achieved by simply inserting the metal pin 4055a into the through hole 4035a of the LED substrate 4033.

[0044] 4. Fixing the power circuit unit and the LED module The following description will mainly use FIG. When installing the power supply circuit unit 4005, the side of the circuit board 4053 with the notched portion 4053a faces the tapered cylindrical portion 4734 of the cylindrical portion 4073, and the circuit board 4053 is inserted into the cylindrical portion 4073 until the edge of the protruding portion 4053b of the circuit board 4053 on the side of the notched portion 4053a abuts the end of the groove 4735a. The LED board 4033 is placed on the connecting portion 4737b of the rib 4737 of the cylindrical body 4073 so that the through hole 4035a of the LED module 4003 fits into the metal pin 4055a of the circuit board 4053 inserted into the groove 4735a. In this state, the screw portion of the screw body 4004 is inserted through the through hole 4033a of the LED board 4033 and screwed into the screw hole 4736a of the cylindrical body 4073. As a result, the power supply circuit unit 4005 is accommodated in the cylindrical body 4073, and the LED module 4003 is fixed to the cylindrical body 4073. At the same time, the power supply circuit unit 4005 and the LED module 4003 are electrically connected to each other.

[0045] The LED module 4003 can be attached with the LED board 4033 in contact with the end face of the connecting portion 4737b, so that the screw body 4004 penetrating the contact portion can be firmly fastened. This makes it possible to prevent the screw body 4004 from coming loose due to the restoring force of the metal spring piece 4035b. The power supply circuit unit 4005 is attached to the extension 4737a of the rib 4737 of the cylindrical body 4073. Therefore, there is no risk of contact with the metal tube 4074 inside the cylindrical body 4073, and no special insulation measures are required. The LED module 4003 is fixed in a state where it abuts on the surface of the connecting portion 4737b of the rib 4737 of the cylindrical body 4073 on the side of the light-transmitting cover 4071. Therefore, there is no risk of contact with the metal tube 4074 inside the cylindrical body 4073, and no special insulation measures are required. Furthermore, since the power supply circuit unit 4005 is positioned between the pair of ribs 4737 (extensions 4737a) and the overhanging portion 4053b is inserted into the groove 4735a, it is possible to prevent the circuit board 4053 from being displaced relative to the pair of ribs 4737 (extensions 4737a). As a result, even if the extensions 4737a attempt to separate from the metal tube 4074 due to long-term use, they are prevented from doing so by the circuit board 4053, and as a result, it is possible to ensure insulation between the power supply circuit unit 4005 and the metal tube 4074 for a long period of time. With the circuit board 4053 assembled in the cylindrical body 4073, the LED module 4003 is fixed to the cylindrical body 4073 so that the LED board 4033 is close to or in contact with the edge of the circuit board 4053. Therefore, no additional configuration is required to fix the circuit board 4053.

[0046] 5. Heat dissipation when the lamp is turned on When the lighting device 4001 is turned on, heat is generated from the LED module 4003 and the power supply circuit unit 4005. This heat is transferred to the fin portion 4732 of the cylinder 4073 via the metal cylinder 4074 and is dissipated. Metal tube 4074 is disposed on the inner periphery side of straight tube portion 4733, and most of the inner periphery surface of metal tube 4074 faces the internal space, except for the portion where four ribs 4737 are present. This allows the amount of heat transferred to metal tube 4074 to be increased.

[0047] <Fourth embodiment> 1. Overview The fourth embodiment will be described with reference to FIGS. The lighting device 5001 according to the fourth embodiment is also a so-called bulb-type lamp. Here, the same components as those of the lighting device 4001 according to the third embodiment are designated by the same reference numerals, and the description thereof will be omitted. Note that the same components may be shown only in the drawings. 19, the lighting device 5001 accommodates an LED module 4003 and a power circuit unit 4005 in an enclosure 5007. As shown in Fig. 18, the enclosure 5007 is composed of a light-transmitting cover 4071, a cylindrical body 5073, a base holder 4075, and a base 4077. Note that a metal tube 4074 is provided in the cylindrical body 5073, as in the third embodiment. The illumination device 5001 is different from the illumination device 4001 of the third embodiment in the cylindrical body 5073. Therefore, the cylindrical body 5073 will be described below.

[0048] 2.Cylinder The inner diameter of the cylinder 5073 is approximately constant except for the open end on the LED module 4003 side. The outer diameter of the cylinder 4073 increases along the central axis from the open end on the base 4077 side to the open end on the LED module 4003 side, and the overall external shape of the cylinder 5073 is tapered. As shown in Figures 19 and 21, the cylindrical body 5073 has a straight cylindrical section 5731 with constant inner and outer diameters, a tapered cylindrical section 5732 whose inner and outer diameters increase from the end of the straight cylindrical section 5731 on the LED module 4003 side in the central axis direction as it moves away from the straight cylindrical section 5731, an inner flange section 5733 protruding in the central axis direction from the end of the straight cylindrical section 5731 on the base 4077 side, fin sections 5734 provided on the outer periphery of the straight cylindrical section 5731 and the tapered cylindrical section 5732, a mounting section 5735 for mounting the power supply circuit unit 4005, and a fixing section 5736 for fixing the LED module 4003.

[0049] The tapered tube portion 5732 is provided so as to extend from the outer circumferential surface of the end portion of the straight tube portion 5731 , leaving the end surface of the straight tube portion 5731 . As in the third embodiment, the fin portion 5734 is configured by utilizing a plurality of grooves 5737 spaced apart in the circumferential direction. Note that in Figures 18, 20, and 21, the tips of the leads of the grooves 5737 are indicated by arrows in order to distinguish them from the fin portion 5734, the straight cylindrical portion 5731, the tapered cylindrical portion 5732, etc. 18, 20, and 21, the cylinder 5073 includes a metal tube 4074 therein that is in close contact with the inner circumferential surface excluding the end portion on the LED module 4003 side, that is, the inner circumferential surface of the straight cylinder portion 5731. Here, the end surface of the metal tube 4074 on the tapered cylinder portion 5732 side is exposed.

[0050] 19, the cylindrical body 5073 has a plurality of extensions 5738 extending from the inner flange portion 5733 toward the tapered cylindrical portion 5732. There are four extensions 5738 here, and the four extensions 5738 are provided at equal intervals in the circumferential direction. In other words, the cylindrical body 5073 has extensions 5738 that extend parallel to the inner peripheral surface of the straight cylindrical portion 5731 at intervals radially inward from the inner peripheral surface of the straight cylindrical portion 5731. The extensions 5738 here extend parallel to the central axis. The metal tube 4074 is fitted between the extension portion 5738 and the straight tube portion 5731. When describing the state in which the metal tube 4074 is fitted, the extension portion 5738 is provided along the inner peripheral surface of the metal tube 4074 from the inner flange portion 5733 of the tube body 4073, as shown in FIG. The mounting portion 5735 and the fixing portion 5736 are provided on the extending portion 5738. The mounting portion 5735 here is provided on a pair of extending portions 5738 that face each other across the central axis of the cylindrical body 5073, as shown in Fig. 21. The fixing portion 5736 is provided on a pair of extending portions 5738 that face each other across the central axis and that do not have the mounting portion 5735, as shown in Fig. 21.

[0051] 21, the mounting portion 5735 is formed of a groove 5735a provided in the extension portion 5738. The groove 5735a exists halfway to the end of the extension portion 5738 on the base 4077 side. The length of the groove 5735a is slightly shorter than the length of the protruding portion 4053b of the circuit board 4053. The protruding portion 4053b of the circuit board 4053 is inserted into the groove 5735a. The fixing portion 5736 is formed of a screw hole 5736a provided in the end face of the extension portion 5738 on the tapered tube portion 5732 side.

[0052] The cylindrical body 5073 has a cover attachment portion 5739 for attaching the light-transmitting cover 4071 at the end of the tapered cylindrical portion 5732 on the light-transmitting cover 4071 side. The cover attachment portion 5739 is configured with a step 5739a recessed from the inner circumferential side. The cylindrical body 5073 has a base fixing part 5740 for fixing the base 4077 at its end on the base 4077 side. The base fixing part 5740 is configured by a recess provided on the outer circumferential surface of the end of the straight cylindrical part 5731 on the base 4077 side, and this recess is configured by a circumferential groove 5740a extending in the circumferential direction.

[0053] Although the embodiments have been described above, the present invention is not limited to these embodiments, and may be modified as follows, for example. In addition, the embodiments and the modified examples may be combined, or the modified examples may be combined. Furthermore, examples not described in the embodiments and modifications, and design changes within the scope of the present invention are also included in the present invention.

[0054] <Modification> 1. Base material Although the base member 2, 202 according to the first and second embodiments is made of metal, it may be made of a resin material like the cylinder 4073 according to the third embodiment. In this case, it is easier to ensure insulation with the LED board 31, 2033 and the circuit board 41, 2043. The base member only needs to have a structure that supports the portion of the substrate having the metal spring piece to which the fastener fixes the substrate, and the shape of the base member is not particularly limited, and the base member may have functions other than that of mounting the substrate. For example, the base member may be made of a thin metal plate as in the first embodiment, or may be made of metal and have a thick portion (base portion 4021) as in the second embodiment, or may be made of a cylindrical resin material as in the third embodiment. The base member may be made of two or more materials, namely, a metal material and a resin material. For example, as in the third embodiment, the base member may be a cylinder 4073 integrally provided with a metal cylinder 4074, or the base member of the first embodiment may be coated with a resin material (e.g., an insulating resin). The base member may be structured so as to come into contact with the LED board via an insulating sheet or a heat sheet.

[0055] 2. Conductor and conductive spring piece (1) Conductor In the embodiment, the conductor uses metal pins 45, 2045a, 4055a having a circular or square cross section, but for example, a metal pin whose cross-sectional shape changes in the longitudinal direction (e.g., tapered) may also be used, a metal plate whose cross section is rectangular may also be used, or a metal screw (including a tapping screw) may also be used.

[0056] (2) Conductive spring piece The conductive spring pieces are not particularly limited in shape, size, or number as long as they block the through-holes of the substrate in which they are provided, elastically deform as the conductor passes through the through-hole, and maintain contact with the conductor by the restoring force to allow current to flow. However, in the case of a structure in which the conductor is sandwiched from both sides, the conductor can be prevented from falling out. Here, both sides refer to a direction parallel to the surface of the substrate and perpendicular to the insertion direction of the conductor. The amount by which the conductive spring piece blocks the through hole may be an amount that allows the conductive spring piece to reliably contact the conductor when the conductor passes through the through hole, and does not necessarily have to block the entire through hole. Note that "blocking" here refers to the state when viewed from the tip side of the through hole in the insertion direction of the conductor, not the state when viewed from a direction perpendicular to the insertion direction.

[0057] (3) Substrate In the embodiment, the board having the conductive spring piece (metal spring piece) 35, 2035, 4035b is the LED board 31, 2033, 4033, but the conductor may be provided on the LED board and the conductive spring piece may be provided on the circuit board. In the embodiments, the conductive spring piece (metal spring piece) 35, 2035, 4035b was provided on the mounting surface of the LED element 33, 2031, 4031 on the LED substrate 31, 2033, 4033, but for example, in the third and fourth embodiments, the conductive spring piece may be provided on the surface of the LED substrate opposite to the mounting surface of the LED element.

[0058] 3. Fasteners In the first and third embodiments, the screw body 374, 4004 is used to fix the LED board 31, 4033, but for example, a rivet may be used. The fastener fixes the LED board 31, 2033, 4033 including the conductive spring piece (metal spring piece) 35, 2035, 4035b by fastening so as to press it against the base member. From this viewpoint, it is sufficient if the board can be fixed in a pressed state against the base member, and for example, it may be a locking piece that locks the periphery of the LED board 31 in a pressed state. [Explanation of symbols]

[0059] 1 Lighting equipment 2 Base material 3 LED Module 4 Power supply circuit unit 31 LED board 31a Through hole 33 LED elements 35 Metallic spring strip (conductive spring strip) 37 Screw body (fastener) 41 Circuit Board 45 Metal pin (conductor)

Claims

1. an LED module in which an LED element is mounted on an LED substrate; a power supply circuit unit including a plurality of circuit components mounted on a circuit board and configured to supply power to the LED element; a base member having the LED board disposed on a front side and the circuit board disposed on a back side; a plurality of metal pins provided on the circuit board and electrically connecting the LED board and the circuit board; a first through hole provided in the LED substrate and through which the metal pin is inserted; a conductive spring piece that is provided on the LED board, closes the first through hole, and elastically deforms as the metal pin passes through the first through hole; A lighting device comprising: a second through hole for inserting the metal pin is provided in a base portion of the base member; The LED board and the circuit board are vertically disposed and partially overlap each other in the front-back direction. The metal pin is provided at an end of the circuit board on the LED board side, The first through hole is provided in a central portion of the LED substrate, the second through hole is provided in a central portion of the base portion, The LED elements are multiple, The plurality of LED elements are arranged around the first through hole, the metal pin is provided so as to extend from a portion overlapping the circuit board in the front-back direction and pass through the first through hole, The conductive spring piece has a bent portion formed by bending a rectangular metal plate at the center in the longitudinal direction, In the conductive spring piece, a portion from the bent portion to one end in the longitudinal direction is a fixed portion that is fixed to the LED substrate, and a portion from the bent portion to the other end in the longitudinal direction closes the first through hole and elastically deforms in accordance with the insertion of the metal pin, The LED board is fixed to the base portion by a screw body in a state of contact with the base portion, By bringing the LED board and the circuit board closer to each other, the metal pins penetrate the first through-hole and the second through-hole and are electrically connected to the conductive spring piece. Lighting equipment.

2. An insulating box that accommodates at least a part of the metal pin and the circuit board in a state parallel to the front-back direction.

10. The lighting device of claim 1.

3. The insulating box is inserted from the front side of the housing, and the housing accommodates the insulating box in a state parallel to the front-back direction.

3. The lighting device according to claim 2.

4. The base member is The base portion has a plurality of heat dissipation fins extending to a rear side at a peripheral portion thereof except for a central portion thereof, the second through hole is provided in the central portion, The insulating box is provided in the central portion so as to be surrounded by the plurality of heat dissipation fins.

4. The lighting device according to claim 2 or 3.

Images