Illumination device

Abstract

To provide an illumination device having a high waterproof property.SOLUTION: An illumination device includes: a cover having a cylindrical shape, having an end part, and in which a space having an opening at the end part is formed; a light emitting element substrate provided in the space and emitting light; a support body provided in the space, supporting the light emitting element substrate, having a surface parallel with a center axis of the cover and vertical with a direction from an outside of the space toward the space via the end part, and having a screw hole extending from the surface formed in a manner of deviating from the center axis; a side cover covering the end part, having a contact surface vertical with an inclination direction inclined from the direction toward the center axis side and in contact with the surface, and in which a through hole extending from the contact surface is formed; a seal material sandwiched by the end part and the side cover; and a screw inserted into the through hole and engages with the screw hole.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present disclosure relates to a lighting device. [Background technology]

[0002] Patent Document 1 discloses a straight tube LED lamp. In this straight tube LED lamp, a substrate is provided inside a circular tube. A plurality of light emitting diodes are arranged on the substrate. The substrate is disposed on the central axis of the circular tube. Base portions are provided on both ends of the circular tube. The base portions are made waterproof (paragraphs 0038, 0040, and 0042, and FIG. 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Utility Model Registration No. 3187738 Summary of the Invention [Problem to be solved by the invention]

[0004] In the straight tube LED lamp disclosed in Patent Document 1, the base may not be in uniform contact with the end of the circular tube. If the base is not in uniform contact with the end of the circular tube, the base often cannot achieve high waterproofing.

[0005] In view of this problem, an aspect of the present disclosure is to provide a lighting device having high waterproof properties. [Means for solving the problem]

[0006] A lighting device according to one aspect of the present disclosure includes a cover having a cylindrical shape and an end, and in which a space having an opening is formed at the end; a light-emitting element substrate disposed in the space and emitting light; a support disposed in the space, supporting the light-emitting element substrate, having a surface parallel to a central axis of the cover and perpendicular to a direction from outside the space toward the space via the end, and having a screw hole extending from the surface formed offset from the central axis; a side cover covering the end, having a contact surface that is perpendicular to a tilt direction inclined from the direction toward the central axis and contacts the surface, and having a through hole extending from the contact surface; a sealing material sandwiched between the end and the side cover; and a screw inserted into the through hole and engaging with the screw hole. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a perspective view illustrating a schematic view of a lighting device according to a first embodiment. [Diagram 2] FIG. 1 is a perspective view illustrating a schematic view of a lighting device according to a first embodiment. [Diagram 3] FIG. 1 is an exploded perspective view illustrating a lighting device according to a first embodiment. [Figure 4] FIG. 1 is an exploded perspective view illustrating a lighting device according to a first embodiment. [Diagram 5] FIG. 1 is an exploded cross-sectional view illustrating a schematic view of a lighting device according to a first embodiment. [Figure 6] FIG. 1 is a cross-sectional view illustrating a schematic view of a lighting device according to a first embodiment. [Figure 7] 2 is a side view diagrammatically illustrating a cover, an LED substrate, and a support body provided in the lighting device of the first embodiment. FIG. [Figure 8] 1 is a perspective view that diagrammatically illustrates a state in which a side cover provided in a lighting device of a reference example is cut in a cross section away from the central axis in a direction perpendicular to a first direction. FIG. [Figure 9] FIG. 1 is a cross-sectional view illustrating a schematic view of a lighting device according to a reference example. [Figure 10]2 is a perspective view that diagrammatically illustrates a state in which a side cover provided in the lighting device of the first embodiment is cut in a cross section away from the central axis in a direction perpendicular to a first direction. FIG. [Figure 11] 2 is an exploded perspective view illustrating a side cover, a screw, a sealant, an LED board, and a support body that are provided in the lighting device of the first embodiment. FIG. [Figure 12] FIG. 1 is an exploded perspective view illustrating a lighting device according to a first embodiment. [Figure 13] 2 is a perspective view illustrating a side cover, a screw, a sealant, an LED board, and a support body that are provided in the lighting device of the first embodiment. FIG. [Figure 14] 13 is a cross-sectional view illustrating a schematic diagram of a side cover provided in the lighting device according to the second embodiment. FIG. [Figure 15] 13 is a perspective view illustrating a side cover, a screw, a sealant, an LED board, and a support body that are provided in the lighting device of the second embodiment. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the drawings, the same or equivalent elements are denoted by the same reference numerals, and duplicated descriptions will be omitted.

[0009] 1. First embodiment 1.1 Appearance of the lighting device 1 and 2 are perspective views that diagrammatically illustrate the lighting device of the first embodiment.

[0010] The lighting device 1 shown in Figures 1 and 2 is a linear fluorescent light-emitting diode (LED) lamp. Therefore, the lighting device 1 has a round rod shape like a linear fluorescent lamp. However, the light source provided in the lighting device 1 is an LED.

[0011] The lighting device 1 is attached to a lighting fixture. The lighting device 1 converts power supplied from the attached lighting fixture into light and emits the light.

[0012] As shown in FIGS. 1 and 2, the lighting device 1 includes a light-emitting portion 11, a side cover 12, a screw 13, a pin 14, a side cover 16, a screw 17, and a pin 18.

[0013] The light-emitting unit 11 converts the power supplied from the pins 14 and 18 into light and emits the light. The light-emitting unit 11 has a round bar shape. Therefore, the light-emitting unit 11 has an outer peripheral surface 11a. One-sided power supply may be performed in which power is supplied to the light-emitting unit 11 from one of the pins 14 and 18.

[0014] The side covers 12 and 16 respectively cover one end and the other end of the light-emitting unit 11. The side covers 12 and 16 prevent water and the like from entering the light-emitting unit 11.

[0015] The screws 13 and 17 screw the side covers 12 and 16 to one end and the other end of the light emitting unit 11, respectively.

[0016] The pins 14 and 18 are inserted into one socket and the other socket, respectively, provided in a lighting fixture. Power is supplied to the pins 14 and 18 from the one socket and the other socket into which the pins 14 and 18 are inserted. The pins 14 and 18 supply the supplied power to the light-emitting unit 11.

[0017] The other end of the light-emitting unit 11, the side cover 16, the screws 17, and the pins 18 each have a symmetrical structure to the one end of the light-emitting unit 11, the side cover 12, the screws 13, and the pins 14. For this reason, in the following, the structures of one end of the light-emitting unit 11, the side cover 12, the screws 13, and the pins 14 will be described, and a description of the structures of one end of the light-emitting unit 11, the side cover 12, the screws 13, and the pins 14 will be omitted.

[0018] 1.2 Inside the lighting device Fig. 3 and Fig. 4 are exploded perspective views that typically illustrate the lighting device of the first embodiment. Fig. 5 is an exploded cross-sectional view that typically illustrates the lighting device of the first embodiment. Fig. 6 is a cross-sectional view that typically illustrates the lighting device of the first embodiment.

[0019] 3 to 6, the lighting device 1 includes a light-emitting unit 11, a side cover 12, screws 13, pins 14, and a sealant 15. The light-emitting unit 11 includes a cover 21, an LED substrate 22, and a support 23.

[0020] 1.3 Cover The cover 21 has a cylindrical shape. Therefore, the cover 21 has a central axis 21a, and has a radial direction DR, a radial direction DC, and an axial direction DA. The axial direction DA is parallel to the central axis 21a. The cover 21 has an end portion 31. A space 21b is formed in the cover 21. The space 21b has an opening 21c at the end portion 31. The space 21b has a cylindrical shape.

[0021] The cover 21 has an inner peripheral surface 21d and an outer peripheral surface 21e. The inner peripheral surface 21d defines a space 21b of the cover 21 in the radial direction DR. The LED substrate 22 and the support 23 are disposed in the space 21b. The cover 21 has translucency and light diffusibility. As a result, light emitted by the LED substrate 22 is incident on the inner peripheral surface 21d. The cover 21 diffuses the light incident on the inner peripheral surface 21d and emits the diffused light from the outer peripheral surface 21e. The light emitted from the outer peripheral surface 21e is light emitted by the lighting device 1. The cover 21 is made of, for example, a milky white resin.

[0022] The end portion 31 has an end surface 21f. The end surface 21f has a ring shape. The opening 21c of the cover 21 is located on the inside in the radial direction DR of the end surface 21f.

[0023] FIG. 7 is a side view that diagrammatically illustrates a cover, an LED substrate, and a support that are provided in the lighting device of the first embodiment.

[0024] As shown in FIG. 7, the cover 21 includes a cylindrical portion 41 , a first protrusion 42 and a second protrusion 43 .

[0025] The cylindrical portion 41 has a cylindrical shape. Therefore, the cylindrical portion 41 has an inner peripheral surface 41a. The first protrusion 42 and the second protrusion 43 have a shape of an elongated rectangular plate. Therefore, the first protrusion 42 and the second protrusion 43 have a longitudinal direction and a lateral direction. The longitudinal direction is parallel to the axial direction DA. The lateral direction is perpendicular to the axial direction DA. The ends of the lateral direction of the first protrusion 42 and the second protrusion 43 are connected to the inner peripheral surface 41a. As a result, the first protrusion 42 and the second protrusion 43 protrude from the inner peripheral surface 41a. The shapes of the cross sections of the first protrusion 42 and the second protrusion 43 perpendicular to the axial direction DA do not change in the axial direction DA. The first protrusion 42 and the second protrusion 43 are arranged to be shifted from the central axis 21a of the cover 21 in the first direction D1.

[0026] 1.4 LED board The LED board 22 is electrically connected to the pins 14 and 18. Power is supplied to the LED board 22 from the pins 14 and 18. The LED board 22 converts the supplied power into light and emits the light. The LED board 22 generates heat when emitting light.

[0027] As illustrated in FIG. 3 to FIG. 7, the LED board 22 is arranged to be shifted from the central axis 21a of the cover 21 in the first direction D1. The LED board 22 has a rectangular plate shape. Therefore, the LED board 22 has a first main surface 22a and a second main surface 22b. The first main surface 22a and the second main surface 22b are on opposite sides to each other. The first main surface 22a faces the first direction D1. The second main surface 22b faces the second direction D2 opposite to the first direction D1. The LED board 22 emits light from the second main surface 22b. Therefore, the LED board 22 emits light toward the second direction D2. As a result, the light emitted by the LED board 22 spreads in the space 21b of the cover 21. As a result, the light is incident on a wide range of the inner peripheral surface 21d of the cover 21. This allows light to be emitted from a wide range of the outer circumferential surface 21e of the cover 21. The LED substrate 22 has a longitudinal direction and a lateral direction. The longitudinal direction is parallel to the axial direction DA. The lateral direction is perpendicular to the axial direction DA.

[0028] As shown in FIGS. 3 to 7, the LED board 22 includes a substrate 51 and a plurality of LEDs 52 .

[0029] The board 51 is electrically connected to the pins 14 and 18. Power is supplied to the board 51 from the pins 14 and 18. The board 51 generates driving power from the supplied power and supplies the generated driving power to the LEDs 52.

[0030] The LEDs 52 emit light according to the supplied power, which causes the LED board 22 to emit light. The LEDs 52 are mounted on the board 51. The LEDs 52 are arranged in the axial direction DA.

[0031] The LEDs 52 may be replaced with a light emitting element other than the LEDs 52, and the LED substrate 22 may be replaced with a light emitting element substrate other than the LED substrate 22.

[0032] 1.5 Support As shown in FIGS. 3 to 7, the support body 23 includes a rectangular plate-shaped portion 61, a first groove forming portion 62, a second groove forming portion 63, and a screw hole forming portion 64.

[0033] The rectangular plate-shaped portion 61 has a rectangular plate shape. Therefore, the rectangular plate-shaped portion 61 has a first main surface 61a and a second main surface 61b. The first main surface 61a and the second main surface 61b are on opposite sides to each other. The first main surface 61a and the second main surface 61b face a first direction D1 and a second direction D2, respectively. The rectangular plate-shaped portion 61 has a longitudinal direction and a lateral direction. The longitudinal direction is parallel to the axial direction DA. The lateral direction is perpendicular to the axial direction DA.

[0034] The first groove forming portion 62 and the second groove forming portion 63 are connected to one end and the other end of the rectangular plate-shaped portion 61 in the short side direction, respectively.

[0035] The first groove forming portion 62 and the second groove forming portion 63 are formed with a groove 62a and a groove 63a, respectively. The groove 62a and the groove 63a have shapes that fit the first protrusion 42 and the second protrusion 43, respectively. The first protrusion 42 and the second protrusion 43 are engaged with the groove 62a and the groove 63a, respectively. As a result, the support body 23 is supported by the cover 21. The first protrusion 42 and the second protrusion 43 are arranged to be shifted from the central axis 21a of the cover 21 in the first direction D1. Therefore, the groove 62a and the groove 63a that are engaged with the first protrusion 42 and the second protrusion 43 are also arranged to be shifted from the central axis 21a in the first direction D1. Therefore, the support body 23 is arranged to be shifted from the central axis 21a in the first direction D1.

[0036] The shapes of the cross sections perpendicular to the axial direction DA of the groove 62a of the first groove forming portion 62 and the groove 63a of the second groove forming portion 63 do not change in the axial direction DA. As a result, by inserting the axial direction DA ends of the first protrusion 42 and the second protrusion 43 into the axial direction DA ends of the groove 62a and the groove 63a, respectively, and then sliding the support body 23 in the axial direction DA relative to the cover 21, the first protrusion 42 and the second protrusion 43 can be fitted into the groove 62a and the groove 63a, respectively.

[0037] The screw hole forming portion 64 is connected to the first main surface 61 a of the rectangular plate-shaped portion 61 .

[0038] A screw hole 64a is formed in the screw hole forming portion 64. Since the support body 23 is disposed offset in the first direction D1 from the central axis 21a of the cover 21, the screw hole 64a is also formed offset in the first direction D1 from the central axis 21a.

[0039] The support 23 has an end face 23a. The end face 23a is parallel to the central axis 21a of the cover 21 and perpendicular to a direction D extending from the outside of the space 21b of the cover 21 toward the inside of the space 21b of the cover 21 via the end portion 31. The end face 23a is perpendicular to the first main surface 61a and the second main surface 61b of the rectangular plate-shaped portion 61. The screw hole 64a extends from the end face 23a.

[0040] In a state where the support 23 supports the LED substrate 22, the second main surface 61b of the rectangular plate-shaped portion 61 is in surface contact with the first main surface 22a of the LED substrate 22. This allows the support 23 to be thermally coupled to the LED substrate 22. This allows heat released by the LED substrate 22 to be transferred to the support 23. The support 23 is formed of a heat sink. This allows the support 23 to release the transferred heat.

[0041] 1.6 Side covers As shown in FIGS. 3 to 6 , the side cover 12 includes an opposing portion 71, an opposing portion 72, a protruding portion 73, and a groove forming portion 74.

[0042] The facing portion 71 has a cylindrical shape. Therefore, a space 71a is formed in the facing portion 71. The facing portion 71 also has an inner circumferential surface 71b and an outer circumferential surface 71c. The end portion 31 is accommodated in the space 71a. As a result, the inner circumferential surface 71b faces the axial DA end of the outer circumferential surface 21e of the cover 21. The facing portion 71 has an inner diameter that fits the outer diameter of the cover 21. As a result, the inner circumferential surface 71b comes into surface contact with the axial DA end of the outer circumferential surface 21e.

[0043] The facing portion 72 has a disk-like shape. Therefore, the facing portion 72 has a first main surface 72a and a second main surface 72b. The first main surface 72a and the second main surface 72b are on opposite sides to each other. The first main surface 72a and the second main surface 72b face the direction D and the direction opposite to the direction D, respectively. The facing portion 72 is connected to the axial direction DA end of the facing portion 71. As a result, the first main surface 72a faces the end surface 21f and the opening 21c of the cover 21.

[0044] The inner surface 71b of the opposing portion 71 faces the axial DA end of the outer surface 21e of the cover 21, and the first main surface 72a of the opposing portion 72 faces the end surface 21f and the opening 21c of the cover 21, so that the side cover 12 covers the end 31.

[0045] The protruding portion 73 has a cylindrical shape. An axial direction DA end of the protruding portion 73 is connected to the first main surface 72a of the opposing portion 72. The protruding portion 73 has a tip 73a. The tip 73a abuts against the end surface 23a of the support body 23. Therefore, the tip 73a has a contact surface 73c that contacts the end surface 23a.

[0046] A through hole 73b is formed in the protruding portion 73. The through hole 73b extends from the contact surface 73c of the protruding portion 73 in the direction opposite to the direction D to reach the second main surface 72b of the facing portion 72. Therefore, the through hole 73b has an opening 73d in the second main surface 72b. The through hole 73b is disposed coaxially with the screw hole 64a of the screw hole forming portion 64.

[0047] The second main surface 72b of the facing portion 72 has an abutment surface 72c that abuts against the seat surface 81a of the head 81 of the screw 13. The abutment surface 72c exists along the outer periphery of the opening 73d of the protruding portion 73. The abutment surface 72c is perpendicular to the direction D.

[0048] The groove forming portion 74 has a cylindrical shape. Therefore, the groove forming portion 74 has an outer peripheral surface 74a and an inner peripheral surface 74b. The axial DA end of the groove forming portion 74 is connected to the first main surface 72a of the facing portion 72. Therefore, the groove forming portion 74 protrudes in the direction D from the first main surface 72a. The groove forming portion 74 has an outer diameter smaller than the inner diameter of the cover 21. Therefore, the outer peripheral surface 74a of the groove forming portion 74, the axial DA end of the inner peripheral surface 21d of the cover 21, and the edge of the first main surface 72a of the facing portion 72 define the groove 12a. The groove 12a has a constant distance from the central axis 21a of the cover 21 over the entire circumference.

[0049] 1.7 Sealing materials The seal material 15 is an O-ring. Therefore, the seal material 15 is made of an elastic body and has an annular shape. The elastic body is, for example, rubber. As shown in FIG. 6, the seal material 15 is accommodated in the groove 12a of the side cover 12. The seal material 15 contacts the outer peripheral surface 74a of the groove forming portion 74, the axial DA end of the inner peripheral surface 21d of the cover 21, and the edge of the first main surface 72a of the facing portion 72. The seal material 15 has a constant distance from the central axis 21a of the cover 21 over the entire circumference.

[0050] The groove 12a of the side cover 12 also accommodates the end portion 31. As a result, the sealant 15 is sandwiched between the end portion 31 and the side cover 12. The sealant 15 is crushed in the axial direction DA by the end portion 31 and the side cover 12. As a result, the sealant 15 liquid-tightly seals the gap between the end portion 31 and the side cover 12. As a result, the sealant 15 prevents water and the like from entering the space 21b of the cover 21.

[0051] The seal material 15 may be a seal material other than an O-ring made of an elastic body and having a circular shape. For example, the seal material 15 may be a metal packing made of metal and having a circular shape.

[0052] 1.8 Screws As shown in FIGS. 3 to 6, the screw 13 includes a head portion 81 and a shank portion 82 .

[0053] The head portion 81 has a seat surface 81a. The seat surface 81a abuts against the abutment surface 72c of the facing portion 72.

[0054] The shaft portion 82 is inserted into the through hole 73b of the protruding portion 73. The shaft portion 82 is screwed into the screw hole 64a of the screw hole forming portion 64.

[0055] As a result, the side cover 12 is screwed to the support body 23. As a result, the side cover 12 is fixed to the support body 23. Also, the seat surface 81a of the head portion 81 presses the side cover 12 toward the end portion 31. As a result, the side cover 12 presses the sealing material 15 toward the end portion 31. As a result, the sealing material 15 is crushed in the axial direction DA by the end portion 31 and the side cover 12.

[0056] The screw holes 64a of the screw hole forming portion 64 are formed offset in the first direction D1 from the central axis 21a of the cover 21, so that the screws 13 screwed into the screw holes 64a are arranged offset in the first direction D1 from the central axis 21a. Therefore, the sealing material 15 having a constant distance from the central axis 21a over the entire circumference has a close distance portion 91 close to the screws 13 and the screw holes 64a and a far distance portion 92 far from the screws 13 and the screw holes 64a.

[0057] 1.9 pin The pin 14 passes through the facing portion 72. The pin 14 is parallel to the axial direction DA. Therefore, one axial direction DA end of the pin 14 is exposed to the outside of the lighting device 1. The other axial direction DA end of the pin 14 is disposed in the space 21b of the cover 21.

[0058] 1.10 Uniform squeezing of sealant Fig. 8 is a perspective view showing a cross section of a side cover provided in a lighting device of a reference example, the cross section being away from the central axis in a direction perpendicular to the first direction. Fig. 9 is a cross-sectional view showing the lighting device of the reference example.

[0059] In the lighting device of the reference example, as shown in FIG. 8, the contact surface 73c of the protrusion 73 is perpendicular to the direction D. In this case, as shown in FIG. 9, when the side cover 12 is screwed to the support 23 by the screw 13, the side cover 12 tilts in one direction DP. Therefore, the part 101 that crushes the near part 91 moves in a direction approaching the seal material 15, and the part 102 that crushes the far part 92 moves in a direction away from the seal material 15. Therefore, the near part 91 can be sufficiently crushed, but the far part 92 cannot be sufficiently crushed. Therefore, a gap is formed near the far part 92, and water or the like enters the space 21b of the cover 21 through the formed gap. Therefore, the lighting device 1 cannot be provided with sufficient waterproofing.

[0060] Fig. 10 is a perspective view showing a cross section of a side cover provided in the lighting device of the first embodiment, the cross section being spaced apart from the central axis in a direction perpendicular to the first direction. Fig. 11 is an exploded perspective view showing a side cover, screws, a sealant, an LED substrate, and a support body provided in the lighting device of the first embodiment.

[0061] In the lighting device 1 of the first embodiment, the contact surface 73c of the protrusion 73 is perpendicular to the first inclination direction DT1 inclined from the direction D toward the central axis 21a of the cover 21. That is, the contact surface 73c is perpendicular to the first inclination direction DT1 inclined from the direction D toward the second direction D2. Therefore, as shown in FIG. 11, when the side cover 12 is screwed to the support 23 by the screw 13 without the end 31 being accommodated in the groove 12a of the side cover 12, the side cover 12 is inclined in the other direction DQ opposite to the one direction DP described above. Therefore, the portion 101 that crushes the near distance portion 91 moves in a direction away from the seal material 15, and the portion 102 that crushes the far distance portion 92 moves in a direction approaching the seal material 15. Therefore, when the end 31 is accommodated in the groove 12a and the side cover 12 is screwed to the support 23 by the screw 13, as shown in FIG. 6, the force tilting the side cover 12 in one direction DP is canceled by the force tilting the side cover 12 in the other direction DQ. Therefore, the side cover 12 is suppressed from tilting in one direction DP. Therefore, the portion 101 that crushes the near distance portion 91 is suppressed from moving away from the seal material 15, and the portion 102 that crushes the far distance portion 92 is suppressed from approaching the seal material 15. As a result, both the near distance portion 91 and the far distance portion 92 can be sufficiently crushed. As a result, the end 31 and the side cover 12 can uniformly crush the seal material 15 all around. As a result, the formation of a gap between the side cover 12 and the end 31 is suppressed. As a result, it is possible to provide a lighting device 1 having high waterproofing. Moreover, the assembly of the lighting device 1 can be performed in the same manner as the assembly of the lighting device of the reference example. Therefore, the lighting device 1 can be easily assembled.

[0062] When the screw 13 and the screw hole 64a of the screw hole forming portion 64 are arranged on the central axis 21a of the cover 21, the groove 12a of the side cover 12 and the sealant 15 have a constant distance from the central axis 21a over the entire circumference. Therefore, the sealant 15 can be crushed evenly over the entire circumference. However, when the screw 13 and the screw hole 64a are arranged on the central axis 21a, the LED board 22 cannot be largely shifted in the first direction D1 from the central axis 21a. Therefore, light cannot be emitted from a wide range of the outer peripheral surface 21e of the cover 21.

[0063] 2. Second embodiment The following describes the differences between the second embodiment and the first embodiment. For points that are not described, the second embodiment employs the same configuration as that employed in the first embodiment.

[0064] Fig. 12 is an exploded perspective view that typically illustrates the lighting device of the first embodiment. Fig. 13 is a perspective view that typically illustrates a side cover, a screw, a sealant, an LED substrate, and a support that are provided in the lighting device of the first embodiment.

[0065] In the first embodiment, the contact surface 73c of the protruding portion 73 is perpendicular to the first inclination direction DT1. In this case, as shown in FIG. 12, when the side cover 12 is screwed to the support 23 by the screw 13 without the end portion 31 being accommodated in the groove 12a of the side cover 12, the side cover 12 is inclined in the other direction DQ. Therefore, when the seat surface 81a of the head portion 81 abuts against the abutment surface 72c of the facing portion 72, the screw 13 may be inclined in the other direction DQ. Alternatively, as shown in FIG. 13, when the screw 13 is not inclined in the other direction DQ, the seat surface 81a may be slightly separated from the abutment surface 72c. Therefore, a gap 111 may be formed between the seat surface 81a and the abutment surface 72c.

[0066] Fig. 14 is a cross-sectional view that typically illustrates a side cover provided in the lighting device of the second embodiment. Fig. 15 is a perspective view that typically illustrates a side cover, a screw, a sealant, an LED substrate, and a support that are provided in the lighting device of the second embodiment.

[0067] In the second embodiment, as shown in Fig. 14, the contact surface 72c of the facing portion 72 is perpendicular to a second inclination direction DT2 inclined from the direction D toward the central axis 21a of the cover 21. In this case, as shown in Fig. 15, the screw 13 does not incline in the other direction DQ, and the seat surface 81a of the head 81 does not move away from the contact surface 72c. Therefore, no gap is formed between the seat surface 81a and the contact surface 72c. The second inclination direction DT2 is the same direction as the first inclination direction DT1, but may be slightly different from the first inclination direction DT1.

[0068] The present disclosure is not limited to the above-described embodiments, and may be replaced with a configuration that is substantially the same as the configuration shown in the above-described embodiments, a configuration that has the same action and effect, or a configuration that can achieve the same purpose. [Explanation of symbols]

[0069] 1 lighting device, 11 light emitting portion, 11a outer peripheral surface, 12 side cover, 12a groove, 13 screw, 14 pin, 15 seal material, 16 side cover, 17 screw, 18 pin, 21 cover, 21a central axis, 21b space, 21c opening, 21d inner peripheral surface, 21e outer peripheral surface, 21f end surface, 22 LED substrate, 22a first main surface, 22b second main surface, 23 support, 23a end surface, 31 end portion, 41 cylindrical portion, 41a inner peripheral surface, 42 first protrusion, 43 second protrusion, 51 substrate, 52 LED, 61 rectangular plate portion, 61a first main surface, 61b second main surface, 62 first groove forming portion, 62a groove, 62b groove, 63 second groove forming portion, 63a Groove, 63b groove, 64 screw hole forming portion, 64a screw hole, 71 opposing portion, 71a space, 71b inner peripheral surface, 71c outer peripheral surface, 72 opposing portion, 72a first main surface, 72b second main surface, 72c abutment surface, 73 protrusion, 73a tip, 73b through hole, 73c contact surface, 73d opening, 74 groove forming portion, 74a outer peripheral surface, 74b inner peripheral surface, 81 head, 81a seat surface, 82 shaft portion, 91 near portion, 92 far portion, 101 portion, 102 portion, D direction, D1 first direction, D2 second direction, DP one direction, DQ other direction, DT1 first inclination direction, DT2 second inclination direction, DR radial direction, DC radial direction, DA axial direction.

Claims

1. A cover having a cylindrical shape, an end portion, and a space having an opening at the end portion; a light emitting element substrate that is disposed in the space and emits light; a support disposed in the space, supporting the light-emitting element substrate, having a surface that is parallel to a central axis of the cover and perpendicular to a direction from outside the space through the end portion to inside the space, and having a screw hole extending from the surface formed so as to be offset from the central axis; a side cover covering the end portion, the side cover having a contact surface that is perpendicular to the inclination direction inclined from the direction toward the central axis and that contacts the surface, the side cover having a through hole extending from the contact surface; a seal material sandwiched between the end portion and the side cover; a screw inserted into the through hole and screwed into the screw hole; A lighting device comprising:

2. The end portion has an end surface having a ring shape, The opening is located radially inward of the end surface, the side cover includes a facing portion facing the end surface and the opening, and a protruding portion protruding in the direction from the facing portion and having a tip, The contact surface is at the tip.

10. The lighting device of claim 1.

3. The light emitting element substrate is disposed so as to be shifted from the central axis.

3. The lighting device according to claim 1 or 2.

4. The light emitting element substrate is disposed so as to be shifted in a first direction from the central axis, and emits the light in a second direction opposite to the first direction.

4. The lighting device according to claim 3.

5. the tilt direction is a first tilt direction, The screw has a bearing surface, The side cover has an abutment surface that abuts against the seat surface and is perpendicular to a second inclination direction that is inclined from the direction toward the central axis.

3. The lighting device according to claim 1 or 2.

6. The light emitting element substrate generates heat, The support is a heat sink that dissipates the heat.

3. The lighting device according to claim 1 or 2.

7. The sealing material is an O-ring.

3. The lighting device according to claim 1 or 2.

8. The sealing material is crushed uniformly over the entire circumference by the end portion and the side cover.

3. The lighting device according to claim 1 or 2.

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