JP6920675B2 - Lighting device - Google Patents

Description

The present disclosure relates to a lighting device.

Patent Document 1 describes a holder fixed inside the main body of an apparatus and holding a light emitting module, a translucent cover that engages with the holder and covers the light emitting module and the holder, and a packing attached to the cover. A ceiling-embedded lighting device is disclosed. Patent Document 1 describes that by closing the gap between the inner surface of the apparatus main body and the cover with packing, it is possible to prevent moisture and foreign matter from entering the cover.

Japanese Patent No. 6059023

By the way, in the ceiling-embedded lighting device, an insertion hole for passing a lead wire for supplying electric power to a light emitting module provided inside the device main body is formed in the device main body. The lead wire insertion hole is a small hole that opens in a closed ceiling space, but insects, dust, moisture, corrosive gas, and the like can also enter the cover through such an insertion hole. If these invade the cover and act on the light emitting module, deterioration of the light emitting module may be accelerated, and defects due to tracking may occur.

The lighting device according to one aspect of the present disclosure includes a ceiling-shaped device main body having an opening at one end in the axial direction and a top plate portion formed at the other end in the axial direction, and a light emitting module provided inside the device main body. A holder fixed inside the apparatus main body and holding the light emitting module, a translucent cover that engages with the holder and covers the light emitting module and the holder, and a lead wire connected to the light emitting module. The apparatus main body is provided with an insertion hole for the lead wire formed in the top plate portion and an annular groove formed so as to surround the insertion hole on a surface facing the outside of the top plate portion. A top plate for sandwiching the sealing material provided in the annular groove and the top plate portion together with the sealing material, and sealing the space on the top plate portion surrounded by the sealing material. It is characterized by further providing.

According to the lighting device which is one aspect of the present disclosure, it is possible to prevent insects, dust, moisture, corrosive gas and the like from entering the cover through the insertion hole of the lead wire. Therefore, according to the lighting device which is one aspect of the present disclosure, it is possible to more reliably suppress the occurrence of defects such as deterioration of the light emitting module and defects due to tracking.

It is a perspective view which looked at the lighting apparatus which is an example of Embodiment from above. It is an exploded perspective view which looked at the lighting apparatus which is an example of Embodiment from above. It is an exploded perspective view which looked at the lighting apparatus which is an example of Embodiment from below. FIG. 5 is a cross-sectional view taken along the line AA in FIG. It is a perspective view which shows the holder, the translucent cover, and the inner packing which are an example of embodiment. It is a perspective view which looked at the lighting apparatus which is an example of Embodiment from above, and shows the state which removed the top plate. It is a figure which shows the lead wire seal part of the lighting apparatus which is another example of an embodiment.

Hereinafter, an example of an embodiment of the lighting device according to the present disclosure will be described in detail with reference to the drawings. Since the drawings referred to in the description of the embodiment are schematically described, the dimensional ratio of each component should be determined in consideration of the following description. It is assumed from the beginning that the components of the plurality of embodiments described below are selectively combined.

FIG. 1 is a perspective view of the lighting device 10 as an example of the embodiment as viewed from above. FIG. 2 is an exploded perspective view of the illuminating device 10 viewed from above, and FIG. 3 is an exploded perspective view of the illuminating device 10 viewed from below. As illustrated in FIGS. 1 to 3, the lighting device 10 has a celestial tubular device main body 11 having an opening at one end in the axial direction and a top plate portion 14 formed at the other end in the axial direction, and the device main body 11. It includes a light emitting module 20 provided inside. The lighting device 10 is a ceiling-embedded lighting device that is inserted into a ceiling-embedded hole with the opening of the device main body 11 facing vertically downward, and is generally called a downlight. In the present specification, for convenience of explanation, the vertically upper side "upper" and the vertically lower side of the lighting device 10 are referred to as "lower" in a state where the lighting device 10 is mounted on the ceiling.

The lighting device 10 is mounted on a horizontal ceiling, for example, in a living room, but it can also be mounted on a ceiling that is inclined with respect to the horizontal direction and the vertical direction. Further, the lighting device 10 can be attached to the ceiling of a corridor of a house, an entrance, a public facility such as a library, a commercial facility such as a department store, an office, a store, a factory, or the like. The ceiling to which the lighting device 10 is attached may be a portion that divides the upper part of the building space, and may be, for example, a ceiling such as an entrance porch or a terrace. Illumination apparatus 10 may be installed in an atmosphere containing corrosive gases such as hydrogen sulfide (H ₂ S).

The lighting device 10 includes a holder 30 fixed inside the device main body 11 and holding the light emitting module 20, and a translucent cover 40 that engages with the holder 30 and covers the light emitting module 20 and the holder 30. Further, the lighting device 10 includes a lead wire 24 connected to the light emitting module 20 and a lighting device (not shown) that supplies electric power to the light emitting module 20 via the lead wire 24. The lead wire 24 is a wiring for connecting a lighting device provided outside the device main body 11 and a light emitting module 20 provided inside the device main body 11. The apparatus main body 11 has an insertion hole 15 for a lead wire 24 formed in the top plate portion 14.

As will be described in detail later, the lighting device 10 seals together with the annular groove 50 formed on the outer surface 14a facing the outside of the top plate portion 14, the sealing material provided in the annular groove 50, and the top plate portion 14. A top plate 60 that sandwiches the material and seals the space P on the top plate portion 14 surrounded by the sealing material is provided. The annular groove 50 is formed so as to surround the insertion hole 15, and the insertion hole 15 is sealed from the outside of the apparatus main body 11 by a sealing material provided in the annular groove 50. Further, the lighting device 10 preferably includes an inner packing 65 that seals a gap between the inner surface of the device main body 11 and the cover 40.

The apparatus main body 11 is a tubular body having one end in the axial direction (hereinafter, may be referred to as “lower end”) open, and the tubular wall portion 13 and the other end in the axial direction (hereinafter, may be referred to as “upper end”). It has a top plate portion 14 formed on the surface. The apparatus main body 11 is a cylindrical member having a substantially circular cross section perpendicular to the axial direction, and has a divergent shape whose diameter increases as it approaches the opening at the lower end. Further, an annular flange portion 12 is formed on the peripheral edge of the opening of the apparatus main body 11. The flange portion 12 is formed so as to project radially outward at the peripheral edge of the opening of the device main body 11, and is arranged along the ceiling surface in a state where the upper portion of the device main body 11 is inserted into the ceiling space from the embedding hole.

The apparatus main body 11 is manufactured by pressing, spinning, or die-casting a metal material containing aluminum, iron, or the like as a main component, and is preferably manufactured by die-casting. However, the apparatus main body 11 may be made of a resin material. A plurality of heat radiation fins may be provided on the outside of the device main body 11. The device main body 11 is not limited to a cylindrical shape, and may be a topped cylinder-shaped member having a rectangular cross section perpendicular to the axial direction.

The tubular wall portion 13 is formed in the upper part of the apparatus main body 11 along the axial direction, and has a shape inclined so as to gradually spread outward in the radial direction from the central portion in the vertical direction toward the lower end. The tubular wall portion 13 may be curved. The inner surface of the tubular wall portion 13 facing the inside of the apparatus main body 11 serves as a reflection surface of light emitted from the light emitting module 20. A metal layer may be formed on the inner surface of the tubular wall portion 13 by vapor deposition, plating, sputtering or the like in order to increase the reflectance of light, or may be mirror-finished by polishing or the like. Further, a white coating film containing a white pigment may be formed on the inner surface of the cylinder wall portion 13.

As described above, the top plate portion 14 is formed at the upper end of the device main body 11 and closes the upper end of the device main body 11. The top plate portion 14 has, for example, a substantially disk shape, and is formed substantially flat along the radial direction of the apparatus main body 11 except for the peripheral portion. The insertion hole 15 for passing the lead wire 24 is formed in the top plate portion 14 as described above. In the example shown in FIG. 2, one circular insertion hole 15 is formed at the end of the top plate portion 14.

In this embodiment, the holder 30 is screwed to the top plate portion 14. The holder 30 is fixed from the outside of the top plate portion 14 using screws 38 (holder fixing screws). Therefore, the top plate portion 14 is formed with a through hole 16 through which the screw 38 is inserted. Further, the top plate portion 14 is formed with a pin hole 18 into which a positioning pin 37, which will be described later, of the holder 30 is inserted.

As described above, the lighting device 10 is provided with an annular groove 50 formed on the top plate portion 14 of the apparatus main body 11, a top plate 60 covering the top plate portion 14, and a top plate 60 provided in the annular groove 50. It is provided with a sealing material interposed between the device and the top plate portion 14 of the apparatus main body 11. The annular groove 50 is preferably formed between two peripheral walls 51 erected on the outer surface 14a along the peripheral edge of the top plate portion 14.

The lighting device 10 includes a ring-shaped outer packing 55 that is fitted into the annular groove 50 as the sealing material. The apparatus main body 11 may have a recess 52 that forms an opening for passing the lead wire 24 between the top plate 60 and the top plate portion 14. Further, the outer packing 55 may have a lead wire sealing portion 56 that closes a gap between the lead wire 24 and the recess 52.

The top plate 60 is arranged above the top plate portion 14 so as to face the outer surface 14a of the top plate portion 14 so as to cover the entire range surrounded by the annular groove 50 (outer packing 55). The top plate 60 has a base portion 61 and a claw portion 62, and may be fixed to the upper end of a fixing portion 53 provided around the top plate portion 14 by using a screw 68 (top plate fixing screw). preferable. The screw 68 is attached to the through hole 63 formed in the base portion 61. The annular groove 50, the outer packing 55, the top plate 60, and the like that form the closed structure of the space P (see FIG. 4) will be described later.

The lighting device 10 includes a mounting spring 70 fixed to a support portion 71 formed on the outside of the device main body 11. The support portion 71 is formed on the outside of the apparatus main body 11 so as to straddle the flange portion 12 and the cylinder wall portion 13. The support portions 71 are formed at two locations side by side in the radial direction of the apparatus main body 11, and have a shape into which the end portion of the mounting spring 70 can be inserted. The two mounting springs 70 fixed to each support portion 71 have a leaf spring structure and extend in the horizontal direction. The lighting device 10 is fixed to the ceiling by the mounting spring 70 contacting the periphery of the embedded hole in the ceiling in the space behind the ceiling. In addition, three or more mounting springs 70 may be provided.

The light emitting module 20 is held by the holder 30 and is provided inside the apparatus main body 11. The light emitting module 20 has, for example, a COB (Chip on Board) type light source unit 21 mounted on a rectangular substrate 22. The light emitting element constituting the light source unit 21 is, for example, a semiconductor light emitting element, and among them, an LED (Light Emitting Diode) is preferable. The light emitting element is sealed with, for example, a sealing layer containing a phosphor. The light source unit 21 converts a part of the blue light of the light emitting element into light having a longer wavelength by the phosphor, and emits white light by mixing the color with the remaining part of the blue light.

A lead wire 24 for supplying electric power to the light source unit 21 is connected to the light emitting module 20. A plurality of lead wires 24 are connected to, for example, the light emitting module 20. Then, the plurality of lead wires 24 are pulled out from one insertion hole 15 to the outside of the apparatus main body 11. The light emitting module 20 may be provided with a heat radiating plate 23 that diffuses the heat of the light source unit 21. The heat radiating plate 23 is arranged on the upper surface of the substrate 22 and is interposed between the substrate 22 and the inner surface 14b (see FIG. 4) of the top plate portion 14.

In the light emitting module 20, silver or a silver alloy may be used as a metal constituting a reflecting portion, a contact portion, or the like. Since silver is easily oxidized by the action of hydrogen sulfide to generate black silver oxide, when the lighting device 10 is used in an atmosphere in which hydrogen sulfide is present, for example, the reflective portion is blackened and the luminous flux is reduced, resulting in a decrease in product life. Is expected to be shorter. Since the lighting device 10 is provided with the outer packing 55 and has excellent airtightness in the accommodation space S (see FIG. 4) of the light emitting module 20, deterioration of the light emitting module 20 due to such corrosive gas can be suppressed.

The holder 30 is fixed to the top plate portion 14 inside the apparatus main body 11 and holds the light emitting module 20. The holder 30 is generally made of a resin material. The holder 30 is inserted into the upper part of the apparatus main body 11 having a substantially constant diameter, and is fixed to the inner surface 14b of the top plate portion 14 by using a screw 38 inserted into the through hole 16 from the outside of the top plate portion 14. The outer diameter of the holder 30 is smaller than the inner diameter of the upper part of the device main body 11, and there is a gap between the holder 30 and the inner surface of the device main body 11 into which the cover 40 can be inserted.

The holder 30 has a substantially ring-shaped bottom plate 31 having a window hole 34 formed in the center, and a peripheral wall 32 erected on the outer peripheral portion of the bottom plate 31 and formed in a cylindrical shape. The light emitting module 20 is arranged in the holder 30 with the surface of the substrate 22 on which the light source unit 21 mounted is facing downward so that light is emitted through the window hole 34 of the bottom plate 31. The bottom plate 31 is inclined so as to gradually approach the top plate portion 14 side from the outer peripheral portion toward the peripheral edge of the window hole 34. A protrusion 35 that functions as an engaging portion with the cover 40 is formed on the outer surface of the peripheral wall 32.

The cover 40 is a milky white resin translucent member containing, for example, a filler or void for light diffusion. Alternatively, the cover 40 may be a transparent member and may have a lens function of forming light on an incident surface and an emitted surface. The cover 40 has a function of covering and protecting the light emitting module 20 held in the holder 30 and transmitting or diffusing the light emitted from the light emitting module 20.

The cover 40 has a substantially disk-shaped bottom plate 41 and a peripheral wall 42 erected on the outer peripheral portion of the bottom plate 41, and has a bottomed cylindrical shape capable of accommodating the holder 30. A recess 45 that functions as an engaging portion with the holder 30 is formed on the inner surface of the peripheral wall 42, and the cover 40 is fixed to the holder 30 by fitting the recess 45 and the protrusion 35 of the holder 30. The inner diameter of the cover 40 is larger than the outer diameter of the holder 30, and the entire holder 30 that holds the light emitting module 20 is housed inside. On the other hand, the outer diameter of the cover 40 is smaller than the inner diameter of the upper part of the device main body 11, and the cover 40 is inserted between the device main body 11 and the holder 30.

In the present embodiment, the cover 40 is attached to the inside of the apparatus main body 11 so that the upper end of the holder 30 is covered with the cover 40 and the holder 30 is completely housed in the cover 40. Then, in the lighting device 10, a storage space S (see FIG. 4) of the light emitting module 20 surrounded by the inner surface 14b of the top plate portion 14 and the cover 40 is formed. The light emitting module 20 and the holder 30 are arranged in the accommodation space S, and the lead wire 24 is drawn through the insertion hole 15 of the top plate portion 14.

Hereinafter, the closed structure of the space P and the accommodation space S will be described in more detail with reference to FIGS. 4 to 6. FIG. 4 is a cross-sectional view taken along the line AA in FIG. FIG. 5 is a perspective view showing the holder 30, the translucent cover 40, and the inner packing 65. FIG. 6 is a perspective view of the lighting device 10 as viewed from above, showing a state in which the top plate 60 is removed.

As illustrated in FIGS. 4 and 5, the lighting device 10 preferably includes an outer packing 55 provided on the top plate portion 14, and further includes an inner packing 65 provided inside the device main body 11. The inner packing 65 is made of, for example, elastic rubber, an elastomer, or the like. Generally, there is a small gap between the inner surface 14b of the top plate portion 14 and the upper end of the cover 40. Therefore, by interposing the inner packing 65 between the inner surface 14b and the upper end of the cover 40, such a gap is provided. Can be closed to improve the airtightness of the accommodation space S.

Here, the configuration of the holder 30 will be described. As described above, the holder 30 holds the light emitting module 20 in a state where the surface of the substrate 22 on which the light source unit 21 is mounted faces downward so that the light of the light emitting module 20 is emitted through the window hole 34 of the bottom plate 31. do. The holder 30 has a holding portion 33 formed in the central portion of the bottom plate 31. The holding portion 33 is formed so as to surround the window hole 34, supports the lower surface of the substrate 22, and holds the four corners and the like of the substrate 22.

The holder 30 has a boss portion 36 into which a screw 38 is screwed. The boss portion 36 is provided on the bottom plate 31 radially outside the holding portion 33. In the present embodiment, two substantially columnar boss portions 36 having screw holes formed in the center in the radial direction are erected on the bottom plate 31. The holder 30 is pulled up by screwing the screw 38 into the boss portion 36 and fixed to the top plate portion 14.

Further, the holder 30 has a positioning pin 37 to be inserted into the pin hole 18 formed in the top plate portion 14. By inserting the positioning pin 37 into the pin hole 18, the top plate portion 14 and the holder 30 are positioned. The positioning pin 37 is formed on a substantially cylindrical pedestal portion 39 erected on the bottom plate 31. Two boss portions 36 and two positioning pins 37 are formed side by side in the circumferential direction of the bottom plate 31.

In the present embodiment, the ring-shaped inner packing 65 is arranged along the upper end of the peripheral wall 32 of the holder 30 and the upper end of the peripheral wall 42 of the cover 40 to close the gap between the inner surface 14b of the top plate portion 14 and the cover 40. The airtightness of the accommodation space S is improved. The inner packing may be attached to the peripheral wall 42 of the cover 40 to seal the gap between the inner surface of the device main body 11 and the outer surface of the peripheral wall 42.

As illustrated in FIGS. 4 and 6, the apparatus main body 11 sandwiches the ring-shaped outer packing 55 fitted in the annular groove 50 of the apparatus main body 11 and the outer packing 55 together with the top plate portion 14, and the outer packing 55 A top plate 60 that seals the space P on the top plate portion 14 surrounded by the above is provided. As described above, the annular groove 50 is formed on the outer surface 14a of the top plate portion 14 so as to surround the insertion hole 15 of the lead wire 24 formed in the top plate portion 14.

In the lighting device 10, the top plate 60 is fixed to the device main body 11 in a state of pressing the outer packing 55, and is surrounded by the outer surface 14a of the top plate portion 14, the annular outer packing 55, and the top plate 60. Further, the space P formed above the top plate portion 14 is sealed. Therefore, it is possible to prevent insects, dust, moisture, corrosive gas, etc. from entering the inside of the cover 40 (inside the accommodation space S) through the insertion hole 15.

The top plate portion 14 is formed with a through hole 16 through which the screw 38 is inserted and a pin hole 18 into which the positioning pin 37 is inserted as a through hole communicating with the accommodation space S other than the insertion hole 15. Therefore, the annular groove 50 is preferably formed so as to surround the insertion hole 15, the through hole 16, and the pin hole 18. That is, the insertion hole 15, the through hole 16, and the pin hole 18 are preferably formed in a range surrounded by the annular groove 50 in the top plate portion 14. Since the inside of the annular groove 50 is sealed by the outer packing 55 and the top plate 60, each through hole can be sealed by locating each through hole inside the annular groove 50.

The annular groove 50 is formed between two peripheral walls 51 erected on the outer surface 14a along the peripheral edge of the top plate portion 14. The peripheral walls 51 are formed at substantially the same height at intervals in the radial direction of the device main body 11. For example, by changing the height of each peripheral wall 51, the distance between the outer surface 14a and the top plate 60, that is, the height of the space P (length in the vertical direction) can be adjusted. The height of the space P is set so that the head of the screw 38 and the positioning pin 37 existing in the space P do not interfere with the top plate 60. Further, the width of the annular groove 50 can be adjusted by changing the distance between the peripheral walls 51. The distance between the peripheral walls 51 is, for example, substantially constant, but in order to improve the detachability of the outer packing 55, a protrusion protruding into the annular groove 50 may be provided in a part of the peripheral wall 51.

As described above, the outer packing 55 is a ring-shaped packing that is fitted into the annular groove 50. Like the inner packing 65, the outer packing 55 is preferably made of elastic rubber, an elastomer, or the like. The outer packing 55 is provided in the annular groove 50 with a part protruding from the upper end of the peripheral wall 51 forming the annular groove 50. In other words, the height of the peripheral wall 51 is formed to be slightly lower than the thickness of the outer packing 55. By providing the outer packing 55 in this way, the outer packing 55 is crushed by the top plate 60, and good airtightness of the space P is ensured.

The apparatus main body 11 has a recess 52 formed in a part of the peripheral edge of the top plate portion 14. The recess 52 forms an opening through which the lead wire 24 can be inserted between the outer surface 14a of the top plate portion 14 and the top plate 60. The recess 52 is formed by eliminating a part of the peripheral wall 51 and denting a part of the outer surface 14a, for example. An opening through which the lead wire 24 can be inserted may be formed in the top plate 60 to seal the gap between the opening and the lead wire 24, but in consideration of the routing of the lead wire 24, the airtightness of the space P, and the like. It is preferable that the apparatus main body 11 is provided with the recess 52 and the lead wire 24 is pulled out in the radial direction.

The sealing material has a lead wire sealing portion 56 that closes a gap between the lead wire 24 and the opening formed by the recess 52. By providing the lead wire sealing portion 56, the lead wire 24 can be pulled out in the radial direction of the apparatus main body 11 while ensuring the airtightness of the space P. In the present embodiment, the lead wire sealing portion 56 having a through hole through which the lead wire 24 can be inserted is integrated with the outer packing 55. The outer packing 55 has, for example, a structure in which a part thereof is thickly formed and a through hole is formed in the thickened portion. The number of through holes of the lead wire seal portion 56 is formed in the same number as the number of lead wires 24, and one lead wire 24 is passed through each through hole.

FIG. 7 is a diagram showing another example of the lead wire sealing portion 56. As illustrated in FIG. 7, the lead wire sealing portion 56 has the same number of grooves as the number of lead wires 24, and is a pair of members (first guide portion 57 and second guide portion 58) that are in close contact with the lead wire 24. It may be composed of. In this case, the lead wire 24 can be sealed by inserting the lead wire 24 into the groove of the first guide portion 57 and then sandwiching the lead wire 24 with the second guide portion 58. The lead wire seal portion 56 is preferably an integrally molded product in which the first guide portion 57 and the second guide portion 58 are connected by a hinge portion 59, and is configured to be openable and closable. The lead wire sealing portion 56 illustrated in FIG. 7 may be integrally molded with the outer packing 55, or may be configured as a separate component.

As illustrated in FIG. 6, the apparatus main body 11 has a fixing portion 53 to which the top plate 60 is screwed, outside the range surrounded by the annular groove 50. The fixing portion 53 is a support column in which a screw hole is formed, and is erected on the outside of the apparatus main body 11 so as to surround the top plate portion 14. The height of the upper end of the fixed portion 53 is substantially the same as the height of the peripheral wall 51, for example. The top plate 60 is arranged on the fixing portion 53, and is fixed on the fixing portion 53 using screws 68.

It is preferable that a plurality of fixing portions 53 are provided. In the present embodiment, four fixing portions 53 are erected on the outer surface of the inclined tubular wall portion 13 on the radial side of the apparatus main body 11 with respect to the annular groove 50. In this case, since the through hole through which the screw 68 is passed is not formed inside the annular groove 50 (outer packing 55), it is not necessary to seal the through hole, and it is easy to secure the airtightness of the space P.

The top plate 60 has a base portion 61 formed substantially flat, and a claw portion 62 protruding downward from the end of the base portion 61. The base portion 61 covers the entire range surrounded by the annular groove 50 above the top plate portion 14, and projects from the top plate portion 14 and is screwed to the fixing portion 53. The base portion 61 is placed on the peripheral wall 51 and is arranged so as to face the outer surface 14a of the top plate portion 14, and a part thereof projects outward from the annular groove 50 in the radial direction of the apparatus main body 11. The claw portion 62 is hooked on the upper end portion of the device main body 11 and stabilizes the position of the top plate 60 when screwed.

The base portion 61 is formed to be larger than the area surrounded by the annular groove 50 of the top plate portion 14, and has a through hole 63 formed in a portion protruding from the top plate portion 14. The through holes 63 may be holes to which the screws 68 are attached, and may be formed in the same number as the fixing portions 53. Further, the base portion 61 may be formed with, for example, a through hole 64 to which a binding band (not shown) for binding and tensioning the lead wire 24 is attached.

As described above, according to the lighting device 10 having the above configuration, by providing the outer packing 55 that seals the insertion hole 15 of the lead wire 24, insects, dust, moisture, corrosive gas, etc. can be introduced into the insertion hole 15. It is possible to prevent the light emitting module 20 from entering the accommodation space S. Further, by providing the inner packing 65, the airtightness of the accommodation space S can be further improved. Therefore, according to the lighting device 10, it is possible to more reliably suppress the occurrence of defects such as deterioration of the light emitting module 20 and defects due to tracking.

The annular groove 50 and the recess 52 may be filled with a resin having a high sealing property such as a silicone resin or an epoxy resin to serve as a sealing material. Further, the annular groove 50 may be filled with a silicone resin or the like, and the recess 52 may be provided with the lead wire sealing portion 56 as illustrated in FIG. Alternatively, a ring-shaped outer packing 55 having no lead wire sealing portion 56 may be fitted into the annular groove 50, and the gap between the lead wire 24 and the recess 52 may be filled with a silicone resin or the like.

10 Lighting device, 11 Device body, 12 Flange part, 13 Cylinder wall part, 14 Top plate part, 14a outer surface, 14b inner surface, 15 insertion hole, 16 through hole, 18 pin hole, 20 light emitting module, 21 light source part, 22 board , 23 Heat dissipation plate, 24 lead wire, 30 holder, 31 bottom plate, 32 peripheral wall, 33 holding part, 34 window hole, 35 protrusion, 36 boss part, 37 positioning pin, 38 screw (holder fixing screw), 39 pedestal part, 40 cover, 41 bottom plate, 42 peripheral wall, 45 recess, 50 annular groove, 51 peripheral wall, 52 recess, 53 fixing part, 55 outer packing, 56 lead wire seal part, 57 1st guide part, 58 2nd guide part, 59 hinge Part, 60 Top plate, 61 Base part, 62 Claw part, 63, 64 Through hole ,, 65 Inner packing, 68 screw (top plate fixing screw), 70 Mounting spring, 71 Support part, S storage space, P space

Claims (6)

A top-mounted device body with one end in the axial direction open and a top plate at the other end in the axial direction.
A light emitting module provided inside the main body of the device and
A holder fixed inside the device body and holding the light emitting module,
A translucent cover that engages with the holder and covers the light emitting module and the holder.
The lead wire connected to the light emitting module and
With
The apparatus main body has an insertion hole for the lead wire formed in the top plate portion and an annular groove formed so as to surround the insertion hole on a surface facing the outside of the top plate portion. ,
The sealing material provided in the annular groove and
A top plate for sandwiching the sealing material together with the top plate portion and sealing the space on the top plate portion surrounded by the sealing material, and
With more
The device main body is a lighting device having a fixing portion to which the top plate is screwed outside the range surrounded by the annular groove. The lighting device according to claim 1 , wherein the sealing material is a ring-shaped packing that is fitted into the annular groove. The apparatus main body has a recess for forming an opening for passing the lead wire between the top plate portion and the top plate.
The lighting device according to any one of claims 1 to 2 , wherein the sealing material has a lead wire sealing portion that closes a gap between the lead wire and the recess. The holder is fixed to the top plate portion using a holder fixing screw, and is fixed to the top plate portion.
The lighting device according to any one of claims 1 to 3 , wherein the through hole through which the holder fixing screw is inserted is formed in a range surrounded by the annular groove in the top plate portion. The holder has a positioning pin and
The device body has a pin hole into which the positioning pin is inserted.
The lighting device according to any one of claims 1 to 4 , wherein the pin hole is formed in a range surrounded by the annular groove in the top plate portion. The lighting device according to any one of claims 1 to 5 , further comprising an inner packing for sealing a gap between the inner surface of the device body and the cover.

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