JP7608489B2 - Lighting fixtures - Google Patents

Description

This disclosure relates to a lighting fixture that exhibits waterproof performance.

Some lighting fixtures installed under eaves or outdoors require waterproof performance. Emergency lighting fixtures in particular are required to be waterproof, as well as to maintain the illumination required for evacuation even during power outages that occur during disasters such as fires and earthquakes.

A lighting fixture with this type of waterproof performance has a waterproof housing, and the lighting device, storage battery, and other non-waterproof components are stored inside the housing. This prevents water from entering the interior of the lighting fixture and protects the non-waterproof components.

Patent Document 1 discloses a lighting fixture having a light source section with an annular packing that is in close contact with an emission port formed in a cover section and an emission member exposed from the emission port. The lighting fixture forms a light source unit by attaching the light source section to the cover section in close contact with a pressure spacer. This ensures that the lighting fixture has waterproof performance for the emission port.

JP 2018-97923 A

When installing a lighting fixture with waterproofing performance as described in Patent Document 1, the main unit is first attached to the ceiling. Next, the lighting unit attached to the main unit must be electrically connected to the light source unit. The lighting unit and the light source unit must be electrically connected before the light source unit is fixed to the main unit. This means that there is a risk that the light source unit will fall during the work before it is fixed to the main unit. Also, when the main unit is attached to the ceiling, the light source unit faces downward. Therefore, if a packing is attached to the light source unit, the packing is likely to fall off.

The present disclosure is intended to solve the above problem, and aims to provide a lighting fixture that can prevent the packing from falling off the light source holder during installation work.

The lighting device of the present disclosure comprises a light source that irradiates light, a light source holding unit that holds the light source, an optical unit that controls the distribution of light emitted from the light source, and an emission member having a flange formed on the outer periphery of the optical unit, a holder in which the emission member is arranged, a cover unit mounting member that supports the light source holding unit on the emission member side, a cover unit having an emission opening that exposes the emission member, and a gasket held by the cover unit and arranged between the emission member and the cover unit to seal a gap at the emission opening, wherein one side of the gasket is in close contact with the cover unit and the other side is in close contact with the flange and the holder , and the inner diameter side is arranged to be in contact along the outer periphery of the optical unit of the emission member .

In the lighting fixture according to the present disclosure, a packing that seals the gap at the light outlet is disposed between the light outlet member and the cover, which prevents the packing from falling off the light source holder during installation work.

1 is a perspective view showing a lighting fixture according to a first embodiment. 1 is an exploded perspective view showing a lighting fixture according to a first embodiment. FIG. 1 is an explanatory diagram showing a vertical cross section of a lighting device according to a first embodiment. FIG. 4 is an explanatory diagram showing an enlarged view of part A of FIG. 3 of the lighting device according to the first embodiment; FIG. 1 is a perspective view showing a lighting fixture without a cover portion and a gasket in accordance with a first embodiment; 1 is a perspective view showing a lighting fixture without a cover portion, a gasket, and a holder according to a first embodiment. FIG. 1 is a perspective view showing a lighting fixture according to a first embodiment without a cover portion, a gasket, a holder, a light source, and a heat sink. FIG. 4 is an explanatory diagram showing a longitudinal section of a packing, a monitor LED, and a switch according to the first embodiment; FIG. 13 is a plan view showing a lighting fixture without a cover in which the mounting position of the cover mounting member according to the first modified example of the first embodiment is shifted. FIG. 11 is an explanatory diagram showing a vertical cross section of a lighting fixture having a cover portion without a cover side portion in accordance with a second modified example of the first embodiment. FIG. FIG. 11 is an exploded perspective view showing a lighting fixture according to a third modification of the first embodiment. FIG. 11 is a perspective view showing a lighting fixture according to a second embodiment. FIG. 11 is an exploded perspective view showing a lighting fixture according to a second embodiment. FIG. 11 is an explanatory diagram showing a vertical cross section of a lighting device according to a second embodiment.

The following describes the embodiments with reference to the drawings. In each drawing, the same reference numerals denote the same or equivalent parts, and this is the same throughout the entire specification. In addition, in the drawings of cross-sectional views, hatching has been omitted as appropriate to improve visibility. Furthermore, the forms of the components shown in the entire specification are merely examples and are not limited to these descriptions.

Embodiment 1.
<Features of lighting fixture 1a>
FIG. 1 is a perspective view showing a lighting fixture 1a according to the first embodiment. FIG. 2 is an exploded perspective view showing the lighting fixture 1a according to the first embodiment. FIG. 3 is an explanatory diagram showing the lighting fixture 1a according to the first embodiment in a vertical cross section. FIG. 4 is an explanatory diagram showing an enlarged view of part A in FIG. 3 of the lighting fixture 1a according to the first embodiment. FIG. 5 is a perspective view showing the lighting fixture 1a without the cover part 10a and the packing 22 according to the first embodiment. FIG. 6 is a perspective view showing the lighting fixture 1a without the cover part 10a, the packing 22, and the holder 9 according to the first embodiment. FIG. 7 is a perspective view showing the lighting fixture 1a without the cover part 10a, the packing 22, the holder 9, the light source 5, and the heat sink 27 according to the first embodiment. FIG. 8 is an explanatory diagram showing the packing 22, the monitor LED 42, and the switch 45 according to the first embodiment in a vertical cross section.

<Configuration of lighting fixture 1a>
As shown in Fig. 3, the lighting fixture 1a is fixed to a mounting portion such as a ceiling. As shown in Fig. 2, the lighting fixture 1a includes a cover portion 10a, a light source portion 20, a lighting device 30, a power terminal block 40, and a main unit 60.

<Cover portion 10a>
1, 2 and 3, the cover portion 10a houses the lighting device 30, the holder 9 as a light source holding portion, the heat sink 27, the optical control member 21 as an emission member, and the cover portion attachment member 63a. The cover portion 10a is formed with an emission opening 14 that exposes the tip of the optical control member 21.

The cover part 10a is formed in a cylindrical shape with one end having a bottom and the other end being open. The cover part 10a has a cover front part 11 and a cover side part 12. The cover front part 11 is the bottom part at one end. The cover side part 12 is the peripheral part of the cylindrical shape. The cover part 10a houses the light source part 20, the lighting device 30, and the power terminal block 40 inside.

As shown in FIG. 2, a circular emission port 14 is formed in the center of the cover front surface 11, which is one end of the cover portion 10a. A circular opening 16 is formed on the other end of the cover portion 10a.

As shown in Figures 1, 2, and 3, a storage section 11-1 is formed around the emission port 14 of the cover front surface portion 11. As shown in Figure 3, the storage section 11-1 holds a packing 22. As shown in Figures 1 and 2, a plurality of display ports 15 are formed in the storage section 11-1. The display ports 15 enable the signal receiving section to receive an external signal. The display ports 15 enable the monitor LED 42 shown in Figure 8 to be visible from outside the lighting fixture 1a.

<Cover portion attachment member 63a>
As shown in Figures 2, 3, 4 and 5, the cover part attachment member 63a is attached to the main unit 60, and pulls the cover part 10a to the main unit 60 and fastens it, while supporting the holder 9 and the heat sink 27, which are the light source holding part, with the support part 64 so as to press them toward the optical control member 21, which is the emission member. The cover part attachment member 63a is provided in pair so as to sandwich the holder 9 and the heat sink 27. The cover part attachment member 63a has a length that extends from the main unit 60 to the back surface of the cover front part 11. The cover part attachment member 63a is formed by bending a metal plate into a U-shape to give it strength. The cover part attachment member 63a has a top surface portion that comes into surface contact with the back surface of the cover part 10a. The cover part attachment screw 10-1 is screwed into the top surface portion together with the cover part 10a.

The cover attachment member 63a supports the holder 9 holding the packing 22 and the heat sink 27 from the main unit 60 side with the support parts 64. In other words, the cover attachment member 63a is attached to the main unit 60, and supports the holder 9 and the heat sink 27 with the support parts 64 so as to press them towards the optical control member 21 side. The support parts 64 are formed on both bent parts of the tip of the cover attachment member 63a, which is made by bending a metal plate into a U-shape.

<Cover part mounting screw 10-1>
As shown in Figures 1, 2 and 3, the cover mounting screw 10-1 fastens the cover front part 11 to the cover mounting member 63a. A resin seal washer (not shown) is attached to the cover mounting screw 10-1 to seal the gap between the screw hole and the male thread. In other words, the cover mounting screw 10-1 is fastened with a seal washer added for waterproofing purposes. The cover mounting screw 10-1 also has a seal washer to prevent it from falling off. This reduces the risk of the cover mounting screw 10-1 falling off the cover part 10a.

The waterproof performance and fastening strength can be further increased by using two or more cover part mounting screws 10-1 to fasten the cover part 10a. Also, when using a single cover part mounting screw 10-1, waterproof performance and fastening strength can be reliably obtained by providing a separate fixing point by, for example, hooking a part of the cover part 10a away from the screw fastening point onto the main unit 60 or the cover part mounting member 63a.

<Light source unit 20>
As shown in FIGS. 1, 2, 3, 4, 5 and 6, the light source unit 20 has an optical control member 21, a light source 5, a heat sink 27 and a holder 9.

As shown in FIG. 3, the optical control member 21 is an emission member that controls the light distribution of the light emitted from the light source 5 shown in FIG. 6. The optical control member 21 is formed of a non-flammable material such as glass. The optical control member 21 has an optical section 21-1 formed in a hemispherical or dome shape, and a flange section 21-2 formed on the outer periphery of the optical section 21-1. The optical section 21-1 is a lens that controls the light distribution of the light emitted from the light source 5.

<Packing 22>
2 and 5, the packing 22 closes the gap of the emission port 14. The packing 22 is a sheet-shaped member made of silicon, and is placed on the cover portion 10a. That is, the packing 22 is placed on the cover portion 10a and assembled. The packing 22 may be attached to the cover portion 10a at a distance from the holder 9 and the heat sink 27.

As shown in Figures 3 and 4, the packing 22 has a packing opening 22-1, a thin-walled portion 22-2, an outer periphery 22-3, and an outermost periphery 22-4.

The packing opening 22-1 is formed in the center of the packing 22. The packing opening 22-1 and the emission port 14 expose the optical control member 21 to the external emission side.

The thin-walled portion 22-2 is formed so as to surround the packing opening 22-1. The back side of the thin-walled portion 22-2, which is in contact with the holder 9, is formed in a concave shape by the thickness of the L-shaped rib 93 formed on the holder 9. The concave portion of the back side of the thin-walled portion 22-2 is fixed in close contact with the L-shaped rib 93 of the holder 9. The shape of the inner circumference side of the thin-walled portion 22-2 may be formed in a ring shape parallel to the storage section 11-1 of the cover front surface portion 11, or may be formed so as to protrude to the external emission side. The thin-walled portion 22-2 is placed on the outer circumference side of the flange portion 21-2 and the optical portion 21-1 of the optical control member 21 so as to protrude to the external emission side. The thin-walled portion 22-2 is arranged between the optical control member 21, the holder 9, the edge of the emission port 14, and the storage section 11-1 and is in close contact with them.

The outer peripheral portion 22-3 is formed so as to surround the thin-walled portion 22-2. The outer peripheral portion 22-3 is formed to be thicker than the thin-walled portion 22-2. The outer peripheral portion 22-3 is placed on the holder 9. The outer peripheral portion 22-3 is positioned and pressed between the holder 9 and the storage portion 11-1.

The outermost portion 22-4 is formed to surround the outer peripheral portion 22-3. The outermost portion 22-4 is formed with an outer peripheral protrusion that protrudes further toward the holder 9 than the outer peripheral portion 22-3. The outermost portion 22-4 is positioned and fixed between the outer periphery of the holder 9 and the inner wall of the heat sink 27.

When the cover portion 10a is fastened to the cover portion mounting member 63a, the packing 22 is in close contact with the cover portion 10a surrounding the emission port 14, the optical control member 21 which is the emission member, and the holder 9 and heat sink 27 which are the light source holding portion. The packing 22 is then placed and pressed between the optical control member 21 or the holder 9 and the storage portion 11-1 of the cover front portion 11. This creates a seal between the optical control member 21 and the cover front portion 11 by the packing 22, ensuring the waterproofing of the lighting fixture 1a.

In the technology of Patent Document 1, the packing is attached to the cover part together with the light source holding part in advance so as to close the gap on the opening side of the cover part. In contrast, the cover part 10a shown in FIG. 3 is separated from the light source holding part that holds the light source 5 before the installation work is performed. Here, the light source holding part is the holder 9 and the heat sink 27. In other words, the packing 22 attached to the cover part 10a side is attached to a different cover part 10a from the holder 9 and the heat sink 27 that hold the light source 5 before the installation work is performed. In this case, the packing 22 is placed on the cover part 10a separated from the holder 9 and the heat sink 27 and is shipped in an assembled state.

When installing the lighting fixture 1a, the main unit 60 with the light source 5 attached is first attached to the ceiling. When the main unit 60 is attached to the ceiling, the holder 9 and heat sink 27, which are the light source holding parts, face downward. Therefore, if the packing 22 is attached to the holder 9 and heat sink 27, which are the light source holding parts, the packing 22 is likely to fall off.

In contrast, when the gasket 22 is placed on the cover portion 10a, the gasket 22 is not attached to the holder 9 and the heat sink 27, so the gasket 22 is more prevented from falling off the main unit 60 attached to the ceiling.

The part of the packing 22 that covers the display opening 15 is made thin so that the light from the monitor LED 42 can pass through the packing 22.

<Holder 9>
5, the holder 9 is screwed to the heat sink 27. The holder 9 and the heat sink 27 sandwich the light source board 51 as shown in FIG 6 placed on the heat sink 27. The holder 9 has a holder opening 91, an L-shaped rib 93, a hinge portion 94, and an arm portion 95.

The holder opening 91 is formed in the center of the holder 9. The holder opening 91 exposes the light source LED 52 mounted on the light source board 51 as shown in FIG. 6.

On the front surface of the holder 9, multiple L-shaped ribs 93 with an L-shaped cross section are formed. The inner surfaces of the multiple L-shaped ribs 93 are arranged to hold the flange portion 21-2 of the optical control member 21. The optical control member 21 in the component state is slid in a direction intersecting with the optical axis direction. As a result, the flange portion 21-2 comes into contact with the multiple L-shaped ribs 93, and the optical control member 21 is held in the holder 9.

The hinge portion 94 is provided on the front surface of the holder 9. The hinge portion 94 fixes the optical control member 21 to the holder 9 using a screw 94-1. This causes the holder 9 to hold the optical control member 21.

In this way, the holder 9 has an L-shaped rib 93 and a hinge portion 94. With this configuration, the holder 9 holds the optical control member 21 in a state where the optical axes of the light source board 51 as shown in FIG. 6 and the optical control member 21 as shown in FIG. 5 are aligned.

The pair of arms 95 extend from the holder 9 into an area where the heat sink 27 is not present. A shaft (not shown) is formed on the inside of each tip of the pair of arms 95. The shaft is attached to the bearing 31-5 of the lighting device 30.

The holder 9 attached to the lighting device 30 can rotate freely around the axis. The storage battery 34 of the lighting device 30 can be replaced by rotating the holder 9.

<Light source 5>
6 , the light source 5 is turned on by power supplied from the lighting device 30. That is, the light source 5 emits light. The light source 5 includes a light source substrate 51, one or more light source LEDs 52 mounted on the light source substrate 51, and a connector 53 mounted on the light source substrate 51.

The light source 5 is placed on the heat sink 27 and fixed to the heat sink 27 by the holder 9. A heat conductive sheet (not shown) may be sandwiched between the light source substrate 51 and the heat sink 27. This allows the heat conductive sheet to reduce the thermal resistance at the contact surface between the light source substrate 51 and the heat sink 27.

<Heat sink 27>
6, the heat sink 27 is made of a metal having high thermal conductivity, such as an aluminum alloy, and has a base 27-1 and an edge 27-2 formed on the outer periphery of the base 27-1 so as to be one step higher than the base 27-1.

The base 27-1 mounts the light source board 51 and holder 9. The base 27-1 abuts against the rear surface of the light source board 51. As a result, the base 27-1 transfers heat generated from the light source LEDs 52 via the light source board 51 to the edge 27-2. The size and shape of the heat sink 27 are changed as appropriate according to the output of the light source 5. The edge 27-2 abuts against the support portion 64 of the cover attachment member 63a.

<Lighting device 30>
As shown in Fig. 7, the lighting device 30 is attached to the main unit 60 and lights up the light source 5. The lighting device 30 has a case 31, a cover 32, a storage battery 34, and a circuit board (not shown). The case 31 and the cover 32 are molded from resin and fitted together. The circuit board is held inside the fitted case 31 and cover 32.

<Case 31>
The emission side surface of the case 31 has a case opening 31-2 and a push button 31-3.

The case opening 31-2 passes through and allows multiple monitor LEDs 42, as shown in Figure 7, mounted on the internal circuit board to be visible.

The push button 31-3 has a protrusion and a U-shaped slit 31-4 that surrounds the protrusion of the push button 31-3. This ensures that the push button 31-3 has an operating stroke for pressing a switch 45 as shown in FIG. 8, which is mounted on a circuit board.

A pair of bearings 31-5 are formed on the side of the case 31. The shaft of the holder 9 is rotatably attached to the bearings 31-5.

A pair of hooks 31-6, as shown in FIG. 3, are formed on the side of the case 31 that is attached to the main unit 60. The hooks 31-6 protrude from through holes in the fixing bracket (not shown) and are hooked into the lighting device mounting holes 61-5 in the top plate 61. This allows the lighting device 30 to be held by the fixing bracket and the top plate 61.

The bottom surface of the case 31 is formed with multiple mounting claws (not shown) and confirmation holes (not shown). The mounting claws fit into the case mounting holes formed in the fixing brackets. The confirmation holes are holes for checking whether or not there is a circuit board inside the case 31.

<Cover 32>
The cover 32 is formed in a box shape with one side open, and covers the component side of the circuit board mounted inside. The side of the cover 32 is formed with a cover-side guide portion 32-2, a cover-side connection portion (not shown), and a groove portion (not shown).

<Storage battery 34>
The storage battery 34 is a box-shaped unit and includes a storage battery side guide portion 34-2, a connector portion (not shown), a storage battery fixing portion (not shown), and a storage battery protruding portion (not shown).

The battery side guide portion 34-2 and the cover side guide portion 32-2 are fitted together. This allows the battery 34 to be slidably fitted to the cover 32. When the fitted battery 34 is pushed in further, the battery fixing portion of the battery 34 fits into the groove of the cover 32 and the battery protrusion abuts against the cover 32. In this state, the battery 34 is fixed to the cover 32. At this time, the connector portion of the battery 34 is connected to the cover side connection portion. This connection electrically connects the battery 34 to the circuit board housed in the cover 32.

<Circuit board>
The circuit board has a charging circuit that charges the storage battery 34 during normal operation when power is supplied from a commercial power source, and a lighting circuit that lights the light source 5 with power supplied from the storage battery 34 during an emergency when the supply of power from the commercial power source is stopped. The circuit board has an inspection circuit used for an inspection operation that determines whether the light source 5 can be turned on for a rated time specified by the Building Standards Act with power supplied from the storage battery 34, a switch 45 as shown in Fig. 8 for starting the inspection operation, and a signal receiving unit that receives a start signal for starting the inspection operation by a remote controller.

The switch 45 for starting the inspection operation may be disposed inside the cover portion 10a and may be configured to be operable when the cover portion 10a is removed. Alternatively, the switch 45 may be configured to be operable from outside the cover portion 10a without removing the cover portion 10a by providing an opening in the cover portion 10a and placing the packing 22 or another packing on the switch 45.

<Main unit 60>
3, the main unit 60 is attached to the mounting portion. The main unit 60 covers the opening 16 of the cover portion 10a. The main unit 60 has a top plate 61 and a waterproof member 70.

The main unit 60 has a fixture mounting hole 60-1 in the center. An electric wire is pulled in through the fixture mounting hole 60-1 from the outside. The pulled in electric wire is connected to the lighting device 30. The main unit 60 has a cover part mounting member 63a at a position different from the fixture mounting hole 60-1. The cover part mounting member 63a and the fixture mounting hole 60-1 are positioned so that they do not overlap when viewed from approximately below.

<Attachment of cover portion 10a>
The cover part 10a is fastened to the cover part mounting member 63a using a cover part mounting screw 10-1. By fastening, the cover part 10a is pulled toward the main unit 60. The holder 9, which is a light source holding part that holds the packing 22, and the heat sink 27 are supported by the cover part mounting member 63a from the main unit 60 side. The support part 64 of the cover part mounting member 63a supports the edge part 27-2.

As shown in FIG. 5, the holder 9 and heat sink 27 are held at two points by the cover attachment member 63a on the storage battery 34 side. On the other hand, the cover attachment member 63a on the push button 31-3 side does not support the holder 9 and heat sink 27 from the main unit 60 side in FIG. 5.

The cover part 10a is fastened to the cover part mounting member 63a using the cover part mounting screw 10-1. As a result, the packing 22 closes the gap at the emission port 14 of the cover part 10a. In this way, with the cover part 10a fastened to the cover part mounting member 63a, the packing 22 is in close contact with the cover part 10a surrounding the emission port 14, the optical control member 21 which is the emission member, and the holder 9 and heat sink 27 which are the light source holding parts.

<Modification 1>
Fig. 9 is a plan view showing a lighting fixture 1a without a cover 10a in which the mounting position of the cover mounting member 63a according to the first modification of the first embodiment is shifted. As shown in Fig. 9, the mounting position of the cover mounting member 63a to the main unit 60 may be shifted differently from that of the first embodiment. In this case, the two cover mounting members 63a can support the holder 9 and the heat sink 27, which are the light source holding portion, by sandwiching them in opposing positions in a plan view.

<Modification 2>
Fig. 10 is an explanatory diagram showing a vertical cross section of a lighting fixture 1a including a cover portion 10a without a cover side portion 12 according to a second modification of the first embodiment. The lighting fixture 1a may be a type other than a direct-attached type that is directly attached to a ceiling. As shown in Fig. 10, the lighting fixture 1a may be a recessed type that is embedded in a ceiling 80.

<Modification 3>
Fig. 11 is an exploded perspective view showing a lighting fixture 1a according to Modification 3 of Embodiment 1. As shown in Fig. 11, packing 22 has slits 22a. Slits 22a allow a portion of packing 22 to bend freely. As a result, when holder 9 moves, packing 22 is bent at slits 22a, and packing 22 does not interfere with the movement of holder 9. Here, outermost periphery 22-4 of packing 22 is fixed between the outer periphery of holder 9 and the inner periphery of heat sink 27. As a result, even if packing 22 is attached to holder 9 and heat sink 27, which are light source holding parts, falling off of packing 22 is prevented.

<Action>
An optical control member 21, which is an emission member, protrudes from the emission port 14, and a sheet-like packing 22 closes the gap at the emission port 14. This ensures the waterproof performance of the lighting fixture 1a without using a glass globe or glass panel.

The cover part 10a and the light source 5 attached to the main unit 60 are separate parts. Therefore, unlike the technology described in Patent Document 1, there is no need to make an electrical connection between the cover part and the main unit during installation. In the first embodiment, during installation, the main unit 60 is first attached to the mounting portion such as a ceiling, and electrical work is performed. Next, when the cover part 10a is attached to the main unit 60, the waterproof lighting fixture 1a can be installed.

The packing 22 closes the gap at the emission port 14 by being pressed from the cover 10a toward the main unit 60, and by being pressed from the cover mounting member 63a toward the cover 10a via the holder 9, which is the light source holding part, and the heat sink 27. With this configuration, when the cover mounting screw 10-1 is tightened, the packing 22 is brought into close contact with the gap at the emission port 14 of the cover 10a.

The cover front part 11, which is not the back side of the cover part 10a, is attached to the cover part attachment member 63a provided on the main unit 60. This eliminates the need to tighten screws in a recessed location when attaching the cover part 10a, improving workability during installation.

<Effects of First Embodiment>
According to the first embodiment, the lighting fixture 1a includes a main unit 60 attached to the mounting portion. The lighting fixture 1a includes a light source 5 that emits light. The lighting fixture 1a includes a lighting device 30 that is attached to the main unit 60 and turns on the light source 5. The lighting fixture 1a includes a holder 9 and a heat sink 27 that are light source holding parts that hold the light source 5. The lighting fixture 1a includes an optical control member 21 that is an emission member that controls the distribution of light emitted from the light source 5. The lighting fixture 1a includes a cover part attachment member 63a that is attached to the main unit 60 and supports the holder 9 and the heat sink 27 on the optical control member 21 side. The lighting fixture 1a includes a cover part 10a that houses the lighting device 30, the holder 9, the heat sink 27, the optical control member 21, and the cover part attachment member 63a, and has an emission opening 14 that exposes the optical control member 21. The lighting fixture 1a includes a packing 22 that closes a gap in the emission opening 14. The cover portion 10a is fastened to the cover portion mounting member 63a using the cover portion mounting screw 10-1, and is thereby pulled toward the main unit 60. With the cover portion 10a fastened to the cover portion mounting member 63a, the packing 22 is in close contact with the cover portion 10a surrounding the emission port 14, the optical control member 21, the holder 9, and the heat sink 27.

With this configuration, the light source 5 is attached to the main unit 60 in advance, and there is no need to electrically connect the light source 5 and the main unit 60 during installation, and the light source 5 can be prevented from falling after the main unit 60 is attached to a mounting portion such as a ceiling. In addition, the optical control member 21, which is the emission member, protrudes from the emission port 14, and the sheet-like packing 22 seals the gap in the emission port 14. This ensures the waterproof performance of the lighting fixture 1a without using a glass globe or glass panel.

According to embodiment 1, the gasket 22 is placed on the cover portion 10a and assembled.

When installing the lighting fixture 1a, first the main unit 60 holding the light source 5 is attached to the mounting portion such as the ceiling. In the main unit 60 attached to the mounting portion, the holder 9 and heat sink 27 face downward. Therefore, if the packing 22 is attached to the holder 9 and heat sink 27, there is a risk that the packing 22 will fall off, and it is necessary to fix it at the outermost periphery 22-4. On the other hand, if the packing 22 is placed on the cover portion 10a, the packing 22 will not be placed on the main unit 60 attached to the mounting portion such as the ceiling, and the packing 22 can be prevented from falling off when installing the lighting fixture 1a to the main unit 60.

According to the first embodiment, the cover attachment screw 10-1 is tightened with a seal washer added.

With this configuration, a seal washer is further attached to the cover mounting screw 10-1 to prevent it from falling off. This ensures waterproofing and reduces the possibility of the cover mounting screw 10-1 falling off the cover 10a.

According to embodiment 1, the cover attachment member 63a is positioned so as not to overlap with the instrument attachment hole 60-1 provided in the main unit 60 when viewed from approximately below.

With this configuration, the mounting stress of the cover part 10a is received by the mounting part such as the ceiling via the main unit 60 and is not transmitted directly to the fixture mounting hole 60-1. This makes it possible to prevent the main unit 60, which is attached to the mounting part such as the ceiling, from excessively entering the fixture mounting hole 60-1 when the cover part 10a is attached.

Embodiment 2.
<Lighting fixture 1b>
Fig. 12 is a perspective view showing a lighting fixture 1b according to embodiment 2. Fig. 13 is an exploded perspective view showing a lighting fixture 1b according to embodiment 2. Fig. 14 is an explanatory diagram showing a vertical cross section of lighting fixture 1b according to embodiment 2. In embodiment 2, the description of the same matters as in embodiment 1 is omitted, and only the characteristic parts are described.

<Cover portion 10b>
12, 13, and 14, the cover portion 10b houses the lighting device 30, the holder 9, the heat sink 27, the optical control member 21, and the support member 63b. The cover portion 10b is formed with an emission port 14 that exposes the optical control member 21. The cover portion 10b has a cover front surface portion 11, a cover side surface portion 12, and an attachment portion 13.

<Mounting portion 13>
The mounting portion 13 is provided on the outer edge of the opening 16, which is the other end side of the cover portion 10b. The mounting portion 13 is formed in a flange shape that protrudes in the outer circumferential direction. The mounting portion 13 is fastened to the main unit 60 using a cover portion mounting screw 10-1. By fastening, the cover portion 10b is drawn toward the main unit 60. The mounting portion 13 has a plurality of cover portion fastening holes 13-1 formed therein.

<Support member 63b>
The support member 63b supports the holder 9 holding the packing 22 and the heat sink 27 from the main unit 60 side by the support parts 64. That is, the support member 63b is attached to the main unit 60, and supports the holder 9 and the heat sink 27 on the optical control member 21 side by the support parts 64. As shown in Fig. 12, the holder 9 and the heat sink 27 are supported from the main unit 60 side by a plurality of support parts 64, for example, four places on the two support members 63b. In the second embodiment, the support range of the support parts 64 is larger than that in the first embodiment.

<Annular protrusion 61-2>
The top plate 61 has an annular protrusion 61-2 formed on the outer periphery. A plurality of cover part mounting holes 61-8 are formed in the annular protrusion 61-2. The cover part mounting holes 61-8 are machined into a countersunk shape and have internal threads. A cover part mounting screw 10-1 is screwed into the cover part mounting hole 61-8.

<Attachment of cover portion 10b>
The cover part fastening hole 13-1 and the cover part mounting hole 61-8 are fastened together using the cover part mounting screw 10-1. This holds the cover part 10b on the top plate 61. In other words, the cover part 10b is fastened to the main unit 60 via the top plate 61 using the cover part mounting screw 10-1. This causes the cover part 10b to be pulled toward the main unit 60.

The cover part 10b is fastened to the main unit 60 via the top plate 61 using the cover part mounting screw 10-1. As a result, the packing 22 closes the gap at the emission port 14 of the cover part 10b. With the cover part 10b fastened to the main unit 60, the packing 22 is in close contact with the cover part 10b, the optical control member 21, the holder 9, and the heat sink 27 that surround the emission port 14.

<Action>
The cover portion 10b is fastened to the mounting portion 13 arranged on the circumferential side in a plan view of the main unit 60. This allows for uniform pressing of the packing 22. In particular, the greater the number of the cover portion fastening holes 13-1 and the cover portion mounting holes 61-8, the more the pressing force of the packing 22 is dispersed in the circumferential direction by the number of the cover portion fastening holes 13-1 and the cover portion mounting holes 61-8.

<Effects of the Second Embodiment>
According to the second embodiment, the lighting fixture 1b includes a main unit 60 attached to the mounting portion. The lighting fixture 1b includes a light source 5 that emits light. The lighting fixture 1b includes a lighting device 30 that is attached to the main unit 60 and turns on the light source 5. The lighting fixture 1b includes a holder 9 and a heat sink 27 that are light source holding parts that hold the light source 5. The lighting fixture 1b includes an optical control member 21 that is an emission member that controls the distribution of light emitted from the light source 5. The lighting fixture 1b includes a support member 63b that is attached to the main unit 60 and supports the holder 9 and the heat sink 27 on the optical control member 21 side. The lighting fixture 1b includes a cover portion 10b that houses the lighting device 30, the holder 9, the heat sink 27, the optical control member 21, and the support member 63b, and has an emission opening 14 that exposes the optical control member 21. The lighting fixture 1b includes a packing 22 that closes a gap in the emission opening 14. The cover portion 10b is pulled toward the main unit 60 by being fastened to the main unit 60 via the top plate 61 using the cover portion mounting screw 10-1. With the cover portion 10b fastened to the main unit 60 via the top plate 61, the packing 22 is in close contact with the cover portion 10b surrounding the emission port 14, the optical control member 21, the holder 9, and the heat sink 27.

With this configuration, the light source 5 is attached to the main unit 60 in advance, and there is no need to electrically connect the light source 5 and the main unit 60 during installation, and the light source 5 can be prevented from falling after the main unit 60 is attached to a mounting portion such as a ceiling. In addition, the optical control member 21, which is the emission member, protrudes from the emission port 14, and the sheet-like packing 22 seals the gap in the emission port 14. This ensures the waterproof performance of the lighting fixture 1b without using a glass globe or glass panel.

1a lighting fixture, 1b lighting fixture, 5 light source, 9 holder, 10-1 cover part mounting screw, 10a cover part, 10b cover part, 11 cover front part, 11-1 storage part, 12 cover side part, 13 mounting part, 13-1 cover part fastening hole, 14 emission port, 15 display port, 16 opening, 20 light source part, 21 optical control member, 21-1 optical part, 21-2 flange part, 22 packing, 22-1 packing opening, 22-2 thin part, 22-3 outer periphery, 22-4 outermost periphery, 22a slit, 27 heat sink, 27-1 base part, 27-2 edge part, 30 lighting device, 31 case, 31-2 case opening, 31-3 push button, 31-4 slit, 31-5 Bearing portion, 31-6 hook portion, 32 cover, 32-2 cover side guide portion, 34 storage battery, 34-2 storage battery side guide portion, 40 power terminal block, 42 monitor LED, 45 switch, 51 light source board, 52 light source LED, 53 connector, 60 main unit, 60-1 fixture mounting hole, 61 top plate, 61-2 ring convex portion, 61-5 lighting device mounting hole, 61-8 cover portion mounting hole, 63a cover portion mounting member, 63b support member, 64 support portion, 70 waterproof member, 80 ceiling, 91 holder opening, 93 L-shaped rib, 94 hinge portion, 94-1 screw, 95 arm portion.

Claims (2)

A light source that irradiates light;
a light source holding unit that holds the light source;
an optical unit that controls the distribution of light emitted from the light source, and an emission member having a flange portion formed on an outer periphery of the optical unit;
a holder in which the emission member is disposed;
a cover portion attachment member that supports the light source holding portion on the light output member side;
a cover portion having an emission port for exposing the emission member;
a packing that is held by the cover portion, that is disposed between the light emitting member and the cover portion, and that closes a gap of the light emitting port;
Equipped with
The packing is
A lighting fixture arranged so that one side is in close contact with the cover portion, the other side is in close contact with the flange portion and the holder , and the inner diameter side is in contact along the outer circumferential surface of the optical portion of the emission member . The lighting device according to claim 1, wherein a portion of the packing protrudes from the light outlet.

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