JP2023065683A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device which has a structure formed by attaching a cover to a body and achieves improvement of waterproofness.

SOLUTION: A lighting device of the invention includes: a light source part 20 having a light source 5 and an optical control member 21 which controls a direction and a range in which a light beam emitted from the light source 5 travels; a heat sink in which the light source part 20 is attached to one side; a cover part which houses the light source part 20 and is formed with an emission port 14 for exposing the optical control member 21; a packing 22 disposed between the light source part 20 and the cover part; and a machine screw 10-3 which draws the heat sink to the cover part side to fix the packing 22 in a pressing manner.

SELECTED DRAWING: Figure 5

COPYRIGHT: (C)2023,JPO&INPIT

Description

TECHNICAL FIELD The present invention relates to lighting fixtures, and more particularly to a positioning structure between a cover and a main body unit.

2. Description of the Related Art Conventionally, there has been known a lighting fixture that is installed by attaching a cover that covers built-in parts to a main body that is attached to a ceiling or the like (see Patent Document 1, for example). The lighting fixture described in Patent Document 1 includes an engaging claw inside a cover and an engaging groove formed on the side surface of a cylindrical main body. After the engaging claws provided on the cover are aligned with the engaging grooves of the main body, the cover is locked to the main body by rotating the cover.

JP 2008-192332 A

The lighting fixture described in Patent Document 1 rotates and attaches a cover to a main body in which a lamp, a lighting circuit, and the like are installed. Therefore, there is a problem that a gap is generated between the cover and the main body, and water easily enters the inside.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the problems described above, and to provide a lighting fixture having a structure in which a cover is attached to a main body and having improved waterproofness. .

A lighting fixture according to the present invention comprises a light source, a light source section having an optical control member for controlling the traveling direction and range of light rays emitted from the light source, a radiator plate to which the light source section is attached on one side, and the light source section. and a cover portion formed with an exit port for exposing the optical control member, a packing disposed between the light source portion and the cover portion, and the heat sink by drawing the heat sink toward the cover portion. and a screw for fixing the packing so as to press it.

According to the present invention, the packing is arranged between the light source and the cover having the light output opening, and the heat sink to which the light source is fixed is fixed by the screw so as to be pulled toward the cover. It is pressed between the light source section and the cover section to close the gap, thereby improving waterproofness.

1 is a perspective view showing a lighting fixture 1a according to Embodiment 1. FIG. 1 is an exploded perspective view showing lighting fixture 1a according to Embodiment 1. FIG. Figure 3 is an exploded perspective view of the cover assembly 10 of Figure 2; 1 is a cross-sectional view of lighting fixture 1a according to Embodiment 1. FIG. 5 is an enlarged view of the periphery of a light source unit 20 in FIG. 4; FIG. 4 is an explanatory diagram of a cross-sectional structure of a comparative example around the light source unit 20 of the lighting fixture 1a according to Embodiment 1. FIG. FIG. 2 is an explanatory diagram of an example of a cross-sectional structure around a light source unit 20 of the lighting fixture 1a according to Embodiment 1; 2 is an explanatory diagram of a cross-sectional structure perpendicular to the optical axis L of the lighting fixture 1a according to Embodiment 1. FIG. It is a modified example of the guide bracket 12 of the lighting fixture 1a according to the first embodiment.

Illumination devices according to embodiments of the present invention will be described in detail below with reference to the drawings. In the drawings below, the size relationship of each component may differ from the actual size. Moreover, in the following drawings, the same reference numerals denote the same or corresponding parts, and this applies throughout the specification. Furthermore, the forms of the components shown in the entire specification are merely examples, and are not limited to these descriptions.

Embodiment 1.
<Lighting equipment 1a>
FIG. 1 is a perspective view showing a lighting fixture 1a according to Embodiment 1. FIG. FIG. 2 is an exploded perspective view showing the lighting fixture 1a according to Embodiment 1. FIG. 3 is an exploded perspective view of the cover assembly 10 of FIG. 2. FIG. The lighting fixture 1a includes a housing 50 formed in a substantially cylindrical shape. A portion of the housing 50 on the side of the top surface 80 is attached to a mounting portion such as a ceiling via a waterproof packing 90 . The bottom surface of the housing 50 serves as the cover front surface portion 11, which is the portion from which the light beam from the light source 5 (see FIG. 5) is emitted.

As shown in FIG. 2, the lighting fixture 1a is fixed to a mounting portion such as a ceiling. The lighting fixture 1 a includes a cover assembly 10 , a lighting device 30 and a body unit 60 . The cover assembly 10 is formed by fixing the light source part 20 to the cover part 10a. The main body unit 60 has the power supply terminal block 40 fixed to the main body structural portion 60a, and further the lighting device 30 is attached. The body structure portion 60a has a top surface 80 and is a portion fixed to the attached portion. A plurality of display openings 15 are formed in the cover portion 10a of the lighting device 1a. The display port 15 is a portion that receives an external signal.

<Cover Assembly 10>
As shown in FIG. 3, the cover assembly 10 includes a cover portion 10a, a light source portion 20, and a radiator plate 27. As shown in FIG. The cover portion 10a has a cylindrical shape with a bottom, and accommodates the power terminal block 40 and the lighting device 30 fixed to the main unit 60 inside the cylindrical portion, and the light source portion 20 fixed to the cover portion 10a. The cover part 10a constitutes a part of the housing 50 of the lighting device 1a together with the main structure part 60a. The cover portion 10a has a cover front surface portion 11 corresponding to a bottom portion of a cylindrical shape with a bottom, and a cover side surface portion 13 corresponding to a cylindrical portion. A guide fitting 12 is fixed to the inner surface of the cover side portion 13 of the cover portion 10a. The cover portion 10a has a cover front surface portion 11 forming a cylindrical bottom surface 10e (see FIG. 5), and an exit port 14 for exposing the optical control member 21 is formed. The light source section 20 and the packing 22 are fixed to the bottom surface 10e of the cover section 10a, which is the surface on the inner side of the front cover section 11 of the cover section 10a. A signal receiving section (not shown) and a monitor packing 23 are fixed to the bottom surface 10e of the cover section 10a. The light source section 20, the packing 22, the signal receiving section, and the monitor packing 23 are sandwiched between the cover front section 11 and the heat sink 27 and are pressed and fixed. The packing 22 is also called a lens packing.

<Light source unit 20>
FIG. 4 is a cross-sectional view of the lighting fixture 1a according to Embodiment 1. FIG. FIG. 4 shows the cross-sectional structure of the lighting fixture 1a along the optical axis L of the light emitted from the light source 5. As shown in FIG. FIG. 5 is an enlarged view of the periphery of the light source unit 20 in FIG. The light source unit 20 includes a holder 9 to which the light source 5 and the optical control member 21 are attached. A radiator plate 27 is attached to the light source unit 20, and the radiator plate 27 is fixed to the bottom surface of the cover unit 10a with screws 10-3. The optical control member 21 is, for example, a lens, and is a member that controls the traveling direction and range of light rays emitted from the light source 5 . The optical control member 21 has an optical control portion 21a projecting in the direction in which the light beam is emitted from the light source 5, that is, the direction of the optical axis L, and a flange portion 21b projecting outward from the optical control portion 21a. And prepare. The flange portion 21b is fixed to the holder 9 by an L-shaped rib 9b. The optical axis L is the central axis of light rays emitted by the light source 5, and coincides with the central axis of the lighting fixture 1a in the first embodiment. That is, the optical axis L coincides with the central axis of the cylinder formed by the cover side surface portion 13 of the cover portion 10a. In the following description, the structure may be described using the optical axis L instead of the central axis of the lighting fixture 1a and the central axis of the cylindrical body formed by the cover side surface portion 13. FIG.

The holder 9 of the light source section 20 is fixed by engaging the engaging portion 9 a with the heat sink 27 . The radiator plate 27 is fixed inside the cover portion 10a by means of screws 10-3 so as to be pulled toward the cover front portion 11 side. The light source unit 20 and the packing 22 are sandwiched between the radiator plate 27 and the cover front surface portion 11 of the cover portion 10a, and are pressed and fixed. The screw 10-3 passes through a screw packing 10-4 arranged between the cover front portion 11 and the radiator plate 27 and is screwed into the radiator plate 27. As shown in FIG. Since the screw packing 10-4 is compressed between the front cover portion 11 and the radiator plate 27, the airtightness and waterproofness of the inside of the housing 50 are improved.

<Structure of Peripheral Portion of Light Source Unit 20>
As shown in FIGS. 3 and 5, a packing 22 is arranged between the light source section 20 and the cover front section 11, and the packing 22 closes the gap between the optical control member 21 and the exit port 14. , to improve the waterproofness and airtightness of the inside of the housing 50 . The packing 22 is formed in an annular shape and arranged so as to surround the optical control portion 21a, which is the projecting portion of the optical control member 21. As shown in FIG. In other words, the annular packing 22 surrounds the optical control portion 21a of the optical control member 21 with the optical axis L as the center.

<Structure of Peripheral Portion of Light Source Unit 20>
As shown in FIG. 5, the periphery of the outlet 14 of the cover portion 10a is formed so as to protrude toward the outside of the cover portion 10a. That is, when viewed from the inside of the cover portion 10a, the bottom surface 10e of the bottomed cylindrical cover portion 10a has a packing placement surface 10c that is recessed in the direction in which light rays are emitted from the surrounding surface 10b. The packing arrangement surface 10c is formed in an annular shape around the exit port 14. As shown in FIG. A connecting surface 10d extending in the direction along the optical axis L is formed between the packing arrangement surface 10c and the surrounding surface 10b. In the cross-sectional shape shown in FIG. 5 , the packing 22 is formed in an L shape around the exit 14 . The packing 22 is arranged along the packing arrangement surface 10c and the connection surface 10d.

<Packing 22>
The packing 22 is formed thick at least at the inner periphery. The inner peripheral portion 22a of the packing 22 has a thickness capable of closing the gap formed between the packing arrangement surface 10c and the optical control member 21. As shown in FIG. That is, the thickness dimension of the inner peripheral portion 22a of the packing 22 is larger than the distance from the packing arrangement surface 10c to the optical control member 21. As shown in FIG. In FIG. 5, the inner peripheral portion 22a of the packing 22 is shown in a natural, uncompressed state, but in reality, at least the portion overlapping the optical control member 21 in FIG. 5 is compressed or deformed.

In the direction along the optical axis L, the thick portion 22b of the inner peripheral portion 22a of the packing 22, which is sandwiched between the optical control member 21 and the packing arrangement surface 10c, is compressed. In addition, the inner peripheral end portion 22 c of the inner peripheral portion 22 a of the packing 22 deforms along the shape of the optical control member 21 . The inner peripheral portion 22a of the packing 22 is formed such that the thickness dimension in the direction along the optical axis L decreases toward the inner peripheral side. The surface of the packing 22 shown in FIG. 5 on the side of the packing arrangement surface 10c is formed flat up to the tip on the inner peripheral side. The surface of the packing 22 facing the optical control member 21 side has an inclined surface 22f that inclines toward the packing arrangement surface 10c toward the inner peripheral side.

The thick portion 22b of the inner peripheral portion 22a of the packing 22 is compressed, shrinks in the vertical direction in FIG. 5, and expands in the horizontal direction. As a result, the inner peripheral end portion 22c located on the inner peripheral side of the thick portion 22b moves toward the inner peripheral side under the influence of the deformation of the thick portion 22b. At this time, the inner circumference side distal end portion 22c moves toward the optical control portion 21a, comes into contact with the optical control portion 21a, and is deformed. The inner circumference side distal end portion 22c has an inclined surface 22f on the surface on the optical control member 21 side, and is formed so that the thickness decreases toward the inner circumference side. Therefore, the protrusion of the inner circumference side tip portion 22 c from the exit port 14 is suppressed. The inner circumference side tip portion 22 c deforms along the shape of the optical control member 21 . Therefore, it is possible to suppress the formation of a gap between the packing 22 and the optical control member 21 . In addition, since the packing 22 is suppressed from protruding from the exit port 14, the optical characteristics of the light emitted from the optical control member 21 are not deteriorated, and the appearance of the lighting device 1a is not deteriorated.

In addition, the dimension of the outer peripheral portion 22d of the packing 22 in the direction along the optical axis L is set to be larger than the distance in the direction along the optical axis L from the packing placement surface 10c of the cover portion 10a to the surrounding surface 10b. is formed in The outer peripheral portion 22d of the packing 22 is sandwiched between the holder 9, which is a part of the light source section 20, and the packing placement surface 10c, and is compressed. Thereby, the packing 22 can improve the airtightness and waterproofness inside the lighting fixture 1a.

The inner peripheral portion 22a and the outer peripheral portion 22d of the packing 22 are connected by a connecting portion 22e. The connecting portion 22e of the packing 22 is formed so that the thickness dimension in the direction along the optical axis L is smaller than those of the inner peripheral portion 22a and the outer peripheral portion 22d. Therefore, the inner peripheral portion 22a and the outer peripheral portion 22d of the packing 22 are each compressed, but have a structure in which the deformation does not easily affect each other.

<Comparative example>
FIG. 6 is an explanatory diagram of a cross-sectional structure of a comparative example around the light source unit 20 of the lighting fixture 1a according to the first embodiment. FIG. 6(a) shows a state before the light source section 20 is fixed to the front cover section 11 of the cover section 10a. FIG. 6B shows a state in which the light source section 20 is fixed to the front cover section 11 of the cover section 10a. As shown in FIG. 6A, the packing 122 in the comparative example has an inner peripheral portion 122a with a uniform thickness. Then, as shown in FIG. 6B, when the packing 122 is compressed, the inner peripheral portion 122a deforms toward the inner peripheral side, and a portion protrudes from the emission port 14. As shown in FIG. The packing 122 is deformed so that part or all of the inner peripheral portion 122 a protrudes from the outlet 14 . Therefore, in the comparative example of the lighting device 1a, a gap may partially occur between the packing 122 and the packing arrangement surface 10c or between the packing 122 and the optical control member 21. FIG. As a result, in the comparative example of the lighting device 1a, there is a possibility that the airtightness and waterproofness may be deteriorated.

<Modified example of packing 22>
FIG. 7 is an explanatory diagram of an example of a cross-sectional structure around the light source unit 20 of the lighting fixture 1a according to the first embodiment. FIG. 7(a) shows a state before the light source section 20 is fixed to the front cover section 11 of the cover section 10a. FIG. 7B shows a state in which the light source section 20 is fixed to the front cover section 11 of the cover section 10a. As shown in FIG. 7A, the inner peripheral portion 22a of the packing 22 is formed such that the thickness dimension gradually decreases toward the inner peripheral side. That is, the inner peripheral portion 22a of the packing 22 has an inclined surface 22f. The inclined surface 22f of the packing 22 shown in FIG. 7(a) is an inclined surface facing the packing arrangement surface 10c. Even with such a packing 22, the inner peripheral side tip portion 22c of the inner peripheral portion 22a is formed so as to become thinner toward the inner peripheral side. Therefore, as shown in FIG. 7B, the inner peripheral portion 22a of the packing 22 can be prevented from partially protruding from the outlet 14 when compressed and deformed.

<Main Unit 60>
As shown in FIG. 2, the body unit 60 includes a bottomed cylindrical body structure 60a extending along the optical axis L. As shown in FIG. The body structure portion 60a has a bottomed cylindrical opening facing the cover portion 10a. One surface of the body structure portion 60a is fixed to the attached portion, and the cover portion 10a is attached to the other surface. The cover portion 10a is attached to the main body structural portion 60a so as to cover the other surface side of the main body unit 60. As shown in FIG. Note that the cylindrical portion 60b forming the side surface of the body structure portion 60a is shorter than the cover portion 10a. A cover portion mounting member 61a that protrudes toward the cover portion 10a is installed inside the cylindrical portion 60b of the main body structural portion 60a. Two cover portion mounting members 61a are installed, and a pair of cover portion mounting members 61a are arranged so as to sandwich the lighting device 30 fixed to the central portion of the main body structural portion 60a.

The cover portion mounting member 61a has a U-shaped cross section perpendicular to the optical axis L. As shown in FIG. A mounting surface 61b provided parallel to the bottom surface 10e of the cover portion 10a is formed at the tip of the cover portion mounting member 61a on the side of the cover portion 10a. A screw hole 61c is formed in the mounting surface 61b.

A mounting surface 61b formed at the tip of the cover section mounting member 61a and the bottom surface 10e of the cover section 10a are fastened with screws 10-1. A screw packing is sandwiched between the mounting surface 61b and the bottom surface 10e of the cover portion 10a, and the screw 10-1 is screwed into a threaded hole 61c formed in the mounting surface 61b through the screw packing. With this configuration, the cover portion 10a is pulled toward the main unit 60 and fixed.

<Guide bracket 12>
FIG. 8 is an explanatory diagram of a cross-sectional structure perpendicular to the optical axis L of the lighting fixture 1a according to the first embodiment. FIG. 8 shows a cross section taken along line BB of FIG. In the cross section of FIG. 8, the cover portion mounting member 61a is combined with the guide fitting 12. As shown in FIG. The cover portion mounting member 61a is formed in a substantially rectangular parallelepiped shape with one surface open, and has a U-shaped cross-section opening outward. Further, the guide fitting 12 includes two plate-like guide portions 12b extending toward the inside of the cover portion 10a from both ends of the plate-like joint portion 12a along the inner peripheral surface of the cover portion 10a. In other words, the guide fitting 12 also has a U-shape opening toward the inside of the cover portion 10a in the cross section shown in FIG. The guide portion 12b is positioned so as to sandwich the cover portion mounting member 61a from the outside from the side where the two side portions 61d are positioned.

The guide portion 12b of the guide fitting 12 and the two side portions 61d of the cover portion mounting member 61a are positioned with a slight gap in the assembled state of the lighting device 1a. This configuration determines the rotational position of the cover portion 10 a around the optical axis L of the main unit 60 . The guide fitting 12 and the cover portion mounting member 61a are fitted together so as to be slidable along the direction of the optical axis L, that is, along the direction in which the cover portion 10a is attached to the main unit 60. As shown in FIG. Therefore, the cover portion 10a is easily guided to a position where it can be attached to the main unit 60 while being positioned with respect to the main unit 60 in the rotational direction.

As shown in FIG. 2, the guide metal fitting 12 has a wide interval between the two guide portions 12b at the end on the main unit 60 side, and a narrow interval between the two guide portions 12b at the bottom surface 10e side of the cover portion 10a. It is formed to be That is, the inner side surface 12c of the guide portion 12b is inclined with respect to the optical axis L. As shown in FIG. Further, the guide fitting 12 is arranged at a position near the opening 16 of the cover portion 10 a and not in contact with the main unit 60 . With this configuration, when the cover portion 10a and the main unit 60 are combined, the guide fitting 12 is guided by the cover portion mounting member 61a. Therefore, it is easy to align the cover portion 10a and the main unit 60, and the lighting fixture 1a is easy to assemble.

It is difficult to visually confirm the position of the guide fitting 12 from the outside of the cover portion 10a. In particular, when the cover portion 10a is lifted and attached to the main unit 60 attached to the ceiling, confirmation of the position of the guide fitting 12 becomes even more difficult. In order to solve this problem, a marking indicating the position of the guide fitting 12 may be displayed on the outer surface of the cover side surface portion 13 of the cover portion 10a. The marking may be stamped by pressing or the like, or may be provided by sticking a seal.

When attaching the cover portion 10a, the cover portion 10a is pushed up toward the main unit 60 while aligning the marking of the cover portion 10a with the tip of the cover portion attachment member 61a. As a result, the positions of the cover portion 10a and the main unit 60 can be easily confirmed without looking into the position of the guide metal fitting 12 from the side of the opening 16 of the cover portion 10a or touching the guide metal fitting 12 to confirm the position of the guide metal fitting 12. Alignment becomes possible.

FIG. 9 shows a modification of the guide fitting 12 of the lighting fixture 1a according to the first embodiment. The guide metal fitting 12 may be configured to be guided along the inner surface of the cover portion mounting member 61a which is formed to have a U-shaped cross section. In other words, the cover mounting member 61 a has a groove 62 for guiding the guide metal fitting 12 , and is fitted with the guide metal fitting 12 so that the guide portion 12 d is positioned inside the groove portion 62 . At this time, the mounting surface 61b provided at the tip of the cover portion mounting member 61a is formed to extend in the direction in which the optical axis L is positioned. In other words, the mounting surface 61b is positioned closer to the optical axis L than the groove 62 in the direction along the optical axis L. As shown in FIG. In Embodiment 1, the viewpoint in the direction along the optical axis L is the same as the viewpoint in the central axis direction of the lighting fixture 1a or the cover portion 10a. Thus, the cover mounting member 61a is configured such that the guide fitting 12 can be introduced into the groove 62 from the tip end side. Also, the distance between the two guide portions 12b is preferably formed so that the opening portion 16 side of the cover portion 10a is narrower and the bottom surface 10e side of the cover portion 10a is wider.

<Effect of the lighting device 1a>
As described above, the lighting fixture 1a according to Embodiment 1 includes the light source unit 20 having the light source 5 and the optical control member 21 covering the light source 5, and the light source unit 20 fixed to the exit opening exposing the optical control member 21. and a packing 22 sandwiched between the light source unit 20 and the cover unit 20b and arranged around the emission port 14. As shown in FIG. The packing 22 is formed in an annular shape, and the thickness of at least the inner peripheral portion 22a of the packing 22 is formed so as to decrease from the outer peripheral side to the inner peripheral side.
With this configuration, the packing 22 of the lighting device 1a can be prevented from protruding from the exit port 14, and the optical characteristics of the light emitted from the optical control member 21 and the aesthetic appearance of the lighting device 1a are not deteriorated. In addition, since the thickness of the inner peripheral portion 22a of the packing 22 is formed so as to decrease from the outer peripheral side to the inner peripheral side, concentration of stress on the inner peripheral portion 22a due to being pressed can be alleviated. can be done. Furthermore, since local deformation of the packing 22 can be suppressed, gaps are less likely to occur between the packing 22, the optical control member 21, and the packing placement surface 10c. And waterproofness can be improved.

Further, according to the lighting fixture 1a according to Embodiment 1, the optical control member 21 includes the optical control portion 21a projecting in the direction of the optical axis L of the light emitted from the light source 5, and the optical control portion 21a projecting outward from the optical axis L. and a brim portion 21b formed to protrude. The inner peripheral portion 22a of the packing 22 is sandwiched and compressed between the collar portion 21b and the cover portion 10a.
With this configuration, the inner peripheral portion 22a of the annular packing 22 is sandwiched and compressed over the entire circumference between the optical control portion 21a and the cover portion 10a. Therefore, the inner peripheral portion 22 a of the packing 22 blocks the path from the outside of the lighting fixture 1 a to the interior of the lighting fixture 1 a through the outlet 14 . Therefore, the airtightness and waterproofness inside the lighting device 1a are improved.

The light source unit 20 also includes a holder 9 to which the light source 5 and the optical control member 21 are fixed. The outer peripheral portion 22d of the packing 22 is sandwiched and compressed between the holder 9 and the cover portion 10a.
With this configuration, since the outer peripheral portion of the packing 22 closes the gap between the holder 9 and the cover portion 10a, the airtightness and waterproofness of the interior of the lighting device 1a are improved.

Further, the cover portion 10a is formed with a step around the outlet 14, and the packing 22 is arranged inside the step.
This configuration facilitates the positioning of the packing 22 and improves the positioning accuracy of the packing 22 with respect to the optical control member 21 . Therefore, the packing 22 is arranged at a predetermined position between the light source section 20 and the cover section 10a, and can properly close the gap between the light source section 20 and the cover section 10a. The airtightness and waterproofness inside the lighting device 1a are improved.

Further, the cover portion 10a is formed in a cylindrical shape with a bottom, the emission port 14 is provided on the bottom surface 10e, and the light source portion 20 is fixed to the bottom surface 10e inside the cover portion 10a.
With this configuration, the lighting device 1a closes the gap between the light source unit 20 and the cover unit 10a, thereby easily improving the airtightness and waterproofness of the bottomed cylindrical cover unit 10a. can be done.

A lighting fixture 1a according to Embodiment 1 includes a cover portion 10a provided with a light source, a main body unit 60 having one surface attached to a mounting portion and the other open surface, and the other side of the main unit 60. A cover portion mounting member 61a is provided so as to protrude from the surface side, and the cover portion 10a is fixed to the tip thereof. The cover portion 10a includes a cylindrical cover side portion 13 and a bottom surface 10e having an emission port 14 through which light from the light source 5 is emitted. It is attached to the main unit 60 along the central axis of the cover side portion 13 so as to cover the other surface of the main unit 60 . The cover side portion 13 includes a guide fitting 12 projecting inwardly of the cover portion 10a fixed to the inner peripheral surface. The guide fitting 12 is fitted to the cover portion mounting member 61 a and is configured to be slidable in the direction along the central axis of the cover side portion 13 .
With such a configuration, the cover portion 10a can be easily positioned in the rotational direction about the optical axis L with respect to the main unit 60. As shown in FIG. Therefore, it is possible to suppress the twisting of the electric wire connecting between the cover assembly 10 and the main unit 60, so that the lighting fixture 1a can suppress disconnection and poor connection of the electric wire.

Further, the guide fitting 12 includes two guide portions 12b extending from the inner surface of the cover side portion 13 toward the inside of the cover portion 10a in a cross section perpendicular to the central axis of the cover side portion 13. As shown in FIG. The cover portion mounting member 61a is located between the two guide portions 12b.
Further, the distance between the two guide portions 12b is wide on the side of the main unit 60 and narrow on the side of the bottom surface 10e.
Alternatively, the guide fitting 12 includes a guide portion 12b extending from the inner surface of the cover side portion 13 toward the inside of the cover portion 10a in a cross section perpendicular to the central axis of the cover side portion 13. As shown in FIG. The cover mounting member 61 a includes a groove 62 that opens toward the inner surface of the cover side surface 13 in a cross section perpendicular to the central axis of the cover side surface 13 . The guide portion 12 b is positioned inside the groove portion 62 . The cover portion mounting member 61a has a mounting surface 61b at the tip to which the cover portion 10a is fixed. The mounting surface 61 b is located closer to the central axis than the groove 62 when viewed from the central axis direction of the cover side surface portion 13 .
As described above, the guide using the guide fitting 12 and the cover portion mounting member 61a can take other forms as required. In other words, in the lighting device 1a, the shapes of the guide fitting 12 and the cover portion mounting member 61a are changed according to the arrangement of the fixing portion between the cover portion 10a and the cover portion mounting member 61a, and the arrangement of the lighting device 30 or the light source portion 20 inside. You can change it.

Also, the cover portion 10a may have a marking indicating the position of the guide fitting 12 on its external surface. This facilitates alignment between the body unit 60 and the cover portion 10a of the lighting device 1a, thereby improving assembly workability.

1a lighting fixture, 5 light source, 9 holder, 9a engaging portion, 9b L-shaped rib, 10 cover assembly, 10-1 screw, 10-3 screw, 10a cover portion, 10b surface, 10c packing arrangement surface, 10d connection surface , 10e bottom surface, 11 cover front surface, 12 guide fitting, 12a joint, 12b guide, 12c inner surface, 12d guide, 13 cover side, 14 exit, 15 display, 16 opening, 20 light source, 20b cover portion, 21 optical control member, 21a optical control portion, 21b collar portion, 22 packing, 22a inner peripheral portion, 22b thick portion, 22c inner peripheral tip portion, 22d outer peripheral portion, 22e connecting portion, 22f inclined surface, 23 monitor packing, 27 heat sink, 30 lighting device, 40 power terminal block, 50 housing, 60 main unit, 60a main body structure, 60b cylinder, 61a cover mounting member, 61b mounting surface, 61c screw hole, 61d side surface Part 80 Top surface 90 Waterproof packing 101a Lighting fixture 110 Cover assembly 110a Cover part 122 Packing 122a Inner peripheral part L Optical axis.

Claims (4)

a light source, and a light source unit having an optical control member for controlling the traveling direction and range of light rays emitted from the light source;
a radiator plate to which the light source unit is attached on one side;
a cover portion containing the light source portion and having an exit opening for exposing the optical control member;
a packing disposed between the light source and the cover;
a screw that presses and fixes the packing by pulling the heat sink toward the cover portion,
lighting equipment. further comprising a monitor packing disposed between the heat sink and the cover,
The screw is
fixing the monitor packing so as to press it by pulling the radiator plate toward the cover portion;
A lighting fixture according to claim 1 . The packing is
3. The luminaire according to claim 1, wherein the luminaire is formed in an annular shape and arranged so as to surround the optical control portion, which is the projecting portion of the optical control member. The light source unit
a holder to which the light source and the optical control member are attached;
The holder is
The luminaire according to any one of claims 1 to 3, which is fixed by engaging with the heat sink.

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