JP7394304B2 - lighting equipment - Google Patents

Description

The present disclosure relates to a lighting device.

Patent Document 1 discloses a lighting device in which a bellows-shaped waterproof cover is attached between a light source unit (main body) that houses a light source inside a cylindrical part and an annular base frame (frame body) that is attached to an installation wall. is disclosed. The light source unit is rotatably attached to the base frame about a horizontal axis. A conical cylindrical reflector is arranged inside the base frame, and the upper end of the reflector is fixed to the base frame.

Japanese Patent Application Publication No. 2018-125161

In the configuration described in Patent Document 1, the waterproof cover is omitted, the rotation range of the main body with respect to the frame is restricted, and a light shield is provided above the reflector to prevent light leakage from between the main body and the frame. It is possible to form a wall. Furthermore, it is conceivable to form a plurality of protrusions extending in the vertical direction on the inner surface of the light shielding wall in order to suppress reflection of light toward the light output side of the illumination device so as to be lined up in the circumferential direction. However, in such a configuration, the light emitted from the light source passes through the groove between the protrusions, resulting in glare, which is non-uniform illuminance due to the light emitted from the lighting device.

The illumination device of the present disclosure has a main body rotatably supported by a frame, and has a light shielding wall for preventing light leakage, and aims to suppress glare caused by light emitted from the illumination device.

A lighting device that is an aspect of the present disclosure includes a main body including a cylindrical portion and a light source attached to the inside of the cylindrical portion, and a main body that is disposed below the main body, supports a rotation axis of the main body, and supports a rotation axis of the main body. A frame that rotatably holds the main body at the center and has a guide hole that limits the range of rotation of the main body, and a cylindrical auxiliary reflector that is fixed to the frame. and an auxiliary reflector that prevents light from the light source from leaking between the guide holes. The rotation of the main body is restricted within a predetermined range until the main body tilts to one side at a predetermined maximum angle of 90 degrees or less, and on the upper side of the auxiliary reflector, a light source section is placed on the opposite side to the side where the main body is tilted with respect to the upright state. A light-shielding wall is formed to prevent light leakage from the light-shielding wall. A plurality of protrusions each having a lower surface are formed side by side in the vertical direction.

According to the lighting device that is one aspect of the present disclosure, the main body is rotatably supported on the frame, and has a light-shielding wall for preventing light leakage, and the plurality of protrusions formed on the light-shielding wall , glare caused by light emitted from the lighting device can be suppressed.

FIG. 2 is a perspective view of a lighting device according to an example of an embodiment, viewed from above. FIG. 2 is a perspective view of the illumination device of FIG. 1 seen from below. FIG. 2 is a front view of the lighting device of FIG. 1; FIG. 2 is a cross-sectional view of the illumination device of FIG. 1 taken along a cut plane including the optical axis direction. FIG. 5 is an enlarged view showing the lower part of FIG. 4 with some parts omitted. FIG. 2 is an exploded perspective view of the lighting device of FIG. 1; FIG. 2 is a perspective view showing an auxiliary reflector taken out from the illumination device of FIG. 1; 8 is a sectional view taken along line AA in FIG. 7. FIG. 9 is an enlarged view of part B in FIG. 8. FIG.

Hereinafter, an example of an embodiment of a 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 embodiments are schematically described, the dimensional ratio of each component should be determined with reference to the following description. In the following description, specific shapes, materials, quantities, etc. are illustrative to facilitate understanding of the present disclosure, and can be changed as appropriate according to the specifications of the lighting device. In the following description, similar elements are designated by the same reference numerals in all drawings.

FIG. 1 is a perspective view of a lighting device 10 according to an example of an embodiment, viewed from above. FIG. 2 is a perspective view of the lighting device 10 viewed from below. FIG. 3 is a front view of the lighting device 10. FIG. 4 is a cross-sectional view of the illumination device 10 along a cut plane including the optical axis direction. FIG. 5 is an enlarged view of the lower part of FIG. 4 with some parts omitted. FIG. 6 is an exploded perspective view of the lighting device 10.

As shown in FIGS. 1 to 6, the lighting device 10 includes a main body 11, a frame 60 disposed below the main body 11, and an auxiliary reflector 90 (FIG. 2). The main body 11 includes a housing 12, a light emitting module 40 (FIGS. 5 and 6), and an optical unit 50 (FIGS. 4 and 5). The light emitting module 40 corresponds to a light source section.

The lighting device 10 is a recessed lighting fixture such as a downlight, and is installed by being embedded in a mounting hole provided in a part to be installed, such as a ceiling of a building, and irradiates light downward. In this specification, for convenience of explanation, when the lighting device 10 is attached to a ceiling, the vertically upper side of the lighting device 10 will be referred to as "upper", and the vertically lower side will be referred to as "lower".

The housing 12 has a cylindrical portion 14 with a bottom, and functions as a mounting base for mounting the light emitting module 40 inside the cylindrical portion 14 . Thereby, the light emitting module 40 is fixed within the housing 12. The housing 12 is formed by integrally fixing an upper fin forming member 13 and a lower cylindrical portion 14. The fin forming member 13 is formed by a plurality of fins 13b protruding above the bottom portion 13a. The entire housing 12 also functions as a heat sink for dissipating heat generated by the light emitting module 40, and in particular, the fins 13b dissipate the heat from the light emitting module 40 to the outside air. Therefore, the housing 12 can be made of a material with high thermal conductivity, such as a metal material. The cylindrical portion 14 is formed by fixing a substantially cylindrical support base 14b to the lower side of a substantially cylindrical mounting base 14a. The inner surfaces of the mounting base 14a and the support base 14b can be made black to suppress reflection of light. In this embodiment, "making the inner surface black" means applying black paint to the inner surface of the member, but the present disclosure is not limited thereto. For example, the inner surface of the member may be made black by forming the member from a black material. Note that the main body 11 may be configured without the fins 13b.

The frame body 60 includes a frame body 61, a spring support member 70, and an optical axis adjustment member 80. The frame main body 61 is a cylindrical member, and has a hat shape in which a cylindrical portion 63 is connected to the upper side of a disk portion 62. The frame body 61 is made of a metal material such as aluminum, for example. The frame main body 61 may be formed of a resin material. Attachment springs 67 are coupled to a plurality of circumferential positions on the outer circumferential side of the cylindrical portion 63 .

The attachment spring 67 is used to attach the lighting device 10 to an attachment target such as a ceiling. The mounting spring 67 is a plate-like member formed using a metal material such as iron, and includes a support plate portion 67a extending in the vertical direction and extending outward in a substantially radial direction of the frame main body 61 from the lower end of the support plate portion 67a. It has an arm portion 67b and is formed into a substantially N-shape. The attachment spring 67 is inserted into a U-shaped attachment portion 71 of a spring support member 70 fixed to the frame body 61 and fixed to the frame body 61. The mounting spring 67 is elastically deformed so that the upper ends of the plurality of mounting springs 67 are close to each other, and is inserted into the mounting hole of the mounted part, and then the mounting spring 67 is elastically returned to form the mounting hole of the mounted part. Lock it around the periphery by pressing it from above. Thereby, the lighting device 10 is attached to the attached part with the frame 61 embedded in the attached part. The structure for attaching the lighting device 10 to the attached part may be any structure, and does not need to include a mounting spring.

The housing 12 is supported by the frame 60 so that the optical axis can be adjusted by an optical axis adjustment member 80. In this specification, unless otherwise specified, the term "optical axis" refers to the optical axis of the lens 51 (FIG. 5). Moreover, in this embodiment, the optical axis and the optical axis of the light emitting module 40 coincide. As shown in FIG. 6, the optical axis adjustment member 80 includes a disk portion 81, a first plate portion 82, and two second plate portions 83. The first plate portion 82 and the two second plate portions 83 protrude upward from three positions spaced apart in the circumferential direction of the disk portion 81. A disk portion 72 of a spring support member 70 is coupled to the upper end of the cylindrical portion 63 of the frame main body 61, and a disk portion 81 of the optical axis adjustment member 80 is sandwiched between the disk portion 72 and the upper end surface of the cylindrical portion 63. In this state, the disk portion 72 is fixed to the upper end surface of the cylindrical portion 63 with screws 87. Note that in FIG. 6, the vertical positional relationship between the optical axis adjustment member 80 and the spring support member 70 is reversed from the actual position.

The first plate portion 82 of the optical axis adjustment member 80 has a long hole 85 on the upper side and a circular hole (not shown) through which a screw 86 passes on the lower side. The optical axis adjustment member 80 is screwed to the housing 12 with a screw 16 using an elongated hole 85 and screwed to the housing 12 with a screw 86 passing through a circular hole. The elongated hole 85 corresponds to a guide hole that limits the rotation range of the main body 11 relative to the frame 60.

Two plate springs 88 as elastic members are fixed to one of the two second plate parts 83 (on the right side in FIG. 6) and the first plate part 82. As shown in FIG. The leaf spring 88 has a substantially V-shaped cross section, and one end portion protrudes inward in the radial direction of the disc portion 81 . The two leaf springs 88 are arranged at positions on the optical axis adjustment member 80 that are out of phase by approximately 180 degrees. One end side portions of the two leaf springs 88 are pressed against the outer peripheral surface of an auxiliary reflecting plate 90, which will be described later. Thereby, the auxiliary reflection plate 90 is fixed to the frame 60.

As shown in FIG. 1, in a state in which the extending direction of the central axis O1 of the frame 60 substantially coincides with the vertical direction, and the central axis O2 of the main body 11, which coincides with the optical axis, substantially coincides with the vertical direction, the housing 12 is fixed to one end of the elongated hole 85 (the left end in FIG. 1) with a screw 16. This state is an upright state in which the central axis O2 of the main body 11 and the central axis O1 of the frame body 60 are substantially parallel. With the frame body 60 fixed in the mounting hole of the mounted part using the mounting spring 67, the user applies a force greater than the static friction force generated due to the tightening force of the screw 16 to the first plate part 82 to the housing. Suppose that it is given to the body 12. Then, the housing 12 is moved relative to the optical axis adjustment member 80 so that the screw 16 moves inside the long hole 85 to the other side of the long hole 85 (to the right side in FIG. 1) using the screw 86 as the rotation axis of the main body 11. and rotate. As a result, the optical axis adjustment member 80 is fixed to the main body 11 so as to be immovable relative to the main body 11 in a state where the main body 11 is inclined with respect to the frame body 60. Therefore, the frame 60 supports the screw 86 that is the rotational axis of the main body 11, and holds the main body 11 rotatably about the screw 86. Further, the elongated hole 85 is formed at a predetermined maximum angle α of 90 degrees or less (Fig. 3), the rotation of the main body 11 is limited within a predetermined range until it tilts to one side. The position of the outer shape of the main body 11 shown by the two-dot chain line in FIGS. 3 and 4 indicates that the main body 11 is inclined to one side at a predetermined maximum angle α with respect to the upright state.

Therefore, after the user fixes the illumination device 10 in the mounting hole of the attached part, the user can adjust the main body 11 to be tilted at a desired angle within the predetermined maximum angle α with respect to the frame 60, and the optical axis can be adjusted vertically. It can be tilted at a desired angle with respect to the direction. As a result, the degree of freedom in the irradiation area can be increased.

As shown in FIGS. 5 and 6, the light emitting module 40 is fixed to a substrate holder 41. The substrate holder 41 holds the substrate 42 of the light emitting module 40. The substrate holder 41 is fixed to the lower surface of the bottom portion 13a of the fin forming member 13 by a holder fixing member. The light emitting module 40 includes a flat substrate 42 that is rectangular in plan view, and a light source main body 43 disposed approximately at the center of the lower surface of the substrate 42. The light emitting module 40 has, for example, a COB (Chip On Board) structure, and the light source body includes a plurality of LEDs (light emitting diodes) mounted on a board and a sealing member that seals the plurality of LEDs.

The substrate 42 is composed of, for example, a ceramic substrate, a resin substrate, a metal base substrate, or the like. A pair of electrode terminals and a predetermined pattern of metal wiring are formed on the substrate 42 . The pair of electrode terminals are provided to receive DC power from the outside for causing the LED to emit light. Further, a predetermined pattern of metal wiring is provided to electrically connect the LEDs.

For example, the LED is composed of a bare chip that emits monochromatic visible light, and is composed of a blue LED chip that emits blue light when energized. The plurality of LEDs are arranged, for example, in a matrix on the substrate. Note that only one LED may be mounted on the board. The sealing member is made of, for example, a translucent resin and includes a phosphor. The phosphor serves to convert the wavelength of the light from the LED. The sealing member is made of, for example, a phosphor-containing resin in which phosphor particles are dispersed in a silicone resin. The light source main body 43 converts a part of the blue light of the light emitting element into light with a longer wavelength using a phosphor, and emits white light by mixing the color with the remaining part of the blue light.

Note that the sealing member may seal all the LEDs at once, may seal a plurality of LEDs in a line for each row, or may seal each LED individually. . Further, the light source section may include a light emitting element other than an LED, and may be composed of a solid state light emitting element such as a semiconductor laser element, an organic EL (Electro Luminescence) element, or an inorganic EL element. Furthermore, the light source section may be composed of an incandescent lamp, a fluorescent lamp, or the like.

As shown in FIG. 5, the optical unit 50 includes a lens 51 and a cylindrical lens holder 53 disposed on the outer peripheral side of the lens 51 so as to surround the lens 51. The lens 51 is fixed to the lens holder 53. It is formed by

The lens 51 is integrally molded from a transparent resin material such as silicone resin. The lens 51 is a translucent member through which light from the light emitting module 40 is incident. The lens 51 may have a function of controlling the distribution of light passing therethrough and emitting the light. The lens 51 has a Fresnel lens portion 52 on the light exit side (lower side in FIG. 5).

The lens holder 53 is made of a resin material having a higher Shore A hardness than the lens 51, for example. Lens holder 53 may be formed of a metal material such as aluminum. The lens holder 53 has a conical cylindrical shape whose diameter decreases toward the upper end, and a large-diameter cylindrical portion 53a whose diameter increases is formed on the lower side. The large diameter cylindrical portion 53a has an annular holding recess on its inner surface. The upper end of the lens 51 is held in the holding recess. In this state, the outer peripheral portion of the lower end of the lens holder 53 abuts against the flange portion formed on the inner peripheral surface of the lower end portion of the mounting base 14a. Further, the mounting ring 54 is pressed onto the stepped surface 53b formed on the outer circumferential surface of the central axis direction intermediate portion of the lens holder 53, and a screw (not shown) passing through a hole formed in the mounting ring 54 is inserted. The lens holder 53 is fixed to the mount 14a together with the lens 51 by being screwed into a screw hole formed in a protrusion (not shown) protruding from the inner peripheral surface of the mount 14a. Thereby, the lens 51 is arranged on the light emitting side of the light emitting module 40.

With the support base 14b fixed to the lower side of the mounting base 14a, a disc-shaped transparent disc is formed between the lower end of the mounting base 14a and the upper end of the flange formed on the inner peripheral surface of the support base 14b. The outer periphery of the cover 55 is sandwiched. Thereby, the cover 55 is placed on the light exit side of the lens 51. The support stand 14b is formed into a substantially cylindrical shape with a lower end cut out diagonally. More specifically, one side (the right side in FIG. 5) of the lower end of the support base 14b, which is the side in the inclination direction of the housing 12, is inclined upward toward the one end (the right end in FIG. 5). . This prevents interference between the housing 12 and the frame 60 even if the housing 12 is tilted to one side with respect to the frame 60.

An auxiliary reflecting plate 90 is arranged inside the frame 60, and the upper end of the auxiliary reflecting plate 90 is arranged inside the wall 14c of the support base 14b.

FIG. 7 is a perspective view showing the auxiliary reflection plate 90 taken out from the lighting device 10. FIG. 8 is a sectional view taken along line AA in FIG. FIG. 9 is an enlarged view of part B in FIG. 8.

The auxiliary reflector 90 has a cylindrical shape as a whole, and includes a conical cylindrical reflector main body 91 whose diameter becomes wider toward the lower end, and a light shielding wall 93 formed at the upper end of the reflector main body 91. The reflector main body 91 has a shape in which the upper end is cut with a plane inclined with respect to the central axis. More specifically, the upper end of the reflector main body 91 extends downward toward one end (the right end in FIGS. 5 and 7, the left end in FIG. 8) which is the side end in the inclined direction of the housing 12 (FIG. 5). It is sloping. A flange portion 92 is formed on the outer peripheral surface of the lower end of the reflector body 91 .

The light shielding wall 93 has a light emitting module 40 (FIG. 5) located at the upper end of the reflector body 91 on the side opposite to the side where the body 11 is inclined with respect to the upright state (left side in FIGS. 5 and 7, right side in FIG. 8). It is designed to prevent light from leaking from the More specifically, the light shielding wall 93 is formed at an angle of 120 degrees to 180 degrees around the circumferential center P (FIG. 8) on the opposite side to the side where the main body 11 is inclined relative to the upright state at the upper end of the reflector main body 91. It is formed to have an arcuate cross section so as to protrude upward within a degree range. As a result, the angles from the circumferential center P to both ends of the light shielding wall 93 are each in the range of 60 degrees to 90 degrees. The light shielding wall 93 protrudes from the upper end of the reflector body 91 at approximately 180 degrees or less about the circumferential center P on the side opposite to the side where the body 11 is inclined relative to the upright state, that is, the cross section thereof is approximately 180 degrees. More preferably, it protrudes upward in a semicircular shape. In the example of FIG. 7, a short cylindrical portion 95 having a semicircular cross section is formed at the upper end of the reflector body 91 on the side opposite to the light shielding wall 93 in the circumferential direction so as to connect to both ends of the light shielding wall 93 in the circumferential direction. This short cylindrical portion 95 may be omitted.

On the inner surface 93a of the light shielding wall 93, a plurality of circumferentially long protrusions 94 are formed in a line in the vertical direction. Both ends of each protrusion 94 in the circumferential direction reach both end surfaces of the light shielding wall 93 in the circumferential direction. Each protrusion 94 has a substantially triangular cross-section and has an upper surface 94a that is a horizontal surface and a lower surface 94b that is inclined with respect to the upper surface 94a. The lower surface 94b is inclined by a predetermined maximum angle α or more with respect to a plane including the central axis O2 of the main body 11 in the upright state. Thereby, glare caused by the light emitted from the illumination device 10 can be suppressed, as will be described later. Note that the lower surface 94b of the protrusion 94 is not limited to a flat surface, but may be a curved surface that is slightly curved so as to be concave diagonally upward perpendicular to the flat surface. At this time, the tangential plane of the upper portion of the curved surface is inclined by a predetermined maximum angle α or more with respect to the plane containing the central axis of the main body 11 in the upright state. In the present disclosure, the tangential plane of the upper portion of the curved surface is inclined at a predetermined maximum angle α or more with respect to the plane containing the central axis of the main body 11 in the upright state, and the protrusion This means that the lower surface is inclined at a predetermined maximum angle or more with respect to a plane including the central axis of the plane.

In the auxiliary reflector 90, a flange 92 (FIGS. 7 and 8) at the lower end of the reflector main body 91 is fitted into the lower end of the inner peripheral surface of the frame main body 61. Further, in this state, the two leaf springs 88 (FIG. 6) described above are elastically pressed against the outer circumferential surface of the light shielding wall 93. Thereby, the auxiliary reflection plate 90 is fixed to the frame main body 61. In this state, the auxiliary reflector 90 prevents light from the light emitting module 40 (FIGS. 4 and 5) from leaking between the main body 11 and the frame 60. Note that mounting protrusions may be formed at one or more positions on the outer circumferential surface of the auxiliary reflector 90, and the mounting protrusions and the frame 60 may be screwed together, or holes may be formed in the mounting protrusions and the frame 60. The auxiliary reflecting plate 90 may be fixed to the frame body 60 by passing a V-shaped spring through the hole with both ends close together and pressing both sides of the spring into the hole.

The auxiliary reflection plate 90 is formed by injection molding resin. The inner surface 91a of the reflector body 91 is mirror-finished by, for example, aluminum vapor deposition, and is formed as a reflective surface. Thereby, the light from the light emitting module 40 can be well reflected by the inner surface 91a of the reflector main body 91. This inner surface 91a is not limited to being mirror-finished by aluminum vapor deposition. For example, a reflective film such as a metal thin film or a dielectric multilayer film may be formed on the inner surface 91a by a method such as thermal evaporation, electron beam evaporation, sputtering, or plating.

The inner surface 93a of the light shielding wall 93 is black. This makes it possible to suppress the light from the light emitting module 40 from being reflected on the inner surface 93a of the light shielding wall 93, making it easier to control the light emitted from the lighting device 10. Note that the inner surface 93a is not limited to black, and may be another color close to black, such as gray.

According to the lighting device 10 described above, the main body 11 is rotatably supported with respect to the frame 60, and has a light shielding wall 93 for preventing light leakage, and a plurality of protrusions 94 formed on the light shielding wall 93. Therefore, glare caused by the light emitted from the lighting device 10 can be suppressed. For example, since the upper surface 94a of the protrusion 94 is a horizontal surface, light reflected from the upper surface can be returned to the upper side (toward the light emitting module 40 side). Furthermore, since the lower surface 94b is inclined by a predetermined maximum angle α or more with respect to the plane including the central axis O2 of the main body 11 in the upright state, even if the main body 11 is inclined by the predetermined maximum angle α or less with respect to the upright state. , it is possible to suppress the light from the light emitting module 40 from being reflected on the lower surface 94b. Thereby, it is possible to suppress the light from the light emitting module 40 from being reflected by the light shielding wall 93 toward the lower side, which is the light output side, of the illumination device 10 . For example, when the main body 11 is tilted by a predetermined maximum angle α with respect to the upright state, the optical axis also follows the direction tilted by the predetermined maximum angle α, but the lower surface 94b of the protrusion 94 is aligned with the plane containing the central axis O2 of the main body. On the other hand, since it is inclined at a predetermined maximum angle α or more, it is possible to suppress the light from being reflected by the lower surface 94b. This makes it possible to prevent light from being reflected on the inner surface 93a of the light shielding wall 93 toward the light output side of the lighting device 10, making it easier to control the light emitted from the lighting device 10. Furthermore, unlike the case where a plurality of protrusions are formed along the vertical direction on the inner surface 93a of the light shielding wall 93, the light emitted from the light emitting module 40 passes through the grooves between the protrusions 94, so that the light emitted from the lighting device 10 It is possible to suppress the occurrence of glare caused by uneven illuminance. Therefore, glare caused by the light emitted from the lighting device 10 can be suppressed, and the light emitted from the lighting device 10 can be easily controlled.

Furthermore, in the case where protrusions are formed on the outer surface of the light-shielding wall 93, even when the auxiliary reflection plate 90 is formed of resin, the plurality of protrusions 94 are formed on the inner surface of the light-shielding wall 93, so that the light-shielding wall It is possible to make sink marks that occur on the inner surface 93a of 93 less noticeable.

Furthermore, the light shielding wall 93 is formed within a range of 120 degrees to 180 degrees around the circumferential center P on the side opposite to the side where the main body 11 is inclined with respect to the upright state of the auxiliary reflecting plate 90. As a result, unlike the case where the light shielding wall 93 is formed over 180 degrees around the center in the circumferential direction on the side opposite to the side where the main body 11 is inclined with respect to the upright state in the auxiliary reflector 90, the light shielding wall 93 is auxiliary with resin. The mold (slide mold) for molding the reflecting plate 90 can be easily removed in the direction opposite to the light shielding wall 93 in the circumferential direction. Therefore, deterioration in moldability of the auxiliary reflecting plate 90 can be suppressed. Further, unlike the case where the light shielding wall 93 is formed at an angle of less than 120 degrees around the center in the circumferential direction on the side opposite to the side where the main body 11 is inclined with respect to the upright state, the light shielding wall 93 is formed at an angle of less than 120 degrees in the auxiliary reflector 90. The light blocking effect of the light blocking wall 93 can be enhanced.

In addition, in each of the above examples, the case where the lighting device is used as a recessed lighting fixture such as a downlight is explained, but the lighting device may be suspended from a rail or from a ceiling. . Further, the lighting device of the present disclosure may be a spotlight. When the illumination device of the present disclosure is a downlight or a spotlight, downlights and spotlights have a wide variety of structures, and the technology of the present disclosure can be applied to any of these various downlights and spotlights. Either structure may be the basic structure.

Reference Signs List 10 lighting device, 11 main body, 12 housing, 13 fin forming member, 13a bottom, 13b fin, 14 tube, 14a mounting base, 14b support base, 14c wall, 16 screw, 40 light emitting module, 41 substrate holder, 42 Substrate, 43 Light source body, 50 Optical unit, 51 Lens, 53 Lens holder, 54 Attachment ring, 55 Cover, 60 Frame body, 61 Frame body body, 62 Disc part, 63 Cylindrical part, 67 Attachment spring, 70 Spring support member , 71 attachment part, 80 optical axis adjustment member, 81 disc part, 82 first plate part, 83 second plate part, 85 long hole, 86, 87 screw, 88 plate spring, 90 auxiliary reflector, 91 reflector main body , 91a inner surface, 92 flange, 93 light-shielding wall, 93a inner surface, 94 protrusion, 94a upper surface, 94b lower surface, 95 short cylindrical portion.

Claims (3)

a main body having a cylindrical portion and a light source attached to the inside of the cylindrical portion;
A frame body disposed below the main body, supporting a rotation axis of the main body, and holding the main body rotatably about the rotation axis, the frame body having a guide hole that limits the rotation range of the main body. A frame and
a cylindrical auxiliary reflection plate fixed to the frame, and an auxiliary reflection plate that prevents light from the light source section from leaking between the main body and the frame;
The guide hole is formed in a predetermined range from an upright state where the central axes of the main body and the frame are parallel to a state where the central axis of the main body is inclined to one side at a predetermined maximum angle of 90 degrees or less with respect to the upright state. restricting the rotation of the body within a range;
A light shielding wall is formed on the upper side of the auxiliary reflector plate, on the side opposite to the side where the main body is inclined with respect to the upright state, so as to prevent light from leaking from the light source part,
The light-shielding wall is a wall whose cross-sectional shape perpendicular to the vertical direction is an arcuate shape and whose upper end is a horizontal surface,
A plurality of protrusions are lined up and down on the inner surface of the light-shielding wall, each having an upper surface that is a horizontal surface and a lower surface that is inclined at an angle greater than or equal to the predetermined maximum angle with respect to a plane that includes a central axis of the main body in the upright state. is formed,
lighting equipment. The lighting device according to claim 1,
The light shielding wall is formed within a range of 120 degrees to 180 degrees around the center in the circumferential direction of the auxiliary reflecting plate on the opposite side to the side where the main body is inclined with respect to the upright state.
lighting equipment. The lighting device according to claim 1 or 2,
The inner surface of the light shielding wall is black.
lighting equipment.

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