JP6356016B2 - Lighting fixture body and lighting fixture - Google Patents

Description

  The present invention relates to a lighting apparatus that is embedded in a ceiling surface and illuminates a wall surface.

  Patent Document 1 discloses a wall washer-type lighting fixture.

  This luminaire has a lamp as a light source and a reflector that reflects light from the lamp, and is mounted so that the entirety is embedded in the ceiling surface. The reflector is disposed so as to be inclined so that its axial center faces the wall surface. Further, the reflector is formed into a spheroidal surface obtained by rotating a part of an ellipse around an axis. Further, in this ellipse, two focal points are arranged on the axis, the upper focal point coincides with the lamp, and the lower focal point is arranged near the ceiling surface.

  In this lighting fixture, the light emitted from the lamp (upper focal point) is reflected by the reflector, passes through the lower focal point, travels substantially parallel to the ceiling surface, and irradiates the ceiling of the wall surface. be able to.

  Furthermore, the lighting fixture has a reflecting plate on the side close to the wall surface of the holder. The reflecting plate is formed to be bent so that the center side bulges upward, and the bottom surface side is formed as a mirror surface to be a reflecting surface. This reflecting surface reflects the diffused light, etc. deviated from the irradiation direction parallel to the ceiling plate by diffusion out of the light reflected by the concave surface of the reflector near the lower end opening edge, so that The brightness in the direct downward direction is increased.

JP 2011-40299 A

However, when the wall surface is mainly irradiated by the lighting fixture installed so as to be embedded in the ceiling surface as described above, the upper portion of the wall surface is relatively close to the lighting fixture, but the intermediate portion, further the lower portion, the floor surface. , The distance from the luminaire becomes longer. For this reason, if it is attempted to irradiate uniformly from the upper part of the wall surface to the lower part, and further to the floor surface by the lighting fixture, it is necessary to considerably increase the amount of light directed to the intermediate part, further to the lower part, and the floor surface compared to the upper part .
On the other hand, in the above-mentioned lighting fixture, the brightness in the direct lower direction of the lighting fixture is increased by providing the reflection surface as described above.
For this reason, depending on the shape of the reflecting surface, the brightness may not be increased sufficiently.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a luminaire main body and a luminaire that can sufficiently increase the brightness below the luminaire with light having high controllability. And

  The invention according to claim 1 is a lighting fixture body that is used by being embedded in a ceiling surface in a posture in which the central axis is directed in the vertical direction, and is formed into a planar light source having a light emitting surface and a bowl shape centered on the axis. A reflector formed so as to cover a lower portion of the light emitting surface, and a holding member that holds the reflector, the holding member being closer to the wall surface than the axis, And a parabolic reflecting surface obtained by rotating a part of a parabola located in the same plane as the above.

According to a second aspect of the present invention, in the luminaire main body according to the first aspect, the rotating paraboloid obtained by rotating the reflecting surface around a rotation axis located in the same plane as a part of the parabola. The rotation axis is formed between the α and γ, where α is the inclination angle of the axial center with respect to the central axis, and γ is the inclination angle of the rotation axis with respect to the central axis.
0 ≦ γ ≦ α
It is set so that is satisfied.
According to a third aspect of the present invention, in the luminaire main body according to the second aspect, the reflecting surface has a focal point disposed on the rotation axis.

  According to a fourth aspect of the present invention, in the luminaire main body according to the second or third aspect, a diffusing plate is provided between the reflector and the reflecting surface, and the reflecting surface is a light diffused by the diffusing plate. The portion is reflected toward the direction of the rotation axis.

  According to a fifth aspect of the present invention, there is provided a lighting fixture comprising: a main body fixture fixed to a mounting hole drilled in a ceiling surface; and a lighting fixture main body detachable from the main body fixture. The fixture main body is a lighting fixture main body according to any one of claims 1 to 4.

  According to the invention of claim 1, since the holding member has a rotary parabolic reflecting surface on the side closer to the wall surface than the axis, the luminaire main body reflects reflected light from the reflector, The reflected light from this reflecting surface can be added, and the controllability of the irradiation light can be improved accordingly.

According to the invention of claim 2, the reflecting surface can set the direction in which the reflected light is directed within this range by setting the inclination angle γ of the rotation axis so as to satisfy 0 ≦ γ ≦ α. it can.
According to invention of Claim 3, the reflective surface can reflect the light which passed the focus toward the rotation axis direction.

  According to the invention of claim 4, even when the reflection surface cannot directly receive the reflected light from the reflector, it can receive the light from the diffusion plate and reflect it.

  According to the fifth aspect of the present invention, the effect of the luminaire main body described above can be achieved as a luminaire including a luminaire main body and a main body holder that detachably holds the luminaire main body.

It is a front view of a lighting fixture. It is the XX arrow enlarged view in FIG. FIG. 2 is an exploded view taken along line XX in FIG. 1. It is the disassembled perspective view which looked at the lighting fixture from diagonally downward. FIG. 2 is an enlarged view of a base, a planar light source, a reflector, a diffusion plate, a cover, and a cone as viewed in the direction of arrows X-X in FIG. 1. It is the disassembled perspective view which looked at the reflector, the diffusion plate, the cover, and the cone from diagonally upward. It is the disassembled perspective view which looked at the reflector, the diffusion plate, the cover, and the cone from diagonally downward. It is a figure explaining the optical path of the light inject | emitted from a lighting fixture. It is a figure explaining the optical path of the light inject | emitted from a lighting fixture, and an irradiation range.

Hereinafter, embodiments to which the present invention is applied will be described in detail with reference to the drawings. In addition, in each drawing, the member etc. which attached | subjected the same code | symbol are the things of the same or similar structure, The duplication description about these shall be abbreviate | omitted suitably. Moreover, in each drawing, members and the like that are not necessary for the description are omitted as appropriate.
<Embodiment 1>
The lighting fixture 1, the lighting fixture main body 20, and the reflector 80 which concern on Embodiment 1 to which this invention is applied with reference to FIGS. 1-9 are demonstrated.
First, with reference to FIGS. 1-4, the schematic structure of the lighting fixture 1 is demonstrated.

Among these, FIG. 1 is a front view of the lighting fixture 1. FIG. 2 is an enlarged view taken along line XX in FIG. That is, it is a cross section cut along a plane that includes the central axis C0 of the luminaire main body 20 and is orthogonal to the wall surface W. Note that an axis C1, a straight line C2, and a rotation axis C3, which will be described later, are placed (positioned) on this plane. FIG. 3 is an exploded view taken along line XX in FIG. FIG. 4 is an exploded perspective view of the luminaire 1 as viewed obliquely from below.
In addition, below, the case where the lighting fixture 1 is what is called a wall washer which mainly irradiates the wall surface W is demonstrated to an example.

  The lighting fixture 1 includes an embedded frame (main body fixture) 10 and a lighting fixture main body 20. Among these, the lighting fixture main body 20 includes a planar light source 70, a reflector 80, and the like.

  The embedded frame 10 includes a cylindrical portion 11, a flange portion 12 at the lower end thereof, two sets of mounting bases 13, three fixing springs 14, and two embedded frame springs 15 (see FIG. 8). Two fixing screws 16 are provided.

  As shown in FIG. 8, the embedded frame 10 has a mounting base in a state where the cylindrical portion 11 is inserted into the mounting hole H formed in the ceiling surface C and the flange portion 12 is abutted against the ceiling surface C. 13 is fixed to the ceiling surface C by an embedded frame spring 15 and a fixing screw 16.

  In this state, the embedded frame 10 is such that a part of the fixing spring 14 protrudes to the inside of the cylindrical portion 11, and this protruding portion engages with a cone 110 described later on the lighting apparatus main body 20 side. The main body 20 is held.

  The luminaire main body 20 includes a socket 30, a body 40, a light source mounting member 50, a base 60, a diffusion plate 90, a cover 100, and a cone (holding member) 110 in addition to the above-described planar light source 70 and reflector 80. These are configured integrally.

Among these, the socket 30 is formed with a large number of cooling fins 31 extending in the radial direction in the circumferential direction. The socket 30 also has a recess 32 that opens downward.
The body 40 includes a tubular portion 41 and a small diameter portion 42 at the upper end of the tubular portion 41.
The light source mounting member 50 includes a cylindrical part 51, a disk part 52 at the lower end of the cylindrical part 51, and a large number of cooling fins 53 erected radially on the upper surface of the disk part 52.

  The light source mounting member 50 is inserted into the body 40 from below, the upper end of the cooling fin 53 is brought into contact with the small diameter portion 42 of the body 40, and the cylindrical portion 51 is protruded from the cylindrical portion 41 of the body 40. Yes. This protruding portion is inserted into the recess 32 of the socket 30. Thus, the cooling fins 53 of the light source mounting member 50 and the cooling fins 31 of the socket 30 are substantially continuous to form a number of cooling air flow paths along the circumferential direction.

The base 60 includes a disk part 61 that is fixed to the disk part 52 of the light source attachment member 50 from below, and an attachment seat 62 that protrudes downward from the disk part 61. The lower surface of the mounting seat 62 is an inclined light source mounting surface 62a as will be described in detail later, and the planar light source 70 is mounted in an inclined posture on the light source mounting surface 62a.
The planar light source 70 is attached to the light source attachment surface 62 a of the base 60.

The reflector 80 is formed in a substantially bowl shape, and is disposed in an inclined posture so as to cover the lower side of the planar light source 70. The opening of the reflector 80 is cut off obliquely, and a diffusion plate 90 is disposed in this opening.
The diffusion plate 90 is formed in a substantially disk shape, is supported by the cover 100, and is fixed by a fixing metal fitting 94.
The cover 100 supports the reflector 80 and the diffusion plate 90 described above from below.
The cone 110 is fixed to the body 40 while supporting the cover 100 and further supporting the reflector 80 and the diffusion plate 90 via the cover 100.

The luminaire main body 20 described above has a substantially cylindrical configuration in which the socket 30 to the cone 110 are combined together. The luminaire main body 20 is attached to the embedded frame 10 by being inserted into the embedded frame 10 from below and the fixing spring 14 of the embedded frame 10 being engaged with the cone 110. At this time, the central axis C0 of the luminaire body 20 is oriented vertically. Above, description about schematic structure of the lighting fixture 1 is finished.
Next, the base 60 to the cone 110 will be described in detail with reference to FIGS. 2 and 5 to 7.

Here, FIG. 2 is an enlarged view taken along line XX in FIG. 1 as described above. FIG. 5 is an enlarged view of the base 60, the planar light source 70, the reflector 80, the diffusion plate 90, the cover 100, and the cone 110 as viewed in the direction of arrows X-X in FIG. FIG. 6 is an exploded perspective view of the reflector 80 to the cone 110 as viewed obliquely from above. FIG. 7 is an exploded perspective view of the reflector 80 to the cone 110 as viewed obliquely from below.
In the present embodiment, the positional relationship between the mounting surface 62a of the planar light source 70 and the reflector 80 is set as shown in FIG.

  That is, the axis C1 of the reflector 80 is inclined at the inclination angle α with respect to the vertical central axis C0 of the lighting fixture body 20. Further, the light emitting surface 72 of the planar light source 70 is inclined at an inclination angle β with respect to the first virtual plane H1 orthogonal to the axis C1. Further, the center O of the light emitting surface 72 is not placed on the central axis C0 but is shifted from the central axis C0. Hereinafter, these points will be described in detail.

  Here, in FIG. 5, the central axis C0 of the luminaire body 20 (see FIG. 2) faces the vertical direction (vertical direction). A plane including the central axis C0 and parallel to the wall surface W is defined as a reference plane H0. Then, with this reference plane H0 as a reference, the side closer to the wall surface W than this is the A side, and conversely, the side farther from the reference plane H0 is the B side. For example, in the case of the A side of the reflector 80, it refers to the side (part) of the reflector 80 that is close to the wall surface. In addition, in the case of the B side of the reflector 80, the side (part) far from the wall surface W of the reflector 80 is meant. The same applies to other members.

  As shown in FIG. 5, the base 60 has a disc portion 61 and a mounting seat 62 projecting downward from the disc portion 61, and the lower surface of the mounting seat 62 has a planar light source 70. The mounting surface 62a is attached. The mounting surface 62a is formed as a flat surface and an inclined surface (an inclined surface) so that the B side is positioned upward.

  The planar light source 70 is a so-called COB (chip on board) type LED module in which a large number of small LED elements are arranged in a planar shape. As such a planar light source 70, for example, a product manufactured by Citizen Electronics Co., Ltd. can be used. This is a circular light emitting device inscribed in a square, for example, by arranging a large number of vertical and horizontal LED elements on a square aluminum substrate 71 and sealing the surface with a silicone resin containing a phosphor. A surface 72 is formed. The planar light source 70 is directly fixed in a state where the substrate 71 is in close contact with the mounting surface 62a of the base 60, and the cooling efficiency is enhanced. The planar light source 70 emits light from each LED element with an irradiation angle of 120 °, and these are collected to form a planar light source.

In the planar light source 70, since the back surface of the substrate 71 that contacts the mounting surface 62a of the base 60 and the light emitting surface 72 are formed in parallel to each other, the inclination angle of the light emitting surface 72 is set to the mounting surface 62a of the base 60. It becomes the same as the inclination angle.
The reflector 80 is formed in a substantially bowl shape centering on the axis C1, and has an opening K1 at the upper end and an opening K2 at the lower end.

The axis C1 of the reflector 80 intersects the central axis C0 of the luminaire main body at an inclination angle α (where 0 <α ≦ 90 degrees). When the plane orthogonal to the axis C1 is the first virtual plane H1, the light emitting surface 72 described above has an inclination angle β (where 0 <β ≦ 90 degrees) with respect to the first virtual plane H1. It is inclined at.
Furthermore, in this embodiment, the light emitting surface 72 and the reflector 80 are between the above-mentioned inclination angles α and β.
α ≦ β ≦ 90 degrees is established.

  By being configured in this way, the light emitting surface 72 is directed to the portion located on the B side in the reflector 80. For this reason, the light quantity which goes to the part located in the B side of the reflector 80 among the light quantity of the light light-emitted from the light emission surface 72 is increased, and the light quantity which is reflected here and goes to the wall surface W can be increased.

  Note that the case where α = β is a case where the light emitting surface 72 is orthogonal to the central axis C0 when α is fixed. Even in this case, the light emitting surface 72 is not aligned with the axis C1. Because of the inclination angle α, the amount of light toward the wall surface W can be increased as described above.

  Further, in the present embodiment, the center O of the light emitting surface 72 is shifted from the center axis C0 of the lighting fixture body 20. As a result, the reflector 80 arranged in an inclined manner is placed within the minimum radius centered on the central axis C0. That is, for example, the portion of the reflector 80 that is located on the A side and that is the farthest from the central axis C0 is the portion M, and similarly, the portion of the reflector 80 that is located on the B side. Of these, if the portion farthest from the central axis C0 is the portion N, the center O of the light emitting surface 72 is the central axis C0 so that the distance from the central axis C0 to the portion M is equal to the distance to the portion N. Try to stagger. As a result, the entire reflector 80 in the inclined posture can be accommodated in a virtual cylindrical space having a minimum radius. That is, useless space can be omitted and space efficiency can be improved.

  The reflector 80 described above has, on the inner peripheral surface, a second parabolic surface on the upper side (side closer to the planar light source 70) on the second virtual plane (virtual plane) H2 orthogonal to the axis C1. 1 is formed, and a second reflecting surface 82 having a spheroidal shape is formed on the lower side (the side far from the planar light source 70).

  The first reflecting surface 81 is a rotating paraboloid obtained by rotating a part of a parabola having a focal point F1 on the straight line C2 around the straight line C2 around the axial center C1 around the straight line C2 parallel to the axial center C1. It is formed in a shape. The focal point F1 is set at the intersection of the light emitting surface 72 with the straight line C2. The focal point F is arranged in a range from r / 4 to 3r / 4 from the center O, for example, about r / 2, where r is the radius of the light emitting surface 72. In addition, when the light emission surface 72 is not circular, for example, in the case of a square, the inscribed circle may be considered.

In the present embodiment, as described above, the light emitting surface 72 of the planar light source 70 is inclined at the inclination angle β with respect to the first virtual plane H1, and the focal point F1 is shifted from the center of the light emitting surface 72. Yes. For this reason, if the focal point F1 is the center O as the origin, the direction perpendicular to the axis C1 through the center O is the x axis, and the direction of the axis C1 is the y axis, the x axis and y It will have an x coordinate (x component) and a y coordinate (y component) along the axis.
Thereby, the reflector 80 can obtain the optical paths Lb and Lb ′ in FIG. 5 that cannot be obtained when the focal point F1 coincides with the center O of the light emitting surface 72.

  That is, as shown in FIG. 5, on the light emitting surface 72, the light traveling from the focal point F <b> 1 and traveling on the optical path La, the light traveling on the inner side (side closer to the axis C <b> 1) than the focal point F <b> 1 and traveling on the optical path Lb It is assumed that light that travels from the outer side than F1 (the side far from the axis C1) and travels the optical path Lc hits the same point on the first reflecting surface 81 and is reflected. The light that has traveled and reflected along the optical paths La, Lb, and Lc travels along the optical paths La ′, Lb ′, and Lc ′ after being reflected. Here, the optical path La ′ is light that has exited from the focal point F1 and reflected by the first reflecting surface 81, and thus is parallel to the axis C1. With respect to the optical path La ′, the optical path Lb ′ is on the inner side (side closer to the wall surface W), while the optical path Lc is on the outer side (side far from the wall surface W). Of these optical paths Lb ′ and Lc ′, if the focal point F1 coincides with the center O of the light emitting surface 72, an optical path similar to the optical path Lc ′ can be obtained, but light is emitted inside the focal point F1. Since there is no portion, an optical path similar to the optical path Lb ′ cannot be obtained.

  In this embodiment, since the optical paths Lb and Lb ′ can be provided as described above, for example, when light traveling along the optical path La ′ mainly irradiates the floor surface F, the optical path Lb ′ is the optical path La ′. It is possible to irradiate a region closer to the wall surface W than the irradiation region of the floor surface F by the light traveling through. Further, for example, when the light traveling along the optical path La ′ mainly irradiates the vicinity of the floor surface F on the wall surface W, the optical path Lb ′ is more adjacent to the irradiation area of the wall surface W due to the light traveling along the optical path La ′. The upper region can be illuminated. In any case, the light traveling on the optical path Lb ′ can satisfactorily irradiate the area adjacent to the irradiation area by the light traveling on the optical path La ′ with light having high controllability.

  The second reflecting surface 82 is formed in a spheroid shape obtained by rotating a part of an ellipse around the axis C1. Both the upper focal point f1 and the lower focal point f2 of the ellipse are disposed on the axis C1, the focal point f1 is disposed at the center O of the light emitting surface 72, and the focal point f2 is the second reflecting surface 82. The lower end edge 82a is disposed below the lower end edge part 82a (the lowermost part of the lower end edge). The lower end side of the second reflecting surface 82 is cut by a virtual plane that is inclined so that the A side is located above the axis C1 to form an opening K2. Thereby, the reflected light can be diffused in the circumferential direction.

The above-described first reflecting surface 81 is knurled so as to have a large number of ridges and recesses extending in the circumferential direction in the circumferential direction. Thereby, the reflected light can be diffused in the circumferential direction. On the other hand, the second reflecting surface 82 is faceted. Thereby, the reflected light can be diffused in the circumferential direction and in the vertical direction intersecting with the circumferential direction.
A diffusion plate 90 can be disposed in the opening K2 on the lower side of the reflector 80 described above.

The diffusion plate 90 is formed in a disc shape, and a filter 91 is provided on the front surface side (upper surface side), and a diffusion glass 92 is provided on the back surface side. The filter 91 spreads the direct light from the light emitting surface 22 and the reflected light from the first reflecting surface 81 and the second reflecting surface 82 toward the wall surface W in the left-right direction. The diffusion glass 92 diffuses the light transmitted through the filter 91.
The diffuser plate 90 is supported by the cover 100 together with the reflector 80.

  As shown in FIGS. 5 and 6, the cover 100 has, on the B side, a contact portion 101 made of a steep slope and a placement portion 102 made of a horizontal plane. On the other hand, on the A side, there are two mounting portions 103 made of gentle slopes. The cover 100 also has an arc-shaped step 104 extending from the B side to the A side. The step 104 is inclined so that the A side is positioned on the upper side. In the reflector 80, the outer peripheral surface on the B side is in contact with the contact portion 101, the lower end edge part 82 a is placed on the mounting part 102, and the lower end edge part 82 b (lower end edge part) The vicinity of the uppermost part) is placed on and supported by the mounting portion 103. On the other hand, the diffuser plate 90 is engaged with the stepped portion 104 at least a half circumference of the peripheral edge portion 93, and the portion located on the A side is fixed by a fixing metal fitting 94.

  The cover 100 further includes a first light shielding portion 105 on the A side and a second light shielding portion 106 on the B side. The first light-shielding portion 105 is disposed on the upper side of the cover 100, and a gentle concave edge E1 toward the central axis C0 is formed at the inner end thereof. On the other hand, the second light-shielding portion 106 is disposed at the lower end of the cover 100, and a gentle concave edge E2 toward the central axis C0 is formed at the inner end thereof. These edges E1 and E2 are opposed to each other across the central axis C0 when viewed from below (when viewed from below), and are longer in the direction along the wall surface W than in the direction perpendicular to the wall surface W. Forming part.

  These edges E1 and E2 regulate the cut-off angle. Among these, the edge E2 particularly increases the cut-off angle θ2 when approaching the wall surface W. When there is no light shielding part 106, the inclination angle of the diffusing plate 90 becomes the cut-off angle θ1 as it is. In contrast, the edge E2 increases the cut-off angle θ2 by providing the light-shielding portion 106 so as to protrude toward the central axis C0.

  The cone (holding member) 110 has a cylindrical portion 111 and a reflecting portion 112. Among these, the cylindrical part 111 has the step part (engagement recessed part) 113 near the upper end. When the luminaire main body 20 is attached to the above-described embedded frame 10, the stepped portion 113 is urgedly engaged with the fixing spring 14 on the embedded frame 10 side. As a result, the entire lighting fixture body 20 is positioned and fixed with respect to the embedded frame 10.

The reflecting portion 112 is formed so as to extend obliquely upward from the lower end of the cylindrical portion 111 toward the central axis C0, and a reflecting surface 114 is provided on the lower surface (inner surface). The reflecting surface 114 is formed in the shape of a rotating paraboloid obtained by rotating a part of a parabola located in the same plane as the central axis C0 around the central axis C0. The focal point F2 of the parabola is set at the intersection of the central axis C0 and the back surface of the diffusion plate 90. The reflecting surface 114 is disposed at a position deviated from the optical path of the light reflected by the reflecting surfaces 81 and 82 on the B side in the reflector 80 so that a part of the light diffused by the diffusion plate 90 hits. It has become.
By providing such a reflective surface 114, the amount of light directed toward the floor surface can be increased and the controllability of this light can be enhanced.

Note that, assuming that the axis serving as the center of rotation of the reflecting surface 114 is the rotation axis C3, the example in which the rotation axis C3 coincides with the center axis C0 has been described above. Instead of this, the rotation axis C3 may coincide with the axis C1 of the reflector 80. Further, the rotation axis C3 may be set between the center axis C0 and the axis C1. That is, when the inclination angle of the rotation axis C3 with respect to the central axis C0 is γ, between this γ and the inclination angle α of the axis C1 with respect to the central axis C0,
0 ≦ γ ≦ α
May be established. However, in any case, the focal point F2 of the reflecting surface 114 is set at the intersection of the rotation axis C3 and the back surface of the diffusion plate 90.
The reflecting surface 114 can enhance the controllability of light in the direction toward the rotation axis C3 regardless of the inclination angle γ.

  Here, FIG. 8 is a diagram illustrating an optical path of light emitted from the lighting fixture 1. FIG. 9 is a diagram for explaining an optical path of light emitted from the lighting fixture 1 and an irradiation range (region). In these drawings, the case where the rotation axis C3 of the reflecting surface 114 coincides with the axis C1 of the reflector 80 is illustrated.

As shown in FIG. 8, the light that has exited from the light emitting surface 72 and reflected by the first reflecting surface 81 of the reflector 80 passes through the diffuser plate 90 and travels substantially between the optical path L1 and the optical path L2.
Further, the light that has exited from the light emitting surface 72 and reflected by the second reflecting surface 82 of the reflector 80 passes through the diffusion plate 90 and travels substantially between the optical path L3 and the optical path L4.
In addition, a part of the light emitted from the light emitting surface 72 and diffused by the diffusing plate 90 is substantially reflected between the optical path L5 and the optical path L6.
Further, the direct light emitted from the light emitting surface 72 travels substantially between the optical paths L7 and L8.

As a result, for example, when the lighting fixture 1 is installed at a height of 3000 mm from the floor surface F and a distance of 600 mm from the wall surface W, the floor surface F and the wall surface are transmitted by the light traveling along the optical paths L1 to L8 described above. W is irradiated. In particular, the wall surface W is uniformly irradiated from the vicinity of the ceiling C to the vicinity of the floor surface F.
Below, the effect | action and effect of the lighting fixture main body 20 of the above-mentioned structure and the lighting fixture 1 are put together.

  The reflector 80 is disposed in an inclined posture so that the lower side of the axis C1 approaches the wall surface W, and the light emitting surface 72 of the planar light source 70 is a first virtual plane H1 orthogonal to the axis C1. Is inclined so that the side farther from the wall surface W (B side) is positioned relatively upward. That is, the light emitting surface 72 is directed to a portion of the reflector 80 that is located on the side farther from the wall surface W than the axis C1. Thereby, the light quantity supplied to the side far from the wall surface W of the reflector 80 among the light quantity of the light inject | emitted from the light emission surface 72 increases.

When the inclination angle of the axis C1 of the reflector 80 with respect to the central axis C0 is α, and the inclination angle of the light emitting surface 72 with respect to the first virtual plane H1 is β, between these α and β,
α ≦ β ≦ 90 degrees holds.

  Here, the case where α = β is a case where the light emitting surface 72 is horizontal and perpendicular to the central axis C0 in the vertical direction, and the case where β = 90 degrees is the inclination of the light emitting surface 72. This is a case where the angle β is the same as the inclination angle α of the axis C1. The light emitting surface 72 can be adjusted between the light emission surfaces 72 by adjusting the amount of increase in the amount of light supplied to the far side from the wall surface W of the reflector 80.

  The reflector 80 whose axis C1 is inclined with respect to the central axis C0 of the luminaire main body 20 is closest to the portion M (or the portion N) located farthest from the central axis C0 among the portions of the reflector 80. The difference in the distance from the central axis C0 with the portion N (or the portion M) located at can be reduced. In other words, since the axis C1 of the reflector 80 is inclined with respect to the central axis C0 of the luminaire main body 20, the center of the light emitting surface 72 positioned on the axis C1 of the reflector 80 is further increased. When trying to arrange on the central axis C0 of 20, the substantial radius of the reflector 80 with reference to the central axis C0 of the luminaire main body 20 may be increased. On the other hand, the substantial radius of the reflector 80 with respect to the central axis C0 can be minimized by shifting the light emitting surface 72 and the reflector 80 from the central axis C0 by an appropriate distance.

  The reflector 80 is disposed in an inclined posture with respect to the luminaire main body 20, and has the first reflecting surface 81 having a parabolic surface and the second reflecting surface 82 having a spheroidal surface. The controllability of light in the direction of the axis C1 by the first reflection surface 81 and in the direction intersecting the axis C1 by the second reflection surface 82 can be enhanced.

  Since the first reflecting surface 81 has a parabolic focal point F1 deviated from the center O of the light emitting surface 72, the light is emitted from the focal point F1 and reflected by the first reflecting surface 81 and travels parallel to the axis C1. An area (range) inside (an area close to the wall surface W in FIG. 5) of the irradiation area (range) is irradiated by light emitted from the inside of the light emitting surface 72 relative to the focal point F1, and the outside (FIG. 5). A region (range) on the side far from the inner wall surface W) can be irradiated with light emitted from the outside of the focal point F1 of the light emitting surface 72.

  The second reflecting surface 82 is arranged in the optical path of the light whose upper focal point f1 of the ellipse exits the light emitting surface 72 and reaches the second reflecting surface 82, and the lower focal point f2 of the ellipse Since it is disposed below a part (lower end) 82a of the lower end edge of the reflecting surface 82, the light that has exited the light emitting surface 72 and passed through the upper focal point f1 is reflected by the second reflecting surface 82. Then, it passes through the lower focal point f2 and proceeds obliquely downward.

Furthermore, since the upper focal point f1 and the lower focal point f2 are disposed on the axis C1, and the upper focal point f1 is disposed at the center of the light emitting surface 72, the light emitted from the center of the light emitting surface 72 is The light is reflected by the second reflecting surface 82, passes through the lower focal point f2, and proceeds obliquely downward.
The first reflecting surface 81 is knurled, and can diffuse the reflected light in the circumferential direction.
-Since the 2nd reflective surface is given facet processing, reflected light can be diffused in the direction which intersects with the peripheral direction.

Since the cone (holding member) 110 has the rotary parabolic reflecting surface 114 on the side closer to the wall surface W than the axis C1, the luminaire main body 20 receives reflected light from the reflector 80. The reflected light from the reflecting surface 114 can be added, and the controllability of the irradiation light can be improved accordingly.
The reflecting surface 114 can set the direction in which the reflected light is directed within this range by setting the inclination angle γ of the rotation axis C3 so as to satisfy 0 ≦ γ ≦ α.
The reflecting surface 114 can reflect the light that has passed through the focal point F2 toward the rotation axis C3.

  By providing the diffusing plate 90, the reflecting surface 114 can receive and reflect the light from the diffusing plate 90 even when it cannot receive the reflected light from the reflector 80 directly.

1 Lighting fixture 10 Embedded frame (main body fixture)
DESCRIPTION OF SYMBOLS 20 Lighting fixture main body 30 Socket 40 Body 50 Light source attachment member 60 Base | substrate 70 Planar light source 72 Light emission surface 80 Reflector 81 1st reflection surface 82 2nd reflection surface 90 Diffusion plate 100 Cover 110 Cone (holding member)
114 Reflective surface C Ceiling surface C0 Central axis C1 Axis center C3 Rotation axis F1 Parabolic focus F2 Parabolic focus f1 Ellipse upper focus f2 Ellipse lower focus H1 First virtual plane W Wall α Central axis to the central axis The tilt angle of the light emitting surface with respect to the first virtual plane γ The tilt angle of the rotation axis

Claims (5)

In the lighting fixture body used by being embedded in the ceiling surface in a posture with the central axis oriented in the vertical direction,
A planar light source having a light emitting surface;
A reflector formed in a bowl shape centered on the axis, and disposed to cover the lower side of the light emitting surface;
A holding member for holding the reflector,
The holding member has a paraboloidal reflecting surface obtained by rotating a part of a parabola located in the same plane as the axis on the side closer to the wall surface than the axis.
A luminaire body characterized by that. The reflecting surface is formed in the shape of the rotating paraboloid obtained by rotating around a rotation axis located in the same plane as a part of the parabola,
When the rotation axis is α and the inclination angle of the rotation axis with respect to the central axis is γ, and the inclination angle of the rotation axis with respect to the central axis is γ,
0 ≦ γ ≦ α
Is set to hold,
The lighting fixture body according to claim 1. The reflecting surface has a focal point disposed on the rotation axis,
The lighting fixture body according to claim 2. A diffusion plate is provided between the reflector and the reflecting surface,
The reflection surface reflects a part of the light diffused by the diffusion plate toward the rotation axis direction.
The lighting fixture main body according to claim 2 or 3, A main body fixture fixed to a mounting hole drilled in the ceiling surface;
A lighting fixture main body detachable with respect to the main body fixture,
The luminaire main body is the luminaire main body according to any one of claims 1 to 4.
A lighting apparatus characterized by that.

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