JP2016126917A - Lighting tool body and luminaire including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting tool body facilitating manufacturing including assembly, excellent in heat conductivity and heat radiation, and capable of controlling light from a light source.SOLUTION: A lighting tool body includes: a body 11 to which a light source 15 is attached; a reflector 12 directly reflecting light from the light source 15; and a heat radiation fin 13 radiating heat transmitted from the light source 15 through the body 11. The body 11, the reflector 12 and the heat radiation fin 13 are integrally molded by extrusion processing or extraction processing of metal, and are formed so as to be long in an extrusion direction or extraction direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a lamp body formed long in one direction, and a lighting fixture including the lamp body.

  Patent Document 1 discloses a lighting device (lighting fixture) that is formed long in one direction.

  In this lighting device, the central plate-shaped portion (body), both side portions (radiating fins), and the inner side surface (reflector) constituting the lighting device body (lamp body) are integrally formed by extrusion molding of aluminum. ing.

  In this illuminating device, a part of the light from the light source is reflected by the surface of the light transmitting part, and the remaining light passes through the light transmitting part. A part of the light reflected on the surface of the light transmitting part is re-reflected on the inner side surface, dispersed when passing through the light transmitting part, and irradiated downward.

According to this lighting device, since the central plate-shaped portion, both end portions, and the inner side surface constituting the lighting device main body are integrally formed, as compared with the case where these are configured as individual members, assembly is possible. Manufacture is easy because it is unnecessary. Moreover, since there is no junction part between each member, there exists an advantage that it is excellent in thermal conductivity and heat dissipation.
In addition, since the light emitted from the light source and reflected by the light transmitting portion is further reflected again by the inner surface and passed through the light transmitting portion, light can be irradiated over a wide range.

JP 2007-26723 A

  However, according to the illuminating device of Patent Document 1, since the illuminating device main body cannot directly control light reflected from the light source, the light control is performed exclusively by other members (in the above example). There is a problem that it depends on the light transmitting part).

  That is, when the illumination device main body of Patent Document 1 is incorporated as a part of the illumination device, the light control depends on other members, so that restrictions and burdens on the optical design of other members and the like increase.

  The present invention has been made in view of the above-described circumstances, and is easy to manufacture including assembling, has excellent thermal conductivity and heat dissipation, and controls light from a light source as a single unit. It is an object of the present invention to provide a lamp body that can be used, and a lighting fixture including the lamp body.

  The invention according to claim 1 is a lamp body, wherein a body to which a light source is attached, a reflector that directly reflects light from the light source, and a heat radiation fin that radiates heat transmitted from the light source through the body. And the body, the reflector, and the heat dissipating fin are integrally formed by metal extrusion or drawing, and are formed in a long length in the extrusion direction or the drawing direction. .

  According to a second aspect of the present invention, in the lamp body according to the first aspect, the side on which the light source is attached is the upper side, the light emission port side of the reflector is the lower side, and is orthogonal to the longitudinal direction of the lamp body. When the straight line extending in the vertical direction through the center of the light source in the cross section to be used is the center line of the lamp body, the reflector is positioned on the other side and the first reflecting surface located on one side with respect to the center line. A second reflecting surface, wherein the first reflecting surface reflects light from the light source toward the obliquely lower side of the other side, and the second reflecting surface obliquely reflects light from the light source on the one side. The light is reflected downward.

  According to a third aspect of the present invention, in the lamp body according to the second aspect, the reflector has at least one of the first reflective surface and the second reflective surface in the cross section, and the major axis is in the vertical direction. It is a part of an ellipse directed to.

  According to a fourth aspect of the present invention, in the lamp body according to the third aspect, the ellipse has the major axis disposed on the center line and the upper focal point disposed at the center of the light source. Features.

  The invention according to claim 5 is characterized in that, in the lamp body according to claim 4, the ellipse has a lower focal point disposed below the light exit port of the reflector.

  The invention according to claim 6 is the lamp body according to claim 2, wherein the reflector has at least one of the first reflecting surface and the second reflecting surface in the cross section, and the center line is closer to the upper side. It is characterized by being a straight line close to

  According to a seventh aspect of the present invention, in the lamp body according to the second aspect, at least one of the first reflective surface and the second reflective surface in the cross section of the reflector is parallel to the center line. It is characterized by a straight line shape.

  The invention according to claim 8 is the lamp body according to any one of claims 2 to 8, wherein the body has a diffusion plate holding groove for horizontally holding the diffusion plate covering the light exit port. It is formed so that it may be adjacent to the lower end of a 1st reflective surface and a 2nd reflective surface.

  According to a ninth aspect of the present invention, there is provided a lighting apparatus comprising: a lamp main body; a light source attached to the lamp main body; and a detachable cone attached to the lamp main body, wherein the lamp main body is the first aspect. A lighting fixture comprising the lamp body according to any one of Items 8 to 8.

  According to the first aspect of the present invention, the lamp body has the body, the reflector, and the heat radiating fin integrally formed by metal extrusion or drawing. Thereby, compared with the case where these bodies, reflectors, and radiating fins are individually formed and assembled, assembling is not necessary and manufacturing is easy.

  In addition, the lamp body is entirely made of metal, acts as a heat sink, and there is no joint between the body, the reflector, and the heat radiating fins. Is expensive. Thereby, it contributes to size reduction of the lighting fixture provided with the lamp main body and the lamp main body.

  Furthermore, since the lamp body can directly reflect the light from the light source with the reflector, the light from the light source can be reflected and emitted as a controlled light as a single lamp body.

  According to the invention of claim 2, the reflector has a first reflection surface located on one side with respect to the center line and a second reflection surface located on the other side, and the first reflection surface is light from the light source. Is reflected toward the lower side of the other side, and the second reflecting surface is controlled by reflecting light from the light source toward the lower side of the one side.

  According to the invention of claim 3, in the reflector, at least one of the first reflecting surface and the second reflecting surface in the cross section is a part of an ellipse whose major axis is directed in the vertical direction. Thereby, the light which goes out of the light source and passes through the upper focal point is reflected by the first reflecting surface or the second reflecting surface and passes through the lower focal point, so that the light controllability can be improved.

  According to the invention of claim 4, the ellipse has the major axis arranged on the center line, and the upper focal point arranged at the center of the light source. Thereby, the light emitted from the center of the light source (upper focal point) is reflected by the first reflecting surface or the second reflecting surface and passes through the lower focal point. That is, the controllability of light emitted from the center of the light source can be further enhanced.

  According to the invention of claim 5, the lower focal point of the ellipse is arranged below the light exit port of the reflector. Thereby, the light passing through the upper focal point is reflected by the reflector, passes through the lower focal point, and is irradiated obliquely downward.

  According to the invention of claim 6, in the reflector, at least one of the first reflecting surface and the second reflecting surface in the cross section is formed in a linear shape closer to the center line as it goes upward. Thereby, the light which has come out of the light source and hit one of the reflecting surfaces is reflected obliquely downward.

  According to the invention of claim 7, at least one of the first reflection surface and the second reflection surface in the cross section of the reflector is formed in a straight line parallel to the center line. As a result, light that has exited from the light source and impinged on one of the reflection surfaces is reflected obliquely downward at the same reflection angle as the incident angle.

According to the invention of claim 8, the body is formed such that the diffusion plate holding groove for horizontally holding the diffusion plate covering the light emission port is adjacent to the lower ends of the first reflection surface and the second reflection surface. ing. In other words, the reflecting surface is extended to the diffusion plate holding groove. As a result, the amount of reflected light, that is, the amount of controllable light can be increased.
According to invention of Claim 9, a lighting fixture can show | play the effect of the lamp main body of the above-mentioned Claims 1-8 as the whole lighting fixture.

It is the figure which looked at the cross section orthogonal to a longitudinal direction of the lighting fixture 1 from the front side. It is a figure explaining reflection of the light by the 3rd reflective surface 22a1 in FIG. It is the perspective view seen from diagonally upward explaining the attachment of the lighting fixture 1 with respect to the attachment frame 30. FIG. It is the perspective view seen from diagonally downward explaining the attachment of the lighting fixture 1 with respect to the attachment frame 30. FIG. (A), (B) is a figure explaining attachment of the attachment frame 30 with respect to the ceiling C, (A) is the figure seen from the direction orthogonal to a longitudinal direction, (B) is the figure seen from the longitudinal direction. . (A), (B) is a figure explaining attachment of the lighting fixture 1 with respect to the attachment frame 30, (A) is the figure seen from the direction orthogonal to a longitudinal direction, (B) is the figure seen from the longitudinal direction. is there. (A), (B) is a figure explaining the lighting fixture 1 after attaching to the attachment frame 30, (A) is the figure seen from the direction orthogonal to a longitudinal direction, (B) was seen from the longitudinal direction. FIG. It is a figure which shows the cross section orthogonal to the longitudinal direction of the lighting fixture. It is a figure which shows the cross section orthogonal to the longitudinal direction of the lighting fixture. (A) is a figure which shows the cross section orthogonal to a longitudinal direction of the lighting fixture 4, (B) is a figure which shows the cross section orthogonal to the longitudinal direction of the lighting fixture 5. FIG.

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>

  A lamp body 10 to which the present invention is applied and a lighting fixture 1 to which the present invention is applied will be described with reference to FIGS. In addition, the lighting fixture 1 is an embedded type downlight, and the case where this is attached to the ceiling C (refer FIGS. 5-7) is demonstrated to an example.

  1 to 7, FIG. 1 is a view of a cross section perpendicular to the longitudinal direction (front-rear direction) of the lighting fixture 1 as seen from the front side. FIG. 2 is a diagram for explaining light reflection by the third reflecting surface 22a1 in FIG. FIG. 3 is a perspective view illustrating the attachment of the luminaire 1 to the attachment frame 30 as viewed obliquely from above. FIG. 4 is a perspective view illustrating the attachment of the luminaire 1 to the attachment frame 30 as viewed obliquely from below.

  In the following description, for convenience of explanation, the description will be made assuming that the up, down, front, back, left, and right indicated by the arrows in the upper left in FIG. 1 and FIG. It is not limited to.

  As illustrated in FIG. 1, the lighting fixture 1 includes a lamp body (lighting fixture body) 10 and cones 20 and 20. In the lighting fixture 1, the lamp body 10 and the cones 20, 20 are symmetrical with respect to a portion located on the left side and a portion located on the right side with respect to a plane H orthogonal to the left-right direction. The lighting fixture 1 is formed long in the front-rear direction, and a cross section orthogonal to the longitudinal direction (hereinafter simply referred to as “cross section”) has the shape shown in FIG. 1 except for a part of the front end and the rear end. It becomes the same shape. Of the plane H described above, the line appearing in the cross section shown in FIG. 1 is the center line Cn.

  The lamp body 10 includes a body 11, a reflector 12, a radiation fin 13, and a holder 14. The body 11, the reflector 12, the radiation fins 13, and the holder 14 are integrally formed by a metal extrusion process or a drawing process, and are formed in a long length in the extrusion direction or the drawing direction. That is, the lamp body 10 is formed in a long shape in the front-rear direction, and the cross-sectional shape at an arbitrary position in the front-rear direction is the shape shown in FIG.

  As shown in FIG. 1, the body 11 is formed in a “U” shape with the light exit (opening) K facing downward. That is, the body 11 has a ceiling part 11a and a pair of side wall parts 11b extending downward from both left and right ends of the ceiling part 11a. The lower surface of the ceiling part 11a is a light source attachment surface 11c, and the light source 15 is attached thereto. A light source 15 is disposed along the front-rear direction at the center (on the center line Cn) in the left-right direction of the light source mounting surface 11c. For example, the light source 15 can be configured by arranging a large number of LEDs (not shown) at equal intervals in the front-rear direction. The light source 15 is not limited to an LED.

  The reflector 12 is divided into a left portion located on the left side (one side) and a right side portion located on the right side (the other side) with respect to the center line Cn. A first reflecting surface 12a1 is formed on the inner surface of the left portion, and a second reflecting surface 12a2 is formed on the right portion. In the lamp body 10 shown in FIG. 1, the first reflecting surface 12a1 and the second reflecting surface 12a2 are formed in the same shape, but the present invention is not limited to this.

  The first reflecting surface 12a1 and the second reflecting surface 12a2 have a cross-sectional shape that is a part of a first ellipse (ellipse) A. The first ellipse A is an ellipse whose major axis A1 is directed in the vertical direction. In the illustrated example, the long axis A <b> 1 is disposed on the center line Cn, and the upper focal point Aa is disposed at the center of the light source 15. The lower focal point Ab is disposed below the light exit port K of the reflector 12.

Diffusion plate holding grooves 11d and 11d are formed inside the lower end portions of the side wall portions 11b and 11b in the body 11, respectively. The diffusion plate holding grooves 11d and 11d are formed adjacent to the lower ends 12b and 12b of the first reflecting surface 12a1 and the second reflecting surface 12a2, respectively. In other words, the first reflecting surface 12a1 and the second reflecting surface 12a2 are formed so as to extend to the diffusion plate holding grooves 11d and 11d, thereby ensuring a large area of the reflecting surface. This increases the amount of light that can be reflected by the first reflecting surface 12a1 and the second reflecting surface 12a2, that is, the amount of light that can be controlled. The diffusion plate holding grooves 11d and 11d support the left end portion and the right end portion of the long plate-like diffusion plate 16 from below, respectively, and hold the entire diffusion plate 16 horizontally.
In addition, in order to raise the reflectance of the 1st reflective surface 12a1 and the 2nd reflective surface 12a2, you may make it stick a reflective sheet (not shown), for example.

  The heat radiating fins 13 project in a plate shape upward from the upper surface of the ceiling portion 11a in the body 11. A plurality of heat radiation fins 13 are arranged at equal intervals in the left-right direction. The radiating fin radiates heat generated by the light source 15 and transmitted through the body 11.

  The holders 14, 14 are provided so as to protrude upward from both ends in the left-right direction of the ceiling portion 11 a of the body 11. The holders 14 and 14 have a bent portion 14a bent inward at the upper end. As shown in FIG. 3, the bent portion 14 a is for supporting a holding fitting 17 that holds the V-shaped spring 18 and a connecting fitting 19 that connects the safety wire 33.

The above-described lamp body 10 is configured to be plane-symmetric with respect to the plane H as a whole. That is, each of the body 11, the reflector 12, the heat radiating fins 13, and the holder 14 constituting the lamp body 10 is configured or arranged symmetrically with respect to the plane H.
Next, the cones 20 and 20 will be described.

  In the lighting fixture 1, the left and right cones 20, 20 are formed in the same shape, and are formed long in the front-rear direction, similar to the lamp body 10 described above. The cones 20 and 20 are individually attached to the lower end portion of the left side wall portion 11b of the body 11 and the lower end portion of the right side wall portion 11b so as to be easily attached and detached (easy to replace).

  Each cone 20 has an attachment portion 21 and a hood portion 22. Of these, the attachment portion 21 is formed in an “L” shape and is a portion attached to the lower end portion of the side wall portion 11 b of the body 11.

  A third reflecting surface 22a1 is formed inside the left hood portion 22. As shown in FIG. 2, the third reflecting surface 22a1 has a cross-sectional shape that is a part of a parabola based on the reference line Cm. The reference line Cm is located on the right side of the center line Cn, that is, on the side farther from the third reflection surface 22a1 than the center line Cn, and is parallel to the center line Cn. Here, the intersection of the diffusion plate 16 and the center line Cn is a point 16o, the intersection of the diffusion plate 16 and the reference line Cm is a point 16a, and further, a point located on the left side of the point 16o on the diffusion plate 16 is a point Assuming 16b, the above-mentioned parabola is a parabola with the point 16a as the focal point F. The upper end 22b (see FIG. 1) of the third reflecting surface 22a1 is a point that regulates the irradiation angle of the direct light from the light source 15.

As shown in FIG. 2, since the third reflecting surface 22a1 is configured by a part of the parabola as described above, the light from the point 16a is reflected directly below (parallel to the center line Cn) and from the point 16o. Is reflected away from the center line Cn, and the light from the point 16b is reflected further away from the center line Cn. For this reason, the third reflecting surface 22a1 is, for example, the third reflecting surface from the direction of the arrow K as compared to the case where the third reflecting surface 22a1 is formed in a straight line shape or the case where the third reflecting surface 22a1 is configured by a part of a parabola having a focus at the point 16o. Reflective glare when viewing 22a1 can be effectively reduced.
The third reflective surface 22a1 of the left cone 20 has been described above, but the same applies to the fourth reflective surface 22a1 of the right cone 20.
Next, with reference to FIGS. 5-7, attachment of the lighting fixture 1 with respect to the ceiling C is demonstrated.

  Here, FIGS. 5A and 5B are views for explaining the attachment of the attachment frame 30 to the ceiling C. FIG. 5A is a view seen from a direction orthogonal to the longitudinal direction, and FIG. 5B is a view from the longitudinal direction. FIG. 6 (A) and 6 (B) are views for explaining the attachment of the luminaire 1 to the attachment frame 30, (A) is a view seen from a direction orthogonal to the longitudinal direction, and (B) is a view from the longitudinal direction. FIG. 7A and 7B are diagrams illustrating the lighting fixture 1 after being attached to the attachment frame 30, where FIG. 7A is a view seen from a direction orthogonal to the longitudinal direction, and FIG. It is the figure seen from the direction

  As shown in FIGS. 5 to 7, in order to attach the lighting fixture 1 to the ceiling C, first, the mounting frame 30 is fixed to the ceiling C, and then the lighting fixture 1 is attached to the mounting frame 30. That is, the luminaire 1 is attached to the ceiling C via the attachment frame 30.

  As shown in FIG. 3, the attachment frame 30 has a frame body 31 that is long in the front-rear direction. The frame body 31 has no top and bottom and penetrates in the vertical direction. Fixing tools 32 are fixed to the upper end of the frame body 31 at two locations on the front end side and the rear end side, respectively. The cross-sectional shape orthogonal to the front-rear direction of the fixture 32 is a “U” shape with an opening at the bottom. A spring receiving hole 32a and a bolt hole 32b, which are long in the front-rear direction, are formed in the top of the fixture 32. Further, a small hole 32c through which the safety wire 33 is passed is formed.

  On the other hand, the lighting fixture 1 is provided with a V-shaped spring 18 in which the coil portion 18 a is connected to the holding fitting 17 and a connecting fitting 19 that connects the safety wire 33 so as to be caught by the bent portion 14 a of the holder 14. Yes. The holding metal fitting 17 and the connecting metal fitting 19 are movable in the front-rear direction.

  As shown in FIGS. 5A and 5B, a mounting bolt Bo whose upper end is fixed with concrete is suspended on the back side of the ceiling C. First, the mounting frame 30 is inserted into the mounting hole C1 of the ceiling C from below, and the tip (lower end) of the mounting bolt Bo is passed through the bolt hole 32b of the fixture 32. A nut N is screwed onto the tip of the mounting bolt Bo and tightened to raise the entire mounting frame 30 and fix it to the mounting hole C1 of the ceiling C as shown in FIGS. 6 (A) and 6 (B). To do.

Subsequently, the safety wire 33 is connected to the connection fitting 19 on the lighting fixture 1 side. The upper end of the V-shaped spring 18 is narrowed and passed through the spring receiving hole 32a of the fixture 32 and released. When the lighting fixture 1 is pushed up from below the attachment frame 30, the bent portion 18b side of the upper end of the V-shaped spring 18 expands in the spring receiving hole 32a. Thereby, the lighting fixture 1 can be attached to the ceiling C via the attachment frame 30 in a state of being biased upward by the V-shaped spring 18.
In addition, when removing the lighting fixture 1 from the ceiling C, it can carry out in the reverse procedure to the attachment demonstrated above.
With reference to FIG. 1, the light distribution of the lighting fixture 1 as a downlight is demonstrated.

  Here, as described above, the first reflecting surface 12a1 and the second reflecting surface 12a2 of the reflector 12 shown in FIG. 1 are formed by a part of the first ellipse A. In the first ellipse A, the long axis A1 is disposed on the center line Cn passing through the center of the light source 15, the upper focal point Aa is disposed at the center of the light source 15, and the lower focal point is further disposed. Ab is arranged below the light exit port K. On the other hand, the third reflecting surface 22a1 and the fourth reflecting surface 22a2 are formed by a part of the parabola described in FIG.

  As a result, the lights L1 and L2 that have exited from the center of the light source 15 and hit the substantially vertical center and the lower end 1b of the first reflecting surface 12a1 pass through the lower focal point Ab toward the lower right side of the floor. Irradiate surface FL. The light L3 emitted from the center of the light source 15 travels directly below as direct light, and the light L4 passes through the vicinity of the upper end 22b of the third reflection surface 22a1 and travels diagonally to the left as direct light.

The light L1 to L4 emitted toward the left side from the center of the light source 15 has been described above, but the same applies to the light emitted toward the right side. Thereby, a relatively wide area in the left-right direction and the front-rear direction on the floor surface FL is uniformly irradiated.
At this time, since the third reflecting surface 22a1 is configured by a part of the parabola described above, it is possible to reduce the reflection glare when viewed from the direction of the arrow K in FIG.
Note that the light emitted from the light source 15 is emitted from the light exit port K after the direct light and the reflected light are appropriately diffused by the diffusion plate 16.
Below, the effect | action and effect of the above-mentioned lamp main body 10 and the lighting fixture 1 are arranged.

  In the lamp body 10, the body 11, the reflector 12, and the heat radiating fins 13 are integrally formed by metal extrusion or drawing. Thereby, compared with the case where these bodies 11, the reflectors 12, and the radiation fins 13 are individually formed and assembled, assembly is not required, and thus manufacture is easy.

  The lamp body 10 is entirely made of metal, functions as a heat sink, and has no joints between the body 11, the reflector 12, and the radiating fins 13. High conductivity and heat dissipation. Thereby, it contributes to size reduction of the lamp main body 10 and the lighting fixture 1 provided with the same.

  Further, since the lamp body 10 can directly reflect the light from the light source 15 by the reflector 12, the lamp body 10 can be emitted as light controlled by reflecting the light from the light source 15 as a single body of the lamp body 10. it can.

  The reflector 12 has a first reflecting surface 12a1 located on one side with respect to the center line Cn and a second reflecting surface 12a2 located on the other side, and the first reflecting surface 12a1 receives the light from the light source 15 on the other side. The second reflection surface 12a2 reflects light from the light source 15 obliquely downward on one side. Thereby, light can be controlled.

  In the reflector 12, at least one of the first reflecting surface 12a1 and the second reflecting surface 12a2 is a part of a first ellipse (ellipse) A with the long axis A1 in the vertical direction. As a result, light exiting from the light source 15 and passing through the upper focal point Aa is reflected by the first reflecting surface 12a1 or the second reflecting surface 12a2 and passes through the lower focal point Ab, thereby improving the controllability of the light. it can.

  In the first ellipse A, the long axis A1 is disposed on the center line Cn, and the upper focal point Aa is disposed at the center of the light source 15. Thereby, the light emitted from the center of the light source 15 (upper focal point Aa) is reflected by the first reflecting surface 12a1 or the second reflecting surface 12a2 and passes through the lower focal point Ab. That is, the controllability of light emitted from the center of the light source 15 can be further enhanced.

  In the first ellipse A, the lower focal point Ab is disposed below the light exit port K of the reflector 12. Thereby, the light passing through the upper focal point Aa is reflected by the reflector 12, passes through the lower focal point Ab, and is irradiated obliquely downward.

  The body 11 is formed so that a diffusion plate holding groove 11d for horizontally holding the diffusion plate 16 covering the light exit port K is adjacent to the lower ends 12b of the first reflection surface 12a1 and the second reflection surface 12a2. Yes. In other words, the lower ends 12b of the first reflecting surface 12a1 and the second reflecting surface 12a2 are extended to the diffusion plate holding groove 11d. As a result, the amount of reflected light, that is, the amount of controllable light can be increased.

-In the lighting fixture 1, the reflector 12 has the 1st reflective surface 12a1 located in one side on the basis of the centerline Cn, and the 2nd reflective surface 12a2 located in the other side, and the 1st reflective surface 12a1 is the light source 15. The second reflection surface 12a2 reflects light from the light source 15 obliquely downward on one side. Moreover, the cone 20 has the 3rd reflective surface 22a1 or the 4th reflective surface 22a2 which reflects the light from the light source 15, or the light from a reflector. Thereby, the reflected light from the 1st reflective surface 12a1 or the 2nd reflective surface 12a2 can be reflected by the 3rd reflective surface 22a1 or the 4th reflective surface 22a2, and the controllability of light can be improved.
<Embodiment 2>
The lighting fixtures 2 and 3 to which the present invention is applied will be described with reference to FIGS.

Here, FIG. 8 is a view showing a cross section of the lighting fixture 2 perpendicular to the longitudinal direction. Moreover, FIG. 9 is a figure which shows the cross section orthogonal to the longitudinal direction of the lighting fixture 3. As shown in FIG. Here, the lighting fixture 3 is a modification of the fourth reflecting surface 53a of the lighting fixture 2.
These luminaires 2 and 3 are wall washer type downlights, that is, luminaires that can illuminate the wall surface W as well as the floor surface FL.

  As illustrated in FIG. 8, the lighting fixture 2 includes a lamp main body (lighting fixture main body) 10 and cones 50A and 50B. In addition, the lamp body 10 of the lighting fixture 2 is the same as the lamp main body 10 of the lighting fixture 1 of Embodiment 1 described above. That is, in the lamp body 10, the reflectors 12 and 12 have the first reflecting surface 12 a 1 and the second reflecting surface 12 a 2, respectively. Further, the first reflecting surface 12a1 and the second reflecting surface 12a2 have a cross-sectional shape formed by a part of the first ellipse A. The first ellipse A is an ellipse whose major axis A1 is directed in the vertical direction. The long axis A <b> 1 is disposed on the center line Cn, and the upper focal point Aa is disposed at the center of the light source 15. The lower focal point Ab is disposed below the light exit port K of the reflector 12.

  The cones 50 </ b> A and 50 </ b> B are formed long in the front-rear direction similarly to the lamp body 10. The cones 50A and 50B have attachment portions 51 and 51 and hood portions 52 and 53, respectively. Of these, the attachment portion 51 is formed in an “L” shape, and is a portion attached to the lower end portions of the side wall portions 11 b and 11 b of the body 11. On the other hand, in the hood parts 52 and 53, the left hood part 52 located on the left side of the center line Cn and the right hood part 53 located on the right side are formed in different shapes.

  The left hood portion 52 has a third reflecting surface 52a on the inner side. The third reflecting surface 52a is formed in an inclined shape so as to approach the center line Cn toward the upper side as a whole, and is further subjected to baffle processing for reducing reflection glare. On the other hand, the right hood portion 53 has a fourth reflecting surface 53a on the inner surface. The fourth reflecting surface 53a is formed by a part of the second ellipse B having the long axis B1 inclined with respect to the center line Cn. The long axis B1 is inclined in the direction in which the lower end side is located on the left side of the center line Cn, that is, the direction toward the wall surface W. The upper focal point Ba of the second ellipse B is located on the center line Cn and coincides with the lower focal point Ab of the first ellipse A. Further, the lower focal point Bb of the second ellipse B is slightly lower than the ceiling C in the vicinity of the lower end of the third reflecting surface 52a and the same height as or slightly lower than the lower end 53c of the fourth reflecting surface 53a. It is arranged on the upper side.

  In addition, a diffusion plate holding groove 53b is formed in the right cone 50B slightly above the lower end 53c of the second reflecting surface 53a. The diffusion plate holding groove 53b and the diffusion plate holding groove 11d near the lower left end of the body 11 support the left and right ends of the diffusion plate 54 (see FIG. 9), respectively. Is held in an inclined position. The diffusion plate 54 intersects the major axis B1 of the second ellipse B.

  With reference to FIG. 8, the light distribution of the lighting fixture 2 as a wall washer type downlight is demonstrated. Note that light L1 to L8 described below with reference to FIG. 8 is assumed to be emitted from the center of the light source 15 (the upper focal point Aa of the first ellipse A).

The light L1 is reflected at substantially the center in the vertical direction on the second reflecting surface 12a2, passes through the lower focal point Ab of the first ellipse A (the upper focal point Ba of the second ellipse B), and obliquely to the left. move on.
The light L2 is reflected by the lower end 12b of the second reflecting surface 12a2, passes through the lower focal point Ab of the first ellipse A (the upper focal point Ba of the second ellipse B), and travels diagonally to the left.

  The light L3 is reflected at substantially the center in the vertical direction of the first reflecting surface 12a1, passes through the lower focal point Ab of the first ellipse A (the upper focal point Ba of the second ellipse B), and passes through the fourth reflecting surface. The light is reflected again in the vicinity of the lower end of 53a and travels toward the wall surface W through the lower focal point Bb of the second ellipse B.

  The light L4 is reflected by the lower end 12b of the first reflecting surface 12a1, passes through the lower focal point Ab of the first ellipse A (the upper focal point Ba of the second ellipse B), and again by the fourth reflecting surface 53a. Reflected and travels toward the wall surface W through the lower focal point Bb of the second ellipse B.

  Regarding the lights L5 to L8, the light L5 is reflected by the fourth reflecting surface 53a and travels diagonally to the left. The light L6 is direct light that passes obliquely downward to the right through the lower end 53c of the fourth reflecting surface 53a. The light L7 is light that is reflected near the lower end 53c of the fourth reflecting surface 53a and travels obliquely downward to the left. And the light L8 is the light which goes to the left diagonally downward through the upper end of the 3rd reflective surface 52a.

In the lighting fixture 2, the floor surface FL and the wall surface W can be irradiated by the above-described lights L1 to L8 and the like. In other words, it functions as a wall washer type downlight.
Next, actions and effects of the lighting fixture 2 described above will be summarized below.

In the cones 50A and 50B, at least one of the third reflecting surface 52a and the fourth reflecting surface 53a in the cross section (the fourth reflecting surface 53a in the example shown in FIG. 8) has a shape with respect to the center line Cn. Since it is formed by a part of the second ellipse B having the inclined major axis B1, light passing through the upper focal point Ba of the second ellipse B passes through the lower focal point Bb of the second ellipse B. The controllability of light directed to the wall surface W can be enhanced.
In the second ellipse B, since the upper focal point Ba is located on the center line Cn, the light controllability can be further improved.
In the second ellipse B, the upper focal point Ba coincides with the lower focal point Ab of the first ellipse, so that the light controllability can be further improved.

  Since the diffusion plate 54 intersecting the major axis B1 of the second ellipse B is provided between the upper focal point Ba and the lower focal point Bb of the second ellipse B, the upper side of the second ellipse B The light after passing through the focal point Ba can be diffused before passing through the lower focal point Bb.

The diffusion plate 54 is supported by the body 11 at one end in the cross section and supported by the cone 50B at the other end, and can be easily attached / detached by attaching / detaching the cone 50B to / from the body 11.
A lighting fixture 3 shown in FIG. 9 is provided with a cone 50B ′ instead of the cone 50B in the lighting fixture 2 shown in FIG. Other configurations are the same as those of the lighting fixture 2.

  The fourth reflecting surface 53a of the cone 50B ′ moves the second ellipse B shown in FIG. 8 slightly upward so that the upper focal point Ba is located above the lower focal point Ab of the first ellipse A. It is what you do.

As shown in FIG. 8, in the lighting fixture 2, the region R12 between the light L1 and the light L2 and the region R34 between the light L3 and the light L4 are at least below the second ellipse B. There is no overlap on the downstream side in the light traveling direction from the focal point Bb on the side. For this reason, the light quantity of the area | region which does not overlap decreases, and the uniformity of the irradiated light in the wall surface W may not be enough.
Therefore, in the luminaire 3, the upper focal point Ba of the second ellipse B is positioned above the lower focal point Ab of the first ellipse A as described above.

As a result, the region R12 ′ in FIG. 9 corresponding to the region R12 in FIG. 8 and the region 34 ′ in FIG. 9 corresponding to the region R34 in FIG. 8 overlap. Thereby, the light quantity to this area | region can be increased and the uniformity of the irradiated light in the wall surface W can be improved further.
<Embodiment 3>
The lamp main bodies 10A and 10B to which the present invention is applied and the lighting fixtures 4 and 5 including these will be described with reference to FIGS. 10 (A) and 10 (B).

  The lighting fixture 4 shown in FIG. 10A is a lamp main body 10A obtained by changing a part of the shape of the lamp main body 10 in the lighting fixture 1 shown in FIG. It is the same.

That is, in the lighting fixture 1, the first reflecting surface 12 a 1 and the second reflecting surface 12 a 2 are formed by a part of the first ellipse A. On the other hand, in the lighting fixture 4 shown in FIG. 10A, the shape of at least one of the first reflecting surface 12c1 and the second reflecting surface 12c1 (both in the illustrated example) in the cross section is the center line Cn toward the upper side. It was formed in a linear shape close to.
Thereby, the lighting fixture 4 can implement | achieve orientation as shown to FIG. 10 (A).

  Next, the lighting fixture 5 shown in FIG. 10 (B) is a lamp main body 10B by changing the shape of a part of the lamp main body 10 in the lighting fixtures 2 and 3 shown in FIG. 8 or FIG. Other configurations are the same as those of the lamp body 10.

That is, in the lighting fixtures 2 and 3, the first reflecting surface 12 a 1 and the second reflecting surface 12 a 2 are formed by a part of the first ellipse A. On the other hand, in the lighting fixture 5 shown in FIG. 10B, the shape of at least one of the first reflecting surface 12c1 and the second reflecting surface 12c1 in the cross section (both in the illustrated example) is centerline Cn toward the upper side. It was formed in a linear shape close to.
Thereby, the lighting fixture 5 can implement | achieve orientation as shown to FIG. 10 (B).

  Furthermore, in place of these first reflecting surfaces 12c1 and 12c2, a first reflecting surface 12d1 having a linear shape parallel to the center line Cn as shown by a two-dot chain line in FIG. It is good also as the 2nd reflective surface 12d2.

  As described above, the shapes of the first reflecting surface and the second reflecting surface can be appropriately selected according to a desired light distribution, and the shapes of the first reflecting surface and the second reflecting surface are also possible. May have the same shape or a combination of different shapes.

1, 2, 3, 4, 5 Lighting fixture 10, 10A, 10B Lamp body 11 Body 11d, 53b Diffuser holding groove 12 Reflector 12a1, 12c1, 12d1 First reflecting surface 12a2, 12c2, 12d2 Second reflecting surface 12b Second reflecting Surface, lower end of second reflecting surface 13 Radiation fin 15 Light source 16, 54 Diffuser plate 20, 50A, 50B, 50B 'Cone 22a1, 52a Third reflecting surface 22a2, 53a Fourth reflecting surface A First ellipse (ellipse)
A1 Long axis of the first ellipse Aa Upper focal point of the first ellipse Ab Ab Lower focal point of the first ellipse B Second ellipse B1 Long axis of the second ellipse Ba Upper focal point of the second ellipse Bb Lower focus of second ellipse Cm Reference line Cn Center line K Light exit

Claims (9)

A body to which a light source is attached;
A reflector that directly reflects light from the light source;
A radiation fin that radiates heat transmitted from the light source through the body, and
The body, the reflector and the radiating fin are integrally formed by a metal extrusion process or a drawing process, and are formed in a long length in the extrusion direction or the drawing direction.
The lamp body. The side on which the light source is attached is the upper side, the light emission port side of the reflector is the lower side, and a straight line extending in the vertical direction through the center of the light source in a cross section orthogonal to the longitudinal direction of the lamp body If the center line of the lamp body,
The reflector is
A first reflecting surface located on one side with respect to the center line and a second reflecting surface located on the other side;
The first reflecting surface reflects light from the light source toward the other side obliquely downward, and the second reflecting surface reflects light from the light source toward the one side obliquely downward;
The lamp body according to claim 1. The reflector is
The shape of at least one of the first reflecting surface and the second reflecting surface in the cross section is a part of an ellipse whose major axis is directed in the vertical direction.
The lamp body according to claim 2. The ellipse is
The long axis is disposed on the center line;
The upper focal point is located in the center of the light source;
The lamp body according to claim 3. The ellipse is
The lower focal point is disposed below the light exit of the reflector,
The lamp body according to claim 4. The reflector is
The shape of at least one of the first reflecting surface and the second reflecting surface in the cross section is a linear shape closer to the center line toward the upper side.
The lamp body according to claim 2. The reflector is
The shape of at least one of the first reflecting surface and the second reflecting surface in the cross section is a straight line parallel to the center line.
The lamp body according to claim 2. The body is
A diffusion plate holding groove for horizontally holding a diffusion plate covering the light exit port is formed so as to be adjacent to lower ends of the first reflection surface and the second reflection surface,
The lamp body according to any one of claims 2 to 7, characterized in that A lamp body,
A light source attached to the lamp body;
An easy-to-removable cone attached to the lamp body,
The lamp body is the lamp body according to any one of claims 1 to 8,
A lighting apparatus characterized by that.

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