JP2011040299A - Wall washer type luminaire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wall washer type luminaire that can irradiate an upper edge on a wall surface with light and that prevents a pattern, such as a scallop, from being formed on the wall surface. <P>SOLUTION: A concave surface 31 of a reflector 30 provided in a luminaire body 10 is formed in a shape formed from one portion of a rotation ellipsoidal face obtained by rotating an ellipse in which a lower end of a major axis X slants toward the wall surface W, and opened toward the side of the wall surface W. An opening 32 of the reflector 30 includes: a lower end opening edge 32a that is parallel to the bottom face 80a of a ceiling board 80 and is cut by a plane H crossing the major axis X at the portion of a first focus F1; and a slant opening edge 32b that crosses the major axis X at a point M between two focuses F1, F2 and is cut by an inclined plane S crossing the plane H. The reflector 30 is disposed so that the height of the first focus F1 becomes nearly the same as that of a lower end edge 73 of a mounting tool 70, and an emission section 12a of a lamp 12 is disposed in the second focus F2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a lighting fixture, and more particularly to a wall washer-type lighting fixture that performs wall washer lighting that irradiates a wall surface with light.

  Wall washer illumination is generally performed as an indirect illumination method, and is an illumination method that uniformly irradiates light on the entire wall surface (vertical wall surface) as if it was washed away with water.

  In this way, by brightly illuminating the wall that is easy to enter the viewer's field of vision, for example, even if the overall brightness of the space is kept low and a calm atmosphere is produced, the entire space that can be obtained sensuously As the brightness of the building increases, the expanse of the space is emphasized, and the atmosphere of the place can be improved and the sense of luxury can be enhanced. It is widely used as a lighting technique.

  As a lighting fixture for performing such wall washer lighting, various downlights called “wall washer type” capable of irradiating light in the direction of the wall surface have been proposed, and an example is shown in FIG. The downlight 100 (see Patent Document 1) that can be mounted on the ceiling with the light irradiation direction inclined toward the wall surface as shown in FIG. As shown in FIG. 11, a curved surface of a part of the reflector 130 is formed in a shape different from the other part and provided with an auxiliary reflecting surface 131 that can reflect light in the wall surface direction (Patent Document 2). In addition, a reflector (Patent Document 3) or the like is proposed in which an auxiliary reflector 131 ′ capable of irradiating light toward the wall surface is provided in the reflector 130.

JP 2000-90708 A JP 2003-157708 A JP-A-8-7629

  In the wall washer lighting mentioned above, in order to enhance the sensuous brightness and emphasize the expanse of the space to improve the atmosphere of the place and enhance the sense of quality of the place, the entire wall surface in the height and width directions is used. On the other hand, it is necessary to irradiate the light uniformly, and even if there is a bright part due to the light partially hitting the wall surface, such an illumination method simply hits the light. We cannot expect the effects obtained by wall washer lighting, such as improving the overall brightness of the space, emphasizing the spaciousness of the space, improving the atmosphere of the venue, and enhancing the luxury of the venue.

  In this way, one of the causes that hinders the uniform light irradiation on the entire wall surface required for wall washer lighting is that depending on the luminaire mounted on the ceiling, the upper end of the wall surface (near the boundary with the ceiling) It is difficult to irradiate with light.

  That is, in the above-described conventional downlight structure, since the lighting fixture is embedded in the opening formed in the ceiling plate, the lamp as the light source and the reflector that reflects the light from the light source are installed. Is arranged at a position higher than the bottom surface (surface on the indoor side) of the ceiling board.

  As a result, even if the luminaire is mounted with an inclination, or an auxiliary reflecting surface or auxiliary reflecting mirror is provided, the light does not reach the upper end of the wall surface, and as a result, the entire wall surface is illuminated uniformly. Can not be.

  As a method for solving such problems, it is conceivable to arrange a part of the lamp or reflector as the light source at a position lower than the bottom surface of the ceiling plate (the surface on the indoor side). In this case, since the lighting fixtures are greatly pushed toward the indoor side, the presence of the lighting fixtures becomes conspicuous when looking up at the ceiling from the indoor side, and the indoor landscape is impaired.

  For this reason, a wall having a structure capable of irradiating light to the upper end of the wall surface while being inconspicuous as existing lighting equipment such as downlights when viewed from the indoor side. A washer-type lighting fixture is desired.

  Another reason for hindering uniform light irradiation on the entire wall surface is that the contour of the light irradiated on the wall surface forms a pattern called “scallop”.

  The cause of the occurrence of this scallop will be described with reference to FIG. 12. As shown in FIG. 12 (A), the downlight 100 generally feels unpleasant glare due to the light directly from the lamp 112 entering the field of view. In order to prevent this, a range where the light from the lamp 112 is not irradiated is set as a so-called “cut-off angle” as indicated by θ in FIG.

  If the light irradiation range by such a downlight 100 is represented three-dimensionally, it becomes a conical irradiation range as shown in FIG. 12 (B), and this downlight 100 is attached to the ceiling near the wall surface to irradiate the wall surface W. In this case, the outline of the light formed on the wall surface W has a cross-sectional shape obtained when the cone shown in FIG. 12B is cut along the surface L1 ′. For example, a plurality of downlights 100 are arranged in the width direction of the wall surface W. When arranged side by side and attempting to irradiate light to the entire width direction of the wall surface W, a saw-tooth pattern that impairs the landscape is formed on the wall surface as shown in FIG.

  Even if the downlight 100 is attached to the ceiling in a state inclined toward the wall surface W, the contour of the light formed on the wall surface when the downlight 100 is cut by the plane L2 ′ in FIG. It is only the cross-sectional shape obtained in the above, and simply mounting the downlight inclined does not have the effect of preventing the occurrence of scallops.

  Further, as shown in the above-mentioned Patent Documents 2 and 3, even in the configuration of a downlight provided with an auxiliary reflecting surface and an auxiliary reflecting mirror, the auxiliary reflecting surface and the auxiliary reflecting mirror simply have a cutoff angle θ on the wall surface side. In the same way, a parabolic pattern (scallop) is formed on the wall surface W.

  If an attempt is made to prevent the occurrence of scallops in the configurations shown in Patent Documents 2 and 3, the auxiliary reflecting surface and the reflecting surface of the auxiliary reflecting mirror are formed with extremely complicated shapes such as forming different curvatures for each part. It is necessary and its design and manufacture are difficult.

  As described above, according to the conventional wall washer type downlight, it is impossible to perform wall washer illumination without causing scallops. For example, a concave groove is formed in the ceiling at the upper part of the wall surface. Wall washer lighting is also performed by installing and installing lighting fixtures using a long fluorescent lamp as a light source.

  Although this method can prevent the occurrence of the scallop described above, it requires a large-scale construction such as forming a concave groove on the ceiling, which increases the cost, and in comparison with a downlight using a halogen lamp or the like as a light source. The above illumination method using a lamp as a light source has a drawback that it is difficult to obtain brightness.

  In addition, the light applied to the wall surface forms an annual ring-shaped striped pattern that occurs when the brightness changes from the center toward the outside, and even with such a striped pattern, the entire wall surface is illuminated with uniform brightness. I can't do that.

  Therefore, if the light irradiated to the wall surface is formed so as to move naturally as it goes from the center side to the outside, and the occurrence of the annual ring-shaped stripe pattern as described above can be prevented, a more uniform wall surface can be obtained. Light irradiation is possible.

  Therefore, the present invention has been made to eliminate the above-mentioned drawbacks of the prior art, and, similar to known downlights, etc., by mounting in a state of being embedded in the ceiling in the same manner as a known ceiling-mounted downlight. In addition to being able to be installed on the ceiling without disturbing the scenery from the indoor side, in addition to this, it is possible to irradiate light reliably to the upper end of the wall surface, To provide a wall washer-type luminaire capable of uniformly irradiating light on the entire wall surface by preventing the light irradiated on the wall surface from forming a scallop, preferably an annual ring-like striped pattern together with the scallop. With the goal.

  Hereinafter, means for solving the problem will be described together with reference numerals used in the embodiment for carrying out the invention. This symbol is intended to clarify the correspondence between the description of the claims and the description of the mode for carrying out the invention. Needless to say, it is used for the interpretation of the technical scope of the claims of the present invention. It is not used restrictively.

In order to achieve the above object, a wall washer-type luminaire 1 according to the present invention includes a cup-shaped reflector 30 and a luminaire main body 10 including a lamp 12 having a light emitting portion 12a disposed on the concave surface 31 side of the reflector 30. , And a mounting jig 70 attached to the ceiling plate 80 in a state where the lower end edge 73 is flush with the bottom surface 80a (interior side surface) of the ceiling plate 80 or slightly protrudes indoors from the bottom surface 80a, In the luminaire 1 that is mounted in an embedded state on the ceiling by attaching the luminaire main body 10 in the opening 74 of the attachment jig 70,
The concave surface 31 of the reflector 30 is formed by a part of a spheroidal surface obtained by rotating an ellipse whose lower end of the long axis X is inclined toward the wall surface W side about the long axis X. And an opening 32 that opens toward the wall surface W.
The opening 32 is a plane parallel to the bottom surface 80a of the ceiling board 80, and the first axis F1 of the two focal points F1 and F2 of the ellipse, which is on the lower end side of the major axis X, A lower end opening edge 32a cut at an intersecting plane H and an inclined opening edge 32b cut at an inclined surface S that intersects the major axis X and intersects the plane H between the two focal points F1 and F2 (point M). Have
The reflector 30 is disposed such that the lower end opening edge 32a is substantially the same height as the lower end edge 73 of the mounting jig 70, and
The light emitting portion 12a of the lamp 12 is disposed at a second focal point F2 on the upper end side of the long axis X of the ellipse (Claim 1).

  In the wall washer-type luminaire 1 having the above-described configuration, it is preferable that a large number of dimples 33 and 34 are formed on the entire surface of the concave surface 31 of the reflector 30 (Claim 2). In this case, the upper end of the inclined opening edge 32b Assuming a reference plane B that passes through the portion P3 and is orthogonal to the long axis X of the ellipse, it is positioned below the dimple 33 formed on the concave surface 31 positioned above the reference plane B. The dimple 34 formed on the concave surface 31 can be formed with a small diameter.

  Furthermore, it is preferable that the lamp 12 is inclined so that the axis of the lamp 12 coincides with the long axis X of the ellipse.

In addition, a light shielding wall 52 that covers the bottom of the lower end opening edge 32a of the reflector 30 and protrudes from the lower end opening edge 32a side toward the long axis X side and having an upper surface formed with a low reflectance is provided.
A line C that intersects the long axis X and connects the upper end portion P3 of the inclined opening edge 32b and the protruding end portion of the light shielding wall with respect to the bottom surface 80a of the ceiling plate 80 has a predetermined cut-off angle θ ( The light shielding wall 52 and the inclined opening edge 32b may be formed so as to be inclined at 55 ° in the embodiment (Claim 5).

  In this case, the frame 51 is formed in a substantially cylindrical shape, and the light shielding wall 52 for placing the lower end opening edge 32a of the reflector 30 on the lower end opening of the frame 51 is provided. A holder 50 having a locking portion 53 for locking the inclined opening edge 32 b of the reflector 30 is provided in the lighting fixture main body 10, and the holder 50 can be mounted in the mounting jig 70. (Claim 6).

  According to the configuration of the present invention described above, according to the wall washer type lighting fixture 1 of the present invention, the following remarkable effects could be obtained.

  A lower end opening edge 32a is formed by cutting the opening 32 of the reflector 30 having a concave surface 31 shape formed by a part of the spheroid and having an opening that opens toward the wall surface W by a plane H and a slope S. The inclined opening edge 32b is formed, and the lower end opening edge 32a of the reflector 30 is disposed so as to be substantially the same height as the lower end edge 73 of the mounting jig 70 (therefore, the first focus F1 is also disposed at substantially the same height). In addition, by arranging the light emitting portion 12a of the lamp 12 at the second focal point F2, in the lighting fixture 1 of the present invention, as shown by an arrow in FIG. 2, the lower end opening edge 32a of the concave surface 31 of the reflector 30. It is possible to irradiate the reflected light reflected by the portion toward the upper end position of the wall surface W in parallel with the ceiling plate 80. Boundary Until the, it is possible to provide a lighting device 1 can be reliably irradiated with light.

  Further, the structure of the reflector 30 described above provides a wall washer-type luminaire that does not cause scalloping of the light irradiated to the wall surface W, and as a result, can uniformly irradiate the entire wall surface W. I was able to.

  In addition, a configuration in which a large number of dimples 33 and 34 are formed on the concave surface 31 of the reflector 30, in particular, the dimple 34 formed on the concave surface 31 located below the reference surface B is a concave surface 31 located above the reference surface B. In the configuration having a smaller diameter than the dimple 33 formed in the above, it is possible to eliminate the generation of annual ring-like striped patterns caused by the brightness change that occurs from the center of the irradiation light toward the outside. The wall W can be illuminated more uniformly.

  Further, by tilting the axis of the lamp 12 so as to coincide with the long axis X of the ellipse, the space for arranging the lamp 12 can be reduced and the size of the reflector 30 can be made as small as possible.

  In the configuration in which the light shielding wall 52 covering the lower part of the lower end opening edge 32a of the reflector 30 is provided, the protruding length of the light shielding wall 52, the arrangement of the upper end portion P3 of the inclined opening edge 32b, and therefore the inclination of the inclined opening edge 32b. By adjusting, the light irradiation range (cut-off angle θ) on the side opposite to the wall surface W to be irradiated could be set to a desired angle.

  The holder 50 formed by providing the above-described light shielding wall 52 for placing the lower end opening edge 32a of the reflector 30 and the engaging portion 53 for engaging the inclined opening edge 32b on the substantially cylindrical frame 51 is provided. In the structure provided in the luminaire main body 10, the reflector 30 can be held in the desired posture described above only by inserting the reflector 30 into the frame body 51 of the holder 50, and the adjustment work is troublesome. Etc. became unnecessary.

The whole sectional view of the lighting fixture of the present invention in the state where it was attached to the ceiling. The expanded sectional view of a reflector, a holder, and a fixture part. Sectional drawing of a reflector. The perspective view of a reflector. (A) of a holder is a plan view, (B) is a left side view, (C) is a front view, (D) is a right side view, and (E) is a rear view. (A) of a holder is a perspective view, (B) is a sectional view taken along line VI-VI in FIG. It is explanatory drawing of the principle which scallop is eliminated in the lighting fixture of this invention, (A) is a change of the irradiation range by the presence or absence of formation of a lower end opening edge, (B) is the irradiation range of the reflected light by the reflector provided with the lower end opening edge. FIG. The whole illuminating device sectional drawing which shows another embodiment of this invention. Explanatory drawing of the conventional wall washer type | mold downlight (example inclined toward the wall surface: It respond | corresponds to FIG. 1 of patent document 1). Explanatory drawing of the conventional wall washer type | mold downlight (example which provided the auxiliary reflective surface; corresponding to FIG. 1 of patent document 2). Explanatory drawing of the conventional wall washer type | mold downlight (example which provided the auxiliary | assistant reflective mirror: corresponding to FIG. 1 of patent document 3). It is explanatory drawing of the generation | occurrence | production principle of a scallop, (A) is explanatory drawing of the irradiation range by a general downlight, (B) is explanatory drawing which represented the irradiation range of (A) in three dimensions, (C) is a wall surface The schematic diagram of the outline (scallop) of the light projected on.

  Next, the wall washer type lighting device 1 of the present invention will be described with reference to the attached drawings.

  In FIG. 1, reference numeral 1 denotes a wall washer-type lighting fixture of the present invention. This lighting fixture 1 has a reflector 30 at the lower end of a cover 11 that houses a lamp 12 that is a light source and a socket 13 to which the lamp 12 is attached. A luminaire main body 10 formed by attaching the held holder 50 and a ring-shaped attachment jig 70 attached to the opening 81 formed in the ceiling plate 80 are provided. The lighting fixture body 10 is inserted into the opening 74 from the indoor side, and the fixture 50 of the lighting fixture body 10 is locked in the mounting jig 70 so that the fixture can be attached in a state embedded in the ceiling. It is configured.

  Among them, the luminaire main body 10 described above accommodates the socket 13 to which the lamp 12 as the light source is attached on the upper end side of the cover 11 described above, and the lamp 12 is attached to the socket 13, thereby The lamp 12 is arranged at a predetermined position.

  The upper end of the holder 50 that holds the reflector 30 can be connected to the lower end portion of the cover 11, and the lower end of the cover 11 is held with the reflector 30 held in the holder 50. By connecting the holder 50 to the reflector 30, the reflector 30 is disposed and fixed in the space formed by the connection of the cover 11 and the holder 50, and the lamp 12 is placed at a predetermined position on the concave surface 31 side of the reflector 30. The light emitting unit 12a can be arranged.

  As shown in FIG. 1, the lower end edge of the cover 11 is inclined with respect to the axis of the lamp 12 accommodated therein, and therefore has a cylindrical frame 51 which will be described later. When the lower end edge of the cover 11 is connected to the upper end of the holder 50, the cover 11 and the lamp 12 accommodated in the cover 11 are attached to the holder 50 and the holder 50 as shown in FIG. It is configured so that it can be attached to the ceiling plate 80 attached via the tool 70 in a state inclined at a predetermined angle (in the example shown, the axial center of the lamp 12 is inclined 55 °).

  The reflector 30 provided in the luminaire main body 10 reflects light generated by the lamp 12 in a predetermined direction, and includes a concave surface 31 formed as a reflective surface, and the concave surface of the reflector 30. The light emitting part 12a of the lamp 12 is arranged on the 31 side.

  As shown in FIGS. 1 to 3, the concave surface 31 of the reflector 30 is formed by a part of a spheroid obtained by rotating the ellipse about the major axis X of the ellipse. The surface is attached in such a posture that the lower end side of the long axis X faces the wall surface (vertical wall) W side to be irradiated with light, and an opening 32 that opens toward the wall surface W side is formed. Yes.

  In general, the “major axis” of an ellipse refers to a line passing through the two focal points of the ellipse inside the ellipse, but for convenience of explanation, the major axis X shown in the figure is the major axis in the above sense. A part or this is expressed as an extended line.

  In this example, the major axis X of the ellipse is inclined so as to have an inclination of 55 ° with respect to the ceiling plate 80. However, the inclination angle of the major axis X is not limited to the example shown in the figure, and It can be changed as appropriate according to the distribution of the light to be irradiated, the mounting position of the lighting fixture (distance from the wall surface), etc. As an example, in the example shown in FIG. is doing.

  As described above, the opening 32 of the reflector 30 having the concave surface 31 formed by a part of the spheroid having the major axis X inclined is provided with a lower end opening edge 32a and an inclined opening edge 32b as shown in FIGS. The two opening edges form the edge.

  Of these, the lower end opening edge 32a is a plane parallel to the bottom surface 80a of the ceiling plate 80 as shown in FIGS. 1 and 2, and of the two focal points F1 and F2 of the ellipse, the long axis X This is an edge portion obtained by cutting the spheroidal surface by a virtual plane H that intersects with the long axis X at the first focal point F1 portion on the lower end side of the lens.

  1 to 4, the inclined opening edge 32b described above intersects the long axis X of the ellipse at a predetermined point M between the first and second focal points F1 and F2, and the plane H. This is an edge portion obtained by cutting the spheroid with a virtual slope S intersecting.

  The range of the lower end opening edge 32a and the inclined opening edge 32b will be described with reference to FIG. 4. The portion from the point P1 through the point P2 to the point P1 ′ is the lower end opening edge 32a, and the point P1 The portion extending from point P3 to point P1 ′ is the inclined opening edge 32b described above.

  The dimples 33 and 34 are preferably formed on the concave surface 31 of the reflector 30, and when the light reflected by the reflector 30 is projected onto the wall surface by the formation of the dimples 33 and 34, the dimples 33 and 34 are formed outside from the center side of the light. The change in brightness up to the point of the natural transition is prevented, and the formation of annual ring stripes on the projection surface is prevented.

  The dimples 33 and 34 may be formed so as to form the same dimple over the entire concave surface 31 of the reflector 30, but in this embodiment, as shown in FIG. Assuming a reference plane B that passes through the upper end portion P3 of the optical axis and is orthogonal to the major axis X of the ellipse, the dimple 33 formed on the concave surface 31 positioned above the reference plane B is more than the reference plane B. The dimple 34 formed on the concave surface 31 positioned below is formed with a small diameter.

  In FIG. 3, the dimples 33 and 34 are displayed only on a part of the concave surface 31, and the display of the dimples 33 and 34 in other parts is omitted.

  The sizes of the dimples 33 and 34 are formed by using, as an example, a dimple 33 formed on the concave surface 31 on the upper side with respect to the reference surface B described above using a convex punch of R8 mm and φ3 mm, and below the reference surface B. As an example, the dimple 34 formed on the concave surface 31 is formed using a convex punch of R8 mm and φ1.5 mm.

  The dimples 33 and 34 are preferably formed without gaps on the entire concave surface 31 of the reflector. For example, each dimple is formed in a hexagonal shape as shown in FIG. A dimple may be formed.

  However, the dimples 33 and 34 formed on the concave surface 31 are not necessarily formed regularly as shown in the figure, and may be formed randomly. In the present embodiment, Dimples 34 formed on the concave surface 31 positioned below the reference surface B are randomly formed.

  Reference numeral 35 in FIGS. 1 to 3 denotes a lamp insertion opening provided in the reflector 30, and the lower end of the cover 11 is connected to the upper end of the holder 50 in a state where the reflector 30 is held by the holder 50 described later. Then, the lamp 12 attached to the socket 13 provided in the cover 11 is inserted into the concave surface 31 side of the reflector 30 through the lamp insertion port 35, and the light emitting part 12a is disposed at the second focal point F2 of the ellipse. It has come to be.

  The reflector 30 configured as described above is arranged such that the lower end opening edge 32a is substantially the same height as a lower end edge 73 of a mounting jig 70 described later attached to the ceiling plate 80.

  Such an arrangement of the reflector 30 may be realized by, for example, fixing the reflector 30 in the above-described cover 11 so as to be the above-described arrangement, but in the present embodiment, as described above. In this state, the reflector 30 is housed in a holder 50 attached to the lower end of the cover 11, and in this state, the lower end of the cover 11 is connected to the upper end of the holder 50. The arrangement of the reflector 30 described above can be realized by locking in the 70.

  As shown in FIGS. 5 and 6, the holder 50 includes a light shielding wall 52 for placing the lower end opening edge 32a of the reflector 30 on the lower end of a frame 51 formed in a substantially cylindrical shape. A locking portion 53 having an inclined surface that abuts the inclined opening edge 32b provided in the reflector 30 is provided in the body 51 (see FIGS. 5A, 6A, and 6B). When the reflector 30 is inserted into the frame body 51 of the holder 50 so that the lower end opening edge 32a is placed on the light shielding wall 52 and the inclined opening edge 32b contacts the inclined surface of the locking portion 53. , The reflector 30 can be positioned in a state necessary to achieve the above-described arrangement.

  The light shielding wall 52 provided in the holder 50 is configured to partially close the opening 32 of the reflector 30 below the lower end opening edge 32a when the lower end opening edge 32a of the reflector 30 is placed. In addition to the function of holding and positioning the reflector 30 as described above, the direct light from the lamp 12 and a part of the reflected light from the reflector 30 are shielded so that the light is irradiated on the side opposite to the wall surface W. The irradiation angle (cut-off angle θ) is set to a predetermined angle (see FIGS. 1 and 2).

  As described above, in order to realize the light shielding by the light shielding wall 52, for example, a matte black paint is applied to the upper surface of the light shielding wall 52 (the surface on which the lower end opening edge 32a of the reflector 30 is placed). , The reflectance of this surface is lowered.

  In the present embodiment, in addition to applying the matte black paint, a serrated irregularity as shown in FIG. 2 is formed on the upper surface of the light shielding wall 52, and the light incident on this surface is completely absorbed by the black paint. Even if it is partially absorbed without being absorbed, this light can be diffused and diffused.

  The light shielding wall 52 closes the lower end opening of the frame 51 of the holder 50 within a range in which necessary illumination light can be irradiated indoors. In the illustrated embodiment, the light shielding wall 52 is intermediate between the lower end opening edges 32a of the reflector 30. In the portion located inside the point P2 (position P4 in FIG. 5A), the projection length with respect to the first focal point F1 side is maximized, and the projection length is gradually shortened as approaching both ends. [See FIGS. 5A and 5E].

  Then, as shown in FIGS. 1 and 2, the inclination of the line C passing through the upper end P3 of the inclined opening edge 32b of the reflector 30 and intersecting the major axis X of the ellipse and entering one point P4 on the edge of the light shielding wall The protruding length of the light shielding wall 52 and / or the inclination of the inclined opening edge 32b is determined so that the cut-off angle θ of the light irradiated on the side opposite to the wall surface W becomes a predetermined angle. .

  Here, since the inclination of the inclined opening edge 32b can be changed by setting the cut-off angle θ, the inclined opening edge 32b may be formed in a direction perpendicular to the bottom surface 80a of the ceiling body 80, for example.

  In the embodiment shown in FIG. 1, the protruding length of the light shielding wall 52 and the inclination angle of the inclined opening edge 32b of the reflector 30 are set so that the aforementioned cutoff angle θ is 55 °. The cut-off angle θ can be set at various angles depending on the application, installation location, etc. of the luminaire 1. For example, while using the same structure as the reflector 30 described above, the light shielding wall 52 is used. A plurality of holders 50 having different protrusion lengths may be prepared, and the setting of the cut-off angle θ may be changed by exchanging the holders 50.

  In the example shown in FIGS. 1 and 2, the light shielding wall 52 is projected toward the first focal side F1 so as to be substantially parallel to the bottom surface 80a of the ceiling plate 80. For example, as shown in FIG. 8, the light shielding wall 52 may be provided so as to protrude obliquely downward from the lower end edge of the frame 51, and if the cutoff angle θ can be set to a predetermined angle, The structure is not limited.

  However, in the case where the light shielding wall 52 is inclined downward as shown in FIG. 8, when the lighting fixture 1 installed from the indoor side is observed, the presence of the light shielding wall 52 causes the lighting fixture to exist. 1 is conspicuous and may disturb the indoor landscape. Therefore, as shown in FIGS. 1 and 2, the light shielding wall 52 is preferably provided so as not to protrude significantly downward from the lower edge of the frame 51. It is preferable.

  In the illustrated embodiment, the above-described locking portion 53 that enables positioning of the reflector 30 by contacting the inclined opening edge 32b of the reflector 30 corresponds to the inclination angle of the inclined opening edge 32b of the reflector 30. A locking portion 53 having a sloped inclined surface formed at an angle is provided.

  As shown in FIGS. 5 (A) and 6 (A), the locking portion 53 is connected at its upper end to a notched arc-like tongue piece 54 protruding from the inner wall of the frame 51. The piece 54 prevents a part of the light reflected by the reflector 30 from being irradiated on the indoor side (see FIG. 2).

  Below the tongue piece 54, there is provided a reflecting plate 55 that is crescent shaped in a rear view (see FIG. 5E) and is curved so as to bulge upward at the center side. In addition, by forming the bottom surface side of the reflection plate 55 as a reflection surface, for example, a mirror surface, for example, out of the light reflected by the concave surface 31 of the reflector 30 in the vicinity of the lower end opening edge 32a, it is parallel to the ceiling plate 80 by diffusion. The brightness in the direction directly below the luminaire 1 is increased by reflecting diffused light or the like deviating from the appropriate irradiation direction to the indoor side.

  In FIG. 5 and FIG. 6, reference numeral 56 denotes a cooling air introduction path, and the cooling air for cooling the reflector 30 and the lamp 12 can be introduced through the cooling air introduction path 56. is doing.

  The holder 50 configured as described above is formed on the ceiling plate 80 via the ring-shaped mounting jig 70 in a state where the reflector 30 is accommodated therein and the lower end portion of the cover 11 is connected to the upper end. It is mounted in the opening 81.

  The mounting jig 70 includes a cylindrical portion 71 formed in a substantially cylindrical shape and a flange portion 72 that protrudes in the outer peripheral direction from the lower end opening edge of the cylindrical portion 71. Is inserted into the opening 81 formed in the ceiling plate 80 from the indoor side until the flange portion 72 hits the bottom surface 80a of the ceiling plate 80, the support leg 75 (see FIG. 8) formed by a leaf spring or the like is attached to the ceiling plate 80. Locked to the periphery of the opening 81 on the upper surface side and formed on the ceiling plate 80 by, for example, screwing the mounting jig 70 to the ceiling plate 80 by the support leg 75 or in addition to the support leg 75. It is fixed in the opening 81.

  Thus, in the illustrated example, the lower end edge 73 of the mounting jig 70 is disposed at a slightly lower position than the bottom surface 80 a of the ceiling plate 80 by the thickness of the flange portion 72.

  However, as the mounting jig 70, one having a configuration not provided with the flange portion 72 described above is used, and the lower end edge 73 of the mounting jig 70 is exactly the same height as the bottom surface 80a of the ceiling plate 80. It is good also as what attaches so that it may become.

  The cylindrical portion 71 of the mounting jig 70 is formed to have an inner diameter into which the cover 11 and the holder 50 can be inserted, and the luminaire main body 10 is inserted with the cover 11 facing upward from the indoor side. When the holder 50 portion of the lighting fixture body 10 is inserted to a predetermined position, the outer periphery of the holder 50 can be locked in the cylindrical portion 71.

  In the embodiment shown in FIGS. 1 and 2, the upper end portion of the leaf spring 76 provided on the inner periphery of the cylindrical portion 71 of the mounting jig 70 is continuously connected to the outer periphery of the frame body 51 of the holder 50 in the circumferential direction. The holder 50 is configured to be locked at a predetermined position in the mounting jig 70 by being locked to the locking step portion 57 formed in this manner, and the holder 50 is held at the position. When locked in the mounting jig 70, the above-described arrangement of the reflector 30 accommodated in the holder 50 is realized.

  The luminaire main body 10 configured as described above is inserted into the mounting jig 70 fitted and fixed in the opening 81 formed in the ceiling plate 80 as described above, and is attached to the ceiling in an embedded state. It is done.

  The attachment to the ceiling is attached to the ceiling at a predetermined distance according to the height of the wall surface W to be illuminated aiming at the wall washer effect, and the wall surface to be irradiated at the lower side in the tilt direction of the luminaire body 10. Install so that W is placed.

  As an example, in the lighting fixture 1 described with reference to FIG. 1, when irradiating light over the entire wall height of 3000 mm, it is attached to the ceiling at a position approximately 1200 mm away from the wall surface.

  In the luminaire 1 of the present invention attached in this way, the concave surface 31 of the reflector 30 described above is formed by a part of the spheroidal surface as described above, so that the two focal points F1 and F2 of the ellipse are formed. The light emitted from either one and reflected by the concave surface 31 is incident on the other focal point, and as described above, the light fixture 12a of the lamp 12 is arranged at the second focal point F2 according to the present invention. 1, the light emitted from the lamp 12 and reflected by the concave surface 31 is incident on the first focal point F1, as indicated by an arrow in FIG.

  And since the reflector 30 provided in the lighting fixture 1 of this invention has the lower end opening edge 32a arrange | positioned at the substantially same height as the lower end edge 73 of the attachment jig 70, it is the same plane as this lower end opening edge 32a. The first focal point F <b> 1 on H is also disposed at substantially the same height as the lower end edge 73 of the mounting jig 70.

  And since the light emission part 12a of the lamp | ramp 12 is arrange | positioned in the 2nd focus F2, the light which injected from the lamp | ramp 12 and reflected by the concave surface 31 of the reflector 30 in the vicinity of the lower end opening edge 32a is , Passes through the first focal point F1, proceeds parallel to the ceiling plate 80, and is irradiated onto the wall surface W.

  As a result, according to the luminaire 1 of the present invention, light can be irradiated to the upper end of the wall surface W near the boundary with the ceiling (see FIG. 2).

  Moreover, in the reflector 30 provided in the lighting fixture 1 of this invention, it can prevent that the light irradiated with respect to the wall surface W forms scallop by the structure which provided the lower end opening edge 32a mentioned above. It has become.

  Here, considering an irradiation range of light reflected by the reflector 30 in which the concave surface 31 is formed by a part of the spheroid, the reflector 30 does not have a portion corresponding to the lower end opening edge 32a of the present invention. In this case, the irradiation range by the reflector is an isosceles triangle range having the first focal point F1 as a vertex, as shown by a solid line in FIG.

  However, as described above, the reflector 30 employed in the lighting fixture 1 of the present application includes the lower end opening edge 32a formed by cutting along the plane H that intersects the long axis X at the first focal point F1. In addition, the light irradiation range by the reflector 30 having such a lower end opening edge 32a changes to the state indicated by the broken line in FIG.

  Thus, if the irradiation range of the light reflected by the reflector 30 having the lower end opening edge 32a is three-dimensionally represented, it is as shown in FIG. The shape becomes.

  And in the lighting fixture 1 of this invention, since the plane H shown in FIG.7 (B) is a thing parallel to the bottom face 80a of the ceiling board 80, the light irradiated with respect to the wall surface W is the light. 7B corresponds to a cross-sectional shape obtained by cutting the notch cone shown in FIG. 7B along a plane orthogonal to the plane H, and as a result, the formation of scallops on the wall surface W is completely prevented. It has become something that can be.

  In addition, in the configuration in which the dimples 33 and 34 are formed on the concave surface 31 of the reflector 30, the brightness transition from the center of the irradiation light toward the outside becomes natural, and as a result, the light irradiated on the wall surface W is changed. It is also possible to prevent the formation of annual ring-like striped patterns.

  In particular, as described with reference to FIG. 3, the size of the dimple 34 formed on the concave surface 31 positioned on the lower side is different from the dimple 33 formed on the concave surface 31 positioned on the upper side with respect to the reference plane B. In a configuration formed as a smaller one, the above-described brightness transition can be made more natural, and as a result, the occurrence of annual ring-like stripes can be almost completely prevented. did it.

  Thus, according to the luminaire 1 of the present invention, the cutting position of the single reflector 30 in which the concave surface 31 is formed by a part of the spheroid surface is devised, and further, the dimples 33 and 34 are provided on the concave surface 31. By forming the reflector, as described in the prior art, it is only possible to simplify the reflector structure as compared with a configuration in which an auxiliary reflecting surface is provided on the reflector or an auxiliary reflecting plate is provided in the reflector. Nonetheless, it is possible to achieve light irradiation, prevention of scalloping, and prevention of generation of annual ring-like stripes, which is difficult with conventional lighting fixtures.

  Moreover, in the lighting fixture 1 of the present invention formed as described above, when the ceiling is looked up from the indoor side, the presence of the lighting fixture does not stand out, and the appearance is similar to that of a known downlight in the installed state. It has become something that does not disturb the indoor landscape.

DESCRIPTION OF SYMBOLS 1 (Wall washer type) Lighting fixture 10 Lighting fixture main body 11 Cover 12 Lamp 12a Light emission part 13 Socket 30 Reflector 31 Concave surface 32 Opening 32a Lower end opening edge 32b Inclined opening edge 33,34 Dimple 35 Lamp insertion port 50 Holder 51 Frame 52 Light shielding wall 53 Locking portion 54 Tongue piece 55 Reflector plate 56 Cooling air introduction path 57 Locking step portion 70 Mounting jig 71 Cylindrical portion 72 Flange portion 73 Lower end edge 74 Opening 75 Support leg 76 Plate spring 80 Ceiling plate 80a Bottom surface ( Indoor side of the ceiling board)
81 Aperture W Wall H Plane S Slope B Reference plane C Cutoff angle line θ Cutoff angle 100 Downlight (lighting fixture)
112 lamp 130 reflector 131 auxiliary reflecting surface 131 'auxiliary reflecting plate

Claims (6)

A luminaire main body having a cup-shaped reflector, a lamp having a light emitting portion disposed on the concave side of the reflector, and a state in which a lower end edge is flush with the bottom surface of the ceiling plate or slightly protrudes indoors from the bottom surface In a lighting fixture that is mounted in a ceiling state by mounting the lighting fixture main body in the opening of the mounting jig,
The concave surface of the reflector is formed by a part of a spheroidal surface obtained by rotating an ellipse whose lower end of the long axis is inclined toward the wall surface side about the long axis, and on the wall surface side. Has an opening that opens toward
The opening is a lower end opening edge which is a plane parallel to the bottom surface of the ceiling board and cut by a plane intersecting the major axis at a first focal portion on the lower end side of the major axis among the two focal points of the ellipse And an inclined opening edge that is cut by a slope that intersects the major axis and intersects the plane between the two focal points,
The reflector is arranged so that the lower end opening edge is substantially the same height as the lower end edge of the mounting jig,
A wall washer-type lighting device, wherein the light emitting portion of the lamp is disposed at a second focal point on the upper end side of the long axis of the ellipse.   The wall washer-type lighting device according to claim 1, wherein a large number of dimples are formed on the entire concave surface of the reflector.   Assuming a reference plane that passes through the upper end of the inclined opening edge and is orthogonal to the long axis of the ellipse, it is positioned below the dimple formed on the concave surface located above the reference plane. 3. The wall washer-type lighting device according to claim 2, wherein the dimples formed on the concave surface have a small diameter.   The wall washer type lighting fixture according to any one of claims 1 to 3, wherein the lamp is inclined so that an axis of the lamp coincides with a long axis of the ellipse. Covering the bottom of the lower end opening edge of the reflector, and providing a light-shielding wall that protrudes from the lower end opening edge side toward the major axis side and has an upper surface formed with low reflectance,
The light shielding is performed such that a line that intersects the long axis X and connects the upper end of the inclined opening edge and the protruding side end of the light shielding wall is inclined at a predetermined cut-off angle with respect to the bottom surface of the ceiling plate. The wall washer type lighting fixture according to any one of claims 1 to 4, wherein a wall and the inclined opening edge are formed.   A frame body having a substantially cylindrical shape, the light shielding wall for mounting the lower end opening edge of the reflector on the lower end opening of the frame body, and the inclined opening edge of the reflector in the frame body 6. The wall washer type lighting fixture according to claim 5, wherein a holder having a locking portion for locking the lamp is provided in the lighting fixture main body, and the holder can be attached to the mounting jig.

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