JP5122913B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting device that is attached to a ceiling surface, a wall surface, a floor surface, and the like, and is used for a product effect in a commercial space and a space effect in an architectural space.

  2. Description of the Related Art Conventionally, there has been provided a lighting fixture that is attached to a ceiling or the like and in which the direction of light irradiation can be freely changed (see, for example, Patent Document 1).

In addition, as a light source of such an illumination direction variable illumination apparatus, an illumination apparatus using a metal halide lamp is also provided. As shown in FIG. 5, the lighting fixture A has a substantially circular box-shaped shade 1 whose one surface (the front surface in FIG. 5A) is open, and a reflecting surface 2 c is a paraboloid in the shade 1. The reflecting mirror 2 which consists of is accommodated. Also, in the shade 1, a single-piece lamp 3 made of a metal halide lamp has a lamp axis (a horizontal axis in FIG. 5A) substantially parallel to the opening surface of the paraboloid, and The lamp shaft is disposed at the focal point of the paraboloid.
JP 2002-373522 A (paragraph [0014] -paragraph [0016] and FIGS. 1 to 2)

  In the lighting fixture A shown in FIG. 5 described above, since a metal halide lamp is used as the light source, a compound that is not in a volatile state such as iodide enclosed in the arc tube (inner tube) 3a is a lower end portion of the arc tube 3a. The precipitate is deposited and stays in P, but since this precipitate is a yellowish liquid, the light irradiated from the lower end P of the arc tube 3a through the precipitate (in FIG. 5B) Arrow B) is yellowish light. Thus, when the light from the luminaire A is reflected by the reflecting surface 2c and applied to the object, the object is partially yellowish and color unevenness occurs. It was.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a lighting fixture that reduces color unevenness by making the color of the irradiated light substantially uniform. is there.

  According to the first aspect of the present invention, at least a part of the reflecting surface has a parabolic surface formed by rotating a parabola around the axis of symmetry, a metal halide lamp is mounted, and the lamp axis of the metal halide lamp is a parabolic surface. The lamp socket, which is arranged so as to be substantially parallel to the opening surface, the mounting portion attached to the mounted portion, the reflecting mirror and the lamp socket are internally provided, and are rotatably supported by the mounting portion around the lamp shaft. The lower end of the metal halide lamp is located at the focal point of the paraboloid forming the reflecting surface in a state where the shade is rotated and arranged so that the axis of symmetry of the parabola forming the paraboloid is substantially horizontal. As described above, a metal halide lamp is arranged.

  According to the first aspect of the present invention, in the state where the shade is rotated and arranged so that the axis of symmetry of the parabola forming the paraboloid is substantially horizontal, the lower end of the lamp is at the focal point of the paraboloid forming the reflecting surface. Since the metal halide lamp is arranged so as to be positioned, the light irradiated from the lower end of the metal halide lamp is reflected in the substantially horizontal direction by the reflecting surface of the reflecting mirror, and is irradiated from other parts and reflected by the reflecting surface. Since the color is relaxed by the light reflected in the oblique direction, the color of the light emitted from the lamp can be made substantially uniform, and therefore a lighting apparatus with reduced color unevenness can be provided. There is an effect.

  An embodiment of the present invention will be described with reference to FIGS. The lighting fixture A of this embodiment is a lighting fixture with variable irradiation direction that is attached to a wiring duct (attached portion) disposed on a ceiling or the like, for example, for product production in a commercial space or space production in an architectural space. It is used.

  As shown in FIGS. 1 to 3, the luminaire A includes a lamp socket 12 in which the lamp 3 is detachably mounted, and light irradiated from the lamp 3 to the side opposite to the illumination direction (front direction in FIG. 2). A reflecting mirror 2 for reflecting the lamp in the illumination direction, a shade 1 that houses the lamp 3 and the reflecting mirror 2, a ballast 8 that supplies lighting power to the lamp 3 via the lamp socket 12, and a ballast 8 A case 7 that is housed and detachably attached to the wiring duct, and a support arm 5 that supports the shade 1 by connecting the shade 1 and the case 7 to each other are provided.

  The shade 1 is, for example, a synthetic resin molded product, and is formed in a substantially circular box shape whose front side is open as shown in FIGS. 1 to 4, and the rotating shaft of the support arm 5 is disposed on the right side wall of the shade 1. A bearing portion 1a through which the portion 5b is inserted is provided. The bearing portion 1a is provided with a holding fitting (not shown) for holding the inserted rotating shaft portion 5b. The holding fitting holds the rotating shaft portion 5b, and the rotating shaft portion 5b is a bearing. It is prevented from falling off from the part 1a. Further, a rotation stopper (not shown) is provided in the vicinity of the bearing portion 1a on the inner peripheral surface of the shade 1, and a rotation restricting projection (not shown) provided on the rotation shaft portion 5b is provided on the rotation stopper. The rotation range of the shade 1 is regulated by rotating and locking. Further, a plurality of holding ribs 1c (only one is shown in FIG. 4A) for holding the reflecting mirror 2 are provided on the inner peripheral surface of the shade 1 along the circumferential direction, and the front surface of each holding rib 1c. Positioning protrusions 1d for positioning the reflecting mirror 2 by engaging with a notch 2e provided on the reflecting mirror 2 are integrally provided on the side. Each positioning projection 1d is provided with a fitting groove 1e into which a fixing spring 6 for fixing the reflecting mirror 2 to the shade 1 is fitted.

  Here, the lamp 3 used in the lighting fixture A of the present embodiment is, for example, a metal halide lamp having a single base, and has a straight tubular outer tube 3b formed of hard glass. A luminous tube (inner tube) 3a made of quartz glass in which a metal halide such as sodium iodide or scandium iodide is encapsulated in addition to mercury as a luminescent substance is accommodated, and the longitudinal direction of the luminous tube 3a (FIG. 1) is accommodated. (Left and right direction in (a)) Electrodes (not shown) for generating discharge are provided on both ends. Further, one end side (the left side in FIG. 1A) of the outer tube 3b is sealed, and a cap portion 3c that is electrically connected to the lamp socket 12 is integrally provided on the other end side.

  Thus, in this lamp 3, when lighting power is supplied from the ballast 8 via the lamp socket 12 between the two electrodes, electrons emitted from one electrode into the arc tube 3 a are transferred to the other electrode side. When they move, they collide with mercury atoms, sodium atoms, and scandium atoms, so that these atoms are excited, and light is emitted when these atoms return from the excited state to the ground state. As the metal halide lamp, a conventionally well-known one is adopted, and a detailed description thereof is omitted.

  The reflecting mirror 2 is made of, for example, metal, and has a reflecting surface 2c made of a paraboloid formed by rotating a parabola around the symmetry axis Y (see FIG. 1B), and is formed on the top 2d of the reflecting surface 2c. As shown in FIG. 1A, a horizontally long hole 2a is provided. Further, a portion of the reflecting surface 2c of the reflecting mirror 2 corresponding to the cap portion 3c of the lamp 3 is provided with a notch portion 2b for allowing the cap portion 3c to escape when the lamp 3 is mounted, and the outer peripheral edge of the reflecting surface 2c. In FIG. 2, a portion corresponding to each positioning projection 1d of the shade 1 is provided with a notch 2e that engages with the corresponding positioning projection 1d. Here, in the lighting fixture A of the present embodiment, the reflecting surface 2c of the reflecting mirror 2 is formed in a state where the shade 1 is arranged so that the axis of symmetry Y is substantially horizontal (that is, the state of FIG. 1A). The reflecting mirror 2 is formed so that the lower end portion P of the arc tube 3a of the lamp 3 is located at the focal point of the paraboloid (see FIG. 1B).

  Here, the procedure for attaching the reflecting mirror 2 to the shade 1 will be described with reference to FIGS. First, the reflecting mirror 2 is brought close to the shade 1 from the front side, and each of the notch portions 2e is engaged with the corresponding positioning projection 1d to place the reflecting mirror 2 on the front surface of the holding rib 1c (see FIG. 4B). ). Thereafter, when the fixed spring 6 (see FIG. 3) formed in a substantially arc shape having elasticity is bent and placed on the front side of the reflecting mirror 2 and released, the fixed spring 6 expands and each positioning is performed. The reflecting mirror 2 is fitted into the fitting groove 1e of the protrusion 1d, the reflecting mirror 2 is clamped between the fixing spring 6 and the holding rib 1c of the shade 1, and the reflecting mirror 2 is attached to the shade 1 (see FIG. 4C). .

  A front frame 4 formed in a substantially circular frame shape is attached to the opening of the shade 1, and the front frame 4 is fitted into the opening of the shade 1 from the front side, On the other hand, the front frame 4 is fitted to the shade 1 by rotating the front frame 4.

  Next, the ballast 8 is for supplying lighting power to the lamp 3 through the lamp socket 12, and is formed in a horizontally long, substantially rectangular parallelepiped shape, and has one end in the longitudinal direction (the left side in FIG. 3). ) Is provided with a plurality (two in this embodiment) of input terminals 8a, and on the other end side in the longitudinal direction (right side in FIG. 3), output terminals 8b corresponding to the input terminals 8a are provided. .

  As shown in FIG. 3, the ballast 8 is housed in a horizontally long, substantially rectangular box-shaped case 7 whose one surface (the upper surface in FIG. 3) is open, and one end side in the longitudinal direction of the opening of the case 7 (FIG. 3). A plug 9 is attached to the left side). The plug 9 has a plurality (two in this embodiment) to which commercial power is supplied by contacting a power supply unit (not shown) provided in a wiring duct (not shown) attached to the ceiling. A power supply terminal 9a, a substantially rectangular plate-shaped fixing bracket 9c for fixing the case 7 to the wiring duct, and a rotating lever 9b for rotating the power supply terminal 9a and the fixing bracket 9c are provided. A fixing portion 14 for fixing the case 7 to the wiring duct is integrally provided on the other end side in the longitudinal direction of the case 7 (on the right side in FIG. 3). The fixing portion 14 has a substantially rectangular plate shape. A fixing bracket 14a is rotatably provided. Each power supply terminal 9a is electrically connected to the corresponding input terminal 8a of the ballast 8 in the mounted state. Furthermore, a cover 10 provided with a plurality of (three in this embodiment) screw insertion holes 10a is attached to the upper surface of the case 7 in which the ballast 8 is accommodated. The three fixing screws 11 inserted through 10a are screwed to the case 7 together with the plug 9 to close the upper surface of the case 7 (see FIG. 2).

  Here, when attaching the case 7 to the wiring duct, first, the plug 9 and the fixing portion 14 are inserted into the wiring duct through the groove provided on the lower surface of the wiring duct, and the rotary lever 9b of the plug 9 is operated. The power supply terminal 9a and the fixture 9c are rotated 90 degrees. After that, when a fixing screw (not shown) provided on the fixing portion 14 is tightened with a tool from the outside of the wiring duct, the fixing bracket 14a rotates 90 degrees with the rotation of the fixing screw and comes into contact with the inner surface of the wiring duct. Thus, further rotation is restricted. Further, when the fixing screw is tightened from this state, the fixing metal fitting 14a moves to the case 7 side (the lower side in FIG. 2), whereby the wiring duct is clamped between the upper surface of the case 7 and the fixing metal fitting 14a. 7 is attached to the wiring duct. At this time, each power supply terminal 9a comes into contact with a corresponding power supply section in the wiring duct and is electrically connected.

  Next, the support arm 5 has a substantially L-shaped arm portion 5c as shown in FIGS. 1 to 3, and the lower surface of the case 7 is provided at one end side (the upper end side in FIG. 3) of the arm portion 5c. A rotating shaft portion 5a supported by a bearing portion (not shown) provided at the center is provided, and a bearing provided on the side wall of the shade 1 is provided on the other end side (lower end side in FIG. 3) of the arm portion 5c. A rotating shaft portion 5b that is inserted into the portion 1a and pivotally supports the shade 1 is provided. A screw-type lamp socket 12 is mounted in the rotating shaft portion 5b of the support arm 5, and the lamp 3 is connected to the lamp socket 12 by screwing the cap portion 3c of the lamp 3 into the lamp socket 12 from the side. The electrodes of the lamp socket 12 and the corresponding electrodes of the lamp 3 are electrically connected to each other. In addition, a power line (not shown) is wired in the support arm 5, and the output terminal 8b of the ballast 8 and the corresponding electrode of the lamp socket 12 are electrically connected via the power line. It has become so. Here, the case 7 and the support arm 5 constitute an attachment portion.

  Thus, in the lighting fixture A of the present embodiment, the shade 1 and the support arm 5 are rotatable around the rotation shaft portion 5a (in the direction of arrow D in FIG. 2), and the shade 1 is connected to the rotation shaft. It is freely rotatable around the portion 5b (in the direction of arrow E in FIG. 2).

  Next, the assembly procedure of the lighting fixture A will be described based on FIGS. In this description, it is assumed that the ballast 8 is stored in the case 7 in advance, and the ballast 8 and the lamp socket are connected by a power line.

  First, the reflecting mirror 2 is housed in the housing recess 1b of the shade 1 from the front side with the reflecting surface 2c facing the front side, and the fixing spring 6 is fitted into the fitting groove 1e of the shade 1 to reflect the reflecting mirror. Fix 2 to shade 1. Thereafter, the front frame 4 is fitted into the opening of the shade 1 from the front side, and the front frame 4 is rotated with respect to the shade 1 to fit the front frame 4 to the shade 1. Next, the lamp 3 is mounted on the lamp socket 12 provided in the rotary shaft portion 5b from the side, and then the rotary shaft portion 5a of the support arm 5 is pivotally supported on a bearing portion provided at the center of the lower surface of the case 7. When the rotary shaft portion 5b is pivotally supported on the bearing portion 1a of the shade 1, the assembly of the lighting fixture A is completed. At this time, the lamp 3 is arranged so that the lamp axis (the horizontal axis in FIG. 1A) is substantially parallel to the opening surface of the paraboloid forming the reflecting surface 2c of the reflecting mirror 2. The The lamp 3 emits light at the focal point of the paraboloid in a state where the shade 1 is rotated and arranged so that the symmetry axis Y of the parabola forming the paraboloid is substantially horizontal (that is, the state of FIG. 2). It arrange | positions so that the lower end part P of the pipe | tube 3a may be located (refer FIG.1 (b)).

  Here, the method to adjust the illumination direction of the lighting fixture A of this embodiment is demonstrated. First, when adjusting the illumination direction around the vertical axis, when the shade 1 and the support arm 5 are rotated around the rotation shaft portion 5a of the support arm 5 (in the direction of arrow D in FIG. 2), the direction of the shade 1 Changes and the illumination direction around the vertical axis is adjusted to the desired orientation. Further, when adjusting the illumination direction around the horizontal axis, when the shade 1 is rotated around the rotation shaft portion 5b of the support arm 5 (in the direction of arrow E in FIG. 2), reflection occurs as the shade 1 rotates. The direction of the mirror 2 changes, and the illumination direction around the horizontal axis is adjusted to a desired direction. Thus, in the lighting fixture A of the present embodiment, the lighting direction of the lamp 3 can be easily set to a desired direction by rotating the shade 1 and the support arm 5.

  In the luminaire A of the present embodiment, the arc tube at the focal point of the paraboloid forming the reflecting surface 2c in a state where the shade 1 is rotationally arranged so that the symmetry axis Y of the parabola forming the paraboloid is substantially horizontal. Since the lamp 3 is arranged so that the lower end portion P of 3a is located, the yellowish light emitted from the lower end portion P of the arc tube 3a is substantially horizontally directed by the reflecting surface 2c of the reflecting mirror 2. Since the light is reflected (arrow C in FIG. 1 (b)) and the yellow color is relieved by the light irradiated from the other part of the arc tube 3a and reflected in the oblique direction by the reflecting surface 2c, the arc tube The lighting device A can be provided in which the color of light emitted from 3a can be made substantially uniform, and thus color unevenness is reduced.

The lighting fixture of this embodiment is shown, (a) is a front view, (b) is XX sectional drawing. It is a perspective view same as the above. It is an exploded perspective view same as the above. (A)-(c) is explanatory drawing which shows the procedure which attaches the reflective mirror used for the same to a shade. The lighting fixture of a prior art example is shown, (a) is a front view, (b) is XX sectional drawing.

Explanation of symbols

1 SEED 2 Reflecting mirror 2c Reflecting surface 3 Lamp (metal halide lamp)
3a Arc tube 12 Lamp socket A Lighting fixture Y Axis of symmetry P Lower end

Claims (1)

  A reflecting mirror having a parabolic surface formed by rotating a parabola around the symmetry axis and a metal halide lamp are mounted, and the lamp axis of the metal halide lamp is substantially parallel to the opening surface of the parabolic surface. A lamp socket, a mounting portion that is mounted on the mounted portion, a shade that includes a reflecting mirror and a lamp socket, and that is rotatably supported by the mounting portion about the lamp shaft as a rotation center. And the lower end of the metal halide lamp is located at the focal point of the paraboloid forming the reflecting surface in a state where the shade is rotated and arranged so that the symmetry axis of the parabola forming the paraboloid is substantially horizontal. The metal halide lamp is arranged as described above.

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