JP2007311176A - Lighting fitting and lighting cover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a suitable light distribution by controlling inexpensively and simply nearly parallel light of a light source module, and to easily alter the light distribution well-adapted to a spacial design. <P>SOLUTION: A lighting fitting 10 for illuminating indoor and outdoor is equipped with the light source module 20 to irradiate nearly parallel light, and a translucent lighting cover 30a installed in the light irradiation direction of the light source module 20. On the rear side of the lighting cover 30a, Fresnel lenses 32a are regularly disposed which are formed based on nearly conical convexes 42 having outwards round convex parts 422 on the slope 421 and the foot of the conical convexes, thereby controlling the light distribution of the irradiated light by the lighting cover 30a. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a lighting fixture for indoor lighting or outdoor lighting, and relates to a lighting fixture and a lighting cover using a light source module that emits substantially parallel light.

  Conventionally, a light source module that emits parallel light is known. For example, Patent Document 1 includes a white LED, a rod, a direction changing member, and a reflector, and a plurality of white LEDs are provided in an annular shape with a predetermined interval from each other, and a white LED corresponding to each of the plurality of white LEDs is provided. A rod is provided so as to extend from the vicinity toward the focal point of the reflector, and the direction changing member of the focal position serving as a pseudo light source changes the traveling direction of the light of the white LED incident through the rod and emits it to the reflector. A light source module that irradiates parallel light from a reflector is disclosed.

JP 2005-250394 A

  By the way, when constructing a lighting fixture for indoor lighting or outdoor lighting using a light source module that emits parallel light, the parallel light can be controlled at low cost and easily to obtain an appropriate light distribution and adapted to spatial design. Therefore, it is required that the light distribution can be easily changed.

  The present invention has been proposed in view of the above problems, and in a lighting apparatus for indoor lighting or outdoor lighting using a light source module that irradiates substantially parallel light, the substantially parallel light of the light source module is controlled at low cost and easily. It is an object of the present invention to provide a lighting fixture and a lighting cover that can obtain an appropriate light distribution and can easily change the light distribution in accordance with a spatial design.

  The lighting fixture of the present invention is a lighting fixture for indoor / outdoor lighting comprising a light source module that emits substantially parallel light and a translucent lighting cover installed in the light irradiation direction of the light source module. A Fresnel lens portion formed based on a substantially chevron-shaped convex portion is regularly arranged on the back surface of the lens, and the light distribution of the irradiation light is controlled by the illumination cover.

  The illumination cover of the present invention is a translucent illumination cover installed in the light irradiation direction of a light source module that irradiates substantially parallel light of a lighting fixture for indoor / outdoor illumination, and is regularly arranged on the back surface. The light distribution of the light emitted from the light source module is controlled by a Fresnel lens portion formed on the basis of the substantially chevron-shaped convex portion.

  Moreover, in the lighting fixture and the lighting cover of the present invention, it is preferable that a Fresnel lens portion is formed on the Fresnel lens portion, the Fresnel portion being formed on the outer side of the skirt of the substantially chevron-shaped convex portion. In addition, the Fresnel lens portion corresponds to a substantially conical substantially chevron convex portion or is formed based on a substantially pyramid substantially chevron convex portion, or the Fresnel lens portion is arranged in a lattice shape, a staggered shape or a concentric shape. It is preferable to provide a configuration.

  In addition, the inclination angle of the Fresnel portion corresponding to the inclined portion (side surface) of the substantially chevron-shaped convex portion in one lighting cover is, for example, a large inclination angle of the Fresnel portion in the substantially central region. A configuration in which the angle of inclination of the Fresnel part is made different for each predetermined area of the surface of the lighting cover, such as reducing the angle of inclination of the Fresnel part in the vicinity of the left and right end parts or in the vicinity of the outer peripheral area of the circular cover, As the region moves along the surface of the lighting cover, such as gradually or stepwise increasing the inclination angle of the Fresnel part from the part toward the other end or from the center of the circular cover to the outer periphery, It is possible to adopt a configuration in which the inclination angle of the Fresnel portion is changed.

  In addition to the configuration of each invention and each embodiment, the invention of the present application is specified by changing these partial configurations to other configurations, or adding other configurations to these configurations. Or those obtained by deleting these partial configurations to the extent that partial effects can be obtained and specifying them as superordinate concepts.

  The lighting fixture or the lighting cover of the present invention is a light source module by controlling the light distribution of irradiation light by a Fresnel lens portion corresponding to a substantially mountain-shaped convex portion regularly arranged on the back surface of a translucent lighting cover. Therefore, it is possible to easily control the substantially parallel light emitted from the light source at low cost and to obtain an appropriate light distribution, and to easily change the light distribution according to the spatial design. In addition, since the light distribution can be controlled by the lighting cover, the light source modules can be shared and standardized. Furthermore, by forming the Fresnel lens portion corresponding to the substantially convex portion on the lighting cover, the lighting cover can be made thinner and lighter.

  In addition, by forming a Fresnel-shaped Fresnel part corresponding to the convex rounded part on the outer side of the skirt of the substantially chevron convex part on the Fresnel lens part, it corresponds to both the slope and the rounded part of the substantially chevron convex part. The illumination light can be diffused by the Fresnel part to obtain more uniform illumination light.

  Embodiments of a lighting fixture and a lighting cover according to the present invention will be described with reference to the drawings.

  The lighting fixture 10 of 1st Embodiment is installed in the light irradiation area | region of the light irradiation direction of the light irradiation direction of the light source module 20 and the light source module 20 which irradiates substantially parallel light, as shown in FIGS. And a translucent illumination cover 30a to be irradiated.

  The light source module 20 is provided in a light source 21 provided linearly along the direction perpendicular to the paper surface of FIG. 1, and provided in a substantially light irradiation region of the light source 21, and is provided along the direction perpendicular to the paper surface of FIG. The reflector 22 is housed in the housing 23. The power supply is supplied to the light source 21 by the wiring not shown in the figure, and the control board is switched on and off by the ON / OFF switch. The light source 21 connected to is turned on and off. The light source 21 is installed at the focal position of the reflector 22 on the paraboloid, and the irradiation light irradiated from the light source 21 upward in the figure is reflected by the reflector 22 and the reflected light is irradiated as the substantially parallel light downward in the figure. It has come to be. The two-dot chain line shown is an optical path.

  The illumination cover 30a has a substantially square shape in plan view formed of a light-transmitting material such as acrylic resin, and is detachably fixed to a predetermined position below the light source module 20 with a fixture not shown in the drawing. . The illumination cover 30a has Fresnel lens portions 32a formed on the back surface of a base 31a whose front surface is substantially flush, and the Fresnel lens portions 32a are regularly formed in a lattice shape (see FIG. 2). As shown in FIG. 3, the Fresnel lens portion 32 a has a shape corresponding to a substantially conical and substantially chevron-shaped convex portion 42 provided on the base 41 of the illumination cover 40 that is the basis of the illumination cover 30 a. It has a shape corresponding to an outwardly convex rounded portion 422 provided circumferentially on the inclined portion 421 that is the side surface of the convex portion 42 and the bottom of the convex portion 421, that is, the lower end of the inclined portion 421. It is composed of a circumferential Fresnel portion 321a corresponding to the slope of the inclined portion 421 and a circumferential Fresnel portion 322a corresponding to the curved surface of the round portion 422, which are obtained by concentrically cutting out at equal intervals.

  Here, the basic emission angle θ4 of the emitted light that the substantially parallel light from the light source 20 transmits through the illumination cover 40 that is the basis of the illumination cover 30a is expressed by Snell's law, that is, the refractive index n1 of air. (≈1) When the refractive index n2 of the material of the illumination cover 40 is assumed, n1 · sin θ1 = n2 · sin θ2, n2 · sin θ3 = n1 · sin θ4, and θ3 = θ1−θ2 hold for θ1 to θ4 in FIG. From the horizontal angle of the inclined portion 421 of the ridge 42 equal to the incident angle θ1 of the incident light to the inclined portion 421, and the refractive index n2 of the material of the illumination cover 40, and similarly, The emission angle of the light emitted from the illumination cover 30a is also mainly defined by the inclination angle θ1 of the slope of the Fresnel part 321a corresponding to the inclination part 421 and the refractive index n3 of the material of the illumination cover 30a. Therefore, the inclination angle θ1 of the inclined portion 321a of the Fresnel lens portion 32a is set according to the emission angle required for the emitted light of the illumination cover 30a and the material of the illumination cover 30a.

  Further, the pitch P forming the Fresnel lens part 32a of the illumination cover 30a, the diameter L of the outer end of the Fresnel part 322a corresponding to the rounded part 422 of the Fresnel lens part 32a, and the outermost Fresnel part 321a corresponding to the inclined part 421. The diameter l of the outer end, the radius of curvature of the Fresnel portion 322a, and the like can be appropriately set as necessary from the viewpoints of light diffusion, improvement in uniformity of illuminance distribution, and optimization. As an example, when the illumination cover 30a is formed of an acrylic resin having a refractive index n3 = about 1.4 to 1.5, the inclination angle θ1 of the Fresnel portion 321a is 30 ° to 60 °, and the pitch P is 2.0 to 6 The diameter L is set to 1.9 to 6.4 mm, the diameter l is set to 1.3 to 4.4 mm, and the radius of curvature of the Fresnel portion 322a is set to 1.8 to 7.0 mm.

  In the above configuration, the light source 21 can be an appropriate light source such as a light emitting diode (LED), a fluorescent lamp, an incandescent lamp, or a directional LED is used as the light source. In this case, the shape of the reflector 22 is adjusted accordingly so that the light source module 20 emits substantially parallel light. Further, the light source module 20 is appropriate as long as the illumination intensity necessary for indoor lighting or outdoor lighting is obtained and the light source module 20 has a structure that emits substantially parallel light. It is also possible to use a light source module that uses LEDs that provide the required illuminance, or a light source module that emits substantially parallel light from the back side of a Fresnel lens whose front surface is the Fresnel surface and whose back surface is flush. . In addition, one light source module 20 may be provided for one illumination cover 30a, but if there are a plurality of light source modules 20 such as two for one illumination cover 30a of the present embodiment, the illuminance distribution can be made more uniform. It is preferable. In addition, the inclination angle of the circumferential Fresnel part 321a corresponding to the slope of the inclined part 421 formed in a large number may be changed gradually or stepwise according to the required light distribution, and Fresnel parts 321b and 321c described later. The same applies to.

  The lighting fixture 10 of the first embodiment can obtain an appropriate light distribution by controlling substantially parallel light with the shape of the Fresnel lens portion 32a, in other words, the lighting cover 30a. Accordingly, it is possible to easily control the substantially parallel light emitted by the light source module 20 at a low cost and obtain an appropriate light distribution. Moreover, since the illumination cover 30a can be easily attached and detached and changed, the light distribution can be easily changed according to the space design. Further, since the light distribution can be controlled by the illumination cover 30a, the light source module 20 can be shared and standardized. Moreover, since the transmitted light of the illumination cover 30a can be diffused not only by the Fresnel part 321a corresponding to the inclined part 421 but also by the Fresnel part 322a corresponding to the rounded part 422, the illuminance distribution can be made more uniform. Furthermore, by forming the Fresnel lens portion 32a, the illumination cover 30a can be made thinner and lighter.

  Next, the illumination cover 30b of 2nd Embodiment is demonstrated as a modification of the illumination cover 30a of 1st Embodiment. The light source module of the lighting fixture in which the lighting cover 30b of the second embodiment is used and the arrangement and fixing structure of the lighting cover 30b with respect to the light source module are the same as those of the first embodiment, and only the lighting cover 30b is different. .

  The illumination cover 30b of the second embodiment is formed of a light-transmitting material such as acrylic resin, and as shown in FIG. 4, a Fresnel lens portion 32b is formed on the back surface of the base 31b whose front surface is substantially uniform. The lens portions 32b are regularly formed in a lattice shape. The Fresnel lens portion 32b has a shape corresponding to a substantially mountain-shaped convex portion obtained by making the substantially conical shape of the first embodiment into a substantially pyramid shape, more specifically, an inclined portion that is a side surface of the substantially pyramid-shaped convex portion, The bottom of the substantially pyramid-shaped convex part, that is, the shape corresponding to the outwardly projecting rounded part provided circumferentially at the lower end of the inclined part, and the pyramid-shaped convex part is cut out at equal intervals in a square circumferential shape The obtained rectangular peripheral Fresnel part 321b corresponding to the slope of the inclined part and the square peripheral Fresnel part 322b corresponding to the curved surface of the rounded part are obtained. The inclination angle of the Fresnel part 321b corresponding to the inclined part from the horizontal direction can be set in the same manner as in the first embodiment, and further corresponds to the pitch P forming the Fresnel lens part 32b and the rounded part. The width L between the front-view outer ends of the Fresnel part 322b, the width l between the front-view outer ends of the outermost peripheral Fresnel part 321b corresponding to the inclined part, the curvature radius of the Fresnel part 322b, and the like are the same as in the first embodiment. It is possible to set appropriately as needed. As an example, when the illumination cover 30b is formed of an acrylic resin having a refractive index n2 of about 1.4 to 1.5, the inclination angle θ1 of the slope of the Fresnel portion 321b is 30 ° to 60 ° and the pitch P is 2.0. To 6.5 mm, the width L to 1.9 to 6.4 mm, the width l to 1.3 to 4.4 mm, and the curvature radius of the Fresnel portion 322b to 1.8 to 7.0 mm. The second embodiment also has the same effect as the first embodiment.

  Next, the lighting fixture and lighting cover 30c of 3rd Embodiment are demonstrated.

  As shown in FIGS. 5 and 6, the lighting apparatus of the third embodiment is installed in a light source module 20 c that irradiates substantially parallel light and a light irradiation region in the light irradiation direction of the light source module 20 c, and is irradiated with substantially parallel light. And a translucent illumination cover 30c.

  As shown in FIG. 5, the light source module 20c includes a spot-like light source 21c and a reflector 22c that is provided in a substantially light irradiation region of the light source 21c and has a bowl-shaped paraboloid surface. Is. The light source 21c is installed at the focal position of the parabolic reflector 22c, and as shown by the two-dot chain line in the figure, the irradiation light irradiated from the light source 21c upward in the figure is reflected by the reflector 22c and reflected. Light is irradiated downward in the figure as substantially parallel light. Other configurations are the same as those of the light source module 20 of the first embodiment.

  The illumination cover 30c has a substantially circular shape made of a translucent material such as acrylic resin, and is disposed in the light irradiation direction in a one-to-one relationship with the light source module 20c. As shown in FIG. 6, a Fresnel lens portion 32 c having the same shape as that of the first embodiment is formed on the back surface of the base 31 c whose front surface is substantially flush, and 321 c is a Fresnel corresponding to the inclined portion 421. Reference numerals 322 c are Fresnel portions corresponding to the rounded portions 422. The Fresnel lens portion 32c is formed concentrically and regularly. The angle of inclination of the side surface of the Fresnel part 321c from the horizontal, the diameter L of the outer end of the Fresnel part 322c, the diameter l of the outer end of the outermost Fresnel part 321c, the radius of curvature of the Fresnel part 322c, and the location of the Fresnel lens part 32c As in the first embodiment, the pitch of concentric circles that define the angle can be appropriately set as necessary from the viewpoint of improving the diffusion of light, improving the uniformity of the illuminance distribution, and optimizing it. As an example, the pitch of the concentric circles can be set to 2.0 to 6.5 mm, and other numerical ranges can be set to the same numerical ranges as in the first embodiment. The arrangement and fixing structure of the other illumination cover 30c with respect to the light source module 20c are the same as those in the first embodiment. The third embodiment also has the same effect as the first embodiment. In addition, it is good also as an illumination cover which arrange | positions a Fresnel lens part zigzag.

  The present invention can be used as, for example, a lighting fixture for indoor lighting or a lighting cover thereof.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal front view illustrating a lighting apparatus and a lighting cover according to a first embodiment. The partial rear view of the illumination cover of 1st Embodiment. Explanatory drawing explaining the Fresnel lens part of the illumination cover of 1st Embodiment. (A) is the partial rear view of the lighting cover of 2nd Embodiment, (b) is the partial longitudinal cross-section front view of the lighting cover of 2nd Embodiment. The longitudinal front explanatory drawing which shows the lighting fixture and lighting cover of 3rd Embodiment. The partial rear view of the illumination cover of 3rd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Lighting fixture 20, 20c Light source module 21, 21c Light source 22, 22c Reflector 23, 23c Case 30a, 30b, 30c, 40 Lighting cover 31a, 31b, 31c, 41 Base | substrate 32a, 32b, 32c Fresnel lens part 321a, 322a, 321b, 322b, 321c, 322c Fresnel part 42 Convex part 421 Inclined part 422 Round part

Claims (5)

A lighting fixture for indoor / outdoor lighting comprising a light source module that irradiates substantially parallel light and a translucent lighting cover that is installed in the light irradiation direction of the light source module. A lighting apparatus comprising a regular arrangement of Fresnel lens portions formed on the basis of the portion and controlling the light distribution of the irradiation light with the illumination cover. A translucent illumination cover installed in the light irradiation direction of a light source module that emits substantially parallel light of a lighting fixture for indoor / outdoor lighting, based on substantially mountain-shaped projections regularly arranged on the back surface An illumination cover, wherein the light distribution of the light emitted from the light source module is controlled by the formed Fresnel lens portion. The illumination cover according to claim 2, wherein a Fresnel portion formed on the Fresnel lens portion is formed on the outer side of the bottom of the substantially mountain-shaped convex portion based on a convex rounded portion. 4. The illumination cover according to claim 2, wherein the Fresnel lens portion is formed based on a substantially cone-shaped convex portion corresponding to a substantially conical shape or a substantially pyramidal convex shape. The illumination cover according to claim 2, wherein the Fresnel lens portions are arranged in a lattice shape, a staggered shape, or a concentric shape.

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