JP5156544B2 - lighting equipment - Google Patents

Description

  The present invention relates to a luminaire including a reflecting mirror that reflects light from a light source, and more specifically to a downlight or the like that is used by being embedded in a ceiling or wall of a building.

  In recent years, in a lighting device such as a downlight, a spotlight, and a projector, a reflecting member having a high-brightness reflecting layer has been put into practical use in order to improve the device efficiency. A sectional configuration of such a reflecting member is shown in FIG. In the reflecting member 10, an undercoat layer 12 made of a coating film is formed on a base material 11 formed into a required shape, and a high-brightness light reflecting layer 13 is formed on the undercoat layer 12. A topcoat layer 14 is formed on the reflective layer 13 (see, for example, Patent Document 1). The substrate 11 is made of glass, plastic, metal, ceramic, or the like. The light reflecting layer 13 is made of silver, a silver alloy, aluminum, or the like, and is formed by a vacuum deposition method, a sputtering method, an ion plating method, or the like. The top coat layer 14 formed to protect the light reflecting layer 13 is made of a coating composition such as acrylic resin or silicon resin, and after being applied to the light reflecting layer 13, it is baked and dried at a high temperature for a certain time. It is formed by doing.

  By the way, although the lighting fixture provided with the above reflective members 10 is effective as a lighting fixture with high fixture efficiency, when it is used for a certain period in a living space, it is reflected by dust and dirt adhering to the reflective surface of the reflective member 10. Since the light reflection characteristic of the member 10 is lowered, the luminous flux emitted from the light source is reduced, and the instrument efficiency is lowered. Further, when the reflective surface is wiped and cleaned with a waste cloth in order to remove adhering matter such as dust and dirt, the surface of the coating composition used for the top coat layer 14 is insufficient. Will be scratched. In addition, when the light source of a lighting fixture at a high place such as a downlight is replaced, the reflecting surface is damaged by the lamp fitting being in contact with the reflecting surface. Thus, the reflecting member 10 with the scratched reflection surface has a problem of deteriorating the appearance of the lighting apparatus and generating glare.

Then, the resin film which improves the scratch resistance of the coated thing is known (for example, refer patent document 2 and patent document 3). The coated product on which the resin coating is applied can improve scratch resistance, chipping resistance, and solvent resistance of the coating and improve the appearance of the coating. However, when the coated object is the reflecting member 10 of the lighting fixture, the resin film coated on the reflecting surface of the reflecting member 10 is deteriorated and discolored because ultraviolet rays are loaded from the light source for a long period of time. Scratch resistance and chipping resistance are reduced by the alteration of the resin film, and the reflection efficiency of the reflecting member is lowered by the color change.
JP 2004-291492 A JP 2001-2744 A JP 2008-81606 A

  The present invention has been made in order to solve the above-described problems, and is intended to improve the scratch resistance on the reflection surface of the reflection member without impairing the light reflection characteristics, and to apply a resin coating due to the load of ultraviolet rays from the light source. An object of the present invention is to provide a lighting apparatus capable of preventing the quality change and color change.

In order to achieve the above object, the invention of claim 1 includes a light source, a reflecting surface that reflects light from the light source, and a reflecting member having an opening that emits light from the light source including reflected light from the reflecting surface. In the lighting fixture provided with, in a predetermined region of the reflecting surface of the reflecting member that approaches the light source from the edge of the opening, the reflecting member is subjected to chrome plating or silver plating, or the reflecting member material When aluminum is used, a resin film having a film thickness of 10 μm or more and 40 μm or less is formed directly on the reflecting member, and the resin film is formed by copolymerizing a soft segment and a hard segment . It is made of a translucent material that does not impair the light reflection characteristics, and has a scratch strength of 200 mN (meter / newton) or more.

According to a second aspect of the present invention, in the luminaire according to the first aspect, a portion where the ultraviolet intensity of the reflecting surface when the light source is turned on is 850 μW / cm ² or less is set as the predetermined region.

  According to the first aspect of the present invention, the reflection surface of the reflection member has improved scratch resistance without impairing the light reflection characteristics. Since the lighting fixture is not damaged during maintenance, the aesthetics of the lighting fixture are maintained and the occurrence of glare is suppressed.

  According to the invention of claim 2, since the resin coating does not cause deterioration such as alteration and discoloration due to the load of ultraviolet rays from the light source, the aesthetics of the lighting fixture is maintained and the scratch resistance is not reduced. .

  A lighting apparatus according to an embodiment of the present invention will be described with reference to FIGS. FIG.1 and FIG.2 shows schematic structure of the lighting fixture 1 of this embodiment. The luminaire 1 includes a light source 3 that is a downlight embedded in a ceiling 2 of a building, a reflection member 4 having a reflection surface 40 that reflects light from the light source 3, and a light source 3 that is formed integrally with the reflection member 4. The socket part 5 for mounting | wearing, and the top-plate part 6 extended in the upper part of the socket part 5 are provided. The light source 3 has a base part 31 that is screwed into the socket part 5. The reflecting member 4 has an opening that emits light from the light source 3 including reflected light. The edge 47 of the opening is provided with a frame 7 and a spring member 8, and the ceiling 2 is moved up and down by the frame 7 and the spring member 8 in a state where the reflecting member 4 is inserted into the hole 21 formed in the ceiling 2. When sandwiched, the luminaire 1 is fixed to the ceiling 2. The top plate 6 is provided with a ballast 9 for turning on the light source 3.

  As the light source 3, a straight tube type, a bulb type, a ring type or a compact type fluorescent lamp, an incandescent bulb, an electrodeless discharge lamp, a high intensity discharge lamp (HID), a low pressure discharge lamp, a cold cathode type fluorescent lamp, a light emitting diode (LED) etc. are mentioned, If it can be used for the lighting fixture 1, it will not specifically limit.

  The reflecting member 4 is formed in a substantially funnel shape so as to surround the periphery of the light source 3, and, of the reflecting surface 40 of the reflecting member 4, a predetermined region 41 (range indicated by a dotted line in the drawing) that approaches the light source 3 from the edge 47 of the opening. Thus, a coating layer 46 (see FIG. 3 described later), which is a resin coating, is formed in the coating region). The coating region 41 is a part where the base part 31 of the light source 3 is likely to come into contact with the reflecting surface 40 when the light source 3 is replaced, and is a part where dust or dirt is likely to adhere. Therefore, the coating layer 46 formed in the coating region 41 can effectively prevent the reflection surface 40 from being damaged.

In addition, the coating layer 46 is formed in a portion of the coating region 41 where the ultraviolet intensity from the light source 3 is 850 μW / cm ² or less, so that the coating layer 46 is altered and discolored by the load of ultraviolet rays from the light source 3. Therefore, the aesthetic appearance of the lighting fixture 1 is maintained and the scratch resistance is not lowered.

  FIG. 3 shows a cross-sectional configuration of the reflecting member 4 in the coating region 41. The reflecting member 4 includes a base material 42 formed into a predetermined shape based on a material such as resin, metal, or glass, an undercoat layer 43 formed on the inner surface of the base material 42, and the undercoat layer 43 A light reflection layer 44 formed on the light reflection layer 44, a top coat layer 45 formed on the light reflection layer 44, and a coating layer 46 formed on the top coat layer 45.

  The base material 42 is not particularly limited as long as it can be used under the heat-resistant temperature required for the lighting fixture 1. In order to improve the light reflection efficiency, the base material 42 may be subjected to a surface treatment such as a coating treatment, a plating treatment, or a vapor deposition treatment. Here, the case where resin is used for the base material 42 is demonstrated. The resin used for the substrate 42 may be either a thermoplastic resin or a thermosetting resin. Examples of the thermoplastic resin material used as the substrate 42 include polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polyphenylene oxide (PPO), thermoplastic polyimide (PI), polyetherimide ( PEI), polycarbonate (PC), liquid crystal polymer (LCP), syndiotactic polystyrene (SPS) and the like. Examples of the thermosetting resin material used as the base material 42 include unsaturated polyester (UP) that is generally used as a bulk molding compound (BMC) material. In order to improve the heat resistance, strength, light resistance, etc. of the base material 42, various additives such as an inorganic filler may be added to the above-mentioned thermoplastic resin material or thermosetting resin material. The thermoplastic resin material may be mixed by a polymer blend or may be block copolymerized by a compatibilizer. The molding method of the resin material is not particularly limited as long as it is a method generally used in resin molding. Examples of the molding method include injection molding, compression molding, vacuum molding, and pneumatic molding. Can be mentioned.

  Next, the case where a metal is used for the base material 42 will be described. Examples of the metal material used as the base 42 include an Al-based alloy, an Mg-based alloy, and an Fe-based alloy. The forming method of the metal material is selected in consideration of the characteristics of the material, the shape of the reflecting member 4, and the like, and examples of the forming method include spinning, pressing, die casting, and thixomolding.

  Next, the case where glass is used for the base material 42 will be described. Examples of the glass material used as the base material 42 include quartz glass. The method for forming the glass material is not particularly limited, and examples of the forming method include press working and blow working. In addition, when the base material 42 is molded based on the above-described resin material, metal material, glass material, or the like, and the surface of the base material 42 has deposits such as processing oil, release agent, or gas at the time of molding. The deposit is removed by a physical or chemical method.

  The undercoat layer 43 relieves internal stress generated between the base material 42 and the light reflection layer 44 and improves the adhesion between the base material 42 and the light reflection layer 44. The material for forming the undercoat layer 43 is not particularly limited as long as good adhesion to the base material 42 and the light reflecting layer 44 can be secured. For example, urethane resin, epoxy resin, acrylic resin, polyester Examples thereof include paints such as resin-based, epoxy-modified silicone resin-based, acrylic-modified silicone resin-based, and polybutadiene resin-based, and white-based paints containing a white pigment such as titanium oxide.

  Moreover, the formation method of the undercoat layer 43 is not particularly limited, and examples of the formation method include a spray method, a dipping method, and an electrostatic coating method. The film thickness of the undercoat layer 43 is not particularly limited as long as desired adhesion can be obtained. The undercoat layer 43 can be omitted when the base material 42 is smooth to the extent that there is no practical problem and sufficient adhesion between the base material 42 and the light reflecting layer 44 is ensured.

  The light reflecting layer 44 reflects light emitted from the light source 3 with high efficiency. The material for forming the light reflecting layer 44 is not particularly limited as long as it is a known material for forming the light reflecting layer 44 such as an Al material, an Ag material, or an alloy thereof. Among these, an Al material or an Al-based alloy, which is inexpensive as compared with the Ag material and has stable reflection characteristics and a property that hardly changes color at high temperatures, is preferable as the material of the light reflecting layer 44. Examples of the method for forming the light reflecting layer 44 include a vacuum deposition method, a sputtering method, an ion plating method, and an ion assist method. The film thickness of the light reflecting layer 44 is generally preferably 10 to 30 nm, but may be beyond this range as long as the desired strength and light reflectance can be obtained.

  The top coat layer 45 protects the light reflection layer 44. Examples of the material for forming the top coat layer 45 include an acrylic resin, a silicone resin, and an acrylic-modified silicone resin. However, the top coat layer 45 is not particularly limited as long as desired heat resistance and adhesion with the light reflecting layer 44 can be obtained. It is not something. Among these, a straight silicone-based inorganic paint that is not easily affected by heat and light from the light source 3 is preferable as the top coat layer 45. The film thickness of the topcoat layer 45 formed of a straight silicone-based inorganic paint is desirably 10 μm or less. In the case of the topcoat layer 45 formed in such a film thickness range, the base material 42 has a complicated three-dimensional shape, and a large temperature difference occurs in the base material 42 due to turning on / off of the light source 3. Even so, the occurrence of cracks in the topcoat layer 45 due to expansion / contraction of the reflecting member 4 can be suppressed.

  Further, the undercoat layer 43 and the topcoat layer 45 may be formed by being cured by irradiation with infrared rays, hot air, ultraviolet rays, electron beams or the like after being applied to the object. Further, the undercoat layer 43 and the topcoat layer 45 may be added with known additives such as a leveling agent, a coupling agent, an antifoaming agent, a matting agent, an ultraviolet absorber, and an antioxidant as necessary. Also good.

  The coating layer 46 is composed of a composition in which a soft segment having flexibility and a hard segment having hardness are copolymerized, and the scratch strength is 200 mN or more, and the film thickness is 10 μm or more and 40 μm or less. Examples of the soft segment include an acrylic urethane resin, a polycaprolactan resin, and a polyester polyol resin. In addition, examples of the hard segment include a resin having a Vickers hardness larger than that of the soft segment, such as a polysiloxane resin and an acrylic resin. In addition, examples of the copolymer of the soft segment and the hard segment include a copolymer of an acrylic urethane resin and a polydimethylsiloxane resin, and a copolymer in which polycaprolactan and polysiloxane are incorporated in a polydimethylsiloxane resin skeleton. Examples thereof include a polymer and a copolymer of polyester polyol resin and acrylic resin. The covering layer 46 improves the scratch resistance of the reflecting surface 40 without impairing the light reflection characteristics. Therefore, when the lighting fixture 1 is maintained such as wiping and cleaning dust and dirt adhering to the reflecting surface 40, and replacement of the light source 3, damage to the reflecting surface 40 can be prevented. Aesthetics are maintained and the occurrence of glare is suppressed.

  The coating layer 46 may contain components other than the above-described composition, and the above-described composition includes a known leveling agent, coupling agent, antifoaming agent, matting agent, ultraviolet absorber, antioxidant, and the like. What added the additive as needed may be used. Specific examples of the composition to be the coating layer 46 include, for example, an acrylic urethane-based soft paint and a polydimethylsiloxane copolymer, a polydimethylsiloxane copolymer, polycaprolactone, and a polysiloxane urethane or melamine. What consists of a crosslinked body and what consists of a compound of an acrylic resin and a polyester polyol are mentioned.

  Next, four examples embodying the above-described embodiment and five comparative examples for comparison will be described.

Example 1
An Al material (JIS standard: A1050) was processed into the shape of a predetermined reflecting member by spinning processing to obtain a base material 42, and then the base material 42 was degreased and cleaned with an alkaline cleaner. Next, a straight silicone resin (trade name: SH-804, manufactured by Toray Dow Corning Co., Ltd.) is spray-coated on the inner surface of the base material 42, and then baked and dried at 220 ° C. for 30 minutes to form an undercoat layer 43 having a film thickness of 15 μm. did. In addition, the film thickness of the coating film was measured using the eddy current type film thickness meter EDY-1000 made by Sanko Electronic Research Co., Ltd. And Ag (purity 99.99%) was vapor-deposited by the DC magnetron sputtering method on the surface of this undercoat layer 43, and the light reflection layer 44 with an average film thickness of 800? Was formed. Further, the same straight silicone resin as that of the undercoat layer 43 was spray-coated on the surface of the light reflecting layer 44 and baked and dried at 200 ° C. for 30 minutes to form a topcoat layer 45 having a film thickness of 15 μm.

  Finally, the composition described in the example of JP-A-2008-81606 is spray-applied on the surface of the topcoat layer 45 to the coating region 41 of the reflecting member 4 and then baked and dried at 120 ° C. for 30 minutes to form a film. A coating layer 46 having a thickness of 15 μm was formed.

(Comparative Example 1)
The reflective layer 4 was obtained by forming the undercoat layer 43, the light reflection layer 44, and the topcoat layer 45 on the same base material 42 as in Example 1.

(Comparative Example 2)
A reflective member 4 was obtained in the same manner as in Example 1 except that the coating layer 46 was formed in all parts of the reflective member 4 with a film thickness of 8 μm.

(Comparative Example 3)
A reflective member 4 was obtained in the same manner as in Example 1 except that the coating layer 46 was formed with a film thickness of 45 μm.

About the sample produced as mentioned above, the evaluation test was implemented about scratch strength, scratch resistance, a total light reflectivity, and an instrument efficiency. These test methods are described below. In the evaluation test of scratch strength, a vertical load 0-100 g or 0 on a scratching needle (diamond 0.5 mmR90 °) using a continuous load type scratch strength tester Tribogear TYPE 18 manufactured by Shinto Kagaku Co., Ltd. A continuous load (moving distance: 100 mm) of ˜200 g was applied, and the load resistance of the reflecting surface 40 (the amount of load that can be withstood without scratching the coating film) was measured at a scratching speed of 600 mm / min. In the evaluation test for scratch resistance, the reflective surface 40 was rubbed 100 times with a load of 1 kgf / cm ² using a JIS standard cotton cloth, and the degree of scratches on the reflective surface 40 after rubbing was visually evaluated. In the evaluation test of the total light reflectance, a value at 555 nm was measured using a self-recording spectrophotometer U-4000 manufactured by Hitachi High-Technology Corporation. In the evaluation test of the instrument efficiency, when the light source 3 is mounted on the socket part 5 and turned on using a predetermined light distribution measuring device, the light beam emitted outside the instrument and the light source 3 are turned on alone The total luminous flux radiated to was measured and the ratio of these was obtained. Next, Table 1 shows the results of the above-described evaluation tests for Example 1 and Comparative Examples 1 to 3, the film thickness of the coating layer 46 described above, and the coating site of the coating layer 46.

  In the results of the scratch resistance evaluation test, “◯” indicates that no scratches or the like are observed on the reflective surface 40 by visual evaluation, and “×” indicates that the reflective surface 40 is scratched by visual evaluation. It shows that it is recognized. As can be seen from Table 1, only the lighting fixture 1 provided with the reflection member 4 of Example 1 has scratch resistance, and has high total light reflectance and fixture efficiency.

(Example 2)
Reflecting member 4 obtained in the same manner as in Example 1, Matsushita Electric Works, Ltd., metal halide lamp (Cerameta Premier SPD) MT150C-LW-SPD was lit in a thermostat set at 90 ° C., The distance between the light source 3 and the reflecting member 4 was adjusted to set the ultraviolet intensity of the reflecting surface 40 to 200 μW / cm ^2, and left for 168 hours to conduct a light resistance test. The ultraviolet intensity was obtained by measuring using an instantaneous multi-measurement system MCPD-3000 manufactured by Otsuka Electronics Co., Ltd. and calculating an integral value of 250 to 400 mm.

(Example 3)
A light resistance test was performed in the same manner as in Example 2 except that the ultraviolet intensity of the reflecting surface 40 was set to 500 μW / cm ² .

Example 4
A light resistance test was performed in the same manner as in Example 2 except that the ultraviolet intensity of the reflecting surface 40 was set to 800 μW / cm ² .

(Comparative Example 4)
A light resistance test was conducted in the same manner as in Example 2 except that the ultraviolet intensity of the reflecting surface 40 was set to 870 μW / cm ² .

  About the sample produced as mentioned above, the evaluation test which concerns on scratch strength and a scratch resistance was implemented by the same method as the above. Table 2 shows the results of the above evaluation tests on Examples 2 to 4 and Comparative Example 2, the film thickness of the coating layer 46 described above, and the ultraviolet intensity.

  As can be seen from Table 2, the luminaire 1 provided with the reflecting members 4 of Examples 2 to 4 has scratch resistance even after undergoing a light resistance test, but Comparative Example 4 has scratch resistance. I don't have it.

  In addition, this invention is not restricted to the structure of said embodiment, A various deformation | transformation is possible in the range which does not change the summary of invention. For example, if the base material itself has a desired reflectance, it is not necessary to form an undercoat layer, a light reflection layer, and a topcoat layer on the surface of the base material. Further, instead of forming the undercoat layer, the light reflection layer, and the topcoat layer on the surface of the base material, a plating treatment with chromium, silver, or the like may be performed.

The perspective view which shows the lighting fixture which concerns on one Embodiment of this invention. Side surface sectional drawing of the instrument. Sectional drawing which shows the structure of the reflection member in the film area | region of the instrument. Sectional drawing which shows the structure of the reflection member in the conventional lighting fixture.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lighting fixture 3 Light source 4 Reflective member 40 Reflective surface 41 Coating area | region (The predetermined area | region which approaches a light source from the edge of an opening among the reflective surfaces of a reflective member)
46 Coating layer (resin coating)
47 Opening edge

Claims (2)

In a lighting fixture comprising: a light source; and a reflecting member that reflects light from the light source and a reflecting member having an opening that emits light from the light source including light reflected from the reflecting surface .
In a predetermined area of the reflecting surface of the reflecting member that approaches the light source from the edge of the opening, after the reflecting member is subjected to chrome plating or silver plating, or when aluminum is used as the material of the reflecting member A resin film having a thickness of 10 μm or more and 40 μm or less is formed directly on the reflecting member ,
The resin film is made of a translucent material in which a soft segment and a hard segment are copolymerized and does not impair the light reflection characteristics of the reflecting member ,
A luminaire having a scratch strength of 200 mN (Meter Newton) or more. ^2. The lighting apparatus according to claim 1, wherein a portion where the ultraviolet intensity of the reflecting surface when the light source is turned on is 850 μW / cm ² or less is set as the predetermined region.

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