JP6311856B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting fixture, and more particularly, to a lighting fixture that uses a light emitting element such as a light emitting diode (LED) as a light source.

  Since the semiconductor light source has high efficiency and long life, it is expected as an alternative light source for incandescent bulbs which are light sources of conventionally known lighting fixtures. In particular, product development of lighting fixtures using LEDs as a light source is being actively promoted.

  As a light source module constituting this type of lighting fixture, for example, Patent Document 1 discloses a light source module using an LED as a light source.

  The conventional light source module disclosed in Patent Document 1 includes an LED light source (semiconductor light source), a reflection frame body that surrounds the LED light source with a reflection surface that extends in the light emission direction, and a light transmission that covers the light emission direction of the reflection frame body. A light condensing member. The reflection frame is configured to reflect light from the LED light source on the inner peripheral surface, guide the light to the light collecting member, and support the light collecting member by contacting the light collecting member.

JP 2011-54829 A

  In the conventional lighting fixture, the light collecting member has a flange that comes into contact with the reflection frame body in order to be supported by the reflection frame body. Such a flange is provided over the circumferential direction so as to protrude in the radial direction of the light collecting member, for example.

  However, the configuration provided with such a flange has a problem that light distribution cannot be controlled efficiently.

  The present invention has been made to solve such a problem, and an object thereof is to provide a lighting apparatus capable of efficiently controlling light distribution.

  In order to achieve the above object, one aspect of a lighting fixture according to the present invention includes a light source, a cylindrical reflection member having an opening at an end, and an inner surface reflecting light from the light source, and the opening. An optical member fixed by the reflecting member so as to close the optical member, the optical member having a convex portion for controlling the light distribution of the light, the convex portion protruding toward the light source, It is arranged at the periphery.

  The convex portion has a refracting surface that refracts incident light and a reflecting surface that reflects light refracted by the refracting surface, and the reflecting surface and the inner surface of the reflecting member are in contact with each other. Good.

  The optical member may include a plurality of convex portions including the convex portions, and the plurality of convex portions may be arranged in a concentric ring shape.

  Moreover, the said reflection member may have the latching claw which protrudes from the opening edge of the said edge part, and fixes by latching the said optical member.

  The optical member may have a recess formed on a side surface of the optical member and into which at least the tip of the locking claw is inserted.

  In addition, the locking claw has a connection portion that connects the tip portion and the opening edge, the tip portion is provided to be bent with respect to the connection portion, and the optical member further includes A groove portion that communicates with the concave portion, extends from the concave portion to the light incident side of the optical member, and into which the connecting portion is inserted, and the bottom surface of the concave portion is formed deeper than the bottom surface of the groove portion. Also good.

  Further, the optical member may be provided with a wrinkle in a region in a circumferential direction including a region overlapping the locking claw when viewed from the light emitting side, on the light emitting side surface.

  According to the present invention, light distribution can be controlled efficiently.

FIG. 1 is a perspective view of a lighting apparatus according to an embodiment. FIG. 2 is an exploded perspective view of the lighting fixture according to the embodiment. FIG. 3 is a view for explaining an optical member and a reflecting member in the lighting fixture according to the embodiment, (a) is a perspective view of the reflecting member that fixes the optical member and the optical member, and (b). (A) is the partially expanded sectional view cut | disconnected by the A surface of (a), (c) is the partially expanded sectional view cut | disconnected by the B surface of (a). 4A and 4B are diagrams for explaining the optical member and the reflecting member in the lighting fixture according to the embodiment. FIG. 4A is a perspective view of the optical member and the reflecting member that fixes the optical member, and FIG. (A) is the perspective view which expanded the X section, (c) is a perspective view of only the optical member shown in (b). 5A and 5B are diagrams for explaining the optical member and the reflecting member in the lighting fixture of the comparative example. FIG. 5A is a perspective view of the optical member and the reflecting member that fixes the optical member, and FIG. It is the partially expanded sectional view cut | disconnected by A 'surface of a), (c) is the partially expanded sectional view cut | disconnected by B' surface of (a). FIG. 6A is a cross-sectional view of a lighting fixture in a comparative example for describing an example of an effect of the lighting fixture according to the embodiment. FIG. 6B is a cross-sectional view of the lighting fixture for explaining an example of the effect of the lighting fixture according to the embodiment. FIG. 7 is a diagram for explaining the optical member and the reflecting member in the lighting fixture in the comparative example, (a) is a perspective view of the optical member and the reflecting member that fixes the optical member, and (b) is ( It is the perspective view which expanded the X 'part of a). FIG. 8A is a partial plan view of the lighting fixture in the comparative example for describing an example of the effect of the lighting fixture according to the embodiment. FIG. 8B is a partial plan view of the lighting fixture for explaining another example of the effect of the lighting fixture according to the embodiment. FIG. 9 is a partial plan view of a lighting fixture according to a modification of the embodiment.

  Hereinafter, a lighting apparatus according to an embodiment of the present invention will be described with reference to the drawings. Note that each of the embodiments described below shows a preferred specific example of the present invention. Therefore, the numerical values, shapes, materials, components, arrangement positions and connection forms of the components shown in the following embodiments are merely examples, and are not intended to limit the present invention. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims showing the highest concept of the present invention are described as optional constituent elements. Each figure is a schematic diagram and is not necessarily illustrated exactly. Therefore, there is a portion that does not exactly match in each figure.

(Embodiment)
First, the structure of the lighting fixture which concerns on embodiment of this invention is demonstrated using FIG.1 and FIG.2. FIG. 1 is a perspective view of a lighting fixture according to the embodiment, and FIG. 2 is an exploded perspective view of the lighting fixture according to the embodiment.

  The lighting fixture 1 shown in FIGS. 1 and 2 is used as a lighting fixture such as a spotlight or a downlight that illuminates light downward.

  As shown in FIG. 1, the lighting fixture 1 according to the present embodiment is surrounded by a lens member 10 and a housing 40, and as shown in FIG. 2, the lens member 10, the light source unit 30, and the reflection A member 20 and a housing 40 are provided. As illustrated in FIG. 2, the lighting fixture 1 is configured by combining a housing 40, a light source unit 30, a reflecting member 20, and a lens member 10 in this order.

  Hereinafter, each component in the lighting fixture 1 is demonstrated in detail.

[Light source]
The light source unit 30 includes an LED light source 31 and lead wires 32 a and 32 b, and emits predetermined light by electric power supplied from a power supply unit (not shown) outside the lighting fixture 1.

  The LED light source 31 is an embodiment of a light source, and is a light emitting module having a light emitting element, and emits predetermined light radially. The LED light source 31 is configured to emit white light, and includes a substrate 31a, a plurality of LEDs (bare chips) 31b mounted on the substrate 31a, and a sealing member 31c that seals the LEDs 31b. In the present embodiment, the optical axis of the LED light source 31 is the Z-axis direction (vertical direction).

  The substrate 31a is a mounting substrate for mounting the LED 31b, and is, for example, a resin substrate, a ceramic substrate, an insulating-coated metal base substrate, or the like. Moreover, as the board | substrate 31a, the plate-shaped board | substrate which has a plane whose planar view is a rectangular shape can be used, for example. The substrate 31a is attached to the fixing member of the housing 40 by screws, for example. Thereby, the heat which LED31b emits is conducted to case 40 via substrate 31a. In order to efficiently conduct the heat generated by the LED 31b to the housing 40, the substrate 31a may be a substrate or a metal base substrate in which a metal material is formed on the surface (for example, the back surface) to be in close contact with the internal fixing member. It is preferable to use it. Although not shown, the substrate 31a is formed with a pair of electrode terminals (positive electrode terminal and negative electrode terminal) for receiving DC power for causing the LED 31b to emit light from the outside via the lead wires 32a and 32b. ing.

  The LED 31b is an embodiment of a light emitting element, and is a bare chip that emits monochromatic visible light. The LED 31b in the present embodiment is a blue light emitting LED chip that emits blue light when energized. A plurality of LEDs 31b are arranged in a matrix on one surface (front surface: upper surface in FIG. 2) of the substrate 31a. The LEDs 31b are electrically connected to each other by metal wiring (not shown) or wires (not shown) patterned on the substrate 31a.

  The sealing member 31c is formed so as to collectively seal the plurality of LEDs 31b on the substrate 31a. The sealing member 31c includes a phosphor that is a light wavelength conversion material, and functions as a wavelength conversion layer that converts the wavelength of light from the LED 31b. As the sealing member 31c, for example, a phosphor-containing resin in which predetermined phosphor particles and a light diffusing material are dispersed in a silicone resin can be used.

  As the phosphor particles, when the LED 31b is a blue light emitting diode that emits blue light, for example, YAG-based yellow phosphor particles can be used to obtain white light. Thereby, a part of blue light emitted from the LED 31b is wavelength-converted into yellow light by the yellow phosphor particles contained in the sealing member 31c. That is, the yellow phosphor particles are excited by the blue light (excitation light) emitted from the LED 31b, and fluoresce yellow light having a complementary color relationship with the blue light. The blue light that has not been absorbed by the yellow phosphor particles and the yellow light that has been wavelength-converted by the yellow phosphor particles are diffused and mixed in the sealing member 31c, so that the white light is emitted from the sealing member 31c. And emitted. As the light diffusing material, particles such as silica are used.

  In addition, in order to improve color rendering properties, red fluorescent particles may be mixed in the sealing member 31c in addition to the yellow phosphor particles. Further, the sealing member 31c is not necessarily formed of a silicone resin, and may be formed of an inorganic material such as a low-melting glass or a sol-gel glass in addition to an organic material such as a fluorine-based resin. Further, the sealing member 31c may collectively seal all the LEDs 31b, or may seal linearly for each row of the LEDs 31b.

[Case]
The housing 40 is a housing that forms an outline of the luminaire 1 and is a mounting base to which the light source unit 30 is attached. The housing 40 is a heat sink that dissipates heat generated by the LED light source 31 of the light source unit 30. The casing 40 is formed using a metal material, and is made of aluminum die casting in the present embodiment.

  The housing 40 houses the light source unit 30 therein, and has a main body part 41 formed in a substantially cylindrical shape with a bottom, and a plurality of radiating fins protruding downward (Z-axis minus direction) from the bottom surface of the main body part 41. 42. The main body 41 has a bottom surface that is a fixing member for mounting the light source unit 30, and the inner surface (the surface on the Z-axis plus side) of the bottom surface and the back surface of the substrate 31 a abut. A plurality of heat radiation fins 42 are provided on the outer surface of the bottom surface (the surface on the negative side of the Z axis). Thereby, the housing | casing 40 can thermally radiate the heat | fever which generate | occur | produces with the LED light source 31 efficiently.

[Reflection member]
Next, the reflecting member 20 will be described. The reflecting member 20 is a reflecting plate having a reflecting function, and is an incident port that is an opening through which light from the LED light source 31 is incident, and an emitting port that is an opening through which light incident from the incident port is emitted from the reflecting member 20. And have. The reflecting member 20 has an annular frame shape (funnel shape) having an inner diameter that gradually increases from the entrance to the exit. For example, polybutylene terephthalate (PBT) or polycarbonate (PC) is used. The hard white resin material can be used. A reflective member using PBT or PC has heat resistance and high reflectance, and further, a flame retardant grade can be selected.

  The reflecting member 20 has a locking claw 21 and is fixed by locking the lens member 10 provided so as to close the emission port by the locking claw 21. Details of the locking claw 21 will be described later.

  The inner peripheral surface of the reflecting member 20 is a reflecting surface that reflects light from the LED light source 31. The reflection surface is configured to reflect light incident from the incident port and emit the light from the output port.

  For example, a leg portion (not shown) that protrudes downward (Z-axis minus direction) is provided on the outer peripheral surface of the reflection member 20, and the reflection member 20 and the housing 40 have a leg portion that is a main body portion of the housing 40. 41 is fixed by screwing.

  The reflecting member 20 may be formed of a metal material such as aluminum instead of a hard white resin material. Or you may form the metal vapor deposition film (metal reflective film) which consists of metal materials, such as silver and aluminum, as a reflective surface on the inner surface of the reflection member 20 made of resin.

[Lens material]
Next, the lens member 10 will be described. The lens member 10 is an aspect of an optical member, is disposed at a position facing the LED light source 31, and has a light incident surface and a light output surface. The lens member 10 emits the light incident on the light incident surface from the LED light source 31 from the light emitting surface.

  The lens member 10 in the present embodiment is fixed by the reflecting member 20 so as to block the emission port of the reflecting member 20. The lens member 10 is configured such that the light from the LED light source 31 incident from the light incident surface which is one surface in the thickness direction of the lens member 10 (the lower surface in FIG. 2) is opposed to the one surface. The light is emitted from a light emission surface which is the surface (upper surface in FIG. 2). The lens member 10 is formed on a side surface and has a concave portion 11 into which at least the distal end portion of the locking claw 21 of the reflecting member 20 is inserted.

  The lens member 10 is formed using a translucent material. For example, the lens member 10 can be formed using a transparent resin material such as PMMA (acrylic) or polycarbonate, or a transparent material having insulation properties such as a glass material. .

  Here, the structure of the lens member 10 will be described in detail with reference to FIGS. 3 and 4.

  FIG. 3 is a diagram for explaining the lens member 10 and the reflecting member 20 in the lighting fixture 1 according to the embodiment. FIG. 3A is a perspective view of the lens member 10 and the reflecting member 20 that fixes the lens member 10. (B) is a partially enlarged sectional view cut along the A plane of (a), and (c) is a partially enlarged sectional view cut along the B plane of (a). That is, (b) in the figure is a cross-sectional view at a position other than the position where the concave portion 11 of the lens member 10 is formed, and (c) in the same figure is a cross-sectional view at the position where the concave portion 11 of the lens member 10 is formed. It is. FIG. 4 is a diagram for explaining the lens member 10 and the reflecting member 20 in the lighting fixture 1 according to the embodiment. FIG. 4A is a perspective view of the lens member 10 and the reflecting member 20 that fixes the lens member 10. (B) is the perspective view which expanded the X section of (a), (c) is a perspective view of only lens member 10 shown in (b).

  As shown in FIG. 3, the lens member 10 is fixed by the reflecting member 20 so as to block the emission port of the reflecting member 20. The lens member 10 is arranged concentrically and includes a plurality of convex portions 12 that control the light distribution from the LED light source 31. For example, the plurality of convex portions 12 are arranged concentrically around the optical axis of the LED light source 31. For example, the cross-sectional shape of each convex part 12 becomes small as it approaches the LED light source 31.

  The plurality of convex portions 12 are provided so as to protrude from the plate-like base portion 13 of the lens member 10 to the LED light source 31 side. Each convex part 12 refracts the light emitted from the LED light source 31 and reflects the light refracted by the refractive surface 12b, so that the light is emitted from the light emitting surface of the lens member 10 in a desired direction. It is formed by the reflecting surface 12a to be emitted. Thereby, each convex part 12 can control the light distribution of the light emitted from the LED light source 31.

  In other words, each convex portion 12 includes a refraction region 52 that refracts light emitted from the LED light source 31 and a reflection region 51 that reflects light that is refracted by the refraction region 52 and enters the lens member 10. . That is, the lens member 10 includes the refractive region 52 and the reflective region 51 repeatedly in this order in a concentric ring shape.

  Next, the convex part 12A arranged on the outermost side among the plurality of convex parts 12 will be described.

  The convex portion 12A is disposed on the periphery of the optical member 10 and protrudes toward the LED light source 31 side. In other words, the convex portion 12 </ b> A is arranged so that the reflecting surface 12 a of the convex portion 12 </ b> A and the side surface 13 a of the base portion 13 are connected to the base portion 13. That is, the reflecting surface 12a of the convex portion 12A and the side surface 13a of the base portion 13 are in contact with each other without using, for example, a flange portion or the like. That is, when the lens member 10 is viewed from the light incident side, the base portion 13 is not visually recognized at the periphery of the lens member 10.

  Specifically, when the lens member 10 is viewed from the light incident side, the reflection surface 12a of the convex portion 12A is visually recognized at the periphery of the lens member 10. This is because the reflection surface 12 a of the convex portion 12 </ b> A is inclined with respect to the optical axis of the lens member 10. Specifically, the reflection surface 12a is inclined so as to approach the optical axis of the lens member 10 toward the light incident side. For example, in a cross section cut along a plane including the optical axis of the lens member 10, the angle formed by the reflecting surface 12a of the convex portion 12A with the optical axis is different from the angle formed by the side surface 13a of the base 13 with the optical axis.

  As described above, the lens member 10 has the convex portion 12A arranged at the periphery, so that the lens member 10 can emit light in a desired direction from the periphery. It can be. Therefore, light distribution can be controlled efficiently. In the present embodiment, the desired direction is, for example, the vertical direction (Z-axis plus direction).

  Further, as shown in FIGS. 3B and 3C, the reflective surface 12 a of the outermost convex portion 12 </ b> A and the inner surface of the reflective member 20 are in contact with each other. For example, the reflection surface 12a of the outermost convex portion 12A among the plurality of convex portions 12 and the inner surface of the reflective member 20 are in contact with each other around the entire circumference of the exit port of the reflective member 20.

  Thereby, light distribution can be controlled more efficiently. Specifically, the light reflected by the inner surface of the reflecting member 20 and incident on the reflecting surface 12a of the convex portion 12A is emitted in a direction different from the desired emitting direction of the lens member 10. On the other hand, the space (gap) between the lens member 10 and the reflecting member 20 can be suppressed when the reflecting surface 12a of the convex portion 12A and the inner surface of the reflecting member 20 come into contact with each other. Therefore, since the light reflected by the inner surface of the reflecting member 20 and entering the reflecting surface 12a of the convex portion 12A can be suppressed, the light emitted in a direction other than the desired emitting direction can be suppressed. In other words, since the light irradiated outside the desired irradiation range of the luminaire 1 can be suppressed, it is possible to suppress the decrease in the luminous flux in the desired irradiation range.

  Moreover, since the space (gap) between the lens member 10 and the reflecting member 20 can be suppressed, light leaking from the space to the outside of the lighting fixture 1 can be suppressed. Therefore, optical loss can be suppressed.

  Next, the recess 11 formed on the side surface of the lens member 10 will be described while also describing the locking claw 21 of the reflecting member 20. As shown in FIGS. 3C and 4, in a state where the lens member 10 and the reflection member 20 are assembled, at least the tip end portion 21 a of the locking claw 21 of the reflection member 20 is inserted into the recess 11. The

  First, the structure of the locking claw 21 of the reflecting member 20 will be described.

  As shown in FIG. 3C, the locking claw 21 includes a tip 21 a and a connection 21 b that connects the tip 21 a and the edge (opening edge) of the exit of the reflecting member 20. The distal end portion 21a is bent with respect to the connection portion 21b. A plurality of such locking claws 21 are provided at different positions in the circumferential direction of the opening edge of the reflecting member 20. In the present embodiment, two locking claws 21 are provided at positions facing the opening edge.

  This locking claw 21 has flexibility, for example. As a result, when the lens member 10 is fitted and assembled from above the reflecting member 20 (Z-axis plus direction), the locking claw 21 bends and expands in the radial direction of the exit port of the reflecting member 20, thereby assembling a tool. The lens member 10 and the reflecting member 20 can be easily assembled without using the.

  Here, at least a part of the upper surface (the surface on the Z-axis plus side) of the distal end portion 21a may be formed in a taber shape that becomes lower toward the center of the emission port of the reflection member 20. Accordingly, when the lens member 10 and the reflection member 20 are assembled, the locking claw 21 is easily spread in the radial direction of the emission port of the reflection member 20 by pressing the lens member 10 downward. Therefore, the assembly is further facilitated.

  Next, the structure of the recess 11 formed in the lens member 10 will be described.

  As shown in FIG. 4C, the recess 11 communicates with the recess 11a formed on the side surface of the lens member 10 and the recess 11a, and extends from the recess 11a to the light incident surface of the lens member 10. Groove portion 11b. The leading end 21a of the locking claw 21 is inserted into the recess 11a, and the connecting portion 21b of the locking claw 21 is inserted into the groove 11b.

  Thereby, when the luminaire 1 is viewed from the light emitting side of the lens member 10, the distal end portion 21 a and the connection portion 21 b of the locking claw 21 become difficult to see, and deterioration in appearance quality (appearance noise) is suppressed. it can.

  The recess 11 does not include the groove 11b and may be only the recess 11a into which the distal end 21a of the locking claw 21 is inserted. However, by forming the groove 11b as in the present embodiment, illumination is achieved. When the instrument 1 is viewed from the light emitting side of the lens member 10, not only the tip 21a but also the connecting part 21b becomes difficult to see, and the deterioration of the appearance quality can be further suppressed.

  Here, the bottom surface of the recess 11a is formed deeper than the bottom surface of the groove 11b. That is, the depth from the side surface 13a of the base portion 13 of the lens member 10 to the bottom surface of the recess 11a is larger than the depth from the side surface 13a to the bottom surface of the groove portion 11b.

  Thereby, after the lens member 10 and the reflection member 20 are assembled, the lens member 10 can be prevented from dropping from the reflection member 20. Specifically, when the upward biasing force (Z-axis plus direction) is applied to the lens member 10 after the lens member 10 and the reflecting member 20 are assembled, the tip 21a of the locking claw 21 is By coming into contact with the wall formed at the boundary between the recess 11a and the groove 11b, it is possible to suppress the lens member 10 from falling off the reflecting member 20.

[Comparison with comparative example]
Hereinafter, the effect which the lighting fixture 1 which concerns on this Embodiment which has such a structure show | plays is explained in full detail, contrasting with a comparative example.

<1. Light distribution control>
First, light distribution control of the lighting fixture 1 according to the present embodiment will be described while comparing with the lighting fixture of the comparative example.

  5A and 5B are diagrams for explaining the lens member and the reflecting member in the lighting fixture of the comparative example. FIG. 5A is a perspective view of the lens member and the reflecting member that fixes the lens member, and FIG. It is the partially expanded sectional view cut | disconnected by A 'surface of a), (c) is the partially expanded sectional view cut | disconnected by B' surface of (a).

  As shown in FIG. 5, the lens member 910 and the reflecting member 920 in the lighting fixture of the comparative example are substantially the same as the lens member 10 and the reflecting member 20 in the lighting fixture 1 of the present embodiment. Therefore, hereinafter, the structure of the lens member 910 and the reflection member 920 in the comparative example will be described focusing on differences from the lens member 10 and the reflection member 20 in the present embodiment.

  As shown in FIG. 5, the lens member 910 in the comparative example has a convex portion 912 that is repeatedly formed concentrically. However, as compared with the lens member 10, the lens member 910 has a flat flange portion 910a that protrudes in the radial direction of the lens member 910 from the convex portion 912A having the outermost diameter and is provided in the circumferential direction. Different. That is, in the lens member 910, when the lens member 910 is viewed from the light incident side, the flange portion 910a is visually recognized at the periphery of the lens member 910. That is, the lens member 910 does not have the convex portion 912 at the periphery of the light incident surface. In other words, it is a reflective surface 912a for controlling the light distribution of the light emitted from the LED light source 31, and is a reflective surface 912a for reflecting the light incident into the lens member 910 out of the light emitted from the LED light source 31. Does not have.

  Thereby, the lens member 910 in the comparative example emits light in a desired direction from the flange portion 910a that is an end portion in a direction perpendicular to the optical axis on a plane including the optical axis of the lens member 910. There is a problem that can not be. That is, the lens member 910 cannot make the region where the flange portion 910a is provided a light distribution control region which is a region where light can be emitted in a desired direction. In other words, the light distribution cannot be controlled efficiently.

  Hereinafter, the light distribution characteristics in the comparative example and the light distribution characteristics in the present embodiment will be described with reference to FIGS. 6A and 6B. FIG. 6A is a cross-sectional view of a lighting fixture in a comparative example for describing an example of an effect of the lighting fixture according to the embodiment. FIG. 6B is a cross-sectional view of the lighting fixture for explaining an example of the effect of the lighting fixture according to the embodiment. 6A and 6B indicate an example of an optical path of light emitted from the LED light source 31.

  As shown in FIG. 6A, in the lens member 910 in the comparative example, the light L9 emitted from the LED light source 31 is refracted by the refracting surface 912b of each convex portion 912 and enters the lens member 910. The light L9 is reflected by the reflecting surface 912a of the convex portion 912 and is emitted from the light emitting surface of the lens member 910 in a desired direction.

  Here, of the light L9 emitted from the LED light source 31, the light LA9 directed to the emission port edge of the reflection member 920 is reflected by the inner surface of the reflection member 920 without passing through the convex portion 912, and is emitted from the lens member 910. It will be emitted from the surface. Such light LA9 is emitted in a direction different from a desired direction (vertical direction in this comparative example). Further, among the light L9 emitted from the LED light source 31, the light (not shown) incident on the flange portion 910a is also emitted in a direction different from the desired direction, like the light LA9 described above.

  Thus, in the lighting fixture of the comparative example which has the lens member 910, there exists a problem that light distribution cannot be controlled efficiently.

  On the other hand, as shown in FIG. 6B, in the lens member 10 according to the present embodiment, the light L1 emitted from the LED light source 31 is refracted by the refracting surface 12b of each convex portion 12 and enters the lens member 910. The light L1 is reflected by the reflecting surface 12a of the convex portion 12, and is emitted from the light emitting surface of the lens member 10 in a desired direction.

  Here, of the light L1 emitted from the LED light source 31, the light LA1 toward the emission port edge of the reflecting member 20 is the refracting surface 12b of the convex portion 12A arranged at the outermost diameter among the plurality of convex portions 12. After being refracted and entering the lens member 910, the light is reflected by the reflecting surface 12a of the convex portion 12A and emitted from the light emitting surface of the lens member 10 in a desired direction. That is, the light LA1 is emitted in a desired direction in the same manner as the light L1 other than the light LA1.

  Therefore, the lighting fixture 1 according to the present embodiment having the lens member 10 can control the light distribution more efficiently than the lighting fixture of the comparative example having the lens member 910.

<2. Appearance noise>
Next, appearance noise of the lighting fixture 1 according to the present embodiment will be described while comparing with the lighting fixture of the comparative example.

  As shown in FIG. 5, the lens member 910 in the comparative example has a notch portion 911 that is formed at the end portion of the light emitting surface and abuts against the tip end portion of the locking claw 921 of the reflecting member 920. Specifically, the cutout portion 911 is formed by cutting out the light emitting surface and the side surface of the lens member 910. FIG. 7 shows a state in which such a lens member 910 and the reflecting member 920 are assembled.

  FIG. 7 is a diagram for explaining the optical member and the reflecting member in the lighting fixture in the comparative example, (a) is a perspective view of the optical member and the reflecting member that fixes the optical member, and (b) is ( It is the perspective view which expanded the X 'part of a). As shown in FIG. 7B, the locking claw 921 is exposed on the light emitting surface of the lens member 910.

  Therefore, when the lens member 910 and the reflection member 920 are assembled and viewed from the light emitting side of the lens member 910, the locking claw 921 is clearly visible as shown in FIG. 8A. FIG. 8A is a partial plan view of the lighting fixture in the comparative example for describing an example of the effect of the lighting fixture according to the embodiment.

  As shown in the figure, in the lighting fixture of the comparative example, the lens member 910 and the reflection member 920 are combined in a state where the lens member 910 and the reflection member 920 are combined by providing a notch 911 at the end of the light emitting surface of the lens member 910. When the member 910 is viewed from the light emitting side, the locking claw 921 is clearly visually recognized. That is, there is a problem that appearance noise is generated that the quality of the appearance is impaired by the locking claw 921.

  On the other hand, when the lens member 10 and the reflection member 20 in the present embodiment are assembled and viewed from the light emitting side of the lens member 10, as shown in FIG. Not visible. FIG. 8B is a partial plan view of the lighting fixture 1 according to the embodiment for describing an example of the effect of the lighting fixture 1 according to the embodiment.

  As shown in the figure, in the lighting fixture 1 according to the embodiment, the locking claw 21 is inserted into the recess 11 provided on the side surface of the lens member 10, thereby combining the lens member 10 and the reflection member 20. In this state, when the lens member 10 is viewed from the light emitting side, the locking claws 21 are not easily seen.

  Therefore, the lighting fixture 1 according to the present embodiment having the lens member 10 has the lens member 10 in a state where the lens member 10 and the reflecting member 20 are combined, as compared with the lighting fixture of the comparative example having the lens member 910. Appearance noise when viewed from the light emitting side can be reduced.

[effect]
The luminaire 1 according to the present embodiment has an LED light source 31, an opening at the end, a cylindrical reflection member whose inner surface reflects light from the LED light source 31, and a reflection member fixed so as to close the opening. The lens member 10 has a convex portion that controls light distribution, and the convex portion protrudes toward the LED light source 31 and is disposed on the periphery of the lens member 10.

  As described above, the lens member 10 has the convex portion 12A arranged at the periphery, so that the lens member 10 can emit light in a desired direction from the periphery. It can be. Therefore, light distribution can be controlled efficiently.

  The convex portion 12A includes a refracting surface 12b that refracts incident light and a reflecting surface 12a that reflects light refracted by the refracting surface 12b. The reflecting surface 12a and the inner surface of the reflecting member 20 are not in contact with each other. Touching.

  Thereby, light distribution can be controlled more efficiently. Specifically, the light reflected by the inner surface of the reflecting member 20 and incident on the reflecting surface 12a of the convex portion 12A is emitted in a direction different from the desired emitting direction of the lens member 10. On the other hand, the space (gap) between the lens member 10 and the reflecting member 20 can be suppressed when the reflecting surface 12a of the convex portion 12A and the inner surface of the reflecting member 20 come into contact with each other. Therefore, since the light reflected by the inner surface of the reflecting member 20 and entering the reflecting surface 12a of the convex portion 12A can be suppressed, the light emitted in a direction other than the desired emitting direction can be suppressed. In other words, since the light irradiated outside the desired irradiation range of the luminaire 1 can be suppressed, it is possible to suppress the decrease in the luminous flux in the desired irradiation range.

  It should be noted that there may be a gap between the reflecting surface 12 a and the inner surface of the reflecting member 20 in a part of the exit of the reflecting member 20.

  The lens member 10 has a plurality of convex portions 12 including a convex portion 12A, and the plurality of convex portions 12 are arranged concentrically.

  That is, in this embodiment, the lens member 10 is a Fresnel lens. The configuration of the lens member is not limited to this. For example, a lens member in which a refracting surface is formed in the central portion of the light incident surface and a reflecting surface is formed in a region excluding the central portion may be used.

  Further, the reflecting member 20 has a locking claw 21 that protrudes from an opening edge (an exit opening edge) at the end and is fixed by locking the lens member 10.

  Thereby, the lens member 10 can be fixed to the reflecting member 20 without using fixing components (for example, a screw and an adhesive). Therefore, it is possible to avoid a decrease in light extraction efficiency, appearance noise, and an increase in manufacturing cost due to the use of fixing parts.

  In addition, the structure which fixes the lens member 10 is not restricted to the latching claw 21, For example, the adhesive agent transparent with respect to visible light may be sufficient.

  The lens member 10 has a concave portion 11a formed on the side surface of the lens member 10 and into which at least the distal end portion 21a of the locking claw 21 is inserted.

  Thereby, the appearance noise when the lens member 10 is viewed from the light emitting side in a state where the lens member 10 and the reflecting member 20 are combined can be reduced.

  In the present embodiment, the concave portion 11a is formed on the side surface 13a of the base portion 13 of the lens member 10, but is not limited thereto. For example, the recessed part 11a may be formed in the reflective surface 12a which is a side surface of the convex part 12A arranged on the outermost side among the plurality of convex parts 12. That is, the side surface of the lens member 10 includes the side surface 13a of the base portion 13 and the reflection surface 12a of the convex portion 12A.

  In addition, the locking claw 21 has a connecting portion 21b that connects the tip portion 21a and the opening edge (light exit edge), and the tip portion 21a is provided to be bent with respect to the connecting portion 21b. The lens member 10 further has a groove portion 11b that communicates with the concave portion 11a, extends from the concave portion 11a to the light incident side of the lens member 10, and into which the connecting portion 21b is inserted. The bottom surface of the concave portion 11a is a groove portion. It is formed deeper than the bottom surface of 11b.

  As described above, the bottom surface of the recess 11a is formed deeper than the bottom surface of the groove 11b, so that the lens member 10 and the reflecting member 20 can be prevented from dropping off from the reflecting member 20 after the lens member 10 and the reflecting member 20 are assembled. . Specifically, when the upward biasing force (Z-axis plus direction) is applied to the lens member 10 after the lens member 10 and the reflecting member 20 are assembled, the tip 21a of the locking claw 21 is It abuts against a wall formed at the boundary between the recess 11a and the groove 11b. Therefore, it is possible to suppress the lens member 10 from falling off the reflecting member 20.

  Further, since the groove portion 11b is formed, not only the tip portion 21a but also the connection portion 21b becomes difficult to see when the luminaire 1 is viewed from the light emitting side of the lens member 10, and the appearance noise can be further suppressed. .

  In the present embodiment, the groove portion 11b communicates with the concave portion 11a and is formed on the side surface 13a of the base portion and the reflective surface 12a of the convex portion 12A, but is not limited thereto. For example, when the concave portion 11a is formed on the side surface 13a of the base portion 13 of the lens member 10 and the reflective surface 12a of the convex portion 12A, the groove portion 11b communicates with the concave portion 11a and connects to the reflective surface 12a of the convex portion 12A. It may be formed.

  Moreover, the shape of the latching claw 21 and the shape of the recessed part 11 are not restricted to the shape shown in this Embodiment. For example, the engaging claw may have a shape that increases in thickness as it moves away from the edge of the exit opening, and the recessed portion may have a shape that becomes deeper as it approaches the surface on the light exit side of the lens member.

(Modification)
Next, the lighting fixture which concerns on the modification of this Embodiment is demonstrated using FIG. FIG. 9 is a partial plan view of a lighting fixture according to a modification of the embodiment. The configuration other than the lens member 210 shown in FIG. 9 is the same as the configuration of FIG. FIG. 9 is a plan view when the lens member 210 and the reflecting member 20 in the modified example are assembled and viewed from the light emitting side of the lens member 210. FIG.

  As shown in the figure, the lens member 210 in the present modification is provided with a wrinkle 211 in a region in the circumferential direction including a region overlapping the locking claw 21 when viewed from the light emitting side, on the surface on the light emitting side. ing. For example, the embossing 211 may be provided over the entire circumference of the light emitting side surface of the lens member 210.

  Thereby, the lighting fixture which concerns on this modification is a case where the lens member 210 is seen from the light emission side in the state which combined the lens member 210 and the reflection member 20, compared with the lighting fixture 1 which concerns on Embodiment 1. FIG. The appearance noise can be further reduced.

  Specifically, in Embodiment 1, when the lens member 10 is viewed from the light emitting side in a state where the lens member 10 and the reflecting member 20 are combined, the locking claw 21 may be visually recognized. On the other hand, in the present modification, the lens member 210 is light-transmitted in a state where the lens member 210 and the reflecting member 20 are combined by providing the embossment 211 in a region overlapping the locking claw 21 on the light emitting side surface of the lens member 210. When viewed from the exit side, the locking claw 21 is less visible and the appearance noise can be reduced.

  In addition, when the embossing is provided only in a region of the light emitting side surface that overlaps with the engaging claw 21 when viewed from the light emitting side, the engaging claw 21 becomes difficult to visually recognize, but the appearance noise is generated by the embossing. To do. On the other hand, in this modified example, by providing the embossing 211 not only in the area overlapping the locking claw 21 but also in the circumferential area including the area, appearance noise due to the embossing 211 can be suppressed. it can.

(Other)
As mentioned above, although the lighting fixture which concerns on this invention was demonstrated based on embodiment and a modification, this invention is not limited to these embodiment and a modification.

  For example, in the above-described embodiment and modification, the LED light source 31 is configured to emit white light by a blue LED and a yellow phosphor, but the present invention is not limited to this. For example, a phosphor-containing resin containing a red phosphor and a green phosphor may be used so that white light is emitted by combining this with a blue LED.

  Moreover, in said embodiment and modification, although LED31b used LED which light-emits blue, it is not restricted to this. As LED 31b, you may use LED which light-emits colors other than blue. For example, when an LED chip that emits ultraviolet light is used as the LED 31b, the phosphor particles may be a combination of phosphor particles that emit light in three primary colors (red, green, and blue). Furthermore, a wavelength conversion material other than the phosphor particles may be used. For example, the wavelength conversion material absorbs light of a certain wavelength such as a semiconductor, a metal complex, an organic dye, or a pigment, and has a wavelength different from the absorbed light. A material containing a substance that emits light may be used.

  Further, in the above embodiments and modifications, the LED is exemplified as the light emitting element, but a semiconductor light emitting element such as a semiconductor laser, a light emitting element such as an organic EL (Electro Luminescence), or an inorganic EL may be used.

  Moreover, in said embodiment and modification, although the LED light source was illustrated as a light source, you may use light sources, such as a light bulb.

  Moreover, in said embodiment and modification, although the reflecting member 20 reflected the light which injected from the incident port, you may guide the light which bounced off by the lens member 10 to the output port again. That is, the light reflected by the lens member 10 may be reflected and emitted from the emission port.

  In the embodiment and the modification described above, the lens member 10 has the plurality of concentric convex portions 12 centered on the optical axis of the lens member 10 on the light incident side. The shape of the part 12 is not limited to the concentric circle shape, and may be any ring shape. For example, the shape of the plurality of convex portions may be a polygonal ring such as a square ring, or may be an elliptical ring. That is, the shape of a some convex part should just be a concentric annular shape.

  In the embodiment and the modification described above, the LED light source 31 has a COB (Chip On Board) type configuration in which the LED chip is directly mounted on the substrate 31a and the LED chip is collectively sealed with a phosphor-containing resin. However, it is not limited to this. For example, it is configured by mounting a plurality of LED elements on a substrate using a package type LED element in which an LED chip is mounted in a resin-molded cavity and a phosphor-containing resin is sealed in the cavity. A surface mount type (SMD) LED light source may be used.

  In addition, as long as it does not deviate from the gist of the present invention, various modifications conceived by those skilled in the art are applied to the present embodiment and the modified examples, or a form constructed by combining the constituent elements in the embodiments and modified examples, It is included within the scope of the present invention.

1 Lighting fixture 10, 210, 910 Lens member (optical member)
11, 11a, concave portion 11b groove portion 12, 12A, 912, 912A convex portion 12a, 912a reflective surface 12b, 912b refractive surface 13 base portion 13a side surface 20, 920 reflective member 21, 921 locking claw 21a tip portion 21b connecting portion 30 light source portion 31 LED light source
31a Substrate 31b LED
31c Sealing member 40 Housing 41 Main body 42 Heat radiation fin 211 Wrinkle 910a Flange 911 Notch L1, LA1, L9, LA9 Light

Claims (7)

A light source;
A cylindrical reflecting member that has an opening at an end and whose inner surface reflects light from the light source;
An optical member fixed by the reflecting member so as to close the opening,
The reflective member has a locking claw,
The optical member has a convex part that controls the light distribution of the light, and a concave part that the locking claw locks,
The convex portion protrudes toward the light source, and is disposed on the periphery of the optical member.
The concave portion is provided in a part of the periphery of the optical member ,
The said recessed part is a lighting fixture formed so that only the said side surface may be notched among the light-projection surfaces and side surfaces of the said optical member . The convex portion has a refracting surface that refracts incident light and a reflecting surface that reflects light refracted by the refracting surface,
The lighting fixture according to claim 1, wherein the reflecting surface and the inner surface of the reflecting member are in contact with each other. The optical member has a plurality of convex portions including the convex portion,
The lighting apparatus according to claim 1, wherein the plurality of convex portions are arranged concentrically. The lighting fixture according to any one of claims 1 to 3, wherein the locking claw protrudes from an opening edge of the end portion and is fixed by locking the optical member. The recess luminaire according to any one of claims 1 to 4, at least the tip portion of the front Symbol locking pawl is inserted. A light source;
A cylindrical reflecting member that has an opening at an end and whose inner surface reflects light from the light source;
An optical member fixed by the reflecting member so as to close the opening,
The optical member has a convex portion for controlling the light distribution of the light,
The convex portion protrudes toward the light source, and is disposed on the periphery of the optical member.
The reflection member protrudes from the opening edge of the end portion, and has a locking claw that fixes the optical member by locking,
The optical member is formed on a side surface of the optical member, and has a recess into which at least a tip portion of the locking claw is inserted.
The locking claw has a connection portion that connects the tip end portion and the opening edge,
The tip portion is provided to be bent with respect to the connection portion,
The optical member further has a groove portion that communicates with the concave portion, extends from the concave portion to the light incident side of the optical member, and into which the connection portion is inserted.
The bottom surface of the recess is formed deeper than the bottom surface of the groove. The said optical member is provided with the embossment in the area | region of the circumferential direction containing the area | region which overlaps with the said latching claw when it sees from the light emission side among the surfaces by the side of a light emission. The lighting fixture as described in.

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