JP7340822B2 - lighting equipment - Google Patents

Description

The present disclosure relates to lighting fixtures.

Downlights as lighting equipment with a light source embedded in the ceiling are well known. For example, Patent Document 1 discloses a downlight including a cylindrical reflector.

Japanese Patent Application Publication No. 2010-170739

Some downlights have a main body that supports a reflector in a tiltable manner. In a downlight in which a reflector is tiltably supported by the main body, when the reflector is tilted significantly with respect to the main body, light may leak from the gap between the main body and the reflector.

An object of the present disclosure is to provide a lighting fixture that can prevent light leakage when the reflector is tilted significantly.

A lighting fixture that is one aspect of the present disclosure is a lighting fixture that includes a light source section, a main body that supports the light source section, and a reflecting plate that reflects light emitted from the light source section, wherein the reflecting plate is a main body that supports the light source section. The reflection plate is formed into a cylindrical shape that can be tilted toward one side in a predetermined direction and whose diameter increases toward the emission direction, and a substantially semi-cylindrical wall is provided on the small diameter side of the reflector and on the other side in the predetermined direction. part is formed.

According to one aspect of the present disclosure, it is possible to provide a lighting fixture that can prevent light leakage when the reflector is tilted significantly.

FIG. 2 is a perspective view showing the external configuration of the lighting fixture. FIG. 3 is a side sectional view showing the internal configuration of the lighting fixture. FIG. 3 is a perspective view showing a reflector. It is a side sectional view showing a reflector. FIG. 3 is a perspective view showing the configuration of peripheral parts of the light source section. It is a perspective view showing a light shielding plate. It is a side sectional view showing a light shielding plate.

Hereinafter, an example of the embodiment will be described in detail with reference to the drawings. Since the drawings referred to in the embodiments are schematically described, the dimensions of the components drawn in the drawings should be determined with reference to the following description. In this specification, the expression "approximately" is intended to include not only completely the same, but also cases where the terms are considered to be substantially the same, taking "substantially the same" as an example. The embodiments described below are examples, and the lighting fixture of the present disclosure is not limited thereto.

The configuration of the lighting fixture 100 will be described using FIGS. 1 and 2. FIG. 1 is a perspective view showing the external configuration of the lighting fixture 100. FIG. 2 is a side sectional view showing the internal configuration of the lighting fixture 100.

The lighting fixture 100 of this embodiment is a downlight that is embedded and installed in the ceiling. When the lighting fixture 100 is installed, the reflector 40 is fixed to the ceiling surface.

In the lighting fixture 100 of this embodiment, the reflection plate 40 is supported so as to be tiltable toward one side in a predetermined direction with respect to the main body 10. Therefore, the lighting fixture 100 can change its attitude from the "maximum tilt attitude" to the "vertical attitude". The lighting fixture 100 shown in FIGS. 1 and 2 is in the "maximum tilted position." In the "vertical position", the optical axis J of the lighting fixture 100 substantially coincides with the vertical direction.

In the following, the XYZ directions will be defined as shown in each figure. That is, the ceiling surface to which the reflector 40 is fixed is defined as the XY plane. The vertical direction perpendicular to the ceiling surface is defined as the Z direction. The main body 10 is inclined with respect to the reflecting plate 40 along the YZ plane. In the "maximum tilt attitude", the main body 10 tilts toward the rear side in the Y direction with respect to the reflector 40. In other words, in the "maximum tilted posture", the reflector 40 tilts toward the rear side in the Y direction with respect to the main body 10. To make the explanation easier to understand, members other than the reflector 40 will be explained assuming that the lighting fixture 100 is in a "vertical state".

The lighting fixture 100 includes a main body 10, a mounting base 20, a support base 30, a reflection plate 40, a light source section 50, a light shielding plate 60, and a lens 70.

The main body 10 holds a light source section 50. The main body 10 is formed into a substantially cylindrical shape. The main body 10 is formed from a heat radiation part 10A and a bottom part 10B.

A plurality of fins are formed in the heat radiation section 10A. The heat dissipation section 10A is formed above the bottom section 10B. The heat radiation section 10A radiates heat generated in the light source section 50 to the surrounding air. The heat dissipation section 10A is made of a metal material with high thermal conductivity, such as aluminum or aluminum alloy.

The bottom portion 10B is formed into a substantially disk shape. A light source section 50, a holding member 55, and two connecting members 56 are attached to the lower surface of the bottom section 10B (see FIG. 5). Details of the light source section 50, the holding member 55, and the connecting member 56 will be described later.

The mounting base 20 is fixed to the lower side of the main body 10. The mounting base 20 is formed into a substantially cylindrical shape. The inner surface of the mounting base 20 is black. A light shielding plate 60 and a lens 70 are housed inside the mounting base 20. Details of the light shielding plate 60 and the lens 70 will be described later.

In this embodiment, "being black" means that black paint is applied to the member, but the present disclosure is not limited thereto. In the present disclosure, "being black" includes the use of a member made of a black material in advance. The same applies below.

The support stand 30 is fixed to the lower side of the mounting stand 20. The support stand 30 is formed into a substantially cylindrical shape with an oblique cutout on the lower side. More specifically, the opening on the lower side of the support base 30 is formed to be inclined rearward and upward.

The reflecting plate 40 reflects the light emitted from the light source section 50. The reflection plate 40 is supported under the support base 30 so as to be tiltable toward the rear side in the Y direction. The reflecting plate 40 is formed into a substantially cylindrical shape whose diameter increases toward the emission direction (downward in the Z direction). The reflecting plate 40 is supported on the lower side of the support base 30 via a leaf spring S (not shown) as an elastic member. When the lighting fixture 100 is installed, the reflector 40 is fixed to the ceiling surface. Details of the reflection plate 40 will be described later.

The reflective plate 40 is supported by the support base 30 via a support plate 45 so as to be tiltable toward the rear side in the Y direction. An arcuate long hole 45A is formed in the upper part of the support plate 45. The support plate 45 is fastened to the support stand 30 by screws N passing through the elongated holes 45A of the support plate 45. The lower part of the support plate 45 is fixed to the reflection plate 40. With such a configuration, by changing the fastening position of the screw N in the elongated hole 45A, the inclined position of the reflection plate 40 with respect to the support base 30 can be changed.

With such a configuration, the main body 10, the mounting base 20, and the support base 30 can be tilted toward the rear in the Y direction with respect to the reflection plate 40 fixed to the ceiling surface. In this way, the lighting fixture 100 can change its posture from a "vertical posture" to a "maximum tilted posture."

The light source section 50 is a light emitting module having a light emitting element. The light emitting element is, for example, an LED (Light Emitting Device) that emits predetermined light radially.

The light source section 50 is composed of a COB (Chip On Board) type LED, and includes a base 51 and a light emitting section 52 (see FIG. 5). The light emitting unit 52 includes a plurality of LED chips that are bare chips (LED chips) mounted on the base 51 and a sealing member that seals the LED chips.

The lens 70 has a function of controlling the distribution of light incident from the light source section 50 and emitting the light. The light incident surface of the lens 70 is dimpled. A Fresnel lens consisting of a plurality of prisms arranged concentrically is formed on the light exit surface of the lens 70.

With such a configuration, the lens 70 can diffuse the emitted light. Further, the lens 70 can suppress uneven illuminance and color unevenness of light. Furthermore, the lens 70 can illuminate the object uniformly.

The configuration of the reflection plate 40 will be explained using FIGS. 3 and 4. FIG. 3 is a perspective view showing the configuration of the reflecting plate 40. As shown in FIG. Further, FIG. 4 is a side sectional view showing the configuration of the reflecting plate 40. As shown in FIG.

As described above, the reflecting plate 40 is formed into a substantially cylindrical shape whose diameter increases downward in the Z direction. The reflecting plate 40 is formed by molding. The reflecting plate 40 is made of resin, for example. The reflecting plate 40 is formed with a main body 41, a wall portion 42, two spring holding portions 43 as protrusions, and a wire fixing portion 44 as a protrusion. The main body 41, the wall portion 42, the spring holding portion 43, and the wire fixing portion 44 are integrally formed.

The main body 41 is formed into a substantially cylindrical shape whose diameter increases downward in the Z direction. More specifically, the main body 41 is formed into a substantially cylindrical shape whose diameter increases from a small diameter end 41A on the upper end side to a large diameter end 41B on the lower end side. The small diameter end portion 41A is formed to be inclined rearward and downward.

The inner surface 41C of the main body 41 is mirror-finished by, for example, aluminum vapor deposition, and is formed as a reflective surface. With such a configuration, light is well reflected on the reflective surface. The reflective surface is not limited to mirror treatment by aluminum vapor deposition. For example, a reflective film such as a metal thin film or a dielectric multilayer film may be formed by a method such as thermal evaporation, electron beam evaporation, sputtering, or plating.

The wall portion 42 is formed into a substantially semi-cylindrical shape. The wall portion 42 is formed on the front side of the small diameter end portion 41A of the main body 41 in the Y direction. The wall portion 42 is formed to extend upward in the Z direction. Each side end surface 42A of the wall portion 42 is formed on the left and right sides in the Y direction. The side end surface 42A is formed to be inclined backward and downward in the Y direction.

The inner surface 42B of the wall portion 42 is black. Further, the inner surface 42B of the wall portion 42 is formed with unevenness along the Z direction.

The spring holding portion 43 holds the leaf spring S. The spring holding portions 43 are formed on the left and right sides of the outer surface of the wall portion 42, respectively. The spring holding portion 43 is formed into a substantially U-shape when viewed in cross section on the YZ plane. The position where the spring holding part 43 is formed is not particularly limited as long as it is the outer surface of the wall part 42. More specifically, the spring holding part 43 holds the plate spring S by the plate spring S coming into contact with the end surface of the spring holding part 43 .

A fall prevention wire (not shown) is fixed to the wire fixing part 44 . The wire fixing part 44 is formed on the front side of the outer surface of the wall part 42 in the Y direction. The position where the wire fixing part 44 is formed is not particularly limited as long as it is the outer surface of the wall part 42.

The wire fixing portion 44 is formed into a substantially inverted U-shape when viewed in cross section on the XZ plane. A crimp terminal attached to one end of the wire is formed on the upper surface of the wire fixing part 44 so as to fit therein.

The "projection" of the present disclosure includes, but is not limited to, the spring holding part 43 and the wire fixing part 44 of the present embodiment. The "protrusion" in the present disclosure includes anything that is designed to protrude from the outer surface of the wall 42.

The function and effect of the reflection plate 40 will be explained. According to the reflecting plate 40, by forming the wall portion 42, light does not leak from the gap between the reflecting plate 40 and the support base 30 even when the lighting fixture 100 is in the "maximum tilt state".

Further, for example, if a protrusion is formed on the outer surface of the main body 41 of the reflecting plate 40, there is a possibility that sink marks may occur on the inner surface 41C of the main body 41. When the inner surface 41C of the main body 41 is mirror-finished by aluminum vapor deposition, sink marks will occur on the mirror surface. The sink marks that occur on the mirror surface are very noticeable and impair the appearance.

However, according to the reflective plate 40, by forming the wall portion 42 and forming the spring holding portion 43 and the wire fixing portion 44 on the wall portion 42, sink marks occur on the wall portion 42 during molding of the reflective plate 40. The occurrence of sink marks on the wall portion 42 during molding does not cause sink marks on the mirror-treated inner surface 41C of the main body 41.

According to the reflector 40, by making the inner surface 42B of the wall portion 42 black, it is possible to suppress unevenness of light reflected on the inner surface 42B.

According to the reflective plate 40, by forming the unevenness on the inner surface 42B of the wall portion 42, it is possible to make sink marks that occur during molding of the reflective plate 40 less noticeable.

According to the reflector 40, by forming the side end surface 42A of the wall 42 to be inclined backward and downward in the Y direction, the wall 42 and the support stand can be easily connected even in the "maximum inclination state". 30 or the wall portion 42 and the lens 70.

The configuration of peripheral parts of the light source section 50 will be described using FIG. 5. Note that FIG. 5 is a perspective view showing the configuration of peripheral parts of the light source section 50.

As described above, the light source section 50, the holding member 55, and the two connecting members 56 are attached to the lower surface of the bottom portion 10B of the main body 10.

The holding member 55 is formed into an elliptical shape with an opening at approximately the center in the XY plane. The light source section 50 is held in the open substantially central portion of the holding member 55 . The holding member 55 is made of an insulating resin material. The holding member 55 is white.

The connecting member 56 supports the light source section 50 and functions as a connector for supplying electricity. The connecting member 56 includes an electrode section inside. The connecting member 56 is made of an insulating resin material. The connecting member 56 is white.

The electrode portion is formed using a conductive material such as metal. The electrode portions are respectively brought into contact with a pair of electrode terminals (not shown) provided on the light source portion 50. A high potential wiring is electrically connected to one connecting member 56, and a low potential wiring is electrically connected to the other connecting member 56.

The "surrounding parts of the light source section" in the present disclosure corresponds to the holding member 55 and the connection member 56 in the present embodiment, but is not limited thereto. “Components surrounding the light source unit” of the present disclosure includes other components provided around the light source unit 50.

The functions and effects of parts surrounding the light source section 50 will be explained. For example, when the surrounding parts of the light source section 50 are made black, the surrounding parts of the light source section 50 absorb light from the light source section 50 and increase in temperature. However, by making the surrounding parts of the light source section 50 white as in this embodiment, the temperature of the surrounding parts does not increase due to absorption of light from the light source section 50. In this way, by making the surrounding parts of the light source section 50 white, it is possible to prevent the temperature of the surrounding parts from rising.

The configuration of the light shielding plate 60 will be explained using FIGS. 6 and 7. FIG. 6 is a perspective view showing the configuration of the light shielding plate 60. FIG. 7 is a side sectional view showing the configuration of the light shielding plate 60. As described above, the light shielding plate 60 will be explained according to the YZ direction shown in FIG. 7 assuming that the lighting fixture 100 is in a "vertical state".

The light shielding plate 60 has a function of blocking part of the light emitted from the light source section 50. The light shielding plate 60 is housed inside the mounting base 20 as described above. The light shielding plate 60 is provided inside the mounting base 20 between the light source section 50 and the lens 70.

The light shielding plate 60 is formed into a substantially disk shape in which a circular opening 65 is formed. The center of the opening 65 substantially coincides with the center of the optical axis J. The light shielding plate 60 includes a main body 61, a wall portion 62, and a mounting portion 63.

The main body 61 is formed into a disk shape in which a circular opening 61A is formed. The lower surface of the main body 61 (the surface facing the lens 70) is black.

The wall portion 62 is formed into a substantially cylindrical shape whose diameter increases downward in the Z direction. The wall portion 62 is formed along the opening 61A of the main body 61. The upper end of the wall 62 forms an opening 65 . The inner surface of the wall portion 62 (the surface facing the lens 70) is black.

The attachment portion 63 is formed to protrude toward the outside of the main body 61. The mounting portion 63 is fixed to the inner surface of the mounting base 20.

The function and effect of the light shielding plate 60 will be explained. According to the light shielding plate 60, it is possible to prevent the light reflected from the surrounding parts of the light source section 50, which is white, from entering the lens 70.

According to the light shielding plate 60, by forming the opening 65, the light emitted from the light source section 50 can reliably enter the lens 70.

According to the light shielding plate 60, by making the lower surface of the main body 61 and the inner surface of the wall portion 62 black, it is possible to suppress the unevenness of light reflected on the lower surface of the main body 61 and the inner surface of the wall portion 62.

The effects of the lighting fixture 100 will be explained. According to the lighting fixture 100, light leakage can be prevented when the reflecting plate 40 is tilted significantly.

That is, according to the lighting fixture 100, by forming the wall portion 42 on the reflecting plate 40, even when the lighting fixture 100 is in the "maximum inclination state", light is transmitted through the gap between the reflecting plate 40 and the support base 30. will not leak.

10 main body, 20 mounting base, 30 support base, 40 reflector, 41A small diameter end, 41C inner surface, 42 wall, 42A side end surface, 42B inner surface, 43 spring holding section, 44 wire fixing section, 50 light source section, 55 holding member (surrounding parts of the light source section 50), 56 connection member (surrounding parts of the light source section 50), 60 light shielding plate, 61A opening, 70 lens, 100 lighting fixture, J optical axis, S leaf spring

Claims (9)

A lighting fixture comprising a light source section, a main body holding the light source section, and a reflecting plate that reflects light emitted from the light source section,
The reflecting plate is tiltable toward one side in a predetermined direction with respect to the main body, and is formed in a cylindrical shape whose diameter increases toward the emission direction,
A substantially semi-cylindrical wall portion is formed on the small diameter side of the reflecting plate and on the other side in the predetermined direction,
A protrusion is formed on the outer surface of the wall ,
The reflecting plate is supported by the main body via an elastic member,
The lighting fixture , wherein the protrusion holds the elastic member . A lighting fixture comprising a light source section, a main body that holds the light source section, and a reflector that reflects light emitted from the light source section,
The reflecting plate is tiltable toward one side in a predetermined direction with respect to the main body, and is formed in a cylindrical shape whose diameter increases toward the emission direction,
A substantially semi-cylindrical wall portion is formed on the small diameter side of the reflecting plate and on the other side in the predetermined direction,
A protrusion is formed on the outer surface of the wall ,
A lighting fixture , wherein a fall prevention wire is fixed to the protrusion . The lighting fixture according to claim 1 or 2 , wherein the inner surface of the wall portion is black. The lighting fixture according to any one of claims 1 to 3 , wherein unevenness is formed on the inner surface of the wall portion. The lighting fixture according to any one of claims 1 to 4 , wherein a side end surface of the wall portion is inclined. a lens that controls the distribution of light emitted from the light source;
further comprising a light shielding plate provided between the light source section and the lens,
parts surrounding the light source part are white;
A lighting fixture according to any one of claims 1 to 5 . The lighting fixture according to claim 6 , wherein the light shielding plate has an opening formed therein. The lighting fixture according to claim 6 or 7 , wherein a surface of the light shielding plate facing the lens is black. further comprising a mounting base for storing the light shielding plate,
The lighting fixture according to any one of claims 6 to 8 , wherein the inner surface of the mount is black.

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