JP2019012618A - Lighting device - Google Patents

Abstract

To provide a lighting device that can suppress rise of temperature of a lens that is disposed inside a lighting fixture body.SOLUTION: A lighting device 10 includes: a lighting fixture body 90; a light source 70 disposed inside the lighting fixture body 90; and a cylindrical baffle 40 disposed inside the lighting fixture body 90 and surrounding an optical axis J of the light source 70, the baffle 40 having an inner diameter that is reduced as coming close to the light source 70; a lens 60 disposed between the baffle 40 and the light source 70 and controlling distribution of light from the light source 70; and a cylindrical hood 30 fixed at an inner surface of the baffle 40 while being separated from the lens 60 and surrounding the optical axis J.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a lighting apparatus including a cylindrical hood.

  In a conventional lighting fixture, for example, a lighting fixture for a spotlight, a lamp body having an opening for emitting light, a light source attached to the inside of the lamp body, and a reflection for controlling the light distribution of the emitted light from the light source A member and a lens are provided (see, for example, Patent Document 1).

  In the lighting fixture disclosed in Patent Document 1, the glare cutoff angle is further increased by attaching a cylindrical hood to the shade portion of the lamp body.

JP 2017-84729 A

  In the lighting fixture disclosed in Patent Document 1, in order to stably fix the elastically deformable hood to the lamp body, the hood is inserted to the position of the lens inside the lamp body. Here, when the light from the light source is irradiated to the lens side end of the hood, the temperature of the lens side end increases. Further, since the lens is generally formed of acrylic or the like having a relatively low heat resistance, the temperature of the lens can rise above the heat resistant temperature as the temperature of the lens side end of the hood increases. For this reason, especially when the output of a lighting fixture is high, the hood disclosed in Patent Document 1 cannot be used.

  Therefore, the present invention provides a lighting fixture that includes a hood and that can suppress an increase in the temperature of a lens disposed inside the lamp body.

  In order to solve the above-described problems, an aspect of a lighting fixture according to the present invention includes a lamp body, a light source disposed inside the lamp body, an interior of the lamp body, and an optical axis of the light source. A cylindrical baffle surrounding the baffle having an inner diameter that decreases as it approaches the light source; a lens that is disposed between the baffle and the light source and that controls light distribution from the light source; and the lens And a cylindrical hood that is fixed to the inner surface of the baffle and is surrounded by the optical axis.

  ADVANTAGE OF THE INVENTION According to this invention, the lighting fixture which can suppress the temperature rise of the lens arrange | positioned inside a lamp main body can be provided.

FIG. 1 is a perspective view illustrating an appearance of a lighting apparatus according to an embodiment. FIG. 2 is a partially exploded perspective view of the lighting apparatus according to the embodiment. FIG. 3 is a perspective view showing the configuration of the baffle according to the embodiment. FIG. 4 is a cross-sectional view of the lighting fixture according to the embodiment. FIG. 5 is a partially enlarged cross-sectional view of the lighting apparatus according to the embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Each of the embodiments described below shows a specific example of the present invention. Therefore, the numerical values, shapes, materials, components, component arrangement positions, connection forms, and the like 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 strictly. Moreover, in each figure, the same code | symbol is attached | subjected to the substantially same structure, The overlapping description is abbreviate | omitted or simplified.

(Embodiment)
[1. Constitution]
The structure of the lighting fixture which concerns on Embodiment 1 is demonstrated using drawing.

  FIG. 1 is a perspective view showing an appearance of a lighting fixture 10 according to the present embodiment. FIG. 2 is a partially exploded perspective view of the lighting fixture 10 according to the present embodiment. In FIG. 2, the holding member 20, the hood 30, the baffle 40, the regulating member 50, the lens 60, and the light source 70 are shown in an exploded manner in the lighting fixture 10. FIG. 3 is a perspective view showing the configuration of the baffle 40 according to the present embodiment. FIG. 4 is a cross-sectional view of the lighting fixture 10 according to the present embodiment. FIG. 4 shows a cross section passing through the optical axis J of the light source 70 of the luminaire 10. FIG. 5 is a partially enlarged cross-sectional view of the lighting fixture 10 according to the present embodiment. FIG. 5 shows an enlarged view of the inside of the broken line frame V shown in FIG.

  As shown in FIGS. 1 and 2, the luminaire 10 is a spotlight, and includes a holding member 20, a hood 30, a lamp body 90, an arm 97, and a power supply box 98. As shown in FIGS. 2 and 4, the lighting fixture 10 further includes a baffle 40, a regulating member 50, a lens 60, and a light source 70. In addition, as illustrated in FIG. 4, the lighting fixture 10 further includes a lens holding member 80 and a base 92. Hereinafter, each component of the lighting fixture 10 is demonstrated. In the present embodiment, the light emission side of the light source 70 is the front side, and the opposite side of the front side is the rear side.

[1-1. Lamp body]
The lamp body (apparatus body) 90 is a cylindrical member in which a light source 70 is disposed and emits light from the light source 70 to the outside. A side opening 91 is formed in the lamp body 90. The side opening 91 is a slit-like opening provided on the side surface of the lamp main body 90, and the arm 97 is disposed.

  As shown in FIG. 4, in addition to the light source 70, a baffle 40, a regulating member 50, a lens 60, a lens holding member 80, a base 92, and the like are disposed inside the lamp body 90.

  The lamp body 90 is made of a metal material such as aluminum, for example. In the present embodiment, the lamp body 90 is formed through, for example, an aluminum die casting process.

[1-2. Base]
As shown in FIG. 4, the base 92 is a member that is disposed inside the lamp body 90 and to which the light source 70 and the arm 97 are attached. The base 92 also functions as a heat sink that radiates heat generated from the light source 70. The base 92 is fixed to the lamp body 90 using screws (not shown).

  The base 92 has a light-shielding portion 95 that stands up around the light source 70 toward the front side. The light shielding unit 95 blocks light emitted from the light source 70 in a direction near to the optical axis J. Thereby, it can suppress that the light radiate | emitted from the light source 70 leaks out from the side opening part 91 arrange | positioned at the back side of the light source 70. FIG.

  The base 92 is made of a metal material such as aluminum, for example. In the present embodiment, the lamp body 90 is formed through, for example, an aluminum die casting process.

[1-3. light source]
2 and 4, the light source 70 is a light emitting unit that is disposed inside the lamp body 90 and emits light along the optical axis J. In the present embodiment, the light source 70 is a light emitting module having LEDs (Light Emitting Diodes), and is an LED light source that emits predetermined light radially. The light source 70 is configured to emit white light, for example. The light source 70 is configured by a COB (Chip On Board) type LED, and as shown in FIGS. 2 and 4, a substrate 72, a plurality of LEDs 71 that are bare chips (LED chips) mounted on the substrate 72, and The LED 71 is sealed, and a sealing member including a phosphor is provided. In the present embodiment, the sealing member collectively seals all the LEDs 71, but the configuration of the sealing member is not limited to this. It is good also as a structure which forms a sealing member in the shape of a plurality of lines along the arrangement direction of LED71 arranged in a line.

  The light source 70 is attached to the base 92 shown in FIG. 4 and emits light along the optical axis J. A method for attaching the light source 70 to the base 92 is not particularly limited. The light source 70 may be attached to the base 92 using another member, or may be bonded to the base 92 with an adhesive or the like.

  The substrate 72 is a mounting substrate for mounting the plurality of LEDs 71, and is, for example, a ceramic substrate, a resin substrate, an insulating-coated metal base substrate, or the like. In addition, the substrate 72 has a plate shape having a rectangular plane in a plan view, for example, and the bottom surface (that is, the rear surface) of the substrate 72 is attached to the base 92 and fixed. Although not shown, the substrate 72 has a pair of electrode terminals (a positive electrode terminal and a negative electrode terminal) for receiving DC power for causing the LED 71 (light source 70) to emit light from the outside via a lead wire or the like. Is formed.

[1-4. lens]
The lens 60 is a translucent optical element that is disposed between the baffle 40 and the light source 70 and controls light distribution from the light source 70. In the present embodiment, the lens 60 is a condenser lens that collects light incident on the lens 60. The lens 60 is a Fresnel lens in which the lens structure formed on the light emitting side is made Fresnel.

  As shown in FIGS. 2 and 4, the lens 60 is disposed in front of the light source 70. Specifically, the lens 60 is disposed on the light emission side of the light source 70 with a predetermined distance from the light source 70. Therefore, the lens 60 controls the light distribution of the light emitted from the light source 70 and incident on the lens 60. The lens 60 collimates the light emitted from the light source 70, for example. The optical axis of the lens 60 is preferably substantially coincident with the optical axis J of the light source 70.

  The lens 60 is formed in a predetermined shape so as to have a predetermined lens action. Moreover, the lens 60 is formed using a translucent material. Specifically, the lens 60 is molded into a predetermined shape by a mold or the like using a transparent resin material such as acrylic or polycarbonate, or a transparent material such as a glass material. The lens 60 is held in the lamp body 90 by the lens holding member 80.

[1-5. Lens holding member]
The lens holding member 80 is a member that holds the lens 60. The lens holding member 80 has a cylindrical shape in which an opening through which the optical axis J passes is formed. The lens holding member 80 is held in the lamp body 90.

  Further, the position of the lens holding member 80 is regulated by the regulating member 50 or the like in the lamp body 90. Thereby, the position in the lamp main body 90 of the lens holding member 80 and the lens 60 is controlled.

  The lens holding member 80 holds the lens 60 at the end portion on the side far from the light source 70. More specifically, as shown in FIG. 5, the lens holding member 80 has a claw portion 81 provided at an end portion. As shown in FIG. 5, the lens holding member 80 holds the lens 60 by locking the lens 60 with each claw portion 81. Thus, when the lens holding member 80 formed of a resin material or the like holds the lens 60, the holding structure of the lens 60 can be formed more easily than when the lamp body 90 formed of metal holds the lens 60. .

  The lens holding member 80 can be formed using a hard resin material such as polybutylene terephthalate (PBT).

[1-6. Restriction member]
The restricting member 50 is a member that is disposed inside the lamp body 90 and restricts the position of the lens holding member 80. In the present embodiment, the restricting member 50 is a spring attached to the inside of the lamp body 90. As shown in FIG. 2, the restricting member 50 has a C-shape and includes three restricting portions 51. As shown in FIG. 5, the restriction member 50 is disposed in an annular restriction groove 94 formed on the inner surface of the lamp body 90. The three restricting portions 51 protrude from the inner surface of the lamp body 90 toward the optical axis J and abut against the end portion of the lens holding member 80. Thereby, the restricting member 50 restricts the lens holding member 80 from moving toward the front side.

  The restricting member 50 is formed using, for example, a linear metal member such as stainless steel.

[1-7. Baffle]
The baffle 40 is a member for suppressing glare on the inner surface of the cylindrical shade portion of the lamp body 90. The baffle 40 is a cylindrical member that is disposed inside the lamp body 90 and surrounds the optical axis J. Specifically, the baffle 40 is disposed inside the shade portion of the lamp body 90. The inner diameter of the baffle 40 decreases as it approaches the light source 70. As shown in FIGS. 4 and 5, the baffle 40 is disposed inside the lamp body 90 and on the front side of the lens 60.

  As shown in FIG. 4, the baffle 40 is disposed near the front end of the lamp body 90. The inner surface 44 (surface on the optical axis J side) of the baffle 40 shown in FIGS. 3 and 5 is a glare suppressing surface. Thereby, the glare in the inner surface near the front end of the lamp body 90 is suppressed.

  The inner surface 44 of the baffle 40 is not particularly limited as long as it is a glare suppressing surface. The glare-suppressing surface can be realized, for example, by applying a matte treatment to the surface painted black. Further, the black glare-suppressing surface can be realized by applying a texturing process to a surface coated with black or a surface made of a black member.

  As shown in FIG. 3, the baffle 40 has a protrusion 42 on the outer periphery. As shown in FIG. 5, the baffle 40 is held inside the lamp body 90 by the protrusion 42 being locked in a locking groove 93 formed on the inner surface of the lamp body 90.

  The baffle 40 can be formed using, for example, a resin material such as polycarbonate or PBT.

  In the present embodiment, the hood 30 is fixed to the baffle 40. As shown in FIG. 3, the baffle 40 has a fixing portion 41 that fixes the hood 30. The configuration for fixing the hood 30 in the baffle 40 will be described in detail later.

[1-8. hood]
The hood 30 is a cylindrical member that is fixed to the inner surface 44 of the baffle 40 while being separated from the lens 60 and surrounds the optical axis J.

  As shown in FIG. 2, the hood 30 includes a cylindrical portion 31 having a cylindrical shape, and an annular flange portion 32 disposed at an end portion of the cylindrical portion 31.

  The inner surface of the cylindrical part 31 is a glare suppression surface. In the lighting fixture 10, the glare cutoff angle can be increased by providing the hood 30 having such a glare suppressing surface. Although the structure of the outer surface of the cylindrical part 31 is not specifically limited, For example, you may give the same coating etc. to the outer surface of the cylindrical part 31, and the outer surface of the lamp main body 90. Thereby, since the hood 30 becomes inconspicuous in the external appearance of the lighting fixture 10, the external appearance quality of the lighting fixture 10 can be improved.

  The collar portion 32 is a portion used for fixing the hood 30 to the inner surface 44 of the baffle 40.

  The hood 30 is formed using a metal material, a resin material, or the like. In the present embodiment, the hood 30 is formed of sheet metal using aluminum.

  The fixing configuration on the inner surface of the baffle 40 of the hood 30 will be described in detail later.

[1-9. Holding member]
The holding member 20 is a member that is disposed inside the baffle 40 and holds the hood 30. In the present embodiment, the holding member 20 is a spring that is locked to the inner surface 44 of the baffle 40. Thereby, the holding member 20 which has the simplified structure is realizable. As shown in FIG. 2, the holding member 20 has a C shape and has four locked portions 22. The four locked portions 22 are portions that protrude in a direction away from the optical axis J. The four locked portions 22 are locked to the four fixing portions 41 of the baffle 40, respectively. Thereby, the holding member 20 is fixed to the baffle 40. Thus, the holding member 20 fixed to the baffle 40 and the inner surface 44 of the baffle 40 sandwich the flange portion 32 of the hood 30 so that the hood 30 can be fixed to the baffle 40.

  The holding member 20 has two end portions 21. The two end portions 21 are portions that the user picks when attaching and detaching the holding member 20. As shown in FIGS. 1 and 4, the end 21 is bent toward the front side. Thereby, the user can easily pick the end 21.

  The holding member 20 is formed using, for example, a linear metal member such as stainless steel.

  A method for attaching and detaching the holding member 20 to and from the baffle 40 will be described in detail later.

[1-10. arm]
The arm 97 shown in FIGS. 1, 2, and 4 is a member having one end connected to the power supply box 98 and the other end connected to the base 92. The arm 97 is inserted into the lamp body 90 through the side opening 91 of the lamp body 90.

  Further, an insertion hole is formed in the arm 97 in the longitudinal direction, and a lead wire (not shown) for connecting the power supply box 98 and the light source 70 is disposed in the insertion hole.

  The arm 97 is formed of a metal material such as aluminum. In the present embodiment, the arm 97 is formed through, for example, an aluminum die casting process.

[1-11. Power box]
A power supply box 98 shown in FIGS. 1 and 2 is a housing in which a power supply circuit that supplies power to the light source 70 is built. In the present embodiment, the power supply circuit built in the power supply box 98 converts AC power supplied from the outside of the power supply box 98 into DC power, and the DC power is supplied to the LED 71 of the light source 70 via the lead wire. Supply.

  The outer wall portion of the power supply box 98 is formed from a metal material, a resin material, or the like. In the present embodiment, for example, the outer wall portion is made of aluminum.

[2. Hood fixed configuration]
A fixed configuration of the hood 30 according to the present embodiment will be described.

  As described above, the hood 30 is fixed to the inner surface 44 of the baffle 40. In the present embodiment, the lighting fixture 10 includes a holding member 20 that is locked to the fixing portion 41 of the baffle 40 and holds the hood 30. Thereby, since it becomes unnecessary for hood 30 itself to be provided with a holding structure, the structure of hood 30 can be simplified.

  The hood 30 is fixed to the inner surface 44 of the baffle 40 by the holding member 20. As shown in FIG. 3, the baffle 40 has a fixing portion 41 that fixes the hood 30. In the present embodiment, the hood 30 has four fixing portions 41. Each of the four fixing portions 41 is a recess formed in the inner surface 44 of the baffle 40. More specifically, each of the four fixing portions 41 is a through hole formed in the inner surface 44 of the baffle 40. The locked portion 22 of the holding member 20 is locked to the four fixing portions 41. More specifically, the four locked portions 22 of the holding member 20 shown in FIG. 2 are locked by the four fixing portions 41 each formed of a recess. Thereby, the holding member 20 can be fixed to the baffle 40 with a simplified configuration.

  As shown in FIG. 5, the flange portion 32 of the hood 30 is disposed between the inner surface 44 of the baffle 40 and the holding member 20. Thus, the hood 30 can be fixed to the baffle 40 by the holding member 20 fixed to the baffle 40 and the inner surface 44 of the baffle 40 sandwiching the flange portion 32 of the hood 30.

  The flange portion 32 is held by the holding member 20 in a state of being in contact with a position farther from the lens 60 than the end portion 43 near the lens 60 in the inner surface 44 of the baffle 40. Thus, the hood 30 is fixed to the baffle 40 in a state of being separated from the lens 60. Thereby, since the collar part 32 can be separated from the lens 60, even when the collar part 32 of the hood 30 absorbs the light from the light source 70 and becomes high temperature, the temperature rise of the lens 60 can be suppressed. Therefore, the hood 30 can be used even when the lighting apparatus 10 operates at a high output.

  Further, as shown in FIG. 5, in the present embodiment, the inner surface 44 of the baffle 40 has a stepped shape. Thereby, the mounting portion of the flange portion 32 of the hood 30 on the inner surface 44 of the baffle 40 can be a surface substantially perpendicular to the optical axis J. Accordingly, since the movement of the hood 30 in the optical axis J direction can be reliably controlled, the hood 30 can be stably fixed to the baffle 40.

[3. Summary]
As described above, the lighting fixture 10 according to the present embodiment includes the lamp body 90 and the light source 70 disposed inside the lamp body 90. The luminaire 10 further includes a cylindrical baffle 40 that is disposed inside the lamp body 90 and surrounds the optical axis J of the light source 70, and has an inner diameter that decreases as the light source 70 is approached. The luminaire 10 is further disposed between the baffle 40 and the light source 70, and is fixed to the inner surface of the baffle 40 in a state of being separated from the lens 60, the lens 60 controlling the light distribution from the light source 70, And a cylindrical hood 30 surrounding the optical axis J.

  Thus, when the lighting fixture 10 includes the hood 30, the glare cutoff angle of the lighting fixture 10 can be increased. Further, since the hood 30 is separated from the lens 60, the temperature increase of the lens 60 can be suppressed even when the hood 30 absorbs light from the light source 70 and becomes high temperature.

  In the present embodiment, the hood 30 is fixed at a position farther from the lens 60 than the end 43 of the baffle 40 near the lens 60.

  Thereby, since the hood 30 can be fixed at a position separated from the lens 60, the temperature rise of the lens 60 can be suppressed even when the hood 30 absorbs light from the light source 70 and becomes high temperature.

  Moreover, in the lighting fixture 10, the inner surface of the baffle 40 may have a stepped shape.

  Thereby, the mounting portion of the hood 30 on the inner surface 44 of the baffle 40 can be a surface substantially perpendicular to the optical axis J. Accordingly, since the movement of the hood 30 in the optical axis J direction can be reliably controlled, the hood 30 can be stably fixed to the baffle 40.

  Further, in the lighting apparatus 10, the baffle 40 may have a fixing portion 41 that fixes the hood 30.

  Thereby, the hood 30 can be fixed to the baffle 40.

  In the lighting fixture 10, the fixing portion 41 may be a recess formed on the inner surface 44 of the baffle 40.

  Thereby, the hood 30 can be fixed to the baffle 40 with a simplified configuration.

  In addition, the lighting fixture 10 may include a holding member 20 that is locked to the fixing portion 41 and holds the hood 30.

  Thereby, the structure of the hood 30 can be simplified.

  Moreover, in the lighting fixture 10, the holding member 20 may be a spring.

  Thereby, the holding member 20 which has the simplified structure is realizable.

(Variations, etc.)
As mentioned above, although the lighting fixture which concerns on this invention was demonstrated based on embodiment, this invention is not limited to the said embodiment.

  For example, in the above embodiment, the baffle 40 has the four fixing portions 41, but the number of the fixing portions 41 is not limited to this. For example, the fixing part 41 may be three. In this case, the number of locked portions 22 included in the holding member 20 may be three.

  Further, the holding member 20 according to the above embodiment is not limited to a spring. For example, the holding member can be realized by a member having a claw-like locked portion corresponding to the fixing portion 41 and formed of a resin material or the like.

  Moreover, in the said embodiment, although the fixing | fixed part 41 was a through-hole, what is necessary is just to be concave shape.

  Moreover, in the said embodiment, although the holding member 20 was provided, the holding member 20 does not need to be provided. For example, a claw-like locked portion may be formed on the hood 30 and the locked portion may be locked to the fixing portion 41 of the baffle 40.

  Moreover, in the said embodiment, although the lens 60 was a Fresnel lens, the lens 60 is not limited to this. The lens 60 may be, for example, a hybrid lens or a dome type lens.

  Moreover, in each said embodiment, although the spotlight was shown as an example of a lighting fixture, it is not limited to this. For example, the lighting fixture may be a downlight or the like.

  Moreover, in the said embodiment, although COB type LED was used in the light source 70, you may use another light emitting element. For example, an SMD (Surface Mount Device) type LED may be used. Moreover, you may use other solid light emitting elements, such as an organic EL (Electro Luminescence) element, or other light sources other than a solid light emitting element.

  In addition, the present invention can be realized by various combinations conceived by those skilled in the art for each embodiment, or by arbitrarily combining the components and functions in each embodiment without departing from the spirit of the present invention. This form is also included in the present invention.

DESCRIPTION OF SYMBOLS 10 Lighting fixture 20 Holding member 43 End part 30 Hood 40 Baffle 41 Fixed part 44 Inner surface 60 Lens 70 Light source 90 Lamp main body J Optical axis

Claims (6)

A lamp body,
A light source disposed inside the lamp body;
A cylindrical baffle disposed inside the lamp body and surrounding the optical axis of the light source, the baffle having an inner diameter that decreases as the light source is approached;
A lens that is disposed between the baffle and the light source and controls light distribution of the light from the light source;
A lighting fixture comprising: a cylindrical hood that is fixed to the inner surface of the baffle in a state of being separated from the lens and that surrounds the optical axis. The lighting fixture according to claim 1, wherein an inner surface of the baffle has a stepped shape. The lighting apparatus according to claim 1, wherein the baffle includes a fixing portion that fixes the hood. The lighting fixture according to claim 3, wherein the fixing portion is a recess formed on an inner surface of the baffle. The lighting fixture according to claim 3, further comprising a holding member that is locked to the fixing portion and holds the hood. The lighting fixture according to claim 5, wherein the holding member is a spring.

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