JP6924963B2 - lighting equipment - Google Patents

Description

The present invention relates to a luminaire having a tubular hood.

In a conventional lamp, for example, a lamp for a spotlight, a lamp body having an opening for emitting light, a light source installed inside the lamp body, and a reflection that controls the distribution of light emitted from the light source. It includes a member and a lens (see, for example, Patent Document 1).

In the luminaire disclosed in Patent Document 1, the glare cut-off angle is further increased by attaching a tubular hood to the shade portion of the main body of the lamp.

JP-A-2017-84729

In the luminaire disclosed in Patent Document 1, the hood is inserted up to the position of the lens inside the lamp body in order to stably fix the elastically deformable hood to the lamp body. Here, when the light from the light source is applied to the lens side end portion of the hood, the temperature of the lens side end portion rises. Further, since the lens is generally made of acrylic or the like having a relatively low heat resistance performance, the temperature of the lens may rise to a temperature higher than the heat resistance temperature as the temperature of the lens side end portion of the hood rises. Therefore, the hood disclosed in Patent Document 1 cannot be used, especially when the output of the luminaire is high.

Therefore, the present invention provides a luminaire provided with a hood, which can suppress a temperature rise of a lens arranged inside the main body of the luminaire.

In order to solve the above problems, one aspect of the lighting fixture according to the present invention is a lamp body, a light source arranged inside the lamp body, and an optical axis of the light source arranged inside the lamp body. A surrounding tubular baffle whose inner diameter decreases as it approaches the light source, a lens which is arranged between the baffle and the light source and controls the light distribution of light from the light source, and the lens. It is provided with a tubular hood that is fixed to the inner surface of the baffle in a state of being separated from the light axis and surrounds the optical axis.

According to the present invention, it is possible to provide a luminaire capable of suppressing a temperature rise of a lens arranged inside a lamp body.

FIG. 1 is a perspective view showing the appearance of the lighting fixture according to the embodiment. FIG. 2 is a partially exploded perspective view of the lighting fixture 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 fixture according to the embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that all of the embodiments described below show a specific example of the present invention. Therefore, the numerical values, shapes, materials, components, arrangement positions of the components, connection forms, and the like shown in the following embodiments are examples and are not intended to limit the present invention. Therefore, among the components in the following embodiments, the components not described in the independent claims indicating the highest level concept of the present invention will be described as arbitrary components.

It should be noted that each figure is a schematic view and is not necessarily exactly illustrated. Further, in each figure, the same reference numerals are given to substantially the same configurations, and duplicate description will be omitted or simplified.

(Embodiment)
[1. composition]
The configuration of the lighting fixture according to the first embodiment will be described with reference to the drawings.

FIG. 1 is a perspective view showing the appearance of the 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, among the lighting fixtures 10, 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. 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 of the light source 70 of the luminaire 10 passing through the optical axis J. FIG. 5 is a partially enlarged cross-sectional view of the lighting fixture 10 according to the present embodiment. In FIG. 5, the inside of the broken line frame V shown in FIG. 4 is enlarged and shown.

As shown in FIGS. 1 and 2, the luminaire 10 is a spotlight and includes a holding member 20, a hood 30, a lamp main body 90, an arm 97, and a power supply box 98. Further, as shown in FIGS. 2 and 4, the luminaire 10 further includes a baffle 40, a regulating member 50, a lens 60, and a light source 70. Further, as shown in FIG. 4, the luminaire 10 further includes a lens holding member 80 and a base 92. Hereinafter, each component of the lighting fixture 10 will be described. In the present embodiment, the light emitting 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 tubular member in which a light source 70 is arranged inside 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-shaped opening provided on the side surface of the lamp main body 90, and the arm 97 is arranged.

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 arranged inside the lamp main body 90.

The lamp body 90 is made of a metal material such as aluminum. 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 arranged inside the lamp main 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 dissipates heat generated from the light source 70. The base 92 is fixed to the lamp body 90 using screws (not shown) or the like.

The base 92 has a light-shielding portion 95 erected toward the front side around the light source 70. The light-shielding unit 95 blocks light emitted from the light source 70 in a direction close to perpendicular to the optical axis J. As a result, it is possible to prevent the light emitted from the light source 70 from leaking from the side opening 91 arranged on the rear side of the light source 70.

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

[1-3. light source]
As shown in FIGS. 2 and 4, the light source 70 is a light emitting unit that is arranged inside the lamp main body 90 and emits light along the optical axis J. In the present embodiment, the light source 70 is a light emitting module having an LED (Light Emitting Diode), and is an LED light source that emits a predetermined light radially. The light source 70 is configured to emit, for example, white light. The light source 70 is composed of a COB (Chip On Board) type LED, and as shown in FIGS. 2 and 4, the light source 70 includes a substrate 72, a plurality of LEDs 71 which are bare chips (LED chips) mounted on the substrate 72, and a plurality of LEDs 71. The LEDs 71 are sealed, and a sealing member containing 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. A plurality of line-shaped sealing members may be formed along the arrangement direction of the LEDs 71 arranged in a line shape.

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

The substrate 72 is a mounting substrate for mounting a plurality of LEDs 71, and is, for example, a ceramic substrate, a resin substrate, an insulation-coated metal base substrate, or the like. Further, the substrate 72 has, for example, a plate shape having a flat surface that is rectangular in a plan view, and the bottom surface (that is, the rear surface) of the substrate 72 is attached to and fixed to the base 92. Although not shown, the substrate 72 has a pair of electrode terminals (positive electrode terminal and 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. It is formed.

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

As shown in FIGS. 2 and 4, the lens 60 is arranged in front of the light source 70. Specifically, the lens 60 is arranged on the light emitting side of the light source 70 at 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, for example, the light emitted from the light source 70. It is preferable that the optical axis of the lens 60 substantially coincides 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. Further, the lens 60 is formed by using a translucent material. Specifically, the lens 60 is formed 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 glass material. The lens 60 is held by the lens holding member 80 in the lamp body 90.

[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 tubular shape having an opening through which the optical axis J penetrates. 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 main body 90. As a result, the positions of the lens holding member 80 and the lens 60 in the lamp body 90 are restricted.

The lens holding member 80 holds the lens 60 at the end 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. As described above, when the lens holding member 80 made 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 made of metal holds the lens 60. ..

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

[1-6. Regulatory members]
The regulating member 50 is a member that is arranged inside the lamp main body 90 and regulates the position of the lens holding member 80. In the present embodiment, the regulating member 50 is a spring attached to the inside of the lamp main body 90. As shown in FIG. 2, the regulating member 50 has a C-shape and has three regulating portions 51. As shown in FIG. 5, the regulating member 50 is arranged in the annular regulating groove 94 formed on the inner surface of the lamp main body 90. The three regulating portions 51 project from the inner surface of the lamp main body 90 toward the optical axis J and come into contact with the end portions of the lens holding member 80. As a result, the regulating member 50 restricts the lens holding member 80 from moving toward the front side.

The regulation member 50 is formed by using 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 tubular shade portion of the lamp body 90. The baffle 40 is a tubular member arranged inside the lamp main body 90 and surrounding the optical axis J. Specifically, the baffle 40 is arranged inside the shade portion of the lamp main 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 arranged inside the lamp body 90 and on the front side of the lens 60.

As shown in FIG. 4, the baffle 40 is arranged near the front end portion of the lamp body 90. The inner surface 44 (the surface on the optical axis J side) of the baffle 40 shown in FIGS. 3 and 5 is a glare suppressing surface. As a result, glare on 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 a surface painted in black. Further, the black glare suppressing surface can also be realized by applying a graining process to a surface painted in black or a surface made of a black member.

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

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

In this embodiment, the hood 30 is fixed to the baffle 40. As shown in FIG. 3, the baffle 40 has a fixing portion 41 for fixing 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 tubular member that is fixed to the inner surface 44 of the baffle 40 in a state of being separated from the lens 60 and surrounds the optical axis J.

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

The inner surface of the tubular portion 31 is a glare suppressing surface. The luminaire 10 can increase the glare cut-off angle by providing the hood 30 having such a glare suppressing surface. The configuration of the outer surface of the tubular portion 31 is not particularly limited, but for example, the outer surface of the tubular portion 31 and the outer surface of the lamp main body 90 may be similarly painted. As a result, the hood 30 becomes inconspicuous in the appearance of the luminaire 10, so that the appearance quality of the luminaire 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 by using a metal material, a resin material, or the like. In this embodiment, the hood 30 is made of sheet metal using aluminum.

The fixed 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 arranged inside the baffle 40 and holds the hood 30. In this 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 having a simplified structure can be realized. 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 project in a direction away from the optical axis J. Each of the four locked portions 22 is locked to the four fixing portions 41 of the baffle 40. As a result, the holding member 20 is fixed to the baffle 40. The holding member 20 fixed to the baffle 40 and the inner surface 44 of the baffle 40 can fix the hood 30 to the baffle 40 by sandwiching the collar portion 32 of the hood 30.

Further, 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 portion 21 is bent toward the front side. This allows the user to easily pick the end 21.

The holding member 20 is formed by using a linear metal member such as stainless steel.

The method of attaching and detaching the holding member 20 to 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) connecting the power supply box 98 and the light source 70 is arranged in the insertion hole.

The arm 97 is made 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]
The power supply box 98 shown in FIGS. 1 and 2 is a housing having a built-in power supply circuit for supplying electric power to the light source 70. In the present embodiment, the power supply circuit built in the power supply box 98 converts the AC power supplied from the outside of the power supply box 98 into DC power, and transfers the DC power 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 of a metal material, a resin material, or the like. In the present embodiment, for example, the outer wall portion is made of aluminum.

[2. Fixed hood configuration]
The 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 luminaire 10 includes a holding member 20 that is locked to the fixing portion 41 of the baffle 40 and holds the hood 30. As a result, the hood 30 itself does not need to have a holding structure, so that the configuration of the 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 for fixing the hood 30. In this embodiment, the hood 30 has four fixing portions 41. Each of the four fixing portions 41 is a recess formed on 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 respectively locked to the four fixing portions 41 formed of recesses. Thereby, the holding member 20 can be fixed to the baffle 40 in a simplified configuration.

As shown in FIG. 5, the collar portion 32 of the hood 30 is arranged between the inner surface 44 of the baffle 40 and the holding member 20. In this way, the holding member 20 fixed to the baffle 40 and the inner surface 44 of the baffle 40 can fix the hood 30 to the baffle 40 by sandwiching the collar portion 32 of the hood 30.

The collar portion 32 is held by the holding member 20 in a state of being in contact with the inner surface 44 of the baffle 40 at a position farther from the lens 60 than the end portion 43 closer to the lens 60. In this way, the hood 30 is fixed to the baffle 40 in a state of being separated from the lens 60. As a result, the collar portion 32 can be separated from the lens 60, so that even when the collar portion 32 of the hood 30 absorbs the light from the light source 70 and becomes high in temperature, the temperature rise of the lens 60 can be suppressed. Therefore, the hood 30 can be used even when the lighting fixture 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. As a result, the mounting portion of the flange portion 32 of the hood 30 on the inner surface 44 of the baffle 40 can be made a plane substantially perpendicular to the optical axis J. Therefore, since the movement of the hood 30 in the optical axis J direction can be reliably regulated, 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 a lamp main body 90 and a light source 70 arranged inside the lamp main body 90. The luminaire 10 is further provided with a tubular baffle 40 that is arranged inside the lamp body 90 and surrounds the optical axis J of the light source 70, and whose inner diameter decreases as it approaches the light source 70. The luminaire 10 is further arranged 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 that controls the light distribution of the light from the light source 70 and the lens 60. A tubular hood 30 that surrounds the optical axis J is provided.

In this way, when the luminaire 10 is provided with the hood 30, the glare cut-off angle of the luminaire 10 can be increased. Further, since the hood 30 is separated from the lens 60, the temperature rise of the lens 60 can be suppressed even when the hood 30 absorbs the light from the light source 70 and becomes high in 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.

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

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

As a result, 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. Therefore, since the movement of the hood 30 in the optical axis J direction can be reliably regulated, the hood 30 can be stably fixed to the baffle 40.

Further, in the luminaire 10, the baffle 40 may have a fixing portion 41 for fixing the hood 30.

As a result, the hood 30 can be fixed to the baffle 40.

Further, in the luminaire 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 in a simplified configuration.

Further, the luminaire 10 may include a holding member 20 that is locked to the fixing portion 41 and holds the hood 30.

This makes it possible to simplify the configuration of the hood 30.

Further, in the luminaire 10, the holding member 20 may be a spring.

Thereby, the holding member 20 having a simplified structure can be realized.

(Modification example, etc.)
The lighting fixture according to the present invention has been described above based on the embodiment, but the present invention is not limited to the above embodiment.

For example, in the above embodiment, the baffle 40 has four fixing portions 41, but the number of fixing portions 41 is not limited to this. For example, the number of fixed portions 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 the spring. For example, the holding member can be realized by having a claw-shaped locked portion corresponding to the fixing portion 41 and a member formed of a resin material or the like.

Further, in the above embodiment, the fixing portion 41 is a through hole, but it may be concave.

Further, in the above embodiment, the holding member 20 is provided, but the holding member 20 may not be provided. For example, a claw-shaped 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.

Further, in the above embodiment, the lens 60 is a Fresnel lens, but the lens 60 is not limited to this. The lens 60 may be, for example, a hybrid lens, a dome-shaped lens, or the like.

Further, in each of the above embodiments, a spotlight is shown as an example of a lighting fixture, but the present invention is not limited to this. For example, the luminaire may be a downlight or the like.

Further, in the above embodiment, the COB type LED is used in the light source 70, but other light emitting elements may be used. For example, an SMD (Surface Mount Device) type LED may be used. Further, another solid-state light emitting element such as an organic EL (Electroluminescence) element or a light source other than the solid-state light emitting element may be used.

In addition, it is realized by applying various modifications to each embodiment that can be conceived by those skilled in the art, or by arbitrarily combining the components and functions of each embodiment within the range not deviating from the gist of the present invention. Also included in the present invention.

10 Lighting equipment 20 Holding member 43 End part 30 Hood 40 Baffle 41 Fixed part 44 Inner surface 60 Lens 70 Light source 90 Lighting equipment body J Optical axis

Claims (6)

The main body of the lamp and
A light source arranged inside the lamp body and
A tubular baffle that is arranged inside the lamp body and surrounds the optical axis of the light source, and whose inner diameter decreases as it approaches the light source.
A lens arranged between the baffle and the light source and controlling the distribution of light from the light source,
It is provided with a tubular hood that is fixed to the inner surface of the baffle in a state of being separated from the lens and surrounds the optical axis.
The hood is a luminaire arranged only between the inner surface of the baffle and the optical axis of the light source. The lighting fixture according to claim 1, wherein the inner surface of the baffle has a stepped shape. The luminaire according to claim 1 or 2, wherein the baffle has a fixing portion for fixing the hood. The luminaire according to claim 3, wherein the fixing portion is a recess formed on the inner surface of the baffle. The luminaire according to claim 3 or 4, 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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