lighting fixtures

Abstract

To provide a lighting fixture capable of easily performing attachment / detachment work of an option.SOLUTION: The lighting fixture is provided with a light source unit 3 in which a casing 4 is arranged so as to cover an outer periphery of an optical axis A of a light source 31, and an option installation part 60 for mounting an option 52 corresponding to the optical axis is installed in the casing 4. The casing 4 is provided with an option entrance 61 corresponding to the option installation part 60, and the option 52 is configured to be attachable to and detachable from the option installation part 60 via the option entrance 61.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a lighting fixture such as a downlight that is attached to a ceiling or the like. [Background technology]

[0002] Conventionally, lighting fixtures such as universal downlights that are recessed into ceilings and can freely adjust the direction of illumination are well known. For example, the lighting fixtures shown in Patent Documents 1 to 3 listed below include a base frame that is attached to an installation hole in the ceiling and a light source unit that is attached to the base frame facing downward. Furthermore, the light source unit is attached to the base frame so that it can rotate freely around an axis (vertical axis) and rotate freely around a horizontal axis (tiltable). An operator can insert their fingers into the base frame from below and rotate the light source unit around the axis or in the tilt direction, thereby freely adjusting the direction of illumination within a predetermined range.

[0003] Such downlights usually have a lens mounted on the optical axis of the light source, such as an LED lamp, in the light source unit, and optical system options such as a spread lens, flat lens, or honeycomb louver may be attached below the lens as needed to improve the visual effect of the illuminated space.

[0004] When attaching or detaching an option to a downlight that can accommodate such options, the downlight's light source unit is removed from the ceiling, wiring connectors, etc. are disconnected as needed, and the light source unit is then partially disassembled on a work surface such as the floor, and the option is attached or detached from the specified option installation section.The disassembled light source unit is then reassembled and attached to the ceiling while connecting the wiring connectors, etc. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2016-91955 [Patent Document 2] Patent Publication No. 2016-66497 [Patent Document 3] Patent Publication No. 2016-126836 Summary of the Invention [Problem to be solved by the invention]

[0006] However, with lighting fixtures such as the above-mentioned conventional universal downlights, when attaching or detaching options, not only is it necessary to remove the light source unit and disassemble and reassemble it on a work surface such as the floor, which is a cumbersome process, but in some cases it is also necessary to disconnect and connect wiring connectors, etc., making it difficult to attach or detach options.

[0007] The present invention has been made in view of the above-mentioned problems, and has as its object to provide a lighting fixture such as a downlight that allows easy attachment and detachment of options. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention comprises the following means.

[0009] [1] A lighting fixture comprising a light source unit in which a casing is arranged so as to cover the outer periphery of the optical axis of a light source, and an option installation section for installing an option in the casing in correspondence with the optical axis, an option entrance / exit is provided in the casing in correspondence with the option installation section; A lighting fixture characterized in that the option is configured to be attachable and detachable to the option installation section through the option entrance.

[0010] [2] The lighting fixture according to paragraph 1, wherein an opening / closing cover is provided at the optional entrance / exit in the casing so as to be freely opened and closed.

[0011] [3] The casing has a circular cross section at the option port, The optional entrance / exit is formed in a slit shape extending along the circumferential direction, The open / close cover is attached to the casing so as to be slidable in the circumferential direction, 3. The lighting fixture according to claim 2, wherein the opening / closing cover is configured to open and close the optional entrance based on the sliding operation.

[0012] [4] The lighting fixture according to the preceding paragraph 3, wherein a finger-hook projection for sliding the opening / closing cover is formed on the outer surface of the opening / closing cover.

[0013] [5] The lighting fixture according to any one of the preceding paragraphs 1 to 4, wherein the light source unit is embedded in the ceiling.

[0014] [6] The light source unit is attached to the ceiling via a base frame, The lighting fixture according to any one of the preceding paragraphs 1 to 5, wherein the light source unit is supported by the base frame so as to be rotatable around an axis parallel to the axis of the lighting fixture and so that the optical axis can be tilted relative to the axis of the lighting fixture. [Effects of the Invention]

[0015] According to the lighting fixture of the present invention [1], an option opening is formed in correspondence with the option installation section in the casing, so that options can be attached and detached to and from the option installation section of the casing through the option opening. In this way, the lighting fixture of the present invention does not require the troublesome work of disassembling part of the fixture to attach and detach options, and the work of attaching and detaching options can be easily performed.

[0016] According to the lighting fixture of invention [2], an opening / closing lid is provided for opening and closing the optional entrance / exit. Therefore, by closing the optional entrance / exit with the opening / closing lid during normal use, such as when the light is on, it is possible to reliably prevent problems such as illumination light leaking out of the optional entrance / exit or small insects or dust particles entering the casing.

[0017] According to the lighting fixture of invention [3], the opening / closing cover is attached so as to be freely slidable along the circumferential direction of the casing, and is configured to be opened and closed by sliding the cover. Therefore, the opening / closing cover is positioned along the circumferential surface of the casing, and the opening / closing cover is less likely to interfere with surrounding parts when opening and closing, and opening and closing operations can be performed smoothly.

[0018] According to the lighting fixture of the invention [4], when sliding the opening / closing cover, the sliding operation can be performed smoothly by hooking a finger on the finger hook protrusion.

[0019] As in inventions [5] and [6], the lighting fixture of the present invention can be suitably used as a downlight or the like. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a side view showing a lighting fixture according to an embodiment of the present invention. [Figure 2] FIG. 2 is an exploded perspective view of the lighting fixture according to the embodiment. [Figure 3] FIG. 3 is a side cross-sectional view of the lighting fixture of the embodiment when attached to a ceiling. [Figure 4] 4 is a side cross-sectional view of the lighting fixture of FIG. 3 in a state where the light source unit is tilted. [Figure 5] FIG. 5 is a perspective view of the lighting fixture of the embodiment with the optional entrance open. [Figure 6] 6 is an enlarged horizontal cross-sectional view showing the periphery of the optional entrance of the lighting fixture of the embodiment, and corresponds to the cross-section VI-VI in FIG. [Figure 7] FIG. 7 is a horizontal cross-sectional view of the lighting fixture of FIG. 6 with the optional entrance open. DETAILED DESCRIPTION OF THE INVENTION

[0021] FIG. 1 is a side view showing a lighting fixture according to an embodiment of the present invention, FIG. 2 is an exploded perspective view, and FIGS. 3 and 4 are side cross-sectional views.

[0022] As shown in these figures, the lighting fixture of this embodiment is a so-called swivel-type universal downlight that is installed in a recessed state in a ceiling 9 or the like and allows the direction of illumination to be freely adjusted.

[0023] The lighting fixture of this embodiment includes a base frame 1, a cone 2, and a light source unit 3 as basic components.

[0024] The base frame 1 has a flanged annular shape with a flange 11 formed on the outer peripheral edge of the lower end thereof, which protrudes outward.

[0025] The cone 2 disposed inside the base frame 1 is formed in a truncated cone shape with a diameter that increases downward. The cone 2 is detachably supported by the base frame 1 via a spring and is rotatable about the axis X of the base frame 1. In this embodiment, the axis X of the base frame 1 coincides with the axis of the lighting fixture (downlight).

[0026] Additionally, a plurality of mounting springs 12 made of leaf springs are attached at appropriate intervals in the circumferential direction to the outer peripheral surface of the base frame 1. Each mounting spring 12 is arranged so that it is pulled outward from above the base frame 1 and protrudes in the outer diameter direction.

[0027] As shown in Figure 3, each mounting spring 12 is elastically deformed so as to fold upward and then fitted into the installation hole 91 in the ceiling 9 from below, so that the base frame 1 is attached in a state where it is embedded in the installation hole 91 in the ceiling 9 via the root portion of the mounting spring 12.

[0028] The cone 2 supported by the base frame 1 is provided with a pair of mounting pieces 21 that protrude upward and rotatably support a light source unit 3, which will be described in detail below.

[0029] The light source unit 3 has a light source 31. The light source 31 is configured by an LED (Light Emitting Diode) or the like, and is configured to irradiate illumination light (LED light) forward (downward) from the light source 31. Here, in this embodiment, the axis of the light source unit 3 coincides with the optical axis A of the light source 31.

[0030] The light source unit 3 is provided with a casing 4 that surrounds the outer periphery of the optical axis A of the light source 31. The casing 4 includes a cylindrical casing main body 5, a cylindrical (circular cross section) casing intermediate section 6 that is provided at the lower end of the casing main body 5 and has a smaller diameter than the casing main body 5, and a cylindrical (frusto-conical) casing tip section 7 that is provided at the lower end of the casing intermediate section 6 and has a diameter that increases downward.

[0031] A heat sink 35 is attached to the upper opening of the casing body 5, and the light source 31 is attached inside the casing body 5 at the lower end of the heat sink 35.

[0032] An umbrella-shaped reflector 51 is provided inside the casing main body 5. The upper opening edge of this reflector 51 is arranged on the outer peripheral edge of the light source 31, and the lower opening edge is arranged on the lower opening edge of the casing main body 5.

[0033] Furthermore, a lens 52 is arranged at the lower end of the reflector 51 in correspondence with the optical axis A, and the LED light emitted from the light source 31 is configured to pass through the lens 52.

[0034] The interior of the casing intermediate section 6 is configured as an option installation section 60. Examples of optical system options 53 (see FIG. 5) installed in this option installation section 60 include a spread lens, a flat lens, a honeycomb louver, etc.

[0035] In this embodiment, the option 53 may be any one that is arranged on the optical axis A.

[0036] FIG. 5 is a perspective view of the lighting fixture of the embodiment with the optional entrance open, and FIGS. 6 and 7 are horizontal cross-sectional views corresponding to the cross section taken along the line VI-VI in FIG.

[0037] 5 to 7, a slit-shaped optional access port 61 is formed in the circumferential direction over approximately half the circumference of the peripheral wall of the casing intermediate section 6. This optional access port 61 is a through-hole, and communicates between the optional installation section 60 and the outside of the casing 4.

[0038] Furthermore, an opening / closing lid 62 is provided at the option port 61. This opening / closing lid 62 is formed in an arc shape slightly longer than a semicircle so that it can completely cover the outside of the option port 61, and is attached to the outer surface of the casing intermediate section 6 at a position corresponding to the option port 61 so that it can slide freely along the circumferential direction. When the opening / closing lid 62 is positioned corresponding to the option port 61 by sliding it, as shown in FIGS. 5 and 6, the option port 61 is closed by the opening / closing lid 62. However, when the opening / closing lid 62 is retracted from the option port 61 and positioned along the outer peripheral wall opposite the option port 61 as shown in FIG. 7, the option port 61 is opened. Furthermore, when this option port 61 is open, the option 53 can be inserted into or removed from the option installation section 60 within the casing intermediate section 6 through the option port 61.

[0039] In this embodiment, a finger hook ridge 63 is formed on the outer peripheral surface of the circumferentially intermediate portion of the opening / closing cover 62 to provide a comfortable grip for the fingers, and the operator can smoothly slide the opening / closing cover 62 by hooking their fingers on this finger hook ridge 63. Furthermore, an anti-slip portion 64 made of minute irregularities such as knurling is formed on the outer surface of the finger hook ridge 63 to prevent the fingers from slipping when sliding the opening / closing cover 62.

[0040] 6 and 7, positioning recesses 66 are formed on the inside of both ends of the opening / closing cover 62, and positioning protrusions 65 are formed near both ends of the optional access port 61 on the outer peripheral surface of the casing intermediate section 6, corresponding to the positioning recesses 66. As a result, when the opening / closing cover 62 is closed, as shown in FIG. 6, the positioning protrusions 65 are accommodated in an engaged state within the positioning recesses 66, thereby maintaining the opening / closing cover 62 in a state in which the optional access port 61 is closed. Also, as shown in FIG. 7, by sliding the opening / closing cover 62 from the closed state with an appropriate operating force, the engagement between the positioning recesses 66 and the positioning protrusions 65 is released, allowing the optional access port 61 to be opened. Therefore, in this embodiment, when the opening / closing cover 62 is closed, the opening / closing cover 62 is prevented from unintentionally sliding and accidentally opening the optional access port 61.

[0041] 3 and 4, a baffle 40 is provided on the lower inner peripheral surface of the casing intermediate section 6 of the light source unit 3. This baffle 40 is a so-called vertical baffle, and is configured with knurling in which a large number of concave and convex portions extending parallel to the optical axis A are arranged in the circumferential direction.

[0042] 1 and 2, a pair of pivotal attachment portions 71 are provided on the outer peripheral surface of the casing tip portion 7 of the light source unit 3, and a pair of mounting pieces 21 of the cone 2 attached to the base frame 1 are pivotally attached to the pair of pivotal attachment portions 71. This allows the light source unit 3 to rotate freely around a horizontal rotation axis B (see FIG. 5, etc.) that passes through the pair of pivotal attachment portions 71. In other words, the light source unit 3 is configured so that its optical axis A can rotate (tilt) freely in a bending direction relative to a vertical axis that is parallel to the axis X of the base frame 1 (axis center of the lighting fixture).

[0043] In this embodiment, the vertical axis parallel to the axis X of the base frame 1 corresponds to the optical axis A in the state (initial state) in which the light source unit 3 is vertically disposed as shown in Fig. 3. Therefore, the light source unit 3 is configured so that it can be disposed in a state in which the axis A is tilted as shown in Fig. 4 with respect to the axis A in the initial state shown in Fig. 3.

[0044] As described above, the cone 2 to which the light source unit 3 is pivotally attached is detachably attached to the base frame 1. Therefore, the light source unit 3 can be removed from the ceiling 9 together with the cone 2, with the base frame 1 remaining. Furthermore, the cone 2 is configured to be rotatable relative to the base frame 1 around the axis X in the vertical direction of the base frame 1. Therefore, in this embodiment, the light source unit 3 is configured to be rotatable around the axis of the base frame 1 and tiltable relative to the vertical axis parallel to the axis of the base frame 1.

[0045] In this embodiment, the optical axis A of the light source unit 3 in the initial state does not coincide with the axis X of the base frame 1 (axis X of the lighting fixture), but is disposed at a horizontal distance from the axis X of the base frame 1. However, in the present invention, the optical axis A of the light source unit 3 in the initial state may be configured to coincide with the axis X of the base frame 1.

[0046] Furthermore, in the lighting fixture of this embodiment, the light source unit 3 is configured to be able to be fixed at any rotational position and at any tilted position.

[0047] Therefore, in the lighting fixture of this embodiment, the light source unit 3 can be held at a desired rotational position and tilted position so that the lighting direction is directed in a desired direction. As a result, the lighting fixture of this embodiment can appropriately adjust the lighting direction according to the room layout and indoor fixtures, and can produce excellent lighting effects.

[0048] In the lighting fixture of this embodiment, when changing the rotational position or tilting position of the light source unit 3, the worker inserts his or her finger into the cone 2 to adjust the rotational position, tilting position, etc. of the light source unit 3. However, to prevent the position of the light source unit 3 from being changed unnecessarily, there is strong resistance to the rotational and tilting movements, and the position of the light source unit 3 is maintained by a relatively strong force (frictional resistance force, etc.).

[0049] According to the lighting fixture of the present embodiment having the above configuration, an option installation section 60 is provided inside the casing 4 of the light source unit 3, an option entrance 61 is formed in the casing 4 corresponding to the option installation section 60, and an open / close lid 62 is attached to the option entrance 61 so that it can be opened and closed freely. Therefore, when installing or removing an option 52 in a lighting fixture installed on the ceiling 9, the light source unit 3 is removed from the ceiling 9 (base frame 1) together with the cone 2 and separated downward (hanging), and the open / close lid 62 of the light source unit 3 is slid to open the option entrance 61. Then, after installing or removing the option 52 in the option installation section 60 in the casing 4 through the opened option entrance 61, the option entrance 61 can be closed with the open / close lid 62, and the light source unit 3 can be attached to the ceiling 9. Thus, with the lighting fixture of this embodiment, when attaching or detaching the option 52, there is no need for troublesome work such as disassembling the light source unit 3 or disconnecting wiring connectors, etc., and the option 52 can be easily attached or detached by simply opening the option entrance / exit 61, making the operation of attaching or detaching the option 52 easy.

[0050] Furthermore, in the lighting fixture of this embodiment, the opening / closing lid 62 is attached so as to be freely slidable along the circumferential direction of the casing 4, and when opening and closing, the opening / closing lid 62 slides along the circumferential surface of the casing 4. Therefore, when opening and closing, the opening / closing lid 62 is less likely to interfere with surrounding parts, and opening and closing operations can be performed smoothly.

[0051] Furthermore, in the lighting fixture of this embodiment, the finger hook protrusion 63 is provided on the outer surface of the opening / closing cover 62, so that the worker can hook his / her finger on the finger hook protrusion 63 when opening or closing the opening / closing cover 62 to smoothly perform the opening / closing operation, making it even easier to open and close the opening / closing cover 62 and, in turn, to attach and remove the option 52. Furthermore, the anti-slip portion 64 is formed on the outer surface of the finger hook protrusion 63, so that it is possible to prevent fingers from slipping when opening or closing the opening / closing cover 62, making the opening and closing operation of the opening / closing cover 62 even smoother.

[0052] In addition, in the lighting fixture of this embodiment, during normal use such as when the light is on, the optional entrance 61 of the casing 4 is closed by the opening / closing cover 62, which reliably prevents problems such as illumination light leaking out from the optional entrance 61 and ensures the desired lighting effect. Furthermore, because the optional entrance 61 is closed during normal use, it is also possible to prevent problems such as small insects, dust, and other foreign objects from entering the casing 4 through the optional entrance 61.

[0053] Furthermore, a positioning recess 66 is formed in the opening / closing lid 62, and a positioning protrusion 65 corresponding to the positioning recess 66 is formed on the outer surface of the casing. Therefore, when the opening / closing lid 62 is closed, the positioning protrusion 65 and the positioning recess 66 engage with each other, thereby preventing the opening / closing lid 62 from accidentally sliding and the optional entrance / exit 61 from being opened unexpectedly.

[0054] In the above embodiment, the present invention has been described as being applied to a swing-type universal downlight, but the present invention is not limited to this and can also be applied to downlights whose lighting direction cannot be changed, spotlights, etc. The present invention can be applied to any lighting fixture as long as options can be attached and detached as needed. [Industrial Applicability]

[0055] The lighting fixture of the present invention can be suitably used as a downlight or the like to which an optional optical system can be attached or detached. [Explanation of symbols]

[0056] 1: Base frame 3: Light source unit 31:Light source 4: Casing 52: Option 60: Optional installation section 61: Optional entrance / exit 62: Opening and closing lid 63: Finger hook protrusion 9: Ceiling A: Optical axis X: Center of the base frame (center of the lighting fixture)

Claims

1. A lighting fixture comprising a light source unit in which a casing is disposed so as to cover an outer periphery of an optical axis of a light source, and an option installation section for installing an option in the casing in correspondence with the optical axis, an option entrance / exit is provided in the casing in correspondence with the option installation section; The option can be attached to and detached from the option installation unit through the option entrance, an opening / closing cover is provided at the option port in the casing so as to be able to be opened and closed; The casing has a circular cross section at the option port, The optional entrance / exit is formed in a slit shape extending along the circumferential direction, The open / close cover is attached to the casing so as to be slidable in the circumferential direction, The lighting fixture is configured so that the opening / closing cover opens and closes the optional entrance based on the sliding operation.

2. 2. The lighting fixture according to claim 1, wherein a finger-hook projection for sliding the cover is formed on an outer surface of the cover.

3. 3. The lighting fixture according to claim 1, wherein the light source unit is embedded in a ceiling.

4. the light source unit is attached to a ceiling via a base frame, 3. The lighting fixture according to claim 1, wherein the light source unit is supported by the base frame so as to be rotatable about an axis parallel to the axis of the lighting fixture and so that the optical axis of the light source unit is tiltable relative to the axis of the lighting fixture.

5. the light source unit is attached to a ceiling via a base frame, 4. The lighting fixture according to claim 3, wherein the light source unit is supported by the base frame so as to be rotatable about an axis parallel to the axis of the lighting fixture and so that the optical axis thereof can be tilted relative to the axis of the lighting fixture.

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