Lighting fixtures

Abstract

Suppresses glare. [Solution] The lighting fixture comprises a light source 10, a first optical element 31, and a second optical element 32. The light source 10 emits light. The first optical element 31 and the second optical element 32 are arranged along the optical axis of the light source 10 and refract the light emitted from the light source 10 in a predetermined direction. The first optical element 31 and the second optical element 32 are arranged in the order of second optical element 32, then first optical element 31, from the light source 10 side in the optical axis direction. The first optical element 31 is inclined with respect to the optical axis direction and has a rotation axis (first rotation axis Ax1) which serves as the center of rotation when the first optical element 31 is rotated.

Description

Technical Field

[0001] This disclosure relates to lighting fixtures. More specifically, this disclosure relates to lighting fixtures including a plurality of optical elements.

Background Art

[0002] Patent Document 1 describes a lighting fixture including a planar light source, a first prism panel and a second prism panel, a first support frame and a second support frame, and an appliance body.

[0003] The planar light source has a light emitting surface that emits light. Each of the first prism panel and the second prism panel is provided below the planar light source and has a light emitting surface that changes the irradiation direction of the light irradiated from the planar light source. The first support frame supports the first prism panel so as to cover the entire circumference thereof. The second support frame supports the second prism panel so as to cover the entire circumference thereof. The appliance body is formed in a bottomed cylindrical shape with an open lower surface and houses the planar light source, the first prism panel, the second prism panel, the first support frame, and the second support frame.

[0004] In the lighting fixture described in Patent Document 1, the first prism panel is rotatable by manually rotating the first support frame, and the second prism panel is rotatable by manually rotating the second support frame.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In the lighting fixture described in Patent Document 1, glare may increase depending on the positions of the first prism panel and the second prism panel.

[0007] The purpose of this disclosure is to provide a lighting fixture capable of suppressing glare. [Means for solving the problem]

[0008] An illuminating fixture according to one aspect of the present disclosure comprises a light source, a first optical element and a second optical element. The light source emits light. The first optical element and the second optical element are arranged along the optical axis of the light source and refract the light emitted from the light source in a predetermined direction. The first optical element and the second optical element are arranged in the order of the second optical element and the first optical element from the light source side in the optical axis. The first optical element is inclined with respect to the optical axis and has a rotation axis that serves as the center of rotation when the first optical element is rotated. [Effects of the Invention]

[0009] According to one aspect of this disclosure, a lighting fixture makes it possible to suppress glare. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 is an exploded perspective view of a lighting fixture according to an embodiment. [Figure 2] Figure 2 is an exploded perspective view of the lighting device included in the same lighting fixture. [Figure 3] Figure 3 is a cross-sectional view of the same lighting fixture. [Figure 4] Figure 4 is a partial cross-sectional view of the first optical element provided in the same lighting fixture. [Figure 5] Figure 5 is a block diagram of the same lighting fixture. [Figure 6] Figure 6 is a side view of the pair of optical elements and the first rotary control unit of the same lighting fixture. [Figure 7] Figure 7 is a cross-sectional view showing an example of the arrangement of a pair of optical elements in the same lighting fixture. [Figure 8] Figure 8 is a cross-sectional view showing another example of the arrangement of the pair of optical elements in the same lighting fixture. [Figure 9] FIG. 9 is a cross-sectional view showing an arrangement example of a pair of optical elements included in the lighting fixture according to Modification 2 of the embodiment. [Figure 10] FIG. 10 is a cross-sectional view showing an arrangement example of a pair of optical elements included in the lighting fixture according to Modification 3 of the embodiment. [Figure 11] FIG. 11 is a cross-sectional view of a pair of optical elements included in the lighting fixture according to Modification 4 of the embodiment. [Figure 12] FIG. 12 is a cross-sectional view showing a processing example of an optical element included in the lighting fixture according to Modification 5 of the embodiment. [Figure 13] FIG. 13 is a cross-sectional view showing a processing example of an optical element included in the lighting fixture according to Modification 6 of the embodiment. [Figure 14] FIG. 14 is a cross-sectional view showing a processing example of an optical element included in the lighting fixture according to Modification 7 of the embodiment. [Figure 15] FIG. 15 is a cross-sectional view showing an arrangement example of a pair of optical elements included in the lighting fixture according to Modification 8 of the embodiment. [Figure 16] FIG. 16 is a block diagram of the lighting fixture according to Modification 9 of the embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION

[0011] Hereinafter, the lighting fixture according to the embodiment will be described with reference to the drawings. The drawings referred to in the following embodiments and the like are schematic drawings, and the sizes and thicknesses of the components in the drawings do not necessarily reflect the actual dimensions, and the ratios of the sizes and thicknesses between the components also do not necessarily reflect the actual dimensional ratios.

[0012] (Embodiment) (1) Overview First, the overview of the lighting fixture 1 according to the embodiment will be described with reference to FIGS. 1 to 3.

[0013] The lighting fixture 1 according to the embodiment is, for example, a spotlight that is embedded and disposed on the ceiling of a facility to illuminate the inside of the facility. The facility is, for example, a residential facility such as each dwelling of a detached house or an apartment house, or a non-residential facility such as an office, a store, a school, or a nursing facility. In this embodiment, as an example, the facility is each dwelling or each room of an apartment house.

[0014] The lighting fixture 1 according to the embodiment includes a light source 10, a first optical element 31, and a second optical element 32. The light source 10 emits light. The first optical element 31 and the second optical element 32 are arranged side by side along the optical axis direction, and refract the light emitted from the light source 10 in a predetermined direction. The first optical element 31 and the second optical element 32 are arranged in the order of the second optical element 32 and the first optical element 31 from the light source 10 side in the optical axis direction. The first optical element 31 is inclined with respect to the optical axis direction and has a first rotation axis Ax1 (rotation axis) that serves as a rotation center when the first optical element 31 is rotated. The optical axis direction is the direction along the optical axis Ax0 (see FIG. 7) of the light source 10. In this embodiment, as an example, the optical axis direction is the direction along the vertical direction.

[0015] In the lighting fixture 1 according to the embodiment, the first rotation axis Ax1 of the first optical element 31 is inclined with respect to the optical axis direction of the light source 10. As a result, it becomes possible to irradiate the light emitted from the light source 10 in a direction different from the optical axis direction, and as a result, it becomes possible to suppress glare.

[0016] (2) Details Next, each component of the lighting fixture 1 according to the embodiment will be described with reference to FIGS. 1 to 8. In the following description, unless otherwise specified, the vertical direction is defined in the orientation shown in FIG. 1. However, these directions are not intended to limit the direction of use of the lighting fixture 1. Also, the arrows indicating "up" and "down" in each figure are only shown for the purpose of explanation and do not have any physical entity.

[0017] As shown in Figure 1, the lighting fixture 1 according to this embodiment comprises a cover body 50a and a lighting device 80. As described above, the lighting fixture 1 is a downlight that is embedded in the ceiling of a facility. Specifically, the lighting fixture 1 is a universal downlight that can change the direction and angle of the light emitted from the light source 10.

[0018] (2.1) Lighting devices As shown in Figure 5, the lighting device 80 includes a light source 10, a focusing lens 20, a pair of optical elements 30, and an operating unit 40.

[0019] (2.1.1) Light source The light source 10 emits light. More specifically, the light source 10 converts power supplied from an external power source into light and emits it. The light source 10 has, for example, multiple light-emitting elements. Each of the multiple light-emitting elements is, for example, an LED (Light Emitting Diode). The color (color temperature) of the light emitted from the multiple light-emitting elements may be the same or different.

[0020] Furthermore, each of the multiple light-emitting elements is not limited to LEDs; for example, it could be an organic EL (Electro-Luminescence) element or a laser diode.

[0021] (2.1.2) Focusing lens The focusing lens 20 is made of, for example, a light-transmitting material, such as acrylic, silicone resin, or polycarbonate, or glass. The focusing lens 20 is positioned between the pair of optical elements 30 and the light source 10 in the optical axis direction, which is along the optical axis Ax0 (see Figure 7) of the light source 10. More specifically, the focusing lens 20 is positioned between the second optical element 32 and the light source 10 in the optical axis direction. In this embodiment, the optical axis Ax0 of the light source 10 and the central axis of the focusing lens 20 coincide. The focusing lens 20 is, for example, a Fresnel lens. When light from the light source 10 is incident on the focusing lens 20, it directs a portion of the incident light toward the pair of optical elements 30.

[0022] (2.1.3) Optical elements The pair of optical elements 30 includes a first optical element 31 and a second optical element 32. Each of the first optical element 31 and the second optical element 32 is made of a light-transmitting material, for example, a transparent resin material such as acrylic, silicone resin material, or polycarbonate, or a glass material. The first optical element 31 and the second optical element 32 are arranged along the optical axis. More specifically, the first optical element 31 and the second optical element 32 are arranged in the optical axis direction from the light source 10 side in the order of second optical element 32, then first optical element 31. Each of the first optical element 31 and the second optical element 32 has a refractive effect that refracts light emitted from the light source 10 in a predetermined direction.

[0023] The first optical element 31 and the second optical element 32 are formed in the same shape. As a result, the refraction angle of the first optical element 31 and the refraction angle of the second optical element 32 are the same. More specifically, as shown in Figure 2, each of the first optical element 31 and the second optical element 32 is formed in the shape of a disc having a first surface and a second surface that face each other in the vertical direction. The first surface (top surface) of each of the first optical element 31 and the second optical element 32 is provided with a plurality of protrusions having a sawtooth cross-section. Note that the plurality of protrusions do not necessarily have to be provided to the outer edge of the first surface of each of the first optical element 31 and the second optical element 32.

[0024] As shown in Figure 3, the first optical element 31 is held between the bottom surface of the recess 4211 of the first holding portion 421 (described later) and the bottom surface of the second holding portion 422 (described later). The first optical element 31 is positioned so that the first surface on which multiple protrusions are formed is facing upwards. As shown in Figure 3, the first optical element 31 includes a first side surface 311, a control surface 301, a connection surface 302, and a base bottom surface 303.

[0025] As shown in Figure 4, the base bottom surface 303 forms the second surface of the first optical element 31. The first side surface 311 protrudes upward from the outer edge of the base bottom surface 303 all around. Multiple teeth that mesh with the first gear 411, described later, are formed all around the first side surface 311. The control surface 301 forms the incident surface of light emitted from the light source 10. The connecting surface 302 connects two adjacent control surfaces 301 in a direction intersecting the vertical direction (left-right direction in Figure 4). In the example in Figure 4, the surface area of ​​the control surface 301 is larger than the surface area of ​​the connecting surface 302.

[0026] As shown in Figure 3, the second optical element 32 is held between the bottom surface of the recess 4222 of the second holding portion 422 and the protrusion 4234 of the third holding portion 423, which will be described later. The second optical element 32 is positioned so that the first surface on which multiple protrusions are formed is facing upwards. As shown in Figure 3, the second optical element 32 includes a first side surface 311, a control surface 301, a connection surface 302, and a base bottom surface 303. Note that the control surface 301, connection surface 302, and base bottom surface 303 of the second optical element 32 are the same as the control surface 301, connection surface 302, and base bottom surface 303 of the first optical element 31, and their description is omitted here.

[0027] The second side portion 321 of the second optical element 32 protrudes upward around its entire circumference from the outer edge of the base bottom surface 303. Multiple teeth that mesh with the second gear 412, described later, are formed around the entire circumference of the second side portion 321.

[0028] For example, as shown in Figure 7, we can assume a case where the orientation of the control surface 301 of the first optical element 31 and the orientation of the control surface 301 of the second optical element 32 are the same by operating the first rotation operation unit 41, which will be described later. In this case, the angle between the incident light and the refracted light at the control surface 301 of the first optical element 31 (hereinafter referred to as the "first angle") is +α°. Also, the first angle at the control surface 301 of the second optical element 32 is +α°. Therefore, in the example of Figure 7, the angle between the incident light to the second optical element 32 and the emitted light from the first optical element 31 (hereinafter referred to as the "second angle") is +2α°. That is, in the example of Figure 7, the emitted light from the second optical element 32 is irradiated in a direction tilted by 2 angles + 2α° with respect to the optical axis of the light source 10.

[0029] Furthermore, consider the case where, for example, as shown in Figure 8, the orientation of the control surface 301 of the first optical element 31 and the orientation of the control surface 301 of the second optical element 32 are reversed by operating the first rotation operation unit 41. In this case, the first angle at the control surface 301 of the first optical element 31 is +α°. The first angle at the control surface 301 of the second optical element 32 is -α°. Therefore, in the example of Figure 8, the second angle is ±0°. That is, in the example of Figure 8, the light emitted from the second optical element 32 is irradiated in the direction of the optical axis of the light source 10, i.e., in the vertical direction.

[0030] As described above, according to the lighting fixture 1 of this embodiment, by changing the orientation of the control surface 301 of each optical element 30, it is possible to linearly change (adjust) the direction of light irradiation along a direction intersecting the vertical direction (the left-right direction in Figures 7 and 8).

[0031] Furthermore, the first optical element 31 has a first rotation axis Ax1, and the second optical element 32 has a second rotation axis Ax2. The first rotation axis Ax1 is the axis that serves as the center of rotation when the first optical element 31 is rotated. The second rotation axis Ax2 is the axis that serves as the center of rotation when the second optical element 32 is rotated. In the examples of Figures 7 and 8, the first rotation axis Ax1 is inclined with respect to the optical axis direction of the light source 10. Also in the examples of Figures 7 and 8, the second rotation axis Ax2 is inclined with respect to the optical axis direction of the light source 10. Furthermore, as shown in Figures 7 and 8, the second rotation axis Ax2 is aligned with the first rotation axis Ax1. This makes it possible to tilt the light emitted from the light source 10 in a direction that intersects the vertical direction (the left-right direction in Figures 7 and 8) compared to the case where the first and second rotation axes are aligned with the optical axis direction of the light source 10.

[0032] In other words, in the lighting fixture 1 according to this embodiment, the first optical element 31 is inclined with respect to the optical axis direction of the light source 10 and has a first rotation axis Ax1 (rotation axis) which serves as the rotation center when the first optical element 31 is rotated. The second optical element 32, unlike the first rotation axis Ax1, has a second rotation axis Ax2 which serves as the rotation center when the second optical element 32 is rotated. The second rotation axis Ax2 is aligned with the first rotation axis Ax1. Note that the inclination angle of the first rotation axis Ax1 of the first optical element 31 with respect to the optical axis Ax0 of the light source 10 and the inclination angle of the second rotation axis Ax2 of the second optical element 32 with respect to the optical axis Ax0 of the light source 10 may be the same, or they may have a predetermined angular difference (for example, ±5°).

[0033] Here, as shown in Figure 7, it is preferable that the direction of light emission D1 emitted from the light source 10 while both the first optical element 31 and the second optical element 32 are rotated is different from the viewing direction D2, which is the direction in which the user H1 visually views the lighting fixture 1. This makes it possible to reduce glare for the user H1.

[0034] (2.1.4) Operation section As shown in Figure 5, the operating unit 40 includes a first rotation operating unit 41 and a second rotation operating unit 42. The first rotation operating unit 41 has a first rotation function. The second rotation operating unit 42 has a second rotation function.

[0035] (2.1.4.1) First Rotation Operation Section As shown in Figure 6, the first rotational operation unit 41 has a first gear section 43 and a second gear section 44.

[0036] The first gear section 43 includes a first gear 411 and a first support section 414. The first gear 411 is formed in a disc shape and is arranged so that its thickness direction is aligned with the vertical direction. Multiple teeth formed on the outer circumferential surface of the first gear 411, which mesh with the first side surface 311 of the first optical element 31 and the third gear 413 described later, are formed around its entire circumference.

[0037] The first support column 414 functions as a rotation axis for rotating the first gear 411. The first support column 414 has a first end and a second end. The first end of the first support column 414 is the lower end of the first support column 414 in the vertical direction. The second end of the first support column 414 is the upper end of the first support column 414 in the vertical direction. As shown in Figure 1, the first end of the first support column 414 protrudes downward from the lower surface of the first holding portion 421. This allows user H1 (see Figure 7) to rotate the lighting device 80 by holding the first end of the first support column 414. The second end of the first support column 414 is inserted into a recess 4233 (see Figure 2) provided in the third holding portion 423 through a through hole 4221 (see Figure 2) provided in the second holding portion 422.

[0038] The second gear section 44 includes a second gear 412, a third gear 413, and a second support section 415. The second gear 412 is formed in a disc shape and is arranged so that its thickness direction is aligned with the vertical direction. Multiple teeth that mesh with multiple teeth provided on the second side portion 321 of the second optical element 32 are formed on the outer circumferential surface of the second gear 412 all around. The third gear 413 is formed in a disc shape and is arranged so that its thickness direction is aligned with the vertical direction. Multiple teeth that mesh with the first gear 411 of the first gear section 43 are formed on the outer circumferential surface of the third gear 413 all around. The second gear 412 and the third gear 413 are positioned in a recess 4223 (see Figure 2) provided in the second holding portion 422.

[0039] The second support column 415 functions as a rotation axis for rotating the second gear 412 and the third gear 413. The second support column 415 has a first end and a second end. The first end of the second support column 415 is the lower end of the second support column 415 in the vertical direction. The second end of the second support column 415 is the upper end of the second support column 415 in the vertical direction. The first end of the second support column 415 is inserted into a recess (not shown) provided in the first retaining portion 421. The second end of the second support column 415 is inserted into a recess 4235 (see Figure 2) provided in the third retaining portion 423. As a result, the second gear portion 44 is held between the first retaining portion 421 and the third retaining portion 423, as shown in Figure 1.

[0040] As described above, the first rotation operation unit 41 is capable of rotating the first optical element 31 and the second optical element 32 by means of the first gear section 43 and the second gear section 44. In other words, the function of the first rotation operation unit 41 in rotating the first optical element 31 and the second optical element 32 is the first rotation function.

[0041] More specifically, the first rotation function is a function that applies a first rotational force to the first optical element 31 to rotate it in a first direction, and applies a second rotational force to the second optical element 32 to rotate it in a second direction opposite to the first direction. Specifically, the first optical element 31 rotates in the first direction due to the force transmitted from the first gear 411 of the first gear section 43, so the force transmitted from the first gear 411 to the first optical element 31 is the first rotational force. Also, the second optical element 32 rotates in the second direction because the rotational force of the first gear 411 of the first gear section 43 is transmitted through the second gear 412 and third gear 413 of the second gear section 44, so the force transmitted to the second optical element 32 via the second gear 412 and third gear 413 is the second rotational force.

[0042] In this embodiment, as an example, by rotating the first support column 414 of the first gear section 43 in the second direction, it is possible to rotate the first optical element 31 in the first direction and the second optical element 32 in the second direction. Alternatively, instead of rotating the first support column 414 of the first gear section 43, the first optical element 31 may be rotated directly.

[0043] (2.1.4.2) Second Rotation Control Section As shown in Figure 3, the second rotation operation unit 42 has a first holding unit 421, a second holding unit 422, and a third holding unit 423.

[0044] As shown in Figures 2 and 3, the first retaining portion 421 is formed in an annular shape with its thickness direction being vertical. The first retaining portion 421 has a recess 4211. The recess 4211 is formed in a circular shape when viewed from above, and accommodates the first optical element 31 (see Figure 3).

[0045] As shown in Figures 2 and 3, the second retaining portion 422 is formed in a cylindrical shape with its thickness direction being vertical. The second retaining portion 422 has a through hole 4221 and two recesses 4222 and 4223. The through hole 4221 penetrates the second retaining portion 422 in the thickness direction (vertical direction), and the first support portion 414 of the first gear portion 43 is inserted through it. The recess 4222 is formed in a circular shape when viewed from above, and accommodates the second optical element 32 (see Figure 3). The recess 4223 is formed in an elliptical shape when viewed from below, and accommodates the first gear 411 of the first gear portion 43, and the second gear 412 and third gear 413 of the second gear portion 44 (see Figure 1).

[0046] As shown in Figures 2 and 3, the third retaining portion 423 is formed in a cylindrical shape with its thickness direction being vertical. The third retaining portion 423 has two recesses 4233 and 4235 and a protrusion 4234. The recess 4233 is formed in a circular shape when viewed from below, and the second end (upper end) of the first support portion 414 of the first gear portion 43 is inserted into it. The recess 4235 is formed in a circular shape when viewed from below, and the second end (upper end) of the second support portion 415 of the second gear portion 44 is inserted into it. The protrusion 4234 protrudes downward from the lower surface of the third retaining portion 423 around its entire circumference.

[0047] The first optical element 31 is held vertically between the first retaining portion 421 and the second retaining portion 422. More specifically, the first optical element 31 is held sandwiched between the bottom surface of the recess 4211 of the first retaining portion 421 and the bottom surface of the second retaining portion 422 (see Figure 3). At this time, the multiple protrusions of the first optical element 31 are housed within the second retaining portion 422. The first retaining portion 421 and the second retaining portion 422 are fixed together using three first screws 70.

[0048] The second optical element 32 is held vertically between the second holding portion 422 and the third holding portion 423. More specifically, the second optical element 32 is held sandwiched between the bottom surface of the recess 4222 of the second holding portion 422 and the protrusion 4234 of the third holding portion 423 (see Figure 3). At this time, the multiple protrusions of the second optical element 32 are housed within the third holding portion 423. The second holding portion 422 and the third holding portion 423 are fixed together using three second screws 71.

[0049] Furthermore, as shown in Figures 1 and 2, the third retaining portion 423 further includes a first operating recess 4231 and a second operating recess 4232.

[0050] The first operating recess 4231 is a groove formed on the outer circumference of the third retaining portion 423. More specifically, as shown in Figure 3, the first operating recess 4231 is a groove for the operation projection 51, which will be described later, to move. The first operating recess 4231 is formed around the entire circumference of the third retaining portion 423. The first operating recess 4231 and the operation projection 51 make it possible to rotate the lighting device 80 relative to the cover body 50a.

[0051] The second operating recess 4232 is a groove formed on the outer circumference of the third retaining portion 423. More specifically, the second operating recess 4232 is a groove for guiding the operating projection 51 provided on the cover body 50a to the first operating recess 4231, and is connected to the first operating recess 4231 in the vertical direction (see Figure 2). The third retaining portion 423 has two second operating recesses 4232 (only one is shown in Figure 2). The two second operating recesses 4232 are formed at positions opposite to each other in the radial direction of the third retaining portion 423. More specifically, the two second operating recesses 4232 are provided at positions that are point-symmetric with respect to the center of the third retaining portion 423 in a plan view from the vertical direction.

[0052] Here, when the second rotation operation unit 42 is rotated so that the operation projection 51 moves along the first operation recess 4231, the first optical element 31 and the second optical element 32 rotate in the same direction by the same amount with the axis of rotation being the axis of rotation along the optical axis direction of the light source 10 (the direction along the optical axis Ax0).

[0053] (2.2) Cover body As shown in Figure 1, the cover body 50a is formed in a bottomed cylindrical shape with an open bottom. A flange portion 501 that protrudes outward is formed around the entire circumference of the open edge of the cover body 50a. The cover body 50a houses the lighting device 80. After inserting the cover body 50a, which houses the lighting device 80, into a recessed hole formed in the ceiling of the facility, the lighting fixture 1 is attached to the ceiling by sandwiching the ceiling material between a pair of mounting springs (not shown) and the flange portion 501 of the cover body 50a.

[0054] The cover body 50a functions as a position operation unit 50. The position operation unit 50 (operation unit) moves at least the condensing lens 20 among the first optical element 31, the second optical element 32, and the condensing lens 20 along the optical axis. In this embodiment, the position operation unit 50 moves only the condensing lens 20 along the optical axis.

[0055] As shown in Figure 3, the positioning unit 50 has two operating protrusions 51. The two operating protrusions 51 are formed on the inner circumferential surface of the cover body 50a at positions facing each other. More specifically, the two operating protrusions 51 are positioned point-symmetrically with respect to the center of the cover body 50a in a plan view from the vertical direction.

[0056] Each of the two operating protrusions 51 is fitted into the first operating recess 4231 through the corresponding second operating recess 4232 of the two second operating recesses 4232 formed in the third holding portion 423. This combines the second rotation operating portion 42 and the position operating portion 50. In this way, the fitting of the two operating protrusions 51 into the first operating recess 4231 makes the second rotation operating portion 42 rotatable relative to the position operating portion 50. In other words, the two operating protrusions 51 contribute to the second rotation operating portion 42 performing its second rotation function.

[0057] The position control unit 50 allows adjustment of the range of light emitted from the lighting device 80 by adjusting the distance between the light source 10 and the focusing lens 20.

[0058] (3) Operation Next, the operation of the first rotation operation unit 41 and the second rotation operation unit 42 will be explained with reference to Figures 7 and 8.

[0059] First, the operation of the first rotary control unit 41 will be explained. The first rotary control unit 41, for example, linearly changes the direction of the light emitted from the lighting device 80.

[0060] By rotating the first support column 414 of the first rotation operation unit 41, the relative positions of the first optical element 31 and the second optical element 32 are changed. For example, as shown in Figure 7, the first optical element 31 and the second optical element 32 are positioned so that the orientation of the control surface 301 of the first optical element 31 and the orientation of the control surface 301 of the second optical element 32 are the same. In this case, when the first angle between the incident light and the refracted light at the respective control surfaces 301 of the first optical element 31 and the second optical element 32 is +α°, the second angle between the light emitted to the outside after passing through the first optical element 31 and the second optical element 32 and the incident light on the second optical element 32 is +2α° (see Figure 7). That is, in this case, the light emitted from the light source 10 passes through the first optical element 31 and the second optical element 32 and is irradiated in a direction tilted by 2 angles with respect to the vertical direction (optical axis direction).

[0061] On the other hand, as shown in Figure 8, the first optical element 31 and the second optical element 32 are arranged such that the orientation of the control surface 301 of the first optical element 31 and the orientation of the control surface 301 of the second optical element 32 are opposite. In this case, the first angle at the first optical element 31 is +α° and the first angle at the second optical element 32 is -α°, so they cancel each other out and the second angle becomes ±0°. That is, in this case, the light emitted from the light source 10 passes through the first optical element 31 and the second optical element 32 and is irradiated in the direction along the optical axis direction of the light source 10 (up and down direction).

[0062] As described above, in response to the operation of the first rotation operation unit 41, it is possible to linearly change the direction of the light that passes through the first optical element 31 and the second optical element 32 and is irradiated to the outside.

[0063] Next, the operation of the second rotary control unit 42 will be described. The second rotary control unit 42 changes, for example, the direction of illumination of the light emitted from the lighting device 80 along the circumferential direction centered on the optical axis Ax0 of the light source 10. More specifically, the rotational operation of the second rotary control unit 42 makes it possible to change the direction of illumination of the light emitted from the light source 10 by 360°.

[0064] According to the lighting fixture 1 of this embodiment, by combining a first rotation operation unit 41 having a first rotation function and a second rotation operation unit 42 having a second rotation function, it becomes possible to freely adjust the direction of illumination of the light emitted from the light source 10, similar to a universal downlight.

[0065] (4) Effects In the lighting fixture 1 according to this embodiment, the first rotation axis Ax1 of the first optical element 31 is inclined with respect to the optical axis direction, so that the light emitted from the light source 10 can be irradiated in a direction different from the optical axis direction, and as a result, glare can be suppressed.

[0066] In the lighting fixture 1 according to this embodiment, the second rotation axis Ax2 of the second optical element 32 is aligned with the first rotation axis Ax1 of the first optical element 31. Therefore, by adjusting the orientation of the control surface 301 of the first optical element 31 and the orientation of the control surface 301 of the second optical element 32, it is possible to linearly change the direction of the light emitted from the light source 10.

[0067] The lighting fixture 1 according to this embodiment includes a condensing lens 20 positioned between the light source 10 and the second optical element 32, making it possible to concentrate the light emitted from the light source 10 toward the optical axis Ax0.

[0068] In the lighting fixture 1 according to this embodiment, the refraction angle of the first optical element 31 and the refraction angle of the second optical element 32 are the same, making it possible to linearly adjust the angle of the light emitted from the light source 10.

[0069] The lighting fixture 1 according to this embodiment is equipped with a position control unit 50, which makes it possible to move the condensing lens 20 along the optical axis.

[0070] In the lighting fixture 1 according to this embodiment, the direction of light emission D1 from the light source 10 is different from the viewing direction D2, which is the direction in which the user H1 looks at the lighting fixture 1, making it possible to reduce glare for the user H1.

[0071] (5) Variant The embodiments described above are merely one of many embodiments of this disclosure. The embodiments described above can be modified in various ways depending on the design, etc., as long as the objectives of this disclosure are achieved. The following lists some modifications of the embodiments described above. The modifications described below can be combined and applied as appropriate.

[0072] (5.1) Variation 1 In the above-described embodiment, the position operation unit 50 is configured to move the condensing lens 20 along the optical axis direction of the light source 10. In contrast, the position operation unit 50 may be configured to move at least one of the first optical element 31 and the second optical element 32 in the optical axis direction in addition to the condensing lens 20. That is, the position operation unit 50 (operation unit) only needs to be configured to move at least the condensing lens 20 among the first optical element 31, the second optical element 32, and the condensing lens 20 along the optical axis direction. This makes it possible to move not only the condensing lens 20 but also at least one of the first optical element 31 and the second optical element 32 in the optical axis direction.

[0073] (5.2) Variation 2 In the above-described embodiment, both the first surface of the first optical element 31, which is provided with multiple protrusions, and the first surface of the second optical element 32 are facing upward. In contrast, for example, as shown in Figure 9, the first surface of the second optical element 32, which is provided with multiple protrusions, may be facing downward.

[0074] (5.3) Modification 3 In the above-described embodiment, both the first surface of the first optical element 31, which is provided with multiple protrusions, and the first surface of the second optical element 32 face upward. In contrast, as shown in Figure 10, for example, both the first surface of the first optical element 31, which is provided with multiple protrusions, and the first surface of the second optical element 32 may face downward.

[0075] (5.4) Modification 4 In the above-described embodiment, multiple protrusions are provided only on the first surface (top surface) of the first optical element 31 and the first surface (top surface) of the second optical element 32. In contrast, for example, as shown in Figure 11, multiple protrusions may be provided on both the first surface (top surface) and the second surface (bottom surface) of the first optical element 31a. Similarly, multiple protrusions may be provided on both the first surface (top surface) and the second surface (bottom surface) of the second optical element 32a.

[0076] (5.5) Variation 5 A light-shielding member 304 may be provided on at least one of the connection surfaces 302 of the first optical element 31 and the second optical element 32 (see Figure 12). Preferably, the light-shielding member 304 is provided on both the connection surface 302 of the first optical element 31 and the connection surface 302 of the second optical element 32. This makes it possible to shield the light emitted from the light source 10 that is directed toward the connection surface 302.

[0077] Alternatively, instead of the light-shielding member 304, the connection surface 302 may be treated with a light-absorbing coating. Specifically, the connection surface 302 may be painted black.

[0078] (5.6) Variation 6 At least one of the connection surfaces 302 of the first optical element 31 and the second optical element 32 may be treated with a textured finish. Preferably, both the connection surfaces 302 of the first optical element 31 and the second optical element 32 are treated with a textured finish. Furthermore, as shown in Figure 13, it is preferable that all connection surfaces 302 of each optical element 30 are treated with a textured finish. The textured finish on the connection surface 302 may be, for example, a textured surface or a dimpled surface. This makes it possible to diffuse the light passing through the connection surface 302.

[0079] (5.7) Variation 7 At least one of the base bottom surface 303 of the first optical element 31 and the base bottom surface 303 of the second optical element 32 may be subjected to a textured surface treatment. Preferably, both the base bottom surface 303 of the first optical element 31 and the base bottom surface 303 of the second optical element 32 are subjected to a textured surface treatment (see Figure 14). The textured surface treatment on the connecting surface 302 may be, for example, a textured surface or a dimpled surface. This makes it possible to diffuse the light that passes through the connecting surface 302 and heads toward the base bottom surface 303.

[0080] (5.8) Variation 8 In the above-described embodiment, as shown in Figures 7 and 8, a condensing lens 20 is provided between the second optical element 32 and the light source 10, in addition to the first optical element 31 and the second optical element 32. In contrast, as shown in Figure 15, the condensing lens 20, which is positioned between the first optical element 31 and the light source 10 in the optical axis direction of the light source 10, may be the second optical element 32. That is, the second optical element 32 may be the condensing lens 20, which is positioned between the first optical element 31 and the light source 10 in the optical axis direction. As a result, the light emitted from the light source 10 passes only through the first optical element 31 and the condensing lens 20, which is the second optical element 32, making it possible to improve the efficiency of light extraction from the light source 10.

[0081] In this case, it is preferable that the position operation unit 50 (operation unit) is configured to move at least the second optical element 32 (focusing lens 20) of the first optical element 31 along the optical axis direction of the light source 10.

[0082] (5.9) Variation 9 In the above-described embodiment, the operating unit 40 is configured to be operated manually. In contrast, the lighting fixture 1 may further include a drive unit 60 for driving the operating unit 40. The drive unit 60 includes, for example, a first motor and a second motor. The first motor is configured to rotate a first gear 411 attached to the first support column 414 of the first rotary operating unit 41. The second motor is configured to rotate the lighting device 80 relative to the cover body 50a.

[0083] In the example shown in Figure 16, the drive unit 60 is located outside the lighting device 80, but it may also be located inside the lighting device 80, for example. More specifically, it is preferable that the drive unit 60 is located in the operating unit 40 of the lighting device 80.

[0084] With this configuration, the drive unit 60 can automatically adjust the positions of the first optical element 31 and the second optical element 32.

[0085] (5.10) Other variations The following lists other modifications of the embodiments described above.

[0086] In the embodiment described above, the objects rotated by the second rotation operation unit 42 are the first optical element 31 and the second optical element 32. In contrast, the objects rotated by the second rotation operation unit 42 may include at least one of the light source 10 and the condensing lens 20, in addition to the first optical element 31 and the second optical element 32.

[0087] In the above-described embodiment, the lighting device 80 is rotated relative to the cover body 50a, thereby rotating the first optical element 31 and the second optical element 32. Alternatively, a groove may be formed on the bottom surface of the first holding portion 421 so that the first support portion 414 can move along the circumferential direction of the first holding portion 421. In this case, the first optical element 31 and the second optical element 32 connected to the first support portion 414 can be rotated by rotating the first support portion 414 along the groove formed in the first holding portion 421.

[0088] In the above-described embodiment, the amount of rotation of the first optical element 31 and the amount of rotation of the second optical element 32 are the same. In contrast, the amount of rotation of the first optical element 31 and the amount of rotation of the second optical element 32 may be different.

[0089] In the above-described embodiment, the refraction angle of the first optical element 31 and the refraction angle of the second optical element 32 are the same. In contrast, the refraction angle of the first optical element 31 and the refraction angle of the second optical element 32 may be different.

[0090] In the embodiment described above, the second rotation axis Ax2 of the second optical element 32 is aligned with (parallel to) the first rotation axis Ax1 of the first optical element 31. In contrast, the second rotation axis Ax2 of the second optical element 32 does not have to be aligned with the first rotation axis Ax1 of the first optical element 31.

[0091] In the above-described embodiment, there are two second operating recesses 4232 and two operating protrusions 51. In contrast, there may be one second operating recess 4232 and one operating protrusion 51, or there may be three or more.

[0092] In the above-described embodiment, the position operation unit 50 is configured to adjust the position of the condensing lens 20 in the optical axis direction of the light source 10. Alternatively, the position operation unit 50 may be configured to adjust the positions of the condensing lens 20 and the first optical element 31 in the optical axis direction of the light source 10. Furthermore, the position operation unit 50 may be configured to adjust the positions of the condensing lens 20 and the second optical element 32 in the optical axis direction of the light source 10. Furthermore, the position operation unit 50 may be configured to adjust the positions of the condensing lens 20, the first optical element 31, and the second optical element 32 in the optical axis direction of the light source 10.

[0093] In the above-described embodiment, the first rotation operation unit 41 is configured to be operated directly. In contrast, the operation unit 40 may further include an operation receiving unit that receives rotational operations of the first optical element 31 and the second optical element 32. The operation receiving unit is, for example, a dial or a lever. In this case, the first rotation operation unit 41 can rotate the first optical element 31 and the second optical element 32 in response to operations on the operation receiving unit.

[0094] In the above-described embodiment, a first optical element 31 and a second optical element 32 are used, each having multiple protrusions with a sawtooth-shaped cross-section. Alternatively, a first optical element 31 and a second optical element 32 consisting of a triangular prism may be used.

[0095] (Aspect) This specification discloses the following aspects:

[0096] The lighting fixture (1) according to the first embodiment comprises a light source (10), a first optical element (31), and a second optical element (32). The light source (10) emits light. The first optical element (31) and the second optical element (32) are arranged along the optical axis of the light source (10) and refract the light emitted from the light source (10) in a predetermined direction. The first optical element (31) and the second optical element (32) are arranged in the order of second optical element (32) and first optical element (31) from the light source (10) side in the optical axis direction. The first optical element (31) is inclined with respect to the optical axis direction and has a rotation axis (Ax1) which is the center of rotation when the first optical element (31) is rotated.

[0097] According to this embodiment, since the rotation axis (Ax1) of the first optical element (31) is inclined with respect to the optical axis direction, it becomes possible to irradiate the light emitted from the light source (10) in a direction different from the optical axis direction, and as a result, glare can be suppressed.

[0098] In the lighting fixture (1) according to the second embodiment, in the first embodiment, the second optical element (32) has a second rotation axis (Ax2) which is the center of rotation when the second optical element (32) is rotated, in contrast to the first rotation axis (Ax1), which is the rotation axis (Ax1). The second rotation axis (Ax2) is aligned with the first rotation axis (Ax1).

[0099] According to this embodiment, it is possible to reduce uncontrolled light.

[0100] The lighting fixture (1) according to the third embodiment further comprises a condensing lens (20) in the first or second embodiment. The condensing lens (20) is positioned between the second optical element (32) and the light source (10) in the optical axis direction.

[0101] According to this embodiment, the condensing lens (20) makes it possible to concentrate the light emitted from the light source (10).

[0102] In the lighting fixture (1) according to the fourth embodiment, the refraction angle of the first optical element (31) and the refraction angle of the second optical element (32) are the same as in the third embodiment.

[0103] According to this embodiment, it becomes possible to linearly adjust the light emitted from the light source (10).

[0104] The illuminating fixture (1) according to the fifth embodiment further comprises an operating unit (50) in the third or fourth embodiment. The operating unit (50) moves at least the condensing lens (20) among the first optical element (31), the second optical element (32), and the condensing lens (20) along the optical axis.

[0105] According to this embodiment, it is possible to move at least the focusing lens (20) along the optical axis.

[0106] In the lighting fixture (1) according to the sixth embodiment, in the first or second embodiment, the second optical element (32) is a condensing lens (20) positioned between the first optical element (31) and the light source (10) in the optical axis direction.

[0107] According to this embodiment, the second optical element (32) makes it possible to concentrate the light emitted from the light source (10), and also makes it possible to improve the efficiency of extracting the light emitted from the light source (10).

[0108] The lighting fixture (1) according to the seventh embodiment further comprises an operating unit (50) in the sixth embodiment. The operating unit (50) moves at least the second optical element (32) of the first optical element (31) and the second optical element (32) along the optical axis direction.

[0109] According to this embodiment, it is possible to move at least the second optical element (32) along the optical axis direction.

[0110] In the luminaire (1) according to the eighth embodiment, in any one of the first to seventh embodiments, the direction of light emission (D1) emitted from the light source (10) with at least the first optical element (31) among the first optical element (31) and the second optical element (32) rotated is different from the viewing direction (D2) in which the user (H1) visually views the luminaire (1).

[0111] According to this embodiment, it is possible to reduce glare for the user (H1).

[0112] The configurations relating to the second to eighth aspects are not essential to the lighting device (80) and can be omitted as appropriate. [Explanation of Symbols]

[0113] 1 Lighting fixtures 10 light source 20 Focusing lenses 31 First optical element 32. Second optical element 50 Position operation section (operation section) Ax1 First axis of rotation (axis of rotation) Ax2 Second rotation axis D1 Output direction D2 Viewing direction H1 User

Claims

1. A light source that emits light, The system comprises a first optical element and a second optical element, which are arranged along the optical axis of the light source and refract the light emitted from the light source in a predetermined direction. The first optical element and the second optical element are arranged in the optical axis direction from the light source side in the order of the second optical element followed by the first optical element. The first optical element is inclined with respect to the optical axis and has a rotation axis that serves as the center of rotation when the first optical element is rotated. Lighting fixtures.

2. Unlike the first rotation axis, which is the rotation axis, the second optical element has a second rotation axis that serves as the center of rotation when the second optical element is rotated. The second axis of rotation is aligned with the first axis of rotation. The lighting fixture according to claim 1.

3. The system further comprises a focusing lens positioned between the second optical element and the light source in the optical axis direction. A lighting fixture according to claim 1 or 2.

4. The angle of refraction of the first optical element and the angle of refraction of the second optical element are the same. The lighting fixture according to claim 3.

5. The device further comprises an operating unit for moving at least the condensing lens among the first optical element, the second optical element, and the condensing lens along the optical axis direction. The lighting fixture according to claim 3.

6. The second optical element is a focusing lens positioned between the first optical element and the light source in the optical axis direction. A lighting fixture according to claim 1 or 2.

7. The device further includes an operating unit for moving at least the second optical element, among the first and second optical elements, along the optical axis direction. The lighting fixture according to claim 6.

8. The direction of emission of the light emitted from the light source while at least the first optical element among the first and second optical elements is rotated is different from the viewing direction, which is the direction in which the user visually views the lighting fixture. A lighting fixture according to claim 1 or 2.

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