Lighting fixtures

Abstract

The problem addressed by this disclosure is to change the direction of illumination of light emitted from a light source. [Solution] The lighting fixture 1 comprises a light source 10, a pair of optical elements 30, and an operating unit 40. The light source 10 emits light. The pair of optical elements 30 are arranged side by side along the optical axis of the light source 10 and have the function of bending the light emitted from the light source 10 in a predetermined direction. The operating unit 40 has a first rotation function that rotates each of the pair of optical elements 30 by the same amount in opposite directions with the axis along the optical axis as the axis of rotation, and a second rotation function that rotates both of the pair of optical elements 30 by the same amount in the same direction with the axis along the optical axis as the axis of rotation, thereby adjusting the rotation of the pair of optical elements 30.

Description

Technical Field

[0001] The present disclosure generally relates to lighting fixtures, and more particularly to lighting fixtures with a changeable irradiation direction.

Background Art

[0002] Patent Document 1 provides a lighting fixture capable of varying the light distribution without increasing the size of the fixture body.

[0003] The lighting fixture of Patent Document 1 includes a flat plate-shaped surface light source having a light-emitting surface that emits light, and flat plate-shaped first and second prism panels each having a light-emitting surface provided below the surface light source to change the irradiation direction of the light irradiated from the surface light source, a substantially circular first support frame and a second support frame that support so as to cover the entire circumference of each of the first prism panel and the second prism panel, and a bottomed cylindrical body having an open bottom surface and configured to house the surface light source, the first prism panel, the second prism panel, the first support frame, and the second support frame. By rotating each support frame by hand, each prism panel can be rotated independently of each other.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In Patent Document 1, each of the two optical elements can be independently operated to vary the light distribution. However, since the two optical elements are independent of each other, it is difficult for the user to intuitively determine the irradiation direction.

[0006] This disclosure is made in view of the above-mentioned issues and aims to provide a lighting fixture that allows users to more intuitively determine the direction of illumination. [Means for solving the problem]

[0007] A lighting fixture according to one aspect of the present disclosure comprises a light source, a pair of optical elements, and an operating unit. The light source emits light. The pair of optical elements are arranged side by side along the optical axis of the light source and have the function of bending the light emitted from the light source in a predetermined direction. The operating unit has a first rotation function that rotates each of the pair of optical elements by the same amount in opposite directions with respect to the axis along the optical axis, and a second rotation function that rotates both of the pair of optical elements by the same amount in the same direction with respect to the axis along the optical axis, thereby adjusting the rotation of the pair of optical elements. [Effects of the Invention]

[0008] According to one aspect of this disclosure, a lighting fixture allows the user to determine the direction of illumination more intuitively. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is an exploded perspective view of the lighting fixture according to this 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 cross-sectional view showing a portion of the first optical element of the lighting fixture described above. [Figure 5] Figure 5 is a block diagram showing the configuration of the lighting fixture mentioned above. [Figure 6] Figure 6 is a side view of the pair of optical elements and the first rotary operating section of the same lighting fixture. [Figure 7] Figure 7 is a schematic diagram illustrating the principle of refraction of a pair of optical elements in the same lighting fixture. [Figure 8]FIG. 8 is another schematic view showing the principle of the refraction action of a pair of optical elements included in the lighting fixture described above. [Figure 9] FIG. 9 is a side view showing the operation of the first rotation operation unit included in the lighting fixture described above. [Figure 10] FIG. 10 is a side view showing the operation of the second rotation operation unit included in the lighting fixture described above. [Figure 11] FIG. 11 is a cross-sectional view showing an example of the arrangement of the optical elements included in the lighting fixture of Modification 7. [Figure 12] FIG. 12 is a cross-sectional view showing another example of the arrangement of the optical elements included in the lighting fixture of Modification 7. [Figure 13] FIG. 13 is a cross-sectional view showing an example of the optical elements included in the lighting fixture of Modification 8. [Figure 14] FIG. 14 is a cross-sectional view showing an example of the processing of the optical elements included in the lighting fixture of Modification 9. [Figure 15] FIG. 15 is a cross-sectional view showing another example of the processing of the optical elements included in the lighting fixture of Modification 9. [Figure 16] FIG. 16 is a cross-sectional view showing yet another example of the processing of the optical elements included in the lighting fixture of Modification 9. [Figure 17] FIG. 17 is a block diagram showing the configuration of Modification 10.

MODE FOR CARRYING OUT THE INVENTION

[0010] The embodiments and modifications described below are merely examples of the present disclosure, and the present disclosure is not limited to the embodiments and modifications. Even outside the following embodiments and modifications, various changes can be made according to the design and the like as long as the technical idea according to the present disclosure is not deviated from.

[0011] (Embodiment) Hereinafter, the lighting fixture 1 according to the present embodiment will be described with reference to FIGS. 1 to 10.

[0012] In this embodiment, as shown in FIG. 1, the vertical direction is defined for the lighting fixture 1. For example, in FIG. 1, when the lighting fixture 1 is installed on the ceiling, the direction extending from the ground to the ceiling is defined as the vertical direction. FIGS. 1 to 4, FIGS. 6 to 10 show arrows representing these directions (up, down), but these arrows are merely described for the purpose of assisting the explanation and have no physical entity. Further, the definition of the above direction is not intended to limit the usage form of the lighting fixture of this embodiment.

[0013] (1) Overview As shown in FIG. 5, the lighting fixture 1 according to this embodiment includes a light source 10, a pair of optical elements 30, and an operation unit 40. The light source 10 emits light. The pair of optical elements 30 are arranged side by side along the optical axis direction of the light source 10 and have the function of bending the light emitted from the light source 10 in a predetermined direction. The operation unit 40 adjusts the rotation of the pair of optical elements 30. The operation unit 40 has a first rotation function of rotating each of the pair of optical elements 30 in opposite directions by the same amount around an axis along the optical axis direction of the light source 10, and a second rotation function of rotating both of the pair of optical elements 30 in the same direction by the same amount around an axis along the optical axis direction of the light source 10.

[0014] According to this configuration, the irradiation direction of light can be mechanically changed by using an operation unit having two functions. That is, the user can more intuitively determine the irradiation direction.

[0015] (2) Configuration As shown in FIG. 1, the lighting fixture 1 according to this embodiment includes a lighting device 80 and a cover body 50a as a position operation unit 50. The lighting fixture 1 is, for example, a universal downlight.

[0016] (2.1) Lighting Device As shown in FIG. 5, the lighting device 80 includes a light source 10, a condenser lens 20, a pair of optical elements 30, and an operation unit 40.

[0017] The lighting device 80 is a device that integrates a variable mechanism for the irradiation direction of light in the lighting fixture 1.

[0018] (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. The light source 10 may also have light-emitting elements other than LEDs, such as organic EL (Electro Luminescence) elements or laser diodes.

[0019] (2.1.2) Focusing lens The condensing lens 20 is made of a light-transmitting material, such as acrylic, silicone resin, or polycarbonate, or glass. The condensing lens 20 is positioned between the pair of optical elements 30 and the light source 10. The condensing lens 20 is a lens that collects the light emitted from the light source 10. When light emitted from the light source 10 is incident on the condensing lens 20, it emits the light towards the pair of optical elements 30.

[0020] (2.1.3) Optical elements The pair of optical elements 30 are made of a light-transmitting material, such as acrylic, silicone resin, or polycarbonate, or glass. The pair of optical elements 30 are arranged side by side along the optical axis of the light source 10. Each of the pair of optical elements 30 is identical in shape and has the same angle of emitted light relative to the incident light. However, it is not limited to using optical elements 30 that each have the same shape and the same angle of emitted light relative to the incident light. Each of the pair of optical elements 30 may have the same shape, each may have a different shape, or each may have a different angle of emitted light relative to the incident light. The pair of optical elements 30 have the function of bending the light emitted from the light source 10 and focused by the condensing lens 20 in a predetermined direction. The pair of optical elements 30 have the function of refracting the light emitted from the light source 10 and focused by the condensing lens 20 in a predetermined direction. As shown in Figure 5, the pair of optical elements 30 includes a first optical element 31 and a second optical element 32.

[0021] The first optical element 31 and the second optical element 32 are formed in a disc shape, as shown in Figure 2. The first optical element 31 and the second optical element have a sawtooth pattern on at least one of their two surfaces in the thickness direction (vertical direction). The edges of the said surface do not need to have a sawtooth pattern. The sawtooth pattern applied to the first optical element 31 and the second optical element 32 may be cut in the middle.

[0022] As shown in Figure 3, the first optical element 31 is held between a first recess 4211 provided in the first holding portion 421 (described later) and the lower surface of the second holding portion 422 (described later). The first optical element 31 is positioned with the sawtooth-shaped processed surface (hereinafter referred to as the processed surface) facing upward. 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.

[0023] As shown in Figure 4, the base bottom surface 303 forms the bottom surface located below the first optical element 31. The first side surface 311 is provided on the circumference of the base bottom surface 303. The first side surface 311 is machined into a gear shape so as to mesh with the first gear 411, which will be described later. The combination of the control surface 301 and the connection surface 302 forms a protrusion that extends from the base bottom surface 303. In this embodiment, as shown in Figure 4, the combination of the control surface 301 and the connection surface 302 forms a protrusion that extends upward from the base bottom surface 303. The control surface 301 is a machined surface with a larger area than the connection surface 302.

[0024] As shown in Figure 3, the second optical element 32 is held by being fitted between a second recess 4222 provided in the second holding portion 422 and a protrusion 4234 provided on the lower surface of the third holding portion 423, which will be described later. The second optical element 32 is positioned with its processed surface facing upward. As shown in Figure 3, the second optical element 32 includes a second side portion 321. Similar to the first optical element 31, the second optical element 32 includes a control surface 301, a connection surface 302, and a base bottom surface 303.

[0025] In the second optical element 32, the control surface 301, the connection surface 302, and the base bottom surface 303 are provided in the same locations as in the first optical element 31. The second side surface 321 corresponds to the first side surface 311. That is, it is provided on the circumference of the base bottom surface 303 of the second optical element 32. Furthermore, the second side surface 321 is machined to be gear-like so as to mesh with the second gear 412, which will be described later.

[0026] If the orientation of each control surface 301 included in the pair of optical elements 30 is set to the same direction, for example as shown in Figure 7, then, as shown in Figure 7, the angle α of the emitted light relative to the incident light at each control surface 301 of the pair of optical elements 30 is added together. That is, the light emitted from the condensing lens 20 passes through each control surface 301 included in the pair of optical elements 30 and is irradiated in a direction shifted by an angle of 2α with respect to the axis along the optical axis direction (vertical direction) of the light source 10.

[0027] If the orientation of each control surface 301 included in the pair of optical elements 30 is set to opposite directions, for example as shown in Figure 8, the angle α of the emitted light relative to the incident light at each control surface 301 of the pair of optical elements 30 cancels out. That is, the light emitted from the condensing lens 20 passes through each control surface 301 included in the pair of optical elements 30 and is irradiated in the axial direction along the optical axis direction (up and down direction) of the light source 10.

[0028] Therefore, the irradiation direction can be linearly changed by the orientation of each control surface 301 included in the pair of optical elements 30, as shown in Figure 9.

[0029] (2.1.4) Operation section As shown in Figure 5, the operating unit 40 includes a first rotation operating unit 41 having a first rotation function and a second rotation operating unit 42 having a second rotation function. The operating unit 40 includes a holding unit 42a (see Figure 3) as the second rotation operating unit 42.

[0030] (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.

[0031] As shown in Figure 6, the first gear section 43 includes a first gear 411 and a first support section 414.

[0032] 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 that mesh with the first side portion 311 of the first optical element 31 and the third gear 413 (described later) are formed on the outer circumferential surface of the first gear 411 all the way around.

[0033] The first support column 414 functions as a rotation axis for rotating the first gear 411. The first tip of the lower end of the first support column 414 protrudes downward from the lower surface of the first retaining portion 421, as shown in Figure 1. This allows the user to rotate the first tip of the first support column 414. The second tip of the upper end of the first support column 414 passes through the through hole 4221 provided in the second retaining portion 422 and is inserted into the fourth recess 4233 provided in the third retaining portion 423, as shown in Figure 2.

[0034] The second gear section 44 includes a second gear 412, a third gear 413, and a second support column section 415.

[0035] 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 on a disc 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 portion 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 the third recess 4223 (see Figure 2) provided in the second holding portion 422.

[0036] The second support column 415 functions as a rotation axis for rotating the second gear 412 and the third gear 413. The second gear 412 and the third gear 413 are positioned in recesses provided in the second retaining portion 422. The third tip of the lower end of the second support column 415 is inserted into a recess provided in the first retaining portion 421. The fourth tip of the upper end of the second support column 415 is inserted into a fifth recess 4235 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.

[0037] As described above, the first rotational operation unit 41 can transmit rotational force to the first optical element 31 and the second optical element 32 via the first gear section 43 and the second gear section 44. In other words, the first rotational operation unit 41 has a first rotational function.

[0038] More specifically, the first rotation function is to rotate the first optical element 31 in one direction when a first rotational force is applied to it, and to rotate the second optical element 32 in the opposite direction when a second rotational force is applied to it. Specifically, the first optical element 31 rotates in the aforementioned one 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. Furthermore, the second optical element 32 rotates in the opposite direction due to the first rotational force being transmitted to it via the second gear 412 and the 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 the third gear 413 is the second rotational force.

[0039] As described above, the first optical element 31 and the second optical element 32 rotate in opposite directions to each other in response to the operation of the first support column 414 included in the first gear section 43.

[0040] (2.1.4.2) Second Rotation Control Section The holding part 42a, which functions as the second rotation operation part 42, holds the pair of optical elements 30 and rotates with an axis aligned with the optical axis direction of the light source 10 as its axis of rotation, thereby having a second rotation function. That is, both of the pair of optical elements 30 rotate in the same direction by the same amount as the holding part 42a rotates. However, the amount of rotation of both of the pair of optical elements 30 is not limited to being the same.

[0041] The second rotating operation unit 42, which is the holding unit 42a, has a first holding unit 421, a second holding unit 422, and a third holding unit 423, as shown in Figure 3.

[0042] 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 first recess 4211. The first recess 4211 is formed in a circular shape when viewed from above, and accommodates the first optical element 31.

[0043] 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, a second recess 4222, and a third recess 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 second recess 4222 is formed in a circular shape when viewed from above, and accommodates the second optical element 32. The third recess 4223 is formed in an elliptical shape when viewed from below, and accommodates the first gear 411 of the first gear portion 43, the second gear 412 of the second gear portion 44, and the third gear 413.

[0044] 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 a fourth recess 4233, a protrusion 4234, and a fifth recess 4235. The fourth recess 4233 is formed in a circular shape when viewed from below, and the second tip (upper end) of the first support portion 414 of the first gear portion 43 is inserted into it. The fifth recess 4235 is formed in a circular shape when viewed from below, and the fourth tip (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.

[0045] The first optical element 31 is held vertically between the first retaining portion 421 and the second retaining portion 422. More specifically, as shown in Figure 3, the first optical element 31 is held sandwiched between the bottom surface of the first recess 4211 of the first retaining portion 421 and the bottom surface of the second retaining portion 422. At this time, the sawtooth-shaped machined surface provided on the first optical element 31 is 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.

[0046] 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 second recess 4222 of the second holding portion 422 and the protrusion 4234 of the third holding portion 423. At this time, the sawtooth-shaped machined surface provided on the second optical element 32 is 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.

[0047] 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.

[0048] The first operating recess 4231 is a groove formed on the outer circumference of the third retaining portion 423, as shown in Figure 1. Here, the first operating recess 4231 is formed along the outer circumference of the third retaining portion 423. As shown in Figure 3, the first operating recess 4231 is provided for the movement of the operating projection 51, which will be described later. The first operating recess 4231 rotates the second rotating operating portion 42 relative to the cover body 50a.

[0049] The second operating recess 4232 is a groove provided on the outer circumference of the third holding portion 423, as shown in Figure 1. Specifically, an operating projection 51 provided on the inner surface of the cover body 50a is fitted into the second operating recess 4232 so that the second rotating operating portion 42 can rotate. The second operating recess 4232 is connected to the first operating recess 4231 in the vertical direction. There are two second operating recesses 4232 on the outer circumference of the third holding portion 423. Note that only one second operating recess 4232 is shown in Figure 1, and the other is provided at a position point-symmetric with respect to the optical axis of the light source 10.

[0050] Here, when the second rotation operation unit 42 is rotated along the first operation recess 4231 so that the operation projection 51 passes through it, 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 of the light emitted from the light source 10. Note that the object rotated by the second rotation operation unit 42 is not limited to the first optical element 31 and the second optical element 32. The object rotated by the second rotation operation unit 42 may be at least one of the light source 10 and the condensing lens 20 combined. Alternatively, a groove may be formed in the first holding part 421 so that the first support column 414 can move in the circumferential direction, and the first rotation operation unit 41 may be rotated in the circumferential direction of the first holding part 421 inside the lighting fixture 1. Alternatively, the first rotation operation unit 41, the first optical element 31, and the second optical element 32 may be combined and rotated in the circumferential direction of the first holding unit 421 using an axis along the optical axis direction (vertical direction) of the light source 10 as the axis of rotation. Furthermore, the amount of rotation of the first optical element 31 and the second optical element 32 is not limited to being the same.

[0051] (2.2) Cover body (position control section) As shown in Figure 1, the cover body 50a, which serves as the positioning unit 50, is formed in a bottomed cylindrical shape with an open bottom and houses the lighting device 80. A flange portion 501 that protrudes outward is formed around the entire circumference of the open end edge of the cover body 50a.

[0052] As shown in Figure 3, the positioning section 50 (cover body 50a) has two operating protrusions 51. The two operating protrusions 51 are formed at opposing positions on the circumferential surface of the cover body 50a where there is no cover body 50a. 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.

[0053] 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. The fitting of the two operating protrusions 51 into the first operating recess 4231 allows the second rotation operating portion 42 to rotate relative to the position operating portion 50. In other words, the operating protrusions contribute to the second rotation operating portion 42 performing its second rotation function.

[0054] Furthermore, the cover body 50a can serve as a fixing device for, for example, fixing to the ceiling. Specifically, the lighting fixture 1 is attached to the ceiling by inserting the cover body 50a, which houses the lighting device 80, into a recessed hole formed in the ceiling of the facility, and then sandwiching the ceiling material between a pair of mounting springs (not shown) and the flange portion 501 of the cover body 50a. Note that the location for fixing the cover body 50a is not limited to the ceiling. The location for fixing the cover body 50a may be the floor or the wall.

[0055] The position control unit 50 has the function of moving the focusing lens 20 in the optical axis direction of the light source 10. In other words, the position control unit 50 makes it possible to adjust the range of light emitted by the lighting fixture 1 by adjusting the distance between the light source 10 and the focusing lens 20.

[0056] (3) Operation Here, the operation of the first rotation control unit 41 and the second rotation control unit 42 will be explained using Figures 7 to 10.

[0057] First, let's explain the first rotation operation unit 41. The first rotation operation unit 41 linearly changes the direction of the light emitted from the lighting device 80, for example, as shown in Figure 9.

[0058] 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 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 each control surface 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°. 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).

[0059] 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).

[0060] As described above, as shown in Figure 9, 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 can be changed linearly in response to the operation of the first rotation operation unit 41.

[0061] Light emitted from the light source 10 passes through the control surface 301 included in the optical element 30, and is refracted, thereby changing the direction of illumination.

[0062] Next, the second rotational operation unit 42 will be explained. As shown in Figure 10, by operating the second rotational operation unit 42, the direction of light irradiation is changed along the circumferential direction centered on the optical axis, while maintaining the angle with respect to the optical axis of the light source 10. In other words, the rotational operation of the second rotational operation unit 42 makes it possible to mechanically change the direction of light irradiation emitted from the light source 10 360 degrees in the circumferential direction.

[0063] According to the lighting fixture 1 of this embodiment, as shown in Figures 9 and 10, by combining the first rotary operation unit 41 and the second rotary operation unit 42, it becomes possible to freely adjust the direction of illumination of the light emitted from the light source 10, similar to a universal downlight.

[0064] (4) Advantages As described above, the lighting fixture 1 of this embodiment comprises a light source 10, a pair of optical elements 30, and an operating unit 40. The light source 10 emits light. The pair of optical elements 30 are arranged side by side along the optical axis of the light source 10 and have the function of bending the light emitted from the light source 10 in a predetermined direction. The operating unit 40 has a first rotation function that rotates each of the pair of optical elements 30 by the same amount in opposite directions with the axis along the optical axis as the axis of rotation, and a second rotation function that rotates both of the pair of optical elements 30 by the same amount in the same direction with the axis along the optical axis as the axis of rotation, thereby adjusting the rotation of the pair of optical elements 30.

[0065] With this configuration, the pair of optical elements 30 that refract the light emitted from the light source 10 can be mechanically adjusted by the operating unit 40. In other words, the user can determine the direction of illumination more intuitively.

[0066] (5) Variant The following lists some modifications. These modifications can be applied in appropriate combination with the above embodiment. The modifications will be explained below using Figures 11 to 17.

[0067] (5.1) Variation 1 In the above embodiment, the amount by which the pair of optical elements 30 are rotated in the first rotation function is the same, but the embodiment is not limited to this configuration. The amount by which the pair of optical elements 30 are rotated in the first rotation function is not limited to the same amount. The amount by which the pair of optical elements 30 are rotated in the first rotation function may be different.

[0068] (5.2) Variation 2 In the above embodiment, the second operating recess 4232 is provided in two locations on the outer circumference of the third holding portion 423, but the embodiment is not limited to this configuration. Also, the cover body 50a is configured to have two operating protrusions 51, but the embodiment is not limited to this configuration. The main role of the second operating recess 4232 and the operating protrusions 51 is to combine the second rotation operating portion 42 and the position operating portion 50. In other words, any configuration is acceptable as long as the second rotation operating portion 42 and the position operating portion 50 can be combined. For example, the second operating recess 4232 may be provided in three locations on the outer circumference of the third holding portion 423, and the cover body 50a may have three operating protrusions 51.

[0069] (5.3) Modification 3 In the above embodiment, the first optical element 31 and the second optical element 32 are configured to rotate in opposite directions from each other by the mechanism of the first rotation operation unit 41 when the user rotates the first support column 414, but the configuration is not limited to this.

[0070] The first optical element 31 and the second optical element 32 may be configured such that the user directly rotates at least one of them, causing the first optical element 31 and the second optical element 32 to rotate in opposite directions from the mechanism of the first rotation operation unit 41.

[0071] For example, if the first optical element 31 is rotated clockwise when viewed from above, with the axis of rotation aligned with the optical axis direction (vertical direction) of the light source 10, the first gear section 43 rotates counterclockwise when viewed from above, with the axis of rotation aligned with the optical axis direction (vertical direction) of the light source 10.

[0072] When the first gear section 43 rotates counterclockwise when viewed from above, with the axis of rotation aligned with the optical axis direction (vertical direction) of the light source 10, the second gear section 44 rotates clockwise when viewed from above, with the axis of rotation aligned with the optical axis direction (vertical direction) of the light source 10.

[0073] When the second gear section 44 rotates clockwise when viewed from above, with the axis of rotation aligned with the optical axis direction (vertical direction) of the light source 10, the second optical element 32 rotates counterclockwise when viewed from above, with the axis of rotation aligned with the optical axis direction (vertical direction) of the light source 10.

[0074] Alternatively, the first optical element 31 and the second optical element 32 may be configured to rotate in opposite directions by the user indirectly rotating at least one of the first optical element 31 and the second optical element 32 using an operating unit different from the first rotation operating unit 41.

[0075] In other words, the first rotation function may be a function that transmits a first rotational force to one of the pair of optical elements 30 as a second rotational force that rotates in the opposite direction to the other optical element 30.

[0076] Here, the first rotational force is the force that directly or indirectly rotates one of the pair of optical elements 30. In modified example 3, one optical element 30 corresponds to the first optical element 31. The other optical element 30 corresponds to the second optical element 32. Alternatively, one optical element 30 may correspond to the second optical element 32, and the other optical element 30 may correspond to the first optical element 31. In this case, the force with which the user directly or indirectly rotates the second optical element 32 becomes the first rotational force. The first rotational force is transmitted to the first optical element 31 through the first gear section 43 and the second gear section 44 as a second rotational force, which is a force in the opposite direction to the first rotational force.

[0077] (5.4) Modification 4 In the above embodiment, the first optical element 31 and the second optical element 32 are configured to rotate in opposite directions from each other by the mechanism of the first rotation operation unit 41 when the user rotates the first support column 414, but the configuration is not limited to this.

[0078] The first optical element 31 and the second optical element 32 may be configured to rotate in opposite directions relative to each other by the user rotating the second gear section 44, due to the mechanism of the first rotation operation section 41.

[0079] For example, when the second gear section 44 is rotated clockwise when viewed from above, with the axis of rotation aligned with the optical axis direction (vertical direction) of the light source 10, the second optical element 32 and the first gear section 43 rotate counterclockwise when viewed from above, with the axis of rotation aligned with the optical axis direction (vertical direction) of the light source 10. When the first gear section 43 rotates counterclockwise when viewed from above, with the axis of rotation aligned with the optical axis direction (vertical direction) of the light source 10, the first optical element 31 rotates clockwise when viewed from above, with the axis of rotation aligned with the optical axis direction (vertical direction) of the light source 10.

[0080] In other words, in response to the operation of the second gear section 44, the first optical element 31 and the second optical element 32 rotate in opposite directions to each other.

[0081] (5.5) Variation 5 In the above embodiment, the first rotation operation unit 41 is configured to be operated directly, but the embodiment is not limited to this. The operation unit 40 may further include an operation receiving unit that receives rotational operations on the pair of optical elements 30. The first rotation operation unit 41 (rotation operation unit) rotates each of the pair of optical elements 30 in opposite directions to each other in response to operations on the operation receiving unit.

[0082] The operation receiving section is, for example, a dial or a lever. In other words, the operation receiving section has the function of providing a more intuitive understanding of the first rotation function of the first rotation operating section 41 and assisting in its operation. Specifically, in response to the operation of the operation receiving section, the first rotation operating section 41 can change the direction of the light emitted by the lighting fixture 1.

[0083] (5.6) Variation 6 The position control unit 50 is configured to adjust the position of the focusing lens 20 in the optical axis direction (vertical direction) of the light source 10, but is not limited to this configuration.

[0084] The condensing lens 20, the first optical element 31, and the second optical element 32 may be configured to be adjusted together in the optical axis direction (vertical direction) of the light source 10.

[0085] In other words, the positioning unit 50 moves at least the condensing lens 20, which is part of the condensing lens 20 and the pair of optical elements 30 (first optical element 31, second optical element 32), in the optical axis direction of the light source 10.

[0086] (5.7) Variation 7 The optical elements used in the first optical element 31 and the second optical element 32 are configured to be positioned with their processed surfaces facing upwards, but the configuration is not limited to this.

[0087] The machined surface of the first optical element 31 may be positioned facing downwards. The machined surface of the second optical element 32 may be positioned facing downwards, as shown in Figure 11. The machined surfaces of both the first optical element 31 and the second optical element 32 may be positioned facing downwards, as shown in Figure 12.

[0088] (5.8) Variation 8 The optical elements used in the first optical element 31 and the second optical element 32 are configured to be disc-shaped, with a sawtooth-like pattern applied to one of the two surfaces in the thickness direction (vertical direction), but the configuration is not limited to this.

[0089] Triangular prisms may be used as optical elements for the first optical element 31 and the second optical element 32. As shown in Figure 13, third optical element 31a and fourth optical element 32a, which are formed in a disc shape and have a sawtooth pattern on both sides in the thickness direction (vertical direction), may also be used as optical elements for the first optical element 31 and the second optical element 32.

[0090] (5.9) Variation 9 In the above embodiment, the optical elements used in the first optical element 31 and the second optical element 32 are formed in a disc shape, as shown in Figure 2, and have a sawtooth-like processing on one of the two surfaces in the thickness direction (up and down direction). Light emitted from the light source 10 and focused by the focusing lens 20 passes through the control surfaces 301, connection surfaces 302, and base bottom surfaces 303 of the first optical element 31 and the second optical element 32, and is refracted, thereby determining the irradiation range or irradiation direction. Therefore, in the above embodiment, the irradiation direction of the light that passes through the control surfaces 301 and base bottom surfaces 303 of the light emitted from the light source 10 and focused by the focusing lens 20 is controllable.

[0091] Light passing through the connection surface 302 undergoes total internal reflection, resulting in light that is emitted in a different direction than the light that passed through the control surface 301 and the base bottom surface 303.

[0092] Therefore, processing may be applied to the first optical element 31 and the second optical element 32 to eliminate light that has passed through the connection surface 302.

[0093] For example, as shown in Figure 14, the connection surface 302 may be treated to reflect light. Specifically, a light-shielding plate 304 may be provided on the connection surface 302. Alternatively, the connection surface 302 may be treated to absorb light. Specifically, the connection surface 302 may be painted black.

[0094] Furthermore, as shown in Figure 15, the connecting surface 302 may be given a textured finish. By giving the connecting surface 302 a textured finish, the light passing through the connecting surface 302 is diffused. The textured finish on the connecting surface 302 may be a textured finish or a dimpled finish.

[0095] Furthermore, as shown in Figure 16, the base bottom surface 303 may be given a textured finish. By giving the base bottom surface 303 a textured finish, the light that passes through the connecting surface 302 and then through the base bottom surface 303 is diffused. The textured finish on the base bottom surface 303 may be a textured finish or a dimpled finish.

[0096] (5.10) Variation 10 In the above embodiment, a drive unit 60 for driving the operating unit 40 may be further provided.

[0097] As shown in Figure 17, the drive unit 60 is configured to be included in the lighting fixture 1, but is not limited to this configuration. The drive unit 60 may be located in the lighting device 80, in the operating unit 40, or outside the lighting fixture 1. The drive unit 60 is capable of driving the operating unit 40. The drive unit 60 is, for example, a drive device such as a motor.

[0098] (summary) As described above, the lighting fixture (1) of the first embodiment comprises a light source (10), a pair of optical elements (30), and an operating unit (40). The light source (10) emits light. The pair of optical elements (30) are arranged side by side along the optical axis of the light source (10) and have the function of bending the light emitted from the light source (10) in a predetermined direction. The operating unit (40) has a first rotation function that rotates each of the pair of optical elements (30) by the same amount in opposite directions with respect to an axis along the optical axis, and a second rotation function that rotates both of the pair of optical elements (30) by the same amount in the same direction with respect to an axis along the optical axis, thereby adjusting the rotation of the pair of optical elements (30).

[0099] In this embodiment, a pair of optical elements (30) that refract light emitted from the light source (10) can be mechanically adjusted by the operating unit (40). In other words, the user can determine the direction of illumination more intuitively.

[0100] In the lighting fixture (1) of the second embodiment, the first rotation function is a function that transmits a first rotational force to one of the pair of optical elements (30) as a second rotational force that rotates in the opposite direction to the other optical element (30).

[0101] According to this embodiment, the force that rotates one of the pair of optical elements (30) can be transmitted as a force that rotates the other optical element (30).

[0102] In the third embodiment of the lighting fixture (1), in the second embodiment, the first rotational force is a force that directly or indirectly rotates one of the pair of optical elements (30).

[0103] According to this embodiment, a rotational force can be applied to one of the pair of optical elements (30) by directly or indirectly rotating one of the optical elements (30).

[0104] In the fourth embodiment of the lighting fixture (1), in the first embodiment, the first rotation function is a function that rotates each of the pair of optical elements (30) in opposite directions to each other in response to the operation of the operating unit (40).

[0105] According to this embodiment, by operating the operating unit (40), each of the pair of optical elements (30) can be rotated in opposite directions.

[0106] In the fifth embodiment of the lighting fixture (1), as in the fourth embodiment, the operating unit (40) has a rotary operating unit (for example, a first rotary operating unit 41) and an operating receiver. The rotary operating unit has a first rotary function. The operating receiver receives a rotational operation of a pair of optical elements (30). The rotary operating unit rotates each of the pair of optical elements (30) in opposite directions to each other in response to the operation on the operating receiver.

[0107] According to this embodiment, the first rotation operation unit (41) can rotate the pair of optical elements (30) in response to an operation on the operation reception unit.

[0108] The luminaire (1) of the sixth embodiment further comprises a holding part (42a) in any of the first to fifth embodiments. The operating part (40) includes the holding part (42a). The holding part (42a) holds a pair of optical elements (30) and rotates about an axis along the optical axis direction, and has a second rotation function. Both of the pair of optical elements (30) rotate in the same direction by the same amount as the holding part (42a) rotates.

[0109] According to this embodiment, the holding portion (42a) included in the operating portion (40) can rotate both of the pair of optical elements (30) in the same direction by the same amount.

[0110] The lighting fixture (1) of the seventh embodiment further comprises a drive unit (60) in any of the first to sixth embodiments. The drive unit (60) drives the operating unit (40).

[0111] According to this embodiment, the drive unit (60) can drive the operating unit (40).

[0112] In the luminaire (1) of the eighth embodiment, a condensing lens (20) is placed between a pair of optical elements (30) and a light source (10) in any of the first to seventh embodiments. The luminaire (1) further comprises a position operating unit (50). The position operating unit (50) moves at least the condensing lens (20), of the condensing lens (20) and the pair of optical elements (30), in the optical axis direction of the light source (10).

[0113] According to this embodiment, the positioning unit (50) can move at least the condensing lens (20) of the condensing lens (20) and the pair of optical elements (30) in the optical axis direction of the light source (10).

[0114] In the luminaire (1) of the ninth embodiment, in any of the first to eighth embodiments, the operating section (40) includes a first rotary operating section (41) and a second rotary operating section (42). The first rotary operating section (41) has a first rotary function. The second rotary operating section (42) has a second rotary function.

[0115] According to this embodiment, the operating unit (40) may include a first rotation operating unit (41) having a first rotation function and a second rotation operating unit (42) having a second rotation function.

[0116] In the 10th embodiment of the lighting fixture (1), in the first to 9th embodiments, both of the pair of optical elements (30) have the same angle of emitted light with respect to incident light.

[0117] According to this embodiment, the optical elements (30) used in a pair of optical elements (30) can be optical elements whose angle of emitted light relative to incident light is the same. [Explanation of Symbols]

[0118] 1 Lighting fixtures 10 light source 20 Focusing lenses 30 Optical elements 40 Control section 41 First Rotation Control Section 42 Second Rotation Control Section 42a Holding part 50 Position operation section 60 Drive unit

Claims

1. A light source that emits light, A pair of optical elements arranged side by side along the optical axis of the light source and having the function of bending the light emitted from the light source in a predetermined direction, It comprises an operating unit for adjusting the rotation of the pair of optical elements, The aforementioned operating unit is A first rotation function that rotates each of the pair of optical elements by the same amount in opposite directions, with the axis along the optical axis as the axis of rotation, The pair of optical elements have a second rotation function that rotates both of them by the same amount in the same direction, with the axis along the optical axis being the axis of rotation, Lighting fixtures.

2. The first rotation function is a function that transmits a first rotational force applied to one of the pair of optical elements as a second rotational force that rotates the other optical element in the opposite direction. The lighting fixture according to claim 1.

3. The first rotational force is a force that directly or indirectly rotates one of the pair of optical elements. The lighting fixture according to claim 2.

4. The first rotation function is a function that rotates each of the pair of optical elements in opposite directions to each other in response to the operation of the operating unit. The lighting fixture according to claim 1.

5. The operating unit comprises a rotation operating unit having the first rotation function and an operating receiving unit that receives rotational operations of the pair of optical elements. The rotation operation unit rotates each of the pair of optical elements in opposite directions in response to an operation on the operation receiving unit. The lighting fixture according to claim 4.

6. The holding part further comprises a second rotation function which holds the pair of optical elements and rotates the axis along the optical axis with respect to the axis of rotation, The operating section includes the holding section, Both of the pair of optical elements rotate in the same direction by the same amount as the holding portion rotates. A lighting fixture according to any one of claims 1 to 5.

7. The system further includes a drive unit for driving the aforementioned operating unit. A lighting fixture according to any one of claims 1 to 5.

8. A condensing lens is disposed between the pair of optical elements and the light source, The system further includes a positioning unit that moves at least the condensing lens among the condensing lens and the pair of optical elements in the optical axis direction of the light source. A lighting fixture according to any one of claims 1 to 5.

9. The operating unit includes a first rotation operating unit having the first rotation function and a second rotation operating unit having the second rotation function. A lighting fixture according to any one of claims 1 to 5.

10. Both of the pair of optical elements have the same angle of emitted light relative to incident light. A lighting fixture according to any one of claims 1 to 5.

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