JP7217456B2 - lighting equipment - Google Patents

Description

The present disclosure relates to lighting devices.

2. Description of the Related Art Conventionally, there is one described in Patent Document 1 as a lighting device. This illumination device includes a base, a light source module, a first cylindrical member, a second cylindrical member, a lens holder, and a lens. The base constitutes the upper side of the housing and has a plurality of fins on the side opposite to the light emitting side. Further, the light source module is fixed to the end face (principal face) of the base on the light emitting side, and emits light to the side opposite to the fin side in the optical axis direction. The first cylindrical member is fixed to the base so as not to be relatively movable, and the second cylindrical member is attached to the first cylindrical member so as to be relatively movable in the optical axis direction. The second cylindrical member changes its height position with respect to the first cylindrical member when it rotates with respect to the first cylindrical member. The lens holder constitutes the lower side of the housing of the illumination device, and is fixed to the outside in the radial direction of the second cylindrical member so as not to move relative to it. The lens is fixed inside the lens holder so as not to move relative to it. The lens is positioned closer to the light exit side than the light source module in the optical axis direction. In this lighting device, by rotating the first cylindrical member with respect to the second cylindrical member, the height position of the lens holder with respect to the light source module can be changed, so the position of the lens in the optical axis direction with respect to the light source module can be adjusted. can. Therefore, light distribution adjustment of emitted light can be performed.

Japanese Patent No. 6159460

In the lighting device described above, when the second cylindrical member is rotated with respect to the first cylindrical member in order to change the position of the lens in the optical axis direction with respect to the light source module, the end position of the second cylindrical member is aligned with the end position of the first cylindrical member. It fluctuates so as to protrude from the part. Therefore, since the dimension of the lighting device in the optical axis direction varies, the lighting device tends to be large-sized and does not look good.

Accordingly, an object of the present disclosure is to provide a lighting device that can perform light distribution adjustment, is easy to realize compactness, and is excellent in beauty.

A lighting device according to the present disclosure includes a housing, a light source arranged in the housing, and a lens arranged in the housing on the light emission side of the light source, and is relatively to a stationary part that is stationary with respect to the light source. A rotatable optical block, and a rotating member whose position in the optical axis direction remains substantially unchanged and which is rotatable with respect to the stationary part, the optical block having a guide groove, and the stationary part having and an engaging portion that is fitted in the guide groove and changes its position in the guide groove when the rotating member rotates with respect to the stationary portion.

According to the lighting device according to the present disclosure, light distribution can be adjusted, compactness can be easily achieved, and aesthetic appearance is excellent.

1 is a perspective view of a lighting device according to an embodiment of the present disclosure; FIG. It is a bottom view of an illuminating device. 1 is an exploded perspective view of the main components of a lighting device; FIG. FIG. 4 is a perspective view showing a light source module arranged on a pedestal portion of the base of the lighting device; It is a sectional view parallel to the optical axis direction in an illuminating device. 4 is an exploded perspective view of an optical block and a rotating member; FIG. It is an assembly perspective view of an optical block. It is an assembly perspective view of an optical block and a rotation member. 4 is a perspective view for explaining movement of an optical block with respect to a rotating member; FIG. FIG. 8 is a perspective view similar to FIG. 7 showing a modification of the lens holder; It is a figure which shows the modification of the engaging part which engages with the guide groove of a lens holder.

Embodiments according to the present disclosure will be described in detail below with reference to the accompanying drawings. When a plurality of embodiments, modifications, etc. are included below, it is assumed from the beginning to construct a new embodiment by appropriately combining those characteristic portions. Further, in the following embodiments, the same reference numerals are given to the same configurations in the drawings, and overlapping descriptions are omitted. In addition, the dimensional ratios of length, width, height, etc. of each member do not necessarily match between different drawings. In the drawings and the following description, the optical axis direction is the direction along the optical axis of the light emitted from the lighting device, the radial direction is the radial direction orthogonal to the optical axis, and the circumferential direction is the direction around the optical axis. is the circumferential direction of The optical axis direction also coincides with the extending direction of the central axis of the lens, and also coincides with the up-down direction and height direction when the lighting device is installed on the ceiling and directed vertically downward. Further, in the following description, the upper side refers to the side opposite to the light emission side in the optical axis direction, and the lower side refers to the light emission side in the optical axis direction. In addition, among the constituent elements described below, constituent elements that are not described in independent claims indicating the highest concept are optional constituent elements and are not essential constituent elements.

FIG. 1 is a perspective view of a lighting device 1 according to one embodiment of the present disclosure. In FIG. 1, an optical axis L of light emitted from the lighting device 1 is indicated by a dashed line. FIG. 2 is a bottom view of the illumination device 1. FIG. As shown in FIG. 1, the illumination device 1 is a recessed universal downlight, which is embedded in the ceiling of a building such as a hall, and can change the optical axis direction of downwardly emitted light.

The lighting device 1 includes a base 10 . The base 10 constitutes the upper side of the housing of the lighting device 1 and has a bottomed cylindrical portion 11 . The base 10 functions as a mount for mounting the light source 62 (see FIG. 4) inside the bottomed cylindrical portion 11 . The base 10 has a plurality of fins 12 protruding upward, and the entire base also functions as a heat sink for dissipating heat generated by the light source 62. In particular, the fins 12 dissipate the heat from the light source 62 to the outside air. . Therefore, it is preferable that the base 10 is made of a material with high thermal conductivity such as a metal material. The base 10 is configured by integrally molding the bottomed cylindrical portion 11 and the fins 12 with, for example, aluminum die casting. Note that the base may be configured to join the bottomed cylindrical portion and the fins. In this case, for example, the bottomed cylindrical portion and the fins may be connected by inserting the projections provided on the bottomed cylindrical portion into the holes provided in the fins and then plastically deforming them, or alternatively, the fins may be connected to the bottomed cylindrical portion. may be fastened and fixed to the bottomed cylindrical portion with screws. Note that the base may not have fins.

The illumination device 1 further includes a spring mounting member 15 , an optical axis adjusting member 17 and a frame 20 . Each of the spring mounting member 15, the optical axis adjusting member 17, and the frame 20 is preferably made of a metal material such as aluminum or a resin material such as polybutylene terephthalate. The base 10, the spring mounting member 15, the optical axis adjusting member 17, and the frame 20 are integrated as follows.

As shown in FIG. 1, the spring mounting member 15 includes an annular flat plate portion 15a and two spring mounting portions 15b. It protrudes downward from the annular flat plate portion 15a. Further, the frame 20 is a cylindrical member forming the lower side of the housing, and includes an annular disk-shaped upper end surface (not shown). 1 and 2, the optical axis adjusting member 17 includes an annular flat plate portion 17a, an upper base fixing portion 17b, and a lower base fixing portion 17c. , project upward from the annular flat plate portion 17a, while the lower base fixing portion 17c projects downward from the annular flat plate portion 17a.

With reference to FIG. 1, the annular flat plate portion 15a of the spring mounting member 15 and the upper end surface of the frame 20 sandwich the annular flat plate portion 17a of the optical axis adjusting member 17, and the annular flat plate portion 15a is attached to the frame body 20. is fixed with a screw 27 to the upper end face of the . By this fixation, the spring mounting member 15, the optical axis adjusting member 17, and the frame 20 are integrated. The upper base fixing portion 17b has an elongated hole 17d, and the lower base fixing portion 17c has a screw insertion hole. The base 10 is screwed to the frame 20 using the long holes 17d of the upper base fixing portion 17b and the screw insertion holes of the lower base fixing portion 17c.

As shown in FIG. 1, when the extending direction of the central axis of the frame 20 substantially coincides with the direction of the optical axis, the base 10 is fastened to the central portion of the elongated hole 17d in the plane of the paper with the screw 21. there is The base 10 inclines with respect to the frame 20 as the tightening position of the screw 21 moves to the left or right of the long hole 17d in the drawing. As a result, the optical axis direction of the illumination device 1 can be oriented at a desired angle with respect to the central axis direction of the frame 20 along the vertical direction, for example.

The lighting device 1 further comprises two mounting springs 23 . The two mounting springs 23 are arranged on the outer side of the frame so as to face each other in the radial direction of the frame 20 with the central axis interposed therebetween, and each mounting spring 23 is fixed to the spring mounting portion 15b. The mounting spring 23 is made of, for example, a metal plate having a bent portion, and has a plate spring structure. The mounting spring 23 is distorted so that the mounting spring 23 abuts around the embedded hole in the ceiling. Thereby, the lighting device 1 is fixed to the inner surface of the embedded hole of the ceiling by the mounting spring 23 .

Since the spring attachment portion 15b is attached to the frame 20, it is stationary with respect to the frame 20 and is also stationary with respect to the embedding hole of the ceiling. Therefore, since the frame 20 is stationary with respect to the embedding hole, the base 10 whose tilt angle can be adjusted with respect to the frame 20 can be tilted at a desired angle with respect to the ceiling. Therefore, the optical axis L of the emitted light emitted from the light source 62 (see FIG. 4) fixed to the base 10 can be tilted at a desired angle with respect to the vertical direction, thereby significantly increasing the degree of freedom of the irradiation area. can be as high as Note that three or more attachment springs may be provided. Moreover, the structure for mounting the lighting device on the ceiling may be any structure as long as it is capable of fixing the lighting device to the ceiling, and does not need to include a mounting spring.

The illumination device 1 can change the position of the lens in the optical axis direction with respect to the light source, and can adjust the distribution of emitted light. Next, this matter will be explained. FIG. 3 is an exploded perspective view of the main components of the lighting device 1. FIG. In FIG. 3, illustration of the frame 20, the mounting spring 23, and the like is omitted. 4 is a perspective view showing the light source module 60 arranged on the pedestal portion 24 of the base 10, and FIG. 5 is a cross-sectional view parallel to the optical axis direction of the illumination device 1. As shown in FIG.

As shown in FIG. 3 , the illumination device 1 includes a lens 30 , a lens holder 40 , a rotating member 50 and a light source module 60 in addition to the base 10 and the frame 20 . The light source module 60 is fixed by screws 63 to the base portion 24 corresponding to the bottom portion of the bottomed cylindrical portion 11 of the base 10 , and has a substrate 61 and a light source 62 . The substrate 61 has a substantially rectangular shape in a plan view, and the light source 62 has a disk-like shape and is arranged substantially in the center of the lower surface (mounting surface) of the substrate 61 . The light source module 60 has, for example, a COB (Chip On Board) structure, and the light source 62 includes a plurality of LEDs (light emitting diodes) mounted on a substrate 61 and a sealing member that seals the plurality of LEDs. .

The substrate 61 is composed of, for example, a ceramic substrate, a resin substrate, or a metal base substrate. A pair of electrode terminals 64a and 64b and a predetermined pattern of metal wiring (not shown) are formed on the substrate 61 . A pair of electrode terminals 64a and 64b are provided for externally receiving DC power for causing the LED of the light source 62 to emit light. Moreover, the metal wiring of a predetermined pattern is provided for electrically connecting the LEDs.

An LED is an example of a light emitting device. The LED is composed of, for example, a bare chip that emits monochromatic visible light, and is composed of a blue LED chip that emits blue light when energized. A plurality of LEDs are arranged on the substrate 61 in, for example, a matrix. Note that only one LED may be mounted on the substrate. The sealing member is made of, for example, translucent resin and contains a phosphor. The phosphor serves to wavelength convert the light from the LED. The sealing member is made of, for example, phosphor-containing resin in which phosphor particles are dispersed in silicone resin. If the light source module 60 emits white light and the LED is a blue LED chip that emits blue light, the phosphor particles are made of, for example, a YAG-based yellow phosphor.

The sealing member may, for example, collectively seal all the LEDs, may seal a plurality of LEDs in a line for each row, or may seal each LED individually. good too. Also, the light source may be composed of a light-emitting element other than an LED, or may be composed of a solid-state light-emitting element such as a semiconductor laser element, an organic EL (Electro Luminescence) element, or an inorganic EL element. Alternatively, the light source may consist of an incandescent lamp or a fluorescent lamp.

As shown in FIG. 4, substrate 61 is fixed to substrate holder 65 . The substrate holder 65 has a substantially rectangular outer shape in plan view, and is preferably made of, for example, a resin member. The substrate 61 is fixed to the substrate holder 65 by adhesion, sandwiching, or the like, and the substrate holder 65 is fixed to the pedestal portion 24 of the base 10 by screws 63 .

Further, as shown in FIGS. 3 and 4, the board holder 65 is provided with an engaging portion 66 . In this embodiment, two engaging portions 66 are formed integrally with the substrate holder 65 . The substrate holder 65 has a rectangular shape in a plan view, and is formed at the central portions of two short side edges. The engaging portion 66 is formed as a claw-like portion having a substantially L-shaped side surface when viewed from the direction orthogonal to the optical axis direction. More specifically, the engaging portion 66 protrudes from the surface of the substrate holder 65 toward the light emitting side, and has a shape in which the tip is bent outward in a direction orthogonal to the optical axis direction. The tip of the engaging portion 66 is fitted into and engaged with a guide groove of the lens holder 40, which will be described later. Since the substrate holder 65 is a stationary portion fixed to the base 10 , the engaging portion 66 of the substrate holder 65 also constitutes a stationary portion stationary with respect to the light source 62 fixed to the base 10 .

Referring to FIG. 5, lens 30 is arranged on the light exit side of light source module 60 with respect to the optical axis direction. More precisely, the end face 35 on the light incident side in the optical axis direction of the lens 30 is located on the light emitting side in the optical axis direction with respect to the light source 62 . Further, the lens holder 40 is arranged so as to surround the lens 30 , and the rotary member 50 is arranged so as to surround the lens holder 40 .

6 is an exploded perspective view of the optical block 70 and the rotating member 50. FIG. 7 is an assembled perspective view of the optical block 70. FIG. 8 is an assembled perspective view of the optical block 70 and the rotating member 50. FIG.

As shown in FIG. 5 , the illumination device 1 has an optical block 70 . The optical block 70 is composed of a lens 30 and a lens holder 40 that holds the lens 30, as shown in FIGS.

The lens 30 is made of a translucent material having translucency, and is preferably made of a transparent resin material such as acrylic, polycarbonate, or silicone, or a glass material. The lens 30 includes a concave portion 31 including a cylindrical space in the center of the upper portion, an outer peripheral surface 32 that widens in a truncated cone shape from the upper end to the lower end, and a flange portion 33 that protrudes radially outward at the lower end of the outer peripheral surface 32. and A plurality of (three in the present embodiment, two of which are shown in FIG. 6) fitting portions 34 are formed radially inwardly of the flange portion 33 at intervals in the circumferential direction. A notch portion 36 extending radially inward is formed in the fitting portion 34 .

As shown in FIG. 6, the lens holder 40 is an annular member and is arranged to surround the lens 30 . The lens holder 40 is preferably made of a metal material such as aluminum or a resin material such as polybutylene terephthalate. The lens holder 40 has a frusto-conical outer peripheral surface 41 extending along the radially outer side of the outer peripheral surface 32 of the lens 30 . At the lower end of the outer peripheral surface 41, a plurality of (three in this embodiment) fitting protrusions 42 are formed at intervals in the circumferential direction so as to protrude in the optical axis direction. A locking projection 43 is formed on the radially inner surface of the fitting convex portion 42 . When the lens holder 40 is assembled to the lens 30, the locking protrusion 43 is fitted into the notch 36 formed in the fitting portion 34 of the lens 30, thereby allowing the lens 30 to move from the lens holder 40 in the optical axis direction. Performs the function of holding it so that it does not come off.

A guide projection 44 having a rectangular shape in a side view is formed on the radially outer surface of each fitting convex portion 42 of the lens holder 40 . The guide protrusions 44 are fitted into cutouts of the rotating member 50 to be described later, and move within the cutouts to guide the movement of the lens holder 40 along the axial direction of the rotating member 50 .

Further, the lens holder 40 has two arcuate wall portions 45 protruding upward from the upper end surface of the outer peripheral surface 41 . The two arc-shaped wall portions 45 are provided so as to face each other in the radial direction of the lens holder 40 . A guide groove 46 is formed in each arcuate wall portion 45 . The guide groove 46 extends in a direction inclined with respect to a plane orthogonal to the optical axis direction. Each of the guide grooves 46 formed in the two arc-shaped wall portions 45 is formed to have the same height position at positions facing each other in the radial direction.

The rotating member 50 is a substantially cylindrical member and is preferably made of a resin material such as polybutylene terephthalate. The rotating member 50 has an upper end tubular portion 51, an intermediate tubular portion 52, and a grip portion 53 in order from the top. Three notch portions 54 are formed in the upper end cylindrical portion 51 so as to extend in the optical axis direction at intervals in the circumferential direction. The notch 54 is open upward, and can receive the guide projection 44 of the lens holder through the opening. The number of notches 54 may be two or four or more.

The upper cylindrical portion 51 has an inner diameter larger than the maximum diameter of the outer peripheral surface 41 of the lens holder 40 . As a result, the lens holder 40 holding the lens 30 can move in the optical axis direction inside the upper end tube portion 51 .

The intermediate cylindrical portion 52 is formed to have a smaller outer diameter than the upper end cylindrical portion 51 . Therefore, a stepped portion 55 having an annular shape when viewed from below is formed between the upper end tubular portion 51 and the intermediate tubular portion 52 . The stepped portion 55 can be engaged with the annular projecting portion 13a formed on the inner peripheral surface of the bottomed cylindrical portion 11 of the base 10 when the rotating member 50 is arranged in the bottomed cylindrical portion 11 of the base 10. and functions to prevent the rotating member 50 from falling off from the base 10 .

The grip portion 53 is an annular portion projecting radially outward from the lower end portion of the intermediate tubular portion 52 . An uneven shape is formed on the surface of the gripping portion 53 over the entire circumferential direction, thereby making it easier for a person to grip the gripping portion 53 by hand and rotate the rotating member 50 .

A plurality of (four in this embodiment) locking projections 56 are formed at intervals in the circumferential direction near the lower end of the intermediate cylindrical portion 52 . The locking protrusion 56 is formed as a trapezoidal protrusion when viewed from the circumferential direction. A gap is formed between the lower end surface of the locking projection 56 and the upper end surface of the grip portion 53 . This gap is formed so as to protrude radially inward at the lower end of the bottomed cylindrical portion 11 of the base 10 when the rotary member 50 is arranged in the bottomed cylindrical portion 11 of the base 10 as shown in FIG. The flange portion 13b is fitted and arranged. As a result, the rotating member 50 functions to prevent the rotating member 50 from dropping off from the base 10, and the rotating member 50 can rotate with respect to the base 10 without substantially changing its position in the optical axis direction.

As shown in FIG. 7, the optical block 70 is assembled by assembling the lens holder 40 so as to cover the lens 30 from above. In this state, the locking protrusions 43 (see FIG. 6) formed on the fitting projections 42 of the lens holder 40 are fitted into the notches 36 (see FIG. 6) on the fitting portion 34 of the lens 30. As a result, the lens 30 is held so as not to come off from the lens holder 40 in the optical axis direction.

The optical block 70 assembled in this manner is inserted into the upper end cylindrical portion 51 of the rotating member 50 as shown in FIG. At this time, since the maximum diameter portion of the lens holder 40 constituting the optical block 70 is smaller than the inner diameter of the upper end cylindrical portion 51, the optical block 70 and the rotary member 50 are relatively movable in the optical axis direction. When the lens holder 40 relatively moves in this way, the guide protrusion 44 of the lens holder 40 fits into the notch 54 of the rotating member 50 and moves within the notch 54 , so that the optical block 70 is aligned with the optical axis within the rotating member 50 . It can move stably along the direction.

Next, light distribution adjustment in the illumination device 1 will be described with reference to FIG. 9 . 9 is a perspective view for explaining movement of the optical block 70 with respect to the rotating member 50. FIG.

With the illumination device 1 assembled, the substrate holder 65 of the light source module 60 is fixed to the pedestal portion 24 of the base 10 , and the rotary member 50 is attached to the bottomed cylindrical portion 11 of the base 10 . It is rotatable with the optical axis, but is arranged so as not to move in the direction of the optical axis. Further, the engaging portion 66 of the substrate holder 65 is fitted into and engaged with one circumferential end side of the guide groove 46 formed in the arcuate wall portion 45 of the lens holder 40 .

In this state, as shown in FIG. 9, when a person grasps the grip portion 53 and rotates the rotating member 50 in one circumferential direction indicated by an arrow R1, the engaging portion 66 of the substrate holder 65 is moved along the guide groove 46. As a result, the lens holder 40 moves in the arrow Z1 direction, that is, in the direction in which the lens 30 approaches the light source module 60 . As a result, the light distribution angle of the light emitted from the illumination device 1 is increased, and the illumination range is widened. On the contrary, in a state where the engaging portion 66 of the substrate holder 65 is located in the middle area or the other end side of the guide groove 46 in the circumferential direction, a person grasps the grip portion 53 of the rotating member 50 and moves the rotating member 50 as indicated by the arrow R2. , the engaging portion 66 of the substrate holder 65 moves along the guide groove 46, causing the lens holder 40 to move in the direction of arrow Z2, that is, the direction in which the lens 30 separates from the light source module 60. move to As a result, the light distribution angle of the emitted light emitted from the illumination device 1 becomes smaller and the illumination range becomes narrower.

When light distribution is adjusted in the illumination device 1 in this manner, the position of the rotating member 50 relative to the base 10 in the optical axis direction does not change, and the rotating member 50 is attached to the base 10 and the bottomed cylindrical portion 11 does not protrude further from the end of the

In the above description, an example in which the substrate holder 65, which is a stationary part, is provided with the engaging part 66, and the lens holder 40 of the light source module 60, which is a moving part, is provided with the guide groove 46 has been described. not a thing Conversely, guide grooves may be provided in the substrate holder 65 and the base 10, which are stationary portions, and engaging portions may be provided in the light source module 60, which is a moving portion.

As described above, the illumination device 1 of the present embodiment includes the base 10, the light source 62 arranged in the base 10, and the lens 30 arranged in the base 10 closer to the light emission side than the light source 62. , an optical block 70 that is rotatable relative to a stationary portion that is stationary with respect to a light source 62, and a rotating member 50 that is rotatable with respect to the stationary portion and whose position in the optical axis direction remains substantially unchanged. . One of the optical block 70 and the rotary member has a guide groove 46, and the other of the optical block 70 and the rotary member 50 is fitted into the guide groove 46 so that when the rotary member 50 rotates with respect to the stationary portion, the guide groove 46 is not guided. It has an engaging portion whose existing position in the groove 46 varies.

According to this configuration, the light distribution can be adjusted, and the rotating member 50 does not protrude from the base 10. Therefore, it is possible to easily realize compactness and to provide an illumination device excellent in appearance.

In the case of a universal illumination device in which the optical axis direction can be changed in the height direction of the frame, a base on which the lens is fixed when the position of the lens in the optical axis direction is changed as in the conventional art. Suppose that a configuration is adopted in which the length in the optical axis direction of is changed. Then, when the optical axis direction is greatly inclined with respect to the height direction of the frame and when the length of the base is long, the base is likely to interfere with the frame. In order to do so, it becomes necessary to increase the size of the frame, and the illumination device tends to be particularly large. However, in the case of the technology of the present disclosure, even if the illumination device 1 is of a universal type, when the position of the lens 30 in the optical axis direction is changed, the illumination device 1 can be adjusted by simply moving the lens 30 within the rotating member 50 . There is no change in the appearance (dimensions) of the Therefore, when the illumination device 1 is of a universal type, one of the effects of the technology of the present application that the illumination device 1 can be easily made compact becomes particularly remarkable.

In the illumination device 1 of this embodiment, the guide groove 46 is provided in the lens holder 40 of the optical block 70 . This configuration has the advantage of facilitating manufacturing as compared with the case where the guide groove 46 is provided in the base 10, which is the stationary portion.

Further, in the illumination device 1 of the present embodiment, the guide groove 46 is inclined with respect to a plane orthogonal to the optical axis direction. As a result, the rotational movement of the rotating member 50 in the circumferential direction can be easily and reliably converted into the movement movement of the light source module 60 in the optical axis direction.

Further, in the illumination device 1 of this embodiment, the optical block 70 has the lens holder 40 that holds the lens 30 , and the guide groove 46 is provided in the lens holder 40 . This configuration has the advantage of facilitating manufacturing as compared with the case where the guide groove 46 is provided in the lens 30 or the base 10, which is the stationary portion.

In addition, in the illumination device 1 of the present embodiment, the optical block 70 has a guide projection 44 protruding radially outward on the outer peripheral portion, and the rotating member 50 has a notch portion 54 extending in the optical axis direction. When the block 70 moves in the optical axis direction with respect to the rotating member 50 , the guide projection 44 moves along the notch 54 while being fitted in the notch 54 . With this configuration, the optical block 70 can be stably moved within the rotating member 50 along the optical axis direction.

Furthermore, in the illumination device 1 of the present embodiment, the housing includes the base 10 to which the light source 62 is fixed, and the frame 20 arranged on the light emitting side of the base 10, and the height direction of the frame 20 The tilt angle of the optical axis direction with respect to may be variable. According to this configuration, by changing the inclination angle of the optical axis direction, the light emission direction can be changed, and the lighting direction of the lighting device 1 can be easily changed.

FIG. 10 is a perspective view similar to FIG. 7 showing a modification of the lens holder. As shown in FIG. 10, the lens holder 40A has two arc-shaped wall portions 45a, and guide grooves 46 are respectively formed in the arc-shaped wall portions 45a. It is formed so as to extend along the circumferential direction without being inclined with respect to the orthogonal plane. Other configurations are the same as those of the lens holder 40 described above. In this case, even if the rotating member 50 is rotated while the engaging portion 66 of the substrate holder 65 is engaged with the guide groove 46, the position of the light source module 60 including the lens 30 and the lens holder 40A in the optical axis direction does not change. , only the rotational position of the lens 30 changes. In this case, by using a lens having prism performance, it is possible to change the light emission direction or the illumination direction by rotating the lens.

FIG. 11 is a view showing a modification of the engaging portion that engages with the guide groove 46 of the lens holder 40. As shown in FIG. Although an example in which the substrate holder 65 of the light source module 60 is provided with the engaging portion 66 that fits into the guide groove 46 of the lens holder 40 has been described above, the present invention is not limited to this. For example, as shown in FIG. 11, an engaging member 66A may be attached through the bottomed cylindrical portion 11 of the base 10 from the outside to engage with the guide groove 46 of the lens holder 40, or alternatively, an engaging member 66A may be attached. An engaging portion protruding from the inner surface of the bottom cylindrical portion 11 may be formed integrally with the base 10 and engaged with the guide groove 46 of the lens holder 40 .

It should be noted that the present disclosure is not limited to the above embodiments and modifications thereof, and various improvements and modifications are possible within the scope of the claims of the present application.

For example, the case where the optical block 70 is composed of the lens holder 40 and the lens 30 has been described above. However, the optical block may consist of lenses only.

Moreover, the case where the guide groove 46 penetrates the arcuate wall portion 45 in the thickness direction has been described. However, the guide groove does not have to penetrate the wall portion of the optical block in the thickness direction, and may have a shape formed by a pair of side wall portions and a bottom portion.

Also, the lighting device 1 has a configuration in which the tilt angle of the optical axis direction with respect to the height direction of the frame 20 can be varied, and the lighting device 1 is a so-called universal downlight. However, the lighting device may have a configuration in which the tilt angle of the optical axis direction with respect to the vertical direction cannot be adjusted, and may not be a universal lighting device.

Further, downlights and spotlights come in a wide variety of structures, and the technology of the present disclosure may be based on any one of these wide variety of downlights and spotlights. Moreover, although the case where the lighting device 1 is an embedded downlight has been described, the lighting device may be suspended from a rail or suspended from a ceiling.

Reference Signs List 1 illumination device 10 base (housing) 11 bottomed cylindrical portion 12 fin 13a annular projecting portion 13b, 33 flange portion 15 spring mounting member 15a annular flat plate portion 15b spring mounting portion 17 optical axis adjusting member 17a annular flat plate portion 17b upper base fixing portion 17c lower base fixing portion 17d long hole 20 frame 21, 63 screw 23 mounting spring 24 pedestal portion 30 lens 31 recessed portion 32, 41 outer peripheral surface 34 fitting portion 35 end surface 36 notch portion 40, 40A lens holder 42 fitting convex portion 43 locking projection 44 guide projection (projecting portion) 45, 45a circle Arc-shaped wall portion 46 Guide groove 50 Rotating member 51 Upper end tube portion 52 Intermediate tube portion 53 Grasping portion 54 Notch 55 Stepped portion 56 Locking projection 60 Light source module 61 Substrate 62 Light source 64a , 64b electrode terminal, 65 substrate holder, 66 engaging portion, 66A engaging member, 70 optical block, L optical axis.

Claims (6)

a housing;
a light source disposed within the housing;
an optical block that includes a lens disposed on the light emitting side of the light source in the housing, and is rotatable relative to a stationary portion that is stationary with respect to the light source;
a rotating member that is rotatable with respect to the stationary portion and whose position in the optical axis direction remains substantially unchanged;
The optical block has a guide groove,
The lighting device, wherein the stationary portion has an engaging portion that is fitted in the guide groove and changes its position in the guide groove when the rotating member rotates with respect to the stationary portion. 2. The lighting device according to claim 1 , wherein the engaging portion is provided on a substrate holder to which a substrate on which the light source is arranged is fixed and which is fixed to the housing . 3. The illumination device according to claim 1, wherein said guide groove is inclined with respect to a plane orthogonal to said optical axis direction. The optical block has a lens holder that holds the lens,
The illumination device according to any one of claims 1 to 3, wherein the guide groove is provided in the lens holder. The optical block has a protruding portion that protrudes radially outward on its outer peripheral portion, the rotating member has a notch portion that extends in the optical axis direction, and the optical block is positioned relative to the rotating member in the optical axis direction. 5. The lighting device according to claim 1, wherein the projection moves along the notch while being fitted in the notch when moving to the right. The housing includes a base to which the light source is fixed, and a frame arranged on the light emitting side of the base,
The lighting device according to any one of claims 1 to 5, wherein an inclination angle of the optical axis direction with respect to the height direction of the frame is variable.

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