JP7117641B2 - 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, the height position of the lens holder relative to the base can be varied by rotating the lens holder relative to the base, so that the position of the lens in the optical axis direction relative to the light source module can be adjusted appropriately. . Therefore, narrow-angle control of emitted light can be performed.

Japanese Patent No. 6159460

In the lighting device described above, in order to adjust the position of the lens in the optical axis direction with respect to the light source module, it is necessary to rotate the lens holder with respect to the base and move it in the optical axis direction with respect to the base. 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 narrow-angle control, is easy to realize compactness, and is excellent in appearance.

In order to solve the above problems, 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 stationary with respect to the light source. and a rotating member whose position in the optical axis direction remains substantially unchanged and is rotatable with respect to the stationary portion, wherein the optical block and the rotating member One of them has an inclined groove that is inclined with respect to the optical axis direction, and the other of the optical block and the rotating member is fitted in the inclined groove, and when the rotating member rotates with respect to the stationary part, the optical block and the rotating member are aligned in the inclined groove. It has a fitting part whose position changes. Note that the requirement of "a lens arranged on the light emitting side of the light source" is satisfied if the end surface of the lens on the light emitting side in the optical axis direction is located on the light emitting side of the light source in the optical axis direction. and

In this specification, the inclined groove has a structure having a pair of inner wall surfaces that are inclined with respect to the optical axis direction and face each other, and at least one of the fitting portions positioned between the pair of inner wall surfaces It is defined as a structure that allows the fitting portion to move along the extending direction of the pair of inner wall surfaces by guiding the portion with the pair of inner wall surfaces. Therefore, although the inclined groove may have a structure with a bottom portion, it has a structure of a through hole having an elongated elongated hole shape inclined with respect to the optical axis direction so that the rotating member or the side wall of the optical block extends in the thickness direction. may pass through.

According to the lighting device according to the present disclosure, narrow angle control can be performed, 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 perspective view of the member for optical axis adjustment. 1 is an exploded perspective view of main components of a lighting device; FIG. FIG. 4 is a perspective view showing the light source module arranged on the main surface of the base of the lighting device; FIG. 4 is a cross-sectional view of the lighting device in a state in which the central axis of the frame substantially coincides with the optical axis direction; 1 is a perspective view of an optical block composed of a lens holder and a lens held by it; FIG. It is a perspective view of a lens holder. 1 is a perspective view of a lens; FIG. It is a perspective view of a rotation member. FIG. 4 is a perspective view of a rotating member assembly in which an optical block and a rotating member are integrally integrated; FIG. 4 is a perspective view of the first member of the base; FIG. 2 is a perspective view of the lighting device when viewed from an angle different from that of FIG. 1; It is a perspective view when the lighting device is viewed from below. It is a schematic diagram in the midst of upward movement of the fitting nail|claw of the modification which is fitted in the inclined groove of the modification seen from the radial direction outside.

Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings. In addition, when a plurality of embodiments and modifications are included in the following, it is assumed from the beginning that the characteristic portions thereof will be appropriately combined to construct a new embodiment. Moreover, in the following embodiments, the same reference numerals are given to the same configurations in the drawings, and redundant explanations are omitted. In addition, the dimensional ratios of length, width, height, etc. of each member do not necessarily match between different drawings. Also, in the drawings and the following description, the R direction is the radial direction of the base 10 and the θ direction is the circumferential direction of the base 10 . The Z direction is the direction of the optical axis, which coincides with the height direction of the base 10 and also coincides with the extending direction of the central axis of the lens 30 . The R direction, θ direction, and Z direction are orthogonal to each other. 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. 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. More specifically, as shown in FIG. 1 , lighting device 1 includes 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 and is included in the stationary portion that is stationary with respect to the light source 62 . 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 heat from the light source 62 to the outside air. do. 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 have a configuration in which the bottomed cylindrical portion and the fins are joined together. In this case, for example, the bottomed cylindrical portion and the fins may be connected by plastically deforming the projections provided on the bottomed cylindrical portion after being inserted into the holes provided in the fins. 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. Specifically, 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 in the folded state. The frame body 20 is a cylindrical member forming the lower side of the housing, and includes an annular disk-shaped upper end face (not shown). As shown in FIG. 2, that is, a perspective view of the optical axis adjusting member 17, 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. The upper base fixing portion 17b protrudes upward from the annular flat plate portion 17a, while the lower base fixing portion 17c protrudes downward from the annular flat plate portion 17a.

Again referring to FIG. 1, the annular flat plate portion 15a of the spring mounting member 15 and the upper end face 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. It is fixed with a screw 27 to the upper end face of the body 20 . By this fixation, the spring mounting member 15, the optical axis adjusting member 17, and the frame 20 are integrated. As shown in FIG. 2, the upper base fixing portion 17b has an elongated hole 17d, and the lower base fixing portion 17c has a cylindrical hole 17e. Referring to FIG. 1, base 10 is screwed to frame 20 using long hole 17d and cylindrical hole 17e (see FIG. 2) while being inclined at a desired angle with respect to frame 20. be.

As shown in FIG. 1, the base 10 is fixed to the right end of the elongated hole 17d with screws 21 when the extending direction of the central axis of the frame body 20 substantially coincides with the Z direction. The base 10 inclines with respect to the frame 20 as the fixing position by the screw 21 moves to the left of the long hole 17d in the plane of the drawing. Thereby, the base 10 can be fixed to the frame 20 while the base 10 is inclined at a desired angle with respect to the frame 20 .

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 embedding hole. As a result, the lighting device 1 is fixed to the inner surface of the embedded hole in the ceiling by the horizontal force that the mounting spring receives from the inner surface of the embedded hole.

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 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. can be high Note that three or more mounting 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 control the emitted light at a narrow angle. Next, this matter will be explained. FIG. 3 is an exploded perspective view of the main components of the lighting device 1. FIG. 4 is a perspective view showing the light source module 60 arranged on the main surface 24 of the base 10, and FIG. 5 shows a state in which the central axis of the frame 20 substantially coincides with the Z direction. 2 is a cross-sectional view of the illumination device 1 in FIG.

As shown in FIG. 3 , the illumination device 1 includes a lens 30 , a lens holder 40 and a rotary member 50 in addition to the base 10 and the frame 20 . Moreover, as shown in FIG. 4 , the illumination device 1 includes a light source module 60 fixed to the main surface of the base 10 , and the light source module 60 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. Although not described in detail, the substrate 61 is formed with a pair of electrode terminals and a predetermined pattern of metal wiring. A pair of electrode terminals is provided for externally receiving DC power for causing the LED 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 in a matrix on the substrate 61, for example. 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 , the substrate 61 is housed in a recess 64 provided on the main surface 24 of the base 10 . The illumination device 1 also has two substrate holders (not shown), which are arranged below the substrate 61 and on both sides in the longitudinal direction or the width direction. The substrate holder has, for example, substrate receiving portions (not shown) that overlap both longitudinal or widthwise end portions 61e of the substrate when viewed from the Z direction while being fixed to the base 10 . The substrate 61 is fixed to the base 10 by being pressed against the main surface 24 by the substrate receiving portion. Referring to FIG. 5, lens 30 is arranged closer to the light exit side than light source 62 (see FIG. 4) in the Z direction. More precisely, the end surface 96 of the lens 30 on the light exit side in the Z direction is positioned closer to the light exit side in the Z direction than 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 a perspective view of an optical block 70 composed of a lens holder 40 and a lens 30 held therein, FIG. 7 is a perspective view of the lens holder 40, and FIG. 8 is a perspective view of the lens 30. is. 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. Also, 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.

As shown in FIG. 7, the lens holder 40 has three first locking portions 41 spaced apart in the circumferential direction, and each first locking portion 41 extends in the Z direction. The first locking portion 41 includes a concave surface 41a that is convex inward in the R direction, and the concave surface 41a faces outward in the R direction and extends in the Z direction. A role of the first locking portion 41 will be described later. Further, the lens holder 40 has three lens fitting portions 42, and the three lens fitting portions 42 are arranged at approximately equal intervals in the θ direction and arranged on the inner peripheral side. The lens fitting portion 42 is configured by a protruding portion that protrudes inward in the R direction. As shown in FIG. 8, the lens 30 has a shape that widens toward the lower side in the Z direction. The lens 30 has three holder fitting portions 31 arranged at approximately equal intervals in the θ direction at the lower end portion on the outer peripheral side. The holder fitting portion 31 has a shape corresponding to the shape of the lens fitting portion 42 (see FIG. 7), and is configured by a recess recessed inward in the R direction. By press-fitting the lens fitting portion 42 into the holder fitting portion 31, the lens 30 is fixed to the lens holder 40, and as a result, the optical block 70 shown in FIG. 6 is configured.

Next, an integrated structure that allows relative movement of the optical block 70 with respect to the rotating member 50 will be described. As shown in FIG. 7, the lens holder 40 has two fitting claws 48 on the outer peripheral side. The fitting claw 48 is an example of a fitting portion. The two fitting claws 48 are arranged to face each other in the R direction, and each fitting claw 48 has a plate shape with a pair of inclined surfaces 48a and 48b. Each inclined surface 48a, 48b extends in a direction inclined with respect to the Z direction.

9 is a perspective view of the rotating member 50. FIG. As shown in FIG. 9, the rotating member 50 is a substantially cylindrical member and has two inclined grooves 51 spaced apart in the θ direction. The slanted groove 51 has a shape consisting of a part of a spiral groove. The inclined groove 51 is inclined with respect to the Z direction, and extends from the lower side in the Z direction to the upper side in the Z direction of the rotary member 50 toward one side in the θ direction. The inclined groove 51 has a structure of an elongated long hole-shaped through hole penetrating through the rotating member 50 in the thickness direction, and includes a pair of inner wall surfaces (inclined surfaces) 51a and 51b facing each other in the Z direction.

As shown in FIG. 10, the optical block 70 and the rotating member 50 are integrated by fitting the fitting claws 48 protruding outward in the R direction of the optical block 70 into the inclined grooves 51 of the rotating member 50 . , a rotating member assembly 80 is constructed. The fitting claw 48 is movable within the inclined groove 51 in the extending direction of the inclined groove 51 . When the optical block 70 rotates relative to the rotary member 50 in the direction indicated by θ1 in FIG. 10 from the state shown in FIG. 10 , the lens 30 moves upward in the Z direction with respect to the rotary member 50 . By adjusting the position of the fitting claw 48 in the inclined groove 51 in this way, the Z-direction position of the lens 30 with respect to the rotary member 50 can be adjusted.

Next, a mounting structure of the rotary member assembly 80 to the base 10 will be described. As shown in FIG. 3, the base 10 has a two-part structure and includes a first member 10a and a second member 10b. 11 is a perspective view of the first member 10a of the base 10. FIG. As shown in FIG. 11, the base 10 has a plurality of columnar portions (ribs) 18 extending downward in the Z direction from the main surface 24 side. The columnar portion 18 is an example of a second locking portion provided on a stationary portion stationary with respect to the light source 62 . A tip surface of the columnar portion 18 is a convex surface 18a that is convex inward in the R direction. In this embodiment, the first member 10a shown in FIG. 11 has two columnar portions 18, and the second member 10b has one columnar portion (not shown).

The convex surfaces 18a of the three columnar portions 18 are engaged with the concave surfaces 41a (see FIG. 10) of the three first engaging portions 41 of the lens holder 40 included in the rotating member assembly 80. As shown in FIG. After that, as shown in FIG. 12, that is, a perspective view of the illumination device 1 when viewed from a different angle from FIG. 80 is attached to the base 10 and integrated with the base 10 .

As shown in FIG. 5, the rotating member 50 has a first annular flange portion 57 and a second annular flange portion 58 located below it in the Z direction. An annular groove 59 is provided between the . The base 10 also has an annular projecting portion 19 projecting downward in the Z direction and inward in the R direction. The annular protrusion 19 is arranged in the annular groove 59 in a state in which the first member 11a and the second member 11b are integrated, and the base 10 and the rotary member assembly 80 are integrated. When viewed from the Z direction, the first annular flange portion 57 has a portion that overlaps the annular projecting portion 19, and the annular end surface 14 located on the lower side in the Z direction of the base 10 overlaps the second annular flange portion 58. have a part. As shown in FIG. 5, in a state in which the lower surface of the first annular flange portion 57 is in contact with the upper surface of the annular projecting portion 19, the annular end surface 14 is attached to the upper surface of the second annular flange portion 58 with a slight gap therebetween. Oppose in the Z direction. The downward movement of the rotating member 50 relative to the base 10 is restricted by the annular protrusion 19 , and the upward movement of the rotating member 50 relative to the base 10 is restricted by the annular end face 14 of the base 10 . As a result, the rotating member 50 can rotate relative to the base 10 in a state in which the Z-direction position does not substantially change with respect to the base 10 . Since the small gap is present, the rotating member 50 can be smoothly rotated with respect to the base 10 . The Z-direction position of the rotating member 50 with respect to the base 10 varies by the Z-direction length of the slight gap. Therefore, to repeat, the Z-direction position of the rotating member 50 relative to the base 10 does not substantially change.

Again referring to FIG. 9, the rotating member 50 has an annular gripping portion 52 on the lower side in the Z direction for a person to grip and rotate it. As shown in FIG. 13 , that is, a perspective view of the illumination device 1 viewed from below, there is a gap between the base 10 and the rotating member 50 . Therefore, a person can insert a finger into the gap to rotate the grip portion 52 of the rotating member 50, and can freely rotate the rotating member 50 in both directions in the θ direction with respect to the base 10. .

In the above configuration, it is assumed that a person uses the grip portion 52 to rotate the rotating member 50 with respect to the base 10 . Then, since the optical block 70 cannot rotate with respect to the base 10 due to the locking of the first locking portion 41 to the columnar portion 18, the optical block 70 does not rotate together with the rotation of the rotating member 50. , the rotating member 50 rotates relative to the optical block 70 . Accordingly, this relative rotation causes the fitting claw 48 to move within the inclined groove 51, and as a result, the optical block 70 moves relative to the rotating member 50 in the Z direction. Therefore, as described above, even if the rotating member 50 rotates, the Z-direction position of the rotating member 50 hardly changes, so that the Z-direction position of the optical block 70 can be freely changed, and the lens 30 included therein can be changed. can be freely changed in the Z direction.

As described above, the illumination device 1 includes a housing (the base 10 and the frame 20), the light source 62 arranged in the housing, and the lens 30 arranged in the housing on the light emission side of the light source 62. It comprises an optics block 70 with limited relative rotation to the base (stationary part) 10 which is stationary with respect to 62 . The illumination device 1 also includes a rotating member 50 that is rotatable with respect to the base 10 without substantially changing its position in the optical axis direction (Z direction). Also, one of the optical block 70 and the rotating member 50 (the rotating member 50) has an inclined groove 51 that is inclined with respect to the Z direction. The other (optical block 70) of the optical block 70 and the rotating member 50 is fitted in the inclined groove 51, and when the rotating member 50 rotates with respect to the base 10, the position in the inclined groove 51 changes. It has a mating claw (fitting portion) 48 .

Therefore, when the rotating member 50 is rotated with respect to the base 10, the fitting claw 48 whose position in the .theta. The optical block 70 can be moved in the Z direction with respect to the rotating member 50 . Therefore, the Z-direction position of the optical block and, in turn, the lens 30 can be freely changed, making it easier to perform desired dimming such as narrow-angle control.

Further, the rotating member 50 rotates with respect to the base 10 in a state in which the Z-direction position is substantially unchanged, and the optical block 70 moves up and down in the rotating member 50 in the Z-direction. Therefore, when changing the position of the optical block 70 in the Z direction, the rotating member 50 does not move back and forth with respect to the base 10 in the Z direction. Therefore, the height dimension of the illumination device 1 does not change. Therefore, it is easy to realize compactness of the illumination device 1, and the appearance of the illumination device 1 is also excellent in beauty.

Also, an oblique groove 51 may be present in the rotating member 50 .

According to the above configuration, it is possible to dispose a member having a side wall that requires a height for the range of movement of the lens 30 in the Z direction and that requires a height equal to or greater than a predetermined height, radially outward of the optical block 70 . Therefore, since it is not necessary to provide a side wall that requires a height higher than a predetermined value near the lens 30, the degree of freedom in designing the lens 30 can be increased, and the size of the lens 30 can be easily increased.

Alternatively, the optical block 70 may have a lens holder 40 that holds the lens 30, and the lens holder 40 may include the first locking portion 41 extending in the Z direction. Alternatively, the first locking portion 41 may be locked to the columnar portion (second locking portion) 18 provided on the base 10 stationary with respect to the light source 62 .

According to the above configuration, the first locking portion 41 of the lens holder 40 extends in the Z direction and locks onto the columnar portion 18 of the base 10 . Therefore, it is possible to increase the Z-direction length of the portions to be locked with each other, and to make the locking more sturdy and reliable. Therefore, it is possible to reliably prevent the rotation of the optical block 70 with respect to the rotating member 50, and stabilize the behavior of the optical block 70 when it is moved in the Z direction.

Alternatively, the fitting portion may be a fitting claw 48 having a pair of inclined surfaces 48 a and 48 b facing the pair of inner wall surfaces 51 a and 51 b of the inclined groove 51 .

According to the above configuration, a wider surface portion of the fitting portion can be brought into contact with the inner wall surfaces 51 a and 51 b of the inclined groove 51 . Therefore, the behavior of the optical block 70 when moving in the Z direction can be further stabilized.

At least one of the pair of inclined surfaces may include a first inclined portion and a second inclined portion having a greater inclination than the first inclined portion.

In the case of a configuration in which the same portion of the fitting claw always contacts the inner wall surface of the inclined groove when the fitting claw moves within the inclined groove, the durability of the fitting claw tends to be low. In order to avoid this, for example, FIG. As shown, the lower sloped surface 175 of the mating pawl 148 may include a first sloped portion 170 and a second sloped portion 171 having a greater slope than the first sloped portion 170 . Also, the upper inclined surface 165 of the fitting claw 148 may include a first inclined portion 160 and a second inclined portion 161 having a greater inclination than the first inclined portion 160 . In addition, the inclination of the first inclined portion 170, which is the leading side when moving upward, may be gentler than the inclination of the second inclined portion 171, which is the rear side, and the leading side when moving downward. The inclination of the first inclined portion 160 may be gentler than the inclination of the second inclined portion 161 on the rear side.

Then, when the fitting claw 148 moves to the upper side of the inclined groove 151, as shown in FIG. 14, the lower side of the leading end may contact the inner wall surface 151a of the lower side of the inclined groove. Further, when the fitting claw 148 moves to the lower side of the inclined groove 151, the upper side of the leading end may contact the inner wall surface 151b of the upper side of the inclined groove. In this manner, the portion of the fitting claw 148 that contacts the inclined groove 151 may be different depending on whether the fitting claw 148 moves upward or downward. Further, the rigidity (strength) of both end portions 190 and 191 of the fitting claw 148 contacting the inclined groove 151 may be made higher than the rigidity of the central portion 192 of the fitting claw 148 not contacting the inclined groove 151 . In this manner, the durability of the fitting claw 148 may be enhanced.

The housing may also include a base 10 to which the light source 62 is fixed, and a frame 20 arranged on the light emitting side of the base 10 . Also, the tilt angle in the Z direction (optical axis direction) with respect to the height direction of the frame 20 may be variable.

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 in which the length in the optical axis direction of is changed is adopted. 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 is necessary to increase the size of the frame, and the illumination device tends to be particularly large. However, in the case of the technique of the present disclosure, even if the illumination device 1 is of a universal type as in the present embodiment, the lens 30 moves within the rotating member 50 when the position of the lens 30 in the optical axis direction is varied. The appearance (dimensions) of the lighting device 1 does not change at all just by doing so. 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.

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 and their equivalents.

For example, in the above embodiment, the rotating member 50 has the inclined grooves 51 and the optical block 70 has the fitting claws 48 . However, the optical block may have an inclined groove on its outer peripheral surface that is inclined with respect to the direction of the optical axis, and the rotating member is fitted in the inclined groove, and when the rotating member rotates, the position in the inclined groove changes. It may have joints.

Moreover, the case where the optical block 70 is configured by the lens holder 40 and the lens 30 has been described. However, the optical block may consist of lenses only.

Moreover, the case where the inclined groove 51 penetrates the rotary member 50 in the thickness direction has been described. However, the inclined groove does not have to pass through the side walls of the rotating member or the optical block in the thickness direction, and may have a bottom connecting between the pair of side walls. However, if the inclined groove has a through-hole structure that penetrates the member in which it is formed in the thickness direction, the size of the fitting claw in the thickness direction can be increased, and the volume of the fitting claw can be reduced. We can make it big. Therefore, the strength of the fitting claw can be increased, which is preferable.

Also, the case where the fitting portion fitted into the inclined groove 51 is the plate-shaped fitting claw 48 having the pair of inclined surfaces 41a and 41b has been described. 14, the lower sloped surface 175 of the fitting claw 148 includes the first sloped portion 170 and the second sloped portion 171 having a greater slope than the first sloped portion 170, and the upper sloped surface 165 includes the first sloped portion 171. A case has been described in which the portion 160 and the second inclined portion 161 having a greater inclination than the portion 160 are included. However, one or both of the lower inclined surface and the upper inclined surface of the fitting claw may have the same inclination with respect to the optical axis direction at all points. Alternatively, the fitting portion that fits into the inclined groove may have any shape other than the plate shape, and may have, for example, a pin shape. Also, in this case, with the optical block placed inside the rotating member, a pin having a male thread at its tip is tightened from the outside of the rotating member into the female thread on the side surface of the optical block so as to pass through the inclined groove of the rotating member. , the rotating member and the optical block may be integrated. In the case where two or more portions with different inclination angles are formed on at least one of the lower inclined surface and the upper inclined surface, the locations that come into contact with the inclined grooves are intentionally adjusted for each specification, and the rigidity of those locations is localized. preferably higher.

Also, the case where the lens fitting portion 42 is configured by a protrusion projecting inward in the R direction and the holder fitting portion 31 is configured by a recess recessed inward in the R direction has been described. However, the lens fitting portion may be configured by a concave portion recessed outward in the R direction, and the holder fitting portion may be configured by a projection portion that protrudes outward in the R direction and fits into the concave portion.

In addition, although the lens holder 40 has the three first locking portions 41 spaced apart from each other in the θ direction, the lens holder may have at least one locking portion. It is preferable to have two or more stops spaced apart from each other in the direction. The lens holder 40 has three lens fitting portions 42 spaced apart from each other in the θ direction, and the lens 30 has three holder fitting portions spaced apart from each other in the θ direction. 31 has been described. However, the lens holder may have one or more lens fitting portions, and preferably has two or more lens fitting portions spaced apart from each other in the θ direction. The lens may also have one or more holder fitting portions, and preferably has two or more holder fitting portions spaced apart from each other in the θ direction. Also, the case where the illumination device 1 has two inclined grooves 51 spaced apart from each other in the θ direction has been described. However, the illumination device 1 may have only one inclined groove, or may have three or more inclined grooves spaced apart from each other in the θ direction. In addition, when the lighting device has N (N is any natural number) inclined grooves, it is sufficient that the rotating member rotates (360/N) degrees with respect to the base, and the lighting device has two or more grooves. With angled grooves, it is not necessary for the rotating member to rotate 360° with respect to the base.

Also, the case where the lens holder 40 has the first locking portion 41 extending in the Z direction has been described. However, any other structure may be used to prevent the lens holder from co-rotating with respect to the base. For example, a protrusion extending radially outward is provided on the upper side in the height direction of the lens holder, and the tip of the protrusion on the radially outer side is accommodated in a concave portion provided on the inner surface of the base. Co-rotation of the holder with respect to the base may be prevented. Such locking can be realized by making the base into a split structure as in this embodiment.

Also, the case where the optical block 70 cannot rotate with respect to the base 10 due to the locking of the first locking portion 41 to the columnar portion 18 has been described. However, the optical block may be rotatable only in a narrow predetermined region in the circumferential direction with respect to the stationary portion stationary with respect to the light source, and when the rotating member rotates, the optical block moves slightly in the circumferential direction. It may also be configured such that it rotates together with the rotating member only within a certain range. Even if a configuration is adopted that permits relative rotation of the optical block with respect to a stationary portion that is stationary with respect to the light source, the movement of the optical block in the optical axis direction can be prevented by limiting the range of relative rotation to a predetermined circumferential region. It can run smoothly.

Further, the rotating member 50 is provided with a first annular flange portion 57 and a second annular flange portion 58 located below it in the Z direction, and the annular protruding portion 19 of the base 10 is attached to the first annular flange portion 57 . and the second annular flange portion 58 has been described. A case has been described in which the rotating member 50 is configured to be rotatable in a state in which the Z-direction position relative to the base 10 is substantially unchanged.

However, in a configuration different from the configuration described in the embodiment, the rotating member may be made rotatable with respect to the base in a state in which the Z-direction position is substantially unchanged. For example, one or more of the first annular flange portion of the rotating member, the second annular flange portion of the rotating member, and the annular protrusion of the base may be non-annular in structure.

Also, the case where the rotating member 50 has two annular flange portions and the base 10 has one annular projecting portion 19 projecting radially inward has been described. However, the rotating member has only one annular protrusion that protrudes radially outward, and the base has two annular flanges that protrude radially inward and are located at different positions in the optical axis direction. It's okay. Then, when the lighting device is assembled, the annular protrusion overlaps the two annular flanges in a state in which the radially outer tip of the annular protrusion overlaps both of the two annular flanges when viewed in the optical axis direction. may be located between In short, the illumination device may have any structure that allows the rotating member to rotate with respect to the base with its Z-direction position substantially unchanged.

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.

In addition, there are a wide variety of structures for downlights and spotlights, and the technology of the present disclosure may be based on any 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. In short, the lighting device of 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 stationary with respect to the light source. an optical block whose relative rotation is restricted with respect to the optical block; It has an inclined groove inclined with respect to the optical axis direction, and when the other of the optical block and the rotating member is fitted in the inclined groove and the rotating member rotates with respect to the stationary part, the existing position in the inclined groove changes. The lighting device may have any structure as long as it has a structure having a fitting portion.

Reference Signs List 1 illumination device 10 base 18 column 20 frame 30 lens 40 lens holder 41 first locking portion 48,148 fitting claws 48a, 48b pair of inclined surfaces of fitting claws 50 Rotating member 51, 151 inclined groove 51a, 51b inner wall surface of inclined groove 62 light source 70 optical block 151a lower inner wall surface of inclined groove 151b upper inner wall surface of inclined groove 160 first inclination of upper inclined surface Part 161 Second inclined portion of upper inclined surface 165 Upper inclined surface of fitting claw 170 First inclined portion of lower inclined surface 171 Second inclined portion of lower inclined surface 175 Lower inclined surface R Direction Radial direction of base, θ direction Peripheral direction of base, Z direction Optical axis direction (height direction of base).

Claims (6)

a housing;
a light source disposed within the housing;
an optical block including a lens disposed on the light emitting side of the light source in the housing, the optical block being restricted in relative rotation with respect to a stationary portion 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;
one of the optical block and the rotating member has an inclined groove inclined with respect to the optical axis direction;
The other of the optical block and the rotating member has a fitting portion that is fitted in the inclined groove and changes its position in the inclined groove when the rotating member rotates with respect to the stationary portion. death,
The optical block has a lens holder that holds the lens,
the lens holder includes a first locking portion extending in the optical axis direction,
The first locking portion is locked to a second locking portion provided on the stationary portion. Do, lighting equipment. a housing;
a light source disposed within the housing;
an optical block including a lens disposed on the light emitting side of the light source in the housing, the optical block being restricted in relative rotation with respect to a stationary portion 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;
one of the optical block and the rotating member has an inclined groove inclined with respect to the optical axis direction;
The other of the optical block and the rotating member has a fitting portion that is fitted in the inclined groove and changes its position in the inclined groove when the rotating member rotates with respect to the stationary portion. death,
The fitting portion is a fitting pawl having a pair of inclined surfaces facing a pair of inner wall surfaces of the inclined groove. lighting equipment. 3. The lighting device according to claim 2 , wherein at least one of said pair of inclined surfaces includes a first inclined portion and a second inclined portion having a greater inclination than said first inclined portion. a housing;
a light source disposed within the housing;
an optical block including a lens disposed on the light emitting side of the light source in the housing, the optical block being restricted in relative rotation with respect to a stationary portion 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;
one of the optical block and the rotating member has an inclined groove inclined with respect to the optical axis direction;
The other of the optical block and the rotating member has a fitting portion that is fitted in the inclined groove and changes its position in the inclined groove when the rotating member rotates with respect to the stationary portion. death,
The housing includes a first member and a second member that are integrated by being fastened with screws,
A rotating member assembly configured by integrating the optical block and the rotating member by fitting the fitting portion into the inclined groove is configured by integrating the first member and the second member by fastening the screw. When the rotating member is integrated with the housing in a state in which the rotating member is relatively rotatable with respect to the housing, lighting equipment. 5. A lighting device according to any one of the preceding claims, wherein said oblique groove is present in said rotary member. 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 the inclination angle of the optical axis direction with respect to the height direction of the frame is variable.

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