JP7236650B2 - 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 is a so-called universal downlight, and can adjust the inclination angle of the optical axis of the light emitted from the light source with respect to the vertical direction to a desired angle. Specifically, the lighting device includes a housing, a frame, a light source arranged in the housing, and an optical axis angle adjusting member, the optical axis angle adjusting member comprising a flat plate-like first fixing portion including a long hole, and a second fixing portion fixed to the frame so as not to move relative to the frame. The optical axis angle adjustment member is fixed to the housing by passing the shaft portion of the screw through the long hole and then tightening it into a predetermined position of the housing. Therefore, by changing the fixing position of the optical axis angle adjusting member with respect to the housing, the inclination angle of the optical axis angle adjusting member with respect to the housing can be changed. Therefore, since the optical axis angle adjusting member is fixed to the frame so as not to be able to move relative to the frame and is stationary with respect to the frame, by changing the fixed position of the optical axis angle adjusting member with respect to the housing, the frame can be adjusted. The tilt angle of the housing relative to the body can be adjusted. Therefore, the tilt angle of the optical axis with respect to the axial direction of the frame can be adjusted, and as a result, the tilt angle of the optical axis with respect to the vertical direction can be adjusted.

JP 2018-180127 A (Fig. 1)

In the above-mentioned downlight, when the frame is fixed to a mounting hole or the like provided in the ceiling of a building, etc., the user can apply a force greater than the static friction force caused by the tightening force of the screw to the first fixing portion. By applying it to the body, the screw moves through the slot to tilt the housing with respect to the frame.

In this background, when the housing is tilted at a desired angle with respect to the frame, generating a sufficient frictional force to keep the housing stationary with respect to the frame allows the screw to be slotted. Operability to move inside may decrease. Then, it may become difficult for the screw to move to a prescribed position on the end side of the long hole, making it difficult to tilt the housing to the prescribed maximum tilt angle with respect to the frame. On the other hand, if the frictional force that keeps the housing stationary with respect to the frame is small, it becomes difficult to reliably lock the housing to the frame.

Accordingly, an object of the present disclosure is to provide a lighting device that easily secures sufficient frictional force to keep the housing stationary with respect to the frame, and that facilitates movement of the screw to a specified position on the end side of the long hole. to provide.

In order to solve the above problems, a lighting device according to the present disclosure includes a housing, a frame, a light source arranged in the housing, and a recess that is recessed outward in an extending direction at least on one end. an optical axis angle adjusting member having a flat plate-shaped first fixing portion including a long hole and a second fixing portion fixed to the frame; A ring-shaped resin washer made of resin is arranged so as to be in contact with the first fixing portion, and is arranged on the side opposite to the housing side in the thickness direction of the first fixing portion. 1. A biasing member that presses the fixed portion toward the housing, a shaft portion having a male thread portion that is screwed into the housing and passing through the elongated hole and the through hole of the resin washer, and the biasing member on the side of the first fixed portion. a screw having a bearing surface that presses against. The elongated hole may be configured so that the position where the screw is fixed can be changed, and the entire extending direction may be curved, or a part of the extending direction may be curved, Another part of the extending direction may be parallel to the straight line.

According to the lighting device according to the present disclosure, it is easy to secure a sufficient frictional force to keep the housing stationary with respect to the frame, and it is easy to move the screw to the specified position on the end side of the long hole.

1 is a perspective view of a lighting device according to an embodiment of the present disclosure; FIG. It is a perspective view of an optical axis angle adjustment member. FIG. 4 is a perspective view of a part of the lighting device, explaining a structure for fixing the optical axis angle adjusting member to the housing; FIG. 2 is a schematic cross-sectional view taken along the line AA of FIG. 1, and is a schematic cross-sectional view of the lighting device including the central axis of the screw and the width direction of the long hole. 5 is a perspective view of a spring washer included in the fixing structure shown in FIG. 4; FIG. (a) is a plan view showing the positional relationship between the upper housing fixing portion, the second resin washer, and the spring washer as viewed from the outside in the thickness direction of the upper housing fixing portion, and is a plan view of the three possible actually occurring FIG. 3B is a plan view showing the positional relationship of the two parts, and FIG. 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 housing 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; It is a perspective view of the 1st member of a housing|casing. 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. (a) is a schematic cross-sectional view corresponding to FIG. 4 in a lighting device of a modified example, and (b) is a schematic cross-sectional view corresponding to FIG. 4 in a lighting device of another modified example. (a) is a side view of a wave washer, and (b) is a plan view of the wave washer. (a) is a side view of a disc spring washer, and (b) is a plan view of the disc spring washer.

Embodiments according to the present disclosure will be described in detail below 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. Further, 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 housing 10 and the θ direction is the circumferential direction of the housing 10 . The Z direction is the direction of the optical axis, which coincides with the height direction of the housing 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, the inclined groove described below has a structure having a pair of inner wall surfaces that are inclined with respect to the Z direction and face each other, and at least a part of the fitting portion positioned between the pair of inner wall surfaces is a pair of grooves. 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 being guided by the inner wall surfaces of the pair of inner wall surfaces. Therefore, the inclined groove may have a structure with a bottom portion, but like the inclined groove 51 described below, it has a structure of a through hole having an elongated elongated hole shape inclined with respect to the optical axis direction, It may pass through the side wall of the member or the optical block (lens assembly) in the thickness 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 housing 10 . The housing 10 has a bottomed cylindrical portion 11 . The housing 10 functions as a mounting base for mounting the light source 62 (see FIG. 8) inside the bottomed cylindrical portion 11 and is included in the first stationary portion stationary with respect to the light source 62 . The housing 10 has a plurality of fins 12 protruding upward, and the entire housing also functions as a heat sink that dissipates heat generated by the light source 62. In particular, the fins 12 dissipate heat from the light source 62 to the outside. do. Therefore, it is preferable that the housing 10 is made of a material with high thermal conductivity such as a metal material. The housing 10 is configured by integrally molding the bottomed cylindrical portion 11 and the fins 12 with, for example, aluminum die-casting. Note that the housing may have a structure 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 housing may not have fins.

The lighting device 1 further includes a spring mounting member 15 , an optical axis angle adjusting member 17 and a frame 20 . Each of the spring mounting member 15, the optical axis angle 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 housing 10, the spring mounting member 15, the optical axis angle 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 20 is a cylindrical member and includes an annular disk-shaped upper end surface (not shown). As shown in FIG. 2, that is, a perspective view of the optical axis angle adjustment member 17, the optical axis angle adjustment member 17 includes an annular flat plate portion 17a, a plate-like upper housing fixing portion 17b as a first fixing portion, and a plate-shaped lower housing fixing portion 17c as a second fixing portion. It protrudes downward from the portion 17a. The optical axis angle adjusting member 17 is made of metal, for example, by bending a sheet metal.

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 angle adjusting member 17, and the annular flat plate portion 15a is mounted on 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 angle adjusting member 17, and the frame 20 are integrated.

As shown in FIG. 2, the upper housing fixing portion 17b has an elongated hole 17d, and the lower housing fixing portion 17c has a cylindrical hole 17e. Further, the long hole 17d has recesses 17f and 17g that are recessed outward in the extending direction at both ends in the extending direction. Although not shown, the housing 10 has first and second screw holes for screwing the optical axis angle adjustment member 17 . FIG. 3 is a perspective view of a part of the illumination device 1 for explaining the fixing structure of the optical axis angle adjustment member 17 to the housing 10. As shown in FIG. As shown in FIG. 3, the optical axis angle adjusting member 17 is screwed to the housing 10 with a screw 21 using the elongated hole 17d and the first screw hole. It is screwed to the housing 10 with screws 25 using two screw holes.

Again referring to FIG. 1 , 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 described above, the spring attachment portion 15b is fixed to the frame 20. As shown in FIG. Therefore, the frame body 20 is fixed to the inner surface of the embedding hole of the ceiling so as not to be relatively movable by the horizontal force that the mounting spring 23 receives from the inner surface of the embedding hole. Since the mounting spring 23 is attached to the frame 20, it rests on the frame 20 and also rests on the embedded hole in the ceiling. 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.

As shown in FIG. 1, in the present embodiment, when the extending direction of the central axis of the frame 20 substantially coincides with the Z direction, the housing 10 is screwed to the right end of the long hole 17d in the plane of the paper with the screws 21. Fixed. While the frame 20 is fixed to the embedding hole using the mounting spring 23, the user applies a force greater than the static friction generated due to the tightening force of the screw 21 to the upper housing fixing portion 17b to the housing 10. Suppose you gave Then, the housing 10 rotates the optical axis angle so that the screw 21 moves to the left in FIG. It rotates with respect to the adjustment member 17 . In other words, as described above, the frame 20 is fixed to the inner surface of the embedding hole so as not to be relatively movable, and the optical axis angle adjusting member 17 is fixed to the frame 20 so as not to be relatively movable. The body 10 is tilted with respect to the frame 20 and thus with respect to the embedding hole. Therefore, after the illumination device 1 is fixed in the embedding hole, the user can adjust the housing 10 to tilt at a desired angle with respect to the embedding hole, and the light source 62 (see FIG. 8) fixed to the housing 10 can be adjusted. The optical axis of the light emitted from the can be tilted by a desired angle with respect to the vertical direction. Therefore, the degree of freedom of the irradiation area can be significantly increased.

Next, the structure for fixing the optical axis angle adjusting member 17 to the housing 10 will be described in more detail. FIG. 4 is a schematic cross-sectional view taken along the line AA of FIG. 1, and is a schematic cross-sectional view of the lighting device 1 including the central axis of the screw 21 and the width direction of the long hole 17d. 5 is a perspective view of a spring washer 56 included in the structure. As shown in FIG. 4, the lighting device 1 includes an annular first resin washer 46, an annular second resin washer 53, an annular metal washer 54, a cylindrical metal spacer 55, and an example of a biasing member. A spring washer 56 is provided as. Each of the first resin washer 46, the second resin washer 53, and the metal washer 54 has a function of dispersing the pressing force, and the metal spacer 55 has a function of ensuring a distance.

As shown in FIG. 4, the housing 10 has a cylindrical inner peripheral surface 10c and a concave portion 10e including an annular stepped portion 10d. The stepped portion 10d extends radially inward from the cylindrical inner peripheral surface 10c. . The metal spacer 55 is fitted in the recess 10e until the one end surface 55a abuts against the stepped portion 10d. Each of the first resin washer 46 , the second resin washer 53 , and the metal washer 54 includes a cylindrical hole having an inner diameter equal to or slightly larger than the outer diameter of the metal spacer 55 . In addition, it is preferable that the first resin washer 46, the second resin washer 53, and the metal washer 54 have the same outer diameter. However, the first resin washer 46, the second resin washer 53, and the metal washer 54 may include two or more washers having different outer diameters.

The first resin washer 46 is sandwiched between the outer surface of the housing 10 and the upper housing fixing portion 17b in a state in which the cylindrical inner peripheral surface of the through hole 46a is fitted onto the metal spacer 55. As shown in FIG. In addition, the second resin washer 53 is positioned opposite to the first resin washer 46 side in the thickness direction of the upper housing fixing portion 17b in a state where the cylindrical inner peripheral surface of the through hole 53a is fitted onto the metal spacer 55. The metal washer 54 contacts the upper housing fixing portion 17b side in the thickness direction of the second resin washer 53 in a state where the cylindrical inner peripheral surface of the through hole 54a is fitted on the metal spacer 55. is in contact with the opposite surface.

As shown in FIG. 5, the spring washer 56 has a structure in which one portion of an annular plain washer is cut and twisted over a predetermined range in the circumferential direction. The spring washer 56 has a structure in which one end portion 56a is displaced to one side in the thickness direction from the center of gravity and the other end portion 56b is displaced to the other side in the thickness direction from the center of gravity. As shown in FIG. 4 , the spring washer 56 is arranged so as to surround the metal spacer 55 on the side opposite to the second resin washer 53 side in the thickness direction of the metal washer 54 . The shaft portion 21a of the screw 21 is fitted into the cylindrical hole of the metal spacer 55, and the male thread portion 21b provided on the tip side of the shaft portion 21a is screwed into the screw hole 10f provided in the housing 10. By this tightening, the spring washer 56 is sandwiched between the bearing surface 21c of the screw 21 and the surface of the metal washer 54 opposite to the second resin washer 53 in the thickness direction. compressed to

Due to this compression, the spring washer 56 is elastically deformed, and the one end 56a and the other end 56b of the spring washer 56 are positioned at the same position in the thickness direction of the spring washer 56. As shown in FIG. After this elastic deformation, one end 56a of the spring washer 56 applies force to one side of the spring washer 56 in the thickness direction indicated by arrow F1 in FIG. 5, and the other end 56b is indicated by arrow F2 in FIG. A force is applied to the other side of the spring washer 56 in the thickness direction. Therefore, after being compressed, the spring washer 56 has the greatest biasing force (pressing force) around the one end 56a and the other end 56b.

By adopting the fixing structure of the optical axis angle adjusting member 17 shown in FIG. 4 and further by providing the recesses 17f and 17g in the elongated hole 17d, excellent effects can be obtained. Next, the effects will be described in detail based on the configuration from which they are derived.

As described above, the illumination device 1 includes the housing 10 , the frame 20 , and the light source 62 arranged within the housing 10 . In addition, the illumination device 1 includes a flat upper housing fixing portion (first fixing portion) 17b including a long hole 17d having recesses 17f and 17g recessed outward in the extending direction at least on one end, and An optical axis angle adjustment member 17 having a lower housing fixing portion (second fixing portion) 17c fixed to the frame 20 is provided. In addition, the illumination device 1 is arranged so as to contact the upper housing fixing portion 17b on at least one side in the thickness direction of the upper housing fixing portion 17b, and is configured with annular first and second resin resins. Washers 46,53 are provided. In addition, the illumination device 1 is arranged on the side opposite to the housing 10 side in the thickness direction of the upper housing fixing portion 17b, and presses the first and second resin washers 46 and 53 against the upper housing fixing portion 17b. It also includes a spring washer (biasing member) 56 that presses the upper housing fixing portion 17b toward the housing 10 side. Further, the illumination device 1 includes a shaft portion 21a having a male screw portion 21b screwed to the housing 10 and passing through the elongated hole 17d and through holes of the first and second resin washers 46 and 53, and a spring washer 56. A screw 21 having a bearing surface 21c that presses toward the upper housing fixing portion 17b is provided.

Therefore, the first and second resin washers 46 and 53 made of soft resin press the upper housing fixing portion 17b while being in contact with the metal plate-like upper housing fixing portion 17b. It is easy to secure sufficient static friction between 46, 53 and upper housing fixing portion 17b. Therefore, when the inclination angle of the housing 10 with respect to the frame 20 is selected and the housing 10 stands still with respect to the upper housing fixing portion 17b, the static frictional force of the housing 10 with respect to the upper housing fixing portion 17b is It can be made large, and the housing 10 can be reliably stopped on the upper housing fixing portion 17b.

Furthermore, since the elongated hole 17d has recesses 17f and 17g that are recessed outward in the extending direction at least on one end, the housing 10 can be smoothly moved relative to the upper housing fixing portion 17b. can. Next, the reason for this will be explained.

FIG. 6A is a plan view showing the positional relationship among the upper housing fixing portion 17b, the second resin washer 53, and the spring washer 56 as viewed from the outside in the thickness direction of the upper housing fixing portion 17b. FIG. 4 is a plan view showing the positional relationship of three parts that can actually occur;

In the present embodiment, the second resin washer 53 is soft and easy to secure sufficient frictional force. Therefore, as shown in FIG. 6(a), when the cut periphery 56c of the spring washer 56 where the pressing force is large overlaps with the long hole 17d when viewed from the thickness direction, the second resin washer 53 is soft. A portion thereof is easily deformed toward the upper housing fixing portion 17b by the pressing force from the periphery 56c of the cut.

Then, as shown in FIG. 6(b), ie, the BB line schematic cross-sectional view of FIG. 6(a), the part 53b of the second resin washer 53 easily enters into the elongated hole 17d by the pressing force. . Therefore, if there are no recesses 17f and 17g shown in FIG. 2 in the long hole of the upper housing fixing portion, even if the screw 21 (see FIG. 3) is moved to the prescribed end position of the long hole, the part 53b will However, it may get caught between the shaft portion 21a of the screw 21 and the end face in the extending direction of the long hole, making it difficult for the screw 21 to reach the specified end position. can be difficult to reach.

On the other hand, in the illumination device 1, since the long hole 17d has the recesses 17f and 17g that are recessed outward at both ends in the extending direction, the part 53b can be pushed into the recesses 17f and 17g. A part 53b can escape to the depressions 17f and 17g. Therefore, the screw 21 can be smoothly and easily moved to the specified end position, so that the operability of adjusting the inclination angle of the housing 10 with respect to the frame 20 can be improved. A specified maximum tilt angle can be easily achieved.

Moreover, the illumination device 1 may include a cylindrical metal spacer 55 into which the shaft portion 21a of the screw 21 is inserted and which is pressed toward the housing 10 by the seat surface 21c.

According to this configuration, by adjusting the axial length of the metal spacer 55, the compression length of the spring washer 56 in the thickness direction (the amount of compression of the spring washer 56 in the thickness direction) can be adjusted. Therefore, it is easy to generate a desired amount of static friction between the housing 10 and the upper housing fixing portion 17b.

Furthermore, the position where the cylindrical metal spacer 55 contacts the extending direction end faces 17h and 17i (see FIG. 2) connected to the depressions 17f and 17g in the long hole 17d is determined by the inclination of the housing 10 with respect to the frame 20. It can be the upper or lower limit of the angle. Therefore, the cylindrical metal spacer 55 having an outer diameter larger than that of the shaft portion 21a of the screw 21 can be used as a member that determines the upper and lower limits of the tilt angle, so that the tilt angle range of the housing 10 with respect to the frame 20 can be determined with high accuracy. Easy to implement. Although the cylindrical metal spacer 55 is used in this embodiment, a cylindrical resin spacer may be used.

In addition, the lighting device 1 includes a second resin washer 53 disposed on the side opposite to the housing 10 side in the thickness direction of the upper housing fixing portion 17 b and a spring washer 56 between the second resin washer 53 and the spring washer 56 . An annular metal washer 54 may be disposed and constructed of metal. Also, the shaft portion 21 a of the screw 21 may pass through the through hole of the metal washer 54 .

According to this configuration, since the second resin washer 53 is sandwiched between the metal washer 54 and the upper housing fixing portion 17b, the metal washer 54 can suppress the bending of the second resin washer 53 . Therefore, since the biting of the part 53b of the second resin washer 53 can be suppressed, the movement of the screw 21 in the long hole 17d can be further smoothed, and the inclination angle of the housing 10 with respect to the frame 20 can be adjusted. operability can be made smoother.

A spring washer 56 having a structure in which an annular plain washer is cut at one point and twisted may be used as a biasing member that presses the first and second resin washers 46 and 53 against the upper housing fixing portion 17b. That is, the spring washer 56 may have one end 56a displaced from the center of gravity to one side in the thickness direction and the other end 56b displaced from the center of gravity to the other side in the thickness direction. Also, the shaft portion 21 a of the screw 21 may pass through a space 71 ( FIG. 5 ) provided in the center of the spring washer 56 .

Since the spring washer 56 has a large biasing force, the use of the spring washer 56 generally tends to reduce the operability of adjusting the angle of the housing with respect to the frame. However, according to the present disclosure, since the long hole 17d has the above-described depressions 17f and 17g, the operability can be improved. Therefore, according to this configuration, not only can a sufficient static frictional force be generated between the housing 10 and the upper housing fixing portion 17b, but also the operability of adjusting the angle of the housing with respect to the frame can be improved. .

Note that the housing 10 may be configured to be tiltable only to one side with respect to the Z direction, or may be configured to be tiltable to both sides with respect to the Z direction. Further, when the housing 10 can be tilted to only one side with respect to the Z direction, the maximum tilt angle may be an angle smaller than 90° on one side with respect to the Z direction. In addition, when the housing 10 can be tilted to both sides with respect to the Z direction, the maximum tilt angle may be any angle smaller than 90° on one side with respect to the Z direction. Any angle less than 180° is acceptable. Further, if the case where the housing 10 is tiltable to both sides with respect to the Z direction will be described as an example, the maximum tilt angle may be, for example, 80° on one side and 160° on both sides with respect to the Z direction. It may be 70° on one side and 140° on both sides. Alternatively, the maximum tilt angle may be 60° on one side and 120° on both sides with respect to the Z direction, or may be 50° on one side and 100° on both sides with respect to the Z direction. Alternatively, the maximum tilt angle may be 45° on one side and 90° on both sides with respect to the Z direction.

Next, a description will be given of the structure of the illumination device 1 that allows the position of the lens 30 in the Z direction to be varied with respect to the light source 62 and enables narrow-angle control of emitted light. FIG. 7 is an exploded perspective view of the main components of the lighting device 1. FIG. 8 is a perspective view showing the light source module 60 arranged on the main surface 24 of the housing 10, and FIG. 9 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. 7 , the illumination device 1 includes a lens 30 , a lens holder 40 and a rotary member 50 in addition to the housing 10 and the frame 20 . Moreover, as shown in FIG. 8 , the illumination device 1 includes a light source module 60 fixed to the main surface of the housing 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 metal wiring of a predetermined pattern. 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. 8, the substrate 61 is housed in, for example, a recess 64 provided on the main surface 24 of the housing 10. As shown in FIG. 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 housing 10 . The substrate holder is fastened and fixed to the main surface 24 of the housing 10 using a screw (not shown) through the screw hole 65, and the substrate 61 is pressed against the main surface 24 by the substrate receiving portion, thereby attaching the substrate 61 to the housing 10. fixed to A mounting plate (not shown) for holding the substrate may be provided, and the mounting plate may be fixed to the main surface of the housing using a substrate holder and screws.

Referring to FIG. 9, lens 30 is arranged closer to the light exit side than light source 62 (see FIG. 8) 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 .

10 is a perspective view of an optical block 70 composed of a lens holder 40 and a lens 30 held therein, FIG. 11 is a perspective view of the lens holder 40, and FIG. 12 is a perspective view of the lens 30. is. As shown in FIG. 10 , 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. 11, the lens holder 40 has three holder locking portions 41 arranged at intervals in the circumferential direction, and each holder locking portion 41 extends in the Z direction. The holder locking portion 41 includes a concave surface 41a convex inward in the R direction, the concave surface 41a faces outward in the R direction and extends in the Z direction. The role of the holder 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. 12, the lens 30 has a shape that widens downward 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. 11), 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. 10 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. 11, 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.

13 is a perspective view of the rotating member 50. FIG. The rotating member 50 is preferably made of a resin material having a spring property such as polycarbonate, but may be made of a hard resin material or a metal material. As shown in FIG. 13, the rotating member 50 is a substantially cylindrical member and has two inclined grooves 51 spaced apart in the θ direction. The inclined 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. 14, 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. 14 from the state shown in FIG. 14 , 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 manner, the Z-direction position of the lens 30 with respect to the rotating member 50 can be adjusted.

Next, a mounting structure of the rotary member assembly 80 to the housing 10 will be described. As shown in FIG. 7, the housing 10 has a two-part structure and includes a first member 10a and a second member 10b. 15 is a perspective view of the first member 10a of the housing 10. FIG. As shown in FIG. 15, the housing 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 provided on a first stationary portion stationary with respect to the light source 62, and constitutes a first stationary portion-side locking portion. 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. 15 has two columnar portions 18, and the second member 10b has one columnar portion (not shown).

The convex surfaces 18 a of the three columnar portions 18 are engaged with the concave surfaces 41 a (see FIG. 14) of the three holder engaging portions 41 of the lens holder 40 included in the rotary member assembly 80 . After that, as shown in FIG. 16, that is, a perspective view of the lighting device 1 when viewed from an angle different from that in FIG. 80 is attached to the housing 10 and integrated with the housing 10 .

As shown in FIG. 9, 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 housing 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 10a and the second member 10b are integrated and the housing 10 and the rotating member assembly 80 are integrated. When viewed in the Z direction, the first annular flange portion 57 has a portion that overlaps the annular projecting portion 19, and the annular end face 14 located on the lower side in the Z direction of the housing 10 overlaps the second annular flange portion 58. have a part. As shown in FIG. 9, 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 housing 10 is restricted by the annular protrusion 19 , and the upward movement of the rotating member 50 relative to the housing 10 is restricted by the annular end surface 14 of the housing 10 . As a result, the rotary member 50 can rotate relative to the housing 10 in a state where the Z-direction position does not substantially change with respect to the housing 10 . Further, since the slight gap is present, the rotating member 50 can be smoothly rotated with respect to the housing 10 . The Z-direction position of the rotating member 50 with respect to the housing 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 housing 10 does not substantially change.

Again referring to FIG. 13, the rotating member 50 has an annular grip portion 52 on the lower side in the Z direction for a person to grip and rotate it. As shown in FIG. 17 , that is, a perspective view of the illumination device 1 viewed from below, there is a gap between the housing 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 housing 10. .

In the above configuration, assume that a person uses the grip portion 52 to rotate the rotating member 50 with respect to the housing 10 . Then, since the optical block 70 cannot rotate with respect to the housing 10 due to the engagement of the holder engagement portion 41 with the columnar portion 18, the optical block 70 does not rotate together with the rotation of the rotating member 50. A 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.

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 case where the annular metal washer 54 exists between the spring washer 56 and the second resin washer 53 has been described. However, as shown in FIG. 18(a), that is, a schematic cross-sectional view corresponding to FIG. 4 of the illumination device 101 of the modified example, the ring-shaped metal washer is omitted, and the spring washer 56 extends over the second resin washer 53. It may be configured to press directly against the upper housing fixing portion 17b.

Moreover, the case where the illumination device 1 has the cylindrical metal spacer 55 in which the shaft portion 21a of the screw 21 is fitted and the compression amount of the spring washer 56 can be precisely set has been described. However, as shown in FIG. 18B, that is, a schematic cross-sectional view corresponding to FIG. 4 of a lighting device 201 of another modification, the lighting device 201 has a cylindrical shape in which the shaft portion 21a of the screw 21 is fitted. spacer.

Also, the case where the biasing member is the spring washer 56 having a structure in which one portion of the annular flat washer is cut and twisted has been described. However, the biasing member may be a wave washer 356, shown in side view in FIG. 19(a) and shown in plan view in FIG. 19(b). Alternatively, the biasing member may be a disc spring washer 456 shown in side view in FIG. 20(a) and in plan view in FIG. 20(b). Alternatively, the biasing member may be a toothed washer, a spherical washer, a lock washer, a tapered washer, or the like.

Moreover, although the case where the recesses 17f and 17g are provided on both sides of the elongated hole 17d in the extending direction has been described, the recesses may be provided only on one side of the elongated hole in the extending direction. Alternatively, the annular first resin washer 46 is provided closer to the housing 10 than the upper housing fixing portion 17b, and the annular second resin washer 53 is provided closer to the biasing member than the upper housing fixing portion 17b. I explained the case where However, the resin washer may be provided on at least one side in the thickness direction of the first fixing portion so as to be in contact with the first fixing portion. Either one of may be omitted.

Also, the case where the rotating member 50 has the inclined groove 51 and the optical block 70 has the fitting claw 48 has been described. 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 rotating 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 that fits into the inclined groove 51 is the plate-shaped fitting claw 48 has been described. However, 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.

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.

Further, although the lens holder 40 has three holder locking portions 41 spaced apart from each other in the θ direction, the lens holder may have one or more holder locking portions. It may have two or more holder locking portions spaced apart from each other in the θ direction. Further, although the housing 10 has three columnar portions 18 (first stationary portion-side locking portions) spaced apart from each other in the θ direction, the housing 10 has one or more first It may have a stationary portion-side locking portion, and may have two or more first stationary portion-side locking portions spaced apart from each other in the θ 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, or may have two or more lens fitting portions spaced apart from each other in the θ direction. Also, the lens may have one or more holder fitting portions, or may have 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, the rotating member may rotate (360/N) degrees with respect to the housing. With the inclined grooves described above, it is not necessary for the rotating member to rotate 360° with respect to the housing.

Also, the case where the lens holder 40 has the holder 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 housing. For example, a projecting portion extending radially outward is provided on the upper side in the height direction of the lens holder, and the distal end of the projecting portion on the radially outward side is accommodated in a recess provided on the inner surface of the housing. Co-rotation of the holder with respect to the housing may be prevented. Such locking can be realized by dividing the housing as in this embodiment.

Also, the case where the optical block 70 cannot rotate with respect to the housing 10 due to the engagement of the holder engagement portion 41 with 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 positioned below it in the Z direction, and the annular protruding portion 19 of the housing 10 is attached to the first annular flange portion 57 by 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 housing 10 is substantially unchanged.

However, in a configuration different from the configuration described in the embodiment, the rotating member may be rotatable with respect to the housing 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 housing may not have an annular structure and may be non-annular.

Also, the case where the rotating member 50 has two annular flange portions and the housing 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 housing has two annular flanges that protrude radially inward and have 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 housing while its Z-direction position remains substantially unchanged.

Also, a case has been described in which even if the position of the lens 30 in the optical axis direction changes, the Z-direction dimension of the housing 10 of the lighting device 1 does not change, and the lighting device 1 is excellent in appearance. However, the Z-direction dimension of the housing may be changed when the position of the lens in the optical axis direction is changed. Moreover, although the lighting device 1 is capable of changing the position of the lens 30 in the optical axis direction, the lighting device may not be able to change the position of the lens 30 in the optical axis direction.

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. In short, the lighting device includes a housing, a frame, a light source disposed in the housing, and a flat plate-shaped first hole having a recess extending outward in the extending direction at least at one end. an optical axis angle adjusting member having a first fixing portion and a second fixing portion fixed to a frame; and an annular resin washer arranged on the side opposite to the housing side in the thickness direction of the first fixing portion, pressing the resin washer against the first fixing portion and pressing the first fixing portion against the housing side. a screw having a bearing surface that presses the biasing member toward the first fixing portion, a shaft portion that has a male threaded portion that is screwed into the housing and passes through the elongated hole and the through hole of the resin washer and , the lighting device may have any structure.

Reference Signs List 1, 101, 201 lighting device 10 housing 17 optical axis angle adjusting member 17b upper housing fixing portion (first fixing portion) 17c lower housing fixing portion (second fixing portion) 17d long hole 17f, 17g recess 20 frame body 21 screw 21a shaft portion of screw 21b external thread portion of screw 21c bearing surface of screw 46 first annular resin washer 53 second annular resin washer 54 circle Annular metal washer 55 Cylindrical metal spacer 56 Spring washer (biasing member) 56a One end of spring washer 56b The other end of spring washer 62 Light source 71 Space provided in the center of spring washer 356 Wave washer (biasing member), 456 Disc spring washer (biasing member).

Claims (4)

a housing;
a frame;
a light source disposed within the housing;
an optical axis angle adjustment member having a flat plate-shaped first fixing portion including a slot having a recess recessed outward in the extending direction at least one end thereof, and a second fixing portion fixed to the frame; ,
an annular resin washer made of resin, disposed on at least one side of the first fixing portion in the thickness direction so as to be in contact with the first fixing portion;
A biasing member disposed on the side opposite to the housing side in the thickness direction of the first fixing portion to press the resin washer against the first fixing portion and press the first fixing portion toward the housing. and,
a screw having a shaft portion having a male thread portion screwed to the housing and passing through the elongated hole and the through hole of the resin washer, and a bearing surface for pressing the biasing member toward the first fixing portion side; ,
A lighting device. 2. The lighting device according to claim 1, further comprising a cylindrical spacer into which said shaft portion is inserted and which is pressed against said housing by said seat surface. the resin washer disposed on the side opposite to the housing side in the thickness direction of the first fixing portion;
an annular metal washer made of metal and disposed between the resin washer and the biasing member;
The lighting device according to claim 1 or 2, wherein the shaft portion passes through the through hole of the metal washer. The biasing member is a spring washer having a structure in which one portion of an annular flat washer is cut and twisted,
One end of the spring washer is displaced from the center of gravity to one side in the thickness direction, and the other end is displaced from the center of gravity to the other side in the thickness direction,
4. The lighting device according to any one of claims 1 to 3, wherein the shaft passes through a space provided in the center of the spring washer.

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