JP2015111519A - Illumination device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an annular illumination device which can be downsized and has no light-emitting unevenness.SOLUTION: An illumination device has a substrate, a light-emitting element, and a cylindrical light-guiding body. The light-guiding body is equipped with a V-shaped notch, a light-incident portion formed under the notch, a recessed portion, a light-guiding portion, and a reflecting portion formed on the whole of a lower surface of the light-guiding portion. The light-emitting element has a first light-emitting element disposed immediately under the light-incident portion, and a second light-emitting element. The second light-emitting element is on the inner side in a radial direction than the first light-emitting element, and disposed so as to deviate to the inner side in the radial direction from the first light-emitting element. The recessed portion is formed so as to be thicker on the inside in the radial direction than the light-guiding portion; and has a first refracting portion for refracting light emitted from the second light-emitting element to the outside in the radial direction, and a second refracting portion for guiding the light refracted by the first refracting portion to the light-guiding portion. The first light-emitting element emits light to the light-guiding portion without passing through the first refracting portion and the second refracting portion.

Description

  The present invention relates to an illuminating device, and more particularly, to an illuminating device that can emit light in two colors and in an annular shape without unevenness.

  Operation members such as push buttons and jog dials provided on the operation panel of the driver's seat of an automobile are provided with a translucent ring illumination device that illuminates the operation members from the inside in order to increase the visibility of the operation position. There is.

  Since the operation members for operating a plurality of functions are often concentrated on the surface of such an operation panel, the illumination device must be small in size when viewed from the upper surface of the operation member. Is preferred.

  In the illumination device, it is preferable that the entire surface of the illumination target member is illuminated with uniform brightness from the viewpoint of improving the visibility of the operation position and improving the appearance image.

  As a conventional illumination device, an illumination device 930 in which a V-shaped notch is provided in a part of an annular light guide described in Patent Document 1 is known.

  FIG. 5 is an exploded perspective view of a conventional lighting device 830.

  A conventional lighting device 830 includes a casing (not shown), a light source 831 provided inside the casing, a curved light guide 832 attached to the surface of the casing, and a curved guide outside the casing. A light diffusing unit 850 that covers the light body 832. The curved light guide 832 is formed in a ring shape. A notch 847 is formed on the upper surface of the curved light guide 832, both side surfaces of the notch 847 are reflecting surfaces 837 and 838 curved in a convex shape, and the surface opposite to the bottom 848 of the notch 847 is the incident surface. 834.

  The light emitted from the light source 831 enters the curved light guide 832 from the incident surface 834, is refracted by the reflection surfaces 837 and 838 provided on both side surfaces of the notch 847, and then the curved light guide 832. The inside travels along the outer shape and is ejected from the notch 847 to above the lighting device 830.

JP 2010-086889 A

  However, when an illumination device that emits two colors of light is designed on the basis of the configuration of the conventional illumination device 830, there is a problem that the size of the light guide becomes large, and there is a need for improvement.

  FIG. 6 is an exploded perspective view of a structure (lighting device 930) in which a conventional lighting device is changed to emit two colors. As shown in FIG. 6, the conventional illumination device is modified to emit two colors, as shown in FIG. 6, in which first light emitting elements 931a and second light emitting elements 931b are arranged in two rows along the radial direction. Can be considered. When such a configuration is used, the curved light guide 932 needs to have a large width in accordance with the arrangement of the first light emitting element 931a and the second light emitting element 931b.

  However, if the width of the curved light guide 932 is increased, the size of the curved light guide 932 as viewed from above increases, so that the illumination device developed based on the shape of the lighting device 930 is operated. There was a risk of squeezing the dimensions of the panel or impairing the appearance.

  The present invention solves the above-described problems and provides an illumination device that can emit light in two colors and can be miniaturized and emits annular light without unevenness.

  In order to solve this problem, the illumination device according to claim 1 has a cylindrical shape made of a substrate, a light emitting element placed on the substrate, and a translucent material disposed above the substrate and the light emitting element. The light guide has a V-shaped notch that is a reflective surface formed on a part of the upper portion of the light guide, and a light emitting element from the lower portion of the light guide below the notch Projecting downward and facing the upper surface of the light emitting element, a concave portion having a refracting portion that changes the direction of light incident from the light incident portion, and a cylindrical shape that propagates light And a reflecting portion provided on the entire lower surface of the light guiding portion, wherein the light emitting element is a first light source comprising a light source of a first color disposed immediately below the light incident portion. One light emitting element and a second light emitting element composed of a light source of a second color, the first light emitting element being based on a cylindrical center formed by the light guide The second light emitting element is arranged radially outside and arranged side by side with the second light emitting element in the radial direction, and the concave portion is formed thicker inside the light guiding part in the radial direction, The light emitting element is displaced from the light guide portion inward in the radial direction, and the concave portion is a first refracting portion that refracts light emitted from the second light emitting element outward in the radial direction, and light refracted by the first refracting portion. And a second refraction part for guiding the light to the light guide part, and the first light emitting element is characterized by emitting light to the light guide part without passing through the first refraction part and the second refraction part.

  The illumination device according to claim 2 is provided with two or more sets of light-emitting elements each including a first light-emitting element and a second light-emitting element, as well as a notch, a light incident part, a first refraction part, and a second light-emitting part. A plurality of refracting portions are provided corresponding to the number of sets of light emitting elements, and the light guide is characterized by being equally divided and provided corresponding to the number of sets of light emitting elements.

  The illumination device according to claim 3 has a plurality of columnar portions made of the same material as the light guide and integrally formed on a part of the lower surface of the light guide, and the plurality of columnar portions are formed on the substrate. It is characterized in that it is supported in contact with the upper surface of the substrate.

  The illumination device according to claim 4 is characterized in that the columnar part is provided at a position where the distances from the plurality of first light emitting elements are equal.

  In the illumination device according to claim 5, the substrate is formed in a circular shape having substantially the same shape as the outer periphery of the light guide, and a plurality of fixing portions extending downward are provided on the outer surface of the light guide. The length of the fixed portion formed from the lower surface of the light guide is obtained by adding the distance from the lower surface of a part of the light guide provided in contact with the fixed portion to the upper surface of the substrate and the thickness of the substrate. In addition, the protrusion has a protruding portion that protrudes radially inward at the tip, and the protruding portion engages with the lower surface of the substrate.

  According to the first aspect of the present invention, even when two light emitting elements are arranged along the cylindrical radial direction formed by the light guide, the light is refracted by the light guide by providing the refracting part in the recess. It becomes possible to enter the light. Therefore, it is possible to guide light of two colors to the cylindrical light guide path while keeping the light guide body and the illumination device small by only giving the thickness to the concave portion. Further, even when two colors of light are emitted, the light of the two light emitting elements arranged in the radial direction can be reliably guided to the cylindrical light guide, so that unevenness of light does not occur.

  According to the second aspect of the present invention, since the number of light incident portions on the light guide increases, unevenness of the light emitted from the light guide is reduced, so that it is easy to recognize the appearance during light emission. And the designability is improved.

  According to the invention of claim 3, since the distance between the substrate and the light guide in the vertical direction is constant, the distance between the upper surface of the light emitting element and the light guide is constant, and the light incident on the light guide The optical path is stable. Thereby, since the light emitted from the light guide is stabilized, the ease of recognizing the appearance at the time of light emission and the design are improved.

  According to the invention of claim 4, unevenness in light output from the upper surface of the light guide, which is caused by part of light leaking from the joint surface between the light guide and the columnar portion, is a cylindrical shape formed by the light guide. Symmetric with respect to the center of the circle. As a result, the light emitted from the illumination device becomes regular, and the ease of recognizing the appearance at the time of light emission and the design are improved.

  According to the invention of claim 5, since the position of the substrate and the light guide can be fixed at the distance abutted by the columnar part, the optical path of the light incident on the light guide is stabilized. Thereby, since the light emitted from the light guide is stabilized, the ease of recognizing the appearance at the time of light emission and the design are improved.

  As described above, according to the present invention, it is possible to provide a cylindrical illumination device that has two emission colors, can be reduced in size, and does not cause uneven emission.

It is a top view of the switch provided with the illuminating device of 1st Embodiment of this invention, and the apparatus incorporating the switch. It is an upper perspective view of the illuminating device of 1st Embodiment. It is a top view of the illuminating device of 1st Embodiment. It is a side view of the illuminating device of 1st Embodiment. It is a disassembled perspective view of the conventional illuminating device. It is the disassembled perspective view of the structure which changed the conventional illuminating device so that light emission of two colors might be carried out.

[First Embodiment]
Hereinafter, the illuminating device 1 of this invention is demonstrated with reference to FIGS. FIG. 1 is a top view of a switch 101 including the illumination device 1 according to the first embodiment and a device incorporating the switch 101. FIG. 2 is an upper perspective view of the illumination device 1 according to the first embodiment. FIG. 3 is a top view of the illumination device 1 according to the first embodiment. FIG. 4 is a side view of the illumination device 1 according to the first embodiment.

  The illumination device 1 of the first embodiment is a part of a circular switch 101 as shown in FIG. The switch 101 is operated from above.

  As shown in FIG. 1, the illumination device 1 is circular like the switch 101 when viewed from above, and emits the same circular light as the outer periphery of the switch 101 upward. Therefore, when viewed from above, the outer shape of the switch 101 is easily visible.

  2 and 3, the illumination device 1 includes a circular substrate 10, two first light emitting elements 21 disposed on the upper surface of the substrate 10 so that the light emitting surface is on the upper side, and a first light emission. And two second light emitting elements 22 provided side by side with the elements. A cylindrical light guide 30 having an outer periphery that is substantially the same shape as the circle formed by the substrate 10 is disposed above the substrate 10, the first light emitting element 21, and the second light emitting element 22. Also, a part of the lower surface of the concave portion 32 (light incident portion 35) that is recessed as a part of the light guide 30 in the cylindrical radial direction and has a wall thicker than the surrounding so that the inner wall surface protrudes. ) And the upper surfaces of the first light emitting element 21 and the second light emitting element 22 are provided to face each other, and light from the first light emitting element 21 and the second light emitting element 22 is guided through the recess 32. 30 is made to enter the inside.

  The substrate 10 and the light guide 30 are partly engaged and partly abutted so that the distance is adjusted and fixed at a predetermined position.

  In addition, an electric circuit including a power source (not shown) is provided on the upper surface, side surface, or lower surface of the substrate 10, and terminals of the electric circuit are exposed from a part of the upper surface of the substrate 10. Further, the electric circuit arbitrarily supplies power to the light emitting element when electrically connected to the light emitting element.

  The substrate 10 is a flat plate and has a circular shape having substantially the same shape as the outer periphery of the light guide 30 as shown in FIG. Further, as described above, the substrate 10 is disposed below the light guide 30. Further, as described above, two first light emitting elements 21 and two second light emitting elements 22 are arranged on a part of the upper surface of the substrate 10. Further, the lower surface of the first light emitting element 21 and the lower surface of the second light emitting element 22 are in contact with a part of the upper surface of the corresponding substrate 10, and a part of the contact is fixed by solder. Further, as described above, an electric circuit (not shown) is provided on the upper surface, side surface, or lower surface of the substrate 10, the terminals of the electronic circuit exposed on the upper surface of the substrate 10, the first light emitting element 21, and the like. The contact point with the second light emitting element 22 is electrically joined by solder. Further, as shown in FIG. 2, it corresponds to the lower surface of a plurality of cylinders (columnar portions 42) having the same length and projecting downward from a part of the lower surface of the light guide 30. A part of the upper surface of the substrate 10 is in contact. Further, as shown in FIG. 4, a part of the side surface of the plate-like column (fixed portion 44) provided so as to protrude downward from the part of the side surface of the light guide 30 and the corresponding substrate. A part of the side surface of 10 is in contact. Further, a part of the upper surface of the protruding part 46 that is provided so as to protrude from the lower end of the fixed part 44 toward the inner side of the circular radial direction formed by the substrate 10, a part of the lower surface of the corresponding substrate 10, Are engaged. A synthetic resin is preferably used for the substrate 10. However, the substrate 10 holds the light guide 30, the first light emitting element 21, and the second light emitting element 22, and has a strength that does not deform when the substrate 10 and the light guide 30 are engaged with each other. It may be made of a material having strength as a part, and is not limited to a synthetic resin.

  The first light-emitting element 21 is a light-emitting element having a rectangular parallelepiped shape (hexahedron with all surfaces being rectangular). Further, as described above, the first light emitting element 21 is disposed with the light emitting surface facing upward. Further, the contact points between the lower surface of the first light emitting element 21 and the corresponding substrate 10 are provided in contact with each other, and a part of the contact points is fixed with solder. Further, as described above, an electric circuit (not shown) is provided on the upper surface, side surface, or lower surface of the substrate 10, the terminals of the electronic circuit exposed on the upper surface of the substrate 10, the first light emitting element 21, and the like. The contacts of, are electrically joined by solder. Further, the first light emitting element 21 is disposed along the cylindrical outer periphery formed by the light guide 30. In addition, the first light emitting element 21 and the second light emitting element 22 are arranged side by side, and the first light emitting element 21 is arranged immediately below the cylindrical shape formed by the light guide 30. Further, as shown in FIG. 2 or FIG. 3, two first light emitting elements 21 are provided. Each of the first light emitting elements 21 is arranged in two, and these are arranged at symmetrical positions with respect to the cylindrical center formed by the light guide 30. In addition, a light guide 30 is disposed above the first light emitting element 21, and protrudes from the upper surface (light emitting surface) of the first light emitting element 21 to the inside of the cylindrical shape formed by the light guide 30. And a part of the lower surface of the recessed portion 32 (light incident portion 35) is provided to face each other. As the first light emitting element 21, a white light emitting element is used. However, the 1st light emitting element 21 should just be a light emitting element of the luminescent color which can be recognized with the naked eye, and is not restricted to a light emitting element of white light.

  The second light-emitting element 22 is a light-emitting element having a rectangular parallelepiped shape (hexahedron with all surfaces being rectangular). Further, as described above, the second light emitting element 22 is arranged with the light emitting surface facing upward. Further, the contact points between the lower surface of the second light emitting element 22 and the corresponding substrate 10 are provided in contact with each other, and a part of the contact points is fixed with solder. Further, as described above, an electric circuit (not shown) is provided on the upper surface, side surface, or lower surface of the substrate 10, the terminals of the electronic circuit exposed on the upper surface of the substrate 10, the second light emitting element 22, The contacts of, are electrically joined by solder. Further, the second light emitting element 22 is disposed along a cylindrical outer periphery formed by the light guide 30. The first light emitting element 21 and the second light emitting element 22 are arranged side by side, and the second light emitting element 22 is in a cylindrical radial direction formed by the light guide 30 with respect to the first light emitting element 21. It is arranged to be shifted to the inner side. Further, as shown in FIG. 2 or FIG. 3, two second light emitting elements 22 are provided. In addition, two second light emitting elements 22 are arranged, and these are arranged at symmetrical positions with respect to the cylindrical center formed by the light guide 30. A light guide 30 is disposed above the second light emitting element 22, and is thicker on the upper surface (light emitting surface) of the second light emitting element 22 and on the inner side of the cylindrical shape formed by the light guide 30. A part of the lower surface of the provided recess 32 (light incident part 35) is provided so as to face. The second light emitting element 22 is an amber light emitting element. However, the second light-emitting element 22 may be a light-emitting color that can be recognized with the naked eye and may have a light-emitting color different from that of the first light-emitting element 21, and is not limited to a light-emitting element with amber light. Absent.

  As described above, the light guide 30 has a cylindrical shape and is disposed above a part of the substrate 10 and the first light emitting element 21 and the second light emitting element 22.

  Further, as shown in FIG. 3, the cylindrical shape formed by the light guide 30 has a cylindrical light guide portion 31 and a portion that is recessed inward in the radial direction and the inner wall surface protrudes from the periphery. And a recess 32 provided with a thick wall. In addition, the recesses 32 are provided in the same number as the number of sets (two sets) in which the first light emitting element 21 and the second light emitting element 22 are provided.

  Further, a step-like reflecting surface (reflecting portion 33) that is serrated is provided on the lower surface of the light guide portion 31.

  Moreover, the upper surface (light-emitting part 34) of the light guide part 31 is provided horizontally as shown in FIG. In addition, when a part of the light guided through the light guide 30 is incident at an incident angle smaller than the critical angle (the smallest incident angle at which total reflection occurs), the light exiting unit 34 Part or all of the light is emitted upward from the light guide 30.

  Moreover, the upper surface and side surface of the light guide part 31 are mirror surfaces, and totally reflect light incident at an incident angle larger than the critical angle.

  Further, as shown in FIG. 4, a part of the lower portion of the recess 32 protrudes downward from the light guide 30 toward the upper surface (light emitting surface) of the first light emitting element 21, and the first A surface (light incident part 35) wider than the upper surface of the first light emitting element 21 facing the upper surface of the light emitting element 21 is provided. At this time, the light incident portion 35 is formed wide toward the inner side in the radial direction of the cylinder formed by the light guide 30 so as to face the upper surface of the second light emitting element 22. Further, the light incident part 35 transmits a part or all of the light incident at an angle close to the vertical, and enters the light guide 30. Further, a step-like reflecting surface (serration processing) is provided on the surface of the lower surface of the concave portion 32 other than the light incident portion 35.

  Further, as shown in FIG. 4, incident light from the first light emitting element 21 and the second light emitting element 22 is reflected on the upper surface of the concave portion 32 so that the direction of the light is a cylindrical shape formed by the light guide 30. A V-shaped notch 36 having a mirror surface that changes in a direction orthogonal to the radial direction is provided. Further, the V-shaped bottom 36a of the notch 36 has a slightly rounded U-shape, and from the critical angle of the V-shaped bottom 36a from below to above the V-shaped bottom 36a. In addition, part or all of light incident at a small incident angle is transmitted upward. In addition, the angle of the light transmitted through the V-shaped bottom 36a is widened by a U-shape so that the light is uniformly emitted above the notch 36. As shown in FIG. 3, when viewed from above, the V-shaped bottom 36a, the center of the first light emitting element 21, and the center of the second light emitting element 22 are disposed so as to overlap each other.

  Further, as shown in FIG. 3, a part of the side surface of the concave portion 32 on the inner wall side of the cylinder reflects the light incident from the second light emitting element 22 and reflected by the end surface of the notch 36. The first refracting portion 37 is provided to change the direction of the light source to the direction of the cylindrical outer wall formed by the light guide 30.

  Further, as shown in FIG. 3, the light reflected by the first refracting portion 37 is further reflected on a part of the side surface on the outer wall side of the concave portion 32, and the direction of the light is changed to the cylindrical light guide portion 31. A second refracting unit 38 that changes the direction of the light and makes the light incident on the light guide unit 31 is provided. Further, the second refracting portion 38 is provided only in a portion where the light reflected by the first refracting portion 37 is incident on the outer wall of the cylinder formed by the light guide 30 at an angle smaller than the critical angle.

  In addition, as shown in FIG. 2, the light guide 30 has a columnar column (columnar portion 42) having the same length protruding downward from the light guide 30 from a part of the lower surface of the light guide 30. Two are provided. The light guide 30 and the columnar part 42 are integrally formed.

  Further, as shown in FIG. 3, the columnar portion 42 is provided so as to protrude from a part of the lower surface of the light guide 30. Moreover, the columnar part 42 is arrange | positioned along the cylindrical shape which the light guide 30 makes, as shown in FIG. 2 or FIG. Two columnar portions 42 are provided. Further, the two columnar portions 42 are disposed at positions where the distances are equal from the plurality (two) of the first light emitting elements 21. Here, it is preferable that the two columnar portions 42 be arranged at a position where the influence on the light traveling in the light guide 30 is the smallest. For example, the first light emission among the reflecting portions 33 formed in a step shape. It is preferably formed at a position farthest from the element.

  Further, each columnar part 42 is formed at the same height, and the lower surface of the columnar part 42 is abutted against the upper surface of the substrate 10, thereby making the distance between the substrate 10 and the light guide 30 constant and guiding them. The light body 30 is supported. Thus, the substrate 10 and the light guide 30 are held so as not to approach a certain distance or less.

  Further, as shown in FIG. 2 or 4, the light guide 30 has a plurality of flat pillars (fixed portions 44) that protrude downward from the light guide 30 from a part of the side surface of the light guide 30. Is provided. Further, as shown in FIG. 4, the length of the fixing portion 44 is determined by the distance from a part of the lower surface of the light guide 30 provided in contact with the fixing portion 44 to the substrate 10 and the thickness of the substrate 10. It is formed to the added length. In addition, a part of the side surface of the lower portion of the fixing portion 44 and a part of the side surface of the substrate 10 are in contact with and engaged with each other.

  A projecting portion 46 is provided extending from the lower end of the fixed portion 44 and extending from the fixed portion 44. Further, as shown in FIG. 4, a part of the protruding portion 46 protrudes inward in the circular radial direction formed by the substrate 10. Further, a slope (slope 46a) shown in FIG. 4 is provided on a part of the lower surface of the protrusion 46 protruding inward in the circular radial direction.

  In addition, a part of the upper surface protruding inward in the radial direction of the protruding part 46 and a part of the outer periphery of the lower surface of the corresponding substrate 10 are in contact with and engaged with each other.

  The light guide 30, the fixed portion 44, and the protruding portion 46 are made of the same material and are integrally formed.

  A transparent synthetic resin is preferably used for the light guide 30. However, the light guide 30 can enter the light emitted from the first light emitting element 21 and the second light emitting element 22 without loss from the light incident portion 35, and the light guide 30 without loss of the light. The inside of the light guide formed by can be guided. Moreover, what is necessary is just to consist of the material which can emit the light from the light emission part 34, and is not restricted to a transparent synthetic resin.

(Operation of the first embodiment)
Next, the operation of the illumination device 1 according to the present invention will be described.

(Operation of the first embodiment; light emission of the first color)
The illumination device 1 according to the first embodiment includes two first light emitting elements 21, and white light is emitted toward the light incident part 35 when the first light emitting elements 21 emit light. Further, the light incident part 35 and the light emitting surface of the first light emitting element 21 are provided to face each other. At this time, since the light guide 30 is made of a transparent synthetic resin, the light emitted from the first light emitting element 21 enters the light guide 30.

  In addition, the light which entered into the light guide 30 from the 1st light emitting element 21 is called 1st light for convenience.

  The first light is incident on the lower surface of the notch 36. A part of the first light is incident on the V-shaped bottom 36a.

  Also, the V-shaped bottom 36a has a slightly rounded U shape. Further, since the V-shaped bottom 36a is provided immediately above the first light emitting element 21, the incident angle of the first light incident on the V-shaped bottom 36a is small. As a result, when a part of the first light passes through the V-shaped bottom 36a, the light is refracted by the U-shape, so that the angle of the light spreads uniformly above the notch 36. The light is emitted upward from the notch 36.

  Moreover, since the upper surface and the side surface of the light guide 30 are mirror surfaces, the first light other than the light incident on the V-shaped bottom 36a is totally reflected by the notch 36, and the direction is changed. The light is guided while repeating irregular reflection in the interior of 31.

  In addition, on the lower surface of the light guide portion 31, a reflection portion 33 is formed by performing stepped serration processing on one surface. A part of the first light guided while being irregularly reflected inside the light guide unit 31 is changed in direction to an angle closer to the upper side of the light guide 30 by the reflection unit 33 and enters the light output unit 34. Further, when the light is incident on the light output part 34 at an angle smaller than the critical angle of the light output part 34, part or all of the light is emitted upward from the light output part 34. By repeating this over the entire light guide unit 31, the first light is uniformly emitted from the front surface of the light output unit.

  Further, the light exiting portion 34 is the upper surface of the light guide portion 31, the notch 36 is the upper surface of the recess portion 32, and the light guide portion 31 and the recess portion 32 constitute a cylindrical light guide. . In addition, since the emission color of the first light emitting element 21 is white, when the first light emitting element 21 emits light, annular white light having no light emission unevenness is emitted above the illumination device 1.

(Operation of the first embodiment; light emission of the second color)
In addition, the illumination device 1 includes two second light emitting elements 22, and when the second light emitting elements 22 emit light, amber light is emitted toward the light incident portion 35. In addition, since the light incident part 35 and the light emitting surface of the second light emitting element 22 are provided facing each other, and the light guide 30 is made of a transparent synthetic resin, the light emitted from the second light emitting element 22 is The light enters the light guide 30.

  In addition, the light which entered into the light guide 30 from the 2nd light emitting element 22 is called 2nd light for convenience.

  The second light is incident on the lower surface of the notch 36. A part of the second light is incident on the V-shaped bottom 36a.

  Also, the V-shaped bottom 36a has a slightly rounded U shape. Further, since the V-shaped bottom 36a is provided immediately above the second light emitting element 22, the incident angle of the second light incident on the V-shaped bottom 36a is small. As a result, when the second light passes through the V-shaped bottom 36a, the light is refracted by the U-shape, so that the angle of the light spreads uniformly above the notch 36 while the notch is notched. Light is emitted upward from 36.

  Further, the second light other than the light incident on the V-shaped bottom 36a is totally reflected by the notch 36, changes its direction, enters the first refracting portion 37, and is reflected. Further, the second light is reflected by the first refracting portion 37, so that the direction of the second light changes toward the cylindrical outer wall formed by the light guide 30. The second light reflected by the first refracting portion 37 and changed in direction toward the cylindrical outer wall formed by the light guide 30 is incident on the second refracting portion 38 or the cylindrical outer wall. The second light is reflected by the second refracting portion 38 or the cylindrical outer wall, and changes its direction in the direction along the light guide portion 31.

  Further, the second light is reflected on the surfaces of the notch 36, the first refracting portion 37, and the second refracting portion 38 shown in FIGS. 3 and 5, so that the optical path changes three-dimensionally. Then, the light enters the light guide path 31 from the recess 32. In addition, the direction of the second light is changed in a direction along the shape of the light guide path 31 by being reflected by the surfaces of the notch 36, the first refracting portion 37, and the second refracting portion 38.

  In addition, since the upper surface and the side surface of the light guide portion 31 are mirror surfaces, the second light is guided while repeating irregular reflection inside the light guide portion 31.

  In addition, on the lower surface of the light guide portion 31, a reflection portion 33 is formed by performing stepped serration processing on one surface. A part of the first light guided while being irregularly reflected inside the light guide unit 31 is changed in direction to an angle closer to the upper side of the light guide 30 by the reflection unit 33 and enters the light output unit 34. In addition, part or all of the light is incident on the light exiting portion 34 at an angle smaller than the critical angle of the light exiting portion 34, passes through the light exiting portion 34, and exits above the light guide portion 31. By repeating this over the entire light guide unit 31, the second light is emitted uniformly from the front surface of the light output unit.

  Further, the light exiting portion 34 is the upper surface of the light guide portion 31, the notch 36 is the upper surface of the recess portion 32, and the light guide portion 31 and the recess portion 32 constitute a cylindrical light guide. . In addition, since the emission color of the second light emitting element 22 is amber, when the second light emitting element 22 emits light, an annular amber light without unevenness in emission is emitted above the illumination device 1.

(Operation of the first embodiment; fixing of relative position of each part and its influence)
When the illumination device 1 is engaged from a state where the substrate 10 and the light guide 30 are divided, the substrate 10 and the light guide 30 come close to each other, and a part of the inclined surface 46a and the upper surface of the substrate 10 are obtained. It comes into contact with a part of the outer periphery.

  Further, when the substrate 10 and the light guide 30 further approach each other, a part of the inclined surface 46a and a part of the outer periphery of the upper surface of the substrate 10 are rubbed together, and a circular radial direction formed by the substrate 10 is at the contact point. An action force and a reaction force are generated. Further, as described above, the substrate 10 has a strength that does not deform, and the fixing portion 44 is made of resin and is a flat column. Therefore, the acting force acts on the distal end portion of the fixing portion 44, thereby fixing the fixing portion. The tip of 44 is pushed toward the outer side in the circular radial direction formed by the substrate 10. Therefore, the fixing portion 44 is elastically deformed and bends toward the outer side of the circle.

  Further, when the substrate 10 and the light guide 30 further approach each other, the substrate 10 and the light guide 30 are arranged as shown in FIG. 4, and the fixing portion 44 returns from elastic deformation. Therefore, a part of the inner side surface of the lower part of the fixing portion 44 and a part of the side surface of the substrate 10 are brought into contact with each other. Further, since a part of the upper surface protruding inward in the radial direction of the protrusion 46 and a part of the outer periphery of the lower surface of the corresponding substrate 10 are in contact with each other, the circular shape formed by the substrate 10 and the light guide The cylindrical shape formed by 30 is aligned so that the centers overlap. Moreover, since the board | substrate 10 and the light guide 30 are hold | suppressed by the protrusion part 46, it cannot leave | separate more than a fixed distance.

  Further, in the illumination device 1, a plurality of columnar portions 42 provided so as to protrude downward from the light guide 30 from a part of the cylindrical lower surface formed by the light guide 30, the lower surface of the columnar portion 42 is used as the upper surface of the substrate 10. The light guide 30 is held in a state where it is separated by a certain distance.

  Further, as described above, the length of the fixing portion 44 is obtained by adding the distance from a part of the lower surface of the light guide 30 provided in contact with the fixing portion 44 to the substrate 10 and the thickness of the substrate 10. Since the length is formed, the substrate 10 and the light guide 30 are held at a fixed distance and fixed.

  In addition, two each of the first light emitting element 21 and the second light emitting element 22 are arranged, but they are arranged at symmetrical positions with respect to the cylindrical center formed by the light guide 30. In addition, since the columnar portion 42 is provided at a position where the distances are equal to each other from the two first light emitting elements 21, the light guided inside the light guide 30 is reflected on the upper surface of the columnar portion 42. The light leakage from the contact point with the light guide 30 is symmetric with respect to the cylindrical shape formed by the light guide 30. As a result, the light guided while being irregularly reflected inside the light guide 30 is symmetric with respect to the center of the cylindrical shape formed by the light guide 30, so that the appearance of the illumination device 1 during light emission is impaired. There is nothing. Moreover, the columnar part 42 is arrange | positioned in the uppermost part of the step which the reflection part 33 makes among the lower surfaces of the light guide 30, as shown in FIG. In addition, the light that enters and is guided from the first light emitting element 21 and the second light emitting element 22 to the inside of the light guide 30 reaches most of the staircase formed by the reflecting portion 33, and is mostly Light is already emitted from the upper surface of the light guide and the remaining light amount is reduced. Therefore, since the amount of light entering the upper surface of the columnar portion 42 is small, the appearance of the illumination device 1 at the time of light emission is not impaired.

  As described above, the illumination device 1 according to the above embodiment includes the substrate 10, the light emitting element placed on the substrate 10, and the cylindrical light guide made of the translucent material disposed above the substrate 10 and the light emitting element. 30. In addition, the light guide 30 includes a V-shaped notch 36 that is a reflective surface formed in a part of the upper portion of the light guide 30. Further, a light incident part 35 that protrudes downward from the lower portion of the light guide 30 below the notch 36 toward the light emitting element and is opposed to the upper surface of the light emitting element, and light incident from the light incident part 35. And a concave portion 32 having a refracting portion for changing the direction of the light. Further, the light guide unit 31 includes a cylindrical light guide unit 31 that propagates light, and a reflection unit 33 provided on the entire lower surface of the light guide unit 31. In addition, the light emitting element includes a first light emitting element 21 made of a light source of a first color and a second light emitting element 22 made of a light source of a second color arranged immediately below the light incident portion 35. . The first light emitting element 21 is arranged radially outside the second light emitting element 22 with respect to the cylindrical center formed by the light guide 30 and arranged side by side along the radial direction with the second light emitting element 22. ing. In addition, the recess 32 is formed thicker in the radial direction than the light guide portion 31, and the second light emitting element 22 is arranged to be shifted from the light guide portion 31 in the radial direction. The concave portion 32 includes a first refractive portion 37 that refracts light emitted from the second light emitting element 22 outward in the radial direction, and a second refractive portion that guides light refracted by the first refractive portion 37 to the light guide portion 31. 38. The first light emitting element 21 emits light to the light guide unit 31 without passing through the first refracting unit 37 and the second refracting unit 38. Therefore, even if two light emitting elements are arranged along the cylindrical radial direction formed by the light guide 30, the first light refraction part 37 and the second refraction part 38 are provided in the light incident part, so that the light guide part 31 is provided. Light can be refracted and incident. For this reason, since the light guide 30 and the illuminating device 1 can be kept small only by increasing the thickness of the concave portion 32, light of two colors can be reliably guided to the cylindrical light guide. Does not occur.

  In addition, two or more sets of light emitting elements including the first light emitting element 21 and the second light emitting element 22 are provided, and the notch 36, the light incident part 35, the first refraction part 37, and the second refraction part 38 include A plurality of light emitting elements are provided corresponding to the number of sets of light emitting elements. Moreover, the light guide 30 is equally divided according to the number of sets of light emitting elements. This increases the number of points where light enters the light guide 30, thereby reducing the unevenness of the light emitted from the light guide 30 and facilitating recognition of the appearance of the illumination device 1 during light emission. And the designability is improved.

  In addition, a part of the lower surface of the light guide 30 has a plurality of columnar portions 42 of the same length and made of the same material as the light guide 30, and the plurality of columnar portions 42 are formed on the substrate. 10, the distance between the substrate 10 and the light guide 30 in the vertical direction is constant. In addition, since the distance between the upper surface of the light emitting element and the light guide 30 becomes constant and the optical path of light incident on the light guide 30 is stabilized, the light emitted from the light guide 30 is stabilized. This improves the ease of recognizing the appearance of the illumination device 1 during light emission and the design.

  Further, the columnar part 42 is provided at a position where the distances from the plurality of first light emitting elements 21 are equal. As a result, unevenness in light output from the upper surface of the light guide 30 caused by leakage of part of the light from the joint surface between the light guide 30 and the columnar portion 42 is a cylindrical circle formed by the light guide 30. It is symmetric with respect to the center. Therefore, since the light emission from the illumination device becomes regular, the ease of recognizing the appearance of the illumination device 1 during the light emission and the design are improved.

  The substrate 10 is formed in a circular shape that is substantially the same shape as the outer periphery of the light guide 30. A plurality of fixing portions 44 extending downward are formed on the outer surface of the light guide 30. Further, the length of the fixed portion 44 from the lower surface of the light guide 30 is the distance from the lower surface of the light guide 30 provided in contact with the fixed portion 44 to the upper surface of the substrate 10, the thickness of the substrate 10, And a protruding portion 46 that partially protrudes radially inward at the tip. Moreover, since the protrusion part 46 engages with the lower surface of the board | substrate 10, the position of the board | substrate 10 and the light guide 30 can be fixed to the distance abutted by the columnar part 42. FIG. This stabilizes the optical path of the light incident on the light guide 30 and stabilizes the light emitted from the light guide 30, so that the appearance of the illumination device 1 can be easily recognized and designed at the time of light emission. Will improve.

  In addition, this invention is not limited to the said embodiment, For example, it can deform | transform and implement as follows, These embodiments also belong to the technical scope of this invention.

  In the above embodiment, the columnar portion 42 is formed integrally with the light guide 30, but these may be formed separately. According to this, since the contact point between the columnar part 42 and the light guide 30 is a mirror surface unless optically joined, the amount of light leaking from the contact point is reduced. Therefore, since the illumination device 1 emits light more efficiently, the appearance of the illumination device 1 is improved.

  In the said embodiment, although the fixing | fixed part 44 was shape | molded integrally with the light guide 30, these may be shape | molded separately. According to this, since the contact between the fixing portion 44 and the light guide 30 is a mirror surface unless optically joined, the amount of light leaking from the contact is reduced. Therefore, since the illumination device 1 emits light more efficiently, the appearance of the illumination device 1 is improved.

  In the above embodiment, two sets of light emitting elements are provided, but two or more sets of light emitting elements may be provided. According to this, since the number of places where light enters the light guide 30 increases, the illumination device 1 emits light more uniformly.

  In the above embodiment, the reflection portion 33 has been serrated, but these may have a reflective shape other than serration, such as a textured process. When the reflecting portion 33 is textured, the unevenness of the reflecting surface of the reflecting portion 33 is smaller than that of the serration processing, so that the illumination device 1 emits light more uniformly.

  In the above embodiment, the substrate 10 has a circular shape. However, the substrate 10 only needs to be shaped so that the fixing portion 44 can be fixed. In other words, the substrate 10 may have a rectangular shape, and an insertion hole through which the fixing portion 44 is inserted and fixed may be formed at a location where the fixing portion 44 is fixed.

  In addition, the present invention can be implemented with various modifications without departing from the scope of the invention.

DESCRIPTION OF SYMBOLS 1 Illuminating device 10 Board | substrate 21 1st light emitting element 22 2nd light emitting element 30 Light guide 31 Light guide part 32 Concave part 33 Reflection part 34 Light emission part 35 Light incident part 36 Notch 36a V-shaped bottom 37 1st refraction part 38 1st 2 Refraction part 42 Columnar part 44 Fixed part 46 Projection part 46a Slope 101 Switch

Claims (5)

A substrate, a light emitting element placed on the substrate, and a cylindrical light guide made of a translucent material disposed above the substrate and the light emitting element, A V-shaped notch that is a reflection surface formed in a part of the upper part of the light guide, and projects downward from the lower part of the light guide below the notch toward the light emitting element. A light incident portion formed to face the upper surface of the light emitting element; a concave portion having a refracting portion that changes the direction of light incident from the light incident portion; a cylindrical light guide portion that propagates light; and the light guide. An illuminating device comprising: a reflecting portion provided on the entire lower surface of the light portion;
The light emitting element includes a first light emitting element made of a light source of a first color and a second light emitting element made of a light source of a second color arranged immediately below the light incident portion, and the first light emission. The element is arranged radially outside the second light emitting element with respect to the center of the cylindrical shape formed by the light guide, and arranged side by side along the radial direction with the second light emitting element. The second light emitting element is formed to be thicker on the inner side in the radial direction than the light guide part, the second light emitting element is arranged to be shifted inward in the radial direction from the light guide part, and the concave part has a radius to emit light emitted from the second light emitting element. A first refracting part that refracts outward in the direction, and a second refracting part that guides light refracted by the first refracting part to the light guide part, wherein the first light emitting element includes the first refracting part and An illuminating device that emits light to the light guide part without passing through a second refracting part.   Two or more sets of the light emitting elements including the first light emitting element and the second light emitting element are provided, and the notch, the light incident part, the first refractive part, and the second refractive part are 2. The light emitting device according to claim 1, wherein a plurality of light emitting elements are provided corresponding to the number of sets of light emitting elements, and the light guides are equally divided according to the number of sets of light emitting elements. Illumination device.   A part of the lower surface of the light guide has a plurality of columnar parts made of the same material as the light guide and integrally formed, and the plurality of columnar parts are in contact with and supported by the upper surface of the substrate. The illumination device according to claim 2, wherein   The illumination device according to claim 3, wherein the columnar portion is provided at a position where the distances from the plurality of first light emitting elements are equal. The substrate is formed in a circular shape substantially the same shape as the outer periphery of the light guide, and a plurality of fixing portions extending downward are formed on the outer surface of the light guide, The length from the lower surface of the light guide is the sum of the distance from the lower surface of a part of the light guide provided in contact with the fixed portion to the upper surface of the substrate, and the thickness of the substrate. 5. The device according to claim 3, wherein the protrusion has a protruding portion that protrudes radially inward at the tip, and the protruding portion engages with a lower surface of the substrate. The illumination device according to 1.