JP2019185993A - Light source unit and illuminating device - Google Patents

Abstract

An object of the present invention is to provide a light source unit that improves the appearance at the time of lighting while securing the rigidity of the light source unit, and a lighting device using the light source unit. The light source unit includes a light source that emits light, a substrate on which the light source is mounted, a frame on which the substrate is mounted, and a light source unit that is provided outside the light source and reflects light emitted from the light source in the emission direction of the light source. A first reflecting surface; and a second reflecting surface that reflects the light reflected by the first reflecting surface in a direction opposite to the direction in which the light source emits light. [Selection diagram] FIG.

Description

  The present invention relates to a light source unit including a light source that emits light and an illumination device using the light source unit.

  2. Description of the Related Art Conventionally, an illumination device using a light emitting element such as an LED (Light Emitting Diode) as a light source is known. The lighting device includes a light source unit including a substrate on which a light emitting element is mounted and a power source, and a fixture main body to which the light source unit is detachably attached. Patent Document 1 discloses a lighting fixture in which a long substrate on which a plurality of light emitting elements are arranged is attached to a frame, and a cover member is provided so as to cover the frame and the substrate. In Patent Literature 1, both ends of the frame are bent in order to ensure the rigidity of the light source unit, and the bending direction of the frame is opposite to the light emitting direction of the light source.

Japanese Patent No. 5652015

  However, the lighting fixture disclosed in Patent Document 1 has a light source unit that is thick because both ends of the frame are bent in a direction opposite to the light emitting direction. In addition, if the thickness of the light source unit is to be suppressed, the frame is bent in the emission direction of the light source in order to ensure the rigidity of the light source unit, thereby blocking the light emitted from the light emitting element. Thereby, a dark part arises in a part of frame, and the appearance at the time of lighting deteriorates.

  The present invention has been made against the background of the above problems, and provides a light source unit that improves the appearance during lighting while securing the rigidity of the light source unit, and a lighting device using the light source unit. .

  A light source unit according to the present invention is provided on the outside of a light source that emits light, a substrate on which the light source is mounted, a frame to which the substrate is attached, and reflects light emitted from the light source in the emission direction of the light source. A first reflecting surface; and a second reflecting surface that reflects light reflected by the first reflecting surface in a direction opposite to the emitting direction of the light source.

  According to the present invention, the first reflection surface reflects the light emitted from the light source in the emission direction of the light source, and the second reflection surface reflects the light reflected by the first reflection surface in the anti-emission direction of the light source. To reflect. For this reason, even if the frame is bent in the emission direction of the light source, the light emitted from the light source proceeds in the opposite emission direction without being blocked by the frame. For this reason, the uniformity at the time of lighting can be ensured. Therefore, the appearance at the time of lighting can be improved while securing the rigidity of the light source unit.

It is a disassembled perspective view which shows the light source unit 1 which concerns on Embodiment 1 of this invention. It is a side view which shows the light source unit 1 which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the light source unit 1 which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the advancing direction of light in the light source unit 1 which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the light source unit 100 which concerns on Embodiment 2 of this invention. It is sectional drawing which shows the advancing direction of light in the light source unit 100 which concerns on Embodiment 2 of this invention. It is a disassembled perspective view which shows the light source unit 200 which concerns on Embodiment 3 of this invention. It is sectional drawing which shows the light source unit 200 which concerns on Embodiment 3 of this invention. It is sectional drawing which shows the advancing direction of light in the light source unit 200 which concerns on Embodiment 3 of this invention. It is a perspective view which shows the illuminating device 2 which concerns on Embodiment 4 of this invention.

Embodiment 1 FIG.
Hereinafter, embodiments of a light source unit and an illumination device according to the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view showing a light source unit 1 according to Embodiment 1 of the present invention, and FIG. 2 is a side view showing the light source unit 1 according to Embodiment 1 of the present invention. As shown in FIGS. 1 and 2, the light source unit 1 includes a light source 10, a substrate 3, a frame 4, a cover 5, and a cover side plate 6.

  The light source 10 is a light emitting element that emits light, and emits white light, for example, and includes a structure in which a phosphor is coated on an LED chip. The light source 10 is provided with a phosphor that converts the wavelength of blue light into yellow light on an LED chip that emits blue light of, for example, about 440 nm to 480 nm. Thus, the light source 10 is a light emitting element that emits white light as combined light. The light source 10 may be a COB type light emitting module, an organic EL element, an LD (Laser Diode), or the like, or a light emitting element having a large area of one light emitting surface.

  The substrate 3 is, for example, a rectangular and plate-like glass epoxy substrate, and the light source 10 is mounted along the longitudinal direction. In addition, the board | substrate 3 may improve heat dissipation performance as metal boards, such as aluminum or iron. The rows of the light sources 10 mounted on the substrate 3 may be one row or a plurality of rows. For example, a white resist is applied to the surface of the substrate 3, thereby improving the light reflectance. In addition to the light source 10, circuit elements (not shown) such as diodes, terminals (not shown) such as connectors, wirings (not shown), and the like are appropriately mounted on the substrate 3.

  The frame 4 is to which the substrate 3 is attached, and is held by adhesion, for example. The frame 4 is made of, for example, a sheet metal painted in white, thereby improving the light reflectivity. Further, the frame 4 has a function as a heat sink that dissipates heat generated from the light source 10. The frame 4 includes a bottom portion 40 to which the substrate 3 is attached and a side portion 41 that is provided outside the bottom portion 40 and protrudes in the emission direction of the light source 10.

  FIG. 3 is a cross-sectional view showing light source unit 1 according to Embodiment 1 of the present invention, and is a cross-sectional view taken along the line AA of FIG. 3 indicates the optical axis 11 of the light source 10, and light is emitted from the light source 10 in the positive y-axis direction. Note that the optical axis 11 of the light source 10 is completely or substantially coincides with the central axis of the light source unit 1. As shown in FIG. 3, the frame 4 has a line-symmetric shape about the optical axis 11 of the light source 10. The bottom 40 has a long and rectangular plate shape extending in the longitudinal direction. The side portion 41 extends from both ends of the bottom portion 40 and has an arc shape so as to protrude in the emission direction of the light source 10 (y-axis positive direction).

  The cover 5 covers the light source 10 in the emission direction of the light source 10 and is made of an optical material such as acrylic resin, polycarbonate resin, or glass. When the cover 5 is made of a resin, a milky white resin having a diffusibility mixed with a milky white diffusing material, a white resin having a high reflectance, or a transparent resin having a high light transmittance is used. The cover 5 includes a holding portion 5a held by the frame 4 on the light source 10 side, and an emission portion 5b through which light emitted from the light source 10 passes through a hollow portion formed between the holding portion 5a.

  As shown in FIG. 3, the cover 5 has a line-symmetric shape with the optical axis 11 as the center. The holding portion 5 a is a pair of members that are symmetrical with respect to the optical axis 11, and the holding surface 54 formed on the holding portion 5 a has a similar shape along the side portion 41 of the frame 4. The cover 5 and the frame 4 are fixed by engaging with. The emission part 5 b is connected to the ends of the pair of holding parts 5 a and has an emission side surface 51 and an emission top surface 50. The emission side surface 51 is a member extending in the emission direction (y-axis positive direction) of the light source 10 from the end of the holding portion 5a. The emission top surface 50 is located on the most irradiation surface side of the cover 5 and has a curved surface shape protruding in the emission direction of the light source 10 (y-axis positive direction). The cover side plate 6 is bonded to both end surfaces of the cover 5 in the longitudinal direction. Here, a first reflection surface 52 is formed on the holding portion 5a, and a second reflection surface 53 is formed on the emission top surface 50 of the emission portion 5b.

  The first reflecting surface 52 extends from the holding surface 54 of the holding unit 5a toward the light source 10 and is a curved surface that extends away from the optical axis 11 of the light source 10 and extends in the opposite emission direction as the distance from the light source 10 increases. The second reflecting surface 53 extends from the emission top surface 50 toward the light source 10 and is a plane that is separated from the optical axis 11 of the light source 10 as it is separated from the light source 10. In the first embodiment, a white material having a high reflectance is used for the surface including the first reflecting surface 52, the second reflecting surface 53, and the holding surface 54, and the surface including the emitting top surface 50 and the emitting side surface 51. A milky white material having a diffusibility is used. It should be noted that a coating such as a metal film may be applied to surfaces that require higher reflectivity or lower diffusibility, such as the first reflecting surface 52 and the second reflecting surface 53.

  FIG. 4 is a cross-sectional view showing the traveling direction of light in light source unit 1 according to Embodiment 1 of the present invention. Next, the light path in the light source unit 1 will be described. The light path in FIG. 4 is a path of light emitted from the center of the optical axis 11 of the light source 10. Note that light lines A1, B1, C1, and D1 emitted in different directions from the reference line with a line perpendicular to the optical axis 11 (the positive x-axis direction) as a reference line, that is, a line with an angle of 0 °. Will be described. Here, in order from the lowest angle from the reference line, the light is a small angle light A1, a medium angle light B1, a medium angle light C1, and a large angle light D1. The direction of the optical axis 11 (y-axis positive direction) is 90 ° from the reference line.

  First, the path of the small-angle light A1 having the smallest angle from the reference line will be described. As shown in FIG. 4, the small-angle light A <b> 1 travels from the light source 10 toward the first reflecting surface 52, is totally reflected by the first reflecting surface 52, and travels toward the second reflecting surface 53. The small-angle light A1 that has reached the second reflecting surface 53 is totally reflected by the second reflecting surface 53, and travels in the counter-emission direction (y-axis negative direction) opposite to the emission direction of the light source 10, and the cover 5 The light is emitted from the emission side 51 to the outside of the cover 5.

  Next, the path of the medium angle light B1 whose angle from the reference line is the first half of the medium angle will be described. As shown in FIG. 4, the medium-angle light B <b> 1 travels from the light source 10 toward the exit ceiling 50, refracts at the exit ceiling 50, and exits from the cover 5. The path of the medium angle light C1 whose angle from the reference line is the latter half of the medium angle will be described. As shown in FIG. 4, the medium angle light C <b> 1 is emitted from the light source 10 toward the second reflection surface 53 without going through the first reflection surface 52, and is emitted from the output top surface 50 to the outside of the cover 5. Finally, the path of the large-angle light D1 having the largest angle from the reference line will be described. As shown in FIG. 4, the large-angle light D <b> 1 travels from the light source 10 toward the exit ceiling 50, refracts at the exit ceiling 50, and exits from the cover 5.

  According to the first embodiment, the first reflection surface 52 reflects the light emitted from the light source 10 in the emission direction of the light source 10, and the second reflection surface 53 is reflected by the first reflection surface 52. The reflected light is reflected in the opposite direction of the light source 10. For this reason, even if the frame 4 is bent in the emission direction of the light source 10, the light emitted from the light source 10 proceeds in the opposite emission direction without being blocked by the frame 4. For this reason, the uniformity at the time of lighting can be ensured. Therefore, the appearance at the time of lighting can be improved while ensuring the rigidity of the light source unit 1.

  In the first embodiment, the side portion 41 of the frame 4 protrudes in the emission direction of the light source 10 (y-axis positive direction). Accordingly, the thickness of the light source unit 1 in the y-axis direction can be increased while ensuring the rigidity of the light source unit 1 as compared with the case where the side portion 41 of the frame 4 protrudes in the opposite emission direction (y-axis negative direction) of the light source 10. Can be suppressed. Further, in the first embodiment, the light reflected by the side portion 41 is guided to the emission side surface 51 of the cover 5 by forming the first reflective surface 52 and the second reflective surface 53 on the cover 5. be able to.

  If the first reflecting surface 52 and the second reflecting surface 53 are not present, the light traveling from the light source 10 toward the side portion 41 of the frame 4 is prevented from traveling by the side portion 41, and the light exiting side 51 of the cover 5 It does not reach the range L (see FIG. 3), and a dark part is formed in the cover 5. The blocked light is light above the broken line in FIG. On the other hand, in the first embodiment, the first reflection surface 52 and the second reflection surface 53 are formed so that the light blocked by the side portion 41 is guided to the emission side surface 51 of the cover 5. Can do. Thereby, the light reaches the range L, and the dark part is eliminated. Accordingly, the entire cover 5 shines uniformly.

  As described above, in the first embodiment, the side portion 41 of the cover 5 protrudes in the emission direction of the light source 10, thereby suppressing the thickness of the light source unit 1 while ensuring the rigidity of the light source unit 1. In addition, since the first reflecting surface 52 and the second reflecting surface 53 are formed on the cover 5, uneven brightness of the cover 5 can be eliminated. That is, the rigidity of the light source unit 1 and the appearance at the time of lighting can be made compatible while suppressing the thickness of the light source unit 1. Accordingly, it is possible to easily realize the lighting device 2 with high appearance quality.

Embodiment 2. FIG.
FIG. 5 is a cross-sectional view showing light source unit 100 according to Embodiment 2 of the present invention. In the second embodiment, the positions of the first reflecting surface 152 and the second reflecting surface 153 are different from those in the first embodiment. In the second embodiment, portions common to the first embodiment are denoted by the same reference numerals, description thereof is omitted, and differences from the first embodiment will be mainly described.

  As shown in FIG. 5, the cover 15 has a line-symmetric shape with the optical axis 11 as the center. Both the first reflecting surface 152 and the second reflecting surface 153 are formed on the holding portion 5a. The holding portion 5a is formed with a reflecting portion 155, and the reflecting portion 155 has a first reflecting surface 152, a second reflecting surface 153, a light incident surface 156, and an intermediate surface 157, Each is a continuous surface. The first reflecting surface 152 is connected to the light source 10 side of the holding unit 5a. The first reflecting surface 152 is a paraboloid having a focal point on the y-axis and protruding in the negative y-axis direction. The second reflecting surface 153 is a continuous surface with the first reflecting surface 152, and the light source becomes closer to the optical axis 11 starting from a point A farthest from the optical axis 11 of the first reflecting surface 152. 10 has a shape having an inclination in a direction approaching 10 (a negative y-axis direction).

  The light incident surface 156 is formed on the emission side of the light source 10 and captures light emitted from the light source 10. The light incident surface 156 is a part of a sphere, for example, the center is the center of the light emitting surface of the light source 10. The point B farthest from the light source 10 on the light incident surface 156 protrudes on the line segment connecting the light source 10 and the edge of the side portion 41 or on the emission direction (y-axis positive direction) of the light source 10 from the line segment. ing. The intermediate surface 157 is a surface that connects the light incident surface 156 and the second reflecting surface 153. The intermediate surface 157 is inclined so as not to obstruct the optical paths of the light incident from the light incident surface 156 and the light reflected by the first reflecting surface 152, and has a linear shape, for example. In the second embodiment, for example, a transparent material is used for the reflecting portion 155 having the first reflecting surface 152 and the second reflecting surface 153, and the surface including the emitting top surface 50 and the emitting side surface 51 has diffusibility. Milk white material is used.

  FIG. 6 is a cross-sectional view showing the traveling direction of light in light source unit 100 according to Embodiment 2 of the present invention. Next, the light path in the light source unit 100 will be described. The light path in FIG. 6 is a path of light emitted from the center of the optical axis 11 of the light source 10. The light A2, B2 and D2 emitted from the reference line in different directions will be described with the line in the direction perpendicular to the optical axis 11 (the positive x-axis direction) being the reference line, that is, the line having an angle of 0 °. To do. Here, in order from the lowest angle from the reference line, the light is a small angle light A2, a medium angle light B2, and a large angle light D2. The direction of the optical axis 11 (y-axis positive direction) is 90 ° from the reference line.

  First, the path of the small-angle light A2 having the smallest angle from the reference line will be described. As shown in FIG. 6, the small angle light A <b> 2 is emitted from the light source 10, enters the light incident surface 156, and enters the reflecting portion 155 from the light incident surface 156. Since the light incident surface 156 is a part of a sphere centered on the light source 10, the light is not refracted on the light incident surface 156. Light incident from the light incident surface 156 travels toward the first reflective surface 152, is totally reflected by the first reflective surface 152, and travels toward the second reflective surface 153. The small-angle light A2 that has reached the second reflecting surface 153 is totally reflected by the second reflecting surface 153, and travels in the counter-emission direction (y-axis negative direction) opposite to the emission direction of the light source 10, and the cover 15 The light is emitted from the emission side surface 51 to the outside of the cover 15.

  Next, a description will be given of the path of the medium-angle light B2 having an intermediate angle from the reference line. As shown in FIG. 6, the medium-angle light B <b> 2 travels toward the intermediate surface 157, is reflected by the intermediate surface 157, and travels toward the exit top surface 50. The medium angle light B <b> 2 is refracted at the emission top surface 50 and is emitted out of the cover 15. Finally, the path of the large-angle light D2 having the largest angle from the reference line will be described. As shown in FIG. 6, the large-angle light D <b> 2 travels from the light source 10 toward the exit ceiling 50, refracts at the exit ceiling 50, and exits from the cover 15.

  According to the second embodiment, it is possible to control the light to be guided by the emission side surface 51 by providing the reflection portion 155 using transparent resin in a part of the cover 15. Thereby, the uneven brightness of the entire cover 15 can be eliminated. As described above, the second embodiment is similar to the first embodiment in that the side portion 41 of the cover 15 protrudes in the emission direction of the light source 10, thereby ensuring the rigidity of the light source unit 100. The thickness is suppressed. In addition, since the first reflecting surface 152 and the second reflecting surface 153 are formed on the cover 15, uneven brightness of the cover 15 can be eliminated. That is, the rigidity of the light source unit 100 and the appearance at the time of lighting can be compatible while suppressing the thickness of the light source unit 100. Accordingly, it is possible to easily realize the lighting device 2 with high appearance quality.

Embodiment 3 FIG.
FIG. 7 is an exploded perspective view showing the light source unit 200 according to Embodiment 3 of the present invention. The third embodiment is different from the first embodiment in that the light source unit 200 includes the optical element 7. In the third embodiment, portions common to the first embodiment are denoted by the same reference numerals, description thereof is omitted, and differences from the first embodiment will be mainly described.

  As shown in FIG. 7, the optical element 7 is provided so as to cover the frame 4, and a transparent material is used.

  FIG. 8 is a cross-sectional view showing light source unit 200 according to Embodiment 3 of the present invention. As shown in FIG. 8, the cover 25 and the optical element 7 have a line-symmetric shape about the optical axis 11. The cover 25 is not formed with the first reflection surface 72 and the second reflection surface 73, and is composed of the emission top surface 50, the emission side surface 51, and the holding surface 254. The emission top surface 50 and the emission side surface 51 are the same as those in the first embodiment. The holding surface 254 extends from the emission side surface 51 toward the optical axis 11, and a part of the holding surface 254 is similar to the side portion 41 so as to cover the side portion 41 of the frame 4.

  The optical element 7 has a light incident top surface 71, a light incident side surface 70, a first reflection surface 72, a second reflection surface 73, and an emission surface 74. The incident light top surface 71 is disposed at a position facing the light source 10 and is a plane parallel to the x-axis. The light incident side surface 70 is connected to both ends of the light incident top surface 71 and extends in a direction approaching the optical axis 11 as it goes in the emission direction (y-axis positive direction) of the light source 10. The first reflecting surface 72 is connected to the outer end of the light incident side surface 70, extends in a direction away from the optical axis 11 toward the emission direction (y-axis positive direction) of the light source 10, and protrudes in the y-axis negative direction. .

  The second reflecting surface 73 is a continuous surface connected to the outer end portion of the first reflecting surface 72, and starting from a point C farthest from the optical axis 11 in the first reflecting surface 72, As it approaches the optical axis 11, it has a shape that is inclined in the direction approaching the light source 10 (the negative y-axis direction). The emission surface 74 is a surface that connects the two second reflection surfaces 73 and is a plane parallel to the x-axis. In the third embodiment, a milky white material having diffusibility is used for the emission top surface 50 and the emission side surface 51, and a white material having a high reflectance is used for the holding surface 254.

  FIG. 9 is a cross-sectional view showing the traveling direction of light in light source unit 200 according to Embodiment 3 of the present invention. Next, the light path in the light source unit 200 will be described. The light path in FIG. 9 is a path of light emitted from the center of the optical axis 11 of the light source 10. The light A3 and D3 emitted in different directions from the reference line will be described using a line perpendicular to the optical axis 11 (the positive x-axis direction) as a reference line, that is, a line with an angle of 0 °. Here, the small angle light A3 and the large angle light D3 are set in ascending order of the angle from the reference line. The direction of the optical axis 11 (y-axis positive direction) is 90 ° from the reference line.

  First, the path of the small angle light A3 having the smallest angle from the reference line will be described. As shown in FIG. 9, the small-angle light A <b> 3 exits from the light source 10 and enters the light incident side surface 70, and enters the optical element 7 from the light incident side surface 70. The light incident from the light incident side surface 70 is refracted by the light incident side surface 70, travels toward the first reflective surface 72, is totally reflected by the first reflective surface 72, and travels toward the second reflective surface 73. The small-angle light A3 that has reached the second reflecting surface 73 is totally reflected by the second reflecting surface 73, and travels in a counter-emission direction (y-axis negative direction) opposite to the emission direction of the light source 10, and covers 25. The light is emitted from the emission side 51 to the outside of the cover 25.

  Next, the path of the large-angle light D3 having the largest angle from the reference line will be described. As shown in FIG. 9, the large-angle light D <b> 3 exits from the light source 10, enters the incident light top surface 71, and enters the optical element 7 from the incident light top surface 71. The light incident from the incident ceiling 71 is refracted by the incident ceiling 71 and directed to the exit surface 74, and refracted by the exit surface 74 and directed to the exit ceiling 50 of the cover 25. The light refracted by the emission top surface 50 of the cover 25 is emitted outside the cover 25.

  According to the third embodiment, by adding the optical element 7 having the first reflection surface 72 and the second reflection surface 73, it is possible to control the light to be guided by the emission side surface 51. Thereby, the uneven brightness of the entire cover 25 can be eliminated. As described above, in the third embodiment, similarly to the first embodiment, the side portion 41 of the cover 25 projects in the emission direction of the light source 10, thereby ensuring the rigidity of the light source unit 200. The thickness is suppressed. In addition, by providing the optical element 7 on which the first reflecting surface 72 and the second reflecting surface 73 are formed, the uneven brightness of the cover 25 can be eliminated. That is, it is possible to achieve both the rigidity of the light source unit 200 and the appearance at the time of lighting while suppressing the thickness of the light source unit 200. Accordingly, it is possible to easily realize the lighting device 2 with high appearance quality.

Embodiment 4 FIG.
FIG. 10 is a perspective view showing an illuminating device 2 according to Embodiment 4 of the present invention. The fourth embodiment is an illumination device 2 in which the light source unit 1 according to the first embodiment is applied to a downlight. As shown in FIG. 10, the lighting device 2 includes a fixture body 8 and a light source unit 1. The instrument body 8 is attached to an attachment portion (not shown) such as a ceiling by a fixture such as a suspension bolt (not shown), and has an inverted Fuji shape. The instrument main body 8 includes a mounting portion 80, a side plate 81, a terminal block 12, and a spring 13. The attachment portion 80 is a member to which a part of the light source unit 1 is inserted and attached. The side plate 81 is a plate-like member that covers both ends of the attachment portion 80 in the longitudinal direction. The terminal block 12 is inserted with a power line (not shown) drawn from the outside of the instrument body 8. The spring 13 is caught by the light source unit 1 and held.

  Since the illuminating device 2 according to the fourth embodiment includes the light source unit 1 according to the first embodiment, the cover 5 has no uneven brightness and can ensure uniformity during lighting. Accordingly, it is possible to easily realize the lighting device 2 with high appearance quality. Further, the side portion 41 of the frame 4 protrudes in the emission direction of the light source 10 (y-axis positive direction). Accordingly, the thickness of the light source unit 1 in the y-axis direction can be increased while ensuring the rigidity of the light source unit 1 as compared with the case where the side portion 41 of the frame 4 protrudes in the opposite emission direction (y-axis negative direction) of the light source 10. Can be suppressed. Therefore, the depth of the attachment part 80 of the instrument main body 8 can be made shallow. Therefore, a more compact lighting device 2 can be realized.

  In addition, the illuminating device 2 may have the light source units 100 and 200 which concern on Embodiment 2 or Embodiment 3. Further, in the fourth embodiment, the case of the lighting device 2 having the fixture body 8 having an inverted Fuji shape is illustrated, but the lighting device 2 having the embedded shape fixture body 8 may be used, and the trough shape may be used. The illuminating device 2 which has the instrument main body 8 may be sufficient.

  DESCRIPTION OF SYMBOLS 1 Light source unit, 2 Illumination device, 3 Substrate, 4 Frame, 5 Cover, 5a Holding part, 5b Output part, 6 Cover side plate, 7 Optical element, 8 Instrument body, 10 Light source, 11 Optical axis, 12 Terminal block, 13 Spring , 15 cover, 25 cover, 40 bottom part, 41 side part, 50 outgoing top face, 51 outgoing side face, 52 first reflecting face, 53 second reflecting face, 54 holding face, 70 incoming side face, 71 incoming ceiling Surface, 72 first reflecting surface, 73 second reflecting surface, 74 emitting surface, 80 mounting portion, 81 side plate, 100 light source unit, 152 first reflecting surface, 153 second reflecting surface, 155 reflecting portion, 156 Light incident surface, 157 intermediate surface, 200 light source unit, 254 holding surface.

Claims (11)

A light source that emits light;
A substrate on which the light source is mounted;
A frame to which the substrate is attached;
A first reflection surface provided outside the light source and reflecting light emitted from the light source in an emission direction of the light source;
A second reflection surface that reflects light reflected by the first reflection surface in a direction opposite to the emission direction of the light source;
A light source unit comprising: The frame is
A bottom to which the substrate is attached;
The light source unit according to claim 1, further comprising: a side portion that is provided outside the bottom portion and protrudes in an emission direction of the light source. The light source unit according to claim 1, further comprising a light incident surface that is formed on an emission side of the light source and takes in light emitted from the light source. The light incident surface is
4. The light source unit according to claim 3, wherein the light source unit is dependent on a line segment connecting the light source and an edge of the side part or protrudes in an emission direction of the light source from the line segment. The first reflecting surface is
The light source unit according to any one of claims 1 to 4, wherein the light source unit extends in a counter-emission direction while being away from the optical axis of the light source as the distance from the light source is increased. The second reflecting surface is
The light source unit according to claim 1, wherein the light source unit is formed so as to be separated from an optical axis of the light source as the distance from the light source is increased. The first reflecting surface and the second reflecting surface are:
The light source unit according to claim 1, wherein the light source unit is formed on a cover that covers the light source. The cover is
A holding portion held by the frame on the light source side;
A hollow part is formed between the holding part and an emission part through which light emitted from the light source passes,
The first reflecting surface is formed on the holding portion,
The light source unit according to claim 7, wherein the second reflecting surface is formed on the emitting portion. The cover is
A holding portion held by the frame on the light source side;
A hollow part is formed between the holding part and an emission part through which light emitted from the light source passes,
The light source unit according to claim 7, wherein the first reflection surface and the second reflection surface are formed on the holding portion. The first reflecting surface and the second reflecting surface are:
The light source unit according to claim 1, wherein the light source unit is formed on an optical element provided to cover the frame. An illumination device comprising the light source unit according to any one of claims 1 to 10.

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