JP2017069111A - Light source unit and lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source unit and a lighting fixture capable of improving lighting efficiency while suppressing a user from feeling a sense of strangeness during lighting.SOLUTION: A light source unit 3 comprises: an elongated substrate 51; a plurality of light sources (LEDs 52) mounted on the substrate 51 along a longitudinal direction of the substrate 51; an elongated light diffusion part 8 facing the plurality of light sources and diffusing light emitted from the plurality of light sources; an elongated light transmission part 7 facing the plurality of light sources via the light diffusion part 8 and transmitting the light diffused by the light diffusion part 8; and a holding part (cover part 6) holding the light transmission part 7. The holding part comprises a pair of sidewall parts 61, 62 holding the light transmission part 7 in a state of sandwiching a light axis C of the plurality of light sources therebetween in a short length direction of the substrate 51. The pair of sidewall parts 61, 62 include constricted parts 63, 64 protruding toward the light axis C, respectively.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a light source unit and a lighting fixture, and more particularly to a long light source unit and a lighting set.

  2. Description of the Related Art A long luminaire using an LED (Light Emitting Diode) is known. Specifically, the lighting fixture includes a long light source unit in which a plurality of LEDs are arranged along one direction (see, for example, Patent Document 1).

JP 2014-207249 A

  Here, if it is a lighting fixture using LED, glare (dazzle) will arise by the difference between each LED and the brightness of the circumference | surroundings, and there exists a possibility of giving a user discomfort at the time of illumination. There is also a desire to increase the lighting efficiency as a lighting fixture.

  An object of this invention is to provide the light source unit and lighting fixture which can improve illumination efficiency, suppressing the discomfort which a user learns at the time of illumination.

  A light source unit according to one embodiment of the present invention is a long light source unit, and is opposed to a long substrate, a plurality of light sources mounted on the substrate along a longitudinal direction of the substrate, and the plurality of light sources. And a long light diffusing unit that diffuses light emitted from a plurality of light sources, and a long light diffusing unit that faces the plurality of light sources through the light diffusing unit and transmits the light diffused by the light diffusing unit. And a holding portion that holds the light transmission portion, and the holding portion includes a pair of side wall portions that hold the light transmission portion in a state where the optical axes of the plurality of light sources are sandwiched in the short direction of the substrate. Each of the pair of side wall portions has a constricted portion protruding toward the optical axis.

  The lighting fixture which concerns on the other aspect of this invention is equipped with said light source unit and the fixture main body to which a light source unit is attached.

  ADVANTAGE OF THE INVENTION According to this invention, illumination efficiency can be improved, suppressing the discomfort which a user learns at the time of illumination.

It is a perspective view which shows the lighting fixture which concerns on embodiment. It is a disassembled perspective view which shows the lighting fixture which concerns on embodiment. It is sectional drawing of the light source unit by the III-III line in FIG. It is a top view which shows the module which concerns on embodiment. It is sectional drawing which shows schematic structure of the cover part which concerns on embodiment. It is a perspective view which removes a part of cover part which concerns on embodiment, and shows the internal structure of a cover part. It is a perspective view which removes a part of cover part which concerns on a modification, and shows the internal structure of a cover part. It is a perspective view which shows the recessed part which concerns on a modification.

  Hereinafter, embodiments will be specifically described with reference to the drawings. It should be noted that each of the embodiments described below shows a comprehensive or specific example. The numerical values, shapes, materials, constituent elements, arrangement positions of the constituent elements, order of connection forms, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept are described as optional constituent elements. Each figure is a mimetic diagram and is not necessarily illustrated strictly.

[overall structure]
Hereinafter, the lighting fixture which concerns on embodiment is demonstrated. FIG. 1 is an external view showing a lighting apparatus according to an embodiment. FIG. 2 is an exploded perspective view of the lighting fixture according to the embodiment.

  As shown in FIGS. 1 and 2, the luminaire 1 is, for example, a long luminaire that is directly attached to the ceiling. The lighting fixture 1 includes a fixture body 2 and a light source unit 3.

  The instrument body 2 is attached to, for example, an indoor ceiling using a suspension bolt (not shown). The instrument body 2 is formed in a box shape that is long and flat in the Y-axis direction by bending the sheet metal. The instrument body 2 is provided with an opening 21 communicating in the vertical direction, and the light source unit 3 is accommodated in the opening 21. The opening 21 has such a shape that the lower part expands when viewed in the Y-axis direction. The opening 21 extends in a long shape from one end to the other end in the longitudinal direction (Y-axis direction) of the instrument body 2. The instrument body 2 is colored white as a whole surface in order to increase the reflection efficiency. Thereby, the instrument main body 2 reflects the light irradiated from the light source unit 3.

[Light source unit]
Next, the light source unit 3 will be described.

  The light source unit 3 is detachably attached to the opening 21 of the instrument body 2.

  3 is a cross-sectional view of the light source unit 3 taken along line III-III in FIG.

  As shown in FIG. 3, the light source unit 3 includes a base member 4, a module 5, a cover part 6, and a light transmission part 7.

  The base member 4 is formed in a long shape in the Y-axis direction by bending the sheet metal. The base member 4 has a main body portion 41 and a pair of attachment portions 42 and 43. The main body 41 is for mounting the module 5 and is formed in a rectangular shape that is long in the Y-axis direction. The pair of attachment portions 42 and 43 are for attaching the base member 4 to the opening portion 21, respectively, and extend in substantially L shape from both end portions in the short direction (X-axis direction) of the main body portion 41. The tip portions 421 and 431 of the pair of attachment portions 42 and 43 are bent in an arc shape toward the outside. In addition, the boundary part of the main-body part 41 and a pair of attachment parts 42 and 43 is each formed in the step shape. The main body portion 41 is formed with a plurality of claw portions 46 for fixing the module 5 to the main body portion 41. The plurality of claw portions 46 are arranged at intervals along the longitudinal direction of the main body 41 at both ends in the short direction of the main body 41.

  The module 5 includes a substrate 51 and a plurality of LEDs 52 (light sources) mounted on the substrate 51.

  FIG. 4 is a plan view showing the module 5 according to the embodiment.

  As shown in FIG. 4, the substrate 51 is formed in a substantially rectangular shape that is long in the Y-axis direction. The board | substrate 51 is formed, for example with glass epoxy resin (CEM-3), and the printed wiring (not shown) is provided in the surface. A plurality of cutout portions 53 with which a plurality of claw portions 46 are individually engaged are formed on a pair of long sides extending in the Y-axis direction on the side surface of the substrate 51. The substrate 51 is fixed on the main body portion 41 of the base member 4 by the plurality of claw portions 46 engaging with the corresponding notch portions 53 respectively.

  The plurality of LEDs 52 are mounted on the substrate 51, and are arranged in a row and at intervals in the longitudinal direction of the substrate 51. For this reason, when viewed from the longitudinal direction, the optical axis C of each LED 52 substantially overlaps the same straight line (see FIG. 3). Each of the plurality of LEDs 52 is, for example, an LED element in which an LED chip (not shown) is packaged. That is, the mounting structure of the substrate 51 is an SMD (Surface Mount Device) structure in which an LED element packaged with an LED chip is mounted on the substrate 51. In addition, although the case where several LED52 was arranged in 1 row along the longitudinal direction of the board | substrate 51 was illustrated, two or more rows may be arranged.

[Cover]
Next, the cover part 6 will be described.

  FIG. 5 is a cross-sectional view illustrating a schematic configuration of the cover unit 6 according to the embodiment. Specifically, FIG. 5 is a diagram corresponding to FIG. In addition, since the whole cover part 6 is integrally molded by multicolor extrusion molding (multicolor molding), in FIG. 3, the whole cover part 6 is illustrated by the same hatching, but in FIG. 6 are shown by different hatching.

  As shown in FIGS. 3 and 5, the cover portion 6 is a member that covers the plurality of LEDs 52 from the light emitting side, and is a holding portion that holds the light transmitting portion 7.

  The cover part 6 includes a light diffusion part 8, a pair of side wall parts 61 and 62, a bottom part 67, and a pair of connecting parts 68 and 69.

  The light diffusion unit 8 is a light diffusion unit that diffuses light emitted from the plurality of LEDs 52. The light diffusion unit 8 is disposed between the plurality of LEDs 52 and the light transmission unit 7 so as to face the plurality of LEDs 52. The light diffusion portion 8 is formed in a curved shape that is convex toward the front in the light emission direction of the LED 52 when viewed from the longitudinal direction. By changing the curvature of the light diffusing unit 8, light distribution control in the short direction (X-axis direction) can be performed.

  Each of the pair of side wall portions 61 and 62 is constricted portions 63 and 64 protruding toward the optical axis C of the LED 52, and equal width portions extending in parallel to the optical axis C from the tips of the constricted portions 63 and 64. 65, 66. Note that, in the pair of side wall portions 61 and 62, one end portion closer to the LED 52 is a base end portion, and the other end portion far from the LED 52 is a distal end portion.

  The inner surfaces of the constricted portions 63 and 64 are reflecting surfaces that reflect at least part of the light from the LED 52. Specifically, the constricted portions 63 and 64 include first inclined portions 631 and 641 and second inclined portions 632 and 642, and the tip end portions of the first inclined portions 631 and 641 and the second inclined portion. The base ends of 632 and 642 are connected. The connected portions are the protruding vertices 633 and 643 in the constricted portions 63 and 64.

  The first inclined portions 631 and 641 have a flat plate shape and are inclined so as to approach the optical axis C as they are separated from the LED 52 in the optical axis direction. That is, the proximal end portions of the first inclined portions 631 and 641 are farthest from the optical axis C, and the distal end portions of the first inclined portions 631 and 641 are closest to the optical axis C. Because of such an inclination, the inner surfaces (reflection surfaces) of the first inclined portions 631 and 641 reflect at least part of the light from the LED 52 toward the rear in the light emitting direction of the LED 52.

  The second inclined portions 632 and 642 have a flat plate shape and are inclined so as to move away from the optical axis C as they are separated from the LED 52 in the optical axis direction. That is, the base end portions of the second inclined portions 632 and 642 are closest to the optical axis C, and the distal end portions of the second inclined portions 632 and 642 are farthest from the optical axis C. Because of such an inclination, the inner surfaces (reflection surfaces) of the second inclined portions 632 and 642 reflect at least part of the light from the LED 52 toward the front in the light emitting direction of the LED 52.

  And in a pair of side wall parts 61 and 62, each vertex 633, 643 is LED52 rather than the position (L1 / 2) of 1/2 of the length L1 along the optical axis C in a pair of side wall parts 61 and 62. Arranged on the side. Thereby, the area of the 2nd inclination part 632,642 can be made larger than the 1st inclination part 631,641, and the base end part of the 2nd inclination part 632,642 can be closely approached to LED52.

  In addition, protrusions 634 and 644 that protrude toward the optical axis C are provided on the inner surfaces of the tip portions of the second inclined portions 632 and 642. The protrusions 634 and 644 are portions that restrict the movement of the light transmitting portion 7 in the optical axis direction, specifically, the movement in the Z-axis direction minus side.

  The equal width portions 65 and 66 are flat portions parallel to the YZ plane that restrict the movement of the light transmission portion 7 in the short direction. The width H1 of the equal width portions 65 and 66 in the pair of side wall portions 61 and 62 is the width between the tip portions of the pair of side wall portions 61 and 62. The width H2 between the base end vibrations of the pair of side wall portions 61 and 62 is wider than the width H1.

  The bottom portion 67 is a flat plate-like portion parallel to the XY plane and spanned between the tip portions of the pair of side wall portions 61 and 62. On the upper surface of the bottom portion 67, the light transmission portion 7 is placed.

  The pair of connecting portions 68 and 69 are portions that connect the base end portions of the pair of side wall portions 61 and 62 and the light diffusing portion 8. Specifically, the pair of connecting portions 68 and 69 include flat plate portions 681 and 691 and standing portions 682 and 692 that stand from the upper surfaces of the flat plate portions 681 and 691. The flat plate portions 681 and 691 are flat portions parallel to the XY plane, and connect the base end portions of the first inclined portions 631 and 641 and the end portions of the light diffusion portion 8 in the pair of side wall portions 61 and 62. doing. The standing portions 682 and 692 are erected upward from the upper surfaces of the flat plate portions 681 and 691, and their tip portions are bent toward the optical axis C side. The tip portions 421 and 431 of the mounting portions 42 and 43 in the base member 4 are locked by the tip portions of the standing portions 682 and 692. Thereby, the base member 4 and the cover part 6 are assembled | attached.

  Here, as described above, the cover 6 is formed by multicolor molding. For this reason, although the light-diffusion part 8, a pair of side wall parts 61 and 62, the bottom part 67, and a pair of connection part 68 and 69 are integrally molded, these can be formed with resin from which a composition differs. it can.

  For example, among the pair of side wall portions 61 and 62, the light diffusion portion 8, the bottom portion 67, and the pair of connection portions 68 and 69, the bottom portion 67 has the highest light transmittance, and the pair of connection portions 68 and 69 have the highest light transmittance. The resin that forms each part may be selected so that the value is low.

  In the bottom portion 67, the light transmittance is set to such an extent that the luminance of the light diffused by the light diffusion portion 8 is not lowered as much as possible. Specifically, the light transmittance of the bottom 67 may be 90% or more. Examples of the resin forming the bottom 67 include a transparent acrylic resin or polycarbonate resin.

  In the connection parts 68 and 69, it is desired that the light reaching the connection parts 68 and 69 out of the light emitted from the LED 52 is reflected without being transmitted and directed forward in the light emitting direction. For this reason, the light transmittance of the connecting portions 68 and 69 is preferably 0%. Examples of the resin forming the connecting portions 68 and 69 include white acrylic resin or polycarbonate resin.

  In the light diffusion portion 8, the transmittance is set lower than that of the bottom portion 67 and higher than that of the connecting portions 68 and 69. That is, the transmittance of the light diffusing unit 8 may be within a range of greater than 0% and less than 90%. Examples of the resin forming the light diffusion portion 8 include milky acrylic resin or polycarbonate resin.

  In the pair of side wall portions 61 and 62, the transmittance is set lower than that of the bottom portion 67 and higher than that of the connecting portions 68 and 69. That is, the transmittance of the side wall portions 61 and 62 only needs to be within a range of greater than 0% and less than 90%. Examples of the resin forming the side wall portions 61 and 62 include milky acrylic resin or polycarbonate resin. Because of such transmittance, the side wall portions 61 and 62 reflect a part of the light diffused by the light diffusion portion 8 on the inner surface and transmit the remaining light. Thereby, the whole cover part 6 light-emits.

  In the present embodiment, it is assumed that the light diffusion portion 8 and the pair of side wall portions 61 and 62 are formed of a resin having the same composition. That is, the light diffusion part 8 and the pair of side wall parts 61 and 62 have the same transmittance. Thereby, since the whole cover part 6 is formed of three types of resins, the light diffusion part 8, the pair of side wall parts 61, 62, the bottom part 67, and the pair of connecting parts 68, 69 are all of different compositions. Compared with the case of forming with resin, multicolor molding can be easily performed. The light diffusing part 8 and the side wall parts 61 and 62 do not have to have the same light transmittance.

  The light transmission unit 7 is a long optical member that faces the plurality of LEDs 52 through the light diffusion unit 8 and transmits the light diffused by the light diffusion unit 8. Specifically, the light transmission portion 7 is disposed between the bottom portion 67 of the cover portion 6 and the protrusions 634 and 644, and is placed on the upper surface of the bottom portion 67. The light transmission part 7 is made of a material having a higher transmittance than the light diffusion part 8. The light transmission part 7 is a substantially flat linear Fresnel lens made of, for example, a transparent acrylic resin or polycarbonate resin.

  FIG. 6 is a perspective view showing the internal structure of the cover unit 6 with a part of the cover unit 6 according to the embodiment removed, and shows the shape of the lower surface of the light transmission unit 7.

  As shown in FIG. 6, the lower surface of the light transmitting portion 7 is a lens surface 71, and the lens surface 71 is provided with a prism shape including a plurality of grooves 72. The plurality of grooves 72 are arranged in the Y-axis direction and extend along the X-axis direction. By adjusting the prism shape of the light transmitting portion 7, light distribution control in the Y-axis direction can be easily performed.

[Operation of lighting equipment]
Next, operation | movement of the lighting fixture 1 is demonstrated.

  The light emitted from the LED 52 reaches the light diffusion unit 8 and is diffused, and enters the inside of the cover unit 6. Here, since the light diffusing portion 8 is formed in a curved shape that protrudes toward the light transmitting portion 7 when viewed from the longitudinal direction, the light transmitted through the light diffusing portion 8 is distributed in the X-axis direction. Be controlled.

  In the cover part 6, a part of the light reaching the first inclined parts 631 and 641 of the constricted parts 63 and 64 is transmitted through the first inclined parts 631 and 641 and emitted to the outside of the cover part 6. Other lights that have reached the first inclined portions 631 and 641 of the constricted portions 63 and 64 are reflected by the inner surfaces of the first inclined portions 631 and 641 and travel through the cover portion 6 again.

  Further, in the cover part 6, part of the light that has reached the second inclined parts 632 and 642 of the constricted parts 63 and 64 passes through the second inclined parts 632 and 642 and is emitted to the outside of the cover part 6. The Most of the other light reaching the second inclined portions 632 and 642 of the constricted portions 63 and 64 is reflected by the inner surfaces of the second inclined portions 632 and 642 and travels toward the light transmitting portion 7.

  In the cover part 6, the light that reaches the pair of connection parts 68 and 69 is reflected by the pair of connection parts 68 and 69 and travels in the cover part 6.

  In the cover part 6, the light that has reached the light transmission part 7 is transmitted through the light transmission part 7 and the bottom part 67 and is emitted from the bottom part 67 to the outside of the cover part 6. The light transmitted through the light transmission unit 7 is controlled by the light transmission unit 7 in the Y-axis direction.

[Effects]
As described above, in the light source unit 3 according to the present embodiment, each of the pair of side wall portions 61 and 62 includes the constricted portions 63 and 64 that protrude toward the optical axis C. 64, the inner surfaces of the second inclined portions 632 and 642 face forward in the light emitting direction. Thereby, the light irradiated from LED52 is reflected by the inner surface of the 2nd inclination part 632,642, The said light can be guide | induced to the front of a light emission direction. Therefore, the light can be collected in front of the light emission direction with a small number of reflections, and the illumination efficiency can be improved.

  Moreover, since the light diffusion part 8 is provided so as to face the plurality of LEDs 52, the light transmitted through the light diffusion part 8 can be diffused. Therefore, glare can be suppressed.

  Furthermore, since the light transmission part 7 is provided so as to face the LED 52 through the light diffusion part 8, the light distribution can also be controlled by the light transmission part 7.

  By these things, illumination efficiency can be improved, reducing a glare.

  Since the narrow portions 63 and 64 are provided in the pair of side wall portions 61 and 62, the strength of the cover portion 6 as a whole can be increased as compared with the flat side wall portions.

  In addition, since the protruding vertices 633 and 643 in the constricted portions 63 and 64 are disposed on the LED 52 side with respect to the position of ½ of the length along the optical axis C in the pair of side wall portions 61 and 62, the first The area of the two inclined portions 632 and 642 can be made larger than that of the first inclined portions 631 and 641, and the base end portions of the second inclined portions 632 and 642 can be made closer to the LED 52.

  Further, since the pair of side wall portions 61 and 62, the light diffusing portion 8, the bottom portion 67, and the pair of connecting portions 68 and 69 are integrally formed, the number of parts can be reduced. Further, a bottom portion 67 is provided between the tip portions of the pair of side wall portions 61 and 62 so as to be continuous therewith. A pair of connecting portions 68 and 69 and a light diffusing portion 8 are provided between the base end portions of the pair of side wall portions 61 and 62 in succession. That is, when viewed from the longitudinal direction, the cover portion 6 is a continuous annular body, so that the shape of the entire cover portion 6 can be stabilized.

  Of the pair of side wall portions 61 and 62, the light diffusion portion 8, the bottom portion 67, and the pair of connection portions 68 and 69, the bottom portion 67 has the highest light transmittance, and the pair of connection portions 68 and 69 have the highest light transmittance. Therefore, light can be emitted not only from the bottom portion 67 but also from the pair of side wall portions 61 and 62. Since the light transmitted through the pair of side wall portions 61 and 62 illuminates the inside of the opening 21 of the instrument body 2, an impression having integrity with the opening 21 can be given.

  Further, since the width H2 between the base end portions of the pair of side wall portions 61, 62 is wider than the width H1 between the tip end portions of the pair of side wall portions 61, 62, the distal end portions of the first inclined portions 631, 641 are The second inclined portions 632 and 642 are disposed outside the front end portions. The light transmitted through the second inclined portions 632 and 642 and emitted to the outside generally travels upward (backward in the light emission direction), but passes through the first inclined portions 631 and 641 and is emitted to the outside. The emitted light travels generally downward (forward in the light emission direction). That is, since the light traveling forward in the light emitting direction surrounds the light traveling backward, it is possible to give the user an impression that the entire light source unit 3 emits light.

  Further, since the light transmission unit 7 has a higher transmittance than the light diffusion unit 8, light distribution can be easily controlled even for light diffused by the light diffusion unit 8.

  In addition, since the light diffusing portion 8 has a curved shape that is convex toward the light transmitting portion 7 when viewed from the longitudinal direction, the light distribution in the short direction can also be controlled by the light diffusing portion 8.

  Further, since the light transmission part 7 has a prism shape, the light distribution control of the light transmitted through the light transmission part 7 can be performed by adjusting the prism shape of the light transmission part 7.

[Modification]
As mentioned above, although the lighting fixture which concerns on embodiment was demonstrated, this invention is not limited to the said embodiment. In the following description, the same parts as those in the above embodiment may be denoted by the same reference numerals and description thereof may be omitted.

  In the above-described embodiment, the case where the light transmitting portion 7 has a prism shape including a plurality of grooves 72 has been described as an example. However, the light transmitting portion 7A of this modification has concave portions arranged in a matrix. The case of having a prism shape made of

  FIG. 7 is a perspective view showing the internal structure of the cover part 6A with a part of the cover part 6A according to the modification removed, and shows the shape of the lower surface of the light transmission part 7A.

  As shown in FIG. 7, the lower surface of the light transmitting portion 7A is a lens surface 71A, and the lens surface 71A is provided with a prism shape including a plurality of concave portions 73 arranged in a matrix. The plurality of recesses 73 are arranged in close contact with each other in the longitudinal direction and the short direction.

  FIG. 8 is a perspective view showing a recess 73 according to a modification.

  As shown in FIG. 8, the recess 73 is a quadrangular pyramid-shaped recess. Light is refracted by each surface 731 forming the recess 73 to control the light distribution in the longitudinal direction and the short direction. In addition, although the recessed part 73 is square shape by planar view, the planar shape of the recessed part 73 is not limited to this, Other polygonal shapes other than a square shape and a rectangle may be sufficient. When the polygon is a pentagon or more, light distribution control in more directions is possible. In this modification, the prism shape including the plurality of concave portions 73 is described as an example, but the prism shape including a plurality of convex portions may be used.

[Other embodiments]
Moreover, in the said embodiment and modification, although the case where the constricted parts 63 and 64 were bent was demonstrated and demonstrated, the constricted part narrowed by curving may be sufficient.

  In the above embodiment, the case where the pair of side wall portions 61 and 62 transmits light has been described as an example. However, if importance is given to reflection, the transmittance of the pair of side wall portions 61 and 62 is set to 0%. It may be.

  Moreover, in the said embodiment and modification, although the case where the whole cover part 6 was integrally molded by multi-color molding of resin was illustrated and demonstrated, for example, a cover part is insert-molded by resin-molding a metal part. You may form integrally. In this case, a portion (for example, a pair of connecting portions and a pair of side wall portions) whose light transmittance may be zero can be a metal part.

  Moreover, in the said embodiment, although the cover part 6 which has the bottom part 67 was illustrated, the cover part 6 without a bottom part may be sufficient. In this case, since the light transmitted through the light transmitting portion 7 is directly emitted outside the cover portion 6, it is possible to suppress a decrease in luminance.

  In the above embodiment, the case where the light diffusion portion 8 is integrally formed with the pair of connecting portions 68 and 69, the pair of side wall portions 61 and 62, and the bottom portion 67 has been described as an example. May not be integrally molded. In this case, it is not necessary to form the light diffusing portion 8 by multicolor extrusion molding, so the degree of freedom in designing the light diffusing portion 8 can be increased. Therefore, the light diffusing unit 8 having a prism shape can be provided, and the multi-directional orientation can be controlled by the light diffusing unit 8.

  Furthermore, you may combine the said embodiment and the said modification, respectively.

DESCRIPTION OF SYMBOLS 1 Lighting fixture 2 Appliance main body 3 Light source unit 4 Base member 5 Module 6, 6A Cover part (holding part)
7, 7A Light transmission part 8 Light diffusion part 21 Opening part 41 Main body part 42, 43 Attachment part 46 Claw part 51 Substrate 52 LED (light source)
53 Notch portion 61, 62 Side wall portion 63, 64 Constricted portion 65, 66 Equal width portion 67 Bottom portion 68, 69 Connecting portion 71, 71A Lens surface 72 Groove 73 Recessed portion 421, 431 Tip portion 631, 641 First inclined portion 632 642 Second inclined portion 633, 643 Apex 634, 644 Protrusion 681, 691 Flat plate portion 682, 692 Standing portion 731 Surface C Optical axis

Claims (9)

A long light source unit,
A long substrate;
A plurality of light sources mounted on the substrate along a longitudinal direction of the substrate;
A long light diffusing unit facing the plurality of light sources and diffusing light emitted from the plurality of light sources;
A long light transmission part that faces the plurality of light sources via the light diffusion part and transmits light diffused by the light diffusion part,
A holding part for holding the light transmission part,
The holding part is
In a state where the optical axes of the plurality of light sources are sandwiched between each other in the short direction of the substrate, a pair of side wall portions for holding the light transmission portion is provided.
Each of the pair of side wall portions has a constricted portion protruding toward the optical axis. The light source unit according to claim 1, wherein an apex of the constricted portion is disposed on the light source side with respect to a position of ½ of the length along the optical axis in the pair of side wall portions. The holding part is
further,
A bottom portion that is bridged between the distal end portions on the side far from the light source in the pair of side wall portions and has translucency;
A pair of connecting portions that connect the base end portion on the side close to the light source in the pair of side wall portions and the light diffusion portion;
The light source unit according to claim 1, wherein the pair of side wall portions, the light diffusion portion, the bottom portion, and the pair of connection portions are integrally formed. The pair of side wall portions, the light diffusion portion, the bottom portion, and the pair of connection portions, the bottom portion has the highest light transmittance, and the pair of connection portions has the lowest light transmittance. Light source unit. The light source unit according to claim 4, wherein a width of the base end portions in the pair of side wall portions is wider than a width of the tip end portions of the pair of side wall portions. The light source unit according to claim 1, wherein the light transmission unit has a light transmittance higher than that of the light diffusion unit. The light source unit according to claim 1, wherein the light diffusion portion has a curved shape that is convex toward the light transmission portion when viewed from the longitudinal direction. The light source unit according to claim 1, wherein the light transmission part has a prism shape. The light source unit according to any one of claims 1 to 8,
A fixture body to which the light source unit is attached.

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