JP2023072357A - Light source unit and lighting fixture - Google Patents

Abstract

To provide a light source unit capable of easily changing light distribution, and to provide a lighting fixture.SOLUTION: A lighting fixture 1 includes a base unit U1, and a light source unit U2. The light source unit U2 includes a light source 22, and a light cover part 80. The light source 22 emits light L. The light cover part 80 covers the light source 22. The light cover part 80 is constituted by a non-transmission reflection member 82 which does not allow the light L to transmit but reflects it to the inside D, and a transmission diffusion member 83 which transmits and diffuses the light L.SELECTED DRAWING: Figure 3

Description

The present invention relates to a light source unit and a lighting fixture.

Patent Literature 1 discloses a lighting fixture having a module cover made of a translucent resin material. The module cover protects the LEDs (Light Emitting Diodes) and diffuses the light from the LEDs, thereby making the luminaire function as so-called general diffuse lighting.

JP 2015-72886 A

In Patent Literature 1, only general diffuse lighting is assumed for light distribution, and other light distributions such as indirect lighting are not assumed. In this way, it has not been assumed that conventional general lighting fixtures change the light distribution.

SUMMARY OF THE INVENTION An object of the present invention is to provide a light source unit and a lighting fixture capable of easily changing light distribution.

A light source unit disclosed in the present application includes a light source that emits light and a light cover that covers the light source. The light cover portion includes an impermeable reflective member that reflects the light without transmitting it, and a transmissive diffusion member that transmits and diffuses the light.

In the light source unit disclosed in the present application, the light cover section has a first cover section, a second cover section, and a third cover section. The first cover part and the second cover part face each other with a gap therebetween. The third cover portion is interposed between the first cover portion and the second cover portion and faces the light emitting surface of the light source.

In the light source unit disclosed in the present application, at least one of the first cover portion, the second cover portion, and the third cover portion is composed of the non-transmissive reflective member, and the rest is composed of the transmissive diffusion member. It is

In the light source unit disclosed in the present application, at least one of the first cover portion, the second cover portion, and the third cover portion is composed of both the non-transmissive reflective member and the transmissive diffusion member.

In the light source unit disclosed in the present application, concave portions, convex portions, or concave-convex portions are formed on the inner surface of the portion of the light cover portion formed of the non-transmissive reflective member.

In the light source unit disclosed in the present application, the portion of the light cover portion formed of the transmission diffusion member has a different transmittance depending on the portion.

In the light source unit disclosed in the present application, the light cover portion is a two-color molded product of the non-transmissive reflective member and the transmissive diffusion member.

A lighting fixture disclosed in the present application includes the light source unit.

ADVANTAGE OF THE INVENTION According to this invention, the light source unit and lighting fixture which can change light distribution easily can be provided.

It is a perspective view showing a lighting fixture concerning an embodiment. It is an exploded perspective view showing a lighting fixture concerning an embodiment. FIG. 2 is a cross-sectional view of the luminaire along line III-III of FIG. 1; It is an exploded perspective view showing a mounting member. 2 is a cross-sectional view of the luminaire along line VV of FIG. 1; FIG. It is a sectional view showing modification 1 of a lighting fixture. It is a sectional view showing modification 2 of a lighting fixture. It is a sectional view showing modification 3 of a lighting fixture. It is a sectional view showing modification 4 of a lighting fixture.

An embodiment of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.

<Embodiment 1>
A lighting fixture 1 according to Embodiment 1 will be described with reference to FIGS. 1 and 2. FIG. FIG. 1 is a perspective view showing a lighting fixture 1 according to Embodiment 1. FIG. FIG. 2 is an exploded perspective view showing the lighting fixture 1 according to Embodiment 1. FIG.

The lighting fixture 1 is a substantially rectangular parallelepiped elongated in the first direction P. As shown in FIG. Here, two directions perpendicular to the first direction P are defined as a second direction Q and a third direction R. As shown in FIG. The lighting fixture 1 includes a base unit U1 and a light source unit U2. The base unit U1 and the light source unit U2 are arranged in the third direction R.

The base unit U1 includes a base member 11, a closing member 12, and a power supply section 13. As shown in FIG.

The base member 11 is made of metal, for example, in consideration of the heat dissipation of the power supply section 13 and the light source unit U2. The base member 11 extends along the first direction P. As shown in FIG. The base member 11 has a first base portion 11a, a second base portion 11b, and a third base portion 11c. The first base portion 11a, the second base portion 11b, and the third base portion 11c each have, for example, a substantially flat plate shape. The first base portion 11a and the second base portion 11b are opposed to each other along the second direction Q with a gap therebetween. A third base portion 11c is interposed between the first base portion 11a and the second base portion 11b.

The base member 11 is a member for installing the light source unit U2 on a mounting body (not shown). The mounting body is a member capable of supporting the luminaire 1, such as the ceiling of a building room. The base member 11 is attached to the attachment body. In this embodiment, the third base portion 11c of the base member 11 is attached to the attachment body.

The closing member 12 is arranged at the end of the base member 11 in the first direction P to close the end. In this embodiment, the closing member 12 is attachable to and detachable from the base member 11 . A pair of closing members 12 are provided. Each of the pair of closing members 12 has, for example, a substantially flat plate shape. One of the pair of closing members 12 is arranged at the end of the base member 11 on one side P1 in the first direction P to close the end of the base member 11 on one side. The other of the pair of closing members 12 is arranged at the end of the base member 11 on the other side P2 in the first direction P to close the other end of the base member 11 . The base member 11 and the pair of closing members 12 may be separate members or integral members.

The power supply section 13 supplies power to the light source unit U2. The power supply unit 13 is arranged inside C of the base member 11 . Note that the power supply unit 13 may be arranged outside the base member 11 .

The light source unit U2 extends along the first direction P. As shown in FIG. Light source unit U<b>2 includes light emitting module 20 , cover member 30 , holding member 50 , mounting member 60 , and mounting member 70 . In this embodiment, the light source unit U2 has a substantially rectangular parallelepiped shape elongated in the first direction P, but is not limited to this shape.

The light source unit U2 is attachable to and detachable from the base member 11 . In other words, the light source unit U2 is separate from the base member 11 and has a configuration that allows it to be attached to and detached from the base member 11 . In this embodiment, the light source unit U2 is configured to be detachable from the base member 11 by means of the mounting member 60. As shown in FIG.

The light emitting module 20 emits light. The light emitting module 20 is, for example, an LED (Light Emitting Diode) module. The light emitting module 20 extends along the first direction P. As shown in FIG. Specifically, the light emitting module 20 includes a mounting member 21 and one or more light sources 22 . The mounting member 21 is, for example, a substrate on which one or more light sources 22 are mounted. In this embodiment, the plurality of light sources 22 are arranged in a row along the first direction P. As shown in FIG. Note that the plurality of light sources 22 may be arranged in parallel along the first direction P in a plurality of rows.

Each of the plurality of light sources 22 emits light. Each of the plurality of light sources 22 is, for example, a light emitting element such as an LED. Specifically, each of the plurality of light sources 22 is, for example, an SMD (Surface Mount Device) element or a COB (Chip On Board) element. The light source 22 has, for example, a substantially rectangular parallelepiped shape, and emits light from one of the six surrounding surfaces. In this embodiment, of the six surfaces around the light source 22, the surface from which light is emitted is the light emitting surface 22a (see FIG. 3, which will be described later). The light-emitting surface 22 a is the back surface of the surface facing the mounting member 21 .

The holding member 50 holds the mounting member 21 . The holding member 50 has a substantially elongated shape elongated in the first direction P. As shown in FIG. The holding member 50 is made of metal, for example.

Cover member 30 includes a light cover portion 80 and an entrance portion 90 . The light cover portion 80 includes at least a first cover portion 80a, a second cover portion 80b, and a third cover portion 80c. The light cover portion 80 may include a fourth cover portion 40a and a fifth cover portion 40b in addition to the first cover portion 80a, the second cover portion 80b, and the third cover portion 80c.

The light cover part 80 is a cover member that covers the light emitting module 20 . The light cover portion 80 extends along the first direction P. As shown in FIG. The light cover portion 80 has a first cover portion 80a, a second cover portion 80b, and a third cover portion 80c. Each of the first cover portion 80a, the second cover portion 80b, and the third cover portion 80c has, for example, a substantially flat plate shape. The first cover portion 80a and the second cover portion 80b are opposed to each other along the second direction Q with a gap therebetween. A third cover portion 80c is interposed between the first cover portion 80a and the second cover portion 80b. The interior D of the light cover portion 80 is hollow, and the third cover portion 80c and the light emitting surfaces 22a (see FIG. 3) of the plurality of light sources 22 face each other.

Each of the fourth cover portion 40a and the fifth cover portion 40b has a substantially flat plate shape. The fourth cover portion 40a is arranged at the end portion of the one side P1 in the first direction P of the optical cover portion 80 and closes the end portion of the one side P1. The fifth cover portion 40b is arranged at the end portion of the other side P2 in the first direction P of the optical cover portion 80, and closes the end portion of the other side P2. The fourth cover portion 40a and the fifth cover portion 40b are respectively joined to the light cover portion 80 by welding, adhesive, or the like. The fourth cover portion 40a, the fifth cover portion 40b, and the light cover portion 80 may be separate members or may be an integral member.

The entrance portion 90 is connected to the light cover portion 80 . The entry portion 90 extends along the first direction P. As shown in FIG. The entry portion 90 can enter the inside C of the base member 11 .

Next, the lighting fixture 1 will be further described with reference to FIG. FIG. 3 is a cross-sectional view of the luminaire 1 along line III-III in FIG.

The base member 11 has, for example, a substantially U-shaped cross section. A first opening 14 is formed in the base member 11 . The first opening 14 is located at the end of the base member 11 on the other side R2 in the third direction R. As shown in FIG. The first opening 14 is a region between the first end portion 11d and the second end portion 11e. The first end portion 11d is the end portion on the other side R2 in the third direction R of the first base portion 11a. The second end portion 11e is the end portion on the other side R2 in the third direction R of the second base portion 11b.

The light cover portion 80 has, for example, a substantially U-shaped cross section. The light cover portion 80 covers the multiple light sources 22 . Specifically, the light cover part 80 covers the side of each light emitting surface 22 a of the plurality of light sources 22 . A second opening 81 is formed in the light cover portion 80 . The second opening 81 is positioned at the end of the one side R1 in the third direction R of the light cover portion 80 . The second opening 81 is a region between the third end 80d and the fourth end 80e. The third end portion 80d is an end portion on one side R1 in the third direction R of the first cover portion 80a. The fourth end portion 80e is the end portion of the second cover portion 80b on one side R1 in the third direction R. As shown in FIG. In addition, the shape of the light cover portion 80 is not limited to a substantially U-shaped cross section, and may be a substantially triangular cross-sectional shape, a substantially semicircular cross-sectional shape, or the like.

When the light source unit U2 is attached to the base member 11, the third end 80d contacts the first end 11d, and the fourth end 80e contacts the second end 11e. As a result, entry of the light cover portion 80 into the interior C of the base member 11 is restricted.

The entrance section 90 includes a first entrance body 91 and a second entrance body 92 . The first entrance body 91 and the second entrance body 92 are opposed to each other along the second direction Q with a gap therebetween. The first entrance body 91 and the second entrance body 92 are provided continuously with the light cover portion 80 respectively. Specifically, the first inserting body 91 is provided continuously with the third end portion 80d, and the second inserting body 92 is provided continuously with the fourth end portion 80e. Each of the first inserting body 91 and the second inserting body 92 has a bent shape that bends substantially at right angles at a plurality of points. Therefore, the first entrance body 91 and the second entrance body 92 come closer to each other step by step as the distance from the light cover portion 80 increases.

The holding member 50 includes a first holding portion 51 , a second holding portion 52 and a mounting surface 53 .

The first holding portion 51 is provided corresponding to the entering portion 90 and engages with the entering portion 90 . The first holding portion 51 has a first holding body 51a and a second holding body 51b. The first holding body 51a is formed on one side Q1 of the holding member 50 in the second direction Q. As shown in FIG. The first holding body 51 a has a curved shape along the tip of the first inserting body 91 . Therefore, the tip of the first inserting body 91 can be fitted into the first holding body 51a. The second holding body 51b is formed on the other side Q2 of the holding member 50 in the second direction Q. As shown in FIG. The second holding body 51b has a curved shape along the tip of the second inserting body 92 . Therefore, the tip of the second inserting body 92 can be fitted into the second holding body 51b.

The second holding portion 52 is provided corresponding to the mounting member 21 and engages with the mounting member 21 . The second holding part 52 has a third holding body 52a and a fourth holding body 52b. The third holding body 52a is formed on one side Q1 of the holding member 50 in the second direction Q. As shown in FIG. The third holding body 52a has a curved shape along the proximal end portion of the first inserting body 91 . Therefore, the proximal end portion of the first inserting body 91 can be fitted into the third holding body 52a. The fourth holding body 52b is formed on the other side Q2 of the holding member 50 in the second direction Q. As shown in FIG. The fourth holding body 52b has a curved shape along the tip of the second inserting body 92. As shown in FIG. Therefore, the proximal end portion of the second inserting body 92 can be fitted into the fourth holding body 52b.

The third holding body 52a has a bent shape along the end portion of the one side Q1 in the second direction Q of the mounting member 21 . Therefore, the end of the one side Q1 of the mounting member 21 can be fitted into the third holding body 52a. The fourth holding body 52b has a bent shape along the end of the mounting member 21 on the other side Q2 in the second direction Q. As shown in FIG. Therefore, the end of the other side Q2 of the mounting member 21 can be fitted into the fourth holding body 52b.

By providing the first holding body 51a and the second holding body 51b, the holding member 50 is slidably supported along the first direction P by the entrance portion 90 . Therefore, the holding member 50 can be attached to and detached from the entering portion 90 by sliding the holding member 50 while engaging it with the entering portion 90 . The holding member 50 supports the mounting member 21 slidably along the first direction P by providing the third holding body 52a and the fourth holding body 52b. Therefore, the mounting member 21 can be attached to and detached from the holding member 50 by sliding the mounting member 21 while engaging it with the holding member 50 .

The mounting surface 53 is the surface of the holding member 50 on the back side of the surface on which the second holding portion 52 is formed. An attachment member 60 is attached to the attachment surface 53 . The mounting member 60 is made of metal and has elasticity. The mounting member 60 is fixed to the base member 11 in a state in which the entering portion 90 has entered the inside C of the base member 11 . Specifically, the mounting member 60 is crimped to the inner surface of the base member 11 due to the elasticity of the mounting member 60 in a state in which the entering portion 90 has entered the interior C of the base member 11 . As a result, the light source unit U<b>2 is attached to the base member 11 .

The outer surface of the first base portion 11a and the outer surface of the first cover portion 80a are flush with each other. The outer surface of the second base portion 11b and the outer surface of the second cover portion 80b are flush with each other. As a result, the outer shape of the lighting fixture 1 becomes a substantially rectangular parallelepiped shape, which enhances the design.

Here, the optical cover portion 80 will be further described.
The light cover portion 80 is composed of an impermeable reflective member 82 and a transmissive diffusion member 83 . The non-transmissive reflective member 82 is a member that reflects the light emitted by the light source 22 to the inside D without transmitting the light. The non-transmissive reflective member 82 is, for example, white resin. The transmissive diffusion member 83 is a member that transmits the light emitted from the light source 22, emits the light to the outside of the light cover portion 80, and diffuses the emitted light to the outside.

The light cover portion 80 may be composed of a member that reflects light to the interior D without transmitting light and a member that transmits and diffuses light. That is, the impermeable reflective member 82 is not limited to white resin, and may be metal or the like. Alternatively, the impermeable reflective member 82 may be realized by applying an impermeable reflective paint to the outer surface or inner surface of the transmission diffusion member. The transmission diffusion member 83 is not limited to a milky white resin, and may be a resin containing a light diffusion material, a member having a rough surface, or the like.

In this embodiment, the second cover portion 80b is composed of the impermeable reflective member 82, and the first cover portion 80a and the third cover portion 80c are composed of the transmission diffusion member 83. As shown in FIG. Of the light emitted from the light source 22, the light L directed toward the second cover portion 80b is reflected by the inner surface of the second cover portion 80b. On the other hand, of the light emitted from the light source 22, the light L directed toward the first cover portion 80a and the third cover portion 80c is transmitted through the first cover portion 80a and the third cover portion 80c and diffused. Therefore, the luminaire 1 can be used as illumination with a light distribution in which one side Q1 in the second direction Q and the other side R2 in the third direction R are relatively bright, and the other side Q2 in the second direction Q is relatively dark. Become.

For example, when the third base portion 11c is attached to the ceiling, the second direction Q is the lateral direction, and the third direction R is the vertical direction. The light distribution of the lighting fixture 1 according to this embodiment is a light distribution in the horizontal direction. The lighting fixture 1 according to Embodiment 1 is attached to the ceiling in the vicinity of the indoor wall surface, and the first cover portion 80a composed of the transmission diffusion member 83 is directed toward the indoor wall surface, so that the light transmitted through the first cover portion 80a reaches the wall surface of the room, and the lighting fixture 1 becomes a wall washer light. The second cover portion 80b composed of the non-transmissive reflective member 82 can reduce glare for the user facing the interior wall surface side.

In this embodiment, the second cover portion 80b is composed of the impermeable reflective member 82, and the first cover portion 80a and the third cover portion 80c are composed of the transmission diffusion member 83, but the present invention is not limited to this configuration. For example, as in Modification 1 (see FIG. 6), which will be described later, the third cover portion 80c is composed of the non-transmissive reflective member 82, and the first cover portion 80a and the second cover portion 80b are composed of the transmissive diffusion member 83. may be In this manner, a certain portion of the light cover portion 80 is configured with the non-transmissive reflective member 82 and a certain portion is configured with the transmissive diffusion member 83, so that the light distribution can be easily changed. Also, by exchanging the light cover portion 80 of the first embodiment with the light cover portion 80 of the first modification, the light distribution can be easily changed.

The light cover part 80 is, for example, an extruded two-color molded product formed by two-color molding, which is composed of an impermeable reflective member 82 and a transmissive diffusion member 83 . By manufacturing the light cover part 80 by extrusion two-color molding, the number of parts can be reduced compared to the case of manufacturing the light cover part 80 by assembling the non-transmissive reflection member 82 and the transmission diffusion member 83 which are separate members. can be done. Further, by manufacturing the light cover portion 80 by two-color extrusion molding, the manufacturing process is reduced compared to the case where the light cover portion 80 is manufactured by assembling the non-transmissive reflection member 82 and the transmission diffusion member 83 which are separate members. can do. As a result, it is possible to reduce the cost of manufacturing the lighting fixture 1 . Further, in the light cover portion 80 manufactured by two-color extrusion molding, a gap is less likely to occur at the boundary between the non-transmissive reflective member 82 and the transmissive diffusion member 83 . Therefore, the boundary is inconspicuous and the design is not spoiled. In addition, it is difficult for the direct light from the light source 22 to leak to the outside of the light cover part 80 due to the fact that the gap is less likely to occur, so that the occurrence of glare for the user can be reduced. Note that the method for manufacturing the light cover portion 80 is not limited to two-color extrusion molding. Further, the second cover portion 80b composed of the impermeable reflective member 82 and the first and third cover portions 80a and 80c composed of the transmissive diffusion member 83 may be integral members or separate members. may be

Among conventional lighting fixtures, there are some in which a member corresponding to the light cover portion is manufactured by two-color molding. However, such a conventional lighting fixture only adopts two-color molding for the purpose of providing a design that replaces paint finish, etc., and changes the light distribution like the lighting fixture 1 according to the present embodiment. not employed for the purpose of

Next, the mounting member 70 will be described with reference to FIGS. 4 and 5. FIG. FIG. 4 is an exploded perspective view showing the mounting member 70. FIG. FIG. 5 is a cross-sectional view of the luminaire 1 taken along line VV in FIG.

The mounting member 70 is arranged at the end in the first direction P of the holding member 50 . The mounting member 70 has a body portion 71 , a first engaging portion 72 , a second engaging portion 73 and a contact portion 74 . A first engaging portion 72 , a second engaging portion 73 , and a contact portion 74 are connected to the body portion 71 . In this embodiment, the body portion 71, the first engaging portion 72, the second engaging portion 73, and the contact portion 74 are integrally molded. The body portion 71 has a substantially flat plate shape. The first engaging portion 72 and the second engaging portion 73 are arranged in the second direction Q to face each other with a space therebetween. Each of the first engaging portion 72 and the second engaging portion 73 protrudes from the main body portion 71 along the first direction P. As shown in FIG.

The first engaging portion 72 has a shape corresponding to the space F1 surrounded by the first holding body 51a and the third holding body 52a. The first engagement portion 72 fits into the space F1. Further, the second engaging portion 73 has a shape corresponding to the space F2 surrounded by the second holding body 51b and the fourth holding body 52b. The second engaging portion 73 fits into the space F2. The attachment member 70 is attached to the holding member 50 by fitting the first engaging portion 72 into the space F<b>1 and fitting the second engaging portion 73 into the space F<b>2 .

As shown in FIG. 5, the contact portion 74 contacts the fifth cover portion 40b. Therefore, the mounting member 70 is sandwiched from both sides in the first direction P by the holding member 50 and the fifth cover portion 40b. As a result, the state in which the mounting member 70 is mounted on the holding member 50 can be maintained.

Also, the mounting member 70 faces the mounting member 21 in the first direction P. As shown in FIG. That is, the mounting member 70 faces the end of the mounting member 21 in the first direction P. As shown in FIG. As a result, when the mounting member 21 is slidably mounted on the holding member 50, the mounting member 21 can be brought into contact with the mounting member 70, and the mounting member 21 can be stopped at the target position.

The mounting member 70 is made of resin, for example, and has elasticity. A pair of mounting members 70 is provided. One of the pair of mounting members 70 is arranged at the end of one side P1 in the first direction P of the holding member 50 and contacts the fourth cover portion 40a. The other of the pair of mounting members 70 is arranged at the end of the other side P2 in the first direction P and contacts the fifth cover portion 40b. As a result, the pair of mounting members 70 can hold the holding member 50 and the mounting member 21 from both sides in the first direction P. As shown in FIG.

The present embodiment has been described above with reference to the drawings (FIGS. 1 to 5). However, the present invention is not limited to the above-described embodiments, and can be implemented in various aspects without departing from the scope of the invention (for example, modified examples 1 to 6 shown below). Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, some components may be omitted from all components shown in the embodiments. In order to facilitate understanding, the drawings mainly show each component schematically, and the number of each component shown in the figure may differ from the actual number for convenience of drawing preparation. Also, each component shown in the above embodiment is an example and is not particularly limited, and various modifications are possible within a range that does not substantially deviate from the effects of the present invention.

<Modification 1>
FIG. 6 is a cross-sectional view showing Modification 1 of lighting device 1. As shown in FIG. In Modified Example 1, the third cover portion 80c is composed of the impermeable reflective member 82, and the first cover portion 80a and the second cover portion 80b are composed of the transmission diffusion member 83. FIG. Of the light emitted from the light source 22, the light L directed toward the third cover portion 80c is reflected by the inner surface of the third cover portion 80c. On the other hand, of the light emitted from the light source 22, the light L directed toward the first cover portion 80a and the second cover portion 80b is transmitted through the first cover portion 80a and the second cover portion 80b and diffused. Therefore, the luminaire 1 provides illumination with light distribution that is relatively bright on both sides in the second direction Q and relatively dark on the other side R2 in the third direction R.

For example, when the third base portion 11c is attached to the ceiling, the second direction Q is the lateral direction, and the third direction R is the vertical direction. The third cover portion 80c made up of the non-transmissive reflection member 82 reflects downward light upward from the third cover portion 80c, and the light reaches the ceiling surface. A washer light. Since the illuminance directly below can be reduced, it is possible to reduce glare for the user directly below the lighting fixture 1 . Therefore, the lighting fixture 1 according to Modification 2 is suitable for environments such as hospitals where users often look up at the ceiling.

<Modification 2>
FIG. 7 is a cross-sectional view showing Modification 2 of lighting device 1. As shown in FIG. In Modified Example 2, one side R1 of the first cover portion 80a in the third direction R is composed of the transmissive diffusion member 83, and the other side R2 of the first cover portion 80a in the third direction R is composed of the non-transmissive reflective member 82. It is One side R1 of the second cover portion 80b in the third direction R is composed of a transmissive diffusion member 83, and the other side R2 of the second cover portion 80b in the third direction R is composed of an impermeable reflective member . The third cover portion 80c is composed of an impermeable reflective member 82. As shown in FIG.

For example, when the third base portion 11c is attached to the ceiling, the second direction Q is the lateral direction, and the third direction R is the vertical direction. By switching between the non-transmissive reflective member 82 and the transmissive diffusion member 83 midway in the vertical direction, the glare cut angle can be adjusted. That is, since the glare cut angle differs depending on the position of the boundary between the non-transmissive reflective member 82 and the transmissive diffusion member 83 in the third direction R, an arbitrary glare cut angle can be set by adjusting the position of the boundary during optical design. can. Therefore, the luminaire 1 according to Modification 2 can reduce glare to surrounding users, and is suitable for various environments such as offices and stores.

<Modification 3>
FIG. 8 is a cross-sectional view showing Modified Example 3 of lighting device 1. As shown in FIG. In Modified Example 3, the first cover portion 80 a and the second cover portion 80 b are composed of the transmissive diffusion member 83 , and the second cover portion 80 b is composed of the non-transmissive reflective member 82 . An uneven portion 84 is formed on the inner surface of the second cover portion 80b. The uneven portion 84 has a substantially triangular cross section. A top side (ridgeline) of each convex shape of the uneven portion 84 extends along the first direction P. As shown in FIG. Since the outer surface of the second cover portion 80b is flat, the design of the lighting fixture 1 is not impaired.

In the lighting fixture 1 according to Modification 3, uneven portions 84 are formed on the inner surface of the portion of the light cover portion 80 that is formed by the non-transmissive reflective member 82 . The surface of the uneven portion 84 is a reflective surface, and the reflection direction of the light L can be changed by the shape and inclination of the reflective surface. That is, the uneven portion 84 functions as a light distribution control member. In Modified Example 3, since the light is reflected on the surface of the uneven portion 84, most of the light L directed toward the uneven portion 84 is directed toward the first cover portion 80a, and less light is directed toward the third cover portion 80c. As a result, the lighting fixture 1 is the brightest on one side Q1 in the second direction Q, the second brightest on the other side R2 in the third direction R, and the darkest on the other side Q2 in the second direction Q. Become. As a result, the illuminance directly below the lighting fixture 1 is reduced, and glare for the user directly below the lighting fixture 1 can be reduced.

<Modification 4>
FIG. 9 is a cross-sectional view showing Modified Example 4 of lighting device 1. As shown in FIG. In Modified Example 4, a concave portion 85 is formed on the inner surface of the second cover portion 80b made up of the non-transmissive reflective member 82 . The concave portion 85 is an example of a light distribution control member, like the concave/convex portion 84 of the third modification.

The number, position, cross-sectional shape, and the like of the concave portions, convex portions, or concave/convex portions formed on the inner surface of the portion composed of the non-transmissive reflective member 82 may be arbitrary. For example, in Modification 3, the cross-sectional shape of the concave-convex portion 84 is substantially equilateral triangular, but it may be wave-shaped or sawtooth-shaped. Moreover, the part where the recessed part, the protruded part, or the uneven part is formed is not limited to the inner surface of the second cover part 80b as long as it is the inner surface of the part formed by the non-transmissive reflective member 82 . For example, when the third cover portion 80c is composed of the impermeable reflective member 82, concave portions, convex portions, or uneven portions are formed on the inner surface of the third cover portion 80c.

<Modification 5>
The portion of the light cover portion 80 formed by the transmission diffusion member 83 may have different transmittance depending on the portion. FIG. 3 is used to describe Modification 5. FIG. For example, in the light cover portion 80 shown in FIG. 3, the transmittance of the transmission diffusion member 83 that constitutes the first cover portion 80a is relatively high, and the transmittance of the transmission diffusion member 83 that constitutes the third cover portion 80c is relatively high. is relatively low. In the case of this configuration, the illuminance directly below the lighting fixture 1 is low, and it is possible to reduce glare for the user directly below the lighting fixture 1 .

Further, for example, the transmission diffusion member 83 constituting the third cover portion 80c shown in FIG. 3 has the lowest transmittance on the other side Q2 in the second direction Q, and the transmittance gradually increases toward the one side Q1. It may be configured as follows. In this configuration, the brightness of the boundary portion between the second cover portion 80b composed of the impermeable reflective member 82 and the third cover portion 80c composed of the transmissive diffusion member 83 smoothly changes. In this manner, by changing the transmittance of each portion of the light cover portion 80 formed by the transmission diffusion member 83, the light distribution can be easily changed.

<Modification 6>
The fourth cover portion 40 a arranged at the end portion of the one side P<b>1 in the first direction P of the light cover portion 80 may be composed of the non-transmissive reflective member 82 or the transmissive diffusion member 83 . A part of the fourth cover portion 40 a may be composed of the non-transmissive reflective member 82 and the remaining part may be composed of the transmissive diffusion member 83 . In addition, concave portions, convex portions, or uneven portions may be formed on the inner surface of the portion of the fourth cover portion 40a formed by the non-transmissive reflective member 82 . In addition, the transmittance of the portion of the fourth cover portion 40a formed by the transmission diffusion member 83 may differ depending on the portion.

The fifth cover portion 40 b arranged at the end portion of the other side P<b>2 in the first direction P of the light cover portion 80 may be composed of the non-transmissive reflective member 82 or the transmissive diffusion member 83 . A part of the fifth cover portion 40 b may be composed of the non-transmissive reflective member 82 and the remaining part may be composed of the transmissive diffusion member 83 . In addition, concave portions, convex portions, or uneven portions may be formed on the inner surface of the portion of the fifth cover portion 40b formed by the non-transmissive reflective member 82 . In addition, the transmittance of the portion of the fifth cover portion 40b formed by the transmission diffusion member 83 may differ depending on the portion.

In addition to the first cover portion 80a, the second cover portion 80b, and the third cover portion 80c of the light cover portion 80, the fourth cover portion 40a and the fifth cover portion 40b are also formed by the impermeable reflective member 82 or the transmissive diffusion member 83. By configuring, variations in light distribution can be increased.

INDUSTRIAL APPLICABILITY The present invention provides a light source unit and a lighting fixture, and has industrial applicability.

1 lighting fixture 11 base member 11a first base portion 11b second base portion 11c third base portion 11d first end portion 11e second end portion 12 closing member 13 power supply portion 14 first opening 20 light emitting module 21 mounting member 22 light source 22a Light emitting surface 30 Cover member 40a Fourth cover part 40b Fifth cover part 50 Holding member 51 First holding part 51a First holding body 51b Second holding body 52 Second holding part 52a Third holding body 52b Fourth holding body 53 Mounting Surface 60 Mounting member 70 Mounting member 71 Body portion 72 First engaging portion 73 Second engaging portion 74 Contact portion 80 Light cover portion 80a First cover portion 80b Second cover portion 80c Third cover portion 80d Third end portion 80e Fourth end 81 Second opening 82 Non-transmissive reflective member 83 Transmissive diffusion member 84 Concave and convex portion 85 Concave portion 90 Entrance portion 91 First entrance body 92 Second entrance body C Interior D Interior F1 Space F2 Space L Light P First direction P1 One side P2 Other side Q Second direction Q1 One side Q2 Other side R Third direction R1 One side R2 Other side U1 Base unit U2 Light source unit

Claims (8)

a light source that emits light;
a light cover part covering the light source,
The light source unit, wherein the light cover portion includes an impermeable reflective member that reflects the light inside without transmitting the light, and a transmissive diffusion member that transmits and diffuses the light. The light cover section has a first cover section, a second cover section, and a third cover section,
the first cover part and the second cover part are opposed to each other with a gap therebetween,
2. The light source unit according to claim 1, wherein said third cover portion is interposed between said first cover portion and said second cover portion and faces a light emitting surface of said light source. 3. The method according to claim 2, wherein at least one of the first cover portion, the second cover portion, and the third cover portion is composed of the non-transmissive reflective member, and the rest are composed of the transmissive diffusion member. A light source unit as described. At least one of the first cover portion, the second cover portion, and the third cover portion is composed of both the non-transmissive reflective member and the transmissive diffusion member. A light source unit as described. 5. The light source unit according to any one of claims 1 to 4, wherein a concave portion, a convex portion, or an uneven portion is formed on the inner surface of the portion of the light cover portion formed of the non-transmissive reflective member. . 6. The light source unit according to any one of claims 1 to 5, wherein a portion of the light cover portion formed of the transmission diffusion member has a different transmittance depending on the portion. 7. The light source unit according to any one of claims 1 to 6, wherein the light cover portion is a two-color molded product of the impermeable reflective member and the transmissive diffusion member. A lighting fixture comprising the light source unit according to claim 1 .

Images