JP6996194B2 - Lighting equipment - Google Patents

Description

Embodiments of the present invention relate to a lighting device.

Conventionally, a light source unit having a light emitting module can be attached to and detached from a main body unit installed on a ceiling or the like, and a power supply unit and a light source unit arranged on the ceiling or the main body unit are lit to supply power. Lighting devices that are connected by cords are known.

When used as a downlight, for example, such a lighting device includes a reflector that reflects light from a light source unit downward. The reflector is provided, for example, on the inner peripheral surface of the opening of the main body unit, below the light source unit.

JP-A-2017-54748

However, the light emitted from the light source unit may leak from the side surface side or the upper surface side. That is, there is room for further improvement in the lighting device in improving the light extraction efficiency.

An object to be solved by the present invention is to provide a lighting device capable of improving the light extraction efficiency.

The lighting device according to an example of the embodiment includes a light source unit, a main body unit, a first reflecting member, and a second reflecting member. The light source unit has a light source body. The light source unit is detachably attached to the main body unit. The first reflecting member is provided in the main body unit, is arranged on the irradiation direction side with respect to the light source body, and reflects the light from the light source body toward the irradiation direction. The second reflecting member is provided in the main body unit so that a space is formed between the second reflecting member and the light source unit and is arranged closer to the light source unit than the first reflecting member, and the second reflecting member is provided at least in the irradiation direction. It is arranged on the side of the light source body different from the above, and the light from the light source body is reflected toward the irradiation direction. The main body unit further includes a first frame body and a second frame body. The first frame is formed in a substantially cylindrical shape. The second frame is formed so that one end side is connected to the first frame body and the diameter is substantially expanded toward the other end side. The light source unit is attached to the first frame body side with respect to the second frame body, and the first reflection member is provided along the inner peripheral surface of the second frame body, and the second frame body is provided. The reflective member is provided along the inner peripheral surface of the first frame body so as to surround at least the side of the light source body.

According to the present invention, it can be expected that the light extraction efficiency will be improved.

FIG. 1 is an upward perspective view of the lighting device according to the embodiment. FIG. 2 is a downward perspective view of the lighting device according to the embodiment. FIG. 3 is a side view of the lighting device according to the embodiment. FIG. 4 is an exploded perspective view of the frame body, the second reflector, and the fixing member. FIG. 5 is a perspective view showing a state in which the second reflector and the fixing member are attached to the frame body. FIG. 6 is a schematic cross-sectional view of the lighting device according to the embodiment when viewed in cross section on a YZ plane. FIG. 7 is an enlarged view of the M1 portion shown in FIG.

The lighting device 10 according to the embodiment described below includes a light source unit 12, a main body unit 11, a first reflector 11b (corresponding to an example of the “first reflector”), and a second reflector 11d (“1st reflector”). Corresponds to an example of the "second reflective member"). The light source unit 12 has a light source body 20. A light source unit 12 is attached to the main body unit 11. The first reflector 11b is provided on the main body unit 11 and is arranged on the light source body 20 on the predetermined irradiation direction side to reflect the light from the light source body 20 toward the irradiation direction. The second reflector 11d is provided on the main body unit 11 and is arranged at least on the side of the light source body 20 different from the irradiation direction, and reflects the light from the light source body 20 toward the irradiation direction.

The main body unit 11 according to the embodiment described below corresponds to the first frame portion 111 (corresponding to an example of the "first frame body") and the second frame portion 112 (corresponding to an example of the "second frame body"). ) And further. The first frame portion 111 is formed in a substantially cylindrical shape. The second frame portion 112 is formed so that one end side is connected to the first frame portion 111 and the diameter is substantially expanded toward the other end side. The light source unit 12 is attached to the side of the first frame portion 111 with respect to the second frame portion 112. The first reflector 11b is provided along the inner peripheral surface of the second frame portion 112. The second reflector 11d is provided along the inner peripheral surface of the first frame portion 111 so as to surround at least the side of the light source body 20.

In the second reflector 11d according to the embodiment described below, the opening diameter of the opening formed by the second reflector 11d is smaller than the opening diameter of the opening formed by the first reflector 11b.

The second reflector 11d according to the embodiment described below has an opening formed by the other end side with respect to the one end side rather than the opening diameter of the opening formed by the one end side closer to the first reflector 11b. The opening diameter of the part is smaller.

Hereinafter, the lighting device 10 according to the embodiment will be described with reference to the drawings. In the embodiment, the same parts are designated by the same reference numerals, and duplicate description is omitted.

First, an example of a basic configuration of the lighting device 10 according to the embodiment will be described with reference to FIGS. 1 to 3. FIG. 1 is an upward perspective view of the lighting device 10 according to the embodiment. Further, FIG. 2 is a downward perspective view of the lighting device 10 according to the embodiment. Further, FIG. 3 is a side view of the lighting device 10 according to the embodiment.

As shown in FIGS. 1 to 3, the lighting device 10 is a motion sensor 14 (see FIG. 2) embedded and installed in a circular embedded hole formed in a ceiling member 100 (see FIG. 3) such as a ceiling plate. ) Is a downlight. In this embodiment, the positive direction side of the Z axis in the figure is the upper side, and the negative direction side is the lower side.

The lighting device 10 includes a main body unit 11, a light source unit 12, a power supply unit 13, and a motion sensor 14. The main body unit 11 is a main body portion of the lighting device 10, and is a portion embedded and installed in the above-mentioned embedded hole.

The main body unit 11 has a first frame portion 111 formed in a substantially cylindrical shape, and a second frame formed in a shape in which the diameter is substantially increased toward the lower side while being connected to the lower side of the first frame portion 111. A frame body 11a composed of a portion 112 is provided.

A first reflector 11b is provided on the inner peripheral surface of the second frame portion 112 along the inner peripheral surface. The first reflector 11b reflects the light emitted from the light source unit 12 downward.

The light source unit 12 is, for example, detachably provided on the main body unit 11. The light source unit 12 includes a light emitting module 12a (see FIG. 6), a heat radiating body 12b in which the light emitting module 12a is arranged on the lower surface side, a transmissive cover 12c arranged on the lower surface side of the light emitting body 12b, and light emitting. It includes a connecting member 12d (see FIG. 6) that connects the radiator body 12b and the cover 12c while accommodating the module 12a. In the following, in the light source unit 12, each member other than the heat radiating body 12b arranged on the lower surface side of the heat radiating body 12b, that is, the light emitting module 12a, the cover 12c, the connecting member 12d, and the like are collectively referred to as the "light source body 20" ( (See FIG. 6).

The light source unit 12 irradiates the light emitted by the light source body 20 downward from the opening of the second frame portion 112. The above-mentioned first reflector 11b is provided below the light source body 20, and mainly reflects the light emitted through the cover 12c downward.

Further, in the light source unit 12, the upper side including the heat radiating body 12b and the like is exposed from the upper side of the first frame portion 111. As a result, it is possible to prevent the heat dissipated from the light source unit 12 from being trapped in the main body unit 11 and reduce the number of parts required for cooling. The light source unit 12 is held by the holder 11c so as to be detachable from the main body unit 11, for example.

The power supply unit 13 is provided close to the main body unit 11 and supplies power to the light source unit 12. The power supply unit 13 is fixed to the holder 11c, for example, and is arranged so as to project laterally from the main body unit 11.

The power supply unit 13 includes a power supply unit 13a, a sensor unit 13b, a terminal block 13c, and a top plate 13d as a mounting plate for mounting the power supply unit 13a, the sensor unit 13b, and the terminal block 13c.

The power supply unit 13a has a power supply board (not shown) on which a power supply circuit is mounted. The power supply circuit of the power supply board inputs a commercial AC power supply, converts it into a predetermined DC power supply, and outputs it to the light source unit 12.

The power supply unit 13a is attached to the lower surface side of the top plate 13d, and the terminal block 13c is provided on the input side of the power supply board described above and is electrically connected. Further, the power supply unit 13a is pulled out from the output side of the power supply board with a cord (not shown) for supplying power to the light source unit 12, and is electrically connected to the light source unit 12 via such a cord.

The sensor unit 13b is also attached to the lower surface side of the top plate 13d. The sensor unit 13b is a control unit of the motion sensor 14. The sensor unit 13b is communicably connected to the motion sensor 14 and the power supply unit 13a, and causes the power supply unit 13a to control the power supply to the light source unit 12 based on the detection result of the motion sensor 14.

That is, when the motion sensor 14 detects the human body, the sensor unit 13b causes the power supply unit 13a to supply power to the light source unit 12. Further, while the motion sensor 14 does not detect the human body, the sensor unit 13b does not allow the power supply unit 13a to supply power to the light source unit 12.

The top plate 13d is formed of, for example, a metal plate having a substantially U-shaped cross section, and a power supply unit 13a, a sensor unit 13b, a terminal block 13c, and the like are attached to the lower surface side.

By the way, as already described, the above-mentioned first reflector 11b is provided below the light source body 20, and mainly reflects the light emitted through the cover 12c downward. However, the light emitted from the light emitting module 12a is transmitted to the side or the upper side of the light source body 20, for example, due to a gap created by a tolerance of the members constituting the light source body 20, or the like, to the side or the upper side of the light source body 20. It may leak out.

Therefore, in the lighting device 10 according to the present embodiment, in addition to the first reflector 11b, a second reflector 11d arranged above the first reflector 11b so as to further cover the periphery of the light source body 20 is provided. I decided to provide it.

The configuration of the lighting device 10 according to the present embodiment to which the second reflector 11d is added will be specifically described with reference to FIGS. 4 to 7. FIG. 4 is an exploded perspective view of the frame body 11a, the second reflector 11d, and the fixing member 11e. Further, FIG. 5 is a perspective view showing a state in which the second reflector 11d and the fixing member 11e are attached to the frame body 11a. Further, FIG. 6 is a schematic cross-sectional view of the lighting device 10 according to the embodiment when viewed in cross section in a YZ plane. Note that FIG. 6 omits the illustration of the power supply unit 13. Further, FIG. 7 is an enlarged view of the M1 portion shown in FIG.

As shown in FIG. 4, the lighting device 10 according to the embodiment further includes a second reflector 11d. The second reflector 11d is provided as a substantially annular member having a top plate portion 113 and a peripheral wall portion 114. Therefore, as shown in FIG. 6, the second reflector 11d has an opening diameter D1 of the opening formed by the top plate portion 113 and an opening diameter D2 of the opening formed by the peripheral wall portion 114. D1 is smaller.

Returning to the description of FIG. Further, the second reflector 11d has a flange portion 115 cut out in places along the outer periphery of the lower end portion of the peripheral wall portion 114. A boss portion 116 or the like for fixing a member is formed on the inner peripheral surface of the first frame portion 111 of the frame body 11a, and the flange portion 115 is a first frame portion in which such a boss portion 116 or the like is present. It is notched according to the shape of the inner peripheral surface of 111.

Further, a bottom plate portion 117 is formed along the inner circumference at the lower end portion of the inner peripheral surface of the first frame portion 111. The second reflector 11d is inserted from above with respect to the frame body 11a having such a configuration, and is held in a state where the flange portion 115 is in contact with the bottom plate portion 117.

Then, the second reflector 11d is further fixed by a substantially annular fixing member 11e inserted from above with respect to the frame body 11a. The fixing member 11e fixes the second reflector 11d by fixing the plurality of pressing tools 118 to the boss portion 116 by a fastening member or the like.

As shown in FIG. 5, when the second reflector 11d and the fixing member 11e are attached to the frame body 11a, the pressing tool 118 hides the boss portion 116 from, for example, in the vertical direction. be able to. Thereby, for example, when a person looks at the lighting device 10 from below with the lighting device 10 attached to the ceiling member 100, it is possible to prevent the boss portion 116 from being visible and spoiling the aesthetic appearance.

With such a configuration, as shown in FIG. 6, the lighting device 10 according to the embodiment is only a first reflector 11b provided along the inner peripheral surface of the second frame portion 112 below the light source body 20. Instead, it has at least a second reflector 11d provided along the inner peripheral surface of the first frame portion 111 so as to surround the side of the light source body 20.

As shown in FIG. 7, the second reflector 11d can reflect the light upward from the light source body 20 downward by the top plate portion 113 (see arrow 701 in the figure). Further, the second reflector 11d can reflect the light laterally from the light source body 20 downward by the peripheral wall portion 114 (see the arrow 702 in the figure). This makes it possible to improve the light extraction efficiency in the desired light irradiation direction (here, downward) (see arrow 703 in the figure).

Further, as shown in FIG. 7, since the second reflector 11d has the top plate portion 113, the upper surface side of the top plate portion 113 is easily pressed and fixed by the fixing member 11e and the holding tool 118. 2 Reflectors 11d can be arranged. Further, the top plate portion 113 can prevent the boss portion 116 and the holding tool 118 formed on the inner peripheral surface of the first frame portion 111 from being seen from below and spoiling the aesthetic appearance.

Further, as shown in FIG. 6, the opening diameter D1 on the upper end side of the second reflector 11d is smaller than the opening diameter D2 on the lower end side of the second reflector 11d. Further, the opening diameter D2 on the lower end side of the second reflector 11d is smaller than the opening diameter D3 on the upper end side of the first reflector 11b. Further, the opening diameter D3 on the upper end side of the first reflector 11b is smaller than the opening diameter D4 on the lower end side of the first reflector 11b.

While having the relationship of the opening diameters D1 to D4, the lower end portion of the second reflector 11d and the upper end portion of the first reflector 11b are in contact with each other without a gap by the flange portion 115 of the second reflector 11d. Can be done. As a result, it is possible to improve the light extraction efficiency when the light emitted by the light source body 20 is directed downward, and when a person looks at the lighting device 10 from below, at least from the lower end portion of the first reflector 11b. It is possible to prevent the internal structure from being visible from the upper end portion (lower surface of the top plate portion 113) of the second reflector 11d.

As described above, the lighting device 10 according to the embodiment includes a light source unit 12, a main body unit 11, a first reflector 11b (corresponding to an example of the "first reflector"), and a second reflector 11d. (Corresponding to an example of the "second reflective member"). The light source unit 12 has a light source body 20. A light source unit 12 is attached to the main body unit 11. The first reflector 11b is provided on the main body unit 11 and is arranged on the light source body 20 on the predetermined irradiation direction side to reflect the light from the light source body 20 toward the irradiation direction. The second reflector 11d is provided on the main body unit 11 and is arranged at least on the side of the light source body 20 different from the irradiation direction, and reflects the light from the light source body 20 toward the irradiation direction.

This can be expected to improve the light extraction efficiency.

In the above-described embodiment, the case where the lighting device 10 is equipped with the motion sensor 14 is taken as an example, but the case where the lighting device 10 is not equipped with the motion sensor 14 may be used.

Further, in the above-described embodiment, the case where the lighting device 10 is a downlight is taken as an example, but in addition to the main first reflector 11b, at least the second reflection provided so as to surround the side of the light source body 20. The form is not limited to the downlight as long as the plate 11d can be added.

Although embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. This embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. This embodiment and its modifications are included in the scope and gist of the invention as well as the invention described in the claims and the equivalent scope thereof.

10 Lighting device 11 Main unit 11a Frame 11b 1st reflector 11c Holder 11d 2nd reflector 11e Fixing member 12 Light source unit 12a Light emitting module 12b Radiator 12c Cover 12d Connecting member 13 Power supply unit 13a Power supply unit 13b Sensor unit 13c Terminal stand 13d Top plate 14 Human sensor 20 Light source 100 Ceiling member 111 1st frame part 112 2nd frame part 113 Top plate part 114 Peripheral wall part 115 Flange part 116 Boss part 117 Bottom plate part 118 Presser

Claims (3)

With a light source unit having a light source body;
With the main body unit to which the light source unit can be attached and detached;
With a first reflecting member provided in the main body unit, which is arranged on a predetermined irradiation direction side with respect to the light source body and reflects light from the light source body toward the irradiation direction;
A space is formed between the light source unit and the main body unit so as to be arranged closer to the light source unit than the first reflecting member, and at least the side of the light source body different from the irradiation direction. With a second reflective member arranged in the direction and reflecting the light from the light source body toward the irradiation direction;
Equipped with
The main body unit
With the first frame formed in a substantially cylindrical shape;
With the second frame body formed in a shape in which one end side is connected to the first frame body and the diameter is substantially expanded toward the other end side;
Further equipped,
The light source unit is
Attached to the first frame body side with respect to the second frame body,
The first reflective member is
Provided along the inner peripheral surface of the second frame body,
The second reflective member is
A lighting device provided along the inner peripheral surface of the first frame body so as to surround at least a side surface of the light source body . The second reflective member is
Of the openings formed by the second reflective member, the opening diameter of the opening formed by one end side closer to the first reflective member is the opening formed by the first reflective member. The lighting device according to claim 1 , which is smaller than the opening diameter of the above. The second reflective member is
Claim 1 or 2 in which the opening diameter of the opening formed by the other end side with respect to the one end side is smaller than the opening diameter of the opening formed by the one end side closer to the first reflective member. The lighting device described in.

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