JP7239389B2 - lighting equipment - Google Patents

Description

The present invention relates to lighting fixtures.

BACKGROUND ART Conventionally, a lighting fixture (ceiling light) described in Patent Document 1 has been used. Patent Literature 1 discloses a thin and small sensor-equipped ceiling-mounted lighting fixture. This lighting fixture has a light source composed of an LED in the central portion of the front surface of the housing, and the light emitted from the light source is irradiated through a light source cover provided with a space on the front side.

The lighting fixture of Patent Literature 1 has a control unit in which a sensor, a sensor board, and a power supply board are collectively housed in a case. The control unit is arranged on the rear side of the housing, and attached so that the sensor is exposed on the front side through the sensor opening of the housing. A sensor cover is provided on the front side of the sensor, and the sensor cover fits into a circular window hole provided on the outer peripheral side of the light source cover. A sensor cylinder is provided between the sensor opening and the circular window, and is partitioned to reduce the influence of light from the light source.

JP 2017-135066 A

However, in the case of a structure like the lighting fixture of Patent Document 1, if a highly directional light source such as an LED element is used, the brightness of the central portion of the lighting fixture, which is directly below the irradiation direction, tends to be high, and the illumination light is emitted. Homogeneity is compromised. In addition, since the light emitted from the light source diffuses radially, if the sensor portion is provided so as to partition it as in the lighting fixture of Patent Document 1, part of the diffused light is blocked by the sensor portion and the sensor The outer peripheral side in the radial direction tends to be shadowed and darker than the part, and the irradiation light tends to be uneven. Therefore, there is a demand for a thin lighting fixture with a sensor unit that has an LED as a light source and that can suppress the generation of shadows on the sensor part and reduce the unevenness of the emitted light.

Therefore, the present invention has been made in view of the above problems, and in a thin lighting fixture with a sensor part having an LED as a light source, it is possible to suppress the generation of shadows in the sensor part and reduce the unevenness of the irradiation light. The purpose is to provide a lighting fixture that can

The problems to be solved by the present invention are as described above, and the means for solving the problems will now be described.

That is, the lighting fixture disclosed in the present application is
a light source unit having a plurality of LEDs;
a light source set section in which the light source section is arranged;
a device body in which the light source set portion is accommodated;
a light guide member that guides light emitted from the LED;
a sensor unit attached to the light source set unit,
A plurality of the LEDs are arranged facing each other in the vicinity of the outer peripheral edge of the light guide member,
The light guide member has an opening at a position corresponding to the sensor unit for exposing the sensor unit to the irradiation surface side of the lighting fixture,
Among the plurality of LEDs, the LED closest to the sensor unit has a line connecting the LED and the center of the light guide member that does not overlap the opening.

In the lighting fixture disclosed in the present application,
It is preferable that the opening has a substantially trapezoidal shape in a plan view, and is formed so that an intersection of lines obtained by extending opposing oblique sides thereof overlaps the irradiation surface of the light guide member in a plan view.

In the lighting fixture disclosed in the present application,
It is preferable that the sensor section has a stepped portion, and one end of the light source set portion is attached to the stepped portion.

Advantageous Effects of Invention According to the present invention, it is possible to provide a lighting fixture with a thin sensor unit that has an LED as a light source and that can suppress the generation of shadows in the sensor part and reduce unevenness in the emitted light.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view which shows the lighting fixture which concerns on one Embodiment of this invention. The top view which similarly shows a lighting fixture. FIG. 3 is a cross-sectional view along the line AA in FIG. 2; The exploded perspective view which similarly looked at the lighting fixture from diagonally upper direction. The exploded perspective view which similarly looked at the lighting fixture from the diagonally downward direction. The perspective view of the instrument main body which has arrange|positioned each member. FIG. 4 is an enlarged cross-sectional view showing light control by a light guide member; The perspective view which shows a sensor part (step part). The schematic diagram which shows the mode of a movement of the latching|locking part 22b at the time of attaching the fixture main body of the lighting fixture of this embodiment to an attachment member. The perspective view which shows the packing attached to the attachment member. Sectional drawing which shows the rib of packing. The perspective view which shows the lighting fixture which attached the fixture main body to the attachment member shown in FIG.

A lighting fixture 11 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 12. FIG. A lighting fixture 11 according to the present embodiment is a lighting fixture that uses an LED element 42 as a light source. The luminaire 11 can be used as a direct-mounted ceiling light that is directly attached to a mounting portion C such as a ceiling surface. It should be noted that the lighting device 11 is not limited to the ceiling surface, and can be attached to a wall surface (including an inclined surface) and used as a bracket light. In the following description, the side of the lighting fixture 11 that irradiates light is the irradiation surface side of the lighting fixture 11, and the side of the lighting fixture 11 facing the attached portion C is the mounting surface side of the lighting fixture 11 (opposite to the irradiation surface side). side). Further, the mounting surface side of the lighting fixture 11 is the rear side (rear side) of the lighting fixture 11 . In addition, when the lighting device 11 shown in FIG. , and the direction directly below the irradiation surface side of the lighting device 11 is defined as the downward direction. A direction perpendicular to the up-down direction of the lighting fixture 11 will be described as a side of the lighting fixture 11 . Also, in the following description, a state in which the lighting fixture 11 and the like are viewed from below is referred to as a plan view. A side view is a state in which the lighting fixture 11 and the like are viewed from a direction perpendicular to the vertical direction. A state in which the cross-sectional shape of the lighting equipment 11 and the like is viewed is referred to as a cross-sectional view.

The lighting fixture 11 includes a fixture main body 21, a power supply section 31, a light source section (LED module) 41, a light guide member 51, a first reflecting member 61, a second reflecting member 71, and a light source setting section. 81 , a mounting member 91 , a terminal block 100 and a sensor section 101 . The outer shape of the lighting fixture 11 is substantially circular in plan view, and the dimension in the height direction of the lighting fixture 11 (vertical direction of the lighting fixture 11 in FIG. 3) is the same as in the radial direction of the lighting fixture 11 (the lighting fixture in FIG. It has a substantially cylindrical shape that is thinner and flatter than the dimension in the direction perpendicular to the up-down direction of the instrument 11 .
In addition, the external shape of the lighting fixture 11 is not limited to this embodiment. The outer shape of the lighting device 11 can be, for example, an elliptical shape, a square shape, a rectangular shape, a polygonal shape, a fan shape, or a combination thereof, in addition to a substantially circular shape in plan view.

The fixture main body 21 holds the power source section 31 , the light source section (LED module) 41 , the light guide member 51 , the reflecting member 61 , the annular reflecting member 71 , the light source set section 81 , the terminal block 100 , the sensor section 101 and the mounting member 91 . It is a member attached to the The device main body 21 is a substantially cylindrical member having an opening on the lower side for exposing the light guide member 51 and an open upper end. The instrument body 21 has a cylindrical portion 22 and an annular inner edge portion 23 extending radially inward from the lower end portion of the cylindrical portion 22 . The instrument main body 21 is made of, for example, a metal material with high thermal conductivity. In this embodiment, as an example, the instrument body 21 is made of an aluminum alloy so that the heat generated from the power supply section 31 and the light source section 41 can be dissipated. The instrument main body 21 has a maximum inner diameter larger than the outer diameter of the attachment member 91 and can be attached to the irradiation surface side of the attachment member 91 . The instrument main body 21 includes a plurality of (three in this embodiment) positioning portions 22a having a rectangular shape in a side view and a convex shape on the inner peripheral surface of the cylindrical portion 22, and an upper end portion of the cylindrical portion 22 corresponding to each positioning portion 22a. A plurality of (three in this embodiment) locking portions 22b which are substantially rectangular in side view and convex and are provided at the lower end portion of the cylindrical portion 22 corresponding to each positioning portion 22a. and a plurality of (three in this embodiment) lower end protrusions 22c. The positioning portion 22a, the locking portion 22b, and the lower end convex portion 22c are formed on the inner peripheral surface of the cylindrical portion 22 at substantially equal intervals along the circumferential direction. The upper end portion of the positioning portion 22 a regulates the position of the lower end portion of the engaged portion 94 (guide portion 94 b ) of the mounting member 91 when the instrument body 21 is mounted on the mounting member 91 . The lower end portion of the positioning portion 22 a regulates the position of the upper end portion of the light source set portion 81 (light source portion 41 ) when the light source set portion 81 is attached to the fixture main body 21 . Thereby, the light source set portion 81 (light source portion 41 ) can be held at a predetermined position on the bottom portion of the instrument body 21 .

The inner edge portion 23 of the device main body 21 faces the outer peripheral edge portion of the light guide member 51 on the irradiation surface side. The inner edge portion 23 has a reflecting portion 23a that overlaps the radially inner edge portion of the LED element 42 in plan view. The reflecting portion 23 a is a portion that extends radially inward from the inner peripheral edge of the annular reflecting member 71 when the annular reflecting member 71 is assembled to the appliance main body 21 . Specifically, the reflecting portion 23 a has a reflecting surface on the mounting surface side, and is a portion that reflects the light emitted from the LED element 42 and transmitted through the light guide member 51 . In addition, since the reflecting part 23a is arranged so as to overlap at least a part of the LED element 42, the direct light emitted by the LED element 42 is blocked, so that the light emitted by the LED element 42 directly reaches the user's eyes. can be suppressed. As a result, it is possible to suppress unevenness of illumination light and to obtain illumination light with suppressed glare. The reflecting portion 23a is a portion that comes into contact with or is close to the outer peripheral edge of the light guide member 51 on the irradiation surface side when the light guide member 51 is assembled with the annular reflecting member 71 arranged inside the device main body 21 .
In the present embodiment, the reflecting portion 23a is configured as a member integrated with the inner edge portion 23, but the reflecting portion may be configured as a separate member and connected to the inner edge portion, for example.
In addition, if necessary, a groove may be provided in the circumferential direction of the reflecting portion 23a, and an annular packing may be arranged along the groove. The packing is for covering the gap between the fixture main body 21 (reflecting portion 23a) and the light guide member 51, and acts as a so-called airtight packing that prevents water droplets, dust, etc. from entering the interior of the lighting fixture 11. .

One of the positioning portions 22a is provided with a screw fixing portion 24 protruding radially inward from the surface of the positioning portion 22a. The screw fixing portion 24 is a portion for fastening together the screw mounting portion 33b of the power supply cover 33 and the cover mounting portion 84 of the light source set portion 81 with a mounting member such as a screw.

The inner peripheral surface of the cylindrical portion 22 is provided with two rows of ridges 22d, 22d arranged in parallel in the vertical direction. The protrusion 22d has a substantially triangular shape when viewed from above, and extends from the lower end of the cylindrical portion 22 to the vicinity of the upper end of the cylindrical portion 22 along the vertical direction. The protruding portion 22d is an engaged portion with which an elastic engaging portion 95 of the instrument body 21, which will be described later, is engaged when the instrument body 21 is attached to the mounting member 91. As shown in FIG.
In addition, in this embodiment, two rows of the protrusions 22d are provided, but one row or three or more rows may be provided.

The instrument main body 21 has a structure that can be attached to and detached from the mounting member 91 for cleaning the inside, replacing parts of the instrument main body 21, and the like.
Further, the material of the device main body 21 may be other than an aluminum alloy. For example, a material other than an aluminum alloy, such as a metal material other than an aluminum alloy, a resin, or the like, may be appropriately selected.

The power supply unit 31 is a power supply device for supplying power to the LED elements 42 of the light source unit 41 to light the LED elements 42 . The power supply unit 31 is arranged above (mounting surface side) the light source unit 41 in the instrument main body 21 . The power supply unit 31 has a power supply circuit unit 32 and a power supply cover 33 covering the power supply circuit unit 32 . The power supply circuit unit 32 has a rectangular parallelepiped case part 32a and a power supply circuit 32b arranged inside the case part 32a and having a plurality of electronic components mounted on a printed wiring board processed into a predetermined shape. . The power supply cover 33 is a metal plate-shaped member having a substantially semicircular shape in plan view. The power supply cover 33 is arranged so as to overlap the power supply circuit section 32 in plan view. The power supply cover 33 has a locking piece 33a and a screw attachment portion 33b having a screw hole on the arc-shaped outer peripheral edge side. The locking piece 33 a is locked to the cover locking portion 83 of the light source set portion 81 . The screw mounting portion 33b is fastened together with the screw fixing portion 24 of the fixture main body 21 via the cover mounting portion 84 of the light source set portion 81 with a mounting member such as a screw. The power supply unit 31 converts alternating current supplied from an external commercial power supply into a predetermined direct current, and supplies the converted current to a plurality of LED elements 42 mounted on a substrate 43 .

The power supply unit 31 is electrically connected to the terminal block 100 via wiring (not shown). For example, when the lighting fixture 11 is attached to the mounting portion C, the power supply portion 31 is electrically connected to the external commercial power supply by connecting a power cable (not shown) of an external commercial power supply on the back side of the ceiling to the terminal block 100. be done. The power supply unit 31 and the light source unit 41 are electrically connected by wiring 37 .
Although the terminal block 100 is used in this embodiment, it is not particularly limited. For example, instead of using the terminal block 100, it is also possible to use a connection part such as a connector.

The light source part 41 is a part that emits light toward the irradiation surface side of the lighting device 11 . The light source unit 41 is a light source module having a light emitting element as a light source. In this embodiment, an LED light source module in which a plurality of LED (light emitting diode) elements 42 as light sources are surface-mounted on a substrate 43 is used as the light emitting element. Specifically, the LED light source module is a module in which a plurality of LED elements 42 are arranged at substantially equal intervals in the circumferential direction on the surface of a substrate 43 processed into a substantially disk shape. The substrate 43 is provided with a cutout portion 45 having a substantially trapezoidal shape in a plan view corresponding to the sensor exposed portion 105 of the sensor portion 101 on the outer peripheral portion thereof. A plurality of LED elements 42 are mounted as an annular element array near the outer periphery of the substrate 43 (the portion excluding the notch 45) (see FIG. 2). The LED element 42 a closest to the notch 45 a is arranged so as to be closest to the sensor section 101 . The LED element 42 a closest to the sensor section is arranged so that the line connecting to the center E of the light guide member 51 does not overlap the notch 54 of the light guide member 51 . In this embodiment, the center E of the light guide member 51 is the center of the arc of the outer peripheral edge of the light guide member 51 excluding the notch 54 . The center E of the light guide member 51 can also be set from the outer shape of the light guide member 51 excluding the opening (notch) 54 . For example, in the case of a light guide member having an opening in a part of a polygonal shape in plan view, the center of gravity of a virtual outer shape having no opening can be used as the center of the light guide member. The light source section 41 has a feed element 44 on a substrate 43 . The feeding element 44 is arranged between two LED elements 42 among the plurality of LED elements 42 . As a result, there is no need to separately provide a space on the substrate 43 for arranging the feeding element 44, and the substrate 43 can be made compact. The light source unit 41 is arranged on the irradiation surface side of the light source set unit 81 . The plurality of LED elements 42 are arranged so as to face the vicinity of the outer peripheral end of the light guide member 51 on the mounting surface side. The LED light source module is electrically connected to the power supply section 31 via wiring 37 . Since the LED light source module is arranged with the back surface of the mounting surface of the substrate 43 in contact with the light source placement surface 82 of the light source set portion 81, when the LED light source module generates heat, the heat of the LED light source module is transferred to the light source set portion. It is transmitted to 81. The heat transmitted to the light source setting portion 81 is transmitted to the air around the mounting surface side of the light source setting portion 81 when the ambient temperature of the mounting surface side of the light source setting portion 81 is lower than the temperature of the light source setting portion 81 . Also, part of the heat transmitted to the light source set portion 81 is transmitted to the fixture body 21, and is transmitted to the air around the fixture body 21 when the ambient temperature of the fixture body 21 is lower than the temperature of the fixture body 21. As a result, the heat transmitted to the light source set portion 81 is dissipated to the surroundings of the light source set portion 81 and the fixture main body 21 .

In this embodiment, the surface-mounted LED element 42 is used as the light source, but the type of the light source is not limited to the LED element. It is possible.
Further, the substrate 43 may be attached to the light source placement surface 82 of the light source set portion 81 via a heat conductive sheet (not shown) or heat dissipation grease, thereby obtaining higher heat dissipation.

The light guide member 51 is attached to the instrument main body 21 so as to cover at least the irradiation surface side of the light source unit 41, reflects and diffuses the light emitted from the light source unit 41 (LED element 42), guides the light, and guides the light. It is a translucent member that controls the distribution of light emitted to the outside of the member 51 . In the light guide member 51 , at a position corresponding to the sensor exposed portion 105 of the sensor portion 101 on the outer peripheral edge, a substantially trapezoidal cutout in plan view for exposing the sensor exposed portion 105 on the irradiation surface side of the lighting device 11 is formed. A notch 54 is provided. The outer peripheral edge of the light guide member 51 (the portion excluding the notch 54) is arranged so as to overlap the plurality of LED elements 42 mounted in an arc shape in plan view. The light guide member 51 can guide the light emitted from the light source unit 41 (LED element 42) and emit the light to the outside of the light guide member 51 as surface light emission. The light guide member 51 is a substantially disk-shaped member. The light guide member 51 is made of a translucent resin material. The light guide member 51 is subjected to diffusion treatment. In the light guide member 51 of the present embodiment, a white (semi-translucent) silk-printed dot pattern is formed on the surface of the light guide member 51 exposed from the opening of the instrument body 21 by silk printing. The light guide member 51 is not limited to one having a dot pattern printed layer formed thereon. For example, the light guide member 51 has a printed layer other than the dot pattern formed thereon, or has a textured (frosted) surface having fine unevenness formed thereon. , a diffusing agent mixed therein, or a diffuse reflection sheet attached thereto. Further, a diffusion member may be separately provided on the irradiation surface side of the light guide member 51 . The light guide member 51 has a tapered portion 52 , a convex portion 53 that protrudes toward the irradiation surface, and a concave portion 55 on the opposite side of the convex portion 53 . The tapered portion 52 is a tapered portion whose diameter decreases downward from the outer peripheral edge portion of the light guide member 51 . The convex portion 53 is a portion that protrudes radially outward from the tapered portion 52 at a position corresponding to the feeding element 44 of the light source portion 41 in the tapered portion 52 . The convex portion 53 can be engaged with the notch portion 74 of the annular reflecting member 71 , and can position the light guiding member 51 when attaching the light guiding member 51 to the annular reflecting member 71 . The light guide member 51 has an outer diameter smaller than that of the annular reflecting member 71 and can be engaged with the tapered surface 73 of the annular reflecting member 71 . The concave portion 55 is formed at a position corresponding to the power feeding element 44 of the light source portion 41 so as to protrude toward the irradiation surface side. The concave portion 55 can engage with the power feeding element 44 when the light source portion 41 is arranged, and can position the light source portion 41 at an appropriate position in the light guide member 51 . The light guide member 51 also has a role of blocking the lower opening of the fixture body 21 to prevent dust from adhering to the LED element 42 .
Note that the cutout portion 45 of the light source portion 41, the cutout portion 54 of the light guide member 51, and the cutout portion 63 of the reflecting member 61, which are substantially trapezoidal in plan view and correspond to the sensor exposed portion 105 in this embodiment, are the openings. This is an example, and an opening such as a through hole other than the notch may be formed.

The reflecting member (first reflecting member) 61 is arranged at a position facing the light guide member 51 and is a member that reflects the light emitted from the LED element 42 . The reflecting member 61 is formed in a flat plate shape having a substantially circular shape in a plan view. The reflecting member 61 is placed on the mounting surface side of the light guide member 51 . The reflecting member 61 reflects the light emitted from the mounting surface side (back side) of the light guide member 51 toward the inside of the light guide member 51 . The reflecting member 61 reflects the light emitted from the LED element 42 and the light reflected by the inner wall surface of the light guide member 51 and emits the reflected light toward the irradiation surface. The reflecting member 61 is substantially disc-shaped and has a notch portion 62 and a notch portion 63 . The cutout portion 62 is a rectangular cutout portion in the outer peripheral edge of the reflecting member 61 . The notch portion 62 is a portion with which the power feeding element 44 of the light source portion 41 is engaged. The reflecting member 61 is arranged in a radially inner region of the plurality of LED elements 42 mounted in an annular shape on the irradiation surface side of the substrate 43 . In this embodiment, the reflective member 61 is arranged so that its outer peripheral edge is close to the plurality of LED elements 42 . As a result, the plurality of LED elements 42 are configured to allow light to enter inside from the outer peripheral edge portion of the light guide member 51 that is not covered with the reflecting member 61 .

The reflecting member 61 has a substantially trapezoidal cutout portion 63 corresponding to the sensor exposed portion 105 of the sensor portion 101 in the outer peripheral portion thereof. A peripheral portion of the notch portion 63 has a side reflecting portion 64 extending downward. The side reflection portion 64 is a portion that extends downward from the notch portion 63 of the light guide member 51 and reflects the light emitted from the light guide member 51 back into the light guide member 51 . The height dimension of the side reflecting portion 64 is substantially the same as the height dimension of the light guide member 51 . The side reflecting portion 64 can be easily arranged at an appropriate position within the instrument main body 21 along the end surface of the notch portion 54 of the light guide member 51 .

In the present embodiment, the reflecting member 61 is configured as a separate member from the substrate 43. Instead of the reflecting member 61, for example, a white sticker is attached to the irradiated surface side of the substrate 43. Alternatively, the reflecting portion can be formed by applying white paint or the like.

The annular reflecting member (second reflecting member) 71 is a reflecting member arranged outside the outer peripheral edge of the light guide member 51 and surrounding the outer peripheral edge. The annular reflecting member 71 is an annular member made of resin. The annular reflecting member 71 has an outer frame portion 72 , a tapered surface 73 , a notch portion 74 and a wiring arrangement portion 75 . The outer frame portion 72 is a substantially cylindrical portion. The tapered surface 73 is provided on the inner peripheral side of the annular reflecting member 71 and is an inclined surface whose diameter increases upward from the inner peripheral side edge. The tapered surface 73 is arranged below the LED element 42 . The tapered surface 73 is a reflecting surface that reflects light emitted from the tapered portion 52 of the light guide member 51 . The tapered portion 52 of the light guide member 51 is arranged in contact with the tapered surface 73 . The cutout portion 74 is a rectangular cutout portion of the tapered surface 73 and is a portion with which the convex portion 53 of the light guide member 51 is engaged. The height dimension of the annular reflecting member 71 is configured to be larger than the height dimension in the state where the reflecting member 61 is arranged on the upper surface of the light guide member 51 . The annular reflecting member 71 is a member that is first assembled to the lower end corner inside the fixture body 21 when the lighting fixture 11 is assembled. In a state in which the annular reflecting member 71 is assembled to the instrument main body 21, the tapered surface 73 and the reflecting portion 23a of the instrument main body 21 constitute a receiving portion corresponding to the shape of the outer peripheral edge portion of the light guide member 51. The light guide member 51 is fitted in. Thereby, the light guide member 51 can be easily positioned and arranged at an appropriate position.

The outer frame portion 72 has a wiring placement portion 75 that is a rectangular notch at a position corresponding to the wiring 37 extending from the power feeding element 44 of the light source portion 41 . The wiring placement section 75 is for placing the wiring 37 . By providing the wiring arrangement portion 75 , it becomes easy to extend the wiring 37 to the mounting surface side (back side) of the light source set portion 81 , thereby facilitating connection to the power supply portion 31 .

Further, in this embodiment, when the annular reflecting member 71, the light guide member 51, and the reflecting member 61 are assembled in order inside the instrument main body 21, the upper portion of the outer peripheral edge of the light guide member 51 is recessed in cross section and planarly viewed. An annular element accommodating portion S is formed. The element housing portion S accommodates a plurality of LED elements 42 as light sources. Furthermore, the annular reflecting member 71 covers the periphery of the side surface of the light guide member 51 , and the reflecting member 61 is arranged to cover the upper surface of the light guide member 51 excluding the element housing portion S. Furthermore, the reflecting portion 23 a of the instrument main body 21 covers a region radially inside the plurality of LED elements 42 on the irradiation surface side of the light guide member 51 . With this configuration, the light emitted from the LED elements 42 can be transmitted to the inside of the light guide member 51 without providing a distance (space) between the plurality of LED elements 42 as light sources and the light guide member 51 . of can lead. As a result, the height dimensions of the LED element 42, the light guide member 51, the reflection member 61, and the annular reflection member 71, which are the light sources, can be suppressed, and an increase in the height dimension of the lighting device 11 can be prevented. . In addition, according to such a configuration, the light emitted from the LED element 42 can enter the interior of the light guide member 51 only from the element housing portion S, which is the outer peripheral portion of the light guide member 51. Therefore, the incident light can be Light can be guided efficiently. Thus, according to the lighting fixture 11 of the present embodiment, it is possible to obtain illumination light with improved uniformity while being thin.

The light source set portion 81 is a substantially disk-shaped metal member. The light source set portion 81 has a light source placement surface 82 that faces the light source portion 41 over substantially the entire irradiation surface side and regulates the position of the light source portion 41 in the height direction. In the light source set portion 81, the light source portion 41 is arranged on the light source arrangement surface 82, and the power supply portion 31, the terminal block 100 and the sensor portion 101 are arranged on the mounting surface side. The light source mounting surface 82 is formed to have a flat surface in order to increase the contact area with the substrate 43 in order to conduct heat generated from the light source section 41 . The light source set portion 81 has a cover locking portion 83, a cover mounting portion 84, and a terminal block mounting portion 85 on the mounting surface side. The cover locking portion 83 is a portion where the locking piece 33a of the power supply cover 33 is locked. The cover mounting portion 84 is an upper surface portion of a portion erected in an L shape from the outer peripheral edge of the light source set portion 81, and has a screw hole. The terminal block mounting portion 85 is a portion to which the terminal block 100 is mounted.

The outer peripheral edge of the light source set portion 81 is composed of an outer arc portion 86 having a dimension substantially equal to the radial dimension of the inner peripheral surface of the cylindrical portion 22 of the fixture main body 21 and a smaller diameter than the outer arc portion 86. It has an inner circular arc portion 87 which is a notch formed so that the corresponding positioning portion 22a and the like can be inserted when it is housed inside the instrument main body 21 . When attaching the light source set portion 81 to which the light source portion 41 and the power supply portion 31 are attached to the instrument main body 21, the inner arc portion 87 is used to pass through the positioning portion 22a, and the light source set portion 81 is attached to the bottom portion of the instrument main body 21. After the placement, the outer arc portion 86 is rotated in one direction in the circumferential direction by a predetermined length, so that at least a portion of the outer arc portion 86 is placed between the positioning portion 22a and the lower end convex portion 22c. Then, the screw fixing portion 33b of the power supply cover 33 and the cover fixing portion 84 of the light source set portion 81 are aligned with the screw fixing portion 24 of the apparatus main body 21, and are fastened together with a fixing member such as a screw. As described above, in this embodiment, the light source set portion 81 having the light source portion 41 and the power supply portion 31 is positioned with respect to the fixture main body 21, and the light source set portion 81 is fixed to the fixture main body 21 only by fixing with one screw member. It can be held stably. As a result, the work for fixing with screw members is reduced, and the work for attaching the light source set portion 81 to the fixture main body 21 is facilitated.

The light source set portion 81 has a substantially trapezoidal cutout portion 88 corresponding to the sensor exposed portion 105 of the sensor portion 101 in the outer peripheral portion thereof. A sensor mounting portion 89 is provided on the radially inner edge portion of the notch portion 88 . The sensor mounting portion 89 is an upper surface portion of a portion erected in an L shape from the radially inner side edge portion of the notch portion 88, and has a screw hole. The sensor attachment portion 89 is a portion to which the screwing portion 108 of the sensor portion 101 is attached by an attachment member such as a screw. A pair of locking portions 90 to which the claw portions 107 of the sensor portion 101 are locked are provided in the vicinity of both ends of the notch portion 88 in the circumferential direction.

The mounting member 91 is a substantially disc-shaped member made of resin, which is attached in advance to the mounting portion C by a mounting member such as a screw (not shown) when the lighting device 11 is mounted to the mounting portion C. As shown in FIG. The attachment member 91 is also a support member that supports the instrument body 21 and is also called a stat. The mounting member 91 has a mounting plate 92, a peripheral wall portion 93, a locked portion 94, an elastic engaging portion 95, and the like.

The mounting plate 92 has a substantially disk shape, and is a portion that faces the mounting portion C when the mounting member 91 is mounted on the mounting portion C. As shown in FIG. The mounting plate 92 has a through hole 92a for inserting a power cable (not shown) of an external commercial power source.
The peripheral wall portion 93 is a substantially cylindrical portion extending downward from the outer peripheral edge of the mounting plate 92 .

The locked portions 94 are provided at a plurality of locations (three locations in this embodiment) in the circumferential direction of the peripheral wall portion 93 . The locked portion 94 has a notch portion 94a and a guide portion 94b adjacent to one circumferential end portion of the notch portion 94a. The notch portion 94a is a portion cut out in a rectangular shape in a side view of the peripheral wall portion 93 so that the length dimension in the circumferential direction is larger than the length dimension in the circumferential direction of the locking portion 22b of the device main body 21. formed. Accordingly, when attaching the instrument main body 21 to the mounting member 91, the instrument main body 21 can be positioned by engaging the locking portion 22b of the instrument main body 21 with the notch 94a. The guide portion 94b is a strip-shaped stepped portion arranged radially inward of the outer peripheral surface of the peripheral wall portion 93 . The guide portion 94b has a tapered surface 94c that inclines toward the attached portion C (upward) in the direction in which the instrument body 21 is rotated when the instrument body 21 is attached to the mounting member 91 . The tapered surface 94c is a curved surface. The guide portion 94b guides the locking portion 22b of the instrument body 21 to a predetermined height position (locking position) when the instrument body 21 is rotated in the circumferential direction to attach the instrument body 21 to the mounting member 91. is. By configuring the guide portion 94b in this way, the tip side (notch portion 94a side) of the tapered surface 94c is lower than the terminal end side. It is easy to lock when locking on the terminal side, and the locking portion 22b can be guided to a predetermined height position (locking position) simply by rotating the instrument body 21 (see FIG. 9A). Further, when the locking portion 22b is moved to a predetermined height position (locking position) by the guide portion 94b, the lower end portion of the guide portion 94b is positioned so as to ride on the upper end portion of the positioning portion 22a. The device main body 21 can be attached to the attachment member 91 without rattling (see FIG. 9B).
Note that the tapered surface 94c of the present embodiment is configured by a curved surface, but instead of the curved surface, for example, a flat surface or a curved surface having a curved portion in the middle may be used.

In addition, the guide portion 94b is chamfered at the tip adjacent to the notch portion 94a in the circumferential direction. This makes it possible to prevent the locking portion 22b of the instrument body 21 from colliding and getting caught when attaching the instrument body 21, as compared with the case where the tip is a corner.

The elastic engaging portion 95 has a spring portion 96 that is approximately U-shaped in plan view, and a spring holding portion 97 that holds the spring portion 96 . The elastic engaging portion 95 is held by the spring holding portion 97 so that the spring portion 96 exerts a pressing force radially outward. Although the details will be described later, the elastic engaging portion 95 can appear and retract according to the radially inward force applied when the radially outer tip portion of the spring portion 96 contacts the protrusion portion 22 d of the instrument main body 21 . It is configured.

As described above, the mounting member 91 is provided with the locked portion 94 for locking the locking portion 22b of the instrument main body 21 . When attaching the device main body 21 to the mounting member 91, the operator holds the device main body 21 by hand, inserts the locking portion 22b into the notch portion 94a of the locked portion 94, and holds the device main body in this state. 21 is rotated in one circumferential direction. During this rotation, the locking portion 22b is guided by the guiding portion 94b to the locking position (end position of the turning direction of the locking portion 22b), and the lower end portion of the guiding portion 94b is aligned with the upper end of the positioning portion 22a. ride up. At the same time, during this rotation, the elastic engaging portion 95 provided on the mounting member 91 moves in the circumferential direction while pressing against the inner peripheral surface of the instrument main body 21 . At this time, when the projecting portion 22d is reached, the tip of the spring portion 96 of the elastic engaging portion 95 (protruding portion of the spring portion 96) moves radially inward along one of the inclined surfaces. When the spring portion 96 is rotated further, the tip of the spring portion 96 returns to its original position due to the restoring force of the spring portion 96 when the spring portion 96 climbs over the top portion of the ridge portion 22d and reaches the other inclined surface, and the instrument main body 21 is restored. It serves as a rotation stopper that prevents rotation with respect to the mounting member 91 (in this embodiment, since two protrusions 22d are provided, this process is repeated twice). Therefore, it is possible to prevent the device main body 21 from unexpectedly coming off from the mounting member 91 due to vibration or the like. Further, when the instrument main body 21 is to be removed from the mounting member 91 , the instrument body 21 can be easily removed by rotating the instrument body 21 with respect to the mounting member 91 in the direction opposite to the above-described rotational direction. In addition, the ridge portion 22d is configured such that the other (rotation direction side when attaching) inclined surface is steeper than the one (rotation direction side when removing) inclined surface, so that the device main body 21 It is also possible to adopt a structure in which the spring portion 96 does not easily climb over the ridge portion 22d even when the is rotated in the removal direction.
By locking the locking portion 22 b to the locked portion 94 in this manner, the instrument main body 21 is attached to the mounting member 91 . Further, when the instrument main body 21 is rotated in the other circumferential direction while the instrument main body 21 is attached to the mounting member 91 , the locking portion 22 b of the instrument main body 21 is disengaged from the locked portion 94 of the mounting member 91 . , the instrument body 21 can be removed from the mounting member 91 .

As shown in FIG. 10 , a packing 98 can be attached to the attachment member 91 .
The packing 98 is a concave elastic member that is circular in plan view, and covers the mounting surface side of the mounting plate 92 of the mounting member 91 . The outer peripheral edge of the packing 98 has an annular portion 98a extending downward. The annular portion 98 a is a portion that covers the outer peripheral side of the upper end portion of the cylindrical portion 22 of the instrument main body 21 . The packing 98 is provided with openings corresponding to openings such as the through holes 92 a of the mounting member 91 and projections for alignment. When the lighting device 11 is attached to the attachment portion C, the packing 98 is pushed toward the attachment portion C by the fixture main body 21 and is compressed and deformed. Thereby, the gap between the mounting member 91 and the mounting portion C can be sealed. In addition, since the compression-deformed packing 98 is pushed in the direction away from the mounting portion C by the force of the packing 98 trying to return to its original shape, the lighting fixture 11 is less wobbly and has a stable posture when attached to the mounting portion C. do.

The packing 98 has a pair of substantially triangular projections in a side view near the central opening on the irradiation surface side, and a rib portion 99 near the outer periphery. The projections are inserted into through-holes opened at corresponding positions of the mounting plate 92 so that the packing 98 is brought into close contact with the mounting plate 92 and fixed.

As shown in FIG. 11, the rib portion 99 is a plurality of ribs R that are annular in plan view and have unevenness that continues along the radial direction. The rib R has a first inclined surface R1 whose diameter increases radially outward, and a second inclined surface R2 which is steeper than the first inclined surface R1. The plurality of ribs R have corners that are inclined radially outward. That is, the rib R is formed so that the outer peripheral side has a steep slope and the inner peripheral side has a gentler slope than the outer peripheral side. The plurality of ribs R abut on the upper end portion of the cylindrical portion 22 of the instrument body 21 when the instrument body 21 is attached to the mounting member 91 . As a result, the contact area with the upper end portion of the cylindrical portion 22 is increased compared to a flat surface without a plurality of ribs R, and the structure is such that water or the like is less likely to enter the interior of the lighting fixture 11 . Therefore, the lighting fixture 11 is suitable as an exterior lighting fixture that is easily affected by rain or the like.
Note that the packing 98 can be omitted depending on the application. 1 to 5 show the lighting device 11 with the packing 98 omitted.

A sensor unit 101 is a human sensor, an illuminance sensor, a remote control receiver, or the like. The sensor unit 101 of this embodiment is a pyroelectric human sensor. A human sensor is a sensor that detects a change in the amount of heat rays (infrared rays) radiated from a person or the like. The sensor unit 101 is provided with a lens group that introduces heat rays mainly emitted from humans or the like. Note that the sensor unit 101 is not limited to an infrared sensor, and may be an ultrasonic sensor, a radio wave sensor, or the like. The sensor unit 101 is electrically connected to the power supply unit 31 via wiring.

The sensor unit 101 is composed of a housing 102 and a sensor circuit 103 in which a sensor, a sensor operation unit, and the like are mounted.

The housing 102 is in the shape of a container having a substantially sectoral shape in a plan view and a predetermined height. The housing 102 has a sensor exposure portion 105 , a stepped portion 106 , a claw portion 107 and a screwing portion 108 .

The sensor exposure portion 105 is a portion where the sensor portion 101 is exposed on the irradiation surface side of the lighting fixture 11, and includes a sensor operation surface 105a having a substantially trapezoidal shape in plan view, a sensor light receiving portion 105b, and an operation switch which is a sensor operation portion. 105c and an operation knob 105d. The sensor light receiving portion 105b is a portion where the sensor mounted on the sensor circuit 103 receives infrared rays, and has a hemispherical shape and protrudes toward the irradiation surface side. The operation switch 105c and the operation knob 105d are sensor operation parts mounted on the sensor circuit 103, and protrude toward the irradiation surface through corresponding openings provided in the sensor operation surface 105a. The operation switch 105c is an operation setting switch for switching, for example, lighting time. The operation knob 105d is, for example, an illuminance adjustment knob for adjusting illuminance.

The sensor light receiving portion 105b is unevenly distributed at one end side of the sensor operating surface 105a in the circumferential direction. The operation switch 105c and the operation knob 105d are unevenly distributed on the other circumferential end side of the sensor operation surface 105a.

The stepped portion 106 is a stepped portion provided in the peripheral portion of the sensor exposed portion 105 excluding the outer peripheral edge side. The stepped portion 106 has a plurality of steps, and has a first stepped portion 106a from the top and a second stepped portion 106b which is a step provided below the first stepped portion 106a. The first step portion 106a is a portion where the notch portion 54 of the light guide member 51 and the notch portion 63 of the reflecting member 61 are positioned and arranged. The second step portion 106b is a portion where the light source set portion 81 is positioned and arranged.

The claw portions 107 are portions provided in the vicinity of both ends in the circumferential direction of the housing 102 and are locked by the locking portions 90 of the light source set portion 81 . The screw fixing portion 108 is a portion that is attached to the screw attachment portion of the light source set portion 81 with an attachment member such as a screw.

In the lighting device 11 of the present embodiment, a plurality of LED elements 42 are arranged facing each other in the vicinity of the outer peripheral end of the light guide member 51 . Further, as shown in FIG. 2, the light guide member 51 has a cutout portion 54 at a position corresponding to the sensor exposed portion 105 of the sensor portion 101, and the sensor exposed portion 105 is exposed through the cutout portion 54. exposing. Furthermore, the LED element 42a closest to the sensor section 101 among the plurality of LED elements 42 has a configuration in which the line connecting the LED element 42a and the center E of the light guide member 51 does not overlap the notch 54. .
As a result, in the LED element 42a closest to the sensor section 101, light is guided inward from the outer peripheral side of the light guide member 51 from the LED element 42a. can be suppressed to reduce unevenness of the illumination light. As a result, the uniformity of surface emission of the light guide member 51 can be improved.

Further, as shown in FIG. 2, in the lighting fixture 11 of the present embodiment, the cutout portion 54 of the light guide member 51 has a substantially trapezoidal shape in a plan view, and the intersection point P overlaps the irradiated surface of the light guide member 51 (the portion excluding the notch 54) in a plan view.
By forming the notch portion 54 to have such a shape, light from the LED element 42 a closest to the sensor portion 101 located near the outer periphery of the light guide member 51 is less likely to be blocked.

Further, in the lighting fixture 11 of the present embodiment, the sensor section 101 has the stepped portion 106 , and the notch portion 88 that is one end of the light source set portion 81 is assembled to the first stepped portion 106 a of the stepped portion 106 .
Thereby, the positions of the light source set portion 81 (light source portion 41) and the sensor portion 101 can be properly positioned.

Further, the lighting fixture 11 of the present embodiment has a sensor light receiving portion 105b, an operation switch 105c and an operation knob 105d, which are sensor operation portions, which are exposed on the irradiation surface side of the lighting fixture 11, and are attached to the light source set portion 81. The sensor light receiving portion 105b is adjacent to the operation switch 105c and the operation knob 105d, which are sensor operation portions, and is unevenly distributed on one side of the sensor exposure surface 105 of the sensor portion 101.
According to such a configuration, by exposing the operation switch 105c and the operation knob 105d, which are the sensor operation portions, to the irradiation surface side of the lighting fixture 11, even after the lighting fixture 11 is attached to the mounting portion C, the sensor can be detected. Visibility of the operation part is good and it is easy to adjust. Furthermore, for example, compared to the conventional case where the sensor light receiving portion 105b is arranged in the center of the sensor exposed portion 105, and the operation switch 105c and the operation knob 105d are arranged so as to face each other so as to sandwich the sensor light receiving portion 105b. , the space for operating the operation switch 105c and the operation knob 105d can be secured, and the sensor operation surface 105a can be made small. Since the sensor operation surface 105a is made small, a wide irradiation surface of the light guide member 51 can be ensured.

Further, in the lighting fixture 11 of the present embodiment, a plurality of the LED elements 42 are arranged facing each other near the outer peripheral edge of the light guide member 51, and the sensor section 101 is formed by notching at least the vicinity of the outer peripheral edge of the light guide member 51. It is exposed on the irradiation surface side of the lighting fixture 11 in the region. As a result, since the area occupied by the outer peripheral portion of the sensor section 101 is narrowed, it becomes possible to secure a space for arranging the LED elements 42, and the number of the LED elements 42 to be mounted on the substrate 43 can be increased. . This makes it possible to improve the illuminance of the lighting device 11 .

In addition, in the lighting device 11 of the present embodiment, the sensor light receiving portion 105b of the sensor portion 101 is unevenly distributed in the sensor exposure portion 105 on the side in which the fixture body 21 is rotated when attached (the arrow F direction side in FIG. 2). there is As a result, when the sensor operation portion (the operation switch 105c and the operation knob 105d) is operated with the lighting device 11 attached to the attachment portion C, the sensor operation portion is less likely to be shadowed by the sensor light receiving portion 105b. easy for people to see.

REFERENCE SIGNS LIST 11 luminaire 21 fixture main body 31 power supply unit 41 light source unit 42 LED element 42a LED element closest to sensor unit 51 light guide member 54 notch (opening)
61 reflecting member (first reflecting member)
81 Light source set part 91 Mounting member 101 Sensor part 105 Sensor exposed part C Attached part E Center of light guide member F Arrow indicating direction of rotation when fixture body is attached

Claims (3)

a light source unit having a plurality of LEDs;
a light source set section in which the light source section is arranged;
a device body in which the light source set portion is accommodated;
a light guide member that guides light emitted from the LED;
a sensor unit attached to the light source set unit,
A plurality of the LEDs are arranged facing each other in the vicinity of the outer peripheral edge of the light guide member,
The light guide member has an opening at a position corresponding to the sensor unit for exposing the sensor unit to the irradiation surface side of the lighting fixture,
The lighting fixture, wherein a line connecting the LED closest to the sensor unit among the plurality of LEDs and the center of the light guide member does not overlap the opening. 2. The opening according to claim 1, wherein said opening has a substantially trapezoidal shape in a plan view, and is formed such that an intersection of lines obtained by extending opposing oblique sides thereof overlaps an irradiation surface of the light guide member in plan view. lighting equipment. The lighting fixture according to claim 1 or 2, wherein the sensor section has a stepped section, and one end of the light source set section is assembled to the stepped section.

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