JP6512315B2 - lighting equipment - Google Patents

Description

  The embodiment of the present invention relates to a luminaire that can improve the heat dissipation of the light emitting element using a light emitting element such as an LED as a light source.

  There are street lights using light emitting elements such as LEDs.

JP 2007-188685 A

  As described above, when the LED is used as the light emitting element, heat may flow inside the case of the street lamp, and there is a need for improvement of heat dissipation.

  The luminaire according to the embodiment includes a box-shaped metal fixture body having a bottom with an opening on one side; and a plurality of plate-like members integrally formed with the fixture body so as to protrude from the inner surface of the fixture body. A plurality of light emitting elements mounted thereon, and a first substrate thermally connected to the plurality of protrusions; and the device spaced apart from the opening relative to the first substrate. A second substrate on which the circuit component for lighting the plurality of light emitting elements fixed in the main body is mounted, and: a cover made of a translucent resin and attached to the device body I assume.

  According to the present invention, improvement in heat dissipation can be expected.

It is the perspective view which showed the lower surface side upwards with the lighting fixture which concerns on embodiment of this invention. It is a perspective view which disassembles and shows the lighting fixture shown in FIG. It is the top view which sees through the lighting fixture shown in FIG. 1 from the upper part, and showed the inside. It is sectional drawing along F4-F4 line of the lighting fixture shown in FIG. It is sectional drawing which showed typically the thermal radiation path | route of the lighting fixture shown in FIG. It is a perspective view which decomposes | disassembles and shows the 2nd board | substrate and partition plate of the lighting fixture shown in FIG.

  A lighting apparatus according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6. The lighting fixture (lighting device) of the present embodiment is a so-called street lamp (security lamp) mainly used outdoors.

  As shown in FIG. 1 to FIG. 4, the lighting fixture 11 is provided continuously with the main body (the fixture main body) 12 and the covers 13, 12 and a mounting part 16 for mounting the 12 to an outdoor pillar or the like Prepare. Furthermore, the luminaire 11 supports the first substrate 17, the second substrate 18, and the second substrate 18 provided in the 12 internal spaces 14 at a position separated from the main body (the appliance main body) 12. And a lens 23 provided in close contact with the back surface (the other surface 31 B) of the first substrate 17. Furthermore, the lighting apparatus 11 includes a ring-shaped packing 24 interposed between the main body 12 and the cover 13, a sensor (illuminance sensor) 25 for sensing light from the outside, and a sensor cover 26 covering the sensor 25. And a capacitor 42 for preventing the noise of the sensor 25.

  The first substrate (printed circuit board) 17 has a substrate main body 31 having one surface 31A and the other surface 31B opposite thereto, and a plurality of light emitting elements mounted on one surface 31A of the substrate main body 31 And 32. Each of the light emitting elements 32 is, for example, an LED. Moreover, as the light emitting element 32, solid light emitting elements, such as an organic EL element, etc. are applicable. The calorific value of the first substrate 17 accounts for approximately 80% to 90% of the calorific value of the entire lighting device 11.

  The second substrate (printed circuit board) 18 includes a plurality of circuit components 33 and a circuit for lighting the plurality of light emitting elements 32. As shown in FIG. 4, the second substrate 18 is supported at a position (floating position) separated from the main body 12 by the support 21. The second substrate 18 is supported at a position separated from a partition plate 36 described later. The second substrate 18 is connected to an external power supply 12. The second substrate 18 is connected to the sensor 25. When light from the outside is sensed in the daytime through the sensor 25 (for example, when the illuminance of the outside is equal to or higher than a threshold), the light emitting element Turn off 32. In addition, the second substrate 18 turns on the light emitting element 32 at night (for example, when the illuminance of the external world is lower than a threshold value) at which the sensor 25 can not detect external light. The calorific value of the second substrate 18 accounts for approximately 10% to 20% of the calorific value of the entire luminaire 11.

  As shown in FIG. 2 and FIG. 4, the heat sink 22 is formed of a metal, for example, iron, in an oblong plate shape. The heat sink 22 is thermally connected to the main body 12 via a rib 34 and an edge 39 described later. As shown in FIG. 2, the lens 23 is integrally formed in a rectangular plate shape by a translucent resin material. As shown in FIG. 4 etc., the lens 23 has a plurality of recesses 23A and a plurality of projections 23B at positions corresponding to the light emitting elements 32, and guides the light from the light emitting elements 32 to a desired angle. , Light distribution of the lighting fixture 11 is controlled.

  As shown in FIG. 4 etc., the main body 12 is formed in a stepped box shape by a metal, for example, an aluminum die cast. As shown in FIG. 6, the main body 12 has a plurality of ribs 34 on the both side surfaces thereof at positions corresponding to first portions 14 </ b> A of the internal space 14 described later. As shown in FIGS. 4 and 6, each of the plurality of ribs 34 is provided so as to project from the inner surface of the main body 12 and is in contact with one surface of the heat sink 22. The main body part 12 suppresses the extreme weight increase of the main body part 12 while securing good thermal conductivity by increasing the contact area with the heat sink 22 by the rib 34. As shown in FIG. 4, the first substrate 17 is thermally connected to 12 via the heat sink 22 and the ribs 34.

  As shown in FIG. 1 and FIG. 2, the cover 13 is formed in a hemispherical shape by a translucent resin material. The cover 13 is fixed to the main body 12 by a fixing member such as a screw 35 or the like. As shown in FIG. 4, the internal space 14 includes a first portion 14A provided with a first substrate 17 and a heat sink 22 and a second portion 14B provided with a second substrate 18. It is.

  The support portion 21 includes a partition plate 36 which divides the internal space 14 into a first portion 14A and a second portion 14B, and a locking support 37 for fixing the second substrate 18 to the partition plate 36. There is. As shown in FIGS. 4 and 6, the partition plate 36 is provided at a position between the first substrate 17 and the second substrate 18 and has a total of four bosses 38 protruding from the main body 12. On the other hand, it is fixed by a second screw 41 or the like. The partition plate 36 is formed of, for example, a synthetic resin material in a rectangular plate shape, and fixedly supports the second substrate 18. The partition plate 36 not only divides the internal space into the first portion 14A and the second portion 14B, but also insulates the second substrate 18 from 12 to prevent the failure of the second substrate 18 caused by lightning or the like. It also plays a role of preventing.

  The locking support 37 is formed of a resin material such as nylon. The locking support 37 has a pair of return portions 37A, and the second substrate 18 can be sandwiched and held between the return portions 37A. The second substrate 18 is fixedly held in the second portion 14 B of the internal space 14 by the partition plate 36 and the locking support 37. As described above, in the lighting device 11 of the present embodiment, a structure in which the second substrate 18 is thermally isolated as much as possible from the heat generating component such as the light emitting element 32 is adopted.

  Then, with reference to FIG. 5, the heat radiation path | route of the lighting fixture of this embodiment is demonstrated. When power is supplied from the second substrate 18 to the light emitting element 32, the light emitting element 32 emits light and heat is generated in the light emitting element 32. The heat generated by the light emitting element 32 is mainly transmitted to the heat sink 22, and is transmitted from the heat sink 22 to the main body 12 through the rib 34 and the edge 39 of the main body 12, for example. The heat from the light emitting element 32 is mainly released from the portion of the main body 12 corresponding to the first portion 14A to the outside. Therefore, the heat from the light emitting element 32 is less likely to be transmitted to the second substrate 18 side. On the other hand, the heat generated from the second substrate 18 is transmitted to the main body 12 through the air in the internal space 14 (second portion 14B). At this time, the heat from the second substrate 18 is released to the outside from the portion of the main body 12 corresponding to the second portion 14B. Therefore, the heat from the second substrate 18 is not easily transmitted to the light emitting element 32 side.

  According to the first embodiment, in the lighting apparatus 11, the main body 12 having the internal space 14 and the plurality of light emitting elements 32 are provided on one surface 31A, and are thermally connected to the main body 12 to form the internal space 14, a first substrate 17 provided in 14, a second substrate 18 provided in the internal space 14 for lighting the light emitting element 32, and a support for supporting the second substrate 18 at a position separated from the main body 12. And 21. According to this configuration, the heat from the first substrate 17 can be positively conducted to the main body 12 side and can be made less likely to be conducted to the second substrate 18 side. Similarly, heat from the second substrate 18 is less likely to be transmitted to the main body 12, and the heat may be less likely to be transmitted to the first substrate 17 via the main body 12. As a result, the first substrate 17 and the second substrate 18 can be prevented from having an adverse thermal effect on each other.

  The heat sink 22 is provided in close contact with the other surface 31 B opposite to the one surface 31 A of the first substrate 17 and thermally connected to the main body 12. According to this configuration, the heat from the light emitting element 32 can be efficiently transmitted to the main body 12 side. Thus, the heat of the light emitting element 32 can be prevented from being transmitted to the second substrate 18 side, and the thermal runaway or abnormal operation of the second substrate 18 can be prevented.

  The support portion 21 includes a partition plate 36, which is provided at a position between the first substrate 17 and the second substrate 18, and the inner space 14 is formed of a first substrate 17. And a second portion 14B where the second substrate 18 is located. According to this configuration, the inner space 14 can be divided into two parts by the partition plate 36, and the heat transfer path from the light emitting element 32 to the main body 12 and the main body through the air from the second substrate 18 The heat transfer paths towards 12 can be separated from one another. As a result, the heat of the light emitting element 32 is transferred to the second substrate 18 side, and the heat from the second substrate 18 is transferred to the first substrate 17 side as much as possible. The thermal isolation between the second substrate 17 and the second substrate 18 can be further improved.

  In addition, the lighting fixture 11 includes a plurality of ribs 34 provided so as to protrude from the inner surface of the main body 12 and to be in contact with the heat sink 22. According to this configuration, the contact area between the heat sink 22 and the main body 12 can be increased, and the heat conduction efficiency from the heat sink 22 toward the main body 12 can be improved. Thereby, the heat from the light emitting element 32 can be efficiently transmitted to the main body 12 side, and the heat dissipation property of the heat from the light emitting element 32 can be improved. Also, the increase in weight of the main body 12 can be minimized.

  In this case, the rib 34 is provided on the first portion 14A. According to this configuration, the heat from the light emitting element 32 is transmitted along the rib 34 to the second substrate 14B while improving the heat transfer efficiency from the light emitting element 32 to the main body 12 by the rib 34 Transmission to 18 can be prevented.

  While certain embodiments of the present invention have been described above, these embodiments have been presented by way of example only, and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and the gist of the invention, and are included in the invention described in the claims and the equivalent scope thereof.

DESCRIPTION OF SYMBOLS 11 ... Lighting fixture, 14 ... Internal space, 14A ... 1st part, 14B ... 2nd part, 17 ... 1st board | substrate, 18 ... 2nd board | substrate, 21 ... Support part, 22 ... Heat sink, 31A ... One side, 31B: the other side, 32: light emitting element, 34: rib, 36: partition plate

Claims (1)

A bottomed box-shaped metal tool body having an opening on one side;
An attachment portion formed on a side surface of the device body for attaching the device body to a predetermined attachment object;
A plurality of plate-like protrusions integrally formed with the device body so as to protrude from the inner surface of the device body;
A first substrate on which a plurality of light emitting elements are mounted and thermally connected to the plurality of protrusions;
An illuminance sensor fixed so as to be separated from the mounting portion in the same direction as the surface of the first substrate on which the light emitting element is mounted;
A second substrate on which is mounted a circuit component for lighting the plurality of light emitting elements fixed in the fixture body so as to be separated from the opening from the first substrate and the illuminance sensor :
A cover made of translucent resin and attached to the device body;
A luminaire characterized by comprising.