JP2013020734A - Outdoor lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outdoor lighting fixture capable of miniaturizing the whole fixture by lessening a storage space for a plurality of LED boards in a housing.SOLUTION: The outdoor lighting fixture includes a first LED board 31 and a second LED board 32 which respectively mount LED light sources 21, and a support section 5 for supporting the first LED board 31 and the second LED board 32. The first LED board 31 and the second LED board 32 are stored in a housing. The support section 5 supports the first LED board 31 and the second LED board 32 so as to make a part 311 of the first LED board 31 and a part 321 of the second LED board 32 overlap each other when viewing from a normal direction of the first LED board 31.

Description

  The present invention relates to an outdoor lighting device that illuminates a street or the like using an LED (Light Emitting Diode) light source.

  Conventionally, outdoor lighting fixtures that illuminate streets and the like using LED light sources are known (see, for example, Patent Documents 1 and 2).

  In the outdoor lighting apparatus described in Patent Document 1, a plurality of planar printed circuit boards each having an LED mounted thereon are arranged side by side. Specifically, the plurality of planar printed circuit boards are fixed to the main body part in a symmetrically polygonal shape (a part of the polygon) as a whole.

  In the road lamp described in Patent Document 2, a plurality of LED modules are attached to a step-like mounting base.

  In the conventional outdoor lighting fixture, the irradiation range can be expanded even when a highly directional LED light source is used.

JP 2004-200102 A JP 2007-242258 A

  However, in the conventional outdoor lighting fixture, since a plurality of LED substrates each mounted with an LED light source are arranged side by side, the storage space for the LED substrates in the housing has to be increased. For this reason, the conventional outdoor lighting fixture has a problem that the entire fixture becomes large.

  In particular, in order to improve durability against lightning surge, when the fixing portion for fixing the LED substrate to the conductive housing is separated from the LED light source, the area of the LED substrate further increases, so the above problem is remarkable. become.

  In addition, even if a plurality of planar printed circuit boards have a polygonal shape as in the outdoor lighting apparatus described in Patent Document 1, since the shape is determined according to the irradiation range, the arrangement of the plurality of planar printed circuit boards is changed. Difficult to do. In addition, in the configuration in which a plurality of LED modules are attached in a stepped manner as in the road light described in Patent Document 2, the arrangement of the plurality of LED modules is determined according to the irradiation range, and therefore the arrangement of the plurality of LED modules It is difficult to change.

  The present invention has been made in view of the above points, and an object of the present invention is to provide an outdoor lighting device that can reduce the storage space of a plurality of LED substrates in a housing and reduce the overall size of the device. It is in.

  The outdoor lighting fixture of the present invention stores a first LED substrate and a second LED substrate, each of which is mounted with an LED light source, and the first LED substrate and the second LED substrate. And the first LED substrate such that a part of the first LED substrate and a part of the second LED substrate overlap each other when viewed from the normal direction of the first LED substrate. And a support portion for supporting the substrate and the second LED substrate in the housing.

  In the outdoor lighting fixture, the support portion fixes the first LED substrate at an end portion in a direction overlapping the second LED substrate among the first LED substrates, and the second LED substrate. It is preferable that the second LED substrate is fixed at an end of the LED substrate in a direction overlapping with the first LED substrate.

  In this outdoor lighting fixture, the support portion supports the first LED substrate and has a first support plate having a heat dissipation function, and supports the second LED substrate and has a second heat dissipation function. The support plate is preferably included separately.

  In this outdoor lighting apparatus, the second support plate is located at a position facing the support portion of the first LED substrate of the first support plate in the normal direction of the first LED substrate. It is preferable to expose.

  In the present invention, the support portion is the first LED substrate so that a part of the first LED substrate and a part of the second LED substrate overlap each other when viewed from the normal direction of the first LED substrate. The second LED substrate is supported in the housing. Thereby, in this invention, since the storage space of the 1st LED board and the 2nd LED board can be made small in the in-plane direction of the 1st LED board, the whole lighting fixture is made small. Can do.

It is a principal part of the outdoor lighting fixture which concerns on embodiment, Comprising: (a) is the side view seen from the longitudinal direction, (b) is a figure which shows the positional relationship of a board | substrate, (c) is the side seen from the transversal direction FIG. It is an installation drawing of the outdoor lighting fixture which concerns on the same as the above. It is a cross-sectional view of the outdoor lighting fixture which concerns on the same as the above. It is a top view which shows the inside of the outdoor lighting fixture which concerns on the same as the above. It is a half sectional view of the base end side of the outdoor lighting fixture which concerns on the same as the above. It is an external appearance perspective view of the LED unit which concerns on the same as the above, and the board | substrate for LED. It is the 1st support plate which concerns on the same as the above, Comprising: (a) is a front view, (b) is the side view seen from the transversal direction. It is an external appearance perspective view of the 2nd support plate which concerns on the same as the above. It is the 2nd supporting plate which concerns on the same, Comprising: (a) is a front view, (b) is the side view seen from the longitudinal direction, (c) is the side view seen from the transversal direction.

  Hereinafter, the outdoor lighting fixture which illuminates a street etc. using an LED light source is demonstrated.

  The outdoor lighting device 1 according to the present embodiment is used as a streetlight for illuminating a street 8 as shown in FIG. That is, the outdoor lighting fixture 1 and the pole 7 constitute a street lamp. Specifically, the outdoor lighting device 1 is used as a crime prevention light for crime prevention or as a road illumination light for illuminating a roadway.

  As shown in FIGS. 1 and 3 to 5, the outdoor lighting device 1 of the present embodiment includes a plurality (three in FIG. 1) of LED substrates 3, 3, and 3 each having an LED unit 2 mounted thereon, And a housing 4 in which each LED substrate 3 is housed. Moreover, the outdoor lighting fixture 1 includes a support portion 5 that supports each LED substrate 3 within the housing 4.

  The plurality of LED substrates 3, 3, 3 shown in FIG. 1 includes a first LED substrate 31 and a plurality (two in the illustrated example) of second LED substrates 32, 32. Each LED substrate 3 is a printed circuit board formed in an elongated shape. A plurality of LED light sources 21, 21,... Described later (see FIG. 3) are mounted on a substantially central portion of each LED substrate 3, and a plurality of LED light sources 21, 21,. Recesses 33, 33,... (See FIG. 6) are formed (four in the illustrated example). Each concave portion 33 shown in FIG. 6 is used when the LED substrate 3 is attached to the conductive support portion 5 (see FIG. 1A). Here, the distance L1 (refer FIG. 6) between the LED light source 21 and the recessed part 33 is preferable long at the point of protecting the LED light source 21 from a lightning surge.

  As shown in FIG. 3, each LED unit 2 includes a plurality (eight in the illustrated example) of LED light sources 21, 21,... And a lens unit 22 disposed so as to cover each LED light source 21. Yes.

  A plurality of LED light sources 21, 21,... Are mounted in a line along the longitudinal direction of the LED substrate 3 on one surface of the LED substrate 3. Although not shown, each LED light source 21 includes a mounting board formed in a rectangular plate shape and an LED chip mounted substantially at the center of the mounting board. The LED chip mounted on the mounting substrate is molded with a resin layer. In each LED light source 21, the LED chip emits light when power is supplied.

  As shown in FIG. 6, the lens unit 22 is a resin molded product in which a plurality (eight in the illustrated example) of optical lenses 23, 23,... It is arranged on one surface of the LED substrate 3 so as to cover the LED light source 21. The lens unit 22 is attached to the support portion 5 (see FIG. 1A) together with the LED substrate 3.

  Each optical lens 23 is a member formed of a translucent material such as acrylic resin, for example, and a bullet-shaped lens body 231 and prismatic reflecting portions 232 and 232 are integrally provided. The lens body 231 is a convex lens provided with a convex curved surface that is convex in the light emission direction from the LED light source 21. The reflecting portions 232 and 232 are provided on both sides of the lens body 231 in order to reflect the light from the LED light source 21 forward. The outer surface 233 of each reflecting portion 232 is formed in a curved surface that totally reflects the light incident on the reflecting portion 232. Thereby, the light which leaks from the reflection part 232 to the side can be suppressed. Further, a heat radiating hole 234 for releasing heat generated by the LED light source 21 to the outside is formed behind each reflecting portion 232.

  The attachment member 24 is a member for attaching each optical lens 23 to the LED substrate 3. The mounting member 24 is provided with a shielding portion 241 between two adjacent optical lenses 23 and 23. The shielding unit 241 can suppress light interference between the two adjacent optical lenses 23 and 23.

  The support portion 5 shown in FIG. 1A includes a first support plate 51 that supports the first LED substrate 31 and a second support plate 52 that supports the plurality of second LED substrates 32 and 32. Are provided separately.

  The first support plate 51 is a member made of, for example, aluminum or aluminum alloy, and is a heat dissipation plate having a heat dissipation function. As shown in FIG. 7, the first support plate 51 is integrally provided with a rectangular center portion 511, a pair of extending portions 512, 512, and a pair of tip portions 513, 513. A plurality of (two in the illustrated example) insertion holes 514 and 514 are formed at both ends along the longitudinal direction of the central portion 511. The extending portion 512 is provided so as to extend from the end portion in the longitudinal direction of the central portion 511 along the normal direction of the central portion 511. The tip portion 513 is provided to extend outward from the tip of the extending portion 512. An insertion hole 515 is formed in the distal end portion 513. The insertion hole 515 is used when the first support plate 51 and the second support plate 52 are fixed to an instrument body 41 (see FIG. 4) described later.

  The mounting screw 54 (see FIG. 4) is inserted through the insertion hole 514 of the first support plate 51 with the concave portion 33 of the first LED substrate 31 interposed therebetween, whereby the first support plate 51 is The LED substrate 31 is fixed at the position of the central portion 511. That is, when the direction in which the first LED substrate 31 and the plurality of second LED substrates 32 and 32 are arranged is a specific direction, the first support plate 51 is the above-described one of the first LED substrate 31. The first LED substrate 31 is fixed at the end in the specific direction. The first support plate 51 radiates heat generated by the LED light source 21 mounted on the first LED substrate 31 to the outside while the first LED substrate 31 is fixed.

  The second support plate 52 is a member made of, for example, aluminum or aluminum alloy, and is a heat dissipation plate having a heat dissipation function. As shown in FIGS. 8 and 9, the second support plate 52 includes a central portion 521, a pair of side surface portions 522 and 522, a pair of extending portions 523 and 523, a pair of tip portions 524 and 524, A pair of extending portions 525 and 525 and a pair of tip portions 526 and 526 are integrally provided. The central part 521 is formed in a rectangular shape. The side surface portion 522 is provided to extend from the end portion of the central portion 521 in the short direction, and is formed in a rectangular shape. A plurality of (two in the illustrated example) insertion holes 527 and 527 are formed at both ends along the longitudinal direction of the side surface portion 522. The extending portion 523 is provided so as to extend from a part of the outer edge of the side surface portion 522 in the short direction along the normal direction of the central portion 521. The distal end portion 524 is provided to extend outward from the outer edge of the extending portion 523. Concave portions 528 and 528 are formed in the distal end portion 524. The recess 528 is used when the second support plate 52 is fixed to the instrument body 41. The extending portion 525 is provided so as to extend from the end portion in the longitudinal direction of the central portion 521 along the normal direction of the central portion 521. The distal end portion 526 is provided to extend outward from the distal end of the extending portion 525. An insertion hole 529 is formed in the distal end portion 526. The insertion hole 529 is used when the second support plate 52 is fixed to the instrument body 41 together with the first support plate 51.

  The mounting screw 55 (see FIG. 4) is inserted into the insertion hole 527 of the second support plate 52 across the recess 33 of the second LED substrate 32, whereby the second support plate 52 is The LED substrate 32 is fixed at the position of the side surface portion 522. That is, when the direction in which the first LED substrate 31 and the plurality of second LED substrates 32 and 32 are arranged is a specific direction, the second support plate 52 is attached to each second LED substrate 32. On the other hand, the second LED substrate 32 is fixed at the end portion in the specific direction of the second LED substrate 32. The second support plate 52 releases heat generated by the LED light source 21 mounted on the second LED substrate 32 to the outside in a state where the second LED substrate 32 is fixed.

  As described above, when the first support plate 51 supports the first LED substrate 31 and the second support plate 52 supports the plurality of second LED substrates 32, 32, the plurality of LED substrates 3. 1, 3 and the structure of the support 5 are as shown in FIG. In this case, when viewed from the normal direction of the first LED substrate 31 (vertical direction in FIG. 1A), as shown in FIG. 1B, the first LED substrate 31 and the second LED substrate The part 311 of the first LED substrate 31 and the part 321 of each second LED substrate 32 overlap so that the LED substrate 32 does not interfere. That is, the support portion 5 is configured so that the first LED substrate 31 and the plurality of second LED substrates 31 and the plurality of second LED substrates 31 overlap each other so that the part 311 of the first LED substrate 31 and the part 321 of each second LED substrate 32 overlap. The LED substrates 32 and 32 are supported in the housing 4.

  Thereby, compared with the case where the 1st LED board 31 and each 2nd LED board 32 do not overlap, the in-plane direction (FIGS. 1A and 1B) of the first LED board 31 Direction), the storage space for the first LED substrate 31 and the plurality of second LED substrates 32, 32 can be reduced.

  However, the first LED substrate 31 and the plurality of second LED substrates 32, 32 are arranged so as not to impair the optical characteristics of the light from the LED light source 21 mounted on each second LED substrate 32. Has been.

  In addition, as shown in FIG. 1C, the second support plate 52 is formed on the first support plate 51 in the normal direction of the first LED substrate 31 (the vertical direction in FIG. 1C). A portion facing the central portion 511 is exposed. That is, the central portion 521 of the second support plate 52 is exposed at a position facing the central portion 511 of the first support plate 51. The central portion 511 of the first support plate 51 and the central portion 521 of the second support plate 52 face each other in parallel. As a result, heat from the first LED substrate 31 is transferred from the first support plate 51 to the second support through the air layer in the space 53 between the first support plate 51 and the second support plate 52. It can be transmitted to the plate 52. Further, heat from the first LED substrate 31 can be released from the first support plate 51 to the outside by convection of the space 53 between the first support plate 51 and the second support plate 52. .

  Further, the first support plate 51 fixes the first LED substrate 31 at an end portion of the first LED substrate 31 in the direction overlapping the second LED substrate 32. Similarly, the second support plate 52 fixes the second LED substrate 32 at the end of the second LED substrate 32 in the direction overlapping the first LED substrate 31.

  The housing 4 shown in FIGS. 3 to 5 includes an instrument main body 41 and a glove 42 attached to one surface side of the instrument main body 41 so as to be freely opened and closed.

  The instrument body 41 is a member made of, for example, aluminum die cast, and is formed in a long and narrow box shape with one surface opened. The instrument body 41 is provided with a ground terminal 43. The instrument main body 41 is provided with a plurality of (four in total) protruding portions 412 and 412 protruding from the two side surface portions 411. Each protrusion 412 is formed with a screw hole (not shown). The second support plate 52 is attached to the instrument body 41 by the attachment screw 45 being screwed into the screw hole of the protruding portion 412 with the recess 528 (see FIG. 8) interposed therebetween. Further, the first support plate 51 and the second support plate 52 are attached to the instrument body 41 by the mounting screws 46 inserted through the insertion holes 515 (see FIG. 7) and the insertion holes 529 (see FIG. 8). Thereby, the 1st support plate 51 and the 2nd support plate 52 are arrange | positioned in the approximate center part of the instrument main body 41 by the positional relationship as shown to Fig.1 (a). At this time, each LED substrate 3 is arranged so that the longitudinal direction of the LED substrate 3 and the longitudinal direction of the instrument body 41 substantially coincide.

  By the way, as shown in FIG. 3, an automatic flasher (EE switch) 6 is accommodated in the instrument main body 41. The automatic flasher 6 compares the ambient brightness with a threshold value, and switches the lighting state of the LED light source 21 according to the comparison result.

  Moreover, the arm 44 for attaching the outdoor lighting fixture 1 to the pole 7 (refer FIG. 2) is provided in the base end of the fixture main body 41. As shown in FIG. The outdoor lighting fixture 1 is attached to the tip of the pole 7 using an arm 44. The base end portion of the pole 7 is embedded and fixed in the ground. The outdoor lighting fixture 1 may have a structure that is directly attached to the tip of the pole 7.

  Further, a recess 413 is formed at the tip of the instrument body 41, and a cylindrical protrusion 415 is provided to protrude inward from each of the side surfaces 414, 414 of the recess 413. On the other hand, a screw hole 416 is formed at the proximal end of the instrument body 41.

  The globe 42 is a member formed of a light-transmitting material such as acrylic resin, and is formed in a long and narrow box shape with one surface opened. A concave portion 421 that fits with the pair of projecting portions 415 and 415 of the instrument main body 41 is formed at the distal end of the globe 42 in the longitudinal direction (end opposite to the pole 7 side). By fitting each protrusion 415 into the recess 421, the globe 42 is attached to one surface side of the instrument body 41 so as to be openable and closable with the protrusion 415 as an axis. On the other hand, an insertion hole 422 is formed at the base end in the longitudinal direction of the globe 42 (the end on the pole 7 side). The manager can close the globe 42 and close the opening of the instrument body 41 by inserting the attachment screw 47 into the insertion hole 422 and screwing the attachment screw 47 into the insertion hole 416. At this time, the globe 42 can transmit the light emitted from the LED light source 21. On the other hand, the administrator can open the globe 42 by removing the mounting screw 47 from the screw hole 416.

  In the outdoor lighting fixture 1 having such a structure, the LED light source 21 mounted on the first LED substrate 31 emits light in the normal direction of the first LED substrate 31, and the second LED substrate. The LED light source 21 mounted on 32 emits light in the normal direction of the second LED substrate 32. That is, the outdoor lighting fixture 1 irradiates the downward direction with the LED light source 21 mounted on the first LED substrate 31, and the oblique downward direction with the LED light source 21 mounted on each second LED substrate 32. Irradiate. Thereby, the outdoor lighting fixture 1 can irradiate a wide area | region.

  From the above description, in the outdoor lighting fixture 1 of the present embodiment, a part 311 of the first LED substrate 31 and each second LED substrate 32 as viewed from the normal direction of the first LED substrate 31. The support portion 5 supports the plurality of LED substrates 3, 3, and 3 so that a part 321 of the LED overlaps. Thereby, it is possible to reduce the storage space for the plurality of LED substrates 3, 3, 3 in the in-plane direction of the first LED substrate 31 than when the plurality of LED substrates are arranged without overlapping. Since it can do, the whole instrument can be reduced in size.

  Moreover, the outdoor lighting fixture 1 of this embodiment has the support part 5 fixing the LED board 3 in the edge part of the direction which overlaps with the other LED board 3 among the LED boards 3. FIG. Thereby, in LED board 3, since distance L1 (refer FIG. 6) between LED light source 21 and a fixed position can fully be ensured, the durability with respect to a lightning surge is improved rather than the case where distance L1 is short. Can be made.

  Furthermore, in the outdoor lighting fixture 1 of the present embodiment, the first support plate 51 supports the first LED substrate 31, and the second support plate 52 includes the plurality of second LED substrates 32 and 32. To support. As a result, it is possible to easily secure a necessary heat radiation area for each LED substrate 3, so that the support unit 5 supports the plurality of LED substrates 3, 3, 3 in the housing 4 without reducing the heat radiation efficiency. can do. Moreover, the outdoor lighting fixture 1 of this embodiment divides | segments the heat from several LED board | substrates 3,3,3 into the 1st support plate 51 and the 2nd support plate 52, and discharge | releases it outside. . Thus, each support plate (the first support plate 51 and the second support plate 52) is more than the case where heat from all the LED substrates 3, 3, and 3 is released to the outside with one support plate. The required heat capacity may be small. As a result, the size of the support plates (first support plate 51 and second support plate 52) per sheet can be reduced.

  Moreover, the outdoor lighting fixture 1 of this embodiment is the center part of the 2nd support plate 52 in the position facing the support part (center part 511) of the board | substrate 31 for 1st LED of the 1st support plate 51. FIG. 521 is exposed. Thereby, the heat from the first LED substrate 31 is first supported through the air layer in the space 53 between the central portion 511 of the first support plate 51 and the central portion 521 of the second support plate 52. Transmission from the plate 51 to the second support plate 52 is possible.

DESCRIPTION OF SYMBOLS 1 Outdoor lighting fixture 21 LED light source 31 1st LED board 311 Part 32 2nd LED board 321 Part 4 Housing 5 Support part 51 1st support plate 52 2nd support plate

Claims (4)

A first LED substrate and a second LED substrate each having an LED light source mounted thereon;
A housing that houses the first LED substrate and the second LED substrate;
The first LED substrate and the second LED substrate so that a part of the first LED substrate and a part of the second LED substrate overlap each other when viewed from the normal direction of the first LED substrate. And a support part for supporting the LED substrate in the housing. The support part is
The first LED substrate is fixed at an end of the first LED substrate in an overlapping direction with the second LED substrate,
The outdoor lighting apparatus according to claim 1, wherein the second LED substrate is fixed at an end of the second LED substrate in a direction overlapping with the first LED substrate. The support part is
A first support plate that supports the first LED substrate and has a heat dissipation function;
The outdoor lighting apparatus according to claim 1, further comprising: a second support plate that supports the second LED substrate and has a heat dissipation function.   The second support plate is exposed at a position facing a support portion of the first LED substrate of the first support plate in a normal direction of the first LED substrate. The outdoor lighting fixture according to claim 3.

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