JP2015225816A - Light source unit and lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve improvement of a heat radiation property while suppressing deterioration of optical performance.SOLUTION: In a light source unit 1, a light distribution control member (lens block 4) is mounted on a heat radiation member 3 via a mounting member 5. Therefore, compared to the case where the light distribution control member (lens block 4) is directly mounted on the heat radiation member 3 only by screwing, there is less risk of distortion occurring in the light distribution control member (lens block 4) by screw fastening torque. Furthermore, as a mounting substrate 21 is pressed against a base part 30 of the heat radiation member 3 by a pressing part 503 of the mounting member 5, heat generated by a solid light emitting element (LED 20) is efficiently transmitted to the heat radiation member 3 from the mounting substrate 21. As a result, the light source unit 1 of this embodiment can achieve improvement of a heat radiation property while suppressing deterioration of optical performance.

Description

  The present invention relates to a light source unit that uses a solid-state light emitting element as a light source, and a lighting fixture in which the light source unit is mounted.

  As a conventional example, a lighting apparatus described in Patent Document 1 is illustrated. This conventional example includes an instrument body, a light source block (light source unit), a lighting device, and the like. The instrument body is formed in a cylindrical shape having an open bottom surface. The light source block includes a printed board on which a plurality of LEDs are mounted on one surface, a lens body that collects light from each LED, and a mounting plate to which the printed board and the lens body are attached. The lens body is attached to the attachment plate with an attachment screw. The printed circuit board is disposed between the lens body and the mounting plate. Moreover, the printed circuit board is in contact with the mounting plate via the heat conductive sheet. The mounting plate is attached to the instrument body by a mounting portion having heat dissipation.

  In the conventional example described in Patent Document 1, since the mounting plate is attached to the fixture body using a heat radiating mounting portion, heat can also be radiated from the mounting portion, and a light source can be emitted from the mounting plate to the fixture body via the mounting portion. The heat of the block is conducted efficiently and can be dissipated from the instrument body.

JP 2006-172895 A

  However, in the conventional example described in Patent Document 1, since the lens body is directly screwed to the mounting plate, if the tightening torque is increased, the lens body may be distorted and the optical performance may be deteriorated. On the other hand, if the tightening torque is small, the degree of adhesion between the printed circuit board and the mounting plate (including the heat conductive sheet) is reduced, so that it is difficult for heat to be transferred from the printed circuit board to the heat radiating member such as the mounting plate and mounting part. There is a risk that the performance will be reduced.

  The present invention has been made in view of the above problems, and an object thereof is to improve heat dissipation while suppressing a decrease in optical performance.

  The light source unit of the present invention includes one or more solid light emitting elements, a mounting substrate on which the solid light emitting elements are mounted, and a light distribution control member that controls the light distribution of light emitted from the solid light emitting elements. And a heat dissipating member that dissipates heat generated by the solid state light emitting device, and a mounting member that attaches the mounting board to the heat dissipating member, and the heat dissipating member is attached to the back surface of the mounting board directly or via another member. The mounting member includes a pressing portion that is pressed against a portion of the surface of the mounting substrate where the solid light emitting element is not mounted, a fixing portion that is fixed to the base portion, and the arrangement. And a support portion for supporting the light control member.

  The lighting fixture of this invention is equipped with one of the said light source units, and the fixture main body holding the said light source unit, It is characterized by the above-mentioned.

  The light source unit and the lighting fixture of the present invention have an effect that heat dissipation can be improved while suppressing a decrease in optical performance.

It is a disassembled perspective view which shows embodiment of the light source unit which concerns on this invention. 2A is a front view, FIG. 2B is a rear view, FIG. 2C is a left side view, and FIG. 2D is a top view. It is a front view of the lens block in the same as the above. It is a rear view of the lens block in the same as the above. It is a side view of the lens block in the same as the above. It is a front view of the attachment member in the same as the above. It is a rear view of the attachment member in the same as the above. It is a side view of the attachment member in the same as the above. It is a perspective view of the state which removed the cover block same as the above. It is sectional drawing of the principal part same as the above. It is a perspective view which shows embodiment of the lighting fixture which concerns on this invention.

  Hereinafter, embodiments of a light source unit according to the present invention and embodiments of a lighting fixture according to the present invention will be described in detail with reference to the drawings.

  First, the light source unit 1 of the present embodiment will be described. In the following description, unless otherwise specified, the vertical, horizontal, and front-rear directions are defined in FIG.

  As shown in FIG. 1, the light source unit 1 includes an LED module 2, a heat radiating member 3, a lens block 4, and an attachment member 5. Furthermore, the light source unit 1 preferably includes a heat conductive sheet 6 and a cover block 7.

  The LED module 2 includes a plurality (22 in the illustrated example) of light emitting diodes (LEDs) 20 and a mounting substrate 21. The LED 20 is a package-type white LED that is conventionally known. The mounting substrate 21 is formed of a rectangular flat plate-like aluminum substrate. The mounting substrate 21 is provided with a circular hole 210 in the center. The LEDs 20 are mounted on the upper surface of the mounting substrate 21 side by side in the vertical and horizontal directions. In addition, two receptacle connectors 22 are mounted side by side at the front end on the upper surface of the mounting substrate 21. These two receptacle connectors 22 are connected to the electrodes (cathode and anode) of each LED 20 via a wiring conductor (not shown) formed on the upper surface of the mounting substrate 21.

  As shown in FIGS. 1 and 2, the heat radiating member 3 includes a base portion 30, a pair of edge portions 31, and a plurality of heat radiating plates 32. In addition, it is preferable that the base part 30, the edge part 31, and the heat sink 32 are formed with the material excellent in thermal conductivity, such as aluminum alloy, for example.

  The base part 30 is formed in a rectangular flat plate shape. The base portion 30 has a large number of screw holes (female screws) 300 provided on the upper surface. A circular insertion hole 301 passes through the corner of the base portion 30. A cable gland 33 is attached to the insertion hole 301, and the power supply line 23 for supplying power to the LED module 2 is inserted through the cable gland 33.

  The pair of edge portions 31 have a rectangular parallelepiped shape with the left-right direction as the longitudinal direction, and are formed integrally with the base portion 30 at the front end edge and the rear end edge of the base portion 30. The thickness (width in the vertical direction) of the edge portion 31 is sufficiently larger than the thickness of the base portion 30.

  The edge portion 31 includes a first coupling portion 310 coupled to another member from a first direction (left-right direction) intersecting with a thickness direction (vertical direction) of the mounting substrate 21, and another portion from the second direction (front-back direction). A second coupling portion 311 coupled to the member is provided. Furthermore, it is preferable that the edge part 31 is provided with the 3rd coupling | bond part 312 couple | bonded with another member from the thickness direction (up-down direction).

  The first coupling portion 310 is configured by a screw hole (female screw). One first coupling portion 310 is provided on each end face in the longitudinal direction (left-right direction) of the edge portion 31. The second coupling portion 311 is configured by a screw hole (female screw) that penetrates the edge portion 31 in the front-rear direction. A plurality of second coupling portions 311 are provided at intervals along the longitudinal direction (left-right direction) of the edge portion 31. The third coupling portion 312 is configured with a screw hole (female screw). As shown in FIG. 2B, two third coupling portions 312 are provided on the lower surface side of the edge portion 31 so as to be aligned in the longitudinal direction.

  In addition, the groove part 34 which consists of the space surrounded by the edge part 31, the heat sink 32 (the heat sink 32 adjacent to the edge part 31), and the base part 30 is provided in the heat radiating member 3 (refer FIG. 2C).

  As shown in FIGS. 3 to 5, in the lens block 4, a main body 40 and a plurality of lenses 41 are integrally formed of a synthetic resin material having translucency such as acrylic resin. The main body 40 includes a rectangular flat plate-like bottom plate 400 and a peripheral wall 401 that protrudes downward from the four circumferences of the bottom plate 400. On the lower surface of the bottom plate 400, a plurality of lenses 41 are formed in one piece, arranged vertically and horizontally. In addition, these lenses 41 are provided in the number and position corresponding to each LED20 of the LED module 2 one to one.

  Two hook pieces 402 are provided at both ends (both ends in the front-rear direction) on the left and right side surfaces of the peripheral wall 401, respectively. The hook piece 402 is formed in a concave shape when viewed in the up-down direction. In addition, three fixed pieces 403 are integrally formed on the peripheral wall 401. These fixed pieces 403 are provided so as to protrude downward from the lower end edge of the peripheral wall 401. The fixed piece 403 is formed in a C shape when viewed from the top and bottom directions. These three fixing pieces 403 are respectively provided at the center positions in the longitudinal direction on the left and right sides and the rear side of the peripheral wall 401 (see FIG. 3).

  As shown in FIGS. 6 to 8, the mounting member 5 is made of a synthetic resin material having no translucency such as PBT (polybutylene terephthalate) resin, so that the base 50, the peripheral wall portion 51, the flange 52, and the support portion 53. It is integrally formed.

  The base 50 is formed in a rectangular flat plate shape. As shown in FIG. 6, a plurality of recesses 500 are formed on the upper surface of the base 50 so as to be arranged vertically and horizontally. A circular window hole 501 is opened at the center of the bottom surface of each recess 500. As will be described later, light emitted from the LED 20 is incident on the lens 41 through these window holes 501. However, the recess 500 located in the center of the base 50 is provided with a screw insertion hole 502 having a smaller diameter than the window hole 501 of the other recess 500. In addition, rectangular holes 5000 are provided in the recesses 500 that are located at both front and rear ends of the base 50 and are smaller than the other recesses 500.

  Further, as shown in FIG. 7, a plurality of pressing portions 503 are formed on the lower surface of the base 50 so as to be arranged vertically and horizontally. These pressing portions 503 are formed in a truncated pyramid shape protruding downward from the lower surface of the base 50. However, the concave portion 500 and the pressing portion 503 are formed so as to overlap each other when viewed from the thickness direction (vertical direction) of the base 50, and a window hole 501 of the concave portion 500 is opened at the center of the pressing portion 503.

  The peripheral wall 51 is formed in a rectangular frame shape when viewed in the vertical direction, and protrudes upward and downward from the periphery of the base 50. However, the downward protrusion amount of the peripheral wall portion 51 is extremely smaller than the upward protrusion amount of the peripheral wall portion 51. In the following description, if necessary, the peripheral wall portion 51 protruding above the base 50 is referred to as an upper peripheral wall portion 51A, and the peripheral wall portion 51 protruding below the base 50 is referred to as a lower peripheral wall portion 51B. To do.

  A plurality (eight in the illustrated example) of cylindrical ribs 510 project upward from the flat upper surface of the upper peripheral wall 51A. In addition, in the upper peripheral wall portion 51A, recesses 511 are formed in portions adjacent to the hole 5000 of the base 50 in the front-rear direction.

  The flange 52 is provided so as to protrude outward from the peripheral surface of the peripheral wall portion 51 over the entire periphery. The flange 52 is provided with screw insertion grooves 520 at four corners, respectively. The flange 52 is also provided with two screw insertion grooves 520 on each of the four sides.

  The support portion 53 has a rectangular plate shape, and is provided with a triangular prism-shaped claw 530 at the tip (upper end). Two support portions 53 are provided so as to protrude upward from the upper surfaces of the left and right sides of the flange 52. However, the claws 530 of these four support portions 53 protrude in a direction approaching the peripheral wall portion 51.

  The heat conductive sheet 6 is formed in a rectangular sheet shape by a material (for example, silicone resin) excellent in electrical insulation and heat conductivity. In the center of the heat conductive sheet 6, a circular hole 60 facing the hole 210 of the mounting substrate 21 is provided (see FIG. 1).

  As shown in FIG. 1, the cover block 7 includes a cover 70, four pressing plates 71, and a seal member 72. The cover 70 includes a cover main body 700 and an outer casing 701. The cover body 700 and the outer casing 701 are integrally formed of a synthetic resin material having translucency such as polycarbonate resin. The cover body 700 is formed in a flat rectangular box shape. Further, the lower surface of the cover body 700 is opened (opened).

  The outer casing 701 is formed in a rectangular frame shape when viewed in the vertical direction, and projects outward from the opening edge of the cover body 700. In addition, circular fitting holes 702 are provided at the four corners of the outer casing 701, respectively. Further, three circular screw insertion holes 703 are provided at four intervals on the four sides of the outer casing 701, respectively.

  The holding plate 71 has a strip-shaped main piece 710 and side pieces 711. The side piece 711 hangs downward from one end edge along the longitudinal direction of the main piece 710. The main piece 710 and the side piece 711 are integrally formed of a metal plate. The main piece 710 is provided with circular screw insertion holes 712 at both ends and the center in the longitudinal direction.

  The seal member 72 is formed in a rectangular frame shape from, for example, silicone rubber. In addition, at the four corners of the seal member 72, protrusions 720 having a shape similar to the outer shape of the bolt protrude upward. In addition, three circular screw insertion holes 721 are provided at four intervals on each of the four sides of the seal member 72.

  Next, the procedure for assembling the light source unit 1 will be described.

  First, the operator lays the heat conductive sheet 6 on the upper surface of the base portion 30 of the heat radiating member 3, and places the LED module 2 and the mounting member 5 on the heat conductive sheet 6. However, it is preferable that the worker inserts the LED module 2 into the lower peripheral wall portion 51B of the attachment member 5 in advance.

  Then, the operator screws the screw 54 inserted into each screw insertion groove 520 of the flange 52 and the screw 54 inserted into the screw insertion hole 502 at the center of the base 50 into the screw hole 300 of the base portion 30, thereby attaching the mounting member. 5 is fixed to the base portion 30. That is, the LED module 2 is attached to the heat dissipation member 3 by the attachment member 5 fixed to the base portion 30. Each LED 20 of the LED module 2 is located at the center of each window hole 501 of the mounting member 5.

  Subsequently, the operator connects a plug connector (not shown) to the receptacle connector 22 of the LED module 2 through the hole 5000 of the recess 500, and then connects the power supply line 23 to which the plug connector is connected to the cable. It passes through the insertion hole 301 of the base portion 30 through the ground 33.

  Next, the operator puts the lens block 4 on the mounting member 5. At this time, the operator hooks the claws 530 of the four support portions 53 of the attachment member 5 to the centers of the hook pieces 402 of the lens block 4. At this time, the peripheral wall 401 of the main body 40 of the lens block 4 is placed on the plurality of ribs 510 of the peripheral wall portion 51 of the mounting member 5, and the height of the rib 510 is between the lens block 4 and the mounting member 5. A gap of that size is formed. Then, the operator pulls the power supply line 23 out of the lens block 4 through a space formed by the gap and the recess 511 of the upper peripheral wall portion 51A of the attachment member 5 (see FIG. 9).

  Further, the operator screws the fixing piece 403 of the lens block 4 to the base portion 30. However, since the lens block 4 is supported by the mounting member 5 by the four support portions 53, it is not necessary to increase the tightening torque. Therefore, there is no possibility that the lens block 4 is distorted as the fixing piece 403 is screwed.

  Finally, the operator attaches the cover block 7 to the base portion 30. First, the operator attaches the seal member 72 to the lower surface of the outer casing 701 of the cover 70 by fitting the four protrusions 720 into the fitting holes 702. Then, the operator covers the lens block 4 with the cover 70 to which the seal member 72 is attached. Then, the operator places the four pressing plates 71 on the outer casing 701 of the cover 70, and inserts the screws 73 inserted into the screw insertion holes 712 of the main piece 710 and the screw insertion holes 721 of the seal member 72 into the base portion 30. Then, the cover block 7 is attached to the base portion 30. The light source unit 1 of the present embodiment is assembled by the procedure as described above.

  Here, as shown in FIG. 10, the mounting substrate 21 of the LED module 2 is pressed downward (direction approaching the heat conductive sheet 6 and the base portion 30) by the pressing portion 503 of the mounting member 5. Therefore, the degree of adhesion between the mounting substrate 21 and the heat conductive sheet 6 and between the heat conductive sheet 6 and the base portion 30 is increased by being pressed by the pressing portion 503. As a result, heat generated in the LED module 2 can be efficiently conducted to the heat radiating member 3 to improve heat dissipation. In particular, in the light source unit 1 of the present embodiment, the plurality of pressing portions 503 respectively press the periphery of the LEDs 20 on the upper surface of the mounting substrate 21 (see FIG. 10), so that the mounting substrate 21 and the heat conduction sheet 6 (heat radiation member) The degree of adhesion with 3) can be further increased.

  The light source unit 1 of this embodiment controls the light distribution of one or more solid light emitting elements (LEDs 20), a mounting substrate 21 on which the solid light emitting elements are mounted, and light emitted from the solid light emitting elements. A light distribution control member (lens block 4). In addition, the light source unit 1 of the present embodiment includes a heat radiating member 3 that radiates heat generated by the solid state light emitting elements, and a mounting member 5 that attaches the mounting substrate 21 to the heat radiating member 3. The heat dissipating member 3 has a base portion 30 that is in contact with the back surface (lower surface) of the mounting substrate 21 directly or through another member (heat conducting sheet 6). The mounting member 5 includes a pressing portion 503 pressed against a portion where the solid light emitting element is not mounted on the surface (lower surface) of the mounting substrate 21, a fixing portion (flange 52) fixed to the base portion 30, and a light distribution. And a support portion 53 that supports the control member (lens block 4).

  In the light source unit 1 of the present embodiment, the light distribution control member (lens block 4) is attached to the heat dissipation member 3 via the attachment member 5 as described above. Therefore, compared with the case where the light distribution control member (lens block 4) is directly attached to the heat radiating member 3 only by screwing, there is less possibility that the light distribution control member (lens block 4) is distorted by screw tightening torque. In addition, since the mounting substrate 21 is pressed against the base portion 30 of the heat dissipation member 3 by the pressing portion 503 of the mounting member 5, the heat generated by the solid light emitting element (LED 20) is efficiently transferred from the mounting substrate 21 to the heat dissipation member 3. Conducted. As a result, the light source unit 1 of the present embodiment can improve heat dissipation while suppressing a decrease in optical performance.

  Moreover, in the light source unit 1 of this embodiment, it is preferable that the attachment member 5 has the some press part 503. FIG. Moreover, it is preferable that the several press part 503 is comprised so that the circumference | surroundings of one solid light emitting element (LED20) may be enclosed, respectively. Thus, if the attachment member 5 has the several press part 503, the heat dissipation by the heat radiating member 3 can further be improved.

  Furthermore, in the light source unit 1 of this embodiment, it is preferable that the support part 53 is provided in the outer peripheral part (flange 52) of the attachment member 5. FIG.

  Further, in the light source unit 1 of the present embodiment, the mounting member 5 is formed of an electrically insulating material (synthetic resin) and extends in a direction (front-rear direction and left-right direction) intersecting the thickness direction of the mounting substrate 21. It is preferable to have a restricting portion (lower peripheral wall portion 51B) that restricts movement. If the restricting portion (the lower peripheral wall portion 51 </ b> B) restricts the movement of the mounting substrate 21, the positional deviation between the mounting member 5 and the mounting substrate 21 can be suppressed.

  Further, in the light source unit 1 of the present embodiment, the mounting member 5 includes a fixing portion (flange 52) screwed to the base portion 30 and a stress relaxation portion (upper peripheral wall portion 51A) provided around the fixing portion. It is preferable. The stress relaxation portion (upper peripheral wall portion 51A) is preferably configured to relieve stress generated around the fixed portion (flange 52) by screwing. For example, if the stress relaxation portion (upper peripheral wall portion 51A) is formed sufficiently thicker than the fixing portion (flange 52) as in this embodiment, the stress generated around the fixing portion (flange 52) by screwing Can be relaxed.

  Moreover, in the light source unit 1 of this embodiment, it is preferable that the support part 53 is comprised so that a clearance gap may be left between light distribution control members (lens block 4), and a light distribution control member may be supported. For example, as in the present embodiment, a plurality of ribs 510 are provided on the upper surface of the peripheral wall portion 51 of the mounting member 5, and the lens block 4 is placed on the rib 510, whereby the lens block 4 and the mounting member 5 are A gap corresponding to the height of the rib 510 may be formed between them. If the light source unit 1 is configured in this way, the power supply line 23 to the LED module 2 can be wired through the gap.

  Next, an embodiment of a lighting fixture according to the present invention will be described with reference to FIG. In addition, although the lighting fixture of this embodiment has illustrated the projector, it may be lighting fixtures other than a projector, for example, the lighting fixture for high ceilings installed in high ceilings, such as a gymnasium and a hall.

  The lighting fixture of this embodiment includes a light source unit 1 and a fixture body 10 that holds the light source unit 1. In addition, although the lighting fixture of this embodiment is provided with the four light source units 1, you may provide the three or less light source units 1 or the five or more light source units 1. FIG.

  The instrument body 10 is composed of a plurality of metal plates. The four light source units 1 are arranged in two vertical rows and two horizontal rows, and the coupling portions 310 to 312 provided on the edge 31 of the heat radiating member 3 and the instrument body 10 are screws (or bolts and nuts). By being coupled, the instrument body 10 is held.

  A wiring box 11 is attached to the instrument body 10. The wiring box 11 is formed in a rectangular box shape with a metal material, and is disposed at a position facing the heat radiating member 3 of the light source unit 1. A relay terminal block (not shown) is housed in the wiring box 11, and a power cable drawn from outside and the power supply line 23 of each light source unit 1 are connected via the terminal block. The power cable is connected to a power supply device (not shown) installed outside the wiring box 11. That is, power is supplied from the power supply device to each light source unit 1 through the terminal block in the wiring box 11. However, the power supply device may be housed in the wiring box 11.

  The instrument body 10 is rotatably supported by the arm 12. The arm 12 is formed in a U shape by a metal plate, and is rotatably connected to the instrument body 10 at both end portions. A central portion of the arm 12 is fixed to a concrete base or the like. Note that one end of a metal wire 13 is fixed to the instrument body 10. The other end of the wire 13 is fixed to a base on which the arm 12 is fixed. That is, when the arm 12 is detached from the base, the wire 13 supports the instrument body 10, thereby preventing the instrument body 10 from falling.

1 Light source unit 3 Heat dissipation member 4 Lens block (light distribution control member)
5 Mounting member 20 Light emitting diode (solid state light emitting element)
21 Mounting board 30 Base part 52 Flange (fixed part)
53 Supporting part 503 Pressing part

Claims (7)

1 to a plurality of solid state light emitting devices, a mounting substrate on which the solid state light emitting device is mounted, a light distribution control member for controlling light distribution of light emitted from the solid state light emitting device, and the solid state light emitting device A heat dissipating member that dissipates the heat generated, and an attachment member that attaches the mounting board to the heat dissipating member,
The heat dissipating member has a base portion in contact with the back surface of the mounting substrate directly or through another member,
The mounting member includes a pressing portion that is pressed against a portion where the solid light emitting element is not mounted on the surface of the mounting substrate, a fixing portion that is fixed to the base portion, and a support that supports the light distribution control member. And a light source unit.   2. The light source unit according to claim 1, wherein the attachment member includes a plurality of the pressing portions, and each of the plurality of pressing portions is configured to surround one solid light emitting element. .   The light source unit according to claim 1, wherein the support portion is provided on an outer peripheral portion of the attachment member.   The said attachment member is formed with the material which has electrical insulation, and has a control part which controls the movement along the direction which cross | intersects the thickness direction of the said mounting substrate, The one of Claims 1-3 characterized by the above-mentioned. The light source unit according to item 1.   The mounting member includes the fixing portion screwed to the base portion and a stress relaxation portion provided around the fixing portion, and the stress relaxation portion is disposed around the fixing portion by the screwing. The light source unit according to claim 1, wherein the light source unit is configured to relieve the stress generated.   The light source according to claim 1, wherein the support portion is configured to support the light distribution control member with a gap between the support portion and the light distribution control member. unit.   An illumination fixture comprising: the light source unit according to any one of claims 1 to 6; and a fixture main body that holds the light source unit.

Images