JP6575906B2 - Lens unit and lighting fixture - Google Patents

Description

  The present invention relates to a lens unit and a lighting fixture, and more particularly to a lens unit that controls the light distribution of light emitted from a light source and a lighting fixture having the lens unit.

  As a conventional example, a lens unit and a lighting fixture described in Patent Document 1 are illustrated. The luminaire described in Patent Document 1 is a luminaire (road light, street light, security light, etc.) used for road illumination. Such a luminaire is attached to the tip of a lighting pole standing along the road, and has more light in the longitudinal direction of the road (the direction in which people and vehicles come and go) than the width direction of the road. It is configured to distribute (visible light). Therefore, the lighting fixture described in Patent Document 1 includes a lens unit for realizing the above-described light distribution characteristics.

  The lighting fixture described in Patent Literature 1 includes an LED substrate on which a plurality of LED light sources are mounted on one surface, and a plurality of lens units that are attached to the LED substrate so as to cover the LED light sources. These lens units are attached to the heat radiating plate together with the LED substrate by using attachment screws.

JP 2012-145904 A

  By the way, in the conventional example, a tool such as a screwdriver is required for screwing the lens unit together with the LED substrate to the heat sink. On the other hand, further simplification of the assembly operation of the lens unit is required.

  The present invention has been made in view of the above problems, and an object thereof is to simplify assembly work.

The lens unit of the present invention is a lens unit that is attached to a substrate on which one or a plurality of solid state light emitting elements are mounted on a first surface, and is provided with a plate-like base portion and the solid portion provided on the base portion. One or more lenses for refracting light emitted from the light emitting element, and a plurality of attachment portions for attaching the base portion to the substrate so that the lens covers the solid light emitting element. The plurality of attachment portions each include a deflectable bending piece provided on the base portion and a protrusion provided on the bending piece and hooked on the substrate, and the bending piece is U-shaped. It is formed on the rear end portion of the bending piece connected to the base portion, projecting on the same side as the lens along the thickness direction of the base portion, this configured to wrap in a direction away from said base portion The features.

  The lighting fixture of the present invention includes a light source configured by mounting one or a plurality of solid state light emitting elements on a substrate, a lens unit, and a fixture main body that supports the light source and the lens unit. .

  The lens unit and the lighting fixture of the present invention have an effect that the assembling work can be simplified.

The lens unit which concerns on embodiment is shown, FIG. 1A is a front view, FIG. 1B is a left view, FIG. 1C is a top view. FIG. 2A is a perspective view seen from the front, and FIG. 2B is a perspective view seen from the rear, showing a light source block to which the lens unit according to the embodiment is attached. It is a disassembled perspective view which shows the lens unit and light source block which concern on embodiment. 4A to 4G are front views of a lens unit according to an embodiment having lenses having different light distribution characteristics. It is a perspective view of the lighting fixture which concerns on embodiment. The lighting fixture which concerns on embodiment is shown, FIG. 6A is a front view, FIG. 6B is a left view, FIG. 6C is a rear view. It is a front view of the lighting fixture which concerns on another embodiment.

  Hereinafter, the lens unit 1 according to the present embodiment and the lighting fixture 4 according to the present embodiment will be described in detail with reference to the drawings. The configurations described in the following embodiments are merely examples of the present invention. The present invention is not limited to the following embodiments, and various modifications can be made according to the design and the like as long as they do not depart from the technical idea of the present invention.

  As shown in FIGS. 1A to 1C, the lens unit 1 according to the present embodiment includes a base portion 10, a plurality (30 in the illustrated example) lenses 11, and a plurality (four in the illustrated example) mounting portions. Twelve. The base portion 10 is formed in a substantially rectangular flat plate shape. However, the four corners of the base portion 10 are preferably formed in a curved shape when viewed from the thickness direction of the base portion 10. In addition, the base portion 10 is provided with protrusions 100 and 101 on two side surfaces along the longitudinal direction, respectively. One protrusion (hereinafter also referred to as a first protrusion) 100 is formed in a trapezoidal shape when viewed from the thickness direction of the base portion 10 (see FIG. 1A). The other protrusion (hereinafter also referred to as a second protrusion) 101 is formed in a rectangular shape when viewed from the thickness direction of the base portion 10. Note that columnar positioning portions 102 are provided on the back surfaces of the first protrusion 100 and the second protrusion 101, respectively (see FIGS. 1B and 1C).

  As shown in FIG. 1A, the plurality of lenses 11 have, for example, a dome shape, and are provided on the surface of the base portion 10 so as to be arranged vertically and horizontally. However, the thirty lenses 11 are arranged on the surface of the base portion 10 so that six lenses are arranged vertically in one row and five rows are arranged in parallel at equal intervals. Further, the six lenses 11 in each row are arranged at equal intervals. These lenses 11 are formed in a dome-like shape in which a spheroid is roughly divided in half along the major axis. In this embodiment, the lens shape is a dome shape. However, the shape is not limited to this and may be a hemispherical shape.

  Two each of the four attachment portions 12 are provided approximately at the center of the two side surfaces along the short direction of the base portion 10. The attaching part 12 has a substantially U-shaped bending piece 120 and a protrusion 121 protruding from the tip of the bending piece 120 toward the base part 10 (see FIG. 1B). The bending piece 120 is connected to the base portion 10 at the rear end portion, protrudes to the same side as the lens 11 along the thickness direction of the base portion 10, and is folded back in a direction away from the base portion 10. Moreover, the front-end | tip of the bending piece 120 is located ahead of the back surface of the base part 10 along the normal line direction of the back surface of the base part 10 (refer FIG. 1B). The protrusion 121 is formed in a substantially triangular prism shape. Further, the protrusion 121 is configured to increase the amount of protrusion from the flexible piece 120 as it approaches the base part 10 from the side surface on the base part 10 side at the tip of the flexible piece 120 (see FIG. 1B).

  Here, components such as the base portion 10, the lens 11, and the mounting portion 12 of the lens unit 1 are integrally formed as a molded body of a synthetic resin material having translucency and elasticity such as polycarbonate resin and acrylic resin. Is preferred. However, in the lens unit 1, components other than the attachment portion 12 may be made of glass (for example, quartz glass).

  The lens unit 1 configured as described above is attached to the substrate 20 of the light source block 2 as shown in FIGS. 2A and 2B. The light source block 2 includes a substrate 20 formed in a long rectangular plate shape, and a plurality of solid light emitting elements (hereinafter referred to as LED <light emitting diode> 21) mounted on the surface of the substrate 20 (FIG. 3). reference). The LED 21 is, for example, a package type light emitting diode that emits white light. However, the LED 21 may be a COB (chip on board) type light emitting diode. The substrate 20 is preferably made of a substrate material with good heat dissipation, such as an aluminum substrate. A large number of LEDs 21 are mounted on the surface of the substrate 20 at regular intervals in the vertical and horizontal directions. However, the substrate 20 is divided into a plurality (four in the illustrated example) of regions 22 (see FIG. 3). In each region 22 (hereinafter also referred to as a first region 22A, a second region 22B, a third region 22C, and a fourth region 22D), the same number (30) of LEDs 21 as the lens 11 of the lens unit 1 are provided. Are mounted side by side at the same interval and arrangement as the lens 11 (see FIG. 3). In addition, on the surface of the substrate 20, surface-mounted electronic components 23 such as a chip resistor and a chip capacitor are mounted between adjacent LEDs 21. The plurality of LEDs 21 and electronic components 23 in each region 22 are electrically connected to each other by, for example, a conductor (for example, copper foil) formed on the surface of each region 22 of the substrate 20. Further, in each of these four regions 22A to 22D, there are two positioning holes 200 for fitting the positioning portions 102 provided on the first protrusion 100 and the second protrusion 101 of the lens unit 1, respectively. (See FIGS. 2B and 3).

  Next, an operation for attaching the lens unit 1 to the substrate 20 of the light source block 2 (attachment operation) will be described. For example, after the lens unit 1 is put on the surface of the first region 22A, the operator pushes the central portion (curved portion) of the bending piece 120 of the mounting portion 12 from the front to the rear using the hand. Then, when the protrusion 121 of the mounting portion 12 receives a force outward (in a direction away from the substrate 20) from the end portion of the substrate 20, the bending piece 120 is bent. And if the protrusion 121 gets over the edge part of the board | substrate 20 and receives no outward force from the edge part of the board | substrate 20, the bending piece 120 will return to the original state (state before bending). As a result, since the projection 121 is caught on the back surface of the end portion of the substrate 20, the lens unit 1 is attached to the substrate 20 so as to sandwich the substrate 20 between the base portion 10 and the projection 121 (FIGS. 2A and 2B). reference). When the lens unit 1 is attached to the substrate 20 (the first region 22A), the first protrusion of the lens unit 1 is inserted into the two holes 200 provided in the substrate 20 (the first region 22A). 100 and the positioning part 102 of the 2nd protrusion 101 are each fitted. Therefore, the lens unit 1 positions the plurality of lenses 11 with respect to the individual LEDs 21 mounted on the surface of the substrate 20 by fitting the two positioning portions 102 into the holes 200 of the substrate 20, respectively. be able to. If the operator puts a finger on the protrusion 121 and pulls it outward (in a direction away from the substrate 20) to bend the bending piece 120 and release the catch between the protrusion 121 and the end of the substrate 20, The lens unit 1 can be removed from the lens 20.

  As described above, the lens unit 1 according to the present embodiment is attached to the substrate 20 with only the operator's fingers without a tool such as a driver. Therefore, the lens unit 1 according to this embodiment can simplify the assembling work as compared with the lens unit having a structure that is screwed to the substrate.

  By the way, the lens 11 of the lens unit 1 according to the present embodiment is not limited to the configuration illustrated in FIGS. 1A to 1C, and may be configured as illustrated in FIGS. 4A to 4G, for example. The lens units 1 shown in FIGS. 4A to 4G are configured to realize different light distribution characteristics. Therefore, the light source block 2 can easily realize various light distribution characteristics according to the type of the lens unit 1 attached to the substrate 20 (region 22 thereof).

  Next, the lighting fixture 4 which concerns on this embodiment is demonstrated. The lighting fixture 4 which concerns on this embodiment is a lighting fixture (road light) used for road lighting. However, the lighting fixture 4 according to the present embodiment is not limited to a road light, and may be a security light or a street light, for example.

  As shown in FIGS. 5 and 6A to 6C, the lighting fixture 4 according to the present embodiment preferably includes two light source units 3, a fixture body 40, and an adapter 41. The adapter 41 is a component for mechanically connecting the instrument body 40 to the lighting pole 6.

  The light source unit 3 includes a light source block 2, four lens units 1 attached to the substrate 20 of the light source block 2, a housing 30 that houses the light source block 2 and the lens unit 1, and a panel 31. The housing 30 is formed in a flat rectangular box shape with a metal material (for example, aluminum or aluminum alloy), and the substrate 20 of the light source block 2 is attached to the bottom plate (see FIG. 6A). The panel 31 is formed in the shape of a rectangular flat plate made of a synthetic resin material having translucency such as polycarbonate resin or glass. The panel 31 is attached to the housing 30 so as to close the opening of the housing 30. That is, the light emitted from the light source block 2 is subjected to light distribution control by the lens unit 1 and then irradiated to the illumination space through the panel 31.

  As shown in FIGS. 6A to 6C, the instrument main body 40 includes a body 400, a first cover 401, a second cover 402, two support fittings 403, and the like. The body 400 is formed in a flat box shape whose upper surface is opened by aluminum die casting. The body 400 is divided into two spaces along the longitudinal direction, the power supply unit is accommodated in the first space, and the terminal block is accommodated in the second space. The terminal block is electrically connected to a power supply line that rises and is wired in the illumination pole 6. The power supply unit is electrically connected to the power supply line via the terminal block. The power supply unit is configured to convert AC power supplied from a power system (commercial AC power supply) via a power supply line into DC power, and supply the DC power to the two light source units 3 respectively.

  The first cover 401 is formed in a flat box shape whose bottom surface is opened by aluminum die casting, and is attached to the body 400 so as to close the opening of the first space. The second cover 402 is formed in a flat box shape whose lower surface is opened by aluminum die casting, and is attached to the body 400 so as to close the opening of the second space (see FIGS. 6B and 6C).

  The two support fittings 403 are attached to the lower surface of the instrument main body 40 (the body 400 thereof) so as to be arranged at intervals in the longitudinal direction of the body 400 (see FIG. 6B). And these two support metal fittings 403 are comprised so that each may support the both ends along the transversal direction in the housing | casing 30 of the two light source units 3 (refer FIG. 6A-FIG. 6C). However, it is preferable that the two support fittings 403 are configured to provide a space between the instrument body 40 and the light source unit 3 (see FIG. 6B). Thus, by providing a space between the instrument main body 40 and the light source unit 3, the heat dissipation of the light source unit 3 can be improved.

  In the lighting fixture 4 according to the present embodiment, the lens units 1 of the two light source units 3 may be the same type of lens unit 1 having the same lens 11, or different types of lens units 1 of the respective light source units 3 having different lenses 11. The lens unit 1 may be used. That is, one lighting fixture 4 may include a plurality of light source units 3 having different light distribution characteristics. If the lighting fixture 4 which concerns on this embodiment is comprised as mentioned above, compared with the case where two or more lighting fixtures from which a light distribution characteristic differs are installed, the reduction of the expense which road illumination requires can be aimed at.

  Here, the lighting fixture 5 which concerns on another embodiment is shown in FIG. This lighting fixture 5 is a lighting fixture (tunnel lamp) used for tunnel lighting. The lighting fixture 5 includes a fixture main body 50 formed in a flat box shape, two light source blocks 2 housed in the fixture main body 50, a lighting device that lights the two light source blocks 2, and the like. The front surface of the instrument body 50 is closed with a cover 51 formed in a plate shape with a light-transmitting material such as polycarbonate resin or glass. The cover 51 is rotatably attached to the instrument body 50 by a pair of hinges 52. The lighting fixture 5 configured as described above is installed on an inner wall surface of a tunnel or the like using a mounting bracket 53 attached to the back surface of the fixture main body 50. In the lighting fixture 5 according to the present embodiment, the lens unit 1 combined with the two light source blocks 2 may be the same type of lens unit 1 having the same lens 11. Further, the lens unit 1 combined with each light source block 2 may be another type of lens unit 1 having a different lens 11.

  As described above, the lens unit 1 according to the present embodiment is a lens unit that is attached to the substrate 20 on which one or a plurality of solid state light emitting elements (LEDs 21) are mounted on the first surface. The lens unit 1 according to this embodiment includes a plate-like base portion 10 and one or a plurality of lenses 11 that are provided on the base portion 10 and refract light emitted from the LEDs 21. Furthermore, the lens unit 1 according to the present embodiment includes a plurality of attachment portions 12 for attaching the base portion 10 to the substrate 20 so that the lens 11 covers the LEDs 21. The plurality of attachment portions 12 each include a deflectable bending piece 120 provided on the base portion 10 and a protrusion 121 provided on the bending piece 120 and hooked on the substrate 20.

  If the lens unit 1 according to the present embodiment is configured as described above, the lens unit 1 can be easily attached to the substrate 20 without using a tool such as a driver. Therefore, the lens unit 1 according to the present embodiment can simplify the assembly work as compared with the case where the lens unit 1 is screwed to the substrate as in the conventional example.

  In the lens unit 1 according to the present embodiment, it is preferable that a positioning portion 102 for positioning the lens 11 with respect to the LED 21 is provided in the base portion 10.

  If the lens unit 1 according to the present embodiment is configured as described above, it is possible to suppress a shift in the relative positional relationship between the lens 11 and the LED 21 and achieve a desired light distribution characteristic.

  Furthermore, in the lens unit 1 according to the present embodiment, it is preferable that a plurality of lenses 11 are provided on the base portion 10. The plurality of lenses 11 preferably include a plurality of types of lenses 11 having different light distribution characteristics.

  If the lens unit 1 according to the present embodiment is configured as described above, light distribution characteristics different from each other can be realized while ensuring ease of attachment to the substrate 20.

  In addition, as described above, the lighting fixtures 4 and 5 according to the present embodiment include a light source (light source block 2) configured by mounting one or a plurality of LEDs 21 on the substrate 20, the lens unit 1, and the light source block 2. And instrument bodies 40 and 50 that support the lens unit 1.

  Since the lighting fixtures 4 and 5 according to the present embodiment are configured as described above, the assembling work can be simplified as compared with the case where the lens unit is screwed to the substrate as in the conventional example. .

  Moreover, in the lighting fixtures 4 and 5 which concern on this embodiment, it is preferable to provide the some lens unit 1 from which a light distribution characteristic differs, respectively.

  If the lighting fixtures 4 and 5 which concern on this embodiment are comprised as mentioned above, compared with the case where two or more lighting fixtures from which a light distribution characteristic differs are installed, the reduction of the expense which road illumination requires can be aimed at.

1 Lens unit 2 Light source block (light source)
DESCRIPTION OF SYMBOLS 4 Lighting fixture 5 Lighting fixture 10 Base part 11 Lens 12 Mounting part 20 Board | substrate 21 LED (solid light emitting element)
40 Instrument body 50 Instrument body 102 Positioning part 120 Deflection piece 121 Protrusion

Claims (5)

A lens unit attached to a substrate on which one or more solid state light emitting devices are mounted on a first surface,
A plate-like base,
One or more lenses provided on the base portion to refract the light emitted from the solid state light emitting device;
A plurality of attachment portions for attaching the base portion to the substrate so that the lens covers the solid-state light-emitting element;
The plurality of attachment portions each include a deflectable bending piece provided on the base portion, and a protrusion provided on the bending piece and hooked on the substrate ,
The flexure piece is formed in a U shape, a rear end portion of the flexure piece is connected to the base portion, protrudes to the same side as the lens along the thickness direction of the base portion, and away from the base portion. A lens unit configured to be folded .   The lens unit according to claim 1, wherein a positioning portion that positions the lens with respect to the solid-state light emitting element is provided in the base portion.   The lens unit according to claim 1, wherein a plurality of the lenses are provided in the base portion, and the plurality of lenses include a plurality of types of lenses having different light distribution characteristics.   A light source configured by mounting one or a plurality of solid-state light emitting elements on a substrate, the lens unit according to any one of claims 1 to 3, and an instrument body that supports the light source and the lens unit. Lighting equipment characterized by   The lighting fixture according to claim 4, further comprising a plurality of the lens units each having a different light distribution characteristic.

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