JP5857262B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting fixture.

  Conventionally, a light source device using a lens has been provided (see, for example, Patent Document 1). The light source device includes a light source unit that emits light and a convex lens that is disposed in front of the light source unit and controls light distribution of the light emitted from the light source unit. The outer periphery of the convex lens is formed outside the optical axis of the convex lens with respect to the optical axis of the convex lens from the position where the incident angle of the light emitted from the light source unit with the outside air forms a critical angle. Since the ratio of the reflected light is reduced, the emission efficiency of the light source device can be improved.

JP 2006-196320 A (paragraph [0016] -paragraph [0022] and FIG. 1)

  In the light source device described in Patent Document 1, although the emission efficiency can be improved, there is a problem that the shape of the convex lens is increased, and accordingly, the entire light source device is increased in size.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a small luminaire with improved emission efficiency.

  The luminaire of the present invention includes a light source and an optical member that is disposed in front of the light source and controls light distribution from the light source. The optical member includes a lens portion provided with a housing concave portion for housing the light source in a portion facing the light source, and a rib for fixing the lens portion to the substrate that extends laterally from the lens portion and on which the light source is mounted. . The lens unit is provided with a light distribution control unit that distributes light from the light source radiated toward the rib to the front side at the opening edge of the rear surface side of the housing recess.

  In this luminaire, the light sources are arranged in at least two rows at a predetermined interval, and the optical member has a connecting portion that connects between the lens portions provided in a manner corresponding to the light sources arranged in each row. The light distribution control unit preferably distributes the light from the light source emitted toward the connection unit to the front side.

  Moreover, in this lighting fixture, it is also preferable that the light distribution control unit includes a chamfered portion provided at the opening edge by chamfering.

  Furthermore, in this lighting apparatus, it is preferable that the light distribution control unit is composed of a convex portion provided at the opening edge.

  Moreover, in this lighting fixture, it is also preferable that the light source and the lens portion are arranged in an annular shape.

  There is an effect that it is possible to provide a small luminaire with improved emission efficiency.

It is a principal part enlarged view of the lighting fixture of this embodiment. It is an exploded perspective view same as the above. (A) is the same external perspective view seen from the front side, (b) is the same external perspective view seen from the rear side. (A) is a light distribution characteristic diagram when the light distribution control unit is provided in the optical member constituting the above, and (b) is a light distribution characteristic diagram when the light distribution control unit is not provided in the optical member constituting the same. It is. It is sectional drawing which represented typically the other example of the light distribution control part provided in the optical member which comprises the same as the above.

  Embodiment of a lighting fixture is described based on drawing. The lighting fixture of this embodiment is, for example, a ceiling light, and is used to illuminate the entire room by being directly attached to the ceiling. In the following description, a ceiling light will be described as an example, but the present lighting fixture is not limited to a ceiling light, and may be another lighting fixture.

  FIG. 2 is an exploded perspective view illustrating an example of the lighting fixture A of the present embodiment. The lighting fixture A includes a fixture main body 1 formed in a disk shape and a power feeding unit 5 disposed at the center of the fixture main body 1. And the light emitting unit 2 arranged in an annular shape around the power feeding unit 5. The luminaire A is disposed in front of the light emitting unit 2, the optical member 3 that controls the light distribution of the light emitted from the light emitting unit 2, the front of the optical member 3, and the light distribution control by the optical member 3. And a diffusing member 4 for diffusing the light from the light emitting unit 2.

  The light emitting unit 2 includes a plurality of (four in FIG. 2) mounting substrates 21 that are curved in an arc shape, and a plurality of LEDs (light emitting diodes) 22 are provided on one surface (the upper surface in FIG. 2) of each mounting substrate 21. Are mounted in two rows in the width direction of the mounting substrate 21 and along the longitudinal direction of the mounting substrate 21. As shown in FIG. 2, these mounting boards 21 are arranged in an annular shape around a power feeding unit 5 arranged at the center of the instrument main body 1, and are attached to the instrument main body 1 using, for example, mounting screws (not shown). It is attached. Here, in the present embodiment, a light source is constituted by a plurality of LEDs 22.

  The power feeding unit 5 generates lighting power for lighting the plurality of LEDs 22 mounted on the mounting board 21, and supplies the generated lighting power to each mounting board 21 via an electric wire (not shown). Specifically, the power supply unit 5 converts an AC voltage supplied from an external power source (not shown) into a DC voltage having a desired voltage value (a voltage value necessary for lighting the LED 22), and converts the converted DC voltage. A voltage is supplied to each mounting substrate 21. In addition, this electric power feeding part 5 is attached to the instrument main body 1 using an attachment screw (not shown), for example.

  The diffusing member 4 is formed in a dome shape with one surface (the lower surface in FIG. 2) opened by milky white acrylic resin to which a light diffusing agent is added, for example, and is detachably attached to the instrument body 1 from the front of the optical member 3. .

  The optical member 3 is made of a light-transmitting material (for example, acrylic resin, polycarbonate resin, glass, etc.), and has a disc-shaped main body 31 having a circular opening 31a formed at the center. On one surface of the main body 31 (upper surface in FIG. 2), as shown in FIGS. 1 and 2, lens portions 32 and 33 that are convex forward (upper in FIG. 1) are provided in two rows concentrically. ing. Here, in the present embodiment, the lens unit 32 is provided in a form corresponding to the LED 22 mounted on the inner side (the power feeding unit 5 side) of each mounting substrate 21, and the outer side (the side opposite to the power feeding unit 5) of each mounting substrate 21. The lens portion 33 is provided in a form corresponding to the LED 22 mounted on the).

  In addition, a connecting portion 35 that connects the lens portions 32 and 33 is integrally provided between the lens portion 32 and the lens portion 33 in the radial direction of the instrument body 1 (left and right direction in FIG. 1). . Further, a rib 34 for fixing the lens portions 32, 33 to the mounting substrate 21 is integrally provided at a portion opposite to the connecting portion 35 of the lens portions 32, 33 in the radial direction. In addition, circular storage recesses 32a and 33a for storing the corresponding LEDs 22 are provided on the rear surface side (the lower surface side in FIG. 1) of the lens portions 32 and 33, respectively. Furthermore, chamfered portions 32b and 33b formed by chamfering are provided at the opening edges of the housing recesses 32a and 33a of the lens portions 32 and 33, respectively. In addition, it is desirable to provide these chamfered portions 32b and 33b so that the upper end edge thereof is located above the upper end surface (that is, the light emitting surface) of the LED 22.

  Next, the assembly procedure of the lighting fixture A will be described. The operator attaches the power feeding unit 5 to the center of the instrument body 1 and attaches the mounting substrate 21 to one surface (the upper surface in FIG. 2) of the instrument body 1, and then between the power feeding unit 5 and each mounting substrate 21. Are electrically connected using an electric wire (not shown). After that, the operator attaches the optical member 3 to the fixture body 1 from the front so as to cover each mounting substrate 21, and then attaches the diffusion member 4 to the fixture body 1 from the front, thereby completing the assembly of the lighting fixture A. (See FIGS. 3A and 3B).

  And by attaching the hook connector 6 (refer FIG.3 (b)) integrally provided in the rear surface side of the electric power feeding part 5 to the hook ceiling (not shown) provided in the ceiling, the lighting fixture A of FIG. Construction is complete.

  4A is a light distribution characteristic diagram when the chamfered portion 32b is provided at the opening edge of the housing recess 32a of the lens portion 32, and FIG. 4B is a case where the chamfered portion 32b is not provided. FIG. In the case of FIG. 4B, the light emitted from the LED 22 is incident on the lens portion 32 and also on the rib 34 and the connecting portion 35, and the light incident on the lens portion 32 is emitted radially. . In addition, the light incident on the ribs 34 and the connecting portions 35 is totally reflected on the front surfaces (upper surfaces) of the ribs 34 and the connecting portions 35, and thus is not emitted outside. That is, the light emission efficiency decreases accordingly.

  On the other hand, in the case of FIG. 4A, the light emitted from the LED 22 is incident on the lens portion 32, but the light emitted toward the rib 34 and the connecting portion 35 is partially chamfered 32b. The light is refracted by the light and distributed to the front side. That is, in this case, the amount of light emitted to the front side through the lens unit 32 can be increased. Since the lens unit 33 is the same as the lens unit 32 described above, the description of the lens unit 33 is omitted here. Here, in the present embodiment, the light distribution control unit is configured by the chamfered portions 32b and 33b.

  FIG. 5 is a cross-sectional view schematically showing another example of the light distribution control unit. In the example shown in FIG. 1, the light distribution control unit is configured by a chamfered portion 32b provided at the opening edge of the storage recess 32a. However, in this example, the light distribution control unit is configured by a convex portion (for example, an R curved surface) 32c provided at the opening edge of the housing concave portion 32a. Also in this case, the light emitted from the LED 22 toward the rib 34 and the connecting portion 35 is refracted by the convex portion 32c and distributed to the front side, so that the amount of light emitted to the front side through the lens portion 32 is reduced. Can be increased. In addition, as for the convex part 32c, it is desirable for the curvature radius R1 to be larger than the thickness dimension D1 of LED22. Since the lens unit 33 is the same as the lens unit 32 described above, the description of the lens unit 33 is omitted here.

  Thus, according to the present embodiment, the light from the LED 22 radiated toward the rib 34 and the connecting portion 35 can be distributed to the front side by the chamfered portions 32b and 33b and the convex portions 32c and 33c. As a result, it is possible to provide the lighting apparatus A with improved emission efficiency. Moreover, since it is not necessary to enlarge the lens parts 32 and 33 like a prior art example, the small illuminating device A can be provided. Furthermore, according to this embodiment, a light distribution control unit can be realized with a simple configuration such as the chamfered portions 32b and 33b and the convex portions 32c and 33c. Further, as in the present embodiment, when the LED 22 and the lens portions 32 and 33 are arranged in an annular shape, the light emitted from the LED 22 is irradiated substantially uniformly onto the surface to be irradiated (for example, an indoor floor surface). be able to.

  In the present embodiment, the light distribution control unit is configured by the chamfered portions 32b and 33b and the convex portions 32c and 33c. However, the light distribution control unit is not limited to the present embodiment, and the rib 34 and the connecting portion. Any shape that can distribute light from the LED 22 radiated toward the front side 35 to the front side is acceptable. Further, the light source is not limited to the LED 22, and may be, for example, an organic EL. Furthermore, in this embodiment, although the case where LED22 was arrange | positioned at 2 rows was demonstrated to the example, for example, 1 row may be sufficient and 3 rows or more may be sufficient. Further, the arrangement of the LED 22 and the lens portions 32 and 33 is not limited to an annular shape, and may be, for example, a square annular shape or a linear shape.

3 Optical member 21 Mounting substrate (substrate)
22 LED (light source)
32, 33 Lens portion 32a, 33a Storage recess 32b, 33b Chamfered portion (light distribution control portion)
34 Rib A Lighting equipment

Claims (5)

A light source;
An optical member disposed in front of the light source to control light distribution from the light source;
The optical member fixes the lens unit to a lens unit provided with a storage recess for storing the light source in a portion facing the light source, and a substrate that extends laterally from the lens unit and on which the light source is mounted. And a rib for
The lens unit is provided with a light distribution control unit that distributes light from the light source radiated toward the rib to a front surface side at an opening edge on a rear surface side of the housing recess. Lighting equipment to do. The light sources are arranged in at least two rows at a predetermined interval,
The optical member has a connecting portion that connects between the lens portions provided in a shape corresponding to the light sources arranged in each row,
The lighting device according to claim 1, wherein the light distribution control unit distributes light from the light source emitted toward the connection unit to a front side.   The lighting device according to claim 1, wherein the light distribution control unit includes a chamfered portion provided at an edge of the opening by chamfering.   The lighting device according to claim 1, wherein the light distribution control unit includes a convex portion provided at an edge of the opening.   The lighting apparatus according to claim 1, wherein the light source and the lens unit are arranged in an annular shape.

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