JP5707563B2 - lighting equipment - Google Patents

Description

The present invention is related to lighting equipment to be applied to a downlight or the like to be installed embedded in embedding hole of the ceiling member.

2. Description of the Related Art Conventionally, a lens having an uneven surface at an emission part, a light emitted from the uneven surface of the emission part is reflected by a light reflecting surface member, and the light fixture is provided with the lens emitted through the light emitting surface member Is known (see, for example, Patent Document 1).
In the lens and the lighting fixture including the lens described in Patent Document 1 described above, the light emitted from the uneven surface of the light emitting portion of the lens is reflected by the light reflecting surface member and emitted through the light emitting surface member. As a result, light having luminance and no luminance unevenness can be obtained.

JP 2009-205969 A (FIG. 8, paragraphs 0031 and 0036)

By the way, the lighting fixture provided with the lens and the lens similarly to the lighting fixture provided with the lens and the lens described in patent document 1 mentioned above is proposed.
As shown in FIG. 4, in such a conventional lens and a lighting fixture including the lens, the lens 101 included in the lighting fixture 100 is formed in a hemispherical shape, and a concave space in which the LED light source 102 is accommodated at the top. 103, and the light from the LED light source 102 is emitted from a flat emission surface 104.

  However, in such a conventional lens and a lighting fixture including the lens, in the lens 101 and the lighting fixture 100, the diffused light α100 from the LED light source 102 incident on the edge of the recessed space 103 is reflected on the back side of the outer surface of the lens 101. Then, the light is refracted at the emission surface 104 and emitted. Therefore, in such a conventional lens and a lighting fixture including the lens, the lens 101 and the lighting fixture 100 emit non-control light from the emission surface 104 and irradiate the irradiation target, thereby causing annular light unevenness. Arise.

The present invention has been made in order to solve the aforementioned problems, an object thereof is to provide a luminaire Ru prevents light irregularity.

The luminaire according to the present invention includes an LED as a light source and a lens provided on a front surface of the LED, and the lens has a predetermined thickness, a flat plate portion as a bottom portion of the lens, and the flat plate portion. And projecting toward the LED from the flat plate portion, and having a projecting portion having a diameter that decreases toward the LED and that has a recess formed at the center of the top portion, In addition, a part of the LED is held in a state of entering the concave portion of the lens, and the flat plate portion of the lens faces the LED from the surface farther from the LED toward the predetermined thickness of the flat plate portion. The surface of the stepped portion is a flat surface as a light emitting surface, the flat surface as the light emitting surface and the LED in the flat plate portion. And an inclined surface provided so as to be directed toward the inside of the protruding portion of the lens as it approaches the LED, and from the LED of the inclined surface in the stepped portion. The inclination angle with respect to the surface on the far side is such that light from the LED incident on the apex, which is a connection point between the surface of the top of the projecting portion of the lens and the wall surface of the recess formed in the projecting portion. The light that has traveled in the projecting portion, reflected on the outer peripheral surface of the projecting portion, traveled in the projecting portion toward the inclined surface of the flat plate portion, and reached the inclined surface. There is reflected by the inclined surface, Ru is set to the tilt angle as to proceed to the inside of the flat plate portion continuous to the inclined surface.

A lighting fixture according to the present invention includes a plurality of lens bodies provided with a plurality of lenses, and a plurality of LEDs having the same number as the number of the lenses, corresponding to the top of each lens in the lens body, wherein the plurality of with each LED is arranged, each LED, a part of each LED, Ru is held in a state that has entered into the recess in each lens.

  According to the lens and the lighting fixture including the lens according to the present invention, it is possible to prevent light unevenness.

The vertical sectional view of the lighting fixture in the lighting fixture provided with the lens and lens of one Embodiment which concerns on this invention FIG. 1 is an external perspective view of a lens body applied to the lighting apparatus of FIG. 2 is a vertical sectional view for explaining the optical characteristics of the lens of the lens body of FIG. Vertical sectional view of a conventional lens and a lighting fixture equipped with the lens

Hereinafter, a lens according to an embodiment of the present invention and a lighting fixture including the lens will be described with reference to the drawings.
As shown in FIG. 1, in a lighting device including a lens and a lens according to an embodiment of the present invention, the lighting device 10 includes a tool body 11 that is a cylindrical housing, a plurality of LED light sources 13 and a plurality of lenses 14. In the embedded hole 2 formed in the ceiling surface 1 of a house or the like, which includes a lamp unit 12 that has an LED unit 15 that is housed in the fixture body 11, a power supply unit 16, and a power supply terminal block 17. It is attached.

  The instrument body 11 is formed in a cylindrical shape by press-molding a metal plate member or molding it using a hard resin material. The instrument main body 11 includes a partition plate 18 disposed at the center of the interior, an upper peripheral plate 19 disposed at an upper portion of the partition plate 18, and a lower peripheral plate 20 disposed at a lower portion of the partition plate 18. A power supply unit 16 is mounted on a partition plate 18 inside the upper peripheral plate 19. The partition plate 18 has a wiring hole 23 through which the instrument wiring 22 for supplying power from the power supply unit 16 to the LED substrate 21 included in the LED unit 15 is inserted.

  A bracket 24 is fixed to the upper end of the upper peripheral plate 19 with a screw 25, and a power terminal block 17 is fixed to the bracket 24 on the outside of the instrument body 11. The power supply terminal block 17 electrically connects a commercial power supply supplied from the outside to the power supply unit 16. The power supply unit 16 converts the commercial power supply into a DC power supply for the LED unit 15.

  A flange 26 is formed at the lower end of the lower peripheral plate 20. The flange 26 positions the instrument body 11 on the ceiling surface 1 by contacting the ceiling surface 1 when the instrument body 11 is inserted into the embedded hole 2. A plurality of attachment springs 27 are provided on the side of the lower peripheral plate 20. The plurality of attachment springs 27 are elastically deformed along the instrument body 11 when the instrument body 11 is inserted into the embedded hole 2 from below, and the outer diameters of the plurality of attachment springs 27 are increased after the instrument body 11 is inserted into the embedded hole 2. The instrument body 11 is held in the embedded hole 2 by being elastically restored.

  The LED unit 15 has a plurality of LED light sources 13 mounted at predetermined positions on a single LED substrate 21, and a lens body 28 having a plurality of lenses 14 corresponding to the LED light sources 13 on the front surface of the LED light source 13. Is attached. The LED light source 13 is a light source having a broad and relatively strong light distribution.

FIG. 2 shows a detailed structure of the lens body 28.
As shown in FIG. 2, the lens body 28 has seven lenses 14 formed on the inner peripheral portion of the peripheral plate 30 connected to the periphery of the bottom plate 29. The lens body 28 is molded from a polycarbonate, which is a transparent translucent member, and controls light from the LED light source 13. The lens 14 has a hemispherical protrusion 31 formed in a substantially hemispherical shape, and a recessed space 32 formed at the top of the hemispherical protrusion 31.

FIG. 3 shows the detailed structure and optical characteristics of the lens 14.
As shown in FIG. 3, the lens 14 has a flat plate portion 33 integrally formed at the bottom of the hemispherical protrusion 31, and a bottom surface formed in a convex hemispherical shape toward the LED light source 13 at the bottom of the recessed space 32. 34. The LED light source 13 is accommodated in the recessed space 32. Therefore, the LED light source 13 faces the bottom surface 34 of the recessed space 32, and the optical axis A <b> 1 of the LED light source 13 is arranged coaxially with the axis B <b> 1 of the lens 14.

  In the hemispherical protrusion 31, the lens outline 35 is formed in a substantially hemispherical shape, and the recessed space 32 is formed from the central top portion 36 toward the flat plate portion 33. The flat plate portion 33 has an emission surface 37 that is a bottom surface of the lens outer shell 35. The emission surface 37 has a planar step surface (step) 39 that is displaced from the outer peripheral end surface (outer peripheral end) 38 of the flat plate portion 33 toward the recessed space 32, and the step surface 39 and the outer peripheral end surface 38 are formed by the inclined surface 40. It is connected. The inclined surface 40 is set to a predetermined inclination angle from the stepped surface 39 side of the outer peripheral end surface 38 toward the recessed space 32 in order to reflect the diffused light α10 from the LED light source 13 toward the inside of the flat plate portion 33. Has been.

  The LED light source 13 emits light by supplying power to the LED substrate 21. Of the light from the LED light source 13, main light along the optical axis A <b> 1 of the LED light source 13 is incident on the concave space 32, refracted at the bottom surface 34 of the concave space 32, and then emitted from the step surface 39 of the emission surface 37. Is done. Of the light from the LED light source 13, the diffused light α <b> 10 incident on the central top portion 36 of the recessed space 32 is reflected on the inner surface of the hemispherical protrusion 31, guided through the lens 14, and then toward the inclined surface 40. Progress. The diffused light α10 is reflected toward the inside of the flat plate portion 33 on the inclined surface 40. Therefore, non-control light such as diffused light α10 incident on the edge of the concave space 32 is not irradiated toward the irradiation target.

As described above, in the lens according to the embodiment of the present invention and the lighting fixture including the lens, the lens 14 has the inclined surface 40 connecting the step surface 39 provided on the front surface of the LED light source 13 and the outer peripheral end surface 38. In addition, among the light from the LED light source 13, the diffused light α <b> 10 incident on the central top portion 36 of the recessed space 32 is reflected toward the inside of the flat plate portion 33 on the inclined surface 40.
Therefore, the lens 14 of the embodiment according to the present invention and the lighting fixture including the lens can prevent unevenness in light because the non-control light is not irradiated toward the irradiation target.

In the illuminating device 10 including the lens and the lens according to the embodiment of the present invention, the illuminating device 10 is applied with the lens 14 that is not irradiated with the non-control light toward the irradiation target.
Therefore, the luminaire 10 according to the embodiment of the present invention and the luminaire including the lens can provide the luminaire 10 that can prevent uneven light.

  In addition, in the lighting fixture provided with the lens and lens of this invention, the lens 14 and the lighting fixture 10 are not limited to embodiment mentioned above, A suitable deformation | transformation, improvement, etc. are possible.

DESCRIPTION OF SYMBOLS 10 Lighting fixture 13 LED light source 14 Lens 38 Outer peripheral end face (outer peripheral end)
39 Step surface (step)
40 Inclined surface

Claims (2)

An LED as a light source ;
A lens provided in front of the LED ;
Have
The lens is
A flat plate portion as a bottom portion of the lens having a predetermined thickness;
A projecting portion that is continuous with the flat plate portion and protrudes from the flat plate portion toward the LED, has a diameter that decreases toward the LED, and has a recess formed at the center of the top portion;
Have
The LED is held in a state where a part of the LED enters the concave portion of the lens,
The flat plate portion of the lens is
From the surface far from the LED toward the LED, having a stepped portion that is recessed at a height not exceeding the predetermined thickness of the flat plate portion,
The surface of the stepped portion is
A plane as a light exit surface;
Connecting the flat surface as the light exit surface and the surface of the flat plate portion on the side far from the LED, and as it approaches the LED, an inclined surface is provided so as to be directed to the inside of the protruding portion of the lens;
Consists of
And the inclination angle of the inclined surface of the stepped portion with respect to the surface far from the LED is the surface of the top portion of the protruding portion of the lens and the wall surface of the concave portion formed in the protruding portion. Light from the LED incident on the apex, which is a connection point, travels in the projecting portion, is reflected by the outer peripheral surface of the projecting portion, and travels in the projecting portion toward the inclined surface of the flat plate portion. Then, when the light reaches the inclined surface, the illuminating device is set to an inclination angle such that the reached light is reflected by the inclined surface and proceeds to the inside of the flat plate portion continuing to the inclined surface . The lighting fixture according to claim 1,
A lens body provided with a plurality of the lenses;
A plurality of the LEDs, the same number as the number of the lenses,
Corresponding to the top portion of each lens in the lens body illumination, with each of the plurality of LED are arranged, each LED, a part of each LED, which is held in a state that has entered into the recess in each lens Instruments.

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