JP2016066412A - Lamp device and luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lamp device capable of performing irradiation with light having an irradiation pattern with a distinct light-shade border.SOLUTION: A casing 11 has a recessed part 21 which is open at one end side. A light emission module 12 has a substrate 30 and a light emission element 31 mounted on the substrate 30, and is arranged at the recessed part 21. A lens 13 is arranged at the recessed part 21. The lens 13 has an incidence surface 42 on which light from the light emission element 31 is made incident, an emission surface 43 provided on the opposite side from the incidence surface 42, a first reflective surface 44 arranged opposite the incidence surface 42 and reflecting light made incident from the incidence surface 42 toward a periphery of the incidence surface 42, and a second reflective surface 45 arranged at the periphery of the incidence surface 42 and reflecting light reflected by the first reflective surface 44 toward the emission surface 43. The first reflective surface 44 is hollowed at its center part to be closer to the incidence surface 42, and the emission surface 43 is inclined at its peripheral part to be closer to the second reflective surface 45. A cover 14 is annular, and fitted to the casing 11 to hold the lens 13 with the casing 11.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a lamp device including a lens, and an illumination device using the lamp device.

  2. Description of the Related Art Conventionally, there is a lamp device that uses a light emitting element and a lens that controls light distribution by entering light from the light emitting element.

  As a lens, a double reflection type lens that is thin and capable of narrowing the light distribution is known. This double-reflective lens is made up of an incident surface on which light from a light emitting element is incident, an exit surface provided on the opposite side of the incident surface, and light incident on the incident surface disposed opposite to the incident surface to the periphery of the incident surface. And a second reflecting surface that is disposed around the incident surface and reflects light reflected by the first reflecting surface toward the exit surface.

JP 2013-134985 A

  In the case of a double-reflective lens, it is possible to narrow the light distribution with a thin lens, but it is desired to be able to irradiate light with an illumination pattern with a clear boundary between light and dark.

  The problem to be solved by the present invention is to provide a lamp device capable of irradiating light of an irradiation pattern with a clear boundary between light and dark, and an illumination device using the lamp device.

  The lamp device according to the embodiment includes a housing, a light emitting module, a lens, a power feeding unit, and a lighting circuit. The housing has a recess opening on one end side. The light emitting module has a substrate and a light emitting element mounted on the substrate, and is disposed in the recess. The lens is disposed in the recess. The lens includes an incident surface on which light from the light emitting element is incident, an exit surface provided on the opposite side of the incident surface, and a first surface that is disposed opposite to the incident surface and reflects light incident from the incident surface toward the periphery of the incident surface. And a second reflecting surface that is disposed around the incident surface and reflects light reflected by the first reflecting surface toward the exit surface. The central portion of the first reflecting surface is recessed so as to approach the incident surface, and the peripheral portion of the emitting surface is inclined so as to approach the second reflecting surface. The cover is annular, and is attached to the casing with a lens sandwiched between the cover and the casing. The power feeding unit is disposed on the other end side of the housing. The lighting circuit is disposed in the housing.

  According to the present invention, it can be expected to irradiate light having an irradiation pattern with a clear boundary between light and dark.

It is sectional drawing of the lamp device which shows 1st Embodiment. It is a perspective view of a lamp device same as the above. It is sectional drawing of the illuminating device using a lamp device same as the above. The light distribution of the lens of a lamp apparatus same as the above is shown, (a) is explanatory drawing which shows the light distribution of the lens of this embodiment, (b) is explanatory drawing which shows the light distribution of the lens of a comparative example. It is a graph which shows the light distribution of the lens of this embodiment same as the above, and the lens of a comparative example. It is sectional drawing of the lamp device which shows 2nd Embodiment.

  Hereinafter, the first embodiment will be described with reference to FIGS. 1 to 5.

  1 and 2 show a lamp device 10 which is a light bulb shaped lamp. The lamp device 10 includes a housing 11, and further includes a light emitting module 12, a lens 13 and a cover 14 disposed on one end side of the housing 11 (one end side in the central axis direction of the lamp device 10). A case 15 disposed on the other end side of the housing 11, a base 16 as a power feeding unit, and a lighting circuit 17 are provided.

  The housing 11 is integrally formed of a metal material such as aluminum. On one end side of the housing 11, a substantially hemispherical main body portion 19 is formed that expands toward one end side, and on the other end side of the housing 11, a cylindrical portion 20 that opens toward the other end side is formed. Is formed. The casing 11 is formed to approximate the shape of a so-called reflex lamp.

  A recess (first recess) 21 that opens to one end of the housing 11 is formed on one end of the housing 11. On the other end side of the housing 11, a recess (second recess) 22 that opens to the other end side of the housing 11 is formed. A partition 23 is formed between the recesses 21 and 22. A mounting surface 24 for mounting the light emitting module 12 projects from the inner periphery of the recess 21. A wiring hole 25 through which wiring for electrically connecting the light emitting module 12 and the lighting circuit 17 is formed in the partition portion 23.

  A lens attachment portion 26 for attaching the lens 13 is formed on the inner peripheral side of one end portion of the housing 11. A cover attaching portion 27 for attaching the cover 14 is formed on the outer peripheral side of one end portion of the housing 11.

  The light emitting module 12 includes a substrate 30 and a light emitting element 31 mounted on the substrate 30. As the light emitting element 31, an LED, an organic EL, or the like is used. The light emitting module 12 is attached to a heat radiating plate 32, the heat radiating plate 32 is attached to the attachment surface 24 of the housing 11, and the light emitting module 12 is disposed in the concave portion 21 of the housing 11. A wiring hole 33 is formed in the heat sink 32.

  The lens 13 is made of a light-transmitting synthetic resin or a member such as glass. The lens 13 is a double reflection type lens that is thin and capable of narrowing the light distribution. The lens 13 includes a lens body 40 and an attachment portion 41 provided on the periphery of the lens body 40.

  The lens body 40 has an incident surface 42 on which light from the light emitting element 31 is incident, an output surface 43 provided on the opposite side of the incident surface 42, and a light incident on the incident surface 42 that is disposed opposite to the incident surface 42. A first reflecting surface 44 that reflects toward the periphery of 42, and a second reflecting surface 45 that is disposed around the incident surface 42 and reflects light reflected by the first reflecting surface 44 toward the exit surface 43. Have. The exit surface 43 and the first reflection surface 44 are formed in common on the front surface of the lens 13 and function as the exit surface 43 or the first reflection surface 44 according to the incident angle of light on the front surface of the lens 13. It is configured as follows.

  An incident-side depression 46 is formed on the incident surface 42 side (opposite to the irradiation direction) of the lens body 40, and the incident surface 42 is formed along the inner surface of the depression 46. The recess 46 is formed in a concave curved surface shape. A protrusion 47 that protrudes from the lens body 40 is formed around the recess 46.

  A recess 48 on the exit side is formed on the front surface of the lens body 40, and an exit surface 43 and a first reflection surface 44 are formed along the inner surface of the recess 48. That is, the first reflecting surface 44 is formed so as to be depressed so that the center portion approaches the incident surface 42. The center of the dent portion 47 is concavely curved, and the center thereof has the largest dent amount, and the dent amount gradually decreases from the central portion toward the peripheral portion and is curved into a gentle convex curve shape. A reflective film may be deposited on a part of the first reflective surface 44.

  An inclined surface 49 that is inclined in the direction opposite to the irradiation direction is formed in the peripheral portion 43a of the exit surface 43 of the lens body 40. That is, the peripheral portion 43 a of the exit surface 43 of the lens body 40 is inclined so as to approach the second reflecting surface 45. This inclined surface 49 is formed in a curved surface. It is optimal that a part of the emission surface 43 has a shape that protrudes most toward one end side in the lens body 40.

  The second reflecting surface 45 is gradually enlarged in diameter from the incident surface 42 side toward the exit surface 43 side, and is formed into a spheroidal or parabolic curved surface. A reflective film is deposited on the second reflective surface 45.

  The attachment portion 41 protrudes from the lens body 40 in the outer diameter direction and is formed in an annular shape around the lens body 40. The communicating portion between the lens body 40 and the mounting portion 41 is formed to be the thinnest. A fitting portion 50 is formed on the outer periphery of the attachment portion 41 so as to be fitted and attached to the lens attachment portion 26 of the housing 11.

  The cover 14 is made of a light-transmitting material and is formed in an annular shape having an opening 60 at the center. The cover 14 is attached to the housing 11 so as to cover the mounting portion 41 of the lens 13, and the peripheral portion of the cover 14 is attached to the cover mounting portion 27 of the housing 11. The inner peripheral portion of the opening 60 of the cover 14 is disposed on the outer diameter side of the lens body 40, that is, on the outer diameter side of the peripheral portion 43a of the emission surface 43. A mounting portion 41 of the lens 13 is held between the cover 11 and the housing 11 by the cover 14 attached to the housing 11, and the lens 13 is held by the housing 11.

  The case 15 is formed in a cylindrical shape by an insulating material such as PBT resin. The case 15 includes a cylindrical main body portion 70 attached to the concave portion 22 of the housing 11, and a base attaching portion 71 that is continuous with the other end side of the main body portion 70 and protrudes from the concave portion 22 of the housing 11. .

  The base 16 is a power supply unit that can be connected to a socket for a general lighting bulb. In the present embodiment, the base 16 is an E-type base, and is attached to a base mounting part 71 of the case 15.

  Further, the lighting circuit 17 converts the AC power into a predetermined DC power and supplies it to the light emitting element 31 of the light emitting module 12. The lighting circuit 17 includes a circuit board 81 on which a plurality of circuit elements 80 constituting the circuit are mounted. The circuit board 81 is inserted along the axial direction of the case 15 and is accommodated in the case 15 over the main body 70 or the base attaching part 71. A base 16 is electrically connected to the input side of the lighting circuit 17. An electric wire for electrically connecting to the light emitting module 12 is electrically connected to the output side of the lighting circuit 17. The electric wires are wired through the wiring holes 25 of the housing 11 and the wiring holes 33 of the heat sink 32.

  Further, FIG. 3 shows an illumination device 90 that uses the lamp device 10. The illumination device 90 is a downlight, for example. The lighting device 90 has an instrument main body 91 in which a socket 92 and a reflector 93 are disposed. The socket 92 is electrically connected to the base 16 of the lamp device 10 so that AC power can be supplied to the lamp device 10.

  Then, when AC power is supplied to the lamp device 10 attached to the socket 92 of the lighting device 90, the AC power is converted into predetermined DC power by the lighting circuit 17, and is supplied to the light emitting element 31 of the light emitting module 12. The light emitting element 31 emits light.

  As shown in FIG. 4A, the light emitted from the light emitting element 31 enters the lens body 40 from the incident surface 42. Light incident from the incident surface 42 is reflected by the first reflecting surface 44 facing the incident surface 42 toward the second reflecting surface 45 disposed around the incident surface 42. The light reflected by the first reflecting surface 44 is reflected by the second reflecting surface 45 toward the emitting surface 43. The light reflected by the second reflection surface 45 is emitted from the emission surface 43 in the irradiation direction. The light emitted from the emission surface 43 travels in the irradiation direction along the optical axis, and becomes a light distribution with a narrow irradiation angle.

  At this time, as shown in the lens 13 of the comparative example in FIG. 4B, when the peripheral portion 43a of the emission surface 43 is a plane orthogonal to the irradiation direction, it is reflected by the second reflection surface 45. The light incident on the peripheral portion 43a of the emission surface 43 is likely to be emitted in a direction spreading with respect to the optical axis because of the incident angle.

  On the other hand, in this embodiment, as shown in FIG. 4A, the peripheral portion 43a of the exit surface 43 of the lens body 40 is inclined so as to approach the second reflecting surface 45, and the exit surface 43 is An inclined surface 49 that is inclined in the direction opposite to the irradiation direction is formed on the peripheral portion 43a. Therefore, the light reflected by the second reflecting surface 45 and incident on the peripheral portion 43a of the emission surface 43 is easily emitted in the irradiation direction without spreading with respect to the optical axis because of the incident angle.

  FIG. 5 shows the results of measuring the light distribution of the lens 13 of this embodiment and the lens 13a of the comparative example. As shown in FIG. 5, the relative luminous intensity in the region where the emission angle is large is smaller in the lens 13 of this embodiment than in the lens 13a of the comparative example. This is because light in a direction spreading with respect to the optical axis decreases.

  Therefore, according to the lamp device 10 of the present embodiment, the light irradiation efficiency can be improved by reducing the light in the direction extending with respect to the optical axis in the irradiation direction and using the light for irradiation in the predetermined irradiation direction. It is possible to irradiate light having an irradiation pattern with a clear boundary between light and dark.

Also,
Since the lens 13 has an attachment portion 41 sandwiched between the housing 11 and the cover 14 on the outer periphery of the peripheral portion 43a of the emission surface 43, the lens 13 is not affected by the light emission from the lens 13 and the housing. The body 11 can hold it.

  Next, FIG. 6 shows a second embodiment. In addition, the same code | symbol is used about the same structure as 1st Embodiment, and the description about the structure and effect is abbreviate | omitted.

  The light emitting module 12 is attached to the partition 23 of the housing 11.

  In the lens 13a, the peripheral portion of the lens 13a including the inclined surface 49 formed in the peripheral portion 43a of the emission surface 43 is configured as an attachment portion 41.

  Then, the mounting portion 41 of the lens 13 is disposed on the lens mounting portion 26 (end portion of the housing 11) of the housing 11, and the lens 13 is connected to the housing 11 by the cover 14 attached to the cover mounting portion 27 of the housing 11. Hold between. The cover 14 contacts an inclined surface 49 formed on the peripheral portion 43a of the emission surface 43, and sandwiches the lens 13 with the housing 11.

  In the present embodiment, by attaching the peripheral portion 43a of the emission surface 43 to the housing 11 with the cover 14, the peripheral portion 43a of the emission surface 43 is covered and the light emitted from the peripheral portion 43a of the emission surface 43 is cut. Light in a direction spreading with respect to the optical axis can be reduced. Therefore, it is possible to irradiate light having an irradiation pattern with a clear light / dark boundary.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

10 Lamp device
11 Enclosure
12 Light emitting module
13, 13a lens
14 Cover
16 Cap as power supply
17 Lighting circuit
21 recess
30 substrates
31 Light emitting element
41 Mounting part
42 Incident surface
43 Output surface
43a peripheral
44 First reflective surface
45 Second reflective surface
90 Lighting equipment
92 socket

Claims (4)

A housing having a recess opening on one end side;
A light emitting module having a substrate and a light emitting element mounted on the substrate and disposed in the recess;
An incident surface on which light from the light emitting element is incident, an exit surface provided on the opposite side of the incident surface, and disposed so as to face the incident surface and reflect light incident from the incident surface toward the periphery of the incident surface A first reflecting surface; and a second reflecting surface that is disposed around the incident surface and reflects the light reflected by the first reflecting surface toward the exit surface. A lens that is recessed so that a central portion approaches the incident surface, and a peripheral portion of the output surface is inclined so as to approach the second reflecting surface, and is disposed in the concave portion;
An annular cover attached to the housing with the lens sandwiched between the housing;
A power feeding unit disposed on the other end of the housing;
A lighting circuit disposed in the housing;
A lamp device comprising: The lens includes an attachment portion that is sandwiched between the housing and the cover on an outer periphery than a peripheral portion of the emission surface that is inclined so as to approach the second reflection surface. Item 2. The lamp device according to Item 1. The lamp device according to claim 1, wherein the cover sandwiches a peripheral portion of the emission surface inclined so as to approach the second reflection surface with the housing. With sockets;
The lamp device according to any one of claims 1 to 3, wherein the power supply unit is attached to the socket.
An illumination device comprising:

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