JP2014235802A - Led lamp and luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED lamp in which a translucent member covering an LED can be attached by adhesion, and the inside of the translucent member is ventilated by a simple configuration, and a luminaire including the LED lamp.SOLUTION: An LED lamp 1 includes: an LED module 2 having LEDs provided on one surface 9a side of a substrate 9; a housing 5 in which a base 19 is mounted on one end side 5a and the LED module 2 is provided on the other end side 5b; and a translucent member 8 which has a first translucent member 6 provided on the other end side 5b of the housing 5 so as to cover the LED module 2 and a second translucent member 7 which is provided by being adhered to the first translucent member 6 so as to form internal space 27 between itself and the first translucent member 6, and in which adhesion parts 22 and 7c, and a non-adhesion part 26 for ventilating the internal space 27 to the outside air are formed at a boundary between the first and the second translucent members 6 and 7.

Description

  Embodiments described herein relate generally to an LED lamp having a translucent member such as a globe or a cover that covers an LED serving as a light source, and an illumination device including the LED lamp.

  In the light bulb shaped fluorescent lamp and the light bulb shaped LED lamp, the fluorescent lamp and LED which are the light sources are covered with a globe. And there exists what has the glove attached to the housing | casing with the adhesive agent. In addition, for example, there is a structure in which a ventilation hole is provided in a partition that partitions the globe and the housing so that the inside of the globe is vented to the inside of the housing (see, for example, Patent Document 1). That is, when the temperature in the globe rises, the rise in the internal pressure of the globe is suppressed, so that the globe does not break or fall off.

  In addition, there is one in which an opening for preventing an increase in internal pressure of a hollow portion of the housing is provided on the opposite side of the globe of the housing (see, for example, Patent Document 2). The opening vents the air in the hollow portion to the outside air so that the internal pressure of the hollow portion does not increase when a component (for example, a capacitor) of a lighting circuit that lights the LED is melted.

Japanese Patent No. 4560794 (page 9-10, Fig. 4) JP2011-258372A (page 4, FIG. 1)

  If a vent hole is provided on the outer surface of the globe in order to suppress an increase in the internal pressure of the globe, the appearance of the light bulb shaped lamp may be impaired. Further, if only the inside of the globe is vented to the inside of the housing, the inside of the housing rises in temperature due to the heat generated by the lighting circuit and the pressure rises, so that the increase in the internal pressure of the globe may not be suppressed. In addition, providing an opening (ventilation hole) in the housing and venting the inside of the globe from the inside of the housing to the outside air complicates the ventilation path, and the provision of the opening increases the cost of the light bulb lamp. Has drawbacks.

  An object of the present embodiment is to provide an LED lamp in which a translucent member that covers an LED is attached by adhesion, and the inside of the translucent member is ventilated with a simple configuration, and an illumination device including the LED lamp.

  The LED lamp of the present embodiment includes an LED module, a housing, and a light transmissive member. The LED module includes a substrate and an LED provided on one surface side of the substrate. The casing is provided with a base on one end side and an LED module on the other end side.

  The translucent member includes a first translucent member and a second translucent member. The first light transmissive member is provided on the other end side of the housing so as to cover the LED module. The second light transmitting member is provided by being bonded to the first light transmitting member so that an internal space is formed between the second light transmitting member and the first light transmitting member. An adhesive portion and a non-adhesive portion that vents the internal space to the outside air are formed at the boundary between the first and second light transmissive members.

  According to the embodiment of the present invention, the translucent member is formed with a non-adhesive portion that allows the internal space to vent to the outside air, so that the internal space of the translucent member rises in temperature due to the lighting of the LED and the air expands. In some cases, the expanded air can be expected to be suppressed from rising from the non-bonded portion to the external space, thereby suppressing an increase in the internal pressure of the translucent member.

It is a partial cross section schematic side view of the LED lamp which shows the 1st Embodiment of this invention. It is a schematic front view of the state which removed the translucent member of the LED lamp same as the above. The 1st translucent member is shown same as the above, (a) is a schematic upper perspective view, (b) is a schematic lower perspective view. The 2nd translucent member is shown same as the above, (a) is a schematic top view, (b) is a schematic side view, (c) is a schematic sectional side view. The other 2nd translucent member is shown same as the above, (a) is a schematic top view, (b) is a schematic side view, (c) is a schematic sectional side view. It is a partially cut away schematic side view of the illuminating device which shows the 2nd Embodiment of this invention. It is a partially cut away schematic side view of another illuminating device same as the above.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First, a first embodiment of the present invention will be described.

  As shown in FIG. 1, the LED lamp 1 according to the present embodiment is a mini-krypton bulb type LED bulb that is attached to and detached from a bulb socket, and includes a housing 5 that includes an LED module 2, an envelope 3, and a mounting body 4. The light transmitting member 8 includes a lens 6 as a first light transmitting member and a globe 7 as a second light transmitting member.

  As shown in FIG. 2, the LED module 2 includes a substrate 9, an LED chip 10 and a sealing resin 11 as LEDs. The substrate 9 is made of, for example, an aluminum (Al) plate having a thickness of 1.2 mm, and has an outer shape of, for example, a substantially square shape. The LED chip 10 emits blue light, for example, and is mounted on the substrate 9 by a COB (Chip On board) method.

  That is, in the LED module 2, a plurality of LED chips 10 are concentrically mounted on one surface 9a side of the substrate 9 via an insulating layer having high thermal conductivity (not shown). A frame portion (bank) 12 is provided. The frame 12 is filled with a sealing resin 11 such as a silicone resin that covers and seals the LED chip 10. The sealing resin 11 is mixed with a yellow phosphor (not shown) that is excited by part of the blue light from the LED chip 10 and emits yellow light.

  In addition, the board | substrate 9 may be formed with resin materials, such as a glass epoxy material and a paper phenol material, and may itself be formed with the ceramic board etc. which have insulation.

  A connector 13 is mounted on the one surface 9 a side of the substrate 9. This connector 13 is electrically connected to the LED chip 10 by a wiring pattern (not shown). The plurality of LED chips 10 are connected in series by a wiring pattern (not shown). And the connector 13 is connected to the lighting device 14 mentioned later by the lead wire not shown.

  The LED chip 10 lights up (emits light) when predetermined power (current) is supplied from the lighting device 14. In the LED module 2, the surface of the sealing resin 11 is a light emitting surface, and white light in which blue light and yellow light are mixed is emitted from the light emitting surface.

  In FIG. 1, a housing 5 includes an envelope 3 made of a metal material having a high thermal conductivity, such as aluminum (Al), and a synthetic resin having an electrical insulation property and a high thermal conductivity, such as polybutylene terephthalate. It is formed from the attachment body 4 made of (PBT) resin. The envelope 3 as a whole is formed in a substantially inverted truncated cone shape that gradually increases in diameter from one end side 3a to the other end side 3b, and a dowel (not shown) that projects inwardly is provided on the other end side 3b. ing. Three dowels are formed at intervals of 120 ° in the circumferential direction. And as shown in FIG. 2, the end surface 3c of the other end side 3b of the envelope 3 is formed in the plane. On the peripheral edge side of the end face 3c, a concave groove 16 is provided between the insertion port 15 and a dowel (not shown). The concave groove 16 is formed in an arcuate rectangle having a predetermined depth and a full length. Further, the insertion port 15 is formed in an arcuate rectangular shape through which a lead wire (not shown) connected to the connector 13 of the LED module 2 can be inserted. The envelope 3 is molded as described above by aluminum die casting.

  A heat radiating plate 17 is placed on the end surface 3 c of the envelope 3. The heat radiating plate 17 is fixed to the end surface 3 c by screws 18. That is, the radiator plate 17 is provided with an insertion hole (not shown) through which the screw 18 is inserted, and the dowel (not shown) of the envelope 3 is provided with a screw hole of the screw 18. The LED module 2 is attached to the heat sink 17. The substrate 9 of the LED module 2 is in close contact with the heat radiating plate 17 and fixed with screws (not shown). Thus, as shown in FIG. 1, the LED module 2 is provided on the other end side 3 b of the envelope 3 (the other end side 5 b of the housing 5). The envelope 3 may be formed of a resin or ceramic having a good thermal conductivity.

  An attachment body 4 is inserted and attached to the envelope 3. The attachment body 4 is formed in a cylindrical shape having an outer shape in which one end side 4 a is formed in a substantially cylindrical shape and the other end side 4 b is in close contact with the inner surface of the envelope 3. The attachment body 4 is fixed to the envelope 3 by attachment means (not shown) on the inner surface of the envelope 3. The attachment body 4 has a spiral ridge formed on the outer surface of one end side 4a thereof, and an E-shaped base 19 as a base is screwed to the ridge. The E-shaped base 19 is caulked and fixed to the outer surface of the one end side 4 a of the attachment body 4. The E-shaped base 19 and the metal envelope 3 are insulated by the outer peripheral surface 4 c on the one end side 4 a of the attachment body 4. In this way, the E-shaped base 19 is attached to one end side 4 a of the attachment body 4 (one end side 5 a of the housing 5).

  The envelope 3 is formed of, for example, aluminum (Al) having a high thermal conductivity, so that the heat generated in the LED module 2 is quickly transferred and released from the outer surface 3d. Therefore, if the envelope 3 is formed of a synthetic resin or ceramic having high thermal conductivity and electrical insulation, the mounting body 4 is formed integrally with the envelope 3 to form the housing 5. Also good.

  A lighting device 14 is housed in the housing 5 (attachment 4). The lighting device 14 includes various types of circuit components mounted on a circuit board, and forms a known lighting circuit that lights the LED chip 10 of the LED module 2. The input side of the lighting device 14 is connected to the E-shaped base 19 by a wire (not shown). The output side of the lighting device 14 is connected to the connector 13 of the LED module 2 by a lead wire (not shown). The lighting device 14 operates when power is supplied through the E-shaped base 19, and supplies a predetermined constant current to the LED chip 10 of the LED module 2.

  A translucent member 8 is provided on the other end side 5 b of the housing 5. The translucent member 8 includes two parts, a lens 6 that is a first translucent member and a globe 7 that is a second translucent member.

  The lens 6 is made of, for example, polycarbonate resin, and as shown in FIG. 3A, the central portion 20a is recessed with a smooth curved surface, and the cylindrical portion 21 is provided in the central portion 20a, and the peripheral portion 20b is planar. It is formed in a substantially bowl shape provided with an annular seat 22. An annular groove 23 having a predetermined depth is formed in the annular seat 22.

  Moreover, as shown in FIG.3 (b), the lens 6 is provided with the three attachment pieces 24 at the end surface 20c side. The attachment piece 24 is provided corresponding to the concave groove 16 formed in the end surface 3 c of the envelope 3, and is formed so as to be insertable into the concave groove 16. The lens 6 is bonded to the end surface 3c by inserting an attachment piece 24 into the groove 16 after an adhesive is applied to the end surface 3c of the envelope 3 including the inside of the groove 16. The lens 6 is fixed to the end surface 3c of the envelope 3, and covers the LED module 2 as shown in FIG.

  The lens 6 transmits a part of the radiated light emitted from the LED module 2, and guides the other part of the radiated light from the outer peripheral surface 6 a exposed to the external space of the housing 5. The light is emitted to the outer surface 3d side of the container 3. That is, it functions as a light guide that realizes wide light distribution with the radiated light from the LED module 2.

  The globe 7 is formed in a substantially spherical shape by a translucent resin material such as polycarbonate resin so that the other end side 7 f is closed and the one end side 7 e is opened and the lens 6 is covered. The inner surface 7b of the globe 7 is formed in a ripple shape as shown in FIG. And the glove | globe 7 has the end surface 7c formed in planar shape, and the cyclic | annular protrusion 25 of the cross-sectional triangle is provided in the end surface 7c. The annular ridge 25 is formed so that it can be inserted into an annular groove 23 formed in the annular seat 22 of the lens 6.

  In addition, the globe 7 has a notch 26 formed on the end surface 7c thereof. The notch 26 extends from the outer surface 7a to the inner surface 7b of the globe 7, and cuts the annular ridge 25 and has a rectangular shape having a depth of, for example, 0.1 to 1.0 mm from the end surface 7c to the top 7d side. As shown in FIG. 4A, for example, four pieces are provided at 90 ° intervals in the circumferential direction with respect to the top portion 7d.

  The globe 7 is adhered to the annular seat 22 by applying an adhesive to the annular seat 22 including the inside of the annular groove 23 of the lens 6 and then inserting the annular ridge 25 into the annular groove 23. At this time, the globe 7 is bonded so as to be pressed strongly against the lens 6. The globe 7 is fixed to the annular seat 22 of the lens 6 and covers the lens 6 as shown in FIG. At this time, an internal space 27 is formed between the lens 6 and the globe 7. That is, the shapes of the lens 6 and the globe 7 are set so that the internal space 27 is formed inside the globe 7.

At the boundary between the lens 6 and the globe 7, the annular seat 22 of the lens 6 and the end surface 7 c of the globe 7 that are bonded to each other serve as an adhesive portion to which the lens 6 and the globe 7 are bonded. The notches 26 of the globe 7 are not bonded to the annular seat 22 of the lens 6 but are non-bonded portions of the lens 6 and the globe 7. Each notch 26 is formed so as to vent the internal space 27 to the outside air. Each notch 26 has an opening area of 0.2 mm ² or more in a state where the end surface 7 c of the globe 7 is bonded to the annular seat 22 of the lens 6. The upper limit value of the opening area may be set as appropriate in consideration of the appearance of the globe 7 or the LED lamp 1 and is, for example, 1.0 mm ² .

  Next, the operation of the first embodiment of the present invention will be described.

  The LED lamp 1 is mounted on a light bulb socket of a lighting device. When an external power source is applied to the E-shaped base 19, the lighting device 14 is operated, and a predetermined constant current (power) is supplied from the lighting device 14 to the plurality of LED chips 10 of the LED module 2. The plurality of LED chips 10 are lit and white light is emitted from the LED module 2. The white light is incident on the lens 6, a part of the white light is guided and diffused in the lens 6, is emitted to the globe 7, and is further diffused by the rippled inner surface 7 b of the globe 7. It is transmitted and radiated to the external space. Further, part of the white light incident on the lens 6 is guided and emitted from the outer peripheral surface 6 a of the lens 6 to the external space on the envelope 3 side. In this way, white light with a wide light distribution is emitted from the LED lamp 1.

  When the LED chip 10 is turned on, the LED module 2 generates heat. This heat raises the temperature of the lens 6 and gradually raises the temperature of the air in the internal space 27 between the lens 6 and the globe 7. The air in the internal space 27 expands as the temperature rises. The air in the internal space 27 escapes from the cutout portion 26 of the globe 7 to the external space outside the globe 7 as it expands. Thereby, the raise of the internal pressure of the internal space 27 by lighting of the LED chip 10 is suppressed. Since the pressure in the internal space 27 does not increase, the glove 7 attached to the lens 6 by adhesion is prevented from being detached from the lens 6. That is, the glove 7 is prevented from falling off.

  According to the LED lamp 1 of the present embodiment, the translucent member 8 is formed with the cutout portion 26 through which the internal space 27 between the lens 6 and the globe 7 vents to the outside air. When the temperature of the internal space 27 of the translucent member 8 rises and the air expands, the expanded air escapes from the notch portion 26 to the external space and suppresses the pressure increase in the internal space 27 of the translucent member 8. As a result, it is possible to prevent the glove 7 attached to the lens 6 from being dropped by adhesion with a simple configuration.

  And since the notch part 26 is formed in the end surface 7c of the glove | globe 7 to adhere | attach, it has the effect that it can suppress easily and it can suppress impairing the external appearance of the LED lamp 1. FIG.

  In the present embodiment, the globe 7 may be provided with a vent hole 28 as a non-adhesive portion on the end surface 7c, as shown in FIG. The vent hole 28 is formed closer to the top portion 7d than the annular ridge 25 so that the outer surface 7a and the inner surface 7b can ventilate.

  In addition, the globe 7 may be bonded to the lens 6 without providing the cutout portion 26 and the vent hole 28, and by providing the end surface 7 c with the annular protrusion 25 and a non-adhesive portion of the adhesive. The non-applied portion of the adhesive becomes a non-adhesive portion of the translucent member 8 and ventilates the outer surface 7a and the inner surface 7b. Here, when the globe 7 is formed so that the flatness of the end surface 7c is deteriorated, it is preferable that a ventilation gap is easily formed in a non-application portion of the adhesive.

  Further, the globe 7 is not limited to adhesion by an adhesive, and may be adhered by welding or pressure welding. The globe 7 does not have to be substantially spherical. The shape of the globe 7 is not limited as long as the other end 7f is closed and the one end 7e is opened. For example, the globe 7 has a bowl shape or a square box shape. There may be. Moreover, the globe 7 may be formed of translucent glass.

  The first light transmissive member of the light transmissive member 8 is not limited to the lens 6 and may be, for example, a light guide. Moreover, the 2nd translucent member should just be a translucent thing provided by being adhere | attached on the 1st translucent member not only in the globe 7, For example, a cover may be sufficient.

  Further, in the present embodiment, the LED module 2 is not limited to the LED chip 10 and may be formed using a packaged LED element. Further, the housing 5 is not limited to a substantially truncated cone with a large diameter and may be a cylinder such as a cylinder or a square tube. Further, the base is not limited to the E-shaped base 19 but may be a base with a terminal pin or GX53 type.

  Next, a second embodiment of the present invention will be described.

  FIG. 6 is a partially cutaway schematic front view of a lighting device showing the present embodiment, and FIG. 7 is a partially cutout schematic front view of another lighting device. The same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted.

  The lighting device 31 shown in FIG. 6 is a downlight that uses the LED lamp (LED bulb) 1 shown in FIG. 1 and is embedded in the ceiling 32. A light bulb socket 34 as a socket is disposed on a main body 33 of which the outer shape is formed in a substantially cylindrical shape with a bottom. The apparatus main body 33 is sandwiched between the ceiling 32 and fixed to the ceiling 32 by a cover body 35 and leaf springs 36, 36 provided integrally with the apparatus main body 33. The LED lamp 1 is attached to the socket 34 for the light bulb.

  When the light bulb socket 34 is energized, the lighting device 14 (not shown) of the LED lamp 1 operates, and a predetermined constant current is applied to each LED chip 10 (not shown) of the LED module 2 (not shown). Supplied. As a result, the plurality of LED chips 10 are turned on, and white light is emitted from the outer peripheral surface 6 a of the lens 6 and the outer surface 7 a of the globe 7. The white light is illumination light with a wide light distribution, and is emitted from the light transmitting portion 35a of the cover body 35 to the floor surface side as direct light and reflected light reflected by the inner surface 33a of the apparatus body 33.

  A lighting device 41 shown in FIG. 7 is a hanging type lighting fixture suspended from a ceiling 32, and an E-shaped base 19 (illustrated) of the LED lamp 1 shown in FIG. No.) is provided as a socket 43 to which a light bulb is attached. The apparatus main body 42 is connected to a power cord 45 having a hooking sealing cap 44 at the tip.

  The hook sealing cap 44 is attached to a hook ceiling body 46 disposed on the ceiling 32. Thereby, an external power supply is supplied to the socket 43 for electric bulbs via the power cord 45 or the like. The hook sealing cap 44 and the hook sealing body 46 are covered with a sealing cover 47. The LED lamp 1 is mounted on a socket 43 for a light bulb.

  The LED lamp 1 is turned on in response to an on / off operation of a wall switch (not shown). And the white light radiated | emitted from the outer peripheral surface 6a of the lens 6 illuminates the ceiling 32 side, and the white light radiated | emitted from the outer surface 7a of the globe 7 illuminates the floor surface side by wide light distribution.

  According to the lighting fixtures 31 and 41 of the present embodiment, since the LED lamp 1 in which the pressure of the internal space 27 between the lens 6 and the globe 7 is released to the external space is provided, the globe 7 attached to the lens 6 by adhesion. Can be prevented, and the irradiated surface can be illuminated.

  In addition, the lighting fixture of this embodiment is not limited to an embedded type or a hanging type, but may be a direct-attached type lighting fixture.

  Further, the above-described embodiment of the present invention is presented as an example, and is 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 spirit 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.

  DESCRIPTION OF SYMBOLS 1 ... LED lamp, 2 ... LED module, 5 ... Housing, 6 ... Lens as 1st translucent member, 7 ... Globe as 2nd translucent member, 7c ... End surface of glove as adhesion part, 8 ... Light-transmitting member, 9 ... substrate, 10 ... LED chip as LED, 19 ... E-shaped base as base, 22 ... annular seat of lens as adhesive part, 26 ... notch part as non-adhesive part, 27 ... inside Space, 28 ... vent hole as non-adhesive part, 31, 41 ... lighting device, 33, 42 ... device main body, 34, 43 ... light bulb socket as socket

Claims (3)

An LED module having a substrate and LEDs provided on one side of the substrate;
A housing having a base attached to one end and the LED module provided on the other end;
The first translucent member is formed so that an internal space is formed between the first translucent member provided on the other end side of the housing and the first translucent member so as to cover the LED module. A second light-transmitting member that is bonded to the member is provided, and an adhesive portion and a non-adhesive portion that vents the internal space to the outside air are formed at the boundary between the first and second light-transmitting members. A translucent member;
An LED lamp characterized by comprising:   The LED lamp according to claim 1, wherein the non-bonding portion is a cutout portion formed in the second light-transmissive member. An LED lamp according to claim 1 or 2;
An apparatus body having a socket to which the base of the LED lamp is connected;
An illumination device comprising:

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