JP2015173007A - Lighting device and lighting unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device which is improved in waterproofness, and improved in maintainability, and a lighting unit.SOLUTION: A lighting device comprises: a long-length mounting base board; a plurality of LEDs which are mounted at a first face of the mounting base board along a longitudinal direction of the mounting base board; a heat dissipation member attached to the mounting base board of a second face opposite to the first face; a light-permeable pipe-shaped cover member which is inserted with the heat dissipation member in a state that the mounting base board is attached thereto from one open end; and a power feed part which is attached in order to feed power to the LEDs from at least one of longitudinal directions of the pipe-shaped cover member.

Description

  Embodiments described herein relate generally to an illumination device using a light emitting diode (LED) as a light source and an illumination unit using the illumination device.

Conventionally, a tube-type lighting device using a light-emitting diode as a light source is known. (For example, Patent Document 1)
Patent Document 1 is arranged so as to cover a plurality of light emitting elements arranged in a row in a first direction, a mounting substrate on which the light emitting elements are mounted, a light emitting surface side of the light emitting elements, A translucent cover member having an arc-shaped cross section and formed so as to extend in the first direction, and a heat dissipation member mounted with the mounting substrate and attached to the translucent cover member. The member includes an outer heat radiating portion that radiates heat to the outside of the translucent cover member and an inner heat radiating portion that radiates heat to the inside of the light transmissive cover member.

JP 2010-62023 A

  In the technique of Patent Document 1 described above, the heat radiating member on which the mounting substrate of the light emitting element is mounted and the translucent cover member having a C-shaped cross section are attached in the longitudinal direction. That is, there is a joint portion in the longitudinal direction of the lighting device. For example, in a refrigerated showcase, it is necessary to provide waterproofing in order to eliminate the possibility of moisture adhering to the lighting device and causing problems in circuits and the like. This waterproofing has a problem that the waterproofing may be deteriorated due to aging.

  Moreover, in order to take waterproofing of a translucent cover member and a heat radiating part, fixing means, such as an adhesive agent, are required. For this reason, there exists a subject that the maintainability when a malfunction generate | occur | produces in a mounting substrate etc. is also low.

  An object of the present invention is to provide an illuminating device and an illuminating unit that are improved in waterproofness and improved in maintainability.

  In order to solve the above-described problems, an illumination device of the present invention includes a long mounting board, a plurality of LEDs mounted on a first surface of the mounting board along a longitudinal direction of the mounting board, and the first A heat radiating member attached to the mounting substrate on the second surface opposite to the first surface, and a light-transmitting tubular cover member in which the heat radiating member in a state where the mounting substrate is attached is inserted from one open end And a power supply portion attached to supply power to the LED from at least one of the longitudinal directions of the tube-shaped cover member.

It is a partially cutaway perspective view for demonstrating 1st Embodiment concerning the illuminating device of this invention. It is a partially notched front view of the state seen from the front of 1st Embodiment. FIG. 3 is a side view of FIG. 2. It is a front view which expands and shows the socket of FIG. 2 from the front. FIG. 2A is an enlarged sectional view taken along line AA. It is sectional drawing for demonstrating operation | movement of 1st Embodiment. It is sectional drawing for demonstrating 2nd Embodiment concerning the illuminating device of this invention. It is a figure for demonstrating operation | movement of 2nd Embodiment. It is a figure for demonstrating operation | movement of 2nd Embodiment. It is a partially cutaway perspective view for demonstrating 3rd Embodiment concerning the illuminating device of this invention. It is a figure for demonstrating the operation | movement of 3rd Embodiment. It is a figure for demonstrating the operation | movement of 3rd Embodiment. It is a sectional side view for demonstrating embodiment concerning the illumination unit of this invention. It is a schematic block diagram for demonstrating the example of a lighting circuit used for an illumination unit.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. In each embodiment, the same components are described with the same reference numerals.

(First embodiment)
1-5 is a figure for demonstrating 1st Embodiment concerning the illuminating device of this invention. FIG. 1 is a partially cutaway perspective view. FIG. 2 is a partially cutaway front view of the first embodiment as viewed from the front. FIG. 3 is a side view of FIG. 4 is an enlarged front view of the socket of FIG. 2 from the front. FIG. 5 is an enlarged cross-sectional view taken along the line AA of FIG.

  As shown in FIGS. 1 to 5, the lighting device 100 includes an LED 11, a mounting substrate 12, a tube cover member 13, a heat dissipation member 14, a lens 15, and a socket 16.

  A plurality of LEDs 11 are mounted in a row on the first surface (front surface) in the longitudinal direction of the long mounting substrate 12. The tube-type cover member 13 has a translucent cylindrical shape. The mounting substrate 12 is inserted into the tubular cover member 13 from the opening end, and is disposed so as to cover the light emitting surface 11a and the non-light emitting surface side 11b of the LED 11. A second surface (back surface) of the mounting substrate 12 is attached to the heat dissipation member 14. The lens 15 is a rod-like convex lens and is disposed on the LED 11. Sockets 16, which are power supply units for supplying power to the LEDs 11, are attached to both ends of the tube-type cover member 13 and the heat dissipation member 14.

  The lens 15 is not limited to a convex lens, and any lens having a lens effect such as a concave lens or a Fresnel lens may be used. Further, the lens 15 can be used in a detached state. In this case, since the lens 15 for adjusting the light distribution is eliminated, the light distribution angle is widened. For example, the lens 15 can be taken out from the illuminating device 100 installed with the lens 15 once attached, and the light distribution angle can be changed.

  The LED 11 is fixed to the mounting substrate 12 and electrically connected via an adhesive layer (not shown).

  The mounting substrate 12 is electrically connected to the socket pins 16 a and 16 b of the socket 16 by arranging wiring (not shown).

  The tube-type cover member 13 is made of a straight tube transparent or translucent polycarbonate resin, for example. The socket 16 is disposed between the sockets 16. The tube-type cover member 13 is formed so that the mounting substrate 12 does not come into direct contact with moisture such as cold air or water vapor. The tube-type cover member 13 is formed with at least translucency at a position facing the light emitting surface 11 a of the LED 11. A diffusing material is placed in the light emitting portion of the tubular cover member 13. The diffuser prevents glare.

  The tube-type cover member 13 may be formed so that the position facing the non-light emitting surface 11b (back surface) of the LED 11 is non-translucent so that the emitted light of the LED 11 does not leak to the outside.

  The heat dissipation member 14 is made of a metal such as aluminum, and is formed by, for example, extrusion molding. The heat dissipation member 14 has concave portions 14a and 14b formed on the side surfaces in the longitudinal direction. The heat radiating member 14 has a hollow portion 14c formed during extrusion molding. The hollow portion 14c has the purpose of enhancing the heat dissipation effect and reducing the weight of the heat dissipation member 14 itself.

  Further, the heat radiating member 14 is formed with a corrugated shape 14 d in the short direction of the surface facing the tubular cover member 13. The corrugation 14d has an effect of increasing the heat dissipation effect by increasing the surface area. The corrugation 14d may be uneven.

  The lens 15 is made of a transparent polycarbonate resin, for example. The lens 15 performs light distribution adjustment. On both sides of the lens 15 in the short direction, guide portions 15a and 15b in a protruding state are integrally formed.

  As shown in FIG. 5, convex portions 13 a and 13 b extending integrally in the longitudinal direction from one end to the other end are integrally formed on the inner surface of the tubular cover member 13. The concave portions 14a and 14b of the heat dissipation member 14 are engaged with the convex portions 13a and 13b. The concave portions 14a and 14b are engaged by aligning the concave portions 14a and 14b with the convex portions 13a and 13b and sliding the heat radiating member 14 within the tubular cover member 13. The convex portions 13a and 13b and the concave portions 14a and 14b may be reverse in the convex shape and the concave shape.

  Concave portions 13c and 13d extending in the longitudinal direction from one end to the other end are integrally formed on the inner surface of the tubular cover member 13 above the convex portions 13a and 13b. The concave portion 13c is configured by ribs 13c1 and 13c2 provided integrally with the tube-type cover member 13. The concave portion 13d is configured by ribs 13d1 and 13d2 provided integrally with the tube-type cover member 13 in an integrated manner.

  The guide portions 15a and 15b of the lens 15 are engaged with the concave portions 13c and 13d. The concave portions 13c and 13d are engaged by aligning the guide portions 15a and 15b with the concave portions 13c and 13d and sliding the lens 15 in the tubular cover member 13. The lens 15 can be replaced with a lens having a different focal length. In this case, the light distribution is different because the focal length is different.

  The mounting substrate 12 and the lens 15 attached in the tubular cover member 13 are supported in a substantially parallel state via the space 18.

  Next, the operation of the first embodiment will be described with reference to FIG. FIG. 6 shows the lighting device 100 of FIG. 5 upside down.

  In FIG. 6, when the LED 11 is turned on, the light emitted from the LED 11 reaches the lens 15. Light passes through the lens 15 and is refracted. The lens 15 is a convex lens, and refraction is refracted in the direction of focusing light.

  Therefore, the light emitted from the LED 11 emitted in the direction of about 180 degrees is narrowed by the lens 15 and emitted at the light distribution angle θ1. The light distribution angle θ1 in the figure is, for example, about 90 degrees.

  In FIG. 6, light emitted to the side between the mounting substrate 12 and the lens 15 is omitted. For the light emitted to the side between the mounting substrate 12 and the lens 15, for example, a means for shielding light such as making a part of the tube-shaped cover member 13 black is provided, and the light emitted from the LED 11 is used for the lens 15. You may make it radiate | emit via.

  Thus, the illuminating device 100 which can radiate | emit the emitted light of LED11 by the light distribution by the lens 15 is realizable. Since the lighting device 100 stores the mounting substrate 12 on which the LEDs 11 are mounted in the tube-shaped cover member 13, there is no joint between both ends of the tube-shaped cover member 13. For this reason, the waterproofness with respect to the mounting substrate 12 etc. can be aimed at. For this reason, it can be applied as a lighting device such as a refrigerated showcase that needs waterproofing.

  The mounting substrate 12 on which the LEDs 11 are mounted can be taken in and out while sliding along the convex portions 13a and 13b in the tube-type cover member 13. Since the once mounted mounting substrate 12 can be taken out, maintenance can be improved.

  In this embodiment, the waterproof property can be improved and the maintenance property can be improved.

(Second Embodiment)
FIG. 7: is sectional drawing for demonstrating 2nd Embodiment concerning the illuminating device of this invention.

  In this embodiment, concave portions 13e and 13f are formed adjacent to the concave portions 13c and 13d on the side close to the LED 11 of the first embodiment. The concave portion 13e includes a rib 13c2 of the concave portion 13c and a newly provided rib 13e1. The concave portion 13f includes a rib 13d2 of the concave portion 13d and a newly provided rib 13f1.

  The guide portions 15a and 15b of the lens 15 can be engaged with the concave portions 13e and 13f. When engaging the concave portions 13e and 13f, the guide portions 15a and 15b of the lens 15 are aligned with the concave portions 13e and 13f, and the lens 15 is slid in the tubular cover member 13 to be engaged.

  The lens 15 can select a first position to be engaged with the concave portions 13c and 13d and a second position to be engaged with the concave portions 13e and 13f. In the case of the 1st position, it leaves from LED11, and in the case of the 2nd position, it becomes the positional relationship which approaches LED11.

  The mounting substrate 12 and the lens 15 attached in the tubular cover member 13 are supported in a substantially parallel state via the space 18. The space portion 18 becomes wider or narrower depending on the engagement position of the lens 15.

  FIG. 8 shows the light distribution when the engagement of the lens 15 is in the first position. FIG. 9 shows the light distribution when the engagement of the lens 15 is in the second position. In addition, the illuminating device of FIG. 8, FIG. 9 has shown in the state up and down of FIG.

  The light distribution angle in the case of FIG. 8 is θ1 as in FIG. It is not always necessary to set θ1. The light distribution angle in the case of FIG. 9 is θ2. In the figure, θ2 is about 120 degrees, for example. The light distribution angle θ2 on the side closer to the LED 11 of the lens 15 is larger than the light distribution angle θ1 on the far side (θ2> θ1). That is, in the case of the lens 15 engaged in the state of FIG. 8, a relatively narrow range is irradiated, and in the case of the lens 15 engaged in the state of FIG. 9, the irradiation range is wider than that in FIG.

  Also in the case of FIGS. 8 and 9, the light emitted to the side between the mounting substrate 12 and the lens 15 is omitted as in FIG. 6. For the light emitted to the side between the mounting substrate 12 and the lens 15, for example, a means for shielding light such as making a part of the tube-shaped cover member 13 black is provided, and the light emitted from the LED 11 is used for the lens 15. You may make it radiate | emit via.

  In this embodiment, although the illumination device 100 has the same configuration, it is possible to obtain irradiation for different purposes by selecting the first or second engagement position of the lens 15.

(Third embodiment)
Next, a third embodiment will be described with reference to FIGS. FIG. 10 is a cross-sectional view. 11 and 12 are explanatory diagrams for explaining the operation of FIG. 11.

  In this embodiment, a second tubular cover member 20 is attached to the outer periphery of the tubular cover member 13 of the first embodiment. The tubular cover member 13 is attached so as to be rotatable in the inner peripheral direction of the second tubular cover member 20.

  FIG. 11 shows a state in which it is rotated clockwise by an angle θ3 (about 30 degrees) in the drawing. FIG. 12 shows a state in which it is rotated counterclockwise by an angle θ4 (about 20 degrees). Thereby, the irradiation angle of the illuminating device 100 can be changed.

  As described above, since the irradiation direction of the lighting device can be easily changed, it is possible to improve the flexibility of the installation location and the irradiation condition of the illumination. In this embodiment, when combined with the second embodiment, the irradiation angle and the irradiation range can be changed, and the flexibility can be further improved.

  In this embodiment, the illuminating device inside the second tubular cover member can be rotated by inserting the second tubular cover member outside the tubular cover member. Thereby, the needs with respect to the installation conditions of the lighting device can be met.

  FIG. 13 is a side sectional view showing a structure of a showcase as an illumination system including an illumination device according to an embodiment of the present invention. The illustrated showcase is called an open showcase for displaying and selling commodities (not shown) such as frozen food and fresh food at a store such as a supermarket. The showcase includes a showcase body 50. The showcase body 50 has a shape in which the front surface and both side surfaces are open, and includes an outer box 51 that forms an outer surface and an inner box 52 that forms an inner surface.

  The outer box 51 includes a bottom surface portion 51a, an outer back wall portion 51b, and an outer upper wall portion 51c. The inner box 52 includes a deck pan portion 52a, an inner back wall portion 52b, and an inner upper wall portion 52c, and is a space surrounded by the deck pan portion 52a, the inner back wall portion 52b, and the inner upper wall portion 52c. The product storage 53 is defined.

  In the showcase, three lighting devices 100 (100a to 100c) according to an embodiment of the present invention are installed on the outer upper wall portion 51c of the showcase body 50 according to an embodiment of the present invention.

  The illumination devices 100a and 100b are attached to a top case 57 that protrudes forward from the front end of the outer upper wall portion 11c. The top case 57 constitutes a light rail 55 in a box-shaped portion that protrudes further forward than the front end edge of the product display shelf 54d of the product display shelves 54a to 54d located at the lowermost stage, and a portion that faces downward. . The light rail 55 is a flat plate portion that extends in a manner that gradually inclines upward toward the rear. The light rail 55 preferably has an inclination angle α with respect to the vertical plane in the range of 65 to 85 °, and more preferably has an inclination angle α of 75 °. The lighting device 100c is attached to the front end portion of the inner back wall portion 52b.

  The illumination device 100a is for irradiating illumination light, for example, in the vicinity from the light rail 55 of the top case 57 to the product displayed on the product display shelf 54d from the product take-off lower end portion 56.

  The illumination device 100b is for irradiating illumination light, for example, in the vicinity from the light rail 55 of the top case 57 to the product displayed on the product display shelf 54b from the deck pan 52a.

  The illuminating device 100c is for irradiating illumination light to the vicinity of the upper part of the inner back wall part 52b, the product display shelf 54a, and the deck pan part 52a, for example.

  And the illuminating devices 100a-100c can improve the waterproofness of the illuminating devices 100a-100c by mounting 1st Embodiment of an illuminating device, and can aim at the improvement of maintainability.

  The lighting devices 100a to 100c in the showcase illustrated in FIG. 13 are turned on by, for example, the lighting device 200 illustrated in FIG.

  A schematic lighting device 200 shown in FIG. 14 includes an AC / DC converter (AC / DC converter) 201 and lighting circuits 202a to 202c.

  The AC / DC converter 201 is a circuit that rectifies and smoothes an AC voltage from an AC power source AC such as a commercial power source to convert it into a DC voltage, and includes a diode bridge DB and a capacitor C1. That is, the AC power supply AC is connected between the AC input terminals of the diode bridge DB, and the smoothing capacitor C1 is connected between the DC output terminals of the diode bridge DB.

  The lighting circuit 202a is a circuit that receives a DC voltage from the AC / DC converter 201 and generates a current to be supplied to the LED 11, and constitutes a part of a chopper circuit that functions as a DC / DC converter. The lighting circuit 202a includes a choke coil L for chopping an input DC voltage, a diode D for regenerating energy accumulated in the choke coil L, and a smoothing capacitor C2. The choke coil L, the diode D, and the LED 11 are connected so as to form a circuit loop. The capacitor C2 is connected in parallel with the LED 11, and smoothes the output voltage (and output current) of the lighting circuit 202a.

  The DC output voltage output from the lighting circuit 202a is supplied to the LED 11 to light the LED 11. The lighting circuits 202b and 202c have the same configuration as the lighting circuit 202a, and light the lighting devices 100b and 100c, respectively.

  Note that each of the lighting circuits 202a to 202c may include a light control device. In the light control device, a light control signal can be obtained by controlling the output current of the lighting circuits 202a to 202c. The LED 11 can change the brightness according to the level of the dimming signal.

  In the above, 1st Embodiment of the illuminating device was demonstrated as the illuminating device 100a-100c of a showcase as an illuminating system. Consider a case where the second embodiment of the lighting device is applied as the lighting devices 100a to 100c of the showcase.

  Here, it is assumed that the irradiation angles of the illumination devices 100a to 100c in FIG. 13 are set to a relationship of 100a = 100b <100c.

  In the case of the illuminating device 100c that needs to illuminate the vicinity at a wide angle, the lens 15 is engaged with the concave portions 13e and 13f to obtain the state shown in FIG. In this case, an irradiation angle of θ2 is obtained, and it becomes possible to irradiate illumination light to the upper portion of the inner back wall portion 52b necessary for the showcase, the product display shelf 54a, and the deck pan portion 52a.

  In the case of the illuminating devices 100b and 100c that need to irradiate to a position separated at a relatively narrow angle, the lens 15 is engaged with the concave portions 13c and 13d, respectively, so that the state shown in FIG. In this case, an irradiation angle of θ1 is obtained. And the illuminating device 100b can irradiate illumination light in the vicinity from the light rail 55 of the top case 57 to the product displayed on the product display shelf 54b from the deck pan part 52a. The illumination device 100c can irradiate illumination light to the upper part of the inner back wall part 52b, the product display shelf 54a, and the vicinity of the deck pan part 52a.

  Thus, the illumination device 100 (100a to 100c) can change the engagement position of the lens 15 depending on the irradiation purpose. Therefore, the illumination device 100 can change the first position or the second position by inserting and removing the lens 15 even at the work site to which it is attached.

  Furthermore, the third embodiment and the second embodiment of the lighting device can be combined and applied to a showcase. In this case, finer light distribution adjustment is possible, and illumination intensity adjustment for the showcase can be performed smoothly.

  The present invention is not limited to the contents described in the embodiment described above. For example, in the above-described embodiment, an example in which the lighting device of the present invention is applied to a lighting device for a showcase such as a freezer for a product display or a refrigerator is shown. However, the lighting device of the present invention is applied to a lighting device for a home freezer or a refrigerator. Alternatively, the present invention may be applied to lighting devices for devices other than freezers and refrigerators.

  In the above embodiment, an example of a light emitting diode has been described. However, the present invention is not limited to this, and a light emitting element including elements other than the light emitting diode may be used.

  Moreover, in the said embodiment, although the example which has arrange | positioned LED11 in 1 row was demonstrated, this invention is not limited to this, For example, you may arrange | position in 2 rows (multiple row shape), or 2 rows The first row of LEDs 11 and the second row of LEDs 11 may be arranged in a staggered manner.

  In the above-described embodiment, an example in which the sockets 16 are disposed at both ends of the tubular cover member 13 has been described. However, lid members made of resin or the like may be disposed at both ends of the tubular cover member 13. Specifically, power may be supplied to the LED 11 through a lead wire (terminal) through a through hole opened in the lid member.

  In the above embodiment, an example using the tubular cover member 13 made of a polycarbonate resin was shown, but the present invention is not limited to this, and a translucent cover member made of a resin other than polycarbonate resin is used. Alternatively, a translucent cover member made of glass may be used.

  In the above embodiment, the configuration example in which the LEDs 11 are mounted on one mounting board has been described. However, the LEDs may be mounted on a plurality of mounting boards, respectively.

  Furthermore, in the said embodiment, although the example which formed the illuminating device in the straight tube was shown, this invention is not limited to this, For example, the illuminating device is formed in a U shape, an ellipse, etc. other than a straight tube. May be.

  Although several embodiments have been described, these embodiments have been 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, combinations, 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.

100, 100a to 100c Illumination device 11 LED
12 mounting substrate 13 tube-shaped cover members 13a, 13b convex portions 13c, 13d concave portions 13c1, 13c2, 13d1, 13d2 ribs 14 heat radiation members 14a, 14b concave portions 14c hollow portions 15 lenses 15a, 15b guide portions 16 sockets
18 Space 20 Second tube type cover member 50 Showcase body

Claims (11)

A long mounting board,
A plurality of LEDs mounted on the first surface of the mounting substrate along the longitudinal direction of the mounting substrate;
A heat dissipating member attached to the mounting substrate on the second surface opposite to the first surface;
A light-transmissive tube-type cover member in which the heat dissipating member with the mounting substrate attached is inserted from one open end;
A power supply unit attached to supply power to the LED from at least one of the longitudinal directions of the tube-shaped cover member.   The lighting device according to claim 1, wherein a lens is disposed between the light emitting surface of the LED and the tube cover.   The lighting device according to claim 1, wherein the tubular cover member contains a diffusion material.   A concave (convex) portion formed on the heat radiating member and a convex (concave) portion formed on the inner surface of the tubular cover member are slidably attached so that the heat radiating member can be inserted into and removed from the tubular cover member. The lighting device according to claim 1.   The guide part formed in the both sides of the said lens, and the concave part formed in the inner surface of the said tubular cover member were slidably attached, and the said lens was made to be able to insert / extract from the said tubular cover member. Lighting device.   The lighting device according to claim 5, wherein the tube cover member can be attached in place of lenses having different focal lengths.   The lighting device according to claim 1, wherein the lens is capable of holding a second position close to a first position that is far from the LED in the tubular cover member.   The lighting device according to claim 1, wherein the heat dissipating member is formed to have a hollow longitudinal direction.   The second tubular cover member is disposed on an outer peripheral portion of the tubular cover member, and is rotatable in the circumferential direction between the second tubular cover member and the tubular cover member. The lighting device according to any one of the above. A showcase in which a plurality of product display shelves are defined in a showcase body having an opening on the front surface,
The illumination system which attached the illuminating device as described in any one of Claims 1-9 to the upper part in the said showcase main body.   The lighting system which mounted the illuminating device as described in any one of Claims 1-9 as illumination in a freezer or a refrigerator.

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