JP2010268899A - Lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a showcase lighting system uniformly emitting light from the whole and to be easily fixed onto a manufacturing/installing place despite a long size. <P>SOLUTION: The lighting system includes a frame 80 to be fixed onto a showcase 10 and a lighting unit 30 to be slidingly attached to/detached from the frame 80. A plurality of LEDs are disposed in one major face of a conductive board 32 of the unit 30. One terminal of the LED is connected to the board 32 via an electrode pattern 60 or the like. The other terminal of the LED is drawn to the electrode pattern 60 of the other major face via a through-hole 60 insulated and penetrating through the board 32. Plate springs 88A and 88B electrically connected to a side of the board 32 are provided inside holding parts 84A and 84B of the frame 80. A pattern and an insulation means are provided on the fixing board 82 of the frame 80 for drawing the electrode pattern 60 to the back of the frame 80. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a lighting device, and more particularly to a lighting device for a showcase (including a show window).

  As a lighting device for a showcase, for example, Japanese Patent Application Laid-Open No. 2004-228561 discloses a technique aimed at causing a light emitting surface to emit light uniformly. In Patent Document 1, an illuminating means including a transparent body having a substantially arc-shaped or substantially circular cross section, a cover covering the transparent body, and a plurality of light sources provided between the cover and the transparent body is provided as a reflection case. Disclosed is a light-emitting panel that is disposed on an inner side surface and irradiates light to the light guide plate provided in the reflection case or in the opening of the reflection case by the irradiating means, and a luminescent material using the same. ing.

JP 2007-59163 A

  However, in the technique described in Patent Document 1 described above, the length of the irradiation unit is determined according to the size of the light-emitting panel (or the reflection case). is there. The same applies to the case where the technique described in Patent Document 1 is applied to a long (bar-shaped) lighting device. Further, since wiring for energizing the light source from the power source is required, the direction of the wiring must be taken into consideration when assembling and mounting. Furthermore, if a large number of LEDs are used continuously, the degree of temperature rise is lower than that of incandescent bulbs and fluorescent lamps, but there is a disadvantage that a certain degree of temperature rise cannot be avoided.

  The present invention pays attention to the above points, and its purpose is to uniformly emit light with sufficient brightness as a whole, and even when it is formed in a long shape or a panel shape, It is an object to provide a lighting device for a showcase that can be easily attached. Another object is to provide a lighting device for a showcase capable of suppressing a temperature rise.

  The illumination device for a showcase of the present invention has conductivity, and has a substantially strip-like substrate having one or more through-holes penetrating in the thickness direction and having an inner surface insulated, and one main surface of the substrate A substantially strip-shaped insulating sheet provided on the insulating sheet, a plurality of light sources disposed along the longitudinal direction on the insulating sheet, and formed between the insulating sheet and the plurality of light sources, and one of the plurality of light sources A first electrode pattern connected to a terminal of the first electrode pattern, formed between the insulating sheet and a plurality of light sources, and a second electrode pattern connected to the other terminal of the plurality of light sources, having translucency, A light guide that is fixed to the substrate along a longitudinal direction thereof so that a substantially planar main surface is close to the plurality of light sources at a predetermined interval, the first electrode pattern, and the A first extraction means for electrically connecting the substrates; A lighting unit including a second lead-out means for pulling out the polar pattern to the other main surface side using the through hole of the substrate; a fixing board having conductivity and fixed to the showcase; Holding means for detachably mounting the board of the lighting unit to the fixed board; and conduction means for electrically connecting the fixed board and the board when the board is mounted on the fixed board; And an electrode portion formed on one main surface of the fixed board, electrically connected to the second lead means of the lighting unit, and insulated from the fixed board. Features.

  One of the main forms is that the holding means is formed in a pair along the longitudinal direction on the main surface of the fixed board, and the substrate is slid by engagement with both edges of the substrate. It is characterized by holding it detachably. Preferably, the holding means has conductivity. Alternatively, the holding means is a magnet provided on the other main surface of the substrate and one main surface of the fixed board, respectively. In another embodiment, the conducting means is a spring body that is fixed to the fixing board or the holding means and has electrical conductivity in contact with a side surface of the substrate or the other main surface.

  Yet another embodiment is characterized in that the light guide has a shape in which a light emission side is bent or refracted with respect to an incident direction of light from the light source. Yet another embodiment is characterized in that the light guide has an end face shape at an end portion on the light emission side that is any one of a substantially flat shape, a substantially arc shape, a tapered shape, or a combination of the shapes. . Yet another embodiment is characterized in that a diffusion portion for diffusing light is provided on the light exit side of the light guide.

  Yet another embodiment is characterized in that a heat-dissipating fin is provided on the fixed board. Yet another embodiment is characterized in that the light source is a light emitting diode. Still another embodiment is characterized in that an aluminum plate is used as a substrate and a fixed board of the lighting unit. Yet another embodiment is characterized in that it comprises a connecting means for connecting a plurality of the lighting units in the longitudinal direction. Still another embodiment is a spacer disposed between the other main surface of the fixed board and the mounting surface such that one main surface of the fixed board is inclined with respect to the mounting surface of the showcase. It is provided with. The above and other objects, features and advantages of the present invention will become apparent from the following detailed description and the accompanying drawings.

  According to the present invention, a lighting unit in which a light source is disposed on an insulating sheet on one main surface of a conductive substrate can be attached to and detached from a conductive fixing board fixed to a showcase by a holding means. Hold. Then, one terminal of the light source is pulled out and connected to the substrate, and when the lighting unit is mounted on the fixed board, the substrate and the fixed board are made conductive by the conductive means. Furthermore, while measuring the other terminal of the light source with the substrate, the electrode portion is provided on the main surface of the fixed board via an insulating means through the substrate and pulled out to the other main surface side. By connecting with, the power is supplied only to the fixed board. For this reason, it becomes possible to mount on the fixed board without considering the mounting direction of the lighting unit, and the lighting device can be easily assembled. Moreover, it is possible to suppress the temperature rise by providing the heat sink fins on the fixed board.

It is a figure which shows the use condition of the illuminating device of Example 1 of this invention, (A) is a side view, (B) is the front view which looked at the said (A) from the arrow F1 direction. FIG. 2A is an external perspective view in which the illumination device of the first embodiment is disassembled into a frame and an illumination unit, and FIG. 2B is an external perspective view showing a modification of the frame. FIG. 3A is a side view of the illumination unit of the first embodiment, and FIG. 3B is a plan view of the connection of the illumination unit and the frame as seen from the back side. It is sectional drawing which cut | disconnected said FIG. 2 (A) along the # A- # A line and looked at the arrow direction. FIG. 5A is a plan view showing a wiring pattern of the illumination unit of the first embodiment, and FIG. 5B is a circuit diagram. 6A is an external perspective view showing the configuration of the frame according to the second embodiment of the present invention, and FIG. 6B is an external perspective view showing the configuration of the frame according to the third embodiment of the present invention. It is principal sectional drawing of the illuminating device of Example 4 of this invention. It is a figure which shows Example 5 of this invention, FIG. 8 (A) is principal sectional drawing of an illuminating device, FIG.8 (B) is a top view which shows the back surface side of an illumination unit, FIG.8 (C) is a modification. FIG. FIG. 9A is a side view showing a state before the lighting unit and the intermediate socket are connected, and FIG. 9B is a state of connection between the lighting unit, the intermediate socket and the frame. It is the top view which looked at from the back side. It is sectional drawing which shows the light guide of Example 7 of this invention. It is a side view which shows the use condition of Example 8 of this invention.

  Hereinafter, the best mode for carrying out the present invention will be described in detail based on examples.

  First, Embodiment 1 of the present invention will be described with reference to FIGS. 1A and 1B are diagrams showing a use state of the lighting device of the present embodiment, where FIG. 1A is a side view, and FIG. 1B is a front view of FIG. 1A viewed from the direction of arrow F1. FIG. 2A is an external perspective view in which the illumination device of this embodiment is disassembled into a frame and an illumination unit, and FIG. 2B is an external perspective view showing a modification of the frame. FIG. 3A is a side view of the illumination unit of this embodiment, and FIG. 3B is a plan view of the connection of the illumination unit and the frame as seen from the back side. FIG. 4 is a cross-sectional view of FIG. 2A taken along line # A- # A and viewed in the direction of the arrow. FIG. 5A is a plan view showing a wiring pattern of the illumination unit of this embodiment, and FIG. 5B is a circuit diagram.

  The showcase 10 shown in FIGS. 1 (A) and 1 (B) is surrounded by a light-transmitting cover 16 between a support 12 and an upper surface 14, and a display plate 18 is provided on the inside thereof. The lighting device 20 of the present embodiment is attached to the upper surface 14. If the display board 18 uses the material which has translucency, since the light is irradiated to the goods currently displayed under this display board 18, it is convenient. A power supply 54 for supplying electricity to the lighting device 20 is provided inside the support base 12. The lighting device 20 includes a frame 80 fixed to the upper surface 14, and a lighting unit 30 that can be slidably attached to the frame 80.

  First, the lighting unit 30 will be described. As shown in FIG. 3A, FIG. 4 and FIG. 5A, the illumination unit 30 has a dimension larger than that of the substrate 32 on one main surface of a substantially strip-shaped substrate 32 formed of a conductive metal. A substantially strip-shaped insulating sheet 34 having a small height is provided. For example, an aluminum plate is used as the substrate 32. On the insulating sheet 34, as shown in FIG. 5A, a plurality of electrode patterns 36A to 36F, 36A ′ to 36F ′ are formed, and these electrode patterns 36A to 36F and 36A ′ to 36F ′ are formed. A plurality (12 in this embodiment) of LEDs (light emitting diodes) 50A to 50L are arranged at substantially equal intervals in the length direction so as to straddle. In addition, electrode patterns 36G, 36G ′, 36H, 36H ′, 38, and 40 are provided on the insulating sheet 34. As these electrode patterns, for example, copper is used.

  In this embodiment, as shown in FIG. 5A, the LEDs 50A and 50B straddle the electrode patterns 36A and 36B, the LEDs 50C and 50D straddle the electrode patterns 36C and 36D, and the LEDs 50E and 50F have the electrode patterns 36E, It straddles 36F. Then, the electrode pattern 36B connected to one terminal of the LEDs 50A and 50B is connected to the electrode pattern 36C connected to the other terminal of the LEDs 50C and 50D, and as shown in the circuit diagram of FIG. The connected LEDs 50A and 50B and LEDs 50C and 50D are connected in series. Similarly, the electrode pattern 36D connected to one terminal of the LEDs 50C and 50D and the electrode pattern 30E connected to the other terminal of the LEDs 50E and 50F are connected in series. The electrode pattern 36A is connected to the electrode pattern 36G, and the electrode pattern 36F is connected to the electrode pattern 36H.

  Similarly, for LEDs 50G to 50L, LEDs 50G and 50H straddle electrode patterns 36A 'and 36B', LEDs 50I and 50J straddle electrode patterns 36C 'and 36D', and LEDs 50K and 50L include electrode patterns 36E 'and 36F'. It straddles. Then, the electrode pattern 36B ′ connected to one terminal of the LEDs 50G and 50H is connected to the electrode pattern 36C ′ connected to the other terminal of the LEDs 50I and 50J, as shown in the circuit diagram of FIG. The LED 50G and the LED 50H connected in parallel and the LEDs 50I and 50J are connected in series. Similarly, the electrode pattern 36D ′ connected to one terminal of the LEDs 50I and 50J and the electrode pattern 30E ′ connected to the other terminal of the LEDs 50K and 50L are connected in series. The electrode pattern 36A ′ is connected to the electrode pattern 36G ′, and the electrode pattern 36F ′ is connected to the electrode pattern 36H ′.

  Then, the electrode patterns 36G and 36G ′ are connected by an electrode pattern 38, and the electrode patterns 36H and 36H ′ are connected by an electrode pattern 40, whereby a light source group composed of LEDs 50A to 50F as shown in FIG. And the light source group which consists of LED50G-50L is connected in parallel. With such a connection, even if any of the LEDs connected in parallel is poorly lit, the remaining LEDs continue to illuminate, so that there is an effect that the light quantity shortage is not noticeable.

  A connection portion 42 is formed on one end side (right side of FIG. 5A) of the electrode pattern 36H ′ connected to one terminal of the LED (minus terminal in this embodiment), and is provided on the substrate 32. The power supply unit 46 is connected by a pattern 48. Thereby, the minus terminal of the LED is drawn out to the conductive substrate 32. On the other hand, a connecting portion 44 is formed on one end side (the right side of FIG. 5A) of the electrode pattern 36G ′ connected to the other terminal (plus terminal in this embodiment) of the LED. As shown in FIG. 4, the substrate 32 has a through hole 62 that penetrates in the thickness direction at a position corresponding to the connection portion 44. The inner surface of the through hole 62 is covered with a known insulator 62A.

  Further, as shown in FIGS. 2A and 3B, a substantially strip-shaped insulating sheet 58 is provided on the other main surface of the substrate 32. The insulating sheet 58 has a plus side. An electrode pattern 60 is provided as a power feeding unit. The insulating sheet 58 is for insulating the electrode pattern 60 and the substrate 32 and is formed larger than the electrode pattern 60. Then, by connecting the connecting portion 44 and the electrode pattern 60 with a wiring 64 penetrating the through hole 62, the plus side terminal of the LED is drawn out to the back side of the substrate 32.

  On the LEDs 50A to 50L arranged so as to straddle the wiring patterns 36A to 36F and 36A 'to 36F' as described above, as shown in FIGS. A substantially rectangular long light guide plate 68 is disposed. The light guide plate 68 is fixed to the substrate 32 by screws 72. At that time, one main surface keeps a predetermined distance (the distance IA in FIG. 3A) from the surface of the LEDs 50A to 50L. As described above, a plurality of spacers 66 are provided between the substrate 32 and the light guide plate 68 at appropriate intervals. The interval IA is set to, for example, about 0.2 to 0.3 mm so as to come close in a non-contact state. As the light guide plate 68, for example, an acrylic plate is used. Further, a diffusion tape 70 is provided on the other main surface of the light guide plate 68. The diffusion tape 70 is for scattering or diffusing light emitted from the LEDs 50 </ b> A to 50 </ b> L toward the light guide plate 68.

  Next, the frame 80 fixed to the showcase 10 will be described. As shown in FIGS. 2A and 4, the frame 80 includes a storage portion 86 that stores the substrate 32 of the illumination unit 30 so as to be slidable. The storage portion 86 is substantially planar and has a larger area than the substrate 32, and is provided along the longitudinal direction on the fixed board 82 fixed to the upper surface 14 of the showcase 10 and on both edges of the fixed board 82. It is formed by a pair of gripping portions (or holding portions) 84A and 84B. In the present embodiment, as shown in the figure, the fixing board 82 and the gripping portions 84A and 84B are integrally formed. However, the gripping portions 84A and 84B formed separately from the fixing board 82 are appropriately used to fix the fixing board 82. You may make it attach to. The entire frame 80 has electrical conductivity, and in this embodiment, the frame 80 is formed of an aluminum plate that is a lightweight material excellent in heat dissipation and workability.

  Further, as shown in FIGS. 3B and 4, leaf springs 88A and 88B are provided on the side surfaces 85A and 85B inside the gripping portions 84A and 84B. The leaf springs 88 </ b> A and 88 </ b> B are the negative terminals of the LEDs 50 </ b> A to 50 </ b> L drawn out to the board 32 when the board 32 of the lighting unit 30 is inserted into the storage part 86 and the contact part 89 comes into contact with the side surface. And for electrical connection with the frame 80 itself. As the leaf springs 88A and 88B, for example, phosphor bronze leaf springs are used. In the present embodiment, since the gripping portions 84A and 84B are formed of an aluminum plate, in addition to the electrical connection by the leaf springs 88A and 88B, the contact portion between the gripping portions 84A and 84B and the substrate 32 The structure also contributes to electrical connection.

  Further, as shown in FIG. 4, an electrode pattern 92 is formed on one insulating surface 90 on one main surface of the fixing board 82 (main surface on the storage portion 86 side). An electrode pattern 96 is formed on an insulating sheet 94 on the main surface. The electrode patterns 92 and 96 may be formed in a substantially band shape, or may be partially formed on the end portion side or the center portion of the frame 80. Further, the fixing board 82 has a through hole 98 whose inner surface is covered with an insulator 98A, and the electrode patterns 92 and 96 are connected by a wiring 99 passing through the through hole 98, whereby a substrate is formed. The electrode pattern 60 on the back surface of 32 is drawn out to the back side of the frame 80. The electrode pattern 96 is connected to one (not shown) terminal of the power source 54 (plus in this embodiment), and any part of the frame 80 excluding the insulating sheets 90 and 94 and the electrode patterns 92 and 96 is connected to the power source. 54 is connected to the other terminal (minus in this embodiment). As shown in FIG. 5B, a switch 56 and a resistor (chip resistor) 52 are provided between the electrode pattern 96 and the positive terminal of the power source 54 as shown in FIG.

  Next, the operation of this embodiment will be described. Note that the installation work of the lighting device 20 is performed with the side surface of the cover 16 of the showcase 10 being opened. The frame 80 of the lighting device 20 is fixed to the upper surface 14 of the showcase 10 by appropriate means so that the gripping portions 84A and 84B face the irradiation side. Then, the electrode pattern 96 of the frame 80 is connected to the positive terminal of the power source 58 provided in the support base 12, and any part of the frame 80 excluding the insulating sheets 90 and 94 and the electrode patterns 92 and 96 is Connect to the negative terminal of the power supply 54. Next, the substrate 32 of the lighting unit 30 is inserted into the grooves of the gripping portions 84 </ b> A and 84 </ b> B from one end side of the frame 80 and attached to the frame 80.

  In the mounted state, as shown in FIG. 4, the electrode pattern 36 </ b> G ′ connected to one terminal (plus terminal) of the LED includes the connection portion 44 of the substrate 32, the wiring 64, the electrode pattern 60, and the electrode pattern 92 of the frame 80. , The wiring 99 and the electrode pattern 96 are connected to the positive terminal of the power source 54. On the other hand, the electrode pattern 36H ′ connected to the other terminal (minus terminal) of the LED is connected to the minus of the power source 54 via the connection portion 42, the pattern 48, the power feeding portion 46, the substrate 32, the leaf springs 88A and 88B, and the frame 80. Connected to the terminal. Then, the switch 56 is turned on, electricity is supplied from the power source 54 to the LEDs 50A to 50L and energized, the LEDs 50A to 50L are turned on, and light is emitted toward the outside. The light emitted from the LEDs 50A to 50L is incident on the light guide plate 68 and diffused by the diffusion tape 70 provided on the surface thereof. When the illumination device 20 is viewed from the outside, the light is emitted uniformly and brightly in the length direction. Looks like you are.

Thus, according to the first embodiment, there are the following effects.
(1) The lighting unit 30 in which the LEDs 50A to 50L are arranged on the insulating sheet 34 on one main surface of the conductive substrate 32 by the gripping portions 84A and 84B of the conductive frame 80 fixed to the showcase 10. Is detachably held in a sliding manner. Then, one of the terminals of the LEDs 50A to 50L is pulled out and connected to the substrate 32, and when the illumination unit 30 is mounted on the frame 80, the substrate 32 and the frame 80 are made conductive via leaf springs 88A and 88B. . Further, the other terminals of the LEDs 50 </ b> A to 50 </ b> L are drawn out to the other main surface side while penetrating the substrate 32 while being insulated from the substrate 32, and an insulating sheet 90 is interposed on the main surface of the fixing board 82. By connecting to the electrode pattern 92 provided, the power is fed only to the frame 80. For this reason, it becomes possible to mount the lighting unit 30 on the frame 80 without considering the mounting direction of the lighting unit 30, and the lighting device 20 can be easily assembled. Further, the illumination unit 32 can be attached to and detached from the frame 80 only by sliding the substrate 32 along the gripping portions 84A and 84B.

(2) Since an aluminum plate having high heat dissipation is used as the frame 80 and the substrate 32, the heat dissipation effect can be enhanced and the overall weight can be reduced.
(3) Since the LEDs 50A to 50L are used as the light source, it is possible to reduce power consumption and reduce running costs while maintaining high illumination efficiency. Moreover, temperature rise can be suppressed compared with the case where an incandescent lamp or a fluorescent lamp is used.
(4) LEDs 50A and 50B, 50C and 50D, 50E and 50F connected in parallel are connected in series, and 50G and 50H, 50I and 50J, 50K and 50L connected in parallel are connected in series. Even if one of the LEDs is poorly lit, the shortage of light for the other LED to emit light is not noticeable.
(5) Since the conductive gripping portions 84A and 84B are in surface contact with the main surface of the substrate 32 in addition to conduction due to contact between the leaf springs 88A and 88B and the side surface of the substrate 32, the substrate 32 and the frame 80 It is possible to ensure conduction more reliably.

  <Modification> FIG. 2 (B) shows a modification of the frame of this embodiment. The frame 100 shown in FIG. 2 (B) has gripping portions 104A and 104B having a substantially L-shaped cross section on both edges of one main surface of the substantially flat fixed board 102, and the gripping portions 104A and 104B. A grip portion 104C having a substantially T-shaped cross section is provided in the middle. The gripping portions 104A, 104B, and 104C are formed substantially in parallel along the longitudinal direction, and the storage portion 106A is formed by the gripping portions 104A and 104C, and the storage portion 106B is formed by the gripping portions 104C and 104B. Yes. Leaf springs (not shown) similar to those shown in FIGS. 3B and 4 are provided on the inner side surfaces 108A to 108D of the gripping portions 104A to 104C, and electricity to the substrate 32 of the illumination unit 30 is provided. Connection is possible. According to this modification, it is possible to use as a panel-shaped lighting device by mounting the lighting unit 30 in both the storage units 106A and 106B. In addition, it is possible to adjust the light amount and the irradiation range by attaching the illumination unit only to one of the storage units 106A and 106B.

  Next, Embodiment 2 of the present invention will be described with reference to FIG. FIG. 6A is an external perspective view showing the configuration of the frame of this embodiment. In the frame 150 of the present embodiment, a storage portion 156 is formed by a pair of gripping portions 154A and 154B on one main surface side of a substantially flat fixing board 152, and the fixing surface is fixed on the other main surface side. A plurality of fins 158 substantially orthogonal to the board 152 are provided in parallel. The fixed board 152 is set wider than the storage portion 156. In addition, the same leaf | plate spring as Example 1 is provided in the side surface inside the said holding | grip parts 154A and 154B (not shown). The fins 158 are for improving heat dissipation, and are formed of an aluminum plate or the like together with the fixed board 152 and the holding portions 154A and 154B. The frame 150 includes a power supply box 160 fixed so as to straddle the plurality of fins 158. One terminal of the LED pulled out in the same manner as in the first embodiment is connected to the frame 150, and further connected to a power supply terminal by connection means (not shown). According to the present embodiment, by providing the plurality of fins 158, in addition to the effect of the first embodiment, there is an effect that the temperature rise can be suppressed. Further, by integrating the power supply box 160 with the frame 150, there is an advantage that no wiring is required.

  Next, Embodiment 3 of the present invention will be described with reference to FIG. FIG. 6B is an external perspective view showing the configuration of the frame of this embodiment. The frame 200 of the present embodiment has three storage portions 206, 210, and 214 on one main surface side of a substantially flat fixed board 202 by three pairs of gripping portions 204A and 204B, 208A and 208B, 212A and 212B. Is formed. The storage units 206, 210, and 214 are arranged substantially in parallel at appropriate intervals. A leaf spring (not shown) is provided on the inner side surfaces of the gripping portions 204A, 204B, 208A, 208B, 212A, 212B. A plurality of heat radiation fins 216 substantially orthogonal to the fixed board 202 are provided on the other main surface side of the fixed board 202. A power supply box (not shown) may be provided so as to straddle the fins 216 as necessary. According to the present embodiment, since a plurality of illumination units can be held by one frame 200 and heat dissipation is excellent, a wide range of irradiation is possible. Of course, all the storage units 206, 210, and 214 may be mounted only on necessary portions without mounting the lighting units.

  Next, Embodiment 4 of the present invention will be described with reference to FIG. FIG. 7 is a main cross-sectional view of the illumination device of the present embodiment. In addition, the same code | symbol shall be used for the component which is the same as that of Example 1 mentioned above, or respond | corresponds (it is the same also about a following example). As shown in FIG. 7, magnets 110 </ b> A and 110 </ b> B are provided on both sides of the insulating sheet 58 and the electrode pattern 60 on the main surface of the substrate 32 of the lighting device 20 </ b> A on the fixed board 82 side. On the other hand, on the main surface of the fixed board 82 of the frame 80, magnets 112A and 112B are provided at positions corresponding to the magnets 110A and 110B. The magnets 110A, 110B, 112A, and 112B may be provided in a strip shape (or a line shape) along the longitudinal direction, or may be provided intermittently. According to the present embodiment, when the substrate 32 is inserted into the storage portion 86 of the frame 80, the magnets 110A and 112A are attracted and the magnets 110B and 112B are attracted, whereby the electrode pattern 60 of the substrate 32 and The electrode pattern 92 of the fixed board 82 is brought into close contact with each other, so that reliable conduction can be achieved. At this time, by setting the gap between the magnets 110A and 110B and the gap between the magnets 112A and 112B to be substantially the same, the mounting direction of the illumination unit 30 with respect to the frame 80 can be changed as in the first embodiment. Can be installed without consideration.

  Next, Embodiment 5 of the present invention will be described with reference to FIG. FIG. 8A is a main cross-sectional view of the illumination device of the present embodiment, FIG. 8B is a plan view showing the back side of the illumination unit, and FIG. 8C is a diagram showing a modification. In the first embodiment, the substrate of the illumination unit 30 is held by the gripping portions 84A and 84B provided on both edges of the frame 80. However, in this embodiment, the illumination unit is held using a magnet. It is an example. As shown in FIGS. 8A and 8B, in the lighting device 250 of the present embodiment, a magnet 252 is provided along the longitudinal direction on the back surface of the substrate 32 of the lighting unit 30A. An electrode pattern 60 insulated from the substrate 32 is provided in the central portion of the magnet 252 along the longitudinal direction, and is connected to a wiring 64 connected to one terminal of the LEDs 50A to 50L. On both sides of the electrode pattern 60, a pair of electrode patterns 254A and 254B are provided along the longitudinal direction. The electrode patterns 254A and 254B are directly formed on the substrate 32 and can be electrically connected, and are insulated from the electrode pattern 60. In this embodiment, the electrode patterns 254A and 254B are provided inside the magnet 252, but they may be provided outside.

  On the other hand, the fixed board 251 is formed of a conductive material (for example, an aluminum plate) as in the first embodiment, and a magnet 256 is provided in a substantially strip shape at the center on one main surface. ing. An electrode pattern 92 that is insulated from the fixed board 251 is provided at the center of the magnet 256 so as to be in contact with the electrode pattern 60 on the substrate 32 side. Further, a pair of electrode patterns 258A and 258B are formed directly on the fixed board 251 on both sides of the electrode pattern 92, and can be electrically connected to the fixed board 251. Is insulated. When the lighting unit 30A is mounted on the fixed board 251 by attracting the magnets 252 and 256, the electrode pattern 60 connected to one terminal (plus terminal) of the LED described above is connected to the electrode pattern 92 and the wiring of the fixed board 251. 99, is pulled out to the back side of the fixed board 251 through the electrode pattern 96, and is connected to a positive terminal of a power source (not shown). On the other hand, the substrate 32 connected to the other terminal (minus terminal) of the LED is connected to a minus terminal of a power source (not shown) via the electrode patterns 254A and 254B, the electrode patterns 258A and 258B, and the fixed board 251.

  According to the present embodiment, both of the electrode patterns connected to both terminals of the LED are drawn out to the back side of the substrate 32, and the lighting unit 30A is mounted on the fixed board 251 using the magnets 252, 256. The effects similar to those of the first embodiment can be obtained while simplifying the structure. Further, by setting the same distance between the pair of electrode patterns 254A and 254B and the electrode patterns 258A and 258B, the electrode patterns 254A and 258B and the electrode patterns 254B and 258A can be contacted. The lighting unit 30A can be easily attached to the fixed board 251 without considering the direction when the lighting unit 30A is attached. Note that, as in the modification shown in FIG. 8C, electrical connection with the substrate 32 is achieved by a conductive spring 259 provided on the fixed board 251 instead of the electrode patterns 254A, 254B, 258A, 258B. Even if it does, the same effect is acquired.

  Next, Embodiment 6 of the present invention will be described with reference to FIG. FIG. 9A is a side view showing a state before the lighting unit and the intermediate socket are connected, and FIG. 9B is a plan view of the connection of the lighting unit, the intermediate socket and the frame as seen from the back side. The illumination device 260 of the present embodiment is configured to mount a plurality of illumination units 30B on one frame 80, and an intermediate socket 270 is provided at a connection portion between the illumination units 30B. The lighting unit 30 </ b> B includes pins 262 and 264 protruding in the longitudinal direction at both ends of the substrate 32. On the other hand, the intermediate socket 270 has a block shape in the illustrated example, and has fitting portions 272 and 274 through which the pins 262 and 264 are inserted. The material constituting the intermediate unit 270 is arbitrary, but when it is made of a material having no electrical conductivity, the lighting unit is provided by leaf springs 88A and 88B provided on the frame 80 as shown in FIG. 9B. What is necessary is just to make conduction | electrical_connection between the board | substrates 32 of 30B. Of course, the pins 262 and 264 and the intermediate socket 270 may be made of a conductive material. According to the present embodiment, by using the intermediate socket 270, a plurality of lighting units 30B can be connected, so that the lighting unit can be adjusted to a desired length.

  Next, Embodiment 7 of the present invention will be described with reference to FIG. 10A to 10H are cross-sectional views showing light guides used in the lighting device of the present invention. In the above-described first embodiment, the light guide plate having a substantially rectangular cross section is used. However, the lighting device of the present invention is not limited to the shape described above, and light guides having various shapes can be used. First, in the light guide 300 shown in FIG. 10A, the light emission side (upper side in the drawing) is a curved surface portion 302 having a substantially arc-shaped cross section, and a diffusion portion 304 is formed on the surface thereof. The light guide 310 shown in FIG. 10B has a shape in which curved portions 312A and 312B having a substantially arc-shaped cross section are continuously formed on the light emission side, and a diffusion portion is formed on the surfaces of the curved portions 312A and 312B. 314A and 314B are formed.

  In the light guide 320 shown in FIG. 10C, a groove 322 having a substantially V-shaped cross section is formed on the light emission side, and diffusion portions 326A and 326B are formed on the surfaces of the inclined surfaces 324A and 324B of the groove 322. Is provided. A light guide 330 shown in FIG. 10D has a convex portion 332 having a sharp cross section on the light emission side, and diffusion portions 336A and 336B are formed on the surfaces of the inclined surfaces 334A and 334B. . A light guide 340 illustrated in FIG. 10E includes a bent portion 342 that is bent with respect to the light incident direction, and a curved surface portion 344 having a substantially arc-shaped cross section is formed on the light emission side. A light guide 350 shown in FIG. 10F includes a refracting portion 352 that is refracted in the light incident direction, and a curved surface portion 354 is formed on the light exit side. By making the shape as shown in FIGS. 10A to 10F, light incident from the light source can be reflected and refracted in a complicated manner.

  Next, the light guide plate 68A shown in FIG. 10 (G) has a light incident direction length (or thickness) longer than that of the light guide plate 68 of the first embodiment. This is a suitable example. Further, the light guide plate 68B shown in FIG. 10 (H) has a shorter light incident direction than the light guide plate 68 of the first embodiment, and is an example suitable for illuminating a relatively far distance. . The light guides 300, 310, 320, 330 and the light guide plates 68A, 68B described above are provided with the diffusion portions 302, 314A, 314B, 326A, 326B, 336A, 336B and the diffusion tape 70 on the light emission side. These diffusion means may be provided as necessary. Further, a diffusion part may be provided on the light exit side of the light guides 340 and 350.

  Next, an eighth embodiment of the present invention will be described with reference to FIG. FIG. 11 is a side view showing a use state of the present embodiment. As shown in the figure, the showcase 400 includes display shelves 408A and 408B between a support base 402 and an upper surface 404. The upper surface of the support base 402 is also used as a display shelf 408C for displaying products 410. . The display shelves 408A to 408C are slightly inclined so as to become lower from the back surface 406 toward the front side. It is configured to slide. The lighting device 20 is installed on the upper surface 404 and on the front side of the rear surfaces of the display shelves 408A and 408B. Among these, the lighting device 20 is directly attached to the upper surface 404, but is attached to the rear surfaces of the display shelves 408A and 408B via spacers 420 and 422. If the spacers 420 and 422 are not provided, the lighting device 20 attached to the display shelves 408A and 408B illuminates the vicinity of the center of the display shelves 408B and 408C, respectively. Therefore, by providing the spacers 420 and 422, the main surface of the fixed board of the lighting device 20 can be inclined with respect to the back surfaces of the display shelves 408A and 408B, and the front side of the display shelves 408B and 408C can be illuminated. it can.

In addition, this invention is not limited to the Example mentioned above, A various change can be added in the range which does not deviate from the summary of this invention. For example, the following are also included.
(1) The shape and size shown in the above embodiment are merely examples, and can be appropriately changed so as to produce the same effect. For example, the length of the lighting unit 30 may be shortened with respect to the frame 80, and a plurality of short lighting units 30 may be attached to the frame 80 fixed to the showcase 10. In that case, you may arrange | position intermittently, without attaching the lighting unit 30 continuously.
(2) Although it is desirable that the light guide plate 68 of the first embodiment is transparent, it does not prevent it from being colored. The same applies to the light guides of other embodiments.
(3) The diffusion tape 70 shown in the first embodiment is also an example, and any treatment may be applied as long as it can scatter or diffuse light.

(4) A light source other than the LEDs 50A to 50L may be used as the light source, for example, a cold-cathode tube, but an LED is most suitable in consideration of power consumption and temperature.
(5) The LEDs 50 </ b> A to 50 </ b> L may use monochromatic light emission or multicolor light emission.
(6) The number of LEDs shown in the first embodiment is also an example, and may be appropriately increased or decreased as necessary.
(7) The circuit configuration shown in the first embodiment is also an example, and the LEDs 50A to 50L may be connected in parallel, or the LEDs 50A to 50L may be connected in series one by one.

(8) The electrode lead-out structure shown in the first and fifth embodiments is also an example, and the design can be changed as appropriate so as to achieve the same effect. For example, in the first embodiment, the electrode patterns 92 and 96 on the frame 80 side may be formed in any range, and may be formed in a strip shape, or partially provided on the end side or the center of the frame 80. You may do it. Of course, the electrode pattern 60 provided on the back surface of the substrate 32 is also an example, and may be provided in a size corresponding to the connecting portion 44 instead of the belt shape. However, it is advantageous to form the electrode pattern 92 in a strip shape because it is not necessary to consider the mounting position when a plurality of short lighting units 30 are mounted.
(9) The leaf springs 88A and 88B shown in the first embodiment are also examples, and other known spring bodies can be used as long as they have the same effect.

(10) The position of the illumination device 20 provided in the showcase 10 in the first embodiment is also an example, and may be appropriately changed depending on the shape and size of the showcase 10. A plurality of lighting devices 20 may be installed. The same applies to Example 8.
(11) In the first embodiment, the present invention is applied to the long illuminating device 20. However, as shown in FIGS. 2B and 6B, a plurality of frames are provided in one frame. The lighting unit 20 may be arranged in parallel and used as a panel-shaped lighting device.

(12) The shape of the light guide shown in Example 7 is also an example, and may be appropriately changed so as to achieve the same effect.
(13) The lighting unit mounting mechanism with respect to the fixed board shown in the first and fifth embodiments is also an example, and the design can be changed as appropriate so as to achieve the same effect.
(14) The connection of the lighting units by the intermediate socket 270 shown in the sixth embodiment is also an example, and any known various types can be used as long as the same effects can be obtained, such as a structure in which the lighting units can be directly connected to each other. A coupling mechanism is applicable.

  (15) In the eighth embodiment, the front side of the display shelves 408B and 408C is used by using the spacers 420 and 422. However, the light guide 340 shown in FIG. By using a light guide having a structure in which the light emission side is bent or refracted with respect to the light incident direction as in the light guide 350 shown in FIG. The front side can be illuminated. Alternatively, the same effect as in the eighth embodiment can be obtained by setting the fixed board in advance so that the thickness of one edge and the other edge is different.

  According to the present invention, a lighting unit in which a light source is disposed on an insulating sheet on one main surface of a conductive substrate can be attached to and detached from a conductive fixing board fixed to a showcase by a holding means. Hold. Then, one terminal of the light source is pulled out and connected to the substrate, and when the lighting unit is mounted on the fixed board, the substrate and the fixed board are made conductive by the conductive means. Furthermore, while measuring the other terminal of the light source with the substrate, the electrode portion is provided on the main surface of the fixed board via an insulating means through the substrate and pulled out to the other main surface side. By connecting to the power supply circuit, the power is supplied only to the fixed board. Therefore, it can be applied to a lighting device for a showcase. In particular, the lighting unit can be easily mounted on the frame, and it is not necessary to consider the direction of the wiring at that time, which is suitable for the use of a long lighting device.

10: Showcase 12: Support base 14: Upper surface 16: Cover 18: Display board 20, 20A: Lighting device 30, 30A, 30B: Lighting unit 32: Substrate 34: Insulating sheets 36A to 36H, 36A ′ to 36H ′, 38 40: Electrode pattern 42, 44: Connection part 46: Power feeding part 48: Pattern 50A to 50L: LED (light emitting diode)
52: Resistance 54: Power supply 56: Switch 58: Insulating sheet 60: Electrode pattern 62: Through hole 62A: Insulator 64: Wiring 66: Spacer 68, 68A, 68B: Light guide plate 70: Diffusion tape 72: Screw 80: Frame 82 : Fixed board 84A, 84B: Holding part (or holding part)
85A, 85B: Side face 86: Storage part 88A, 88B: Leaf spring 89: Contact part 90, 94: Insulating sheet 92, 96: Electrode pattern 98: Through hole 98A: Insulator 99: Wiring 100: Frame 102: Fixed board 104A 104C: gripping portions 106A, 106B: storage portions 108A-108D: side surfaces 110A, 110B, 112A, 112B: magnet 150: frame 152: fixed board 154A, 154B: gripping portion 156: storage portion 158: fin 160: power supply box 200 : Frame 202: Fixed board 204A, 204B, 208A, 208B, 212A, 212B: Grasping part 206, 210, 214: Storage part 216: Fin 250: Lighting device 251: Fixed board 252, 256: Magnet 254A, 254B, 258A, 258B: Electrode pattern 59: Spring 260: Lighting device 262, 264: Pin 270: Intermediate socket 272, 274: Fitting part 300, 310, 320, 330, 340, 350: Light guide 302, 312A, 312B, 344, 354: Curved part 304, 314A, 314B, 326A, 326B, 336A, 336B: Diffusion part 322: Grooves 324A, 324B, 334A, 334B: Slope 332: Convex part 342: Bending part 352: Refraction part 400: Showcase 402: Support base 404: Upper surface 406: Rear surface 408A, 408B, 408C: Display shelf 410: Product 420, 422: Spacer

Claims (13)

A substantially strip-shaped substrate having conductivity and having one or more through-holes penetrating in the thickness direction and having an inner surface insulated;
A substantially strip-shaped insulating sheet provided on one main surface of the substrate;
A plurality of light sources arranged along the longitudinal direction on the insulating sheet;
A first electrode pattern formed between the insulating sheet and the plurality of light sources, and connected to one terminal of the plurality of light sources;
A second electrode pattern formed between the insulating sheet and the plurality of light sources and connected to the other terminal of the plurality of light sources;
A light guide that has translucency and is fixed to the substrate along a longitudinal direction thereof so that a substantially planar main surface is close to the plurality of light sources at a predetermined interval;
First extraction means for electrically connecting the first electrode pattern and the substrate;
A second lead-out means for pulling out the second electrode pattern to the other main surface side using a through hole of the substrate;
A lighting unit including:
A fixed board that has electrical conductivity and is fixed to the showcase;
Holding means for detachably mounting the board of the lighting unit on the fixed board;
Conduction means for electrically connecting the fixed board and the substrate when the substrate is mounted on the fixed board;
An electrode part formed on one main surface of the fixed board, electrically connected to the second lead means of the lighting unit, and insulated from the fixed board;
A lighting device for a showcase, comprising:   A pair of the holding means is formed on the main surface of the fixed board along the longitudinal direction, and the substrate is slidably held by engagement with both edges of the substrate. The illumination device for a showcase according to claim 1, wherein:   The lighting device for a showcase according to claim 2, wherein the holding means is conductive.   The lighting device for a showcase according to claim 1, wherein the holding means is a magnet provided on the other main surface of the substrate and one main surface of the fixed board.   The conductive means is a spring body that is fixed to the fixing board or the holding means and has electrical conductivity that contacts the side surface or the other main surface of the substrate. The lighting device for a showcase according to any one of the above.   6. The showcase according to claim 1, wherein the light guide has a shape in which a light emission side is bent or refracted with respect to an incident direction of light from the light source. Lighting equipment.   7. The light guide according to claim 1, wherein an end face shape of an end portion on the light emission side is any one of a substantially flat shape, a substantially arc shape, a tapered shape, or a combination of the shapes. The illumination device for showcases as described in any one of Claims.   The illumination device for a showcase according to claim 1, wherein a diffusion portion for diffusing light is provided on the light emission side of the light guide.   The lighting device for a showcase according to any one of claims 1 to 8, wherein a fin for heat radiation is provided on the fixed board.   The lighting device for a showcase according to claim 1, wherein the light source is a light emitting diode.   The lighting device for a showcase according to any one of claims 1 to 10, wherein an aluminum plate is used as a substrate and a fixed board of the lighting unit. Connecting means for connecting a plurality of the lighting units in the longitudinal direction;
The lighting device for a showcase according to any one of claims 1 to 11, further comprising: A spacer disposed between the other main surface of the fixed board and the mounting surface such that one main surface of the fixed board is inclined with respect to the mounting surface of the showcase;
The lighting device for a showcase according to any one of claims 1 to 12, further comprising:

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