JP5556116B2 - Light source unit and lighting device - Google Patents

Description

  The present invention relates to an illumination device using an LED as a light source.

There is a technique related to an illumination device using an LED as a light source. (For example, refer to Patent Document 1.)
There is also a technique for mounting an LED on a metallic substrate. (For example, see Patent Document 2.)
Also, a flexible LED module in which an LED lamp and a brightness control circuit are arranged on a strip-shaped flexible printed circuit board and a strip-shaped base material that can be bent are bonded together, and both are laminated with a transparent heat-shrinkable tube, or by a thermoplastic resin sheet There is a technique of thermoforming the “module fixing rim” and the “module housing groove” and fixing them in a predetermined shape. (For example, refer to Patent Document 3.)

Japanese Patent Laying-Open No. 2005-293925 (see paragraph “0018”, FIG. 1) Japanese Patent No. 4214167 (paragraphs “0066” to “0077”, see FIG. 1) JP 2009-42260 A (see paragraphs “0014” to “0018”, FIG. 5).

  However, when trying to obtain high output light from the LED, there is a large amount of heat generated from the LED, and the LED element is not sufficiently dissipated, which may shorten the life of the LED element.

  In addition, since a plurality of LEDs are mounted on a planar substrate, there is a problem that the light emitting direction of the lighting device is one direction.

  In addition, in order to emit light in a plurality of directions, it is necessary to provide a reflector or lens corresponding to each LED, or to attach a plurality of substrates on which LEDs are mounted.

  An object of the illumination device according to the present invention is to provide a light source unit in which a plurality of LEDs capable of radiating LEDs are mounted while the light emission direction corresponds to the shape of the body of the illumination device.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to respond | correspond to the light emission direction according to the main body shape of an illuminating device, heat dissipation of several LED mounted in the light source unit can be performed.

1 is a perspective view showing a lighting device according to Embodiment 1. FIG. FIG. 3 is a side cross-sectional view showing the lighting apparatus of the first embodiment. It is the front view and side sectional view which show the light source unit of Embodiment 1. FIG. 3 is a side cross-sectional view showing the flexible substrate and the LED of the first embodiment. FIG. 3 is a front view showing the flexible substrate of the first embodiment. It is the front view and side view which show LED of Embodiment 1. FIG. 3 is a partially enlarged view of the flexible substrate according to the first embodiment. It is a sectional side view which shows the illuminating device of Example 1. FIG. It is the front view and side sectional view which show the light source unit of Example 1. It is a perspective view which shows the illuminating device of Example 2. FIG. FIG. 5 is a side sectional view showing a light source unit of Example 2. It is a perspective view which shows the illuminating device of Example 3. FIG. 6 is a side sectional view showing a light source unit of Example 3. FIG. It is a perspective view which shows the illuminating device of Example 4. FIG. It is the front view and side sectional view which show the light source unit of Example 4.

Embodiment 1 FIG.
FIG. 1 is a perspective view of a lighting device showing the present embodiment, and FIG. 2 is a side cross-sectional view of the lighting device shown in FIG.

  The illuminating device 100 includes a light source unit 200 and a cover unit 300 that is attached to cover the light source unit 200.

  The light source unit 200 is interposed between the LED 220, the flexible substrate 210 on which the LED 220 is mounted, the unit main body 230 attached so that the flexible substrate 210 is in surface contact, and the unit main body 230 and the LED 220. A heat dissipating pad 240 to be attached and a screw 250 (not shown) for fixing the flexible substrate 210 to the unit main body 230 are provided.

  The cover unit 300 includes a locking claw 310 that locks the unit main body 230 of the light source unit 200, a plurality of emission windows 320 that emit light from the LEDs 220 housed inside, and a periphery of the emission window 320. And a reflector 330 that controls the light emitted from the emission window 320.

  The reflection plate 330 has a mortar shape, and includes a pressing piece 331 that comes into contact with the LED 220 housed inside on the emission window 320 side. The pressing piece 331 contacts the LED 220 and pushes the LED 220 toward the unit main body 230.

  Thus, since LED220 is pushed by the reflecting plate 330, the contact property of LED220 and the thermal radiation pad 240 and the thermal radiation pad 240 and the unit main body 230 can be improved (a contact area is enlarged). Therefore, the heat generated by the LED 220 is easily transferred by the unit main body 230 via the heat dissipation pad 240.

  Further, since the LED 220 is pushed by the reflecting plate 330, the LED 220 can be fixed at a predetermined position of the unit main body 230.

Next, the detailed structure of the light source unit 200 will be described.
FIG. 3 is a front view (a) and a side sectional view (b) showing the light source unit showing the present embodiment, and FIG. 4 is a side sectional view of the flexible board and the LED mounted on the flexible board. 5 is a front view of the flexible substrate, FIG. 6 is a front view (a) and a side view (b) of the LED, and FIG. 7 is a partially enlarged view of the flexible substrate.

  The LED 220 includes an LED main body 221, a light emitting unit 222 on which the LED element is mounted, a heat radiating unit 223 that radiates heat generated when the light emitting unit 222 emits light on the back surface of the light emitting unit 222, and both sides of the LED main body 221. A lead portion 224 to be attached is provided.

The flexible substrate 210 is attached to one surface of the sheet portion 211 that can be bent and deformed, the pattern portion 212 having an insulating layer on the surface, the pattern portion 212 exposed, and the lead portion 224 of the LED 220. The LED 220 is mounted between the pad portion 213 to be soldered and the two pad portions 213, and the opening 214 is opened at a position corresponding to the heat dissipation portion 223 of the mounted LED 220. provided with two slits 215 provided in substantially flat row, the mounting holes 216 which are mounted in a screw 250 to the unit main body 230 of the light source unit 200 Te.

  The slit 215 stresses the pad portion 213 and the pattern portion 212 that are disposed in the vicinity of the LED 220 and the LED 220 when the flexible substrate 210 is bent or when the LED 220 is pressed against the unit main body 230 by the reflector 330. The flexible substrate 210 in the vicinity where the LED 220 is mounted can be deformed so as not to be applied.

  The slit 215 includes a substantially straight linear portion A and a curved portion B, and has an elliptical shape.

  The slit 215 may have a rectangular shape. However, when the flexible substrate 210 is bent, stress concentrates on the corners of the slit 215, so depending on the degree of bending of the flexible substrate 210 (for example, bending of 90 ° or more) There is a risk of breaking from the part.

  However, when the straight part A and the curved part B are combined, the corners of the slit 215 disappear, the stress is dispersed, and even if the degree of bending (for example, bending of 90 ° or more) becomes severe, it is difficult to break.

  Therefore, it is preferable to combine the straight portion A and the curved portion B so that the slit 215 has as few corners as possible.

  The curved portion B may not be entirely formed by a curved line, and may be a combination of a substantially linear portion and a curved portion. In short, a curved portion so that the slit 215 has no corners. May be provided.

  As described above, since the two slits 215 are provided along the mounted LED 220, the stress applied to the LED 220 and the pad portion 213 and the pattern portion 212 in the vicinity of the mounted LED 220 is distributed even when the flexible substrate 210 is curved. The flexible substrate 210 can be attached in accordance with the shape of the unit main body 230 (the lighting device 100, the light source unit 200, and the cover unit 300).

  The unit main body 230 is made of metal such as aluminum having good thermal conductivity. The unit main body 230 has a function of radiating heat into the air to dissipate heat.

  The heat dissipating pad 240 is in contact with the LED 220 and the unit main body 230, and heat generated by the LED 220 is conducted to the unit main body 230 and diffused to dissipate the heat generated by the LED 220. The heat dissipating pad 240 uses a silicon sheet or silicon grease, which is a member having good thermal conductivity. When an elastic material is used, the contact property with the LED 220 or the unit main body 230 is increased, and the heat generated by the LED 220 is increased. Increases heat dissipation.

  The heat dissipating pad 240 is inserted into the opening 214, contacts the heat dissipating part 223 of the LED 220, and conducts heat generated by the LED 220 to other members (such as the unit main body 230).

  As described above, the opening 214 is provided at a position corresponding to the heat radiation part 223 of the LED 220 to be mounted, and the heat radiation pad 240 is inserted into the opening 214, so that the heat generated by the LED 220 can be sufficiently radiated.

  In the present embodiment, the shape in which the heat dissipation pad 240 is inserted into the opening 214 of the flexible substrate 210 and is brought into contact with the LED 220 and the unit main body 230 has been described, but the heat dissipation pad 240 is more than the opening 214 of the flexible substrate 210. A convex portion having a small shape and a wide portion having a shape larger than the opening 214 may be provided, and at least the convex portion may be in contact with the heat radiating portion 223 of the LED 220.

  In this embodiment, the case where the heat radiating pad 240 such as a silicon sheet is used as the heat radiating member attached between the heat radiating portion 223 of the LED 220 and the unit main body 230 has been described. However, the heat generated by the LED 220 is generated by the unit main body. Any member may be used as long as it is a member that conducts heat to 230, and may be a filler such as silicon or urethane.

  Further, the heat radiating portion 223 and the unit main body 230 may be directly contacted without attaching the heat radiating member such as the heat radiating pad 240 between the heat radiating portion 223 of the LED 220 and the unit main body 230. When the heat radiating member is interposed, for example, even if the heat radiating portion 223 of the unit main body 230 or the LED 220 has fine irregularities, the heat radiating portion 223 of the unit main body 230 or the LED 220 is made to radiate by the elasticity of the heat radiating pad 240. It is preferable to use a heat radiating member such as the heat radiating pad 240 because it is easy to come into surface contact with the heat radiating member such as 240 and contributes to heat radiation (thermal conduction) of the LED 220.

Example 1.
This example shows another usage pattern of the illumination device (light source unit) of the first embodiment.

  Parts similar to those described in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  FIG. 8 is a side cross-sectional view of the lighting apparatus of the present embodiment, and FIG. 9 is a front view (a) and a side cross-sectional view (b) of the light source unit of the present embodiment.

  The illumination device 100a includes a light source unit 200a and a cover portion 300a attached so as to cover the light source unit 200a.

  The light source unit 200a is interposed between the LED 220, the flexible substrate 210 on which the LED 220 is mounted, the unit main body 230a attached so that the flexible substrate 210 is in surface contact, and the unit main body 230a and the LED 220. A heat dissipating pad 240 to be attached and a screw 250 (not shown) for fixing the flexible substrate 210 to the unit main body 230a are provided.

  The unit main body 230a has an inclined portion 231 (convex portion), and the inclined portion 231 sets the direction in which the LED 220 irradiates.

  The cover portion 300a includes a locking claw 310 that is locked to the unit main body 230a of the light source unit 200a, a plurality of emission windows 320 that emit light from the LEDs 220 housed inside, and a periphery of the emission window 320. And a reflector 330a for controlling the light emitted from the exit window 320.

  The reflection plate 330a has a mortar shape, and includes a pressing piece 331a that comes into contact with the LED 220 housed inside on the emission window 320 side. The pressing piece 331a contacts the LED 220 inclined by the inclined portion 231 and pushes the LED 220 toward the unit main body 230a.

  Thus, the heat dissipation pad 240 is attached to the inclined portion 231 of the unit main body 230a, and the flexible substrate 210 is mounted so that the heat dissipation portion 223 of the LED 220 is in contact with the heat dissipation pad 240.

  Since the light source unit 200a is formed of the flexible substrate 210 that can be bent and bent, the light emitting direction of the LED 220 is determined by the inclined portion 231 of the unit main body 230.

  As described above, the flexible substrate 210 and the unit main body 230a can be brought into contact with each other, the LED 220 can be thermally connected to the unit main body 230a through the heat dissipation pad 240, and the light emission direction of the LED 220 can be different from the one surface direction. can do.

  The heat radiating part 223 and the unit main body 230a may be brought into direct contact without attaching the heat radiating pad 240 between the heat radiating part 223 of the LED 220 and the unit main body 230a, but if the elastic heat radiating pad 240 is interposed, the unit main body When the angle of the LED 220 mounted on the flexible substrate 210 with respect to 230a is other than 0 °, the heat radiation part 223 of the LED 220 and the heat radiation pad 240 are in surface contact and contribute to heat radiation of the LED 220. Therefore, the heat radiation pad 240 is used. Is preferred.

Example 2
This example shows another usage pattern of the illumination device (light source unit) of the first embodiment.

  Parts similar to those described in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  FIG. 10 is a perspective view of the lighting device of the present embodiment, and FIG. 11 is a side sectional view of the light source unit of the present embodiment.

  The illuminating device 100b includes a light source unit 200b bent into a “he” shape and a cover portion 300b attached to cover the light source unit 200b.

  The light source unit 200b includes an LED 220, a flexible substrate 210 on which the LED 220 is mounted, a unit main body 230b that is formed by being bent in a “h” shape and attached so that the flexible substrate 210 is in surface contact, and the unit A heat dissipating pad 240 attached so as to be interposed between the main body 230b and the LED 220 and a screw 250 (not shown) for fixing the flexible substrate 210 to the unit main body 230b are provided.

  The cover portion 300b includes a locking claw 310 (not shown) that locks the unit main body 230b of the light source unit 200b, a plurality of emission windows 320 that emit light from the LEDs 220 housed inside, and the emission windows 320. And a reflector 330 that controls the light emitted from the exit window 320.

  Thus, since the light source unit 200b is formed of the flexible substrate 210 that can be bent and bent, the light source unit 200b can be bent along the bent portion of the unit main body 230b.

  Therefore, the flexible substrate 210 and the unit main body 230b can be contacted, and the heat of the heat radiating part 223 of the LED 220 can be easily conducted to the unit main body 230b via the heat radiating pad 240.

Example 3
A present Example shows the other usage pattern of the illuminating device (light source unit) of Example 2. FIG.
Parts similar to those described in the first embodiment, the first embodiment, and the second embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  FIG. 12 is a perspective view of the lighting device of the present embodiment, and FIG. 13 is a side sectional view of the light source unit of the present embodiment.

  The illumination device 100c includes a light source unit 200c that is bent so that the shape viewed from the side surface is substantially a trapezoidal shape, and a cover portion 300c that is attached so as to cover the light source unit 200c.

  The light source unit 200c is an LED 220, a flexible substrate 210 on which the LED 220 is mounted, a unit formed by being bent so that the shape seen from the side surface is substantially trapezoidal, and attached so that the flexible substrate 210 is in surface contact. A main body 230c, a heat dissipating pad 240 attached so as to be interposed between the unit main body 230c and the LED 220, and a screw 250 (not shown) for fixing the flexible substrate 210 to the unit main body 230c are provided.

  The cover portion 300c includes a locking claw 310 (not shown) that is locked to the unit main body 230c of the light source unit 200c, a plurality of emission windows 320 that emit light from the LEDs 220 housed inside, and the emission windows 320. And a reflector 330 that controls the light emitted from the exit window 320.

  In this example, other configurations and effects are the same as those of the first embodiment, the first example, and the second example, and thus the description thereof is omitted.

Example 4
This example shows another usage pattern of the illumination device (light source unit) of the first embodiment.

  Parts similar to those described in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  FIG. 14 is a perspective view of the lighting device of the present embodiment, and FIG. 15 is a front view (a) and a side sectional view (b) of the light source unit of the present embodiment.

  The lighting device 1b includes a unit main body and a cover portion attached to the unit main body.

  The illumination device 100d includes a light source unit 200d that is bent so that the shape viewed from the side surface is substantially L-shaped, and a cover portion 300d that is attached so as to cover the light source unit 200d.

  The light source unit 200d is formed by bending an LED 220, a flexible substrate 210 on which the LED 220 is mounted, a bent shape so that a bent portion is a curved surface (curved portion 232) when viewed from the side, and a curved portion (curved portion 232). A unit main body 230d attached so that the substrate 210 is in surface contact, a heat dissipating pad 240 attached so as to be interposed between the unit main body 230d and the LED 220, and a screw 250 (not shown) that fixes the flexible substrate 210 to the unit main body 230d. Not).

  The cover portion 300d includes a locking claw 310 (not shown) that locks the unit main body 230d of the light source unit 200d, a plurality of emission windows 320 that emit light from the LEDs 220 housed inside, and the emission windows 320. And a reflector 330 that controls the light emitted from the exit window 320.

  Thus, since the light source unit 200d is formed of the flexible substrate 210 that can be bent and bent, it can be bent along the curved surface (curved portion 232) of the unit main body 230d.

  Therefore, the flexible substrate 210 and the unit main body 230d can be brought into contact with each other, and the heat radiation portion 223 of the LED 220 can be thermally connected to the unit main body 230d via the heat radiation pad 240.

  Further, when the LED 220 is disposed on the curved surface (curved portion 232) where the light source unit 230d is curved, the LED 220 cannot be deformed, but the flexible substrate 210 can be curved by the slit 215, and the heat radiation pad 240 can be curved. Due to the elastic force, the heat radiating part 223 of the LED 220 and the light source unit 230a are in surface contact with each other, and the thermal conductivity transferred from the heat radiating part 223 to the light source unit 230a can be increased.

  In this example, other configurations and effects are similar to those of the first embodiment and Examples 1 to 3, and thus the description thereof is omitted.

  100, 100a, 100b, 100c, 100d Illumination device, 200, 200a, 200b, 200c, 200d Light source unit, 210 Flexible substrate, 211 Sheet portion, 212 Pattern portion, 213 Pad portion, 214 Opening portion, 215 slit, 216 Mounting hole 220 LED, 221 LED main body, 222 light emitting section, 223 heat radiating section, 224 lead section, 230, 230a, 230b, 230c, 230d unit main body, 231 inclined section, 232 curved section, 240 heat radiating pad, 300, 300a, 300b, 300c, 300d cover part, 310 locking claw, 320 exit window, 330, 330a reflector, 331, 331a holding piece, A part linear part, B part curved part.

Claims (4)

An LED, a heat dissipating member in contact with the LED, an opening into which the heat dissipating member can be inserted, and two slits arranged substantially in parallel in the vicinity of the opening. The LED is mounted so as to be closed, and includes a flexible substrate that can be bent and deformed, and a unit main body to which the flexible substrate is attached ,
Said unit body is in contact with the LED through the heat dissipation member, the two of the slits, the light source unit, wherein Rukoto includes a convex portion for tilting the LED in either direction.   The light source unit according to claim 1, wherein the flexible substrate is formed of a straight portion and a curved portion, and has two slits that are arranged substantially in parallel. The light source unit according to claim 1 or 2,
At least the attached on the side of the flexible substrate LED is mounted, the lighting apparatus characterized by comprising a pressing piece which presses the LED to the unit body opposite to the emitting surface of the light source unit. The lighting device according to claim 3 , wherein the pressing piece is formed integrally with the lens or the reflecting plate.

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