JP2012243483A - Led unit and lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED unit capable of irradiating uniform light by preventing a mounted connector section from being darkened at connecting of an LED board in a longitudinal direction, and a lighting fixture using the LED units.SOLUTION: In the LED unit, connectors 37, 38 are mounted on a board 34 for mounting a number of LED light-emitting sections 33 in a longitudinal direction, and notches 44 corresponding to the connectors 37, 38 are formed on a lens 40 arranged in a light-emitting direction of the LED light-emitting sections 33. Thus, the lens 40 can be prevented from being interfered with the connectors 37, 38, and uniform light can be irradiated by preventing the connectors 37, 38 from being darkened since the lens 40 is arranged at a location corresponding to the connector 37, 38.

Description

  The present invention relates to a lighting device using an LED light source and a lighting fixture using the lighting device.

2. Description of the Related Art Conventionally, lighting fixtures using a plurality of LEDs as light sources at predetermined intervals in the longitudinal direction are known (see, for example, Patent Document 1).
As illustrated in FIG. 15, the illumination device 100 described in Patent Literature 1 includes a substrate holder 101 that extends in the Y-axis direction. On the upper surface in the Z-axis direction of the substrate holder 101, two rows of LED substrates 102 extending in the Y-axis direction are arranged in the X-axis direction, and two LED substrates 102 are also arranged in the Y-axis direction. The LED substrate 102 has screw holes 106 at both ends in the longitudinal direction. The LED substrate 102 is detachably fixed to the substrate holder 101 by screws through the screw holes 106.
On the upper surface of the LED substrate 102, LED elements 103 are arranged at substantially equal intervals along the Y-axis direction. A light diffusing plate 104 is disposed along the Y-axis direction in the Z-axis upward direction of the LED substrate 102. A heat dissipation structure 105 that dissipates heat generated by the LED elements 103 is installed on the lower surface of the LED substrate 102 on the Z-axis, and the heat dissipation structure 105 supports the substrate holder 101.

  An exterior cover 107 is provided on the bottom surface side in the Z-axis direction of the heat dissipation structure 105. The exterior cover 107 integrally covers the side surfaces in the X-axis direction of the heat dissipation structure 105, the substrate holder 101, and the light diffusion plate 104. Hook portions 108 are integrally formed at both ends of the exterior cover 107 in the X-axis direction, and the hook portions 108 are detachably engaged with both ends of the light diffusion plate 104 in the X-axis direction. Caps 109 are detachably provided at both ends of the exterior cover 107.

JP 2010-176904 A (FIG. 1)

  However, in the illumination device 100 described in Patent Document 1 described above, a plurality of LED substrates 102 and light diffusion plates 104 are connected in the longitudinal direction (Y-axis direction), and the adjacent LED substrates 102 are electrically connected to each other. A connector for connection is provided. At this time, if the connector is provided on the back surface of the LED substrate 102, the lighting device 100 becomes thick, and thus the connector may be provided on the mounting surface of the LED substrate 102. In such a case, there is a problem that a portion corresponding to the connector portion becomes dark.

  The present invention was made to solve the conventional problems, and when connecting the LED substrate in the longitudinal direction, the LED unit that can irradiate uniform light by preventing the mounted connector portion from becoming dark. And it aims at providing a lighting fixture.

  The LED unit of the present invention includes a substrate, a connector portion mounted on the substrate, a plurality of LED light emitting portions mounted along the longitudinal direction of the substrate, and a lens disposed in the light emitting direction of the LED light emitting portion. And a cutout portion formed in the lens corresponding to the connector portion.

  Moreover, the LED unit of the present invention includes a first lens unit and a second lens unit in which the lens is adjacent to each other along the arrangement direction of the LED light emitting units, and the second lens unit in the first lens unit. A convex portion is provided on the end surface facing the first lens portion, and a concave portion capable of engaging the convex portion is provided on the end surface of the second lens portion facing the first lens portion.

  Further, in the LED unit of the present invention, the incident surface and the emission surface at the arrangement direction end of each LED light emitting unit in the lens are in the arrangement direction of each LED light emitting unit and the light emitting direction of each LED light emitting unit. It is a curved surface centered on an orthogonal line.

  Furthermore, the lighting fixture of this invention uses the LED unit mentioned above.

  In the present invention, the connector portion is mounted on a substrate on which a large number of LED light emitting portions are mounted in the longitudinal direction, but a notch portion corresponding to the connector portion is formed on the lens arranged in the light emitting direction of the LED light emitting portion. Has been. For this reason, while preventing a connector part from interfering with a lens, by arranging a lens also in the position corresponding to a connector part, it can prevent that a connector part becomes dark and can irradiate uniform light. An LED unit and a lighting fixture can be provided.

The whole perspective view which looked at the lighting fixture of the embodiment concerning the present invention from the lower part The exploded perspective view which looked at the lighting fixture of embodiment which concerns on this invention from the downward direction Sectional drawing which passes along the center of the lighting fixture of embodiment which concerns on this invention The top view which looked at the lighting fixture of embodiment which concerns on this invention from upper direction (A) is the whole perspective view which looked at the illuminating device which connected two LED units to the longitudinal direction from the front, (B) is an exploded perspective view of (A). (A) is the whole perspective view which looked at the illuminating device which connected two LED units to the longitudinal direction from back, (B) is an exploded perspective view of (A). Front view of lighting device The perspective view seen from the back which shows the edge part of an illuminating device (A) is sectional drawing of the LED unit in a LED element position, (B) is sectional drawing of the LED unit in a connector position (A) is a perspective view which shows one end surface of a lens, (B) is a perspective view which shows the other end surface Lens top view 11 is an enlarged cross section of the XII portion cut in the horizontal direction. Plan view showing the LED unit at the end of the lighting fixture (A) thru | or (D) is process drawing which shows the procedure of the connection of a lens An exploded perspective view of a conventional LED unit

DESCRIPTION OF EMBODIMENTS Hereinafter, a lighting device and a lighting fixture according to embodiments of the present invention will be described with reference to the drawings.
In addition, in the following description, the case where a lighting fixture is attached to the ceiling surface which is a to-be-attached surface, and the downward direction is illuminated is demonstrated. Therefore, unless otherwise indicated, upper (upper, upper, etc.) means the ceiling surface side, and lower (lower, lower, etc.) means the floor surface side.

As shown in FIG. 1, the lighting fixture 10 of embodiment which concerns on this invention is suitable for attaching to the ceiling surface 11 grade | etc., Which is a to-be-attached surface, and mainly illuminating below.
As shown in FIG. 2 and FIG. 3, the lighting fixture 10 has, for example, a square plate-like fixture main body 20 having a fitting 21 for attachment to the hook ceiling 12 attached to the ceiling surface 11.

  An upper unit 30 </ b> A, an upper frame 23, and an upper panel 22 constituting the LED unit 30 that is a lighting device are provided on the upper side of the instrument body 20 (that is, on the ceiling surface 11 side). Further, a lower unit 30B constituting the LED unit 30 and a reflecting plate 24 that is a reflecting member are provided on the lower side of the instrument body 20 (that is, on the illumination direction side). A translucent panel 25 for diffusing the light is attached.

Next, the upper unit 30 </ b> A and the lower unit 30 </ b> B constituting the LED unit 30 that is the illumination device according to the embodiment of the present invention will be described.
In the following description, the LED unit 30 will be described unless the upper unit 30A and the lower unit 30B are particularly distinguished.

As shown in FIG. 4, the upper unit 30 </ b> A is provided outward in all directions on the upper side of the instrument body 20. Further, the lower unit 30B is provided at two places on the lower side of the instrument body 20, and radiates light inward.
As shown in FIG. 3, in the lighting fixture 10 using the LED unit 30 described above, the light L1 emitted toward the inside of the lighting fixture 10 from the lower unit 30B provided on the lower side of the fixture main body 20 is The light is reflected downward by the reflecting plate 24 and is incident on the panel 25 and diffuses. Thereby, the whole panel 25 becomes a light source and illuminates the lower part.
On the other hand, light L2 emitted from the upper unit 30A provided on the upper side of the fixture body 20 to the outside of the lighting fixture 10 is irradiated to the ceiling surface 11 to illuminate the ceiling surface 11 and the wall surface (not shown).

Next, the LED unit 30 will be described. Although it is mainly applied to the lower unit 30B, it can also be applied to the upper unit 30A and will be described as the LED unit 30.
As shown in FIGS. 5 and 6, in the LED unit 30, two LED units 31 </ b> A and 31 </ b> B are joined to form a long LED unit 30. This is because it is difficult to produce a printed circuit board for a long board and a component mounting facility becomes large. In addition, by shortening the length of the LED substrate 34, it is possible to use a paper phenol substrate, a glass epoxy substrate, or the like that causes warpage.

  Each LED unit 31A, 31B has a main body 32 which is a heat radiating part. The main body 32 is a single elongated member that accommodates the two LED units 31A and 31B. The main body 32 has a U-shaped cross section with a bottom surface 321, a top plate 322, and a vertical wall 323. The bottom surface 321 extends forward, and is provided with a mounting bracket 321A for mounting to the instrument body 20 and for heat dissipation. The vertical wall 323 of the main body 32 has a shape of the LED board 34 in order to improve the heat dissipation by ensuring contact with the LED board 34 and to increase the strength of the main body 32 and prevent the LED board 34 from being bent. Radiating projections 323A corresponding to the above are provided.

Further, an LED substrate (substrate) 34 is provided inside the main body 32. A lens 40 that is a light diffusion portion is attached to the front side of the LED substrate 34. On the other hand, a heat radiation sheet 36 is attached to the rear of the LED substrate 34.
Therefore, the LED substrate 34 is sandwiched between the lens 40 and the main body 32.

  As shown in FIGS. 5 and 7, a plurality of LED elements 33 as LED light emitting portions are mounted on the mounting surface of the LED substrate 34 at predetermined intervals along the longitudinal direction. At both ends in the longitudinal direction of each LED board 34, there are a connector 37 for receiving a lighting power supply from a commercial power source and a connector 38 for electrical connection with the adjacent LED board 34. The connectors 37 and 38 are provided on the mounting surface in order to reduce the size of the LED substrate 34 and avoid interference with the heat dissipation sheet 36.

As shown in FIGS. 8 and 9, the lens 40 is formed by a top plate 401, a lens plate 402, and a bottom plate 403 in a U-shaped cross section.
In the portion of the lens plate 402 facing the LED element 33, a concave groove 43 is provided over substantially the entire length in the longitudinal direction. Above and below the groove 43, there are provided total reflection portions 433 that reflect and cut light irradiated in the vertical direction in the irradiation direction. The incident surface 431 in front of the concave groove 43 is a curved surface that is convex toward the LED element 33 side.
Therefore, the light emitted from the LED element 33 enters the lens plate 402 of the lens 40 through the concave groove 43 and exits from the front surface of the lens plate 402.
It should be noted that ribs 451 and 452 are provided on the inner surface (lower surface) of the upper plate 401 and the inner surface (upper surface) of the bottom plate 403, respectively, in the width direction (front-rear direction) of the upper plate 401 and the bottom plate 403 (see FIG. 8).

Further, as shown in FIGS. 8 and 9B, at the positions where the connectors 37 and 38 are provided, the upper and lower total reflection portions 433 of the concave groove 43 are cut out (see FIG. 12), and the cutout portion 44 is obtained. Is provided. The cut-out part spreads the light from the LED element 33 in the lateral direction (horizontal direction), but because of the directivity of the LED element 33, this part is not irradiated with much light, so there is no significant influence. .
Thereby, even if the connectors 37 and 38 are provided on the mounting surface of the LED substrate 34, they do not interfere with the lens 40. Further, the light from the LED element 33 prevents the light incident on the lens 40 from entering the concave groove 43 from turning around, and the connectors 37 and 38 from being shaded.

Next, the connection of the lens 40 will be described.
As shown in FIGS. 5 and 6, the lens 40 includes a first lens portion 41 and a second lens portion 42, and is formed by connecting the first lens portion 41 and the second lens portion 42 in the longitudinal direction. . In addition, when naming the 1st lens part 41 and the 2nd lens part 42 generically, "lens 40" is displayed.
As shown in FIGS. 5 and 6, the second lens side end surface 411 of the first lens unit 41 and the first lens side end surface 421 of the second lens unit 42 are connected in contact with each other.

As shown in FIG. 10A, the second lens side end surface 411 of the first lens portion 41 is provided with, for example, a pair of convex portions 46 and 46 protruding outward. On the other hand, as shown in FIG. 10B, the first lens side end surface 421 of the second lens portion 42 is provided with a pair of concave portions 47 and 47 with which the convex portion 46 is engaged.
Accordingly, by inserting the convex portion 46 of the first lens portion 41 into the concave portion 47 of the second lens portion 42, the first lens portion 41 and the second lens portion 42 can be positioned in the vertical direction and the front-rear direction. Do.

As shown in FIG. 11, in the lens 40 (here, the first lens portion 41 is illustrated), an end portion 411 adjacent to the adjacent lens 40 is formed linearly in the width direction (vertical direction in FIG. 11). Has been.
On the other hand, at the end portion 412 not adjacent to the adjacent lens 40, a line orthogonal to the arrangement direction of LED elements 33 (left and right direction in FIG. 11) and the light emission direction of each LED element 33 (downward in FIG. 11), 11 is formed in a curved surface shape (curved surface portion 404) centered on a line orthogonal to the paper surface.
Note that the lens 40 (the first lens unit 41 and the second lens unit 42) is subjected to embossing to a predetermined position (a position corresponding to the connector 37) on the surface of the curved surface portion 404 and a flat surface portion continuous to the curved surface portion 404. It may be left.
According to this, the shadow of the connector 37 can be made more inconspicuous.
In addition, it is desirable that the incident surface 431 of the concave groove 43 provided along the longitudinal direction on the inner surface of the lens 40 is formed in a curved surface (curved surface portion 432) facing the LED element 33E at the end portion.
As a result, as shown in FIG. 13, the light emitted from the LED element 33 also wraps around the end portion by the curved surface portion 404 (see the arrow in FIG. 13) at the end portion of the LED unit 30, and enters the panel 25. Irradiated.

As shown in FIG. 11, when LED elements 33A and 33B having different color temperatures (for example, daylight white and light bulb color) are mounted, different LED elements 33A are provided outside the connector 37 connected to a commercial power source. , 33B are preferably arranged one by one.
Thereby, it can relieve | moderate that the edge part of the panel 25 of the lighting fixture 10 becomes dark, and a uniform illumination is attained.

Next, attachment of the LED substrate 34 to the lens 40 will be described. In addition, since it becomes the same operation | work about the 1st lens part 41 and the 2nd lens part 42, the 1st lens part 41 (lens 40) is demonstrated here.
As shown in FIG. 14A, first, the LED substrate 34 is positioned by the ribs 451 and 452 (see FIG. 8) provided on the upper plate 401 and the bottom plate 403 of the lens 40. A heat radiation sheet 36 is attached to the outer surface of the LED substrate 34.
That is, the ribs 451 and 452 are provided with cuts 451A and 452A corresponding to the size of the LED board 34 (see FIG. 8), and the ribs 451 and 452 are positioned by aligning the LED board 34 with the cuts 451A and 452A. The In addition, the notch 451A of the rib 451 of the upper plate 401 corresponds to the end surface of the rib 451 here.
As a result, the vertical displacement of the LED board 34 is prevented to improve the assemblability.

Next, as shown in FIG. 14B, the LED substrate 34 is aligned with the ribs 453 provided on the inner surfaces of the longitudinal end surfaces 411 and 412 of the lens 40 to perform longitudinal positioning. Thereby, the longitudinal shift of the LED substrate 34 is prevented.
The rib 453 is previously provided with a cut (not shown) corresponding to the length of the LED substrate 34.

14C, the rib 454 provided on the upper surface of the upper plate 401 of the lens 40 is inserted into the positioning hole 324 provided in the upper part of the main body 32 and positioned. Thereby, positioning of the lens 40 with respect to the main body 32 can be performed easily, and assemblability improves.
Finally, as shown in FIG. 14D, the main body 32 and the lens 40 are fixed with screws 48.

As described above, according to the LED unit 30 of the embodiment of the present invention described above, the connectors 37 and 38 are mounted on the LED substrate 34 on which a large number of LED elements 33 are mounted in the longitudinal direction. In the lens 40 arranged in the direction, a notch 44 is formed corresponding to the connectors 37 and 38.
For this reason, the connectors 37 and 38 are prevented from interfering with the lens 40, and the lenses 40 are also disposed at positions corresponding to the connectors 37 and 38, thereby preventing the connectors 37 and 38 from becoming dark and uniform. Can irradiate light.

In addition, according to the LED unit 30 of the present invention, the lens 40 includes the first lens portion 41 and the second lens portion 42 that are adjacent to each other along the arrangement direction of the LED elements 33, so that the long lens 40 is divided. Can be formed.
Further, a convex portion 46 is provided on the end surface 411 facing the second lens portion 42 in the first lens portion 41, and the convex portion 46 is provided on the end surface 421 facing the first lens portion 41 in the second lens portion 42. An engageable recess 47 is provided.
Therefore, the first lens portion 41 and the second lens portion 42 can be easily positioned and joined in the longitudinal direction so as not to be displaced, and the long LED unit 30 can be easily formed.

  Further, according to the LED unit 30 of the present invention, the incident surface 431 and the curved surface portion (outgoing surface) 404 at the end in the arrangement direction of the LED elements 33 in the lens 40 are arranged in the arrangement direction of the LED elements 33 and the LED elements 33. Since the curved surface is centered on a line orthogonal to the light emitting direction, light can also be irradiated to the side.

Furthermore, according to the lighting fixture 10 of the present invention, since the LED unit 30 described above is used, the connectors 37 and 38 are prevented from interfering with the lens 40, and the lens 40 is also provided at a position corresponding to the connectors 37 and 38. By arranging the, the connectors 37 and 38 can be prevented from becoming dark and uniform light can be irradiated.
Moreover, the long LED unit 30 can be formed easily. Further, the first lens portion 41 and the second lens portion 42 can be easily positioned and joined in the longitudinal direction so as not to be displaced, and the lighting fixture 10 using the long LED unit 30 can be easily formed.

  In addition, the LED unit 30 and the lighting fixture 10 of this invention are not limited to embodiment mentioned above, A suitable deformation | transformation, improvement, etc. are possible.

10 Lighting Equipment 30 LED Unit 33 LED Element (LED Light Emitting Unit)
34 LED substrate (substrate)
37, 38 Connector (connector part)
40 Lens 404 Curved surface (outgoing surface)
41 1st lens part 411 End face 412 End face 42 2nd lens part 431 Incident surface 44 Notch part 46 Convex part 47 Concave part

Claims (4)

A substrate,
A connector portion mounted on the substrate;
A number of LED light emitting units mounted along the longitudinal direction of the substrate;
A lens disposed in the light emitting direction of the LED light emitting unit;
An LED unit comprising: a cutout portion formed in the lens corresponding to the connector portion. The LED unit according to claim 1,
The lens has a first lens part and a second lens part adjacent to each other along the arrangement direction of the LED light emitting parts,
A convex portion is provided on an end surface of the first lens portion facing the second lens portion, and
The LED unit in which the recessed part in which a convex part can engage is provided in the end surface which faces the said 1st lens part in the said 2nd lens part. The LED unit according to claim 1 or 2,
The entrance surface and the exit surface of the LED light emitting unit in the lens in the arrangement direction end,
The LED unit which is a curved surface centering on the line orthogonal to the arrangement direction of each said LED light emission part and the light emission direction of each said LED light emission part.   The lighting fixture using the LED unit of any one of Claims 1 thru | or 3.

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