JP5740568B2 - lighting equipment - Google Patents

Description

  The present invention relates to a luminaire including a light emitting body that emits light in a cylindrical outer shell.

  Conventionally, a lighting fixture including a straight tube fluorescent lamp has been provided (see, for example, Patent Document 1). In the fluorescent lamp of a lighting fixture described in Patent Document 1, a pair of caps is provided on the side surface of the cylindrical glass tube, not on the end surface of the cylindrical glass tube that is the outer shell. Thus, the lighting fixture described in Patent Document 1 can emit light in the direction of the end face of the cylindrical glass tube by providing the base on the side surface portion of the cylindrical glass tube.

  On the other hand, there has been provided a lighting fixture in which a light emitting body including a plurality of LEDs (light emitting diodes) is arranged in a cylindrical cover that is an outer shell. As this kind of lighting fixture 10, as shown in FIG. 6, a rectangular box-shaped main body 2, a plate-like light emitting body 30 that is attached to the main body 2 and emits light, and a cylindrical shape that covers the light emitting body 30. The thing provided with the translucent cover 4 is proposed.

  The light emitter 30 includes a rectangular plate-shaped mounting base 33 and a plurality of plate-shaped LEDs 32 arranged on the mounting base 33. The LEDs 32 are arranged side by side along the longitudinal direction of the mounting base 33 on one surface (arrangement surface 331) that intersects the thickness direction of the mounting base 33.

  The mounting base 33 is attached by aligning the longitudinal direction with the longitudinal direction of the main body 20 and bringing the fixing surface 332 opposite to the arrangement surface 331 into close contact with the light emitter mounting surface 211 which is one surface orthogonal to the thickness direction of the main body 2. It has been.

  Further, the cover 4 is integrally provided with a peripheral wall 41 along the axis and end walls 42 provided at both ends of the peripheral wall 41 in the direction along the axis. The end wall 42 is orthogonal to the axis of the cover 4.

JP-A-9-115627

  In the lighting fixture 10 shown in FIG. 6, the LED 32 has directivity in the normal direction of the light emitting surface with one surface as the light emitting surface. Therefore, the LED 32 emits light in a direction orthogonal to the light emitter mounting surface 211 of the main body 2. Therefore, when this lighting fixture 10 is used, light is not irradiated so much toward the both end walls 42 of the cover 4. Moreover, even if it is the light which goes to the end wall 42, it will be interrupted | blocked by LED32 and the mounting base 33, and a shadow will arise in the both-ends wall 42. FIG. As a result, the end wall 42 has a lower brightness than the peripheral wall 41. Therefore, as shown in FIG. 7, when the luminaire 10 is installed with the end wall 42 of the cover 4 in contact, the luminance of the peripheral wall 41 near the end wall 42 is smaller than that of other portions. That is, when a plurality of lighting fixtures 10 are installed side by side, the lighting fixture 10 emits little light in the direction of the end wall 42 of the cover 4, so that the vicinity of the contact portion of the end wall 42 of the cover 4 (near the end wall 42). The cover peripheral wall 41) is narrower in the range of the light distribution 72 than at other locations.

  The present invention has been made in view of the above-described reasons, and has an object to provide a lighting apparatus that includes a light emitter including a plurality of LEDs and suppresses a difference in luminance between a peripheral wall and an end wall of a cover. To do.

The lighting fixture of the present invention includes an elongated light emitter, a main body that fixes the light emitter, and a light-transmitting cover that is formed in a cylindrical shape and covers the light emitter, and the light emitter is provided along one surface of the main body. The cover includes a fixed mounting base and a plurality of LEDs arranged on the surface of the mounting base, and the cover integrally includes a peripheral wall along the axis and end walls orthogonal to the axis at both ends in the direction along the axis. The mounting base is located at both ends of the main arrangement surface and intersects the main arrangement surface in a plane that includes the axis of the cover and is orthogonal to the one surface of the main body. A sub-arrangement surface extended in a direction, a part of the LEDs are disposed on the main arrangement surface, the remaining LEDs are disposed on the sub-arrangement surface, and the sub-arrangement surface is further away from the main body, Inclined to widen the distance from the end wall, Location has been the LED, characterized in that emits light in the region extending over said with the end wall of the cover peripheral wall.

In this luminaire, the main arrangement surface of the mount, in a cross section perpendicular to the axis of the cover, provided with a plurality of inclined arrangement surface disposed so as to project in a direction away from the body, a plurality each inclined placement surface More preferably, each LED is arranged.

  According to the structure of this invention, there exists an advantage that the brightness | luminance difference of the surrounding wall and end wall of a cover can be suppressed.

2 is a partially broken cross-sectional view showing Embodiment 1. FIG. It is the perspective view which abbreviate | omitted a part same as the above. It is a figure which shows the light distribution in the example of use same as the above. It is sectional drawing which shows the example of installation same as the above. (A) (b) is principal part sectional drawing which shows the lighting fixture of Embodiment 2, respectively. It is principal part sectional drawing of the lighting fixture of a prior art example. It is a figure which shows the light distribution in the example of use same as the above.

(Embodiment 1)
As shown in FIGS. 1 and 2, the lighting fixture 1 of the present embodiment includes a rectangular tube-shaped main body 2, an elongated light-emitting body 3 that emits visible light that is fixed along one surface of the main body 2, and light emission. And a translucent cover 4 covering the body 3.

  As shown in FIG. 2, the main body 2 includes a main body base portion 21 whose direction along the axis of the main body 2 is longer than the other direction, and a main body end wall 22 orthogonal to the axis. The light emitter 3 is attached to one outer surface of the main body base portion 21. Hereinafter, the surface on which the light emitter 3 is attached in the main body base portion 21 is referred to as a light emitter attachment surface 211. In the main body 2, the surface facing the light emitter mounting surface 211 may be open.

  The light emitter 3 includes a rectangular plate-shaped mounting base 31 and a plurality of LEDs 32 arranged on the surface of the mounting base 31. The LEDs (light emitting diodes) 32 are arranged side by side along the longitudinal direction of the mounting base 31. The LED 32 used in the present embodiment has a plate shape, and one surface in the thickness direction is a light emitting surface. Directivity in the normal direction of the light emitting surface. Hereinafter, the light emitting surface of the LED 32 is referred to as the “front” of the LED 32.

  As shown in FIG. 2, the cover 4 is formed in a cylindrical shape, and integrally includes a peripheral wall 41 along the axis and end walls 42 orthogonal to the axis at both ends in the direction along the axis. In this embodiment, a milky white cover 4 that has diffuse permeability and cannot be seen inside is used.

  As shown in FIG. 1, the mounting base 31 has a certain thickness except for both ends in the longitudinal direction. In the mounting base 31, one surface in the thickness direction is a fixed surface 312 that is attached in close contact with the light emitter mounting surface 211 of the main body base 21. In addition, the other surface in the thickness direction of the attachment portion 31 has a main arrangement surface 311 in the middle portion in the longitudinal direction and sub-arrangement surfaces 313 at both ends in the longitudinal direction. The sub-arrangement surface 313 is inclined from the main arrangement surface 311 toward the fixed surface 312 so as to expand in the longitudinal direction of the mounting base 31.

  A plurality of LEDs 32 are arranged on the main arrangement surface 311 of the mounting base 31 with the back surface in close contact. Hereinafter, the LEDs 32 arranged on the main arrangement surface 311 are referred to as “first LEDs 321”. The front surface of the first LED 321 is along the main arrangement surface 311. In the mounting base 31, the plurality of first LEDs 321 are arranged on the main arrangement surface 311 at intervals in the longitudinal direction of the mounting base 31 (see FIG. 1).

  In addition, one LED 32 is disposed on the sub-arrangement surface 313 with the back surface in close contact. Hereinafter, the LEDs 32 arranged on the sub arrangement surface 313 are referred to as “second LEDs 322”. The front surface of the second LED 322 is along the sub arrangement surface 313.

  In a state where the mounting base 31 is attached to the main body 2, the first LED 321 emits light in a direction perpendicular to the light emitter mounting surface 211 of the main body 2 (upward in FIG. 1). Further, the second LED 322 emits light outward in the longitudinal direction of the main body 2 with respect to the front surface of the first LED 321. That is, the second LED 322 emits light to a region straddling the end wall 42 and the peripheral wall 41 of the cover 4. Thereby, the lighting fixture 1 of this embodiment can raise the brightness | luminance of the end wall 42 of the cover 4. FIG.

  In the present embodiment, the length in the longitudinal direction of the main body 2 and the length in the direction along the axis of the cover 4 are substantially equal, and the main body end wall 22 of the main body 2 and the end wall 42 of the cover 4 are substantially flush with each other. (See FIG. 2). Therefore, as shown in FIG. 3, a plurality of lighting fixtures 1 can be installed side by side with the end wall 42 of the cover 4 in contact.

  FIG. 3 is a cross section including the mounting base 3 of the luminaire 1 of the present embodiment, and is emitted from the luminaire 1 when the end walls 42 of the two luminaires 1 are placed in contact with each other. The light intensity distribution (light distribution 71) is shown. In the luminaire 1 according to the present embodiment, the light from the second LED 322 causes the light distribution 71 in the vicinity of the contact portion of the end wall 42 of the cover 4 (the peripheral wall 41 in the vicinity of the end wall 42) and other portions. The width is almost unchanged. Therefore, even when a plurality of lighting fixtures 1 are installed side by side, it is possible to obtain a light distribution 71 with less unevenness. When a plurality of such lighting fixtures 1 are arranged in contact with the end wall 42 of the cover 4 and installed on the ceiling surface of the hallway or the like, continuous illumination without a light break is possible. Moreover, it is possible to install a plurality of lighting fixtures 1 along a certain edge of a room or the like, and to shine the whole without any breaks.

  In the present embodiment, the second LEDs 322 are arranged one by one on the sub arrangement surface 313, but depending on the light output and directivity of the second LED 322, the length and inclination of the sub arrangement surface 313, etc. A plurality of second LEDs 322 may be arranged.

Moreover, the length of the cover 4 in the direction along the axis line only needs to be able to install the lighting fixtures 1 side by side, and the cover 4 may be longer than the main body 2. The cover 4 is not limited to having diffuse transparency, and may be transparent or colored or may have a prism as long as it has translucency. Further, the first LED 321 does not need to be equally spaced in the longitudinal direction of the mounting base 31 as shown in FIG. 1 as long as it can emit uniform light in the opposite direction of the light emitter mounting surface 211. It may be an arrangement.
(Embodiment 2)
In the lighting fixture 1 of Embodiment 1, a plurality of first LEDs 321 are arranged with their front faces in a direction orthogonal to the light emitter mounting surface 211 of the main body 2. That is, the front surfaces of all the first LEDs 321 face one direction in a cross section orthogonal to the longitudinal direction of the mounting base 31. The lighting fixture 1 of the present embodiment is different from the first embodiment in that the front surface of the first LED 321 is arranged so as to face a plurality of directions in a cross section orthogonal to the longitudinal direction of the mounting base 31. Hereinafter, a cross section orthogonal to the longitudinal direction of the mounting base 31 is referred to as a “cross section of the lighting fixture 1”.

  The LEDs 32 (the first LED 321 and the second LED 322) emit light toward the front normal direction. Therefore, when the first LED 321 is arranged with the front face in the same direction, the ½ beam angle of the lighting fixture 1 is 180 ° or less in the cross section of the lighting fixture 1. The ½ beam angle of the luminaire 1 here refers to a range in which the half of the maximum luminous intensity is centered on the position of the luminaire 1 in the light distribution curve of the cross section. An angle. That is, when the ½ beam angle is 120 °, it is possible to obtain a light intensity half the center up to a range 120 ° apart from the center.

  In the lighting fixture 1 in which the plurality of first LEDs 321 are arranged in the longitudinal direction of the mounting base 31 with the front face in a direction orthogonal to the light emitter mounting surface 211 of the main body 2, light is emitted in the opposite direction of the main body 2. In the direction of the main body 2, almost no light is emitted. When such an illuminating device 1 is installed inside the ceiling surface 5 or the case 6 having an open surface, it hardly radiates in the direction inside the ceiling surface 5 or the case 6, so that the vicinity of the installation location (the ceiling surface 5 or the case 6) (see FIG. 4).

  The lighting fixture 1 of this embodiment arrange | positions 1st LED321 so that the front of 1st LED321 may face a some direction in the cross section of the lighting fixture 1. FIG. Thereby, the 1/2 beam angle of the luminaire 1 is set to 180 ° or more, and the occurrence of darkness in the vicinity of the installation location of the luminaire 1 is suppressed.

  As shown in FIG. 5A, a first surface that extends from both longitudinal sides of the main arrangement surface 315 of the present embodiment in the direction of narrowing the distance from the fixed surface 312 while spreading in the width direction of the mounting base 31. An inclined arrangement surface 316 and a second inclined arrangement surface 317 are formed. That is, in the cross section of the luminaire 1, the main arrangement surface 315, the first inclined arrangement surface 316, and the second inclined arrangement surface 317 are convex away from the main body 2 (see FIG. 5A).

  A plurality of first LEDs 321 are arranged on the main arrangement surface 315, the first inclined arrangement surface 316, and the second inclined arrangement surface 317 of the attachment base 31 along the longitudinal direction of the attachment base 31. The front surface of the first LED 321 arranged on the first inclined arrangement surface 316 and the second inclined arrangement surface 317 is left and right in the width direction of the mounting base 31 with respect to the front surface of the main arrangement surface 315 (FIG. 5A). Each direction is tilted in the direction of spreading. Therefore, in the cross section of the luminaire 1, the first LED 321 emits light around three directions. Thereby, it becomes possible to make the 1/2 beam angle of the lighting fixture 1 180 degrees or more.

  In order to set the ½ beam angle of the lighting fixture 1 to 180 ° or more, the mounting base 31 may have a shape without the main arrangement surface 315. In this case, a first inclined arrangement surface 318 and a second inclined arrangement surface 319 are formed which are two surfaces extending in a direction approaching the fixed surface 312 while being separated from the center in the width direction of the mounting base 31. That is, in the cross section of the lighting fixture 1, the 1st inclination arrangement | positioning surface 318 and the 2nd inclination arrangement | positioning surface 319 become convex in the direction away from the main body 2 (refer FIG.5 (b)).

  On the first inclined arrangement surface 318 and the second inclined arrangement surface 319 of the mounting base 31, a plurality of first LEDs 321 are arranged along the longitudinal direction of the mounting base 31, respectively. In the cross section orthogonal to the longitudinal direction of the mounting base 31, the front surface of the first LED 321 faces the target direction around the direction orthogonal to the fixed surface 312. Thereby, in the cross section of the lighting fixture 1, the 1st LED321 can radiate | emit light centering on two directions, and it becomes possible to make the 1/2 beam angle of the lighting fixture 1 into 180 degrees or more.

  As described above, in the cross section of the luminaire 1, by setting the ½ beam angle of the luminaire 1 to 180 ° or more, darkness occurs in the ceiling surface 5 or the case 6 where the luminaire 1 is installed. It can be suppressed (see FIG. 4).

  Other configurations and functions are the same as those of the first embodiment.

DESCRIPTION OF SYMBOLS 1 Lighting fixture 2 Main body 3 Light-emitting body 31 Mounting stand 311 Main arrangement | positioning surface 313 Sub arrangement | positioning surface 32 LED
4 cover 41 peripheral wall 42 end wall

Claims (2)

An elongated light emitter, a main body for fixing the light emitter, and a translucent cover that is formed in a cylindrical shape and covers the light emitter, and the light emitter is fixed along one surface of the main body. And a plurality of LEDs arranged on a surface of the mounting base, and the cover integrally includes a peripheral wall along the axis and end walls orthogonal to the axis at both ends along the axis. The mounting bases are positioned at both ends of the main arrangement surface in a plane that includes the main arrangement surface extending along the axis of the cover and includes the axis of the cover and is orthogonal to the one surface of the main body. A sub-arrangement surface extending in a direction intersecting the arrangement surface, a part of the LEDs are arranged on the main arrangement surface, the remaining LEDs are arranged on the sub-arrangement surface, The end wall of the cover as it moves away from the body Luminaire distance inclined in a direction to widen the, said LED arranged in the sub-arrangement surface, characterized in that to emit light in a region extending over said with the end wall of the cover peripheral wall. The main arrangement surface of the mounting base includes a plurality of inclined arrangement surfaces arranged so as to protrude in a direction away from the main body in a cross section orthogonal to the axis of the cover, and a plurality of each of the inclined arrangement surfaces is provided. lighting device according to claim 1, wherein the LED of each is characterized Rukoto disposed.

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