JP6467750B2 - lighting equipment - Google Patents

Description

The present invention relates to a lighting fixture.

  2. Description of the Related Art Conventionally, there has been known an emergency lighting device that is lit using power from a storage battery in an emergency when power supply from an external power source such as a commercial power source is stopped. As this type of lighting fixture, for example, a base light type lighting fixture having a long light source such as a straight tube type fluorescent lamp or a fluorescent lamp type LED lamp, which is normally used when power is normally supplied. There is what is used as a lighting fixture (for example, refer patent document 1).

  When a plurality of baselight-type lighting fixtures as described in Patent Document 1 are installed on an indoor ceiling of a predetermined area, generally, the installation interval in a cross section (A cross section) in the lateral direction of the appliance However, it installs so that it may become wider than the installation space | interval in the cross section (B cross section) of an instrument longitudinal direction. Therefore, as shown in FIG. 8, the light distribution of this type of lighting fixture is such that the light distribution in the cross section (A cross section) in the instrument short direction is larger than the light distribution in the cross section in the instrument longitudinal direction (B cross section). Is set as follows.

JP 2013-127717 A

  However, the above-described emergency lighting fixture is set so that the luminous flux with a light distribution angle of −30 ° to 30 ° is increased in order to increase the illuminance on the floor directly below the fixture so that it can be used as a normal lighting fixture. Has been. However, it is generally said that the floor illumination of an emergency lighting fixture should be 2 lux, and in the lighting fixture, the floor illumination is too high for emergency use. Emergency lighting fixtures turn on the storage battery as a driving power source when there is no commercial power supply, so if the floor illuminance is unnecessarily high, the storage battery power is consumed in a short time, and the lighting time in an emergency Will be shorter. On the other hand, if the emergency lighting output is lowered to reduce power consumption, as shown in FIG. 8 above, if the light distribution of the luminaire is set widely, the luminous flux to a wide light distribution angle is insufficient. It may become.

The present invention is to solve the above problems, it is possible to obtain a floor surface illuminance required as emergency directly below instrument also comprises an illumination equipment can be obtained a light beam required to and wide light distribution angle The purpose is to provide a lighting apparatus.

In order to solve the above problems, the present invention is a luminaire comprising an elongated main illuminating device and an emergency illuminating device attached to the main illuminating device , the emergency illuminating device comprising: An LED and an optical member that controls light distribution of the light emitted from the LED, and the optical member is incident on the incident portion and a concave incident portion that receives the light emitted from the LED. A light guide portion through which light is guided; and a convex emission portion from which light guided through the light guide portion is emitted; and an optical axis of the LED is the center of the incident portion and the emission portion The width Wa and the height Ha of the incident part satisfy the relationship of Wa / 2 ≦ Ha ≦ Wa, and the width Wb of the emission part is larger than the width Wa of the incidence part. The height Hb of the part satisfies the relationship of Wb ≧ Hb, and the outer shape of the emitting part is the incident part. The thickness of the light guide portion is monotonously increased in the region facing the periphery from the center of the light source, and is monotonously decreased in the region outside the periphery of the incident portion, and the short direction of the main lighting device When the cross section of A is the A cross section, and the cross section in the longitudinal direction of the main lighting device is the B cross section, the width Wba of the emission part and the width La of the LED in the A cross section and the width Wbb of the emission part in the B cross section And the width Lb of said LED satisfy | fills the relationship of Wba / La> = Wbb / Lb.

  According to the present invention, the optical member that emits the light from the LED with a wide light distribution can obtain the floor surface illuminance necessary for emergency use directly under the appliance, and obtain the necessary light flux even in a wide light distribution angle. be able to.

(A) is a perspective view of the lighting fixture which concerns on one Embodiment of this invention, (b) is a front view, (c) is a side view of B section, (d) is a sectional side view of B section. (A) is a perspective view of an emergency lighting device used for the lighting apparatus, (b) is a side view of the B cross section, (c) is a side view of the A cross section, and (d) is a state in which the cover in the B cross section is removed. (E) is a side view of the A section with the cover removed, (f) is a side sectional view of the B section, and (g) is a side sectional view of the A section. (A) is a side view of the B section of the optical member used in the emergency lighting device, (b) is a front view, and (c) is a side view of the A section. (A) is a sectional side view of the A section of the optical member, (b) is a sectional side view of the B section. The figure which shows the light distribution curve of the said emergency lighting apparatus. (A) is a cross-sectional side view of the B cross section in a modification of the optical member, (b) is a cross sectional side view of the A cross section, (c) is a front view, and (d) is a side view of the A cross section. The figure which shows the example of installation of the said lighting fixture, and the example of the irradiation range of light. The figure which shows the light distribution curve of the lighting fixture which uses the conventional straight tube | pipe type fluorescent lamp as a light source.

  The lighting fixture which concerns on one Embodiment of this invention is demonstrated with reference to FIGS. As shown in FIGS. 1A to 1C, a lighting fixture 1 according to the present embodiment includes an elongated main lighting device 2 and a lighting device (hereinafter referred to as an emergency lighting device 3) provided in the main lighting device 2. And). The lighting fixture 1 also includes a base 4 that holds the main lighting device 2 and the emergency lighting device 3. The base 4 integrally holds the emergency lighting device at the end in the longitudinal direction of the main lighting device 2. The appearance of the luminaire 1 is a rectangular shape when viewed from the front, and has a laterally symmetrical side shape when viewed from the lateral direction of the apparatus. In the following description, a cross section in the short direction of the main lighting device 3 is referred to as an A cross section, and a cross section in the longitudinal direction is referred to as a B cross section.

  The main lighting device 2 includes a plurality of LEDs 21 arranged in a row, a long substrate 22 on which the LEDs 21 are mounted, and a translucent member 23 through which light emitted from the LEDs 21 is transmitted (see FIG. 1 (d)). The main lighting device 2 further includes a power supply unit (not shown) that is provided inside or outside the base 4 and drives the LEDs 21 to light. This power supply unit rectifies and transforms an alternating current supplied from commercial power into a predetermined direct current necessary for lighting the LED 21.

  A plurality of LEDs 21 are arranged at regular intervals in a line along the longitudinal direction of the substrate 22. The LED 21 has an optical axis Ax in the normal direction of the substrate 22. The LED 21 is configured as an LED package by covering with a wavelength conversion member that converts the wavelength of light emitted from the LED chip. The LED 21 is not particularly limited as long as it is a light source that can emit light of a desired light color as the main illumination device 2. For example, a YAG fluorescent light is applied to a GaN blue LED chip that emits blue light having an emission peak wavelength of 460 nm. A so-called white LED that covers the body is preferably used. In addition, it is also possible to use a plurality of LEDs having different emission colors, arrange them in a row, and mix the emitted light of each LED to realize predetermined irradiation light. Examples of the combination of LEDs include white light and a light bulb color, or a combination of three primary colors (RGB). In addition, the output of these LEDs can be individually controlled to make the color temperature of the irradiation light variable.

  The substrate 22 is a long plate-like member formed so that a plurality of LEDs 21 can be mounted in a row, and as a base material, for example, a general-purpose substrate plate material such as glass epoxy resin is preferably used. It is done. On the substrate 22, a terminal portion electrically connected to a wiring pattern (not shown) for supplying power to the LED is formed on the LED mounting surface.

  The translucent member 23 has a bowl-like appearance so that the LEDs 21 arranged in a row can be covered together, and the bowl-shaped concave side surface becomes an incident portion for receiving light from the LED 21, and is convex. The shaped side surface becomes an emission part that emits light. The translucent member 23 is made of translucent polycarbonate, acrylic resin, or the like, and is preferably appropriately subjected to light diffusion treatment to prevent glare.

  The base 4 has a trapezoidal shape in a cross-sectional view orthogonal to the longitudinal direction, the lower base surface is a construction surface 41 such as a ceiling, and the upper base surface is mounted with the LED 21 that is the light source of the main lighting device 2. It becomes the mounting surface 42 of the board | substrate 22 (refer FIG.1 (c)). Further, the side surfaces 43 that connect both edges of the construction surface 41 and the mounting surface 42 are inclined so as to be continuous with the surface of the bowl-shaped translucent member 23 of the main lighting device 2. Thereby, the base 4 does not block the light emitted from the translucent member 23, and a sense of unity between the base 4 and the translucent member 23 is obtained, and the design is improved.

  The mounting surface 42 has a concave portion 44 along the longitudinal direction at the center thereof, and the long substrate 22 is provided in the concave portion 44. The base 4 is formed by pressing and cutting a plate material such as an aluminum plate or a steel plate having predetermined rigidity and heat resistance into the above shape. The mounting surface 42 may be coated with a white paint having a high visible light reflectance, or a reflective metal material may be deposited thereon.

  As shown in FIGS. 2A to 2G, the emergency lighting device 3 includes an LED unit (see FIGS. 2F and 2G) in which the LED 31 is mounted on the substrate, and the light emitted from the LED 31. And an optical member 5 that controls light distribution. The emergency lighting device 3 includes a holder 32 for holding the LED unit, a plate 33 on which the holder 32 is mounted and a space for accommodating a battery (not shown), and a plate 33. And a main body 34 for fixing the optical member 5 at a predetermined position. The LED 31 is a single LED, and an LED different from the LED 21 of the main lighting device 2 is used.

  The LED 31 has a light emitting surface configured such that the A section (see FIG. 2G) is narrower than the B section (see FIG. 2F). In this way, it is possible to reduce the width in the A section of the device while increasing the light emitting surface of the LED 31 and increasing the total emitted light flux. Therefore, it becomes easy to adapt to a long luminaire such as a base light, and the emergency illuminating device 3 can be substituted with a conventional emergency luminaire using a fluorescent lamp as a light source.

  The holder 32 is formed of a resin or metal having excellent heat resistance and a predetermined rigidity, and has a housing portion (not shown) corresponding to the outer shape of the LED unit. The plate 33 is formed of a metal plate having excellent heat conductivity such as aluminum and having a predetermined composition. The plate 33 is formed by bending the metal plate to form a concave accommodation space 33a for accommodating a battery (not shown) on the opposite side of the mounting portion of the holder 32.

  The main body 34 is formed of a resin or metal having a predetermined rigidity, and includes a holding portion 35 that holds the holder 32 and an engaging claw 36 that engages the optical member 5. The main body 34 has an attachment / detachment mechanism that allows the emergency lighting device 3 itself to be attached to and detached from the base 4. The attachment / detachment mechanism mainly includes an attachment / detachment button 37 exposed on the surface of the cover 6 and a push lever 38 (see FIG. 2F) interlocked with the attachment / detachment button 37. The push lever 38 pushes a fixing mechanism (not shown) provided at the end of the base 4 when the detachable button 37 is pressed, and releases the fixing of the main body 34 by the fixing mechanism. As a result, the user can easily release the emergency lighting device 3 simply by pressing the attach / detach button 37.

  The emergency lighting device 3 includes a cover 6 that covers the optical member 5, the main body 34, and the like. The cover 6 is a space between the saddle-shaped cover body 61, a pair of holders 62 provided at both longitudinal edges of the cover body 62, and the main lighting device 2 provided at one end of the cover body 61. And an interval holder 63 for holding the. The cover 6 is formed from a nonflammable metal material, and the outer surface of the cover main body 62 is subjected to a high reflection process such as white coating. Moreover, it is preferable that the cover 6 has a shape similar to the outer shape of the translucent member 23 of the main lighting device 2 and is formed so as to form a continuous curved surface in a state where they are adjacent to each other.

  The cover 6 includes an opening 64 for exposing the emission part of the optical member 5, and a reflection part 65 provided in the vicinity of the opening 64 and reflecting light emitted from the emission part of the optical member 5. The opening 64 is formed by cutting the outline of the cover body 61 into a substantially octagonal shape. In addition, an inclined surface that is continuous with the surface of the cover body 61 having a bowl shape is provided on the periphery of the opening 64 in the longitudinal direction (B cross section), and this inclined surface functions as the reflecting portion 65. Of the light emitted from the optical member 5, the light that has spread too much in the instrument longitudinal direction (B cross section) is reflected by the reflector 65 in the direction directly below the instrument. Thereby, the floor surface illuminance directly under the appliance can be increased efficiently.

  The pair of holders 62 are provided on both edges in the longitudinal direction of the cover body 61 so as to match the inner dimensions of the concave portion of the base 4, and at the end opposite to the detachable button 37, It has a screw hole 62a screwed to the concave portion of the base 4. Therefore, when the user presses the attach / detach button 37 to release the fixing mechanism of the base 4, the end on the attach / detach button 37 side is removed, and the emergency lighting device 3 can be rotated using the screw hole 62 a as a holding shaft. . Thereby, since the accommodation space 33a formed by the bent plate 33 opens to the outside of the appliance, the user can remove the battery (not shown) contained in the accommodation space 33a while the lighting fixture 1 is attached to the ceiling. Can be easily replaced.

  The interval holder 63 is formed so as to protrude further outward than the longitudinal direction of the cover 6. A configuration for holding the emergency lighting device 3 at a predetermined interval from the main lighting device 2 may be provided on the base 4 side. As a result, the emergency lighting device 3 is not in direct contact with the main lighting device 2, so that even if the main lighting device 2 ignites due to a fire or the like, The lighting device 3 can be prevented from becoming unlit.

  Further, the LED 31 and the optical member 5 are provided at a position eccentric to the opposite side of the main lighting device 2 from the center of the emergency lighting device 3. Corresponding to this, the opening 64 is formed at a position eccentric from the center of the cover 6 in the B cross section shown in FIG. Thereby, for example, heat when the main lighting device 2 is ignited becomes difficult to reach the LED 31, and a longer lighting time in an emergency can be secured.

  As shown in FIGS. 3A to 3C and FIGS. 4A and 4B, the optical member 5 is incident on the incident portion 51 and the concave incident portion 51 that receives the light emitted from the LED 31. It has a light guide part 52 through which light is guided, and a convex emission part 53 through which light guided through the light guide part 52 is emitted. The optical member 5 includes a rib 54 that extends outward from the bottom surface of the incident portion 51. The rib 54 is engaged with the engaging claw 36 (see FIG. 2F) of the main body 34, so that the optical axis 5 of the LED 31 of the optical member 5 passes through the centers of the incident portion 51 and the emission portion 53. Fixed to positional relationship. Further, the optical member 5 is a substantially hemisphere having an elliptical shape in a front view whose B section is slightly longer than the A section. The emission part 51 has a cutout part 53a in which four end parts parallel to the A cross section and the B cross section are cut out so as to be fitted to the substantially octagonal opening part 64. The optical member 5 is made of a translucent material such as glass, PMMA, PC, etc., and is particularly preferably made of glass which is a non-combustible material.

  In the optical member 5, the width Wa of the incident portion 51 and the height Ha from the light emission center of the LED 31 satisfy the relationship of Wa / 2 ≦ Ha ≦ Wa. Further, the width Wb of the emitting portion 53 is larger than the width Wa of the incident portion 51, and the width Wb and the height Hb of the emitting portion 53 from the light emission center of the LED 31 satisfy the relationship of Wb ≧ Hb. Further, the outer shape of the emission part 53 is formed so that the thickness of the light guide part monotonously increases in the area A1 facing the periphery from the center of the incident part 51, and in the area A2 outside the periphery of the incident part 51. It is formed to monotonously decrease. The optical member 5 configured in this manner controls light distribution so that light emitted from the LEDs 31 is emitted with a wide light distribution.

  The optical member 5 is configured such that the width Wba of the emitting portion 53 in the A section and the width La of the LED 31 and the width Wbb of the emitting portion 53 and the width Lb of the LED 31 in the B section satisfy the relationship of Wba / La ≧ Wbb / Lb. Has been. In general, a long lighting fixture such as a base light has a wider installation interval in the A cross-sectional direction than in the B cross-sectional direction. Therefore, by setting the sizes of the emission part 53 and the LED 31 of the optical member 5 as described above, it is possible to increase the amount of light emitted in the direction of the A section. Thereby, about the emergency lighting apparatus 3, the substitutability with the conventional emergency lighting fixture which uses a fluorescent lamp as a light source can be given.

  The emergency lighting device 3 including the optical member 5 and the LED 31 thus configured emits light with a light distribution as shown in FIG. That is, light can be emitted with a wide light distribution called a bad wing shape also in the A cross section and the B cross section. In particular, since the luminous flux with a light distribution angle of ± 50 ° to ± 70 ° is large and the luminous flux with a light distribution angle of −30 ° to 30 ° is small, the illuminance on the floor directly under the device increases. The light flux to a wide light distribution angle is not insufficient. In addition, since an LED that emits light with low power is used as a light source, it is possible to obtain 2 lux, which is generally the floor illumination of an emergency lighting fixture, with less power than a fluorescent lamp, and for a long time with a predetermined battery. , Can be irradiated with light.

  Further, as shown in FIG. 3B, the optical member 5 has a width r from the optical axis of the LED 31 (the point where the alternate long and short dash line intersects) between the A section and the B section (around 45 °). It is preferable that the cross section (shown by a broken line in the figure) is the largest. When a plurality of emergency lighting devices 3 are arranged in a matrix, the installation interval of each device is the largest in the 45 ° oblique direction of the device. Therefore, by designing the shape of the optical member 5 as described above, the amount of light emitted between the A cross section and the B cross section can be increased, and the floor illuminance can be made uniform. As shown in FIG. 6, the optical member 5 has a circular shape when viewed from the front, and the width r of the cross section between the A cross section and the B cross section described above (near 45 ° (indicated by a broken line in the figure)) is It may be substantially the same as the width of the B cross section.

  In the luminaire 1 configured as described above, it is preferable that the ranges irradiated with light by the main lighting device 2 and the emergency lighting device 3 correspond to each other as shown in FIG. As a result, in the normal time, the main illumination device 2 can uniformly illuminate the space with the illuminance required for visual work, and in an emergency, the emergency illumination device 3 can provide the minimum illuminance necessary for evacuation. The space can be illuminated uniformly.

  The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, in the above-described embodiment, the configuration in which the emergency lighting device 3 is provided at one end of the main lighting device 2 is shown. However, the emergency lighting device 3 may be provided at both ends of the main lighting device 2. . In this case, since light is emitted from the two emergency lighting devices 3 in the B cross-sectional direction, the optical member 5 can be configured to relatively increase the luminous flux in the A cross-sectional direction relative to the B cross-sectional direction. .

DESCRIPTION OF SYMBOLS 1 Lighting fixture 2 Main lighting device 3 Emergency lighting device (lighting device)
31 LED
4 Base 5 Optical Member 51 Incident Portion 52 Light Guide Portion 53 Emitting Portion 6 Cover 64 Opening Portion 65 Reflecting Portion Ax LED Optical Axis Ha Incident Height Hb Radiation Height Height La A Cross Section LED Width Lb B Width of LED of cross section Wa Width of incident part Wb Width of outgoing part Wba Width of outgoing part of A cross section Wbb Width of outgoing part of B cross section

Claims (7)

A lighting fixture comprising an elongated main lighting device and an emergency lighting device attached to the main lighting device,
The emergency lighting device includes an LED and an optical member that controls light distribution of light emitted from the LED,
The optical member includes a concave incident portion that receives light emitted from the LED, a light guide portion that guides light incident on the incident portion, and light that is guided through the light guide portion. A convex emission part that, and the optical axis of the LED passes through the center of the incidence part and the emission part,
The width Wa and height Ha of the incident part satisfy the relationship of Wa / 2 ≦ Ha ≦ Wa,
The width Wb of the emitting part is larger than the width Wa of the incident part, and the width Wb and the height Hb of the emitting part satisfy the relationship of Wb ≧ Hb,
The outer shape of the emitting part is monotonically increased in the area facing the periphery from the center of the incident part and monotonously decreasing in the area outside the periphery of the incident part. Formed ,
When the cross section in the short direction of the main lighting device is the A cross section and the cross section in the longitudinal direction of the main lighting device is the B cross section, the width Wba of the emitting portion, the width La of the LED, and the B in the A cross section The lighting apparatus, wherein a width Wbb of the emitting portion and a width Lb of the LED in a cross section satisfy a relationship of Wba / La ≧ Wbb / Lb. The lighting device according to claim 1, wherein a light emitting surface of the LED has a narrower A section than the B section . A cover for covering the optical member;
The said cover has an opening part for exposing the said emission part, and a reflection part provided in the vicinity of the said opening part, and reflecting the light radiate | emitted from the said emission part, The Claim 2 characterized by the above-mentioned. The luminaire described . The lighting apparatus according to claim 3, wherein the opening is formed at a position eccentric from a center of the cover in the B cross section . A base for holding the main lighting device and the emergency lighting device;
The lighting fixture according to any one of claims 1 to 4, wherein the base integrally holds the emergency lighting device at an end portion in a longitudinal direction of the main lighting device . 6. The lighting fixture according to claim 5, wherein the base holds the emergency lighting device at a predetermined interval from the main lighting device . The lighting device according to claim 5 or 6 , wherein the emergency lighting device is detachable from the base .