JP2019012645A - Lighting device - Google Patents

Abstract

To provide a lighting device which achieves high luminous efficiency.SOLUTION: A lighting device 1 of the invention includes: an elongated device body 10 attached to a ceiling surface; a light source comprising a substrate 20 on which light emitting elements 21 are mounted and a holding member 22 which holds the substrate 20; and an elongated cover unit 30 which is detachably attached to the lower side of the device body 10 with the light source attached to its upper part. An opening 32c is formed at the upper part of the cover unit 30 so that the light emitting elements 21 are exposed to the interior of the cover unit 30. The peripheral parts 32d, 32e at both longitudinal sides of the opening 32c in the upper part of the cover unit 30 incline to a direction of a lower part of the cover unit 30.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an illuminating device using an LED as a light source, and more particularly to an illuminating device installed on a ceiling surface constituted by an instrument body and a cover unit.

  A lighting fixture that uses an LED as a light source and is attached to a ceiling surface is mainly configured by a fixture main body that is a base and a cover unit that is a light emitting unit, and an LED mounting board is built in the cover unit. For example, Patent Document 1 includes a cover unit that includes an LED mounting substrate on which a plurality of LED chips used as a light source are mounted, and a fixture main body that has an attachment structure to a ceiling surface and holds the cover unit. An illumination device is disclosed.

  In the illumination device shown in Patent Document 1, a cover unit transmits, diffuses, and reflects illumination light from the LED (corresponding to the lower part of the cover of the present application), and illumination light partially reflected by the front cover portion is again used. It has a back cover part (corresponding to the upper part of the cover of the present application) that reflects and diffuses toward the front cover part, and the LED mounting board is sandwiched and fixed between the back cover part and the board holder. It has become.

No. 2015-115517

  In the illumination device shown in Patent Document 1, there is an opening formed along the longitudinal direction at the center of the back cover portion of the cover unit, and a light source (LED) mounted on the substrate is exposed from the opening. Therefore, there is a problem that the light component in the horizontal direction emitted from the light source cannot be reflected in the direct downward direction, and the light emission efficiency is lowered.

  This invention is made | formed in view of such a point, and it aims at providing the illuminating device with high luminous efficiency.

  In order to achieve the above-described object, the present invention provides a long tool body attached to a ceiling surface, a light source composed of a substrate on which a light emitting element is mounted and a holding member that holds the substrate, and the light source on the top. An elongate cover unit that is detachably attached to the lower side of the instrument main body, and the light emitting element is directed toward the inside of the cover unit at an upper portion of the cover unit. An illumination device is provided, wherein an opening is formed so as to be exposed, and peripheral portions on both sides in the longitudinal direction of the opening in the upper portion of the cover unit are inclined toward the lower portion of the cover unit. (Invention 1).

  According to the said invention (invention 1), the horizontal light component radiate | emitted from the light emitting element of a light source is reflected in a directly downward direction by the peripheral part of the longitudinal direction both sides of the opening part which inclines in the lower part direction of a cover unit. Therefore, it is possible to provide a lighting device with high luminous efficiency in which the illuminance in the direct downward direction is improved.

In the above invention (Invention 1), the cover unit causes the illumination light from the light source to diffusely transmit / diffuse and reflect the illumination light, and the illumination light partially diffused and reflected by the cover lower part is directed again to the cover bottom. It consists of the upper part of the cover that diffusely reflects
It is preferable that the lower cover portion and the upper cover portion are integrally formed so that the lower cover portion is located below the cover unit and the upper cover portion is located above the cover unit (Invention 2).

  In the said invention (1,2), it is preferable that the edge part near the said opening part of the said peripheral part is curving in the direction which goes to the said board | substrate side (invention 3).

  According to the above invention (Invention 3), since the edge of the peripheral portion is curved in the direction toward the substrate, the light component in the horizontal direction emitted from the light emitting element of the light source is more efficiently reflected downward. Can be made.

  In the said invention (invention 1-3), the said holding member is equipped with a pair of board | substrate engaging part for hold | maintaining the said board | substrate, and the edge part near the said opening part of the said peripheral part is said board | substrate engagement. It is preferable to contact the part (Invention 4).

  In the said invention (invention 4), when the said cover unit has not attached the said light source to the upper part, it is preferable that the inclination degree of the said peripheral part is larger than the state which attached the said light source to the upper part (invention 5). .

  According to the above invention (invention 5), the periphery of the cover unit is more inclined when the light source is not attached to the upper part. This means that the substrate engaging part is in the periphery when the light source is attached to the upper part. The urging force that pushes the part downward acts, so that the fixed state between the cover unit and the instrument body can be further stabilized.

  According to the present invention, the horizontal light component emitted from the light emitting element of the light source can be reflected directly downward by the peripheral portions on both sides in the longitudinal direction of the opening that is inclined downward in the cover unit. In addition, it is possible to provide a lighting device with high luminous efficiency in which the illuminance in the direct downward direction is improved.

It is a principal part perspective view which shows the structure of the illuminating device which concerns on one Embodiment of this invention. It is sectional drawing which shows the structure of the illuminating device which concerns on the same embodiment. It is sectional drawing which shows the state which rotated and removed the cover unit of the illuminating device which concerns on the embodiment from the instrument main body. It is a cross-sectional schematic diagram which shows the breadth of the light ray in the cover unit of the illuminating device which concerns on the embodiment. It is a cross-sectional schematic diagram which shows the structure of the cover unit of the illuminating device which concerns on the same embodiment. It is a cross-sectional schematic diagram of a cover unit which shows the change of the shape of the state which removed the light source from the cover unit of the illuminating device which concerns on the embodiment, and the state which attached the light source.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a main part perspective view showing a configuration of a lighting device 1 according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing the configuration. The illuminating device 1 includes an instrument body 10 having a mounting structure on a ceiling surface, and a long cover unit 30 containing a long mounting substrate 20 on which a plurality of LEDs 21 used as a light source are mounted. A plurality of LEDs 21 are mounted on the mounting substrate 20 at equal intervals in the length direction. The cover unit 30 is detachably attached to the lower side of the instrument body 10 with the mounting substrate 20 attached to the top. In FIG. 1, the cover unit 30 is illustrated with the left side removed to show the mounting substrate 20.

  The instrument main body 10 has slanted portions 10a and 10b on the left and right sides when viewed in the width direction, a vertical section 10e and 10f on the left and right, and a horizontal section 10g on the ceiling side. It is a scale-shaped member, for example, made of a single metal plate. As described above, the instrument body 10 has the inclined portions 10a and 10b, so that the side surface in the longitudinal direction of the instrument body 10 is an inclined side surface that is inclined inward from the ceiling surface side toward the side on which the cover unit 30 is mounted. ing.

  The instrument main body 10 is fixed to the ceiling by fixing a wood screw from a hole drilled in the horizontal portion 10g or by screwing a nut (not shown) to an anchor bolt (not shown) from the ceiling. Can be attached and fixed. In addition, in a space formed by the vertical portions 10e and 10f and the horizontal portion 10g of the instrument body 10, a power supply unit (not shown) for supplying power to the mounting substrate 20 on which the LEDs 21 that are light emitting elements are mounted and a locking member 34 are provided. The V-shaped coil spring 40 is accommodated. An attachment member 11 having a long hole (not visible in FIGS. 2 and 3 due to the cross-sectional position) for attaching the V-shaped coil spring 40 is fixed to the horizontal portion 10g of the instrument body 10 with a screw or the like.

  The mounting board 20 is held by a holding member 22, and the mounting board 20 is attached to the upper part of the cover unit 30 via the holding member 22. Fitting grooves 22 a and 22 b for attaching the cover unit 30 are formed on both sides in the width direction of the holding member 22, and a pair for holding the mounting board 20 in the center in the width direction of the holding member 22. Board engaging portions 22c and 22d are formed.

  The cover unit 30 is a long member integrally formed of plastic composed of a cover lower part 31 having diffuse transmission / diffuse reflectivity and a cover upper part 32 having diffuse reflectivity, and is almost the same as the instrument body 10. It extends in the length direction. The cover lower part 31 generally constitutes the lower part of the cover unit 30 and diffuses / transmits / reflects the illumination light from the light source. The cover upper part 32 generally constitutes the upper part of the cover unit 30, and diffuses and reflects the illumination light partially diffused and reflected by the cover lower part 31 toward the cover lower part 31 again. The cover lower portion 31 and the cover upper portion 32 are integrally formed members, but have different optical characteristics. Therefore, in FIGS. 2, 3 and 4, the members 31 and 32 are shown as cross-sections with diagonal lines at different angles in order to show that the optical characteristics are different. Specifically, a hatched portion with a left-down oblique line is a cover lower portion 31, and a hatched portion with a right-down oblique line is a cover upper portion 32.

  In order to clarify the structure of the cover unit 30, FIG. 5 shows a schematic cross-sectional view of only the cover unit 30. In FIG. 5, a white-painted portion (lower portion of the cover unit 30) is the cover lower portion 31, and a black-painted portion (upper portion of the cover unit 30) is the cover upper portion 32. Note that the cross-section fill in FIG. 5 is for illustrative purposes, and does not indicate that such color shading is actually applied.

  The cover lower portion 31 is inclined at both ends in the width direction to form inclined portions 31a and 31b, and a flat portion 31c having a flat center. Since the inclined portions 31a and 31b of the cover lower portion 31 have the same inclination angles as the inclined portions 10a and 10b of the instrument body 10, the side surface in the longitudinal direction of the cover unit 30 is formed substantially parallel to the side surface of the instrument body 10. However, in the portion where the cover unit 30 is attached to the instrument main body 10, that is, in the portion where the edges of the inclined portions 10 a and 10 b of the instrument main body 10 abut on the cover unit 30, Both side surfaces in the longitudinal direction are located outside in the width direction with respect to the side surfaces in the longitudinal direction of the instrument body 10 on the same side. Therefore, when the cover unit 30 is attached to the instrument body 10, a step is generated between the inclined parts 31 a and 31 b of the cover lower part 31 and the inclined parts 10 a and 10 b of the instrument body 10.

  Thus, in the portion where the cover unit 30 is attached to the instrument body 10, the side surface in the longitudinal direction of the cover unit 30 is located outside in the width direction relative to the longitudinal side surface of the instrument body 10 on the same side. Accordingly, a step is generated, and an operator or the like can use the step to hold the cover unit 30 with his / her finger, so that the cover unit 30 can be easily detached from the instrument body 10. Further, with this structure, it is not necessary to make the side surface of the cover unit 30 easy to be gripped by an operator or the like, and the shape of the cover unit 30 can be formed so as to increase the light emission efficiency.

  In particular, in the present embodiment, the both side surfaces in the longitudinal direction of the cover unit 30 are configured so as to be positioned outside in the width direction with respect to the side surfaces in the longitudinal direction of the instrument body 10 on the same side. Therefore, it is possible to make it easier for an operator or the like to hold the cover unit 30 with his / her finger and to design the lighting device 1 with a balanced appearance. In addition, the design of the illumination device 1 as a whole can be made beautiful by designing the cover unit 30 and the instrument main body 10 so that there is an intentional gap.

  The cover lower portion 31 of the cover unit 30 has flanges in which the edge portions 311a and 311b on the side of the inclined portions 31a and 31b attached to the instrument main body 10 protrude in the direction along the inclined portions 10a and 10b of the instrument main body 10, respectively. It is formed in a shape. Since the flange is formed at the side edge of the cover unit 30 as described above, it is easier for an operator or the like to put the finger on the cover unit 30 and grasp it.

  The cover upper portion 32 of the cover unit 30 is formed with claw portions 32 a and 32 b protruding in the direction of the instrument body 10 in the vicinity of both ends in the width direction, and fitting grooves 22 a and 22 b provided on both sides of the holding member 22. Respectively. In addition, an opening 32c is formed at the center of the cover upper portion 32, and the LED 21 mounted on the mounting substrate 20 is exposed toward the inside of the cover unit 30 through the opening 32c.

  Peripheral portions 32d and 32e that are inclined in the lower direction of the cover unit 30 are formed on both sides in the longitudinal direction of the opening 32c of the upper portion 32 of the cover. The edge portions 321d and 321e in the vicinity of the openings 32c of the peripheral portions 32d and 32e are curved in the direction toward the mounting substrate 20, and the edge portions 321d and 321e are the substrate engaging portions 22c and 22d of the holding member 22. Is brought into contact with the substrate engaging portions 22c and 22d of the holding member 22. Note that the edge portions 321d and 321e are not in contact with the mounting substrate 20.

  Since the peripheral portions 32 d and 32 e are inclined toward the lower portion of the cover unit 30, a space 33 is formed between the cover upper portion 32 of the cover unit 30 and the holding member 22. By providing the space 33, when fixing a power source or the like to the surface of the holding member 22 on the side where the mounting substrate 20 does not contact, a fixing element (for example, a fixing member for fixing the power source or the like) Since the head of the screw or the like can be positioned in the space 33, it can be removed from the region where the illumination light is diffusely reflected.

  Further, since both side surfaces (inclined portions 31a and 31b) in the longitudinal direction of the cover lower portion 31 are inclined, a substantially inverted trapezoidal space is formed between the cover lower portion 31 and the cover upper portion 32, as will be described later. Directional illumination light emitted from the LED 21 repeats diffuse reflection except for some light beams that diffusely transmit in this space. By making the cover unit 30 into such a shape, the lighting device 1 is optically diffusive and has high luminous efficiency.

  The cover lower portion 31 and the cover upper portion 32 of the cover unit 30 are formed using a known double mold (two-color molding), and the cover unit 30 is formed in the same mold after forming the cover lower portion 31 on the primary side. The cover upper part 32 as the secondary side is formed integrally with the cover lower part 31 on the primary side (the primary side may be the cover upper part 32 and the secondary side may be the cover lower part 31). For the cover lower part 31 and the cover upper part 32, for example, polycarbonate (or acrylic) is used. The cover lower part 31 has diffuse transmittance / diffuse reflectivity, and the cover upper part 32 has diffuse reflectivity.

  In the present embodiment, the cover lower part 31 and the cover upper part 32 having different optical characteristics are integrally formed, so that it is not necessary to separately attach a reflection member or the like inside the cover unit 30 and the assembling work is facilitated.

  The cover lower part 31 can be molded by mixing a pigment, and can be colored yellow, for example. In this way, when the cover lower portion 31 contains a yellow pigment, a light beam having a wavelength of 500 nm or less can be cut from the emission spectrum of a white light source, so that it is suitable for a clean room of a semiconductor factory using a highly sensitive photosensitive material. A so-called “yellow lamp”, which is suitable for the above, can be obtained as an illumination device that does not expose a highly sensitive photosensitive material.

  The lighting device 1 is provided with a metal locking member 34 for locking the cover unit 30 to the instrument body 10. The locking member 34 has a claw portion 34 a that locks in a long hole (not visible in FIGS. 2, 3, etc. due to the cross-sectional position) formed in the vertical portion 10 e of the instrument body 10. It is fixed with screws. The locking member 34 is formed with a locking portion 34b for locking the V-shaped coil spring 40 on the opposite side of the claw portion 34a.

  The V-shaped coil spring 40 is formed in a V shape by bending a single metal wire, and extends from both ends of the winding portion 41 in which the metal wire is coiled a plurality of times. It consists of a pair of formed arm parts 42a and 42b.

  The pair of arm portions 42a and 42b of the V-shaped coil spring 40 are gripped so that the V shape is closed, and the arm portions 42a and 42b are inserted into the elongated holes of the mounting member 11 fixed to the instrument body 10 in this state, and then the arm When the portions 42 a and 42 b are released, the pair of arm portions 42 a and 42 b of the V-shaped coil spring 40 are held in a state of being locked to the attachment member 11. When the cover unit 30 is lifted upward from this state, the V-shaped coil spring 40 returns to the natural state by the restoring force of the spring. The cover unit 30 with the holding member 22 attached thereto by this restoring force is attached to the instrument body 10. The upward movement of the cover unit 30 is performed until the cover upper portion 32 of the cover unit 30 comes into contact with the lower edge of the vertical portions 10e and 10f of the instrument main body 10, whereby the cover unit 30 is fixed to the instrument main body 10. Attached.

  On the other hand, when the cover unit 30 is pulled downward against the urging force of the V-shaped coil spring 40, the pair of arm portions 42 a and 42 b of the V-shaped coil spring 40 are locked to the mounting member 11. 3 and then pulling out from the elongated hole of the mounting member 11 while grasping the arm portions 42a and 42b so that the V-shape is closed, to the vertical portion 10e of the instrument body 10 as shown in FIG. It pivots from a horizontal position to a vertical position around the provided long hole.

  FIG. 4 schematically shows the path of illumination light when the LED 21 is turned on. The illumination light traveling toward the inclined portions 31a and 31b or the flat portion 31c of the cover lower portion 31 mainly diffuses and transmits the cover lower portion 31 to illuminate the object. Further, since the cover lower part 31 has a little diffuse reflectivity, a part of the illumination light is directed toward the cover upper part 32, where it is diffusely reflected and directed again toward the cover lower part 31. In addition, a part of the illumination light from the LED 21 is also directed in the horizontal direction. However, since the peripheral portions 32d and 32e of the cover upper portion 32 are inclined downward, the light component in the horizontal direction is also diffusely reflected downward. Head toward the bottom of the cover 31. As described above, since the illumination light is repeatedly reflected and diffused except for a part of the light beam transmitted through the space formed between the cover lower part 31 and the cover upper part 32, a light emitting surface that is uniform over the entire surface can be obtained.

  In the illuminating device 1 of the present embodiment, the peripheral parts 32d and 32e at the upper part of the cover unit 30 are inclined toward the lower part of the cover unit 30 so that the horizontal light component emitted from the LED 21 is caused by the cover upper part 32. Since it is possible to diffusely reflect the light directly downward, the illuminance in the light downward direction can be improved as compared with the conventional lighting device. In particular, as shown in detail in part A in FIG. 4, the edge portions 321d and 321e in the vicinity of the opening 32c of the peripheral portions 32d and 32e are curved in the direction toward the mounting substrate 20 side, thereby making the operation more efficient. The light component in the horizontal direction emitted from the LED 21 can be reflected directly downward.

  FIG. 6 is a schematic cross-sectional view of the cover unit 30 of the lighting device 1, and shows a change in shape between the state in which the holding member 22 is removed from the cover unit 30 and the state in which the holding member 22 is attached. As shown in FIG. 6, when the cover unit 30 is not attached to the upper part of the holding member 22 that holds the mounting substrate 20, the inclination of the peripheral portions 32 d and 32 e of the cover upper part 32 causes the holding member 22 to be inclined. It is formed larger than the state attached to the upper part. By forming the cover unit 30 in such a shape, when the holding member 22 is attached to the upper part, the board engaging portions 22c and 22d of the holding member 22 push the peripheral portions 32d and 32e downward. Since this works, the fixed state of the cover unit 30 and the instrument body 10 can be further stabilized.

  As mentioned above, although the illuminating device concerning this invention has been demonstrated based on drawing, this invention is not limited to the said embodiment, A various change implementation is possible.

  For example, in the present embodiment, in the portion where the cover unit is attached to the instrument body, both side surfaces in the longitudinal direction of the cover unit are positioned outward in the width direction from the longitudinal side surfaces of the instrument body on the same side. However, the step is generated on both sides of the side surface in the longitudinal direction of the lighting device. However, the present invention is not limited to this, and the step may be generated on one side surface of the cover unit.

  In addition, there are various variations in the shape of the lighting device, the shape of the fixture body, and the shape of the cover unit. For example, the longitudinal sides of the fixture body and the cover unit do not necessarily have to be tilted, and tilt in stages. It is not disturbed that the side surface is a side surface or a side surface that is arcuate in cross section. Further, the configuration in which a part of the side surface in the longitudinal direction of the cover unit is located inside in the width direction other than the portion where the cover unit is attached to the instrument body is not excluded.

DESCRIPTION OF SYMBOLS 1 Illuminating device 10 Appliance main body 11 Mounting member 20 Mounting board 21 LED
22 Holding member 22a, 22b Fitting groove 22c, 22d Substrate engaging part 30 Cover unit 31 Cover lower part 31a, 31b Inclined part 31c Flat part 32 Cover upper part 32a, 32b Claw part 32c Opening part 32d, 32e Peripheral part 33 Space 34 Engagement Stop member 40 V-shaped coil spring

Claims (5)

An elongated instrument body attached to the ceiling surface;
A light source including a substrate on which the light emitting element is mounted and a holding member that holds the substrate;
With the light source attached to the upper part, a long cover unit that is detachably attached to the lower side of the instrument body, and
In the upper part of the cover unit, an opening is formed so that the light emitting element is exposed toward the inside of the cover unit,
The lighting device characterized in that peripheral portions on both sides in the longitudinal direction of the opening in the upper part of the cover unit are inclined toward the lower part of the cover unit. The cover unit is composed of a lower part of the cover that diffuses / transmits / reflects the illumination light from the light source, and an upper part of the cover that diffusely reflects the illumination light partially diffused / reflected at the lower part of the cover toward the lower part of the cover again. ,
The lower part of the cover and the upper part of the cover are integrally formed so that the lower part of the cover is located at the lower part of the cover unit and the upper part of the cover is located at the upper part of the cover unit. The lighting device described.   The lighting device according to claim 1, wherein an edge portion of the peripheral portion in the vicinity of the opening is curved in a direction toward the substrate side. The holding member includes a pair of substrate engaging portions for holding the substrate;
The lighting device according to claim 1, wherein an edge portion of the peripheral portion near the opening is in contact with the substrate engaging portion.   5. The lighting device according to claim 4, wherein in a state where the cover unit does not attach the light source to an upper portion, an inclination degree of the peripheral portion is larger than that in a state where the light source is attached to the upper portion.

Images