JP3177429U - Lighting device - Google Patents

Abstract

An illumination device capable of increasing illuminance is provided.
An illumination device is formed into a cylindrical body by a substantially semi-cylindrical casing 10 and a substantially semi-cylindrical translucent cover 50 attached to an end of the casing 10 on the opening side. The substrate 30 on which the LED chip 31 is mounted is provided at the bottom of the housing 10 located on the opposite side of the housing 10 from the translucent cover 50. The reflector 40 includes a bottom plate 41 that covers the substrate 30 around the LED chip 31, and left and right side plates 42 and 43 that extend from the left and right ends of the bottom plate 41 in the width direction to the ends on the opening side of the housing 10, respectively. The light emitted from the LED chip 31 can be reflected. When the light emitted from the LED chip 31 is reflected by the reflector 40, the light is collected near the center of the translucent cover 50.
[Selection] Figure 1

Description

  The present invention relates to a straight tube LED (Light Emitting Diode) illumination device.

2. Description of the Related Art Conventionally, straight tube LED lighting devices provided on indoor ceilings and the like are known.
The lighting device described in Patent Document 1 forms a straight tube-shaped cylinder by a substantially semi-cylindrical housing and a substantially semi-cylindrical translucent cover attached to an end of the housing on the opening side. is doing. A substrate on which the LED chip is mounted is provided inside the cylinder so as to close the opening of the substantially semi-cylindrical casing. The light emitted from the LED chip is irradiated from the translucent cover to the outside.

JP2011-154993A

However, in the illumination device of Patent Document 1, a part of the light emitted from the LED chip is irradiated in the width direction of the translucent cover. Therefore, if the illuminance near the center of the translucent cover is reduced by the amount of light irradiated in the width direction of the translucent cover, the living space immediately below the illumination apparatus will be felt dark in the room where the illumination apparatus is provided. .
Also, in order to increase the illuminance near the center of the translucent cover, if the surface of the substrate on which the LED chip is mounted is painted white and the reflection efficiency of the substrate is increased, there is a concern that the manufacturing cost due to the coating process will increase. The
This invention is made | formed in view of the said problem, and aims at providing the illuminating device which can raise illumination intensity.

  The present invention provides a lighting device in which a cylindrical body is formed by a substantially semi-cylindrical housing and a substantially semi-cylindrical translucent cover, and the housing located on the opposite side of the translucent cover from the opening of the housing. An LED chip is mounted on a substrate provided at the bottom of the body. The reflector has a bottom plate that covers a substrate around the LED chip, and left and right side plates that extend from the left and right end portions in the width direction to the left and right end portions in the width direction on the opening side of the housing, respectively, and the LED chip emits light. The reflected light can be reflected.

  Thereby, the light emitted from the LED chip is directly irradiated to the outside from the translucent cover, or is reflected from the translucent cover or the reflector and then irradiated to the outside from the translucent cover. When the light emitted from the LED chip is reflected by the reflector, the light is collected near the center of the translucent cover. Therefore, the illuminating device collects light irradiated in the width direction of the translucent cover near the center of the translucent cover, and increases the illuminance in the height direction of the illuminating device. Therefore, when this illuminating device is attached to the ceiling in the room, the living space directly under the illuminating device can be brightened as compared with the conventional illuminating device.

It is sectional drawing of the illuminating device by one Embodiment of this invention. It is sectional drawing of the II-II line of FIG. It is a top view in the state where the lighting cover was removed in the III direction of FIG. It is an arrow view of the IV direction of FIG. It is explanatory drawing which shows the assembly method of the illuminating device by one Embodiment of this invention.

Embodiments of the present invention will be described below with reference to the drawings.
(One embodiment)
One embodiment of the present invention is shown in FIGS. The illuminating device 1 of this embodiment is a straight tube type LED illuminating device which can be used by attaching to an indoor ceiling or a wall surface.
In the following description, the X direction, the Y direction, and the Z direction in the coordinates described in FIGS. 1 to 5 will be described as the longitudinal direction, the width direction, and the height direction of the lighting device 1, respectively.

The lighting device 1 includes a housing 10, a substrate 30, an LED chip 31, a reflector 40, a translucent cover 50, and the like.
The housing 10 is formed in a substantially semi-cylindrical shape from a metal having high thermal conductivity, such as aluminum, a resin, or ceramic. Note that the substantially semi-cylindrical shape includes not only a half state of the cylinder but also a state extending in the circumferential direction from the half of the cylinder and a state contracted in the circumferential direction from the half of the cylinder.

The housing 10 includes an outer shell 101, claw portions 12 and 13, pedestals 14 and 15, guides 16 and 17, a first protruding strip portion 21, a second protruding strip portion 22, a first stopper 23, and a second stopper 24. is doing.
The outer shell 101 is formed in a substantially semi-cylindrical shape, and has a plurality of grooves 11 extending in the longitudinal direction on the outer surface thereof. As a result, the outer shell 101 increases the surface area outside the diameter and enhances heat dissipation.
The claw portions 12 and 13 protrude inward from the end of the outer shell 101 on the opening side. The translucent cover 50 is locked to the claw portions 12 and 13. In FIG. 1, the opening of the housing 10 is conceptually indicated by a broken line A.

The pedestals 14 and 15 extend radially inward from the outer shell 101 and can be attached with the substrate 30. The pedestals 14 and 15 are provided at the bottom of the housing 10 located on the side opposite to the translucent cover 50.
Guides 16 and 17 are provided on the left and right sides of the bases 14 and 15 in the width direction. A substrate 30 is attached between the guides 16 and 17 and the bases 14 and 15.

  The first ridge portion 21 protrudes radially inward from one end portion on the opening side of the outer shell 101, and the second ridge portion 22 extends inwardly from the other end portion on the opening side of the outer shell 101. Protruding. The 1st protruding item | line part 21 and the 2nd protruding item | line part 22 are located in the bottom part side rather than the nail | claw parts 12 and 13. FIG. Further, a first stopper 23 having an arc shape in cross section is provided on the bottom side of the first ridge portion 21, and a second stopper 24 having an arc shape in cross section is provided on the bottom side of the second ridge portion 22.

  The substrate 30 is formed of a resin substrate such as FR4 or a metal substrate, for example, and is provided between the guides 16 and 17 and the bases 14 and 15. The substrate 30 is inserted between the guides 16 and 17 and the bases 14 and 15 from the longitudinal direction of the housing 10. Alternatively, the substrate 30 may be fixed to the housing 10 by placing the substrate 30 on the pedestals 14 and 15 and then bending the guides 16 and 17 by heat caulking or the like.

The plurality of LED chips 31 are arranged in series in the longitudinal direction of the substrate 30 at equal intervals, and are mounted on the surface of the substrate 30 on the translucent cover side. By using a relatively large LED chip 31, the number of LED chips 31 can be reduced while maintaining the illuminance.
Electronic components 32 such as diodes that can determine the direction of current flowing in the LED chip 31 are mounted on both ends of the substrate 30 in the longitudinal direction.

The reflector 40 is made of, for example, a resin or metal having a high light reflectance such as white, and can reflect the light emitted from the LED chip 31. The reflector 40 includes a bottom plate 41 that covers the substrate 30 around the LED chip 31, and left and right side plates 42 that extend from the left and right end portions of the bottom plate 41 to the left and right end portions in the width direction on the opening side of the housing 10, respectively. 43.
The bottom plate 41 of the reflector 40 is provided with a plurality of holes 44 corresponding to the plurality of LED chips 31. The plate thickness of the reflector 40 and the thickness of the LED chip 31 are substantially the same.
In the reflector 40, one end of the side plate 42 on the translucent cover side is locked to the end surface on the substrate side of the first protrusion 21, and the other end of the side plate 43 on the translucent cover side is second. The protrusion 22 is locked to the end surface on the substrate side. In the reflector 40, the end face on the outer side in the width direction of one side plate 42 abuts on the first stopper 23, and the end face on the outer side in the width direction of the other side plate 43 abuts on the second stopper 24 to prevent it from opening outward. It is peeling off.

  The translucent cover 50 is formed in a substantially semi-cylindrical shape from a translucent or transparent resin or glass. The translucent cover 50 has concave groove portions 51 and 52 having a U-shaped cross section provided corresponding to the claw portions 12 and 13 of the housing 10. The translucent cover 50 is fixed to the housing 10 by fitting the recessed grooves 51 and 52 of the translucent cover 50 into the claw portions 12 and 13 of the housing 10. The translucent cover 50 and the housing 10 form a straight tube.

  The translucent cover 50 extends from one concave groove 51 to the inside in the diameter and covers the end of one side plate 42 of the reflector 40, and extends from the other concave groove 52 to the inside in the diameter to the other side of the reflector 40. And a second holding portion 54 covering the end portion of the side plate 43. The first holding portion 53 prevents one side plate 42 of the reflector 40 from projecting inward in the radial direction from the first ridge portion 21. The second holding portion 54 prevents the other side plate 43 of the reflector 40 from projecting inward in the radial direction from the second protruding strip portion 22.

At the both ends of the cylinder formed by the translucent cover 50 and the housing 10, caps 60 and 61 formed into a bottomed cylinder from resin or the like are attached. The bases 60, 61 are formed between the cylindrical space formed between the first ridge portion 21 and the first stopper 23 of the housing 10, and between the second ridge portion 22 and the second stopper 24. The screws 62 and 63 are fixed in the cylindrical space thus formed.
Terminals 64 and 65 provided on the caps 60 and 61 and the electronic circuit of the substrate 30 are electrically connected by wirings 66 and 67.

Next, a method for assembling the lighting device 1 will be described with reference to FIG.
First, the bottom plate 41 of the reflector 40 is placed on the substrate 30 from the height direction of the housing 10 on which the substrate 30 on which the LED chip 31 or the like is mounted is removed, as indicated by an arrow in FIG. To do.
Next, as shown by arrows (2) and (3) in FIG. 5, the end of one side plate 42 of the reflector 40 is fitted into the end surface of the first ridge 21 on the substrate side, and the other end of the reflector 40 is inserted. The end of the side plate 43 is fitted into the end face of the second ridge 22 on the substrate side.
Subsequently, the concave groove portions 51 and 52 of the translucent cover 50 are fitted into the claw portions 12 and 13 of the housing 10 as indicated by arrows in FIG. At this time, the first holding portion 53 of the translucent cover 50 covers the end portion of the one side plate 42 of the reflector 40, and the second holding portion 54 covers the end portion of the other side plate 43 of the reflector 40.
Finally, the caps 60 and 61 are attached to both ends of the cylinder formed by the translucent cover 50 and the housing 10 to complete the lighting device 1.

In the present embodiment, the following effects are obtained.
(1) In the present embodiment, the LED chip 31 is mounted on the substrate 30 provided at the bottom of the housing 10. In the reflector 40, the bottom plate 41 covers the substrate 30 around the LED chip 31, and the left and right side plates 42 and 43 extend to the left and right ends in the width direction on the opening side of the housing 10. Thereby, the light emitted from the LED chip 31 is directly emitted to the outside from the translucent cover 50, or after being reflected by the translucent cover 50 or the reflector 40, the light is emitted from the translucent cover 50 to the outside. Is done. When the light emitted from the LED chip 31 is reflected by the reflector 40, the light is collected near the center of the translucent cover 50. Therefore, the illuminating device 1 condenses the light irradiated in the width direction of the translucent cover 50 in the vicinity of the center of the translucent cover 50 and increases the illuminance in the height direction of the illuminating device 1. Therefore, when this illuminating device 1 is attached to an indoor ceiling, the living space directly under the illuminating device can be brightened.

(2) In this embodiment, since the conventional coating process can be abolished by attaching the reflector 40 to the housing 10, the manufacturing cost of the lighting device 1 can be reduced compared to the case where the substrate 30 and the inside of the housing 10 are painted white. Can be reduced.
(3) In the present embodiment, since the distance between the plurality of LED chips 31 provided on the substrate 30 and the translucent cover 50 is increased, variation in light emitted by each LED chip 31 can be reduced. Therefore, it is possible to increase the size of each LED chip 31 to maintain the illuminance and reduce the number of LED chips 31. Thereby, the manufacturing cost of the illuminating device 1 can be reduced.

(4) In the present embodiment, the reflector 40 is configured such that the end of the one side plate 42 on the side of the translucent cover is locked to the first ridge portion 21 of the housing 10 and the translucent cover of the other side plate 43. The side end is locked to the second ridge 22 of the housing 10. This makes it possible to easily attach the reflector 40 to the housing 10 without using an adhesive or the like.

(5) In the present embodiment, the translucent cover 50 includes a first holding part 53 that covers one end of the reflector 40 and a second holding part 54 that covers the other end of the reflector 40. The 1st holding | maintenance part 53 and the 2nd holding | maintenance part 54 prevent the side plates 42 and 43 of the reflector 40 from projecting in the radial direction from the 1st protruding item | line part 21 or the 2nd protruding item | line part 22. FIG. For this reason, it is possible to prevent the reflector 40 from being detached from the housing 10 due to vibration during product conveyance or vibration during indoor installation.

(6) In this embodiment, the bases 14 and 15 to which the substrate 30 is attached are provided at the bottom of the housing 10. For this reason, the heat radiation path from the LED chip 31 to the outer shell 101 of the housing 10 via the bases 14 and 15 is shortened. Therefore, since the heat dissipation of the LED chip 31 is improved, the power consumed for the light emission of the LED chip 31 can be reduced and the durability of the LED chip 31 can be increased.

(Other embodiments)
In the above-described embodiment, the straight-tube illumination device has been described. On the other hand, in other embodiments, the lighting device may be round or various shapes.
In the above-described embodiment, the reflector and the casing are assembled by fitting the reflector into the casing from the height direction. On the other hand, in other embodiments, the reflector and the casing may be assembled by inserting the reflector into the casing from the longitudinal direction.
In the above-described embodiment, the reflector and the casing are assembled by fitting the translucent cover into the casing from the height direction. On the other hand, in other embodiments, the translucent cover and the casing may be assembled by inserting the translucent cover into the casing from the longitudinal direction.
The present invention is not limited to the above embodiment, and can be implemented in various forms without departing from the spirit of the invention.

DESCRIPTION OF SYMBOLS 1 ... Illuminating device 10 ... Case 30 ... Board | substrate 31 ... LED chip 40 ... Reflector 41 ... Bottom plate 42, 43 ... Side plate 50 ... Translucent cover

Claims (4)

A substantially semi-cylindrical housing;
A semi-cylindrical translucent cover that is attached to the left and right ends of the opening side of the casing and forms a cylindrical body together with the casing;
A substrate provided at the bottom of the casing located on the opposite side of the translucent cover from the opening of the casing;
An LED chip mounted on the transparent cover side of the substrate;
A bottom plate covering the substrate around the LED chip, and left and right side plates extending from the left and right end portions in the width direction of the bottom plate to the left and right end portions in the width direction on the opening side of the housing, respectively. An illumination device comprising: a reflector capable of reflecting emitted light. The housing is
A substantially semi-cylindrical outer shell,
The lighting device according to claim 1, further comprising: a pedestal that extends in a radially inward direction from the outer shell and to which the substrate can be attached. The casing has a first protruding portion projecting radially inward from one end in the width direction of the outer shell, and a second projecting radially inward from the other end in the width direction of the outer shell. A ridge, and
In the reflector, an end of the one side plate on the translucent cover side is locked to the first ridge, and an end of the other side plate on the translucent cover side is the second ridge. The lighting device according to claim 1, wherein the lighting device is locked to the portion. The translucent cover is
A first holding portion covering an end portion of the one side plate of the reflector on the translucent cover side;
The lighting device according to claim 3, further comprising: a second holding portion that covers an end portion of the other side plate of the reflector on the translucent cover side.

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