JP2007035381A - Illumination device and illumination apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an illumination device and an illumination apparatus, which change a direction of light irradiated from the illumination device without using a hinge structure to change the direction of the illumination device itself. <P>SOLUTION: The illumination device 1 is provided with: a lens 5 arranged on upper part of an LED 2 refracting the light emitted from the LED2 and irradiating it in a definite direction; and holding plates 7 for holding the lens 5 arranged at left side and right side of the lens 5, mounted on a case 4. The lens 5 has stick-shaped protruded parts 8 at left and right side faces located at neighborhood of upper part, facing the holding plate 7. The holding plate 7 has a groove part 9 formed at a prescribed position at one end of the holding plate mounted on the case 4 in order to insert the protruded part 8, as a center. The direction of the lens can be changed by moving the protruded part 8 penetrated through the groove part 9. The irradiation direction of the light emitted from the LED 2 is easily changed thereby without changing the direction of the illumination device 1 itself. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention particularly relates to an illumination device and an illumination device using an LED as a light source.

  In a conventional illumination device using an LED as a light source, in order to irradiate light emitted radially from the LED in a certain direction, for example, a so-called hybrid lens having a convex surface on the bottom surface of a concave portion where light enters is near the LED. Installed on. As a result, the light emitted from the LED is refracted by the hybrid lens, so that it can be irradiated in a certain direction. However, in such an illuminating device, the light irradiation direction cannot be changed, and in order to change the light irradiation direction, it is necessary to change the direction of the illuminating device itself. In view of this, the lighting apparatus has been provided with a hinge mechanism in a housing attached to a wall, ceiling, or the like, so that the direction of the lighting device itself has been changed. However, such a lighting device requires a hinge mechanism, and it is necessary to install wiring in consideration of the effect of changing the orientation of the lighting device itself mounted on a wall or ceiling. Is complicated and difficult to install.

  Further, as a configuration for changing the range illuminated by the light of the lighting device without changing the direction of the lighting device itself, for example, as shown in Patent Document 1, illumination including a prism lens made of a convex surface and a prism lens made of a concave surface The device is known. Since the prism lens having a convex surface and the prism lens having a concave surface are attached to the illumination device so as to be movable, the prism lenses can be exchanged by moving each prism lens. Thus, when a prism lens made of a convex surface is used, the illumination device can irradiate a wide range, and when a prism lens made of a concave surface is used, the illumination device can irradiate a narrow range.

  Further, a part of the light emitted from the LED did not enter the hybrid lens because it leaked from between the LED and the hybrid lens provided in the vicinity of the LED. Thereby, the light quantity irradiated from an illuminating device may not be enough. Thus, for example, as shown in Patent Document 2, a configuration is known in which a reflection frame is formed around an LED so that light leaking from between the LED and the hybrid lens is reflected and incident on the hybrid lens. Yes.

  However, since the technique disclosed in Patent Document 1 requires a plurality of prism lenses, an increase in manufacturing cost due to an increase in the number of parts and a complicated structure has been a problem. Further, when a narrow area is irradiated, the light is collected so that it can be brightly illuminated. However, when a wide area is irradiated, there is a problem that sufficient light intensity cannot be obtained because the light is dispersed.

Further, in the technique disclosed in Patent Document 2, since the LED, the hybrid lens, and the reflector are integrally fixed, in order to change the irradiation direction of the light from the illumination device, the conventional illumination is used. Like the device, the lighting device itself had to change direction. For this reason, the structure of the illuminating device is complicated, and it is difficult to mount the lighting device, resulting in an increase in manufacturing cost and a deterioration in mounting work.
JP 2004-199891 A Japanese Patent Laid-Open No. 06-103802

  The present invention has been made to solve the above-described problems of the conventional example, and easily changes the direction of light emitted from the lighting device without using a hinge mechanism for changing the direction of the lighting device itself. It is an object of the present invention to provide a lighting device and a lighting device that can be easily mounted while simplifying the structure of the lighting device to reduce the manufacturing cost.

  In order to achieve the above object, the invention of claim 1 includes an LED as a light source, a housing including a mounting plate to which the LED is attached, and an optical component that is provided on the LED and controls the traveling direction of light emitted from the LED. The housing includes a holding plate that is provided to face the left and right side surfaces of the optical component and holds the optical component, and the optical component has protrusions on the left and right side surfaces that oppose the holding plate in the vicinity of the optical component. The holding plate is formed with an arc-shaped groove centered at a height position substantially corresponding to the light emitting portion of the LED, and the optical component is inserted into the groove and guided by the groove. It is designed to be rotatable.

  According to a second aspect of the present invention, there is provided a telescopic reflecting member or a light shielding member for preventing light emitted from the LED from leaking between the LED and the optical component, and the reflecting member or the light shielding member is provided around the LED. In this state, one end is attached to the mounting plate and the other end is attached to the lower part of the optical component.

  Further, the invention of claim 3 is provided with the illumination device according to claim 1 or claim 2.

  According to the first aspect of the present invention, the optical component is guided by the groove portion by inserting the protrusion portions provided on the left and right side surfaces facing the holding plate in the vicinity of the upper portion thereof into the groove portion formed on the holding plate. It can be freely rotated. By rotating the optical component, the lighting device can change the light irradiation direction without changing the direction of the lighting device itself, and thus a hinge mechanism for changing the direction of the lighting device itself is not necessary. Thereby, since the structure of the lighting device is simplified, the manufacturing cost is suppressed and the mounting operation of the lighting device is facilitated.

  According to the second aspect of the present invention, the illumination device includes the reflective member or the light shielding member that can expand and contract between the LED and the optical component in a state in which the periphery of the LED is covered. And leaking from between the optical components. Thereby, the illuminating device can prevent the light quantity of an illuminating device from decreasing by making the light which leaks from between LED and an optical component enter into an optical component by a reflection member or a light shielding member.

  According to the invention of claim 3, the same effect as described above can be obtained, and furthermore, by providing a plurality of illumination devices, the lenses of the individual illumination devices can be rotated to irradiate each illumination device. The direction of the emitted light can be changed, and the color of each light can be changed.

  Hereinafter, a lighting apparatus according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a configuration of a lighting apparatus according to the first embodiment of the present invention. The lighting device 1 includes an LED 2 that emits light as a light source, an attachment plate 3 to which the LED 2 is attached, a housing 4 on which the attachment plate 3 is installed, and a light that is provided above the LED 2 and refracts the light emitted by the LED 2 in a certain direction. And an optical component 5 (hereinafter referred to as a lens 5) that irradiates the lens 5 and a holding plate 7 that is provided facing the left and right side surfaces of the lens 5 and holds the lens 5. The LED 2 includes an LED lens 6 on the upper surface. The lens 5 is provided with protrusions 8 on the left and right sides facing the holding plate 7 in the vicinity of the upper portion thereof. The holding plate 7 is attached to the housing 4 and has an arcuate groove 9 centered at a height position substantially corresponding to the light emitting portion of the LED 2. The protrusion 8 is inserted into the groove 9. Here, the lens 5 is, for example, a hybrid lens.

  The light emitted radially from the LED 2 enters the lens 5. The lens 5 refracts incident light and irradiates it in a direction perpendicular to the upper surface of the lens 5. Thereby, the illuminating device 1 can irradiate light in a fixed direction. Further, the lens 5 is rotated and changed in direction by moving the protrusion 8 that is penetrated through the groove 9. Thereby, the illuminating device 1 can change the irradiation direction of light, without changing the direction of the illuminating device 1 itself, by changing the direction of the lens 5. In addition, it is desirable to attach a rubber member to the protrusion 8 or the groove 9 so that the protrusion 8 is prevented from rotating.

  The light emitted from the light source is collected by a lens, and the irradiation direction can be changed by moving the lens. The light distribution of this light source is strongest in the vicinity of the center of the light emission direction, and from there, it has a light distribution curve in which a certain angle range is large and the luminous intensity does not decrease. The trajectory for moving the lens is rotated at an arbitrary radius about the approximate center of the light emitting portion of the lens.

  2A and 2B show a state in which the direction of the lens 5 of the illumination device 1 can be changed. FIGS. 2A and 2B both show a state in which the illumination device 1 is viewed from the direction of the holding plate 7. The lens 5 rotates in an arc around the center of the arc shape along the arc-shaped groove portion 9 centering on the height position of the light emitting portion of the LED 2. Thereby, even if the lens 5 rotates, since the lower part of the lens 5 is located in the vicinity of the upper part of the LED 2, the light emitted from the LED 2 can efficiently enter the lens 5. FIG. 2A shows a state in which the illumination device 1 emits light upward, and FIG. 2B shows a state in which the illumination device 1 emits light obliquely upward. In FIG. 2A, the upper surface of the lens 5 is in a state parallel to the mounting plate 3 and the housing 4 because the protruding portion 8 is disposed at the center of the groove portion 9. For this reason, the light emitted radially from the LED 2 is irradiated in a direction perpendicular to the upper surface of the lens 5 (arrow A).

  In FIG. 2B, the upper surface of the lens 5 is inclined to the left side because the protrusion 8 is disposed on the left side of the groove 9. Thereby, since the upper surface of the lens 5 faces obliquely upward, the light emitted radially from the LED 2 is irradiated in a direction perpendicular to the upper surface of the lens 5 (arrow B). Thus, since the direction of the lens 5 is changed by moving the projection 8 in the arc direction of the groove 9 while the projection 8 is guided by the groove 9 without changing the direction of the illumination 1 itself. The light irradiation direction can be easily changed.

  FIGS. 3A and 3B show a first modification of the illumination device 1. FIGS. 3A and 3B both show a state in which the illumination device 1 includes a reflective member 11 that can be expanded and contracted. The illuminating device 1 is configured to have a gap 10 between the LED 2 and the lens 5. Therefore, the illumination device 1 includes a reflecting member 11 in order to prevent a part of light emitted from the LED 2 from leaking from the gap 10 between the LED 2 and the lens 5. The reflecting member 11 is attached to the lower portion of the lens 5 at one end side and attached to the mounting plate 3 at the other end side so as to cover the periphery of the LED 2. In addition, the reflecting member 11 is configured to be able to expand and contract in order to maintain the state in which the LED 2 is covered even when the lens 5 is rotated. Therefore, the shape of the reflecting member 11 is formed to be a bellows shape so that the reflecting member 11 can expand and contract. Further, the reflecting member 11 is formed of a material having a good light reflection efficiency such as a white sheet or an aluminum sheet having a good reflection efficiency. Here, a light shielding member may be used instead of the reflecting member 11.

FIG. 3A shows a state in which the lighting device 1 emits light upward, and FIG. 3B shows a state in which the lighting device 1 emits light obliquely upward. In FIG. 3A, the upper surface of the lens 5 is in a state parallel to the mounting plate 3 and the housing 4 because the protrusion 8 is disposed at the center of the groove 9. At this time, the gap 10 between the LED 2 and the lens 5 is substantially uniform at any position around the LED 2. The light leaking from the gap 10 between the LED 2 and the lens 5 is
Reflected by the reflecting member 11 to the lens 5. Thereby, since the reflected light injects into the lens 5, the illuminating device 1 can prevent that the light quantity to irradiate reduces.

  In FIG. 3B, the upper surface of the lens 5 is inclined to the left side because the protrusion 8 is disposed on the left side of the groove 9. When the lens 5 is tilted to the left, the gap 10a between the left side of the LED 2 and the lower part of the lens 5 is narrowed, and the gap 10b between the right side of the LED 2 and the lower part of the lens 5 is widened. At this time, since the reflecting member 11 on the gap 10a side is contracted and the reflecting member 11 on the gap 10b side is extended, the reflecting member 11 covers the periphery of the LED 2 even when the lens 5 is tilted. The light leakage from the gap 10 can be prevented.

  FIG. 4 shows a second modification of the illumination device 1. The lighting device 1 includes a spring member 12 that is attached to the housing 4 on the outside of the holding plate 9 and abuts against the protrusion 8. The shape of the upper part of the spring member 12 is formed so as to have an arc shape with the height position substantially corresponding to the LED 2 as the center, like the groove portion 9. Further, the upper portion of the spring member 12 is formed to be at the same height position as the groove portion 9. The upper back surface of the spring member 12 abuts on the protrusion 8 inserted into the groove 9. The spring member 12 urges the protrusion 8 toward the center of the arc shape at the top of the spring member 12. As a result, the lens 5 is difficult to rotate because the projection 8 is biased by the groove 9, and thus the position of the lens 5 that is rotated cannot be changed by vibration or gravity.

  FIG. 5 shows a configuration of a lighting device according to the second embodiment of the present invention. The lighting device 13 includes three lighting devices 1. Here, the mounting plate 3, the housing 4 and the holding plate 7 of each lighting device 1 are connected and integrated. Since the mounting plate 3, the housing 4 and the holding plate 7 are integrated, the number of parts can be reduced as compared with the case where the three lighting devices 1 are individually mounted. Work becomes easy and design property improves. In addition, the lighting device 13 including the plurality of lighting devices 1 is compact because the mounting plate 3, the housing 4, and the holding plate 7 are integrated, but the lens 5 of each lighting device 1 is rotated. As a result, it is possible to change the direction (arrow C) of the light emitted from each lighting device 1, and also to change the color of each light. Furthermore, the heat generated by the LED 2 is efficiently radiated because the contact area between the mounting plate 3 and the housing 4 is increased and the heat is easily conducted to the mounting plate 3 and the housing 4.

  FIG. 6 shows a configuration of a lighting device according to the third embodiment of the present invention. The lighting device 13 includes three lighting devices 1 each having four LEDs 2, lenses 5, and mounting plates 3 arranged in parallel. The illumination device 1 includes a transparent lens mounting plate 14 into which the lens 5 is fitted. The lens mounting plate 14 is provided with projections 8 at both ends, and the projections 8 are inserted into the grooves 9 provided in the holding plate 7. By rotating the lens mounting plate 14 in which the lens 5 is fitted, the direction of light irradiated in parallel from the lighting device 1 can be changed. By rotating the lens mounting plate 14 of each lighting device 1 in different directions, the light of each lighting device 1 can be irradiated in different directions. Further, by rotating the lens mounting plate 14 of each lighting device 1 in the same direction, it is possible to irradiate the same direction with a plurality of lighting devices 1, compared to when irradiating with one lighting device 1. Can be irradiated more brightly.

  In addition, this invention is not restricted to the structure of the said various embodiment, A various deformation | transformation is possible in the range which does not change the meaning of invention. For example, instead of the spring member 12 for making it difficult to rotate the lens 5 in FIG. 4, the protrusion 8 may be knurled. 5 to 6, the number of lighting devices 1 included in the lighting device 13 is not limited to three, and a configuration including more lighting devices 1 may be used.

The perspective view which shows the structure of the illuminating device which concerns on the 1st Embodiment of this invention. (A), (b) is explanatory drawing which shows the state from which the direction of the lens 5 of the illuminating device 1 can be changed. (A), (b) is explanatory drawing which shows the 1st modification of the illuminating device 1. FIG. The perspective view which shows the 2nd modification of the illuminating device 1. FIG. Explanatory drawing which shows the structure of the illuminating device which concerns on the 2nd Embodiment of this invention. The perspective view which shows the structure of the illuminating device which concerns on the 3rd Embodiment of this invention.

Explanation of symbols

1 Lighting device 2 LED
3 Mounting plate 4 Housing 5 Optical component (lens)
7 Holding plate 8 Projection 9 Groove 13 Lighting equipment

Claims (3)

In an illuminating device comprising: an LED as a light source; a housing including a mounting plate to which the LED is attached; and an optical component that is provided on the LED and controls a traveling direction of light emitted from the LED.
The housing is provided opposite to the left and right side surfaces of the optical component, and includes a holding plate that holds the optical component,
The optical component is provided with protrusions on the left and right sides facing the holding plate in the vicinity of the upper part,
The holding plate is formed with an arc-shaped groove centered at a height position substantially corresponding to the light emitting portion of the LED,
The optical device is characterized in that the projection is inserted into the groove and guided by the groove so as to be rotatable. A light-reflective member or a light-shielding member that is extendable to prevent light emitted from the LED from leaking between the LED and the optical component;
2. The illumination device according to claim 1, wherein the reflecting member or the light-shielding member is attached to the mounting plate and has the other end attached to a lower portion of the optical component in a state of covering the periphery of the LED. .   A lighting apparatus comprising the lighting device according to claim 1.

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