JP2013073762A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small lighting device having a wide irradiation range.SOLUTION: The lighting device is provided with a casing B, and an LED 1 built in the casing B, and a cover member 4 which has transmittance for transmitting the light from the LED 1 and is arranged so as to oppose the optical axis of the LED 1. The LED 1 is arranged so that an irradiation face 10 of the LED 1 may be on the same face as an outermost face of the casing B or may be projected to a side outer than the outermost face of the casing B; the cover member 4 has a light diffusion part 4A which is formed with an LED 1 side as a concave part and an irradiation side as a convex part 41A; and the diffusion part 4A is arranged so as to be projected outside from the outermost face of the casing B.

Description

  The present invention relates to a lighting device using a light emitting diode element.

  An illumination device using a light emitting diode element is used, for example, in a street light for crime prevention that irradiates light on a road. A mercury lamp is generally used for such an illuminating device, but recently, an illuminating device using a light emitting diode element (hereinafter referred to as “LED”) as disclosed in Patent Document 1 below is also available. It is becoming used.

  The illuminating device described in Patent Document 1 secures a wide irradiation range by attaching a plurality of light emitters each having a plurality of LEDs built in a hollow tube to a holding section having a circular arc cross section along the arc. I am doing so.

JP 2009-176567 A

  However, the prior art of Patent Document 1 requires a considerable number of light emitters incorporating a plurality of LEDs, and further requires an arc-shaped holding section to which the light emitters are attached. There was a problem that. In addition, there is a problem that the manufacturing cost of the lighting device is high and the lighting device becomes expensive.

  This invention makes it an example of a subject to cope with such a problem. That is, the lighting device having a wide irradiation range can be reduced in size, the manufacturing cost of the lighting device can be reduced, the installation and maintenance of the lighting device can be facilitated by downsizing, and the lighting device can be reduced in cost by reducing the manufacturing cost. It is an object of the present invention to be able to do so.

  In order to achieve such an object, an illumination device according to the present invention has at least the following configuration.

  A casing, a light-emitting diode element incorporated in the casing, a cover member having transparency to transmit light of the light-emitting diode element, and disposed on the casing so as to face the optical axis of the light-emitting diode element; The light emitting diode element is arranged such that the irradiation surface of the light emitting diode element also protrudes to the same surface as the outermost surface of the casing or the outermost surface of the casing, and the cover member includes the light emitting diode element. It has a light diffusing portion formed with a concave portion on the side and a convex portion on the irradiation side, and the diffusing portion is arranged so as to protrude outward from the outermost surface of the casing.

  The concave and convex portions of the diffusion portion are preferably curved surfaces. Moreover, it is preferable that the curved surface of this recessed part and a convex part is a spherical surface, or the circular arc surface which draws an arc in one direction.

  By having such characteristics, the present invention has the following effects. That is, by projecting the diffusing portion outward from the outermost surface of the casing, it is possible to reduce the size of the lighting device having a wide irradiation range and reduce the manufacturing cost of the lighting device. The downsizing can facilitate installation and maintenance of the lighting device, and the manufacturing cost can be reduced to reduce the lighting device.

The perspective view of the illuminating device which concerns on embodiment of this invention. The perspective view of the illuminating device of a state which opened the cover body. (3)-(3) sectional view taken on the line of FIG. (4)-(4) sectional view taken on the line of FIG. Sectional drawing which shows the other form of a cover member. FIG. 6 is a sectional view taken along line (6)-(6) in FIG. 5.

  The lighting device described below is installed on a utility pole, a wall surface of a building, and the like, and is used for crime prevention that irradiates light along the longitudinal direction of the road described above (crime prevention light). A plurality of such security lights are installed at regular intervals along the longitudinal direction of the road so as to satisfy the illuminance standard set by the Japan Security Equipment Association.

  There are illuminance standards for security lights called Class A and Class B. Class A is an illuminance that can identify the outline of the face of a pedestrian 4 meters ahead, with a horizontal illuminance (average value) of 5 lux or more and a vertical illuminance (minimum value) of 1 lux or more. Class B is an illuminance in which the horizontal plane illuminance (average value) is 3 lux or more, the vertical plane illuminance (minimum value) is 0.5 lux or more, and the behavior and posture of a pedestrian 4 meters ahead can be understood.

  Whether to use security light of Class A or Class B can be arbitrarily determined according to the road conditions installed, the importance of security, the number of pedestrians and traffic, the brightness of the surrounding environment, cost, etc. .

  The installation interval of the security light may be an interval that can ensure the illuminance determined in the above-described class A or class B, and at least 6 m or more for class A and 10 m or more for class B.

  Hereinafter, an illuminating device according to an embodiment of the present invention will be described with reference to the drawings. 1 to 4 are configuration diagrams of the illumination device A. FIG. This illuminating device A is a crime prevention light used for crime prevention which irradiates light on a road.

  The illumination device A includes a light emitting unit 2 in which a plurality of light emitting diode elements (hereinafter referred to as “LEDs”) 1 are arranged as a light source, a power supply unit 3 that forms a power source for driving the light emitting unit 2, a light emitting unit 2 and light. The light emitting unit 2 and the power supply unit 3 are accommodated in the casing B. The cover member 4 is disposed so as to face each other in the axial direction.

  The casing B includes a housing B1 that houses the light emitting unit 2 and the power supply unit 3, and a lid B2 to which the cover member 4 is attached and opens and closes the housing B1.

  The housing B1 is provided with an attachment frame B3 for attaching the lighting device A to a utility pole or the like. Further, a large number of heat radiating plates B4 are formed on the outer wall of the housing B1, and heat in the casing B is radiated through the heat radiating plates B4.

  The lid B2 is pivotally supported so that one side of the lid B2 can rotate to one side of the opening B10 so as to open and close the opening B10 of the container B1.

  On the other side of the opening B10, a locking portion B11 for holding and releasing the closed state of the lid B2 is provided, and when the locking portion B11 engages with the lid B2, the lid B2 is engaged. The closed state is maintained, and the engagement state of the locking portion B11 is released, whereby the lid body B2 rotates and the opening portion B10 is opened.

  When the engagement is released, the lid B2 is rotated by its own weight to open the opening B10. A through-hole B20 that is closed by the cover member 4 is opened in the lid B2.

  The attachment frame B3 is formed in a U shape in FIG. 1, and both end portions B30 and B30 are pivotally supported so as to be rotatable and fixable with respect to the container B1. With the mounting frame B3 fixed to a utility pole (not shown) or a wall surface (not shown), the container B1 is rotated to adjust the installation angle, and the container B1 is fixed at a predetermined angle. Yes.

  The light emitting unit 2 is configured by embedding and fixing a plurality of LEDs 1 in the substrate 20 and connecting them in series via printed wiring (not shown) on the substrate 20, and supplying electricity to the LEDs 1 by connecting to the power supply unit 3. It is supposed to be. The light emitting unit 2 is provided so that the irradiation surface 10 of the LED 1 protrudes from the through hole B20 to the outside of the casing B, and the light from the LED 1 is not blocked by the lid B2.

  The position of the irradiation surface 10 of the LED 1 is not limited to the position where the irradiation surface 10 protrudes from the through-hole B20 to the outside of the lid B2 (outside of the casing B), and the position of the irradiation surface 10 is the position of the lid B2. You may make it become the same surface as the outermost surface (outermost surface of the casing B).

  The board | substrate 20 is arrange | positioned so that the irradiation surface 10 of LED1 may face the ground direction (downward in FIG.1 and FIG.2) in the center part of the reflecting plate 4. FIG.

  The light emitting unit 2 is covered with a reflector 21 except for the LED 1. The reflection plate 21 has a passage opening 21 </ b> A through which light from the LED 1 passes at a portion facing the LED 1, and the light from the LED 1 is passed through the passage opening 21 </ b> A toward the cover member 4. . Further, the reflection plate 21 reflects the light reflected by the cover member 4 so as to be directed to the cover member 4.

  The power supply unit 3 is provided with a power cable 31 having an outlet plug 30 connected to an external power supply (not shown), and the power supply unit 3 supplies electricity from the external power supply to the light emitting unit 2. It is like that.

  The cover member 4 is formed by integrally forming a diffusing portion 4A for diffusing the light of the LED 1 and a flange 4B surrounding the diffusing portion 5A, using transparent or transmissive glass or hard synthetic resin.

  The diffusing portion 4A includes a spherical concave portion 40A on the LED1 side (inner side) and a spherical convex portion 41A concentric with the concave portion 40A on the irradiation side (outer side). The diffusing portion 4A is configured such that the convex portion 41A protrudes outward from the through hole B20 with the convex portion 41A facing the irradiation side.

  That is, since the diffusing portion 4A is arranged so that the spherical convex portion 41A protrudes from the through hole B20, the light from the LED 1 is diffused outside the lid B2, so that the range of 360 ° in the plane direction is obtained. And it can irradiate a wide range. Moreover, since LED1 is protruded to the outer side of lid B2 from through-hole B20, and the light from LED1 is prevented from being obstructed by lid B2, the light of LED1 can be efficiently irradiated to a wide range.

  The flange 4B is similar to the inner periphery of the through hole B20 and has an outer periphery larger than the inner periphery, and the cover member 4 is covered by attaching the flange 5B to the peripheral surface of the passage B20. It is designed to be attached to the body B2. The mounting structure of the flange 5B is preferably a structure that is detachable by screwing (not shown) or the like.

  According to the illuminating device A provided with such a cover member 4, the diffusing portion 4A having the spherical convex portion 41A diffuses the light from the LED 1 outside the lid B2, and the LED 1 is attached to the outermost portion of the lid B2. By projecting outward from the outer surface, the light from the LED 1 is prevented from being obstructed by the lid B2, so that the light from the LED 1 can be diffused efficiently, thereby broadening the light from the LED 1. The range can be irradiated.

  Further, since the light from the LED 1 can be efficiently diffused and the light from the LED 1 can be irradiated over a wide range, it is not necessary to add the LED 1 or the light emitting unit 2.

  Moreover, since it is not necessary to add the LED 1 or the light emitting unit 2, it is possible to reduce the size of the illumination device A having a wide irradiation range and reduce the manufacturing cost of the illumination device A. By reducing the size of the illumination device A, the installation and maintenance of the illumination device A can be facilitated, and by reducing the manufacturing cost of the illumination device A, the illumination device A can be made inexpensive.

  Furthermore, since it is possible to irradiate a wide area in a 360 ° range, for example, in a place where the irradiation direction is in a 360 ° range, such as a large place such as a park, for example. In addition to being able to irradiate light, it can also be used in places such as roads where the irradiation range needs to be widened in one direction.

  5 and 6 are configuration diagrams of other forms of the cover member 4 '. The cover member 4 ′ is formed by forming the diffusing portion 4 </ b> C as an arc surface in which the curved surfaces of the concave portion 40 </ b> C and the convex portion 41 </ b> C form an arc in one direction. According to the cover member 4 ′ having such a diffusing portion 4C, the light from the LED 1 can be diffused along one direction, and thus, for example, it is necessary to widen the irradiation range in one direction such as a road. Light can be efficiently irradiated at a certain place.

  It should be noted that the present invention is not limited to the illustrated embodiments, and can be implemented with configurations within a range that does not deviate from the contents described in the respective claims.

A: Lighting device B: Casing 1: LED (light emitting diode element)
4: Cover member 4 ': Cover member 10: Irradiation surface 4A: Diffusion part 4B: Diffusion part 40A: Concave part 40C: Concave part 41A: Convex part 41C: Convex part

Claims (4)

  A casing, a light-emitting diode element incorporated in the casing, a cover member having transparency to transmit light of the light-emitting diode element, and disposed on the casing so as to face the optical axis of the light-emitting diode element; The light emitting diode element is disposed such that an irradiation surface of the light emitting diode element protrudes to the same surface as the outermost surface of the casing or the outermost surface of the casing, and the cover member includes the light emitting diode element An illuminating device comprising: a light diffusing portion formed with a concave portion on the side and a convex portion on the irradiation side, and the diffusing portion protruding outward from the outermost surface of the casing.   The lighting device according to claim 1, wherein the concave portion and the convex portion are curved surfaces.   The lighting device according to claim 2, wherein the curved surface of the concave portion and the convex portion is a spherical surface.   The lighting device according to claim 2, wherein the curved surface of the concave portion and the convex portion is an arc surface that draws an arc in one direction.

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