JP3185505U - LED lighting equipment - Google Patents

Abstract

Provided is an LED lighting apparatus in which an LED light source is not damaged or broken even when distortion occurs due to a difference in temperature difference and thermal expansion coefficient.
A light distribution lens is mounted close to a light irradiation direction of an LED light source fixed to a mounting substrate. When the movement of the light distribution lens 7 is restricted by the holder plate 8, a clearance is provided between the light distribution lens 7 and the holder plate 8 so that the light distribution lens 7 can be moved in the light irradiation direction. The light distribution lens 7 is individually arranged for a large number of LED light sources 6. Even if distortion caused by heat occurs, the distortion can be absorbed within the clearance range, so that the LED light source can be prevented from being damaged.
[Selection] Figure 3

Description

  The present invention relates to a large-capacity LED lighting apparatus in which a large number (tens to hundreds) of LED elements serving as light sources are arranged.

  In recent years, environmental awareness has been raised, and particularly in the electric power field, LED (light emitting diode) light sources having characteristics such as low power consumption and long life are used in place of conventional incandescent bulbs and fluorescent lamps. The LED light source has been improved in brightness, and lighting devices for various applications have been proposed.

  This LED light source is highly directional and has a characteristic of irradiating strong light forward. Therefore, it is indispensable to install an appropriate light distribution means such as a reflector, a lens or a diffusion plate according to the intended use. Yes. Among them, a lighting fixture that uses a lens means to perform light distribution is disclosed as a conventional example. (See Patent Document 1)

  In the embodiment of the conventional invention (see FIG. 4), a large number of LED elements 101 are arranged on the mounting substrate 100, and the lenses 102 are individually associated with their light irradiation directions. These lenses 102 are integrally molded together with the holding plate 103. In addition, a regulating plate 105 abuts on the lens end close to the LED element 101 placement portion to hold the lens 102 in a fixed position.

JP 2012-99256 A

  The above-described conventional lighting fixture is a so-called medium-capacity floodlight in which LED elements are arranged in units of at most several tens, and the total heat generation amount is correspondingly small. Therefore, the design burden in performing heat dissipation to the outside is light, and there is no problem caused by heat.

  By the way, recently, in a wide field such as a golf driving range, an extremely large capacity projector is required. In this device, LED elements are aggregated and arranged in units of several hundreds in a single housing, and a total luminous flux value exceeding 100,000 lumens is required. In this large-capacity lighting fixture, the amount of heat generation increases as the amount of light irradiation increases, and strict heat dissipation measures are taken, but still a thermal problem to be solved arises.

  That is, when the configuration of the conventional example is applied as it is, the mounting board 100 (made of aluminum or copper), the holding plate 103 (made of polycarbonate) that holds the lens 102, and the regulating plate 105 that regulates the end 104 of the lens 102 ( (Made of polycarbonate) warped due to temperature difference and difference in thermal expansion between the three components, causing distortion, causing a positional deviation within the delicate clearance between the inner edge of the LED element 101 and the lens 102, and as a result, the LED element There was a problem of incurring damage or breakage.

  The present invention has been made paying attention to the above-mentioned problems of the prior art, and is intended to provide an LED lighting apparatus that solves the adverse effects of heat with a simple structure.

In order to solve the above-mentioned problems, an LED lighting apparatus according to the present invention is mounted with a light distribution lens corresponding to a light irradiation direction in an LED light source fixed to a mounting substrate, and the light distribution lens is attached to a holder plate. The first feature is that a clearance is provided between the light distribution lens and the holder plate so that the light distribution lens can be moved in the light irradiation direction.

Moreover, the LED lighting fixture which concerns on this invention has the 2nd characteristic that each light distribution lens was separately provided with respect to the LED light source in the above.

  According to the problem solving means configured as described above, even if distortion is caused due to a temperature difference between the mounting substrate and the holder plate or a difference in thermal expansion coefficient, escape can be caused within the allowable clearance range. . For this reason, the outstanding effect that problems, such as damage of an LED element and a failure | damage, can be eliminated is exhibited.

It is a front view which shows one Example of the LED lighting fixture which concerns on this invention. Similarly, it is a vertical side view. It is a vertical side view which shows the structure of the principal part. It is explanatory drawing which shows the structure of the conventional lighting fixture.

The purpose of eliminating the harmful effects of heat generation and ensuring the reliability of LED lighting fixtures was reasonably realized with the minimum number of parts.

In FIG. 1, reference numeral 1 denotes a rectangular case 2, a stand 3 provided on both sides of the case 1, and rotation adjustment means 3 for adjusting the inclination of the case 1 with respect to the stand 2.

A mounting plate 4 made of a large plate made of aluminum alloy is disposed in the case 1 as shown in FIG. Then, a mounting board 5 made of an aluminum plate is attached to the mounting plate 4 through a heat dissipation sheet as shown in FIG. As shown in FIG. 1, the mounting substrate 5 is divided into five parts and arranged on the entire surface of the mounting plate 4.

6 is a large number (in the embodiment, 90 × 5 = 450) LED light sources (LED elements) arranged in a matrix on the mounting substrate 5 7 is the light irradiation direction of the LED light source 6 (left side in the figure). The light distribution lens mounted corresponding to the light distribution lens 7 is manufactured by injection molding of polycarbonate resin.

As shown in FIG. 3, the light distribution lens 7 has a substantially cannonball-shaped body 7 a and a pair of support legs 7 b extending left and right, and the support legs 7 b are in contact with the surface of the mounting substrate 5. 7 c is a housing space for the LED light source 6, 7 d is a light irradiation surface of the light distribution lens 7, and 7 e is a circumferential step provided on the light irradiation surface 7 d side.

  8 is a flat holder plate disposed laterally at an appropriate distance from the mounting substrate 5 described above. The holder plate 8 is made of a transparent polycarbonate resin and has a number of stepped round holes 9 on the entire surface. To drill. The stepped circular hole 9 corresponds to each of the light distribution lenses 7 described above and accommodates the circumferential step portion 7 e of the light distribution lens 7.

Here, the circumferential step portion 7e is attached to the stepped circular hole 9 with an appropriate clearance (gap), and this clearance corresponds to the optical axis direction of the LED light source (left and right direction in FIG. 3) and Both directions are orthogonal to each other, and relative movement with the light distribution lens 7 in these directions is allowed.

Reference numeral 11 denotes a spacer interposed between the mounting substrate 5 and the holder plate 8. Reference numeral 12 denotes a mounting screw 13 for fastening the holder plate 8 to the mounting plate 4. The mounting screw 13 is disposed on the entire surface of the case 1 on the front side in the light irradiation direction. It is a cover plate made of tempered glass.

  In the above embodiment, the present invention is applied to a lighting fixture in which a large number of LED light sources are arranged in a matrix, but the same applies to a large lighting fixture in which a large number of LED light sources are arranged radially. Of course you can.

DESCRIPTION OF SYMBOLS 1 Case 4 Mounting board 5 Mounting board 6 LED light source 7 Light distribution lens 7a Body 7c Housing space 7e Circumferential step part 8 Holder plate 9 Stepped round hole 13 Cover board

Claims (2)

In the one in which the light distribution lens is mounted in the light irradiation direction in the LED light source provided fixed to the mounting substrate, and this light distribution lens is held by the holder plate,
An LED lighting apparatus, wherein a clearance is provided between the light distribution lens and the holder plate so that the light distribution lens can be moved in the light irradiation direction. 2. The LED illumination device according to claim 1, wherein each light distribution lens is provided separately from the LED light source.