JP2020107460A - Lighting device - Google Patents

Abstract

To provide a lighting device which can be easily manufactured while improving airtightness between a cover part and a housing part.SOLUTION: A lighting device according to the invention includes: a light emission part having a semiconductor light-emitting element; a housing part which houses the light emission part; and a cover part which covers the light emission part. The cover part has: a cover under part which contacts with the housing part; and a cover body part. The cover under part is made of a material which is softer than the cover body part, serves as a contact point between the housing part and the cover part, and is disposed so as to fill a gap therebetween.SELECTED DRAWING: Figure 3

Description

The present invention relates to a lighting device which is excellent in insect proofing and waterproofing and has excellent productivity.

2. Description of the Related Art As a conventional lighting device used for a downlight, a lighting device that fills a gap between a cover and an outer case by using a silicone rubber packing for waterproofing and insect repellent is known.

In Patent Document 1, a silicon packing is used between the cover part and the case part that accommodates the cover part to fill the gap between the cover part and the case part, and to fill the gap between the cover part and the case part. A lighting device that prevents flooding and insects from entering a downlight is disclosed.

JP, 2017-68936, A

However, in conventional downlight illumination, each component is often manufactured individually and assembled manually in the post process, which results in poor workability and may cause defective products due to forgetting to attach the packing. It was

The present invention has been made in view of the above problems, and an object thereof is to provide an illuminating device that can be easily manufactured while enhancing the airtightness between the cover portion and the housing portion.

In order to solve the above problems, a lighting device according to the present invention includes a light emitting section having a semiconductor light emitting element, a housing section for housing the light emitting section, and a cover section for covering the light emitting section. Has a cover under portion that comes into contact with the accommodating portion and a cover main body portion, and the cover under portion is a material that is softer than the cover main body portion, and serves as a contact point between the accommodating portion and the cover portion to form a gap. It is arranged to fill.

ADVANTAGE OF THE INVENTION According to this invention, the illuminating device which improves the airtightness of the clearance gap between a cover part and a storage part, and prevents forgetting to attach the packing attached in order to improve waterproofness, insect-proof property, and airtightness is implement|achieved. ..

It is an appearance perspective view of the lighting installation concerning an embodiment. It is a disassembled perspective view of the illuminating device which concerns on embodiment. It is sectional drawing of the illuminating device which concerns on embodiment. It is the perspective view which looked at the cover part of the lighting installation concerning an embodiment from the upper part. It is sectional drawing of the cover part of the illuminating device which concerns on embodiment.

Hereinafter, embodiments will be described with reference to the drawings. The embodiment described below is an example of embodying the present invention and is not intended to limit the present invention.

FIG. 1 is an external perspective view of a lighting device 1 according to the present invention. As shown in FIG. 1, a lighting device 1 according to the present invention is a lighting device that uses, for example, an embedded lighting fixture (downlight) installed in an embedded hole formed in a ceiling member.

The lighting device 1 is attached to a ceiling member, and a power supply circuit for lighting the lighting device 1 is arranged on the upper surface (under the ceiling) of the ceiling member.

The lighting device 1 is electrically connected to a power supply circuit via a power supply line. The power supply circuit is electrically connected to an external commercial AC power supply (not shown), converts electric power input from the commercial AC power supply into DC power, and supplies the DC power to the lighting apparatus 1. The power supply circuit may be incorporated on the substrate of the lighting device 1 integrally with the light emitting unit.

Next, a detailed configuration of the lighting device 1 will be described. 2 is an exploded perspective view of the main configuration of the lighting device 1 according to the present invention, and FIG. 3 is a cross-sectional view of the lighting device 1 according to the present invention. As shown in FIG. 2, the lighting device 1 includes a light emitting unit 2, a housing unit 3 in which the light emitting unit 2 is housed, and a cover unit 4 that covers the light emitting unit 2.

The light emitting portion 2 has a main body portion 21 and an inclined surface 22 that is connected to the lower surface of the main body portion 21 and is inclined from the center toward the outer side surface. The inclined surface 22 has a substantially cylindrical shape and is the center of the substantially cylindrical shape, and the light emitting module 23 is placed in a recess provided in the central portion of the main body portion 21.

The side surface of the main body portion 21 is provided with a convex portion that fixes the cover portion 4 when the cover portion 4 is attached, and the light emitting portion 2 and the cover portion 4 are fixed by fitting the concave and convex portions.

The inclined surface of the inclined surface 22 has a reflection function, and provides more light by reflecting the light when the light emitting module 23 is turned on by the inclined surface 22. In addition, a reflection plate may be separately provided, or a light guide plate may be horizontally provided below the reflection plate.

The light emitting module 23 is, for example, a light emitting module 23 having a substrate and a plurality of semiconductor light emitting elements, and an LED, an organic EL, or the like is used as the semiconductor light emitting element. The light emitting module 23 functions as a light source of the lighting device 1.

The substrate is, for example, a substantially quadrangular substrate, and is made of a material such as aluminum, ceramics, or a heat conductive resin.

The upper surface of the substrate is electrically connected to the contacts of the substrate by directly connecting electrical lines.

A connector for supplying power to the semiconductor light emitting element may be provided on the upper surface of the substrate to be electrically connected to an electric wire, or a terminal may be brought into contact with a contact to be electrically connected.

The reflection plate is a plate-shaped member having a substantially circular shape in a plan view, and is arranged to face the light guide plate. The reflection plate reflects light from the semiconductor light emitting element that guides the light inside the light guide plate.

The reflector is made of a material having a high light reflection such as a highly reflective polycarbonate resin, a highly reflective nylon resin, a highly reflective polybutylene terephthalate resin, and a highly reflective foamed resin.

The light guide plate is an optical member that guides the light emitted by the semiconductor light emitting element to emit light in a plane. The light guide plate is a substantially circular plate-like member similar to the reflection plate, and is formed of a translucent material such as acrylic resin, polycarbonate resin, polystyrene resin, or glass.

The accommodating portion 3 is formed by integrally forming a case mounting portion 32 having a substantially columnar shape above a case body 31 having a substantially trapezoidal cone shape, and is made of, for example, an aluminum alloy, iron or the like, which has excellent heat resistance and heat dissipation. It is made of metal material.

The cover portion 4 is configured by integrally forming a cover body portion 41 and a mounting portion 42 that attaches the cover body portion 41 to the housing portion 3. The cover body portion 41 includes a light emitting portion including a reflection plate 24 and a light guide plate 25. 2 is a substantially cylindrical optical member that covers 2 from above.

The cover portion 4 is formed of a translucent resin such as polyethylene resin, acrylic resin, or polycarbonate resin. The translucent resin used for the cover 4 may be any resin that has light diffusivity, light resistance, and heat resistance, is easy to mold, and is injection-moldable. In the present embodiment, an acrylic resin will be described.

The mounting portion 42 has a substantially circular shape and is mounted so as to fit into a gap formed between the light emitting portion 2 and the housing portion 3. The outer diameter of the mounting portion 42 is the outer diameter of the cover body portion 41. Smaller than.

At the boundary between the cover body 41 and the mounting portion 42, the outer diameter portion of the cover body 41 projects, and the cover under portion 43 is provided on the plane of the projecting portion and on the outer peripheral side of the mounting portion 42. Has been formed.

The cover under portion 43 is a transparent or translucent member that has an action of making the lighting device 1 insect-proof and waterproof, and is less likely to cause a shadow when the lighting device 1 is turned on, and has a thickness of about 2 mm to 4 mm. ..

The cover under portion 43 eliminates a gap formed when the cover portion 4 is attached to the accommodation portion 3, and the cover under portion 43 is attached so as to be in close contact with the accommodation portion 3.

The cover under portion 43 is a substantially circular member that is fused and attached to the boundary portion between the cover body portion 41 and the attachment portion 42, and is formed of, for example, a thermoplastic resin such as styrene resin, orifene resin, or polyethylene resin. To be done.

The thermoplastic resin used for the cover under portion 43 is mainly a thermoplastic elastomer, which is a resin material having a higher elasticity than the resin used for the cover portion 4, and has a hardness in the range of 15 to 40 degrees. The resin material is softer than the resin material used for the part 4.

At this time, the resin material used for the cover under portion 43 is preferably a resin material that deforms at a temperature lower than the melting point of the resin material used for the cover portion 4.

The thermoplastic resin used for the cover under portion 43 may be a resin material that is excellent in light resistance and heat resistance and can be easily molded, and may be formed between the housing portion 3 and the cover portion 4. Any material can be used as long as it can be deformed to fill the gap.

More specifically, the light emitting part 2 is housed in the housing part 3, the cover part 4 is arranged inside the housing part 3 so as to cover the light emitting part 2, and the mounting part 42 is provided on the side surface of the light emitting part 2. It is fixed by fitting into the convex portion.

At this time, a gap may be formed between the housing portion 3 and the cover portion 4, but by disposing the cover under portion 43 having a packing function on the outer peripheral side of the cover portion 4, the cover under portion 43 is accommodated. It has a function of being deformed so as to be crushed so as to follow the shape of the gap between the portion 3 and the cover portion 4, and filling a small gap formed between the housing portion 3 and the cover portion 4.

Thereby, the airtightness between the housing portion 3 and the cover portion 4 is enhanced, and the waterproofness and insect repellency of the lighting device 1 can be enhanced.

Next, a method of manufacturing the cover portion 4 and the cover under portion 43 will be described. Both the cover part 4 and the cover under part 43 are made of a resin material that is molded by injection molding, and the resin material is injected from the injection machine into the mold and naturally cooled.

In the present embodiment, the cover part 4 and the cover under part 43 are molded integrally by two-color molding using the injection molding machine A and the injection molding machine B.

A mold A used for molding the cover part 4 and a mold B used for molding the cover under part 43 are arranged in a vertically overlapping manner, and a thermoplastic resin used for molding the cover part 4 from the injection molding machine A to the mold A. The molds A and B and the injection molding machines A and B are arranged so that the material A is injected and the thermoplastic resin B used for molding the cover under portion 43 is injected from the injection molding machine B into the mold B. It

First, the resin material A is injected from the injection molding machine A into the mold A to mold the cover portion 4. Next, the cover 4 molded by the mold A is moved to the mold B installed above, and the resin material B having a lower melting point than the resin material A is injected from the injection molding machine B into the mold B to cover the cover. The cover under portion 43 is fused and bonded to the portion 4.

At this time, the resin material A is injected from the injection molding machine A into the mold A at the same time as the injection of the resin material B from the injection molding machine B into the mold B, and the next cover part 4 is molded, so that the cover part 4 is formed. 4 and the productivity of the cover under portion 43 can be improved.

By injecting the resin material B during the curing of the resin material A, the resin material B is more easily fused to the resin material A being cured, and is fused with the gap between the cover portion 4 and the cover under portion 43. This can improve the adhesion strength between the two.

Further, although the cover portion 4 and the cover under portion 43 are configured to be fusion-bonded to each other, they may be adhered after molding without fusion,
As described above, the lighting device 1 includes the light emitting unit 2, the housing unit 3 that houses the light emitting unit 2, and the cover unit 4 that covers the light emitting unit 2, and the cover unit 4 contacts the housing unit 3. The cover under section 43 and the cover main body section 41 are provided. The cover under section 43 is a material softer than the cover main body section 41, and the housing section 3 and the cover section 4 form an outer shell.

In this way, the cover under portion 43 is molded in close contact with the cover portion 4 so as not to cause a gap or a shift, whereby the airtightness of the housing portion 3 and the cover portion 4 is enhanced, and the waterproof and insect-proof properties are improved. An excellent lighting device 1 is realized. Further, since the cover under portion 43 having a packing function is closely attached to the cover portion 4 and is molded, it is possible to prevent forgetting to attach the packing.

Further, the cover part 3 and the cover under part 43 are molded by two-color molding so that the cover under part 43 is fused to the cover part 3. As a result, the cover part 3 and the cover under part 43 are fused and molded at the same time. Therefore, it is possible to omit the packing work process which has been conventionally mounted for insect repellent/waterproof purposes, and to manufacture the lighting device 1. It is possible to improve the sex.

Although the illumination device according to the present embodiment has been described above, the present invention is not limited to such an embodiment.

For example, in the above-described embodiment, the light emitting module uses the LED as the light emitting element, but a semiconductor light emitting element such as a semiconductor laser or an organic EL may be used.

Further, in the above embodiment, the outer shape of the cover portion of the lighting device is a substantially circular shape, but may be a shape such as a polygonal shape, an elliptical shape, a polygonal shape close to a circle, or the like that does not lose the function of the lighting device. It may have any shape.

Further, the shape of the cover under portion can be changed according to the shapes of the accommodating portion and the cover portion, and the shape of the cover under portion can be changed so as to completely fill the gap according to the shape of the gap formed by the accommodating portion and the cover portion. Molding is preferred.

Further, in the above-described embodiment, the two dies are vertically arranged in the two-color molding for molding the cover portion and the cover under portion, but the present invention is not limited to this. For example, they may be installed side by side in the left-right direction or may be installed side by side in the vertical direction. Any arrangement may be used as long as the cover formed by the mold A can be moved to the mold B.

Further, in the above-mentioned embodiment, the cover portion and the cover under portion are molded by the two-color molding method by fusion-bonding, but the present invention is not limited to this, and other composite molding methods may be used. You may use.

DESCRIPTION OF SYMBOLS 1 Lighting device 2 Light emitting part 3 Housing part 4 Cover part 21 Main body part 22 Sloping surface 23 Light emitting module 24 Reflecting plate 25 Light guide plate 31 Case main body 32 Case mounting part 41 Cover main part 42 Mounting part 43 Cover under part

Claims (10)

A light emitting portion having a semiconductor light emitting element,
A housing portion housing the light emitting portion,
A cover portion that covers the light emitting portion,
The cover portion has a cover under portion that contacts the housing portion, and a cover body portion,
The cover under section is made of a softer material than the cover body section,
An illuminating device that serves as a contact point between the accommodating portion and the cover portion and is arranged without a gap The cover part is made of a resin material,
The lighting device according to claim 1, wherein the resin material of the cover under portion is a resin material having a hardness lower than that of the resin material of the cover body portion. The lighting device according to claim 1, wherein the cover under portion is formed in close contact with the cover main body portion. The cover portion is molded by injection molding,
The lighting device according to any one of claims 1 to 3, wherein the cover under portion and the cover main body portion are closely formed by two-color molding. The lighting device according to any one of claims 1 to 4, wherein the cover under portion is fused and integrally formed with the main body portion. The lighting device according to claim 1, wherein the first material is a translucent resin. The lighting device according to claim 1, wherein the second material is a thermoplastic resin. The lighting device according to claim 1, wherein the semiconductor light emitting element is an LED. The lighting device according to claim 1, wherein the second material is a styrene thermoplastic resin. The lighting device according to claim 1, wherein the second material is a polystyrene-based thermoplastic resin.

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