JP6823115B1 - Light source cover for emergency lights of explosion-proof lighting equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source cover for an emergency light capable of realizing an emergency light which does not impair the sense of unity in design with an explosion-proof lighting fixture. SOLUTION: In an emergency light housing 20 mounted on an explosion-proof lighting fixture 1, the emergency light housing 20 is provided with heat resistance and impact resistance arranged in an exposed state on the front surface of a light source 11 which is lit by power supply from a secondary battery. A light source cover 4 for an emergency light made of tempered glass, in which a dome-shaped lens portion 40 that diffuses the light emitted from the light source 11 in a conical shape is formed on the front surface, while the back surface side of the lens portion 40 is formed. In addition to forming a circular recess 42 facing the light source 11, a fitting step portion 43 into which the edge portion of the mounting substrate 12 of the light source 11 is fitted is formed in the opening edge of the recess 42 and connected to the mounting board 12. It is characterized in that a concave groove 44 for receiving the fed feed line 13 is continuously formed in the fitting step portion 43. [Selection diagram] Fig. 3

Description

The present invention includes, for example, a pressure-resistant explosion-proof lighting fixture used for lighting indoor and outdoor explosion-proof areas such as an oil plant, a chemical factory, a general factory, a plant, and a warehouse, a safety-enhanced explosion-proof lighting fixture, and the like. The present invention relates to a light source cover for an emergency light that covers the light source of the emergency light provided in.

Patent Document 1 discloses a lighting device including a secondary battery. This lighting device is an emergency light that lights up in an emergency such as a power failure, and is an embedded type that is embedded and installed in a ceiling surface that is an upper mounting surface such as a corridor or a passage.

The main components are the main body, the unit part as a unit housed in this main body, the secondary battery which is an emergency power supply, the terminal block connected to the external power supply, and the decorative frame as a support structure. is there.

The main body is formed of a metal such as aluminum, and has a substantially covered cylindrical shape having an opening covered with a decorative frame at the lower end.

The unit unit includes a housing made of, for example, synthetic resin or metal, a light source having a light emitting element that emits light downward, and an optical control member that controls the light distribution of the light emitted from the light source. It is equipped with a lens as.

The light source includes a light source substrate, and a plurality of the above-mentioned light emitting elements are mounted on the light source substrate. Then, this light source is integrally fixed to the mounting surface portion of the housing of the unit portion.

The lens diffuses the light emitted from the light source, and is formed of a translucent member such as glass or a synthetic resin such as polycarbonate having heat resistance, and is arranged so as to cover the light source. In this lens, the outer peripheral portion has a circular shape that follows the shape of the protruding portion of the mounting surface portion of the housing, and the lower portion, which is the exit surface from which light is emitted, bulges downward in a spherical shape (dome shape). The light from the light source is diffused so as to have the light distribution characteristics specified by the predetermined standard of the emergency light. It is said that this lens may have glass provided on the surface of a synthetic resin.

Japanese Unexamined Patent Publication No. 2018-139222

By the way, the applicant of the present application has proposed a straight tube type LED lamp as an explosion-proof lighting fixture (see Japanese Patent No. 6188851). In recent years, there has been a demand for explosion-proof lighting fixtures of this type equipped with an emergency light that lights up in an emergency such as a power failure. In order to respond to this, a method of connecting an emergency lamp equipped with a metal housing having excellent heat resistance, impact resistance and pressure resistance to one end of the LED lamp is adopted, but in that case, the LED lamp and It is desirable to adopt a housing with a shape that does not impair the sense of unity. At the same time, it is essential that the emergency lamp has explosion-proof properties as well as the LED lamp. In this way, the emergency light provided in the explosion-proof lighting equipment is subject to two conditions, shape (size) and explosion-proofness. Therefore, in order to meet the above requirements, the emergency light should be miniaturized and explosion-proof. It is necessary to eliminate the factors that hinder the.

Here, when considering the adoption of the lighting device as disclosed in Patent Document 1 as the emergency light provided in the explosion-proof lighting equipment as described above, the lighting device is provided only on the ceiling of a general building or the like. It is not intended for use in explosion-proof areas. Therefore, if the lighting device is intentionally used as an emergency light for an explosion-proof lighting device as described above, the lens of the lighting device is formed of ordinary glass or a synthetic resin such as polycarbonate having heat resistance. Since the explosion-proof property is not guaranteed, the lens cannot be provided in the exposed state as well as the housing as it is. Therefore, in order to impart explosion-proofness to the lighting device, it is necessary to cover the lens by, for example, arranging tempered glass having heat resistance and impact resistance on the outside of the lens.

However, in that case, the light source portion of the emergency light becomes bulky because the tempered glass is provided on the outside of the lens, so that the structure of the portion becomes complicated and the housing becomes large. Therefore, it is not possible to obtain an emergency light having a sense of unity with the explosion-proof lighting fixture (LED lamp).

The present invention has been made to solve the above problems, and is an emergency light that does not impair the sense of unity in design with the explosion-proof lighting fixture, in other words, has a high degree of freedom in design design. It is an object of the present invention to provide a light source cover for an emergency light capable of realizing an emergency light.

In order to achieve the above object, the light source cover for an emergency light of the explosion-proof lighting fixture of the present invention is a heat-resistant and impact-resistant emergency light housing to be attached to the explosion-proof lighting fixture. A light source cover for emergency lights made of reinforced glass with heat resistance and impact resistance, which is arranged in the exposed state on the front of the light source, which is a light source that lights up by the power supply from the secondary battery built in the body. A dome-shaped lens portion that diffuses the light emitted from the light source in a conical shape is formed on the front surface, while a circular concave portion facing the light source is formed on the back surface side of the lens portion. An fitting step portion into which the edge portion of the mounting substrate of the light source is fitted is formed in the opening edge of the recess, and a concave groove for receiving a feeding line connected to the mounting board is continuously formed in the fitting step portion. It is characterized by being formed.

According to this specific matter, the light source cover for the emergency light itself is made of tempered glass having heat resistance and impact resistance, and has a lens portion for diffusing the light emitted from the light source of the emergency light. Therefore, as a result of eliminating the need for any member for ensuring the explosion-proof property of the lens portion, there is no possibility that the light source portion becomes bulky. Further, a circular recess facing the light source is formed on the back surface side of the lens portion of the light source cover for an emergency light, and an fitting step portion into which the edge portion of the light emitting element mounting substrate is fitted is formed in the opening edge of the recess. Since the concave groove that is formed and further receives the power supply line connected to the mounting board is continuously formed in the fitting step portion, the back side of the light source cover for the emergency light can be flattened, and as a result, the emergency light can be flattened. The entire light source portion including the light source cover for use can be made thinner. Therefore, since there is no concern that the housing of the emergency light becomes large due to the structure of the light source portion, there is no possibility that the degree of freedom is impaired when setting the design with a sense of unity with the explosion-proof lighting equipment.

Further, in the emergency light source cover of the explosion-proof lighting fixture, the light emitted from the charging indicator lamp indicating the charging status of the secondary battery in the emergency light housing is used for the emergency light. A translucent portion that transmits light to the outside of the housing may be continuously and integrally provided with the lens portion.

In this case, it is not necessary to separately provide a translucent portion for the charging indicator lamp in the housing, and the structure of the housing can be simplified accordingly.

According to the present invention, it is possible to provide a light source cover for an emergency light that can realize an emergency light that does not impair the sense of unity in design with an explosion-proof luminaire.

It is an overall perspective view which shows the explosion-proof type luminaire which provided the emergency light with the light source cover for the emergency light which concerns on embodiment of this invention. It is a schematic central vertical sectional view which shows only the main part in an emergency light. It is a perspective view which shows the light source cover for an emergency light, (a) shows the front surface side, (b) shows the back surface side. It is a schematic exploded perspective view of the lid body of an emergency light housing and the main parts attached to the lid body as viewed from the back surface side. It is a schematic exploded perspective view of the lid body of an emergency light housing and the main parts attached to the lid body as viewed from the surface side thereof.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is an overall perspective view showing an explosion-proof lighting fixture provided with an emergency light provided with a light source cover for an emergency light according to an embodiment of the present invention, and FIG. 2 is a schematic center showing only a main part in the emergency light. A vertical sectional view, FIG. 3 is a perspective view showing a light source cover for an emergency light, and FIG. 4 is a schematic exploded perspective view of a lid of an emergency light housing and main parts attached to the lid from the back side thereof. FIG. 5 is a schematic exploded perspective view of the lid of the emergency light housing and the main parts attached to the lid, as viewed from the surface side thereof.

The explosion-proof lighting fixture 1 is a lighting fixture that uses a light emitting diode (LED) or the like as a light source. As shown in FIG. 1, the explosion-proof luminaire 1 includes a straight tube type light source accommodating tube 1a in which an LED is housed, and the light emitted from the light source accommodating tube 1a is in front of the straight tube type light source accommodating tube 1a. The irradiated area is illuminated as the direct light that is directed and the reflected light that is reflected by the reflector 1b provided behind the direct light. The explosion-proof luminaire 1 as described above is attached to, for example, the tip of a pole hung from the ceiling in a building or erected from an indoor floor surface or an outdoor road surface.

An emergency light 2 is provided at the tip of the explosion-proof lighting fixture 1. The width dimension and the height dimension of the emergency light 2 are aligned with those of the explosion-proof lighting fixture 1, and both side surfaces and the top surface of the emergency light 2 are aligned with each other while the emergency light 2 is provided on the explosion-proof lighting fixture 1. By covering with one decorative cover 3, the explosion-proof lighting fixture 1 and the emergency light 2 are integrated. The emergency light 2 as described above includes an emergency light housing 20 having heat resistance and impact resistance, and as shown in FIG. 2, a housing body 21 having an opening on the lower surface and the housing It has a lid 22 that closes the opening of the main body 21.

As shown in FIGS. 1, 4 and 5, the lid 22 of the emergency light housing 20 is formed with a substantially teardrop-shaped bulge 23 on its surface. The bulging portion 23 is provided with a light source cover mounting opening 24 to which the emergency light light source cover 4 is mounted on the large diameter side, and a power switch mounting portion 25 and a charge confirmation switch on the small diameter side. A mounting portion 26 is attached. The light source cover mounting opening 24 is composed of a lens exposure port 24a corresponding to the lens portion 40 of the emergency light light source cover 4 described later, and a light transmission portion exposure port 24b corresponding to the light transmission portion 41. Further, on the back surface side of the bulging portion 23, a recessed portion 27 having a shape matching the outer shape of the light source cover 4 for an emergency light is formed so as to surround the lens exposed port 24a and the translucent portion exposed port 24b. ing. Further, the lid 22 is provided with insertion holes 28 for fixing screws 5 at eight locations on the peripheral edge thereof.

As shown in FIG. 2, the inside of the housing body 21 is in contact with the charging indicator 6, the circuit board 7 on which the charging indicator 6 is mounted, and the contact member 8 mounted on the circuit board 7. A charge confirmation switch 9 is provided, and the circuit board 7 is arranged at a position raised from the lid 22 by a support shaft 10 erected on the support shaft mounting seat 29 of the lid 22. Actually, members and parts necessary for an emergency light such as a secondary battery and other control circuit boards are provided in the housing main body 21, but since they are not directly related to the present invention, they are shown and described here. Omit. Reference numeral 14 in the figure indicates a power switch for turning on / off the emergency light.

The light source cover 4 for an emergency light is arranged in an exposed state on the front surface of a light source (a light source with a substrate in which a light emitting element is mounted on a substrate) 11 that is lit by power supply from a secondary battery in the above-mentioned emergency light housing 20. Is to be done. The light source cover 4 for an emergency light is made of tempered glass having heat resistance and impact resistance, and has translucency. The plate thickness (thickness of the area other than the lens portion 40) of the light source cover 4 for an emergency light is set in consideration of the explosion-proof performance required for the explosion-proof luminaire 1 and the workability of the cover itself. Specifically, the thickness is set so that it will not crack even in a drop impact test in which a 1 kg iron ball, which is performed as an explosion-proof test, is dropped and collided with a subject from a height of 40 cm.

As shown in FIGS. 2, 3 and 5, a dome-shaped lens portion 40 that diffuses the light emitted from the light source 11 with a substrate in a conical shape is provided on the surface of the light source cover 4 for an emergency light. A bulge is formed. Further, a circular recess 42 facing the light source 11 with a substrate is formed on the back surface side of the lens portion 40, and the fitting step portion 43 into which the edge portion of the light source 11 with a substrate is fitted into the opening edge of the recess 42. Is formed, and recessed grooves 44, 44 for receiving the feeding line 13 connected to the light source 11 with a substrate are continuously formed in the fitting step portion 43. Further, the light source cover 4 for an emergency light is formed in a substantially teardrop shape in a plan view, and the lens portion 40 is arranged on the large diameter side, while the charging indicator light 6 is arranged on the small diameter side. It is a translucent portion 41 that transmits the light emitted from the light source to the outside of the emergency light housing 20. Reference numeral 12 in the drawing indicates a heat radiating sheet attached to the back surface of the light source 11 with a substrate.

As shown in FIGS. 4 and 5, the emergency light source cover 4 is fitted into the recessed portion 27 of the lid 22 via the packing 15a. Then, the light source 11 with a substrate on which the feeder line 13 is mounted is mounted on the light source cover 4 for an emergency light by fitting the edge portion thereof into the fitting step portion 43. Further, a cover fixing plate 16 is attached from behind the emergency light light source cover 4 via the packing 15b, and the cover fixing plate 16 is fixed to the lid 22 with four screws 17 in that state. The light source cover 4 for a lamp is fixed to the lid 22. The cover fixing plate 16 is provided with a fixing opening 16a corresponding to the light source 11 with a substrate, and a through hole 16b corresponding to the light transmitting portion 41 and the charging indicator lamp 6. Then, the light source 11 with a substrate mounted on the light source cover 4 for an emergency light is pressed from behind by the light source holding piece 18 having the pressing portion 18a recessed in the central portion via the pressing portion 18a and the heat radiating sheet 12. In this state, both ends of the light source holding piece 18 are fixed to the cover fixing plate 16 with two screws 19, so that they are fixed to the fitting step portion 43 of the light source cover 4 for an emergency light. As a result, the light source 11 with a substrate is arranged at a predetermined position with respect to the lens portion 40, and the light emitted from the light source 11 with a substrate enters the lens portion 40 via the recess 42, and is here. It is diffused in a conical shape at an angle. Further, the feeder lines 13 and 13 connected to the light source 11 with a substrate are housed in the concave grooves 44 and 44 and do not interfere with the light source holding piece 18.

In the embodiment described above, the emergency light source cover 4 itself is made of tempered glass having heat resistance and impact resistance, and has a lens portion 40 that diffuses the light emitted from the light source 11 of the emergency light. Therefore, as a result of eliminating the need for any member for ensuring the explosion-proof property of the lens portion 40, there is no possibility that the light source portion becomes bulky. Further, a circular recess 42 facing the light source 11 with a substrate is formed on the back surface side of the lens portion 40 of the light source cover 4 for an emergency light, and the edge of the light source 11 with a substrate is fitted into the opening edge of the recess 42. Since the fitting step portion 43 to be fitted is formed, and the recessed grooves 44, 44 for receiving the feeding line 13 connected to the light source 11 with a substrate are continuously formed in the fitting step portion 43, the light source cover for an emergency light is formed. As a result of being able to flatten the back surface side of 4, it is possible to reduce the thickness of the entire light source portion including the light source cover 4 for emergency lights. Therefore, since there is no concern that the emergency light housing 20 of the emergency light 2 becomes large, there is no possibility that the degree of freedom is impaired when setting the design having a sense of unity with the explosion-proof lighting fixture 1.

Further, a translucent portion 41 that transmits light emitted from the charging indicator lamp 6 indicating the charging status of the secondary battery in the emergency light housing 20 to the outside of the emergency light housing 20 is continuously connected to the lens portion 40. Since it is integrally provided, it is not necessary to separately provide a translucent portion for the charging indicator light 6 in the emergency light housing 20, and the structure of the emergency light housing 20 can be simplified accordingly. Can be planned.

The above embodiments are exemplary in all respects and do not provide a basis for limited interpretation. Therefore, the technical scope of the present invention is not construed solely by the above-described embodiments, but is defined based on the description of the claims. It also includes all changes within the meaning and scope of the claims.

1 Explosion-proof lighting equipment 2 Emergency light 20 Emergency light housing 21 Housing body 22 Lid body 4 Emergency light light source cover 40 Lens part 41 Translucent part 42 Recessed 43 Fitting step part 44 Recessed groove 11 Light source with substrate (light emitting element) )
12 Heat dissipation sheet 13 Feed line

Claims (2)

In a heat-resistant and impact-resistant emergency light housing mounted on an explosion-proof lighting fixture, on the front of a light emitting element that is a light source that lights up by power supply from a secondary battery built in the emergency light housing. A light source cover for emergency lights made of tempered glass with heat resistance and impact resistance that is arranged in an exposed state.
A dome-shaped lens portion that diffuses the light emitted from the light source in a conical shape is formed on the surface, while a circular recess facing the light source is formed on the back surface side of the lens portion. An fitting step portion into which the edge portion of the mounting substrate of the light emitting element is fitted is formed at the opening edge of the recess, and a concave groove for receiving a feeding line connected to the mounting board is continuously formed in the fitting step portion. A light source cover for emergency lights of explosion-proof lighting equipment, which is characterized by being formed. The light source cover for an emergency light of the explosion-proof lighting fixture according to claim 1.
Further, a translucent portion that transmits light emitted from a charging indicator lamp indicating the charging status of the secondary battery in the emergency light housing to the outside of the emergency light housing is continuously provided to the lens portion. A light source cover for emergency lights of explosion-proof lighting equipment, which is characterized by being integrally provided.

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