JP4183773B2 - lighting equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lighting fixture.
[0002]
[Prior art]
In a luminaire with a front panel using a lamp that does not reach a high temperature, such as a fluorescent lamp, the inside of the fixture does not become hot and the lamp is not damaged. For this reason, there is no need to provide a structure that prevents damage to the front panel due to lamp breakage. If a structure that prevents external deformation or damage to the panel due to external impact or external pressure is applied, panel damage will not occur. No problem.
[0003]
On the other hand, in a lighting fixture that uses a halogen lamp (the lamp surface is about 700 ° C.) that becomes high when it is turned on, it is necessary to provide a structure for preventing the panel from being damaged due to a lamp failure. For this reason, the tempered glass is mainly used for the front panel in the halogen lamp luminaire.
A conventional example of this type is shown in FIGS. That is, this lighting fixture is a ceiling embedded type, 70 is a fixture body, 71 is a lamp socket, 72 is a mini halogen lamp, 73 is a reflector, 74 is a cone, 75 is a cone fixture, 76 is a tempered glass receiver, Reference numeral 77 denotes a plurality of glass pressers arranged at intervals of 120 degrees on the periphery of the tempered glass 78, and 79 denotes a ceiling.
[0004]
[Problems to be solved by the invention]
However, the tempered glass 78 is more stressed toward the peripheral edge of the tempered glass 78 in the process of manufacturing, and the stress changes along the radial direction from the peripheral surface 78a to the radially inner side of about 3 mm. It can be seen that there is strong stress in the part. That is, in the polarization microscope observation, as shown in FIG. 7, the compressive stress and the tensile stress are alternately repeated in the order of the compressive stress range a and the tensile stress range b in the range of about 3 mm from the peripheral surface 78a to the radially inner side. ing.
[0005]
It has been confirmed that, when the peripheral edge portion is in contact with lamp fragments such as lamp glass and lamp glass that are hot when the lamp is broken, the tempered glass 78 may be subjected to a thermal shock and the tempered glass 78 may be broken.
Accordingly, an object of the present invention is to provide a luminaire that can prevent breakage of tempered glass due to breakage of a halogen lamp.
[0006]
[Means for Solving the Problems]
Lighting device according to claim 1, the inner peripheral surface of the opening as well as have a reflector around the halogen lamp have a lamp socket for halogen lamps in the opening having an opening mounted to the lamp socket And an instrument main body having a locking projection, and a compressive stress and a tensile stress alternately and continuously in a range of about 3 mm from the peripheral surface to the radially inward direction. The tempered glass is provided separately from other members and is a ring shape made of stainless steel, the inner peripheral side is formed into an inner collar shape, and the surface is formed in a mirror surface, and the inner peripheral side of the peripheral portion of the tempered glass a reinforced glass protective member for preventing the fragments of the halogen lamp to cover the entire circumference of the halogen lamp-side surface that contacts the part up to the peripheral edge radially inwardly about 3mm from part of the tempered glass, A front glass mounting frame that has a mounting locking portion that is detachably locked to the convex portion from the front of the opening of the writing instrument body and holds the peripheral edge of the tempered glass. .
[0007]
According to the lighting apparatus of claim 1, since the tempered glass protective member that covers the entire periphery of the peripheral portion of the tempered glass is provided, the halogen lamp should be broken, and fragments such as high-temperature filament and lamp glass are strengthened. Even if it comes into the glass, it does not contact the peripheral edge of the tempered glass, so that the tempered glass can be prevented from being damaged.
[0008]
Further, the surface of the tempered glass protective member is a mirror surface, and since the light of the halogen lamp does not heat the tempered glass protective member, the outer temperature rise can be suppressed and the light of the halogen lamp does not irradiate the peripheral portion of the tempered glass. The temperature at the peripheral edge of the tempered glass is reduced, and the temperature rise at the center of the tempered glass, which is the highest temperature part, can be suppressed.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
A first embodiment of the present invention will be described with reference to FIGS. That is, the lighting fixture includes a fixture main body 1, a tempered glass 2, and a tempered glass protection member 3.
The appliance body 1 has an opening 4 and a lamp socket 5 for a halogen lamp in the opening 4. In the embodiment, the instrument body 1 is provided with an arm 6 at the upper end, and the flange 6a at the upper end of the arm 6 is attached to the ceiling (not shown). The lamp socket 5 is attached to the fixture body 1, the shade 7 is integrally attached to the fixture body 1 with screws 8 so as to cover the front periphery of the lamp socket 5, and the front glass mounting frame 18 is attached to the front end of the shade 7. . Further, a substantially cylindrical mirror support member 11 surrounding the halogen lamp 10 mounted in the lamp socket 5 is attached to the shade 7 with a screw 12, and a Dycool mirror 13 is inserted into the mirror support member 11, thereby providing a Dycool mirror. 13 is passed through the halogen lamp 10 and locked to the inner collar 14 of the socket side end of the mirror support member 11, and is fixed to a circumferential groove 15 formed on the inner periphery of the opening side end of the mirror support member 11. 16 and the die cool mirror 13 is pressed and fixed by the fixing ring 16. The halogen lamp 10 is a mini halogen lamp.
[0010]
The tempered glass 2 is provided on the instrument body 1 so as to close the opening 4. In the embodiment, the tempered glass 2 is placed on the lamp socket 5 side of the inner collar 19 formed on the inner periphery of the front glass mounting frame 18.
The tempered glass protection member 3 is provided on the fixture body 1 so as to cover the entire periphery of the peripheral edge 2a of the tempered glass 2 on the lamp side, and the fragments of the halogen lamp 10 are in contact with the peripheral edge 2a of the tempered glass 2. To prevent. The tempered glass protection member 3 according to the embodiment is formed in a ring shape with a stainless steel material having a mirror surface and is bent so that the inner peripheral side is lowered, and the peripheral portion 2a of the tempered glass 2 is formed on the inner peripheral side. A width of about 5 mm is covered from the outer periphery to the inner side in the radial direction, and the outer peripheral side is attached to the front glass attachment frame 18 with screws 17 to fix the tempered glass 2a. The front glass mounting frame 18 is provided with a flange on the outer periphery, and a notch recess (not shown) through which the locking portion 7a at the tip of the shade 7 is passed is formed in the collar. It is attached to the locking portion 7a of the shade 7.
[0011]
In this luminaire, the halogen lamp 10 is turned on by supplying power to the lamp socket 5, direct light is transmitted through the tempered glass 2 and radiated to the outside, the dichroic mirror 13 is reflected and the tempered glass 2 is transmitted, Illumination is performed by these.
According to this embodiment, since the tempered glass protective member 3 covering the entire periphery of the peripheral edge 2a of the tempered glass 2 is provided, the halogen lamp 10 should be damaged, and fragments such as filaments and lamp glass that are hot. Even if it comes to the tempered glass 2, the peripheral edge 2a of the tempered glass 2 is not brought into contact with it, so that the tempered glass 2 can be prevented from being damaged. Therefore, a filament or the like that is hot at the time of lamp breakage does not come into contact with a portion where the stress distribution in the range of about 3 mm changes inward from the outer periphery of the tempered glass 2.
[0012]
Further, since the surface of the tempered glass protection member 3 is a reflection surface, the light from the halogen lamp 10 does not heat the tempered glass protection member 3, so that an increase in the outer temperature can be suppressed, and the light from the halogen lamp 10 can be Since 2a is not irradiated, the temperature of the peripheral part 2a of the tempered glass 2 is reduced, and the temperature rise at the center of the tempered glass 2 which is the highest temperature part can be suppressed.
[0013]
A filter such as a color plate or a diffusion plate may be bonded to the outer surface of the inner collar 19 of the front glass mounting frame 18 by bonding or the like.
3 and 4 are reference examples. That is, this lighting fixture is a ceiling-embedded type, and the fixture body 1 attached by a ceiling fixture (not shown) is provided with a lamp socket 5 in the center of the top, and a halogen lamp 10 is attached to the lamp socket 5. Yes. Further, a reflector holder 20 is provided so as to surround the lamp socket 5, and a bowl-shaped cone mounting spring 21 that protrudes toward the center is provided on the inner surface of the instrument body 1. When a front glass mounting frame 23 having a diameter larger than that of the cone 22 is attached to the upper end portion of the cone 22 and the cone 22 is inserted into the instrument body 1, the front glass mounting frame 23 gets over the bent portion of the cone mounting spring 21 and is locked. Thus, the cone 22 is attached to the instrument body 1. The tempered glass 2 is placed on the front glass mounting frame 23, and the peripheral edge 2 a that is not less than the range of about 3 mm radially inward from the peripheral surface of the tempered glass 2 is positioned outward from the inner peripheral surface of the reflector 24. A trumpet reflector 24 having an inner diameter smaller than the outer diameter of the tempered glass 2 is placed on the tempered glass 2, and the upper end of the reflector 24 is passed through the halogen lamp 10 to the reflector receiver 20 with a cone mounting spring. 21 is engaged. Therefore, the reflecting plate 24 also serves as the tempered glass protection member 3. A frame 27 covers the edge of the embedding hole 26 of the ceiling material 25.
[0014]
According to this embodiment, since the inner diameter of the opening of the reflector 24 is smaller than the outer diameter of the tempered glass 2, the peripheral edge 2a of the tempered glass 2 can be positioned outside the reflector 24, and the halogen lamp 10 Will not reach the peripheral edge 2 a of the tempered glass 2. Further, the light from the halogen lamp 10 cannot irradiate the peripheral portion 2a. For this reason, there exists an effect similar to 1st Embodiment.
[0015]
【The invention's effect】
According to the lighting apparatus of claim 1, since the tempered glass protective member that covers the entire periphery of the peripheral portion of the tempered glass is provided, the halogen lamp should be broken, and fragments such as high-temperature filament and lamp glass are strengthened. Even if it comes into the glass, it does not contact the peripheral edge of the tempered glass, so that the tempered glass can be prevented from being damaged.
[0016]
Further, the surface of the tempered glass protective member is a mirror surface, and since the light of the halogen lamp does not heat the tempered glass protective member, the outer temperature rise can be suppressed and the light of the halogen lamp does not irradiate the peripheral portion of the tempered glass. The temperature at the peripheral edge of the tempered glass is reduced, and the temperature rise at the center of the tempered glass that is the highest temperature part can be suppressed.
[Brief description of the drawings]
FIG. 1 is a partially cutaway side view of a first embodiment of the present invention.
FIG. 2 is a partially enlarged view thereof.
FIG. 3 is a cross-sectional view of a reference example .
FIG. 4 is a partially enlarged view thereof.
FIG. 5 is a half sectional side view of a conventional example.
FIG. 6 shows tempered glass, (a) is a side view, and (b) is a plan view.
FIG. 7 is an explanatory diagram for explaining the stress at the peripheral edge of the tempered glass.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Apparatus body 2 Tempered glass 3 Tempered glass protective member 4 Opening 5 Lamp socket 10 Halogen lamp

Claims (1)

A convex portion for engagement with the inner peripheral surface of the opening with its opening has an opening have a lamp socket for halogen lamps to have a reflector around the halogen lamp mounted to the lamp socket An instrument main body, a tempered glass that is arranged so as to close the opening, and in which a compressive stress and a tensile stress are alternately continued in a range of about 3 mm from the circumferential surface to the radially inner side , and other members The ring is made of stainless steel, and the inner peripheral side is formed into an inner brim shape, and the surface is formed as a mirror surface, and the entire surface of the peripheral edge of the tempered glass on the halogen lamp side is formed on the inner peripheral side. a tempered glass protective member a circumferential covered debris of the halogen lamps to prevent the contact with the portion to the peripheral edge radially inwardly about 3mm from part of the tempered glass, the opening of the instrument body Lighting device with a front glass mounting frame which has a locking portion for mounting the freely engaging removably from the front to the projecting portion for holding the periphery of the tempered glass.

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