JPS5999655A - Halogen bulb with reflecting mirror - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Technical field of invention] The present invention relates to the structure of a halogen light bulb with a reflector.

[Technical background of the invention]

In recent years, instead of the method of attaching a light bulb to a fixture having nine reflectors, light bulbs with a reflector, in which a reflector is attached to a light bulb, have become popular for purposes such as store lighting. Furthermore, there is an increasing demand for making the nine-reflector as small as possible. In order to miniaturize the reflector, conventional light bulbs have low heat resistance and cannot be miniaturized, which limits the miniaturization of the reflector. Therefore, in recent years, halogen light bulbs with good heat resistance have come to be used instead of conventional light bulbs.

[Problems with background technology]

However, in order to increase the efficiency of a single reflecting mirror, coiled filaments are arranged along the long axis of the pulp, and if the reflecting mirror is composed of a single surface, the shadows of the coiled spirals of the filaments will appear in concentric circles on the irradiated surface. This caused a problem in practical use as it was difficult to obtain good light distribution.

[Purpose of the invention]

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to improve the light distribution characteristics of a single reflecting mirror and to provide an inexpensive and practical reflecting mirror.

[Summary of the invention]

The present invention is characterized in that a halogen light bulb whose filament axis is aligned parallel to the axis of the reflecting mirror is fixed to a reflecting mirror having a reflecting surface consisting of a large number of minute uneven surfaces.

[Embodiments of the invention] The details of the invention will be explained by means of illustrated embodiments.

1 and 2 show examples of the present invention, (1) is 1O
Ov60W halogen bulb f, (a bulb made of quartz glass with an outer diameter of about 2m and about 1O, (3) is the sealing part formed by crushing and sealing the base of this bulb (1), (4) is the bulb (1)
It is a tungsten filament wound into a coil with a diameter of about 1.4 Nn and a length of about 10 mm, which is arranged along the center line of the filament. In addition, (5) is, for example, made of aluminum with an effective diameter of 50 to 60 mm + axial effective length of 25 to 3
0mm reflector, this reflector (5) has two paraboloids (f1=8.5.f2=11) with different focal points.
．． 5), and its reflective surface has many minute uneven surfaces (6
),..., consists of a collection of... In addition, (the force is applied to the cylindrical body fixed to the base of the reflector (5), (8
) is a cap attached to one end of the cylindrical body (a cap attached to one end of the cylindrical body), and a sealing part (4) of the halogen light bulb (1) is attached to the base of the reflector (5) by cutting and using adhesive or the like. is fixed.

In this way, the reflecting mirror (5) has many minute uneven surfaces (6).

. . . , the spiral shadow of the coiled filament (4) does not appear on the projection surface and a good light distribution pattern can be obtained.

Further, FIG. 3 shows another embodiment of the present invention, which is the same as FIG. 1 except for the non-rogen light bulb (1), so its explanation will be omitted. In Figure 3, (9) is a visible light-transmissive infrared reflective film formed by alternately layering 5 to 7 layers of a metal oxide with a low refractive index such as silica and a metal oxide with a high refractive index such as titanium oxide. It is formed on almost the entire surface of the pulp (2) except for the sealing part (4).

In this case, the infrared rays emitted from the filament (4) can be returned to the filament (4) again by the visible light transmitting infrared reflecting film (9) formed over almost the entire surface of the pulp (2), improving efficiency. A reflecting mirror (
5), a good light distribution pattern can be obtained without the spiral shadow of the coiled filament (4) appearing.

Note that the present invention is not limited to the above-described embodiments; for example, the reflecting mirror is not limited to two stages of reflecting mirrors with different focal points, but may be a single reflecting mirror or three or more stages, and the material may be The material is not limited to aluminum, and may be made of other metals, glass, or ceramics, as long as a reflective layer is formed on its surface.

Furthermore, the visible light transmitting infrared reflecting film formed on the pulp surface of halogen light bulbs is not limited to the one made by alternately layering low refractive index materials and high refractive index materials; It may be sandwiched between thin films of materials or coated with tin oxide, indium oxide, or the like by vacuum evaporation. Furthermore, the visible light transmitting and infrared reflecting film may not be formed on the entire surface of the pulp, but may be formed only on the side surfaces along the long axis excluding the top of the pulp.

Furthermore, the Vc and 2 reflective films are not limited to the outer surface of the pulp, but may be on the inner surface or on both the inner and outer surfaces.

〔Effect of the invention〕

In the halogen light bulb with a reflector of the present invention, since the nine reflectors were composed of a reflecting surface consisting of a large number of minute uneven surfaces, a good light distribution pattern without unevenness was obtained. In addition, 9 the present invention is 1
In the case of a 00V60W light bulb with an infrared reflective film shown in Figure 3, the center luminous intensity is 4000cd (1m), 1/2
A uniform irradiation surface can be obtained with a beam angle of 20', and this value is a sealed beam type floodlight bulb (beam lamp) 100V75
W and In, approximately 25% power saving was achieved, and
The temperature rise on the irradiated surface was also suppressed to about 2°C, compared to 6 to 9°C for the 75W bulb.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a partially cutaway front view showing an embodiment of the halogen light bulb with a reflector according to the present invention, FIG. 2 is a bottom view of FIG. 1, and FIG.
The figure is a partially cutaway sectional front view showing another embodiment. (1)...Halogen bulb with reflector, (2) Machida bulb. (5)...Reflector, (6)...Concave reflective surface. (9) , (II... Visible light transmitting infrared reflective film. Agent: Patent attorney Noriyuki Chika (and 1 other person) Figure 1 Figure 3 Figure 2

Claims (2)

[Claims] (1) A halogen light bulb with a reflector, characterized in that a halogen light bulb with a filament axis aligned parallel to the axis of the reflector is fixed to a reflector having a reflective surface made up of many minute uneven surfaces. (2) The reflector according to claim 1, wherein the halogen light bulb has a visible light transmitting infrared reflecting film formed on substantially the entire surface of the bulb or at least on the side surface along the long axis of the bulb. Comes with halogen light bulb.