JPS5999654A - 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 two reflectors, a light bulb with a reflector, in which a reflector is attached to a light bulb, has become popular for use in store lighting, etc. Furthermore, there is an increasing demand for making the nine-reflector as small as possible. Conventional light bulbs have low heat resistance and cannot be miniaturized, which limits the miniaturization of the reflector. Therefore, recently, non-rogen light bulbs, which have good heat resistance, have been used as an alternative to conventional light bulbs.

[Problems with background technology]

However, in order to increase the efficiency of the 9-reflector, a coiled filament is arranged along the long axis of the bulb, but if the reflector is composed of a single surface, a shadow of the coiled spiral of the filament will appear on the irradiated surface. This was a practical problem.

[Purpose of the invention]

The purpose is to provide a practical reflecting mirror.

[Summary of the invention]

The present invention is characterized in that a halogen light bulb is fixed inside a reflecting mirror having a plurality of reflecting surfaces divided in the axial direction and the circumferential direction.

[Embodiments of the invention]

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

Figures 1 and 2 show a first embodiment of the invention.

(1) is a 100V60W halogen light bulb, (2) is a bulb made of quartz glass with an outer diameter of about 10 mm, (3) is a sealing part made by crushing and sealing the base of this pulp (1), (4 )
is approximately 1.5 mm in diameter located along the centerline of the bulb (1).
4 Ill, a tungsten filament wound into a coil with a length of about 10 mm. In addition, (5) is, for example, when the effective diameter of aluminum is 50 to 60 y, m
, a reflecting mirror with an effective length in the axial direction of 25 to 30 mm.This reflecting mirror (5) is divided into 4 parts in the axial direction, 9 parts in the circumferential direction, and 16 parts in the circumferential direction, and each surface is divided into 4 parts in the axial direction. It consists of a collection of reflective surfaces (6), etc. arranged alternately by 1/2. Also, (7) is a cylindrical body fixed to the base of the reflective mirror (5). .

(8) is a cap attached to one end of this cylindrical body (7),
The sealing part (4) of the halogen light bulb (1) is fixed to the base of the reflecting mirror (5) by means of a cut-and-cut adhesive or the like.

In this way, the reflecting mirror (5) has many reflecting surfaces (6),...
In the case where... is formed, a coiled filament (4
) A good light distribution pattern can be obtained without the spiral shadow appearing on the projection surface.

Further, FIG. 3 shows a second embodiment of the present invention, which is the same as FIG. 1 except for the non-volatile light bulb (1), so a description thereof 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 bulb (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. Many reflective surfaces (6)
, . . . , the spiral shadow of the coiled filament (4) does not appear, and a good light distribution pattern can be obtained.

Furthermore, Fig. 4 shows a change in the formation location of the visible light transmitting infrared reflecting film (9) of the halogen bulb (1) in Fig. 3, and this one has only the side surface along the long axis of the bulb as shown in Fig. 3. A similar infrared reflecting mirror a1 was formed.

In this case as well, almost the same effect as in the second embodiment was obtained.

Note that the present invention is not limited to the embodiments described above; for example, the many reflective surfaces formed on the reflecting mirror may be divided into 4 to 6 parts in the axial direction, 9 and 16 to 20 parts in the circumferential direction. If the number of divisions is small, the spiral shadow of the coil will be seen on the irradiated surface, just like a single surface, and conversely, if the number of divisions is large, the connection angle of each reflective surface will become smaller, shortening the life of the mold used to form the reflecting mirror. Reflectors are expensive.

Further, the single reflecting mirror 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 reflective film formed on the pulp surface of halogen light bulbs is not limited to the layered layer of alternating 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 using a vacuum evaporation method. Further, the reflective film 7 is not limited to the outer surface of the pulp, but may be formed on the inner surface or both the inner and outer surfaces.

〔Effect of the invention〕

Since the halogen light bulb with a reflector of the present invention is composed of a plurality of reflecting surfaces divided into two reflecting mirrors in the axial direction and the circumferential direction, the connection angle of each surface is twice that of one that is simply divided into multiple surfaces. Since the large and axially divided portions are arranged alternately in 1/2 in the circumferential direction, a good light distribution pattern with no unevenness can be obtained. The shape of the reflective surface changes less due to settling, and the mold life is maintained.This value is equivalent to that of a sealed beam type floodlight bulb (beam lamp) 100V75W, and approximately 25% power saving is achieved. The temperature rise on the irradiated surface was also suppressed to about 2°C, compared to 6 to 9°C for a 75W light bulb.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view showing a first embodiment of a halogen light bulb with a reflector according to the present invention, FIG. 2 is a bottom view of FIG. 1,
FIG. 3 is a partially cutaway front view showing the second embodiment;
The figure is a partially cutaway sectional front view of a main part showing another embodiment. (1)・・・・・・・・・No-logen light bulb with reflector (2
)・・・・・・・・・Valve (5)・・・・・・・・・
Reflector (6)...Reflective surface (9), (In...Visible light transmitting infrared reflective film (7317) Agent Patent attorney Noriyuki Chika (and 1 other person) No. Figure 1 Figure 2 Figure 3 Figure 4-25:

Claims (3)

[Claims] (1) A halogen light bulb with a reflector, characterized in that a halogen light bulb is fixed inside a reflector having a plurality of reflective surfaces divided in the axial direction and the circumferential direction. (2) The reflective mirror-equipped halogen according to claim 1, characterized in that each of the reflective surfaces of the reflective mirror is arranged alternately in the circumferential direction at a time of 172 in each axially divided portion. light bulb. (3) The halogen light bulb is equipped with a reflector according to claim 1, wherein a visible light transmitting infrared reflecting film is formed on substantially the entire surface of the bulb or at least on a side surface along the long axis of the bulb. halogen light bulb.