JPH0572042U - Halogen bulb with reflector - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To prevent the temperature rise of the reflector and effectively reflect the visible light emitted from the halogen bulb. [Structure] Filament 5 formed at one end of tubular valve 1
A sealing portion 2 formed by embedding a molybdenum introducing foil 3 connected to an inner conductor 4 that supports the sealing wire, and a sealing-side curved portion 12 connected to the sealing portion and bent toward the outside.
A halogen light bulb comprising a visible light transmitting infrared reflecting film 7 formed on the sealing side curved portion, a screw-type base 8 attached to the sealing portion, and a reflector incorporating the halogen light bulb. It is equipped with. Infrared rays radiated in the sealing portion direction are reflected in the filament direction by the visible light transmitting infrared reflecting film formed in the sealing side curved portion and do not reach the outside in the sealing portion direction. Do not heat. Visible light enters the visible light transmitting infrared reflecting film formed on the sealing side curved portion at a relatively small incident angle, and visible light in an appropriate wavelength range is reflected by the reflector and projected.

Description

[Detailed description of the device]

[0001]

[The purpose of the device]

[0002]

[Industrial applications]

 The present invention relates to a halogen bulb with a reflector, and more particularly, to a halogen bulb with a reflector that prevents a temperature rise of the reflector and that effectively reflects visible light emitted from the halogen bulb.

[0003]

[Prior Art]

 Conventionally, an electric bulb with a reflector in which a light bulb having a screw-in type of this type is incorporated is disclosed in Japanese Utility Model Publication No. 51-39412, and a light bulb having a simple base is incorporated in Japanese Utility Model Publication No. 53-142. It is disclosed in Japanese Patent Publication No.

In these cases, visible light or infrared rays emitted from the light bulb are reflected forward by this reflector. Further, the infrared rays also heat the sealed portion of the light bulb due to conduction and radiation from the glass bulb. Therefore, the temperature in the vicinity of this sealing portion becomes extremely high, and cracks in the glass bulb may occur.

Further, when the molybdenum introducing foil is embedded in the sealing portion, the introducing foil is oxidized to impair the hermetic sealing, and as a result, outside air enters to shorten the life of the light bulb. There is.

[0006]

[Problems to be solved by the device]

 In particular, in the case of a light bulb built into a reflector that has a visible light-transmitting infrared reflection film on the main part of its glass bulb, infrared rays emitted diagonally from the filament or directly to the bulb end. Is multi-reflected with the above-mentioned infrared reflecting film on the opposing wall surface or is directly transmitted from the valve end near the sealing part to the outside in the sealing part direction, so the infrared ray amount on the sealing part surface is remarkably high. More. Therefore, the temperature rise of the molybdenum-introduced foil becomes remarkable.

In this case, the temperature of the reflector also rises as in the above-mentioned sealing portion. Visible light emitted from the light bulb is transmitted from the bulb end near the sealing part to the outside in the sealing part direction and is reflected by the reflector.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a halogen bulb with a reflector that prevents the temperature of the reflector from rising and effectively reflects visible light emitted from the halogen bulb. To aim.

[0009]

[Device configuration]

[0010]

[Means for Solving the Problems]

 In order to achieve the above object, in the present application, a sealing portion formed by embedding a molybdenum introducing foil formed at one end of a tubular valve and connected to an inner conducting wire supporting a filament, and a sealing portion connected to this sealing portion. And a visible-light-transmitting infrared reflective film formed on the sealing-side curved portion, and a screw-type base that is attached to the sealing portion. And a reflector incorporating the halogen bulb.

[0011]

[Action]

 In the present invention, the infrared light radiated toward the sealing portion is reflected in the filament direction by the visible light transmitting infrared reflecting film formed on the sealing side curved portion, so that it is not exposed outside the sealing portion. It does not reach, and the molybdenum-introduced foil is not heated by radiation. Therefore, the screw-in type base and the reflector incorporating this halogen bulb will not be abnormally heated.

Further, the visible light radiated toward the sealing portion can be incident on the visible light transmitting infrared ray reflective film formed on the sealing side curved portion at a relatively small incident angle, and the transmitted visible light can be transmitted. In the wavelength range of, the visible light in the proper wavelength range is reflected by the reflector without any wavelength shift and is effectively projected. Therefore, there is no waste of reflected light.

[0013]

【Example】

 The invention of the present application will be described with reference to FIGS.

First, the molybdenum introducing foil (3), (4) connected to the inner conductors (4), (4) supporting the tungsten coil filament (5) at one end of the tubular bulb (1) made of transparent quartz glass. 3) is buried and a sealing part (2) is formed. Further, a sealing side curved portion (12) which is bent toward the outside is formed so as to be connected to the sealing portion (2).

Furthermore, a second visible light transmitting infrared reflecting film (7) is formed on the sealing side curved portion (12), and a first visible light transmitting infrared reflecting film (6) is formed continuously from this. ) Is formed into a tubular valve (1). A screw-type base (8) is attached to the sealing portion (2) to form a halogen bulb.

The halogen bulb is built in the reflector.

In this embodiment, no visible light transmitting infrared reflecting film is formed on the top end surface (13) of the bulb (1).

Further, as shown in FIG. 2, each of the visible light transmitting infrared reflecting films (6) and (7) has a high refractive index layer (6H) made of titanium oxide (TiO 2) or the like on the outer surface of the bulb (1). ) And a low refractive index layer (6 L) made of silica (SiO 2) etc. are alternately laminated in 7 to 9 layers, and when the light (R) emitted from the filament (5) is incident, this light (R) Most of the visible light (V) component of () is transmitted to the outside of the bulb (1), and the infrared (I) component is reflected to the filament (5) inside the bulb (1). In particular, the wavelength 0. 40% reflection of near infrared rays of 8 to 1.2μ.

Next, the function and effect of this halogen bulb with a reflector will be described.

First, most of the visible light (V1) of the light (R1) incident almost vertically from the filament (5) on the first visible light transmitting infrared reflecting film (6) is transmitted and radiated to the outside. The infrared rays (I1) are mostly reflected and returned to the filament (5), which contributes to the improvement of the heating rate of filaments.

In addition, most of the visible light (V2) of the light (R2) incident on the first visible light transmissive infrared reflective film (6) with a relatively small incident angle from the filament (5) is mostly. The infrared rays (I2) that are transmitted and radiated to the outside are reflected and returned to the filament (5) or do not return to the filament (5), but are repeatedly reflected to the curved portion (12) on the sealing side. There is something to reach. Since a second visible light transmitting / infrared reflecting film (7) is formed on the sealing side curved portion (12), the incident infrared ray (I2) is reflected and returned to the filament (5). It will not be returned to the object or filament (5). In this embodiment, since the visible light transmitting infrared reflecting film is not formed on the top end surface (13) of the bulb (1), the infrared ray (I2) may be radiated from this portion.

Further, the light (R3) emitted from the filament (5) near the sealing side curved portion (12) is incident on the second visible light transmitting infrared reflecting film (7) almost vertically, and Most of the visible light (V3) is transmitted and radiated to the outside, and is reflected by a reflector incorporated in this direction. The infrared rays (I3) are reflected and returned to the filament (5), and are emitted from the top end face (13) to the outside without returning.

Therefore, infrared rays do not enter the sealing portion (2) or the base (8) of the halogen light bulb and are not heated, and further, among the light emitted from the filament (5), the sealing side curved portion ( Since it enters the second visible light transmitting infrared reflecting film (7) formed in 12) at a relatively small incident angle, the wavelength range of the transmitted visible light does not cause a wavelength shift, and the visible light in an appropriate wavelength range. Can be obtained. And this visible light is reflected forward by the reflector, so that it is effectively projected. Therefore, there is no waste of reflected light.

That is, since the shape of the sealing side curved portion (12) is bent outward, the incident angle of visible light can be reduced. On the contrary, when the above shape approximates a straight line or is bent inward, the incident angle of visible light becomes large, and the visible light transmitting infrared reflecting film (7) that utilizes the interference of light is used. The optical path difference of the internal light deviates from the designed value, resulting in a wavelength shift. Therefore, in the present invention, the shape of the sealing side curved portion (12) is bent outward.

Further, since infrared rays are reflected inside the bulb (1) and the like, they do not penetrate to the outside, and the sealing portion (2) and the base (8) are not heated by radiation heat from the outside. Therefore, the temperature rise of the sealing part (2) and the screw-type base (8) can be prevented, the oxidation of the molybdenum introduction foil (3) is suppressed, and the airtightness of the sealing part (2) is maintained. can do.

Furthermore, since the screw of the screw-in type base (8) is generally made of metal, it is possible to suppress the temperature rise of this portion and prevent the temperature rise of the reflector.

[0027]

[Effect of the device]

 In the present application, a sealing portion formed by embedding a molybdenum introducing foil connected to an inner conductor supporting a filament formed at one end of a tubular valve, and a sealing portion formed by being connected to the sealing portion and bent outward. A halogen bulb comprising a sealing side curved portion, a visible light transmitting infrared reflecting film formed on the sealing side curved portion, and a screw-type base attached to the sealing portion. Since it is equipped with a reflector incorporating a light bulb, infrared rays radiated in the sealing portion direction are reflected in the filament direction by the visible light transmitting infrared reflecting film formed in the sealing side curved portion, The molybdenum-introduced foil will not be heated by radiation or the like without reaching the outside in the direction of the sealing portion. Therefore, it does not abnormally heat the screw-in type base and the reflector incorporating this halogen bulb.

Further, the visible light radiated toward the sealing portion can be incident on the visible light transmitting infrared ray reflective film formed on the sealing side curved portion at a relatively small incident angle, and the transmitted visible light can be transmitted. In the wavelength range of, the visible light in the proper wavelength range is reflected by the reflector without any wavelength shift and is effectively projected. Therefore, there is no waste of reflected light.

[Brief description of drawings]

FIG. 1 is a partially cutaway vertical sectional view of a halogen bulb according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part of a visible light transmitting infrared reflecting film.

[Explanation of symbols]

1 ... Valve, 2 ... Sealing part, 3 ... Molybdenum introduction foil, 4 ...
Inner conducting wire, 5 ... Filament, 6 ... First visible light transmitting infrared reflecting film, 7 ... Second visible light transmitting infrared reflecting film, 6H ...
High refractive index layer, 6L ... Low refractive index layer, 11 ... Valve side wall, 1
2 ... Sealing part curved part

Claims (1)

[Scope of utility model registration request] 1. A sealing portion formed by embedding a molybdenum-introducing foil formed at one end of a tubular valve and connected to an inner conductor for supporting a filament, and a sealing portion formed to be connected to the sealing portion toward the outside. A halogen bulb comprising a bent curved portion on the sealing side, a visible light transmitting / infrared reflecting film formed on the curved portion on the sealing side, and a screw-type base attached to the sealing portion, and the halogen bulb. A halogen light bulb with a reflector, comprising: a reflector incorporating a light bulb;