JPS609051A - Bulb - 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 The present invention relates to an infrared light bulb with less uneven illumination.

[Technical background of the invention and its problems] A halogen light bulb for a copying machine is made by sealing a neck-shaped pulp with filaments connected in series through short-circuit wires. This light bulb emits both visible light and infrared rays, so there is a risk of overheating the inside of the device.

In addition, since the filaments are arranged at a distance, there is a drawback that illuminance unevenness occurs on the document surface.In response to this, the applicant has previously proposed that at least one of the inner and outer surfaces of the bulb is We proposed a bulb with a reflective film and a diffuser film formed on the outer surface of the bulb. Since this type emits less infrared radiation and scattered light, the illuminance distribution is uniform. When the filament is misaligned with the tube axis, the reflected infrared rays curl back and heat the filament C, which helps improve efficiency.

However, if this bulb is turned on continuously, the infrared rays will not be radiated to the outside and will eventually be absorbed by the bulb, causing the bulb temperature to rise significantly and causing overheating inside the small first unit.Also,゛This 5 turns twice, lights up for 3 seconds, 2
If you use it with the light flashing like 0 seconds off, the bulb will be turned off before the bulb temperature rises enough, so the bulb TM j! 'f
l is low and the halogen cycle is not sufficiently 1-yt,
Hayano) J There is a risk of blackening.

In addition, even if a halogen electric moon for lighting is used, in which one filament is sealed in a small bulb and the original reflector is fitted with silk, at least one of the inner and outer surfaces of the bulb f2 visible reflection outside H reflection. If Hα is provided and a two-layer optical film ν is provided outside the bulb, there will be less infrared radiation and there will be no non-uniform illumination distribution due to optical image formation i2 of the filament.

However, if this product is turned on indoors, there is a risk of overheating since the bulb is 1/4 inch in size, and if it is left unlit outside, there is a risk of overcooling.

[Objective of the Invention] It is an object of the present invention to provide a light bulb that emits less infrared radiation, has a uniform illuminance distribution, and is free from overheating or overcooling.

[Four main points of the invention] A visible light transmitting infrared reflective film is formed on at least one of the inner and outer surfaces of a transparent bulb sealed with a filament, and the bulb is surrounded by a diffuse light transmitting outer tube, whereby an infrared I
tjI is returned to the inside of the pulp, and visible "C" is returned to the outer tube to scatter it.

[Embodiments of the invention] The details of the invention will be explained with reference to the illustrated embodiment.

The figure shows a halogen light bulb for a copying machine to which the present invention is applied. Visible light ♂ (regressive external ray reflective film formed on at least one side)
<8+, (81 is a sealing part formed by crushing and sealing both ends of the valve (1), (4), (4) are these restraining parts +81
．． Molybdenum-introduced foil embedded in FB+, (
5L (5) is the lead-in wire % (6) connected to these lead-in foils (4) + (4) and introduced into the valve (1).
), (6) The rivers are connected in series through short-circuit wires (7), (7)... and introduced between uJ (5), L5) (-
Centerline 5 of mounted valve (1); located value number of tungsten filament F s (8), (8) is the sealing Q1% of valve (1); supported annular support % (9
) are these supports (81, (81) supporting a diffused light-transmitting outer tube surrounding the sides of the bulb (1), <1 (
Reference numeral 11 is a terminal connected to the introduction foil (4) I (4) l knee and attached to both sides of the stopper part (81, fil). Then, a V" argon and a A halogen of -W>' is sealed together with the active gas.

The above-mentioned infrared ray anti-sprout film (2) is made by alternately layering 7 to 9 layers of 4 oxide Jh and a metal oxide layer with a low optical refractive index such as silica on gold with a high optical refractive index such as titanium oxide. in,
Due to light interference, it has the property of transmitting visible light well and reflecting infrared light well.

1. The support (8) is fixed to the outer surface of the sealing part (8), and has two types: vented type where outside air can flow freely ≦ 2, closed type where outside air cannot flow through, closed type where outside air can flow through, or You can control the amount C
There is a type III control type that can be controlled in two ways, each of which has a special IQ effect, which will be described later.

The above-mentioned tube (9) is made of transparent glass, has a straight tube shape, and has a light-diffusing uneven surface C2 formed on at least one surface of both the inner and outer concave surfaces by hydrofluoric acid treatment, honing, or other means. . A valve (1) and two M cores are provided.

Next (2. IU
+ Follow Il:j 1D, then filament ((ri, (
6) ... generates heat and emits a large amount of infrared rays along with visible light. Among these lights, infrared rays are reflected by an infrared reflective film (2)
It is reflected by the filament (6), (6)...C2 returns and heats it, which helps improve efficiency. In addition, visible light passes through the infrared reflecting film (2) and enters the outer tube (9) (2), where it is diffused and radiated to the outside world. Therefore, this light bulb emits less infrared light, so it There is no risk of overheating or burning out the document surface, and since the radiation is scattered, the filament (6'), <6')
The illuminance distribution is uniform even though they are spaced apart.

Furthermore, in this light bulb, infrared rays are not emitted outside the bulb (1), so if the bulb (1) is lit continuously, there is a risk that the bulb (1) will overheat.
1) Since it is well cooled, it will not overheat even in a small copying machine. In addition, if one bulb of frost is used in a flashing cycle such as 3 seconds on and 20 seconds off, there is a risk of overcooling as the C2 light is turned off and cooled down before the temperature of the bulb (1) rises sufficiently. In this case, if the support (8) is of a closed type, it prevents the valve (υ) from cooling, so there is no risk of the valve becoming overcooled.

Furthermore, if the support (8) is set to control type C2, the temperature of the bulb (1) can be adjusted by adjusting the ventilation of the support (8) by 1i17+l according to the purpose of use of the light bulb, the dot method, and cold sales. Optimum C can be adjusted.

Figure 2 shows a comparison of this thick illuminance distribution with a conventional light bulb that does not have an infrared reflecting film and a diffuser bulb. In the figure, the horizontal axis is the position along the valve (1), and the vertical axis is 1114 (<41.gt), which is taken as a relative value, and the curve (A) (shown by the diagonal j).
The illuminance L (distribution curve, CB) of the light bulb of this embodiment (shown by broken glands) shows that of the conventional light bulb, respectively. From this figure, it can be seen that the illuminance distribution of the light bulb of this example is uniform!
I can understand it.

Tsuki ζ2, 11!1 WJ 1jLD move! Let's talk about l. This item is a Haloken 'jl'i for projecting light that has two C agents such as store light uA in combination with a reflector, a ball, and a small size.
A small filament is attached to the center line of the T-shaped pulp.
M's', and at least one of the inner and outer surfaces of the bulb (a second light-transmitting regressive line-repelling film is formed, and the outer circumference of the second bulb is surrounded by a diffused light-transmitting outer tube similar to the above-mentioned embodiment). It is.

This device also emits less infrared radiation, similar to the embodiment described above, has high efficiency, and has a uniform illuminance distribution because there is no formation of an optical image of the filament by the refractor 1 unit.

Furthermore, 52, this light bulb (even if the outside tube is ventilated, there is no risk of the bulb overheating even in an environment where the tube temperature is high, and if it is a sealed type, it will not overcool even if it is lit outdoors) Furthermore, the C2 control type C2 shifter can optimize the pulp humidity even if the ambient temperature or lighting conditions change.

In both of the above-mentioned embodiments, at least one of the inner and outer surfaces of the glass outer tube is formed with a light-diffusing uneven surface C-, but the present invention is not limited to this S1. The outer tube may be made of light diffusing glass such as opalescent glass or crystallized glass.
The outer tube may be made of infrared absorbing glass to provide light scattering properties. Furthermore (2. The outer tube is made of transparent synthetic resin '4>
At least one of the inner and outer surfaces of the outer tube may be provided with a prism cut to provide light diffusion properties, or the outer tube may be made of a diffused light-transmitting synthetic resin. In this case, the ventilation inside the outer tube may be It is necessary to maintain a good C2 to prevent heat loss to the outer tube.

It should be noted that the present invention is not limited to the t'J halogen tIE bulb, but can also be applied to ordinary bulbs, and similar effects can be obtained. The filament then does not have to be in the center of the bulb.

[Effects of the Invention] At least one of the inner and outer surfaces of the transparent pulp sealed with the I, &:J filament is provided with 1-visible light transmittance, infrared reflection +1p-, and diffused around the bulb. Since it is surrounded by a translucent outer tube, there is an advantage that infrared radiation is small and the illumination is uniform.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of one embodiment of the frost sphere of the present invention, and FIG. 2 is a graph showing that the illuminance distribution of the sphere is uniform according to the present embodiment.

Claims (3)

[Claims] (1) A transparent bulb mounted with a filament, and at least one of the inner and outer surfaces of the bulb (-formed r5
J optical transmission, d) Infrared reflection film and the above bulb 1
H1 has diffused light transmission V1: outer eyebrow and q! J
A light bulb with a j sign. (2) Outside' (No. 1, consisting of 1% + 1-, characterized in that at least one of the inside and outside surfaces is formed with a light-sensitive uneven surface. 'F i!tζ51
The light bulb described in paragraph 1 of the eaves. (3) The outer layer 1'j i; 1j, ui+ at 1 is characterized in that it is made of a 41-9.
1+i+ is made of a diffusively permeable yC substance.
Light bulb as described in section.