JPH0528682Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an incandescent light bulb with a reflector suitable for general lighting.

[Technology background]

For example, incandescent light bulbs with reflectors are used in show cases where products are displayed in department stores and the like in order to suitably illuminate the products.

An incandescent light bulb with a reflector placed inside a show case requires soft light to avoid dazzling the viewer, so dimples or multiple flat surfaces are formed on the inner surface of the concave reflector to provide reflected light. is spreading.

Furthermore, in order to give a favorable impression to the viewer,
Some of the light leaking from the back side of the concave reflector is also made into soft diffused light. Specifically, a concave reflective mirror is created by providing a light-transmitting reflective film on the inner surface of a concave light-transmitting glass substrate, and providing minute irregularities for diffusing transmitted light on the outer surface of the glass substrate by so-called texturing. It consists of

In the production of a translucent glass substrate, molding using a mold is preferred because it is simple and inexpensive.

[The problem that the idea attempts to solve]

Therefore, in order to attach an incandescent light bulb that has a seal at one end, a cylindrical seal receiver is formed at the top of the concave reflector to receive the seal of the incandescent light bulb. If fine irregularities for diffusing transmitted light are formed on the outer surface of the substrate by texturing, a problem arises in which molding means using a mold cannot be applied in the production of a translucent glass substrate. This is because if minute irregularities are formed on the outer surface of the seal receiving part by texturing, the seal receiving part cannot be extracted from the mold.

Therefore, the inventor of the present invention abandoned the idea of forming minute irregularities by texturing on the outer surface of the seal receiving part, and fixed the seal part of the incandescent light bulb by attaching it to the seal receiving part of the glass base using adhesive. Occasionally,
An attempt was made to fill the adhesive excessively to prevent light from passing through to the back side of the seal receiving section.

However, even with such means, it is still not sufficient, and there is a risk that the light transmitted to the back side of the seal receiving portion may dazzle the viewer.

The present invention was developed based on the above-mentioned circumstances, and its purpose is to sufficiently soften the light transmitted from the seal receiving part of the concave reflector to the back side thereof, and to simplify the construction of the concave reflector. An object of the present invention is to provide an incandescent light bulb with a reflector that can be manufactured by a suitable means.

[Means to solve the problem]

In order to achieve the above object, the present invention provides an incandescent light bulb with a reflector comprising an incandescent light bulb having a seal portion formed at one end and a concave reflector, wherein the concave reflector is located at the seal portion of the incandescent light bulb. An interference film that mainly transmits infrared rays and reflects visible light is provided on the inner surface of a concave translucent glass substrate having a cylindrical seal receiving portion formed on the top thereof,
The glass base has minute irregularities for diffusing transmitted light on the outer surface other than the seal receiving part, and the transmitted light extends in the axial direction of the concave reflecting mirror on the inner or outer surface of the cylindrical seal receiving part. It is characterized by having linear unevenness for diffusion.

[Effect]

Since minute irregularities for diffusing transmitted light are formed on the outer surface of the concave reflecting mirror, the light transmitted to the back side of the concave reflecting mirror is sufficiently softened by the minute irregularities.

Moreover, since the linear unevenness for diffusing transmitted light is formed on the inner or outer surface of the seal receiving part, the light passing through the seal receiving part is also sufficiently softened by the linear unevenness.

Since the linear unevenness of the seal receiving part extends in the axial direction of the concave reflector, when molding the translucent glass substrate with a mold, the translucent glass substrate can be molded in the axial direction. It can be easily pulled out from the mold by pulling it.

[Specific configuration of the invention]

The configuration of the present invention will be specifically explained below.

FIG. 1 is an explanatory diagram showing an example of an incandescent light bulb with a reflector according to the present invention. In the figure, 10 is an incandescent light bulb, and 20 is a concave reflecting mirror.

The incandescent light bulb 10 is made of, for example, a halogen incandescent light bulb, and has a seal portion 11 formed at one end by, for example, heat and pressure bonding. Two external lead rods 12A and 12B protrude outward from this seal portion 11. Although not shown, the external lead rods 12A and 12B are inserted into, for example, a nickel pipe, and their tips are connected by, for example, plasma welding.

In the concave reflecting mirror 20, 21 is a concave translucent glass substrate, 22 is an interference film that mainly transmits infrared rays and reflects visible light, and 30 is a seal receiving part.

The translucent glass base 21 is made of, for example, Pyrex glass (borosilicate glass), and has a cylindrical seal receiving portion 3 projecting rearwardly at its top.
0 is formed. The seal portion 11 of the incandescent light bulb 10 is inserted into the seal portion receiving portion 30 and fixed with an adhesive 60.

An interference film 22 made of, for example, a vapor-deposited film of aluminum or the like is provided on the inner surface of the glass base 21 except for the seal receiving part 30. In order to soften the reflected light, a large number of dimples or flat surfaces (not shown) for light diffusion are previously formed on the inner surface of the glass base 21 except for the seal receiving portion 30.

Then, on the outer surface of the transparent glass substrate 21 except for the seal portion receiving portion 30, minute irregularities 40 for diffusing transmitted light are formed by so-called texturing. This texturing can be performed by, for example, mechanically scratching the bottom surface of the mold or chemically treating the bottom surface.

For example, on the inner surface of the cylindrical seal receiving portion 30,
As shown in FIG. 2, a large number of linear asperities 50 for diffusing transmitted light are formed extending in the axial direction of the concave reflecting mirror 20 (in the direction perpendicular to the plane of the paper in the figure).
The linear unevenness 50 can be formed, for example, by using a mold having such a shape.
The linear unevenness 50 in this example corresponds to the seal portion receiving portion 30.
It is made up of a large number of grooves formed on the inner surface.

According to the incandescent light bulb with a reflector configured as described above, the outer surface of the concave reflector 20 has minute irregularities 4 for diffusing transmitted light.
0 is formed, the light transmitted to the back side of the concave reflecting mirror is sufficiently softened by the minute irregularities 40, and the inner surface of the seal receiving part 30 is also provided with a linear line for diffusing the transmitted light. Since the unevenness 50 is formed, the light passing through the seal receiving section 30 is also sufficiently softened by the linear unevenness 50. Therefore, when the incandescent light bulb with a reflector configured as described above is used as an illumination light source for a product placed in a show case, for example, it can give a favorable impression without dazzling the viewer.

Since the linear unevenness 50 formed on the inner surface of the seal portion receiving portion 30 extends in the axial direction of the concave reflecting mirror 20, it is possible to extract the seal portion receiving portion 30 from the mold. It can be easily manufactured by molding the transparent glass substrate 21 with a mold.

In the above, the linear unevenness 50 may be constituted by a large number of linear protrusions formed on the inner surface of the seal receiving portion 30, as shown in FIG.

Further, the linear unevenness 50 may be formed on the outer surface of the seal receiving portion 30, as shown in FIG.

[Effect of idea]

As explained above, according to the present invention, the light transmitted through the interference film and the glass base can be sufficiently diffused and softened by the minute irregularities for diffusing transmitted light formed on the outer surface of the glass base, and Since linear irregularities are formed on the inner or outer surface of the seal receiving part, the light transmitted from the seal receiving part of the concave reflector to the back side can be sufficiently diffused and soft. Can make a good impression on people.

Since the linear unevenness formed on the seal receiving part extends in the axial direction of the concave reflector,
By molding with a mold, the light-transmitting glass substrate having the linear irregularities can be easily and inexpensively manufactured.

[Brief explanation of drawings]

Fig. 1 is an explanatory sectional view showing an example of an incandescent light bulb with a reflector according to the present invention, Fig. 2 is a sectional view taken along the - line shown in Fig. 1, and Figs. It is an explanatory sectional view showing another example of a concrete form. 10...Incandescent light bulb, 11...Seal part, 12
A, 12B...External lead rod, 20...Concave reflecting mirror, 21...Translucent glass base, 22...Interference film, 30...Seal receiving part, 40...Minute size for diffusing transmitted light Irregularities, 50... Linear asperities for diffusing transmitted light, 60... Adhesive.

Claims (1)

[Claims for Utility Model Registration] An incandescent lamp with a reflector comprising an incandescent lamp with a seal formed at one end and a concave reflector, wherein the concave reflector receives the seal of the incandescent lamp. An interference film that mainly transmits infrared rays and reflects visible light is provided on the inner surface of a concave translucent glass substrate having a cylindrical seal receiving portion formed on the top thereof, and the seal of the glass substrate The outer surface of the cylindrical seal receiving part has minute irregularities for diffusing transmitted light, and the inner or outer surface of the cylindrical seal receiving part has linear irregularities for diffusing transmitted light extending in the axial direction of the concave reflecting mirror. An incandescent light bulb with a reflector characterized by having.