JPH09306435A - Incandescent lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an incandescent lamp wherein effective utilization of an infrared ray relating to a direction along an introducing direction of a lead wire or a direction similar to that can be realized, thus, saving of power consumption and extending of a life in the incandescent lamp can be also realized. SOLUTION: In this incandescent lamp, one end 13a, 14a of a plurality of lead wires 13, 14 is guided in a glass bulb 12, a filament 15 is connection held between each one end 13a, 14a, an infrared reflecting film permeated with visible light to reflect an infrared ray of a lighting beam, outgoing from the filament 15, is provided in an outer surface of the glass bulb 12, a reflection member 16 reflecting infrared ray to a side of the filament 15 is provided in one end 13a, 14a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention introduces one end of each of a plurality of introducing wires into a glass tube, and a filament is connected and held between the respective ends, and the filament is emitted to the outer surface of the glass tube. The present invention relates to an incandescent light bulb provided with an infrared reflection film that transmits visible light and reflects infrared light in the illuminated luminous flux.

[0002]

2. Description of the Related Art Conventionally, for example, as shown in FIGS. 6 (A), (B), 7 (A), and (B), one end 2a of a plurality of lead-in wires 2 and 3 is introduced into a glass tube 1. 3a is introduced respectively,
An incandescent lamp 5 in which a filament 4 is connected and held between the ends 2a and 3a is known.

An infrared reflection film (not shown) is applied to the surface of the glass tube 1. The infrared reflection film has a property of transmitting visible light and reflecting infrared light of the illumination light flux emitted from the filament 4.

The higher the temperature of filament 4, the better the luminous efficiency. Therefore, a part of the infrared light included in the illumination light flux accompanying the light emission of the filament 4 is reflected by the infrared reflection film to the filament 4, and the heat generated by the infrared reflection film can improve the luminous efficiency of the filament 4.

[0005]

By the way, in the incandescent lamp 5 configured as described above, although the light emission efficiency is improved by the infrared reflection film, the infrared reflection film is emitted from the filament 4. Introductory lines 2, 3 of the luminous flux
Although it is effective for the infrared light emitted in the direction orthogonal to the introduction direction of, the infrared ray in the direction along the introduction direction of the introduction lines 2 and 3 or a direction similar thereto cannot be effectively used.

The present invention has been made in view of the above circumstances, and it is possible to effectively use infrared rays in a direction along the introduction direction of the introduction line or in a direction similar to the introduction direction, thus saving the power consumption of the incandescent light bulb. It is an object of the present invention to provide an incandescent light bulb that can realize a long life and a long life.

[0007]

In order to achieve the object, the invention described in claim 1 is such that one end of each of a plurality of introducing wires is introduced into a glass bulb, and a filament is connected and held between the respective one ends. In the incandescent light bulb provided with an infrared reflection film that transmits visible light and reflects infrared light in the illumination light flux emitted from the filament on the outer surface of the glass bulb, the infrared ray is provided on the filament side. The gist is that a reflecting member that reflects light is provided at the one end.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of an incandescent light bulb of the present invention will be described with reference to the drawings.

1A and 1B, an incandescent light bulb 1 is shown.
1 is a glass tube 12 and one end 13 in the glass tube 12.
a, 14a is introduced to the introduction lines 13 and 14, and one end 13
filament 15 connected between a and 14a, and one end 1
3a and 14a, and a reflecting member 16 provided on the 3a and 14a.

On the outer surface of the glass tube 12, a large number of low refractive index layers and high refractive index layers are alternately laminated (for example, 20 to 20).
Infrared reflection film 17 having 60 layers) is provided. The infrared reflection film 17 has a property of transmitting visible light and reflecting infrared light of the illumination light flux emitted from the filament 15. Regarding the detailed constitution (components etc.) and function (halogen cycle) of the infrared reflection film 17, it is disclosed in Japanese Patent Laid-Open No.
Since it is disclosed in Japanese Patent Publication No. 296783, the description thereof will be omitted.

The reflecting member 16 is located closer to the base side than the filament 15 and has an infrared reflecting film (not shown) on its surface. In addition, the reflecting member 16 is shown in FIG.
As shown in (A) and (B), pieces 16a and 16b formed by dividing the glass into two pieces are closely joined to each other to form a reflector shape with the filament 15 as a focal point. Furthermore, the lead-in line 13,
Semicircular recesses 16c, 16d, 1 for holding 14
6e and 16f are formed.

When the incandescent lamp 11 is manufactured with the above structure, as shown in FIGS. 3 (A) to 3 (E), first, the reflecting member 16 is attached to the introduction lines 13 and 14, and then the filament 15 is attached. The infrared ray reflection film 17 is applied to the outer surface of the glass tube 11 by connecting the ends 13a and 14a and degassing the glass tube 11 before molding.

The mounting of the reflecting member 16 is shown in FIG.
As shown in (D), the recesses 16c and the recesses 16d and the recesses 16e and the recesses 1 are aligned with the introduction lines 13 and 14, respectively.
6f are opposed to each other, and the opposing mating sides are melted by a burner or the like (see the arrow in the figure) to join the pieces 16a and 16b.

At this time, the reflecting member 16 and the lead-in wire 1 after welding
3 and 14 are joined together with molten glass in a state where there is no gap, and the remaining molten glass forms a reservoir 16g on the back surface opposite to the reflection surface side, and infrared filament 15
Set so that the reflection to the side is not obstructed.

Further, since the pieces 16a and 16b are formed by molding glass, not only can the thickness and shape of the pieces be made as precise as designed, but also the design can be changed and the shape can be set. It can also be applied.

Further, the filament 15 is attached to the glass tube 1.
When provided at the center of 1, the pieces 16a, 16b of the target shape
Therefore, it is possible to exert excellent effects in terms of costs such as molding dies and storage management.

When the incandescent light bulb 11 having such a structure is installed in a vehicle lamp or the like (not shown), visible light in the illumination light flux accompanying the light emission of the filament 15 passes through the glass tube 12 and the reflecting member 16. Is irradiated as it is as an illumination light flux, and a part of the infrared light is applied to the filament 1 by the infrared reflection film 17 applied to the outer peripheral surface of the glass tube 12.
5 and the other part of the infrared light is reflected by the reflection member 16
Is reflected by the filament 15.

Each infrared light reflected to the filament 15 heats the filament 15 due to its wavelength characteristic, and this heating improves the light emitting characteristic of the filament 15 (smooth halogen cycle) to realize an increase in the amount of light. Incandescent light bulb 1
It is possible to realize a long service life of 1.

Although the reflection member 16 is provided on the base side (bottom side) of the introduction wires 13 and 14 with respect to the filament 15, it may be provided on the tip side of the filament 15 in the same manner.

However, since the top shape of the glass tube 12 is basically dome-shaped, the infrared light beam emitted from the filament 15 to the top side of the glass tube 12 is the infrared light beam. Filament 15 relatively efficiently
Although the infrared light flux reflected toward the bottom side was effectively used, the infrared light flux toward the bottom side of the glass tube 12 was comparatively wasted. Therefore, in the present embodiment, the red light flux toward the bottom side is red. It is configured to make effective use of the external light flux.

[0021]

As described above, in the incandescent light bulb of the present invention, since the reflecting member for reflecting infrared light on the filament side is provided at one end of the introduction line, the introduction direction of the introduction line is improved. It is possible to effectively use the infrared rays in the direction along the line or in a similar direction, and thus it is possible to save the power consumption of the incandescent light bulb and extend the life thereof.

[Brief description of drawings]

FIG. 1 shows an incandescent light bulb according to Embodiment 1 of the present invention, (A) is a side view of the incandescent light bulb, and (B) is a plan view of the incandescent light bulb.

FIG. 2A is also an exploded perspective view of a reflecting member,
(B) is an exploded front view of the reflecting member.

3 (A) to 3 (E) are explanatory views showing the manufacturing process of the incandescent light bulb in time series.

4 (A) to 4 (D) are explanatory views showing a process of attaching a reflecting member in a manufacturing process of an incandescent light bulb in time series.

FIG. 5 shows an incandescent light bulb according to Embodiment 2 of the present invention, (A) is a side view of the incandescent light bulb, and (B) is a plan view of the incandescent light bulb.

FIG. 6 shows a conventional incandescent light bulb, (A) is a side view of the incandescent light bulb, and (B) is a plan view of the incandescent light bulb.

FIG. 7 shows another conventional incandescent lamp, (A) is a side view of the incandescent lamp, and (B) is a plan view of the incandescent lamp.

[Explanation of symbols]

 11 ... Incandescent light bulb 12 ... Glass tube 13 ... Introducing wire 13a ... One end 14 ... Introducing wire 14a ... One end 15 ... Filament 16 ... Reflecting member 17 ... Infrared reflecting film

Claims (2)

[Claims] 1. An end of a plurality of introduction lines is introduced into a glass tube, a filament is connected and held between the ends, and an illumination light beam emitted from the filament is emitted to an outer surface of the glass tube. An incandescent light bulb provided with an infrared reflection film that transmits visible light and reflects infrared light, wherein the filament side has a reflecting member that reflects infrared light provided at the one end. light bulb. 2. The reflection member has a reflector shape which is located closer to the base side of the one end than the filament and is expanded toward the filament side to focus the filament. The incandescent light bulb described in 1.