JPH0733366Y2 - Incandescent light bulb for lighting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an incandescent light bulb for lighting, and more particularly to an incandescent light bulb having a planar type filament coil and suitably used for stage lighting and studio lighting.

[Prior Art and Its Problems] Currently, a large number of types of luminaires are used for stage lighting and studio lighting, and the usage conditions thereof are wide-ranging. In recent years, not only simple lighting but also stage lighting, studio lighting, and the like have been particularly desired to realize high-speed changes in artistic expressions accompanied by changes in lighting conditions.

Conventionally, when such blinking is repeated,
Lighting fixtures have been used which comprise flash discharge lamps called flash lamps or strobe lamps.

However, in the case of illumination by a flash discharge lamp, since the light emission time is instantaneous, only a very short time of instantaneous illumination is performed. For example, continuous illumination for a certain period of time such as 1 second or longer is not possible. This is impossible, and since the illumination light from the flash discharge lamp is generally bluish, there is a problem that the illumination effect in a natural color tone state cannot be obtained as it is.

On the other hand, with an incandescent light bulb, it can be turned on continuously and the color tone is natural, but there is a delay in the rise and fall of the emitted light amount due to the turning on and off operation, and the response There is a problem that it is not possible to perform good lighting and extinguishing, that is, so-called "sharpening" lighting and extinguishing. And this tendency becomes remarkable in an incandescent light bulb having a large electric power, which has a so-called planar type filament coil (for example, JIS standard C-13, C-13D) in which a single coil is planar.

In addition, incandescent light bulbs with a planar type filament coil that have a high rated power consumption cannot be increased in distance between the coil segments due to the limitation of the size of the encapsulation, and the lamp is lit. There is a problem in that adjacent coil segments are likely to come into contact with each other due to deformation or the like that occurs, and a short circuit easily occurs.

[Purpose of device]

The present invention has been made based on the above circumstances, and the rise and fall of the emitted light amount due to lighting and extinguishing operations are fast, and there is no short circuit in the filament coil. An object is to provide a suitable incandescent lamp for lighting.

[Constitution of device]

The incandescent lamp for illumination according to the present invention is an incandescent lamp for illumination comprising a package and a planar type filament coil, wherein the filament coil has a plurality of tungsten filaments arranged in a straight line in a cross section. It is characterized in that both sides of the ribbon are coiled so as to become the inner surface and the outer surface of the coil by a ribbon-shaped filament material that extends in parallel in the state of being aligned.

[Action]

In the incandescent lamp of the present invention, the filament coil is made of a filament material composed of a bundle of a plurality of tungsten filaments, and the diameter of each tungsten filament is small. Therefore, the heat capacity per unit length of the filament material is the same. It is much smaller than the filament material consisting of a single tungsten element wire to obtain the output of, and as a result, the rising and falling of the emitted light amount accompanying the lighting and extinguishing operations are fast and the lighting has good response. It can be turned off.

The filament material has a ribbon shape in which a plurality of tungsten filaments are arranged in a line along a straight line in a cross section and extend in parallel without being twisted with each other, and the filament coil is a ribbon filament. By the material, since both sides of the ribbon are coiled so as to be the inner surface and the outer surface of the coil,
The coil diameter of the filament coil can be made very small. Therefore, the coil segments formed are thin, and as a result, the distance between the coil segments in the envelope having the same inner diameter can be increased, so that no short circuit occurs between the coil segments during lighting. .

〔Example〕

 An embodiment of the present invention will be described below.

In the incandescent lamp according to the embodiment of the present invention, as shown in FIG.
It comprises a planar type filament coil 20 composed of a coil segment S of a book. This filament coil
As shown in FIG. 2 in a partially enlarged manner, 20 is a plurality of tungsten filaments W each having a small diameter (four in this example),
A filament material F is used which is a bundle of filaments arranged in a ribbon shape so as not to be twisted with each other but to extend in parallel, and the filament material F is coiled to be formed. That is, the filament material F
As shown in FIG. 3, in the cross section, all the tungsten wires W are arranged in a line along the straight line X.

Each coil segment S is continuous via the flying part 21,
In each flying part 21, the anchor 33 fixed to the glass piece 40
The filament coil 20 is held in the envelope 10 by the engagement of the tips of the. 11 is a pinch seal part, 12 is an exhaust pipe remaining part, 30 is an internal lead, 31 is a connecting rod, 32 is a fixed rod,
50 is a ceramic base and 60 is a lead pin.

According to such an incandescent lamp for illumination, since the filament coil 20 is formed of the filament material F including a bundle of a plurality of tungsten filaments W, the diameter of each tungsten filament W is small and the filament material concerned. Since the heat capacity per unit length in F is small, and therefore the temperature of the filament coil 20 rises and falls in accordance with the lighting and extinguishing operations, the rising and falling of the amount of emitted light is fast and the lighting and extinguishing are highly responsive. It can be performed.

This is because in an incandescent light bulb, regardless of whether the filament material is made of a single tungsten element wire or a plurality of tungsten element wires, if the surface area of the entire filament material is made equal, the same amount of emitted light is obtained. Therefore, according to the present invention, in order to obtain the same amount of emitted light as in the case of a single tungsten wire, the diameter of each tungsten wire W constituting the filament material F is very large. This is because it is sufficient to use a small one.

Moreover, since the diameter of each tungsten wire W is small in this way, as shown in FIG. 2, by coiling the ribbon-shaped filament material F so that both surfaces of the ribbon are the inner and outer surfaces of the coil, A filament coil having a very small coil diameter R can be formed. Therefore, since the coil segment S formed is thin, the distance L between the coil segments S can be increased in the envelope 10 having the same inner diameter, and thus the coil segments S are short-circuited during lighting. Does not occur.

An incandescent lamp having the following specifications was manufactured according to the configuration shown in FIG.

Rated power consumption: 100V, 3KW Tungsten wire diameter: 0.29mm Number of tungsten wires: 4 Coil pitch P (Fig. 2): 1.66mm Distance between coil segments L: 2.3mm And this incandescent bulb is lit And, when the rise and fall times of the emitted light amount due to the turning-off operation are measured, they are 1.1 seconds and 1.3 seconds, respectively,
No short circuit occurred in the filament coil during lighting.

On the other hand, by using a filament material made of a single tungsten element wire, an incandescent light bulb of the same rated power consumption having a filament coil of a similar form is manufactured in accordance with the following specifications, and this incandescent light bulb is similarly turned on and off. When the rise time and the fall time of the emitted light amount were measured, they were 2.6 seconds and 2.7 seconds, respectively, which were very long.

Rated power consumption: 100V, 3KW Tungsten wire diameter: 0.67mm Number of tungsten wires: 1 Coil pitch: 0.97mm Distance between coil segments: 1.6mm In place of the ribbon-shaped filament material F that composes the present invention Then, when a filament material formed by twisting a plurality of strands such as a twisted wire is used, the distance between the formed coil segments becomes shorter, so that a short circuit easily occurs during lighting.

[Effect of device]

As is clear from the above description, according to the incandescent lamp for illumination of the present invention, since the filament coil is formed of the filament material composed of a bundle of a plurality of tungsten element wires, the amount of light emitted by the lighting and extinguishing operations is increased. Rises and falls rapidly, and since the filament coil is coiled with a ribbon-shaped filament material so that both surfaces of the ribbon are the inner surface and the outer surface of the coil, the filament coil is formed between the coil segments. It is possible to provide an incandescent lamp for lighting suitable for stage lighting and studio lighting without causing a short circuit.

[Brief description of drawings]

FIG. 1 is a front view for explaining an incandescent lamp for lighting of the present invention, and FIG.
FIG. 3 is an enlarged view of the main part of the filament coil, and FIG. 3 is an enlarged cross-sectional view of the filament material. 10 …… Enclosure, 11 …… Pinch seal part 12 …… Exhaust pipe remainder, 20 …… Filament coil 21 …… Flying part, 30 …… Internal lead 31 …… Connecting rod, 32 …… Fixing rod 33 …… Anchor , 40 …… Glass piece 50 …… Ceramic base 60 …… Lead pin, W …… Tungsten wire F …… Filament material, S …… Coil segment

Front Page Continuation (72) Toyoyuki Nakano, 2-2-1, Jinnan, Shibuya-ku, Tokyo Within the Japan Broadcasting Corporation (72) Toshiyuki Takeda 4--7, Shimbashi, Minato-ku, Tokyo Arties Co., Ltd. (56) References Actual Development Sho 53-141789 (JP, U) Actual Public Sho 43-20604 (JP, Y1) Actual Public Sho 53-51115 (JP, Y2)

Claims (1)

[Scope of utility model registration request] 1. An incandescent lamp for illumination, comprising an envelope and a planar-type filament coil, wherein the filament coil has a plurality of tungsten filaments arranged in a line along a straight line in a cross section. An incandescent lamp for illumination, characterized in that both sides of the ribbon are coiled by ribbon-shaped filament materials that extend in parallel in a state so as to become an inner surface and an outer surface of the coil.