JPH0259584B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention mainly provides a supporter for stably supporting a double-ended double-coil filament in a bulb without impairing its light-emitting characteristics. Concerning double coil filament.

[Prior art and its problems] In general, as a double coil filament equipped with a supporter, as shown in FIGS. 6 to 8, a double coil filament 2 enclosed in a double-ended valve 1 is It is supported by a ring-shaped supporter 3 at an appropriate location and fixed at the center within the bulb 1.

The supporter 3 is formed into a ring shape with one end 3a inserted between the pitches of the double coil filament 2 and the other end inscribed in the bulb 1.

However, in this case, since the supporter 3 is inserted between the pitches of the light emitting part of the double coil filament 2, not only the light emitting characteristics of the double coil filament 2 are impaired, but also the constant of the double coil filament 2 due to its structure. The filament is unstable in its fixed position, and there is a risk that even a slight impact may cause the filament to shift its position.If the winding diameter of the double coil part is increased, the instability will further increase. Therefore, there is a limit to the reduction in the coil length of the filament with a predetermined voltage, and there is also a limit to the miniaturization of the valve 1 in which the double coil filament 2 is sealed.

[Means for Solving the Problems] The present invention provides a pair of double coil filaments 6, 6 in which the primary coil at the end of the double coil filament 6 is extended outside the light emitting portion to form a coil support portion 6a. and the coil support portion 6 of the pair of double coil filaments 6, 6 toward the center.
A pair of coil support parts 10 inserted into a, 6a
By providing a double coil filament equipped with a supporter, the above-mentioned conventional problems can be solved. The purpose of this invention is to stably fix the filament in a fixed position without impairing the light emitting characteristics of the filament, reduce the coil length as much as possible, and downsize the bulb.

[Example] Hereinafter, an example of a double coil filament equipped with a supporter according to the present invention will be described based on the drawings.

FIG. 5 shows a halogen light bulb similar to the conventional example shown in FIG. 6 as an example of the implementation of the present invention, and shows a bulb 4 made of a quartz tube with both ends sealed to form closed portions 4a, 4a. A sealed cavity 5 is formed inside, and an inert gas and a trace amount of a halogen substance are sealed within this sealed cavity 5.

A double coil filament 6 extends longitudinally within this sealed cavity 5, and both ends of this filament 6 are connected to internal leads 7, 7, which are connected to the valve 4. Molybdenum foils 8, 8 embedded in the closed parts 4a, 4a of
It is connected to external lead wires 9, 9 via.

Further, the filament 6 is fixed to the center of the sealed cavity 5 by a pair of ring-shaped supporters 10, 10 inscribed in the sealed cavity 5.

As a support mechanism for the double coil filament 6 by the supporter 10, those shown in detail in FIGS. 1 to 5 are used.

That is, as shown in FIG. 4, the pair of double coil filaments 6, 6 are connected to the supporter 1
The primary coil at the end to be supported by the double coil filament 6 is extended out of the light emitting part of each double coil filament 6, 6 to form the coil support parts 6a, 6a, and the supporter 10 is extended as shown in FIG. ,
A wire rod is formed into a ring shape large enough to be inscribed in the sealed space 5 of the valve 4, and each free end thereof extends toward the center of the ring shape to form a coil support portion 10a, 10.
a is formed. Then, as shown in FIGS. 1 and 2, the coil support parts 10a, 10a of the supporter 10 are press-fitted into the coil support parts 6a, 6a of the pair of double coil filaments 6, 6,
A pair of double coil filaments 6, 6 are fixed to the center of the supporter 10 by the supporter 10.

Although a support mechanism for a pair of double coil filaments 6, 6 has been described here, it goes without saying that more than one pair can be supported in the same manner as described above. Furthermore, although a single ring of the supporter 10 is shown, it is obvious that the supporter 10 can be made of a double ring or more, or that it can be applied not only to halogen light bulbs but also to general incandescent light bulbs.

[Effect] As described above, in the double coil filament equipped with the supporter according to the present invention, the coil support portion of the supporter is inserted and connected to the coil support portion of the primary coil that extends outside the light emitting portion of the double coil. This not only does not impair the luminous properties of the double-coil filament, but also makes it easy to assemble and improves work efficiency. At the same time, the double-coil filament can be stably fixed in a fixed position on the bulb, making it easier to physically There is no risk of misalignment due to shock, and the double coil filament can be stably fixed regardless of the winding diameter of the double coil filament. For example, by increasing the winding diameter, the coil length can be reduced, and the valve can be made shorter and smaller, and if the valve is made of expensive quartz, the cost can be reduced. There are other effects.

[Brief explanation of drawings]

1 to 5 show an embodiment of a double coil filament equipped with a supporter according to the present invention, in which FIG. 1 is an overall front view, FIG. 2 is a side view thereof, and FIG. 3 is a supporter. 4 is a front view of the double coil filament before assembly, FIG. 5 is a front view of a halogen lamp with a portion cut away and omitted, and FIG. 6 is a front view of a conventional example with a portion cut away. FIG. 7 is a front view of a double coil filament equipped with a conventional supporter, and FIG. 8 is a side view thereof. 4...Valve, 6...Double coil filament, 6a, 10a...Coil support portion, 10...Supporter.

Claims (1)

[Claims] 1. The primary coil at the end of the double-coil filament is inserted into a pair of double-coil filaments extending outside the light emitting part to form a coil support part, and into the coil support part of the pair of double-coil filaments in the center direction. What is claimed is: 1. A double coil filament equipped with a supporter comprising a ring-shaped supporter inscribed in a bulb, and a ring-shaped supporter in which a pair of coil support portions are extended.