JPH0543459U - Incandescent light bulb - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an incandescent light bulb having a simple structure, easy to manufacture, and excellent in earthquake resistance and light distribution. [Structure] The valve 1 is a normal one end seal type having a pinch seal portion 11 formed at one end and an exhaust pipe residual portion 12 at the other end, and a holding wire 5 fixed by a pair of glass pieces 41, 42.
The diameter of the wire is 0.4-0.6 mm, its ends are directly embedded in the pinch seal part, and both ends of the filament 2 are connected to the inner leads 31, 32 fixed with glass pieces and wound around the holding wire. Hold the filament with the anchored wire 51 that is secured once.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an incandescent light bulb, and more particularly to an incandescent light bulb for general lighting, which is excellent in earthquake resistance and light distribution.

[0002]

[Prior Art]

 Incandescent light bulbs for general lighting are widely used in all situations, but depending on the situations in which they are used, filaments are required to have quake resistance and have excellent light distribution. 2. Description of the Related Art Conventionally, as shown in FIG. 2, there is known an incandescent light bulb having excellent earthquake resistance of a filament. To explain this, pinch seal portions 11 are formed at both ends of the bulb 1, and a pair of glass pieces 41, 42 are arranged in the vicinity of each pinch seal portion 11. Then, the anchor wire 51 is wound around the holding wire 5 fixed by the glass pieces 41, 42, the holding piece 5 fixed by the glass piece 41 or the glass piece 42, and the filament 2 is held by the anchor wire 51. There is. Since the holding wire 5 has a large wire diameter, it cannot be directly embedded in the pinch seal portion 11 and is held by one of the pinch seal portions 11 via the coil 53. Further, since the pinch seal portions 11 are formed at both ends of the valve 1, the exhaust pipe remaining portion 12 is located in the middle portion of the valve 1.

[0003]

[Problems to be solved by the device]

 Such an incandescent light bulb has a large number of parts and has a complicated structure, and since it requires pinch seal portions formed at both ends of the bulb, it takes time to manufacture. Therefore, it is limited to large incandescent lamps with power consumption of several KW. Moreover, since the remaining portion of the exhaust pipe is located in the middle part of the valve, there is a problem that the light distribution is deteriorated when used in combination with a mirror.

Therefore, an object of the present invention is to provide an incandescent light bulb which has a simple structure, is easy to manufacture, and is excellent in earthquake resistance and light distribution.

[0005]

[Means for Solving the Problems]

 In order to achieve such an object, the present invention provides an incandescent bulb in which a filament is arranged along a tube axis of a valve having a pinch seal portion at one end and an exhaust pipe residual portion at the other end. The first glass piece arranged on the pinch seal portion side and the second glass piece arranged on the remaining portion of the exhaust pipe, and the first glass piece and the second glass piece are fixed to both ends, respectively, and one end is a pinch seal. A pair of holding wires with a wire diameter of 0.4 to 0.6 mm embedded in the section, connected to one end side of the filament and held by the first glass piece and the second glass piece, and the tip of the holding wire remaining in the exhaust pipe. Inserted long first inner lead, short second inner lead held by the second glass piece and connected to the other end side of the filament, and anchor anchored to the holding wire to hold the filament. Composed of lines and.

[0006]

[Action]

 Since the diameter of the holding wire that holds the first glass piece and the second glass piece is 0.4 to 0.6 mm, it can be embedded directly in the pinch seal part and can be easily welded to each glass piece. And can be easily manufactured. Moreover, since the retaining wire is directly embedded in the pinch seal part, it has excellent earthquake resistance. In addition, since the incandescent lamp is a one-end-sealed type incandescent lamp that has the exhaust pipe residual portion at the tip, the exhaust pipe residual portion does not hinder the light distribution, and good light distribution can be obtained.

[0007]

【Example】

 The present invention will be described in detail below with reference to the embodiments shown in the drawings. Figure 1 shows a halogen incandescent lamp for general lighting with a power consumption of 85 W. A bulb-type incandescent bulb 1 made of quartz glass has a pinch seal 11 at one end and an exhaust pipe residue 12 at the other end. It is a light bulb. A first glass piece 41 is provided on the pinch seal portion 11 side in the bulb 1, and a second glass piece 42 is provided on the exhaust pipe remaining portion 12 side. That is, the first glass piece 41 and the second glass piece 42 are arranged so as to face each other.

The pair of holding wires 5 and 5 are made of Molybden's wire having a wire diameter in the range of 0.4 to 0.6 mm, for example, 0.5 mm, and both ends of the first glass piece 41 and the second glass piece 42. It is welded and fixed to. The ends of the holding lines 5 and 5 are directly embedded in the pinch seal portion 11. A pair of molybdenum metal foils 33 made of molybdenum are also embedded in the pinch seal part 11.One end of the metal foil 33 is welded to the metal foil 33 and the external lead 34 extends to the outside, and the other end is also welded to the metal foil 33. The first inner lead 31 and the second inner lead 32 extend into the valve 1. The first inner lead 31 is long and is fixed by the first glass piece 41 and the second glass piece 42, and its tip is inserted into the exhaust tube remaining portion 12. On the other hand, the second inner lead 32 is short and is fixed only to the first glass piece 41.

The filament 2 is formed by winding a tungsten wire having a wire diameter of 0.005 mmφ around a double coil, and both ends thereof are connected to the first internal lead 31 and the second internal lead 32, respectively. The anchor wire 51 has one end wound around and fixed to the holding wire 5, and the other end holds the filament 2.

Next, incandescent light bulbs with different diameters of the holding wire 5 were actually manufactured, and the seismic resistance of the filament 2 and the adhesion of the holding wire 5 to the glass pieces 41, 42 and the pinch seal portion 11 were investigated. The results are shown in Table 1.

[0011]

[Table 1]

As can be seen from the above, when the diameter of the holding wire is 0.7 mmφ, when the holding wire 5 is embedded in the glass pieces 41, 42 and the pinch seal portion 11, a crack is generated in the glass. The adhesion was poor. When the diameter of the holding wire was 0.4, 0.5, and 0.6 mm, both seismic resistance and adhesion were good, and a lighting life of 1500 hours or more could be obtained. On the other hand, when the diameter of the holding wire was 0.3 mm, the adhesion was extremely good but the seismic resistance was poor, and the filament was cut after lighting for about 1000 hours. That is, the diameter of the holding wire needs to be 0.4 to 0.6 mm from the viewpoint of earthquake resistance and adhesion.

Since the holding wire 5 has a diameter of 0.4 to 0.6 mm as described above, it can be directly embedded in the pinch seal portion 11 and can be easily welded to each glass piece 41, 42. it can . Therefore, it can be easily manufactured and has excellent earthquake resistance. Further, since the incandescent light bulb is a normal one end-sealed incandescent lamp having the remaining exhaust pipe at the tip, good light distribution can be obtained even when used in combination with a mirror.

[0014]

[Effect of the device]

 As described above, the incandescent light bulb of the present invention is a normal one-end sealed type, and the holding wire fixed by a pair of glass pieces has a wire diameter of 0.4 to 0.6 mm and its end portion. Was embedded directly in the pinch seal part, both ends of the filament were connected to the internal lead fixed with glass pieces, and the filament was held by the anchor wire wound around the holding wire. It is an incandescent lamp that is simple, easy to manufacture, and has excellent earthquake resistance and light distribution.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Valve 11 Pinch seal part 12 Exhaust pipe remainder 2 Filament 31 1st internal lead 32 2nd internal lead 33 Metal foil 34 External lead 41 1st glass piece 42 2nd glass piece 5 Holding wire 51 Anchor wire

Claims (1)

[Scope of utility model registration request] 1. An incandescent light bulb having a pinch seal portion at one end and an exhaust pipe residual portion at the other end, in which a filament is arranged along the tube axis of the bulb, and the filament is arranged on the pinch seal portion side in the bulb. A first glass piece and a second glass piece arranged on the remaining side of the exhaust pipe;
A pair of holding wires each having a wire diameter of 0.4 to 0.6 mm fixed to both ends of the first glass piece and the second glass piece and having one end buried in the pinch seal portion, and one end side of the filament. A long first internal lead which is connected and held by the first glass piece and the second glass piece, and whose tip is inserted into the remaining portion of the exhaust pipe, and the other end side of the filament which is held by the second glass piece. An incandescent light bulb, comprising: a short second inner lead connected to the holding wire; and an anchor wire wound around and fixed to the holding wire to hold the filament.