JP5193736B2 - Incandescent lamp emitter and discharge lamp electrode - Google Patents

Description

  The present invention relates to an electrode of a discharge lamp such as a fluorescent lamp serving as an illuminant of an incandescent lamp, a backlight of a liquid crystal display, and an illumination light source of OA equipment.

  The coil-type filament illuminator used in incandescent lamps has double coils and triple coils in order to obtain life and brightness from a single wire. This is difficult, and has a problem that the incandescent lamp is likely to be unlit due to disconnection due to vibration or shock due to poor earthquake resistance or shock resistance.

  In addition, the life and energy consumption of a discharge lamp such as a fluorescent lamp are determined by the amount of emitter (electron emitting material) held in the electrode. The application amount of the lamp is relatively reduced, the lamp life is shortened, and the energy consumption is increased.

  Therefore, as the electrode of the discharge lamp, an electrode in which a plurality of layers of filaments are wound around the outer periphery of the electrode shaft is adopted, and the falling off of the emitter filled between the roughly wound inner coil is caused by a tightly wound outer coil. Some have blocked and increased the retention of the emitter.

  Also, as a means for increasing the emitter, a refractory metal wire is wound around a coil and formed into a cylindrical shape or a sleeve shape whose inside is open toward the discharge space, and the emitter can be applied to the inner and outer surfaces of the coil filament. There is also a hollow-type electrode that can hold a larger amount of emitter than the electrode.

Further, there is a type in which a strip-shaped mesh knitted with a filament is wound around the tip of the electrode shaft a plurality of times to form an electrode head, and the electrode head made of the mesh is impregnated with an emitter to increase the amount.
Japanese Patent Laid-Open No. 9-17375 JP-A-6-52827 JP 200431296 A

  In the conventional electrode with the electrode shaft and the coil, the emitter is held by an inner and outer double-winding coil, and the coil is also a thin wire whose diameter is 1/100 mm, the inner coil is coarsely wound, and the outer coil is closely wound. Therefore, it is complicated to provide a coil interval larger than the average particle diameter of the emitter in part, so that a high level of skill is required for winding the coil, and emitter emission is also caused by a part of the outer coil interval. Therefore, it has problems such as being restricted.

  In addition, a hollow electrode formed by winding a coil in a cylindrical shape has a hollow inside, and the emitter inside the coil faces the space, so there is no restriction on electron emission, but the emitter is held in a different wire diameter. A thin wire is held by a coil wound inside and outside double, and each of the wires of the inner primary coil having a large wire diameter is closed by an outer secondary coil having a thin wire diameter to form a holding recess for the emitter. Therefore, the structure is complicated and there is a problem in yield.

  Furthermore, a belt-shaped mesh knitted with a filament is wound around the tip of the electrode shaft a plurality of times to form an electrode head, and the electrode head made by the mesh is impregnated with an emitter to increase the amount. In addition, if the number of turns is increased to increase the amount, it becomes difficult for electrons to be emitted from the emitter due to the overlap of the filament due to mesh misalignment, and the shape of the electrode is specified and the use is restricted. Have the following problems.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a new incandescent lamp light emitter and discharge lamp electrode which can be solved by the above-mentioned conventional technique, by forming the coil-shaped light emitter and the electrode with a net-like wire. is there.

The present invention according to the above object is a coil-shaped luminous body made of a refractory metal wire, and the refractory metal wire is composed of a mesh tubular wire in which filaments are knitted in a cylindrical shape with 8 to 24 knitting. The coiled wire is formed in a coil portion wound in a loop shape and the foot portions at both ends of the coil portion.

The present invention also relates to a coil-shaped electrode made of a refractory metal wire, the refractory metal wire comprising a mesh tubular wire in which filaments are knitted in a cylindrical shape with 8 to 24 knitting. It is formed by forming a coil portion in which a cylindrical wire is wound in a loop shape, and leg portions at both ends of the coil portion, and applying an emitter (electron emitting material) to the coil portion.

Further, the present invention is a hollow electrode made of a refractory metal wire, and the refractory metal wire is composed of a mesh tubular wire in which filaments are knitted in a cylindrical shape with 8 to 24 knitting. It is formed in a coil part obtained by winding a cylindrical wire into a cylindrical shape and a foot part at one end of the coil part, and an emitter (electron emitting material) is applied to the coil part.

  The coil portion of the present invention is hollow and has a core material at the foot portion, and the core material is formed by leaving the core wire at the time of knitting of the mesh tubular wire in the foot portion. Further, the core material is made of a fine metal wire fitted into the foot portion from the outside.

Further, the net-like tubular wire having the number of braids of 8 to 24 is composed of filament wire diameter: 0.015 to 0.2 mm , pitch: 0.05 to 2.0 mm, and inner diameter: 0.1 to 1.0 mm. That's it.

  In the above light emitter and electrode, the material wire is a hollow tube-like hollow body made of multifilaments, and the surface area of each filament is formed larger than that of monofilament. Can improve energy saving. Moreover, since it is based on a plurality of knitted bodies, it is excellent in earthquake resistance and impact resistance, and since all filaments are not disconnected simultaneously by a large vibration or impact, lamp non-lighting due to disconnection is prevented.

Further, in the electrode, the emitter application area is increased, and the yield of the emitter is improved by the overlapping portion of the filament , so that the amount of the emitter held in the coil portion increases even if the size is reduced. This prolongs the life of the discharge lamp, which is determined by the amount held by the emitter, and also reduces energy consumption, saving energy and reducing mercury in the discharge tube. Become.

Also, only by forming the coil part and the foot part, a loop-shaped coil-shaped or hollow-shaped electrode that is a normal form can be formed, and in any form, the coil part is hollow and opened to the inside and outside by a mesh, Since a space is secured around the filament, electrons are emitted uniformly by the emitter on the filament surface.

  Even if it is made up of a mesh-like wire, the strength of the foot is held by the core material, and it is always stable without being deformed by external pressure. Can be done.

  In the figure, reference numeral 1 denotes a net-like wire 1, as shown in FIGS. 1 and 2, a cylindrical net made of a multifilament in which a large number of filaments 1 a, 1 a of a refractory metal such as tungsten are alternately knitted obliquely. It consists of what was formed on the body.

  Although not shown in the figure, the mesh tubular wire 1 is formed by alternately placing filaments having a wire diameter of 0.015 to 0.2 mm around the core wire having a wire diameter of 0.1 to 1.0 mm, such as molybdenum. ~ 24 strokes (knit), knitted, and knitted into a cylindrical net with a pitch of meshes 1b, 1b of 2.0-0.05 mm. The core wire is dissolved and removed by chemical treatment from the net Removed. Therefore, since the inner diameter of the mesh tube wire 1 is determined by the wire diameter of the core wire, the thickness of the mesh tube wire 1 can be arbitrarily set by selecting a core wire having a different wire diameter.

  FIGS. 3 and 4 show an incandescent lamp light emitter 10 formed of the mesh tube wire 1, and a coil portion 11 in which the mesh tube wire 1 is wound in a loop shape and a coil axis. It consists of leg parts 12 and 12 formed at right angles and core members 13 and 13 inside thereof. The feet 12, 12 are bent at the base end from the left and right coil ends on both sides and formed perpendicular to the center of the coil. In some cases, as shown by the chain line, the feet 12 ', 12 are parallel to the coil axis. 12 'can also be formed.

  Although not shown in the drawings, the light-emitting body 10 has a loop-shaped wire wound around a secondary core wire (diameter: 0.4 to 30.0 mm) for coil forming together with the core wire in a quintuple manner. The coil portion 11 and the above-described foot portions 12 and 12 at both ends thereof are formed, and after forming, the core wire is dissolved and removed by chemical treatment to be finished into a hollow body. Therefore, since the inner diameter of the coil portion 11 is formed to be the same as the diameter of the secondary core wire (mandrel), the inner diameter can be arbitrarily set by selecting a secondary core wire having a different outer diameter. Incidentally, the lower limit of the dimension of the coil part 11 is about 0.2 mm in length (however, the number of coil turns is 2) and an outer diameter of 1.0 mm.

Further, the dissolution and removal of the core wire can leave the core wire in the foot portions 12 and 12 as a whole or only as the coil portion 11 and maintain the shape of the foot portion as the core materials 13 and 13. In the case of complete removal, although the figure is omitted in the legs 12 and 12 formed hollow together with the coil part 11, the shape can be maintained by inserting and fixing a core material made of a fine metal wire from the outside. . Even if the foot portion 12 is a mesh tube, the core member 13 becomes a stable foot portion that is hardly deformed by external pressure.

  5 and 6 show a coil-shaped electrode 20 of a discharge lamp formed by the mesh-shaped wire 1 and a coil portion in which the mesh-shaped wire 1 is wound in a loop shape in the same manner as the light emitter 10. 21, leg portions 22, 22 formed at right angles to the coil axis, core members 23, 23 inside thereof, and an emitter 24 applied to the coil portion 21.

  FIGS. 7A and 7B show a hollow electrode 30 of a discharge lamp formed by the mesh tube wire 1, a coil portion 31 in which the mesh tube wire 1 is wound in a cylindrical shape, and a coil portion 31. An emitter 24 is applied to the foot 32 formed at one end of the core, the core member 33 therein, and the coil 31. The foot 32 is formed long from the upper end of the coil portion 31 downward through the coil portion as shown in FIG. 1A, and is formed long from the lower end of the coil portion 31 downward as shown in FIG. Any of the cases can be employed. Incidentally, the lower limit of the dimension of the coil part 31 is about 0.4 mm in length (however, the number of coil turns is 4) and the outer diameter is about 1.0 mm.

The emitters 24 and 34 of the coil portions 21 and 31 in the electrodes 20 and 30 are normally used, and 0.1 to a large number of filaments 1a and 1a knitted in a net-like shape by a known means. It can apply | coat with the film thickness of -1.4m. The network tubular wire 1, a filament 1a every constant interval, there is overlapping portion of the 1a, the overlapping portion by better yield of emitters, emitter than with mono-filament I increase coupled with the surface area due to the multifilament The amount of retention increases. Further, since the coil portions 21 and 31 are hollow and opened to the inside and outside by the meshes 1b and 1b, and spaces are secured around the filaments 1a and 1a, electrons are uniformly emitted by the emitters 24 and 34 on the filament surface. The service life will be longer.

  Further, in the above-described mesh wire 1, triated tungsten filament mixed or coated with an electron emitting substance such as rhenium or thorium is knitted together with the tungsten filament, thereby making it possible to take measures against darkness occurring in the discharge tube. Become.

[Reticulated wire]
Material Tungsten Diameter: 0.02mm Number: 16 Dimensions Inner diameter: 0.2mm Number of strokes: 1 x 16
Pitch: 1.0mm

[Coil-shaped light emitter, electrode]
Coil part Length: 2.3 mm Outer diameter: 1.75 mm Number of turns: 5
Foot length: 3.5mm
[Hollow electrode]
Coil part Length: 2.0 mm Outer diameter: 1.75 mm Number of turns: 7
Foot length: 4.0mm

It is a partially expanded front view of the net-like cylindrical wire which comprises the light-emitting body and electrode concerning this invention. It is sectional drawing same as the above. It is a front view of the coil-shaped light-emitting body concerning this invention. It is a side view same as the above. It is a front view of the coil-shaped electrode concerning this invention. It is a fragmentary sectional view of a coil part same as the above. It is the front view and bottom view which cut and show a part of two aspects (A) and (B) of a hollow-shaped electrode.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Reticulated wire 1a Filament 1b Mesh 10 Coil-form light-emitting body 11 Coil part 12 Foot part 13 Core material 20 Coil-shaped electrode 21 Coil part 22 Foot part 23 Core material 24 Emitter 30 Hollow-shaped electrode 31 Coil part 32 Foot Part 33 Core material 34 Emitter

Claims (7)

A coil-shaped illuminant made of a refractory metal wire, and the refractory metal wire is composed of a mesh tubular wire in which filaments are knitted in a cylindrical shape with 8 to 24 knitting , and the mesh tubular wire is A light emitting body for an incandescent lamp, characterized in that it is formed on a coil portion wound in a loop shape and feet on both ends of the coil portion. A coil-shaped electrode made of a refractory metal wire, the refractory metal wire comprising a mesh tubular wire in which the number of knitting is 8 to 24 and the filaments are knitted in a tubular shape, and the mesh tubular wire is looped An electrode of a discharge lamp, which is formed on a coil part wound in a shape and a foot part at both ends of the coil part, and an emitter (electron emitting material) is applied to the coil part. A hollow-type electrode made of a refractory metal wire, the refractory metal wire comprising a net-like tubular wire in which filaments are knitted in a cylinder shape with a knitting number of 8 to 24 , and the net-like tubular wire is cylindrical. An electrode of a discharge lamp, which is formed on a coil part wound in a shape and a foot part at one end of the coil part, and an emitter (electron emitting material) is applied to the coil part. The coil portion is hollow and has a core material in the foot portion, and the core material is formed by leaving the core wire at the time of the braided net of the net-like tubular wire in the foot portion. 4. The light emitter or electrode according to any one of 3 above. 4. The light emitting device according to claim 1, wherein the coil portion is hollow and has a core material in a foot portion, and the core material is formed of a thin metal wire fitted into the foot portion from the outside. Body or electrode. The electrode according to claim 2 or 3, wherein the mesh tubular wire is formed by knitting a filament of tungsten or tungsten and triated tungsten into a tubular shape. The net-like tubular wire having the number of knittings of 8 to 24 is composed of a filament wire diameter: 0.015 to 0.2 mm , a pitch: 0.05 to 2.0 mm, and an inner diameter: 0.1 to 1.0 mm. The heating element or electrode according to any one of claims 1, 2, 3, and 6.

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