JP4313594B2 - Lamp electrode, lamp electrode manufacturing method, arc tube, arc tube manufacturing method, and lamp - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lamp electrode in which a filament coil is supported by a pair of lead wires, a lamp electrode manufacturing method, an arc tube, an arc tube manufacturing method, and a lamp.
[0002]
[Prior art]
In the age of energy saving, lamps with high lamp efficiency and long life, particularly fluorescent lamps, are attracting attention. Such a fluorescent lamp includes an arc tube in which an electrode having a filament coil is sealed at the end of a curved or straight glass tube. In recent years, due to the demand for compact fluorescent lamps, the diameter of the glass tube constituting the arc tube tends to be reduced.
[0003]
FIG. 9 is a diagram for explaining a process of sealing a conventional electrode to the end of the glass tube. A part of the glass tube is used so that the state of the electrode inserted from the end of the glass tube can be understood. Notched. FIG. 9 shows a state in which the exhaust pipe used for exhausting the glass tube is also sealed at the end of the glass tube.
As shown in FIG. 5A, the electrode 900 has a pair of lead wires 911 and 912 that support the filament coil 910 held by a melted and solidified glass bead 913 (so-called bead mount method).
[0004]
As a method for holding the filament coil in the electrode for the fluorescent lamp, there is a stem mount method in addition to the above-described bead mount method. This stem mount type electrode is applied to glass tubes with a large tube diameter because of its complicated structure. In recent years, the bead mount has a simpler structure than the stem mount method and can be applied to glass tubes with a small tube diameter. Many types of electrodes are used.
[0005]
Next, a process for sealing the electrode 900 and the exhaust pipe 930 to the end 921 of the glass tube 920 will be described.
First, the lead wires 911 and 912 of the electrode 900 and the exhaust pipe 930 are held by the holding jig 940. In the holding jig 940, holding holes 942, 943, 944 are formed corresponding to the lead wires 911, 912 and the exhaust pipe 930. The vertical alignment of the pair of lead wires 911, 912 and the exhaust pipe 930 is performed by inserting them to the bottoms of the holding holes 942, 943, 944.
[0006]
Next, in a state where the lead wires 911, 912 and the exhaust pipe 930 are held by the holding tool 940, the end portion 921 of the glass tube 920 is extrapolated to them. Then, as shown in FIG. 9 (b), the end 921 of the glass tube 920 is softened by heating, for example, with a burner 950, and the softened end 921 of the glass tube 920 is pressed against the exhaust pipe 930 side. (Patent Document 1).
[0007]
[Patent Document 1]
JP-A-6-14000
[0008]
[Problems to be solved by the invention]
However, when the conventional electrode 900 is sealed to the end portion 921 of the glass tube 920, the filament coil 910 or the lead wire 912 contacts the inner peripheral surface of the glass tube 920 as shown in FIG. , “Coil touch”).
[0009]
In particular, this problem of coil touch did not occur when the tube diameter of the glass tube was large, but it was not negligible due to the reduction in the diameter of the glass tube due to the recent downsizing of the arc tube (the incidence rate of coil touch is 15). %) Came to occur.
When a coil touch occurs, the life of the arc tube is shortened. This is done by oxidizing the electron emitting material applied to the filament coil by passing a current through the lead wire when the arc tube is evacuated and heating the filament coil. Escape from the glass tube in contact with the coil touch. For this reason, the temperature of the filament coil does not rise sufficiently, the electron emitting material is insufficiently oxidized, and impurities remain in the filament coil.
[0010]
The present invention has been made in view of the above-described problems, and is used for a lamp electrode and a lamp that can be sealed to a glass tube having a small tube diameter without contacting a filament coil or the like with the inner peripheral surface of the glass tube. An object is to provide an electrode manufacturing method, an arc tube, an arc tube manufacturing method, and a lamp.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, a lamp electrode according to the present invention comprises a filament coil, a pair of lead wires for supporting the filament coil, a tubular glass body, and a fixing member made of a glass material, The pair of lead wires is formed by connecting the filament coil to the glass body. Located on the side close to the filament coil In a state separated from one end, it is arranged on the outer periphery of the glass body along a direction parallel to the axis of the glass body, and is the outer periphery of the glass body at a position near one end of the glass body. By fixing member In a state where one end of the glass body projects from one end of the fixing member It is characterized by being fused.
[0012]
The “columnar shape” here is a concept including a hollow columnar shape and a solid columnar shape. According to this configuration, the pair of lead wires is fixed to the outer periphery of the glass body. For this reason, when sealing this electrode to the end of the glass tube, for example, the portion where the lead wire is fixed to the glass body and the end of the glass tube are fused, or the lead wire is attached to the glass body. If the glass body and the end of the glass tube are fused so that the fixed part is located in the glass tube, the filament coil is hardly affected by the fusion, and the filament coil is not affected by the glass tube. There is less contact with the inner circumference.
[0013]
In the method for manufacturing a lamp electrode according to the present invention, the pair of lead wires for supporting the filament coil is an outer periphery of a tubular glass body, Located on the side close to the filament coil Near one end In a state where one end of the glass body projects from one end of the fixing member A method of manufacturing a fixed lamp electrode, wherein the lead wire is disposed in a direction parallel to an outer periphery of the glass body and parallel to an axis of the glass body, and an outer periphery of the glass body And a fixing step of fixing the pair of lead wires by fixing a fixing member made of a glass material at the position on the outer periphery of the glass body. For this reason, when sealing an electrode to a glass tube, an electrode with which a filament coil cannot touch the edge part of a glass tube easily can be manufactured.
[0014]
The arc tube according to the present invention is an arc tube in which an electrode is sealed at an end of a glass tube,
The electrode includes a filament coil, a pair of lead wires supported by the filament coil, a tubular glass body, and an annular fixing member made of a glass material, and the pair of lead wires includes the filament coil. Of the glass body Located on the side close to the filament coil In a state of being separated from one end, the glass body is turned along a direction parallel to the axis of the glass body, and the fixing member is positioned on the outer periphery of the glass body and in the vicinity of one end of the glass body. One end of the glass body is fused in a state of protruding from one end of the fixing member, and a portion of the glass body fixing the lead wire and an end of the glass tube or the lead wire The glass body and the end of the glass tube are positioned so that the fixed part is located within the end of the glass tube. It is characterized by being fused.
[0015]
According to this configuration, the pair of lead wires is fixed to the outer periphery of the glass body, and the lead wire is fixed to the glass body and the end of the glass tube is fused, or the lead wire is attached to the glass body. The glass body and the end of the glass tube are fused so that the fixed portion is located in the glass tube. For this reason, if the glass body is held when the electrode is sealed to the end of the glass tube, the filament coil is less likely to come into contact with the inner periphery of the glass tube.
[0016]
Also, an arc tube in which an electrode is sealed at the end of a glass tube, the electrode comprising a filament coil, a pair of lead wires suspended from the filament coil, a tubular glass body, and a glass material And the pair of lead wires are wound along a direction parallel to the axis of the glass body in a state where the filament coil is separated from one end of the glass body. The outer periphery of the glass body, Located on the side close to the filament coil By the fixing member in the vicinity of one end In a state where one end of the glass body projects from the fixing member It is sealed, and the end of the glass tube is fused to the fixing member.
[0017]
According to this configuration, the pair of lead wires are fixed to the outer periphery of the glass body by the fixing member, and the outer periphery of the fixing member and the inner periphery of the end portion of the glass tube are fused. For this reason, if the glass body is held when the electrode is sealed to the end of the glass tube, the filament coil is less likely to come into contact with the inner periphery of the glass tube.
A method of manufacturing an arc tube according to the present invention includes a fixing member made of an annular glass material in a state in which a pair of lead wires that support a filament coil are arranged around the outer periphery of a tubular glass body along the axial direction. The outer periphery of the glass body and the glass body Located on the side close to the filament coil Near one end In a state where one end of the glass body projects from the fixing member An arc tube manufacturing method in which a fused electrode is sealed to an end of a glass tube, the holding step of holding the glass body of the electrode, and the filament coil in the end of the glass tube It is characterized by including a disposing step of disposing and a sealing step of sealing the end of the disposed glass tube and the fixing member.
[0018]
For this reason, when sealing an electrode to a glass tube, the arc tube in which the filament coil of an electrode cannot contact the edge part of a glass tube can be manufactured, and the manufacturing yield of an arc tube can be improved.
The lamp according to the present invention includes the arc tube described above. For this reason, the filament coil of the electrode is less likely to contact the glass tube. Thereby, the oxidation treatment of the filament coil can be performed at a predetermined temperature. Therefore, it is possible to prevent the lamp from being shortened.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
<Embodiment>
Hereinafter, an embodiment in which the present invention is applied to a bulb-type fluorescent lamp will be described with reference to FIGS.
1. About configuration
(A) Structure of bulb-type fluorescent lamp
As shown in FIG. 1, the bulb-type fluorescent lamp 100 is housed in the holding body 200, an arc tube 110 in which a glass tube 120 is curved in a double spiral shape, a holding body 200 that holds the arc tube 110. And an electronic ballast 300 for lighting the arc tube 110 and a globe 400 covering the arc tube 110.
[0020]
The holding body 200 includes a cylindrical holding member 210 in which an end for receiving the end portion of the glass tube 120 is formed in the end wall, and a cone-shaped case 250 that is fitted on the peripheral wall 220 of the holding member 210. It consists of. A screw-type base 380, for example, E17 type, is attached to a cylindrical portion (lower end portion in FIG. 1) having a small opening in the case 250.
[0021]
The electronic ballast 300 is a series inverter system composed of a plurality of electrical components such as capacitors 310, 330, and 340, a choke coil 320, and the like. A substrate 360 on which these electrical components are mounted is attached to the holding member 210. ing.
Like the incandescent light bulb, the globe 400 is made of a glass material having excellent decorativeness, and has a so-called A-type shape. Here, the A-type is used as the shape of the globe 400, but it is not limited to this shape. Moreover, it is not necessary to provide the glove.
[0022]
The globe 400 is attached by inserting an end 405 on the opening side of the globe 400 between the circumferential wall 220 of the holding member 210 and the circumferential wall of the case 250 to which the globe 400 is fitted. The glove 400 is fixed using an adhesive 420 filled between the holding member 210 and the case 250.
The inner peripheral surface of the top portion 406 of the globe 400 is thermally coupled to the convex portion 126 at the top portion of the arc tube 110 via a heat conductive medium 410, specifically, a silicon resin. In the present specification, the “top” refers to a tip portion in the direction in which the arc tube 110 extends from the holder 200 with reference to the portion where the arc tube 110 is held by the holder 200.
[0023]
(B) Arc tube
As shown in FIG. 2, the arc tube 110 includes a folded portion 121 formed by folding a glass tube at its substantially center, and both sides of the folded portion 121 to its ends 124 and 125 in the B direction with the swivel axis A as the center. It has a double spiral shape composed of two swivel portions 122 and 123 swung in the same manner. A direction parallel to the turning axis A is hereinafter referred to as a “turning axis direction”. For the glass tube 120, for example, soft glass made of strontium barium silicate glass is used, and its cross-sectional shape is substantially circular.
[0024]
A rare earth phosphor 140 is applied to the inner surface of the glass tube 120. This phosphor 140 is, for example, red (Y ₂ O _Three : Eu), green (LaPO _Four : Ce, Tb) and blue (BaMg) ₂ Al ₁₆ O ₂₇ : Eu, Mn) three types of light emission are used.
Electrodes 130 to be described later are sealed at both ends 124 and 125 of the glass tube 120. In addition, about 3 mg of mercury is enclosed in the glass tube 120, for example, a mixed gas of argon and neon (Ar: 75%, Ne: 25%) is, for example, 600 Pa as a buffer gas. It is enclosed with. The buffer gas may not be a mixed gas of argon and neon. For example, only argon may be used.
[0025]
As shown in FIGS. 2 and 3, the electrode 130 is made of a tungsten filament coil 131, a pair of lead wires 132 and 133 for holding (holding the filament coil 131 in an erected state), and a glass material. A thin tube 134 (glass body of the present invention) and an annular glass ring 135 (fixing member of the present invention) are provided, and a pair of lead wires 132 and 133 are arranged so that the filament coil 131 is parallel to the axial center from the end face of the thin tube 134. It is arranged along the axial direction (longitudinal direction) of the thin tube 134 so as to be spaced apart in a proper direction, and is fixed to the outer periphery of the thin tube 134 by a glass ring 135.
[0026]
In FIG. 3, the filament coil 131 is on the axial center of the thin tube 134, but when the electrode 130 is inserted into the end portions 124 and 125 of the glass tube 120, the end portions 124 and 125 of the glass tube 120 are inserted. The lead wires 132 and 133 that support the filament coil 131 are curved along the shape.
The filament coil 131 is a so-called triple wound coil in which the number of turns of the secondary coil is one and the total length is 3.7 mm. The filament coil 131 is filled with an electron emitting material mainly composed of BaO—CaO—SrO. For the lead wires 132 and 133, for example, an alloy of iron, nickel, and chromium is used.
[0027]
As the narrow tube 134, a glass tube having a circular cross section is used. By making this thin tube 134 into a tubular shape, it can be used as an exhaust tube when the inside of the glass tube 120 is evacuated or when mercury, buffer gas or the like is sealed. As shown in FIG. 2, the tip of the thin tube 134 outside the glass tube 120 (the end located outside the glass tube) is evacuated from the glass tube 120 and further filled with mercury and buffer gas. Sealed by a chip-off method.
[0028]
The glass ring 135 has a circular cross-section that is the same as the cross-sectional shape of the thin tube 134, and the inner diameter corresponds to the outer diameter of the thin tube 134, and the outer diameter corresponds to the inner diameter of the glass tube 120. Yes.
The thin tube 134 and the glass ring 135 are made of soft glass, which is the same material as the glass tube 120 constituting the arc tube 110.
[0029]
2. Manufacturing method of arc tube
(A) Electrode manufacturing method
A method for manufacturing the electrode 130 having the above configuration will be described with reference to FIGS.
First, a pair of lead wires 132 and 133 and a thin tube 134 are prepared. As shown in FIG. 4A, the pair of lead wires 132 and 133 are in direct contact with the outer periphery of the thin tube 134 in the axial direction. In this state, these are held by the holding jig 150.
[0030]
The holding jig 150 has a holding hole 152 corresponding to the thin tube 134, and holding grooves 153 and 154 corresponding to the pair of lead wires 132 and 133 facing both sides of the holding hole 152. ing. The vertical alignment between the pair of lead wires 132 and 133 and the narrow tube 134 is performed by inserting them into the bottom of the holding hole 152 and the holding grooves 153 and 154.
[0031]
The depth of the holding hole 152 is such that the distance L1 between the upper end surface of the thin tube 134 and the upper surface of the holding jig 150 is 8 mm, and the depth of the holding grooves 153 and 154 is a pair of lead wires 132 and 133. The distance L2 between the upper end of each and the upper surface of the holding jig 150 is set to 20 mm.
Next, as shown in FIG. 4B, the glass ring 135 is extrapolated from above to the pair of lead wires 132 and 133 and the thin tube 134 held by the holding jig 150, and the lower surface of the glass ring 135 is held. When abutting against the upper surface of the jig 150, the glass ring 135 is heated from the outer periphery using a burner 155, as shown in FIG.
[0032]
The glass ring 135 is melted and contracted by this heating, and the inner periphery of the glass ring 135 and the outer periphery of the thin tube 134 are integrated, and the lead wires 123 and 133 are sealed between the glass ring 135 and the thin tube 134.
Finally, as shown in FIG. 4D, a predetermined position in the pair of lead wires 132 and 133 extending upward from the upper end of the thin tube 134, for example, a position where the distance L3 from the upper end of the thin tube 135 is 9 mm. After the filament coil 131 is laid over, the lead wires 132 and 133 above the filament coil 131 are folded back, and the portions are crimped to support the filament coil 131. The electrode 130 is manufactured by the above process.
[0033]
In the electrode 130 manufactured by the above method, since the pair of lead wires 132 and 133 that support the filament coil 131 are fixed to the outer periphery of the thin tube 134 by the glass ring 135, the thin tube 134 is handled when the electrode 130 is handled. The operability can be improved as compared with the conventional bead mount type electrode 900.
[0034]
Moreover, since the manufacturing method of said electrode 130 can use ready-made goods (machined goods) for the thin tube 134 and the glass ring 135, it is hard to produce the malfunction that a glass ring cannot be extrapolated to a thin tube, for example, and it is efficient. The electrode 130 can be manufactured.
Further, when the lead wires 132 and 133 are sealed to the outer periphery of the thin tube 134, the glass ring 135 having an inner diameter corresponding to the outer diameter of the thin tube 134 is used because the melting / shrinkage of the glass ring 135 is used. For example, the lead wires 132 and 133 can be easily hermetically sealed to the narrow tube 134 simply by heating the glass ring 135.
[0035]
(B) Sealing method of electrode to glass tube end
A process of sealing the electrode 130 manufactured by the above manufacturing method to the end portion 124 of the glass tube 120 will be described with reference to FIG. Here, the case where the electrode 130 is sealed to the end portion 124 of the glass tube 120 will be described, but the same applies to the case where the electrode 130 is sealed to the end portion 125 of the glass tube 120.
[0036]
First, as shown in FIG. 5A, the electrode 130 is set and held on a holding jig 160. A holding hole 161 is formed in the holding jig 160 so as to hold the electrode 130 (specifically, the narrow tube 134) vertically. The size of the holding hole 161 is such that the glass ring 135 does not enter, and the lower surface of the glass ring 135 abuts on the upper surface of the holding jig 160, so that the electrode 130 is inserted into the glass tube 120. The amount is prescribed.
[0037]
Next, as shown in FIG. 5A, the end 124 of the glass tube 120 is extrapolated from above to the electrode 130 held by the holding jig 160, and the edge on the end 124 side of the glass tube 120 is When abutting against the upper surface of the holding jig 160, as shown in FIG. 5B, the end portion 124 of the glass tube 120 is heated from its outer periphery using a burner 165.
[0038]
A portion where the end 124 of the glass tube 120 is heated by the burner 165 is a portion substantially corresponding to the outer periphery of the glass ring 125 in the glass tube 120.
By this heating, the end portion 124 of the glass tube 120 is melted and contracted, and the inner periphery of the end portion 124 of the glass tube 120 and the outer periphery of the glass ring 135 are integrated. As a result, the electrode 130 is sealed to the end 125 of the glass tube 120.
[0039]
In the above sealing method, since the end portions 124 and 125 of the glass tube 120 are fused to the glass ring 135, the lead wires 132 and 133 can be maintained in the posture held by the holding jig 160. . Therefore, it is possible to effectively prevent the occurrence of coil touch that occurs when the conventional bead mount type electrode 900 is sealed to the glass tube 920.
[0040]
Further, since ready-made ones can be used for the glass tube 120 and the glass ring 135, for example, the problem that the glass tube cannot be extrapolated to the glass ring hardly occurs, and the electrode 130 can be sealed efficiently.
Furthermore, since the outer diameter of the glass ring 135 corresponds to the inner diameter of the end portions 124 and 125 of the glass tube 120, the clearance between the end portions 124 and 125 of the glass tube 120 and the glass ring 135 can be easily adjusted. In addition, by reducing the clearance, the end portions 124 and 125 of the glass tube 120 and the glass ring 135 can be easily fused simply by heating the end portions 124 and 125 of the glass tube 120.
[0041]
In addition, when the electrode 130 is sealed to the end portions 124 and 125 of the glass tube 120, the thin tube 134 is also attached at the same time, and the thin tube 134 can be used as an exhaust tube.
(C) About the incidence of coil touch
Next, when the electrode was sealed using the sealing method (b), a confirmation test was performed to determine whether or not a coil touch occurred. The test contents and test results will be described below.
[0042]
First, dimensions of the thin tube 134, the glass ring 135, the lead wires 132 and 133, and the glass tube 120 of the electrode 130 used in the test are shown below.
Narrow tube outer diameter 3.0mm, wall thickness 0.4mm, length 95mm
Glass ring outer diameter 5.0mm, wall thickness 0.6mm, height 3.0mm
Lead wire diameter 0.4mm
Glass tube outer diameter 9.0mm, inner diameter 7.4mm
The glass ring 135 and the thin tube 134 are processed with a tolerance that the clearance between them is large, and the glass ring 135 can be extrapolated to the thin tube 134 and the lead wires 132 and 133 disposed on the outer periphery thereof. It has become.
[0043]
As a result of sealing 400 times by the above-described sealing method using the electrode 130 and the glass tube 120 having the above dimensions, the coil touch occurred once and the rate of occurrence of the coil touch was 0.25%. Met.
This result was sealed with a conventional method using a conventional bead mount type electrode.
The occurrence rate of the coil touch at this time is 15% as described in the above section [Problems to be Solved by the Invention]. Therefore, the electrode and the sealing method according to the present embodiment have a coil touch. It can be said that it is extremely effective in preventing.
[0044]
3. Other
In the above description, the case where the electrode according to the present invention is applied to a double spiral arc tube in a bulb-type fluorescent lamp has been described, but the present invention is naturally applicable to arc tubes having other shapes. As other shapes, for example, there are a plurality of (for example, three) glass tubes curved in a “U” shape and a bridge connection of a plurality of straight tubes. The arc tube may be such that the inner surface thereof is not coated with a phosphor.
[0045]
<Modification>
Although the present invention has been described based on the embodiments, the content of the present invention is not limited to the specific examples shown in the above embodiments. For example, the following modifications are possible. Can be implemented.
1. About the lamp
In the above embodiment, the example in which the present invention is applied to the arc tube of a light bulb-type fluorescent lamp has been described. However, the present invention can also be applied to other lamps. Here, a compact fluorescent lamp which is one type of fluorescent lamp will be described below.
[0046]
FIG. 6A is a front view showing an overall configuration in which a part of the lamp is cut out, and FIG. 6B is a plan view of the fluorescent lamp.
As shown in FIGS. 6A and 6B, the fluorescent lamp 500 includes an arc tube 510 formed by combining four “U” -shaped glass tubes 511, and a holding body that holds the arc tube 510. 520 and a single cap 530 attached to the holding body 520 on the side opposite to the side where the arc tube 510 is held.
[0047]
The glass tube 511 includes a pair of straight portions 512 that extend substantially in a straight line and substantially in the vertical direction, and a curved bend portion 513 that straddles the upper end portions (end portions opposite to the holding member) of both the straight portions 512. have.
As shown in FIG. 6B, the four glass tubes 511 are arranged in a substantially square shape in plan view surrounding the periphery of the holding body 520 around the center, and other glass tubes 511. Except for one set, the straight line portion 512 adjacent to is bridge-coupled to the lower end portion of the straight line portion 512 in the other adjacent glass tube 511 via the connecting portion 514. And as shown to (a) of FIG. 6, the electrode 540 is sealed by the edge part of said one set of both linear part 512. As shown to (a) of FIG.
[0048]
Similarly to the embodiment, the electrode 540 includes a filament coil 541 of tungsten wire, a pair of lead wires 542 and 543 that support the filament 541, a narrow tube 544, and a pair of lead wires 542 and 543 of the narrow tube 544. The glass ring 545 is fixed to the outer periphery, and the glass ring 545 is fused to the end of the straight portion 512 of the glass tube 511.
[0049]
The holding body 520 includes a holder 521 that holds the end of the straight portion 512 of each glass tube 511, and a case 522 that is attached to the periphery of the holder 521. The single cap 530 uses the GX24q type, but other types such as the GX10 type may be used.
In addition, although the compact fluorescent lamp without a glove was demonstrated here, you may provide the glove like the lightbulb-type fluorescent lamp 100 in embodiment. Alternatively, other than the compact fluorescent lamp, for example, a fluorescent lamp using a straight tubular arc tube or an annular arc tube may be used.
[0050]
2. About electrodes
(A) Manufacturing method
In the above-described embodiment, the glass ring 135 is used as a method of fixing the pair of lead wires 132 and 133 placed around the outer periphery of the thin tube 134, but other methods may be used. Hereinafter, the case where the lead wire is fixed to the outer periphery of the thin tube by a method different from the embodiment will be described below.
[0051]
FIG. 7 is a diagram illustrating a modification of the lead wire fixing method.
First, the narrow tube 613 and a pair of lead wires 611 and 612 whose outer periphery is arranged in a direction parallel to the axis of the thin tube 613 are held by the chuck portion 630. At this time, one end (the left end in FIG. 7) of the pair of lead wires 611 and 612 extends in a direction parallel to the axial center from one end face (the left end in FIG. 7) of the thin tube 613.
[0052]
Next, the chuck portion 630 that holds the lead wires 611 and 612 and the thin tube 613 is rotated in the direction of the arrow, and the molten glass 621 is dropped onto the fixed positions of the lead wires 611 and 612 on the thin tube 613. Specifically, the glass rod 620 is disposed above the fixed position of the thin tube 613, and the lower end thereof is heated by the burner 640, and the molten glass 621 is dropped.
[0053]
And the glass 621 dripped on the outer periphery of the thin tube 613 hardens | cures when the temperature falls, and finally the fixing member 614 which fixes the lead wires 611 and 612 as shown in FIG. It is formed.
Finally, an electrode is completed when a filament coil is suspended at the tips (left ends) of a pair of lead wires 611 and 612 fixed to the outer periphery of the thin tube 613.
[0054]
As described in the embodiment, when the electrode manufactured as described above is sealed to the end portion of the glass tube, the coil touch that occurs when sealing the conventional electrode 900 is prevented. it can.
Here, in order to fix the lead wires 611 and 612 to the outer periphery of the thin tube 613, the molten glass 621 is dropped on the entire periphery of the thin tube 613. For example, the dropped glass is a lead wire on the thin tube. The fixing member may be configured by dripping along.
[0055]
(B) Glass body
The glass body in the present invention has been described as a hollow cylindrical capillary 134 in the embodiment. However, the glass body may be a solid cylindrical shape. In the embodiment, the end portion is sealed after the thin tube 134 is used as an exhaust pipe. Therefore, among the electrodes sealed at both ends of the glass tube, a hollow columnar shape may be used for the glass body of one electrode, and a solid columnar shape may be used for the glass body of the other electrode. Alternatively, a hollow columnar glass body that is blocked in the middle can also be used.
[0056]
Moreover, although the outer peripheral shape in the cross section of a glass body is circular in embodiment, it may be a polygon and may be an ellipse, for example. However, when the fixing member is extrapolated to the glass body to fix the pair of lead wires arranged on the outer periphery of the glass body, the crossing of the glass body is considered in consideration of the adhesion between the fixing member and the glass body. It is preferable to match the outer peripheral shape of the surface with the inner peripheral shape of the cross section of the fixing member.
[0057]
In addition, the shape of the glass body may have a different outer diameter and / or inner diameter depending on the position in the longitudinal direction. For example, when the fixing member is extrapolated to the glass body, the outer diameter of the portion of the glass body may be increased so that the fixing member can be temporarily fixed at the planned mounting position.
(C) Fixing member
The outer peripheral shape in the cross section of the fixing member is circular in the embodiment, but may be, for example, a polygon or may be an ellipse. However, in the case where the fixing member and the glass tube are welded to each other, it is preferable that the outer peripheral shape in the cross section of the fixing member and the inner peripheral shape in the cross section of the glass tube coincide with each other in consideration of the adhesion between them.
[0058]
3. About sealing process
In the above embodiment, the electrode 130 is sealed to the glass tube 120 by fusing the end portion 124 of the glass tube 120 and the fixing member (glass ring) 135 of the electrode 130, as shown in FIG. As shown in (a), a glass body (capillary tube) such that the fixing member 135 is positioned within the end 711 of the glass tube 710 without fusing the fixing member 135 of the electrode 130 and the end 711 of the glass tube 710. 134 and the end 711 of the glass tube 710 may be fused.
[0059]
Also in this case, the pair of lead wires 132 and 133 that support the filament coil 131 are fixed by the fixing member 135, and the glass body 134 and the end 711 of the glass tube 710 are fused on the lower side thereof.
Therefore, when the end portion 711 of the glass tube 710 and the glass body 134 are fused, the lead wires 132 and 133 below the fixing member 135 are deformed (moved) by the end portion 711 of the molten glass tube 710. Even if it happens, since the pair of lead wires 132 and 133 are fixed to the glass body 134 by the fixing member above, the position of the filament coil 131 is maintained as it is.
[0060]
In the description here, the glass ring 135 similar to that of the embodiment is used as the fixing member. However, for example, lead wires 732 and 733 shown in FIG. Fixing members 735 and 735 for fixing to the outer periphery may be provided individually corresponding to the lead wires 732 and 733. As a method of providing the fixing members 735 and 735 individually, for example, glass to be melted may be dropped onto the lead wires 732 and 733 and fixed.
[0061]
When sealing the electrode 730 provided with the fixing member 735 individually to the end portion 712 of the glass tube 710, the fixing members 735 and 735 are connected to the end of the glass tube 710 as shown in FIG. The glass body 734 and the end portion 712 of the glass tube 710 may be fused so as to be located in the portion 712, and the fixing members 735 and 735 and the end portion 712 of the glass tube 710 are the same as in the embodiment. And may be fused. When the fixing members 735 and 735 and the glass tube 710 are fused, the end portions of the glass tube 710 do not contact the lead wires 732 and 733 extending from the fixing members 735 and 735 to the filament coil 731 side. Is preferred.
[0062]
【The invention's effect】
As described above, the electrode for a lamp according to the present invention includes a filament coil, a pair of lead wires that support the filament coil, and a columnar glass body, and the pair of lead wires includes the filament coil. In a state of being separated from one end of the glass body, the glass body is disposed along a direction parallel to the axis of the glass body and is fixed to the outer periphery of the glass body.
[0063]
For this reason, for example, in a state where the glass body is held, the end portion of the glass tube constituting the arc tube is fixed to the portion where the lead wire is fixed to the glass body, or the lead wire is fixed to the glass body. If the portion is fused to the glass body so that the portion is located in the glass tube, the filament coil is hardly affected by the fusion of the end portion of the glass tube. Therefore, the position of the filament coil is almost unchanged before and after the fusion, and the filament coil is less likely to come into contact with the inner periphery of the glass tube constituting the arc tube.
[0064]
A lamp electrode manufacturing method according to the present invention is a lamp electrode manufacturing method in which a pair of lead wires for holding a filament coil is fixed to the outer periphery of a columnar glass body, and one end of the lead wire is connected to the lamp electrode. A pair of steps disposed on the outer periphery of the glass body and extending from one end of the glass body and extending in a direction parallel to the axis of the glass body at the outer periphery of the glass body A fixing step of fixing a lead wire to the outer periphery of the glass body. For this reason, when sealing an electrode to a glass tube, an electrode with which a filament coil cannot touch the edge part of a glass tube easily can be manufactured.
[0065]
An arc tube according to the present invention is an arc tube in which an electrode is sealed to an end of a glass tube, and the electrode includes a filament coil, a pair of lead wires that support the filament coil, and a columnar shape. And the pair of lead wires are wound along a direction parallel to the axis of the glass body in a state where the filament coil is separated from one end of the glass body, and the outer periphery of the glass body The portion of the glass body that fixes the lead wire and the end of the glass tube, or the portion that fixes the lead wire is positioned within the end of the glass tube. The glass body and the end of the glass tube are fused. For this reason, if the glass body is held when the electrode is sealed to the end of the glass tube, the filament coil is less likely to come into contact with the inner periphery of the glass tube.
[0066]
Further, an arc tube in which an electrode is sealed at an end of a glass tube, the electrode includes a filament coil, a pair of lead wires that are supported by the filament coil, and a columnar glass body, The pair of lead wires are wound along a direction parallel to the axis of the glass body in a state where the filament coil is separated from one end of the glass body, and an annular glass material is provided on the outer periphery of the glass body. The glass tube is sealed by a fixing member, and the end of the glass tube is fused to the fixing member. For this reason, if the glass body is held when the electrode is sealed to the end of the glass tube, the filament coil is less likely to come into contact with the inner periphery of the glass tube.
[0067]
The method of manufacturing an arc tube according to the present invention includes a fixing member made of an annular glass material in a state where a pair of lead wires that support a filament coil lie around the outer periphery of a columnar glass body along the axial direction. The electrode fixed to the outer periphery of the glass body is a method of manufacturing an arc tube sealed to an end of a glass tube, the holding step of holding the glass body of the electrode, and the filament coil It is characterized by including a disposing step disposed in the end portion of the glass tube and a sealing step for sealing the end portion of the disposed glass tube and the fixing member. For this reason, when sealing an electrode to a glass tube, the arc tube in which the filament coil of an electrode cannot contact the edge part of a glass tube easily can be manufactured.
[0068]
The lamp according to the present invention includes the arc tube described above. For this reason, the filament coil of the electrode is less likely to contact the glass tube. Manufacturing yield is improved.
[Brief description of the drawings]
FIG. 1 is a front view in which a part of a light bulb shaped fluorescent lamp in an embodiment is cut away.
FIG. 2 is a front view in which a part of the arc tube in the embodiment is cut away.
FIG. 3A is a front view of an electrode in the embodiment, and FIG. 3B is a side view of the electrode.
FIG. 4 is a diagram illustrating an electrode manufacturing process in an embodiment.
FIG. 5 is a diagram illustrating a process of sealing an electrode to an end portion of a glass tube in the embodiment.
6A is a front view in which a part of the fluorescent lamp is cut out when the present invention is applied to the fluorescent lamp, and FIG. 6B is a plan view in which a part of the fluorescent lamp is cut out.
FIG. 7 is a diagram for explaining another manufacturing method process for manufacturing an electrode according to the present invention.
FIG. 8 is a diagram showing a modification of the present invention.
FIG. 9 is a diagram showing a process of sealing a conventional electrode to an end portion of a glass tube in a bulb-type fluorescent lamp.
[Explanation of symbols]
100 bulb-type fluorescent lamp
110,510 arc tube
120,511 glass tube
130,540 electrodes
131,541 Filament coil
132, 133, 542, 543 Lead wire
134,544 capillaries
135,545 Glass ring
200,520 holder
300 Electronic ballast
380 Base (E17)
400 globe
500 fluorescent lamp
530 base (GX24q)

Claims (11)

And the filament coil comprises a pair of lead wires for steering the filament coil, and a glass body of the tubular, and a fixing member made of a glass material, the pair of lead wires, the filament of the filament coil the glass body The glass body is arranged on the outer periphery of the glass body along a direction parallel to the axis of the glass body in a state separated from one end located on the side close to the coil. An electrode for a lamp, wherein one end of the glass body is fused by the fixing member at a position in the vicinity of one end of the fixing member so as to protrude from one end of the fixing member . The fixing member has an annular shape,
The pair of lead wires is fixed to the glass body in a state where the fixing member is extrapolated between the pair of lead wires and the glass body arranged along the outer periphery of the glass body. The lamp electrode according to claim 1, wherein the lamp electrode is fused to the outer periphery of the body. The lamp electrode according to claim 2, wherein the glass body has a circular tube shape, and a cross-sectional shape of an inner periphery of the fixing member is a circular shape. A pair of lead wires for holding the filament coil is an outer periphery of a tubular glass body, and one end of the glass body is one end of the fixing member at a position near one end located on the side of the glass body close to the filament coil. A method of manufacturing a lamp electrode that is fixed in a state of projecting from , wherein the lead wire is wound around in a direction parallel to the axis of the glass body at the outer periphery of the glass body; And a fixing step of fixing a pair of lead wires disposed on the outer periphery of the glass body by fusing a fixing member made of a glass material at the position on the outer periphery of the glass body. For manufacturing an electrode. The fixing member has an annular shape,
In the fixing step, the glass body is fixed to the pair of lead wires and the glass body arranged along an outer periphery of the glass body in a state where the glass body is erected so that one end of the glass body is on the upper side. The method for manufacturing a lamp electrode according to claim 4, further comprising an extrapolation step of extrapolating a member and a fusion step of fusing the extrapolated fixing member to an outer periphery of the glass body. . In the fixing step, the fusion of the fixing member is performed by dropping a molten glass material onto the pair of lead wires disposed on the outer periphery of the glass body. The manufacturing method of the electrode for lamps of description. An arc tube in which an electrode is sealed at the end of a glass tube,
The electrode includes a filament coil, a pair of lead wires for supporting the filament coil, a tubular glass body, and a fixing member made of a glass material. In the state away from one end of the body, the glass body is wound along a direction parallel to the axis of the glass body, and is near the one end located on the outer periphery of the glass body and closer to the filament coil of the glass body One end of the glass body is fused at a position so that one end of the glass body protrudes from one end of the fixing member, and a portion of the glass body that fixes the lead wire and an end of the glass tube Or the glass body and the end of the glass tube are fused so that the portion fixing the lead wire is located within the end of the glass tube A light-emitting tube according to symptoms. An arc tube in which an electrode is sealed at the end of a glass tube,
The electrode includes a filament coil, a pair of lead wires supported by the filament coil, a tubular glass body, and an annular fixing member made of a glass material, and the pair of lead wires includes the filament coil. One end located on the side of the outer periphery of the glass body near the filament coil in a state parallel to the axis of the glass body in a state separated from one end of the glass body One end of the glass body is sealed by the fixing member at a position near the end of the fixing member, and the end of the glass tube is fused to the fixing member. Arc tube to play. The arc tube according to claim 7 or 8, wherein an end of the glass body opposite to the filament coil side is sealed. The pair of lead wires for holding the filament coil is arranged on the outer periphery of the glass body by a fixing member made of an annular glass material in a state where the outer periphery of the tubular glass body is stretched along the axial direction. An electrode formed by fusing one end of the glass body to protrude from one end of the fixing member at a position near one end located on the side of the body close to the filament coil is sealed to the end of the glass tube A method for manufacturing an arc tube, comprising: a holding step for holding the glass body of the electrode; an arranging step for arranging the filament coil in an end portion of the glass tube; and an end portion of the arranged glass tube And a sealing process for sealing the fixing member. A lamp comprising the arc tube according to any one of claims 7 to 9.

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