JP2004303620A - Electrode for lamp, method of manufacturing electrode for lamp, arc tube, method of manufacturing arc tube, and lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrode possible to be sealed in a glass tube having a small tube diameter without bringing a filament coil and the like into contact with the inner periphery of the glass tube. <P>SOLUTION: This electrode 130 is provided with the filament coil 131, a pair of lead wires 132, 133 holding the filament coil 131 in a suspended condition, a hollow, columnar, and slender tube 134, and an annular glass ring 135, and the pair of lead wires 132, 133 are disposed along the direction in parallel with the axial center of the slender tube 134 with the filament coil 131 separated from one end of the slender tube 134. The glass ring 135 is externally put on the pair of lead wires 132, 133 disposed on the outer periphery of the slender tube 134 and on the slender tube 134, and fused to the outer periphery of the slender tube 134. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD 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 method for manufacturing a lamp electrode, an arc tube, a method for manufacturing an arc tube, and a lamp.
[0002]
[Prior art]
In the energy-saving era, lamps with high lamp efficiency and long life, particularly fluorescent lamps, are attracting attention. Such a fluorescent lamp includes a light emitting tube in which an electrode having a filament coil is sealed at an end of a curved or straight glass tube. In recent years, the diameter of a glass tube constituting an arc tube tends to be smaller due to a demand for a compact fluorescent lamp.
[0003]
FIG. 9 is a view for explaining a process of sealing a conventional electrode to an end of a glass tube. In order to understand the state of the electrode inserted from the end of the glass tube, a part of the glass tube is removed. Notched. FIG. 9 shows a state in which an exhaust pipe used for exhausting the inside of the glass tube is also sealed to an end of the glass tube.
In the electrode 900, a pair of lead wires 911 and 912 for supporting a filament coil 910 are held by a glass bead 913 that has been melt-solidified as shown in FIG.
[0004]
As a method for holding the filament coil in the electrode for the fluorescent lamp, there is a stem mount method other than the above-described bead mount method. Because of the complicated structure, this stem mount type electrode has been applied to a glass tube with a large tube diameter. In recent years, the bead mount has a simpler structure than the stem mount type and can be applied to a glass tube with a small tube diameter. Many types of electrodes are used.
[0005]
Next, a process of sealing the above-described electrode 900 and the exhaust pipe 930 to the end 921 of the glass tube 920 will be described.
First, the holding wires 911 and 912 of the electrode 900 and the exhaust pipe 930 are held by the holding jig 940. The holding jig 940 is formed with holding holes 942, 943, 944 corresponding to the lead wires 911, 912 and the exhaust pipe 930. The vertical alignment between the pair of lead wires 911 and 912 and the exhaust pipe 930 is performed by inserting them to the bottoms of the holding holes 942, 943 and 944.
[0006]
Next, with the lead wires 911 and 912 and the exhaust pipe 930 held by the holding tool 940, the end 921 of the glass tube 920 is extrapolated to these. Then, as shown in FIG. 9B, the end 921 of the glass tube 920 is heated and softened by, for example, a burner 950, and the softened end 921 of the glass tube 920 is pressed against the exhaust pipe 930. And sealing (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 921 of the glass tube 920, the filament coil 910 or the lead wire 912 comes into contact with 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 diameter of the glass tube was large. However, due to the recent reduction in the size of the glass tube due to the downsizing of the arc tube, the degree of coil touch cannot be ignored. %) Began to occur.
When the coil touch occurs, the life of the arc tube is shortened. This involves oxidizing the electron-emitting substance applied to the filament coil by heating the filament coil by applying a current to the lead wire when the inside of the arc tube is evacuated. It escapes from the glass tube in contact with the coil touch. Therefore, the temperature of the filament coil does not rise sufficiently, the oxidation of the electron emitting material becomes insufficient, and impurities remain in the filament coil.
[0010]
The present invention has been made in view of the above-described problems, and is provided for a lamp electrode and a lamp capable of sealing a filament tube or the like to a small-diameter glass tube without contacting the inner peripheral surface of the glass tube. An object of the present invention is to provide a method for manufacturing an electrode, an arc tube, a method for manufacturing an arc tube, and a lamp.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, a lamp electrode according to the present invention includes a filament coil, a pair of lead wires for supporting the filament coil, and a columnar glass body, wherein the pair of lead wires is The filament coil is arranged along a direction parallel to the axis of the glass body in a state separated from one end of the glass body, and is fixed to an outer periphery of the glass body.
[0012]
Here, the “columnar shape” 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. Therefore, when the present electrode is sealed 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 at the time of fusion, and the filament coil is attached to the glass tube. Contact with the inner periphery is reduced.
[0013]
The method for manufacturing a lamp electrode according to the present invention is a method for manufacturing a lamp electrode in which a pair of lead wires for supporting a filament coil is fixed to an outer periphery of a columnar glass body. An arrangement step of extending from one end of the glass body and crawling in a direction parallel to the axis of the glass body at the outer periphery of the glass body, and a pair of arrangement steps arranged on the outer periphery of the glass body. Fixing a lead wire to the outer periphery of the glass body. For this reason, when the electrode is sealed to the glass tube, it is possible to manufacture an electrode in which the filament coil does not easily come into contact with the end of the glass tube.
[0014]
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, wherein the electrode includes a filament coil, a pair of lead wires for supporting the filament coil, and a columnar shape. A glass body, wherein the pair of lead wires crawl along a direction parallel to an axis of the glass body while the filament coil is apart from one end of the glass body, and So that the portion of the glass body fixing the lead wire and the end of the glass tube, or the portion fixing the lead wire is located within the end of the glass tube. The glass body and the end of the glass tube are fused.
[0015]
According to this configuration, the pair of lead wires is fixed to the outer periphery of the glass body, and furthermore, 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 fixed to the glass body. The glass body and the end of the glass tube are fused so that the fixed part is located in the glass tube. For this reason, when the present electrode is sealed to the end of the glass tube, if the glass body is held, it is less likely that the filament coil comes into contact with the inner periphery of the glass tube.
[0016]
Further, an arc tube in which an electrode is sealed to an end portion of the glass tube, wherein the electrode includes a filament coil, a pair of lead wires supported by the filament coil, and a columnar glass body, The pair of lead wires, while the filament coil is separated from one end of the glass body, crawl along a direction parallel to the axis of the glass body, and an annular glass material is provided on the outer periphery of the glass body. And the end of the glass tube is fused to the fixing member.
[0017]
According to this configuration, the pair of lead wires is 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 of the glass tube are fused. For this reason, when the present electrode is sealed to the end of the glass tube, if the glass body is held, it is less likely that the filament coil comes into contact with the inner periphery of the glass tube.
The method for manufacturing an arc tube according to the present invention is characterized in that the fixing member made of an annular glass material is provided in a state in which a pair of lead wires supporting a filament coil are laid along the axial direction of the outer periphery of a columnar glass body. An electrode fixed to the outer periphery of the glass body by the method of manufacturing an arc tube sealed to an end of a glass tube, a holding step of holding the glass body of the electrode, the filament coil The method is characterized by including an arranging step of disposing inside the end of the glass tube, and a sealing step of sealing the end of the arranged glass tube and the fixing member.
[0018]
Therefore, when sealing the electrode to the glass tube, it is possible to manufacture an arc tube in which the filament coil of the electrode does not easily come into contact with the end of the glass tube, and it is possible to improve the production yield of the arc tube.
A lamp according to the present invention includes the above-described arc tube. Therefore, the filament coil of the electrode is less likely to contact the glass tube. Thus, the oxidation treatment of the filament coil can be performed at a predetermined temperature. Therefore, it is possible to prevent the life of the lamp from being shortened.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
<Embodiment>
An embodiment in which the present invention is applied to a compact fluorescent lamp will be described below with reference to FIGS.
1. About the configuration
(A) Configuration of bulb-type fluorescent lamp
As shown in FIG. 1, the light bulb shaped fluorescent lamp 100 includes a light emitting tube 110 formed by bending a glass tube 120 into a double spiral shape, a holder 200 that holds the light emitting tube 110, and housed in the holder 200. And an electronic ballast 300 for turning on the arc tube 110 and a globe 400 covering the arc tube 110.
[0020]
The holding body 200 includes a cylindrical holding member 210 having an end wall formed with a receiving port for receiving the end of the glass tube 120 therein, and a cone-shaped case 250 fitted on the peripheral wall 220 of the holding member 210. Consists of A screw-type mouthpiece 380, for example, an E17 type is attached to a cylindrical portion (a lower end portion in FIG. 1) of the case 250 having a small opening.
[0021]
The electronic ballast 300 is a series inverter system including a plurality of electric components such as capacitors 310, 330, and 340, and a choke coil 320. A board 360 on which these electric components are mounted is attached to the holding member 210. ing.
The globe 400 is made of a glass material having excellent decorativeness, like the incandescent lamp, and has a so-called A-shape. Here, the A-type is used as the shape of the glove 400, but the shape is not limited to this. Also, the gloves need not be provided.
[0022]
The opening 405 of the glove 400 is inserted and attached between the peripheral wall 220 of the holding member 210 and the peripheral wall of the case 250 on which the glove 400 is fitted. The glove 400 is fixed by using an adhesive 420 filled between the holding member 210 and the case 250.
The inner peripheral surface of the top 406 of the globe 400 is thermally coupled to the protrusion 126 at the top of the arc tube 110 via a heat conductive medium 410, specifically, a silicon resin. In addition, in this specification, the “top” indicates a tip portion in a direction in which the arc tube 110 extends from the holder 200 with reference to a 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 has a folded portion 121 formed by folding a glass tube at substantially the center thereof, and both sides of the folded portion 121 are extended to their ends 124 and 125 in the direction B around the pivot axis A. It has a double helical shape composed of two turning parts 122 and 123 turned in the same manner. The direction parallel to the turning axis A is hereinafter referred to as “the turning axis direction”. The glass tube 120 is made of, for example, soft glass made of strontium-barium silicate glass, and has a substantially circular cross section.
[0024]
A rare earth phosphor 140 is applied to the inner surface of the glass tube 120. The phosphor 140 is, for example, red (Y ₂ O ₃ : Eu), green (LaPO) ₄ : Ce, Tb) and blue (BaMg) ₂ Al ₁₆ O ₂₇ : Eu, Mn).
Electrodes 130 to be described later are sealed to both ends 124 and 125 of the glass tube 120. In addition, mercury, for example, about 3 mg is sealed in the glass tube 120, and a mixed gas of argon and neon (Ar: 75%, Ne: 25%) is used as a buffer gas, for example, at 600 Pa. Enclosed. Note that the buffer gas need not be a mixed gas of argon and neon, and 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 supporting the filament coil 131 (holding the filament coil 131 in a 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 connect the filament coil 131 to the axis from the end face of the thin tube 134 to the axis. Are arranged along the axial direction (longitudinal direction) of the thin tube 134 so as to be separated in a desired direction, and are fixed to the outer periphery of the thin tube 134 by a glass ring 135.
[0026]
In FIG. 3, the filament coil 131 is located on the axis of the thin tube 134. However, when the electrode 130 is inserted into the ends 124 and 125 of the glass tube 120, the ends of the ends 124 and 125 of the glass tube 120 are removed. The lead wires 132 and 133 supporting 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 substance containing BaO-CaO-SrO as a main component. For the lead wires 132 and 133, for example, an alloy of iron, nickel, and chromium is used.
[0027]
As the thin tube 134, a glass tube having a circular cross section is used. By forming the 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, a 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) exhausts the inside of the glass tube 120, and after sealing mercury and a buffer gas, for example, Is sealed by a chip-off method.
[0028]
The cross-sectional shape of the glass ring 135 is the same as the cross-sectional shape of the thin tube 134, the inner diameter corresponds to the outer diameter of the thin tube 134, and the outer diameter is determined corresponding to the inner diameter of the glass tube 120. I have.
Note that the thin tube 134 and the glass ring 135 are made of soft glass that is the same material as the glass tube 120 that forms the arc tube 110.
[0029]
2. About the arc tube manufacturing method
(A) Manufacturing method of electrode
A method for manufacturing the electrode 130 having the above configuration will be described with reference to FIG.
First, a pair of lead wires 132 and 133 and a thin tube 134 are prepared, and 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. Then, these are held in a holding jig 150 in a state where they are laid.
[0030]
A holding hole 152 is formed in the holding jig 150 so as to correspond to the thin tube 134, and holding grooves 153 and 154 are formed to face both sides of the holding hole 152 so as to correspond to a pair of lead wires 132 and 133. ing. The vertical alignment of the pair of lead wires 132 and 133 and the thin tube 134 is performed by inserting them into the holding holes 152 and the bottoms of 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. Are set so that the distance L2 between the upper end of the holding jig 150 and the upper surface of the holding jig 150 is 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 the glass ring 135 is brought into contact with the upper surface of the jig 150, the glass ring 135 is heated from the outer periphery thereof using the burner 155, as shown in FIG.
[0032]
This heating causes the glass ring 135 to melt and shrink, the inner periphery of the glass ring 135 and the outer periphery of the thin tube 134 become integral, 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. Then, after the filament coil 131 is wound, the lead wires 132 and 133 above the filament coil 131 are folded back, and the portion is crimped to hold the filament coil 131. The electrode 130 is manufactured by the above steps.
[0033]
In the electrode 130 manufactured by the above method, a pair of lead wires 132 and 133 for supporting the filament coil 131 are fixed to the outer periphery of the thin tube 134 by the glass ring 135. , And the operability can be improved as compared with the conventional bead mount type electrode 900.
[0034]
In addition, in the above-described method for manufacturing the electrode 130, a ready-made product (machined product) can be used for the thin tube 134 and the glass ring 135. The electrode 130 can be manufactured.
Further, since the melting and shrinkage of the glass ring 135 is used when sealing the lead wires 132 and 133 to the outer periphery of the thin tube 134, a glass ring 135 having an inner diameter corresponding to the outer diameter of the thin tube 134 can be used. For example, the lead wires 132 and 133 can be easily hermetically sealed in the thin tube 134 only by heating the glass ring 135.
[0035]
(B) Method of sealing electrode to glass tube end
The process of sealing the electrode 130 manufactured by the above manufacturing method to the end 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 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 125 of the glass tube 120.
[0036]
First, the electrode 130 is set and held on the holding jig 160 as shown in FIG. A holding hole 161 is formed in the holding jig 160 so as to vertically hold the electrode 130 (specifically, the thin tube 134). The size of the holding hole 161 is such that the glass ring 135 does not fit therein. When the lower surface of the glass ring 135 contacts the upper surface of the holding jig 160, the holding hole 161 is inserted into the height of the electrode 130, that is, into the glass tube 120. Specifies the amount.
[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 of the glass tube 120 on the end 124 side is changed. When the glass tube 120 comes into contact with the upper surface of the holding jig 160, the end 124 of the glass tube 120 is heated from the outer periphery thereof using a burner 165, as shown in FIG.
[0038]
The 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.
This heating causes the end 124 of the glass tube 120 to melt and shrink, so that the inner periphery of the end 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-described sealing method, the ends 124 and 125 of the glass tube 120 are fused to the glass ring 135, so that the lead wires 132 and 133 can maintain 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]
In addition, since a ready-made glass tube 120 and glass ring 135 can be used, for example, a problem that the glass tube cannot be extrapolated to the glass ring hardly occurs, and the electrode 130 can be efficiently sealed.
Further, since the outer diameter of the glass ring 135 corresponds to the inner diameter of the ends 124 and 125 of the glass tube 120, it is easy to adjust the clearance between the ends 124 and 125 of the glass tube 120 and the glass ring 135, In addition, by reducing the clearance, the ends 124 and 125 of the glass tube 120 and the glass ring 135 can be easily fused only by heating the ends 124 and 125 of the glass tube 120.
[0041]
Moreover, when the electrode 130 is sealed to the ends 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 pipe.
(C) About the incidence of coil touch
Next, a confirmation test was performed as to whether or not coil touch occurred when the electrodes were sealed using the sealing method (b). The test contents and test results will be described below.
[0042]
First, dimensions of the thin tube 134 of the electrode 130, the glass ring 135, the lead wires 132 and 133, and the glass tube 120 used in the test are shown below.
Small 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
In addition, the glass ring 135 and the thin tube 134 are machined with a tolerance to increase the clearance between them, and the glass ring 135 can be extrapolated to the thin tube 134 and the lead wires 132 and 133 arranged on the outer periphery thereof. Has become.
[0043]
As a result of performing the sealing 400 times by the above-described sealing method using the electrode 130 and the glass tube 120 having the above dimensions, one coil touch occurred, and the occurrence rate of the coil touch was 0.25%. Met.
This result was sealed by the conventional method using the conventional bead mount type electrode.
When the occurrence rate of coil touch is above
As described in the section, since the ratio is 15%, it can be said that the electrode and the sealing method according to the present embodiment are extremely effective in preventing coil touch. .
[0044]
3. Other
In the above description, a case has been described in which the electrode according to the present invention is applied to a double-helical arc tube in a bulb-type fluorescent lamp, but the present invention is naturally applicable to arc tubes of 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 thereof, and a plurality of straight tubes bridge-bonded. The luminous tube may be such that the inner surface thereof is not coated with a phosphor.
[0045]
<Modification>
As described above, the present invention has been described based on the embodiments. However, it is needless to say that the contents of the present invention are not limited to the specific examples shown in the above embodiments. Can be implemented.
1. About the lamp
In the above-described embodiment, an example in which the present invention is applied to the arc tube of the bulb-type fluorescent lamp has been described, but the present invention can 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 the entire configuration of the lamp in which a part of the lamp is cut away, 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 connecting four “U” -shaped glass tubes 511 and a holder for holding the arc tube 510. 520, and a one-sided base 530 attached to a side of the holder 520 opposite to a side where the arc tube 510 is held.
[0047]
The glass tube 511 includes a pair of linear portions 512 extending substantially linearly and substantially parallel in the vertical direction, and a curved curved portion 513 straddling the upper ends (ends opposite to the holding member) of the linear 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 center of the holder 520 and surrounding the center of the holder 520. , Except for one set, the lower end of the straight portion 512 is bridge-connected to the lower end of the straight portion 512 of another adjacent glass tube 511 via a connecting portion 514 so as to be able to communicate therewith. As shown in FIG. 6A, an electrode 540 is sealed to an end of the pair of straight portions 512.
[0048]
Similarly to the embodiment, the electrode 540 includes a tungsten wire filament coil 541, a pair of lead wires 542, 543 for supporting the filament 541, a thin tube 544, and a pair of lead wires 542, 543. A glass ring 545 fixed to the outer periphery, and the glass ring 545 is fused to an end of the linear portion 512 of the glass tube 511.
[0049]
The holding body 520 includes a holder 521 that holds an end of the linear portion 512 of each glass tube 511, and a case 522 attached to a peripheral edge of the holder 521. In addition, although the GX24q type is used for the one base 530, another type, for example, a GX10 type may be used.
Although a compact fluorescent lamp without gloves has been described here, globes may be provided as in the bulb-type fluorescent lamp 100 in the embodiment. Alternatively, other than the compact fluorescent lamp, for example, a fluorescent lamp using a straight tube 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 for fixing the pair of lead wires 132 and 133 laid around the outer circumference of the thin tube 134, but another method may be used. Hereinafter, a 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 showing a modification of the method for fixing the lead wires.
First, the chuck 630 holds the thin tube 613 and a pair of lead wires 611 and 612 whose outer circumference is arranged in a direction parallel to the axis of the thin tube 613. At this time, one end (left end in FIG. 7) of the pair of lead wires 611 and 612 extends in a direction parallel to the axis of the thin tube 613 than one end surface (left end in FIG. 7).
[0052]
Next, the chuck 630 holding 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 on the thin tube 613 at a position where the lead wires 611 and 612 are to be fixed. Specifically, a glass rod 620 is disposed above the position where the thin tube 613 is to be fixed, and the lower end thereof is heated by the burner 640, and the molten glass 621 is dropped.
[0053]
Then, the glass 621 dropped on the outer periphery of the thin tube 613 hardens when its temperature decreases, and finally, a fixing member 614 for fixing the lead wires 611 and 612 as shown in FIG. It is formed.
Finally, when a filament coil is suspended around the tips (left ends) of the pair of lead wires 611 and 612 fixed to the outer periphery of the thin tube 613, the electrode is completed.
[0054]
When the electrode manufactured as described above is sealed to the end of the glass tube as described in the embodiment, it is possible to prevent the coil touch that occurs when the conventional electrode 900 is sealed. it can.
Here, in order to fix the lead wires 611 and 612 on the outer circumference of the thin tube 613, the molten glass 621 is dropped on the entire circumference of the thin tube 613. To form a fixing member.
[0055]
(B) Glass body
In the embodiment, the glass body in the present invention has been described as the hollow cylindrical thin tube 134. However, the glass body may be a solid cylinder. In the embodiment, the end is sealed after using the thin tube 134 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 closed halfway can also be used.
[0056]
Further, the outer peripheral shape in the cross section of the glass body is circular in the embodiment, but may be, for example, polygonal or even elliptical. However, in order to fix the pair of lead wires arranged on the outer periphery of the glass body, when extrapolating the fixing member to the glass body, considering the adhesion between the fixing member and the glass body, the crossing of the glass body is considered. It is preferable that the outer peripheral shape of the surface coincides with the inner peripheral shape of the cross section of the fixing member.
[0057]
Note that the shape of the glass body may be such that the outer diameter and / or the inner diameter vary 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 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, polygonal or even elliptical. However, when 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 coincides with the inner peripheral shape in the cross section of the glass tube in consideration of the adhesion between them.
[0058]
3. About the sealing process
In the above embodiment, the electrode 130 is sealed to the glass tube 120 by fusing the end 124 of the glass tube 120 and the fixing member (glass ring) 135 of the electrode 130. As shown in (a), the fixing member 135 of the electrode 130 and the end 711 of the glass tube 710 are not fused, and the fixing member 135 is positioned inside the end 711 of the glass tube 710 (a thin tube). 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 below the pair.
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 such a situation occurs, the pair of lead wires 132 and 133 is fixed to the glass body 134 by a fixing member thereabove, so that the position of the filament coil 131 is maintained as it is.
[0060]
In the description here, a glass ring 135 similar to the embodiment is used as the fixing member. For example, lead wires 732 and 733 as shown in FIG. The fixing members 735 and 735 fixed to the outer periphery may be individually provided corresponding to the respective lead wires 732 and 733. As a method of individually providing the fixing members 735 and 735, for example, a glass to be melted may be dropped and fixed to each of the lead wires 732 and 733.
[0061]
When the electrode 730 provided with such a fixing member 735 individually is sealed to the end 712 of the glass tube 710, as shown in FIG. 8B, the fixing members 735 and 735 are connected to the end of the glass tube 710. The glass body 734 and the end 712 of the glass tube 710 may be fused so as to be located within the portion 712, or the fixing members 735 and 735 and the end 712 of the glass tube 710 as in the embodiment. May be fused. When the fixing members 735 and 735 are fused to the glass tube 710, the ends 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 lamp electrode according to the present invention includes a filament coil, a pair of lead wires for supporting the filament coil, and a columnar glass body, and the pair of lead wires includes the filament coil. The glass body is arranged along a direction parallel to the axis of the glass body, away from one end of the glass body, and is fixed to the outer periphery of the glass body.
[0063]
For this reason, for example, while holding the glass body, the end 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 part is fused to the glass body so that it is located within the glass tube, the filament coil is hardly affected by the fusion of the end of the glass tube. Therefore, the position of the filament coil hardly changes before and after fusion, and the filament coil rarely comes into contact with the inner periphery of the glass tube constituting the arc tube.
[0064]
The method for manufacturing a lamp electrode according to the present invention is a method for manufacturing a lamp electrode in which a pair of lead wires for supporting a filament coil is fixed to an outer periphery of a columnar glass body. An arrangement step of extending from one end of the glass body and crawling in a direction parallel to the axis of the glass body at the outer periphery of the glass body, and a pair of arrangement steps arranged on the outer periphery of the glass body. Fixing the lead wire to the outer periphery of the glass body. For this reason, when the electrode is sealed to the glass tube, it is possible to manufacture an electrode in which the filament coil does not easily come into contact with the end of the glass tube.
[0065]
An arc tube according to the present invention is an arc tube in which an electrode is sealed to an end portion of a glass tube, wherein the electrode has a filament coil, a pair of lead wires for supporting the filament coil, and a columnar shape. A glass body, wherein the pair of lead wires crawl along a direction parallel to an axis of the glass body while the filament coil is apart from one end of the glass body, and So that the portion of the glass body fixing the lead wire and the end of the glass tube, or the portion fixing the lead wire is located within the end of the glass tube. The glass body and the end of the glass tube are fused. For this reason, when the present electrode is sealed to the end of the glass tube, if the glass body is held, it is less likely that the filament coil comes into contact with the inner periphery of the glass tube.
[0066]
Further, an arc tube in which an electrode is sealed to an end portion of the glass tube, wherein the electrode includes a filament coil, a pair of lead wires supported by the filament coil, and a columnar glass body, The pair of lead wires, while the filament coil is separated from one end of the glass body, crawl along a direction parallel to the axis of the glass body, and an annular glass material is provided on the outer periphery of the glass body. And the end of the glass tube is fused to the fixing member. For this reason, when the present electrode is sealed to the end of the glass tube, if the glass body is held, it is less likely that the filament coil comes into contact with the inner periphery of the glass tube.
[0067]
The method for manufacturing an arc tube according to the present invention is characterized in that the fixing member made of an annular glass material is provided in a state in which a pair of lead wires supporting a filament coil are laid along the axial direction of the outer periphery of a columnar glass body. An electrode fixed to the outer periphery of the glass body by the method of manufacturing an arc tube sealed to an end of a glass tube, a holding step of holding the glass body of the electrode, the filament coil The method is characterized by including an arranging step of disposing inside the end of the glass tube, and a sealing step of sealing the end of the arranged glass tube and the fixing member. Therefore, when sealing the electrode to the glass tube, it is possible to manufacture an arc tube in which the filament coil of the electrode does not easily come into contact with the end of the glass tube.
[0068]
A lamp according to the present invention includes the above-described arc tube. Therefore, the filament coil of the electrode is less likely to contact the glass tube. The production 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 according to an embodiment is cut away.
FIG. 2 is a front view in which a part of the arc tube is cut away in the embodiment.
FIG. 3A is a front view of an electrode according to the embodiment, and FIG. 3B is a side view of the electrode.
FIG. 4 is a diagram illustrating a manufacturing process of the electrode in the embodiment.
FIG. 5 is a diagram illustrating a step of sealing an electrode to an end of a glass tube in the embodiment.
FIG. 6A is a front view in which a part of a fluorescent lamp is cut out when the present invention is applied to a fluorescent lamp, and FIG. 6B is a plan view in which a part of the fluorescent lamp is cut out.
FIG. 7 is a view for explaining another manufacturing method for manufacturing the electrode according to the present invention.
FIG. 8 is a diagram showing a modification of the present invention.
FIG. 9 is a view showing a step of sealing a conventional electrode to an end 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 capillary
135,545 glass ring
200,520 Holder
300 electronic ballast
380 base (E17)
400 gloves
500 fluorescent lamp
530 base (GX24q)

Claims (13)

A filament coil, a pair of lead wires for supporting the filament coil, and a columnar glass body, wherein the pair of lead wires are separated from one end of the glass body by the glass body. Characterized by being arranged along a direction parallel to the axis of the glass body and fixed to the outer periphery of the glass body. The fixing of the pair of lead wires to the glass body was performed by externally attaching a fixing member made of an annular glass material to the pair of lead wires and the glass body arranged along the outer periphery of the glass body. 2. The lamp electrode according to claim 1, wherein the electrode is formed by fusing the outer periphery of the glass body in a state. The lamp electrode according to claim 2, wherein the glass body has a columnar shape, and a cross-sectional shape of an inner periphery of the fixing member is circular. The electrode for a lamp according to any one of claims 1 to 3, wherein the glass body is hollow. The lamp electrode according to claim 1, wherein the pair of lead wires is fixed to an outer periphery of the glass tube using a molten glass material. A method for manufacturing a lamp electrode in which a pair of lead wires supporting a filament coil is fixed to an outer periphery of a columnar glass body, wherein one end of the lead wire is extended from one end of the glass body, and An arranging step of crawling in a direction parallel to the axis of the glass body on the outer periphery of the glass body, and fixing a pair of lead wires arranged on the outer periphery of the glass body to the outer periphery of the glass body And a method for producing an electrode for a lamp. The lamp electrode includes a fixing member made of an annular glass material, and the fixing step includes extrapolating the fixing member to the pair of lead wires and the glass body arranged along the outer periphery of the glass body. The method for manufacturing an electrode for a lamp according to claim 6, further comprising an extrapolating step of performing an extrapolating step and a fusing step of fusing the extrapolated fixing member to an outer periphery of the glass body. The fixing step is characterized in that a molten glass material is dropped on the pair of lead wires provided on the outer periphery of the glass body, and the pair of lead wires is fixed to the glass body. The method for manufacturing a lamp electrode according to claim 7. An arc tube in which an electrode is sealed to an end of a glass tube, wherein the electrode includes a filament coil, a pair of lead wires for supporting the filament coil, and a columnar glass body. The lead wire of the filament coil is laid 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 is fixed to the outer periphery of the glass body. The glass body and the glass tube such that the part of the body fixing the lead wire and the end of the glass tube, or the part fixing the lead wire is located within the end of the glass tube. An arc tube whose end is fused. An arc tube in which an electrode is sealed to an end of a glass tube, wherein the electrode includes a filament coil, a pair of lead wires suspended from the filament coil, and a columnar glass body. The filament wire is made to crawl along a direction parallel to the axis of the glass body while the filament coil is apart from one end of the glass body, and is formed of an annular glass material on the outer periphery of the glass body. An arc tube sealed by a fixing member, wherein an end of the glass tube is fused to the fixing member. The arc tube according to claim 9, wherein the glass body has a hollow cylindrical shape, and an end opposite to the filament coil side is sealed. A pair of lead wires for supporting the filament coil are fixed to the outer periphery of the glass body by a fixing member made of an annular glass material while the outer periphery of the columnar glass body is laid along the axial direction. A method for manufacturing an arc tube in which an electrode is sealed to an end of a glass tube, comprising: a holding step of holding a glass body of the electrode; and arranging the filament coil in an end of the glass tube. And a sealing step of sealing an end of the glass tube provided and the fixing member. A lamp comprising the arc tube according to any one of claims 9 to 11.

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