KR100571137B1 - Bulb for inductively coupled electrodeless annular fluorescent lamp and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a bulb for an inductively coupled electrodeless annular fluorescent lamp and a method of manufacturing the same, and more particularly, to uniform the thickness of the bent portion to reduce the breakage rate and failure rate, and to shorten the production process to simplify the manufacturing equipment The present invention relates to a bulb for an inductively coupled electrodeless annular fluorescent lamp that reduces the cost of a product and improves the reliability of the product, and a manufacturing method thereof.

In the inductively coupled electrodeless annular fluorescent lamp bulb according to the present invention, the outer periphery of the corner where the bent portion 40 is perpendicular to the first to fourth connection tubes (15, 16, 17, 18) is the inner periphery 43 is a circular shape, the outer lower half portion 42 is a semicircular shape, the upper half portion 41 is a sawtooth shape, and the cross section orthogonal to the outermost cross section at the upper half portion 41 is formed in a rhombus shape toward the edge portion. It is done.

Inductive coupling, electrodeless, fluorescent lamp, bulb, bend

Description

Bulb for inductively coupled electrodeless annular fluorescent lamp and its manufacturing method {INDUCTIVELY COUPLING ELECTRODELESS FLUORESCENT TUBULAR LAMP ENVELOPE AND METHOD OF MANUFACTURE}

1 is a bulb for an inductively coupled electrodeless annular fluorescent lamp according to an embodiment of the present invention,

2 is a flow chart of a method of manufacturing a bulb for an inductively coupled electrodeless annular fluorescent lamp according to the present invention;

3 is a process explanatory diagram of a part for explaining a method for manufacturing a bulb for an inductively coupled electrodeless annular fluorescent lamp according to the present invention;

Figure 4 is a primary light-transporting glass tube of the bulb for inductively coupled electrodeless annular fluorescent lamp according to one embodiment of the present invention,

5 is a cross-sectional view of FIG. 4;

6 is a cross-sectional view taken along the line A-A of FIG. 4;

7 is a cross-sectional view taken along the line B-B in FIG. 1;

8 is a sectional view taken along the line C-C in FIG.

<Description of Symbols for Main Parts of Drawings>

10: primary light transfer glass tube 14, 24: exhaust

15, 16, 17, 18: connecting tube 19: body

20: secondary light transfer glass tube 26: the junction

30: phosphor 35: gas burner

40: bend part 41: upper half

42: lower half 43: inner periphery

44: protrusion 50: mold

The present invention relates to a bulb for an inductively coupled electrodeless annular fluorescent lamp and a method of manufacturing the same, and more particularly, to uniform the thickness of the bent portion to reduce the breakage rate and failure rate as well as to shorten the production process to simplify the manufacturing equipment. The present invention relates to a bulb for an inductively coupled electrodeless annular fluorescent lamp and a method of manufacturing the same, which reduce the cost of the product and improve the reliability of the product.

Electrodeless fluorescent lamps are electric field-coupled type for discharging electrodeless by applying high frequency electric field to capacitor, and magnetically coupled type (also called 'inductively coupled') discharge lamps for high-frequency current flowing to coil wound around lamp. There is. The electrodeless fluorescent lamp discharges a mixed gas of argon, krypton, and mercury, which is a typical rare gas, to emit visible light through a phosphor coated on the inner surface of the container with ultraviolet rays emitted from mercury.

The bulb for the electrodeless fluorescent lamp is patented for the structure of the bulb for the fluorescent lamp in the patent of David C. Wentzel (ex. 2) disclosed in the US Patent No. 5,932,961 (CLOSED-LOOP TUBULAR LAMP ENVELOPE AND METHOD OF MANUFACTURE), In the detailed description, a structure and a manufacturing method of a bulb for a fluorescent lamp are disclosed.

According to the David patent, a glass tube having a predetermined diameter and thickness is cut, and a dome is formed on the cut one side of the tube, and then bent to form one side. Thereafter, the other side also forms a dome in the same manner as the one side, and the phosphor is coated on the inner side of the glass tube to complete the primary glass tube. In addition, after completing the secondary tube in the same process as described above to form an exhaust pipe in the primary glass tube and the secondary glass tube, and melt-bonding the primary glass tube and the secondary glass tube to complete the electrodeless fluorescent lamp. .

However, the David patent has a problem that the manufacturing process is very complicated as described above, the production equipment is complicated and the defect rate is high. In addition, since the bent portion of the electrodeless fluorescent lamp manufactured as described above is difficult to form a constant thickness, there is a problem that the bent portion is easily broken and the reliability of the product is lowered.

The present invention is to solve the above problems, an object of the present invention is to form a bent portion of the tube at a certain angle to form a thicker than the body of the bent portion to improve the robustness of the product, shorten the production process It is to provide a bulb for an inductively coupled electrodeless annular fluorescent lamp and its manufacturing method that can simplify the manufacturing equipment to reduce the manufacturing cost, improve the reliability of the product.

Bulb for inductively coupled electrodeless annular fluorescent lamp according to the present invention is bent at both sides of the bent portion 40 on both sides of the annular glass tube body hollow in a certain thickness and diameter to the primary connection tube 15 and 2 Primary light-transporting glass tube 10 having a primary connection tube 16 formed therein, and a secondary connection tube 17 and a secondary connection tube 18 formed in the same manner as the primary optical movement glass tube 10. The light-shielding glass tube 20, the primary connecting tube 15, the tertiary connecting tube 17, and the secondary connecting tube 16 and the fourth connecting tube 18 are melt-bonded, respectively, to obtain a Perup. And an inductively coupled electrodeless annular fluorescent lamp having a plurality of exhaust portions 24 formed therein for acquiring amalgam in the primary and tertiary connecting tubes 15 and 17 or the secondary and fourth connecting tubes 16 and 18. In the bulb, the bent portion 40, the outermost cross section of the corner perpendicular to the first to fourth connection tubes (15, 16, 17, 18) is the inner peripheral portion 43 is circular, the outerThe lower half portion 42 is semicircular and the upper half portion 41 is sawtooth-shaped, and the cross section orthogonal to the outermost cross section in the upper half portion 41 is characterized by being formed in a rhombus shape toward the edge portion.

On the other hand, the method of manufacturing a bulb for inductively coupled electrodeless annular fluorescent lamp according to the present invention, by cutting a hollow glass tube of a certain thickness and diameter to a certain length, and bent at both ends by heating the bent portion of the cut glass tube A primary optical glass tube having a primary connecting tube and a secondary connecting tube formed therein and a secondary optical mobile glass tube having a bent tertiary connecting tube and a fourth connecting tube formed therein, and the formed primary optical glass tube And the end of the first to fourth connection tube of the secondary light-transporting glass tube to coat the phosphor on the inner surface, and the first or third connection of the primary light-transporting glass tube and the secondary light-transporting glass tube The first connection tube is formed to form an exhaust portion in which an amalgam is accommodated on one side of the tube and the second or fourth connection tube, and the primary light movement glass tube and the secondary light movement glass tube in which the exhaust portion is formed are formed of a bellows. A method of manufacturing a bulb for an inductively coupled electrodeless annular fluorescent lamp formed in a rectangular frame shape by melting and joining a third connecting tube and a second connecting tube and a fourth connecting tube, respectively; In the secondary light-moving glass tube, the outermost cross section of the corner where the bent portion is perpendicular to the first to fourth connection tubes is the inner peripheral portion is circular, the outer lower half is semicircular and the upper half is sawtooth shaped, and in the upper half The cross section orthogonal to the outermost cross section is a mold seating step of seating on a mold formed in a diamond shape toward the corner portion, and the thickness of the primary light-transporting glass tube seated on the mold is uniformly supplied by supplying air at a constant pressure. Characterized in that it further comprises a thickness forming step, and a slow cooling step of gradually cooling the molded primary light-moving glass tube The.

Hereinafter, a bulb for an inductively coupled electrodeless annular fluorescent lamp of the present invention and a manufacturing method thereof will be described in detail with reference to the accompanying drawings.

1 is a bulb for an inductively coupled electrodeless annular fluorescent lamp according to an embodiment of the present invention, Figure 2 is a flow chart of a method of manufacturing a bulb for an inductively coupled electrodeless annular fluorescent lamp according to the present invention, Figure 3 Partial process explanatory diagram for explaining a method for manufacturing a bulb for an inductively coupled electrodeless annular fluorescent lamp according to the present invention, Figure 4 is one of the bulb for an inductively coupled electrodeless annular fluorescent lamp according to one embodiment of the present invention. 5 is a cross-sectional view of the line AA of FIG. 4, FIG. 7 is a cross-sectional view of the line BB of FIG. 1, and FIG. 8 is a cross-sectional view of the CC line of FIG.

Bulbs for the inductively coupled electrodeless annular fluorescent lamp according to a preferred embodiment of the present invention, as shown in Figs. 1 to 8, the bent portion 40 in both tubes of the body 19 of a constant thickness and diameter Bent at the boundary to form a primary light transfer glass tube 10 and a primary connection tube 15 and a secondary connection tube 16, the secondary light formed in the same manner as the primary optical glass tube 10 The moving glass tube 20 is formed by melt bonding at the bonding portion 26. In addition, the primary connecting tube 15 or the secondary connecting tube 16 of the primary optical glass glass tube 10 and the secondary connecting tube 17 or the fourth connecting tube of the secondary optical glass glass tube 20. On one side of 18, exhaust parts 14 and 24 in which amalgams are accommodated are formed.

A characteristic of the present invention is the bent portion 40, as shown in Figs. 5 to 8, the inner peripheral portion 43 of the bent portion 40 forms a circular shape, the outer upper half 41 is sawtooth shape The lower half 42 forms a semicircular shape. In other words, the outer periphery of the corners perpendicular to the first to fourth connection tubes 15, 16, 17, and 18 has an inner peripheral portion 43 having a circular shape, and the lower half 42 of the outer portion has a semicircular shape and an upper half portion ( 41 is a sawtooth shape, the cross section orthogonal to the outermost cross section in the upper half portion 41 is formed in a rhombus shape with protrusions 44 formed on both sides toward the edge portion.

Therefore, the bulb thickness of the bent portion 40 is formed thickest at the point where the upper half 41 and the lower half 42 are bordered and the corners of the sawtooth-shaped portion to prevent breakage of the bulb.

On the other hand, the phosphor 30 is coated on the inner surfaces of the primary light moving glass tube 10 and the secondary light moving glass tube 20. The fluorescent substance 30 uses the same thing as the prior art.

The manufacturing method of the bulb for the inductively coupled electrodeless annular fluorescent lamp of the present invention formed as described above will be described in detail.

First, in order to manufacture the primary optical glass tube 10 is cut in consideration of the length of the main body 19 and the length of the primary connecting tube 15 and the secondary connecting tube 16 (S10). At this time, the thickness of the glass tube is preferably used 2.0mm to 3.0mm.

The bent portion 40 corresponding to the length of the main body 19 on both sides of the cut glass tube is heated using the gas burner 35 (S12). At this time, the heating is a known technique for heating while rotating the glass tube.

Thereafter, the bent portion 40 is bent at a right angle so that the primary connection tube 15 and the secondary connection tube 16 are formed on the basis of the bent portion 40, and are seated on the mold 50 (S14). At this time, the mold 50 is the outermost cross-section of the corner perpendicular to the primary and secondary connecting tubes (15, 16), the inner peripheral portion 43 is circular, the outer lower half 42 is semi-circular, upper half Reference numeral 41 is a sawtooth shape, the cross section orthogonal to the outermost cross section in the upper half portion 41 is formed in a rhombus shape in which protrusions 44 are formed on both sides toward the edge portion.

Since the primary light mobile glass tube 10 seated on the mold 50 is not in a constant state and is not yet completely solidified, the thickness of the primary light mobile glass tube 10 is uniformly maintained at a constant pressure. Molding by supplying air (S16). Since such an air forming method is a known technique, a detailed description thereof will be omitted.

Thereafter, the molded primary light-moving glass tube 10 is gradually cooled (Annealing; S18).

In addition, the ends of the primary connection tube 15 and the secondary connection tube 16 of the slow cooled primary light-transporting glass tube 10 are polished and the phosphor 30 is coated on the inner surface (S20 and S22). .

After completing the primary optical glass tube 10 as described above, the step S22 in the step S10 is formed to form the same tertiary connecting tube 17 and the fourth connecting tube 18 and the first optical glass glass tube A secondary light moving glass tube 20 is manufactured (S24).

On one side of the first or third connection tube (15, 16) and the second or quaternary connection tube (17, 18) of the primary optical glass tube 10 and the secondary optical glass glass tube 20 produced The exhaust parts 14 and 24 in which amalgams are accommodated are respectively formed (S26). As described above, the primary connecting tube 15 and the tertiary connecting tube 17 and the secondary light transmitting glass tube 10 and the secondary optical moving glass tube 20 in which the exhaust parts 14 and 24 are formed. Fluorescent lamps are formed by melting the end portions of the primary connecting tube 16 and the fourth connecting tube 18 by melting the inner ends of the primary optical glass tube 10 and the secondary optical glass tube 20. Complete the bulb (S28).

As described above, the manufacturing method according to the present invention is formed by simultaneously molding the bent portion 40 of the primary connecting tube 15 and the secondary connecting tube 16 by using the mold 50, compared to the conventional manufacturing method. Simply do. In addition, the thickness of the edge of the bulb is made thin so that the shape of the bent portion 40 to form a rhombus shape in order to prevent the breakage of the product easily formed to form a thick thickness of the contact portion. Therefore, damage to the product according to the present invention is effectively prevented in the manufacturing process.

An embodiment of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications will fall within the protection scope of the present invention, as will be apparent to those skilled in the art.

As described above, according to the present invention, the bent portion of the glass tube is formed at a predetermined angle so that the thickness of the bent portion is formed thicker than the body, thereby improving the reliability of the product.

In addition, by simultaneously processing the connection tube formed on both sides to simplify the manufacturing equipment to reduce the productivity and manufacturing cost of the product.

Claims (2)

The first optical glass glass tube and the primary optical glass glass tube having a first connection tube and a secondary connection tube bent at both sides of the annular glass tube body hollow with a constant thickness and diameter to form a primary connection tube and a secondary connection tube. A secondary optical glass glass tube having a tertiary connecting tube and a quaternary connecting tube, and the primary connecting tube and the tertiary connecting tube and the secondary connecting tube and the fourth connecting tube are melt-bonded to form a bellow, respectively. In the bulb for the inductive coupling type electrodeless annular fluorescent lamp having a plurality of exhaust parts for accommodating amalgam in the primary, tertiary connecting tube or the secondary, fourth connecting tube, The bent portion 40, the outermost cross section of the corner perpendicular to the first to fourth connection tube (15, 16, 17, 18) is the inner peripheral portion 43 is circular, the lower half portion 42 of the outer Is a semi-circular shape and the upper half (41) is a sawtooth shape, the cross section orthogonal to the outermost cross section in the upper half (41) is an inductive coupling type electrodeless annular fluorescent lamp, characterized in that formed into a rhombus toward the corner. The primary light-transporting glass tube and the bend formed with the primary connection tube and the secondary connection tube bent at both ends by cutting the annular glass tube hollowed to a certain thickness and diameter to a certain length and heating the bent portion of the cut glass tube. The secondary light transfer glass tube is formed to form a third connection tube and a fourth connection tube, and the ends of the primary connection tube and the fourth connection tube of the formed primary optical movement glass tube and the secondary optical movement glass tube. By coating the phosphor on the inner surface by grinding, and forming the exhaust portion in which the amalgam is accommodated on one side of the primary or secondary connection tube and the secondary or quaternary connection tube of the primary light-transporting glass tube and the secondary light-moving glass tube. The primary light-transfer glass tube and the secondary light-transport glass tube in which the exhaust part is formed are melt-bonded to the primary connection tube, the tertiary connection tube, and the secondary connection tube and the fourth connection tube, respectively, to form a bellow. Square frame In the method of inductively coupled electrodeless bulb for the annular fluorescent lamp formed onto, The primary light transfer glass tube and the secondary light transfer glass tube before the phosphor coating, The bent portion is the outermost cross-section of the corner perpendicular to the first to fourth connection tube, the inner peripheral portion is circular, the lower half of the outer half is semicircular, the upper half is sawtooth-shaped, the cross section orthogonal to the outermost cross section in the upper half The mold seating step of seating on the mold formed in a rhombus shape toward the edge portion, A thickness shaping step of forming a mold by supplying air of a predetermined pressure uniformly in the thickness of the primary light-moving glass tube seated on the mold; The method of manufacturing a bulb for an inductively coupled electrodeless annular fluorescent lamp characterized in that it further comprises a slow cooling step of slowly cooling the molded primary light-transporting glass tube.

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