JP2007273226A - Compact self-ballasted fluorescent lamp, luminaire, and manufacturing method of compact self-ballasted fluorescent lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small and compact self-ballasted fluorescent lamp of which the outside dimension is almost the same as that of a general incandescent bulb, to provide a luminaire, and to provide its manufacturing method. <P>SOLUTION: This compact self-ballasted fluorescent lamp is provided with: a fluorescent lamp 20 having an arc tube 21 where the width on the side of a sealing part 25 is smaller than the maximum width in the vicinity of an intermediate part, a phosphor layer on the inside surface of the arc tube 21, and an electrode means capable of energizing a filled discharge medium and a discharge passage; a globe 10 made of glass, and having a nearly-spherical part 12 formed by heating and closing, with the fluorescent lamp 20 housed in the inside, the other end side of an opened cylindrical bulb 15 having an opening 11 reduced in diameter, and having an intermediate part bulged relative to one end side; and a cover body 13 supporting a base 30, the fluorescent lamp 20 and a globe 10 covering the fluorescent lamp 20, and housing a lighting device 41. Since the nearly-spherical part 12 is formed by closing the other end side of the cylindrical bulb 15 with the fluorescent lamp 20 housed therein, heat in closing the cylindrical bulb 15 is prevented from influencing sealing parts of lead wires, thin tubes and the like of sealed parts 25, and thermal degradation of used members of the arc tube 21 can be suppressed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a bulb-type fluorescent lamp having a globe that covers a fluorescent lamp, and a method of manufacturing the bulb-type fluorescent lamp.

  There is a known bulb-type fluorescent lamp that has a cover body that has a base that can be attached to a socket for a general lighting bulb, and that houses a lighting device inside the cover body and that is bent into a globe by bending the arc tube. Yes.

  In recent years, fluorescent lamps, which are light-emitting tubes, have become smaller and more efficient due to electronic circuits of lighting devices and improvements in processing technology. The incandescent bulb has a size equivalent to 60W, but has high light output, high efficiency, and long life. A bulb-type fluorescent lamp having features is known (see, for example, Patent Document 1).

  As described above, the light bulb-type fluorescent lamp has been miniaturized to the extent that it is approximately approximate to the external dimensions of a 60W type incandescent bulb. However, since it is still larger than the external dimensions of a general incandescent light bulb, it can be replaced with a general lighting bulb. It is not perfect and further miniaturization is desired.

  Accordingly, a bulb-type fluorescent lamp having a so-called PS (pear shape) globe in which the tip side, which is a characteristic bulb shape of an incandescent bulb, has a substantially spherical shape and a diameter near the base is reduced is known (for example, Patent Document 2).

The bulb-type fluorescent lamp of Patent Document 2 is provided with a PS-shaped globe having approximately the same size and shape as an incandescent bulb, and has an incandescent bulb silhouette. Since it can be almost attached to the mounted lighting fixture, it greatly contributes to the popularization of the bulb-type fluorescent lamp.
JP 2000-21351 A JP 2005-108699 A

  The bulb-type fluorescent lamp of Patent Document 2 has a spiral arc tube that forms a contour along the inner surface of a PS-shaped globe in order to increase the discharge path length. The width dimension is formed so as to be smaller than the width dimension of the intermediate portion where the spiral diameter is maximum. The PS-shaped globe that covers the arc tube is formed by heating and contracting one end of the cylindrical bulb in a state where the arc tube is accommodated in the cylindrical bulb. That is, a state where the other end side is closed in a substantially spherical shape in advance and a cylindrical bulb having one end side opened with the same diameter as the intermediate portion is covered from the other end side of the arc tube, and the arc tube is accommodated in the cylindrical bulb A PS-shaped glove is formed by heating and shrinking one end of the cylindrical bulb.

  However, if one end side is heated and shrunk while the arc tube is housed inside the cylindrical bulb, the electrode member sealing portion, the arc tube support member, etc. provided on the one end side of the arc tube are heated and heated. May deteriorate.

  In addition, since the opening of the glove formed by shrinking one end of the cylindrical valve is a part that is attached to the cover body or the base side, it has high precision so that it has a predetermined size to facilitate attachment work. Need to be processed. However, it is difficult to accurately process the opening in a state where the arc tube is accommodated inside the cylindrical bulb.

  The present invention has been made in view of the above problems, and an object thereof is to provide a small bulb-type fluorescent lamp, a lighting fixture, and a method for manufacturing the bulb-type fluorescent lamp that are substantially the same as the external dimensions of a general incandescent bulb. To do.

  The bulb-type fluorescent lamp of the present invention has a light emitting tube formed so that a width dimension on one end side provided with a sealing portion becomes smaller than a maximum width dimension from the other end side to the intermediate portion, and the inner surface of the arc tube A fluorescent lamp having a phosphor layer formed therein, a discharge medium sealed in the arc tube, and electrode means provided so as to be able to generate a single discharge path bent in the arc tube; The other end side is heated and closed in a state where the fluorescent lamp is housed in the other end side of the cylindrical bulb in which the intermediate portion is bulging from the one end side and the other end side is open. A glass globe in which a substantially spherical portion is formed; a base is provided on one end side, and the fluorescent lamp and the globe in a state of covering the fluorescent lamp are supported on the other end side, and the fluorescent lamp is disposed inside Accommodates lighting device to light Characterized in that it comprises a; and a cover body are.

  The arc tube of the fluorescent lamp has a sealing part formed on one end side, and has an external shape such that the width dimension on one end side becomes smaller than the maximum width dimension from the other end side to the intermediate part. The specific structure is not limited. As a structure of such an arc tube, for example, a plurality of tube parts in which a substantially central part of a straight tubular glass bulb is heated to be bent in a U-shape and a middle part of the U-tube bulb is further formed into a curved shape or an arc shape. Examples include a combined structure and a spirally formed structure. The width dimension of the arc tube means a width dimension in a direction substantially orthogonal to an axis connecting the base and the top of the globe in a state where the arc tube is accommodated in the globe and the base is covered.

  The electrode means is generally one in which electrodes are sealed at both end positions of a discharge path formed in the arc tube, but it may be a so-called electrodeless type having no pair of electrodes. Examples of the electrode include a hot cathode made of a filament, a ceramic electrode carrying an electron emitting material, and a cold cathode made of nickel or molybdenum.

  The globe covering the fluorescent lamp preferably has substantially the same shape as the silhouette of a general incandescent bulb, but it may have any shape as long as the opening on one end side is reduced in diameter and the middle portion bulges from the one end side. .

  The cover body has a structure for supporting the globe, but the base of the cover body may be connected so as to support the globe. In addition, if the entire cover body is arranged inside the globe or base so that the cover body cannot be seen from the outside, and only the base and the globe can be seen from the outside, general incandescence will appear. The same bulb-type fluorescent lamp as the bulb can be obtained.

  The lighting device for lighting the fluorescent lamp may be accommodated in the globe or may be accommodated in the base and fixed. The connection between the fluorescent lamp and the lighting device is generally a structure in which the lead wire derived from the electrode means is connected to the connection pin mounted on the circuit board constituting the lighting device, but the lead wire derived from the lighting device and You may connect by twisting the lead wire derived | led-out from the electrode means, and the connection method is not specifically limited.

  The lighting fixture of the present invention is characterized by comprising the above-described bulb-type fluorescent lamp; and a fixture main body on which the bulb-type fluorescent lamp is mounted.

  The manufacturing method of the light bulb-type fluorescent lamp of the present invention, the one end side of the fluorescent lamp having an arc tube formed so that the width dimension on one end side becomes smaller than the maximum width dimension from the other end side to the middle part, The opening on one end is reduced in diameter, the middle is bulging from one end, and the other end is inserted from the other end of the cylindrical bulb. The fluorescent lamp is housed inside this cylindrical bulb. In this state, the other end side of the cylindrical bulb is heated and closed to form a glass globe so as to form a substantially spherical portion.

  According to the bulb-type fluorescent lamp and the manufacturing method thereof of the present invention, the other end in a state where the fluorescent lamp is accommodated from the other end side of the cylindrical bulb in which the opening on one end side is reduced in diameter and the other end side is opened. Since the side is closed to form a substantially spherical portion, it becomes possible to approximate the external shape of a general incandescent bulb, and there is no arc tube sealing portion on the other end side of the globe, There is no possibility that the heat when closing the cylindrical bulb affects the sealing portion of the arc tube, and the thermal deterioration of the member used can be suppressed. Moreover, since the opening part at the one end side of the cylindrical valve is formed in advance in the cylindrical valve with high accuracy, the glove mounting operation is not limited.

  Hereinafter, an embodiment of a light bulb shaped fluorescent lamp of the present invention will be described with reference to the drawings.

  FIG. 1 is a side sectional view of a bulb-type fluorescent lamp according to a first embodiment of the present invention. The globe 10 of the bulb-type fluorescent lamp is made of a glass material, has an opening 11 on one end side, expands toward the other end, and bulges out so that the intermediate portion has the maximum outer diameter. The other end side top is formed in a rotating body having a PS shape so as to be substantially spherical.

  Reference numeral 13 denotes a cover body made of PBT resin, which has an opening edge portion slightly larger than the outer diameter of the opening portion 11 of the globe 10 on the other end side, and has a substantially cylindrical shape that expands toward the other end side. Is formed. The other end side of the cover body 13 supports one end portion side of a fluorescent lamp 21 described later by a support member (not shown), and the opening portion 11 of the globe 10 covering the fluorescent lamp 12 is attached to the opening edge portion. . On one end side of the cover body 13 is formed a cylindrical projection 14 having a thread formed on the outer peripheral surface thereof, and a cap 30 is screwed onto the cylindrical projection 14 to be crowned. The base shell portion constituting the base 30 is formed by, for example, forming a conductive metal such as brass or copper into a cylindrical shape.

  Hereinafter, the base 30 side will be described as one end side (upper side in FIG. 1), and the top side of the globe 10 will be described as the other end side (lower side in FIG. 1).

  The fluorescent lamp 20 has an arc tube 21 having a double spiral structure. The arc tube 21 is formed in a spiral shape with the central portion in the longitudinal direction of the straight tube bulb as a top 23, and a pair of straight portions 22 located on one end side of the arc tube 21 has a longitudinal direction that is the central axis of the fluorescent lamp 20. They are arranged side by side so as to be substantially parallel. The maximum width of the pair of linear portions 22 of the arc tube 21 is smaller than the maximum diameter located at the intermediate portion of the arc tube 21, and spirals so that the diameter decreases from the intermediate portion toward the top portion 23 located on the other end side. It is formed in a shape. The arc tube 21 having such a shape forms a discharge path curved along the inner surface of the PS-shaped globe 10 and becomes the arc tube 21 having the maximum discharge path length. The lamp efficiency can be made higher than that of a conventional arc tube that is substantially the same as the inner diameter of 11.

  The arc tube 21 has, for example, a tube outer diameter of 6 to 13 mm, about 7 mm in the present embodiment, a tube inner diameter of 5.5 to 11.5 mm, about 6 mm in the present embodiment, and a discharge path formed to about 400 mm. Has been. The arc tube 21 is preferably made of glass, but may be formed of a light-transmitting material such as ceramics.

  A phosphor layer is applied directly or indirectly to the inner surface of the arc tube 21. Examples of the phosphor layer include, but are not limited to, rare earth metal oxide phosphors and halophosphate phosphors. However, in order to improve luminous efficiency, it is preferable to use a three-wavelength emission type phosphor in which phosphors emitting red, blue and green light are mixed.

  A discharge medium is enclosed in the arc tube 21. The discharge medium is made of an inert gas such as argon, neon, krypton, or xenon and mercury.

  A pair of linear portions 22 positioned at both ends of the discharge path formed in the arc tube 21 are provided with sealing portions 25 for sealing a pair of electrodes 24 connected to a lighting device 41 described later. Yes. A lead wire is led out from the sealing portion 25.

  A lighting device 41 for lighting the fluorescent lamp 20 includes a disk-like circuit board 41a orthogonal to the longitudinal direction of the arc tube 21, and electronic components 42 mounted on both surfaces of the circuit board 41a. An inverter circuit for lighting the lamp 20 at a high frequency is configured. The circuit board 41 has substantially the same diameter as the inner diameter of the opening 11 of the globe 10, and is fixed to the cover body 13 or the inner peripheral edge near the opening 11 by fixing means (not shown). The input end of the high-frequency lighting circuit composed of these components is electrically connected to the base 30 side. In the present embodiment, the lead wires connected to the pair of electrodes 24 are directly mounted on the lighting device 41, but by twisting the lead wires respectively derived from the lighting device 40 side and the fluorescent lamp 20 Electrical connection may be made. Further, as long as it is possible to stand a wrapping pin on the circuit board 41a, a method of winding and connecting a lead wire led out from the fluorescent lamp 21 may be used.

  Next, the assembly process of the bulb-type fluorescent lamp of this embodiment will be described with reference to FIG.

  First, as shown in FIG. 2 (a), a glass cylinder having an opening 11 with a reduced diameter on one end side, a middle portion bulging from the opening 11 and an opening on the other end side. A cylindrical valve 15 is prepared. The cylindrical bulb 15 has a light diffusion layer formed in advance on the inner surface. Then, one end side of the fluorescent lamp 20 is inserted from the other end side opening of the cylindrical bulb 15, and the fluorescent lamp 20 is accommodated so that the one end side of the arc tube 21 is positioned in the opening 11 of the cylindrical bulb 15. On the other hand, the lighting device 41 is accommodated in the cover body 13, and the base 30 is attached to the cylindrical protrusion 14.

  Next, as shown in FIG. 2B, a predetermined outer surface portion on the other end side of the cylindrical valve 15 is heated by the burners 50 and 50 to be softened. Then, as shown in FIG. 2 (c), the tip 16 on the other end side of the cylindrical valve 15 is pulled in a direction away from the one end side, and the cylindrical valve 15 is melted and closed to process the globe 10. Mold. At this time, a substantially spherical portion 12 may be formed by applying a mold for molding to the other end of the globe 10 and increasing the internal pressure of the globe 10 to perform blow molding. Inside the globe 10 formed in this way, an arc tube 21 having a spiral bulb larger in diameter than the opening 11 is accommodated. Then, the fluorescent lamp 20 is electrically connected to the lighting device 41, and the fluorescent lamp 20 and the globe 10 are attached to the cover body 13 to complete the bulb-type fluorescent lamp.

  FIG. 3 is a process diagram showing an assembly process of the bulb-type fluorescent lamp of the second embodiment. In FIG. 3, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the present embodiment, the arc tube 21 ′ is formed by connecting a plurality of U-tube bulbs that are bent in a U-shape by heating the substantially central portion of the straight glass bulb and further having a curved or arcuate shape. Configured. This arc tube 21 ′ has a shape in which the middle part of the U-shaped bulb is formed in a curved shape or an arc shape so that the middle part having the maximum width dimension bulges in the outer circumferential direction. A curved discharge path is formed along the inner surface of the PS-shaped globe 10. Therefore, since the arc tube 21 'has a discharge path length as large as possible as in the first embodiment, the lamp efficiency is higher than that of a conventional arc tube whose maximum width is almost the same as the inner diameter of the opening 11 of the globe 10. Can be high. In addition, a slight gap is formed between the intermediate portions of the U-tube bulbs adjacent to each other by forming a curved shape or an arc shape, and the central axis of the arc tube 21 ′ is formed by this gap. Since the light from the U-shaped tube bulbs facing each other is easily transmitted, there is an advantage that the total luminous flux value of the arc tube 21 ′ is improved. Although the sealing portion of the arc tube 21 ′ is not shown in FIG. 3, the sealing portion of the arc tube 21 ′ is an electrode sealing end portion on one end side of the arc tube 21 ′ as in the first embodiment. Are provided by means such as a stem seal or a pinch seal, and lead wires connected to the electrodes are led out from the sealing portion.

  As shown in FIG. 3A, one end side of the arc tube 21 ′ of the present embodiment is held by a holder 26 made of a heat-resistant member, and this holder 26 is opened from the other end side opening of the cylindrical bulb 15. The fluorescent lamp 20 is housed so that one end side of the arc tube 21 ′ is positioned in the opening 11 of the cylindrical bulb 15. Thereafter, as shown in FIGS. 3B and 3C, a light bulb shaped fluorescent lamp is completed through the same steps as in the first embodiment.

  According to the bulb-type fluorescent lamp of each of the above embodiments, the fluorescent lamp 20 is accommodated from the other end side of the cylindrical bulb 15 in which the opening 11 on one end side is reduced in diameter and the other end side is open. Since the substantially spherical portion 12 is formed by closing the other end of the cylindrical bulb 15, the bulb-type fluorescent lamp can be brought close to the external shape of a general incandescent bulb. In addition, since the sealing portion 25 of the arc tube 21 does not exist on the other end side of the globe 10, the heat when closing the cylindrical bulb 15 affects the lead wire sealing portion or the thin tube of the sealing portion 25. It is possible to prevent the members used in the arc tube 21, 21 'from being thermally deteriorated. In addition, since the opening 11 on the one end side of the cylindrical valve 15 is processed and molded in advance with high accuracy, there is no problem in the mounting operation of the globe 10 due to the dimensional deviation of the opening 11.

1 is a side sectional view showing a light bulb shaped fluorescent lamp according to a first embodiment of the present invention. FIG. 2 is a process diagram showing an assembly process of the bulb-type fluorescent lamp of FIG. Process drawing which shows the assembly process of the lightbulb-type fluorescent lamp of the 2nd Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Globe, 11 ... Opening part, 12 ... About spherical part, 13 ... Cover body, 20 ... Fluorescent lamp, 21 ... Light-emitting tube, 24 ... Electrode means, 25 ... Sealing part, 30 ... Base, 40 ... Lighting device.

Claims (3)

An arc tube formed so that the width dimension on one end side provided with the sealing portion is smaller than the maximum width dimension from the other end side to the intermediate portion, the phosphor layer formed on the inner surface of the arc tube, light emission A fluorescent lamp having a discharge medium enclosed in a tube and electrode means provided so as to be able to generate one bent discharge path in the arc tube;
One end side of the opening is reduced in diameter, the middle part bulges from the one end side, and the other end of the cylindrical bulb that is open at the other end is heated in a state where the fluorescent lamp is housed inside. A glass globe in which a substantially spherical portion is formed on the other end side by closing and closing;
A cover body that is provided with a base on one end side and that supports the fluorescent lamp and the globe in a state of covering the fluorescent lamp on the other end side, and houses a lighting device that lights the fluorescent lamp inside;
A bulb-type fluorescent lamp characterized by comprising: A bulb-type fluorescent lamp according to claim 1;
An instrument body equipped with this bulb-type fluorescent lamp;
The lighting fixture characterized by comprising.   One end side of the fluorescent lamp having the arc tube formed so that the width dimension on one end side becomes smaller than the maximum width dimension from the other end side to the middle part, the opening on one end side is reduced in diameter, and the middle part Is inserted from the other end of the cylindrical bulb that is open at the other end, and the other end of the cylindrical bulb is placed in a state where the fluorescent lamp is accommodated inside the cylindrical bulb. A method for manufacturing a bulb-type fluorescent lamp, comprising a step of processing a glass globe so as to be closed by heating to form a substantially spherical portion.

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