JP2010086707A - Compact self-ballasted fluorescent lamp and illuminating device - Google Patents

Abstract

An object of the present invention is to provide a bulb-type fluorescent lamp and an illuminating device that can improve luminous flux rise characteristics and luminous efficiency and can be further miniaturized.
Since the spiral portion 4e is formed up to the end of the arc tube 4, the discharge path length can be increased. Therefore, the luminous flux in the spiral portion 4e is increased and the luminous efficiency is improved. In addition, the entire bulb including the bulb end is formed in a spiral shape, but the line connecting the pair of electrode sealing ends 4a and 4b of the glass bulb and the swivel axis ○ are orthogonal to each other. The thin tube can be extended to the base side without bending.
[Selection] Figure 1

Description

  The present invention relates to a bulb-type fluorescent lamp and an illumination device including the bulb-type fluorescent lamp.

  Conventionally, this type of light bulb-type fluorescent lamp has been miniaturized to a size close to that of a general light bulb defined in JIS, and has an appearance similar to that of a general light bulb.

  This type of bulb-type fluorescent lamp includes a light-emitting tube having a bent bulb, a cover that attaches a base to one end of a cover body and supports the light-emitting tube at the other end, a lighting device that is accommodated in the cover, and a light-emitting tube. A glove or the like that is covered and attached to the other end of the cover is provided.

In recent years, the shape of a bent bulb disposed in a narrow space in a globe is different from a linear shape or a spiral shape in its end portion, but the discharge path length is increased by forming it in a spiral shape. Have been proposed (see, for example, Patent Documents 1 and 2).
JP 2008-27850 A JP 2004-265735 A

  However, a bulb-type fluorescent lamp with a bulb end having a straight bulb end has a short discharge path and a high luminous efficiency when the height direction is the same as that of the spiral arc tube up to the bulb end. descend.

  On the other hand, a bulb-type fluorescent lamp with a spiral arc tube up to the bulb end is suitable for downsizing, but in order to improve the luminous flux rise characteristic, a part of the narrow tube sealed to the bulb end is on the base side. In order to extend the tube, it is necessary to bend the thin tube from the end of the swiveled valve, which is difficult to manufacture.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a light bulb-type fluorescent lamp and an illumination device that can improve luminous flux rise characteristics and luminous efficiency and can be further miniaturized. To do.

  The bulb-type fluorescent lamp according to claim 1 is a cover having a cap on one end side of the cover body and having a mounting end on the other end side; It has a valve formed in a heavy spiral shape, and a pair of electrodes is sealed at both ends of the valve, and at least one end of the both ends of the valve has a thin tube coaxial with the spiral axis And a lighting device accommodated in the cover.

  The bulb formed in a double spiral around the pivot axis from the center to both ends of one discharge path is at substantially the same pitch until reaching the bulb ends located at both ends. It shows that it is turning in the direction of the turning axis so that the external shape becomes substantially cylindrical in the valve end direction. In addition, the substantially cylindrical shape includes those in which the space surrounded by the turning valve is a circle or an ellipse.

  The narrow tube extending in the same direction as the swivel axis is sealed so as to extend from the end of the valve, and is used not only for sealing the main amalgam but also as an exhaust tube. I do not care.

  The narrow tube sealed at the bulb end can be separated from the lighting heat source and extended in the direction of the cap, thereby forming a region of 40 to 70 degrees. Therefore, a mercury alloy close to the vapor pressure characteristic of mercury can be used. In addition, the thin tube extending so as to be coaxial with the swivel axis is not limited to the coaxial with the swivel axis in all straight thin tubes, but most of the thin tubes are straight, but a bent portion is partly provided. You may have.

  The term “extending in the direction of the base” means that the part of the cover body in which the base is provided and the inside of the lighting device housing part of the cover body that extends continuously from the part toward the arc tube side and has a relatively low temperature. A space with only a base is also included.

  Further, as a method of sealing the narrow tube formed protruding from the valve end, a sealing glass member such as a flare stem may be used, or a crushing sealing method may be used by heating and melting the valve end. .

The cover body is attached with a base, and is provided with an attachment end portion for indicating a fluorescent lamp at the other end to which the base is attached, and an accommodation portion having an accommodation space for the lighting device is formed therein. The attachment end portion is allowed as long as the valve end portion spirally swiveled can be inserted.
As the base, a screw-in type called an E-type for an incandescent lamp is usually used, but it is not limited to this.

  The lighting device is an inverter system composed of a plurality of electronic components such as an electrolytic capacitor and a choke coil, and these electronic components are mounted on a substrate and accommodated in a cover body. Note that the substrate of the lighting device may be arranged vertically so as to be coaxial with the turning axis of the arc tube, or may be arranged horizontally so as to be orthogonal to the turning axis.

  Further, it may have a glove that covers the arc tube, and the shape is preferably substantially the same as the silhouette of a general incandescent bulb, but it may be spherical or cylindrical. Further, the material such as glass or resin on which a light diffusion film is formed is not limited.

The bulb-type fluorescent lamp according to claim 2, further comprising: a bulb-sealed end portion having a spirally formed bulb that turns around a turning shaft from a central portion of the discharge path to a bulb end portion and enclosing a pair of electrodes. A light emitting tube having a bulb end sealed so that the surface formed by the tube is substantially perpendicular to the pivot axis, and a capillary tube sealed in the direction of the cap substantially parallel to the pivot axis; and a cap at one end of the cover body The other end includes a cover having a holding portion for holding the arc tube; and a lighting device housed in the cover.
According to a third aspect of the present invention, there is provided an illumination device comprising: the light bulb shaped fluorescent lamp according to the first or second aspect; and a fixture main body to which the light bulb shaped fluorescent lamp is attached.

  According to the bulb-type fluorescent lamp of claim 1, since the bulb having a single discharge path has a bulb formed in a double spiral around the pivot axis, the discharge path can be reduced in size. A long length can be secured, and since the narrow tube is sealed so as to be coaxial with the axis of the spiral valve, the straight tubular tube can be extended to the base side. Therefore, it is possible to easily manufacture a bulb-type fluorescent lamp having a good luminous flux rise characteristic.

  According to the light bulb shaped fluorescent lamp of the second aspect, the discharge path length can be formed relatively long while downsizing by adopting a spiral shape that revolves around the revolving shaft to the bulb end. Further, since the pair of bulb ends are sealed in a direction substantially perpendicular to the pivot axis of the spiral arc tube, the cap tube sealed at the bulb end is connected to the base substantially parallel to the pivot axis of the spiral bulb. It can extend linearly to the side space. Therefore, with ease of manufacture. It is possible to provide a bulb-type fluorescent lamp having a good luminous flux rise characteristic.

  According to the light bulb shaped fluorescent lamp according to claim 3, since the light bulb shaped fluorescent lamp according to claim 1 or 2 is provided, it is possible to provide an illuminating device having the effects of these light bulb shaped fluorescent lamps.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected to the same or equivalent part in several attached drawing.
FIG. 1 is a front view showing a part of a light bulb shaped fluorescent lamp and a lighting device according to a first embodiment of the present invention in a longitudinal section, and FIG. 2 is a side view of the arc tube shown in FIG.

  As shown in FIG. 1, a bulb-type fluorescent lamp 1 has a cover 3 having a base 2 at one end (lower end in FIG. 1) in the height direction (tube axis direction), and the other end (upper end in FIG. 1). The arc tube 4 supported on the side, the holder 5 attached to the cover 3 supporting one end side of the arc tube 4, the arc tube 4 is covered and the periphery of the holder 5 is also covered on one end side and attached to the cover 3. A lighting device 7 housed inside the globe 6, the base 2 and the cover 3 is provided. The bulb-type fluorescent lamp 1 has a size and appearance close to those of a general lighting bulb defined in JIS C 7501 such as incandescent bulbs with rated power of 40 W type, 60 W type, and 100 W type, for example.

  The base 2 is an Edison type E26 type or the like, and includes a cylindrical shell 2a having a thread and an eyelet 2c provided on the top of one end of the shell 2a via an insulating portion 2b. The other end side of the shell 2 a is covered with one end portion of the cover 3 and fixed by an adhesive or caulking.

  The cover 3 has a cover body 3a in which an inverted frustoconical portion and a cylindrical portion that are gradually reduced in diameter toward the lower side in FIG. 1 by a heat-resistant synthetic resin such as polybutylene terephthalate (PBT) are integrally coupled. The shell 2a of the base 2 is attached to one end (lower end in FIG. 1) of the cover body 3a, and an annular opening as an attachment end is attached to the other end side (upper end side in FIG. 1) of the cover body 3a. A mounting end 3b is formed.

  In this attachment end 3b, the lower cylindrical opening end of the holder 5 is placed and fixed on the annular convex step portion 3c inside the connecting portion between the truncated cone portion and the cylindrical portion of the cover body 3a. ing.

  That is, the holder 5 is formed in a covered cylindrical shape with a heat-resistant synthetic resin such as PBT, for example, on the peripheral edge of the lower surface of the disk-shaped substrate portion 5a forming the lid portion, on one end (lower end in FIG. 1) side. A projecting cylindrical cylindrical portion 5b is integrally coupled, and the lower end of the opening in FIG. 1 of the cylindrical portion 5b is fixedly engaged with the convex stepped portion 3c of the cover body 3a.

  The holder 5 protrudes into a gap between the electrode sealing end portions 4a and 4b and a supporting recess for placing and supporting the pair of electrode sealing end portions 4a and 4b of the arc tube 4 on the substrate portion 5a. A cylindrical protrusion 5c that restricts the radial displacement is provided. The substrate portion 5a is formed with insertion holes 5d and 5e on the outside of the cylindrical projection 5c, and the insertion holes 5d and 5e are formed from a pair of electrode sealing end portions 4a and 4b of the arc tube 4, respectively. The thin tubes 4c projecting outward and the outer wires 4d and 4d shown in FIG. 2 are respectively inserted. Note that. The narrow tube 4c sealed by the electrode sealing end 4b extends linearly to the base 2 side.

  The arc tube 4 is formed on the inner surface thereof with a phosphor film made of rare earth metal oxide or the like over almost the entire length, and a pair of electrodes 4i and 4j are sealed at both ends in the axial direction, respectively, The parts 4a and 4b are formed respectively.

That is, as shown in FIG. 2, the spiral portion 4 e reaches one of the electrode sealing ends of the glass bulb, for example, from 4 a to the turn-up portion 4 h which is the top end portion in FIG. It has a double spiral shape having a first turning part and a second turning part that reaches the other electrode sealing end, for example, 4b while turning around the turning axis O from the other end of the folded part 4h. For example, each swivel part has swirled almost twice (the number of turns). Therefore, the spiral portion 4e is formed in a dense pitch portion having a dense spiral pitch, and is formed in a long discharge path portion having a long discharge path. The bulb end is sealed so that the discharge path side of the glass reservoir at the bulb end and the lower surface of the spiral bulb are substantially at the same position by crushing and sealing the extension line in the turning direction in the inclined direction.
As the pair of electrodes 4i and 4j, for example, coil electrodes made of tungsten are used, and are sealed at both ends of the glass bulb by crushing sealing, for example.
As shown in FIG. 2, the line A connecting the pair of electrode sealing ends 4 a and 4 b of the glass bulb and the rotation axis ◯ are formed in a direction substantially orthogonal to each other.

  A discharge medium such as argon or krypton gas is sealed in the glass bulb, and a thin tube 4c communicating with the inside of the pair of electrode sealing end portions 4a and 4b is projected. Mercury or amalgam 8 is accommodated in the thin tube 4c.

  The globe 6 is formed of a material such as transparent or light diffusing glass or synthetic resin into a smooth curved surface that is close to the shape of a glass bulb of a general lighting bulb such as an incandescent bulb. That is, the globe 6 is integrally connected with a substantially cylindrical reduced diameter portion 6b that is gradually reduced in diameter to a smaller diameter than the spherical portion 6a at the lower end in FIG. 1 of the spherical portion 6a formed in a substantially spherical shape. The spherical portion 6 a has a maximum diameter portion 6 c that indicates the maximum diameter of the globe 6. The reduced diameter portion 6b is formed with an opening end 6d at one end (the lower end in FIG. 1) of the globe 6, and the edge of the opening end 6d is fitted inside the opening mounting end 3b of the cover 3. For example, it is bonded and fixed by an adhesive such as silicone resin or epoxy resin.

In the lighting device 7, the vertical substrate 7 a on which the lighting circuit pattern is formed is fitted and fixed in a pair of vertical grooves on the inner surface of the base 2. That is, the base 2 is formed with a pair of longitudinal grooves facing in the diameter direction on the inner surface thereof in the axial direction of the base 2, and both side edges in the width direction of the vertical substrate 7 a are fitted and fixed in the longitudinal grooves. ing. The vertical substrate 7a is configured as a single-sided or double-sided substrate, and a plurality of electronic components 7b, 7b,... That are lighting circuit components such as lead components such as electrolytic capacitors and chip components such as transistors are mounted on the mounting surface. Yes.
According to the light bulb shaped fluorescent lamp 1 configured in this way, it is possible to obtain an approximate appearance of a general lighting bulb.

  In addition, since the spiral portion 4e is formed up to the end of the arc tube 4, the discharge path length can be increased, so that both the increase of luminous flux and the improvement of the light emission efficiency in the spiral portion 4e can be achieved. it can.

  In addition, the entire bulb including the bulb end is formed in a spiral shape, but the line connecting the pair of electrode sealing ends 4a and 4b of the glass bulb and the swivel axis ○ are in a substantially perpendicular relationship, so that the narrow tube Can be extended to the base side without bending.

FIG. 3 is a schematic configuration diagram of the illumination device 11 according to the second embodiment of the present invention. The lighting device 11 is a lighting device such as a downlight, for example, and includes a lighting fixture body 12. A socket 13 and a reflector 14 are attached in the luminaire main body 12, and the base 2 of the bulb-type fluorescent lamp 1 is attached to the socket 13 by screwing.
According to this illuminating device 11, since the high luminous flux and high luminous efficiency spiral portion 4e of the bulb-type fluorescent lamp 1 faces downward in the figure, the illuminance directly below can be improved.

  Further, since the straight portion 4f that increases the luminous flux radiated to the base 2 side of the bulb-type fluorescent lamp 1 is located on the reflector 14 side of the luminaire main body 12 and faces the reflector 14, it is reflected by the reflector 14. The reflected light can be increased.

1 is a front view showing a part of a bulb-type fluorescent lamp according to a first embodiment of the present invention in a longitudinal section. The side view of the arc tube shown in FIG. The schematic block diagram of the illuminating device which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Light bulb-type fluorescent lamp, 2 ... Base, 3 ... Cover, 3a ... Cover main body, 3b ... Opening attachment end part of cover, 4 ... Light emission tube, 4a, 4b ... A pair of electrode sealing end part, thin tube ... 4c, 4h ... turn-up part, 4e ... spiral part of arc tube, electrodes ... 4i, 4j, final swivel part ... 4k, 4l, 5 ... holder, 5a ... substrate part of holder, 5c ... cylindrical support part of holder, 5d, 5e ... Holder mounting hole, 6 ... Globe, 6a ... Open end of globe, 6b ... Diameter reduction part of globe, 7 ... Lighting device, 7a ... Vertical substrate of lighting device, 7b ... Electronic component of lighting device, 11 ... Illumination device, 12 ... luminaire main body.

Claims (3)

A cover having a base on one end side of the cover body and having an attachment end on the other end side;
It has a bulb formed in a double spiral around the pivot axis from the center to both ends of one discharge path, and a pair of electrodes are sealed at both ends of the bulb. An arc tube in which at least one end of the tube has a thin tube extending on the same side as the spiral axis;
A lighting device housed in a cover;
A bulb-type fluorescent lamp characterized by comprising: It has a spirally formed bulb that swivels around the pivot axis from the center of the discharge path to the bulb end, and the surface formed by the bulb sealing end that seals the pair of electrodes is substantially perpendicular to the pivot axis An arc tube having a bulb end sealed in such a manner that a thin tube is sealed in the direction of the base substantially parallel to the pivot axis;
A cover having a base at one end of the cover body and a holding portion for holding the arc tube at the other end;
A lighting device housed in the cover;
A bulb-type fluorescent lamp characterized by comprising: A bulb-type fluorescent lamp according to claim 1 or 2;
An instrument body to which a bulb-type fluorescent lamp is attached;
An illumination device comprising:

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