JP2010009884A - Plane spiral type fluorescent lamp and luminaire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plane spiral type fluorescent lamp capable of improving luminous efficiency. <P>SOLUTION: A support member 25 which supports an arc tube 22 does not hold the ends 22b of the arc tube 22 having a filament 24, so that the support member 25 has little effect of temperature rise due to heat generation of the ends 22b of the arc tube 22. Thereby, rising of temperature of the coldest spot (22a) through the support member 25 can be avoided and the luminous efficiency can be improved. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a flat spiral fluorescent lamp having an arc tube having a flat spiral shape and a lighting fixture using the flat spiral fluorescent lamp.

Conventionally, in a spiral fluorescent lamp, a holding member for holding the arc tube is provided in order to prevent the arc tube from being damaged when the lamp is attached and detached (see, for example, Patent Documents 1 and 2).
As shown in FIG. 3, in the spiral fluorescent lamp 100 described in Patent Document 1, the arc tube 101 is formed by winding a single glass tube in a spiral shape with a decreasing radius toward the center of the circle. ing. Accordingly, in one spiral fluorescent lamp 100, the base 102 and the lamp pin 103 are provided on the center side, and the connection socket 104 is provided on the outermost side. A disc-shaped substrate 105 that covers the entire arc tube 101 is provided on the back side of the arc tube 101, and a holding member 106 that holds the arc tube 101 is provided on the disc-shaped substrate 105.

As shown in FIGS. 4A and 4B, in the helical fluorescent lamp 110 described in Patent Document 2, a series of bent arc tubes 111 are arranged on a substantially flat surface with the tube center portion 112 as a center. It has a double spiral shape swirled in a spiral shape. A base 114 is provided at each of both end portions that are substantially opposed to each other, that is, the tube end portions 113a and 113b, and a pair of lamp pins 115 are provided so as to protrude from each base 114. Further, a bridge 116 as a holding member is provided between the pipe end portions 113a and 113b.
Japanese Patent Laid-Open No. 2003-17000 (FIG. 1) JP 2007-273336 A (FIG. 2)

  However, in the spiral fluorescent lamp 100 described in Patent Document 1, although the holding member 106 can avoid holding the end portion where the temperature is high, the entire arc tube 101 is a disc-shaped substrate. Since the cover 105 is covered with the heat, the heat generated by the arc tube 101 is confined to the whole, resulting in a disadvantage that the luminous efficiency is lowered. Further, in the helical fluorescent lamp 110 described in Patent Document 2, since the tube end portions 113a and 113b that generate heat and the tube center portion 112 that is the coldest point are connected by the bridge 116, the tube end portion 113a. , 113b is transferred, the temperature of the coldest point rises, and the luminous efficiency decreases.

  The present invention has been made to solve the conventional problems, and an object thereof is to provide a flat spiral fluorescent lamp capable of improving the luminous efficiency and a lighting apparatus using the flat spiral fluorescent lamp. .

  The flat spiral fluorescent lamp of the present invention is a flat spiral fluorescent lamp having an arc tube having a flat spiral shape, and a holding member for holding the arc tube is located at a place other than an end portion having a filament of the arc tube. It has the structure which was made to hold | grip.

  With this configuration, since the holding member that holds the arc tube does not grip the end of the arc tube having the filament, the holding member is less affected by temperature rise due to heat generation at the end of the arc tube. For this reason, since it can avoid that the temperature of the coldest point rises via a holding member, luminous efficiency can be improved.

  Further, the flat spiral fluorescent lamp of the present invention has a configuration in which the holding member is arranged on a straight line orthogonal to a straight line connecting the caps at both ends of the arc tube.

  With this configuration, the holding member is provided in a direction orthogonal to a straight line connecting the caps at both ends of the arc tube, and therefore, the holding member is disposed at a position farthest from both ends of the arc tube. For this reason, the influence by the heat_generation | fever of the edge part of an arc_tube | light_emitting_tube can be made the smallest.

  Furthermore, the lighting fixture of this invention has the structure using the planar helical fluorescent lamp mentioned above.

  With this configuration, in the flat spiral fluorescent lamp, the holding member that holds the arc tube does not grip the end of the arc tube having the filament, so the holding member is less affected by temperature rise due to heat generation at the end of the arc tube. Become. For this reason, since it can avoid that the temperature of the coldest point rises via a holding member, luminous efficiency can be improved.

  In the present invention, since the holding member that holds the arc tube does not grip the end portion of the arc tube having the filament, the holding member is less affected by the temperature rise due to heat generation at the end portion of the arc tube. For this reason, since it can avoid that the temperature of the coldest point rises via a holding member, the flat spiral fluorescent lamp which has the effect that luminous efficiency can be improved can be provided.

Hereinafter, embodiments of a lighting apparatus according to the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing a lighting fixture according to the first embodiment of the present invention, and FIG. 2 is a perspective view of the flat spiral fluorescent lamp according to the embodiment of the present invention as seen from the fixture main body side.

  As shown in FIG. 1, a lighting device 10 according to the present invention is used by being fixed to a wall surface 11 such as a ceiling or a wall. For example, a rectangular box-shaped device body 12 and a front opening of the device body 12 are provided. A panel 13 made of a transparent or translucent resin or the like is provided. An electrical component such as a lighting device 14 connected to a commercial AC power source (not shown) is attached to the bottom plate 12a of the appliance main body 12 near one end 22b, and covers the lighting device 14 and the panel 13. A mounting plate 15 is provided for mounting. The panel 13 is detachably attached by screwing the screw 13a into the screw hole 15a of the attachment plate 15 and tightening.

  Further, a reflecting plate 16 is provided from the central portion and the other end portion 22b of the bottom plate 12 to reflect the illumination light of the flat spiral fluorescent lamp 20 as a fluorescent lamp toward the panel 13 and improve the illumination efficiency. A pair of lamp sockets 17 and 17 for mounting the flat spiral fluorescent lamp 20 is attached to the upper surface of the reflection plate 16. These lamp sockets 17 and 17 are connected to the lighting device 14 by power lines (not shown). The flat spiral fluorescent lamp 20 is held on the upper surface of the reflection plate 16, which is the surface facing the flat spiral fluorescent lamp 20 in the instrument body 12, when the flat spiral fluorescent lamp 20 is attached to the lamp socket 17. A lamp support spring 18 is provided.

  As shown in FIG. 2, the flat spiral fluorescent lamp 20 has an arc tube 22 in which a tubular discharge path is swirled in a double spiral shape along the same plane starting from the longitudinal central portion 22a. The central portion 22a of the arc tube 22 has a larger diameter than the other portions and is the coldest point. Bases 23 and 23 are respectively attached to both end portions 22 b of the arc tube 22, and both the caps 23 and 23 are provided at point-symmetrical positions with respect to the central portion 22 a of the arc tube 22. Each of the caps 23, 23 is provided with a pair of lamp pins 21 projecting at one end along the axial direction of the arc tube 22 in a direction perpendicular to the plane of the flat spiral fluorescent lamp 20, and the other end of the arc tube 22. Is connected to the filament 24 provided at the inner end 22b of the.

  On the side surface opposite to the coldest spot (22a) in the arc tube 22 (upper side surface in FIG. 2B), a bridge 25, which is a holding member that connects the outermost circumferences of the arc tube 22, is provided. At both ends of the bridge 25, ring-shaped holding portions 25 a for holding the arc tube 22 are provided, and are arranged so as to grip places other than the end portion 22 b having the filament 24 of the arc tube 22. . For example, it is desirable to provide the bridge 25 in a direction orthogonal to the straight line L1 connecting both the caps 23 and 23.

  As described above, according to the planar spiral fluorescent lamp 20 and the lighting fixture 10 using the planar spiral fluorescent lamp 20 according to the embodiment of the present invention described above, the bridge 25 holding the arc tube 22 has the filament 24. Since the end portion 22 b of the tube 22 is not gripped, the bridge 25 is less affected by the temperature rise caused by the heat generated at the end portion 22 b of the arc tube 22 by the filament 24. For this reason, since it can avoid that the temperature of the coldest point (22a) rises via the bridge | bridging 25, luminous efficiency can be improved.

  In particular, by providing the bridge 25 in a direction orthogonal to the straight line L1 connecting the caps 23 at both ends of the arc tube 22, the bridge 25 is disposed at a position farthest from the both ends 22b of the arc tube 22, The influence of heat generation at the end 22b of the arc tube 22 can be minimized.

The flat spiral fluorescent lamp of the present invention is not limited to the above-described embodiment, and appropriate modifications and improvements can be made.
For example, in each embodiment mentioned above, although the rectangular box-shaped instrument main body 12 was illustrated, it is not restricted to this, For example, it can apply also to circular box shape etc.

The perspective view which shows the lighting fixture concerning embodiment of this invention (A) is the perspective view seen from the instrument main body side of the flat spiral fluorescent lamp concerning embodiment of this invention, (B) is sectional drawing of the BB position in (A). Plan view showing a conventional fluorescent lamp (A) is a top view which shows the conventional fluorescent lamp, (B) is sectional drawing.

Explanation of symbols

20 flat spiral fluorescent lamp 22 arc tube 22b end 23 base 24 filament 25 bridge (holding member)

Claims (3)

A flat helical fluorescent lamp having a flat spiral shaped arc tube,
A flat spiral fluorescent lamp characterized in that a holding member for holding the arc tube grips a place other than an end portion having a filament of the arc tube.   2. The flat spiral fluorescent lamp according to claim 1, wherein the holding member is arranged on a straight line orthogonal to a straight line connecting the caps at both ends of the arc tube.   A luminaire using the flat spiral fluorescent lamp according to claim 1.

Images