JP2010009883A - 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 24 which connects both ends 22b of an arc tube 22 has a detour part 25 to go around the tube central part 22a being a coldest spot portion, so that the support member 24 connecting both ends 22b of the arc tube 22 which generate heat and the coldest spot (22a) do not contact. Thereby, the heat of the ends 22b of the arc tube 22 is not transmitted to the coldest spot (22a) through the support member 24, and thus, luminous efficiency is improved by suppressing temperature rise of the coldest spot (22a). <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.

2. Description of the Related Art Conventionally, in a spiral fluorescent lamp used in a lighting fixture, a holding member that holds an 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 Document 1).
As shown in FIG. 4, in the spiral fluorescent lamp 100 described in Patent Document 1, a series of bent arc tubes 101 are swirled in a spiral shape on a substantially single plane with the tube center portion 102 as a center. It has a spiral shape. A bridge 104 as a holding member is provided between both end portions that are substantially opposed to each other, that is, between the tube end portions 103a and 103b. Each of the tube ends 103a and 103b is provided with a filament 105, and a pair of lead wires connected to each filament 105 is guided along the bridge 104 to the center of the bridge 104, and is opposite to the paper surface in FIG. It is connected to a lamp pin (not shown) of a base provided on the side.
JP 2007-87968 (FIG. 1)

  However, in the helical fluorescent lamp 100 described in Patent Document 1, the bridge 104 has tube end portions 133a and 133b that are heated by the heat generated by the filament 105, and a tube center portion 132 that is the coldest point. The bridges 104 are connected. For this reason, the heat of the tube end portions 103a and 103b is transmitted to the tube center portion 132 via the bridge 104, so that the temperature at the coldest point rises and the luminous efficiency is lowered.

  The present invention has been made to solve the conventional problems, and an object of the present invention is to provide a flat spiral fluorescent lamp and a luminaire that can improve luminous efficiency.

  The flat spiral fluorescent lamp of the present invention is a flat spiral fluorescent lamp having a double spiral shape in which a series of bent arc tubes are swirled in a spiral on a substantially single plane around the center of the tube, The holding member that connects both ends of the arc tube has a configuration having a detour portion that detours the tube central portion that is the coldest spot portion.

  With this configuration, the holding member that connects both ends of the arc tube has a detour portion that bypasses the central portion of the tube that is the coldest spot, so the holding member that connects both ends of the arc tube that generates heat No contact with coldest spot. For this reason, since the heat at the end of the arc tube is not transmitted to the coldest point via the holding member, the temperature rise at the coldest point can be suppressed and the luminous efficiency can be improved.

  Moreover, the flat spiral fluorescent lamp of the present invention has a configuration in which the bypass portion is an opening.

  With this configuration, the holding member has an opening as a detour portion, and by positioning the opening at the coldest spot position, the holding member that connects both ends of the arc tube that generates heat does not come into contact with the coldest spot. Can be. As a result, the heat at the end of the arc tube is not transmitted to the coldest spot via the holding member, so that the temperature rise at the coldest spot is suppressed and the luminous efficiency is improved.

  Furthermore, the lighting fixture of this invention has the structure which used the planar spiral fluorescent lamp mentioned above as a light source.

  With this configuration, in the flat spiral fluorescent lamp used for the lighting fixture, the holding member that connects both ends of the arc tube has a detour portion that bypasses the central portion of the tube, which is the coldest point portion, and thus generates heat. The coldest spot does not contact the holding member that connects both ends of the arc tube. For this reason, since the heat at the end of the arc tube is not transmitted to the coldest point via the holding member, the temperature rise at the coldest point is suppressed and the luminous efficiency is improved.

  In the present invention, since the holding member that connects both ends of the arc tube has a detour portion that bypasses the tube central portion that is the coldest spot portion, the holding member that connects both ends of the arc tube that generates heat, No contact with coldest spot. For this reason, since the heat at the end of the arc tube is not transmitted to the coldest point via the holding member, the flat spiral fluorescent lamp having the effect of suppressing the temperature rise at the coldest point and improving the luminous efficiency and A lighting apparatus can be provided.

Hereinafter, embodiments of a flat spiral fluorescent lamp and 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, FIG. 2A is a perspective view of a flat spiral fluorescent lamp according to the embodiment of the present invention as seen from the fixture main body side, and FIG. FIG. 2B is a front view seen from the B direction in FIG.

  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, and covers the lighting device 14 and the panel 13. A mounting plate 15 for mounting is provided. 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 reflector 16 is provided near the center and the other end of the bottom plate 12 to reflect the illumination light of the flat spiral fluorescent lamp 20 as a light source 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 reflector 16. These lamp sockets 17 and 17 are connected to the lighting device 14 by power lines (not shown). When the flat spiral fluorescent lamp 20 is mounted on the lamp socket 17 on the upper surface of the reflecting plate 16, which is the surface facing the flat spiral fluorescent lamp 20 in the instrument body 12, the end of the flat spiral fluorescent lamp 20 is attached. A lamp support spring 18 that holds the portion 22b is provided.

  As shown in FIGS. 2 (A) and 2 (B), a flat spiral fluorescent lamp 20 has an arc tube in which a tubular discharge path is swirled in a double spiral 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. A pair of lamp pins 21 arranged in a direction perpendicular to the plane of the flat spiral fluorescent lamp 20 (vertical direction in FIG. 2B) protrudes along the axial direction of the arc tube 22 on each of the caps 23, 23. Is provided.

  On the side opposite to the coldest spot (22a) of the arc tube 22 (upper side in FIG. 2B), a bridge 24 is provided as a holding member for connecting both ends 22b, 22b of the arc tube 22. At both ends of the bridge 24, ring-shaped holding portions 24a for holding the arc tube 22 are provided. An opening 25 is provided at the center of the bridge 24 as a detour portion that bypasses the central portion (that is, the coldest point) 22a of the arc tube 22 so as not to pass through the vicinity of the central portion 22a of the arc tube 22 that is the coldest point. Is provided. Therefore, the central portion 22a of the arc tube 22 and the bridge 24 are not in contact with each other. The shape of the opening 25 can be a circle or an oval as shown in FIG. 2A, but can also be a rectangle or a shape corresponding to the central portion 22a of the arc tube 22. .

  As described above, according to the luminaire 10 and the flat spiral fluorescent lamp 20 according to the first embodiment of the present invention, the bridge 24 connecting the both end portions 22b and 22b of the arc tube 22 is the coldest spot tube. Since the opening 25 that bypasses the central portion 22a is provided, the bridge 24 that connects both end portions 22b of the arc tube 22 that generates heat does not contact the coldest spot (22a). For this reason, since the heat at the end 22b of the arc tube 22 is not transmitted to the coldest spot (22a) via the bridge 24, the temperature rise at the coldest spot (22a) can be suppressed and the luminous efficiency can be improved. it can.

Next, a flat spiral fluorescent lamp and a lighting fixture according to a second embodiment of the present invention will be described with reference to the drawings.
FIG. 3 is a perspective view showing a flat spiral fluorescent lamp according to a second embodiment of the present invention. In addition, suppose that the same code | symbol is attached | subjected to the site | part common to the lighting fixture concerning 1st Embodiment mentioned above, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 3, in the flat spiral fluorescent lamp 20B used in the lighting apparatus 10B according to the second embodiment of the present invention, the vicinity of the central portion 22a of the arc tube 22 where the central portion of the bridge 24 is the coldest point. A bypass 26 is provided as a bypass for bypassing the central portion 22a of the arc tube 22 in the plane of the bridge 24 so as not to pass through. Although the shape of the detour 26 is not limited, it can be formed in a partial arc shape as shown in FIG. Or it can also provide in rectangular shape (U shape).

  As described above, according to the illuminating device 10B and the flat spiral fluorescent lamp 20B according to the second embodiment of the present invention described above, the same functions and operations as those of the luminaire 10 and the flat spiral fluorescent lamp 20 according to the first embodiment described above. An effect can be acquired and the temperature rise of the coldest spot (22a) can be suppressed, and luminous efficiency can be improved.

  The flat spiral fluorescent lamp of the present invention is not limited to the above-described embodiments, and appropriate modifications and improvements can be made.

The perspective view which shows the lighting fixture concerning 1st Embodiment of this invention. (A) is the perspective view which looked at the flat spiral fluorescent lamp concerning 1st Embodiment of this invention from the instrument main body side, (B) is the front view seen from B direction in (A) The perspective view which looked at the flat spiral fluorescent lamp concerning 2nd Embodiment of this invention from the instrument main body side. Plan view of a conventional flat spiral fluorescent lamp

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Lighting fixture 20 Planar spiral fluorescent lamp 22 Light emission tube 22a Tube center part 22b End part 24 Bridge (holding member)
25 opening (bypass)
26 Detour (detour section)

Claims (3)

A series of bent arc tubes is a flat spiral fluorescent lamp having a double spiral shape swirled in a spiral on a substantially single plane around the center of the tube,
A flat spiral fluorescent lamp characterized in that a holding member that connects both ends of the arc tube has a bypass portion that bypasses the tube central portion, which is the coldest spot portion.   The flat spiral fluorescent lamp according to claim 1, wherein the bypass portion is an opening.   3. A lighting apparatus comprising the flat spiral fluorescent lamp according to claim 1 as a light source.

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