JP2010272428A - Lamp device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lamp device readily attaining thermal connection and fixing between a heat transfer material thermally connected with a discharge light-emitting tube, and a base. <P>SOLUTION: The lamp device 1 includes the discharge light-emitting tube 8 having a capillary part 4 with a coldest spot part 10, an inner case 6 as a discharge light-emitting tube holding means for holding the discharge light-emitting tube 8, and a lighting circuit containing cover 3 supporting the inner case 6 on its one end side, coupled to an E26 base 2 connected with a power source on its other end side, and containing a lighting circuit for lighting the discharge light-emitting tube 8 and further includes a copper fitting 5 as a transfer material for thermally connecting the coldest spot part 10 of the capillary part 4 with the base 2. The copper fitting 5 on the base 2 side is fixed by being nipped between the lighting circuit containing cover 3 and the base 2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a lamp device, and more particularly to a lamp device including a base, a discharge arc tube, and a lighting circuit for lighting the same.

  In recent years, for the purpose of energy saving and the like, a lamp device such as a light bulb type or a compact type fluorescent lamp incorporating an inverter type lighting circuit has come to be frequently used. In general, the radiant heat of the discharge arc tube when this type of bulb-type fluorescent lamp is lit is higher than that of a linear / round fluorescent lamp. Therefore, the current situation is that the supply form of mercury, which is indispensable for the light emission of the fluorescent lamp, is changed between the two lamps. In other words, in the case of linear and round fluorescent lamps with low radiant heat, mercury amalgam having characteristics almost equivalent to pure mercury or sealed mercury is enclosed, so the mercury vapor pressure in the discharge arc tube is optimal at low temperatures. A certain and sufficient light output can be obtained from the start to the stable lighting. In contrast, high-radiant heat bulb-type fluorescent lamps contain mercury amalgam that optimizes the mercury vapor pressure in the discharge arc tube at a temperature higher than that of pure mercury. However, sufficient light output cannot be obtained at low temperatures during start-up.

  In order to obtain a sufficient light output even at the time of start-up in a bulb-type fluorescent lamp with high radiant heat, pure mercury or mercury amalgam having characteristics almost equal to pure mercury is enclosed as in the case of linear and round fluorescent lamps. In addition, it is necessary to release the radiant heat of the discharge arc tube to the outside so that the coldest spot temperature at which mercury in the discharge arc tube collects is close to that of a linear or round fluorescent lamp.

  This type of lamp device is described in Patent Document 1, for example. This technology dissipates heat from the discharge arc tube of the lamp unit to the power base socket through the thermal conductive material and the base by thermally connecting the discharge arc tube and the base of the lamp unit being lit with a heat conductive material. By doing so, the coldest spot temperature of the discharge arc tube is lowered to obtain a sufficient light output at the time of start-up and stable lighting.

JP 2000-11957 A

  The thermal connection and fixing means between the heat conductive material (heat transfer material) thermally connected to the discharge arc tube and the fixing means are complicated by soldering or welding, so the assembly process is complicated. Realization of fixing means is desired.

  Accordingly, an object of the present invention is to provide a lamp device that can easily perform thermal connection and fixing between a heat transfer material thermally connected to a discharge arc tube and a base.

In order to achieve the above object, the present invention provides the following lamp device.
(1) A discharge arc tube having a narrow tube portion having a coldest spot portion, a discharge arc tube holding means for holding the discharge arc tube, and supporting the discharge arc tube holding means on one end side, and on the other end side A lamp device including a lighting circuit storage cover that is connected to a base connected to a power source and stores a lighting circuit for lighting the discharge arc tube, wherein the coldest spot portion of the thin tube portion and the base A lamp device comprising: a heat transfer material that thermally connects the heat transfer material, wherein the heat transfer material on the base side is sandwiched and fixed between the lighting circuit housing cover and the base.
(2) The lamp device according to (1), wherein the heat transfer material is fixed by caulking.
(3) The lamp device according to (1) or (2), wherein the lighting circuit storage cover has an opening through which the heat transfer material passes.

  ADVANTAGE OF THE INVENTION According to this invention, the lamp apparatus which can perform the thermal connection and fixing of the heat-transfer material thermally connected to the discharge arc_tube | light_emitting_tube and a nozzle | cap | die easily can be provided. Thereby, a lamp device having a sufficient light output from the start to the stable lighting can be obtained.

(A) is a perspective view which shows the lamp device which concerns on one Example of this invention, (b) is sectional drawing of the A section when the nozzle | cap | die in (a) is connected with the lighting circuit storage cover.

  Embodiments of a lamp device according to the present invention will be described below with reference to the drawings, taking a fluorescent lamp as an example. FIG. 1A is a perspective view showing a lamp device according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view of a portion A when the base in FIG. 1A is connected to a lighting circuit storage cover. In the figure, reference numeral 1 is a lamp device, 2 is, for example, an E26 base, 3 is a lighting circuit housing cover, 4 is a thin tube portion having the coldest spot of the discharge arc tube, 5 is a copper fitting (heat transfer material), 6 is Inner case (discharge arc tube holding means), 7 is a glove such as a glass globe, 8 is a discharge arc tube with a phosphor coated on the inner surface, 9 is a slit (opening) provided in the lighting circuit storage cover, 10 is This is the coldest spot of the discharge arc tube.

  As shown in FIG. 1A, the lamp device 1 includes a discharge arc tube 8 having a narrow tube portion 4 having a coldest spot portion 10, and an inner case as a discharge arc tube holding means for holding the discharge arc tube 8. 6 and a lighting circuit that supports the inner case 6 on one end side and is connected to the E26 base 2 connected to the power source on the other end side and houses a lighting circuit (not shown) for lighting the discharge arc tube 8 The housing cover 3 is provided, and includes a copper fitting 5 as a heat transfer material for thermally connecting the coldest spot 10 of the thin tube portion 4 and the base 2. In this figure, the base 2 and the lighting circuit storage cover 3 are shown separately for easy understanding. The copper metal fitting 5 on the thin tube portion 4 side is wound around a portion including the coldest spot portion 10 of the thin tube portion 4, thereby improving the thermal connection. Further, the copper metal fitting 5 on the base 2 side is sandwiched and fixed between the lighting circuit storage cover 3 and the base 2. With this pinching and fixing, the thermal connection and fixing between the heat transfer material and the base can be realized with a simple structure without performing soldering or welding. In the present embodiment, the copper metal fitting 5 is used as the heat transfer material, but the present invention is not limited to this, and other metal metal fittings or another heat conducting member may be used.

  As shown in FIG. 1B, the lighting circuit storage cover 3 has a slit 9 as an opening through which the plate-shaped copper metal fitting 5 located on the base side is passed. By providing the slit 9 on the E26 base 2 side of the lighting circuit storage cover 3, the copper metal fitting 5 can be disposed so as not to be substantially exposed outside the lamp device. In addition, since one end of the copper metal fitting 5 is passed through the slit 9 and the metal fitting 5 is sandwiched between the lighting circuit storage cover 3 and the E26 base 2 at the base attachment portion of the lighting circuit storage cover 3, the lighting circuit storage is achieved. Since a part of the cover 3 functions as a heat insulating material, it is possible to reduce the efficiency of transmission of radiant heat to the copper metal fitting 5 due to heat generated by a lighting circuit (not shown). In the present embodiment, the opening portion of the lighting circuit storage cover 3 is a rectangular slit 9, but the shape is not limited to this, and it can be formed in accordance with the cross-sectional shape of the heat transfer material such as the copper fitting 5.

  Further, the copper metal fitting 5 is thermally connected to the E26 base 2, and in this embodiment, the copper metal fitting 5 is sandwiched and fixed between the lighting circuit storage cover 3 and the E26 base 2. In this case, by further caulking the copper metal fitting 5 and the lighting circuit storage cover 3 from the outer surface of the E26 base 2, the thermal connection and fixing of the base 2, the lighting circuit storage cover 3 and the copper metal fitting 5 are further ensured. be able to.

  The present invention relates to a lamp device, and relates to a lamp device that can easily perform thermal connection and fixing between a heat transfer material thermally connected to a discharge arc tube and a base, and is industrially applicable. There is sex.

DESCRIPTION OF SYMBOLS 1 Lamp apparatus 2 E26 base 3 Lighting circuit storage cover 4 Narrow tube part which has the coldest point part 5 Copper metal fitting (heat-transfer material)
6 Inner case (Discharge arc tube holding means)
7 Glass globe 8 Discharge arc tube 9 Slit provided in lighting circuit storage cover 10 Coldest spot of discharge arc tube

Claims (3)

  A discharge arc tube having a thin tube portion having a coldest spot portion, a discharge arc tube holding means for holding the discharge arc tube, and supporting the discharge arc tube holding means on one end side and connecting to a power source on the other end side And a lighting circuit storage cover for storing a lighting circuit for lighting the discharge arc tube, wherein the coldest spot portion of the thin tube portion and the base are thermally connected to each other. A lamp device comprising: a heat transfer material connected to the base, wherein the heat transfer material on the base side is sandwiched and fixed between the lighting circuit housing cover and the base.   The lamp device according to claim 1, wherein the heat transfer material is fixed by caulking.   The lamp device according to claim 1, wherein the lighting circuit storage cover has an opening through which the heat transfer material passes.

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