JP2010244915A - Lamp device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lamp device that is simply structured and capable of bringing its coldest point temperature close to that of a linear round fluorescent lamp. <P>SOLUTION: The lamp device 1 includes: a discharge luminous tube 8 with a small tube portion 4 having a coldest point portion 20; an inner case (discharge luminous tube-holding means) 6 for holding the discharge luminous tube 8; and a lighting circuit housing cover 3 that supports the inner case 6 at one end side, is coupled to a cap 2 that is connected to a power source at the other end side, and houses the lighting circuit (not shown) for lighting the discharge luminous tube 8, wherein the coldest point portion 20 in the small tube 4 is exposed to the outside of the lighting circuit housing cover 3. <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 forcibly discharges hot air radiated from the discharge arc tube of the lamp device being lit to the outside of the lamp device, thereby lowering the coldest point temperature and providing sufficient light output at start-up and stable lighting. I want to get it.

JP 2007-087867 A

  When the heat is forced to be exhausted from the outside in order to bring the coldest spot temperature where mercury in the discharge arc tube collects close to that of a linear or round fluorescent lamp, the structure is complicated, so the coldest spot temperature is simple. It is necessary to lower.

  Accordingly, an object of the present invention is to provide a lamp device that can bring the coldest spot temperature close to a linear / round fluorescent lamp with a simple structure.

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 in the narrow tube portion is the lighting circuit. A lamp device that is exposed outside the storage cover.
(2) The lamp device according to (1), wherein the coldest spot portion in the narrow tube portion is housed in a recess formed outside the lighting circuit housing cover.
(3) The lamp device according to (1) or (2) above, further comprising a heat dissipating member connected to the coldest spot portion in the narrow tube portion.
(4) The lamp device according to any one of (1) to (3), further including a heat transfer material that connects a coldest spot portion in the narrow tube portion to the base.
(5) The lamp device according to (4), wherein the heat transfer material on the base side is sandwiched between the lighting circuit housing cover and the base.
(6) The lamp device according to any one of (1) to (5) above, wherein an inclusion for reducing an influence of radiant heat is provided between the narrow tube portion and the lighting circuit.
(7) The lighting circuit storage cover has an opening for exposing the coldest spot portion of the thin tube portion to the outside, and a foreign matter inside the lighting circuit storage cover around the thin tube portion in the opening portion. The lamp device according to any one of (1) to (6) above, wherein an inclusion for preventing mixing is provided.
(8) The lamp device according to any one of (1) to (7), further including a protective cover that covers the thin tube portion exposed to the outside of the lighting circuit storage cover in a ventilation state.
(9) The lamp device according to (8), wherein the protective cover is a part of an outer surface of the lighting circuit storage cover formed so as to wrap the thin tube portion exposed to the outside.
(10) The lamp device according to (8), wherein the protective cover is a mesh cover that covers the thin tube portion exposed to the outside.

  According to the present invention, the coldest spot temperature can be brought close to a linear / round fluorescent lamp with a simple structure, and a lamp device capable of obtaining sufficient light output from the start to the stable lighting can be obtained. .

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows Example 1 of the lamp device based on this invention, (a) is a perspective view, (b) is AA 'sectional drawing in (a). It is AA 'corresponding sectional drawing of FIG. 1 which shows Example 2 of the lamp device which concerns on this invention. It is AA 'corresponding sectional drawing of FIG. 1 which shows Example 3 of the lamp device which concerns on this invention. It is A-A 'corresponding sectional drawing of FIG. 1 which shows Example 4 of the lamp device which concerns on this invention. It is A-A 'corresponding sectional drawing of FIG. 1 which shows Example 5 of the lamp device which concerns on this invention. It is AA 'corresponding sectional drawing of FIG. 1 which shows Example 6 of the lamp device which concerns on this invention. It is AA 'corresponding sectional drawing of FIG. 1 which shows Example 7 of the lamp device which concerns on this invention. It is a perspective view which shows Example 8 of the lamp device which concerns on this invention. It is a perspective view which shows Example 9 of the lamp device which concerns on this invention.

  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. The reference numerals described in the drawings are all common numerals in each embodiment described below. In each figure, reference numeral 1 is a lamp device, 2 is 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, and 5 is a through hole in the thin tube portion (lighting circuit housing cover). ), 6 is an inner case (discharge arc tube holding means), 7 is a globe, 8 is a discharge arc tube, 9 is a copper fitting (heat radiating material), 10 is a resin heat transfer material, and 11 is a lighting circuit storage cover. Internal ribs, 12 is a silicone material (heat insulating material), 13 is a mesh cover, 20 is the coldest spot of the discharge arc tube, and 21 is a recess formed outside the lighting circuit storage cover.

Example 1
1A and 1B are diagrams showing a first embodiment of a lamp device according to the present invention, in which FIG. 1A is a perspective view and FIG. 1B is a cross-sectional view taken along line AA ′ in FIG. As shown in the figure, the lamp device includes an E26 base 2, a resin lighting circuit housing cover 3, a discharge arc tube 8 formed of, for example, one or a plurality of U-shaped bent bulbs, and a discharge arc tube 8. A thin tube portion 4 having a coldest spot portion, a circuit (not shown) for lighting the discharge arc tube 8, a resin inner case 6 holding the discharge arc tube 8 and the lighting circuit (not shown), a discharge A globe 7 such as a glass globe covering the arc tube 8 is provided. The discharge arc tube 8 has electrodes at both ends, a discharge medium containing mercury and a rare gas is sealed inside, and a phosphor is coated on the inner surface. The discharge arc tube 8 is covered with a globe 7.

  Among these components, the resin-made lighting circuit storage cover 3 penetrates the thin tube portion 4 having the coldest spot of the discharge arc tube 8 from the inside of the lighting circuit storage cover 3 to the outside as shown in FIG. A through hole 5 is formed, and the thin tube portion 4 is exposed to the outside of the lighting circuit storage cover 3.

  That is, in this embodiment, the discharge arc tube 8 having the narrow tube portion 4 having the coldest spot portion 20, the inner case (discharge arc tube holding means) 6 for holding the discharge arc tube 8, and the inner case at one end side. And a lighting circuit storage cover 3 for storing a lighting circuit (not shown) for lighting the discharge arc tube 8, which is connected to the base 2 connected to the power source at the other end. The coldest spot 20 in the portion 4 is exposed to the outside of the lighting circuit storage cover 3. Although the coldest spot part 20 in the thin tube part 4 is accommodated in the recessed part 21 formed in the outer side of the lighting circuit storage cover, for example, it is not limited to this.

  In the present embodiment, the effect obtained by exposing the thin tube portion 4 to the outside of the lighting circuit storage cover 3 is as follows. That is, the narrow tube portion 4 having a glove 7 in which hot air radiated from the discharge arc tube 8 and the lighting circuit (not shown) stays during lighting and the coldest point outside the space surrounded by the lighting circuit storage cover 3. The thin tube portion 4 is not easily affected by hot air, and when the thin tube portion 4 is in contact with the outside air, the temperature of the thin tube portion 4 having the coldest spot portion of the discharge arc tube 8 is lowered. The coldest spot temperature of the discharge arc tube in the conventional lamp device in which the thin tube portion having the coldest spot portion was arranged in the space inside the lighting circuit storage cover 3 was 115 ° C. Since the coldest spot temperature of the discharge arc tube in the present invention is 70 ° C., it is possible to obtain a reduction effect of about 50 ° C. from the coldest spot temperature of the conventional lamp device. It was possible to approach the coldest spot temperature of 40 ° C. As a result, in the present lamp device, the discharge arc tube 8 can be filled with pure mercury or mercury amalgam having characteristics almost equal to pure mercury as in the case of a linear / round fluorescent lamp with low radiant heat. Sufficient light output can be obtained immediately after lighting, including when it is stable and when starting. In this example, mercury amalgam having characteristics almost equal to pure mercury was enclosed.

(Example 2)
FIG. 2 is a cross-sectional view corresponding to AA ′ of FIG. 1 showing Embodiment 2 of the lamp device according to the present invention. As shown in the figure, the present lamp device has a configuration in which a copper fitting (heat dissipating material) 9 is connected to the coldest spot portion 20 in the thin tube portion 4 in addition to the configuration of the first embodiment. That is, a present Example is provided with the thermal radiation material connected with the coldest spot part in a thin tube part.

  In this embodiment, the thin tube portion 4 is exposed to the outside of the lighting circuit housing cover 3, and the effect obtained by connecting the copper fitting (heat dissipating material) 9 to the coldest spot portion 20 in the thin tube portion 4 is as follows. That is, the narrow tube portion 4 having the coldest point portion outside the space surrounded by the globe 7 and the lighting circuit storage cover 3 where hot air radiated from the discharge arc tube 8 and the lighting circuit (not shown) stays during lighting is retained. By disposing, the thin tube portion 4 is not easily affected by hot air, and further, the copper tube 9 is connected to the thin tube portion 4 as a heat dissipating material to dissipate heat to the outside air. Since the temperature of the portion 4 is lowered, it is possible to enclose pure mercury or mercury amalgam having characteristics substantially equal to pure mercury, and a sufficient light output can be obtained immediately after lighting, including when lighting is stable and when starting.

  The heat dissipating material is not limited to the copper metal fitting 9 and may be a metal material other than copper, such as aluminum having excellent heat dissipating property, a silicone material, or a resin.

Example 3
FIG. 3 is a cross-sectional view corresponding to AA ′ of FIG. 1 showing Embodiment 3 of the lamp device according to the present invention. As shown in the figure, in the lamp device, in addition to the configuration of the first embodiment, one end of the resin heat transfer material 10 is connected to the coldest spot portion in the thin tube portion 4 and the other end is connected to the E26 base 2. It is a configuration. Here, the base-side heat transfer material 10 is sandwiched between the lighting circuit storage cover 3 and the base 2.

  In this embodiment, the thin tube portion 4 is exposed to the outside of the lighting circuit storage cover 3, one end of the thin tube portion 4 resin heat transfer material 10 is directly connected, and the other end is directly connected to the E26 base 2. It is as follows. That is, the narrow tube portion 4 having the coldest point portion outside the space surrounded by the globe 7 and the lighting circuit storage cover 3 where hot air radiated from the discharge arc tube 8 and the lighting circuit (not shown) stays during lighting is retained. By arranging, the thin tube portion 4 is not easily affected by hot air, and is further connected to the thin tube portion 4 as a resin heat transfer material 10 to dissipate heat to the power base socket via the E26 base 2 and to dissipate heat to the outside air. As a result, the temperature of the thin tube portion 4 having the coldest spot portion of the discharge arc tube 8 is lowered, so that pure mercury or mercury amalgam having characteristics almost equal to pure mercury can be enclosed, and when lighting is stable and starting A sufficient light output can be obtained immediately after lighting including the time.

  The resin heat transfer material 10 is sandwiched between the lighting circuit housing cover 3 and the E26 base 2 so that the resin heat transfer material 10 and the E26 base 2 are thermally connected and can be easily fixed.

  The heat transfer material is not limited to resin, and for example, a metal material excellent in heat dissipation or a silicone material may be used. However, when the heat transfer material is conductive, it is preferable to prevent electric shock by electrical connection with the base, and indirectly through an insulating material between the base and the conductive heat transfer material. It is necessary to thermally connect them or to cover the outer surface of the conductive heat transfer material with an insulator. Further, the base is not limited to E26, and for example, an E17 base may be used.

Example 4
FIG. 4 is a cross-sectional view corresponding to AA ′ of FIG. 1 showing Embodiment 4 of the lamp device according to the present invention. As shown in the figure, this lamp device reduces the radiant heat of the discharge arc tube 8 and the lighting circuit (not shown) around the narrow tube portion 4 inside the lighting circuit housing cover 3 in addition to the configuration of the first embodiment. It is the structure provided with the rib 11 as an inclusion. That is, in this embodiment, a rib is provided as an inclusion for reducing the influence of radiant heat between the narrow tube portion and the lighting circuit.

  In this embodiment, the effect obtained by exposing the thin tube portion 4 to the outside of the lighting circuit housing cover 3 and providing ribs around the thin tube portion 4 is as follows. That is, a lighting circuit (not shown) and a thin tube portion are provided in a space surrounded by the globe 7 and the lighting circuit storage cover 3 where hot air radiated from the discharge arc tube 8 and the lighting circuit (not shown) stays during lighting. 4 is provided with a rib 11 so that the thin tube portion 4 does not directly receive the radiant heat of the lighting circuit (not shown) and becomes a coldest tube outside the space surrounded by the globe 7 and the lighting circuit storage cover 3. By disposing the portion 4, the thin tube portion 4 is hardly affected by hot air, and further, when the thin tube portion 4 touches the outside air, the temperature of the thin tube portion 4 having the coldest spot portion of the discharge arc tube 8 is lowered. Therefore, pure mercury or mercury amalgam having characteristics almost equal to pure mercury can be enclosed, and a sufficient light output can be obtained immediately after lighting including stable lighting and starting.

(Examples 5-7)
5 is a cross-sectional view corresponding to AA ′ of FIG. 1 showing Embodiment 5 of the lamp device according to the present invention, and FIG. 6 is AA ′ of FIG. 1 showing Embodiment 6 of the lamp device according to the present invention. FIG. 7 is a cross-sectional view corresponding to AA ′ of FIG. 1, showing a seventh embodiment of the lamp device according to the present invention. As shown in the figure, the present lamp device reduces the radiant heat of the discharge arc tube 8 and the lighting circuit (not shown) around the narrow tube portion 4 in addition to the configuration of the first embodiment, and enters the inside of the lighting circuit housing cover 3. This is a configuration in which the silicone material 12 is filled as an inclusion for preventing foreign matter contamination and reducing external pressure damage to the thin tube portion 4. That is, the lighting circuit storage cover has an opening (a through hole in the thin tube) for exposing the coldest spot in the thin tube to the outside. In this embodiment, the opening (the through hole 5) has an opening. For example, inclusions for preventing foreign matter from entering the lighting circuit storage cover are provided around the thin tube portion. This inclusion may be configured to have a function of reducing radiant heat and / or a function of reducing external pressure damage to the thin tube portion, or both.

  In this embodiment, the thin tube portion 4 is exposed to the outside of the lighting circuit storage cover 2 and the effect obtained by filling the thin tube portion 4 with the silicone material 12 is as follows. That is, the narrow tube portion 4 having the coldest point is disposed outside the space surrounded by the globe 7 and the lighting circuit storage cover 3 where hot air radiated from the discharge arc tube 8 and the lighting circuit (not shown) stays during lighting. In addition, the silicone material filled in the peripheral portion of the thin tube portion 4 blocks the space surrounded by the globe 7 and the lighting circuit storage cover 3 and the outside, so that the thin tube portion 4 is hardly affected by hot air, Since the temperature of the narrow tube portion 4 having the coldest spot portion of the discharge arc tube 8 is decreased, pure mercury or mercury amalgam having characteristics almost equal to pure mercury can be enclosed, and lighting including stable lighting and starting Immediately after that, a sufficient light output can be obtained.

  Further, since the thin tube portion 4 is exposed to the outside from the inside of the lighting circuit storage cover 3 through the through hole 5, a gap is generated between the through hole 5 and the thin tube 4. However, this gap allows foreign matters such as dust, dirt, moisture, and insects to enter the lamp device from the outside to the inside, which may cause a failure or malfunction of the lamp device. By filling the silicone material 12 so as to fill the gap, it is possible to prevent foreign matter from entering the lamp device.

  Furthermore, since the thin tube portion 4 is made of a glass material, the thin tube portion 4 is easily damaged by external pressure or vibration applied to the thin tube portion 4. By filling the silicone material 12 between the thin tube portion 4 and the lighting circuit storage cover 3, a buffering effect can be obtained, and damage to the thin tube portion 4 due to external pressure or vibration can be reduced.

  The silicone material 12 may be filled so as to wrap and cover the entire thin tube portion 4 (FIG. 5), or may be filled into a part of the thin tube portion 4 (FIG. 6). Further, the filling portion of the thin tube portion 4 with the silicone material 12 may be outside (FIGS. 5 and 6) or inside (FIG. 7) of the lighting circuit housing cover 3.

  The inclusion is not limited to the silicone material, and may be a heat insulating material such as glass wool or cement, for example.

(Example 8)
FIG. 8 is a perspective view showing an eighth embodiment of the lamp device according to the present invention. As shown in the figure, in addition to the configuration of the first embodiment, the present lamp device exposes the thin tube portion 4 having the coldest spot portion of the discharge arc tube 8 to the outside in order to reduce external pressure damage of the thin tube portion 4. A part of the outer surface of the lighting circuit storage cover 3 is configured to cover the thin tube portion 4. That is, in this embodiment, the protective cover that covers the thin tube portion exposed to the outside of the lighting circuit storage cover in a vented state is configured by a part 14 of the outer surface of the lighting circuit storage cover formed so as to wrap the thin tube portion. However, the present invention is not limited to this. For example, a mesh cover other than the lighting circuit storage cover can be used as described later.

  In this embodiment, the thin tube portion 4 is exposed to the outside of the lighting circuit storage cover 3, and the effect of covering a part of the outer surface of the lighting circuit storage cover 3 so as to wrap the thin tube portion 4 is as follows. That is, since the thin tube portion 4 is made of a glass material, the thin tube portion 4 is easily damaged by receiving external pressure. For this reason, when the lamp device is attached to or detached from the base power supply socket, there is a risk that the thin tube portion 4 may be damaged by finger pressure due to the finger touching the thin tube portion 4. In addition, damage due to contact with an object other than a finger is also conceivable.

  In order to reduce such damage to the thin tube portion 4, a portion of the outer surface of the lighting circuit storage cover 3 that exposes the thin tube 4 to the outside has a cold tube portion 4 having the coldest spot portion of the discharge arc tube 8. The finger cannot touch the thin tube portion 4 directly. Further, the frequency with which an object other than the finger also contacts the thin tube portion 4 is reduced.

  However, since the thin tube portion 4 having the coldest point portion needs to be lowered in temperature by touching the outside air, it is a lighting circuit storage cover 3 configuration in which the temperature lowering effect by the convection of the outside air to the thin tube portion 4 is maintained. .

Example 9
FIG. 9 is a perspective view showing Embodiment 9 of the lamp device according to the present invention. As shown in the figure, the present lamp device has a configuration in which, in addition to the configuration of the first embodiment, the lighting circuit storage cover 3 is provided with a mesh cover 13 as a protective cover in order to reduce external pressure damage of the narrow tube portion 4.

  In this embodiment, the thin tube portion 4 is exposed to the outside of the lighting circuit storage cover 3, and the effect obtained by providing the lighting circuit storage cover 3 with the mesh cover 13 is as follows. That is, since the thin tube portion 4 is made of a glass material, the thin tube portion 4 is easily damaged by receiving external pressure. For this reason, when the lamp device is attached or detached from the base power socket, there is a risk that the finger will touch the lamp thin tube portion 4 and the thin tube portion 4 may be damaged by finger pressure. In addition, damage due to contact with an object other than a finger is also conceivable.

  In order to reduce such damage to the thin tube portion 4, the lighting circuit storage cover 3 that exposes the thin tube 4 to the outside is provided with a mesh cover 13, and the thin tube portion 4 having the coldest spot portion of the discharge arc tube 8 is provided. By adopting a configuration in which the mesh cover 13 covers the finger, the finger cannot directly touch the thin tube portion 4. Further, the frequency with which an object other than the finger also contacts the thin tube portion 4 is reduced.

  However, since it is necessary to reduce the temperature of the narrow tube portion 4 having the coldest point by touching the outside air, the configuration of the lighting circuit storage cover 3 has an effect of lowering the temperature by convection of the outside air to the narrow tube portion 4.

  The discharge arc tube 8 of the lamp device of the present invention is not limited to a U-shaped bent bulb, and may be, for example, a spiral shape.

  The lamp device of the present invention is not limited to the one provided with the globe 7, and may be a globeless type, for example.

  The present invention relates to a lamp device, and relates to a lamp device that can obtain a sufficient light output immediately after lighting, including when lighting is stable and when starting, and has industrial applicability.

DESCRIPTION OF SYMBOLS 1 Lamp apparatus 2 E26 base 3 Lighting circuit storage cover 4 Thin tube used as the coldest point 5 Through-hole 6 of thin tube used as the coldest point Inner case (discharge arc tube holding means)
7 Globe 8 Discharge arc tube 9 Copper fitting (heat transfer material)
10 Resin Heat Transfer Material 11 Rib 12 in Lighting Circuit Storage Cover Silicone Material 13 Mesh Cover

Claims (10)

  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 housing cover that houses a lighting circuit for lighting the discharge arc tube, wherein the coldest spot in the narrow tube portion is the coldest spot portion of the lighting circuit housing cover. A lamp device characterized by being exposed to the outside.   The lamp device according to claim 1, wherein the coldest spot portion in the narrow tube portion is housed in a recess formed outside the lighting circuit housing cover.   The lamp device according to claim 1, further comprising a heat dissipating member connected to a coldest spot portion in the narrow tube portion.   The lamp device according to any one of claims 1 to 3, further comprising a heat transfer material for connecting a coldest spot portion in the narrow tube portion to the base.   The lamp device according to claim 4, wherein the base-side heat transfer material is sandwiched between the lighting circuit housing cover and the base.   The lamp device according to claim 1, further comprising an inclusion for reducing an influence of radiant heat between the thin tube portion and the lighting circuit.   The lighting circuit storage cover has an opening for exposing the coldest spot in the thin tube portion to the outside, and prevents foreign matter from entering the lighting circuit storage cover around the thin tube portion in the opening. The lamp device according to any one of claims 1 to 6, further comprising an inclusion for the purpose.   The lamp device according to claim 1, further comprising a protective cover that covers the thin tube portion exposed to the outside of the lighting circuit storage cover in a ventilation state.   9. The lamp device according to claim 8, wherein the protective cover is a part of an outer surface of the lighting circuit storage cover formed so as to wrap the thin tube portion exposed to the outside.   The lamp device according to claim 8, wherein the protective cover is a mesh cover that covers the narrow tube portion exposed to the outside.

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