JP6304946B2 - LIGHTING LAMP, LIGHTING DEVICE, AND LIGHTING LAMP MANUFACTURING METHOD - Google Patents

Description

  The present invention relates to an illumination lamp including an electrolytic capacitor, an illumination device including the illumination lamp, and a method for manufacturing the illumination lamp.

  The bulb-type illumination lamp is provided with a lighting circuit unit that drives a light source, and this lighting circuit unit includes a circuit board and a plurality of circuit components mounted on the circuit board. Since these circuit components generate heat during operation, it is necessary to dissipate this heat and cool it. Further, it is necessary to insulate the lighting circuit unit from the casing or the like in order to prevent the lighting circuit unit from coming into contact with the casing or the like installed therein to cause a short circuit.

  Moreover, the lighting circuit unit of the bulb-type illumination lamp may be provided with an electrolytic capacitor. In this electrolytic capacitor, the internal pressure may increase due to heat generation due to current, mist due to evaporation of the electrolyte, and / or gas generation due to electrolysis of the electrolyte. For this reason, in order to suppress this, the electrolytic capacitor is provided with a pressure valve (also referred to as a safety valve or an explosion-proof valve).

  The following techniques are disclosed as techniques for cooling and insulating the lighting circuit unit while ensuring a space necessary for the pressure valve to operate normally.

  Patent Document 1 discloses a light bulb-type fluorescent lamp in which an electronic component having a high heat generation temperature is covered with a heat conductive material (filling member) among a plurality of electronic components provided in a lighting circuit for lighting a fluorescent lamp. Has been. The thermally conductive material is filled inside the lamp cover body so as to come into contact with the inner surface of the lamp cover body and the circuit board surface closer to the base than the circuit board. In this conventional technique, an electronic component having a high heat generation temperature is covered with a heat conductive material, so that heat generated from the electronic component is radiated to the outside. Patent Document 1 also discloses a bulb-type fluorescent lamp that covers an electrolytic capacitor with a heat conductive material (silicone resin) while avoiding a pressure valve.

  Further, in Patent Document 2, in one side of a substrate on which a plurality of circuit components are mounted, one surface on which a circuit component that generates more heat than the other surface is mounted. On the side, a lighting device filled with a heat conductive resin is disclosed.

Japanese Patent No. 4421177 (Claim 1, FIG. 1, FIG. 5) Japanese Patent No. 4914511 (Claim 1, FIGS. 2 to 4)

  However, since the light bulb-type fluorescent lamp disclosed in Patent Document 1 dissipates heat generated from the electrolytic capacitor only with a heat conductive material, the heat dissipation amount is insufficient. In addition, the lighting device disclosed in Patent Document 2 also has low heat dissipation because heat generated from circuit components is radiated to the outside using only the heat conductive resin. In addition, this patent document 2 does not disclose an electrolytic capacitor and does not disclose a pressure valve. As described above, Patent Document 2 does not consider the means for performing the normal operation of the pressure valve.

  The present invention has been made against the background of the above problems. An illumination lamp, an illumination device, and an illumination lamp capable of cooling an electrolytic capacitor while securing a space necessary for the operation of the pressure valve of the electrolytic capacitor are provided. A manufacturing method is provided.

An illumination lamp according to the present invention includes a light source, a circuit board connected to the light source on one side, and an electrolytic capacitor that is mounted along the circuit board outside the circuit board surface and includes a pressure valve. A circuit unit, a cylindrical casing having a base portion disposed inside the lighting circuit unit and disposed on the other side of the circuit board, and at least a part of the lighting circuit unit so that the pressure valve is exposed. A filling member that is filled inside and radiates heat generated from the lighting circuit unit to the housing; and a heat conduction member that is connected to the electrolytic capacitor and the housing and radiates heat generated from the electrolytic capacitor to the housing. , have a, electrolytic capacitor is positioned between the light source and the circuit board.

  According to the present invention, since the filling member is filled in the housing so as not to cover the pressure valve, and the electrolytic capacitor and the housing are connected by the heat conducting member, the operation of the pressure valve is hindered. Without this, the electrolytic capacitor can be cooled.

1 is a sectional view showing an illumination lamp 1 according to Embodiment 1. FIG. 4 is a flowchart showing a manufacturing process of the illumination lamp 1 according to the first embodiment. 5 is a cross-sectional view showing a manufacturing process of illumination lamp 1 according to Embodiment 1. FIG. 3 is a cross-sectional view showing a heat transfer path of the illumination lamp 1 according to Embodiment 1. FIG. 1 is a schematic diagram showing a lighting device 2 according to Embodiment 1. FIG. 6 is a cross-sectional view showing an illumination lamp 1 according to a modification of the first embodiment. FIG.

  Hereinafter, embodiments of an illumination lamp and an illumination device according to the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below. Moreover, in the following drawings including FIG. 1, the relationship of the size of each component may be different from the actual one.

Embodiment 1 FIG.
1A and 1B are cross-sectional views showing an illumination lamp 1 according to Embodiment 1. FIG. Among these, Fig.1 (a) is an axial sectional view of the illumination lamp 1, and FIG.1 (b) is AA sectional drawing of Fig.1 (a). The illumination lamp 1 will be described with reference to FIGS. 1 (a) and 1 (b). As shown in FIG. 1A, the illumination lamp 1 includes a light source 3, a globe 4, a housing 5, a base portion 6, a lighting circuit unit 11, a filling member 7, and a heat conducting member 8. I have.

(Light source 3)
Among these, the light source 3 uses, for example, a light emitting diode (hereinafter, LED 3a) as light emitting means, and the light source 3 includes the LED 3a and an LED substrate 3b on which the LED 3a is placed. The light source 3 also includes a wiring member (not shown) such as a wire harness or a connector that is electrically connected to the lighting circuit unit 11 and transmits driving power from the lighting circuit unit 11 to the light source 3. In addition, the light source 3 includes an attachment member (not shown) such as a screw for attaching the LED 3 a to the housing 5, and electronic components that are appropriately required according to the design specifications of the illumination lamp 1. In the present embodiment, the LED 3a is used as the light emitting means of the light source 3. However, for example, a laser diode, an organic EL, or a fluorescent lamp may be used as the light emitting means of the light source 3.

(Glove 4)
The globe 4 has a dome shape and covers a light emitting side portion of the light source 3. The globe 4 is made of a material such as glass or resin, has translucency, and transmits light emitted from the LED 3a. When the globe 4 is a resin, polycarbonate or acrylic is selected as a resin material according to product specifications.

  The globe 4 may be configured to exert an action such as diffusion, condensing or reflection on the light emitted from the LED 3a. These functions such as diffusion, condensing, and reflection are performed directly on the base material by treating the base material of the globe 4, such as glass or resin, with a diffusion layer or a diffusion surface, a lens, a reflection layer, or a reflection surface. It may be obtained by applying. Moreover, functions such as diffusion, light collection, and reflection may be obtained by providing a member different from the base material on the surface of the base material of the globe 4 and combining them.

(Case 5)
Next, the housing 5 will be described. The housing 5 has a cylindrical shape, and includes a metal housing portion 5 a, a resin housing portion 5 b, and a base portion 6. Among these, the metal housing | casing part 5a comprises the outline of the illumination lamp 1, and the LED board 3b is mounted in the end surface of this metal housing | casing part 5a. Moreover, the resin housing | casing part 5b is provided in the inside of the metal housing | casing part 5a, for example, is shape | molded using raw materials, such as a plastics. And as for this resin housing | casing part 5b, the lighting circuit unit 11 is installed in the inside of the resin housing | casing part 5b by inserting the lighting circuit unit 11 from opening of an edge part. Further, the end of the resin casing 5b opposite to the light source 3 is opposite to the end of the metal casing 5a opposite to the light source 3 (the direction of the arrow Z1). Protruding. In addition, the cylindrical inner peripheral surface of the metal housing portion 5a and the cylindrical outer peripheral surface of the resin housing portion 5b may be in contact with each other.

  Next, the base part 6 will be described. The base portion 6 has a cylindrical shape, and its side surface has a wave shape. And the one end part of this nozzle | cap | die part 6 is fitted by the edge part on the opposite side to the light source 3 in the resin housing | casing part 5b. As described above, the end of the resin casing 5b opposite to the light source 3 is in the direction opposite to the light source 3 from the end of the metal casing 5a opposite to the light source 3 ( It protrudes in the direction of arrow Z1), and this protruding portion is fitted with one end of the cap portion 6. That is, the metal housing part 5a and the base part 6 are electrically insulated by the resin housing part 5b.

  In addition, a through hole 6 a for passing a wiring member (not shown) is provided at the other end of the base part 6. And the center electrode 6b which seals the front-end | tip of the through-hole 6a is provided in the front-end | tip of this through-hole 6a, and the center electrode 6b and the lighting circuit are provided by the wiring member passed through the through-hole 6a. The unit 11 is electrically connected. The center electrode 6b is provided by joining the wiring member and the other end of the base 6 with solder or the like. The base 6 is attached to a lighting fixture (socket) (not shown), thereby serving as an input terminal for inputting commercial power to the lighting lamp 1 via the lighting fixture.

(Lighting circuit unit 11)
Next, the lighting circuit unit 11 will be described. The lighting circuit unit 11 includes a circuit board 12, an electrolytic capacitor 13 provided at one end of the circuit board 12, and a plurality of circuit components other than the electrolytic capacitor 13. Among these, the circuit board 12 is mounted with an AC-DC converter circuit that converts AC power, which is commercial power, into DC power for driving the LED 3a. In addition, the lighting circuit unit 11 is electrically connected to the base 6 and a wiring member (not shown) such as a wire harness or a connector for transmitting commercial power from the base 6 to the lighting circuit unit 11. It also has. The lighting circuit unit 11 converts the commercial power input from the base unit 6 into driving power (DC power) for driving the light source 3, and supplies the driving power to the light source 3. In order to stably drive the LED 3a, a load fluctuation detection function, a control function for controlling the drive current output from the AC-DC converter circuit according to the load fluctuation, and a commercial power supply path A filter function or the like that removes or reduces outflowing noise may be mounted on the lighting circuit unit 11. In addition, when using a laser diode, organic EL, a fluorescent lamp, etc. as a light emission means of the light source 3, the light emission means is lighted using the lighting circuit suitable for each.

  The lighting circuit unit 11 is inserted from the opening at the end of the resin casing 5b, and is thereby installed inside the resin casing 5b. Note that a holding structure (not shown) for holding the circuit board 12 in the lighting circuit unit 11 may be formed in the resin casing 5b. In this case, except for the circuit board 12 held by the holding structure, a certain amount of gap is formed between the inner wall of the resin casing 5 b and the plurality of circuit components in the lighting circuit unit 11. As described above, the lighting circuit unit 11 is installed inside the resin casing 5b while providing a gap between the circuit component and the resin casing 5b, whereby mechanical stress is applied to the resin casing 5b. Even if it is applied, this mechanical stress is difficult to be transmitted from the resin casing 5b to the circuit components.

(Electrolytic capacitor 13)
Next, the electrolytic capacitor 13 will be described. The electrolytic capacitor 13 has a function of smoothing input commercial power and a function of reducing the pulsating flow of driving power supplied to the light source 3 in order to drive the LED 3a which is a light emitting means of the light source 3. Yes. Stable light emission can be obtained by supplying the DC power stabilized by the electrolytic capacitor 13 to the light source 3. Further, the capacitance value or voltage specification of the electrolytic capacitor 13 is determined according to the design specification of the illumination lamp 1, and the outer dimension of the electrolytic capacitor 13 depends on the capacitance value or voltage specification and the like. .

  The electrolytic capacitor 13 is provided at one end of the circuit board 12 via a terminal, and the longitudinal direction of the electrolytic capacitor 13 (arrow Z direction) and the longitudinal direction of the circuit board 12 (arrow Z direction) are It is mounted on the circuit board 12 so as to be parallel. The electrolytic capacitor 13 is installed not on the base 6 side but on the light source 3 side inside the resin casing 5b. As a result, the dimensional constraints associated with the miniaturization of the illumination lamp 1 can be accommodated, and the electrolytic capacitor 13 can be separated from the light source 3 as the main heat generation source and the lighting circuit unit 11 other than the electrolytic capacitor 13 to perform electrolysis. The operational reliability of the capacitor 13 can be improved.

  Thus, when the electrolytic capacitor 13 is disposed on the light source 3 side, the circuit components other than the electrolytic capacitor 13 are disposed on the base portion 6 side with respect to the electrolytic capacitor 13. The circuit components except the electrolytic capacitor 13 generate less heat during operation than the electrolytic capacitor 13. For this reason, by arranging such a circuit component with a large calorific value on the base part 6 side, the heat transfer efficiency of the heat transmitted through the base part 6 is improved, and this heat is reduced by electrolysis. It is possible to prevent the capacitor 13 from reaching.

  And since the electrolytic capacitor 13 is an electronic component with comparatively low heat resistance, it is preferable to keep the operating environment temperature as low as possible. Thus, the operating life of the electrolytic capacitor 13 can be extended by keeping the operating environment temperature of the electrolytic capacitor 13 low. As a result, the operating life of the lighting circuit unit 11 and the illumination lamp 1 can be extended. When the light emitting means of the light source 3 is other than the LED 3a, the electrolytic capacitor 13 can have a different function. The electrolytic capacitor 13 may be fixed to the circuit board 12 using an adhesive member or the like.

  In addition, the electrolytic capacitor 13 is provided with a pressure valve 13a, and the pressure valve 13a causes abnormal operation due to aging of the electrolytic capacitor 13 or abnormal operation due to use in an unexpected environment. In addition, the rise in internal pressure is suppressed to ensure safety. The pressure valve 13a is also referred to as a safety valve or an explosion-proof valve.

(Filling member 7)
Next, the filling member 7 will be described. The filling member 7 is made of, for example, a resin having thermal conductivity, and is filled in the resin casing 5b so as to cover a portion of the lighting circuit unit 11 excluding the electrolytic capacitor 13. Thereby, the lighting circuit unit 11 is fixed inside the resin casing 5b and electrically insulated from the resin casing 5b. And the heat which generate | occur | produces from the lighting circuit unit 11 by this filling member 7 is thermally radiated by the resin housing | casing part 5b.

(Heat conduction member 8)
Next, the heat conductive member 8 will be described. The heat conducting member 8 is made of, for example, resin or metal, and as shown in FIG. 1B, the heat conducting member 8 is interposed between the electrolytic capacitor 13 and the resin casing 5b. Thereby, these electrolytic capacitor 13 and the resin housing | casing part 5b are connected. The heat generated from the electrolytic capacitor 13 is radiated to the resin casing 5b by the heat conducting member 8.

  The heat conducting member 8 is provided in a portion where the gap between the electrolytic capacitor 13 and the resin casing 5b is the narrowest. The heat conducting member 8 is provided as far as possible from the heat transfer path of heat generated from the light source 3 and the heat transfer path of heat generated from the lighting circuit unit 11. Thereby, cooling of the electrolytic capacitor 13 by the heat conducting member 8 is promoted. Further, the heat conducting member 8 may be a material having flexibility (elasticity), thereby absorbing mechanical stress including thermal deformation.

(Heat generation area)
Next, a heat generation area in the illumination lamp 1 according to the first embodiment will be described. The illumination lamp 1 includes a first heat generation area 41 and a second heat generation area 42 which are two main heat generation areas (main heat generation areas), and the first heat generation area 41 and the second heat generation area 42. And a third heat generation region 43 which is a sub heat generation region with a small heat generation amount.

(First heating region 41)
Among these, the 1st heat_generation | fever area | region 41 is an area | region containing the light source 3 provided with LED3a which is a light emission means, and LED board 3b in which this LED3a was mounted. The conversion efficiency at which the input power to the LED 3a is converted into light is about 27% to 38%, and most of the input power is converted into thermal energy and released outside the LED 3a.

(Second heat generation region 42)
Next, the second heat generating area 42 will be described. The second heat generating area 42 is an area of the lighting circuit unit 11 excluding the electrolytic capacitor 13. As described above, the lighting circuit unit 11 has an AC-DC converter circuit that converts AC power, which is commercial power, into DC power for driving the LED 3a. This AC-DC converter circuit is composed of electronic components such as switching elements such as FETs, inductors and transformers (none of which are shown), and these electronic components generate heat as the lighting circuit unit 11 operates. To do. The conversion efficiency by which commercial power is converted into drive power for driving the LED 3a by this AC-DC converter circuit is about 85% to 90%, and the remaining 10% to 15% is converted into heat energy. , Discharged outside the electronic component. In this way, the lighting circuit unit 11 excluding the electrolytic capacitor 13 is the second largest heat source after the light source 3.

(Third heat generation region 43)
Next, the third heat generating region 43 will be described. The third heat generating region 43 is a region including the electrolytic capacitor 13 between the first heat generating region 41 and the second heat generating region 42. As described above, the electrolytic capacitor 13 generates heat when the input commercial power is smoothed or when the pulsating flow of the driving power supplied to the light source 3 for driving the LED 3a is reduced. However, the amount of heat energy (self-heating amount) generated from the electrolytic capacitor 13 is smaller than the amount of heat energy generated from the lighting circuit unit 11 other than the light source 3 and the electrolytic capacitor 13. Since the electrolytic capacitor 13 is not covered with the heat conductive filling member 7, the air around the electrolytic capacitor 13 particularly reduces the influence of thermal energy generated from the light source 3 (thermal insulation effect).

  It should be noted that a resin material (not shown) may be interposed between the first heat generation area 41 and the third heat generation area 43 to further reduce the influence of the heat energy generated from the light source 3. In this case, the resin material has an amount of heat generated from the first heat generation area 41 and the second heat generation area 42 or a heat transfer path generated from the first heat generation area 41 and the second heat generation area 42. In consideration, the resin casing 5b may be integrally formed, or the resin casing 5b may be integrated with the resin casing 5b.

(Production method)
Next, a method for manufacturing the illumination lamp 1 according to the first embodiment will be described. FIG. 2 is a flowchart showing the manufacturing process of the illumination lamp 1 according to the first embodiment, and FIGS. 3A, 3B, and 3C are cross-sectional views showing the manufacturing process of the illumination lamp 1 according to the first embodiment. FIG. 3A is a sectional view showing the illumination lamp 1 after completion of step S2 in FIG. 2, and FIG. 3B is a sectional view showing the illumination lamp 1 after completion of step S3 in FIG. FIG. 3C is a cross-sectional view showing the illumination lamp 1 after completion of step S4 in FIG.

  First, the electrolytic capacitor 13 including the pressure valve 13a and electronic components other than the electrolytic capacitor 13 are mounted on the circuit board 12 to form the lighting circuit unit 11 (step S1). Next, as shown in FIG. 3A, the lighting circuit unit 11 is installed inside the resin casing 5b (step S2).

  And as shown in FIG.3 (b), the inside of the resin housing | casing part 5b is filled so that the lighting circuit units 11 other than the electrolytic capacitor 13 may be covered (step S3). At this time, the filling member 7 is filled to a position slightly closer to the base part 6 (in the direction of the arrow Z1) than the position B horizontal to the end face of the electrolytic capacitor 13 on the base part 6 side. Before the filling member 7 is filled, the base part 6 is connected to the resin casing part 5b, and the through hole 6a of the base part 6 is closed with solder or the like to form the center electrode 6b. Leakage of the member 7 can be suppressed.

  Thereafter, as shown in FIG. 3 (c), the electrolytic capacitor 13 and the resin casing 5b are connected by interposing the heat conducting member 8 between the electrolytic capacitor 13 and the resin casing 5b. (Step S4). The heat conducting member 8 is provided while ensuring a certain gap between the heat conducting member 8 and the filling member 7. For example, the heat conducting member 8 is provided at a position that is separated from the end face of the electrolytic capacitor 13 on the side of the base part 6 by a distance D from the position B parallel to the base part 6 (arrow Z2 direction). And the metal housing | casing part 5a, the light source 3, the globe 4, etc. are attached, and the illumination lamp 1 is assembled (step S5).

(Function)
Next, the operation of the illumination lamp 1 according to the first embodiment will be described. FIG. 4 is a cross-sectional view showing a heat transfer path of the illumination lamp 1 according to the first embodiment. As described above, the illumination lamp 1 is formed with the first heat generation area 41, the second heat generation area 42, and the third heat generation area 43. As shown in FIG. 4, the heat transfer path of the illumination lamp 1 is from the first heat transfer path 51 and the second heat generation area 42 which are paths through which heat generated from the first heat generation area 41 is transmitted. There are a second heat transfer path 52 which is a path through which the generated heat is transferred, and a third heat transfer path 53 which is a path through which heat generated from the third heat generating region 43 is transferred.

(First heat transfer path 51)
First, the first heat transfer path 51 will be described. The thermal energy released from the LED 3a included in the first heat generating area 41 is transmitted to the metal casing 5a on which the LED substrate 3b is placed, and this metal casing 5a is passed through the main heat transfer path (first Is transmitted to the outside of the illumination lamp 1 as a heat transfer path 51).

(Second heat transfer path 52)
Next, the second heat transfer path 52 will be described. Since the lighting circuit unit 11 included in the second heat generation region 42 is covered with the heat conductive filling member 7, the heat energy generated from the second heat generation region 42 is supplied to the filling member 7, the resin casing portion. 5b and the base 6 are sequentially transmitted, and the filling member 7, the resin casing 5b and the base 6 are transmitted to the outside of the illumination lamp 1 as a main heat transfer path (second heat transfer path 52). Is done.

(Third heat transfer path 53)
Next, the third heat transfer path 53 will be described. Since the electrolytic capacitor 13 included in the third heat generating region 43 is connected to the resin casing 5b by the heat conducting member 8, the heat energy generated from the electrolytic capacitor 13 is the heat conducting member 8, the resin casing. The heat conducting member 8, the resin casing 5 b and the base part 6 are used as main heat transfer paths (third heat transfer paths 53) outside the illumination lamp 1. Communicated. Thereby, it can suppress that the operating temperature of the electrolytic capacitor 13 rises.

  As described above, the heat generated from the first heat generation area 41 and the heat generated from the second heat generation area 42 and the third heat generation area 43 are transmitted to different portions, and thus the heat is dispersed. . For this reason, the heat which generate | occur | produces from the illumination lamp 1 can be thermally radiated efficiently.

  Further, since the electrolytic capacitor 13 is not covered with the filling member 7, the pressure valve 13 a provided in the electrolytic capacitor 13 is suppressed from being blocked by the filling member 7. For this reason, even if the internal pressure of the electrolytic capacitor 13 increases, the pressure valve 13a can be operated normally. In addition, since the electrolytic capacitor 13 is not covered with the filling member 7, the third heating region 43 including the electrolytic capacitor 13 is not filled with the filling member 7. For this reason, the heat generated from the first heat generation region 41 having the largest amount of heat generated by the air around the electrolytic capacitor 13 is suppressed from being transmitted to the electrolytic capacitor 13. That is, the air around the electrolytic capacitor 13 has a heat insulating effect. Furthermore, since the electrolytic capacitor 13 is connected to the resin casing 5 b by the heat conducting member 8, the heat generated from the electrolytic capacitor 13 is transmitted through the heat conducting member 8 and is radiated to the outside of the illumination lamp 1. The

  In this embodiment, the portion other than the terminal (lead) of the electrolytic capacitor 13 is not covered with the filling member 7, but other than the pressure valve 13 a of the electrolytic capacitor 13 according to the design specification of the illumination lamp 1. It is also possible to configure such that the portion is covered with the filling member 7.

(Lighting device 2)
Next, the illuminating device 2 provided with the illumination lamp 1 which concerns on this Embodiment 1 is demonstrated. FIG. 5 is a schematic diagram showing the illumination device 2 according to the first embodiment. As shown in FIG. 5, the lighting device 2 is attached to, for example, a ceiling, and the ceiling fixture mounting portion 34 is provided with a hole of a size that can store the lighting lamp 1. It has become. The appliance main body 31 is provided with a socket 32 to which the illumination lamp 1 is attached at the back. By attaching the base portion 6 of the illumination lamp 1 to the socket 32, the illumination lamp 1 is attached to the appliance main body 31. Installed. A dome-shaped reflector 33 for reflecting the light emitted from the illumination lamp 1 is provided on the inner wall of the instrument main body 31.

  In this illuminating device 2, the heat generated from the first heat generating region 41 in the illumination lamp 1 passes through the metal housing portion 5 a to the outside of the illumination lamp 1, that is, between the illumination lamp 1 and the reflector 33 in the instrument body 31. Transmitted to the air between. Further, the heat generated from the second heat generation region 42 passes through the base portion 6 to the socket 32 and is transmitted to the instrument main body 31. The heat generated from the third heat generating area 43 also reaches the socket 32 through the base 6 and is transmitted to the instrument body 31.

  As described above, in the illumination lamp 1, the heat generated from the first heat generation region 41 having the highest heat generation amount is transmitted to the air, and the second heat generation region having a heat generation amount lower than that of the first heat generation region 41. The heat generated from 42 and the third heat generating region 43 is transmitted to the instrument body 31. That is, the heat generated from the first heat generation area 41 and the heat generated from the second heat generation area 42 and the third heat generation area 43 are transmitted to different portions, and thus the heat is dispersed. For this reason, the heat which generate | occur | produces from the illumination lamp 1 can be thermally radiated efficiently.

(Modification)
Next, the illumination lamp 1 which concerns on the modification of Embodiment 1 is demonstrated. FIG. 6 is a cross-sectional view showing an illumination lamp 1 according to a modification of the first embodiment. In the illumination lamp 1 according to this modification, the mounting position of the electrolytic capacitor 13 on the circuit board 12 is different from that in the first embodiment, and the rest is common to the first embodiment. As shown in FIG. 6, the electrolytic capacitor 13 has a cylindrical shape, and the circuit board is arranged such that the radial direction (arrow Z direction) and the longitudinal direction of the circuit board 12 (arrow Z direction) are parallel to each other. 12 is mounted. The electrolytic capacitor 13 and the circuit board 12 are bonded to each other by an adhesive member 21.

  Also in the present modification, the electrolytic capacitor 13 is not covered with the filling member 7 and is connected to the resin casing 5b by the heat conducting member 8, and thus has the same effect as in the first embodiment.

  As mentioned above, although embodiment of this invention was described, said embodiment does not limit this invention.

  DESCRIPTION OF SYMBOLS 1 Illumination lamp, 2 illuminating device, 3 light source, 3a LED, 3b LED board, 4 globe, 5 housing | casing, 5a metal housing | casing part, 5b resin housing | casing part, 6 base part, 6a through hole, 6b center electrode 7 Filling member, 8 Thermal conduction member, 11 Lighting circuit unit, 12 Circuit board, 13 Electrolytic capacitor, 13a Pressure valve, 21 Adhesive member, 31 Instrument body, 32 Socket, 33 Reflector, 34 Instrument mounting part, 41 First heat generation Area, 42 second heat generation area, 43 third heat generation area, 51 first heat transfer path, 52 second heat transfer path, 53 third heat transfer path.

Claims (5)

A light source;
A circuit board to which the light source is connected on one side and an electrolytic capacitor mounted on the outside of the circuit board surface along the circuit board and having a pressure valve; and a lighting circuit unit for driving the light source;
A cylindrical housing having a base portion installed inside the lighting circuit unit and disposed on the other side of the circuit board ;
In at least part of the lighting circuit unit, the casing is filled so that the pressure valve is exposed, and the heat generated from the lighting circuit unit is dissipated to the casing, and a filling member
Wherein the electrolytic capacitor is connected to a housing, the heat generated from the electrolytic capacitor, have a, a heat conduction member for radiating to the housing,
The illumination lamp is characterized in that the electrolytic capacitor is located between the light source and the circuit board . The illumination lamp according to claim 1, wherein the electrolytic capacitor is exposed from the filling member. The housing is
A cylindrical metal housing part on which the light source is mounted on an end surface and which forms an outer shell of the housing;
Anda plastic housing part provided inside the metal casing,
The base part is
The resin casing is connected to the metal casing and electrically claim 1 or claim 2 illumination lamp according to, characterized in that that is insulated. It has an illumination lamp as described in any one of Claims 1-3. The illuminating device characterized by the above-mentioned. Forming a lighting circuit unit for driving the light source to the electrolytic capacitor, and the light source along the circuit board on the outside of the connected circuit board surface mounted on one with a pressure valve,
Installing the lighting circuit unit inside a cylindrical casing having a cap portion disposed on the other side of the circuit board ;
Filling the inside of the housing with a heat conductive filling member so that the pressure valve is exposed while covering at least a part of the lighting circuit unit;
Wherein between the electrolytic capacitor and the housing, is interposed a thermally conductive member having thermal conductivity, have a, a step for connecting the electrolytic capacitor and the housing,
The method of manufacturing an illumination lamp, wherein the electrolytic capacitor is located between the light source and the circuit board .

Images