JP2009009804A - Lighting device - Google Patents

Abstract

An object of the present invention is to prevent concentration of heat sources and uneven weight due to concentration of circuit components in a power supply circuit section in one place, and also to distribute the space occupied by circuit components to reduce the thickness of products and the freedom of design. Provided is a lighting device capable of increasing the brightness.
A power supply circuit unit that supplies power to LEDs 3, 3, 3,... Is divided into a plurality of parts and distributed, thereby generating high-temperature heat during use and having a considerable weight. Concentration of heat source and weight deviation due to circuit components of
[Selection] Figure 2

Description

  The present invention relates to a lighting device including a light source and a power supply circuit unit that supplies power to the light source.

  In general, incandescent bulbs, fluorescent lamps, and light-emitting diodes (hereinafter referred to as LEDs) are widely known as light sources for lighting devices.

  In particular, with the development of blue LEDs, a single-chip white LED composed of a blue LED and a phosphor that emits yellow light when excited by blue light is used, and mixed light from two or more LEDs is used. White LEDs such as multi-chip white LEDs have been commercialized. Recently, the use of LEDs as a light source for lighting devices has been rapidly increasing due to the characteristics of LEDs that are small and power-saving.

  As an example of the application of the LED to the lighting device, there is an LED lighting device that can maintain the appearance of the existing fluorescent lamp by providing the LED in the tube of the lighting device and can utilize the existing fluorescent lamp lighting device. .

  For example, in Patent Document 1, an AC / DC converter for providing a support plate in which a plurality of white LEDs are arranged on one surface in a transparent cylindrical pipe and lighting the white LEDs on the other surface of the support plate, A fluorescent lamp type LED lighting apparatus provided with a power supply circuit such as a voltage control unit is proposed.

  Moreover, in patent document 2, it is equipped with the LED device which provided several LED in the translucent member, and the lighting device for making the said LED provided with a circuit board and an electronic component light-emit on the one end part side of this LED device ( An LED lighting device provided with a power circuit is proposed.

The LED lighting devices described in Patent Documents 1 and 2 have one power supply circuit unit for driving the LED, and are provided on one side of the support plate on which the LED is provided or one end of the lighting device. .
JP 2001-351402 A JP 2004-30929 A

  However, in the LED lighting device, circuit components such as a transformer and a resistor are included in a power supply circuit unit for supplying power. Each of these circuit components emits high-temperature heat during use of the lighting device and has a considerable weight, so that the heat source and the weight are concentrated on the power supply circuit unit. Therefore, there is a problem of overheating due to concentration of heat sources, and for example, in a so-called pendant lighting device suspended from the ceiling, it is necessary to consider the balance of the lighting device when designing. Such a problem becomes more serious as the brightness of the lighting device increases. For example, when the brightness of the lighting device is changed from 20 W to 60 W, the power consumption increases and the capacity of the transformer also increases. However, since the transformer increases with the capacity, the above-described problem of concentration of heat source and weight is further caused. There is also a problem that the size of the lighting device is increased.

  Further, in the fluorescent lamp type LED lighting device of Patent Document 1, a plurality of white LEDs are arranged on one surface of a support plate and a power circuit is provided on the other surface of the support plate. The concentrated space occupied by circuit components concentrates on the design of the product and may impair the appearance of the product.

  In addition, in the LED lighting apparatus of patent document 2, since the lighting device (power supply circuit) is provided in the end part of the long tubular LED apparatus which provided several LED, the use as a pendant type lighting apparatus is restrict | limited. There is a problem. Furthermore, in such a lighting device that has a power circuit at one end and is unevenly provided with a portion that does not emit light (power circuit) being evenly distributed to the lighting device, if a plurality of lighting devices are provided on the ceiling, the light emission The part that did not stand out.

  The present invention has been made in view of such circumstances, and the object of the present invention is that the circuit components are concentrated in one place by dividing the power supply circuit portion into a plurality of portions. It is an object of the present invention to provide a lighting device that can prevent concentration of heat sources and uneven weight, and distribute the space occupied by circuit components to reduce the thickness of products and increase the degree of design freedom.

  An illumination device according to the present invention includes a light source and a power supply circuit unit that supplies power to the light source. The power supply circuit unit includes a plurality of power supply circuit components, and the plurality of power supply circuit components are provided in a distributed manner. It is characterized by being able to.

  According to the present invention, it is possible to prevent the heat source concentration and weight unevenness due to the concentration of the power supply circuit components constituting the power supply circuit portion in one place of the lighting device, and to disperse the space occupied by the power supply circuit portion. The product can be made thinner and the degree of design freedom can be improved.

  An illumination device according to the present invention includes a plurality of light sources and a power supply circuit unit that supplies power to the light sources. The power supply circuit unit includes a plurality of partial power supply circuit units, and the plurality of partial power supply circuit units. Are provided in a distributed manner, and each supplies power independently to a part of the plurality of light sources.

  According to the present invention, it is possible to prevent the concentration of the heat source and the uneven weight due to the concentration of the partial power supply circuit portion constituting the power supply circuit portion at one place of the lighting device, and to distribute the space occupied by the power supply circuit portion. The product can be made thinner and the degree of design freedom can be improved. Further, even if one of the partial power supply circuit units is turned off due to a failure or the like, other light sources can be turned on.

  An illumination device according to the present invention includes a light source, a power supply circuit unit that supplies power to the light source, and a sensor unit such as an illuminance sensor that measures the illuminance of the light source. The power supply circuit unit and the sensor unit are dispersed. It is characterized by being provided.

  According to the present invention, even in a lighting device having a sensor unit, the weight of circuit components and the like is prevented from being unevenly distributed, and portions that do not emit light (power supply circuit unit and sensor unit) are evenly distributed and arranged in the lighting device. Therefore, even if a plurality of lighting devices are installed on the ceiling or the like, the portion that does not emit light can be made inconspicuous.

  The illumination device according to the present invention is further characterized in that the plurality of power supply circuit components, the plurality of partial power supply circuit units or the power supply circuit unit and the sensor unit provided in a distributed manner are arranged at symmetrical positions.

  According to the present invention, it is possible to prevent the weight of circuit components and the like from being deviated, and to dispose a portion that does not emit light (power supply circuit portion and / or sensor portion) evenly distributed in the lighting device. Even if this illumination device is installed, it is possible to make the portion that does not emit light inconspicuous.

  The lighting device according to the present invention is further characterized in that the light source is an LED.

  According to the present invention, it is possible to disperse and arrange power supply circuit units that supply power to LEDs, and to reduce the thickness of the lighting device.

  The illumination device according to the present invention is further characterized in that a transformer is included in the power supply circuit unit.

  According to the present invention, in particular, by dispersing a large transformer in the power circuit section, the capacity per transformer can be reduced, the size of the power circuit section can be suppressed, and the lighting device can be made thinner. It becomes possible.

  The lighting device according to the present invention is further a lighting device in which a plurality of light sources are arranged in series, and the power supply circuit unit and / or the sensor unit are distributed and arranged at both ends in the longitudinal direction of the lighting device. It is characterized by that.

  According to the present invention, in an illuminating device in which a plurality of light sources are arranged in series, concentration of heat sources and uneven weight can be prevented, and the space occupied by the power supply circuit unit and / or the sensor unit can be dispersed to reduce the thickness of the product. And design freedom.

  According to the present invention, it is possible to prevent concentration of heat sources and uneven weight due to concentration of circuit components in the power supply circuit unit in one place, and also to distribute the space occupied by the circuit components to reduce the thickness and design of the product. Of freedom.

(Embodiment 1)
Embodiment 1 of the present invention will be described below with reference to the drawings. 1 is an external view of a lighting device according to Embodiment 1 of the present invention, FIG. 2 is an exploded cross-sectional view of a main part taken along line II-II in FIG. 1, and FIG.

  The lighting device according to the first embodiment supplies a plurality of LEDs 3, 3, 3,..., A substrate 2 on which the LEDs 3, 3, 3,. The light source circuit portion 5 including two partial power supply circuit portions 5a and 5b, the LEDs 3, 3, 3,..., The housing member 1 that houses the substrate 2 and the power supply circuit portion 5, and the LEDs 3, 3, 3,. And a translucent portion 4 for light emission.

  The housing member 1 is a flat rectangular parallelepiped housing. The housing member 1 includes a rectangular bottom plate 12, long side walls 13 and 13 extending in a direction orthogonal to the bottom plate 12 from both long side edges of the bottom plate 12, and bottom plate 12 from both short side edges of the bottom plate 12. It has short side walls 14 and 14 extending in a direction orthogonal to each other, and has an opening 11 on the opposite side of the bottom plate 12. Through holes 14a and 14a for screwing the translucent part 4 are provided in the center of the edge of the short side walls 14 and 14, and the partial power supply circuit part 5a and Through holes 12a, 12a, 12a, 12a and through holes 12b, 12b, 12b, 12b for screwing 5b are provided, respectively. The bottom plate 12, the long side walls 13, 13 and the short side walls 14, 14 are made of aluminum and are formed as a pair.

  Eight substrates 2, 2, 2,... Are screwed inside the bottom plate 12 of the housing member 1. Each substrate 2 has a rectangular shape and is made of an epoxy resin containing glass fibers. Three LED rows composed of a plurality of LEDs 3, 3, 3,... Are mounted on one surface of each substrate 2 in the longitudinal direction. The eight substrates 2, 2, 2,... Are arranged side by side in the longitudinal direction to form two substrate rows M1, M2, and are arranged along the longitudinal direction of the bottom plate 12. A terminal 6 is provided between the two substrate rows M1 and M2, and an electric wire wired in the housing member 1 from the outside is connected through a through hole 15 provided in the center of the bottom plate 12. An insulating sheet 7 (for example, polyphenylene sulfide resin) having thermal conductivity and insulation is interposed between the substrates 2, 2, 2,. Thereby, the heat generated in the LEDs 3, 3, 3,... Is transmitted to the housing member 1 through the substrates 2, 2, 2,.

  Two partial power supply circuit portions 5a and 5b for independently supplying power to the LEDs 3, 3, 3,... Are provided on both ends of the two substrate rows M1, M2, respectively. The partial power supply circuit units 5a and 5b are each provided with various circuit components such as a transformer, a resistor, and a capacitor, and are covered with covers 51a and 51b that are rectangular parallelepiped casings. The partial power supply circuit portions 5a and 5b are provided with fixing rods 52a and 52b extending in the surface direction at the edge of the surface facing the bottom plate 12, and the partial power supply circuit portions 5a and 5b are screwed to the bottom plate 12 in the fixing rods 52a and 52b. Through holes 53a, 53a, 53a, 53a and through holes 53b, 53b, 53b, 53b for stopping are respectively provided. The bottom plate 12 has through holes 12a, 12a, 12a, 12a and through holes 12b, 12b, 12b, 12b at positions facing the through holes 53a, 53a, 53a, 53a and the through holes 53b, 53b, 53b, 53b. These are provided, and male screws are inserted into these through holes, and the partial power supply circuit portions 5 a and 5 b are screwed to the bottom plate 12.

  The partial power supply circuit unit 5a is configured to supply power to one of the two substrate rows M1 and M2, and the partial power supply circuit portion 5b to supply power to the other substrate row M2. . That is, the power supply circuit units are not concentrated in one place, and the partial power supply circuit unit 5a and the partial power supply circuit unit 5b are distributed and arranged in a divided manner. Therefore, compared to the case where the power supply circuit section is not dispersed, the amount of heat generated per circuit component such as a transformer and a resistor is reduced, and the size of these circuit components is also reduced. That is, the reduction and dispersion of the heat generation can alleviate the problem of overheating that can occur from the concentration of the heat source, and the reduction of the space occupied by these circuit components can reduce the thickness. In particular, the size of the power supply circuit section depends on the size of the transformer because the transformer is large among circuit components. However, the capacity per transformer is reduced by providing a plurality of transformers by distributing the power supply circuit section. Thus, the size of the power supply circuit portion can be suppressed, and the lighting device can be thinned. Further, since the power supply circuit portions are arranged in a distributed manner without being concentrated in one place, the entire lighting device is balanced without being deviated in weight, and can be used as a pendant lighting device. In particular, as in the present embodiment, it is preferable that the lighting apparatuses are installed so as to have symmetry such as both ends.

  The partial power supply circuit portions 5a and 5b are provided on the same surface as the surface on which the substrate 2 of the housing member 1 is provided. Therefore, the board | substrate 2 and LED3 can be accommodated in the space between the accommodating member 1 and the translucent part 4 which arise by providing the power supply circuit part 5. FIG.

  The translucent part 4 covers the opening 11 of the housing member 1 and transmits light from the LEDs 3, 3, 3,. The translucent portion 4 is made of milky white polycarbonate resin excellent in impact resistance and heat resistance, and has a curved plate 41 curved in a tunnel shape and semicircular side walls 43 and 43 for sealing both ends of the curved plate 41. Yes. Inside the curved plate 41, there is provided a microlens sheet 42 on which a large number of minute lenses are formed so as to diffuse light so that light that enters the light transmitting portion 4 and exits to the outside is uniformly emitted. Yes. Therefore, the light incident on the translucent portion 4 is emitted to the outside with reduced glare and non-uniformity due to light flux variation. On the other hand, semi-circular fixing claws 44a and 44b for fixing the translucent portion 4 to the housing member 1 are extended at the edges of the side walls 43 and 43, and the central portions of the fixing claws 44a and 44b are extended. Through holes 45 and 45 are provided, respectively. On the short side walls 14 and 14 of the housing member 1, through holes 14 a and 14 b are respectively provided at positions facing the through holes 45 and 45 of the fixing claws 44 a and 44 b, and male screws are inserted into these through holes. Thus, the translucent portion 4 is screwed to the housing member 1.

  FIG. 4 is an electric circuit diagram of the lighting apparatus according to Embodiment 1 of the present invention. For convenience of explanation, the LEDs 3, 3, 3,... Of the substrate row M1 (indicated by dotted lines in the figure) and the partial power supply circuit portion 5a for supplying power to the LEDs 3, 3, 3,. The electrical structure of the lighting apparatus according to Embodiment 1 of the present invention will be described with reference to FIG.

  The commercial AC voltage is supplied to the partial power supply circuit unit 5a via the terminal 6, and the partial power supply circuit unit 5a supplies power to the LEDs 3, 3, 3,. The partial power supply circuit unit 5a is connected to the terminal 6 via the current fuses F1 and F2. The current fuses F1 and F2 are quickly blown when an overcurrent is generated, and the circuit is protected from smoke and fire. The partial power supply circuit unit 5a includes coils L1 and L2 that smooth the voltages from the current fuses F1 and F2, a diode bridge D1 that full-wave rectifies the smoothed voltage, and currents (pulses) from the diode bridge D1. Conversion part P1 which converts a wave) into alternating current. The conversion unit P1 includes a field effect transistor FET, a control unit IC1 that controls switching of the field effect transistor FET and converts an AC frequency, a resistor R1, and a resistor R2. Furthermore, the partial power supply circuit unit 5a includes a transistor T1 that steps down the voltage converted into alternating current, a diode D2 and a capacitor C1, a half wave rectification unit P2 that rectifies the stepped down voltage in half waves, and a stabilization circuit P3. It has. The stabilization circuit P3 includes a shunt regulator IC2, a resistor R3, a resistor R4, and a resistor R5. The shunt regulator IC2 includes a transistor, and suppresses an increase in output voltage by adjusting a current flowing through the transistor. The partial power supply circuit unit 5a includes a photocoupler PC1 including an LED and a phototransistor. In the photocoupler PC1, the LED emits light by a current flowing between the resistor R3 and the shunt regulator IC2, and the phototransistor is turned on by the light of the LED, and sends an electric signal to the control unit IC1. The control unit IC1 controls the switching of the field effect transistor FET according to the electrical signal from the photocoupler PC1.

  In the first embodiment, when power is supplied, the partial power supply circuit unit 5a and the partial power supply circuit unit 5b simultaneously supply power, and the LEDs 3, 3, 3,. However, the present invention is not limited to this, and is configured by separately providing a control unit that can individually control the partial power supply circuit unit 5a and the partial power supply circuit unit 5b. Only one of the LEDs M3, 3, 3,... May be turned on independently.

  In this case, even if one of the partial power supply circuit sections is turned off due to a failure or the like, the LED of the other board row can be turned on. Further, the control of the partial power supply circuit unit may be switched by the user's operation, and the operation unit may be provided so that the brightness can be adjusted by adjusting the luminance of the lighting device.

  In the present embodiment, a plurality of partial power supply circuit units are distributed corresponding to the substrate row, but the present invention is not limited to this, and each partial power supply circuit is independently powered by a part of the plurality of LEDs. As long as it can be supplied. For example, power may be supplied alternately from a plurality of partial power supply circuit units to a plurality of LEDs mounted on the substrate 2 in a matrix. In this case, even if the lighting device is driven by only one partial power supply circuit unit, light is emitted from the entire surface of the substrate. Therefore, even if a highly directional LED is a light source, an irradiation range is ensured.

(Embodiment 2)
FIG. 5 is a perspective view of the lighting device according to Embodiment 2 of the present invention with the light transmitting portion 4 separated. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The housing member 1 of the lighting apparatus according to Embodiment 2 is a flat rectangular parallelepiped casing. The housing member 1 has a rectangular bottom plate 12 and rectangular side walls 13, 13, 14, 14 extending from each edge of the bottom plate 12 in a direction orthogonal to the bottom plate 12, and is opened on the opposite side of the bottom plate 12. 11. Each side wall 13, 13, 14, 14 is provided with two through holes 13 a, 13 a or through holes 14 a, 14 a for screwing the translucent part 4 at the apex portion on the bottom plate 12 side. The bottom plate 12 and the side walls 13, 13, 14, and 14 are made of aluminum and are formed as a pair.

  Inside the bottom plate 12 of the housing member 1, four rectangular substrates 2 a, 2 b, 2 c, 2 d are arranged side by side at appropriate intervals in the width direction. The substrates 2a, 2b, 2c and 2d are made of an epoxy resin containing glass fibers. Three LED rows composed of a plurality of LEDs 3, 3, 3,... Are mounted on one surface of each substrate 2a, 2b, 2c, 2d in the longitudinal direction of the substrates 2a, 2b, 2c, 2d. An insulating sheet (not shown) made of polyphenylene sulfide resin having thermal conductivity and insulation is interposed between the substrates 2a, 2b, 2c, 2d and the bottom plate 12. Thereby, the heat generated in the LEDs 3, 3, 3,... Is transmitted to the housing member 1 through the substrates 2a, 2b, 2c, 2d and the insulating sheet, and is radiated into the air.

  Four partial power supply circuits that supply power independently to the LEDs 3, 3, 3,... Of the respective substrates 2a, 2b, 2c, 2d on both ends in the longitudinal direction of the four substrates 2a, 2b, 2c, 2d Portions 5a, 5b, 5c, and 5d are provided. The four partial power supply circuit units 5a, 5b, 5c, and 5d are covered with covers 51a, 51b, 51c, and 51d, which are rectangular parallelepiped housings, respectively. The four partial power supply circuit portions 5a, 5b, 5c, and 5d are arranged in a distributed manner on both ends in the longitudinal direction of the substrates 2a, 2b, 2c, and 2d. , 51b, 51c, 51d are provided at appropriate intervals in the longitudinal direction.

  The partial power supply circuit unit 5a supplies power to the LEDs 3, 3, 3,... Of the four substrates 2a, 2b, 2c, 2d, and the partial power supply circuit unit 5b includes the LEDs 3, 3, 3,. Is supplied with power, the partial power supply circuit unit 5c supplies power to the LEDs 3, 3, 3,... Of the substrate 2c, and the partial power supply circuit unit 5d supplies power to the LEDs 3, 3, 3,. It is configured as follows. In other words, the power supply circuit units are not concentrated in one place, and the partial power supply circuit unit 5a, the partial power supply circuit unit 5b, the partial power supply circuit unit 5c, and the partial power supply circuit unit 5d are distributed in a distributed manner. Therefore, compared to the case where the power supply circuit section is not dispersed, the amount of heat generated per circuit component such as a transformer and a resistor is reduced, and the size of these circuit components is also reduced. That is, the reduction and dispersion of the heat generation can alleviate the problem of overheating that can occur from the concentration of the heat source, and the reduction of the space occupied by these circuit components can reduce the thickness. In addition, since the power supply circuit units are arranged in a distributed manner without being concentrated in one place, the entire lighting device is balanced without being deviated in weight, and can be used as a pendant lighting device.

  The translucent part 4 covers the accommodating part 1, and transmits the light of the LEDs 3, 3, 3,. The translucent part 4 is made of milky white polycarbonate resin excellent in impact resistance and heat resistance, and is a rectangular parallelepiped housing having an opening (not shown) opposite to the opening 11 of the housing member 1. The opening of the light transmitting portion 4 has a shape that follows the opening 11 of the housing member 1, and the housing member 1 is fitted into the light transmitting portion 4. The translucent part 4 is an edge on the opening side, and when the accommodating member 1 is fitted in the translucent part 4, the position facing the through holes 13 a, 13 a,..., 14 a, 14 a,. Are provided with through holes 45, 45, 45. .. And 14a, 14a,... And through holes 45, 45, 45... Of the housing member 1 and the translucent portion 4 is screwed to the housing member 1.

(Embodiment 3)
FIG. 6 is a perspective view of the lighting device according to Embodiment 3 of the present invention with the light transmitting portion 4 separated. The same parts as those in the first and second embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

  The housing member 1 of the lighting apparatus according to Embodiment 3 is a flat cylindrical housing. The housing member 1 has a circular bottom plate 12 and a peripheral wall 13 extending from the edge of the bottom plate 12 in a direction orthogonal to the bottom plate 12, and has an opening 11 on the opposite side of the bottom plate 12. On the outer peripheral surface of the peripheral wall 13, a male screw portion 131 is provided for the translucent portion 4 to be detachably screwed. The bottom plate 12 and the peripheral wall 13 are made of aluminum and are formed as a pair.

  On the inner side of the bottom plate 12 of the housing member 1, four substrates 2a, 2b, 2c, 2d that are fan-shaped in plan view are radially arranged around the same axis, forming a substantially disk shape. Yes. The substrates 2a, 2b, 2c and 2d are made of an epoxy resin containing glass fibers. A plurality of LEDs 3, 3, 3,... Are mounted on one surface of each substrate 2a, 2b, 2c, 2d. An insulating sheet (not shown) made of polyphenylene sulfide resin having thermal conductivity and insulation is interposed between the substrates 2a, 2b, 2c, 2d and the bottom plate 12. Thereby, the heat generated in the LEDs 3, 3, 3,... Is transmitted to the housing member 1 through the substrates 2a, 2b, 2c, 2d and the insulating sheet, and is radiated into the air.

  Between the four substrates 2a, 2b, 2c, 2d and the peripheral wall 13, four partial power supply circuit units for independently supplying power to the LEDs 3, 3, 3,... Of each substrate 2a, 2b, 2c, 2d 5a, 5b, 5c, 5d are provided. The four partial power supply circuit portions 5a, 5b, 5c, and 5d are covered by covers 51a, 51b, 51c, and 51d, which are cases that are curved along the inside of the peripheral wall 13, and are respectively covered with the substrates 2a, 2b, 2c, and 2d. It is installed around. The partial power supply circuit portions 5a, 5b, 5c, and 5d are distributed and arranged at regular intervals in the circumferential direction of the peripheral wall 13.

  The partial power supply circuit unit 5a supplies power to the LEDs 3, 3, 3,... Of the four substrates 2a, 2b, 2c, 2d, and the partial power supply circuit unit 5b includes the LEDs 3, 3, 3,. Is supplied with power, the partial power supply circuit unit 5c supplies power to the LEDs 3, 3, 3,... Of the substrate 2c, and the partial power supply circuit unit 5d supplies power to the LEDs 3, 3, 3,. It is configured as follows. In other words, the power supply circuit units are not concentrated in one place, and the partial power supply circuit unit 5a, the partial power supply circuit unit 5b, the partial power supply circuit unit 5c, and the partial power supply circuit unit 5d are distributed in a distributed manner. Therefore, compared to the case where the power supply circuit section is not dispersed, the amount of heat generated per circuit component such as a transformer and a resistor is reduced, and the size of these circuit components is also reduced. That is, the reduction and dispersion of the heat generation can alleviate the problem of overheating that can occur from the concentration of the heat source, and the reduction of the space occupied by these circuit components can reduce the thickness. In addition, since the power supply circuit units are dispersedly arranged without being concentrated in one place, the entire lighting device is balanced without being deviated in weight, and can be used as a pendant lighting device.

  The translucent part 4 covers the housing member 1 and transmits the light from the LEDs 3, 3, 3,. The translucent part 4 is made of milky white polycarbonate resin excellent in impact resistance and heat resistance, and is a cylindrical casing having an opening (not shown) opposite to the opening 11 of the housing member 1. The opening of the light transmitting portion 4 has a shape that follows the opening 11 of the housing member 1, and the housing member 1 is screwed into the light transmitting portion 4. The translucent part 4 is provided with an internal thread part (not shown) for screwing with the male thread part 131 of the housing member 1 inside the opening side, and the internal thread part of the translucent part 4 and the housing member 1 The translucent part 4 is fixed to the housing member 1 by screwing of the male screw part 131.

  As described above, in Embodiments 1 to 3, the power supply circuit unit includes a plurality of partial power supply circuit units, and each of the partial power supply circuit units partially supplies power to a part of the light source by way of example. Explained. However, there may be one power supply circuit unit that supplies power to the light source, and a plurality of power supply circuit components constituting the power supply circuit unit may be provided in a distributed manner. Even in this case, the heat source concentration and weight unevenness due to the concentration of the circuit components in one place are prevented, and the space occupied by the circuit components is dispersed, making the product thinner and the freedom of design. It is possible to increase.

  The lighting device may include a sensor unit such as an illuminance sensor that detects the illuminance around the lighting device or a human sensor that senses a person using infrared rays, and the power supply circuit unit and the sensor unit may be provided in a distributed manner. . Even in this case, it is possible to prevent the weight of circuit components and the like from being unevenly distributed and to disperse the portions that do not emit light (power supply circuit portion and sensor portion) evenly distributed in the lighting device. Even if a plurality of lighting devices are installed on the ceiling or the like, it is possible to make the portion that does not emit light inconspicuous.

It is an external view of the illuminating device which concerns on Embodiment 1 of this invention. It is a principal part exploded sectional view by the II-II line of FIG. It is a principal part disassembled perspective view of the illuminating device which concerns on Embodiment 1 of this invention. It is an electric circuit diagram of the illuminating device which concerns on Embodiment 1 of this invention. It is a perspective view of the state which isolate | separated the translucent part of the illuminating device which concerns on Embodiment 2 of this invention. It is a perspective view of the state which isolate | separated the translucent part of the illuminating device which concerns on Embodiment 3 of this invention.

Explanation of symbols

1 Housing member 2 Substrate 3 LED
5 Power supply circuit part 5a, 5b Partial power supply circuit part

Claims (7)

In a lighting device including a light source and a power supply circuit unit that supplies power to the light source,
The lighting device according to claim 1, wherein the power supply circuit unit includes a plurality of power supply circuit components, and the power supply circuit components are provided in a distributed manner. In an illuminating device including a plurality of light sources and a power supply circuit unit that supplies power to the light sources
The power supply circuit unit is composed of a plurality of partial power supply circuit units,
The plurality of partial power supply circuit units are provided in a distributed manner, and each supplies power independently to a part of the plurality of light sources. In a lighting device including a light source, a power supply circuit unit that supplies power to the light source, and a sensor unit such as an illuminance sensor that measures the illuminance of the light source,
The power supply circuit unit and the sensor unit are provided in a distributed manner.   The plurality of power supply circuit components, the plurality of partial power supply circuit units, or the power supply circuit unit and the sensor unit provided in a distributed manner are arranged at symmetrical positions. The lighting device according to one.   The lighting device according to claim 1, wherein the light source is an LED.   The lighting device according to claim 1, wherein the power supply circuit unit includes a transformer. The lighting device according to any one of claims 1 to 6,
A lighting device in which a plurality of light sources are arranged in series, wherein the power supply circuit unit and / or the sensor unit are distributed and arranged at both ends in the longitudinal direction of the lighting device.

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