JP2010257590A - Power supply unit and lighting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power source unit restraining intrusion of dust or moisture into a power source terminal stage, and with high safety, and a lighting system using the power source unit. <P>SOLUTION: The power source unit 10 is provided with a case body 12, a terminal stage mounting part 12b extended and fitted to the case body 12 and with a terminal stage mounting means 12a penetrating through top to bottom formed, a power source circuit 11 fitted to the case body 12, a power source terminal stage 14 fitted to a lower surface side of the terminal stage mounting part 12b through the terminal stage mounting means 12a, and a cover member 13 fitted to the case body 12 so as to cover the power source circuit 11 and the terminal stage mounting means 12a. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a power supply unit suitable for supplying electric power to a luminaire used by being embedded in a ceiling or the like, and a lighting device using the power supply unit.

  Conventionally, for example, in a lighting fixture that is used by being embedded in a ceiling or the like, a power supply unit is connected to supply power to the light source. The power supply unit is provided with a power supply terminal block to which a commercial power supply line is connected (see, for example, Patent Document 1).

JP-A-2005-346953

  However, in the conventional power supply unit, the power supply terminal block is exposed on the outer surface, and dust and moisture enter the terminal block, resulting in a short circuit, and contact failure etc. When the terminal block is overheated and becomes high temperature, especially when the terminal block is made of synthetic resin or the like, there is a possibility of melting or igniting and a fire.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a highly safe power supply unit and a lighting device using the power supply unit by suppressing dust and water from entering the power supply terminal block. To do.

  The power supply unit according to claim 1 includes: a case main body; a terminal block attaching portion formed on the case main body and having terminal block attachment means extending vertically through the case main body; a power supply circuit attached to the case main body; A power terminal block attached to the lower surface side of the terminal block attaching member via the terminal block attaching means; a cover member attached to the case main body so as to cover the power circuit and the terminal block attaching means; It is characterized by comprising.

  In the present invention and the following inventions, definitions and technical meanings of terms are as follows unless otherwise specified. The terminal block attaching means includes, for example, those designated as through holes, slits, notches or the like through which fixing means such as screws pass. The power supply unit can be applied to various electric devices such as a lighting device.

  The power supply unit according to claim 2 is the power supply unit according to claim 1, wherein a plurality of the terminal block mounting means are formed so that a plurality of types of power supply terminal blocks can be attached. And

  According to a third aspect of the present invention, there is provided the power supply unit according to the first or second aspect, wherein the case body is provided with a base for installation.

  The illuminating device according to claim 4 comprises: a luminaire main body having a light source; and the light source unit according to any one of claims 1 to 3 connected to the luminaire main body. And As the light source, an LED, an incandescent bulb, a fluorescent lamp, a high-intensity discharge lamp, or the like can be applied, and the type of the light source is not particularly limited.

  According to the first aspect of the present invention, it is possible to provide a power supply unit that can prevent dust and water from entering the power supply terminal block, has high safety, and can simplify the configuration and assembly work.

  According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, different types of power terminal blocks can be attached, and the components can be shared.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, it is possible to stably install the apparatus in a proper posture, and the safety can be further improved. .

  According to invention of Claim 4, the illuminating device which has the effect as described in each claim can be provided.

It is a perspective view which shows the lighting fixture which concerns on the 1st Embodiment of this invention. It is a front view which shows the same illuminating device. It is a perspective view which shows the power supply unit. It is a perspective view which decomposes | disassembles and shows the power supply unit. It is a top view which shows the power supply unit. It is the front view, left view, and right view which show the power supply unit. It is a bottom view which shows the power supply unit. It is a top view which removes and shows the cover member of the power supply unit. It is a connection diagram which shows the connection state of the illumination device. It is a top view which shows the illuminating device which concerns on the 2nd Embodiment of this invention. It is a top view which shows the illuminating device which concerns on the 3rd Embodiment of this invention. It is a top view which shows the illuminating device which concerns on the 4th Embodiment of this invention.

  Hereinafter, a power supply unit and a lighting device according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 9. FIG. 1 is a perspective view showing a ceiling-embedded downlight body 1 as a lighting fixture. The downlight body 1 is mounted with a thermally conductive tubular body 2, a decorative frame 3 attached to the tubular body 2, and an LED 4 as a light source that is attached to the inside of the tubular body 2. And a translucent cover 7 disposed in front of the reflector 6. A power receiving connector 8 is disposed on the upper outer surface of the cylindrical main body 2, and a pair of leaf springs 9 for attachment are mounted on the decorative frame 3.

  The cylindrical main body 2 is formed of a material having good heat conductivity made of aluminum die casting, and its outer surface is baked and coated with a white melamine resin-based paint. Of course, other materials may be used as long as thermal conductivity can be ensured. A plurality of heat radiation fins 2 a extending in the vertical direction are formed on the outer surface of the cylindrical main body 2.

  The decorative frame 3 is formed of an ABS resin in a substantially umbrella shape, an annular flange 3a is formed at the end of the divergent opening, and the other end is attached to the cylindrical main body 2.

  A plurality of LEDs 4 serving as light sources are mounted on the surface side of the substrate 5 by a surface mounting method. The substrate 5 is made of a substantially circular flat plate made of glass epoxy resin, and is thermally coupled to the cylindrical main body 2. In addition, when the material of the substrate 5 is an insulating material, a ceramic material or a synthetic resin material having relatively good heat dissipation characteristics and excellent durability can be applied. Moreover, when using metal, it is preferable to apply a material having good thermal conductivity such as aluminum and excellent heat dissipation.

  Subsequently, a reflector 6 made of white polycarbonate, ASA resin or the like is disposed on the surface side of the substrate 5. The reflector 6 has a function of efficiently irradiating light emitted from the LEDs 4 by individually controlling light distribution for each LED 4. The power receiving connector 8 is electrically connected to the LED 4 via a terminal provided on the substrate 5, and is provided so as to protrude in the outer peripheral direction of the cylindrical main body 2.

  Next, FIG. 2 shows a state where the downlight main body 1 as a lighting fixture and the power supply unit 10 are installed and connected to the ceiling surface. In the present embodiment, the lighting device is configured by connecting the downlight body 1 and the power supply unit 10.

  The power supply unit 10 supplies power to the light source of the downlight main body 1 and controls the lighting of the light source by its lighting circuit, and has a function of a DC power source that receives a commercial power supply and outputs a predetermined DC voltage. . The power supply unit 10 has a substantially ship shape, and is connected to a case main body 12 to which a power supply circuit 11 is attached, a cover member 13 covering the case main body, and a power line PW (including a ground line) of commercial power. A lead wire 16 having a power supply connector 15 connected to the power terminal block 14 and the power receiving connector 8 of the downlight main body 1 is provided.

  In installing such a lighting device, first, the power line PW wired on the back of the ceiling C is pulled out from the embedding hole H formed in the ceiling C and connected to the power terminal block 14 of the power unit 10. Then, the power feeding connector 15 is connected to the power receiving connector 8 of the downlight main body 1. Next, the power supply unit 10 is inserted from the embedding hole H and disposed behind the ceiling C. Next, the pair of leaf springs 9 for attachment of the downlight body 1 are operated with both hands so as to be squeezed against the elastic force, and the downlight body 1 is inserted through the embedding hole H while supporting the downlight body 1. As the downlight body 1 is inserted into the embedding hole H, the hand is released and the downlight body 1 is pushed up. As a result, the mounting leaf spring 9 returns to the outer side and comes into contact with the back surface of the ceiling C, and the downlight body 1 is pulled upward by this elastic force, so that the flange 3a of the decorative frame 3 becomes the peripheral edge of the embedding hole H. The downlight body 1 is installed on the ceiling C surface.

  Next, the power supply unit 10 will be described in detail with reference to FIGS. The case main body 12 is formed in a substantially rectangular parallelepiped shape by bending a sheet metal, and rises one step from the power supply circuit attachment portion 12a having side walls on both sides and extends by a rectangular flat plate. Terminal block mounting portion 12b formed as described above. In addition, on the end side of the power supply circuit attachment portion 12a and on both sides of the terminal block attachment portion 12b, installation support legs 12c that are bent downward and extend in an L shape are formed.

  The power supply circuit 11 is attached to the power supply circuit attachment portion 12a via insulating paper 11c (see FIG. 4). The power supply circuit 11 includes a circuit board 11a and electric parts 11b such as a control IC, a transformer, a capacitor, and a resistance element mounted on the circuit board 11a. And the lead wire 16 which consists of a power supply connection line and a ground connection line is derived | led-out from the circuit board 11a, and the electric power feeding connector 15 is connected to the front-end | tip part. The power supply connection line and the ground connection line are covered in a bundle with a flexible insulating tube.

  A substantially box-shaped power terminal block 14 and a dimming signal line connecting terminal block 17 formed of synthetic resin are mounted on the lower surface side of the terminal block mounting portion 12b. A description of the connection relationship of the dimming signal lines is omitted. As representatively shown in FIGS. 4 and 8 (the electrical component 11b of the power supply circuit 11 is omitted in the drawing), the power supply terminal block 14 has a plurality of connection terminals for inserting power supply lines. It is arrange | positioned at the lower surface side of the terminal block attaching part 12b, and is being fixed by fixing means, such as the screw 20, from the upper surface side of the terminal block attaching part 12b. Specifically, a screw through hole 21a is formed in the terminal block mounting portion 12b as a terminal block mounting means that penetrates vertically, and is screwed into the power terminal block 14 through the screw through hole 21a. The power terminal block 14 is fastened and fixed by screws 20. In addition, a cylindrical locking boss 14a is formed on the upper surface of the power terminal block 14. On the other hand, the terminal block mounting portion 12b has a terminal so that the locking boss 14a can protrude upward. A through-hole 21b as a table mounting means is formed, and the movement of the power terminal block 14 can be prevented by engaging the locking boss 14a with the through-hole 21b.

  Further, the terminal block attaching portion 12b has screw through holes 21c and 21d as terminal block mounting means that penetrate vertically, and slit-shaped through holes 21e that engage with locking bosses formed on the power terminal block. Is formed. These through holes 21c, 21d and 21e are terminal block attachment means used when a power terminal block of a type different from the power terminal block 14 shown in the present embodiment is mounted. That is, for example, the power terminal block for overseas uses a different form from the power terminal block for domestic use, and the positions where fixing means such as screws are disposed are also different. Therefore, the through holes 21c, 21d, and 21e are formed in order to make the components of the power supply unit 10 for overseas use and Japan use in common and adapt to the installation of the power supply terminal block for overseas use. Therefore, the through holes 21c, 21d, and 21e are not used for mounting the power supply terminal block 14 shown in the present embodiment, but are left as they are as through holes.

  Subsequently, similarly, the terminal block 17 for connecting the dimming signal line is fastened and fixed by a screw 22 penetrating the through hole 22a. Furthermore, in order to make the components of the power supply unit 10 common and adapt to the mounting of the terminal block for connecting the dimming signal line for overseas, the through holes 22b and 22c are formed and are left as they are as the through holes. .

  Next, the cover member 13 is formed by bending a sheet metal in the same manner as the case body 12, and includes a first cover portion 13a having a side wall, and a stepped shape connected to the first cover portion 13a. A second cover portion 13b is provided, and is attached to the case body 12 with screws or the like. The first cover portion 13a covers the power supply circuit 11, and the second cover portion 13b is a terminal block for connecting through holes 21a, 21b, 21c, 21d, 21e as a terminal block mounting means and a dimming signal line connection. The through holes 22a, 22b, and 22c for attaching 17 are covered.

  Here, the 2nd cover part 13b is comprised from the lower step part dw and the upper step part up, and the space for the height dimension is formed inside the upper step part up. With this space, when the cover member 13 is attached to the case body 12, the head of the fixing means such as the screw 20 does not collide with the inner surface side of the cover member 13, so that the protruding height of the head can be absorbed. It has become. Therefore, it becomes possible to attach the lower step portion dw so as to be in close contact with the upper surface of the terminal block attaching portion 12b.

  Next, FIG. 9 shows an example in which a plurality of lighting fixtures are connected to the power supply unit 10. The power feeding connector 15 of the lead wire 16 led out from the power supply unit 10 is connected to the power receiving connector 8 of the lighting fixture. Next, the power feeding connector 15a of the lead wire 16a led out from the lighting fixture is connected to the power receiving connector 8a of the next lighting fixture. By sequentially connecting in this way, a commercial power source is connected to the lighting fixture and power is supplied.

  The operation of the present embodiment configured as described above will be described. When the power supply unit 10 is energized from a commercial power supply, the lighting circuit operates to supply power to the substrate 5 and the LED 4 as a light source emits light. Most of the light emitted from each LED 4 is directly transmitted through the translucent cover 7 and irradiated forward, and a part of the light is reflected on each reflecting surface of the reflector 6 to control the light distribution and the translucent cover 7. Irradiating forward. On the other hand, the heat generated from the LED 4 is transmitted mainly from the substrate 5 to the cylindrical main body 2, further conducted to the entire outer cylindrical main body 2, and dissipated while accompanying heat dissipation in the conduction process.

  Next, the ceiling behind the lighting device is in an environment where dust is likely to accumulate and moisture such as water droplets is likely to be generated due to high humidity. However, in the power supply unit 10 of the present embodiment, the power supply terminal block 14 and the terminal block 17 for connecting the dimming signal line are attached to the lower surface side of the terminal block attachment portion 12b. In addition, the terminal block 17 for connecting the dimming signal line is covered with the terminal block mounting portion 12b, and can prevent intrusion of dust and the like.

  Furthermore, since the terminal block mounting portion 12b is formed with through holes 21a, 21b, 21c, 21d, and 21e as terminal block mounting means that penetrate the top and bottom of the terminal block mounting portion 12b. Alternatively, dust or water may enter directly from the through-hole 21c or the like. However, since these through-holes 21a and the like are covered with the second cover portion 13b, dust and water are discharged from these through-holes 21a and the like. Infiltration can be suppressed. In particular, the through-holes 21c and the like that are left as they are without being inserted with screws or the like are likely to infiltrate moisture or the like, but this can be effectively suppressed. These actions are the same for the through hole 22a for attaching the terminal block 17 for connecting the dimming signal line.

  Moreover, since the cover member 13 covers the power supply circuit 11 and covers the through hole 21a as a terminal block mounting means, the power supply circuit 11 and the cover member 13 are attached to the case body 12 at the same time. Both terminal block mounting means can be covered, and the simplification of the configuration and assembly work can be achieved.

  As described above, according to the present embodiment, dust and water are prevented from entering the power terminal block 14 and the terminal block 17 for connecting the dimming signal line, thereby providing the power unit 10 and the lighting device with high safety. can do. Moreover, since the cover member 13 covers the power supply circuit 11 and also covers the through hole 21a and the like as terminal block mounting means, the configuration and assembly work can be simplified. In addition, different types of power supply terminal blocks can be attached, and the components of the power supply unit 10 can be shared.

  In addition, this invention is not limited to the structure of the said embodiment. For example, in a power supply unit that does not connect a dimming signal line, it is not necessary to provide a terminal block for dimming signal line connection. Moreover, the terminal block attachment means penetrated up and down is not limited to the through hole but may be a notch or the like, and the form is not particularly limited. Furthermore, the different types of power terminal blocks are not limited to domestic and overseas use. It may be used in Japan, and a power terminal block having a different form may be applicable.

  Furthermore, in order to be able to apply different types of power supply terminal blocks, the present invention is not limited to the one in which a plurality of terminal block attachment means are formed. For example, in order to apply a single type of power terminal block, one terminal block mounting means may be formed, and the power terminal block may be attached via the terminal block mounting means. Also in this case, one terminal block attaching means is covered by the cover member together with the power circuit, so that safety can be ensured, and the configuration and assembling work can be simplified. Further, by applying a sealing material or the like to the connection terminal portion for inserting the power line of the power terminal block or the terminal block mounting means, it is possible to further suppress the intrusion of dust and water.

  In addition, as the light source, an LED, an incandescent bulb, a fluorescent lamp, a high-intensity discharge lamp, or the like can be applied. Furthermore, as a lighting fixture, it is applicable to an emergency light etc. besides a downlight.

  Next, a lighting device according to a second embodiment of the present invention will be described with reference to FIG. FIG. 10 is a front view showing a state in which the lighting device is attached to the ceiling surface. In addition, the same code | symbol is attached | subjected to the part which is the same as that of 1st Embodiment, or an equivalent, and the overlapping description is abbreviate | omitted.

  In the present embodiment, an installation base 30 is provided on the support leg 12 c of the case body 12 of the power supply unit 10. The pedestal 30 has a substantially rectangular shape, and the support legs 12c are attached by screws or the like. The pedestal 30 is appropriately fixed to the ceiling C surface by a fixing means such as a screw. Note that the pedestal 30 is not necessarily fixed to the ceiling C surface.

  When installing the power supply unit 10, the power supply unit 10 is inserted through the embedding hole H and disposed behind the ceiling C. If the pedestal 30 as described above is not provided, the power supply unit 10 is embedded. For example, the cover member 13 may be placed on the ceiling C surface, and the top and bottom may be placed in the opposite posture and installed as they are. In such a case, since the power terminal block 14 is not covered at all, there is a possibility that dust and water may enter.

  However, in this embodiment, since the pedestal 30 is provided, it is possible to prevent the pedestal 30 from being placed in an inappropriate posture, and to be stably installed in an appropriate posture, further improving safety. Can do.

  Next, an illumination device according to a third embodiment of the present invention will be described with reference to FIG. Fig.11 (a) is a front view which shows the state which attached the illuminating device to the ceiling surface, FIG.11 (b) is explanatory drawing which shows an electric wire fixing means. In addition, the same code | symbol is attached | subjected to the part which is the same as that of 2nd Embodiment, or an equivalent part, and the overlapping description is abbreviate | omitted.

  In the present embodiment, electric wire fixing means 32 that clamps and fixes electric wires is provided before and after the base 30 in the second embodiment. As shown in FIG. 11 (b), the electric wire fixing means 32 is formed with an electric wire holding portion 32a. By pressing the electric wire into the electric wire holding portion 32a from above, both sides of the electric wire holding portion 32a are illustrated. It is elastically deformed in the direction, and the electric wire is clamped and fixed by this elastic return.

  A power supply line PW and a lead wire 16 are fixed to the electric wire fixing means 32. Therefore, even when inadvertent tension is applied to the power supply line PW and the lead wire 16, it is possible to prevent the power supply line PW from being disconnected from the power supply terminal block 14 and the lead wire 16 from being disconnected from the power supply unit 10. it can.

  Further, the downlight body 1 uses an LED 4 as a light source, and the LED 4 affects the lifetime as well as a decrease in light output and a change in characteristics as its temperature rises. For this reason, it is necessary to suppress a temperature rise in order to improve various characteristics of the life and efficiency of the LED 4. Therefore, it is necessary to arrange the power supply unit 10 and the downlight main body 1 so that they are not too close to each other so that the heat generated from the power supply unit 10 does not affect the LED 4, that is, the downlight main body 1.

In this embodiment, since the electric wire fixing means 32 is provided, it can prevent that the power supply unit 10 and the downlight main body 1 mutually adjoin, and the heat | fever which generate | occur | produces from the power supply unit 10 to LED4 can be prevented. Can reduce the effect.

  Furthermore, since the electric wire fixing means 32 is formed in a wall surface shape, it blocks the heat generated from the power supply unit 10 and functions as a protective wall, and this also causes the heat to act on the LED 4. It is reduced. In addition, the wall-like form of the electric wire fixing means 32 can be variously selected according to the design.

  Next, a lighting device according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 12 is a front view showing a state in which the lighting device is attached to the ceiling surface. In addition, the same code | symbol is attached | subjected to the part which is the same as that of 2nd Embodiment, or an equivalent part, and the overlapping description is abbreviate | omitted.

  In the present embodiment, in the lead wire 16A that connects the downlight main body 1 and the power supply unit 10, the power supply connection wire is covered with a metal hard protective pipe 16p. The protective pipe 16p is connected in contact with the aluminum die-cast cylindrical main body 2 in the downlight main body 1 and the sheet metal case main body 12 or the cover member 13 in the power supply unit 10.

  Therefore, the downlight main body 1 can be grounded by the protection pipe 16p, and can be grounded without providing a ground connection line in the lead wire 16A. Further, since the protective pipe 16p is hard, the downlight main body 1 and the power supply unit 10 can always be arranged at regular intervals during installation. Thereby, in the power supply unit 10, the influence of the heat which generate | occur | produces from the downlight main body 1 can be reduced, and generation | occurrence | production of the life shortening of the electrical component of the power supply unit 10, a characteristic fluctuation | variation, a failure, etc. can be reduced. .

  Conversely, since the downlight main body 1 and the power supply unit 10 are always arranged at a constant interval, the heat generated from the power supply unit 10 is generated in the downlight main body 1 as in the third embodiment. The action on the LED 4 can be reduced, and various characteristics of the life and efficiency of the LED 4 can be improved. The protective pipe 16p is not limited to metal, and can be formed of a conductive material.

  The present invention is not limited to the configuration of each of the embodiments described above, and various modifications can be made without departing from the spirit of the invention. For example, the power supply unit is applicable not only to the lighting device but also to other electric devices.

DESCRIPTION OF SYMBOLS 1 ... Lighting fixture main body (downlight main body), 4 ... Light source (LED),
10 ... Power supply unit, 11 ... Power supply circuit, 12 ... Case body,
12b: Terminal block mounting portion, 13: Cover member, 14 ... Power supply terminal block,
21a, 21b, etc .... Terminal block attachment means (through hole), 30 ... Installation base

Claims (4)

With the case body;
A terminal block mounting portion extending in the case body and formed with terminal block mounting means penetrating vertically;
A power circuit attached to the case body;
A power supply terminal block mounted on the lower surface side of the terminal block mounting portion via the terminal block mounting means;
A cover member attached to the case body so as to cover the power supply circuit and the terminal block mounting means;
A power supply unit comprising:   2. The power supply unit according to claim 1, wherein a plurality of the terminal block attachment means are formed so that a plurality of types of power supply terminal blocks can be attached.   The power supply unit according to claim 1, wherein a pedestal for installation is provided in the case main body. A luminaire body having a light source;
The light source unit according to any one of claims 1 to 3 connected to the lighting fixture body;
An illumination device comprising:

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