JP2010277924A - Electric equipment and lighting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric equipment achieving both downsizing and heat radiation. <P>SOLUTION: The electric equipment is equipped with: a circuit board 26 on which an electronic component for supplying power supply is mounted; a long base case 22 to house the circuit board; and a cover case 25 which covers the upper part of the base case 22 so as to envelope the electronic component of the circuit board 26, and has an end plate part 25e which is provided at both end part in longitudinal direction and has an projected portion 25ea formed on the lower end side to press the circuit board 26 on the base case 22 side, and a coupling means which is provided on the lower side and couples to an installation body side for heat radiation. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electrical device such as a lighting device for lighting a lighting fixture that uses a light emitting element such as an LED as a light source, and a lighting fixture configured using the electrical device.

  Conventionally, in this type of electrical equipment, an LED mounting board on which an LED is mounted, a heat dissipating means provided on the LED mounting board, a DC power supply circuit that receives a commercial power supply and outputs a predetermined DC voltage, and the LED mounting board What is provided with the cover which accommodates a thermal radiation means and a DC power supply circuit is known.

  In the above electrical equipment, the heat of the heat dissipation means is configured to be transmitted to the cover via the heat transfer means so that the heat of the LED element is efficiently radiated and the influence of the heat on the DC power supply circuit is mitigated. (See Patent Document 1).

  In the above electric device, the heat of the LED element is dissipated, and heat dissipation by the circuit of the electric device is not considered. In recent years, there has been a demand for miniaturization of electrical equipment, and there is a demand for electrical equipment that considers both miniaturization and heat dissipation by the circuit of the electrical equipment.

  The present invention has been made in view of a demand for an electric device such as a lighting device for lighting a lighting fixture using a light emitting element as a light source as described above, and an object thereof is to achieve both miniaturization and heat dissipation. It is to provide an electric device that can be used.

  An electrical apparatus according to the present invention includes a circuit board on which electronic components for supplying power are mounted; a long base case for housing the circuit board; and an upper part of the base case so as to enclose the electronic parts on the circuit board. Coupling means for coupling to the end plate part which is provided at both ends in the longitudinal direction and has a convex part formed on the lower end side to hold the circuit board to the base case side and to the attached body side which is provided on the lower side and can dissipate heat And a cover case provided with.

  The convex part that holds down the circuit board means that the convex part is convex toward the circuit board side, and is not limited to a single convex part, and can be constituted by a plurality of convex parts.

  The electrical device according to the present invention is characterized in that the heat generating component in the electronic component mounted on the circuit board is thermally coupled to the cover case.

  Here, “thermally coupled to the cover case” may be indirect or direct. Therefore, the heat generating component includes a configuration that obtains thermal coupling with the cover case via the heat dissipation sheet. The heat generating component in the electronic component may include a transformer, but is not limited thereto.

  The electric device according to the present invention is characterized in that a terminal block is mounted on the end portion in the longitudinal direction of the circuit board, and a notch portion is formed in the end plate portion of the cover case at a portion corresponding to the terminal block.

  The position of the notch can be changed according to the number and position of the terminal blocks.

  The lighting apparatus according to the present invention includes the electric device according to any one of claims 1 to 3, wherein the electronic component of the circuit board constitutes a circuit for lighting the light emitting element, and functions as a lighting device; A light source configured by a light-emitting element that is turned on by the device; and an instrument body that is coupled to the coupling unit of the electrical device and has the light source disposed thereon.

  The light emitting element is, for example, an LED.

  Since the electric device according to the present invention has a configuration in which the circuit board is pressed toward the base case by the convex portion provided on the end plate portion of the cover case, the number of components can be reduced, contributing to downsizing. Further, heat can be radiated to the attached body side where heat can be radiated by the coupling means, and appropriate heat radiation can be achieved.

  In the electric device according to the present invention, the electronic component mounted on the circuit board is thermally coupled to the cover case and transmitted to the fixture body of the lighting fixture, so that the electric device is efficiently radiated.

  In the electrical device according to the present invention, the end plate portion of the cover case has a notch formed in a portion corresponding to the terminal block, so that an appropriate insulation distance can be taken from the terminal of the terminal block. It is possible to comply with public safety standards.

  According to the lighting fixture which concerns on this invention, the lighting fixture which has size reduction and a favorable heat dissipation effect can be provided.

The assembly perspective view of the electric equipment concerning a first embodiment of the present invention. The assembly perspective view regarding the principal part of the electric equipment which concerns on 1st embodiment of this invention. The assembly perspective view which shows embodiment of the electric equipment used for the lighting fixture which concerns on this invention. The side view which shows embodiment of the electric equipment used for the lighting fixture which concerns on this invention. The side view which shows other embodiment of the electric equipment used for the lighting fixture which concerns on this invention. Sectional drawing which shows embodiment of the electric equipment used for the lighting fixture which concerns on this invention. The assembly perspective view of the lighting fixture which concerns on 2nd embodiment of this invention. AA sectional drawing of FIG. The assembly perspective view which applied the electric equipment to the lighting fixture which concerns on 2nd embodiment of this invention.

  Embodiments of an electrical apparatus and a lighting apparatus according to the present invention will be described below with reference to the accompanying drawings. In each figure, the same components are denoted by the same reference numerals, and redundant description is omitted. FIG. 1 shows an embodiment of a line-type lighting fixture configured using the electrical apparatus according to the first embodiment. The lighting fixture 10 includes a lighting device 20 that is an electrical device on the bottom side of a long and box-like fixture body 11.

  At both ends in the longitudinal direction on the bottom surface of the instrument body 11, U-shaped frame bases 12 are provided, and for example, an aluminum frame 40 is fixed to the frame base 12. A configuration related to the frame 40 is shown in FIG. The frame 40 includes a bottom plate 41 having an area substantially coinciding with the bottom surface of the instrument main body 11, and a side plate 42 provided so as to stand upright at two long sides of the bottom plate 41. On the front surface side of the bottom plate 41, a plurality of substrates 44 on which a plurality of LEDs 43 as light sources are mounted in a row are arranged in the longitudinal direction and fixed by screws 45.

  Fixing holes 41 a are formed at both ends of the bottom plate 41 in the longitudinal direction. The bottom plate 41 of the frame 40 is provided with a hole (not shown) through which a lead for supplying power to the LED 43 mounted on the substrate 44 passes. The lead is inserted into a terminal hole of a terminal block 13b described later and receives power supply.

  In the frame 40, a groove 46 is formed in the longitudinal direction in the vicinity of the front ends of the side plates 42, 42. For example, a side edge portion 47 a of a translucent cover 47 that is flare-proof is inserted into the groove 46. The two short sides 47 b of the long cover 47 are inserted into a support piece 48 having a groove 48 a corresponding to the two short sides 47 b, and are screwed to the frame base 12 by screws 49.

  The lighting device 20 shown in FIG. 3 is fixed to the back surface side of the bottom plate 41 in the frame 40. The lighting device 20 includes a base case 22, an insulating sheet 23, a lighting circuit 24, and a cover case 25 as main components. The insulating sheet 23 is disposed along the inside of the base case 22 and has an R shape corresponding to a semicircular arc along the inside of the cover case 25 when the cover case 25 is covered with the base case 22. It arrange | positions so that it may return to the base case 22 side, and the electrical connection with the metal base case 22, the cover case 25, and the lighting circuit 24 is interrupted | blocked. The lighting circuit 24 has a configuration in which the electronic component 21 is mounted on the circuit board 26. The cover case 25 has a function of a lid that covers the base case 22. The lighting circuit 24 is housed in a state of being covered with an insulating sheet 23 in a housing constituted by the cover case 25 and the base case 22.

  The base case 22 is configured to have a pair of side wall portions 22b and 22b on both sides of the bottom surface portion 22a by bending, for example, a single metal flat plate. As the metal, for example, a steel plate material is used. The bottom surface portion 22a is formed in an elongated rectangular shape. The pair of side wall portions 22b and 22b are bent upward from both sides so as to extend along the longitudinal direction of the bottom surface portion 22a, and the base case 22 is entirely formed in a substantially bowl shape so as to be substantially orthogonal to the bottom surface portion 22a and facing each other. Has been.

  In the pair of side wall portions 22b and 22b, holes 8 as engagement receiving portions are respectively formed on one end side and the other end side in the longitudinal direction as shown in FIG. The hole 8 is formed in a rectangular shape and is sized to engage with a convex portion (convex toward the base case 22) 10 that is an engaging portion of the cover case 25.

  Further, in the bottom surface portion 22a, a substrate support step portion 22ba having an L-shaped cutout portion that protrudes inward and places the circuit board 26 at the tip is formed on one end side and the other end side in the longitudinal direction. Has been. A total of four board support steps 22ba support the circuit board 26.

  The insulating sheet 23 is made of an insulating resin having a flat shape, such as polyethylene terephthalate (PET), and is arranged inside along the inner surfaces of the base case 22 and the cover case 25. The thickness of the insulating sheet 23 is, for example, 0.2 to 1.0 mm.

  The lighting circuit 24 is configured by mounting electronic components on a circuit board 26. The circuit board 26 is made of, for example, a glass epoxy material or a paper phenol material, and is formed in a rectangular shape. The longitudinal dimension of the circuit board 26 is somewhat larger than the longitudinal dimension of the side wall portion 22b of the base case 22. Designed small.

  Furthermore, on the upper surface 26a of the circuit board 26, an input terminal block 13a is disposed on one end side 26b, and an output terminal block 13b is disposed on the other end side. A power supply line from a commercial AC power supply is connected to the input terminal block 13a, and a lead wire connected to the LED 43 is led out from the output terminal block 13b.

  The electronic component 21 is mounted between the input terminal block 13a and the output terminal block 13b of the circuit board 26, and an AC voltage is applied by a capacitor C1, an inductor L1, and a transistor TR and a transformer T (not shown). A DC power supply circuit that converts the DC voltage into a DC voltage, an inverter circuit that converts the DC voltage into a high-frequency AC voltage, and a circuit that applies a driving voltage to the LED 43 are formed.

  The cover case 25 is made of, for example, a steel plate material, and includes a pair of side plate portions 25c and 25c and a top plate portion 25a that connects the pair of side plate portions 25c and 25c. More specifically, the cover case 25 is configured by bending a single flat plate. The cover case 25 is connected to the rectangular top plate portion 25a and both ends along the longitudinal direction of the top plate portion 25a and the top plate portion. A pair of inclined plate portions 25b and 25b that are inclined inward with respect to 25a are provided. The pair of inclined plate portions 25b, 25b are provided with a pair of side plate portions 25c, 25c facing each other substantially parallel to each other along the longitudinal direction thereof. Further, the side plate portions 25c, 25c extend horizontally. Flange portions 25d and 25d are formed. The lighting device 20 is attached to the frame 40 with a screw through a hole formed in the flange portion 25d. In this way, the flange portion 25d functions as a coupling means for coupling with the fixture body 11 of the lighting fixture as a mounted body capable of radiating heat.

  As shown in FIG. 4, at both ends in the longitudinal direction of the top plate portion 25a, a pair of end plate portions 25e and 25e formed so as to be substantially orthogonal to the top plate portion 25a are connected to the top plate portion 25a. Has been established. The end plate portions 25e and 25e have a substantially pentagonal planar shape and substantially close the upper side of the opening 14 at both ends in the longitudinal direction of the cover case 25. Both end portions of the lower end portions of the end plate portions 25e and 25e have convex portions 25ea for pressing the circuit board. When the cover case 25 is mounted on the base case 22 from above, the end plate portions 25e and 25e enclose the electronic component 21 with the terminal blocks 13a and 13b left outside, and the circuit board 26 is formed by the convex portions 25ea. It will be in the state to hold down. At the lower end portions of the end plate portions 25e, 25e, a notch portion 25eb is formed between the two convex portions 25ea, 25ea. An appropriate insulation distance is provided between the end plate portions 25e and 25e and the terminal blocks 13a and 13b by the notches 25eb. The side plate portions 25c and 25c are connected to both sides along the longitudinal direction of the top plate portion 25a via the inclined plate portions 25b and 25b.

  Depending on the position and number of the terminal blocks 13a and 13b, the position and number of the convex portions 25ea and the cutout portions 25eb are changed. For example, as shown in FIG. 5, at the center of the end plate portions 25e and 25e. One convex portion 25ea for pressing the circuit board may be provided. In this case, two notches 25eb are formed at both ends of one convex portion 25ea. By this cutout portion 25eb, an appropriate insulation distance is provided between the end plate portions 25e, 25e and the terminal blocks 13a, 13b.

  Further, the cover case 25 is formed in such a size that its longitudinal direction is located between the input terminal block 13a and the output terminal block 13b disposed on the circuit board 26. Further, when the cover case 25 is fitted to the base case 22, the height dimensions of the side plate portions 25c and 25c (the cover case 25 so that the bottom surface of the flange portion 25d and the bottom surface portion 2a of the base case 22 coincide with each other). Height dimension) is set. Further, the distance between the side plate portions 25c and 25c is set so that the inner surfaces of the pair of side plate portions 25c and 25c overlap the outer surfaces of the pair of side wall portions 22b and 22b of the base case 22 and are thermally coupled to each other. . When the cover case 25 has elasticity as a whole and is deformed so as to expand with respect to the pair of side plate portions 25c and 25c, a force that elastically returns to the original shape is applied.

  When connecting the cover case 25 to the base case 22, the pair of side wall portions 22 b and 22 b of the base case 22 are sandwiched between the side plate portions 25 c and 25 c of the cover case 25. Thereby, the inner surfaces of the side plate portions 25c, 25c of the cover case 25 and the outer surfaces of the pair of side wall portions 22b, 22b of the base case 22 come into contact with each other and overlap each other. And if the cover case 25 is pressed and moved to the bottom face part 22a side of the base case 22, the convex part 9 of the cover case 25 will ride on the outer surface of the side wall parts 22b and 22b.

  When the pair of side plate portions 25 c and 25 c overlap the pair of side wall portions 22 b and 22 b of the base case 22, the convex portion 9 is fitted into the hole 8 provided in the side wall portions 22 b and 22 b. At this time, the projecting surfaces of the projections 9 abut against both lateral edges of the hole 8. Thereby, the convex portion 9 is firmly fixed to the hole 8 and does not move in the hole 8.

  As already described, in addition to the input terminal block 13a, the capacitor C1, and the inductor L1, the transformer T, the power transistor TR, the output terminal block 13b, and other electronic components 21 are mounted on the circuit board 26. Here, since the component having a high height is the transformer T, as shown in FIG. 6 which is a cross-sectional view taken along a plane parallel to the end plate portion 25e of the cover case 25 including the transformer T, the insulating sheet 23 and the heat conduction The core TC of the transformer T and the cover case 25 are brought into contact with each other through a heat-dissipating sheet H made of a silicone resin that is flexible and elastic. With this configuration, the heat generated by the transformer T is transferred to the cover case 25 via the insulating sheet 23, so that heat is appropriately radiated. Since the lighting device 20 including the cover case 25 is connected to the fixture body 11, the heat of the lighting device 20 can be dissipated from the fixture body 11.

  Here, since the two transformers T are mounted, if the heights of the mounted transformers T and T do not match, the insulating sheet 23 and the heat dissipation are disposed between the core TC of the transformer T and the cover case 25. The gap between the transformer T-core CT and the cover case 25 is absorbed by interposing the sheet H, and the connection between the transformer T and the cover case 25 is reliably ensured.

  The lighting fixture according to the second embodiment includes a light emitting panel 50, a main body frame 60, and a support frame 70 as shown in FIG. The main body frame 60 and the support frame 70 constitute a lighting fixture main body. The light-emitting panel 50 has a square shape in plan view, and 4 × 4 LEDs 52 are mounted on four substrates, respectively. These LEDs are arranged as a whole, and the LEDs 52 are arranged in a matrix on the substrate 51 as shown in FIG. It is comprised as follows. Each LED 52 is disposed at the lowermost part of an inclined surface constituted by four reflecting plates 53 having heat resistance and insulation. Light emitted from each LED 52 is emitted toward an illumination target from an opening 55 formed by four reflecting plates 53. A heat radiating plate 54 is provided on the back side of the substrate 51 to radiate the LEDs 52. Leads for supplying power to the respective LEDs 52 are attached to the substrate 51. The leads are drawn out to the back side through the heat sink 54, and a terminal connected to the terminal block 13b is provided at the tip.

  The main body frame 60 is configured in a frame shape by four side plates 61 made of a material having good thermal conductivity, and the side plates 61 have flange portions 62a protruding outward at both end edges in the width (height) direction. 62b. Further, flanges 62 c that protrude toward the inside of the main body frame 60 are formed on the side plates 61 on the same surface as the flange portions 62 b that protrude outward. The light emitting panel 50 is reversed and reversed from the state of FIG. 7, and is held and fixed at the flange portion 62c. A locking piece portion 63 that protrudes like a bowl is formed along one side of the side portion of the flange portion 62b provided on one side plate 61. The side plate 61 on the side facing the side plate 61 on the side where the locking piece 63 is formed is provided with a stopper (not shown).

  The support frame 70 is a frame made of a material having good thermal conductivity for housing the main body frame 60, and is configured in a frame shape by four side plates 71. The side plate 71 has flange portions 72a and 72b protruding outward at both end edges in the width (height) direction. Further, flanges 72 c that protrude toward the inside of the support frame 70 are formed on the side plates 61 on the same surface as the flange portions 72 b that protrude outward. The flange portion 72c is formed with a groove-like locking receiving portion 73 that receives and engages with the locking piece portion 63.

  A locking piece (not shown) provided on the side plate 61 on the side facing the side plate 61 on the side where the locking piece portion 63 of the main body frame 60 is fitted to the locking receiving portion 73 and the locking piece portion 63 is formed. Thus, the corresponding side plate 71 of the support frame 70 is pressed. As a result, the main body frame 60 is housed and fixed in the support frame 70.

  The main body frame 60 to which the light emitting panel 50 is fixed is housed in the support frame 70, and the lighting device 20 is attached to the heat sink 54 as shown in FIG. At this time, the lead pulled out to the back side through the heat sink 54 is connected to the terminal block 13b. As a result, the lighting device 20 is thermally coupled to the appliance body at least at the flange portion 62a and the flange portion 72a, and can appropriately dissipate heat generated in the lighting device 20. As for the transformer mounted in the lighting device 20, the core TC of the transformer T and the cover case 25 are brought into contact with each other through the insulating sheet 23 as shown in FIG. 6. With such a configuration, the heat of the lighting device 20 can be dissipated from the appliance main body constituted by the main body frame 60 and the support frame 70.

DESCRIPTION OF SYMBOLS 10 Lighting fixture 11 Appliance main body 20 Lighting device 22 Base case 24 Lighting circuit 25 Cover case 25e End plate part 25ea Convex part 25eb Notch part 26 Circuit board 40 Frame 43 LED
50 Light Emitting Panel 60 Body Frame 70 Support Frame

JP 2008-252141 A

Claims (4)

A circuit board on which electronic components for supplying power are mounted;
A long base case for storing the circuit board;
Covers the upper part of the base case so as to enclose the electronic components of the circuit board, and is provided on the end plate part on the lower side and provided on the lower side and on the lower side where the convex part is formed to hold the circuit board to the base case side. And a cover case provided with a coupling means for coupling to a mounted body side that can dissipate heat. The electric device according to claim 1, wherein the electronic component mounted on the circuit board is thermally coupled to the cover case. The electrical terminal according to claim 1 or 2, wherein a terminal block is mounted on a longitudinal end portion of the circuit board, and a notch portion is formed in a portion corresponding to the terminal block on the end plate portion of the cover case. machine. The electric device according to any one of claims 1 to 3, wherein the electronic component of the circuit board constitutes a lighting circuit for the light emitting element and functions as a lighting device;
A light source composed of a light emitting element that is turned on by the electrical device;
A lighting fixture comprising: a fixture main body which is coupled with a coupling means of the electric device and has a light source disposed thereon.

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