JP2012079847A - Electrical device and lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrical device formed in thin type, and a lighting system including the electrical device.SOLUTION: An electrical device 1 includes: a center hole 5 to which a central leg 4a of an E-shaped core 4 is inserted; a multilayer substrate 2 having conductive patterns formed in respective layers so as to surround the periphery of the center hole, and first electrical connection means 6 that connects the conductive patterns on the respective layers in series; an aperture to which the multilayer substrate 2 is fit and attached; a pair of side holes 8, 8 to which legs on both sides 4b, 4b of the E-shaped core 4 are inserted; a single-layer substrate 3 having second electrical connection means 9 that is electrically connected to conductive patterns on a lower-most layer and an upper-most layer of the multilayer substrate 2 that is fit and attached to the aperture; and the E-shaped core 4 that is inserted respectively into the center hole 5 and the pair of side holes 8, 8, and attached to the multilayer substrate 2 and the single-layer substrate 3.

Description

  Embodiments described herein relate generally to an electric device having a multilayer substrate and a single layer substrate, and an illumination device including the electric device.

  Some electric devices convert a commercial AC voltage into a DC voltage, and further convert the AC voltage into a predetermined DC voltage or a predetermined AC voltage to control the load. An inductor is used in the electric circuit of this electric device (see, for example, Patent Document 1). This inductor is mounted on a circuit board together with other circuit components.

Japanese Patent Publication No. 7-1697 (page 3, Fig. 1)

  Since the inductor has a relatively high dimension and is difficult to be disposed along the circuit board, the space occupied by the circuit board is increased. For this reason, it has been difficult to reduce the thickness of the electric device.

  An object of the present invention is to provide an electric device that can be formed into a thin shape and an illumination device including the electric device.

  The electric device according to the present embodiment includes a multilayer substrate, a single layer substrate, and an E-shaped core.

  The multilayer substrate of the present embodiment includes a central hole into which the central leg of the E-shaped core is inserted, a conductive pattern formed in each layer so as to circulate around the central hole, and a first that connects the conductive patterns of each layer in series. It has the electrical connection means.

  The single-layer substrate of the present embodiment includes an opening in which the multilayer substrate is fitted, a pair of side holes into which both side legs of the E-shaped core are inserted, and the lowermost and uppermost conductive patterns of the multilayer substrate fitted in the opening. And second electrical connection means for electrical connection to.

  The E-shaped core of this embodiment is inserted into a central hole formed in the multilayer substrate and a pair of side holes formed in the single layer substrate, and is attached to the multilayer substrate and the single layer substrate.

  According to the present embodiment, the conductive pattern formed on each layer of the multilayer substrate becomes a coil wound around the center leg of the E-shaped core, and the inductor component is formed on the multilayer substrate and the single layer substrate. Further, only the E-shaped core portion protrudes from the single-layer substrate, and the space occupied by both the substrates can be reduced, so that the electric device can be expected to be thin.

It is a partial schematic perspective view of the electric apparatus which shows Example 1 of this invention. Similarly, it is a partial schematic exploded perspective view of an electric device. Similarly, it is a schematic exploded perspective view of a substrate. It is a schematic front sectional drawing of the illuminating device which shows Example 2 of this invention. Similarly, it is a schematic side view of an illuminating device.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  An electrical apparatus 1 showing Embodiment 1 of the present invention is configured as shown in FIGS. In FIG. 1, an electric device 1 is formed having a multilayer substrate 2, a single layer substrate 3, and an E-shaped core 4.

  In FIG. 3, the multilayer substrate 2 has four or more layers and is made of, for example, a glass epoxy material having a thickness of 2 to 5 mm, and is formed in a rectangular shape. A central hole 5 is formed at the center of the rectangle. The center hole 5 is formed in a shape and size into which the center leg 4a of the E-shaped core 4 can be inserted.

  In each layer, a conductive pattern (not shown) that circulates around the central hole 5 is formed in a spiral shape, for example. A plurality of end face patterns 6 as first electrical connection means straddling the end face 2c are formed on the upper surface 2a and the lower surface 2b on the end side. The end face pattern 6 connects the conductive patterns in series. In addition, what is necessary is just to set the upper limit of four layers or more suitably.

  The single layer substrate 3 is a rigid substrate having a thickness equivalent to that of the multilayer substrate 2 and is formed in a long rectangular shape. An opening 7 into which the multilayer substrate 2 is fitted and a pair of side holes 8 and 8 into which both side legs 4b and 4b of the E-shaped core 4 are inserted are formed. The opening 7 is formed in a rectangle that is slightly larger than the rectangle of the multilayer substrate 2. The pair of side holes 8 and 8 are formed in a shape and size into which both side legs 4b and 4b of the E-shaped core 4 can be inserted. In FIG. 3, the opening 7 and the pair of side holes 8 and 8 communicate with each other, but are individually formed depending on the size of the E-shaped core 4 and the multilayer substrate 2.

  The single-layer substrate 3 is formed with a plurality of terminals 9 as second electrical connection means that are electrically connected to the lowermost layer and the uppermost conductive pattern of the multilayer substrate 2. The terminal 9 is made of, for example, copper foil. The terminal 9 is provided corresponding to the end face pattern 6 of the multilayer substrate 2.

  Then, as shown in FIG. 2, the multilayer substrate 2 is fitted into the opening 7 and attached. The multilayer substrate 2 is fixed to the single-layer substrate 3 with an insulating adhesive (not shown) applied to an appropriate portion of the edge of the multilayer substrate 2. Moreover, the end face pattern 6 of the multilayer substrate 2 and the terminal 9 of the single layer substrate 3 are close to each other, and both are electrically connected by applying solder.

  The E-shaped core 4 is made of ferrite and has a pair having a central leg 4a and a pair of side legs 4b and 4b. A pair of E-shaped cores 4 and 4 are inserted into the central hole 5 of the multilayer substrate and the pair of side holes 8 and 8 of the single-layer substrate 3 from both sides of the respective substrates 2 and 3. The pair of E-shaped cores 4 and 4 are fixedly attached to the multilayer substrate 2 and the single-layer substrate 3 with an adhesive (not shown).

  Then, as shown in FIG. 1, electronic components 9a, 9b, and 9c are mounted on portions of the multilayer substrate 2 and the single-layer substrate 3 excluding the E-shaped core 4. The electronic components 9a, 9b and 9c are electrically connected to the end face pattern 6 of the multilayer substrate 2 and the terminals 9 of the single layer substrate 3 by a wiring pattern 9d made of copper foil.

  According to the present embodiment, the conductive pattern formed in each layer of the multilayer substrate 2 becomes a coil wound around the central legs 4a and 4a of the E-shaped cores 4 and 4, and the inductors are formed on the multilayer substrate 2 and the single-layer substrate 3. Since the components are formed, only the E-shaped cores 4 and 4 project from the multilayer substrate 2 and the single-layer substrate 3, and the space occupied by both the substrates 2 and 3 is reduced, so that the electric device 1 is made thin. It has the effect that it can be done.

  In place of the pair of E-shaped cores 4 and 4, E-shaped and I-shaped cores may be used.

  4 and 5 show a second embodiment of the present invention, FIG. 4 is a schematic front sectional view of the lighting device, and FIG. 5 is a schematic side view of the lighting device. The same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted.

  A lighting device 10 shown in FIG. 4 is a direct-mounted lighting fixture that is directly attached to a ceiling surface or the like, and is formed in a fixture main body 11 and a light source unit 12 attached to the fixture main body 11. The instrument body 11 and the light source unit 12 are each formed in a rectangular box shape. The instrument body 11 has a length in the longitudinal direction substantially the same as that of the light source unit 12, but its width in the short direction is smaller than that of the light source unit 12, as shown in FIG. Yes. The light source unit 12 is attached to the instrument body 10 by a plurality of screws 13 at one end side 11 a of the instrument body 11 and at both end sides 12 a and 12 b in the longitudinal direction of the light source unit 12.

  In FIG. 4, the light source unit 12 has a large number of light emitting diodes 14 as illumination loads arranged in a lattice pattern. The light emitting diode 14 is formed to emit visible light. The light source unit 12 is provided with a translucent cover 15 on the opening side 12c. Visible light emitted from the light emitting diode 12 passes through the translucent cover 15 and is emitted to the floor surface side. That is, the light emitting diode 12 is disposed on the floor surface side so as to be able to emit visible light.

  The appliance main body 10 accommodates the electric device 1 shown in FIG. The electric device 1 is formed as a lighting device that lights the light emitting diode 14.

  The lighting apparatus 10 of the present embodiment has an effect that the entire apparatus can be thinned since the electric apparatus 1 to be thinned is accommodated in the apparatus main body 10.

  In addition, the illuminating device of this embodiment is not limited to a direct-mounted illuminator, and may be configured as a suspended illuminator or an embedded illuminator.

  DESCRIPTION OF SYMBOLS 1 ... Electrical apparatus, 2 ... Multi-layer board | substrate, 3 ... Single layer board | substrate, 4 ... E-shaped core, 5 ... Center hole, 6 ... End face pattern as 1st electrical connection means, 7 ... Opening, 8, 8 ... Pair Side hole, 9 ... Terminal as second connecting means, 10 ... Illuminating device, 11 ... Appliance body, 14 ... Light emitting diode as illumination load

Claims (2)

A multilayer board having a central hole into which a central leg of an E-shaped core is inserted, a conductive pattern formed in each layer so as to circulate around the central hole, and a first electrical connection means for connecting the conductive pattern of each layer in series When;
A second electrical connection electrically connected to the opening in which the multilayer board is fitted, a pair of side holes into which both side legs of the E-shaped core are inserted, and the lowermost and uppermost conductive patterns of the multilayer board fitted in the opening. A single layer substrate having electrical connection means of:
An E-shaped core inserted into the central hole formed in the multilayer substrate and the pair of side holes formed in the single-layer substrate, and attached to the multilayer substrate and the single-layer substrate;
An electrical device comprising: A lighting load that emits visible light;
The electrical device of claim 1 configured to turn on the lighting load;
An instrument body in which the illumination load is disposed so that visible light can be emitted on one end side, and the electric device is accommodated therein;
An illumination device comprising:

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