JP2010170841A - Electric appliance and luminaire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric appliance constituted to easily radiate heat neither using various kinds of insulating sheets nor needing to prepare various sizes and shapes according to the size and shape of a heat generating component. <P>SOLUTION: A first insulating sheet 3 is disposed on the inner surface of a base case 2, and a circuit board 6 mounted with an electric component is disposed on the bottom face side of the base case 2 through the first insulating sheet 3. A second insulating sheet is disposed on the inner surface of a cover case so as to be along the inner side face of the cover case, and insulating heat-radiating resin 60 is applied to at least either between the base case 2 and the first insulating sheet 3 or between the cover case and the second insulating sheet. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electric device that is configured in a box shape by a base case and a cover case that is a lid of the base case, and includes an insulating sheet for insulating an internal circuit.

  In the conventional lighting device for lighting, as shown in FIG. 5A, a plate-like fixed shape is formed on the head portion 91t and the bottom portion 91b of the heat generating component 91 mounted on one surface of the circuit board 90. Heat was dissipated by interposing a silicone sheet 93 having The silicone sheet 93 provided on the head 91 t of the heat generating component 91 is interposed between the insulating sheet 95 provided inside the cover case 94 and the head 91 t of the heat generating component 91.

  Alternatively, as shown in FIG. 5B, the heat generating component 96 mounted on the back surface of the circuit board 90 is interposed between the insulating sheet 98 provided inside the base case 97 and the head 96 t of the heat generating component 96. A silicone sheet 93 is interposed.

  However, since the silicone sheet 93 as described above has a fixed shape, as described above, the size and thickness are adjusted in accordance with the size and shape of the heat generating component and further in accordance with the dimension between the heat generating component and the insulating sheet. It is necessary to prepare a wide variety of lineups, etc., which is troublesome and expensive. In addition, in the manufacturing process, it is necessary to select and mount an appropriate silicone sheet according to the size and shape of the heat-generating component, and also according to the dimensions between the heat-generating component and the insulating sheet, which improves work efficiency. It was also a problem from the point of view.

  In contrast to the above, an electronic component and a base case that provide an opening in an insulating sheet disposed on the base case side of the substrate, fills the base case side of the substrate with a heat radiation resin, and requires heat dissipation through the opening There is known a discharge lamp lighting device having a configuration in which the lamp is in contact with each other (see Patent Document 1).

  However, in the above discharge lamp lighting device, it is necessary to prepare an insulating sheet in which an opening is formed at a predetermined position in advance. Accordingly, when manufacturing different types of discharge lamp lighting devices having the same dimensions of the base case and the like but having different electronic components mounted on the substrate, several types of insulating sheets must be prepared. Moreover, it is necessary to select and mount an insulating sheet according to the model, which is also a problem from the viewpoint of work efficiency.

  The present invention solves the problems of the above-mentioned conventional electric devices such as lighting devices, and has various sizes and shapes according to the size and shape of the heat generating component such as a silicone sheet. It is an object of the present invention to provide an electric device that can be easily dissipated without using various kinds of insulating sheets.

  An electric device according to the present invention includes a base case configured in a bowl shape by a bottom surface portion and a pair of side wall portions continuous upward from both sides of the bottom surface portion; and a top plate portion and continuously from both sides of the top plate portion. A cover case having a pair of side plate portions formed so as to overlap the side wall portion of the base case, and the pair of side plate portions engaged so as to overlap with the side wall portion of the base case; an inner surface of the base case and the cover case An insulating sheet disposed on the inner surface of the base; and an electric circuit configured by a circuit board on which electrical components are mounted, the circuit board being disposed on the bottom surface side of the base case via the insulating sheet; Insulating heat radiating resin applied to at least one of the gaps or between the cover case and the insulating sheet.

  The insulating heat-dissipating resin has an insulating performance equivalent to that of the insulating sheet, and those that have received E-type insulator registration are suitable. As the insulating heat-dissipating resin, a predetermined grade of urethane resin, silicone resin or the like excellent in weather resistance and insulation can be used. The heat-generating component is a required electrical and electronic component that needs to be dissipated because it generates heat. Examples of the heat-generating component include, but are not limited to, a transformer, a transistor, and a capacitor. Moreover, what has thixotropy is suitable for insulating heat dissipation resin. Thixotropy means thixotropy, a property that increases fluidity when stirred and solidifies when allowed to stand, and does not flow even when placed on an inclined surface or vertical surface after coating. .

  Insulating heat radiation resin is usually applied to the required position, but it is excluded to apply over the entire surface between the base case and the insulating sheet or the entire surface between the cover case and the insulating sheet. It is not a thing.

  The electrical device according to the present invention is characterized in that the heat generating component mounted on the circuit board and the insulating sheet in contact with the insulating heat radiating resin are thermally connected by the same or other insulating heat radiating resin.

  It does not mean that the component or composition is different from other insulating heat radiating resins, but means that the insulating heat radiating resin applied to at least one of the base case or the cover case is different as a member. . Therefore, components and compositions include the same form. The same means the insulating heat radiation resin applied to at least one of the base case or the cover case, and the insulating heat radiation resin provided between the heat generating component mounted on the circuit board and the insulating sheet. It is meant to include being integral.

  A lighting fixture according to the present invention comprises: the electric device according to claim 1 or 2 used as a lighting device; a light source that is turned on by the lighting device; and a fixture body on which the lighting device and the light source are arranged. It is characterized by doing.

  The electrical device according to the present invention has a structure in which an insulating heat radiation resin is applied between at least one of the base case and the insulating sheet or between the cover case and the insulating sheet. If they are connected, heat can be radiated from the applied insulating heat radiating resin through these sheets, and heat can be conducted from the insulating heat radiating resin to the base case and the cover case to radiate heat. For this reason, it is possible to easily and efficiently dissipate heat without using various insulating sheets. Further, even when the insulating sheet is securely adhered to the base case or the cover case by the insulating heat radiating resin and the insulating sheet is bent or warped, stable mounting can be realized.

  In the electrical device according to the present invention, the heat generating component mounted on the circuit board and the insulating sheet in contact with the insulating heat radiating resin are thermally connected by the same or other insulating heat radiating resin. Heat can be radiated through the insulating sheet, and heat can be easily and efficiently radiated.

  According to the lighting fixture which concerns on this invention, the lighting fixture provided with the electric equipment of Claim 1 or 2 can be provided.

1 is a partially omitted assembly perspective view showing a discharge lamp lighting device that is an embodiment of an electrical apparatus according to the present invention. The partial cross section side view which shows the principal part structure in embodiment of the discharge lamp lighting device which is an Example of the electric equipment which concerns on this invention. The top view which shows the back surface principal part of the circuit board used for the discharge lamp lighting device which is the Example of the electric equipment which concerns on this invention. The perspective view which shows the structure of the lighting fixture comprised using the Example which concerns on the electric equipment of this invention. The partial cross section side view which shows the principal part structure of the discharge lamp lighting device which is the prior art example of an electric equipment.

  Hereinafter, with reference to the accompanying drawings, embodiments of electrical equipment and lighting equipment such as lighting devices according to the present invention will be described. In each figure, the same components are denoted by the same reference numerals, and redundant description is omitted. FIG. 1 shows a discharge lamp lighting device which is an embodiment of an electric apparatus according to the present invention.

  The discharge lamp lighting device 1 includes a base case 2, a first insulating sheet 3, a lighting circuit 4, a cover case 5, and a second insulating sheet 7 as main components. The first edge sheet 3 is arranged along the inner side of the base case 2 and blocks electrical connection between the metal base case 2 and the lighting circuit 4. The lighting circuit 4 has a configuration in which electrical components are mounted on a circuit board 6. The cover case 5 has the function of a lid that covers the base case 2, and a second insulating sheet 7 having an R shape corresponding to an upwardly convex semicircular arc is disposed along the inside of the cover case 5. Is done. The lighting circuit 4 is housed in a state of being covered with the first insulating sheet 3 and the second insulating sheet 7 in a housing constituted by the cover case 5 and the base case 2.

  The base case 2 is configured, for example, by bending a single metal flat plate and providing a pair of side wall portions 2b, 2b on both sides of the bottom surface portion 2a. As the metal, for example, a steel plate material is used. The bottom surface portion 2a is formed in an elongated rectangular shape. The pair of side wall portions 2b and 2b are bent upward from both sides so as to extend along the longitudinal direction of the bottom surface portion 2a, and the base case 2 as a whole is formed in a substantially bowl shape substantially orthogonal to the bottom surface portion 2a and facing each other. Has been.

  The pair of side wall portions 2b, 2b are respectively formed with a hole 8 as an engaging portion and a rectangular through hole 10 at one end side 2ba in the longitudinal direction and the other end side (not shown) and the center position. The hole 8 is formed in a circular shape and is sized to engage with a convex portion (convex toward the base case 2) 16 that is an engaging portion of the cover case 5.

  Further, in the pair of side wall portions 2b and 2b, long substrate support step portions 22 projecting inward of the side wall portions 2b and 2b are respectively provided at one end side 2ba in the longitudinal direction and the other end side (not shown) and the center position. Is formed. A total of six board support steps 22 support the circuit board 6 via the first insulating sheet 3. Further, a mounting hole 12 is formed in one end side 2aa in the longitudinal direction of the bottom surface portion 2a and the other end side (not shown).

  The first insulating sheet 3 is made of an insulating resin formed in a flat shape, for example, an elastic resin such as polyethylene terephthalate (PET) having a thickness of about 0.2 to 1.0 mm, and extends along the inner surface of the base case 2. The base case 2 is partially protruded upward from the side walls 2b and 2b. The material and thickness of the second insulating sheet 7 are provided.

  The lighting circuit 4 is configured by mounting electrical components on a circuit board 6. On the upper surface 6 a of the circuit board 6, an input terminal block 13 is disposed on one end side 6 b, and an output terminal block is disposed on the other end side (not shown). A power supply line from a commercial AC power supply is connected to the input terminal block 13, and a lead wire connected to a lamp socket to which a discharge lamp is mounted is derived from the output terminal block.

  The electrical component is mounted between the input terminal block 13 and the output terminal block of the circuit board 6, and a direct current that converts an alternating voltage into a direct current voltage by a capacitor C1, an inductor L1, and a transistor (not shown). A power supply circuit, an inverter circuit that converts a DC voltage into a high-frequency AC voltage, and a resonance circuit that applies a resonance voltage to the discharge lamp are formed. The lighting circuit 4 is disposed on the bottom surface 2 a side of the base case 2 via the first insulating sheet 3.

  The cover case 5 is made of, for example, a steel plate material, and includes a pair of side plate portions 5c and 5c and a top plate portion 5a that connects the pair of side plate portions 5c and 5c. More specifically, the cover case 5 is formed by bending a single flat plate. The cover case 5 is connected to the rectangular top plate portion 5a and both ends along the longitudinal direction of the top plate portion 5a and the top plate portion. A pair of inclined plate portions 5b and 5b that are inclined inward with respect to 5a are provided. The pair of inclined plate portions 5b and 5b are provided with a pair of side plate portions 5c and 5c that are substantially parallel to each other along the longitudinal direction thereof. Further, a pair of end plate portions 5d and 5d formed so as to be substantially orthogonal to the top plate portion 5a are connected to the top plate portion 5a at both ends in the longitudinal direction of the top plate portion 5a. The end plate portions 5d and 5d have a substantially pentagonal planar shape and substantially close the upper side of the openings 14 at both ends in the longitudinal direction of the cover case 5. The side plate portions 5c and 5c are connected to both sides along the longitudinal direction of the top plate portion 5a via the inclined plate portions 5b and 5b.

  On the one end side 5cb, 5cb and the other end side (not shown) of the pair of side plate portions 5c, 5c, a convex portion (convex toward the base case 2 side) 16 and a claw hole portion 9 are formed. Has been. The convex portion 16 is formed by pressing the outer surface 5cc of the side plate portion 5c, for example, by pressing, and protrudes from the inner surface 5cd of the side plate portion 5c to the inside of the cover case 5. The projecting surface is formed in a substantially spherical shape (elliptical shape). The convex part 16 is formed in a so-called dowel structure. The distance from the claw hole portion 9 to the convex portion 16 is set to be long enough to avoid the range of the influence of warping that occurs in the vicinity of the base portion 9a that occurs when the claw portion 9c is bent.

  When connecting the cover case 5 to the base case 2, the pair of side wall portions 2 b and 2 b of the base 2 are sandwiched between the side plate portions 5 c and 5 c of the cover case 5. As a result, the inner surfaces 5cd and 5cd of the side plate portions 5c and 5c of the cover case 5 overlap the outer surfaces of the pair of side wall portions 2b and 2b of the base case 2. And if the cover case 5 is pressed and moved to the bottom face part 2a side of the base case 2, the convex part 16 of the cover case 5 will ride on the outer surface of the side wall parts 2b and 2b.

  When the pair of side plate portions 5c and 5c overlap the pair of side wall portions 2b and 2b of the base case 2, the convex portion 16 fits into the holes 8 provided in the side wall portions 2b and 2b. At this time, the projecting surface of the convex portion 16 comes into contact with the edge portion of the substantially entire circumference of the hole 8. Thereby, the convex part 16 is firmly fixed to the hole 8 and does not move in the hole 8.

  The claw hole portion 9 is formed by cutting the outer surface 5cc of the side plate portion 5c. A claw portion 9c is formed in the claw hole portion 9 so as to face the protruding width direction of the side plate portion 5c (a direction orthogonal to the longitudinal direction of the side plate portion 5c). In a state where the cover case 5 is connected so as to cover the base case 2, the claw hole portion 9 of the cover case 5 overlaps the through hole 10 of the base case 2. Here, the claw portion 9c is folded inward from the through hole 10 by using a jig for bending the claw portion 9c by pressing a portion corresponding to the opening 15 of the claw hole portion 9 in the inner surface direction.

  When the cover case 5 is put on the base case 2, the lower end portion of the second insulating sheet 7 having an R shape arranged along the inner side of the cover case 5 is the upper end portion of the first insulating sheet 3. Covered. As a result, the circuit board 6 except for the terminal block 13 and the like is wrapped in the first insulating sheet 3 and the second insulating sheet 7 and is electrically insulated from the outside.

  In this embodiment, it has a mounting structure as shown in FIG. An electronic component 51 is mounted on the circuit board 6, and a chip component 52, which is a heat generating component, is mounted on the back surface 61 of the circuit board 6. In this example, an insulating heat radiation resin 60 is provided between the chip component 52 and the first insulating sheet 3 in order to thermally couple the chip component 52 and the first insulating sheet 3.

  In the present embodiment, a structure in which an insulating heat radiation resin 60A is applied between the base case 2 and the first insulating sheet 3 (or between the cover case 5 and the second insulating sheet 7) may be used. I have. The insulating heat radiating resin 60 </ b> A and the insulating heat radiating resin 60 have the same composition, but are separate and have a relationship in which thermal coupling occurs via the first insulating sheet 3. Of course, the insulating heat radiation resin 60 </ b> A and the insulating heat radiation resin 60 can be integrally formed by making a hole in the same position of the insulating sheet 3 (or 2).

  In the present embodiment having such a configuration, the chip is formed using the required amount of the insulating heat-dissipating resin 60 according to the shape and size of the chip component 52 and according to the distance between the chip component 52 and the first insulating sheet 3. What is necessary is just to couple | bond between the components 52 and the 1st insulating sheet 3, and it is not necessary to prepare multiple types of things which have a specific shape and a specific magnitude | size like a silicone sheet.

  In addition, the chip component 52 is radiated by the insulating heat radiating resin 60 that is directly bonded, and is also radiated by the insulating heat radiating resin 60 </ b> A that is bonded through the first insulating sheet 3. Further, the heat radiation from the base case 2 can be expected through the insulating heat radiation resin 60A.

  With the configuration as described above, it is sufficient to prepare one type of each of the first insulating sheet 3 and the second insulating sheet, and the number of components is reduced, but several types of electronic components mounted on the circuit board 6 are different. There is no change in manufacturing electrical equipment. Therefore, in order to manufacture different models, it is necessary for an operator to recognize the model currently manufactured. Here, the outline silk display is usually the same color for components mounted on a common circuit board in product development, and a common silk is used for each component. For this reason, although the circuit board 6 is the same as described above, when manufacturing a product of a model in which the constants of electronic components mounted on the circuit board 6 are different, it is determined which model depending on the silk of the circuit board 6. I can't.

  Therefore, in the present embodiment, an identification for identifying a model at a predetermined position of the circuit board 6 by a dispenser (liquid metering device) used when applying the insulating heat radiation resin 60 to the heat generating component mounted on the circuit board 6. The mark is drawn by the insulating heat radiation resin 60. In the example of FIG. 2, the identification mark 63 is drawn by the insulating heat radiation resin 60 in the vicinity of the predetermined end 62 of the back surface 61 of the circuit board 6.

  FIG. 3 is a plan view showing the vicinity of the region where the identification mark 63 is drawn on the back surface 61 of the circuit board 6. Here, two bars BB are drawn, and the two indicate a specific model (for example, the second model). In short, the operator recognizes which model is manufactured by looking at the identification mark 63 and avoids mistakes in the parts to be mounted. According to this configuration, the identification mark 63 can be drawn in the step of applying the insulating heat-radiating resin 60 to the chip component which is a heat-generating component, which is extremely efficient without preparing a separate step.

  The position of the identification mark 63 is merely an example, and may be on the surface side of the circuit board 6. Further, the material to be applied by the dispenser is not limited to the insulating heat radiating resin. For example, the identification mark 63 may be drawn by the dispenser using an adhesive or the like as a material.

  In FIG. 4, the Example of the lighting fixture which concerns on this invention is shown. The luminaire 30 is a luminaire directly attached to a ceiling surface or the like, and a pair of lamp sockets 18 and 18 are provided at both ends of a substantially frame-like fixture body 17. A straight tube fluorescent lamp 19 as a discharge lamp is mounted on the lamp sockets 18 and 18. In addition, the instrument body 17 is provided with a reflecting plate 20 having a substantially dish-shaped cross section facing the fluorescent lamp 19, and the surface of the reflecting plate 20 is a reflecting surface 20a.

  Further, the appliance main body 17 has the discharge lamp lighting device 1 shown in FIG. 1 fixed to the mounting hole 12 provided in the bottom surface portion 2 a of the base case 2 with a screw inside the reflector 20. When the discharge lamp lighting device 1 is supplied with power, the fluorescent lamp 19 is lit.

  The lighting fixture 30 can easily secure an installation space by reducing the size of the discharge lamp lighting device 1 and can be formed at a low cost by reducing the cost of the discharge lamp lighting device 1.

2 Base case 3 First insulating sheet 5 Cover case 6 Circuit board 7 Second insulating sheet 52 Chip parts 60, 60A as heat-generating parts Insulating heat radiation resin 63 Identification mark

Japanese Patent No. 4133597

Claims (3)

A base case configured in a bowl shape by a bottom surface portion and a pair of side wall portions continuous upward from both sides of the bottom surface portion;
A pair of side plates formed so as to overlap the side wall of the base case continuously from both sides of the top plate and the top plate, and the pair of side plates overlaps with the side wall of the base case An engaged cover case;
An insulating sheet disposed on the inner surface of the base case and the inner surface of the cover case;
An electric circuit configured by a circuit board on which electrical components are mounted, the circuit board being disposed on the bottom surface side of the base case via an insulating sheet;
An electric device comprising: an insulating heat radiation resin applied to at least one of a base case and an insulating sheet or between a cover case and an insulating sheet. 2. The electric device according to claim 1, wherein the heat generating component mounted on the circuit board and the insulating sheet in contact with the insulating heat radiating resin are thermally connected by the same or other insulating heat radiating resin. The electric device according to claim 1 or 2 used as a lighting device;
A light source to be turned on by the lighting device;
A lighting fixture comprising: a lighting device and a fixture main body on which a light source is arranged.

Images