JP4682762B2 - Electronic device, lighting device, and lighting fixture - Google Patents

Description

  The present invention relates to an electronic device having excellent waterproof performance, a lighting device for lighting a discharge lamp with the electronic device, and a lighting fixture including the lighting device.

  In a lighting fixture installed outdoors or in a high humidity environment, a lighting device for lighting a discharge lamp included in the fixture may be exposed to high humidity. The lighting device for this application is required to be waterproof.

  An inverter lighting device is an electronic device formed by mounting a plurality of electrical components on a circuit board. Conventionally, a technique for waterproofing an inverter lighting device using a waterproof case is known (for example, see Patent Document 1).

The waterproof case used in this technology is formed of a cylindrical storage case and a side plate and stores the inverter lighting device. The side plates hermetically seal the opening portions at both ends of the cylindrical storage case made of an integrally molded product that has no seam in cross section.
Japanese Patent Laying-Open No. 2003-7212 (paragraphs 0004, 0005, 0008-0019, FIGS. 1 to 14, 17, and 19)

  In the technique of Patent Document 1, the inverter lighting device itself is assembled with a case that forms an outline thereof, and this lighting device is accommodated in a waterproof case. For this reason, the waterproof case which makes the outline of the whole lighting device is large. At the same time, in addition to the labor for assembling the inverter lighting device, the labor for housing the device in the cylindrical case and the labor for assembling the waterproof case are required. Therefore, the number of assembling steps for the lighting device is large. Therefore, as described above, in addition to an increase in cost due to the use of a large waterproof case itself, a large cost is required for assembling, so that the cost is high.

  Furthermore, in the technique of Patent Document 1, an inverter lighting device is fixed on a U-shaped fixing plate, and this fixing plate is housed in a waterproof case. As a result, the outer casing of the inverter lighting device is thermally insulated from the waterproof case by air, which is disadvantageous in efficiently transferring heat generated by the inverter lighting device to the waterproof case.

  An object of the present invention is to provide an electronic device, a lighting device, and a lighting fixture that have excellent heat dissipation performance and waterproof performance, are lightweight and can improve assembly workability.

In order to solve the above problems, an electronic device according to a first aspect of the present invention includes a circuit board and a circuit module including a plurality of electrical components mounted on the board to form an electronic circuit; and a case for housing the circuit module A raised bottom-shaped closing portion having a protruding portion that protrudes toward the circuit board and has a plurality of portions having different protruding heights corresponding to the height of the electrical component, and one end is closed by the closing portion. The metal case main body, and the case having a lid with the other end of the case main body closed; and having a heat dissipation property, a waterproof property, and an electrical insulation property, and filling the circuit module ; A filler that covers the soldering surface, and a filler that fills the case by forming a gap between the filler and the lid ; and a mounting portion for attaching the lighting fixture to the metal chassis Formed There are a metallic pressing member is fixed by a screw to the case body attached to the peripheral portion of the closure part in the case body; is characterized by comprising a.

  In the present invention, as the metal material forming the case body, a light metal that is lightweight and excellent in heat dissipation to the outside, for example, an aluminum alloy can be suitably used, but an iron-based metal material can also be used. In the present invention, the case main body and the closing portion may be formed by connecting members formed separately from different materials, or may be integrally formed when the closing portion is made of the same metal as the case main body. .

  In the present invention, when the closing portion is made of a material different from the case body, the closing portion may be formed of an electrically insulating material for insulation from the electrical components of the circuit module, for example, synthetic resin or rubber. You can make a closure. As a synthetic resin for forming a closed portion separate from the case body, a synthetic resin having a low material cost and having heat resistance that can withstand the heat curing temperature of the filler, such as polypropylene (PP) and polyethylene terephthalate (PET), is preferably used. be able to. For example, ethylene propylene rubber (EPDM) can be used as the rubber that forms the closed portion separate from the case body.

  In the present invention, a synthetic resin such as a silicon resin, a urethane resin, an epoxy resin, an unsaturated polyester resin, or the like can be used as the filler. Use of a urethane resin is preferable in that the material cost is low. When silicon resin, unsaturated polyester resin, or the like is used, higher heat dissipation can be obtained.

In the first aspect of the present invention, the case includes a closing portion, and the circuit board and the electrical components of the circuit module accommodated in the case are embedded in an electrically insulating and waterproof filler filled in the case. For this reason, even if it does not give waterproofness to the case itself, the circuit module can be waterproofed to withstand a high humidity environment by the filler in the case. At the same time, the filling material filled in the case with the circuit module embedded is in close contact with the circuit module and the inner surface of the case, and since this filling material is used as a heat conduction path, the heat generated in the circuit module is efficiently used. Heat can be transferred to the case well. In addition, since the holding member is made of metal, it can function as a heat radiating plate that releases heat transmitted from the case main body via a screw or the like to the outside. Therefore, the heat of the circuit module can be released from the outer surface of the metal case body that the case has, and the temperature rise of the circuit module can be suppressed.

  Furthermore, in the invention of claim 1, a waterproof case for housing the electronic device of the present invention is not required for waterproofing the circuit module. In addition, since the case is provided with a closing portion, the amount of filler used is reduced, and the electronic device can be reduced in weight. Moreover, the time required to inject the filler into the case can be shortened by the closing portion.

  According to a second aspect of the present invention, which is a preferred embodiment of the present invention, the closing portion is separate from the case main body, and is an annular flange portion that is liquid-tightly attached to one end opening edge of the case main body, and the flange It is characterized by having a projecting portion that is integrally provided inside the portion and projects toward the circuit board.

  In the present invention, one or more projecting portions of the closing portion can be provided. It is preferable that the projecting portion is provided away from the inner surface of the case main body and a passage is formed in the separated portion. When supporting a part of the electrical components of the circuit module accommodated in the case with the protruding portion, the circuit module in the case can be positioned in the thickness direction of the case, but this positioning need not be performed.

  In the invention of claim 2, which is provided with a closing part separate from the case main body, it is possible to use a closing part that is optimally formed according to the arrangement of the electrical components. For this reason, when there is a design change of an electronic circuit including a change of an electrical component used for the electronic circuit, the case body and the lid are common parts among the parts making the case, and only the closing part is changed, This is preferable in that it can cope with a design change.

  In order to solve the above-described problem, a lighting device according to a third aspect of the present invention is characterized in that a discharge lamp is turned on by the electronic device according to the first or second aspect.

  The lighting device of the present invention may be a lamp that is normally lit or may be lit in an emergency such as a power failure.

  Since the invention according to claim 3 is a lighting device for lighting a discharge lamp by the electronic device according to claim 1 or 2, even if the case itself is not waterproof, the circuit is formed by the filler filled in the case. The module can be waterproofed. For this reason, the waterproof performance which can endure a high humidity environment without requiring a waterproof case can be obtained. Furthermore, the heat radiation performance from the circuit module to the case can be improved by the filler filled in the case. Moreover, the amount of the filler used can be reduced and the weight can be reduced by the closed portion of the case, and accordingly, the time required to inject the filler into the case can be shortened.

  In order to solve the above-mentioned problems, a lighting fixture according to a fourth aspect of the present invention includes a chassis; a lamp socket attached to the chassis; a discharge lamp removably supported by the socket; and attached to the chassis. And the lighting device according to claim 3 for lighting the discharge lamp.

  Since the lighting device provided in the lighting fixture of the present invention is the one described in claim 3, the lighting fixture provided with the lighting device that has excellent heat dissipation performance and waterproof performance, is lightweight and can improve assembly workability. Can provide.

  According to the electronic device of the first aspect of the present invention, it has excellent heat dissipation performance and waterproof performance, is lightweight, and can improve assembly workability.

  According to the electronic device of the second aspect of the present invention, since the closed portion separate from the case main body is provided, it is possible to easily cope with a design change of the electronic circuit.

  According to the lighting device of the invention according to claim 3, while having excellent heat dissipation performance and waterproof performance, it is lightweight and can improve assembly workability.

  According to the invention which concerns on Claim 4, while having the outstanding heat dissipation performance and waterproof performance, it can provide the lighting fixture provided with the lighting device which is lightweight and can improve assembly workability | operativity.

  A first embodiment of the present invention will be described with reference to FIGS.

  The luminaire denoted by reference numeral 1 in FIG. 1 is used with a favorable waterproof property as an outdoor lamp, a tunnel lamp installed in a tunnel, an eaves lamp of a station building, or the like. The luminaire 1 includes a chassis 2, a lamp socket 3, a discharge lamp such as a fluorescent lamp 4, and a waterproof electronic device such as a waterproof lighting device 5. The lighting device 5 functions as an electronic ballast for lighting the fluorescent lamp 4.

  The chassis 2 illustrated in FIG. 1 is made of metal and has a rectangular parallelepiped shape. The lamp sockets 3 protrude downward, for example, at both ends in the longitudinal direction of the chassis 2. The fluorescent lamp 4 is detachably supported by the lamp socket 3. A lighting device 5 for lighting the fluorescent lamp 4 is built in the chassis 2.

  As shown in FIGS. 2 to 4, the lighting device 5 includes a circuit module 11, a case 21, and a filler 41.

  The circuit module 11 turns on the fluorescent lamp 4. As shown in FIGS. 3 and 4, the circuit module 11 is formed by mounting a plurality of electrical components 13 and the like forming a lighting circuit (electronic circuit) on an electrically insulating circuit board 12. Examples of the electrical component 13 include a semiconductor such as a power transistor, a resistor, a capacitor, a coil, a transformer, a diode, and other surface mount components such as various chip components. In FIG. 2 and FIG. 4, reference numeral 16 indicates an insulating coated electric wire electrically connected to the circuit board 12.

  As shown in FIG. 4, the circuit board 12 has a substantially rectangular shape with notched reliefs 12a at the four corners. One surface of the circuit board 12 is a component mounting surface, and most of the electrical components 13 are mounted on this surface. The other surface of the circuit board 12 is a soldering surface on which a circuit pattern is printed. This soldering surface is covered with an electrically insulating resist layer. The circuit board 12 is provided with filler through portions 12b and 12c each having a notch or a through hole so as to avoid the circuit pattern.

  The electrical components 13 other than the surface mounting components are mounted on the circuit board 12 by flow soldering. That is, the electrical component to be flow soldered has a pin-like terminal that penetrates the circuit board 12, and this terminal is soldered to each land of the circuit pattern by the flow soldering process. Mounted on the surface.

  The lighting circuit is a combination of a circuit pattern and a plurality of electrical components 13 connected thereto, and includes, for example, an inverter circuit section.

  In FIG. 3, reference numeral 13a denotes a power transistor that is one of the electric components 13 that generate heat. In the case of the present embodiment, a plurality of power transistors 13 a (only one is shown) are provided so as to be arranged along one side edge of the circuit board 12. Reference numeral 14 in FIGS. 3 and 4 denotes a metal heat sink 14 connected to the power transistor 13a. The heat radiating plate 14 extends over the plurality of power transistors 13 a and is provided so as to be bent at a right angle with respect to the circuit board 12 in a state of protruding from the side edge of the circuit board 12. The heat radiating plate 14 extends along the one side edge of the circuit board 12 and has a plurality of screw holes 15. The heat radiating plate 14 is fixed to one side wall 22b of the case main body 22 to be described later by a screw denoted by reference numeral 17 in FIGS.

  Note that the heat-generating electrical components such as the power transistor 13a can be mounted indirectly via the heat sink 14 without being mounted directly on the circuit board 12. That is, the heat radiating plate 14 is formed from a mounting piece and a component mounting piece bent at a right angle from the mounting piece, and the mounting piece is fixed to the circuit board 12, and a heat generating electrical component such as the power transistor 13a is attached to the component mounting piece. You may wear it. In this case, the screw hole 15 is provided in the component mounting piece avoiding the heat generating electrical component. This configuration is preferable in that it easily transfers the heat of the heat generating electrical component directly to the case body 22 described later.

  As shown in FIGS. 2 to 4, the case 21 that forms the outline of the lighting device 5 includes a case main body 22, a closing portion 26, and a lid 35.

  The case body 22 is preferably made of a metal, for example, an aluminum alloy excellent in heat dissipation. Instead of this, it is also possible to use a ferrous metal with a low material cost. The case main body 22 made of an aluminum alloy extruded mold has a rectangular frame shape in which both upper and lower ends are opened.

  Corner column portions 22a corresponding to the reliefs 12a are formed on the inner surfaces of the four corners of the case body 22, and screw holes 23 are provided at the four corners. The screw holes 23 are opened on the upper and lower surfaces of the case body 22. A plurality of screw holes 24 corresponding to the screw holes 15 are provided on one side wall 22 b of the case body 22. The other side wall 22c that is connected to the one side wall 22b at a right angle is provided with an electric wire passage portion 25 that is a notched portion that opens to the lower surface.

  The closing portion 26 is formed separately from the case main body 22 and is preferably an integrally molded product of an inexpensive electrical insulating material having heat resistance, for example, a synthetic resin, specifically, polypropylene (PP). The closing part 26 has an annular flange part 27 and a protruding part 28. The closing portion 26 made of synthetic resin has such strength that it does not deform due to the weight of the circuit module 11 and the filler 41 when the lighting device 5 is assembled later. Since the protrusion 28 contributes to obtaining this strength, the closing portion 26 can be made quite thin.

  The annular flange portion 27 includes a peripheral portion of the closing portion 26. The annular flange portion 27 is a portion that is liquid-tightly attached to one end opening edge (the upper end opening edge in FIGS. 3 and 4) of the case body 22. A holding member 29 is used for this attachment. The pressing member 29 is made of, for example, the same type of metal as the case main body 22 and is integrally extended from both ends of the flat cover portion 29a having the same size as the opening edge of the case main body 22 and the cover portion 29a. And a mounting portion 29b.

  The holding member 29 is fixed to the case main body 22 by a metal screw 30 screwed into each screw hole 23 with the annular flange portion 27 of the closing portion 26 sandwiched between one end opening edge of the case main body 22. By this fixing, the annular flange portion 27 is in close surface contact with the one end opening edge of the case main body 22 and the pressing member 29 and is sandwiched therebetween, so that the cover portion 29a of the case main body 22 and the pressing member 29 is sandwiched therebetween. Is sealed by the annular flange 27.

  The protruding portion 28 of the closing portion 26 is integrally provided inside the annular flange portion 27. The protruding portion 28 protrudes toward the circuit board 12 of the circuit module 11 accommodated in the case body 22 as described later (see FIG. 3). The four circumferences of the projecting portion 28 are provided so as to be separated from the inner surface of the case main body 22, and are inclined, for example. As a result, a larger contact area of the filler 41 to the inner surface of the case body 22 can be secured.

  As illustrated in FIG. 4, the protruding portion 28 has a plurality of portions having different protruding heights and has an uneven shape. The uneven shape corresponds to the arrangement of the electrical component 13 with respect to the circuit board 12. In other words, the plurality of portions 28a having a low height of the protruding portion 28 are provided corresponding to the electric component 13 having a high height such as a transformer, and the portion 28b having a high height of the protruding portion 28 is an electric component having a low height such as resistance. 13 is provided. In addition, in this embodiment, although the single protrusion part 28 which makes uneven | corrugated shape was provided, it may replace with this and may provide a some protrusion part according to arrangement | positioning, height, etc. of the electrical component 13. FIG.

  As shown in FIG. 3, the plurality of portions 28 a provided in the projecting portion 28 are formed at a height that hits the tip of a tall electrical component 13 such as a transformer corresponding to the position. The portion 28b of the protruding portion 28 may or may not be in contact with an electrical component having a low height such as resistance corresponding to the position.

  The pressing member 29 has a cover portion 29 a that covers the closing portion 26 as a preferred example. For this reason, the closing member 26 can be protected by the pressing member 29, and the appearance of the lighting device 5 can be improved by preventing the depression due to the closing portion 26 from being visually recognized on the outer surface of the lighting device 5 in a single product state. . Furthermore, since the pressing member 29 is made of metal, it can also function as a heat radiating plate that releases heat transmitted from the case main body 22 via the screw 30 and the like to the outside. A gap G1 is formed between the cover portion 29a and the protruding portion 28 of the closing portion 26 facing the cover portion 29a.

  The pair of attachment portions 29b included in the presser member 29 is fixed to the chassis 2 by a fixing component 31 such as a screw that passes through the attachment portions 29b. Thereby, the lighting device 5 is attached to the chassis 2 with the cover portion 29 a facing the chassis 2. The attachment portion 29 b also functions as a heat transfer path that transmits a part of the heat generated in the lighting device 5 to the chassis 2.

  The lid 35 is made of, for example, a flat plate made of the same kind of metal as the case main body 22. The lid 35 is fixed to the case main body 22 by a metal screw 36 that is closed in the other end opening of the case main body 22 and screwed into each screw hole 23. The fixing portion of the lid 35 does not need to be sealed, and therefore the case 21 does not have a waterproof structure. Since the lid 35 is made of metal, it can also function as a heat radiating plate that releases heat transmitted from the case main body 22 via the screw 36 and the like to the outside.

  The filler 41 is made of a synthetic resin having heat dissipation, waterproofness, and electrical insulation. In this embodiment, as a preferred example, a urethane resin mixed with a filler (not shown) is used as the filler 41. The filler is made of an inorganic material such as aluminum oxide. The heat dissipation of the filler 41 can be further improved by mixing the filler. The filler 41 is filled in the case 21 to embed the circuit module 11.

  As shown in FIG. 3, the filler 41 has a first filling layer 41a and a second filling layer 41b, and these both layers are continuous with each other. The first filling layer 41 a is provided so as to fill a space between the component mounting surface including one surface of the circuit board 12 and the closing portion 26. The second filling layer 41b covers the soldering surface, which is the other surface of the circuit board 12, and fills the terminals of the electrical component 13 protruding from this surface and the surface mounting component (not shown) mounted on the same surface. Is provided. A gap G <b> 2 is formed between the second filling layer 41 b and the lid 35.

  Next, the assembly procedure of the lighting device 5 will be described. This assembly is performed through a case semi-finished product assembly process, a module housing process, a filling process, a curing process, and a finishing process.

  In the case semi-finished product assembly step, the case semi-finished product is assembled by attaching the closing portion 26 to the case main body 22 using the pressing member 29 and the screw 30. In this case, the annular flange portion 27 of the closing portion 26 is overlaid on one end opening edge of the case body 22 and the cover portion 29a of the pressing member 29 is overlaid on the annular flange portion 27, and then the cover portion 29a and the annular flange portion 27 are overlapped. Is screwed into the screw hole 23 of the case main body 22. As a result, the protruding portion 28 of the closing portion 26 enters the case main body 22, and the case semi-finished product is assembled in a state where the one end opening of the case main body 22 is closed by the closing portion 26. In this case semi-finished product state, the one end opening of the case body 22 closed by the closing portion 26 is sealed by the packing action of the annular flange portion 27 sandwiched between the one end opening edge of the case body 22 and the pressing member 29. It is in the state.

  In the next module housing step, the case semi-finished product is placed in a posture in which the closing portion 26 and the pressing member 29 are positioned below the case body 22, and then the circuit module 11 to which the insulation-coated electric wire 16 has already been attached is The case is accommodated in the case body 22 with the mounting surface facing downward. This accommodation operation is performed using these corner column portions 22a as a guide in a state where the four corner reliefs 12a of the circuit board 12 are fitted into the corner column portions 22a of the case body 22.

  Therefore, the circuit modules 11 to be accommodated are positioned in the front-rear and left-right directions with respect to the case body 22 by the corner pillar portions 22 a at the four corners of the case body 22. Thereby, the heat sink 14 included in the circuit module 11 is arranged along the inner surface of the one side wall 22b of the case body 22. In addition, as a result of the housing, the tip of the tall electrical component that the circuit module 11 has hits the portion 28a that the projection 28 has in correspondence with these electrical components, and the housing depth of the circuit module 11 with respect to the case semi-finished product Is regulated. By this restriction, the screw hole 15 of the heat radiating plate 14 is positioned with respect to the screw through hole 24 of the one side wall 22b of the case body 22.

  Further, in the module housing step, the screw 17 is finally passed through the screw hole 24 and screwed into the screw hole 15 of the heat radiating plate 14. Thereby, the heat radiating plate 14 is brought into surface contact with the inner surface of the one side wall 22 b of the case main body 22, and the circuit module 11 is fixed in the case main body 22.

  In the next filling step, an uncured filler is filled into the case semi-finished product. In this case, the uncured filler is injected through the filler passage portion 12b made of, for example, a notch in the circuit board 12. By this injection, the space region corresponding to the first filling layer 41a is filled, and the space region corresponding to the second filling layer 41b covering the other surface of the circuit board 12 by the surplus at that time is filled. Filling is done.

  In this latter filling, the uncured filling is performed from the space area below the circuit board 12 to the upper side of the circuit board 12 through the filler passage portion 12c made of holes not used for injection of the uncured filling material. The material flows backward. Thereby, the air in the space region corresponding to the first filling layer 41a is satisfactorily replaced with the uncured filler injected into this region, so that the cavity caused by the residual air is closed with the circuit board 12. It can be prevented from being formed between the portion 26. In addition, in the case of poor filling, that is, when a cavity remains in the filler 41, there is a possibility that moisture accumulates therein, which is not preferable from the viewpoint of waterproofing and insulation.

  In the filling operation, the upper surface of the uncured filler accumulated on the circuit board 12 reaches a position slightly lower than the height position of the lower edge of the wire passage portion 25 with the wire passage portion 25 of the case body 22 as a guide. When it is stopped. The uncured filler that has accumulated on the upper side of the circuit board 12 until the filling is stopped fills the terminals of the electrical component 13 protruding from the soldering surface of the circuit board 12 and the surface-mounted component mounted on the same surface. ing.

  Since the bottom part of the case semi-finished product is closed by the closing part 26, in the above filling, the uncured filler passes between the case body 22 and the annular flange part 27 of the closing part 26 and leaks outside. Can be prevented. Thereby, while being able to prevent the external appearance defect of the lighting device 5, the dispersion | variation in the filling amount of the filler 41 can also be suppressed.

  In the above filling, it is preferable to use an uncured filler that has been defoamed in advance. Furthermore, it is good to perform a defoaming process with respect to the unhardened filler currently inject | poured into a case semi-finished product, or the uncured filler injected into the case semi-finished product. The defoaming treatment is performed by placing an uncured filler in a reduced pressure atmosphere. By such defoaming, voids due to residual bubbles can be prevented from being formed in the filler 41 that is cured as will be described later.

  In the next curing step, the unfinished filling material in which the circuit module 11 is embedded is cured by passing the filled case semi-finished product through a heat curing furnace (not shown). As a result, the cured filler 41 is in close contact with the circuit module 11 and also in close contact with the inner surface of the case body 22 and the like.

  In the next finishing step, the insulation-coated electric wire 16 is passed through the electric wire passage portion 25 of the case main body 22, and then the lid 35 is attached to the case semi-finished product to complete the assembly of the case 21. The lid 35 is fixed to the case semi-finished product by screwing screws 36 passing through the four corners into the screw holes 23 of the case body 22. The lighting device 5 shown in FIG. 2 can be assembled by the above procedure.

  Since this lighting device 5 has the projection part 28 in the closure part 26 with which it is provided, the amount of the filler 41 used is less than the volume of the gap G1 compared to the configuration using the closure plate without the projection part 28. Can be reduced correspondingly. Thereby, it is possible to reduce the filling operation time, reduce the cost of the lighting device 5 and thus the lighting fixture 1 including the lighting device 5, and further reduce the weight of the lighting device 5.

  In the lighting device 5, the filler 41 filled in the case 21 has excellent thermal conductivity, that is, heat dissipation. Therefore, the heat generated by the circuit module 11 embedded in the filler 41 can be quickly conducted to the metal case 21 and released from the outer surface of the case 21. Furthermore, since the heat sink 14 connected to the power transistor 13a that generates a large amount of heat is attracted and adhered to one side wall 22b of the metal case main body 22 with the screw 17, the power transistor 26a is connected to the case main body 22 from the power transistor 13a. The heat conduction through the heat sink 14 is reliable. Therefore, the heat of the circuit module 11 embedded in the filler 41 can be quickly released out of the case 21, and the temperature rise of the circuit module 11 can be suppressed.

  As described above, the filler 41 filled in the case 21 is electrically insulating and waterproof. For this reason, the waterproof performance of the filling material 41 can ensure the waterproof performance of the circuit module 11 on the circuit board 12 and the electrical component 13.

  Such a waterproof configuration for the circuit module 11 in the case 21 eliminates the need for a large waterproof case for housing the case 21. Therefore, the cost of the lighting device 5 can be eliminated and the case 21 itself needs to be waterproof. Therefore, the lighting device 5 can be provided with a waterproof performance that can withstand a high humidity environment.

  For this reason, the lighting device 5 can be configured in a small size. Moreover, in addition to assembling the lighting device 5, there is no need to store the lighting device 5 in the waterproof case and to assemble the waterproof case thereafter. Thereby, the assembly of the lighting device 5 is facilitated, and the cost for assembly can be reduced.

  Further, since the circuit module 11 of the lighting device 5 is embedded in the filler 41 as described above, the filler 41 can surely prevent dust. Thereby, it is suitable also as the lighting device 5 used in the place where there is a lot of dust, and thus the dust-proof lighting fixture 1 including the lighting device 5.

  FIG. 5 shows a second embodiment of the present invention. Since this embodiment is the same as the first embodiment except for the items described below, the same parts are denoted by the same reference numerals as those of the first embodiment and the description thereof is omitted.

  In the second embodiment, at least one of the case main body 22 and the holding member 29, for example, the holding member 29, the annular flange portion 27 is sandwiched between the annular flange portion 27 of the closing portion 26 made separately from the case main body 22. A bead 29c that protrudes toward is provided. The bead 29 c is formed in an annular shape that is continuous around the annular flange portion 27. A plurality of beads 29c can be provided. The other items are the same as those in the first embodiment, including the configuration not shown in FIG.

  Therefore, also in the second embodiment, the same effect as in the first embodiment can be obtained and the problem of the present invention can be solved. In addition, in a state where the closed portion 26 is fixed to the case main body 22 to make a case semi-finished product, the bead 29c of the pressing member 29 is strongly pressed so as to bite into the annular flange portion 27. Accordingly, in a state where the uncured filler is filled in the case semi-finished product, the filler leaks out of the case semi-finished product through the space between the case main body 22 and the annular flange portion 27 of the closing portion 26. It is excellent in that it can be surely prevented.

  FIG. 6 shows a third embodiment of the present invention. Since this embodiment is the same as the first embodiment except for the items described below, the same parts are denoted by the same reference numerals as those of the first embodiment and the description thereof is omitted.

  In 3rd Embodiment, the bead 27a which protrudes toward one side of the member which pinches | interposes the annular flange part 27 is provided in one surface of the annular flange part 27 of the closure part 26 produced separately from the case main body 22. As shown in FIG. For example, the bead 27 a protrudes toward the opening edge of the case body 22. Further, reference numeral 27b in FIG. 6 indicates a groove formed on the back side of the bead 27a, and the bead 27a is easily deformed by the groove 27b. The bead 27 a and the groove 27 b are formed in an annular shape that is continuous with the annular flange portion 27. A plurality of beads 27a can be provided. The other items are the same as those in the first embodiment including the configuration not shown in FIG.

  Therefore, in the third embodiment, the same operation as that of the first embodiment can be obtained to solve the problem of the present invention. In addition, in a state where the case 26 is fixed to the case body 22 as a semi-finished case, the bead 27a of the closure 26 is elastically deformed as shown by the solid line from the free state shown by the two-dot chain line in FIG. Thus, the case body 22 is strongly pressed against the opening edge. For this reason, in a state where the uncured filler is filled in the case semi-finished product, the filler leaks out of the case semi-finished product through between the case main body 22 and the annular flange portion 27 of the closing portion 26. It is excellent in that it can be surely prevented.

  7 and 8 show a fourth embodiment of the present invention. Since this embodiment is the same as the first embodiment except for the items described below, the same parts are denoted by the same reference numerals as those of the first embodiment and the description thereof is omitted.

  In the fourth embodiment, the case 21 is formed of a case main body 20 and a lid 35 fixed to the case main body 20 with a screw 36. The case main body 20 is a metal integrally formed product, for example, an aluminum alloy die-cast product. The case main body 20 includes a case main body 22A, a closing portion 26A that closes one end opening of the case main body 22A, and an attachment portion 29B that extends from a pair of side wall portions of the case main body 22A.

  The case main body 22A corresponds to the case main body described in the first embodiment. However, the case main body 22A is different from the case main body in that a positioning protrusion 22d having the same height is integrally provided on the inner surface of each side wall. It is different from the case body described in the embodiment. The closing portion 26A corresponds to the closing portion described in the first embodiment, and includes a protruding portion 28 having portions 28a and 28b having different heights depending on the height of the electrical component as shown in FIG. Yes. The attachment portion 29B corresponds to the attachment portion described in the first embodiment.

  The circuit module 11 is positioned at a predetermined accommodation depth and is accommodated in the case main body 20 by placing each of the four sides of the circuit board 12 on the convex portion 22d. In this accommodated state, the tips of all the electrical components 13 mounted on the component mounting surface of the circuit board 12 are separated from the portions 28a and 28b of the protruding portion 28 with a predetermined insulation distance. Therefore, when the case main body 20 in which the circuit module 11 is accommodated is filled with the uncured filler, a part of the filler is filled between the projecting portion 28 and the electric component 13, and a predetermined electric power is supplied. Mechanical insulation is secured. Matters other than those described above are the same as those in the first embodiment including configurations not shown in FIGS. 7 and 8.

  Therefore, also in the fourth embodiment, the same operation as in the first embodiment can be obtained and the problem of the present invention can be solved. Moreover, the case main body 22A, the closing portion 26A, and the plurality of attachment portions 29B are provided with the case main body 20 so that the number of parts constituting the case 21 can be reduced, and the assembly man-hour can be reduced. ing. Further, since heat conduction from the case body 22A and the closed portion 26A, which are integral with each other, is excellent, the heat of the circuit module 11 can be released from the case main body 20 more efficiently. In addition, since the case main body 22A and the closing portion 26A are integrally formed, it is also excellent in that the uncured filler filled in the case main body 20 does not leak to the outside.

  9 to 11 show a fifth embodiment of the present invention. Since this embodiment is the same as the first embodiment except for the items described below, the same parts are denoted by the same reference numerals as those of the first embodiment and the description thereof is omitted.

  In the fifth embodiment, as shown in FIG. 9, the attachment portion 29 b bent in an L shape on each of two parallel sides of the holding member 29 having a rectangular shape protrudes in the opposite direction to the first embodiment. Is provided. Although the two attachment portions 29 shown in the figure are bent on each of the two sides, one attachment portion 29 may be provided on each side with the same length as each of the two sides. The protruding lengths of the attachment portions 29 are longer than the thickness of the case 21 as shown in FIG.

  Therefore, as shown in FIG. 11, the lighting device 5 can be fixed to the chassis 2 with a fixing component 31 such as a screw passing through the attachment portion 29 b of the pressing member 29 in a state where the case 21 is disposed inside the pressing member 29. it can.

  As shown in FIG. 10, a pair of groove forming convex portions 19 that form attachment grooves 18 between the inner surface of one side wall 22 b of the case main body 22 are integrally projected. These groove forming convex portions 19 extend over the entire length of the case body 22 in the thickness direction, and the shape viewed from the end surface is L-shaped. The openings of the pair of mounting grooves 18 extending in the thickness direction of the case main body 22 are opposed to each other. The width X of the opening of each mounting groove 18 is narrower than the width Y at the back of the mounting groove 18.

  The thickness Z of the heat sink 14 attached to the power transistor, which is a heat generating electrical component, is thicker than the width X and thinner than the width Y. The length of the heat radiating plate 14 is equal to the distance between the back portions of the pair of mounting grooves 18. When the circuit module 11 is housed in the case body 22, the heat sink 14 is slid along the inner surface of the one side wall 22b, and both end portions in the longitudinal direction of the heat sink 14 are inserted into the mounting grooves 18, respectively. The case body 22 is fixed. In addition, the insertion depth of the circuit module 11 is prescribed | regulated when the one electrical component contacts the closure part 26. FIG.

  The insertion of the heat sink 14 is allowed when the groove-forming convex portion 19 is accompanied by elastic deformation, and the heat sink 14 is brought into close contact with the inner surface of the one side wall 22b by this elastic deformation. Thereby, the heat sink 14 can be fixed in close contact with the inner surface of the one side wall 22b of the case main body 22 without requiring screwing. Therefore, a screw hole for screwing the heat radiating plate 14, a screw through hole for passing a screw through the one side wall 22 b, and screw parts can be omitted. Matters other than those described above are the same as in the first embodiment.

  Even in the fifth embodiment, it is possible to obtain the same operation as in the first embodiment and solve the problem of the present invention. In addition, as described above, it is not necessary to process the screw holes and screw through holes, and by omitting the screw parts, the number of steps can be reduced and the cost can be reduced.

  In addition, there is no need to provide a screw hole in the side wall 22b of the case body 22. For this reason, there is no fear of water immersion from the screw hole as in the case where there is a screw hole. At the same time, there is no fear that the uncured filler 41 leaks to the outside through the screw hole as in the case where the screw hole is provided, and the amount of the filler 41 due to the leakage of the filler 41 does not become insufficient. Therefore, the heat dissipation performance and waterproof performance of the circuit module 11 are not insufficient due to leakage until the filler 31 is cured, and the quality and reliability can be improved. Furthermore, in order to prevent the uncured filler 41 from leaking from the screw hole of the one side wall 22b of the case body 22, there is no need for a process such as a masking process. is there.

The perspective view which shows the lighting fixture which concerns on 1st Embodiment of this invention. The perspective view which shows the lighting device with which the lighting fixture of FIG. 1 is provided. Sectional drawing which shows the lighting device of FIG. The perspective view which decomposes | disassembles and shows the lighting device of FIG. Sectional drawing which shows a part of lighting device with which the lighting fixture which concerns on 2nd Embodiment of this invention is provided. Sectional drawing which shows a part of lighting device with which the lighting fixture which concerns on 3rd Embodiment of this invention is provided. Sectional drawing which shows the lighting device with which the lighting fixture which concerns on 4th Embodiment of this invention is provided. The perspective view which decomposes | disassembles and shows the lighting device of FIG. The perspective view which decomposes | disassembles and shows the lighting device with which the lighting fixture which concerns on 5th Embodiment of this invention is provided. The perspective view which shows each part of the case main body and heat sink with which the lighting device of FIG. 9 is provided in a separated state. Sectional drawing which shows the lighting device of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Lighting fixture, 2 ... Chassis, 3 ... Lamp socket, 4 ... Fluorescent lamp (discharge lamp), 5 ... Lighting apparatus (electronic device), 11 ... Circuit module, 12 ... Circuit board, 13 ... Electrical component , 21 ... Case , 22 ... Case body, 26 ... Closure part, 27 ... Annular flange part, 28 ... Projection part, 28a, 28b ... Site part forming the projection part, 29 ... Presser member, 29b ... Mounting part, 30 ... Screw, 35 ... Lid , 41 ... filler, 41a ... first packed bed, 41b ... second packed bed , G2 ... gap

Claims (4)

A circuit module comprising a circuit board and a plurality of electrical components mounted on the board to form an electronic circuit;
A case that accommodates the circuit module, and has a raised bottom-shaped closing portion having a protruding portion that protrudes toward the circuit board and includes a plurality of portions having different protruding heights corresponding to the height of the electrical component , A metal case main body whose one end is closed by the closing portion, and the case having a lid which closes the other end of the case main body;
It has heat dissipation, waterproofness, and electrical insulation, fills the circuit module , has a filling layer that covers the soldering surface of the circuit board, and forms a gap between the filling layer and the lid. And a filler filled in the case;
A metal pressing member that has a mounting portion to the metal chassis of the lighting fixture and is fixed to the case body with a screw, and the peripheral portion of the closing portion is attached to the case body;
An electronic apparatus comprising:   The closing portion is separate from the case main body, and is provided with an annular flange portion that is liquid-tightly attached to one end opening edge of the case main body, and is provided integrally with the flange portion toward the circuit board. The electronic device according to claim 1, further comprising a protruding portion protruding in a protruding manner.   A lighting device characterized by lighting a discharge lamp with the electronic device according to claim 1. With chassis;
A lamp socket attached to this chassis;
A discharge lamp removably supported in the socket;
The lighting device according to claim 3, wherein the lighting device is attached to the chassis to light the discharge lamp;
The lighting fixture characterized by comprising.

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