JP4697108B2 - Lighting device and lighting apparatus - Google Patents

Description

The present invention relates to a lighting device and a lighting fixture.

  Conventionally, in a discharge lamp lighting device for lighting a high-pressure discharge lamp (HID lamp) such as a high-pressure sodium or metal halide lamp, a copper-iron type ballast in which a copper wire is wound around an iron core has been used.

  The discharge lamp lighting device is often used for street lamps installed outdoors, and is exposed to high humidity in the rain, snow, rainy season, etc. It is waterproof.

  In addition, the discharge lamp lighting device is provided with a discharge lamp so that an input terminal to which an input line such as a power supply line is connected and an output terminal to which an output line such as a control signal line is connected do not leak due to dripping rain water. Both were installed side by side at the lower end side of the lighting device.

  On the other hand, in recent years, an inverter type electronic ballast (lighting device for a discharge lamp) that has an inverter circuit composed of electronic components such as semiconductor elements and performs high-frequency lighting of a high-pressure discharge lamp has been used.

  However, the inverter type electronic ballast in which the input terminal and the output terminal are arranged side by side on the same side (lower end side) easily causes high-frequency power noise output from the output terminal to be superimposed on the input terminal side. There is a problem that the control circuit and peripheral devices are likely to malfunction.

In view of this, there has been proposed a lighting device equipped with an inverter-type electronic ballast in which an input terminal and an output terminal are spaced apart from each other at both ends in the longitudinal direction of a discharge lamp lighting device to reduce noise (for example, Patent Literature 1).
JP 2002-75045 A

  However, in such a conventional inverter type electronic ballast, the input line such as the power supply line is wired so as to pass through the vicinity of the noise generating parts such as the switching circuit over the entire length in the longitudinal direction. There is a problem that noise cannot be reduced.

An object of this invention is to provide the lighting device and lighting fixture which aimed at the reduction of the noise influence to an input line.

The lighting device according to claim 1 is provided with a hollow case made of metal having both ends opened in the longitudinal direction; and a lighting circuit for lighting the lamp, and is housed in the case. An input end and an output end of the lighting circuit Are separated from each other at both ends in the longitudinal direction of the case, and the region for forming the large current circuit part of the lighting circuit and the region for forming the control circuit part are respectively divided on both sides in the short direction of the case, and output The lighting device main body, in which the output line connected to the end portion is routed to the input end portion side through the large current circuit portion side, and is wired so as to be pulled out of the case; And the large current circuit section has a heat sink arranged in parallel with a required gap inside the inner surface of the case, and an output is provided at the gap between the heat sink and the inner surface of the case. It is characterized by passing through a line .

  In the following claims, the end plates are respectively disposed on both end sides of the case so that the case is sealed or waterproof.

  The large current circuit portion is a portion through which a relatively large current flows, such as an FET (field effect transistor) or a diode, and the control circuit portion includes an IC, a resistor capacitor, a small signal transistor, and the like.

When the lighting device is an inverter-type electronic ballast, the lighting device body includes a circuit board and electronic components and circuit parts of the lighting circuit mounted on the circuit board.

The lamp may be either a high pressure discharge lamp or a low pressure discharge lamp. Also , the lighting device allows a copper-iron type ballast.

Delete

According to the invention which concerns on Claim 2 , the output line is being fixed to the heat sink with the cable holding means holding a cable, It is characterized by the above-mentioned.

According to a third aspect of the invention, there is provided the lighting device according to the first or second aspect ; a lamp that is turned on by the lighting device ; and an appliance body on which the lamp is disposed. And

  According to the first aspect of the present invention, the input end to which an input line such as a power supply line is connected and the output end to which an output line such as a control signal line is connected are respectively provided at both ends in the longitudinal direction of the case. Since they are arranged apart from each other, it is possible to prevent or reduce noise such as harmonics of the lamp power output from the output end from being superimposed on the input line connected to the input end.

  In addition, the output line connected to the output end is separated from the control circuit unit by wiring the control circuit unit so that it passes through the large current circuit unit side opposite to the short side of the case. It is possible to prevent or reduce the malfunction of the control circuit due to the high-voltage pulse flowing through the line.

Moreover, since the large current circuit unit has a heat sink, the heat dissipation of the large current circuit unit can be improved.

  In addition, since the output line is routed through the gap between the heat sink and the inner side surface of the case, for example, the output line is displaced toward the inside of the large current circuit by the heat sink and approaches or comes into contact with the high heat component. Deterioration can be prevented or reduced.

According to the invention according to claim 2 , since the output line is fixed to the heat sink by the cable holding means, for example, the output line is displaced toward the large current circuit portion inside by the heat sink and approaches or contacts the high heat component. Thus, thermal deterioration can be prevented or reduced.

According to the invention which concerns on Claim 3 , the lighting fixture which comprises the lighting device of Claim 1 or 2 can be provided.

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

1 to 3 show a first embodiment of the present invention, FIG. 1 is a schematic exploded perspective view of a lighting device , FIG. 2 is a schematic perspective view after the assembly, and FIG. 3 is a line III-III in FIG. FIG. 4 is a cross-sectional view, and FIG. 4 is a plan view showing the lighting device main body with the intermediate portion in the longitudinal direction omitted.

1 to 4, the lighting device 1 includes a case 2, a lighting device body 3, a waterproof packing 4, and an end plate 5.

  The case 2 is composed of a case main body 6 and a case lid 7 that are extruded by a conductive metal material such as aluminum (Al). The case body 6 is formed in a substantially U-shaped cross section having openings 8 and 8 at both ends, an opening 9 along the longitudinal direction at the top, and a hollow, and concave grooves 10 and 10 are formed along the longitudinal direction at the upper end surface. In addition, a plurality of heat radiation fins 11 are formed on the outer surface 6a along the longitudinal direction.

  The case lid 7 is formed in a substantially arc shape in cross section, and convex portions 12 and 12 are formed along the longitudinal direction at both end portions in the longitudinal direction and are fitted into the recessed grooves 10 and 10 of the case body 6. A plurality of internal fins 13 are formed on the inner surface 7b along the longitudinal direction. The internal fins 13 are formed in a rectangular shape so as to have a large surface area, and protrude from the inner surface 7 b of the case lid 7 into the case 2.

  When the convex portions 12 and 12 of the case lid 7 are fitted into the concave grooves 10 and 10 of the case main body 6, the case main body 6 and the case lid 7 are integrated to form a square cylindrical case 2. Is done. At this time, the space between the concave groove 10 and the convex portion 12 is formed without a gap so that rainwater and moisture do not enter the case 2 from the location of the concave groove 10 and the convex portion 12. The outer surface 6a and inner surface 6b of the case body 6 and the outer surface 7a and inner surface 7b of the case lid 7 are each subjected to an alumite (corrosion-resistant oxide film) treatment for rust prevention, and are colored black by the anodized treatment. ing. That is, the alumite 15 is formed on the inner surfaces 6b and 7b and the outer surfaces 6a and 7a of the case 2. The alumite 15 forms heat transfer means for transferring heat from the lighting device main body 3 to the case 2.

  The lighting device main body 3 includes a circuit board 16 and electronic components and circuit parts of a lighting circuit 17 for lighting a discharge lamp mounted on the circuit board 16 at high frequency. For example, field effect transistor (FET), diode, noise filter capacitor and inductor, full wave rectifier, smoothing capacitor, inrush current preventing resistor or inductor, choke ballast, DC cut capacitor, resonance capacitor, resonance It includes switching elements such as inductors, transformers, and thyristors.

  The circuit board 16 is made of, for example, a glass epoxy material or a polybutylene terephthalate (PBT) material having a rectangular shape, and is inserted into a concave groove 18 provided on the inner surface 6 b of the case body 6. Both end portions of the concave groove 18 are opened facing the openings 8 and 8 on both end sides of the case 2. The circuit board 16 is inserted into the groove 18 from either one of the openings 8 and 8 of the case 2. The lighting circuit 17 is formed of a well-known circuit for lighting a discharge lamp at high frequency. When the discharge lamp is lit, the electronic components and circuit components of the lighting circuit 17 generate heat. Due to this heat generation, the internal temperature of the case 2 rises.

  The waterproof packings 4 and 4 are formed to have a substantially outer shape with a cross section orthogonal to the longitudinal direction of the case 2, and are closely attached to the end surfaces 6 c and 7 c of the case 2 by the end plates 5 and 5 in the openings 8 and 8 of the case 2. Is done. This makes it difficult for moisture and moisture to enter the case 2. Further, both end portions of the circuit board 16 are positioned at both end portions of the concave groove 18, and the movement of the circuit board 16 is limited in the concave groove 18, so that it hardly moves or the movement range becomes small. Thus, the lighting device main body 3 is housed in the case 2.

  The end plates 5 and 5 are formed to have substantially the same size as the waterproof packings 4 and 4, and the openings 8 and 8 are closed on the end surfaces 6 c and 7 c on both ends of the case 2 via the waterproof packings 4 and 4. Are respectively arranged. That is, the case 2 is provided with a plurality of screw portions 19 facing the end surfaces 6c and 7c, and screws 20 (shown in FIG. 2) are inserted through the plurality of holes 21 formed in the end plates 5 and 5, respectively. The waterproof packings 4 and 4 pass through the screw penetration portions 22 and are screwed to the screw portions 19.

  Thereby, case 2 is formed in a waterproof type.

  One end plate 5 is formed with insertion holes 23, 23, and one waterproof packing 4 is formed with lead wire penetrating portions 24, 24. An input lead wire (not shown) connected to the input terminal of the lighting device main body 3 and connected to the output terminal of the lighting device main body 3 connected to an external power source and connected to the electrode side of the discharge lamp. The output lead wire not shown and the ground wire not shown penetrate the lead wire through portions 24 and 24 of the waterproof packing 4 and are drawn out from the insertion holes 23 and 23 of the end plate 5 to the outside.

As described above, the case main body 6 and the case lid 7 are integrated to form the case 2, the lighting device main body 3 is accommodated in the case 2, and the water discharge packing 4 and the end plate 5 are respectively provided at both ends of the case 2. By being arranged, as shown in FIG. 2, a waterproof lighting device 1 for lighting the discharge lamp is formed. In FIG. 1 and FIG. 2, a mounting bracket and the like for fixing the case 2 to a lighting fixture or a housing are omitted.

  As shown in FIG. 4, the lighting device main body 3 includes a pair of input terminals 27 a and 27 b that are input ends of the lighting circuit 17 and a pair of output terminals 28 a and 28 b that are output terminals in the longitudinal direction of the case 2. The two end portions (the right end portion and the left end portion in FIG. 4) are spaced apart from each other. An input line 27 such as a power supply line is connected to these input terminals 27a and 27b, and an output line 28 such as a control signal line is connected to the output terminals 28a and 28b.

  The lighting circuit 17 includes a plurality of FETs 14, 14,..., A high voltage transformer 29a, an electrolytic capacitor 29b, etc., and a relatively large current flows and a large amount of heat is generated, and an IC (integrated circuit) 30a and a resistor. A control circuit unit 30 including a capacitor, a small signal transistor, and the like. The large current circuit unit 29 and the control circuit unit 30 are separately arranged on both sides in the short direction in the case 2. And arranged side by side along the longitudinal direction of the case 2.

  The output line 28 extends from the output terminals 28a and 28b through the large current circuit portion 29 side in the longitudinal direction of the case 2 and from the one end on the input terminals 27a and 27b side (the right end in FIG. 4) to the outside of the case 2. It is extended.

  As shown in FIGS. 3 and 4, a heat generating component 17 c such as a switching element composed of a plurality of FETs 14 and 14 is attached to a heat radiating plate 31 made of aluminum or the like by means of mounting screws 32.

  As shown in FIG. 4, the heat radiating plate 31 is formed by an elongated flat plate extending in the longitudinal direction of the case 2 on the inside of one side surface (upper side surface in FIG. 4) of the inner surface 6 b of the case 2. As shown in FIG. 3, a required gap g is formed between the heat radiating plate 31 and the inner surface of the case 2.

  As shown in FIG. 3, the case 2 has prismatic protrusions 2a and 2b that project inward in the lateral direction on one side surface (the right inner surface in FIG. 3) 6b of the inner surface 6b. In addition, one side surface (the right side surface in FIG. 3) of the heat radiating plate 31 is brought into contact with the inner ends of the convex portions 2a and 2b. Each convex part 2a, 2b is formed over almost the entire length in the longitudinal direction of the case 2 with a required large gap 2b in the vertical direction in FIG. A shaft tip 32a of a mounting screw 32 for attaching a heat generating component 17c such as an FET 14 or a transistor to the heat radiating plate 31 protrudes from the gap 2b so that the screw shaft tip 32a and the protrusion 2a do not interfere with each other.

  Further, in FIG. 3, the heat radiating plate 31 is fixed to the case 2 by heat radiating plate fixing screws 33, 33 disposed in the case 2 with a predetermined interval in the vertical direction. Each fixing screw 33 is inserted from the outer surface 6a of the right side surface of the case 2 in FIG. 3 through the insertion holes 2c, 2c of the right side surface of the case 2 in FIG. 3 to form screw holes (female screws) 31a formed in the heat sink 31. The heat radiating plate 31 is fixed on the convex portions 2 a and 2 b of the case 2. A plurality of pairs of these upper and lower heat sink fixing screws 33 are arranged in the longitudinal direction of the case 2 with a predetermined interval.

  As shown in FIG. 3, the output line 28 is wired so as to pass through the gap g between the heat radiating plate 31 and the right inner side surface of the case 2 in the portion passing the large current circuit portion 29 side.

  Next, the operation of the first embodiment of the present invention will be described.

  When an external power supply is supplied to the input terminals 27a and 27b of the lighting device body 3 via the input line 27, the lighting circuit 17 operates and a high frequency voltage is output from the output terminals 28a and 28b. This high frequency voltage is applied between electrodes of a discharge lamp (not shown), and the discharge lamp is lit.

  When the lighting circuit 17 operates, the electronic components and circuit components constituting the lighting circuit 17 generate heat, and the heat generated by the generated heat is transferred to the gas in the case 2. In particular, the large current circuit unit 29 including a resistor, an inductor, a transformer, a thyristor, and a field effect transistor generates heat with a heat generation amount, and heat from those heat generating components is transferred to the gas, and the inner surface of the case 2 That is, the radiation is radiated to the inner surface 6 b of the case body 6 and the inner surface 7 b of the case lid 7. As the heat from the lighting circuit 17 is transferred to the gas in the case 2, the internal temperature of the case 2 increases. Further, heat generated from the heat generating component 17 c such as the FET 14 or the transistor is radiated into the case 2 through the heat radiating plate 31. Further, the heat of the heat radiating plate 31 is transferred to the case 21 via the convex portions 2a and 2b of the case 2 and the fixing screw 33, and is radiated from the outer surface of the case 2 to the outside air.

  As the internal temperature of the case 2 rises, heat is transferred from the gas in the case 2 to the alumite 15 formed on the inner surface 6 b of the case body 6 and the inner surface 7 b of the case lid 7. In addition, radiant heat from the heat generating component is transferred to the anodized aluminum 15. Here, since the alumite 15 is colored in black, it quickly absorbs heat from the gas and radiant heat from the heat-generating component.

  Further, since the inner fin 13 is formed on the inner surface 7b of the case lid 7, the inner surface area of the case 2 is larger than when the inner fin 13 is not formed. As the inner surface area increases, the endothermic area increases, and the amount of heat absorbed from the gas and the radiant heat from the heat-generating component increases. As a result, the heat from the gas and the radiant heat from the heat generating component are absorbed by the alumite 15 more rapidly.

  Thus, the internal fins 13 and 14 are formed on the inner surface 7b of the case lid 7, and the black anodized aluminum 15 is formed on the inner surface 6b of the case body 6 and the inner surface 7b of the case lid 7. The heat generated in 17 (lighting device body 3) is quickly absorbed by the alumite 15.

  The heat from the lighting circuit 17 absorbed by the alumite 15 is transferred from the alumite 15 to the case body 6 and the case lid body 7 and is radiated to the outside from the outer surface 6a of the case body 6 and the outer surface 7a of the case lid body 7. . Here, since the heat radiating fins 11 are formed on the outer surface 6a of the case main body 6, the outer surface area of the case main body 6 is larger than when the heat radiating fins 11 are not formed. The amount of heat radiated from the outer surface 6a of the case body 6 increases as the outer surface area increases, and the heat dissipation area increases. The heat from the lighting circuit 17 is quickly radiated from the case 2 by the amount of heat radiated. Further, the heat generated by the FET 14 as the heat generating component 17 c is radiated by the heat radiating plate 31.

As described above, the heat radiating fins 11 are formed on the outer surface 6a of the case 2, the inner fins 13 are formed on the inner surface 7b, and the alumite 15 colored in black is formed on the inner surfaces 6b and 7b of the case 2. Heat generated in the lighting circuit 17 of the apparatus main body 3 is quickly radiated from the case 2 to the outside. Thereby, the temperature rise in case 2 is suppressed and the temperature rise of the electronic components, circuit components, etc. which comprise the lighting circuit 17 is suppressed. As a result, thermal deterioration of the electronic component and circuit component is prevented, and the durable life of the lighting device main body 3 can be ensured. Further, the lighting device body 3 can be reduced in size, the case 2 can also be reduced in size , and the entire lighting device 1 can be reduced in size.

  In addition, it replaces with the alumite process colored black, and the same effect | action and effect will be acquired even if a black coating is given to the outer surface 6a, 7a and inner surface 6b, 7b of case 2, for example.

  Further, no heat transfer means such as black anodized 15 is formed on the outer surfaces 6a and 7a and the inner surfaces 6b and 7b of the case 2, and even if the alumite treatment or the like is only dustproof treatment, Since the heat in the case 2 is transferred to the formed internal fins 13, the internal temperature of the case 2 is reduced. That is, by forming the internal fins 13 on the inner surface 7b of the case 2, the temperature rise of the lighting device main body 3 can be reduced.

  Moreover, although the internal fin 13 is formed in the mutually different size of rectangular shape, it is not restricted to this, The same magnitude | size and shape may be sufficient, and arbitrary shapes may be sufficient.

  And since the lighting device body 3 has the input terminals 27a and 27b and the output terminals 28a and 28b of the lighting circuit 17 spaced apart from each other at both ends in the longitudinal direction of the case 2, it is output from the output terminals 28a and 28b. It is possible to prevent or reduce noise such as higher harmonics of the lamp power from being superimposed on the input line 27 connected to the input terminals 27a and 27b.

  Further, the control circuit unit 30 is wired by passing the output line 28 connected to the output terminals 28a and 28b so as to pass through the control circuit unit 30 to the large current circuit unit 29 on the opposite side of the case 2 in the short direction. Therefore, the malfunction of the control circuit due to the high-voltage pulse of the control signal flowing through the output line 28 can be prevented or reduced.

  Furthermore, since the large current circuit unit 29 includes the heat radiating plate 31, the heat dissipation of the large current circuit unit 29 can be improved.

  Further, since the output line 28 is routed through the gap g between the heat radiating plate 31 and the inner side surface of the case 2, for example, the output line 28 is displaced by the heat radiating plate 31 toward the inner side of the large current circuit portion 29. It is possible to prevent or reduce thermal deterioration due to approach or contact with the heat-generating component.

  Next, a second embodiment of the present invention will be described.

FIG. 5 is a schematic cross-sectional view of a lighting device showing a second embodiment of the present invention. The same parts as those in FIG.

The lighting device 25 shown in FIG. 5 is characterized in that in the lighting device 1 shown in FIG. 1, the inside of the case 2 is filled with a heat conductive resin 26. The heat transfer resin 26 is, for example, a silicone resin that is insulating and heat resistant and has high thermal conductivity.

  The heat generating component 17c having a large amount of self-heating such as a thyristor or a field effect transistor is mounted on a heat sink 31 made of aluminum (Al), and the heat sink 31 is in contact with the convex portion 2a of the case body 6. Since the heat radiating plate 31 is fixed to the case main body 6 by the heat radiating plate fixing screws 33, 33,..., The heat radiating plate 31 comes into contact with the inner surface 6 b of the case main body 6.

  After the lighting device body 3 is housed in the case 2 and the waterproof packing 4 and the end plate 5 are disposed on one end side of the case 2, the heat transfer resin 26 is placed in the case 2 from the opening 8 on the other end side of the case 2. Injected inside. The heat transfer resin 26 is filled in the case 2 so as to enclose the electronic components and circuit components of the lighting circuit 17 mounted on the circuit board 16.

In order to reduce the weight of the case 2 ( lighting device 25), the heat transfer resin 26 is filled inside the case lid 7 so as to leave some space inside the case lid 7. The case 2 may be filled so as to be in close contact with the entire area of the inner surface 7b of the lid 7.

Therefore, according to the lighting device 25, the heat generated in the lighting circuit 17 is transferred to the heat transfer resin 26 through the heat radiating plate 31 or directly, and is transferred inside the heat transfer resin 26. Then, heat is transferred from the heat transfer resin 26 to the anodized aluminum 15 formed on the inner surface 6b of the case main body 6 and transferred to the anodized aluminum 15 formed on the internal fins 13 of the case lid 7 so that the case main body 6 and the case Heat is transferred to the lid 7 (case 2).

  Further, the heat of the heat-generating component 17 c that has self-heated is transferred to the heat radiating plate 31, transferred from the heat radiating plate 31 to the alumite 15 formed on the inner surface 6 b of the case main body 6 and transferred to the case main body 6.

  The heat transfer resin 26 is easier to transfer heat than gas. Therefore, the heat from the lighting circuit 17 is quickly transferred to the case 2 via the heat transfer resin 26, and the amount of heat radiated from the outer surfaces 6a and 7a of the case 2 increases. Further, since the heat radiating plate 31 on which the heat generating component 17 c is mounted is in contact with the inner surface 6 b of the case main body 6, the heat of the heat generating component 17 c is quickly transferred to the case main body 6 through the heat radiating plate 31. Thereby, the temperature rise of the electronic component of the lighting circuit 17 and a circuit component is suppressed more. As a result, the durability life of the lighting device body 3 can be further improved, and the lighting device body 3 and the case 2 can be further downsized.

FIG. 6 is an axial cross-sectional view of a lighting device 25A according to a third embodiment of the present invention. The lighting device 25A is the same as the lighting device 1 according to the first embodiment shown in FIG. Therefore, the configuration other than the above is the same as that of the lighting device 25 described above , and a duplicate description is omitted.

  That is, the heat radiating plate 31 is provided with belt insertion holes 31b, 31b,... Penetrating in the thickness direction at the upper end portion in FIG. A part of the cable belt 34 in which the output lines 28 are bundled is inserted into the belt insertion holes 31b, 31b,... To fix the output lines 28 to the heat radiating plate 31.

Therefore, according to the lighting device 25A, since the output line 28 is fixed to the heat radiating plate 31 by the cable belt 34, for example, during the handling of the lighting device 25A, the output wire 28 swings and is larger than the heat radiating plate 31. It is possible to prevent or reduce thermal deterioration due to displacement toward the current circuit unit 29 and approaching or contacting the high heat component.

FIG. 7 is an axial cross-sectional view of the main part of a lighting device 25B according to the fourth embodiment of the present invention. The lighting device 25B, in the lighting device 1 according to the first embodiment shown in FIG. 3, FIG. 7 in the upper end portion 31c of the heat radiating plate 31, folded substantially at a right angle along the upper surface of the convex portion 2a adjacent thereto Bending and fixing the bent end portion 31c to the upper surface of the convex portion 2a with the fixing screw 35 eliminates the fixing screws 33, 33,... Shown in FIGS. There is a feature. Since the configuration other than this is substantially the same as that of the lighting device 1, the redundant description thereof is omitted.

Therefore, according to this lighting device 25B, each insertion hole 2c of the case 2 through which each heat sink fixing screw 33 is inserted can be deleted.

  Therefore, as shown in FIG. 5, when the heat transfer resin 26 is filled in the case 2, a small gap between the insertion holes 2c, 2c,... Of the case 2 and the fixing screws 33, 33,. Rainwater or the like can be prevented or reduced from entering the case 2 from the outer surface 6a.

FIG. 8 is an axial cross-sectional view of a main part of a lighting device 25C according to the fifth embodiment of the present invention. This lighting device 25C is the lighting device 1 according to the first embodiment shown in FIG. 3, in which the heat radiating plate 31 is directly attached to the large convex portion 2d larger than the single convex portion 2a shown in FIG. There is a feature in the point.

That is, in the lighting device 25C, the FET 14 is fixed to the heat radiating plate 31 with the flat head screws 35. A countersunk countersink 31d embedded in the countersunk head 35a of the countersunk screw 35 is formed on the back surface (right side in FIG. 8) of the heat radiating plate 31, and the shaft part of the countersunk screw 35 is inserted into the mounting portion of the FET 14. A through hole 14a is formed.

  Then, the countersunk screw 35 is inserted into the through hole 14a of the FET 14 and protrudes toward the front (left side in FIG. 8). It is fixed to the heat sink 31.

  Further, the heat radiating plate 31 has a pair of U-shaped end portions 31d and 31e integrally formed by bending both upper and lower ends in FIG.

  On the other hand, the case 2 protrudes inward from the right side surface of the inner surface 6b in FIG. 8 and has a large projecting portion 2d that protrudes substantially along the entire length in the longitudinal direction of the case 2 integrally. Yes.

  The large convex portion 2d has fitting grooves 2d1 and 2d2 in which the pair of upper and lower U-shaped end portions 31d and 31e of the heat radiating plate 31 are slidably fitted at both upper and lower ends in FIG. ing.

Therefore, according to this lighting device 25C, from the one opening end 8 side of the case 2, the heat sink 31 and the pair of U-shaped end portions 31d, 31e are connected to the pair of large convex portions 2d of the case 2. The heat radiating plate 31 can be attached to a predetermined position in the case 2 by fitting in the mating grooves 2 d 1 and 2 d 2 and sliding the heat radiating plate 31 in the axial direction of the case 2 to a predetermined position.

  Moreover, since the countersunk head 35a of the countersunk screw 35 is embedded by the countersink 31d of the heat sink 31, the back surface of the heat sink 31 can be formed flush. For this reason, the back surface of the heat sink 31 can be brought into close contact with the protruding front end surface of the large convex portion 2d. Moreover, since the large convex portion 2d is larger than the single convex portion 2a shown in FIG. 3, the area of the contact surface can be increased. For this reason, the amount of heat transferred from the heat sink 31 to the case body 6 can be increased. For this reason, since the amount of heat released from the outer surface 6a of the case 2 to the outside air can be increased, the heat dissipation can be improved.

Further, since the heatsink mounting fixing screws 33, 33,... Shown in FIG. 3 and the like can be deleted, the heatsink mounting fixing screw 33 and the insertion hole 2c are provided in the same manner as the lighting device 25B shown in FIG. It is possible to prevent or reduce rainwater from entering the case 2 from the outer surface 6a of the case 2 through the minute gap or leakage of the heat transfer resin 26 to the outside of the case 2.

FIG. 9 is an axial cross-sectional view of the main part of a lighting device 25D according to the sixth embodiment of the present invention. This lighting device 25D is the same as the lighting device 25C shown in FIG. 8 except that the large convex portion 2d shown in FIG. 37 is characterized in that the heat radiating plate 31 is attached.

That is , the lighting device 25D attaches the FET 14 or the like to the heat radiating plate 31 with the flat plate screw 35 via the mounting plate 37 and the flat plate screw 35 on the back surface of the heat radiating plate 31 in the same manner as the lighting device 25C shown in FIG. A countersink 31d for burying the countersunk head 35a is formed so that the back side of the heat radiating plate 31 is flush. Further, similarly to the heat radiating plate 31 shown in FIG. 8, the heat radiating plate 31 fastens the FET 14 to the heat radiating plate 31 by tightening a tightening nut 36 at the shaft tip portion 35 b of the countersunk screw 35.

  In addition, the large convex portion 2d is a U-shaped bent end that is elastically fitted to the fitting grooves 2d1 and 2d2 with one-touch at both upper and lower ends thereof, similarly to the large convex portion 2d shown in FIG. The portions 37a and 37b are integrally formed.

  Therefore, a plurality of mounting plates 37, 37,... Are fixed to the heat radiating plate 31 with a flat plate screw 35 at a required interval in the longitudinal direction (the front and back directions in FIG. 9). ,... Are elastically pushed and fitted into the fitting grooves 2d1 and 2d2 of the large convex portion 2d, thereby fitting the heat sink 31 into the large convex portion 2d. Can be fixed with a single touch.

Moreover, since the flat head 35a of the countersunk screw 35 is embedded by the countersink 31d of the heat sink 31 also by this lighting device 25D similarly to the said light switch 25C, the back surface of the heat sink 31 can be formed flush. For this reason, the back surface of the heat sink 31 can be brought into close contact with the protruding front end surface of the large convex portion 2d. Moreover, since the large convex portion 2d is larger than the convex portion 2a shown in FIG. 3, the area of the contact surface can be increased. For this reason, the amount of heat transferred from the heat sink 31 to the case body 6 can be increased. For this reason, since the amount of heat released from the outer surface 6a of the case 2 to the outside air can be increased, the heat dissipation can be improved.

Further, since the heatsink mounting fixing screws 33, 33,... Shown in FIG. 3 and the like can be deleted, the heatsink mounting fixing screw 33 and the insertion hole 2c are provided in the same manner as the lighting device 25B shown in FIG. It can be prevented or reduced that rainwater enters the case 2 from the outer surface 6a of the case 2 through the minute gap and the heat transfer resin 26 leaks out of the case 2 at the time of filling.

  Next, a third embodiment of the present invention will be described.

  10 and 11 show a seventh embodiment of the present invention, in which FIG. 10 is an external view of a lighting fixture attached to a stepped pole, and FIG. 11 is a partially cutaway sectional view of the lighting fixture. . In addition, about the same part as FIG. 2, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

  The lighting fixture 38 shown in FIG. 10 is a street lamp. In the street light 38, a street light body 39 as an instrument body is attached to a hollow stepped pole 41 via a joiner arm 40. The stepped pole 41 is erected on a concrete foundation 43 partially embedded in the ground 42.

The stepped pole 41 houses either the lighting device 1 or the lighting devices 25A to 25D shown in FIG. Then, a power line and a ground line (not shown) are introduced from the outside through the power hole 45 and are connected to the input line 27 and the ground line led out from the lighting device 1 in the stepped pole 41, respectively. The output line 28 of the lighting device 1 is wired to the street lamp main body 39.

As shown in FIG. 11, the street light main body 39 is formed in a substantially box shape having an opening on the lower surface, and has a socket base 46, a lamp socket 47, a high-pressure discharge lamp 48 as a discharge lamp, a reflector 49, and the like. Has been established. The lamp socket 47 is connected to the output line 28 of the lighting device 1. As the high-pressure discharge lamp 48, for example, a metal halide lamp is used.

When the external power source is turned on to the lighting device 1 via the input line 27 (power line), the metal halide lamp 48 is lit. The direct light radiated from the metal halide lamp 48 and the reflected light radiated from the reflecting plate 49 are emitted from the opening of the street lamp main body 39 to the road surface. Thus, the street lamp 38 illuminates the road surface.

When the metal halide lamp 48 is lit by the lighting device 1, heat generated in the lighting device body 3 of the lighting device 1 is radiated from the case 2 to the internal space of the stepped pole 41. Then, the heat is transferred to the stepped pole 41 and radiated from the stepped pole 41 to the atmosphere.

Since the lighting device 1 is formed in a waterproof shape, even if rainwater or moisture enters the stepped pole 41 from the gap between the opening / closing lid 45 and the stepped pole 41 or the power supply hole 45, the case 2 Moisture and moisture are prevented from entering inside.

In addition, this invention is not limited to the said embodiment, For example, also in lighting device 25A-25D which concerns on the said 3rd-6th embodiment, like 2nd Embodiment, it transmits in case 2. The thermal resin 26 may be filled.

The schematic exploded perspective view of the lighting device which shows the 1st Embodiment of this invention. Similarly , the schematic perspective view of a lighting device . III-III sectional view taken on the line of FIG. FIG. 4 is a schematic plan view of the lighting device main body shown in FIG. 3 and the like. The schematic axial cross-sectional view of the lighting device which shows the 2nd Embodiment of this invention. The schematic axial cross-sectional view of the lighting device which shows the 3rd Embodiment of this invention. The schematic axial cross-sectional view of the lighting device which shows the 4th Embodiment of this invention. The schematic axial cross-sectional view of the lighting device which shows the 5th Embodiment of this invention. The schematic axial cross-sectional view of the lighting device which shows the 6th Embodiment of this invention. The external view of the lighting fixture of the state attached to the stepped pole which shows the 7th Embodiment of this invention. Similarly, a partially cutaway sectional view of a lighting fixture.

1, 25, 25A, 25B, 25C, 25D ... lighting device , 2 ... case, 2a, 2b ... convex portion, 2c ... insertion hole, 2d ... large convex portion, 3 ... lighting device body, 5 ... end plate, 15 ... anodized as heat transfer means, 17 ... lighting circuit, 26 ... heat transfer resin, 27 ... input line, 27a, 27b ... pair of input terminals, 28 ... output line, 28a, 28b ... pair of output terminals, 29 ... large Current circuit section, 30 ... control circuit section, 31 ... heat sink, 32 ... mounting screw, 33 ... heat sink fixing screw, 34 ... cable belt, 35 ... flat head screw, 37 ... mounting plate, 38 ... street light as lighting fixture 39 ... Street lamp body as an instrument body, 41 ... Stepped pole, 48 ... Metal halide lamp as a discharge lamp.

Claims (3)

A metal hollow case open at both longitudinal ends;
A lighting circuit for lighting the lamp is housed in the case, and the input end portion and the output end portion of the lighting circuit are spaced apart from each other at both ends in the longitudinal direction of the case, and the large current circuit portion of the lighting circuit is provided. The area to be formed and the area to form the control circuit part are divided into both sides in the short direction of the case, respectively, and the output line connected to the output end part is passed through the large current circuit part side to the input end part side, A lighting device body wired so as to be pulled out of the case;
End plates that respectively close both open ends in the longitudinal direction of the case;
Comprising
The large current circuit section has a heat sink arranged in parallel with a required gap inside the inner surface of the case, and an output line is passed through the gap between the heat sink and the inner surface of the case. Lighting device . The lighting device according to claim 1 , wherein the output line is fixed to the heat radiating plate by cable holding means for holding the cable. A lighting device according to claim 1 or 2 ;
A lamp to be lit by this lighting device ;
An instrument body in which a lamp is disposed;
The lighting fixture characterized by comprising.

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