JP2008270165A - Discharge lamp lighting device and lighting apparatus using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a discharge lamp lighting device capable of securing an insulation performance without decreasing a mounting area of a printed-circuit board and increasing a cost, and a lighting apparatus using the same. <P>SOLUTION: The discharge lamp lighting apparatus is provided with a printed-circuit board 1, a first insulating sheet 2 which is made of a material with insulating performance and arranged on the rear side of the printed-circuit board 1, and a second insulating sheet 3 which is made of a material with insulating performance and arranged on the front side of the printed-circuit board 1. A third insulating sheet 4 which is made of the material with insulating performance and of which the longitudinal length is shorter than that of the longitudinal direction of the first insulating sheet 2 and is nearly equal to that of the longitudinal direction of the printed-circuit board 1 is provided between the first insulating sheet 2 and the printed-circuit board 1, and a pair of rising pieces 42 which rises along the both side edges in short-length direction of the printed-circuit board 1 are provided on the both side edges along the short-length direction of the third insulation sheet 4. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a discharge lamp lighting device and a lighting fixture using the same.

  Conventionally, a discharge lamp lighting device has been provided to light a discharge lamp such as a fluorescent lamp. Among these, in a discharge lamp lighting device generally called an inverter system, an AC voltage from an AC power source such as a commercial power source is provided. An inverter circuit is mounted which includes a DC conversion unit that converts a DC voltage into a DC voltage, and a high-frequency conversion unit that converts a DC voltage output of the DC conversion unit into high-frequency power and supplies it to a discharge lamp. The inverter circuit is configured by mounting a large number of electronic components on a printed wiring board. However, when dust or water droplets adhere to the printed wiring board, problems such as short circuit or poor conduction occur, and a discharge lamp lighting device. May break down. In order to solve this problem, a discharge lamp lighting device is known in which a printed wiring board is covered with an insulating sheet made of an insulating material.

  Hereinafter, a conventional example of the discharge lamp lighting device as described above will be described with reference to the drawings. In the following description of the conventional example, the vertical direction in FIG. As shown in FIG. 11B, this conventional example includes a substantially rectangular printed wiring board 1 on which circuit components A of an inverter circuit that supplies high-frequency power to a discharge lamp (not shown) are mounted, and an insulating property. The first insulating sheet 2 made of a material having the above and covering the printed wiring board 1 from the lower side, and the second insulating sheet 3 made of an insulating material and covering the printed wiring board 1 from the upper side.

  The printed wiring board 1 is formed into a long and substantially rectangular shape using paper phenol or the like as a material, and an output side terminal block 10 and an input side terminal block having a quick connection terminal structure in addition to the circuit component A on the upper surface thereof. 11 are mounted on both ends in the longitudinal direction. The output side terminal block 10 is connected to a discharge lamp side electric wire connected to a socket (not shown) to which the discharge lamp is detachably mounted, and the input side terminal block 11 is connected to a commercial power source (not shown). ) Is connected to the power supply side wire.

  The first insulating sheet 2 is made of a synthetic resin molded product having insulating properties, and has a substantially rectangular main plate 20 whose length in the longitudinal direction is substantially equal to the length in the longitudinal direction of the printed wiring board 1, and the longitudinal direction of the main plate 20. And a pair of leg pieces 21 extending vertically upward along both side edges along the longitudinal direction of the printed wiring board 1. In addition, the main plate 20 is provided with a pair of projecting pieces 200 formed by cutting and raising the both ends in the longitudinal direction upward so as to contact the both ends in the longitudinal direction of the printed wiring board 1, respectively. The protrusion 200 restricts the movement of the printed wiring board 1 in the longitudinal direction. The length in the vertical direction of the projecting piece 200 is such a length that does not cover the wire insertion holes provided in the output side terminal block 10 and the input side terminal block 11.

The second insulating sheet 3 is made of a synthetic resin molded product having insulating properties, and has a substantially rectangular top plate 30 whose longitudinal length is shorter than the length of the printed wiring board 1 in the longitudinal direction. It is comprised from a pair of side piece 31 extended perpendicularly | vertically toward the downward direction along the both-sides edge along the longitudinal direction of the printed wiring board 1 from the both-sides edge along a longitudinal direction. Thus, the printed wiring board 1 is covered with the first insulating sheet 2 and the second insulating sheet 3 to be protected from dust and water droplets and housed in a metal case (not shown). When it is attached to an instrument body (not shown), the case and the instrument body are electrically insulated.
JP 2001-357986 A

  However, in the above conventional example, since the protruding piece 200 is formed by cutting and raising the first insulating sheet 2, a gap is generated at a portion corresponding to both end portions along the longitudinal direction of the printed wiring board 1. There has been a problem that the insulation performance at both end portions along the longitudinal direction of the wiring board 1 cannot be sufficiently satisfied. Therefore, in order to solve this, it is conceivable that the circuit component A is not mounted on both end portions along the longitudinal direction of the printed wiring board 1. In this case, the mounting area of the printed wiring board 1 is small. There was a problem of becoming smaller. In addition, it is conceivable to fill the gap by forming the projecting piece 200 integrally with the leg piece 21, but in this case, the mold of the first insulating sheet 2 is complicated, so that it is difficult to manufacture and costs. There was a problem that increased.

  The present invention has been made in view of the above points, and uses a discharge lamp lighting device capable of ensuring insulation performance without reducing the mounting area of a printed wiring board and increasing the cost, and the same. It aims at providing a lighting fixture.

  In order to achieve the above object, a first aspect of the invention comprises a substantially rectangular printed wiring board on which circuit components constituting an inverter circuit for supplying high-frequency power to a discharge lamp are mounted, and an insulating material. A first insulating sheet disposed on the back side of the printed wiring board, and a second insulating sheet made of an insulating material and disposed on the front side of the printed wiring board, the first insulating sheet, A pair of a main plate having a substantially rectangular shape whose length in the longitudinal direction is longer than the length in the longitudinal direction of the printed wiring board and a pair of edges rising from both side edges along the longitudinal direction of the main board along both side edges along the longitudinal direction of the printed wiring board The second insulating sheet is composed of leg pieces, and the second insulating sheet has a substantially rectangular top plate whose length in the longitudinal direction is shorter than the length in the longitudinal direction of the printed wiring board, and the printed wiring board from both side edges along the longitudinal direction of the top plate. Along the longitudinal direction of It consists of a pair of side pieces that hang down along the side edges. Between the printed wiring board and the first insulating sheet, it is made of an insulating material and the length in the longitudinal direction is the length in the longitudinal direction of the printed wiring board. A third insulating sheet having a substantially rectangular bottom plate substantially equal to the first insulating sheet is provided, and the third insulating sheet is provided on both side edges along the short direction of the printed wiring board from both side edges along the short direction. A pair of rising pieces rising along the side are provided.

  According to a second aspect of the present invention, in the first aspect of the invention, a pair of projecting pieces that rise to face the rising pieces of the third insulating sheet are provided at both longitudinal ends of the main plate of the first insulating sheet. The distance between the projecting pieces is substantially the same as the length of the third insulating sheet in the longitudinal direction.

  A third aspect of the invention is characterized in that, in the first or second aspect of the invention, the printed wiring board and the third insulating sheet are each provided with a restricting means for restricting movement in the longitudinal direction of each other. .

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the first insulating sheet and the second insulating sheet are each provided with a coupling means for coupling each other. To do.

  The invention according to claim 5 is the attachment according to any one of claims 1 to 4, wherein at least one of the first insulating sheet and the third insulating sheet is attached to the fixture body of the lighting fixture. Means are provided.

  The invention of claim 6 is the invention according to any one of claims 1 to 5, wherein at least one of the first insulating sheet and the second insulating sheet is fixed to the fixture body of the lighting fixture. A fixing means is provided.

  According to a seventh aspect of the present invention, there is provided a discharge lamp according to any one of the first to sixth aspects, wherein the discharge lamp is disposed between the first insulating sheet and the instrument body and between the second insulating sheet and the instrument body. There are provided gaps in which the electric wires connected to the power supply and the electric wires connected to the power source are respectively disposed, and at least a part of the first insulating sheet, the second insulating sheet, and the third insulating sheet is provided between the gaps. It is characterized by interposing.

  The invention according to claim 8 is the invention according to any one of claims 1 to 7, wherein the first insulating sheet is recessed on the side facing the instrument body and connected to the discharge lamp between the instrument body. A plurality of recesses are provided to form a plurality of gaps in which the electric wires and the electric wires connected to the power source are respectively disposed, and the first insulating sheet, the second insulating sheet, and the third insulating sheet are provided between the gaps. It is characterized by interposing at least a part of them.

  The invention according to claim 9 is the invention according to any one of claims 1 to 8, wherein at least one of the first insulating sheet and the third insulating sheet includes the first insulating sheet and the third insulating sheet. A plurality of protrusions for providing a gap between the sheet and the sheet are provided.

  The invention according to claim 10 is the invention according to any one of claims 1 to 9, wherein at least one of the first insulating sheet and the third insulating sheet includes the first insulating sheet and the third insulating sheet. A plurality of protrusions are provided to divide the space between the sheet and form a plurality of gaps in which the electric wires connected to the discharge lamp and the electric wires connected to the power source are respectively disposed, At least a part of one insulating sheet, the second insulating sheet, and the third insulating sheet is interposed.

  The invention of claim 11 is the invention according to any one of claims 1 to 10, wherein the printed wiring board is connected to a discharge lamp or a terminal block to which an electric wire connected to a power source is connected at both longitudinal ends of the printed wiring board. The rising piece is integrally formed with an auxiliary piece that fills at least a portion excluding the terminal block.

  The invention of claim 12 is an appliance main body, a socket attached to the appliance main body to which the discharge lamp is detachably attached, and electric power is supplied to the discharge lamp via the socket. And a discharge lamp lighting device as described above.

  According to the invention of claim 1, the third insulating sheet having a length in the longitudinal direction shorter than the longitudinal direction of the first insulating sheet and substantially equal to the length in the longitudinal direction of the printed wiring board is defined as the first insulating sheet. Provided between the printed wiring board and a pair of rising pieces that rise along both side edges along the short direction of the printed wiring board on both side edges along the short direction of the third insulating sheet, Since the gap between the rising piece and the leg piece of the first insulating sheet is located inside both ends in the longitudinal direction of the leg piece, both end portions along the longitudinal direction of the printed wiring board are close to the outside. Therefore, it is possible to ensure the insulation performance at the both end portions of the printed wiring board. In addition, since the circuit components can be mounted on both side ends of the printed wiring board, the mounting area is not reduced, and further, the insulation corresponding to the portions corresponding to the both ends of the printed wiring board is filled. Since there is no need to manufacture a sheet mold, the cost can be prevented from increasing.

  According to invention of Claim 2, since a 3rd insulating sheet is arrange | positioned between a pair of protrusion provided in the 1st insulating sheet, it restrict | limits the movement in the longitudinal direction of a 3rd insulating sheet. Can do.

  According to invention of Claim 3, the movement to the longitudinal direction of a printed wiring board and a 3rd insulating sheet can be restrict | limited.

  According to invention of Claim 4, a 1st insulating sheet and a 2nd insulating sheet can be mutually fixed.

  According to invention of Claim 5, at least any one of a 1st insulating sheet and a 3rd insulating sheet and the fixture main body of a lighting fixture can be mutually fixed.

  According to invention of Claim 6, at least any one of a 1st insulating sheet and a 2nd insulating sheet and the fixture main body of a lighting fixture can be mutually fixed.

  According to invention of Claim 7, it is connected to the electric wire and power supply which are connected to a discharge lamp in the clearance gap provided between the 1st insulating sheet and the instrument main body, and between the 2nd insulating sheet and the instrument main body. Since the insulation between the wires can be improved by interposing at least a part of any insulation sheet between the gaps, high-frequency noise is connected to the power supply. Therefore, it is difficult to superimpose on the electric wire, and the noise terminal voltage returning to the power source can be reduced.

  According to the invention of claim 8, the electric wire connected to the discharge lamp and the electric wire connected to the power source can be separated and wired in a plurality of gaps formed between the recess and the instrument body, By interposing at least a part of one of the insulating sheets between the gaps, the insulation between the wires can be improved, so that high-frequency noise is difficult to be superimposed on the wires connected to the power source, and noise that returns to the power source The terminal voltage can be reduced.

  According to the invention of claim 9, by providing a gap between the first insulating sheet and the third insulating sheet by the protrusion, mechanical stress is applied to the electric wire when the electric wire is wired between the two insulating sheets. Wiring can be performed without giving

  According to the invention of claim 10, the electric wire connected to the discharge lamp and the electric wire connected to the power source are separated into a plurality of gaps formed between the first insulating sheet and the third insulating sheet. Wiring can be performed, and insulation between the wires can be enhanced by interposing at least a part of any insulating sheet between the gaps, so that high-frequency noise is difficult to be superimposed on the wires connected to the power source. Thus, the noise terminal voltage fed back to the power supply can be reduced.

  According to the eleventh aspect of the present invention, since the auxiliary piece that fills at least a portion excluding the terminal block is integrally formed on the rising piece, the finger or the hand from the gap generated between the terminal block and the first insulating sheet is formed. Foreign matter can be prevented from entering the space in which the printed wiring board is arranged.

  According to the twelfth aspect of the present invention, it is possible to realize a lighting fixture that exhibits the effect of any one of the first to eighth aspects.

(Embodiment 1)
Hereinafter, the discharge lamp lighting device of Embodiment 1 of this invention is demonstrated using drawing. However, since the basic configuration of this embodiment is the same as that of the conventional example, common portions are denoted by the same reference numerals and description thereof is omitted. In the following description, the vertical direction in FIG. 2 is defined as the vertical direction. In the present embodiment, as shown in FIG. 2, a substantially rectangular printed wiring board 1 on which circuit components A of an inverter circuit for supplying high-frequency power to a discharge lamp (not shown) are mounted, and an insulating material The first insulating sheet 2 that covers the printed wiring board 1 from the lower side, the second insulating sheet 3 that consists of an insulating material and covers the printed wiring board 1 from the upper side, and the printed material that consists of the insulating material It consists of a third insulating sheet 4 interposed between the wiring board 1 and the first insulating sheet 2.

  The third insulating sheet 4 is made of a synthetic resin molded product having insulating properties, and the length in the longitudinal direction is substantially equal to the length L2 in the longitudinal direction of the printed wiring board 1 as shown in FIG. And it is comprised from the substantially rectangular bottom plate 40 formed shorter than the length L1 of the main plate 20 of the 1st insulating sheet 2 in the longitudinal direction. The length of the bottom plate 40 in the short direction is substantially equal to the length t2 of the printed wiring board 1 in the short direction and shorter than the length t1 of the main plate 20 of the first insulating sheet 2 in the short direction. Has been.

  At both ends in the longitudinal direction of the bottom plate 40, as shown in FIG. 1 (a), a substantially rectangular upright piece 42a, which rises along one side edge along the short direction of the printed wiring board 1, and Each of the rising pieces 42 includes a substantially rectangular folded piece 42b formed by bending the upper end of the standing piece 42a outward. Thus, both side edges along the short direction of the printed wiring board 1 are covered by the upright pieces 42a of the third insulating sheet 4, and both side edges along the longitudinal direction of the printed wiring board 1 are The insulating sheet 2 is covered with the leg piece 21.

  Here, a gap is generated between the standing piece 42a and the leg piece 21, that is, on both end portions along the longitudinal direction of the printed wiring board 1. As shown in FIG. Since the insulating sheet 2 is disposed on the inner side of the both ends in the longitudinal direction, an insulation distance from the outside can be obtained, and therefore, insulation performance at both end portions along the longitudinal direction of the printed wiring board 1 can be ensured. Can do. For this reason, since it becomes possible to mount the circuit component A also at the both end portions along the longitudinal direction of the printed wiring board 1, it is possible to prevent the mounting area from being reduced. Moreover, compared with the case where the 1st insulating sheet 2 which fills said clearance gap is manufactured, the increase in cost can be prevented.

  The end of the third insulating sheet 4 on the side where the input side terminal block 11 is provided is filled with a gap between the input side terminal block 11 and the leg piece 21 as shown in FIG. The auxiliary piece 42c is formed integrally with the standing piece 42a. Thus, it is possible to prevent a finger or a foreign object from entering the space where the printed wiring board 1 is disposed from the gap between the input side terminal block 11 and the leg piece 21.

  In addition, a pair of fitting pieces (not shown) projecting downward are provided at both ends in the longitudinal direction of the bottom plate 40 of the third insulating sheet 4 and are opposed to the fitting pieces in the printed wiring board 1. By providing a fitting hole (not shown) in which the fitting piece is fitted in the part, the printed wiring board 1 is restricted from moving in the longitudinal direction or the short direction on the third insulating sheet 4. It doesn't matter. Further, a pair of fitting protrusions (not shown) may be formed by embossing at both longitudinal ends of the bottom plate 40, and the fitting protrusions may be used as substitutes for the fitting pieces.

(Embodiment 2)
Hereinafter, the discharge lamp lighting device of Embodiment 2 of this invention is demonstrated using drawing. However, since the basic configuration of the present embodiment is common to that of the first embodiment, common portions are denoted by the same reference numerals and description thereof is omitted. In the present embodiment, as shown in FIGS. 4A and 4B, the third insulating sheet 4 is extended along both side edges along the longitudinal direction of the printed wiring board 1 from both side edges along the longitudinal direction thereof. A pair of long side pieces 41 are provided. Thus, the long side piece 41 covers both side edges along the longitudinal direction of the printed wiring board 1 instead of the leg piece 21 of the first insulating sheet 2, so that the leg piece 21 can be freely provided with cuts or the like. Is possible.

  For this reason, in the present embodiment, a substantially rectangular locking hole 23 is provided in a substantially central portion in the longitudinal direction of each leg piece 21 of the first insulating sheet 2, and the second insulating sheet 3. A substantially arrow-shaped locking piece 32 that is inserted and locked into the locking hole 23 is provided at a substantially central portion in the longitudinal direction of each side piece 31. Thus, by inserting and locking the locking pieces 32 in the locking holes 23, the first insulating sheet 2 and the second insulating sheet 3 can be fixed to each other.

(Embodiment 3)
Hereinafter, Embodiment 3 of the present invention will be described with reference to the drawings. However, since the basic configuration of the present embodiment is common to that of the first embodiment, common portions are denoted by the same reference numerals and description thereof is omitted. In the present embodiment, as shown in FIG. 5, a pair of projecting pieces 22 rising at opposite ends in the longitudinal direction of the main plate 20 of the first insulating sheet 2 so as to face the standing pieces 42 a of the third insulating sheet 4. The distance between the projecting pieces 22 is substantially the same as the length of the third insulating sheet 4 in the longitudinal direction.

  Thus, the movement of the third insulating sheet 4 in the longitudinal direction can be limited by sandwiching the third insulating sheet 4 between the pair of projecting pieces 22. In the present embodiment, the protruding piece 22 is raised along a direction orthogonal to the leg piece 21, but may be raised along a direction parallel to the leg piece 21. Also, a pair of protrusions (not shown) may be formed by embossing at both longitudinal ends of the main plate 20, and these protrusions may be used in place of the protrusions 22.

(Embodiment 4)
Embodiment 4 of the present invention will be described below with reference to the drawings. However, since the basic configuration of the present embodiment is common to that of the first embodiment, common portions are denoted by the same reference numerals and description thereof is omitted. In the present embodiment, as shown in FIG. 6, a plurality of (three in the drawing) first protrusions 24 are provided on the main plate 20 of the first insulating sheet 2 in the longitudinal direction, and a third insulation is provided. A plurality (two in the drawing) of second protrusions 43 are provided on the bottom plate 40 of the sheet 4 in the longitudinal direction.

  The first protrusion 24 and the second protrusion 43 are both formed into a substantially circular cross section by embossing, the first protrusion 24 protrudes upward, and the second protrusion 43 is It protrudes downward.

  Thus, a gap is formed between the first insulating sheet 2 and the third insulating sheet 4 by the first protrusion 24 and the second protrusion 43, so that an electric wire is provided between the insulating sheets 2 and 4. When wiring the wire, it is possible to wire the wire without applying mechanical stress by passing the wire through the gap. In the present embodiment, since the pair of second protrusions 43 are disposed so as to contact the first protrusions 24 provided at both ends in the longitudinal direction on the inner side, the third insulating sheet 4 The movement in the longitudinal direction can be restricted.

(Embodiment 5)
Hereinafter, the lighting fixture of Embodiment 5 of this invention is demonstrated using drawing. In this embodiment, as shown in FIG. 7A, the appliance main body 5, a pair of sockets 7 accommodated in the appliance main body 5 and detachably mounted with the discharge lamp 6, and the discharge lamp via the socket 7 6 is provided with the discharge lamp lighting device B according to any one of the embodiments described above. Although not shown in FIG. 7A, in this embodiment, a cover that covers the opening of the instrument body 5 is provided, and the discharge lamp 6 and the discharge lamp lighting device B are accommodated in the instrument body 5. In this state, the present embodiment is completed by attaching the cover to the instrument body 5.

  The instrument body 5 is a metal case that is formed in a substantially rectangular parallelepiped shape with an upper surface opened, and the inner space thereof is a pair of sockets by a partition wall 51 along the longitudinal direction passing through the approximate center in the short direction. 7 and the first storage part 5a in which the discharge lamp 6 is stored, and the second storage part 5b in which the discharge lamp lighting device B is stored.

  As shown in FIG. 7B, a pair of substantially arrow-shaped fixing pieces 50 are erected upward from the bottom surface of the second storage portion 5b. Further, in the discharge lamp lighting device B, a pair of insertion holes 25 for allowing the fixing pieces 50 to pass through the main plate 20 of the first insulating sheet 2 are provided, and the bottom plate 40 of the third insulating sheet 4 is provided. A pair of depressions 44 into which the upper ends of the fixed pieces 50 are respectively inserted are provided. Thus, the discharge lamp lighting device B can be attached and fixed to the instrument body 5 by inserting the fixing piece 50 through the insertion hole 25 and inserting the upper end portion of the fixing piece 50 into the recess 44.

  The present embodiment configured as described above is provided, for example, on a display shelf (not shown) provided with a plurality of shelf boards (not shown) that are provided at predetermined intervals in the vertical direction and on which products are displayed. It is used, and it is suitable for the use of the lighting equipment for under the shelf which irradiates light to the goods displayed on the shelf below the shelf by attaching to the lower surface of the shelf. In addition, it cannot be overemphasized that this embodiment may be used for uses other than said lighting equipment for shelves.

  By the way, in general, in the case of a discharge lamp lighting device for lighting a discharge lamp at a high frequency, a high frequency current flows through the electric wire on the discharge lamp side connected to the discharge lamp through a socket. If the power supply side electric wires connected to the power supply are wired close to each other, high frequency noise is superimposed on the power supply side electric wires, which may increase the noise terminal voltage returning to the commercial power supply. In particular, in thin lighting fixtures and under-shelf lighting fixtures such as Embodiment 5 described above, the space for wiring the wires is extremely small due to the structure of the fixtures, and the electric wires on the discharge lamp side and the electric wires on the power source side are close or in close contact. There was a problem that there was a high possibility of being wired. An embodiment that can solve the above problem will be described below.

(Embodiment 6)
Hereinafter, the lighting fixture of Embodiment 6 of this invention is demonstrated using drawing. However, since the basic configuration of the present embodiment is common to that of the fifth embodiment, common portions are denoted by the same reference numerals and description thereof is omitted. Moreover, in the following description, the instrument main body 5 shows a completed state with the above-described cover attached. In the present embodiment, as shown in FIG. 8, the main plate 20 of the first insulating sheet 2 is provided with a plurality of (two in the drawing) third protrusions 26 across the short direction, and the second A plurality of (two in the drawing) fourth protrusions 33 are provided on the top plate 30 of the insulating sheet 3 in the lateral direction.

  Both the third protrusion 26 and the fourth protrusion 33 are formed in a substantially semicircular cross section by embossing, and the third protrusion 26 protrudes downward, and the fourth protrusion 33. Projecting upward.

  Thus, the third protrusion 26 and the fourth protrusion 33 provide gaps between the first insulating sheet 2 and the instrument body 5 and between the second insulating sheet 3 and the instrument body 5, respectively. The electric wire 8a on the discharge lamp 6 side connected to the discharge lamp 6 through the socket 7 is passed through one gap, and the power supply side connected to a commercial power source (not shown) is connected to the other gap. Each electric wire can be separated and wired by passing the electric wire 8b.

  Here, since the 1st insulating sheet 2, the 2nd insulating sheet 3, and the 3rd insulating sheet 4 interpose between each clearance gap, the insulation between the electric wires 8a and 8b can be improved. Therefore, it is difficult for the high frequency voltage to be superimposed on the electric wire 8b on the power source side, and the noise terminal voltage returning to the commercial power source can be reduced. Moreover, it can wire without giving mechanical stress to each electric wire 8a, 8b by letting each electric wire 8a, 8b pass to a clearance gap. Furthermore, in this embodiment, since the 3rd protrusion 26 and the 4th protrusion 33 each have a structure which presses down the instrument main body 5 toward the outer side from the inner side, the discharge lamp lighting device B is used for the instrument main body 5 It can be attached and fixed to.

  In the present embodiment, the third protrusion 26 and the fourth protrusion 33 are formed in a substantially semicircular cross section, but other shapes may be used as long as the gap can be formed. .

(Embodiment 7)
Hereinafter, the lighting fixture of Embodiment 7 of this invention is demonstrated using drawing. However, since the basic configuration of the present embodiment is common to that of the fifth embodiment, common portions are denoted by the same reference numerals and description thereof is omitted. Moreover, in the following description, the instrument main body 5 shows a completed state with the above-described cover attached. In the present embodiment, as shown in FIG. 9, concave portions 27 having a substantially rectangular cross section are provided along the longitudinal direction at both ends in the short direction of the main plate 20 of the first insulating sheet 2.

  Thus, since two gaps are formed between the two recesses 27 and the appliance main body 5, the electric wire 8a on the discharge lamp 6 side is passed through one gap, and the electric wire 8b on the power source side is passed through the other gap. By passing it, each electric wire can be separated and wired.

  Here, since the main plate 20 of the first insulating sheet 2 is interposed between the gaps, the insulation between the electric wires 8a and 8b can be enhanced. Therefore, it is difficult for the high frequency voltage to be superimposed on the electric wire 8b on the power source side, and the noise terminal voltage returning to the commercial power source can be reduced. Moreover, it can wire without giving mechanical stress to each electric wire 8a, 8b by letting each electric wire 8a, 8b pass to a clearance gap. Furthermore, in this embodiment, since the 1st insulating sheet 2 and the 3rd insulating sheet 4 are interposing between each electric wire 8a, 8b and the printed wiring board 1, it mounted in the printed wiring board 1 temporarily. Even when the lead wire 9 protruding downward from the circuit component A breaks through the third insulating sheet 4, the lead wire 9 does not directly touch the electric wires 8a and 8b, and a ground fault can be prevented.

  In the present embodiment, the concave portion 27 is formed in a substantially rectangular cross section. However, any other shape may be used as long as the gap can be formed.

(Embodiment 8)
Hereinafter, the lighting fixture of Embodiment 8 of this invention is demonstrated using drawing. However, the basic configuration excluding the discharge lamp lighting device B of this embodiment is the same as that of the fifth embodiment, and the basic configuration of the discharge lamp lighting device B is the same as that of the fourth embodiment. Are given the same numbers and their explanation is omitted. Moreover, in the following description, the instrument main body 5 shows the thing of the completion state to which the above-mentioned cover was attached. In this embodiment, the arrangement of the first protrusions 24 and the second protrusions 43 in the fourth embodiment is changed. As shown in FIG. 10, the main plate 20 of the first insulating sheet 2 is A plurality (two in the drawing) of first protrusions 24 are provided in the short direction, and a second protrusion 43 is provided at the approximate center of the bottom plate 40 of the third insulating sheet 4 in the short direction. Yes.

  Thus, gaps are formed between the first protrusion 24 and the second protrusion 43, and between the other first protrusion 24 and the second protrusion 43, respectively. Each electric wire can be separated and wired by passing the electric wire 8a on the discharge lamp 6 side through one gap and passing the electric wire 8b on the power source side through the other gap.

  Here, since the 2nd protrusion 43 of the 3rd insulating sheet 4 interposes between each clearance gap, the insulation between the electric wires 8a and 8b can be improved. Therefore, it is difficult for the high frequency voltage to be superimposed on the electric wire 8b on the power source side, and the noise terminal voltage returning to the commercial power source can be reduced. Moreover, it can wire without giving mechanical stress to each electric wire 8a, 8b by letting each electric wire 8a, 8b pass to a clearance gap.

  In addition, as for the 1st protrusion 24 and the 2nd protrusion 43, as the space | interval in the longitudinal direction of the main plate 20 and the bottom plate 40 is narrow, the electric wires 8a, This is desirable because the effect of separating 8b is increased. Moreover, in this embodiment, although the 1st protrusion 24 and the 2nd protrusion 43 are formed in cross-sectional substantially semicircle shape, as long as the said clearance gap can be formed, it may be another shape. .

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the discharge lamp lighting device of Embodiment 1 of this invention, (a) It is a perspective view of the edge part in which the output side terminal block was provided, (b) is a printed wiring board, a 1st insulating sheet, and 3rd. It is a top view of the insulating sheet. It is an exploded perspective view same as the above. It is a perspective view which shows the edge part in which the input side terminal block same as the above was provided. It is a figure which shows the discharge lamp lighting device of Embodiment 2 of this invention, (a) is a side view, (b) is sectional drawing. It is a front view which shows the discharge lamp lighting device of Embodiment 3 of this invention. It is sectional drawing which shows the discharge lamp lighting device of Embodiment 4 of this invention. It is a figure which shows the lighting fixture of Embodiment 5 of this invention, (a) is a whole schematic diagram, (b) is sectional drawing. It is sectional drawing which shows the lighting fixture of Embodiment 6 of this invention. It is sectional drawing which shows the lighting fixture of Embodiment 7 of this invention. It is sectional drawing which shows the lighting fixture of Embodiment 8 of this invention. It is a figure which shows the conventional discharge lamp lighting device, (a) is a front view, (b) is a disassembled perspective view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Printed wiring board 2 1st insulation sheet 20 Main board 21 Leg piece 3 2nd insulation sheet 30 Top plate 31 Side piece 4 3rd insulation sheet 40 Bottom plate 41 Long side piece 42 Standing piece A Circuit component

Claims (12)

  A substantially rectangular printed wiring board on which circuit components constituting an inverter circuit for supplying high-frequency power to a discharge lamp are mounted, and a first insulating sheet made of an insulating material and disposed on the back side of the printed wiring board And a second insulating sheet made of an insulating material and disposed on the front side of the printed wiring board, the first insulating sheet has a length in the longitudinal direction that is longer than the length in the longitudinal direction of the printed wiring board A long, substantially rectangular main plate and a pair of leg pieces rising from both side edges along the longitudinal direction of the main board along both side edges along the longitudinal direction of the printed wiring board. A pair of a substantially rectangular top plate whose length is shorter than the length in the longitudinal direction of the printed wiring board and a pair of both sides hanging along the both side edges along the longitudinal direction of the printed wiring board from the both side edges along the longitudinal direction of the top board It consists of side pieces and A third insulation having a substantially rectangular bottom plate made of an insulating material and having a length in the longitudinal direction substantially equal to the length in the longitudinal direction of the printed wiring board is provided between the printed wiring board and the first insulating sheet. A sheet is provided, and the third insulating sheet is provided with a pair of rising pieces that rise from both side edges along the short side direction along both side edges along the short side direction of the printed wiring board. A discharge lamp lighting device.   A pair of projecting pieces that rise up to oppose the rising piece of the third insulating sheet are provided at both ends in the longitudinal direction of the main plate of the first insulating sheet, and the distance between the projecting pieces is determined by the third insulation. 2. The discharge lamp lighting device according to claim 1, wherein the length of the sheet is substantially the same as the length in the longitudinal direction of the sheet.   3. The discharge lamp lighting device according to claim 1, wherein the printed wiring board and the third insulating sheet are provided with limiting means for limiting movement in the longitudinal direction of each other. 4.   The discharge lamp lighting device according to any one of claims 1 to 3, wherein the first insulating sheet and the second insulating sheet are provided with coupling means for coupling each other.   The attachment means for attaching to the fixture main body of a lighting fixture was provided in at least any one of said 1st insulating sheet and 3rd insulating sheet, The any one of Claim 1 thru | or 4 characterized by the above-mentioned. The discharge lamp lighting device according to 1.   The fixing means for fixing to the fixture main body of a lighting fixture was provided in at least any one of said 1st insulating sheet and 2nd insulating sheet, The any one of Claim 1 thru | or 5 characterized by the above-mentioned. The discharge lamp lighting device according to item.   Between the first insulating sheet and the instrument main body, and between the second insulating sheet and the instrument main body, there are gaps in which electric wires connected to the discharge lamp and electric wires connected to the power source are respectively disposed. 7. The device according to claim 1, wherein at least a part of the first insulating sheet, the second insulating sheet, and the third insulating sheet is interposed between the gaps. The discharge lamp lighting device described.   The first insulating sheet is recessed on the side facing the instrument main body, and forms a plurality of gaps in which the electric wire connected to the discharge lamp and the electric wire connected to the power source are respectively disposed between the first insulating sheet and the instrument main body. A plurality of recesses are provided, and at least a part of the first insulating sheet, the second insulating sheet, and the third insulating sheet is interposed between the gaps. The discharge lamp lighting device according to claim 1.   At least one of the first insulating sheet and the third insulating sheet is provided with a plurality of protrusions for providing a gap between the first insulating sheet and the third insulating sheet. The discharge lamp lighting device according to any one of claims 1 to 8, characterized in that:   At least one of the first insulating sheet and the third insulating sheet includes an electric wire and a power source that divides a space between the first insulating sheet and the third insulating sheet and is connected to a discharge lamp. A plurality of protrusions forming a plurality of gaps in which the electric wires to be connected are respectively provided are provided, and at least one of the first insulating sheet, the second insulating sheet, and the third insulating sheet is provided between the gaps. The discharge lamp lighting device according to any one of claims 1 to 9, wherein a portion is interposed.   The printed wiring board includes a terminal block to which an electric wire connected to a discharge lamp or a power source is connected to at least one of both ends in the longitudinal direction of the printed wiring board. The discharge lamp lighting device according to any one of claims 1 to 10, wherein an auxiliary piece for filling the portion is integrally formed. The discharge lamp lighting device according to any one of claims 1 to 11, wherein the appliance main body, a socket attached to the appliance main body and a discharge lamp is detachably attached thereto, and electric power is supplied to the discharge lamp via the socket. A lighting fixture characterized by comprising:

Images