JP2007213968A - Fluorescent lamp lighting fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fluorescent lamp lighting fixture in which arrangement location of a fluorescent lamp electronic ballast to the fixture body is not constrained and fluorescent lamp light is not unnecessarily shielded to reduce radiation noises. <P>SOLUTION: A plurality of conductive members 6 which contact the outer circumference (tube wall) of a lamp 4 at one end side and is conducted with the fixture body 1 at the other end side are arranged at equal intervals along longitudinal direction of the fixture body 1 on the inclined face on both sides of a reflector 3. The lamp 4 and the reflector 3 and the fixture body 1 are made capacity coupling by a stray capacity generated between the tube wall of the lamp 4 and the reflector 3 or the fixture body 1 and a close loop is formed, and since a high frequency current output from the ballast 5 flows to the closed loop, leak electric wave (radiation noise) is emitted. However, the closed loop is eliminated by the conductive member 6, thereby the radiation noise can be reduced. Furthermore, the arrangement location of the ballast 5 to the fixture body 1 is not constrained as in the case of conventional example and the light of the lamp 4 is not shielded unnecessarily. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a fluorescent lamp luminaire, and more particularly to a fluorescent lamp luminaire for lighting a straight fluorescent lamp with a fluorescent lamp electronic ballast.

  In recent years, instead of copper-iron ballasts, there has been a fluorescent lamp luminaire equipped with a fluorescent lamp electronic ballast that turns on a fluorescent lamp by converting from a commercial frequency (50 Hz or 60 Hz) to a high frequency (for example, 50 kHz) by an inverter circuit. It is popular. In such a fluorescent lamp luminaire, it is necessary to take measures so that noise (high-frequency noise) generated from the fluorescent lamp electronic ballast does not adversely affect other devices.

For example, there has been proposed a fluorescent lamp luminaire that takes measures against radiation noise radiated from wiring connecting a fluorescent lamp electronic ballast (hereinafter referred to as a ballast) and a lamp socket (see Patent Document 1). This conventional example includes a ballast in which a printed wiring board on which an inverter circuit is mounted is housed in a metal case, and the potential fluctuation side output terminal of the inverter circuit is disposed close to one lamp socket and the potential stabilization side By arranging the output terminal closer to the other lamp socket, the wiring length between the potential fluctuation side output terminal and the lamp socket is shortened and the distance from the wiring between the potential stabilization side output terminal and the lamp socket is increased. Radiation noise is reduced by suppressing the influence of electromagnetic waves radiated from the wiring between the potential fluctuation side output terminal and the lamp socket on the wiring between the potential stabilization side output terminal and the lamp socket. In addition to this, a metal louver provided on the opening surface side of the instrument body to reduce radiation noise has been proposed.
JP 2000-138209 A

  However, in the conventional example described in Patent Document 1, it is necessary to place the ballast toward one side with respect to the instrument body, and the weight balance of the instrument body is extremely biased toward one end side, so it is portable. It was difficult to do. Further, when a metal member such as a louver is arranged in front of the fluorescent lamp, the light from the fluorescent lamp is blocked by the metal member.

  The present invention has been made in view of the above circumstances, and its object is to reduce the radiation noise without unnecessarily blocking the light of the fluorescent lamp without restricting the arrangement of the fluorescent lamp electronic ballast with respect to the instrument body. An object of the present invention is to provide a fluorescent lamp luminaire that can perform the above-mentioned.

  In order to achieve the above object, the invention of claim 1 is characterized in that at least a pair of lamp sockets in which straight tube fluorescent lamps are detachably mounted, and lamp sockets each made of a metal material at both longitudinal ends. Is mounted on the fixture body so as to cover the fluorescent lamp electronic ballast, and the fluorescent lamp electronic ballast that is attached to the fixture body and lights the fluorescent lamp through the lamp socket. A reflecting plate is provided, and one or more conductive members that are in contact with the outer peripheral surface of the fluorescent lamp on one end side and are electrically connected to the instrument main body on the other end side.

  The invention of claim 2 is characterized in that, in the invention of claim 1, the conductive member is arranged closer to the lamp socket on the low voltage side with respect to the center in the longitudinal direction of the instrument body.

  According to a third aspect of the present invention, in the second aspect of the invention, an insulating material made of an insulating material that supports a fluorescent lamp that is provided near the lamp socket on the high voltage side with respect to the center in the longitudinal direction of the instrument body and is mounted on the lamp socket. A support member is provided, and the conductive member has a support portion that supports the fluorescent lamp mounted in the lamp socket.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the reflector is provided with a hole through which the conductive member is inserted.

  ADVANTAGE OF THE INVENTION According to this invention, radiation noise can be reduced by eliminating the capacitive coupling by the stray capacitance with the tube wall of a fluorescent lamp, a reflecting plate, and an instrument main body by an electroconductive member.

  Hereinafter, an embodiment in which the present invention is applied to a ceiling-mounted facility lighting apparatus will be described in detail with reference to FIGS.

  In the present embodiment, an instrument main body 1 (see FIG. 4) that is formed in a substantially U-shaped cross-section with an open lower surface side and attached to a ceiling, and a pair of sockets provided at both ends in the longitudinal direction of the instrument main body 1, respectively. (Lamp socket) 2, a reflecting plate 3 having a substantially V-shaped cross section that is attached to the instrument body 1 so as to cover the opened lower surface side, and the instrument body 1 are held between the sockets 2 so that the longitudinal direction coincides with each other. And two straight tube lamps (fluorescent lamps) 4. The present embodiment is a so-called Fuji-type fluorescent lamp lighting fixture.

  The instrument body 1 is formed by bending a metal plate, and a pair of insertion holes 1b through which mounting bolts 82 provided on the ceiling are inserted are perforated as shown in FIG. That is, when attaching the instrument main body 1 to the ceiling, the nut 84 may be tightened with the washer 83 interposed between the attachment bolts 82 inserted into the insertion holes 1b. In addition, the instrument body 1 has a power supply hole 1a for pulling in a power supply line 81 connected to an AC power supply made of a commercial power supply and wired in advance on the back of the ceiling at a substantially central position in the longitudinal direction. A terminal block 7 and a ballast (fluorescent lamp electronic ballast) 5 are disposed so as to sandwich the power supply hole 1a. Here, the power line 81 drawn through the wire hole 1 a is connected to the terminal block 7. The ballast 5 has a printed wiring board (not shown) on which an inverter circuit or the like that converts from a commercial frequency to a high frequency by switching one or more switching elements is housed in a metal case 5a. Although it is configured, details and details are well known in the art, and illustration and description thereof are omitted.

  In addition, the fixture body 1 is provided with a fixture 18 for attaching the reflector 3, while the reflector 3 is provided with a latch 32 that is attached to each fixture 18.

  The reflection plate 3 is formed by bending a metal plate, and socket insertion holes 31 through which the socket 2 is inserted are provided at both ends in the longitudinal direction. The two lamps 4 are arranged so as to be parallel to each other so as to sandwich the top of the reflector 3 having a substantially V-shaped cross section.

  Here, in the present embodiment, a plurality of (three in the illustrated example) conductive members 6 that are in contact with the outer peripheral surface (tube wall) of the lamp 4 on one end side and are electrically connected to the instrument main body 1 on the other end side are the reflecting plates. 3 are arranged at substantially equal intervals along the longitudinal direction of the instrument body 1 on the inclined surfaces on both sides. The conductive member 6 is made of a thin metal plate (for example, an aluminum plate) that is a good conductor of electricity, and the tube wall of the lamp 4 is attached to the tip portion exposed to the outside through the insertion hole 33 provided in the reflection plate 3. A semi-annular support piece 61 to be gripped is formed. In addition, a contact piece 62 is formed at the rear end portion of the conductive member 6 drawn into the reflecting plate 3 through the insertion hole 33 so as to be in contact with the instrument body 1. The circuit ground of the ballast 5 is electrically connected to the instrument body 1 via the case 5a. As a result, the three conductive members 6 are connected to the circuit ground of the ballast 5 via the instrument body 1. Will be electrically connected.

  By the way, in this embodiment, the three electroconductive members 6 are arrange | positioned from the longitudinal direction center in the instrument main body 1 to one end side (near the low voltage | pressure side socket 2 mentioned later), and the longitudinal direction center in the instrument main body 1 is arrange | positioned. A plurality of (three in the illustrated example) support members 8 made of an insulating material are disposed on the other end side (close to the high-pressure side socket 2 described later) on the inclined surfaces on both sides of the reflector 3 in the longitudinal direction of the instrument body 1. They are arranged at substantially equal intervals so as to be aligned with the conductive members 6 along the direction. The support member 8 is made of a synthetic resin material having translucency such as acrylic resin, is attached to the reflector 3 at the base end portion, and grips the tube wall of the lamp 4 at the tip end portion formed in a semi-annular shape. Is. The low-voltage side socket 2 refers to the socket 2 connected to the output end connected to the circuit ground side of the ballast 5, and the high-voltage side socket 2 is connected to the circuit ground of the ballast 5. The socket 2 connected with the output terminal which is not made is pointed out.

  Thus, the stray capacitance generated between the tube wall of the lamp 4 and the reflector 3 or the instrument body 1 capacitively couples the lamp 4 with the reflector 3 and the instrument body 1 to form a closed loop. The leaked radio wave (radiation noise) is radiated by the flow of the high-frequency current output from the vessel 5. In the present embodiment, the conductive member 6 can eliminate the closed loop to reduce the radiation noise. In addition, unlike the conventional example, the arrangement of the ballast 5 with respect to the instrument body 1 is not restricted, and the light from the lamp 4 is not unnecessarily blocked. Here, FIG. 5A shows the result of measuring the leakage radio wave (radiation noise) of the present embodiment by the measurement method of the leakage radio wave test stipulated by the VCCI (Electromagnetic Interference Regulations for Information Processing Devices, etc.). The measurement result of the conventional example is shown in FIG. However, in FIG. 5, the vertical polarization of the leaked radio wave is indicated by a solid line A, and the horizontal polarization is indicated by a solid line B. For reference, the reference value of VCCI Class B is indicated by a straight line C.

  As is clear from the experimental results in FIG. 5, in the conventional example, there is a peak of 42 dB of leaked radio waves (radiation noise) in the vicinity of 30 MHz and 90 MHz (see FIG. 5B). The peak value is reduced to 28 dB. In addition, about the fluorescent lamp lighting fixture which concerns on this invention, although it is not contained in the control object of 30 MHz or more in VCCI, it cannot be overemphasized that it is desirable that there are few leaked electromagnetic waves.

  By the way, in this embodiment, the three conductive members 6 are arranged so as to be biased toward the socket 2 on the low-pressure side from the longitudinal center in the instrument main body 1, but instead of the support member 8 made of an insulating material, the conductive members 6 6 may be arranged. However, compared to the high pressure side of the lamp 4 (the base side connected to the socket 2 on the high pressure side), the distance of the closed loop on the low pressure side (the base side connected to the socket 2 on the low pressure side) becomes longer and leaks. Since the influence on the emission of radio waves is large, even if the conductive member 6 is arranged only near the low-pressure side socket 2 as in the present embodiment, the leaked radio waves are sufficiently generated as is apparent from the above measurement results. Can be reduced.

  Further, when the metal conductive member 6 is arranged to be biased to one side of the instrument body 1, the support balance of the lamp 4 is deteriorated. In this embodiment, the support member 8 made of an insulating material is replaced with the conductive member. By deviating to the side opposite to 6, deterioration of the support balance of the lamp 4 can be prevented. Furthermore, since the support member 8 is formed of a transparent resin material, the light of the lamp 4 can be prevented from being blocked by the support member 8. Moreover, since the insertion hole 33 through which the conductive member 6 is inserted is provided in the projecting surface of the reflecting plate 3 facing the lamp 4, the total length of the conductive member 6 can be shortened to prevent an increase in electrical resistance. In addition, there is an advantage that a reduction in reflection efficiency due to the conductive member 6 can be suppressed.

1 shows an embodiment of the present invention, (a) is a front view, (b) is a top view, and (c) is a left side view. It is a perspective view same as the above. It is a half sectional view same as the above. It is an exploded perspective view same as the above. The measurement result of a leaked electric wave is shown, (a) is this embodiment, (b) is a conventional example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Instrument body 2 Socket 3 Reflector 4 Lamp 5 Ballast 6 Conductive member 8 Support member

Claims (4)

  At least a pair of lamp sockets in which straight tube fluorescent lamps are detachably mounted, an appliance body made of a metal material and provided with lamp sockets at both ends in the longitudinal direction, and a lamp attached to the appliance body A fluorescent lamp electronic ballast that lights the fluorescent lamp through the socket, a reflector that is attached to the fixture body so as to cover the fluorescent lamp electronic ballast and reflects the light of the fluorescent lamp, and an outer peripheral surface of the fluorescent lamp on one end side A fluorescent lamp illuminating device comprising one or more conductive members that are in contact with each other and are electrically connected to the device main body on the other end side.   2. The fluorescent lamp luminaire according to claim 1, wherein the conductive member is disposed near the lamp socket on the low voltage side with respect to the center in the longitudinal direction of the fixture body.   Provided near the lamp socket on the high voltage side with respect to the center in the longitudinal direction of the fixture body, and provided with a support member made of an insulating material that supports the fluorescent lamp mounted on the lamp socket, and the conductive member is mounted on the lamp socket The fluorescent lamp luminaire according to claim 2, further comprising a support portion that supports the fluorescent lamp.   The fluorescent lamp luminaire according to any one of claims 1 to 3, wherein a hole through which the conductive member is inserted is provided in the reflector.

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