JP4288256B2 - Light bulb-type fluorescent lamp and lighting device - Google Patents

Description

  The present invention relates to an arc tube, a light bulb-type fluorescent lamp including a lighting device for lighting the arc tube, and an illumination device using the light bulb-type fluorescent lamp.

  Conventionally, a bulb-type fluorescent lamp has an arc tube having a bent bulb, a cover with a cap attached to one end and a support for the arc tube on the other end, a lighting device housed in the cover, and a cover for the arc tube. A glove attached to the other end of the cover is provided.

  In recent years, such a bulb-type fluorescent lamp has been miniaturized to have a lamp length size and a maximum outer diameter size that are close to those of a general lighting bulb defined in JIS. The maximum outer diameter of was large. Therefore, it is not enough to get close to the appearance of a general lighting bulb, and the ratio of light that goes to the base side is blocked by the cover is large, and the light distribution characteristics at the time of lighting are also enough to get close to the general lighting bulb. There wasn't.

In addition, the lighting device substrate housed in the cover is vertically arranged along the lamp height direction, and a narrow portion is formed on the base side of the substrate so that it can be inserted along the position of the central axis of the base. There is a configuration of a light bulb shaped fluorescent lamp in which a narrow part of a substrate and a part of an electronic component mounted on the narrow part are arranged inside a base (for example, refer to Patent Document 1).
Japanese Patent Laying-Open No. 2004-165053 (Page 4, FIGS. 1-4)

  As described above, the substrate is vertically arranged, and the narrow portion of the substrate and a part of the electronic component are arranged inside the die, thereby reducing the size of the substrate in the cover portion outside the die and the cover. Miniaturization is also conceivable. However, the narrow part of the board is arranged along the position of the central axis of the base, and the maximum value of the facing distance between both surfaces on which the electronic components of the board are mounted and the inner side of the base facing each side is the inner side of the base It becomes 1/2 of the maximum width of the space (the maximum width of the inner space of the cylindrical portion of the cover when the cylindrical portion of the cover protrudes inside the base), and the height of the electronic component can be arranged within this facing interval. It is limited to the range. Therefore, an electronic component such as a choke coil, which has a high protruding height from the substrate and cannot be placed inside the base, must be placed outside the base. In addition, electronic components such as a smoothing capacitor having a relatively large height are mounted with the lead wires bent at approximately 90 ° so that the longitudinal direction thereof is along the substrate, and the height at which the electronic component protrudes from the substrate. In this case, the occupied area of the electronic component on the substrate becomes large and the substrate becomes large.

  In this way, if the board is placed vertically and the narrow part of the board and a part of the electronic components are placed inside the base, the lighting device cannot be efficiently stored inside the base, and the cover can be made compact enough. However, it was difficult to achieve an appearance close to that of a general lighting bulb.

  The present invention has been made in view of the above points, and can efficiently store the lighting device inside the base, thereby enabling the miniaturization of the cover, and illumination using the light bulb-shaped fluorescent lamp. An object is to provide an apparatus.

The bulb-type fluorescent lamp according to claim 1 has an arc tube, a substrate portion supporting one end side of the arc tube, and a cylindrical portion projecting from the substrate portion to the one end side. holder is mounted et the other end with the die is attached to one end; a pair of board mounting grooves facing each other at a position offset is holder and which is formed along the direction of the holder center line with respect to the line a cover; has a board on which electronic components are mounted that constitute a lighting circuit for lighting an arc tube, the substrate is formed to a width dimension that can be inserted inside the die Rutotomoni, the edge portions on both sides of the substrate A pair of overhanging portions are formed to project along the substrate surface direction, and the pair of overhanging portions are inserted into and engaged with the pair of substrate mounting grooves of the holder, and are arranged vertically along the direction of the center line of the base. Along with the center line of the base Te is disposed at a position offset, and a lighting device large electronic components are arranged of the electronic component in the interval is wide one surface of the substrate with the ferrule; are those that are provided with, on the inside of the base The lighting device can be stored efficiently, thereby reducing the size of the cover and obtaining substantially the same appearance as a general lighting bulb. Furthermore, the substrate can be supported on the cover using the pair of overhang portions.

  The arc tube includes a bent arc tube in which a plurality of U-shaped bulbs are arranged in parallel to form one discharge path, an arc tube in which one bulb is bent in a spiral shape, and the like at both ends of the discharge path. In general, a pair of electrodes is sealed, but a so-called electrodeless system in which the pair of electrodes are not sealed in the arc tube may be used.

  A screw-in type referred to as an E-type is normally used as the base, but it is not limited to this as long as it can be attached to a socket to which a general lighting bulb is attached.

  The cover supports the arc tube indirectly and directly. In the case of indirectly supporting the arc tube, it is preferable to use a holder to which the arc tube can be attached to the other end side of the cover. Further, a glove that covers the arc tube may be attached to the cover.

  The lighting circuit of the lighting device includes, for example, an inverter circuit mainly composed of electronic components that turn on the arc tube by applying high-frequency power of 10 kHz or more to the arc tube.

  The substrate is formed in a substantially rectangular shape with a width dimension that allows it to be inserted vertically inside the base. What is necessary is just to set the offset amount of the board | substrate with respect to the center axis | shaft of a nozzle | cap | die suitably in relation to the mounting area of a board | substrate, and the height dimension of mounting components.

  Examples of the electronic component disposed on one surface having a large distance from the base of the substrate include a choke coil and a smoothing capacitor. Electronic components such as low-profile transistors, chip-type capacitors, and rectifier elements may be mounted on the other surface opposite to one surface of the substrate. It is preferable that a surface mounting type electronic component is mounted on the other surface. The surface mounting type electronic component means one that is led out from the component main body so that the lead wire extends substantially parallel to the mounting surface.

  The light bulb shaped fluorescent lamp according to claim 2 is the light bulb shaped fluorescent lamp according to claim 1, wherein the substrate offset from the center line of the base is from one surface of the substrate having a large distance to the base to the inner wall of the facing base. The distance A and the inner diameter B of the base are disposed at positions satisfying the relationship of 0.5 <A / B ≦ 0.8.

  When the ratio A / B is 0.5 or less, it becomes difficult to store a large electronic component. When the ratio A / B is greater than 0.8, the width of the board becomes narrower, and the mounting area of the board becomes smaller. Since it becomes small and the mounting efficiency of an electronic component falls, it is not preferable. When an electronic component is mounted on the inside of the E26 type base, the ratio A / B is more preferably in the range of 0.6 to 0.75 in consideration of the height dimension, mounting efficiency, and the like.

  Further, when the space inside the base is cylindrical, a range up to 3/4 of the inner diameter is preferable. When the offset amount is closer to the inner surface of the die than the position of 3/4, the width of the substrate is narrowed, the mounting area of the substrate is reduced, and the mounting efficiency of the electronic component is lowered.

  The light bulb shaped fluorescent lamp according to claim 3 is the light bulb shaped fluorescent lamp according to claim 1 or 2, wherein the electronic component located on the edge side in the width direction of the substrate is inclined toward the center in the width direction of the substrate. The electronic component is inserted without hitting the inside of the base, and the lighting device is efficiently stored inside the base.

  The electronic component to be tilted is a discrete component, which is a so-called radial component that is mounted on a substrate with two lead wires.

  The light bulb shaped fluorescent lamp according to claim 4 is the light bulb shaped fluorescent lamp according to any one of claims 1 to 3, wherein the smoothing capacitor of the electronic components mounted on the substrate is a substrate in a widthwise central region of one surface of the substrate. In this case, the mounting efficiency of the substrate is improved and the substrate can be miniaturized.

  The light bulb shaped fluorescent lamp according to claim 5 is the light bulb shaped fluorescent lamp according to any one of claims 1 to 4, wherein an input power supply circuit connected to the base from one end side to the other end side of the substrate is connected to the input power supply circuit. The connected inverter circuit and the output part of the inverter circuit connected to the arc tube are formed in order, and the wiring pattern formed on the substrate can be formed in one direction from the input side to the output side. As a result, wiring patterns need not be routed and the substrate can be miniaturized.

  A light bulb shaped fluorescent lamp according to a sixth aspect is the light bulb shaped fluorescent lamp according to any one of the first to fifth aspects, wherein a recess for preventing interference with an electronic component is formed on the inner surface of the cover.

  The recess is formed so as to prevent interference with a corner of a large electronic component such as a choke coil or an electrolytic capacitor. This includes the case where the target electronic component is disposed in the recess in the assembled state of the light bulb-type fluorescent lamp, and the case where the target electronic component is passed during assembly and is not disposed in the assembled state.

Lighting device 請 Motomeko 7 described, the lighting equipment main body; has and a self-ballasted fluorescent lamp to 6 any one according claims 1 mounted on the socket; a socket attached to the luminaire body Is.

According to the bulb-type fluorescent lamp of claim 1, the substrate formed in a width dimension that can be inserted inside the base is arranged vertically along the direction of the center line of the base, and with respect to the center line of the base Since the large electronic components among the electronic components can be arranged on one side with a wide space between the base and the base of the board, the lighting device can be efficiently stored inside the base, The cover can be miniaturized and can have the same appearance as a general lighting bulb. In addition, since the overhanging portions are formed along the substrate surface direction at the edges on both sides of the substrate, the pair of overhanging portions can be used to support the substrate in the substrate mounting groove of the holder, and an extra support structure is provided. I don't need it.

  According to the light bulb shaped fluorescent lamp according to claim 2, in addition to the effect of the light bulb shaped fluorescent lamp according to claim 1, the substrate offset with respect to the center line of the base is from one surface of the substrate having a wide interval with the base. Since the distance A to the inner wall of the cap and the inner diameter B of the cap are arranged at a position satisfying the relationship of 0.5 <A / B ≦ 0.8, a large electronic component can be arranged. However, the mounting area of the electronic component can be secured by securing the width of the substrate.

  According to the light bulb shaped fluorescent lamp according to claim 3, in addition to the effect of the light bulb shaped fluorescent lamp according to claim 1 or 2, an electronic component located on the side in the width direction of the substrate approaching the base is mounted on the substrate. Since the electronic component is inclined toward the central portion in the width direction, the electronic component can be inserted without hitting the inside of the base, and the lighting device can be efficiently stored inside the base.

  According to the light bulb shaped fluorescent lamp according to claim 4, in addition to the effect of the light bulb shaped fluorescent lamp according to any one of claims 1 to 3, a smoothing capacitor having a relatively high height among electronic components mounted on a substrate. Can be mounted in the central region in the width direction of one surface of the substrate in a direction perpendicular to the substrate, so that the mounting efficiency of the substrate is improved and the substrate can be miniaturized.

  According to the light bulb shaped fluorescent lamp according to claim 5, in addition to the effect of the light bulb shaped fluorescent lamp according to any one of claims 1 to 4, in addition to the substrate on the arc tube side from the one end side of the substrate on the cap side. By forming the input power supply circuit, the inverter circuit, and the output part of the inverter circuit in order from the end side, the wiring pattern to be formed on the substrate can be formed in one direction from the input side to the output side. As a result, the substrate can be reduced in size.

  According to the light bulb shaped fluorescent lamp according to claim 6, in addition to the effect of the light bulb shaped fluorescent lamp according to any one of claims 1 to 5, an electronic component disposed on the substrate by a recess formed in the inner surface of the cover; Therefore, at the time of assembly, it is difficult for the cover and the electronic component to come into contact with each other, and the assemblability can be improved. In addition, if the position of the board that is offset from the center line of the base is moved closer to the center line as much as the interference with the electronic parts can be prevented, the width of the board should be increased to increase the mounting area of the electronic parts. You can also.

請 lighting device Motomeko 7 described may provide a lighting apparatus having the action of claims 1 to 6 self-ballasted fluorescent lamp of any one described.

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

FIG. 1 to FIG. 8 show the prerequisite technology , FIG. 1 is a cross-sectional view seen from the direction in which bulbs are arranged in a bulb-type fluorescent lamp, and FIG. 2 intersects the direction in which bulbs are arranged in a bulb-type fluorescent lamp. 3 is a cross-sectional view of the bulb-type fluorescent lamp, FIG. 3 is a cross-sectional view of the bulb-type fluorescent lamp, and FIG. 4 is a perspective view of the holder of the bulb-type fluorescent lamp. 6 is an end view showing the positional relationship between the holder, the arc tube, and the substrate, FIG. 6 is a cross-sectional view showing the positional relationship between the substrate and the base of the bulb-type fluorescent lamp, and FIG. 8 is a schematic view of an illumination device using a bulb-type fluorescent lamp.

  1 and 2, reference numeral 11 denotes a light bulb-type fluorescent lamp. The light bulb-type fluorescent lamp 11 includes a cover 13 having a base 12 at one end in the height direction, and an arc tube 14 supported on the other end side of the cover 13. A holder 15 attached to the cover 13 to support one end side of the arc tube 14, a globe 16 attached to the cover 13 covering the arc tube 14, a base 12 and a lighting device 17 housed inside the cover 13. It has. The rated power is formed to have substantially the same appearance as that of a general lighting bulb such as a 40 W type, 60 W type, or 100 W type incandescent bulb. This general lighting bulb is defined in JIS C 7501.

  The base 12 is an Edison type E26 type or the like, and includes a cylindrical shell 21 having a thread and an eyelet 23 provided on the top of one end side of the shell 21 via an insulating portion 22. The other end of the shell 21 is placed on one end of the cover 13 and fixed by an adhesive or caulking.

  Further, the cover 13 is formed of a heat-resistant synthetic resin such as polybutylene terephthalate (PBT), and a cylindrical base mounting portion 26 to which the shell 21 of the base 12 is attached is formed on one end side, and the other end side is formed. An expanded annular cover portion 27 is formed on the inner side, and a holder attaching portion 28 for attaching the holder 15 is formed on the inner side.

  The arc tube 14 has at least three U-shaped bent valves 31, 32, 33, and these valves 31, 32, 33 are sequentially connected by a communication pipe 34 to form one continuous discharge path. 35 is formed. Each communication pipe 34 is formed by joining openings formed by blowing and breaking the vicinity of the end where the valves 31, 32, and 33 are connected to each other.

  The bulbs 31, 32, and 33 are formed in a substantially U shape in which a tube body having a substantially cylindrical cross section made of glass having a tube outer diameter of 3 to 8 mm is curved at an intermediate portion and has a top portion. That is, the valves 31, 32, and 33 include a bent portion that is curved and a pair of straight pipe portions that are continuous with the bent portion and are parallel to each other. The valves 31, 32, 33 have a relationship in which the height of the central U-shaped bent valve 32 is higher than the height of the U-shaped bent valves 31, 33 on both sides, and the U-shaped surfaces are parallel to each other. It is arranged side by side so as to face each other.

  For example, a three-wavelength phosphor is formed on the inner surface of the arc tube 14, and the arc tube 14 is filled with a rare gas such as argon (Ar), neon (Ne), krypton (Kr), or mercury. Is enclosed.

  A pair of electrodes 36 are sealed with stem seals or pinch seals at one end portions of the bulbs 31 and 33 located on both ends of the discharge path 35. Each electrode 36 has a filament coil, and this filament coil is supported by a pair of linear wells. Each well is, for example, a pair of wires 37 that are led out from one end of the bulbs 31 and 33 on both sides and connected to the lighting device 17 via a jumet wire sealed at one end of the bulbs 31 and 33 on both sides. (See FIG. 5).

  Cylindrical narrow tubes 38, which are also called exhaust pipes, are connected to each end where the electrodes 36 of the valves 31 and 33 on both sides are sealed, and to both ends of the central valve 32 by stem seals or pinch seals. Projected. Each of these capillaries 38 is sequentially sealed by fusing in the manufacturing process of the arc tube 14, and the arc tube 14 is exhausted through an unsealed part of each of the capillaries 38, and an enclosed gas is enclosed. After the replacement, the unsealed part of each capillary 38 is sealed by fusing.

  Of the narrow tubes 38 at both ends of the central valve 32, one narrow tube 38 is formed in a long shape so that the tip extends to the inside of the base 12 and is in a straight line parallel to the straight tube portion of the valve 32. The main amalgam 39 as an amalgam is encapsulated at the tip portion when sealed. The main amalgam 39 is an alloy composed of bismuth, tin and mercury, is formed in a substantially spherical shape, and has an action of controlling the mercury vapor pressure in the arc tube 14 within an appropriate range. In addition, as the main amalgam 39, you may use what was formed with the alloy which combined indium, lead, etc. other than bismuth and tin. Further, auxiliary amalgam having mercury adsorption / release action is attached and sealed in the wells of the electrodes of the bulbs 31 and 33 at both ends. Further, an auxiliary amalgam similar to the auxiliary amalgam provided in the valves 31 and 33 at both ends is also sealed at the other end of the central valve 32.

  In the arc tube 14, a pair of electrode side end portions 40 in which a pair of electrodes 36 of the bulbs 31, 32, 33 are sealed are located on one end side in the height direction. The bulbs 31, 32, and 33 have a tube outer diameter of 3 to 8 mm and a maximum width b1 in the width direction intersecting the height direction of 30 mm or less.

  As shown in FIGS. 1 to 5, the holder 15 is made of a heat-resistant synthetic resin material such as polybutylene terephthalate (PBT), for example, and has a disk-shaped substrate portion 42 and a peripheral portion of the substrate portion 42. A cylindrical tube portion 43 protruding from the one end to the one end side is provided.

  A protrusion 44 that can be inserted between the bulbs 31, 32, and 33 of the arc tube 14 protrudes from the central portion of the substrate portion 42, and each bulb 31, 32, 33 is formed on the peripheral surface of the protrusion 44. Arc-shaped depressions 45 are formed as bulb mounting parts that are fitted to the end faces of the arc tube 14 and the peripheral surface part facing the center side of the arc tube 14, and these depressions 45 are formed inside the holder 15. A mounting hole 46 that communicates is formed.

  Insertion holes 47 are formed in the substrate portion 42 so as to face the end faces of the valves 31, 32, 33. The wires 37 and the narrow tubes projecting from the ends of the valves 31, 32, 33 are inserted into the insertion holes 47. 38 is inserted. The diameter of the insertion hole 47 is smaller than the diameter of the valves 31, 32, 33, and the end portions of the valves 31, 32, 33 do not enter the insertion hole 47.

  Then, after the arc tube 14 is combined with the holder 15, by injecting an adhesive such as silicone resin or epoxy resin from the inside of the holder 15 through each mounting hole 46 and each insertion hole 47, each bulb 31, 32, The inner peripheral surface side facing the center side of the arc tube 14 and the end surfaces of the bulbs 31, 32, 33 are bonded and fixed to the holder 15.

  A claw portion 48 that is attached to the holder attachment portion 28 of the cover 13 is formed at one end portion of the cylindrical portion 43. A pair of substrate mounting portions 50 having a pair of substrate mounting grooves 49 facing each other at a position offset from the center line of the holder 15 are formed inside the cylindrical portion 43. The substrate mounting groove 49 is formed in parallel with the center line of the holder 15 and is formed to be open on one end side of the cylindrical portion 43. In addition, a pair of notches 51 are formed in the cylinder portion 43 on the opposite side to the side where the pair of substrate mounting portions 50 are formed offset.

  The globe 16 is made of a material such as transparent or light diffusing glass or synthetic resin and has a smooth curved surface close to the shape of a glass bulb of a general lighting bulb such as an incandescent bulb. An opening 54 is formed at one end of the globe 16, and an edge 55 of the opening 54 is fitted inside the cover 27 of the cover 13, and is adhered by a viscous adhesive such as silicone resin or epoxy resin. It is fixed.

  Further, the lighting device 17 includes a substrate 58, and a plurality of electronic components 60 constituting the lighting circuit 59 are mounted on the substrate 58. The substrate 58 is formed in a substantially rectangular shape having a width dimension that can be inserted inside the base 12 and having a height dimension that is longer than the width dimension, and both side edges of the substrate 58 are a pair of substrates of the holder 15. The holder 15 is inserted into and engaged with the mounting groove 49 and is arranged vertically along the direction of the center axis of the holder 15, and is arranged at a position offset from the center line of the holder 15. That is, in a state in which the base 12, the cover 13, and the holder 15 are combined, the substrate 58 is disposed vertically along the direction of the center line of the base 12 with respect to the inside of the base 12, and the base 12 Arranged at a position offset from the center line. The position of the substrate 58 in the direction intersecting the height direction is temporarily fixed by the substrate mounting portion 50 of the holder 15, and by connecting the wire 37 of the arc tube 14 and a wrapping pin 61 described later, or the base 12 and the holder 15 The position in the height direction is positioned and held by being sandwiched between them.

  The electronic components 60 are mounted on both sides of the board 58, but on one side of the board 58 where the distance from the base 12 is wide, a transformer CT such as a ballast choke as a current limiting inductor of the electronic parts 60, a capacitor Large electronic components 60 such as C1 and electrolytic capacitor C2 as a smoothing capacitor are mounted, and on the other side of the board 58 where the distance from the base 12 is narrow, the height of the electronic component 60 is A surface-mount type electronic component 60 such as a low transistor, a chip-type capacitor, or a rectifier is mounted.

  The MOS type N-channel field effect transistor Q1 and the MOS type P-channel field effect transistor Q2 as transistors are surface-mounted as one package component on the other surface.

  The smoothing electrolytic capacitor C2 is mounted so as to be perpendicular to the substrate 58 in the center region in the width direction of one surface of the substrate 58. Thereby, the mounting efficiency of the substrate 58 is improved, and the substrate 58 can be miniaturized.

  For example, the capacitor C1 is inclined toward the width direction center portion side of the substrate 58 as the electronic component 60 located on the width direction edge portion side of the substrate 58 approaching the base 12. Accordingly, the capacitor C1 can be inserted without hitting the inside of the base 12, and the lighting device 17 can be efficiently stored inside the base 12. The electronic component 60 to be inclined, such as the capacitor C1, is a discrete component and is a so-called radial component that is mounted on the substrate 58 with two lead wires.

  The substrate 58 is provided with four wrapping pins 61 projecting from the other end, which is the arc tube 14 side, by winding and connecting a pair of wires 37 of the electrodes 36 of the arc tube 14 as connection terminals.

  Further, a narrow tube 38 enclosing the main amalgam 39 is disposed between the surface side of the substrate 58 where the distance from the base 12 is narrow. Thereby, the lighting device 17 and the thin tube 38 are efficiently arranged inside the base 12.

  The offset amount of the substrate 58 with respect to the central axis of the base 12 is preferably in a range up to a position that is 3/4 of the inner diameter of the base 12. When the offset amount is closer to the inner surface of the base 12 than the position of 3/4, the width of the substrate 58 is reduced, the mounting area of the substrate 58 is reduced, and the mounting efficiency of the electronic component 60 is reduced. Absent.

  More specifically, as shown in FIG. 6, the offset amount of the substrate 58 with respect to the center line of the base 12 is the distance A from the one surface of the substrate 58 having a large distance from the base 12 to the inner wall of the opposing base 12 and the base. It is preferable that the relationship with the inner diameter B is in the range of 0.5 <A / B ≦ 0.8. When the ratio A / B is 0.5 or less, it becomes difficult to store the large electronic component 60 in the base 12, and when the ratio A / B is larger than 0.8, the width of the substrate 58 is narrow. This is not preferable because the mounting area of the substrate 58 is reduced and the mounting efficiency of the electronic component 60 is reduced. In the case of the E26 type base 12, the ratio A / B is more preferably in the range of 0.6 to 0.75 in consideration of the height of the electronic component 60 and the like.

  FIG. 7 shows a circuit diagram of the lighting device. A capacitor C1 constituting a filter is connected to the commercial AC power source e via a fuse F1, and an input terminal of a full-wave rectifier 71 is connected to the capacitor C1 via an inductor L1 constituting the filter. Further, a smoothing electrolytic capacitor C2 is connected to the output terminal of the full-wave rectifier 71 to constitute an input power supply circuit E. The smoothing electrolytic capacitor C2 of the input power supply circuit E has an AC power supply that generates a high frequency. The inverter main circuit 73 of the half bridge type inverter circuit 72 is connected.

  The inverter main circuit 73 includes a field effect transistor Q1 as a MOS-type N-channel transistor that is complementary to each other as a switching element and a MOS-type P-channel transistor in parallel with the electrolytic capacitor C2 for smoothing. A field effect transistor Q2 as a transistor is connected in series. The sources of the N-channel field effect transistor Q1 and the P-channel field effect transistor Q2 are connected to each other.

  Between the drain and source of the field effect transistor Q2, a series circuit of a primary winding L2 of a non-saturated current transformer CT constituting a ballast choke as a resonant inductor, a DC cut capacitor C3, and a resonant capacitor C4 is connected. One end of electrode filament coils FLa and FLb as filaments at both ends of the fluorescent lamp FL as the arc tube 14 is connected to the resonance capacitor C4, respectively, and the other end of one electrode filament coil FLa and the other electrode filament coil FLb A preheating / starting capacitor C5 that contributes to resonance is connected to the other end of the capacitor together with the resonance capacitor C4. An emitter is applied to the electrode filament coils FLa and FLb. In addition, a positive temperature characteristic resistive element (Positive Temperature Coefficient) PTC1 is connected in parallel to the resonant capacitor C4.

  A starting resistor R1 constituting the starting circuit 75 is connected between the smoothing electrolytic capacitor C2, the gate of the field effect transistor Q1 and the gate of the field effect transistor Q2, and the gates of these field effect transistors Q1. And a series circuit of a capacitor C6 and a capacitor C7 is connected between the gate of the field effect transistor Q2 and the source of the field effect transistor Q1 and the field effect transistor Q2, and the capacitor C6 and the gate control circuit 76 as a gate control means A series circuit of a Zener diode ZD1 and a Zener diode ZD2 for gate protection of the field effect transistor Q1 and the field effect transistor Q2 is connected in parallel to the series circuit of the capacitor C7. The primary winding L2 of the transformer CT is provided with a secondary winding L3 that is magnetically coupled. The secondary winding L3 has an inductor L4 having one end connected to the connection point of the capacitors C6 and C7. Is connected to the connection point between the other end of the capacitor and the discharging resistor R2. The capacitor C6 also constitutes a trigger element of the start circuit 75, and the discharge resistor R2 of the start circuit 75 is connected in parallel to the series circuit of the capacitor C6 and the inductor L4.

  In addition, a parallel circuit of the resistor R3 of the starting circuit 75 and the capacitor C8 for improving switching is connected between the drain and source of the field effect transistor Q2.

  Moreover, negative temperature characteristic resistance elements (Negative Temperature Coefficient) NTC1, NTC2 are connected between one end and the other end of each of the electrode filament coils FLa, FLb of the fluorescent lamp FL.

  Note that the positive temperature characteristic resistance element PTC1, the negative temperature characteristic resistance elements NTC1, NTC2, and the like may be wound around the wrapping pin 61 of the substrate 58 and connected so as to be close to the arc tube 14.

  Then, the operation of the lighting device 17 will be described.

  First, when the power is turned on, the voltage of the commercial AC power source e is full-wave rectified by the full-wave rectifier 71 and smoothed by the smoothing electrolytic capacitor C2.

  A voltage is applied to the gate of the N-channel field effect transistor Q1 via the resistor R1, and the field effect transistor Q1 is turned on. When the field effect transistor Q1 is turned on, a voltage is applied to the closed circuit of the primary winding L2, transformer C3, resonant capacitor C4, and capacitor C5 of the transformer CT, and the primary winding L2, transformer C3, resonant capacitor C4, and capacitor C5 of the transformer CT Resonates. At this time, the impedance component of the positive temperature characteristic resistance element PTC1 is also included as part of the resonance synthesis component. In addition, the inductance component of the primary winding L2 of the transformer CT has a magnitude that can be almost ignored as a resonance synthesis component. Then, a voltage is induced in the secondary winding L3 of the transformer CT, and the LC series circuit of the capacitor C7 and the inductor L4 of the gate control circuit 76 inherently resonates to turn on the field effect transistor Q1 at a substantially constant frequency. A voltage is generated to turn off the effect transistor Q2.

  Next, when the resonance voltage of the primary winding L2, transformer C3, resonant capacitor C4, and capacitor C5 of the transformer CT is inverted, a voltage opposite to the previous voltage is generated in the secondary winding L3, and the gate control circuit 76 generates a field effect transistor Q1. Is turned off, and a voltage for turning on the field effect transistor Q2 is generated. Further, when the resonant voltage of the primary winding L2, transformer C3, resonant capacitor C4, and capacitor C5 of the transformer CT is inverted, the field effect transistor Q1 is turned on and the field effect transistor Q2 is turned off. Thereafter, similarly, the field effect transistor Q1 and the field effect transistor Q2 are alternately turned on and off, a resonance voltage is generated, and a resonance current flows.

  In the state where this resonance current has flowed out, since the temperature of the positive temperature characteristic resistance element PTC1 is low, the resistance value is as low as about 3 kΩ to 5 kΩ, for example, and the current flowing through the positive temperature characteristic resistance element PTC1 is large. At this time, the resonance voltage generated between both ends of the resonance capacitor C4 becomes low.

  When current flows through the positive temperature characteristic resistance element PTC1, Joule heat is generated, and when the resistance value of the positive temperature characteristic resistance element PTC1 increases and the current flowing through the positive temperature characteristic resistance element PTC1 decreases, the resonance composite component changes. Therefore, the resonance operation changes so that the current flowing through the resonance capacitor C4 increases, and the soft start operation is performed so that the resonance voltage gradually increases.

  Part of the resonance current also flows through the capacitor C5, which is a part of the resonance capacitor, via the electrode filament coils FLa and FLb of the fluorescent lamp FL. Therefore, the electrode filament coils FLa and FLb are sufficient until the resonance voltage rises. It is preheated directly over a long time. Also, by providing the resonance capacitor C5 separately from the resonance capacitor C4, the capacitance for resonance is divided, and the capacitance of the capacitor C5 is preheated to the electrode filament coils FLa and FLb and the fluorescent lamp FL is turned on. It is possible to set the current that flows occasionally to an appropriate value, and the electrode filament coils FLa and FLb can be preheated efficiently, and the current that flows to the capacitor C5 can be reduced after the fluorescent lamp FL is lit. Can also be prevented.

  Furthermore, when the resistance value of the positive temperature characteristic resistance element PTC1 increases and the resonance current increases due to the change of the resonance component, and the voltage rises to the voltage necessary for starting the lamp, the fluorescent lamp FL starts to discharge, starts and lights up To do.

  After the fluorescent lamp FL is lit, the resonance voltage decreases because the resistance value of the positive temperature characteristic resistance element PTC1 is about several tens of kΩ and the equivalent resistance value of the fluorescent lamp FL is sufficiently smaller than the resistance value of the positive temperature characteristic resistance element PTC1. Then, the fluorescent lamp FL is kept on. In addition, by connecting the positive temperature characteristic resistance element PTC1 in parallel to the resonant capacitor C4 instead of the capacitor C5 as described above, the current flowing through the electrode filament coils FLa and FLb can be reduced, so that the power loss can be reduced accordingly. Can be suppressed.

  Thus, since the preheating of the electrode filament coils FLa and FLb of the fluorescent lamp FL can be made appropriate by the change in the resistance value of the positive temperature characteristic resistance element PTC1, the emitter can be prevented from being undesirably scattered (sputtered). The number of flashing lifetimes of the fluorescent lamp FL can be improved.

  In addition, when the temperature of the negative temperature characteristic resistance elements NTC1 and NTC2 before the start of the fluorescent lamp FL is low, the resistance values of the negative temperature characteristic resistance elements NTC1 and NTC2 are high. Flows through the electrode filament coils FLa and FLb, and preheats the electrode filament coils FLa and FLb appropriately. Further, as the resonance current increases, the negative temperature characteristic resistance elements NTC1 and NTC2 generate heat due to Joule heat due to a part of the resonance current that has also flowed in the negative temperature characteristic resistance elements NTC1 and NTC2, and further from the fluorescent lamp FL. The temperature rises under the influence of heat, and the resistance value of the negative temperature characteristic resistance elements NTC1, NTC2 decreases. As a result, the current flowing in the electrode filament coils FLa and FLb gradually flows in the negative temperature characteristic resistance elements NTC1 and NTC2.

  Furthermore, when the temperature of the negative temperature characteristic resistance elements NTC1 and NTC2 rises after the fluorescent lamp FL is turned on and the resistance value decreases as much as possible, most of the resonance current flows to the negative temperature characteristic resistance elements NTC1 and NTC2, and the electrode filament Since the coils FLa and FLb hardly flow, the power loss due to the electrode filament coils FLa and FLb can be reduced as much as possible.

  Also, the substrate 58 has an input power circuit E connected to the base 12, an inverter circuit 72 connected to the input power circuit E, and a light emission from one end side on the base 12 side to the other end side on the arc tube 14 side. The output part of the inverter circuit 72 connected to the pipe 14 is formed in order. Thereby, the wiring pattern formed on the substrate 58 is arranged in order in one direction from the input side to the output side, and the substrate 58 can be miniaturized.

  Next, in order to assemble the bulb-type fluorescent lamp 11, one end side of the arc tube 14 and the holder 15 are combined, and an adhesive is injected from the inside of the holder 15 through the mounting holes 46 and the insertion holes 47, and the arc tube 14 One end side and the holder 15 are bonded and fixed. Subsequently, both side edges of the substrate 58 are inserted into the pair of substrate mounting grooves 49 of the holder 15, the substrate 58 is inserted inside the holder 15, and each wire 37 of the arc tube 14 drawn out inside the holder 15 is inserted. Is wrapped around each wrapping pin 61 of the substrate 58 and connected (illustration of this wound state is omitted). Subsequently, the holder 15 and the cover 13 are combined and combined. Subsequently, an electric wire (not shown) connected in advance from the input portion side of the substrate 58 is connected to the shell 21 and the eyelet 23 of the base 12, and the base 12 is fitted into the cover 13 and fixed by caulking or adhesion. Subsequently, by injecting a heat conductive member into the base 12 through the notch 51 of the holder 15 with the base 12 facing down and the arc tube 14 facing upward, at least the notch 51 side of the holder 15 A heat conductive member is filled between the electronic component 60 such as a transformer CT located opposite to the base 12 and the side of the base 12 and the cover 13, or the whole inside of the base 12 is filled with the heat conductive member. Subsequently, the luminous bulb 14 is covered with a globe 16 and the globe 16 is fixed to the cover 13 with an adhesive.

  As shown in FIG. 8, for example, a lighting device 81 which is a downlight has a lighting fixture body 82, and a socket 83 and a reflector 84 are attached to the lighting fixture body 82. A fluorescent lamp 11 is mounted.

  The bulb-type fluorescent lamp 11 configured as described above has a substrate 58 formed in a width dimension that can be inserted inside the base 12 in a vertical shape along the direction of the center line of the base 12 and the base 12 Since the large electronic component 60 of the electronic components 60 can be arranged on one side having a wide space between the base plate 58 and the base 12 by being arranged at a position offset with respect to the center line, the lighting device inside the base 12 17 can be stored efficiently, and thus the cover 13 can be miniaturized.

  The position of the substrate 58 that is offset with respect to the center line of the base 12 is the relationship between the distance A from the one surface of the substrate 58 that is widely spaced from the base 12 to the inner wall of the opposing base 12 and the inner diameter B of the base 12. Since 5 <A / B ≦ 0.8, the width of the substrate 58 can be secured and the mounting area of the electronic component 60 can be secured while the large electronic component 60 can be disposed.

  Since the electronic component 60 located on the side of the width direction edge of the substrate 58 approaching the base 12 is inclined toward the central portion of the width direction of the substrate 58, the electronic component 60 is inserted without hitting the inside of the base 12 The lighting device 17 can be efficiently stored inside the base 12.

  The smoothing electrolytic capacitor C2 having a relatively high height among the electronic components 60 to be mounted on the substrate 58 can be mounted in the center region in the width direction on one surface of the substrate 58 in a direction perpendicular to the substrate 58. Mounting efficiency is improved, and the substrate 58 can be miniaturized.

  The input power supply circuit E, the inverter circuit 72, and the output portion of the inverter circuit 72 are formed in this order from one end side of the substrate 58 on the base 12 side to the other end side of the substrate 58 on the arc tube 14 side. The wiring patterns to be arranged can be arranged in one direction in order from the input side to the output side, and the substrate 58 can be miniaturized.

  Further, the main amalgam 39 of the thin tube 38 of the arc tube 14 is enclosed by arranging the substrate 58 formed in a width dimension that can be inserted inside the base 12 in a vertical shape along the direction of the center line of the base 12. Can be placed between the base 58 and the substrate 58 inside the base 12, while reducing the thermal effect from the arc tube 14 during lighting on the main amalgam 39, the lighting device 17 and the thin tube 38 inside the base 12 Can be arranged efficiently, whereby the cover 13 can be miniaturized.

  Since the substrate 58 is disposed at a position offset from the center line of the base 12 and the narrow tube 38 is disposed between the surface of the substrate 58 and the base 12 where the distance from the base 12 is narrow, the distance between the base 58 and the base 12 is The large electronic component 60 can be disposed on the wide surface side, and the lighting device 17 and the thin tube 38 can be efficiently disposed inside the base 12.

  As shown in FIG. 1, the bulb-type fluorescent lamp 11 configured in this way has a maximum width b1 in the width direction of the arc tube 14 having bulbs 31, 32, 33 having a tube outer diameter of 3 to 8 mm of 30 mm or less. The ratio of the dimension h2 of the cover 13 exposed from the base 12 to the lamp length dimension h1 excluding the base 12 is 0 to 25%, and the maximum outer diameter b2 of the cover 13 is 1 of the outer diameter dimension b3 of the base 12 0.0 to 1.5 times or 0.48 to 0.73 times the maximum outer diameter b4 of the globe 16 and the outer diameter of the globe 16 on the base 12 side can be formed to 40 mm or less. Thereby, substantially the same external appearance as a general lighting bulb such as an incandescent bulb can be obtained. When the ratio of the dimension h2 of the cover 13 exposed from the base 12 to the lamp length h1 excluding the base 12 is 0%, the cover 13 is from the base 12 when the bulb-type fluorescent lamp 11 is viewed from the width direction. In this case, the edge 55 of the opening 54 of the globe 16 is fitted to the shell 21 of the base 12.

  Further, the bulb-type fluorescent lamp 11 has an adhesive on the inner peripheral surface side of one end of the bulbs 31, 32, 33 in the recess 45 of the holder 15 facing the bulbs 31, 32, 33 from the center side of the arc tube 14. Since the outer peripheral surface of one end of the bulbs 31, 32, 33 is not blocked by the holder 15, the light emitted from the outer peripheral surface of the one end of the bulbs 31, 32, 33 can be used and emitted. Efficiency can be improved.

  In this way, the bulb-type fluorescent lamp 11 has substantially the same appearance as a general lighting bulb such as an incandescent bulb, and the light distribution toward the base 12 is improved so that it is close to that of a general lighting bulb such as an incandescent bulb. Light characteristics can be obtained, and the application rate to lighting fixtures using general lighting bulbs such as incandescent bulbs can be improved.

Next, FIG. 9 shows another presupposed technique, and each of the examples of FIGS. 9A to 9C is a cross-sectional view showing the relationship between the cover of the bulb-type fluorescent lamp and the lighting device.

  A recess 91 that prevents interference with the electronic component 60 is formed on the inner surface of the cover 13. FIG. 9A shows an example in which a depression 91 is formed corresponding to the tip of the electrolytic capacitor C2. Further, in FIG. 9B, when the transformer CT is arranged at a position closer to one side of the substrate 58, recesses 91 are formed corresponding to the flange portions at both ends of the coil bobbin around which the coil of the transformer CT is wound. An example is shown. Further, in FIG. 9C, when the transformer CT is arranged at the center position of the substrate 58 and curved capacitors C1, inductors L1, etc. are arranged at both sides of the transformer CT, the capacitors C1 and inductor L1 are arranged. The example which formed the hollow part 91 correspondingly is shown.

  Thus, the position of the substrate 58 that is offset with respect to the center line of the base 12 is prevented by preventing the interference with the electronic component 60 disposed on the substrate 58 by the recess 91 formed on the inner surface of the cover 13. If it is closer to the side, the mounting area of the electronic component 60 can be increased by widening the width of the substrate 58, or a plurality of electronic components 60 can be arranged in the width direction of the substrate 58, so that mounting efficiency can be improved. At the time of assembly, the cover 13 and the electronic component 60 are less likely to come into contact with each other, and the assemblability can be improved.

  In addition, this hollow part 91 is an assembled state when the target electronic component 60 is disposed in the hollow part 91 in the assembled state of the bulb-type fluorescent lamp 11 or when the target electronic component 60 passes during assembly. In the case of not being arranged.

  In addition, since the electronic component 60 such as the electrolytic capacitor C2 or the transformer CT has a corner portion, the same effect as the case where the hollow portion 91 is provided can be obtained by forming the corner portion of the electronic component 60 into a curved surface. In particular, by using in combination with the recess 91, more effects can be obtained.

Next, FIG. 10 shows this embodiment, and FIG. 10 is a front view of a part of the collective substrate from which the substrate of the bulb-type fluorescent lamp is cut out.

  A plurality of substrates 58 are formed from one large collective substrate 95. In the collective substrate 95, each substrate 58 on which a wiring pattern is formed is arranged in a plurality of rows vertically and horizontally, and each substrate is loaded by an automatic component loading machine. Each electronic component 60 is sequentially loaded on 58, and each electronic component 60 is soldered and connected to the wiring pattern of each substrate 58 by a soldering apparatus. A slit-like cut portion 96 is formed between the substrates 58, and the substrates 58 are separated by cutting along the cut portions 96.

  A capacitor C5, which is a chip capacitor, is surface-mounted at the center of the edge of the substrate 58 facing the arc tube 14 side.

  At the center between the wrapping pins 61 and 61 near the edge of the substrate 58 facing the arc tube 14 side, a capacitor C5, which is a ceramic chip capacitor, is provided on the other surface where the distance between the substrate 58 and the base 12 is narrow. Surface mounted. On the edge of the substrate 58, an overhang 97 is formed to project away from the capacitor C5. By forming the projecting portion 97, when the substrate 58 is cut out from one collective substrate 95, the capacitor C5 itself disposed near the edge of the substrate 58 or a soldered portion that connects the capacitor C5 to the substrate 58 is provided. A mechanical load can be prevented. If the overhanging portion 97 is formed only in a necessary portion, the substrate 58 can be reduced in size.

  The capacitor C5 is a preheating starting capacitor connected in parallel to the both end electrodes of the arc tube 14. By making this capacitor C5 a surface-mountable ceramic chip capacitor, the space between the wrapping pins 61 and 61 can be effectively used to increase the mounting efficiency of electronic components. Note that mounting the capacitor C5 between the connection terminals can also be applied to a lighting device in which the circuit board is placed horizontally with respect to the base 12, but when placed vertically as in the present embodiment. Has the advantage that a ceramic chip capacitor having excellent heat resistance can be used because the wrapping pin 61 is located on the arc tube 14 side and is likely to become high temperature.

  A pair of overhanging portions 98 and 98 that are engaged with the substrate mounting groove 49 of the holder 15 are formed at positions on both sides in the width direction of the substrate 58 that are closer to the arc tube 14 side. By forming these overhang portions 98, 98, it can be easily engaged with the substrate mounting groove 49 of the holder 15 and can function as a slide portion that can slide into the substrate mounting groove 49 of the holder 15. . In addition, if the overhang portions 98, 98 are formed only in the portions necessary for the engagement of the holder 15 with the substrate mounting groove 49, it is not necessary to add a separate support structure, so that the substrate 58 can be reduced in size.

  The overhanging portion 97 formed so as to be separated from the chip-like electronic component 60 disposed at the edge of the substrate 58 along the substrate surface direction is provided at the edge of the substrate 58 in the vertical direction on the base 12 side. Alternatively, it may be provided on both sides in the width direction of the substrate 58 and may also be used as the overhanging portion 98 that functions as a slide portion.

Note that, in the front you facilities, if the inner space of the base 12 is that not only the inside of the shell 21 of the base 12, a cylindrical mouthpiece attachment portion 26 protrudes so as to approach the eyelet 23, the mouthpiece The offset amount of the substrate 58 formed inside the attachment portion 26 is defined by the inner diameter of the base attachment portion 26.

  Further, the number of bulbs 31, 32, 33 of the arc tube 14 is not limited to three, but two or four or more may be arranged in parallel to make the discharge path length longer. Further, the arc tube 14 may be bent in a spiral shape so that the pair of electrode side end portions 40 where the pair of electrodes 36 are sealed is located at one end side in the height direction.

  In the above embodiment, the globe 16 can be omitted and the arc tube 14 can be exposed. In this case, substantially the same external dimensions and light distribution characteristics as a general lighting bulb such as an incandescent bulb can be obtained. Therefore, it is possible to further improve the rate of application to lighting fixtures that use general lighting bulbs such as incandescent bulbs.

It is sectional drawing seen from the juxtaposition direction of the bulb | bulb in the bulb-type fluorescent lamp which shows the technique used as the premise of this invention. It is sectional drawing seen from the direction which cross | intersects with the parallel arrangement direction of the bulb | bulb in a bulb-type fluorescent lamp same as the above. It is sectional drawing which removed the cover and globe of the bulb-type fluorescent lamp same as the above and was seen from the holder side. It is a perspective view of the holder of a bulb-type fluorescent lamp. It is an end view which shows the positional relationship of the holder of a bulb-type fluorescent lamp same as the above, an arc tube, and a board | substrate. It is sectional drawing which shows the positional relationship of the board | substrate of a bulb-type fluorescent lamp same as the above, and a nozzle | cap | die. It is a circuit diagram of the lighting device of the same bulb-type fluorescent lamp. It is the schematic of the illuminating device using a bulb-type fluorescent lamp same as the above. It is sectional drawing which shows the technique used as the other premise of this invention, and shows the relationship between the cover of a lightbulb-type fluorescent lamp and a lighting device in each example of (a)-(c). Which is part of the front view of the collective substrate cutting the substrate self-ballasted fluorescent lamp showing a form of implementation of the present invention.

11 Bulb-type fluorescent lamp
12 base
13 Cover
14 arc tube
15 holder
17 Lighting device
58 PCB
59 Lighting circuit
60 electronic components
72 Inverter circuit
81 Lighting equipment
82 Luminaire body
83 socket
91 depression
97 Overhang
C2 Electrolytic capacitor as a smoothing capacitor E Input power circuit

Claims (7)

Arc tube;
A pair of substrate attachments having a substrate portion supporting one end side of the arc tube and a cylindrical portion projecting from the substrate portion to the one end side and facing each other at positions offset from the holder center line inside the cylindrical portion A holder with grooves formed along the direction of the holder centerline;
And the cover holder is mounted et the other end with the die is attached to one end;
Has a substrate of electronic components constituting a lighting circuit for lighting the arc tube are mounted, the substrate is Rutotomoni are formed to the width to allow insertion inside the mouthpiece, the substrate surface direction to the edge portions on both sides of the substrate A pair of overhanging portions are formed so as to protrude along the base plate, and the pair of overhanging portions are inserted into and engaged with the pair of substrate mounting grooves of the holder, and are arranged vertically along the direction of the center line of the base. is disposed at a position offset relative to the center line, a lighting device large electronic components are arranged of the electronic component in the interval is wide one surface of the substrate with the ferrule;
A bulb-type fluorescent lamp characterized by comprising: The substrate offset with respect to the center line of the base is such that the distance A from the one surface of the substrate having a large distance to the base to the inner wall of the base and the inner diameter B of the base are 0.5 <A / B ≦ 0.8. The bulb-type fluorescent lamp according to claim 1, wherein the fluorescent lamp is disposed at a position satisfying the relationship. The electric bulb-type fluorescent lamp according to claim 1 or 2, wherein the electronic component positioned on the side in the width direction of the substrate is inclined toward the center in the width direction of the substrate. The smoothing capacitor of the electronic components mounted on the board is mounted in a direction perpendicular to the board in a central region in the width direction of one surface of the board. Light bulb-type fluorescent lamp. The input power circuit connected to the base, the inverter circuit connected to the input power circuit, and the output part of the inverter circuit connected to the arc tube are formed in order from one end of the substrate to the other end. The bulb-type fluorescent lamp according to any one of claims 1 to 4. 6. A light-bulb-type fluorescent lamp according to claim 1, wherein a recess for preventing interference with an electronic component is formed on the inner surface of the cover. A lighting fixture body;
A socket attached to the luminaire body;
A bulb-type fluorescent lamp according to any one of claims 1 to 6 mounted in a socket;
An illumination device comprising:

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