JP4066581B2 - Light bulb shaped fluorescent lamp - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a light bulb-type fluorescent lamp, and more particularly to a light bulb-type fluorescent lamp in which a connection structure between an arc tube and a lighting circuit is saved.
[0002]
[Prior art]
  2. Description of the Related Art Conventionally, there is known a light bulb-type fluorescent lamp that includes a cover having a base that can be attached to, for example, an incandescent light bulb socket, houses a lighting circuit inside the cover, and bends the arc tube and stores it in a globe. .
[0003]
  Although this bulb-type fluorescent lamp is miniaturized as much as possible for compatibility with incandescent bulbs, the conventional bulb-type fluorescent lamp has a slightly larger external dimension than incandescent bulbs. It has not yet been completely replaced from the light bulb. Therefore, further miniaturization of the bulb-type fluorescent lamp is desired, and miniaturization of the arc tube, globe and cover is under study.
[0004]
  On the other hand, as a method for connecting a light emitting tube of a bulb-type fluorescent lamp and a lighting circuit, for example, as disclosed in Japanese Patent Laid-Open No. 8-273615 (prior art 1), a wrapping pin is implanted on a circuit board. And the method of winding the lead wire led out from the arc tube around the pin is adopted.
[0005]
[Problems to be solved by the invention]
  However, although the conventional method for connecting the arc tube and the lighting circuit has no problem in reliability and workability, a space for planting wrapping pins on the circuit board is secured in the circuit board. There must be. Further, since a space of about 4 mm must be secured around the pin in order to wind the lead wire around the pin, it has an influence as a factor that hinders downsizing of the circuit board.
[0006]
  Furthermore, since the temperature inside the lamp rises with the small size and high output of the bulb-type fluorescent lamp, bromine gas is generated when the flame retardant contained in the partition plate molded from plastic is exposed to high temperature. Gas will corrode the lead wire. As a result, the contact resistance between the lead wire and the pin is increased, and in the worst case, there is a possibility that both are in an electrically non-contact state.
[0007]
  Japanese Patent Laid-Open No. 11-250730 (Prior Art 2) describes a configuration in which a wrapping pin is not provided on a circuit board. However, since the circuit board of the prior art 2 is provided with the electrical connection terminal on the peripheral surface and the lead wire is sandwiched between the electrical connection terminal and the cover, it is necessary to further improve the connection reliability. It was.
[0008]
  The present invention has been made in consideration of the above-described circumstances, and provides a light bulb-type fluorescent lamp that saves space in the connection structure between the arc tube and the lighting circuit and prevents connection failure due to corrosion of lead wires. With the goal.
[0009]
[Means for Solving the Problems]
  The bulb-type fluorescent lamp according to claim 1 includes: a cover having a base; an arc tube having a bulb formed by pulling out a lead wire to the outside; and being housed in the cover, on which electronic components are mounted and the lead wire is fixed. A lighting circuit having a circuit board provided with connection lands that are electrically connected to each other; a partition plate that fixes the arc tube and the circuit board while being fixed to the cover;The connecting land is formed on the peripheral surface of the circuit board and disposed at the opening edge of the insertion groove into which the lead wire is inserted.It is characterized by that.
[0010]
  Definitions of terms in claim 1 and the following claims are as follows.
[0011]
  The arc tube only needs to have a bent portion, and therefore, it is allowed to be an arc tube having various shapes such as double U and triple U. In addition, the arc tube has a pair of filament electrodes sealed inside the elongated glass bulb, a phosphor layer is directly or indirectly deposited on the inner surface, and a discharge medium such as rare gas and mercury is sealed inside. It is preferable that As the phosphor, a three-wavelength emission type rare earth phosphor or a calcium halophosphate phosphor can be used. The arc tube may use a rare gas discharge that does not enclose mercury, or may have an electrode outside.
[0012]
  The lighting circuit is preferably an inverter type, but is not limited to this because of the nature of the present invention as long as it has a circuit board. The lighting circuit is attached to and stored in the cover directly or indirectly.
[0013]
  As the base, a screw-in type called an E-type is usually used, but it is not limited to this. Further, the base need not be directly attached to the cover, but may be indirectly attached to the case, or a part of the cover may constitute the base.
[0014]
  The cover directly or indirectly supports the arc tube. As a means for supporting indirectly, it is preferable to attach a partition plate having a shape in which both ends of the arc tube can be inserted in a portion opposite to the direction in which the cover cap is attached.
[0015]
  A globe that covers the arc tube may be attached to the cover. The globe may be either light diffusive or transparent as long as it has light transparency, and may be patterned or colored. The material of the globe may be glass or plastic. The shape of the glove is arbitrary, but a so-called G-shaped shape that is generally similar to a sphere, a so-called T-shaped shape that is a spherical tip and a cylindrical shape, and the like can be adopted.
[0016]
  The circuit board includes various cutout circles such as a circle, an ellipse, and a semicircle.
[0017]
  The connection land is provided on the circuit board by printing or the like, and the material thereof may be copper, copper alloy, conductive metal such as aluminum, or conductive paint. The connection land only needs to be electrically connected to the lead wire of the electronic component through a printed circuit pattern formed on the lower surface of the circuit board, and directly connected to the lead wire of the electronic component mounted on the circuit board. It may be connected.
[0018]
  According to the light bulb shaped fluorescent lamp of claim 1, the wrapping pin is implanted on the circuit board by fixing the lead wire of the arc tube to the connection land provided on the circuit board and electrically connecting it. Therefore, a space for wrapping the lead wire around the pin is also unnecessary, and the circuit board can be miniaturized. In addition, even if the lead wire is exposed to the bromine gas and corroded, the lead wire and the connection land are firmly fixed, so that the electrical contact state can always be maintained.it can.
[0019]
  Also,Since the connection land is formed on the peripheral surface of the circuit board and disposed at the opening edge of the insertion groove into which the lead wire is inserted, the workability of the work of fixing the lead wire to the connection land can be improved. .
[0020]
  Claim 2The light bulb shaped fluorescent lamp is characterized in that the lead wire is inserted into the insertion groove and fixed to the connection land by soldering.
[0021]
  Claim 2According to this bulb-type fluorescent lamp, since the lead wire is inserted into the insertion groove and fixed to the connection land by soldering, the lead wire can be firmly fixed to the connection land. In addition, even if the lead wire is corroded by the generated bromine gas and corroded, the lead wire and the connection land are fixed by soldering, so that the electrical connection state can always be maintained.it can.
[0022]
  Claim 3The bulb-type fluorescent lamp includes: a cover having a base; an arc tube having a bulb formed by pulling out a lead wire to the outside; a lead wire and a lead wire of the electronic component housed in the cover and mounted with an electronic component A lighting circuit having a circuit board provided with connection lands that are inserted into the insertion holes and electrically connected to each other; and a partition plate that fixes the arc tube and the circuit board while being fixed to the cover. It is characterized by.
[0023]
  Claim 3According to the light bulb shaped fluorescent lamp, since the lead wire and the lead wire of the electronic component are inserted into the circuit board from the insertion hole and electrically connected to each other, the connection work between the lead wire and the lead wire is performed. In addition to being easy, the lead wire and the lead wire can be firmly fixed.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0025]
  FIG. 1 is a partial cross-sectional view showing a first embodiment of a bulb-type fluorescent lamp according to the present invention, FIG. 2 is a side view of the bulb-type fluorescent lamp shown in FIG. It is a disassembled perspective view which shows a part of lamp | ramp.
[0026]
  1 to 3, the bulb-type fluorescent lamp 10 is housed in a cover 14 having a base 12, a lighting circuit 16 housed in the cover 14, a translucent globe 17, and the globe 17. The arc tube 18 is provided. The arc tube 18 has four lead wires 20 each led out from two electrodes. And the envelope comprised from the cover 14 and the glove | globe 17 is formed in the external shape which approximates the standard dimension of the incandescent lamp of rated power 60W. In the following description, the base 12 side is the upper side and the globe 17 side is the lower side.
[0027]
  The cover 14 includes a cover body 21 formed of a heat resistant synthetic resin such as polybutylene terephthalate (PBT). The cover main body 21 has a substantially cylindrical shape that expands downward, and an upper end portion is covered with a base 12 such as an Edison type E26 type, and is fixed by an adhesive or caulking.
[0028]
  The globe 17 is transparent or light diffusing milky white or the like, and is formed of glass or a synthetic resin into a smooth curved surface that is substantially the same shape as the glass bulb of the incandescent bulb, and at the edge of the opening. As shown in FIG. 1, a fitting edge 17 a that fits inside the opening at the lower end of the cover 14 is formed. The globe 17 can be combined with another member such as a diffusion film to improve luminance uniformity, or can be omitted.
[0029]
  The lighting circuit 16 accommodated in the cover 14 includes a circuit board (PC board) 24 that is arranged horizontally, that is, perpendicularly to the longitudinal direction of the arc tube 18, and is an upper surface on both sides of the circuit board 24, that is, the base 12 side. In addition, an inverter circuit (high-frequency lighting circuit) that performs high-frequency lighting is configured by mounting a plurality of electronic components 25 and 26 on the lower surface on the arc tube 18 side. Further, an electronic component 25 such as an electrolytic capacitor and a film capacitor that are relatively heat-sensitive is disposed on the upper surface of the circuit board 24, and a chip-like shape that is relatively heat-resistant and has a small height dimension on the lower surface. The electronic component 26 is arranged. Furthermore, the circuit board 24 is formed in a substantially disk shape, a wire (not shown) is led out, and this wire is connected to the base 12 of the cover 14.
[0030]
  In the lighting circuit 16 on which a plurality of electronic components 25 and 26 are mounted, as shown in FIG. 4, a capacitor C1 constituting a filter is connected to a commercial AC power source e via a fuse F1, and this capacitor C1 constitutes a filter. The input terminal of the full-wave rectifier 27 is connected through the inductor L1. Further, a smoothing electrolytic capacitor C2 is connected to the output terminal of the full-wave rectifier 27 via a resistor R1, and an instant start type half-bridge inverter circuit 28 is connected to the electrolytic capacitor C2.
[0031]
  In the inverter circuit 28, a MOS type N-channel field effect transistor Q1 and a MOS type P-channel field effect transistor Q2, which are switching elements, are connected in series with the electrolytic capacitor C2.
[0032]
  One end of each filament FL1, FL2 of the arc tube 18 is connected between the drain and source of the field effect transistor Q2 via a ballast choke L2 and a DC cut capacitor C3, and between the other ends of the filaments FL1, FL2. Is connected to a resonant capacitor C4.
[0033]
  A starting resistor R2 constituting the starting circuit 29 is connected between the connection point of the resistor R1 and the electrolytic capacitor C2, and the gate of the field effect transistor Q1 and the gate of the field effect transistor Q2, and these field effect transistors are connected. A series circuit of a capacitor C5 and a capacitor C6 is connected between the gate of Q1 and the gate of the field effect transistor Q2 and the connection point of the field effect transistor Q1 and the field effect transistor Q2, and the capacitor C5 and the capacitor C6 of the control circuit 30 are connected. A series circuit of a Zener diode ZD1 and a Zener diode ZD2 for protecting the gates of the field effect transistor Q1 and the field effect transistor Q2 is connected in parallel to the series circuit of.
[0034]
  A secondary winding L3 is magnetically connected to the ballast choke L2, and a resonance circuit 31 of an inductor L4 and a capacitor C6 is connected to the secondary winding L3. The resistor R3 of the starting circuit 29 is connected in parallel with the series circuit of the capacitor C5 and the inductor L4. Further, a parallel circuit of the resistor R4 of the starting circuit 29 and the capacitor C7 for improving switching is connected between the drain and source of the field effect transistor Q2.
[0035]
  Incidentally, in the circuit board 24 of the lighting circuit 16, as shown in FIGS. 3 and 5A, a semicircular insertion groove 32 into which the lead wire 20 of the arc tube 18 is inserted has a constant interval on the peripheral surface thereof. The connection lands 33 are formed at four locations, and are connected to the printed circuit patterns formed on the lower surface of the circuit board 24 at the opening edges of the insertion grooves 32. Here, the printed circuit pattern is electrically connected to terminals of a plurality of mounted electronic components 25 and 26.
[0036]
  5A, the lead wire 20 is inserted into each insertion groove 32, and the lead wire 20 is fixed to the connection land 33 by soldering as shown in FIG. 5B. The lead wire 20 is tin-plated to facilitate bonding with solder. Here, the lead wire 20 has a wire diameter of 0.5 to 0.6 mm, while the opening diameter of the insertion groove 32 is set to 1 to 2 mm.
[0037]
  In FIG. 5B, reference numeral 34 denotes a soldering portion. The soldering portion 34 fills a gap between the lead wire 20 and the insertion groove 32 and protrudes from the peripheral surface of the circuit board 24. It is formed flush. An engagement recess 35 that engages with an engagement rib of a partition plate described later is formed on the peripheral surface of the circuit board 24.
[0038]
  As shown in FIGS. 1 to 3, the arc tube 18 has three tube bodies (bulbs) 36 having substantially the same shape arranged at predetermined positions and sequentially connected by a communication tube 37 to form one discharge path. In addition, an electrode having the filaments FL1, FL2, etc. is provided at the end of the discharge path, and this electrode is connected to the four lead wires 20 led out from the arc tube 18 as described above. Has been.
[0039]
  Each tube 36 has a phosphor film formed on the inner surface, and a rare gas such as argon and mercury are enclosed inside. Each tubular body 36 is, for example, a glass-made cylindrical bulb having an outer diameter of 10 mm and an inner diameter of 8 mm, that is, a wall thickness of 1 mm. It is formed in a letter shape. That is, each tubular body 36 includes a bent portion 36a that smoothly inverts and a pair of straight pipe portions 36b that are continuous with the bent portion 36a and are parallel to each other.
[0040]
  The tube body 36 is sealed at one end by a line seal using a mount or a pinch seal not using a mount, and a thin tube 38 called an exhaust pipe is welded to the other end to exhaust the exhaust. It is designed to provide amalgam as required or as required.
[0041]
  Further, the arc tube 18 is attached to a partition plate 40 which is a fluorescent lamp fixing member and a lighting circuit fixing member, and the partition plate 40 is fixed to the cover 14. And the partition plate 40 is provided with the board | substrate part 41 which makes a disk shape, and inserts the edge part of each tubular body 36 in the attachment hole 41a formed in this board | substrate part 41, and also thermosetting properties, such as a silicon type | system | group. The arc tube 18 is fixed to the partition plate 40 by bonding with an adhesive.
[0042]
  In addition, a fitting step portion 42 is formed from the outer peripheral portion of the substrate portion 41 toward the upper side and further toward the outer side. As shown in FIG. 1, the fitting step 42 is fitted inside the cover 14, and the adhesive 43 is filled between the fitting step 42 and the cover 14, so that these members Fixed to each other.
[0043]
  An annular side wall 44 having a cylindrical shape or the like is projected on the upper side of the fitting step portion 42 as shown in FIG. 3, and the circuit board 24 of the lighting circuit 16 is fitted to the annular side wall 44 by fitting or bonding. It is attached. An engagement rib 45 that engages with an engagement recess 35 formed on the circuit board 24 is formed on the annular side wall 44 so as to protrude inward. A support step 45a is formed to support the. In addition, a plurality of prismatic support ribs 46 having a predetermined height projecting inwardly protrude from the inner peripheral surface of the annular side wall 44 at predetermined intervals in the circumferential direction.
[0044]
  Furthermore, V-shaped grooves 47 that expand in a V shape upward are formed in the annular side wall 44 at four locations at regular intervals corresponding to the four insertion grooves 32 of the circuit board 24. The groove 47 is configured to elastically sandwich and temporarily hold the lead wire 20 of the arc tube 18 within the V-shaped tip, and expands upward. The wire 20 is easily inserted.
[0045]
  Since the bulb-type fluorescent lamp 10 is configured as described above, when assembling it, first, the narrow tube 38 of the arc tube 18 is first inserted into the mounting hole 41a of the partition plate 40 from below, and a tube body in the vicinity of these thin tubes 38. It fixes to the partition plate 40 with thermosetting adhesives, such as a silicone type with which it filled between 36 and the attachment hole 41a. At this time, the lead wire 20 of the arc tube 18 is tensioned to give the tension enough to lift the arc tube 18 and inserted into the nearest V-groove 47 of the partition plate 40 and held for positioning.
[0046]
  Thereby, since each lead wire 20 is hold | maintained at each V groove 47, since the arc tube 18 will be in the state suspended by each lead wire 20, the arc tube 18 is made into a thermosetting adhesive. Temporary fixing before adhering to the partition plate 40 can be performed.
[0047]
  Next, when the circuit board 24 of the lighting circuit 16 is fixed to the partition plate 40, the circuit board 24 is engaged with the engagement rib 45 when the circuit board 24 of the lighting circuit 16 is fitted inside the annular side wall 44 of the partition plate 40. The support step 45a and the plurality of support ribs 46 are placed and supported. At this time, the engagement rib 45 fits into the engagement recess 35 of the circuit board 24, thereby preventing the circuit board 24 from rattling and rotating about the axis. As a result, the workability and accuracy of the subsequent assembly work can be improved.
[0048]
  Thus, when the circuit board 24 is fixed to the partition plate 40, each V-groove 47 of the partition plate 40 is disposed in the vicinity of each insertion groove 32 of the circuit board 24, and each V-groove 47 held in each V-groove 47 is retained. After the lead wire 20 is removed from each V-groove 47, each lead wire 20 is inserted into each insertion groove 32. Then, each lead wire 20 is fixed to a connection land 33 provided at the opening edge of each insertion groove 32 by soldering as shown in FIG.
[0049]
  Then, a pair of wires (not shown) derived from the circuit board 24 is connected to the base 12 of the cover 14, the partition plate 40 is attached to the cover 14, and the globe 17 is fixed to the cover 14 by the method described above.
[0050]
  As described above, according to the present embodiment, each lead wire 20 is inserted into each insertion groove 32, and each lead wire 20 is fixed to the connection land 33 provided at the opening edge of each insertion groove 32 by soldering. As a result, a space for planting the wrapping pins on the circuit board 24 becomes unnecessary, and a space for winding the lead wire 20 around the pins becomes unnecessary, and the circuit board 24 can be miniaturized. Can do.
[0051]
  Even if the lead wire 20 is exposed to bromine gas and corroded, the lead wire 20 and the connection land 33 are fixed through the soldering portion 34, so that the electrical connection state is always maintained. In addition, the lead wire 20 can be firmly fixed to the connection land 33.
[0052]
  Further, since the connection land 33 is formed on the peripheral surface of the circuit board 24 and disposed at the opening edge of the insertion groove 32 into which the lead wire 20 is inserted, the work of fixing the lead wire 20 to the connection land 33 is performed. Workability can be improved.
[0053]
  FIG. 6 is a perspective view of a principal part showing a circuit board of a second embodiment of the light bulb shaped fluorescent lamp according to the present invention.
[0054]
  In FIG. 6, the same or corresponding parts as those in the first embodiment will be described with the same reference numerals. In each of the following embodiments, the overall configuration of the bulb-type fluorescent lamp is the same as that of the first embodiment, so that the description thereof will be omitted and only the characteristic part will be described.
[0055]
  In the present embodiment, as in the first embodiment, as shown in FIG. 6, semicircular insertion grooves 32 into which the lead wires 20 are inserted are formed in the circuit board 24, and the opening edges of these insertion grooves 32 are formed. Further, a connection land 33 that is electrically connected to the printed circuit pattern is disposed. The lead wire 20 of the arc tube 18 is inserted into the insertion groove 32, and the lead wire 20 is fixed to the connection land 33 by soldering.
[0056]
  In this case, the soldering part 34 fills the gap between the lead wire 20 and the insertion groove 32 and is formed so as to rise to the electronic component 25 side of the circuit board 24, and protrudes from the peripheral surface of the circuit board 24. It is formed flush.
[0057]
  As described above, according to the present embodiment, the soldering portion 34 is formed so as to fill the gap between the lead wire 20 and the insertion groove 32 and rise to the electronic component 25 side of the circuit board 24. The wire 20 can be firmly fixed to the connection land 33 via the soldering portion 34.
[0058]
  Further, since the soldering portion 34 is formed flush with the peripheral surface of the circuit board 24, the soldering portion 34 is fixed to the partition plate 40 when the circuit board 24 is fixed to the partition plate 40. The circuit board 24 can be securely and easily fitted into the partition plate 40 without interfering with the annular side wall 44.
[0059]
  FIGS. 7A and 7B are a perspective view and a sectional view of main parts showing a circuit board of a third embodiment of the light bulb shaped fluorescent lamp according to the present invention.
[0060]
  In the present embodiment, as shown in FIGS. 7A and 7B, attachment holes 50 are formed in the vicinity of the peripheral surface of the circuit board 24 at four positions at regular intervals, and openings of these attachment holes 50 are formed. Are provided with connection lands 51 each formed in a planar rectangular shape, and these connection lands 51 are electrically connected to printed circuit patterns formed on the lower surface of the circuit board 24, respectively.
[0061]
  On these connection lands 51, lead wires 20 are respectively fixed by soldering. In this case, the soldering of the lead wire 20 to the connection land 51 is performed on the electronic component 25 side of the circuit board 24, and the soldering portion 52 is formed on the connection land 51 on the electronic component 25 side.
[0062]
  In this embodiment, since the lead wire 20 is not positioned before soldering, the soldering operation is somewhat difficult. In this case, if a means for temporarily fixing the lead wire 20 to the connection land 51 is provided. Soldering work becomes easy. Moreover, when the mounting hole 50 of the conventional wrapping pin is drilled, if this mounting hole is diverted, it will not be newly formed.
[0063]
  Thus, according to the present embodiment, the connection land 51 is disposed on the electronic component 25 side of the circuit board 24 and the lead wire 20 is fixed to the connection land 51 by soldering. This facilitates assembly workability.
[0064]
  FIG. 8 is a front view showing a lead wire connection structure in a fourth embodiment of a light bulb shaped fluorescent lamp according to the present invention.
[0065]
  In the present embodiment, as shown in FIG. 8, the lead wire 25 a of the electronic component 25 mounted on the upper surface of the circuit board 24 connected to the lead wire 20 led out from the arc tube 18 is in advance from the lower surface of the circuit board 24. It is longer than the first embodiment, specifically, it extends downward by about 3.5 mm. The lead wire 25a and the lead wire 20 led out from the arc tube 18 are sandwiched between metal plates 55 such as a copper plate and an aluminum plate, respectively, and the metal plate 55 is caulked in this state, whereby the lead wire 25a and the lead wire 20 is fixed.
[0066]
  Here, in the electronic component 25 to which the lead wire 20 is fixed, in the case of a terminal component such as the resonant capacitor C4 of FIG. 4, the attachment portion to the circuit board 24 is formed on the lower surface of the circuit board 24 by soldering or the like. Although it is not necessary to electrically connect with the printed circuit pattern, when it is not a terminal component such as the electrolytic capacitor C2, a soldered portion 56 is provided by soldering a portion where the lead wire 25a is attached to the circuit board 24 to provide a printed circuit. It becomes necessary to electrically connect the pattern.
[0067]
  In the present embodiment, the lead wire 20 is fixed to the lead wire 25a by caulking the metal plate 55 as a connecting means. However, the present invention is not limited thereto, and the lead wire 25a and the lead wire 20 are soldered, arc-welded, or the like. You may make it fix both by the connection means by welding.
[0068]
  As described above, according to the present embodiment, the lead wire 25a of the electronic component 25 is extended long downward from the lower surface of the circuit board 24, and the lead wire 25a and the lead wire 20 are sandwiched between the metal plates 55. In this state, the metal plate 55 Since the lead wire 20 is fixed to the lead wire 25a by crimping, no processing space such as drilling or soldering for connecting the lead wire 20 to the circuit board 24 is required. Compared with the embodiment, the circuit board 24 can be remarkably miniaturized.
[0069]
  Moreover, according to this embodiment, since the lead wire 20 is only directly fixed to the lead wire 25a of the electronic component 25 by the connecting means, assembly workability can be improved. Further, since processing such as drilling in the circuit board 24 is eliminated, processing work can be reduced.
[0070]
  FIG. 9 is a front view showing a lead wire connection structure in a fifth embodiment of a light bulb shaped fluorescent lamp according to the present invention.
[0071]
  In this embodiment, as shown in FIG. 9, an insulating tube 57 formed in a cylindrical shape is attached to the lead wire 20 and the lead wire 25 a of the electronic component 25 fixed according to the fourth embodiment. Yes. For the tube 57, any one of insulating materials such as silicon-based synthetic resin, glass fiber, rubber, and PTFE is selected and has elasticity.
[0072]
  In order to attach the insulating tube 57 to the lead wire 20 and the lead wire 25a fixed by the metal plate 55, for example, a vertically split portion is formed in the insulating tube 57 in advance. After the tube 57 is expanded and the lead wire 20 and the lead wire 25a are wrapped, it is attached by returning it to a cylindrical shape by elasticity.
[0073]
  In this embodiment, instead of the insulating tube 57, an insulating tape may be wound around the lead wire 20 and the lead wire 25a. However, it is preferable to use the tube 57 from the viewpoint of workability. .
[0074]
  As described above, according to the present embodiment, since the insulating tube 57 is attached to the fixed lead wire 20 and the lead wire 25a of the electronic component 25, the adjacent lead wire 20 and the lead wire 25a are electrically connected. Therefore, it is possible to reliably insulate the light bulb without touching it, and to improve the reliability of the light bulb shaped fluorescent lamp 10.
[0075]
  FIG. 10 is a front view showing a lead wire connection structure in a sixth embodiment of a light bulb shaped fluorescent lamp according to the present invention.
[0076]
  In this embodiment, as shown in FIG. 10, the lead wire 25a of the electronic component 25 mounted on the upper surface of the circuit board 24 is longer than the lower surface of the circuit board 24 in advance from the fourth embodiment, specifically 7 It is arranged extending about 5 mm downward. Then, by wrapping the lead wire 20 led out from the arc tube 18 on the lead wire 25a, the lead wire 20 is connected to the lead wire 25a.
[0077]
  Here, the diameter of the lead wire 25a is 0.5 mm, and the diameter of the lead wire 20 is less than 0.5 mm. Further, the lead wire 20 is wrapped by about 5 mm from below the lower surface of the circuit board 24 by 1 mm.
[0078]
  Furthermore, the lead wire 25a to which the lead wire 20 is wrapped has a square cross section or a rough surface. As a result, the lead wire 20 can be tightly wound and loosening can be reduced. Then, by bending the leading end of the lead wire 25a, it is possible to prevent the wrapped lead wire 20 from dropping off.
[0079]
  In this embodiment, the lead wire 20 is wrapped around the lead wire 25a. However, if the lead wire 20 has a larger wire diameter than the lead wire 25a, the lead wire 25a is wrapped around the lead wire 20. To do. That is, from the relative relationship of strength, the larger wire diameter is defined as the wrapping side, and the smaller wire diameter is defined as the wrapping side. In this case, it is desirable that the side to be lapped has a square cross section as described above, or a rough surface.
[0080]
  Moreover, in this embodiment, it is desirable to interpose an insulating member between the lead wires 20 so that the adjacent lead wires 20 do not contact each other.
[0081]
  Thus, according to the present embodiment, the same effect as that of the fourth embodiment is obtained by wrapping one of the lead wire 20 and the lead wire 25a of the electronic component 25 and electrically connecting them. It is done.
[0082]
  11 (A), (B), (C), (D) are an enlarged front view showing a connection structure of electronic parts in a seventh embodiment of a light bulb shaped fluorescent lamp according to the present invention, a bottom view of a connection land, It is an enlarged front view which shows the connection structure of the lead wire of an electronic component, and a lead wire, and the enlarged front view which shows the other connection structure of the lead wire of an electronic component, and a lead wire.
[0083]
  In the present embodiment, as shown in FIGS. 11A and 11B, circular insertion holes 60 are formed in the circuit board 24 at four positions (only one position is shown in FIG. 11) at regular intervals. Connection lands 61 each formed in an annular shape are provided at the open ends of these insertion holes 60, and these connection lands 61 are electrically connected to printed circuit patterns formed on the lower surface of the circuit board 24, respectively. ing.
[0084]
  As shown in FIG. 11C, the lead wire 25a of the electronic component 25 is inserted from above and the lead wire 20 is inserted from below into the insertion hole 60 provided with these connection lands 61. The wire 25a and the lead wire 20 are simultaneously fixed to the connection land 61 via a soldering portion 62 by soldering. In this case, the soldering of the lead wire 25a and the lead wire 20 to the connection land 51 is performed on the lower surface side of the circuit board 24, and the solder land 62 is the connection land 61 on the electronic component 26 side opposite to the electronic component 25. Formed.
[0085]
  In this case, the lead wire 25a and the lead wire 20 are soldered to the connection land 61 on the electronic component 25 side of the circuit board 24 as shown in FIG. It may be formed on the connection land 61 on the side.
[0086]
  11C and 11D, since the lead wire 25a and the lead wire 20 are not positioned before soldering, the soldering operation is somewhat difficult. In this case, the lead wire is connected to the connection land 61. If a means for temporarily fixing 25a and the lead wire 20 is provided, the soldering operation is facilitated.
[0087]
  Thus, according to this embodiment, the lead wire 25a and the lead wire 20 of the electronic component 25 are inserted into the insertion hole 60 provided with the connection land 61, and the lead wire 25a and the lead wire 20 are simultaneously connected by soldering. Since it is fixed to the land 61, in addition to the effects of the fourth embodiment, the connection work between the lead wire 25a and the lead wire 20 becomes easy, and the lead wire 25a and the lead wire 20 are firmly fixed. be able to.
[0088]
  12A and 12B are an enlarged front view and a bottom view of a connection land showing a connection structure of electronic components in an eighth embodiment of a light bulb shaped fluorescent lamp according to the present invention.
[0089]
  In this embodiment, as shown in FIGS. 12A and 12B, rectangular through-holes 65 are formed in the circuit board 24 at four locations (only one location is shown in FIG. 12) at regular intervals. Connection lands 66 are provided at the openings of these through holes 65, and lead wire insertion holes 67 and lead wire insertion holes 68 are formed in these connection lands 66 so as to be spaced apart from each other. 66 are electrically connected to the printed circuit pattern formed on the lower surface of the circuit board 24, respectively.
[0090]
  11C, the lead wire 25a of the electronic component 25 is inserted from above into the lead wire insertion hole 67 of these connection lands 66, while the lead wire 20 from below is inserted into the lead wire insertion hole 68. As shown in FIG. Is inserted, and the lead wire 25a and the lead wire 20 are soldered to each other, whereby the lead wire 25a and the lead wire 20 are fixed to the connection land 66.
[0091]
  As described above, according to the present embodiment, the through hole 65 is formed in the circuit board 24, the connection land 66 is provided in the opening of the through hole 65, and the lead wire insertion hole 67 and the lead wire are inserted into the connection land 66. Since the holes 68 are formed so as to be separated from each other, and the lead wires 25a and the lead wires 20 are soldered to the lead wire insertion holes 67 and the lead wire insertion holes 68, they are fixed to the connection lands 66. The same effect as the form can be obtained.
[0092]
  In each of the above embodiments, the arc tube 18 is configured by connecting three U-shaped tube bodies 36. However, the shape of the arc tube 18 is not limited to this, for example, a U-shaped or H-shaped tube. It is also possible to shorten the lamp length by arranging two, three, or four bodies in parallel, that is, forming a 4-axis, 6-axis, or 8-axis discharge path along the longitudinal direction.
[0093]
  In the lighting circuit 16, one circuit board 24 is horizontally arranged, but a plurality of circuit boards may be provided.
[0094]
【The invention's effect】
  As described above, according to the light bulb shaped fluorescent lamp of the first aspect, the lead wire of the arc tube is fixed to the connection land provided on the circuit board and electrically connected, so that it is used for wrapping on the circuit board. This eliminates the need for a space for planting the pins, and also eliminates the space for winding the lead wire around the pins, thereby reducing the size of the circuit board. As a result, it is possible to reduce the size of the bulb-type fluorescent lamp. In addition, even if the lead wire is corroded by being exposed to the bromine gas generated, the lead wire and the connection land are firmly fixed, so that the electrical connection state can always be maintained. Reliability can be improved.
[0095]
  Also,Since the connection land is formed on the peripheral surface of the circuit board and disposed at the opening edge of the insertion groove into which the lead wire is inserted, the workability of the work of fixing the lead wire to the connection land can be improved. .
[0096]
  Claim 2According to this bulb-type fluorescent lamp, since the lead wire is inserted into the insertion groove and fixed to the connection land by soldering, the lead wire can be firmly fixed to the connection land. Even if the lead wire is corroded by the generated bromine gas and corroded, the lead wire and the connection land are fixed by soldering, so that the electrical connection state can always be maintained.
[0097]
  Furthermore, since the connection land is formed on the peripheral surface of the circuit board and disposed at the opening edge of the insertion groove into which the lead wire is inserted, the workability of the work of fixing the lead wire to the connection land is improved. Can do.
[0098]
  Claim 3According to the light bulb shaped fluorescent lamp, since the lead wire and the lead wire of the electronic component are inserted into the circuit board from the insertion hole and electrically connected to each other, the connection work between the lead wire and the lead wire is performed. In addition to being easy, the lead wire and the lead wire can be firmly fixed.
[Brief description of the drawings]
FIG. 1 is a partial sectional view showing a first embodiment of a bulb-type fluorescent lamp according to the present invention.
FIG. 2 is a side view of the bulb-type fluorescent lamp of FIG.
3 is an exploded perspective view showing a part of the bulb-type fluorescent lamp of FIG. 1. FIG.
4 is a circuit diagram showing a lighting circuit of the light bulb shaped fluorescent lamp of FIG. 1. FIG.
5 (A) and 5 (B) are a perspective view and a cross-sectional view of relevant parts showing a circuit board of a lighting circuit of the bulb-type fluorescent lamp of FIG.
FIG. 6 is a perspective view showing a main part of a circuit board of a second embodiment of a light bulb shaped fluorescent lamp according to the present invention.
FIGS. 7A and 7B are a perspective view and a cross-sectional view of relevant parts showing a circuit board of a third embodiment of a light bulb shaped fluorescent lamp according to the present invention.
FIG. 8 is a front view showing a lead wire connection structure in a fourth embodiment of a light bulb shaped fluorescent lamp according to the present invention.
FIG. 9 is a front view showing a lead wire connection structure in a fifth embodiment of a light bulb shaped fluorescent lamp according to the present invention;
FIG. 10 is a front view showing a lead wire connection structure in a sixth embodiment of a light bulb shaped fluorescent lamp according to the present invention;
11 (A), (B), (C), and (D) are enlarged front views showing a connection structure of electronic components in a seventh embodiment of a light bulb shaped fluorescent lamp according to the present invention, and bottom surfaces of connection lands. The enlarged front view which shows the connection structure of the figure, the lead wire of an electronic component, and a lead wire, The enlarged front view which shows the other connection structure of the lead wire of an electronic component, and a lead wire.
FIGS. 12A and 12B are an enlarged front view and a bottom view of a connection land showing a connection structure of electronic components in an eighth embodiment of a light bulb shaped fluorescent lamp according to the present invention.
[Explanation of symbols]
10 Bulb-type fluorescent lamp
12 base
14 Cover
16 lighting circuit
17 Globe
18 arc tube
20 Lead wire
24 Circuit board
25 Electronic components
26 Electronic components
32 Insertion groove
33 connection land
34 Soldering part
36 Tube (valve)

Claims (3)

A cover having a base;
An arc tube having a bulb formed by pulling out a lead wire to the outside;
A lighting circuit having a circuit board that is housed in a cover and on which an electronic component is mounted and a connection land to which a lead wire is fixed and electrically connected;
A partition plate fixed to the cover while fixing the arc tube and the circuit board;
Comprising
The connection land is formed on the peripheral surface of the circuit board and disposed at the opening edge of the insertion groove into which the lead wire is inserted . 2. The bulb-type fluorescent lamp according to claim 1 , wherein the lead wire is inserted into the insertion groove and fixed to the connection land by soldering. A cover having a base;
An arc tube having a bulb formed by pulling out a lead wire to the outside;
A lighting circuit having a circuit board which is housed in a cover and on which an electronic component is mounted and which is provided with a connection land for electrically connecting the lead wire and the lead wire of the electronic component through insertion holes;
A partition plate fixed to the cover while fixing the arc tube and the circuit board;
A bulb-type fluorescent lamp characterized by comprising:

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