JP2003217311A - Bulb shaped fluorescent lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bulb shaped fluorescent lamp requiring no lead wire positioning and no forming when assembling it, and easy to mount a base. <P>SOLUTION: Since assembling is carried out with a base 2 electrically connected to a lighting device 3, troubles such as short-circuiting the lead wires caused by the forming for positioning the lead wires is prevented, and the assembling is simplified to enhance production and work efficiency. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a bulb-type fluorescent lamp.

[0002]

2. Description of the Related Art A compact fluorescent lamp comprises a curved fluorescent lamp and a case body, and a lighting device for lighting the fluorescent lamp is housed in a cover body to which the curved fluorescent lamp is attached. Has been done. A base having an eyelet portion and a shell portion is screwed into one end of the case body on the non-fluorescent lamp side.

In the lighting device, two lead wires are connected as a power input line. This lead wire is disclosed in Japanese Patent Laid-Open No. 2000-
As described in Japanese Patent No. 48633, one is led out from a through hole provided in the eyelet portion of the base, electrically connected to the outside of the eyelet portion by plasma arc welding, etc., and the other is led out of the case. , And is electrically connected by being sandwiched by the inner surface of the shell portion.

[0004]

However, in the above conventional light bulb type fluorescent lamp, when the lead wire connected to the lighting device is connected to the base during assembly, the lead wire is moved outward from the base mounting portion of the cover body. In order to connect the base to the eyelet and the shell of the base, it is necessary to perform forming work such as positioning, and the work of attaching the base is complicated.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a light bulb type fluorescent lamp in which the work of attaching a base is easy and the work of positioning lead wires or forming work is not required during assembly. .

[0006]

A compact fluorescent lamp according to claim 1 has a bent fluorescent lamp; a cover body to which the fluorescent lamp is attached; and a circuit board on which a plurality of electronic components are mounted. A lighting device disposed inside the cover so as to light the fluorescent lamp; a base end connected to a circuit board of the lighting device and disposed inside the cover, and integrally formed with the base end. A base having a shell portion protruding from the non-fluorescent lamp side of the cover body and an eyelet portion attached to the shell portion via an insulating portion;
It is characterized by having.

In the case of a fluorescent lamp in which one straight tube bulb is bent in a U shape, the bent portion may have a semicircular shape or a U shape. Further, the bent portions may be formed by connecting adjacent ends of two straight pipe valves with a connecting pipe.

The connection between the base and the circuit board is not limited in connection method, shape, material, etc. as long as it has a function as a power input line and has good thermal conductivity. Further, the base end portion of the base body and the lighting device may be only electrically connected, but even if stress is applied to the connection portion from the base such as when mounting a light bulb type fluorescent lamp, the connection portion is The base end may be mechanically fixed to the circuit board, the cover body, the holder, or the like so as not to be damaged. That is, the base end and the circuit board are connected electrically and mechanically,
It may support the base body.

According to the bulb-type fluorescent lamp of the first aspect, since the base end portion of the base body is connected to the circuit board,
Positioning of the lead wire or forming work is not required at the time of assembling, which improves the assembling workability.

According to a second aspect of the present invention, in the light bulb type fluorescent lamp according to the first aspect, the base end portion of the base body is formed so as to surround at least a part of electronic components of the lighting device. It is characterized in that the base end portion is filled with a thermally conductive substance so as to come into contact with the electronic components surrounded by the inner wall and the base end portion, respectively.

The heat conductive material utilizes the viscosity before curing to cover at least a part of the plurality of electronic components of the lighting device and to contact the inner surface of the base end portion of the lighting device closer to the base than the circuit board. Is filled to do. The heat conductive material absorbs heat generated by the electronic component and conducts the heat to the shell portion of the base body exposed outside. When a heat conductive material is coated on an electronic component, a tentative effect can be obtained even if a part of the electronic component is in contact with the heat conductive substance. However, considering the heat absorption efficiency, most of the component (lead wire It is preferable that the heat conductive material is used to cover the heat conductive material (excluding portions not directly related to heat generation).

The electronic parts coated with the heat conductive material naturally include electronic parts having a high heat generation temperature, but may cover electronic parts having a low heat resistant temperature. This is because the thermally conductive substance can be expected to play a role of thermal protection.

The heat conductive material may be filled so that at least a part of the plurality of electronic components and the base body are in contact with each other, but between the base body and the cover body, that is, the outer wall and the inner wall of the base end portion, and It may be in contact with the electronic component.

According to the light bulb type fluorescent lamp of the present invention, the heat conductive substance is in contact with the electronic components mounted in the base end portion and the lighting device, so that the heat generated by the electronic component is transferred to the heat conductive substance. And, it becomes possible to efficiently radiate heat to the outside through the base body and suppress the temperature rise in the cover body.

According to a third aspect of the present invention, the bulb-type fluorescent lamp is characterized in that the heat conductive substance according to the second aspect is a silicone resin.

According to the self-ballasted fluorescent lamp of the third aspect, in addition to the effect of the second aspect, the heat conductive material is a highly versatile silicone resin, so that the heat conductivity is good and the manufacturing cost is low. It becomes possible to do.

A lighting fixture according to a fourth aspect of the present invention includes the light bulb shaped fluorescent lamp according to any one of the first to third aspects; and a fixture main body to which the light bulb shaped fluorescent lamp is mounted. It is a thing.

According to the lighting equipment of claim 4 of the present invention,
It is possible to provide a lighting fixture equipped with the light bulb shaped fluorescent lamp having the action of the invention according to any one of claims 1 to 3.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded view showing a first embodiment of the light bulb type fluorescent lamp of the present invention, and FIG. 2 is a partially enlarged sectional view of the light bulb type fluorescent lamp of FIG.

The cover 1 of the bulb-type fluorescent lamp is made of a heat-resistant synthetic resin such as polybutylene terephthalate (PB).
T) and has a substantially bowl-shaped rotating body shape having a first opening 1a on the upper side and a second opening 1b extending on the lower side. First opening 1a of cover body 1
Is formed to be slightly larger than the outer diameter of the shell portion 2a of the base body 2. Further, on the inner surface inside the second opening 1b, a plurality of engaging recesses 1c are formed over the periphery thereof.

The base body 2 has a substantially cylindrical shell portion 2a forming a screw portion and an eyelet portion 2b located at the top of the shell portion 2a and fixed by pouring and fixing an eyelet glass as an insulator. There is. This shell part 2a
The eyelet 2b and the eyelet 2b constitute a power supply terminal for supplying electric power to the lighting device 3. The eyelet 2b is mainly made of a metal such as Ni-plated brass or aluminum, and the lead wire 3a is connected to the center hole of the eyelet 2b. And plasma arc welding.

A base end portion 2c extending in a divergent manner toward the lower end of the base body 2 is formed integrally with the shell portion 2a. Around the opening of the base end portion 2c extending from the shell portion 2a, several pin-shaped protrusion portions 2d for attaching to the circuit board are formed. An injection hole 2e for injecting a silicone resin, which is a heat conductive material, is formed near the shell portion 2a of the base end portion 2c.

The holder 4 attached to the second opening 1b of the cover body 1 is formed of a heat-resistant synthetic resin such as PBT resin into a substantially disc shape. Several mounting holes 4a for mounting a plurality of fluorescent lamps are formed on the disc surface of the holder. Further, a side wall is formed from the disc surface at the peripheral edge of the holder 3. Further, a plurality of engagement claws 4b that engage and fix with the engagement recesses 1c on the inner surface of the cover body 1 are formed on the upper end side wall of the holder 3.

The fluorescent lamp 5 is constructed by joining four bending bulbs 5a. The top of each bending valve 5a is
It is smoothly bent into a U-shape in the middle part and is arranged at equal intervals on the circumference centered on the central axis whose longitudinal direction is the vertical direction of the bulb-type fluorescent lamp, and the straight pipe part of each bulb 5a. Is also configured to be arranged at equal intervals on the circumference centered on the central axis of the bulb-shaped fluorescent lamp. That is,
The bent portion of each bending valve 5a is arranged corresponding to each side of the substantially quadrangular shape. A phosphor layer is formed on the inner surface of each bending bulb 5a, and a rare gas such as argon and mercury are enclosed as an enclosure gas in the bulb 5a.
Each of the four bulbs 5a has one continuous discharge path formed by a communication pipe 5b connecting the bulbs 5a. A pair of electrodes is sealed at the ends of the fluorescent lamp located at both ends of the discharge path.

From the pair of electrodes, two lead wires 4c each, two lead wires 4c, are led out from each end of the valve 5a.
The fluorescent lamp 5 is connected to the circuit board 3b by lapping the pins or the like provided on the circuit board 3b.

The end of the bulb 5a of the fluorescent lamp 5 is the holder 4
Are inserted into the lamp mounting holes 4a formed in the respective parts, and the end portion of the bulb 5a and the lamp mounting hole 4a are bonded and fixed with silicone resin or the like. As a result, the fluorescent lamp 5 is supported by the holder 4.

The lighting device 3 is arranged on the side of the holder 4 on which the fluorescent lamp 5 is not mounted. The lighting device 3 includes a disc-shaped circuit board 3b arranged on a parallel surface orthogonal to the longitudinal direction of the fluorescent lamp 5, and a plurality of circuit boards 3b are provided on both surfaces of the circuit board 3b, that is, on the upper surface of the base 2 side. The electronic component 3c is mounted to form an inverter circuit that performs high frequency lighting. Components such as electrolytic capacitors and film capacitors, which have relatively weak heat resistance, are also mounted on the plurality of electronic components 3c. A resonance inductor is arranged in the center of the circuit board 3b, and an electrolytic capacitor is arranged above the resonance inductor. Further, the protrusions 2d of the plurality of cap bodies 2 are provided on the circumference surrounding the plurality of electronic components 3c.
Is formed with a mounting hole 3d. Since a wiring pattern is printed on the lower surface of the circuit board in the vicinity of the mounting hole 3d, the protrusion 2d of the base 2 is attached to the mounting hole 3d.
2d, and the protruding portion 2d is protruded from the lower surface from which the protruding portion 2d protrudes.
The shell shell 2a by connecting the
And the circuit board 3b are electrically connected.

On the lower surface of the circuit board 3b, a chip-shaped REC (rectifier, rectifying element, diode bridge), transistor, resistor, or other package having a relatively high heat resistance, a large amount of heat generation, and a small thickness is formed. Parts having a thickness of about 2 to 3 mm are mounted.

Lead wire 3a derived from the circuit board 3.
Is wired between the cylindrical shell portion 2a and the electrolytic capacitor and connected to the eyelet portion 2b.

Silicone resin 7 as a thermally conductive substance
Is a silicone resin filling nozzle inside the base body 2 so as to cover the electronic component 3c from the upper end of the electronic component 3c mounted on the lighting device 3 through the injection hole 2a formed near the shell portion 2a of the base end portion 2d. To fill.

Next, a process of assembling the bulb-type fluorescent lamp of this embodiment will be described. First, the protrusion 2d of the base end 2c of the base 2 is inserted into the opening 3d on the circuit board 3b, and the base 2 is attached to the circuit board 3b. At that time, the circuit board 3
The lead wire 3a wired in b is led out to the eyelet portion 2b and connected. Then, the holder 4 to which the fluorescent lamp 5 is attached is prepared, and the circuit board 3b is attached to the non-fluorescent lamp side of the holder 4. After that, the silicone resin 7 having better thermal conductivity than the injection hole 2e formed in the die body 2 and having fluidity before curing is filled, and at the same time, the die body 2 is filled.
Touch the inner surface. The method of injecting the silicone resin 7 is not limited as long as the silicone resin 7 can be reliably brought into contact with the electronic component 3c and the base body 2. The silicone resin 7 may be filled before the circuit board 3b is attached to the holder 4.

The base body 2 attached to the circuit board 3b includes:
The cover body 1 is attached. As a result, the shell portion 2a and the eyelet portion 2b of the base body 2 penetrate through the first opening 1a of the cover body 1. At this time, the side of the holder 3 on which the fluorescent lamp 5 is not mounted is inserted inside the second opening 1b of the cover body 1, so that the plurality of engaging recesses 1c in the cover body 1 are inserted.
And the engaging claw 4b formed on the holder 4 are fitted and fixed.
By performing the assembly in this way, the shell 2a portion of the base body 2 is inserted and fixed from the first opening 1a of the cover body 1.

Finally, the peripheral edge portion of the inner surface of the lower end of the cover body 1 and the peripheral edge portion of the opening of the globe 6 are bonded and fixed by an adhesive such as silicone resin.

Although the bulb-type fluorescent lamp of the above embodiment has the globe 6 for covering the fluorescent lamp 5, the globe 6 may not be provided.

As for the shape of the base end 2c of the base body 2, the shape of the protruding portion 2d at the base end may be adopted as long as it has means for integrally supplying with the shell portion 2a and supplying electric power to the circuit board 3b. The connection method is not limited to this. The shape of the base end portion 2c is not limited to this as long as the electronic component 3c on the circuit board 3b and the inside of the base end portion 2c can be contacted with the silicone resin 7.

With the above structure, when the lighting device 3 of the compact fluorescent lamp is powered on, a starting voltage is applied between the pair of electrodes of the fluorescent lamp 5 by the lighting device 3 to discharge the fluorescent lamp 5. It starts and the bulb-shaped fluorescent lamp lights up.

As described above, while the light bulb type fluorescent lamp is lit, the lighting device 3 generates heat and the temperatures of the cover body 1 and the base body 2 that are compactly housed rise to some extent, but the silicone resin has good thermal conductivity. 7 is efficiently radiated to the outside through the metal cap body 2 and the cover body 1.

Since the bulb-type fluorescent lamp of this embodiment is assembled in a state where the base body 2 and the lighting device 3 are electrically connected to each other, there is a problem such as a short circuit of the lead wire due to the lead wire positioning forming work. And the assembling work is simplified to improve the production efficiency and work efficiency. Since the step of pulling out the lead wire for a long time and cutting off the extra portion is not necessary, the cost can be reduced by further reducing the amount of material used. Further, since the caulking process at the time of attaching the mouthpiece is not necessary, the deformation of the screw portion due to the assembling work and the caulking are insufficient and the caulking does not come loose. Further, by efficiently radiating the heat generated from the electronic component 3c to the outside, it is possible to provide the highly reliable lighting device 3. As a result, it is possible to provide a self-ballasted fluorescent lamp having improved commercial characteristics and improved work efficiency by improving life characteristics.

Although the heat conductive material 7 that comes into contact with the electronic components of the lighting device 3 is filled in the base end portion 2c of the base body 2, the outside of the base end portion 2c and the inside of the cover pair 1 are further arranged. It may be filled between and. By thus filling the inside and outside of the base end portion 2c of the base body 2 with the heat conductive material, the heat dissipation effect of the lighting device 3 can be further improved.

Next, a lighting equipment according to a second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a schematic sectional view showing an embodiment of the lighting fixture of the present invention. In the figure, 31 is the bulb-type fluorescent lamp of the first embodiment, and 30 is the embedded luminaire main body. The instrument main body 30 includes a base 32, a reflection plate 33, and the like.

[0042]

According to the first aspect of the present invention, since the base end portion of the cap body is connected to the circuit board, the lead wire positioning or forming work is not required at the time of assembly, and the assembling workability is improved. A compact fluorescent lamp can be provided.

According to the second aspect of the present invention, since the heat conductive substance is in contact with the electronic parts mounted in the base end portion and the lighting device, the heat generated by the electronic parts is generated by the heat conductive substance and the base body. It is possible to provide the bulb-type fluorescent lamp according to claim 1, which makes it possible to efficiently dissipate heat to the outside through the cover and suppress an increase in temperature inside the cover body.

According to the invention of claim 3, in addition to the effect of claim 1 or 2, the heat conductive material is a highly versatile silicone resin, so that the heat conductivity is good and the manufacturing cost is low. It is possible to use a bulb-type fluorescent lamp capable of

According to the fourth aspect of the present invention, it is possible to provide a lighting fixture equipped with the bulb-type fluorescent lamp having the action of the first aspect of the present invention.

[Brief description of drawings]

FIG. 1 is an assembled perspective view showing an embodiment of a light bulb type fluorescent lamp of the present embodiment.

FIG. 2 is a partially enlarged sectional view of the bulb-type fluorescent lamp of FIG.

FIG. 3 is a partial side sectional view showing an embodiment of the lighting fixture of the present embodiment.

[Explanation of symbols]

1 ... Cover body, 2 ... Base body, 3 ... Lighting device, 4 ... Holder, 5 ... Fluorescent lamp, 6 ... Globe

Claims (4)

[Claims] 1. A bent fluorescent lamp; a cover body to which the fluorescent lamp is attached; and a circuit board on which a plurality of electronic components are mounted, and the fluorescent lamp is arranged in the cover body so as to light the fluorescent lamp. A lighting device; a base end connected to a circuit board of the lighting device and disposed in the cover body; a shell part integrally formed with the base end projecting from the non-fluorescent lamp side and the shell; And a base body having an eyelet part attached to the part via an insulating part; and a bulb-shaped fluorescent lamp. 2. A base end portion of the base body is formed so as to surround at least a part of electronic parts of the lighting device, and the inner wall of the base end part and the electronic parts surrounded by the base end part are in contact with each other. The bulb-shaped fluorescent lamp according to claim 1, wherein the base end portion is filled with a heat conductive substance. 3. The bulb-type fluorescent lamp according to claim 2, wherein the thermally conductive substance is a silicone resin. 4. A lighting fixture, comprising: the light bulb shaped fluorescent lamp according to claim 1; and a fixture body to which the light bulb shaped fluorescent lamp is mounted.