JPH08273615A - Fluorescent lamp apparatus - Google Patents

Abstract

PURPOSE: To prevent contact resistance from increasing by maintaining winding force of an outer lead wire on a connection terminal. CONSTITUTION: A fluorescent lamp 21 and a lighting circuit 12 are housed in an outer casing 38 having a cap 3. As for the fluorescent lamp 21, an outer lead wire 22 connected with a filament electrode 28 is led out of the end part of the glass bulb 25. The outer lead wire 22 has a core wire made of iron. The lighting circuit 12 has a connection terminal 15 on which the outer lead wire 22 of the fluorescent lamp 21 is coiled and with which the wire 22 is connected. Consequently, due to the heat at the time of lighting of the fluorescent lamp 21, the core wire made of iron of the outer lead wire 22 coiled on the connection terminal 15 is heated and hardened and thus the coiling force of the outer lead wire 22 on the connection terminal 15 can be maintained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorescent lamp device using a fluorescent lamp.

[0002]

2. Description of the Related Art As a fluorescent lamp device, there is a light bulb type which uses a fluorescent lamp which is bent in an H shape or a saddle shape to form one meandering discharge path.

Such a light bulb type fluorescent lamp device is, for example, as disclosed in Japanese Patent Laid-Open No. 6-139997, a synthetic resin cover having a base and a transparent synthetic resin fixed to the cover. An envelope is formed from a globe made of resin, and a holder holding a fluorescent lamp and a lighting device is accommodated in the envelope.

The fluorescent lamp is composed of a glass bulb forming an airtight discharge space, a pair of filament electrodes sealed at both ends of the glass bulb, a rare gas enclosed in the glass bulb, and a fluorescent light formed on the inner surface of the glass bulb. The body has an external lead wire made of copper wire connected to each filament electrode and led out from the end of the glass bulb.

When the fluorescent lamp device is assembled, the external lead wires of the fluorescent lamp are wound around the connection terminals of the lighting circuit and electrically and mechanically connected.

[0006]

However, in the conventional fluorescent lamp device, the external lead wire made of a copper wire is wound around the connection terminal for electrical and mechanical connection, but the fluorescent lamp is turned on and off. Due to the temperature cycle of high temperature and normal temperature, there is a problem that the winding force of the external lead wire around the connection terminal is reduced and the contact resistance is increased.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a fluorescent lamp device capable of maintaining a winding force of an external lead wire around a connection terminal and preventing an increase in contact resistance.

[0008]

A fluorescent lamp device according to claim 1; a cover having a base; a glass bulb attached to the cover to form an airtight discharge space; and a pair of glass bulbs sealed at both ends. Of the filament electrode, the rare gas enclosed in the glass bulb, the phosphor formed on the inner surface of the glass bulb, and the external lead wire having the iron core wire connected to each filament electrode and led out from the end of the glass bulb. And a lighting circuit having a connection terminal around which an external lead wire of the fluorescent lamp is wound and connected, and a lighting circuit connected between the base of the envelope and the fluorescent lamp. .

A fluorescent lamp device according to a second aspect is the fluorescent lamp device according to the first aspect, wherein the diameter of the external lead wire is 0.1 to 0.5 mm.

A fluorescent lamp device according to a third aspect of the present invention is the fluorescent lamp device according to the first or second aspect, wherein the external lead wire has a core wire coated with copper.

A fluorescent lamp device according to a fourth aspect is the fluorescent lamp device according to any one of the first to third aspects,
The lighting device is for lighting a fluorescent lamp at a high frequency.

A fluorescent lamp device according to a fifth aspect is the fluorescent lamp device according to any one of the first to fourth aspects,
A globe having at least a part having a light-transmitting property, which accommodates the glass bulb, is attached to the cover, and the globe and the cover form a substantially sealed envelope. The term “substantially closed type” also includes a case having a vent hole.

A fluorescent lamp device according to a sixth aspect is the fluorescent lamp device according to any one of the first to fifth aspects,
Input power per unit volume of envelope is 0.025W / c
It is set to m ³ or more.

[0014]

In the fluorescent lamp device according to the present invention, the iron core wire of the external lead wire wound around the connection terminal is heated and hardened by the heat of the fluorescent lamp, and the winding force of the external lead wire around the connection terminal is maintained. To be done.

According to the fluorescent lamp device of the second aspect, in addition to the function of the fluorescent lamp device of the first aspect, a desired winding force can be obtained even when the wire diameter of the external lead wire is 0.1 to 0.5 mm. To be

In the fluorescent lamp device according to claim 3, in addition to the function of the fluorescent lamp device according to claim 1 or 2, by using an external lead wire having a core wire coated with copper,
The electrical conductivity is improved.

In the fluorescent lamp device according to claim 4, in addition to the function of the fluorescent lamp device according to any one of claims 1 to 3, when the fluorescent lamp is lit at a high frequency, the temperature becomes high.
The winding force of the external lead wire is effectively increased.

In the fluorescent lamp device according to the fifth aspect, in addition to the function of the fluorescent lamp device according to any one of the first to fourth aspects, the inside temperature becomes high due to the substantially enclosed envelope, and the external lead wire is provided. The wrapping power of is effectively increased.

In the fluorescent lamp device according to the sixth aspect, in addition to the operation of the fluorescent lamp device according to any one of the first to fifth aspects, the input power per unit volume of the envelope is 0.02.
By setting it to 5 W / cm ³ or more,
It is set to a temperature at which the winding force of the external lead wire is effectively increased.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of an embodiment of the fluorescent lamp device of the present invention will be described below with reference to the drawings.

1 to 3 show a light bulb type fluorescent lamp device as a first embodiment. FIG. 1 is a cross-sectional view of a light bulb type fluorescent lamp device, FIG. 2 is a perspective view of a light bulb type fluorescent lamp device in an exploded state, and FIG. 3 is a partial schematic cross-sectional view.

In FIG. 1, reference numeral 1 denotes a cover, which is made of heat-resistant synthetic resin such as PBT resin, and a cylindrical portion 2 is integrally formed at one end of the cover 1. A screw-type mouthpiece 3 such as an Edison type E26 type is attached to 2 and the mouthpiece 3 is fixed to the cylindrical portion 2 by an adhesive or caulking.

The other end of the cover 1 is closed by a partition plate 4, which is made of a heat-resistant synthetic resin such as PBT resin and has a substantially circular dish shape. Further, as shown in FIG. 2, the partition plate 4 has a flange portion 6 at the upper end opening edge of the side wall 5 having a rising shape.
Are formed on the flange portion 6. For example, four locking tongue pieces 7 are formed on the flange portion 6 so as to be spaced apart from each other in the circumferential direction. The locking tongues 7 are formed so as to divide the flange portion 6 in the circumferential direction by the slits 8 formed in the flange portion 6. Therefore, the locking tongues 7 can be elastically deformed in the radial direction.

Further, the inner surface of the cover 1 corresponds to these locking tongues 7 and locking projections 9 for locking these locking tongues 7.
Are integrally formed. That is, when the cover 1 and the partition plate 4 are butted against each other, the locking tongue piece 7 is elastically deformed to get over the locking projection 9, and the cover 1 and the partition plate 4 are locked to each other.
And the locking projection 9 are engaged with each other.

A fixed claw is provided on the flange portion 6 of the partition plate 4.
11 and 11 are formed, and another fixed claw 11 is formed upright from the bottom wall at another position of the partition plate 4. The fixed claw 11 has an inverter circuit 12 as a lighting circuit.
The printed circuit board 13 of is locked.

Further, the inverter circuit 12 is located in the space covered by the cover 1 and is attached to the partition plate 4. The inverter circuit 12 is for high frequency lighting using a transistor inverter on the circuit board 13. The circuit component 14 is mounted.

Further, at one end of the printed circuit board 13,
Four pin-shaped connection terminals 15 are provided so as to project, and these connection terminals 15 are electrically connected to the circuit component 14, and the external lead wire 22 of the saddle-shaped fluorescent lamp 21 is wound around the connection terminals 15. Electrically and mechanically connected. The fluorescent lamp 21 may be U-shaped or W-shaped.

On the lower surface of the partition plate 4, lamp mounting cylinder portions 23, 23 as holding portions are integrally formed. A fluorescent lamp 21 is attached to the lamp mounting cylinder portions 23, 23, and the fluorescent lamp 21 consumes power of 15 W to 1 W.
At 7W, the lamp current is 250mA to 350mA. The brightness is about 60 W of incandescent lamp.

In the fluorescent lamp 21, both ends 26, 26 of a glass bulb 25, in which a phosphor film (not shown) is formed on the inner surface and a rare gas such as mercury and argon is enclosed, are arranged in close proximity to each other, and a base is provided. A central bent portion that is positioned in three directions and is bent in a U shape between these two end portions 26, 26.
The center bent portion 27 is formed to be bent in the same direction as the both end portions 26, 26.

Electrode coils 28, 28 as filament electrodes are sealed at both ends 26, 26 of the glass bulb 25, and auxiliary amalgams 29, 29 are attached to these electrode coils 28, 28, respectively.

A pair of external lead wires 22, 22 connected to the electrode coils 28, 28 are led to the outside from the ends 26, 26 of the glass bulb 25, respectively, and wound around the connection terminals 15, 15 a plurality of times. Connected by turning. The external lead wire 22 is composed of a CP wire (CXF, CCS, etc.) in which an iron core wire is plated with copper, and is connected to the electrode coil 28 and is attached to the glass bulb 25 at the outer end of a rivet (not shown). It is connected by electric resistance welding.

Further, thin tubes 31, 31 project from both ends 26, 26 of the glass bulb 25, and at least one of these thin tubes 31, 31 contains an amalgam 32 for controlling the mercury vapor pressure during lighting. ing.

The fluorescent lamp 21 is inserted from below the partition plate 4 into the lamp mounting tube portions 23, 23 having both ends 26, 26 formed on the partition plate 4, and these end portions 26, 26 and the lamp mounting It is fixed to the partition plate 4 by a thermosetting adhesive 33 such as a silicone-based material filled between the cylindrical portions 23. The central bent portion 27 of the fluorescent lamp 21 is joined to the lower surface of the partition plate 4 by a thermosetting adhesive 34 such as silicone. For this reason, the fluorescent lamp 21 is fixed to the partition plate 4 at a total of three positions, that is, both end portions 26, 26 and the central bent portion 27.

The fluorescent lamp 21 is covered with a light-transmitting globe 35, and the globe 35 has a cup shape with an open upper end. The globe 35 is made of a transparent or light-diffusing synthetic resin, and the globe 35 has a straight neck portion 36 having a slightly smaller upper end opening. Further, a meat reservoir 37 is formed continuously over the entire circumference at the open end of the neck 36.
Reference numeral 37 denotes a meat reservoir in which the melted meat is collected by heating and softening the upper end opening of the globe 35.

The cover 1 and the globe 35 form a substantially hermetically sealed envelope 38. The substantially closed type may have a vent hole.

As shown in FIGS. 1 and 3, the neck portion 36 of the globe 35 is inserted into a ring-shaped gap formed between the inner surface of the cover 1 and the rising side wall 5 of the partition plate 4. On the outer surface of the neck portion 36 of the glove 35, ribs 41 having a triangular cross section, which are projected from four locations on the inner surface of the cover 1.
, And ribs 42 having a triangular cross section, which project from four positions on the outer surface of the rising side wall 5 of the partition plate 4, contact the inner surface of the rib 42.
The neck portion 36 of the globe 35 is positioned and held at a predetermined position in a point contact state between the ribs 41 and 42.

The globe 35 is joined to both the inner surface of the cover 1 and the rising side wall 5 of the partition plate 4 with a thermosetting adhesive 43 such as silicone. In addition,
The thermosetting adhesive 43 is thermosetting, and is made of silicone, for example, and has a hardness of 20 or more and 5 at the time of curing.
In the case of the silicone type, the hardness can be changed by adjusting the mixing ratio of the curing agent mixed with the silicone.

Further, as shown in FIG. 1, a gap is formed between the end of the cover 1 into which the globe 35 is fitted and the peripheral surface of the globe 35.

The size of the envelope 38 composed of the cover 1 and the globe 35 is 52 so that the input power per unit volume of the envelope 38 is 0.025 W / cm ³ or more.
It is about 0 cm ³ , and is set to 600 cm ³ or less when the input power is 18 W / cm ³ .

When the fluorescent lamp 21 is turned on by using the inverter circuit 12, the amount of ultraviolet rays due to the increase in the tube wall load cannot be neglected. Therefore, the synthetic resin surface facing the inside of the envelope 38, that is, the inner surface of the globe 35, the partition A protective film 45 made of an inorganic material is formed on the surface of the plate 4, the inner surface of the cover 1, and the like. As the inorganic material, for example, an inorganic polymer perhydropolysilazane is used. And the protective film 45
Is formed by applying low temperature firing type perhydropolysilazane to the surface of the synthetic resin and then firing at low temperature to obtain SiO2.
_{A 2} system ceramics film is formed. By using this low-temperature baked perhydropolysilazane, it can be applied to synthetic resins such as PET, polycarbonate, and polyarylate.

As described above, by forming the protective film 45 on the surface of the synthetic resin facing the envelope 38, ultraviolet rays of 370 nm or less can be reflected and cut, and deterioration of the surface of the synthetic resin can be prevented. Moreover, by forming the protective film 45 on the globe 35, it is possible to reduce the irradiation amount of ultraviolet rays from the fluorescent lamp device and irradiate visible light mainly.

Next, the operation of the first embodiment will be described.

First, the order of assembling the fluorescent lamp device will be described.

The printed circuit board 13 on which the circuit component 14 for high frequency lighting is previously mounted is locked to the upper surface of the partition plate 4 via the fixing claw 11.

The end portions 26, 26 of the fluorescent lamp 21 are inserted into the lamp mounting tube portions 23, 23 formed on the partition plate 4, and the end portions 26, 26 of the glass bulb 25 and the lamp mounting tube portions 23, 23 are thermoset. The adhesive 33 is used for fixing. Further, the central bent portion 27 of the glass bulb 25 is joined to the lower surface of the partition plate 4 with a thermosetting adhesive 33. By doing so, the fluorescent lamp 21 is fixed by the thermosetting adhesive 33 while the end portions 26, 26 of the glass bulb 25 are inserted into the lamp mounting tube portions 23, 23, and the central bent portion 27 is also fixed. Is bonded to the lower surface of the partition plate 4 by the thermosetting adhesive 34, so that it is fixed to the partition plate 4 at a total of three places.

Each pair of external lead wires 22, 22 led out from the end portions 26, 26 of the fluorescent lamp 21 corresponds to the corresponding connection terminal 1.
Wrap multiple turns around 5, 15 and connect each, and solder the connected part. At this time, the external lead wire 22 is wound around the connection terminal 15 while leaving a slack in advance, so that the tension of the external lead wire 22 can be prevented from being applied to the connection terminal 15.

In this state, the partition plate 4 is attached to the cover 1. In this work, the locking tongue 7 formed on the flange portion 6 of the partition plate 4 passes over the locking projection 9 formed on the cover 1, and the locking tongue 7 is elastically deformed and locked to the locking projection 9. Then
The cover 1 and the partition plate 4 are joined together.

Next, the inverter circuit 12 and the base 3 are electrically connected, and the base 3 is fixed to the cylindrical portion 2 of the cover 1.

When such assembling is completed, the partition plate 4
A thermosetting adhesive 43 is filled between the outer peripheral surface of the rising side wall 5 and the inner surface of the opening of the cover 1. Since this thermosetting adhesive 43 joins the partition plate 4 and the cover 1, the partition plate 4 is adhered to the cover 1 and is prevented from coming out. Then, while the thermosetting adhesive 43 is not yet cured, the fluorescent lamp 21 is covered with the globe 35, and the neck portion 36 of the globe 35 is formed between the outer peripheral surface of the rising side wall 5 of the partition plate 4 and the inner surface of the opening portion of the cover 1. And is embedded in the thermosetting adhesive 43 filled therein. Then, the neck portion 36 of the glove 35 has ribs 41 of the cover 1 and ribs 42 of the partition plate 4.
And is held at a predetermined position in a point contact state with the thermosetting adhesive 43 is adhered over the inner surface and the outer surface of the neck portion 36 of the globe 35, and in this state, the thermosetting adhesive 43 waits for solidification. .

When the thermosetting adhesive 43 solidifies, the gloves
35 is joined to the rising side wall 5 of the partition plate 4 and the inner surface of the opening of the cover 1 via the thermosetting adhesive 43.

The fluorescent lamp device configured as described above is attached to a lighting fixture having an Edison socket to which an incandescent lamp is attached, to obtain a lighting device.

Then, when the fluorescent lamp 21 is turned on, the heat of the fluorescent lamp 21 is transmitted to the external lead wire 22 wound around the connection terminal 15, and the iron core wire of the external lead wire 22 is heated and hardened. The winding force of the lead wire 22 with respect to the connection terminal 15 is maintained.

Table 1 shows the results of the wrapping strength test between the outer lead wire 22 made of the iron core wire of the present embodiment and the conventional outer lead wire made of the copper wire. In addition, the test method is to attach a jig to the push-pull gauge, press the external lead wire 22 wound around the connection terminal 15 from the axial direction with this jig, and push the push-pull gauge when the external lead wire 22 is displaced. The value of is the winding strength (shear strength) kgf. The diameter of the external lead wire 22 of this embodiment is 0.4 mm, and the diameter of the conventional external lead wire is 0.5 mm. The diameter of the iron core wire is 1 of the diameter of the external lead wire 22.
It suffices to have / 2 or more. Copper coating thickness is 1 μm
It is formed to be about 30 μm. The connection terminal numbers shown in the table are the numbers given to each of the four connection terminals 15, the external lead wire numbers are given to each of the three samples, and (0) is the initial temperature cycle 0 times. And
(200) is the temperature cycle repeated 200 times. The temperature cycle is -20 ° C for 40 minutes and 135 ° C for 4 minutes.
Repeat every 0 minutes.

[0054]

[Table 1] As shown in Table 1, in the conventional external lead wire, the average was 12.95 kgf in the initial stage, but when the temperature cycle was repeated, the average was 11.65 kgf, which was lower than the initial winding strength.

On the other hand, in the external lead wire 22 of this embodiment, the average was 9.10 kgf in the initial stage, but when the temperature cycle was repeated, the average was 13.57 kgf, which was higher than the initial winding strength. . This is because the initial winding strength is low due to the thin wire diameter, but the winding strength is increased because the iron core wire of the external lead wire 22 is heated and hardened by the heat of the fluorescent lamp 21. Therefore, the winding force of the external lead wire 22 with respect to the connection terminal 15 can be maintained, and an increase in contact resistance can be prevented. In addition, the external lead wire 22 made of an iron core wire has a material cost lower than that of a copper wire and is easily manufactured.

Further, as shown in FIG. 1, since a gap is formed between the end portion of the cover 1 into which the globe 35 is fitted and the peripheral surface of the globe 35, the expansion coefficient of the cover 1 and the globe 35 is increased. The influence of the difference can be prevented. That is, especially when the globe 35 is made of glass, the difference in expansion coefficient between the cover 1 made of synthetic resin and the cover 1 made of synthetic resin is large.
When 35 and 35 are in contact with each other, expansion and contraction of the cover 1 are transmitted to the globe 35, which causes a problem that the globe 35 is distorted, but the problem can be solved by providing a gap.

Further, at the time of assembling the fluorescent lamp device, after filling the gap between the outer peripheral surface of the rising side wall 5 of the partition plate 4 and the inner surface of the opening of the cover 1 with the thermosetting adhesive 43,
When the neck 36 of the globe 35 is inserted, the ribs 41 of the cover 1 and the ribs of the partition plate 4 are inserted into the neck 36 of the globe 35.
42 and the neck portion 36 of the globe 35 can be positioned and held at a predetermined position between the partition plate 4 and the cover 1. This is because if the gap between the partition plate 4 and the cover 1 is reduced, the glove 35 comes into close contact with the partition plate 4 and the cover 1 to cause a problem of difference in expansion coefficient of each member. The provision of the position causes a problem that the position of the globe 35 cannot be determined. Therefore, the ribs 41 and 42 can position and hold the globe 35 at a predetermined position, and since the ribs 41 and 42 and the globe 35 are in point contact with each other, the problem of the difference in expansion coefficient between the members can be solved.

Next, FIGS. 4 and 5 show a second embodiment. 4 is a perspective view of a part of the external lead wire 22 when wound, and FIG. 5 is a perspective view of a part of the external lead wire 22 after being wound.

A projecting portion 61 is projectingly formed on the edge of the circuit board 13 in the vicinity of the connection terminal 15 standing upright. Then, the external lead wire 22 led out from the fluorescent lamp 21 is connected to the connection terminal 15
When wrapping around the
22 is wound via the protruding portion 61, and after the winding, the external lead wire 22 is removed from the protruding portion 61 as shown in FIG. The tension of the external lead wire 22 is not applied to and the soldering connection can be surely performed.

[0060]

According to the fluorescent lamp device of the first aspect, the iron core wire of the external lead wire wound around the connection terminal is heated and hardened by the heat of the fluorescent lamp, so that the connection terminal of the external lead wire is formed. It is possible to maintain the wrapping force with respect to and prevent an increase in contact resistance.

According to the fluorescent lamp device of the second aspect,
In addition to the effect of the fluorescent lamp device according to the first aspect, a desired winding force can be obtained even when the wire diameter of the external lead wire is 0.1 to 0.5 mm.

According to the fluorescent lamp device of the third aspect,
In addition to the effect of the fluorescent lamp device according to the first or second aspect, the electrical conductivity can be improved by using the external lead wire having the core wire coated with copper.

According to the fluorescent lamp device of the fourth aspect,
In addition to the effect of the fluorescent lamp device according to any one of claims 1 to 3, when the fluorescent lamp is lit at a high frequency, the temperature becomes high, and the winding force of the external lead wire can be effectively increased.

According to the fluorescent lamp device of the fifth aspect,
In addition to the effect of the fluorescent lamp device according to any one of claims 1 to 4, the inside temperature becomes high due to the substantially sealed envelope, and the winding force of the external lead wire can be effectively increased.

According to the fluorescent lamp device of the sixth aspect,
In addition to the effect of the fluorescent lamp device according to any one of claims 1 to 5, the input power per unit volume of the envelope is 0.
By setting it to 025 W / cm ³ or more, the inside of the envelope can be set to a temperature at which the winding force of the external lead wire is effectively increased.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a fluorescent lamp device showing a first embodiment of the present invention.

FIG. 2 is a perspective view of the fluorescent lamp device of the above embodiment in an exploded state, excluding the globe.

FIG. 3 is a schematic sectional view of a part of the fluorescent lamp device according to the above embodiment.

FIG. 4 is a perspective view of a part of the external lead wire during winding according to a second embodiment of the present invention.

FIG. 5 is a perspective view of a part after winding the external lead wire of the embodiment.

[Explanation of symbols]

 1 Cover 3 Base 12 Inverter circuit as lighting circuit 21 Fluorescent lamp 22 External lead wire 25 Glass bulb 28 Electrode coil as filament electrode 35 Globe 38 Enclosure

Claims (6)

[Claims] 1. A cover having a base; a glass bulb attached to the cover to form an airtight discharge space; a pair of filament electrodes sealed at both ends of the glass bulb;
Fluorescent lamp having a rare gas enclosed in a glass bulb, a phosphor formed on the inner surface of the glass bulb, and an external lead wire having an iron core wire connected to each filament electrode and led out from the end of the glass bulb. A lighting circuit having a connection terminal around which an external lead wire of the fluorescent lamp is wound and connected, the lighting circuit being connected between the base of the envelope and the fluorescent lamp.
A fluorescent lamp device comprising: 2. The outer lead wire has a diameter of 0.1 to 0.5 m.
The fluorescent lamp device according to claim 1, wherein the fluorescent lamp device is m. 3. The fluorescent lamp device according to claim 1, wherein the core of the external lead wire is coated with copper. 4. The fluorescent lamp device according to claim 1, wherein the lighting device turns on the fluorescent lamp at a high frequency. 5. A glove having at least a part of a light-transmitting material for accommodating the glass bulb is attached to the cover, and the glove and the cover form a substantially enclosed envelope. Item 5. A fluorescent lamp device according to any one of items 1 to 4. 6. The fluorescent lamp device according to claim 1, wherein the input power per unit volume of the envelope is set to 0.025 W / cm ³ or more.