JP3362469B2 - Fluorescent lamp equipment - Google Patents

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 in which a bent fluorescent lamp or the like is attached to the other end of a cover having a base at one end, and an electronic lighting circuit component is accommodated in the cover.

[0002]

2. Description of the Related Art Recently, a lighting circuit component such as a ballast or an electronic lighting circuit component is housed in a cover having a screw-type base for an incandescent lamp at one end, and a U-shaped or W-shaped component is provided at the other end of the cover. Fluorescent lamp devices equipped with a curved fluorescent lamp such as a saddle type are commercially available. This type of fluorescent lamp device is compatible with incandescent light bulbs because it has lighting circuit components housed in the cover, and can be used as an energy-saving light source if used in place of incandescent light bulbs. It is called a fluorescent lamp.

In such a fluorescent lamp device, the end portion of the bent type fluorescent lamp, that is, the end portion in which the electrodes are sealed is exposed in the cover and electrically connected to the lighting circuit component. However, usually, in a fluorescent lamp, an exhaust thin tube is connected to an end portion where electrodes are sealed, and this is sealed and cut after exhausting, but remains as a thin tube chip after sealing and cutting. Since the thin tube projects from the end of the bulb, the thin tube is likely to be the coldest part during the lighting of the lamp. In the fluorescent lamp, the vapor pressure of the enclosed mercury depends on the temperature of the coldest portion, and thus the temperature of the thin tube affects the mercury vapor pressure, which affects the lamp characteristics such as the luminous efficiency. Also,
When an amalgam is used instead of enclosing pure water silver in a valve, the amalgam is often contained in a thin tube in order to maintain its optimum operating temperature. Therefore, since the temperature of the thin tube influences the lamp characteristics, it is required to be managed with high accuracy.

However, when a choke coil type ballast is used as a circuit component, this type of ballast generates heat during lighting and the temperature inside the cover rises. Therefore, the temperature of the thin tube protruding from the end of the lamp rises due to the heat of the ballast, the temperature of the thin tube exceeds the temperature that you want to maintain as the coldest part, and the temperature of the amalgam exceeds the optimum operating range. Has the drawback of rising.

For this reason, electronic circuit components are sometimes used as lighting circuit components instead of ballasts.
The electronic circuit component generates less heat from itself, and therefore, there is no concern that heat is transferred from the electronic circuit component to the thin tube.

[0006]

However, even in the fluorescent lamp device using the electronic circuit parts, the ambient air is heated by the heat emitted from the bulb, and depending on the lighting posture, the high temperature air touches the thin tube and the thin tube is heated. There is a problem that raises the temperature of amalgam and the temperature of amalgam.

The present invention has been made based on such a situation, and an object thereof is to prevent the temperature of the thin tube and the amalgam from rising due to the heat of the valve,
It is an object of the present invention to provide a fluorescent lamp device capable of maintaining an amalgam temperature in an optimum state and maintaining high lamp characteristics.

[0008]

According to a first aspect of the present invention, a fluorescent lamp is attached to the other end of a cover having a base at one end, and an electronic lighting circuit component mounted on a circuit board is accommodated in the cover. In the fluorescent lamp device
A thin tube accommodating an amalgam is projected at the end of the fluorescent lamp, and a through hole or a notch is formed in the circuit board, and the thin tube penetrates the through hole or the notch. So that the amalgam is placed on the base side of the circuit board by projecting it toward the base side of the circuit board.
Characterized in that was. The invention of claim 2 provides the circuit board
With one side facing each end of the fluorescent lamp
It is characterized in that it is thermally shielded from the fluorescent lamp by being arranged . A third aspect of the present invention is characterized in that a partition board is attached to the opening on the other end of the cover, and the circuit boards are arranged side by side on the base side of the partition board.

[0009]

According to the inventions of claims 1 and 2, since the valve and the thin tube are thermally partitioned by using the circuit board as the heat shield plate, it is possible to reduce the transfer of heat of the valve to the thin tube. Since the temperature rise of the capillaries can be reduced, the amalgam can be maintained at the optimum operating temperature. In this case, a circuit board that also serves as a heat shield plate has a through hole or
The thin tube is placed on the base side of the circuit board only by forming the notch.
Since it is possible to project it, a heat shield plate is specially installed.
Fluorescent lamp with no need to burn and simple structure
The device can be made more compact. According to the invention of claim 3, the partition board and the circuit board both serve as heat shield plates, so that the heat shield effect is further enhanced.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the first embodiment shown in FIGS. In the figure, 1 is a cover made of synthetic resin, and a cylindrical portion 2 is formed at one end of the cover 1. In this cylindrical portion 2, for example, E2
A screw-type mouthpiece 3 such as a 6-shape is attached, and the mouthpiece 3 is fixed to the cylindrical portion 2 with an adhesive, caulking or the like. A globe 4 is attached to the other end of the cover 1. The globe 4 is made of translucent glass or resin and covers the internal fluorescent lamp 20. A fitting peripheral wall 5 that fits into the opening end of the cover 1 is formed in the opening of the globe 4. Locking projections 6 ... Are formed on the fitting peripheral wall 5, and these locking projections 6 ... Are locking recesses 7 ... Formed on the inner surface of the cover 1.
The glove 4 is joined to the cover 1 by being fitted into the cover 1, and thus the engagement between the engagement projections 6 ... And the engagement recesses 7. The globe 4 and the cover 1 may be joined with an adhesive.

An electronic lighting circuit component 10 for high frequency lighting is housed in the cover 1. This electronic lighting circuit component 10
Is mounted on the circuit board 11, and the electronic lighting circuit component 1
0 is, for example, a field effect transistor 12, a temperature fuse 13 for protecting the transistor 12, an electrolytic capacitor 14, a temperature fuse 15 for protecting the whole circuit, and other full-wave rectifiers, choke coil transformers, positive characteristics not shown. These are thermistors, thyristors, capacitors, toroidal core winding coils, etc.

The circuit board 11 supporting such an electronic lighting circuit component 10 has, for example, a circular shape, and has a holding step portion 8 having a peripheral edge formed on the cover 1 and a fitting peripheral wall 5 of the globe 4. Hold in between. As a result, the circuit board 11 closes the other end opening of the cover 1 and is separated from the inside of the globe 4 inside the cover 1 by the lighting component housing chamber 1.
Make up eight. And each electronic lighting circuit component 1
0 is stored in the lighting component storage chamber 18.

A bent fluorescent lamp 20 is housed in the globe 4. The bent fluorescent lamp 20
Although it may be U-shaped or W-shaped, a saddle-shaped fluorescent lamp is used in this embodiment. The saddle-shaped fluorescent lamp 20 has a saddle shape in which a straight tube bulb is bent and formed in a U shape at an intermediate portion thereof, and the intermediate bent portion 21a and the straight portions 21b at both ends are bent and formed so as to face each other. A fluorescent lamp having a bulb-shaped bulb 21 and forming a saddle-shaped discharge path as a whole. In this fluorescent lamp 20, electrodes 22 (only one of which is shown) made of a filament coil are sealed at both ends 21 b of a bulb 21. And
Thin tubes 23 and 24 are connected to the ends of the bulb 21, respectively, and the thin tubes 23 and 24 communicate with the discharge space of the bulb 21. One thin tube 23 is a thin tube left after sealing and cutting the exhaust pipe, and the other thin tube 24 is a thin tube formed to accommodate the amalgam 25. In this case, the thin tube 24 accommodating the amalgam 25 is the valve 2
It largely protrudes from the end of 1. In addition, this valve 2
The inner surface of 1 is coated with a phosphor coating (not shown), and the bulb 21 is filled with a rare gas such as argon.

In such a bent fluorescent lamp 20, both ends and bent portions are fixed to the circuit board 11. The circuit board 11 is formed with through holes 26, 26 into which the thin tubes 23, 24 are inserted. The thin tubes 23, 24 projecting from both ends of the bent fluorescent lamp 20 are inserted through the through holes 26. Then, it is inserted in the base 3 side, that is, the lighting component storage chamber 18. Then, the both ends and the bent portion of the lamp 20 are attached to the lower surface of the circuit board 11 with the adhesive 2
7 and 27 are used for joining. Therefore, the circuit board 11 serves as a mounting member for the lamp 20. That is, in the case of the present embodiment, the circuit board 11 also functions as a mounting board for the electronic lighting circuit component 10, a partition wall for partitioning the inside of the cover 1 and the inside of the globe 4, and a lamp holder for supporting the lamp 20. The operation of the embodiment having such a structure will be described. The bent fluorescent lamp 20 generates heat during lighting. Particularly, the heat source is the electrode 22, and the temperature of the valve wall around the electrode 22 rises.
This temperature is transmitted to the thin tubes 23 and 24 through the valve wall,
While raising the temperature of the thin tubes 23 and 24 to some extent,
The air around the bulb is warmed, and depending on the lighting direction, the air reaches the periphery of the thin tubes 23, 24 and tries to raise the temperature of the thin tubes 23, 24 excessively.

However, in the case of the above embodiment, the circuit board 11 divides the inside of the cover 1 from the inside of the globe 4,
Therefore, the air warmed by the lamp 20 turns on the lighting component storage chamber 1
Since it is difficult to reach 8, the temperature rise of the lighting component storage chamber 18 is prevented.

The thin tubes 23 and 24 projecting from the end of the lamp 20 have through holes 2 formed in the circuit board 11.
Since the circuit board 11 acts as a heat shield plate, the heat of the lamp 20 is reduced from being transferred to the thin tubes 23, 24 because the circuit board 11 is inserted into the lighting component accommodating chamber via 6 Therefore, the thin tubes 23 and 24 can be maintained at a low temperature, and the stable coldest part is obtained. Therefore, the temperature of the amalgam 25 housed in the thin tube 24 can be maintained at the optimum operating temperature. Therefore, the mercury vapor pressure during lighting of the lamp can be accurately controlled, and good lamp characteristics such as maintaining the lamp efficiency in a high state can be obtained.

In order to dissipate the heat inside the globe 5 to the outside, holes may be formed in the globe 5 or the cover 1, or holes may be formed in the circuit board 11 at other places avoiding the through holes 26, 26. Good.

Further, in the case of the above-described embodiment, the through hole 26 is formed in order to project the thin tube 24 toward the base 3 side from the circuit board 11.
However, the present invention is not limited to this, and as in the second embodiment shown in FIG. 3, a part of the circular peripheral edge is cut out, and notch grooves 28, 28 extending from this are formed, and these notches are formed. The thin tubes 23, 24 may be inserted into the grooves 28, 28. In this case, if the thin tubes 23, 24 are inserted into the cutout grooves 28, 28, the proportion of the thin tubes 23, 24 exposed to the heat from the lamp 20 is reduced.

The circuit board 11 is not limited to a circular shape and may be a polygonal shape. FIG. 4 shows a third embodiment of the present invention. In this embodiment, a partition board 40 is provided between the cover 1 and the globe 5, and the circuit board 11 is arranged on the partition board 40 either directly or with an interval. The bulb 21 of the fluorescent lamp 20 has an end portion 2 in which an electrode 22 is sealed.
1b is formed so as to be longer (higher) so as to extend than the intermediate bent portion 21a, and the end portion 21b of the valve 21 thus extended is formed through the through holes 41, 4 formed in the partition board 40.
1 (only one shown). Thereby, the thin tubes 23 and 24 protruding from the end 21b of the bulb 21 are housed in the lighting component housing chamber 18. The fluorescent lamp 20 is bonded to the partition board 40 using adhesives 27, 27. The electrode 22 is placed on the glove 4 rather than the partition board 40.
It is located on the side.

The thin tubes 23 and 24 are the circuit board 1 described above.
1 or through the through holes 26, 26 (not shown) to the base 3 side of the circuit board 11. In such a configuration, the partition board 40 and the circuit board 11 block the heat in the globe 4 from being transferred to the cover 1, so that the temperature rise of the thin tubes 23 and 24 can be suppressed.

In this case, since the intermediate bent portion 21a of the valve 21 is lower than the end portion 21b, a space is formed above this bent portion 21a. Therefore, by forming a stepped portion that approaches the intermediate bent portion 21a on the partition board 40 and housing the circuit board 11 at a position lowered by this stepped portion, the space of the lighting component housing chamber 18 can be reduced. Therefore, the entire length of the lamp device can be shortened and the size can be reduced.

Instead of the embodiment shown in FIG. 4, the partition board 40 may be constituted by the circuit board 11. Further, the present invention is not limited to the use of the globe 5, and can be practiced even in a fluorescent lamp device in which the lamp is exposed and used. An example of this type of fluorescent lamp device will be described as a fourth embodiment with reference to FIG. This example
A partition plate 30 which also serves as a lamp support plate is fixed to the opening of the other end of the cover 1 without using the globe 5. Partition board 3
0 has a shallow dish shape, and a fitting peripheral wall 5 that fits into the opening end of the cover 1 is formed in the opening. Locking projections 6 ... Are formed on the fitting peripheral wall 5, and these locking projections 6 ... are locking recesses 7 ... Formed on the inner surface of the cover 1.
The partitioning board 30 is joined to the cover 1 by being fitted into the cover 1, and thus by the engagement of the locking projections 6 ... With the locking recesses 7. The partition board 30 and the cover 1 may be joined by an adhesive. As a result, the partitioning board 30 closes the opening of the cover 1.

The circuit board 11 having the electronic lighting circuit component 10 mounted thereon is sandwiched between the holding stepped portion 8 formed on the cover 1 and the fitting peripheral wall 5 of the partitioning board 30. There is.

A bent fluorescent lamp 20 is attached to the partition board 30. The bent fluorescent lamp 20 of this embodiment has two U-shaped glass bulbs 31a and 31a.
Fluorescent lamps in which b (only one of which is shown) are juxtaposed to each other to form a saddle-shaped discharge path as a whole are used. In this fluorescent lamp 20, two glass bulbs 31a and 31b, which are previously processed into a U shape, are arranged side by side, and their respective one ends are fused and joined together. An electrode 22 is sealed at the other end of each of the two U-shaped glass bulbs 31a and 31b. In such a bent fluorescent lamp 20, both end portions 33 and the fused portion 34 are fixed to the partition plate 30. On the bottom wall of the partitioning board 30, both end portions 33 and the fused portion 34 of the bent fluorescent lamp 20 are provided.
The insertion holes 35 into which the lamps are inserted are opened, and the both end portions 33 and the fusion-bonded portions 34 of the lamp 20 are inserted into the insertion holes 35 from below. The insertion ends of the lamps 20 are joined to the partitioning board 30 with an adhesive 36.

In such a mounted state, the thin tubes 23 and 24 (only one of which is shown) extended from the end portion of the lamp 20 are inserted through the through holes 26 formed in the circuit board 11, and are capped more than the circuit board 11. It is located on the 3rd side.

In the case of such a structure, since the lamp 20 is exposed, the proportion of the high temperature air around the lamp which comes into contact with the thin tubes 23 and 24 is small, but the thin tubes 23 and 24 are small.
Since the circuit board 11 and the partition board 30 double-shield the heat, the temperature rise of the thin tubes 23 and 24 can be further suppressed. In this case, since the circuit board 11 is hidden by the partition board 30, it cannot be seen from the outside.

[0027]

As described above, according to the present invention, since the thin tube is projected to the base side of the circuit board, the thin tube and the valve are thermally shielded by the circuit board, and the valve It is possible to reduce heat transfer to the thin tube. Therefore, it is possible to maintain the temperature of the thin tube and the temperature of the amalgam in an optimum state and maintain high lamp characteristics. In this case, the circuit board that doubles as
A thin tube can be removed from the circuit board simply by forming a through hole or notch.
The heat shield plate can also be made to project toward the base side.
Is not necessary, and the structure is simple.
The light lamp device can be made more compact.

[Brief description of drawings]

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

FIG. 2 is a plan view of the circuit board of the embodiment.

FIG. 3 is a plan view of a circuit board showing a second embodiment of the present invention.

FIG. 4 is a cross-sectional view of a fluorescent lamp device showing a third embodiment of the present invention.

FIG. 5 is a cross-sectional view of a fluorescent lamp device showing a fourth embodiment of the present invention.

[Explanation of symbols]

1 ... Cover 3 ... Clasp
5 ... Globe 10 ... Electronic lighting circuit component 11 ... Circuit board 20 ... Fluorescent lamp 22 ... Electrode 23, 24 ... Capillary tube 25 ... Amalgam 26 ... Through hole 28 ... Notch groove 30, 40 ... Partition board

Continuation of the front page (56) Reference JP-A-60-264038 (JP, A) JP-A-3-167706 (JP, A) JP-A 64-2203 (JP, A) Actual development 61-101905 (JP , U) Actual Kaihei 1-444512 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) F21S 2/00

Claims (3)

(57) [Claims] 1. A fluorescent lamp device in which a fluorescent lamp is attached to the other end of a cover having a base at one end, and an electronic lighting circuit component mounted on a circuit board is housed in the cover. A thin tube containing amalgam is projected at the end of the lamp, and a through hole or a notch is formed in the circuit board, and the thin tube penetrates the through hole or the notch to form the circuit. The amalgam is placed on the base side of the circuit board by projecting it toward the base side of the board.
A fluorescent lamp device characterized in that 2. The circuit board is provided with one surface thereof on which the fluorescent light is applied.
By placing the lamps opposite to each other,
The fluorescent lamp device according to claim 1, wherein the fluorescent lamp device is thermally shielded from the lamp. 3. A lamp supporting plate is attached to the opening of the other end of the cover, and the circuit board is arranged side by side on the base side of the lamp supporting plate.
The fluorescent lamp device described in 1.