JPH04262336A - Fluorescent lamp device - Google Patents

Abstract

PURPOSE:To prevent breakage of a lighting tube, generation of noise, and wire touch of the leads when a lamp device is vibrated, and preclude inconvenience originating from the lighting tube and capacitor getting a high temp. CONSTITUTION:A lighting tube 22 and a capacitor 23 are together with leads attached to the inner surface of the tube accommodating part 13c of a lamp base 13 for accommodating them using adhesives 24, 24a, 24b.

Description

[Detailed description of the invention]

[Object of the invention]

0002

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorescent lamp device in which a lighting tube and a capacitor for noise prevention are housed in a single-end cap that fixes one end of an inverted U-shaped fluorescent lamp. .

0003

2. Description of the Related Art Conventionally, this type of fluorescent lamp device has been constructed as shown in FIGS. 11 and 12.

[0004] This fluorescent lamp device 1 includes a fluorescent lamp 2 whose front shape is, for example, a double inverted U-shape, which is erected on a base 3 .

As shown in the plan view of FIG. 11, the fluorescent lamp 2 includes two inverted U-shaped glass bulbs 2a and 2b whose ends are integrally connected in the lateral direction via a connecting portion 2c. , a pair of electrodes 4a, at the other end of each bulb 2a, 2b.
4b is sealed.

The cap 3 has an open end (lower end in FIG. 11) of a cap cover 3a in the form of a square tube with a lid on which the fluorescent lamp 2 is erected on the upper lid, and an upper end of the open end of a cover pedestal 3b in the shape of a rectangular tube. It is configured into a single-ended shape by being fitted externally.

[0007] The base 3 has a rectangular tube-shaped lighting tube storage portion 5 integrally and coaxially protruded from the center of the bottom of a rectangular tube-shaped cover pedestal 3b. Inside, a lighting tube 6 for lighting the fluorescent lamp 2 and a capacitor 7 made of ceramic or the like for noise prevention are housed. The lighting tube 6 is an outer lead wire 8 for a preheating circuit consisting of a pair of left and right wires in FIG.
It is electrically connected to one end of the pair of electrodes 4a and 4b via a and 8b, and is connected in parallel to the capacitor 7. The other ends of the pair of electrodes 4a, 4b are electrically connected to a pair of left and right cap pins 10a, 10b via wire-shaped outer pin leads 9a, 9b.

[0008]

However, such a conventional fluorescent lamp device 1 has the following problems.

(1) Since the lighting tube 6, the capacitor 7, and a part of the outer lead wires 8a and 8b for the preheating circuit are stored in the lighting tube storage part 5 in a free state, the fluorescent lamp device 1 does not vibrate. Then, the lighting tube 6 is placed on the inner wall of the lighting tube storage section 5.
Alternatively, the capacitor 7 may be hit and the lighting tube 6 may be damaged or an abnormal noise may be generated.

(2) Since the outer lead wires 8a, 8b, 9a, 9b for the preheating circuit and the pins are not coated with an insulating tube or the like, when the fluorescent lamp device 1 vibrates, the outer lead wires 8a, 8b, 9a, 9b are not covered with an insulating tube or the like. The lighting tube 6, the capacitor 7, etc. may swing within the ignition tube 5, and the lead wires 8a to 9b may be twisted, causing a wire touch or the like, which may cause a short circuit. As a result, the fluorescent lamp 2 may suffer from defects or early darkening.

(3) The fluorescent lamp device 1 shown in FIG. 11 has the base 3 located below the fluorescent lamp 2, and is in a so-called base-down state. However, this can be reversed so that the base 3 is facing upward. When the lamp is lit in a so-called base-up state, the temperature of the cap 3 and its interior increases significantly.

For this purpose, the lighting tube 6 and the capacitor 7
If the temperature exceeds the upper limit of the allowable temperature, the fluorescent lamp 2 may not be able to start due to a short circuit in the lighting tube 6, or an excessive current may be generated due to a short circuit in the capacitor 7, resulting in heat generation, and the lamp cap 3 may be short-circuited.
This may cause the resin part of the product to melt or generate smoke.

Incidentally, an overload test was conducted on the high-wattage fluorescent lamp device 1 that generates a large amount of heat, assuming an abnormal situation.
The lighting tube was 6
temperature rose to about 150°C, and capacitor 7 rose to about 135°C.

Although it is technically possible to configure the lighting tube 6 and the capacitor 7 so that they can exhibit normal performance even at such high temperatures, it would be extremely expensive.

[0015] The present invention has been made in consideration of the above circumstances, and its purpose is to prevent damage to the lighting device due to vibrations, generation of abnormal noise, and wire touch with a simple configuration. An object of the present invention is to provide an inexpensive fluorescent lamp device that can prevent problems caused by high temperatures. [Structure of the invention]

[0016]

[Means for Solving the Problems] In order to solve the above problems, the present invention is constructed as follows.

That is, the present invention provides a fluorescent lamp device in which a lighting device for a fluorescent lamp and a capacitor for noise prevention are built into a cap that fixes both ends of a single-capped fluorescent lamp. and a portion of the lead wires connected thereto are fixed to the inner surface of the base with an adhesive.

[0018]

[Operation] The lighting device, capacitor, and part of the lead wire are fixed to the inside of the cap with adhesive, so even if the fluorescent lamp device vibrates, the lighting device and capacitor will be prevented from swinging within the cap. be able to.

[0019] Therefore, it is possible to prevent twisting of the lead wires due to swinging of the lighting device or capacitor and short circuit due to wire touching between the lead wires, and prevent defects and early blackening.

[0020] Furthermore, when a fluorescent lamp device is lit, the temperature of the fluorescent lamp and the cap rises, but the heat of the lighting device and the capacitor built into the cap is radiated through the adhesive or is dissipated through the adhesive. The heat is transferred to the cap and radiated to the outside through the outer surface of the cap.

[0021] Therefore, it is possible to prevent the lighting device and the capacitor from increasing in temperature, and problems caused by the increase in temperature can be prevented.

[0022]

Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings.

FIG. 1 is a partial vertical sectional view showing the overall configuration of an embodiment of the present invention, and in the figure, a fluorescent lamp device 11 is shown.
For example, a double inverted U-shaped fluorescent lamp 12 is erected on the top of a cap cover 14 in the shape of a rectangular cylinder with a cap 13 .

The fluorescent lamp 12 has two inverted U-shaped bulbs 1.
Each end of the valves 2a, 12b is airtightly sealed, and one end thereof is integrally connected in the lateral direction by a connecting portion 12c as shown in the plan view of FIG.
A pair of electrodes 15a and 15b are hermetically sealed at the other end of 2b.

[0025] The cap 13 has a cover pedestal 13b in the shape of a rectangular cylinder with a bottom.
A cap cover 13a in the shape of a rectangular cylinder with a lid is fitted and fixed on the outer periphery of the opening end, and a lighting tube storage part 13c in the form of a rectangular cylinder with a bottom is protruded concentrically from the center of the bottom of the cover pedestal 13b. are doing.

The fluorescent lamp 12 has its bulbs 12a, 12
A fluorescent film is applied to the inner circumferential surface of b over almost the entire length, and mercury and rare gas are hermetically sealed inside.

Both ends of the pair of electrodes 15a, 15b are made of glass, and a pair of inner lead wires 1 pass through the pair of left and right stems 16a, 16b in the axial direction (vertical direction in the figure).
7a, 17b, 18a, 18b are respectively supported and electrically connected by the upper ends in the figure, and the lower ends of one inner lead wire 17a, 18a of each pair are connected via a pair of left and right outer lead wires 19a, 20a. It is electrically connected to a pair of left and right base pins 21a and 21b. Base pin 2
1a and 21b are vertically provided at the bottom of the cover base 13b.

The other inner lead wire 17b, 18 of each pair
b is a pair of left and right preheating circuit outer lead wires 19b, 20
It is electrically connected to the lighting tube 22 and a capacitor 23 such as a ceramic capacitor via b.

That is, as shown in FIG.
One end of each of the pair of electrodes 15a, 15b is electrically connected to a parallel circuit of a lighting tube 22 and a capacitor 23.

As shown in FIG. 4, the lighting tube 22 includes, for example, a cylindrical bulb 22a and a fixed electrode 22b and a bimetal movable electrode 22c arranged opposite to each other with a small gap therebetween. is a pair of two-line leader lines 22d
, 22e, and extends outward from the bottom 22f.

When a required voltage is applied between the pair of lead wires 22d and 22e, a slight discharge occurs between the fixed electrode 22b and the bimetal movable electrode 22c, and the bimetal movable electrode 22c generates heat. Due to the heat generated, it curves inward and comes into contact with the fixed electrode 22b, thereby closing the contact point.

As shown in the enlarged view of the main part of FIG. 5, a lighting tube 22 and a capacitor 23 are housed in the lighting tube storage section 13c of the base 13.

Furthermore, silicone adhesive 24 is injected to a predetermined height onto the inner bottom of the lighting tube storage portion 13c, and is dried and solidified to bond the lighting tube 22, the capacitor 23, and the pair of preheating circuit outer lead wires 19b, The respective bottoms of the lamps 20b are fixed onto the inner bottom of the lighting tube storage portion 13b.

[0034] The silicone adhesive 24 is desirably a rust-resistant adhesive, but may be either a natural hardening type or a thermosetting type.

In addition, the silicone adhesive 24 is injected so as to cover the lighting tube 22 and the capacitor 23 up to the top, as shown in FIG. 6, or until it is completely submerged, as shown in FIG. Good too.

Furthermore, as shown in FIG. 8, a lighting tube 22,
The bottoms of the capacitor 23 and the pair of preheating circuit outer lead wires 19b and 20b are fixed onto the inner bottom of the lighting tube storage part 13c using a silicone adhesive 24, and the lighting tube storage area is placed slightly above the fixed part. A pair of left and right adhesives 24a, 24 added in a small amount to the left and right inner surfaces of the portion 13c in the figure.
b, one side surface of the lighting tube 22 and the capacitor 23, and a portion of the pair of outer lead wires 19b, 20b for the preheating circuit may be fixed to the inner surface of the lighting tube storage portion 13c.

Furthermore, as shown in FIG. 9, the silicone adhesive 24 on the inner bottom of the lighting tube housing section 13c shown in FIG.
may be omitted, and the lighting tube 22, capacitor 23, and preheating circuit outer lead wires 19b, 20b may be fixed to the inner surface of the lighting tube storage portion 13c using a pair of left and right adhesives 24a, 24b. For example, the cost can be reduced by reducing the amount of silicone adhesive 24 injected.

As described above, each embodiment includes the lighting tube 22, the capacitor 23, and the outer lead wires 19b and 20 for the preheating circuit.
Since a part of b is fixed to the inner surface of the lighting tube accommodating portion 13c of the base 13 with the silicone adhesive 24 or 24a, 24b, even if the fluorescent lamp device 11 vibrates, the lighting tube 22, the capacitor 23, and the pair of It is possible to prevent the outer lead wires 19b, 20b for the preheating circuit from swinging within the lighting tube storage section 13c and colliding with the inner wall of the lighting tube storage section 13c, thereby preventing the generation of abnormal noise. This can prevent short circuits caused by contact with the As a result, defects and early darkening of the fluorescent lamp device 11 can be prevented.

[0039] Also, silicone adhesives 24, 24a, 24
b has heat dissipation properties and is a lighting tube 22 and a capacitor 23 covered with a silicone adhesive 24 as shown in FIG.
The heat dissipation effect increases as the covered area increases.

Therefore, in this embodiment, the lighting tube 22 and the capacitor 23 have good heat dissipation. For example, when the lighting tube 22 and the capacitor 23 are entirely covered as shown in FIG. As shown, the covered area is 100
%, the heat radiation temperature is approximately 15℃, and the lighting tube 22
Also, it is possible to prevent the temperature of the capacitor 23 from increasing. As a result, it is possible to prevent the lighting tube 22 from exceeding the upper limit of the allowable temperature and short-circuiting and causing a malfunction.
Since excessive current due to short-circuiting and heat generation due to this can be prevented, melting of the resin portion of the cap 13 can be prevented.

[0041]

As explained above, in the present invention, at least a part of the lighting device, the capacitor, and the lead wire are fixed to the inner surface of the cap that houses them with an adhesive, so that the fluorescent lamp device does not vibrate. Also, it is possible to prevent the lighting device and the capacitor from swinging within the cap and colliding with the inner surface of the cap, thereby preventing the lighting device from being damaged, and also from generating abnormal noise.

Furthermore, since vibration of the lighting device and the capacitor can be prevented, it is possible to prevent the lead wires from being twisted and short-circuiting each other due to the vibration, and it is possible to prevent defects and early blackening.

Furthermore, since the heat of the lighting device and the capacitor can be radiated from the adhesive or by being transferred to the cap via the adhesive, it is possible to prevent problems caused by the heating of the lighting device and the capacitor.

[Brief explanation of the drawing]

FIG. 1 is a partial vertical sectional view showing the overall configuration of an embodiment of a fluorescent lamp device according to the present invention.

FIG. 2 is a plan view of FIG. 1.

FIG. 3 is an electrical circuit diagram of the embodiment shown in FIG. 1;

FIG. 4 is a front view of the lighting tube shown in FIGS. 1 and 3.

FIG. 5 is an enlarged view of the main part of FIG. 1.

FIG. 6 is a vertical sectional view of a main part of another embodiment of the present invention.

FIG. 7 is a vertical sectional view of a main part of still another embodiment of the present invention.

FIG. 8 is a vertical sectional view of a main part of still another embodiment of the present invention.

FIG. 9 is a vertical sectional view of a main part of another embodiment of the present invention.

FIG. 10 is a graph showing the heat dissipation effect of an example of the present invention.

FIG. 11 is a partial vertical sectional view showing the overall configuration of a conventional fluorescent lamp device.

FIG. 12 is a plan view of FIG. 11;

[Explanation of symbols] 11 Fluorescent lamp device 12 Fluorescent lamps 12a, 12b Bulb 13 Base 13c Lighting tube housing portions 15a, 15b Pair of electrodes 19b, 20b Preheating circuit outer lead wire 22
Lighting tube 23 capacitor

Claims (1)

[Claims] 1. A fluorescent lamp device in which a lighting device for the fluorescent lamp and a capacitor for noise prevention are built into a cap that fixes both ends of a single-capped fluorescent lamp, the lighting device and the capacitor comprising: A fluorescent lamp device, characterized in that a portion of the lead wires connected to these are fixed to the inner surface of the base with an adhesive.