JPH04167327A - Fluorescent lamp device - Google Patents

Abstract

PURPOSE:To prevent inferior electric contact by crowning a screw base on a cylindrical portion, forming a cut groove along the axial direction, inserting a lead wire through this cut groove, and connecting the lead wire to the screw base. CONSTITUTION:A circular reinforcement ring 30 is fitted in an opening end in a cylindrical portion 15 protruded from a cover 2. The ring 30 is provided with a flange 31 to be superposed on the opening end face of the cylindrical portion 15 and a fitting portion 32 to be fitted to an opening portion of the cylindrical portion 15, and formed with an introduction hole 33 for leading a lead wire 27b in the central portion. When such a ring 30 is fitted to the opening portion of the cylindrical portion 15, each groove space of cut grooves 17, 17 is maintained, and mutual approaching for deformation of walls of the cylindrical portion 15 is eliminated. With this constitution, even in the case where a lamp and ballast are heated during lighting and the heat is transmitted to the cylindrical portion 15 via the cover 2 to raise a temperature, a top end portion of the cylindrical portion 15 is prevented from contraction in the diameter so that loosening of the base 7 never occurs.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention is directed to housing lighting circuit components in a cover having a screw-type (E-type) cap attached to one end, and This invention relates to a fluorescent lamp device with a fluorescent lamp attached to the other end.

(Prior Art) Conventionally, a ballast or high-frequency lighting circuit component is housed in a cover with a screw-in base for an incandescent light bulb attached to one end, and a U-shaped, W-shaped, saddle-shaped, etc. Fluorescent lamp devices have been developed that are equipped with bent fluorescent lamps such as the one shown in FIG.

This type of fluorescent lamp device has a screw-in base and lighting circuit components, so it can be screwed into a screw-in socket in which incandescent light bulbs were conventionally installed, thus making it compatible with incandescent light bulbs. Because of this, it is becoming popular as an energy-saving light source.

By the way, in this type of fluorescent lamp device, when a screw-type cap is attached to the end of the cover, the following structure is adopted.

That is, FIG. 7 shows the overall structure of the fluorescent lamp device, and numeral 1 in the figure is an envelope. The envelope 1 includes a cover 2 made of synthetic resin or metal, and a translucent globe 3 connected to the open end of the cover 1. An internal space surrounded by the cover 2 and the glove 3 is divided by a partition plate 4. Note that the cover 2, the glove 3, and the partition board 4 are bonded together with an adhesive 5.

A chassis 6 made of synthetic resin is housed in the space surrounded by the cover 2 and the partition panel 4, and the chassis 6 holds a ballast 8 as a lighting circuit component. A screw-in base 7 is attached to the other end of the chassis 6.

A fluorescent lamp, for example a bent fluorescent lamp 9, is installed in a space surrounded by the globe 3 and the partition panel 4.

The bent fluorescent lamp 9 may have a U-shape, a W-shape, etc., but in the example shown in the figure, a luminous bulb 10 made of a U-shaped glass tube is bent so that the side surface is approximately 5-shaped. A shaped fluorescent lamp is used. Electrodes 11 are sealed to each end of the fluorescent lamp 9, and a fluorescent coating 12 is formed on the inner surface.

Such a bent fluorescent lamp 9 has partition plates 4 at both ends.
It is inserted into an insertion hole 13 formed in , and is fixed to this partition board 4 with an adhesive (not shown).

A cylindrical portion 15 is integrally provided on such a chassis 6 in a protruding manner. As shown in FIGS. 8 and 9, the cylindrical portion 15 has a spiral groove 16 formed on its outer circumferential surface, and a pair of notched grooves 17 and 17 along the axial direction are formed on the wall of the cylindrical portion at opposing positions. The cylindrical portion 15 is divided in the circumferential direction.

This cylindrical portion 15 has an insertion hole 1 opened at the top of the cover 2.
8 and is led out to the upper part of the cover 2, and the cover 2 is held between the chassis 6 and a presser ring 19 fitted into the cylindrical portion 15.

The cylindrical portion 15 is covered with the cap 7.

The cap 7 includes a cap body 25 having a threaded portion, and an eyelet terminal (top terminal) 26 joined to the cap body 25 via an insulator 24.

The cap 7 is placed over the cylindrical portion 15 so that the threaded portion of the cap body 25 is screwed into the spiral groove 16 of the cylindrical portion 15.

Lead wires 27a127b are connected to this base 7, and these lead wires 27a127b are connected to the ballast 8.
and a fluorescent lamp 9.

In this case, one lead wire 27a is inserted through one notch 17 formed in the cylindrical portion 15, guided to the root of the cylindrical portion 15, and soldered to the opening of the base body 25.

The other lead wire 27b is guided from the open end of the cylindrical portion 15 and soldered to the eyelet terminal 26.

In this state, the opening of the mouthpiece body 25 is caulked with a punch, so that the mouthpiece 7 is fixed to the cylindrical portion 15.

(Problem to be Solved by the Invention) In such a conventional structure, a pair of notch grooves 17 and 17 are formed in the cylindrical portion 15 in order to guide the tip of the lead wire 27a to the open end of the base 7. .

The reason why the cutout grooves 17.17 are formed at two locations is to eliminate the directionality and allow either of the cutout grooves 17.17 to be used.

However, when the pair of cutout grooves 17.17 are formed in the cylindrical portion 15, the mutually separated walls may be deformed as shown in phantom lines in FIG.

That is, in this type of lamp device, the lamp 9 and the ballast 8 generate heat during lighting, and this heat is transmitted to the cylindrical portion 15 through the chassis 6 and the cover 2, and the temperature of the cylindrical portion 15 may rise. .

For this reason, the tip of the cylindrical portion 15 is deformed so that the walls separated by the pair of notched grooves 17 and 17 approach each other, as shown by the arrows, which means that the diameter of the opening of the cylindrical portion 15 is reduced. However, there is a risk that the cap 7 that is fitted here may become loose, resulting in a loose base, and may fall due to poor mechanical threading.

The present invention aims to provide a fluorescent lamp device that can prevent a cylindrical portion in which a notched groove is formed from shrinking in diameter due to a rise in temperature, etc., and can prevent the cap from loosening.

[Structure of the Invention] (Means for Solving the Problems) The first aspect of the present invention is characterized in that a reinforcing ring is fitted into the opening of the cylindrical portion.

Further, the second aspect of the present invention is characterized in that a bridge portion spanning the notch groove is formed at the open end of the cylindrical portion.

(Function) In both the first and second aspects of the present invention, since the reinforcing ring and the bridge portion prevent the diameter of the cylindrical portion from decreasing, it is possible to prevent the cap from loosening.

(Example) The present invention will be described below with reference to the first example shown in FIGS. 1 and 2.
This will be explained based on an example.

In this embodiment, the overall configuration of the fluorescent lamp device may be the same as the conventional one, so a description thereof will be omitted, and only the configuration that is different from the conventional one will be explained.

A circular reinforcing ring 30 is fitted into the open end of the cylindrical portion 15 protruding from the cover 2 .

The reinforcing ring 30 has a flange portion 31 that overlaps the open end surface of the cylindrical portion 15, a fitting portion 32 that fits into the opening of the cylindrical portion 15, and a conductive hole 33 in the center from which the lead wire 27b is led out. is formed.

If such a reinforcing ring 30 is fitted into the opening of the cylindrical portion 15, the groove spacing between the cutout grooves 17 and 17 is maintained, and the walls of the cylindrical portion 15 are prevented from deforming toward each other.

Therefore, the lamp 9 and the ballast 8 generate heat during lighting, and this heat passes through the chassis 6 and the cover 2 to the cylindrical part 15.
Even if the temperature of the cylindrical portion 15 increases due to the temperature being transmitted to the cylindrical portion, the diameter of the tip portion of the cylindrical portion 15 is prevented from decreasing, and the cap 7 does not loosen.

Next, a second embodiment will be explained based on FIGS. 3 and 4.

In this embodiment, a bridge 40 is constructed at the opening of the cylindrical portion 15. The bridge 4o is integrally formed with mutually intersecting ribs 41.41 at the opening of the cylindrical portion 15, and these ribs 41.41 span the end faces of the cutout grooves 17.17 on opposite sides.

In such a configuration, arrows A, A direction and B, B
Deformation in either direction is prevented, and the diameter of the tip of the cylindrical portion 15 is prevented from decreasing.

Furthermore, a third embodiment will be explained based on FIGS. 5 and 6.

This embodiment also has a bridge 4 at the opening of the cylindrical portion 15.
5, but the bridge 45 of this embodiment
The ribs 46.46 straddle the notch grooves 17.17 and the adjacent end faces.

In the case of such a configuration, arrows A, A direction and B, B
Deformation in either direction is prevented, and the diameter of the tip of the cylindrical portion 15 is prevented from decreasing.

Further, in this case, the ribs 46, 46 may be formed thin and may be broken if necessary. By doing this, you can use thin ribs 4 when routing wiring.
You can use it to break the 6th part.

Note that the present invention is not limited to the above embodiments.

For example, the fluorescent lamp device is not limited to having the globe 3, and the lamp 9 may be exposed.

Further, the lamp may have various shapes other than the B shape, such as a saddle shape, a W shape, and a U shape.

Furthermore, the lighting circuit components are not limited to ballasts, and high-frequency lighting circuit components can also be used.

[Effects of the Invention] As explained above, in both the first and second aspects of the present invention, the reinforcing ring and the bridge portion provided on the cylindrical portion prevent deformation of the cylindrical portion separated by the notch groove,
It is possible to prevent the cap from loosening due to the diameter reduction of the cylindrical portion. Therefore, poor electrical contact and poor mechanical coupling can be prevented.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of the base portion showing the first embodiment of the present invention, Fig. M2 is a sectional view of the assembled state, and Fig. 3 is a plan view of the cylindrical part showing the second embodiment of the present invention. 4 is a front view, FIG. 5 is a plan view of a cylindrical portion showing a third embodiment of the present invention, FIG. 6 is a front view 1, and FIG. 7 is a sectional view of the entire fluorescent lamp device. FIG. 8 is an exploded perspective view of a conventional base portion, FIG. 9 is a sectional view of the assembled state, and FIG. 10 is a front view of the cylindrical portion. 2...Cover, 3...Glove, 6...Chassis,
7... Cap, 9... Fluorescent lamp, 15... Cylindrical portion, 16... Spiral groove, 17... Notch groove, 25...
The base body. 26...Eyelet terminal, 27a, 27b
, , Lead wire, 30... Reinforcement ring, 40, 45... Bridge portion. Applicant's agent: Patent attorney Takehiko Suzue 9L7 Rumph. Figure 7 Figure 8 Figure 9 Figure 10

Claims (3)

[Claims] (1) Attach a fluorescent lamp and lighting circuit components for lighting the fluorescent lamp to a cover having a cylindrical portion at one end,
The cylindrical part is fitted with a screw-in type cap and has a cutout groove formed along the axial direction, and a lead wire led from the lamp or lighting circuit component is inserted into the cutout groove, and the lead wire is inserted into the screw. A fluorescent lamp device connected to a shaped cap, characterized in that a reinforcing ring is fitted into the opening of the cylindrical portion. (2) Attach a fluorescent lamp and lighting circuit components for lighting the fluorescent lamp to a cover having a cylindrical portion at one end;
The cylindrical part is fitted with a screw-in type cap and has a cutout groove formed along the axial direction, and a lead wire led from the lamp or lighting circuit component is inserted into the cutout groove, and the lead wire is inserted into the screw. A fluorescent lamp device connected to a shaped base, characterized in that a bridge portion spanning the notch groove is formed at the open end of the cylindrical portion. (3) The fluorescent lamp device according to claim 2, wherein the bridge portion is formed to intersect with the open end of the cylindrical portion.