JPS6336562Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a fluorescent lamp device that can be used in place of an incandescent light bulb and can save power.

[Technical background of the invention and its problems]

Fluorescent lamps have better light efficiency than regular incandescent light bulbs and can be used with low power consumption, so recently fluorescent lamps have been fitted with screw-in caps such as the E26 type commonly used in general incandescent light bulbs, and ballasts have been added to fluorescent lamps. , devices have been developed that incorporate lighting circuits and the like to achieve compatibility with general incandescent light bulbs.
In this device, a light-diffusing globe is placed on a base to which a cap is attached, and the center of a straight bulb is bent into a substantially U-shape within a space surrounded by the globe and the base. It has a structure that integrally accommodates a so-called saddle-shaped curved tube valve whose both ends are curved in a substantially U-shape in a direction substantially perpendicular to the plane containing the above-mentioned U-shape, a ballast, a lighting tube, etc. There is.

By the way, this type of device is mainly intended to be used as an alternative to the commonly used incandescent light bulb, so in order to create a feeling of resemblance to an incandescent light bulb, the globe that is the light emitting surface should be made in the same way as the light bulb. It is desirable that it be made of glass.

However, when the glove is made of glass, glass is generally heavy and easily damaged, so when attaching it to the base, it must be firmly fixed using a special adhesive, etc.
Installation becomes troublesome.

Therefore, it is conceivable to make this glove made of synthetic resin and adopt a fitting structure in which, for example, a protrusion and a recess fit together for connection with the base. In this case, synthetic resin materials have already been used for the shades of general lighting equipment, but since this shade only needs to have the function of diffusing the light from the lamp, it is simply a matter of light transmittance and cost. The material was determined by considering only the However, since the above device is intended to be used as a substitute for incandescent light bulbs,
The size of the globe must also be kept to the same size as a ball-shaped light bulb. Therefore, since the fluorescent lamp and the ballast are housed in a narrow space surrounded by the base and the globe, the thermal influence on the globe becomes extremely large. If gloves, which are directly affected by heat, are simply made of resin, there is a risk that the gloves may change color or become deformed due to heat shrinkage, which not only makes them look unsightly, but also prevents them from fitting into the base. There are still problems that need to be resolved, such as rattling caused by thermal deformation in the mating parts.

[Purpose of invention]

The present invention was developed based on these circumstances, and not only can a mechanical fitting structure be used for connection with the base, it also has excellent heat resistance and does not cause rattling in the fitting part. The purpose of the present invention is to provide a fluorescent lamp device which allows the globe to be made smaller due to its high heat resistance and is convenient for use as a replacement for an incandescent light bulb.

[Summary of the idea]

That is, in order to achieve the above purpose, the present invention
As a result of various studies on synthetic resin materials for gloves, we have used polycarbonate resin, which has particularly high heat resistance, low heat shrinkage, and high elasticity.

[Example of idea]

Hereinafter, the present invention will be explained based on an embodiment shown in the drawings.

In the figure, 1 is a chassis made of, for example, a heat-resistant synthetic resin material. This chassis 1 is constructed by integrally protruding, for example, a cylindrical cylindrical part 3 at the center of a disc-shaped mounting plate 2.
A threaded portion 4 for attaching a cap is provided on the outer peripheral surface of the distal end side. Then, two parts of this threaded part 4 facing each other
At these locations, mounting grooves 5, 5 are provided which are cut to a predetermined length along the axial direction, and one end of these mounting grooves 5, 5 is opened at the distal end edge of the cylindrical portion 3. This threaded portion 4 has a cap 6 such as the E26 type.
It is screwed on. A base 7 is attached to such a chassis 1. The base 7 is approximately bowl-shaped, and has two opposing opening edges at one end.
Support protrusions 8, 8 are protrudingly provided in the mounting grooves 5, 5 of the cylindrical portion 3, and are removably fitted into the mounting grooves 5, 5 through an opening at one end thereof. Therefore, this base 7 has supporting protrusions 8,8
is mounted on the cylindrical part 3 so as to fit into the mounting grooves 5, 5, and then the cap 6 is screwed onto the threaded part 4, and the opening edge of the cap 6 is attached to the circumferential surface of one end of the base 7 on the opening side. By being attached, it is fixed so that it cannot be moved. With this fixation, the mounting plate 2 is attached to the base 7.
A position deviated from the other end opening to the base 6 side by a predetermined distance, that is, it enters the base 7, and its outer periphery is the base 7.
It is positioned in contact with the inner surface and partitions the inside of the base 7 and the inside of the glove, which will be described later. Note that a plurality of vent holes 9 are formed on the circumferential surface of the base 7 to allow communication between the inside and outside of the base 7.

A substantially hemispherical globe 10 is attached to the opening edge of the other end of the base 7. This glove 10 uses polycarbonate resin, which has particularly excellent heat resistance among synthetic resin materials, has a low heat shrinkage rate, and is highly elastic, and contains a fine powder light diffusing material in the polycarbonate resin. By mixing it, it is colored light-diffusing white. In the glove 10 in this embodiment, the wall thickness is continuously changed such that the wall thickness t ₁ on the top side is thicker than the wall thickness t ₂ on the side around the opening. That is, the above-mentioned globe 10 is formed into a tube shape by heating and softening polycarbonate resin mixed with a light-diffusing material, and the tube is placed in a mold while it is still soft, and air is blown into the tube to expand it. The outer surface is brought into close contact with the inner surface of the mold to form the above-mentioned shape. When air is blown into the tube in this way, the degree of expansion of the tube on the side directly facing the inlet generally decreases and the wall thickness increases, but conversely, the degree of expansion increases on the side surrounding the inlet. There is a tendency for the wall thickness to become thinner, and this embodiment cleverly takes advantage of the above-mentioned phenomenon. Such a glove 10 has locking claw portions 11 integrally protruding from a plurality of locations around the opening periphery.
It is removably fixed to the base 7 by elastically fitting into locking protrusions 12 provided corresponding to the periphery of the opening at the other end of the base 7.

On the other hand, a recess 13 that is recessed toward the cylindrical portion 3 is integrally provided in the center of the mounting plate 2, and a peripheral wall of the recess 13 located inside the base 7 has a
A plurality of communication ports 14 communicating with the inside of the base 7 are provided. A stabilizer 15 is attached to this recess 13. The stabilizer 15 is fixed such that, for example, the end on the side from which the conductive wire is led out enters the recess 13, and the remaining portion is present within the globe 10. In addition, the surface of the mounting plate 2 on the globe 10 side forms a light reflecting surface as a preferable example, and on this reflecting surface side, a curved pipe shape is positioned inside the globe 10 and surrounds the stabilizer 15. A fluorescent lamp 16 is attached. The bulb 17 of this curved tube-shaped fluorescent lamp 16 is curved as follows. That is, a straight glass bulb is bent at the center into a substantially U-shape to form a bent part 17a, and both ends of the bent part 17a are bent into a substantially U-shape at the center thereof.
It is formed by curving into a substantially U-shape in a direction substantially perpendicular to the plane containing the shape, and is called a saddle-shaped bulb because its overall shape resembles a saddle for horseback riding. Electrode filaments 18, 18 are fixed to both ends of such a bent tube-shaped bulb 17, respectively, and the bulb 17 is fixed in a posture with the bent portion 17a and both ends facing toward the mounting plate 2. .

A phosphor film is coated on the inner surface of the bulb 17, and a predetermined amount of mercury and an inert gas are sealed inside. It goes without saying that the electrode filaments 18, 18 are connected to the cap 6 via the ballast 15 and a lighting tube (not shown).

Therefore, in the fluorescent lamp device having such a configuration, when the cap 6 is screwed into the socket on the lighting equipment side and the fluorescent lamp 16 is turned on, the light from the fluorescent lamp 16 passes through the globe 10 and is emitted to the outside. It is released towards the direction. At this time, the fluorescent lamp 16 and the ballast 15 generate heat within the globe 10, but since polycarbonate resin with high heat resistance is used as the synthetic resin material for the globe 10, the heat resistance of the globe 10 is improved and the globe 10 is turned on. Even if the thermal influence from the intermediate ballast 15 and the fluorescent lamp 16 becomes large, discoloration and deformation of the glove 10 can be prevented.

Moreover, polycarbonate resin is not only highly elastic, but also has a low heat shrinkage rate, so it is suitable for glove 1.
0 and the base 7, a fitting structure in which the locking claw portion 11 and the protrusion 12 fit together as shown in the above embodiment can be adopted. In this case, in addition to the above-mentioned high heat resistance, deformation of the locking claw portion 11 on the glove 10 side is suppressed even if it is affected by heat from the fluorescent lamp 16 side. Therefore, there is an advantage that rattling of the fitting portion can be prevented, and the connection between the glove 10 and the base 7 can be reliably performed over a long period of time by mere mechanical fitting.

Furthermore, due to its high heat resistance, it is possible to bring the inner surface of the globe 10 closer to the fluorescent lamp 16 and the ballast 15, which allows the globe 10 to be made smaller in diameter, making it convenient for use as an alternative to incandescent light bulbs. .

In addition, in the above embodiment, the fluorescent lamp and ballast were mounted on the mounting plate that partitions the base side and the glove side, but this mounting plate is not necessarily necessary, and the point is that the fluorescent lamp and ballast are It is sufficient if it is housed in a space surrounded by the base and the glove.

[Effect of idea]

According to the invention described in detail above, since the glove that serves as the light emitting surface is made of polycarbonate resin, the heat resistance of the glove is improved, and the glove will not discolor even if it is affected by heat from the fluorescent lamp or ballast while it is on. Deformation can be prevented and the appearance is advantageous. In addition, polycarbonate resin is highly elastic and has a low thermal shrinkage rate, so a mechanical fitting structure can be used to connect it to the base, and the fitting part will not wobble even if the glove becomes hot during lighting. Thus, the base and the glove can be reliably connected for a long period of time through mere mechanical fitting. In addition, because the globe has high heat resistance, it is possible to bring its inner surface closer to the fluorescent lamp or ballast, which allows the globe to be made as small as an incandescent light bulb, making it possible to reduce the size of this type of fluorescent lamp device. Polycarbonate resin is suitable as the material for the glove.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIGS. 1 and 2 are sectional views viewed from different directions. 6...Base, 7...Base, 10...Glove, 17...Bent pipe valve, 18...Electrode.

Claims (1)

[Scope of utility model registration request] A base having a cap, a globe fitted and fixed to the base, and a straight tube valve with electrodes at both ends, which is housed in a space surrounded by the base and the globe, with an approximately U shape in the center. A bent tube-shaped bulb having both ends curved in a substantially U-shape in a direction substantially orthogonal to a plane including the U-shape, and the space for lighting the bent tube-shaped bulb. 1. A fluorescent lamp device comprising: a ballast housed within the lamp; and wherein the globe is made of polycarbonate resin.