JPS593860A - Curved fluorescent lamp - Google Patents

Abstract

PURPOSE:To equalize the illuminaton distribution of a curved fluorescent lamp, which consists of plural circular parts coaxially arranged at different levels, by minimizing optical absorption by a base by devising its design. CONSTITUTION:A curved fluorescent lamp consists of two circular parts 1 and 2 which are coaxially arranged at different levels. The circular part 1 consists of two semi-circular parts 3 and 4 which are arranged on the same plane. The semi-circular parts 3 and 4 have electrodes 5 and 6 at their one ends, and the electrodes 5 and 6 are positioned opposed to one another. The other ends of the semi-circular parts 3 and 4 are connected to the circular part 2 through connection bulbs. The connection bubls are constituted of almost U-shaped parts 7 and 8 having the same diameter as the circular parts 1 and 2. Thus, the two circular pats 1 and 2 constitute a discharge path through the U-shaped parts 7 and 8.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a curved tube-shaped fluorescent lamp having a plurality of coaxial thyroid sections.

[Technical background of the invention and its problems]

Fluorescent lamps are known to be suitable as power-saving lamps because they have superior light efficiency and can be used with lower power than general incandescent lamps.

In particular, annular fluorescent lamps are close to the shape of a willow, which is said to be the ideal shape for a light source, and compared to the monotonous, rigid illumination of straight tube fluorescent lamps, they provide much more varied and tasteful illumination. It is widely used for general lighting such as home use.

However, since it is often not possible to obtain the desired brightness with just one annular fluorescent lamp, a plurality of them are usually incorporated into a two-lamp or multi-lamp lighting fixture. This not only increases the size of the lighting fixture, but also imposes restrictions on the shape of the lighting fixture. Moreover, depending on the circuit configuration, it is necessary to install ballasts in a number corresponding to the number of lamps, which increases the weight of the lighting equipment as a whole and increases costs.

In order to solve the above-mentioned problems, the present inventors developed a fluorescent lamp shown in FIG. 1 and filed an application earlier.

In other words, by bending one or more places between both ends of the straight pulp into a substantially U-shape, it is possible to connect the bent part and both ends or the bent part to the bent part. A bent tube-shaped pulp is formed in which the shaped portions are arranged in parallel with each other, and the straight portion of the bent tube-shaped bulb is bent in a direction substantially perpendicular to the plane containing the above-mentioned U-shape to form an annular shape. This is a fluorescent lamp with a plurality of circular ring portions arranged coaxially in parallel.

According to this structure, a plurality of annular portions are coaxially arranged in parallel, so that the whole structure is compact. In addition, even in lighting equipment that conventionally required multiple annular fluorescent lamps to obtain the desired brightness, the desired brightness can be obtained with a single curved fluorescent lamp, so it is possible to provide a stable lamp on the lighting equipment side. Only one circuit component such as a device is required.

Therefore, it is possible to reduce the weight and cost of the lighting equipment, and since the lamp itself is compact, there are excellent effects such as the ability to diversify the design of the lighting equipment.

Furthermore, since the curved tube type fluorescent lamp is compact, it is possible to configure the entire lamp to be about the same size as a 60-100W class incandescent lamp. If the light lamp is integrated with a screw-in base such as the E26 type and lighting and starting circuit components such as a ballast and lighting tube, it can be screwed into an existing socket for an incandescent light bulb and turned on. be able to. This makes it compatible with incandescent bulbs,
Can be used for lighting instead of incandescent light bulbs.

By the way, in order to be able to replace the above-mentioned curved tube type fluorescent lamp with a generally popular annular fluorescent lamp, it is necessary to improve the design of the cap to make the illuminance distribution uniform.

[Purpose of the invention]

The present invention was made in view of the above-mentioned circumstances, and its purpose is to suppress light absorption by the cap and to make the front illuminance distribution uniform.

[Summary of the invention]

In the curved tube type fluorescent lamp of the present invention, the pulp constituting the plurality of annular parts is arranged coaxially, and the knobs are connected by a connecting pulp to form a single curved tube knob. Attach electrodes to form a single discharge path.

In addition, both ends are arranged so as to face each other within the same annular part. As a result, the curved fluorescent lamp can reduce the loss of light absorption due to the base, and can also make the illuminance distribution uniform.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 2 and 3. FIG. 2 is a perspective view showing an embodiment of the curved tube-shaped round lamp of the present invention. This curved tube fluorescent lamp has 2
The two annular parts 1.2 are arranged coaxially and in different steps. One annular portion 1 has two partial annular portions 3 and 4 arranged on the same plane to form one annular portion l. The partial annular parts 3, 4 further have electrodes 5, 6 at one end.

Moreover, the electrodes 5 and 6 are arranged to face each other. Each of the partial annular portions 3.4 is connected at its other end to the other annular portion 2 via a connecting knob.This connection/curve is bent into a substantially U-shape in this embodiment. ,
U-shaped part 7 whose pulp diameter is the same as that of the annular part 1.2
, 8.

The two annular portions 1, 2 are therefore configured to form a single discharge path via the U-shaped portion 7.8.

The inner surfaces of the annular portion 1.2 and the U-shaped portions 7 and 8 are coated with a phosphor, and a small amount of mercury is sealed together with an inert gas inside the bent tube pulp, making it appear as if there were two annular fluorescent lamps. It has a structure in which they are arranged in different stages.

This curved tube-shaped fluorescent lamp is bent as follows. That is, a straight pulp tube with a phosphor coated on its inner surface and electrodes 5 and 6 attached to both ends of the pulp tube 9 is bent into a U-shape at both ends to form U-shaped parts 7 and 8, as shown in FIG. do. At this time, the electrode 5,
6 are facing each other. Next, this bent pipe valve is
In the direction perpendicular to the plane containing the character parts 7 and 8, 1! Curved into a W shape. Thereafter, through an evacuation process and the like, a curved tube-shaped fluorescent lamp shown in FIG. 2 is obtained.

The above-mentioned curved tube fluorescent lamp has the characteristics of the curved tube fluorescent lamp shown in Fig. 1, which was developed earlier, that is, one fluorescent lamp can provide the brightness of two fluorescent lamps, and the circuit device is It has the following advantages: only one set is required, the lighting equipment can be made lighter, and it can be made more compact.

That is, firstly, since the ends having the electrodes 5 and 6 face each other, there is an advantage that the base structure used in the conventional annular fluorescent lamp can be used as is. In particular, when the annular portion is a perfect circle as in the above embodiment, the cap of the annular fluorescent lamp can be used as is.

Second, because the cap is attached to only one annular portion and the cap is not attached to the other annular portion, the brightness distribution of the annular portion to which the cap is not attached is more uniform than in the conventional case. Therefore, the illuminance distribution on the irradiated surface facing the annular portion is made more uniform than in the conventional case. This advantage can be obtained even if the cap is attached. That is, the brightness is low! Since the extreme part is not exposed to the irradiated surface, a more uniform brightness distribution and illuminance distribution can be obtained compared to the conventional method.

Thirdly, the light absorption loss due to the cap when the cap is attached is small. This is because small caps are available.

Furthermore, in the case of the above embodiment, the fourth advantage is that the two annular parts are juxtaposed and the diameters of the annular parts are the same, so that the blackening of the tube end at the end of its life can be avoided! It can be hidden by an annular part that does not include a pole part.

[Other Examples]

Although the embodiment described above has a shape in which two annular portions are coaxially arranged side by side, it may be in a shape in which three annular portions are coaxially arranged side by side as shown in FIG. This curved tube-shaped fluorescent lamp is made by bending straight tube pulp into a U-shape at 1/6 of the total length from the end, as shown in Figure 5, and then inserting the bulb from the U-shaped bent part. A U-shaped bend is formed in a direction opposite to the first U-shaped bending direction at a portion of 1/6 of the total length. As a result, as shown in FIG. 5, a bent pipe pulp is formed in the shape of two 8-shaped figures lined up in line symmetry on one plane. Next, both ends of the tube ring bulb are bent into an annular shape in a direction perpendicular to the plane containing the bulb. As a result, a curved tube-shaped fluorescent lamp having three annular portions arranged coaxially and side by side is obtained.

This curved tube type fluorescent lamp also has first to fourth dips as in the first embodiment.

Further, in the present invention, the ring diameters of the two annular portions can be made different. This is shown in FIGS. 6(a) and (b).

FIG. 6(a) is a front view of a curved tube-shaped fluorescent lamp in which the ring diameters of the two annular portions are different, and FIG. 6(b) is a plan view thereof.

This embodiment also has the first to third advantages of the first embodiment. Furthermore, in this embodiment, since the ring diameters of the annular portions are different, the light emitted in the direction perpendicular to the plane containing the annular portions.

This has the advantage that mutual absorption of the lamps is eliminated and the illumination intensity in the vertical direction is increased.

Yet another embodiment is illustrated in FIGS. 7(a) and 7(t)).

FIG. 7(a) is a front view, and FIG. 7(1)) is a plan view. This curved tube-shaped fluorescent lamp uses a thin tube for the connecting pulp 7.8 that connects two annular parts.

The actual example with ``m-'' also has the same advantages as the example with ``m-''.

Incidentally, in all of the embodiments described above, the annular portion was a perfect circle.

The shape is not necessarily limited to this, and may be an ellipse or other shape. Further, the curved fluorescent lamp of the present invention can be used not only to replace an annular fluorescent lamp, but also to replace an incandescent light bulb by being integrated with a ballast or the like.

〔Effect of the invention〕

As detailed above, according to the present invention, one fluorescent lamp can provide the brightness of two fluorescent lamps, only one circuit device is required, the lighting equipment can be lightweight, and it is compact. In addition to being able to create Firstly, the base structure of a conventional annular fluorescent lamp can be used for the base structure, secondly, the illuminance on the surface facing the thyroid which does not have an end can be made uniform, and firstly, the base structure can be used without the base. This has the advantage that light absorption by the cap when the cap is worn is reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a curved fluorescent lamp that is the premise of the present invention, FIG. 2 is a perspective view of a curved fluorescent lamp according to the first embodiment of the present invention, and FIG. 3 is an illustration of the second embodiment. 4 is a perspective view of the curved tube fluorescent lamp of the second embodiment, and FIG. 5 is a manufacturing explanation of the curved tube fluorescent lamp shown in FIG. 4. Explanatory diagram. 6(a) and 6(b) show a curved tube-shaped fluorescent lamp of the third embodiment, FIG. 6(a) is a front view thereof, and FIG.
b) is a plan view thereof, FIG. 7(a), Φ) is a curved tube-shaped fluorescent lamp of the fourth embodiment, FIG. 7(a) is a front view thereof, and FIG. 7(b) is a FIG. 1.2...Annular part, 3,4...Partial annular part. 5.6... Electrode, 7,8... Connected pulp. Agent Patent Attorney Noriyuki Chika (and 1 other person) Figure 1 Figure 2 Figure 4 Figure 6 Figure 6 Figure 7 ( 7

Claims (3)

[Claims] (1) One or more pulps are arranged in an annular shape to form one annular part, a plurality of these annular parts are coaxially arranged in parallel, and the plurality of annular parts are connected by a connecting pulp, and both ends The bent tube bulbs are arranged so as to face each other within the same annular portion to form one bent tube pulp, and electrodes are attached to both ends of the bent tube bulb to form one discharge path for the internal pressure of the bent tube pulp. A curved tube-shaped fluorescent lamp. (2) The connecting pulp has the same diameter as the pulp of the annular portion. A curved tube-shaped fluorescent lamp according to claim (1), characterized in that it has a substantially U-shape that smoothly connects from the annular portion. (3) The plurality of annular portions are circular and have the same radius.
2) The curved tube-shaped fluorescent lamp described in item 2).