JPH0430761Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The present invention is a small fluorescent lamp that is approximately V-shaped and has multiple small bulbs interconnected to form one meandering discharge path. The present invention relates to devices, and particularly to a fluorescent lamp device with improved vertical light distribution characteristics.

(Prior Art) Conventionally, an example of this type of fluorescent lamp device is shown in FIG. 5, which has an approximately inverted truncated cone shape and is screwed into the small diameter end of a hollow cover 1 into a socket for an incandescent lamp. While the cap 2 is attached to the large diameter end of the cover 1, a valve mounting base 3 having a disk-shaped upper surface is attached.

A small fluorescent lamp 4 is erected on the bulb mounting base 3, and this fluorescent lamp 4 has, for example, three U-shaped small bulbs 5, 6, and 7 at their connecting ends 5a, 6a, and 7a. Connecting parts 8 and 9 are formed by blowing out the burner, etc., and the valves 5, 6, and 7 are airtightly and integrally connected through these connecting parts 8 and 9 so that they are arranged in an annular shape. The discharge paths in 5, 6, and 7 are integrally connected to form one meandering discharge path.

In this way, the integrated fluorescent lamp 4 is placed upside down on the bulb mounting base 3, and furthermore,
A pair of electrodes 10a, 10b are sealed at the ends of bulbs 5, 7 located at both ends of the fluorescent lamp 4, and mercury and rare gas are sealed inside each bulb 5, 6, 7. .

Each bulb 5, 6, 7 is formed by bending a straight glass bulb into a substantially U-shape, and a pair of legs 5c, 6 are provided on both sides of each U-shaped bent end 5b, 6b, 7b.
c, 7c.

Further, the radius of curvature of each U-shaped bent end 5b, 6b, 7b of each valve 5, 6, 7 is the same as that of each leg 5c, 6.
The diameters of the bulbs 5, 6, and 7 are set to be smaller than the diameters of the bulbs 5, 7c, and the bulbs 5, 6, and 7 are formed compactly, and a phosphor film made of phosphor is coated on the inner surface of each bulb 5, 6, and 7 over almost the entire length thereof. .

(Problems to be Solved by the Invention) However, in such a conventional fluorescent lamp device, the vertical light distribution is distributed as shown in FIG. ，
There is a problem in that the vertical illuminance in front of 7b is low.

That is, in the conventional fluorescent lamp device, each bulb 5, 6, 7 stands almost upright on the upper surface of the bulb mounting base 3, and each bulb 5, 6, 7 has its bent end portion 5b, 6b, 7b. Each pair of legs 5 from both ends
Since the bulbs c, 6c, and 7c are bent in a U-shape so as to extend vertically, the plane of the fluorescent lamp 4 is shaped like each U-shape of each bulb 5, 6, and 7, as shown in FIG. It is formed from each flat surface of the bent end portions 5b, 6b, 7b and each flat surface of each connecting portion 8, 9,
Legs 5c, 6c, and 7c of Nos. 6 and 7 are not included. In other words, each leg 5 of each valve 5, 6, 7
The luminous flux from c, 6c, 7c is transmitted to each bulb 5, 6, 7.
This shows that each of the bent ends 5b, 6b, and 7b hardly contributes to increasing the illuminance in front of the bent ends 5b, 6b, and 7b.

If the luminous flux of each of the legs 5c, 6c, and 7c does not contribute to the forward illuminance of the fluorescent lamp, this will greatly affect the vertical light distribution characteristics of the small fluorescent lamp 4, and for example, as shown in FIG. The vertical light distribution curve is greatly depressed inward at the portion indicating the illuminance in front of the fluorescent lamp 4, and a uniform light distribution cannot be obtained around the fluorescent lamp 4.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a fluorescent lamp device that can improve the vertical light distribution characteristics by increasing the vertical illumination in front of each bent end of the fluorescent lamp with a simple configuration.

[Structure of the idea]

(Means for solving the problem) The present invention aims to increase the flat area of the fluorescent lamp, and
This is intended to increase the illuminance in front of the fluorescent lamp, and is constructed as follows.

Two or more bulbs are bent into a substantially V-shape, and the connection ends of these bulbs are airtightly connected to each other to integrally connect the discharge paths within each bulb, and these V-shaped bulbs are inverted. They were placed on the valve mounting base at equal positions in the circumferential direction, and were tilted inward to stand upright.

(Function) Since each valve is bent almost in a V-shape,
The curvature at these V-shaped bent ends increases, causing the legs of each valve to open in a V-shape, and since each valve is tilted inward, the flatness of each valve leg increases. Area increases. For this reason, the illuminance in front of the bulb is increased.

Further, since each bulb is arranged at equal positions in the circumferential direction on the bulb mounting base, the symmetry in terms of light distribution characteristics is improved.

Therefore, according to the invention. Since it is possible to increase the illuminance in front of the bulb while maintaining good symmetry in the light distribution characteristics, it is possible to improve the light distribution characteristics of the fluorescent lamp as a whole.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 to 3.

FIG. 1 is a half-cut vertical cross-sectional view showing an embodiment of the present invention, and in the figure, the small diameter end (the first A base 22 is attached to the lower end (in the figure), which is screwed into a socket for an incandescent light bulb.

A bulb mounting base 23 having a disk on the top surface is fitted and fixed into the large diameter end (upper end in FIG. 1) of the cover 21, and a small fluorescent lamp 24 is mounted on the bulb mounting base 23. has been erected.

The fluorescent lamp 24 is, for example, a V-shaped small bulb 25, 26, 27, each of which has a connecting end 25.
2, 26a, 27a (see FIG. 2) by blowing a burner or the like, and connecting portions 28, 29 are formed between the valves 25, 26,
The discharge paths in the bulbs 25, 26, and 27 are integrally connected together in an airtight manner so as to be arranged in an annular shape, and a single meandering discharge path is formed by integrally connecting the discharge paths in the bulbs 25, 26, and 27.

The thus integrated fluorescent lamp 24 is inverted so that each bulb 25, 26, 27 has an inverted V shape, and is erected on the bulb mounting base 23.
Moreover, a pair of electrodes 30a, 30b are provided at the ends of the bulbs 25, 27 located at both ends of the fluorescent lamp 24.
is sealed, and mercury and rare gas are sealed inside.

Each bulb 25, 26, 27 is formed by bending a straight glass bulb into a substantially V shape, and a pair of left and right legs 25c, 26c are provided on both sides of each V-shaped bent end 25b, 26b, 27b. , 27c are spread in a V-shape.

Further, the radius of curvature of each V-shaped bent end portion 25b, 26b, 27b of each valve 25, 26, 27 is set smaller than the valve diameter of each leg portion 25c, 26c, 27c, etc., so that it is formed in a small size. Furthermore, a phosphor film made of phosphor is coated on the inner surface of each bulb 25, 26, 27 over almost the entire length thereof.

Incidentally, the burner blowout is performed at the adjacent connection ends 25a, 2 of the valves 25 to 27 to be connected.
The side peripheral walls of 6a and 27a are respectively heated and softened by the flame of a burner, the required amount of air is blown into one of the valves, the side peripheral walls of both valves are blown outward, and the blown-out protruding wall is They are connected by butting each other and fusing.

As shown in the plan view of FIG. 2, the valves 25, 26, 27 are arranged at equal positions in the circumferential direction on the valve mounting board 23, that is, the valves 25, 26, 27 are arranged at 120 degrees. Evenly spaced,
Moreover, each valve 25, 26, 27 is tilted inward, and each adjacent V-shaped bent end 25b, 27 is
The corner portions of the fluorescent lamps 25c, 27b are brought into contact with each other, and a portion of each leg portion 25c, 26c, 27c is projected onto a plane, thereby increasing the planar area of the fluorescent lamp 24 accordingly.

That is, each bulb 25, 2 of the fluorescent lamp 24
6 and 27 are bent into an approximately V shape, so that the V of each valve 25, 26, and 27 is bent as shown in FIG.
The curvature of the letter-shaped bent ends 25b, 26b, 27b is increased, and their planar area is slightly smaller than that of the fluorescent lamp 24 shown in FIG. 27c spreads his legs in a V shape,
Moreover, since it is tilted inward, each leg 25
The planar area of c, 26c, and 27c increases, and as a result, the planar area of the fluorescent lamp 24 increases.

Therefore, the vertical illuminance in front of the fluorescent lamp 24 increases by the increase in the planar area of the fluorescent lamp 24, and as shown in FIG.
The vertical light distribution curve becomes almost circular, and the light distribution characteristics are improved.

In addition, since the valves 25, 26, and 27 are erected with their V-shaped bent ends 25b, 26b, and 27b in contact with each other, the strength of the erecting is ensured, and the contact portions are Since the temperature increases when the lamp is lit, mercury buildup is prevented in that area.

In addition, although the number of valves is three in the above example,
The present invention can also be applied to cases where there are two or four or more pieces.

[Effect of idea]

As explained above, the present invention inverts two or more valves bent into a substantially V-shape and arranges them at equal positions in the circumferential direction on the valve mounting base, and
Since these bulbs are tilted toward the center of the bulb mounting base and connected, the planar area of the fluorescent lamp increases, and the illuminance in front of the fluorescent lamp increases accordingly, making it possible to improve light distribution characteristics.

[Brief explanation of the drawing]

FIG. 1 is a half-cut vertical sectional view of an embodiment of a fluorescent lamp device according to the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is a vertical light distribution characteristic diagram of the embodiment shown in FIG. 4 is a vertical light distribution characteristic diagram of the conventional fluorescent lamp device shown in FIG. 5, FIG. 5 is a perspective view of the conventional device, and FIG. 6 is a plan view of FIG. 5. 21... Cover, 22... Base, 23... Valve mounting base, 24... Fluorescent lamp, 25, 26,
27...Valve, 25a, 26a, 27a...V
Character-shaped bent ends, 25b, 26b, 27b... leg parts, 25c, 26c, 27c... connection parts.

Claims (1)

[Scope of utility model registration request] Two or more bulbs are bent into a substantially V-shape, and the connection ends of these bulbs are airtightly connected to each other to integrally connect the discharge paths within each bulb, and these V-shaped bulbs are inverted. A fluorescent lamp device characterized in that the lamps are arranged at equal positions in the circumferential direction on a bulb mounting base and are tilted inwardly.