JPH0241863B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a fluorescent lamp device that can be used in place of an incandescent light bulb.

(Prior Art) Since fluorescent lamps can be used with lower power consumption than general incandescent lamps, the applicant has recently developed a light bulb-shaped fluorescent lamp device that can be used by being screwed into an existing incandescent lamp socket. has been put into practical use and is becoming widespread. This one is E26 at one end
A cover that has a mold-like cap and is open at the other end houses lighting circuit components such as a ballast and a lighting tube, and a curved tube-shaped fluorescent lamp is installed at the other end of the cover. A lamp is arranged, and the outer periphery of this curved tube-shaped fluorescent lamp is covered by a globe which is placed on the opening at the other end of the cover.

By the way, in the case of a structure in which a fluorescent lamp and a ballast are installed in the same sealed space, the ambient temperature of the fluorescent lamp rises due to the radiant heat from the ballast, and this thermal effect causes the internal temperature of the lamp to rise. It is conceivable that the mercury vapor pressure of the mercury vapor pressure becomes higher than the optimum value, resulting in a decrease in the intensity of ultraviolet rays and visible rays. As a countermeasure to this, multiple ventilation holes are usually created on the circumferential surface of the cover or glove to allow outside air to flow through these holes, increasing the heat dissipation effect inside the device, and
By bringing outside air into contact with the fluorescent lamp, the coldest part is formed in a part of the fluorescent lamp. By forming the coldest part in a part of the fluorescent lamp in this way, all the excess mercury in the lamp will condense in this coldest part, preventing the vapor pressure inside the tube from increasing and improving the light output. It has the advantage of being sustainable.

(Problem to be Solved by the Invention) However, since the above-mentioned vent hole for introducing outside air has a relatively large opening area, there is a risk that dust, insects, etc. may enter the cover or glove through the vent hole, and the appearance may be affected. There remains a problem. Another possible measure is to place the curved fluorescent lamp away from the ballast, but this would require a larger glove or cover, which would hinder the overall compactness of the device. There is.

The present invention was developed based on the above circumstances, and it is possible to form a cool part at the end of a curved fluorescent lamp, maintain good light output, and furthermore, it is possible to form a cool part at the end of a curved fluorescent lamp. It is an object of the present invention to provide a fluorescent lamp device in which the opening area of the ventilation holes provided in the lamp is small, the appearance is improved, and the overall device can be made more compact.

[Structure of the Invention] (Means and Effects for Solving the Problems) In order to achieve the above object, the present invention has a tip portion led out from an end of a curved fluorescent lamp, and a tip portion extending from the end portion of the curved fluorescent lamp in the direction of the bulb axis. According to the present invention, the tip portion is bent in a direction in which the tube wall temperature of the tip portion is lower than that when the tip portion is extended.
The temperature of the chip can be lowered.

(Example) The present invention will be described below based on an example shown in the drawings.

In the figure, reference numeral 1 denotes a main body of the apparatus made of synthetic resin, and the main body 1 is configured to be separated into a chassis 2 and a cover 3. The chassis 2 has a cylindrical part 4 at one end, and a male threaded part 5 for attaching a base is provided on the outer circumferential surface of the cylindrical part 4. Mounting grooves 6, 6 are provided along the . One end of these mounting grooves 6, 6 is opened at the tip edge of the cylindrical portion 4. Further, a pair of support stays 7, 7 are protruded from the base end opening of the cylindrical portion 4, and these support stays 7,
Support plates 8, 8 are integrally molded in parallel to each other at the tip of 7, and these support plates 8,
A chiyoke coil type ballast 9 is installed between the two.

On the other hand, the cover 3 has a shape that is constricted at one end and widened at the other end.
An insertion hole 10 through which the cylindrical portion 4 can be inserted is provided at the bottom of one end of the cover 3, and the mounting groove 6,
Locking protrusions 11, 11 that lock onto the holder 6 are provided in a protruding manner. A cylindrical portion 4 is inserted into the insertion hole 10 from the other end opening 12 side of the cover 3, and a screw-in type cap 13 such as an E26 type is inserted into the male threaded portion 5 of the cylindrical portion 4. It is screwed on. The cap 13 holds locking protrusions 11, 11 between the opening edge and the terminal ends of the mounting grooves 6, 6, and the chassis 2 and the cover 3 are connected by this grip. .

Due to this connection, the cap 13 is connected to one end of the device main body 1, and the periphery of the stabilizer 9 is connected to the cover 3.
covered by.

A curved tube-shaped fluorescent lamp 14 having a generally saddle shape is attached to the support plates 8, 8. This curved tube-shaped fluorescent lamp 14 has a straight tube-shaped bulb bent into a substantially U-shape at the center between both ends thereof to form a central curved portion 15.
A pair of both end bent portions 16, 16 are formed by bending the center between 5 and both ends into a substantially U shape in a direction substantially orthogonal to a plane including the U shape, and these two bending steps are performed. As a result, both end portions and the central curved portion 15 are bent into a generally saddle shape in which they are positioned adjacent to each other in the same direction. Such a curved tube-shaped fluorescent lamp 14 is fixed with both ends and the central curved portion 15 facing toward the base 13. Although not shown in detail in this embodiment, the central curved portion 15 is It is fixed by being engaged with support claws 17 provided on one support plate 8. Due to this fixation, both ends and the central curved part 15 of the curved fluorescent lamp 14 enter into the cover 3 and are closely opposed to both sides of the ballast 9, and are also brought close to the inner circumferential surface of the cover 3. ing. A holding wall 18 is provided on the other supporting plate 8 in a protruding manner, and a lighting tube 19 as a starting element and a capacitor 20 for noise prevention are attached to this holding wall 18.

The other end opening 12 of the cover 3 is covered with a spherical globe 21 having translucent properties, and this globe 21 covers the periphery of the curved fluorescent lamp 14, giving the entire device a white appearance. It resembles a ball-shaped incandescent light bulb. Note that ventilation holes 23 are provided on the circumferential surface of the cover 3 to communicate the inside and outside of the space 22 surrounded by the cover 3 and the glove 21.

Tip portions 25 and 26 are led out from the stems 24 and 24 sealed to both ends of the curved fluorescent lamp 14, respectively. One tip part 25 is led out from the valve end in the valve axis direction, and then moves away from the ballast 9 from the middle thereof, in this embodiment, in a preferable example, in a direction opposite to the central curved part 15 (in the X-axis direction). ) is bent at right angles. That is, this one tip part 25 is made by bending the exhaust pipe led out from the stem 24 in the above direction and then chipping it, and the length from this bending part to the sealing tip is set to 5 mm or more. . And this one tip part 25
The sealing tip is closely opposed to the inner circumferential surface of the cover 3, that is, the ventilation hole 23.

According to such a configuration, one of the tip portions 25 is bent in a direction away from the stabilizer 9, and the sealing tip is placed close to and opposed to the ventilation hole 23 of the cover 3. is less susceptible to the thermal influence of the ballast 9, and the ventilation hole 23
Since it is exposed to the outside air flowing in from the chip, it is locally efficiently cooled, and as a result, one chip
The coldest part is formed. In this way, the tip part 25
When the coldest part is formed, the mercury vapor pressure inside the lamp is determined by the temperature of the coldest part, and all excess mercury condenses in this coldest part, preventing the vapor pressure inside the tube from increasing. It is. Therefore, a decrease in optical output can be reliably prevented and lighting efficiency can be maintained at a high level.

This has been confirmed by experiments conducted by the present inventors, and FIG. 4 shows the experimental results. FIG. 4 shows a lamp in which the tip portion 25 is bent in the X-axis direction.
and a lamp in which the tip portion 25 is bent in the Y-axis direction which is perpendicular to the X-axis and on the other tip portion 25 side as shown by the imaginary line in FIG. When a conventional lamp in which the tip portion 25 extends in the Z-axis direction, which is the tube axis direction, is accommodated in the globe 21 as described above, and the tip portion 25 is bent, the tip portion 25 extends from the bent portion to the sealing tip. The optical characteristics were measured by changing the length of the chip 25 or, if the chip part 25 extends in the Z-axis direction, the total length within a range of 3 to 15 mm, and the changes in the total luminous flux of each were shown. It is something. That is, the characteristic curve A in FIG.
5 is bent in the X-axis direction, characteristic curve B shows the change in the total luminous flux obtained when the chip 25 is bent in the Y-axis direction, and the characteristic curve C shows the state of change in the total luminous flux in the conventional structure. As is clear from FIG. 4, when the tip portion 25 is bent in the X-axis and Y-axis directions, the total luminous flux is greatly improved compared to when the exhaust pipe is just chipped. It can be seen that if the section 25 is bent in the X-axis direction or its length is set to 5 mm or more, the variation in the total luminous flux is reduced and the total luminous flux is further improved, and the function of the coldest section is fully demonstrated. .

Note that the bending direction of the tip portion 25 is indicated by Y in FIG.
If the tip portion 25 is located within a range approximately 250° in the clockwise direction from the axis position, the effect of the coldest portion can be sufficiently exhibited, and the bending angle of the tip portion 25 is at least approximately 30° with respect to the Z axis. More than that is fine.

By simply bending and extending the tip portion 25 in this way, the coldest part is reliably formed in the tip portion 25, so the number of ventilation holes 23 provided on the circumferential surface of the cover 3 and the glove 21 can be reduced. This makes it possible to significantly reduce the opening area, improve the appearance of the entire device, and prevent dust, insects, etc. from entering the glove 21 and the cover 3. Moreover, even though the tip portion 25 is extended, the tip portion 25 is bent in a direction that intersects the Z-axis, in other words, the axial direction of the base 13, so that it does not fit inside the cover 3 or the glove 21. Chip part 25
There is no need to secure special space to accommodate them. Therefore, a limited narrow space can be used effectively, so there is no need to increase the size of the glove 21 or the cover 3, and there are advantages such as the ability to make the entire device more compact.

Note that curved tube-shaped fluorescent lamps are not limited to saddle-shaped lamps.
For example, it may be simply bent into a U-shape or may have a loop portion formed between both ends.

[Effects of the Invention] As detailed above, according to the present invention, the tip led out from the end of the fluorescent lamp is bent in the direction of lower temperature, so that a low temperature portion is formed in this tip. As a result, the mercury vapor pressure inside the tube is prevented from becoming high, and the light output can be maintained at a high efficiency. In addition, there is no need to actively guide outside air into the device body or glove as in the past, so the opening area of the ventilation holes in the glove or device body can be reduced, improving the appearance and improving the inside of the glove. It is possible to prevent dust, insects, etc. from entering.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is a cross-sectional view of the whole, FIG. 2 is a cross-sectional view taken along the line - in FIG. 1, and FIG. 3 is a plan view of a curved fluorescent lamp. 4
The figure is an explanatory diagram showing how the total luminous flux changes. 1... Entire device, 9... Ballast, 13... Base, 14... Bent tube fluorescent lamp, 15, 16...
...Curved section (center curved section, both end curved sections), 19,2
0...Circuit parts (lighting tube, capacitor), 21...
...Glove, 25...Tip section.

Claims (1)

[Scope of Claims] 1. Circuit parts for starting and lighting including a ballast are housed in a device main body having a cap at one end and an open end at the other end, and a fluorescent light is provided in the opening at the other end of the device main body. In a fluorescent lamp device in which a lamp is mounted with the end of the lamp facing the base, the tip led out from the end of the fluorescent lamp is configured to direct the tip in the direction of the bulb axis of the fluorescent lamp. 1. A fluorescent lamp device characterized in that the tip portion is bent in a direction in which the tube wall temperature of the tip portion is lower than that when the tip portion is extended. 2. The fluorescent lamp device according to claim 1, wherein the chip portion is bent in a direction away from the circuit component. 3. Claims characterized in that the tip portion is bent in a direction in which the tip portion approaches the device main body or, if the fluorescent lamp is covered with a glove, the inner peripheral surface of the device main body or the glove. The fluorescent lamp device according to item 1 or 2.