JPS6110257Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[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] Fluorescent lamps have superior light efficiency and can be used with low power consumption compared to general incandescent lamps, so they have been designed with screw-in caps such as the E ₂₆ type, which are commonly used in general incandescent lamps. The applicant has developed a fluorescent lamp device that is attached to an envelope and has a lighting circuit such as a ballast built into the envelope to achieve compatibility with general incandescent light bulbs. . [Problems in the Background Art] However, the efficiency of fluorescent lamps is greatly affected by the ambient temperature, and when the fluorescent lamp is housed in the envelope together with the lighting circuit components as described above, the efficiency of the fluorescent lamps and lighting circuit components is reduced. The disadvantage is that the heat generated is trapped within the envelope, thereby reducing the efficiency of the fluorescent lamp. That is, the efficiency of a fluorescent lamp is determined by the temperature of the coldest part of the tube wall of the lamp, but there is a drawback in that the temperature of this coldest part becomes extremely high as the ambient temperature within the envelope increases. [Purpose of the invention] The present invention was devised in view of the above drawbacks, and its purpose is to provide an improved fluorescent lamp device that lowers the temperature of the coldest part of the tube wall of a fluorescent lamp housed in an envelope. It's about doing. [Summary of the invention] That is, the present invention relates to a fluorescent lamp device in which a fluorescent lamp and lighting circuit components are housed in an envelope having a base, and the thickness of the top side of the globe that constitutes a part of the surrounding air is reduced. By making the wall thinner than the base side, the mercury vapor pressure of the fluorescent lamp can be maintained appropriately and a decrease in efficiency can be prevented. [Embodiment of the invention] The present invention will be described below based on an embodiment shown in the drawings. In the figure, 1 is a chassis, which is molded from, for example, a heat-resistant synthetic resin material. This chassis 1 is provided with a cylindrical portion 2 at one end, and a threaded portion 3 for attaching a base is provided on the outer circumferential surface of the distal end side of the cylindrical portion 2. Attachment grooves 4, 4 are formed along the axial direction at two opposing locations on the circumferential surface of the cylindrical portion 2, and one end of these attachment grooves 4, 4 is connected to the tip opening edge of the cylindrical portion 2. It is open to A base 5 constituting a part of the envelope is attached to such a cylindrical portion 2. The base 5 is approximately bowl-shaped, and the mounting grooves 4, 4 are provided at two opposing locations on one end of the opening edge.
Support protrusions 6, 6 which are removably fitted through an opening at one end thereof are protruded therein. Therefore, in order to attach the base 5 to the cylindrical part 2, the support protrusions 6, 6 are fitted into the mounting grooves 4, 4, and the base 7, such as the E ₂₆ type for incandescent light bulbs, is attached to the threaded part 3. Screwed on,
The opening edge of the cap 7 is engaged with the circumferential surface on the opening side of one end of the base 5, and the supporting protrusions 6, 6 are inserted into the mounting groove 4,
It is designed to be fixed by pressing it against the terminal end of 4. Further, the opening edge of the other end of the base 5 is covered with a globe 9 which together with the base 5 constitutes an envelope. This globe 9 has an opening 8 at one end and has a substantially spherical shape, and is preferably made of polycarbonate resin, which is colored light-diffusing white by mixing a light-diffusing material into the resin. This is what I did. The glove 9 is provided with locking claws 10 at a plurality of locations on the opening edge of the glove 9.
... are removably fixed by being locked to locking protrusions 11 provided at a plurality of locations on the opening edge of the other end of the base 5. The thickness of the top side of the glove 9 is t ₁ 0.3 to 1
The wall thickness of the glove 9 is continuously changed so that the wall thickness t ₂ on the peripheral side of the opening becomes approximately 1.5 mm. That is, the above-mentioned globe 9 is formed into a tube shape by heating and softening polycarbonate resin mixed with a light-diffusing material, and this 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. On the other hand, two portions of the proximal edge of the cylindrical portion 2 facing each other
At this point, arm portions 12, 12 protrude in an inclined manner so as to expand toward the glove 9 side.
A mounting body 13 is integrally formed between the distal ends of these arm portions 12, 12. This mounting body 13 has a substantially rectangular plate shape, and its arm portion 1
A through hole 14 is formed in the center portion located between 2 and 12. On the glove side surface of the mounting body 13, substantially U-shaped fitting walls 15, 15 are protruded so as to be spaced apart from each other and face each other with the through hole 14 in between. A ballast 16, which is one of the lighting circuit components, is fitted between the fitting walls 15, 15, and both ends of the ballast 16 on the base 5 side are clamped and fixed. And the ballast 16 has a lead wire 17a,
It is attached so that the side from which 17b is led out faces the base 5 side, and the other parts are present inside the glove 9. Note that the protruding height L of the fitting wall portions 15, 15 is set to approximately 25% of the height l of the stabilizer 16. Furthermore, ribs 18, 18 are provided on the opposing surfaces of the arm portions 12, 12, respectively, and one end of these ribs 18, 18 comes into contact with the surface of the base 5 side of the stabilizer 16 to prevent it. In addition to holding the arm portions 12, it also serves to reinforce the arm portions 12, 12. A curved tube-shaped fluorescent lamp 19 is mounted on the mounting body 13 so as to surround the ballast 16. The bulb 20 of this curved fluorescent lamp 19 is curved as follows. That is, a straight tube-shaped glass bulb is bent into a substantially U-shape at its center to form the first bending section 2.
1a, and both ends thereof were bent into a substantially U-shape in a direction substantially orthogonal to a plane including the above-mentioned U-shape to form second curved portions 21b, 21b, and the whole was formed into a roughly saddle shape. It is something. Such a curved pipe-shaped valve 20 has both ends and the first
The bent portion 21a is mounted with the bent portion 21a facing the mounting body 13, and in this embodiment, the above-mentioned both ends and the first
The curved portions 21a are each supported. To explain this support structure, the mounting body 13 has a locking arm 22 and both end portions that support the first curved portion 21a and are spaced apart in a direction perpendicular to the opposing direction of the fitting walls 15, 15. A support piece 23 for support is provided integrally. The locking arm 22 is integrally provided with an extension plate 24 extending from one peripheral edge of the through hole 14 toward the cylindrical portion 2 side, and has a substantially L-shape. The locking arm 22 is adapted to removably hold the circumferential surface of the curved portion 21 between its inner surface and the extension plate 24. Further, the support piece 23 extends in the shape of a flange with a step on the side of the cylindrical portion 2 from the surface of the attachment body 13 on the glove 9 side. Furthermore, both ends of this support piece 23 form extension parts 25, 25 that extend integrally in an arc shape within the same plane, and both ends of the valve 20 are positioned on these extension parts 25, 25. It's becoming like that. Therefore, when the curved pipe valve 20 is attached to the mounting body 13, the first curved portion 21a and both end portions are located close to each other on both sides of the stabilizer 16.
Heat shield wall portions 26a and 26b are integrally provided on the mounting body 13 so as to be located between the ballast 16, both ends of the valve 20, and the first curved portion 21a. That is, one heat shielding wall portion 26a
is formed by extending the upper edge of the extension plate 24 toward the glove 9 side, and the other heat shielding wall portion 26b is formed by extending the periphery of the through hole 14 directly facing the extension plate 24 into a plate shape toward the glove 9 side. These heat shield wall portions 26a and 26b extend to the ballast 16.
Radiant heat is prevented from acting on the first curved portion 21a and both ends. Further, a mounting hole 27 is formed in the support piece 23 so as to be located outside the heat shielding wall portion 26b and between both ends of the curved tube-shaped valve 20.
Two opposing parts of the circumferential edge of the mounting hole 27 on the glove 9 side form a support wall portion 28 that projects in the direction of the glove 9 with an arcuate cross section.
A lighting tube 29 serving as a starter, which is one of the lighting circuit components, is fitted into the support wall portion 7 and the support wall portion 28 . The lighting tube 29 is immovably held by the support wall 28, and the conductive wire 30
The ends on the side where a and 30b are led out are present in the mounting hole 27. Conductive wire 30 of this lighting tube 29
a and 30b are connected in parallel to the capacitor 31 and to one of the external conductors 33a and 34a led out from the electrode filaments 32 and 32 at both ends of the bulb 20, respectively. The other external conductive wires 33b and 34b led out from the electrode filaments 32 and 32 are connected to the opening edge of the base 7 and one lead wire 17a of the ballast 16, respectively.
It is connected to. In this case, the external conducting wire 34b to be connected to the lead wire 17a is wound around one turn around the circumferential surface of one of the protrusions 35, 35 protruding from the support piece 23, and then wound into a one-turn loop shape, for example. By winding to form the loop portion 36, the end portion connected to the lead wire 17a is tensioned in a direction away from the lead wire 17a. In this embodiment, the lead wire 17a
When soldering the external conductor 34b to the eutectic point,
A silver-lead alloy with an angle of around 180° is used. The other lead wire 17b of the stabilizer 16 is connected to the base 7.
It is connected to the eyelet terminal of the A phosphor film is coated on the inner surface of the curved tube-shaped bulb 20, and a predetermined amount of mercury and inert gas are sealed inside. The fluorescent lamp device having the above configuration is attached to the base 7.
When the globe 9 is turned on in an upward position (this position accounts for 90% or more of all lighting positions), the temperature inside the globe 9 is lowest at the top of the globe 9, which is the lowest point of gravity, due to thermal convection. Therefore, the coldest part of the tube wall, which influences the efficiency of the fluorescent lamp 19, is also formed in the tube wall near the top of the globe 9. Under such circumstances, when trying to maintain the temperature of the coldest part of the fluorescent lamp 19 lower and within an appropriate range, it is not necessarily necessary to cool the entire inside of the globe 9, which forms the coldest part. All you have to do is lower the ambient temperature of the area. That is, the efficiency of a fluorescent lamp generally depends on the mercury vapor pressure within the bulb, and this mercury vapor pressure is uniquely determined by the temperature of the coldest part of the bulb, that is, the lowest temperature. Therefore, no matter how much you heat or cool the parts other than the coldest part (to the extent that it does not become the coldest part), if the temperature of the coldest part does not change, the mercury vapor pressure inside the bulb will not change.
The efficiency of fluorescent lamps remains the same. Conversely, if the temperature of the coldest part is lowered, the mercury vapor pressure inside the bulb will decrease even if the temperature of other parts remains the same, improving efficiency. Therefore, in order to increase the efficiency of the fluorescent lamp 19 of this type of fluorescent lamp device, instead of cooling the entire inside of the globe 9, it is necessary to cool the lowest part of the gravity, which originally forms the coldest part, that is, the top of the globe. All you have to do is concentrate the cooling on the opposing parts. However, in the case of the fluorescent lamp device having the above configuration,
Since the wall thickness at the top of the globe 9, which is the lowest point of gravity, is made thinner, the temperature at the top of the globe 9 and the ambient temperature near the coldest part of the tube wall of the fluorescent lamp 19 can be effectively reduced. can. If the only purpose is to reduce the ambient temperature inside the globe 9 and the part that forms the coldest part, it may be possible to reduce the thickness of the entire globe, but if this is done, it will be difficult to handle the fluorescent lamp device. The glove 9 is easily damaged and is very dangerous for the operator. That is, when installing the present fluorescent lamp device into a socket, the operator grasps the side of the glove 9 and installs it into the socket. Therefore, pressure when gripping is applied to the side surface of the glove, and if the entire glove 9 is made thin, the side surface of the glove cannot withstand this pressure and is likely to be damaged. Therefore, the sides of the glove 9 cannot be made thinner, whereas the top of the glove 9 is not a gripping area, so no pressure is applied, and no problem occurs even if the top is made thinner. About the light lamp device with the above configuration 20W
Table 1 shows the effect of radiation from the fluorescent lamp 19 on the temperature distribution of the globe 9 when a fluorescent lamp 19 is used, the base is turned upward, and the inner thickness of the globe 9 is varied. Here, the temperature inside the glove 9 is measured.

[Table] As shown, it can be seen that when the wall thickness on the top side is thinner than the wall thickness on the side surrounding the opening, heat radiation is better performed and the temperature of the globe 9 is lowered. In addition, when a 20W fluorescent lamp is used for the fluorescent lamp device having the above configuration and is lit with the cap facing upward, the position 1 m below the top of the globe 9 when the wall thickness of the globe is changed. The results shown in Table 2 were obtained when the downward illuminance was measured.

[Effect of idea]

According to the present invention, the thickness of the top side of the globe is made thinner than that of other parts, which reduces the temperature rise of the globe, and when the lamp is lit with the cap facing upward, the temperature of the coldest part of the fluorescent lamp increases. It can effectively prevent a decrease in efficiency due to an increase in the temperature of the fluorescent lamp, and when the bulb is turned on with the base facing down, the heat inside the globe is effectively released, thereby indirectly reducing the efficiency of the fluorescent lamp. be able to. Furthermore, it is possible to improve the illuminance directly below the device.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIGS. 1 and 2 are sectional views taken from different directions, and FIG. 3 is a graph showing the relationship between the thickness of the glove and the downward illuminance. 5... Base (envelope), 9... Globe (envelope), 16... Ballast (lighting circuit parts), 19...
...Fluorescent lamp, 21a...First curve forming part, 21b
...Second music composition section, 29...Lighting tube (lighting circuit component).

Claims (1)

[Scope of utility model registration request] In the fluorescent lamp device, a curved fluorescent lamp and lighting circuit components are housed in an envelope constituted by a base and a light-transmitting resin glove, and a cap is attached to the base side. A fluorescent lamp device characterized in that the inner thickness on the top side is thinner than the inner thickness on the base side.