JP323I - Fluorescent lamp unit - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) This invention relates to a fluorescent lamp device that houses a bent fluorescent lamp and lighting circuit components for this bent fluorescent lamp in an envelope, and has a screw-type base attached to one end of the envelope to make it compatible with incandescent lamps. (Prior Art) Fluorescent lamps have superior light efficiency compared to general incandescent lamps,
Recently, fluorescent lamps have been equipped with E because they can be used at low voltages.
A screw-in base for a general incandescent lamp such as a 26-type lamp is attached, and lighting circuit parts such as a ballast are incorporated, and the general incandescent lamp is screwed into the socket.
Development is underway for fluorescent lamp devices that can be installed interchangeably with these general incandescent lamps. These fluorescent lamp devices have the advantages of being highly efficient and long-lasting, since they consume significantly less power than general incandescent lamps of the same brightness. However, in order for this type of fluorescent lamp device to be interchangeable with incandescent lamps, it is not enough to simply have a screw-in base, and it must be possible to use the reflector shade, globe, and other fixtures already in use for incandescent lamps. For this reason, the envelope must be quite compact, and the bent fluorescent lamp housed therein must be small and have a large light output. (Problems to be solved by the invention) However, bent fluorescent lamps that are small and have a large light output require high lamp power, which increases the amount of heat generated by the lamp. Moreover, the ballasts generally used as lighting circuit components also generate a large amount of heat. For this reason, these bent fluorescent lamps and ballasts must be
If the lamps are housed in a single sealed envelope, the temperature inside the envelope rises, the mercury vapor pressure of the fluorescent lamp becomes too high, and the light output drops. There are also problems such as the ballast being burned out by heat. On the other hand, if one tries to make the fluorescent lamp device compact, it is necessary to pay attention to the arrangement of the bent fluorescent lamp and the ballast, and the bent fluorescent lamp and the ballast must be placed close to each other. Therefore, it is possible to house the ballast between the bulbs of the bent fluorescent lamp, that is, in the space surrounded by the straight parts at both ends and the central bent part. However, in such a case, the bent fluorescent lamp and the ballast have mutual thermal influences. In particular, the ballast is impregnated with varnish to prevent insulation deterioration, and when this varnish is heated, its volatile components evaporate and adhere to the inner surface of the envelope, causing the envelope to discolor and impair light transmission. The present invention aims to provide a fluorescent lamp device which reduces the mutual thermal influence between the bent fluorescent lamp and the ballast, can be made compact by effectively utilizing the dead space, and prevents discoloration of the envelope due to evaporation of varnish. [Configuration of the invention] (Means for solving the problems) The present invention is characterized in that the inside of the envelope is divided by a partition into a first space having the base and accommodating the lighting circuit components, and a second space accommodating the bent fluorescent lamp, and the partition has a recess protruding into the second space, and the lighting circuit components are accommodated in the recess. (Function) According to the present invention, the inside of the envelope is divided by a partition into a first space and a second space, and the first space accommodates the lighting circuit components and the bent fluorescent lamp, so that the partition thermally isolates the lighting circuit components from the bent fluorescent lamp, reducing mutual thermal influence. Moreover, the partition plate is provided with a recess that protrudes toward the second space, and the lighting circuit components are housed in this recess, so that the installation location for the lighting circuit components can effectively utilize dead space, making the entire unit compact.
The bent fluorescent lamp and the lighting circuit components are isolated by the wall of the recess, so that even if the varnish evaporates, it is prevented from adhering to the inner surface of the envelope on the light-emitting side, and discoloration of the envelope is prevented. Furthermore, by accommodating a part of the lighting circuit components in the recess and the remaining part of the components in the first space, the degree of protrusion of the recess into the second space side is not too large, and the light absorption by this protruding part is small, and the light output is improved compared to a fluorescent lamp device in which the entire lighting circuit components are accommodated in the recess. Here, the part of the lighting circuit components means the part located on the globe side from the partition surface around the recess, and the remaining part of the lighting circuit components corresponds to the base side from the partition surface. Furthermore, it is extremely easy to connect the lead wires of the fluorescent lamp to the lighting circuit components and the base, and to connect the lighting circuit components to the base, and even if the globe is damaged, the lead wires (live-wire charging part) are not exposed to the risk of being touched by the user, ensuring safety. The present invention will be described below with reference to an embodiment shown in the drawings. In the drawings, reference numeral 1 denotes an envelope, which is constructed by butting a hollow base 2 with a transparent or semi-transparent globe 3. One end of the hollow base 2 is fitted with a screw-in base 4, such as an E26 type, which is connected to a power socket (not shown).
are fixed integrally to the hollow base 2. The other end of the hollow base 2 is closed by a partition plate 5, which divides the inside of the envelope 1 into a first space 6 on the hollow base 2 side and a second space 7 on the globe 3 side. The surface of the partition plate 5 facing the second space 7 is preferably formed as a reflective surface. In the first space 6 on the hollow base 2 side, a ballast 8, for example, is accommodated as a lighting circuit component. In this case, the partition plate 5 is integrally or integrally formed with a recess 9 protruding toward the second space 7 side in its center, and the ballast 8 is accommodated in this recess 9. The side wall of the hollow base 2 is provided with a number of heat dissipation holes 10... for dissipating heat from the first space 6 inside to the outside. In the second space 7 on the globe 3 side, a bent fluorescent lamp 11 is accommodated. Regarding the bent fluorescent lamp 11, reference numeral 12 denotes a glass bulb of the bent fluorescent lamp 11.
The bent valve 12 of this embodiment is formed by bending a straight valve 12 at its central portion 12a into a U-shape, and then bending both ends of the bent valve 12 into a U-shape in a direction perpendicular to the plane including the U-shape, so that the two U-shaped portions are arranged side by side so as to face each other, roughly resembling a horse's saddle. The two ends 12b, 12b of the bent valve 12 of this embodiment protrude forward beyond the tip P of the central bent portion 12a.
Discharge electrodes 13, 13 are attached to the bulb 12, respectively. A phosphor coating (not shown) is formed on the inner surface of the bulb 12, and a predetermined amount of mercury and inert gas is sealed inside the bulb 12. In the bent fluorescent lamp 11 thus constructed, both ends 12b, 12b of the bulb 12, which protrude beyond the tip P of the central bent portion 12a, penetrate the partition plate 5 and are accommodated and fixed in the first space 6 on the hollow base 2 side. That is, both ends 12b, 12b of the bent fluorescent lamp 11
b are the ends 12c and 12b of the bulb 12 from the electrodes 13 and 13, respectively.
The portion of the bent fluorescent lamp 11 that extends to the first space 6 and reaches the first space 6c, i.e., the portion that does not contribute to light emission, is guided into the first space 6. These end portions 12b, 12b are located beside the ballast 8 in the first space 6. The recess 9 protruding toward the second space 7 in the center of the partition board 5 is adapted to receive the end portions 12b, 12b of the bent fluorescent lamp 11.
The bent fluorescent lamp 11 is formed in a portion surrounded by the bent portion 12a and the central bent portion 12b, 12b, and is provided in a so-called dead space. The operation of the fluorescent lamp device thus constructed will now be described. When the bent fluorescent lamp 11 is in operation, the lamp 11 itself generates heat, and the ballast 8 also generates heat. However, the bent fluorescent lamp 11 is housed in the second space 7 on the globe 3 side separated by the partition plate 5, and the ballast 8 is housed in the hollow base 2 separated by the partition plate 5.
The partition plate 5 is accommodated in the first space 6 on the side of the partition plate 5.
provides thermal insulation between the fluorescent lamp 11 and the ballast 8, reducing mutual thermal influence. Furthermore, when the ballast 8 generates heat, the heat is released to the outside through the numerous heat release holes 10 formed in the side wall of the hollow base 2, preventing an abnormal temperature rise in the ballast 8. This prevents the ballast 8 from burning out due to heat. Furthermore, since a temperature rise in the ballast 8 is prevented, the evaporation of volatile substances such as the varnish impregnated and applied to the ballast 8 is suppressed. Even if the varnish evaporates, the ballast 8 will not evaporate.
Since the first space is partitioned by the partition plate 5 and the wall of the recess 9, the volatile substances of the varnish do not enter the second space, and therefore are prevented from adhering to the inner surface of the globe 3, so there is no risk of discoloring the globe 3. The volatile substances of the varnish are released to the outside through the heat dissipation holes 10. The temperature rise of the fluorescent lamp 11 occurs at both ends 12b, 12b.
The discharge electrodes 13, 13 are at the highest point, but these two ends 12
Since the electrodes 13, 13b and 12b are inserted into the first space 6 on the hollow base 2 side through the partition plate 5, the heat generated by these electrodes 13, 13 is dissipated through a number of heat dissipation holes 10...
The heat generated by the lamp 11 is released to the outside from the recess 9, suppressing the temperature rise of the fluorescent lamp 11. The partition plate 5 has a recess 9 protruding toward the second space 7 in the center thereof, and the ballast 8 is housed in the recess 9, so that the space of the hollow base 2 can be made small. Moreover, the recess 9 is formed in the second space 7 in a portion surrounded by both ends 12b, 12b of the bent fluorescent lamp 11 and the central bent portion 12a, so that this portion is a dead space, and therefore the dead space is effectively utilized. This makes the entire device small and compact. By housing a part of the lighting circuit components in the recess and housing the remaining part of the components in the first space, it is possible to prevent the recess from protruding too much toward the second space. If the entire lighting circuit components are housed in the recess, the recess will necessarily protrude too much toward the second space, which would cause excessive light absorption by the protruding part of the partition plate, but by housing a part of the lighting circuit components in the first space, this can be prevented. As a result, the light output can be improved compared to a fluorescent lamp device in which all of the lighting circuit components are housed in the recess. Since both ends of the fluorescent lamp face the first space and a part of the lighting circuit components are housed in the first space, the connection between the lead wires connected to the electrodes 13, 13 of the fluorescent lamp and the lighting circuit components and the base,
It is extremely easy to connect the lighting circuit components to the base. Furthermore, the partition has a portion that does not protrude into the second space, and the fluorescent lamp is saddle-shaped, which makes it easy for both ends of the fluorescent lamp to face the first space for the above-mentioned lead connection. Thus, according to this device, it is extremely easy to connect the leads between the fluorescent lamp, the lighting circuit components, and the base. Because both ends of the fluorescent lamp face the first space, the lead wires connected to the electrodes 13, 13 of the fluorescent lamp and extending from the ends are located within the first space. Therefore, even if the globe is damaged, the lead wires (live charging parts) will not be exposed and may be touched by the user,
Safety can be ensured. [Effects of the Invention] As described above, according to the present invention, the inside of the envelope is divided into a first space and a second space by a partition plate, the lighting circuit components are accommodated in the first space, and the bent fluorescent lamp is accommodated in the second space, so that the lighting circuit components and the bent fluorescent lamp are thermally insulated by the partition plate, and mutual thermal influence is reduced. Moreover, the partition plate is provided with a recess that protrudes toward the second space, and the lighting circuit components are accommodated in this recess, so that the dead space can be effectively used as a place to install the lighting circuit components, and the whole device becomes compact. Furthermore, since the bent fluorescent lamp and the lighting circuit components are isolated by the wall of the recess, even if the varnish evaporates from the lighting circuit components, it is prevented from adhering to the inner surface of the light-transmitting side of the envelope, and discoloration of the envelope is prevented, so there is no need to worry about a decrease in light transmittance. Furthermore, by accommodating a portion of the lighting circuit components in the recess and the remainder of the components in the first space, the light output is improved compared to a fluorescent lamp device in which the remainder of the lighting circuit components are accommodated in a recess. Furthermore, it is extremely easy to connect the fluorescent lamp lead wires to the lighting circuit components and base, and to connect the lighting circuit components to the base, and even if the globe is damaged, the lead wires (live charging part) are not exposed to the risk of being touched by the user, ensuring safety.

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show one embodiment of the present invention, in which Fig. 1 is a perspective view of the entire fluorescent lamp device, Fig. 2 is a side view, and Fig. 3 is a front view. 1 ... envelope, 2 ... base, 3 ... globe, 4 ...
Base, 5: partition plate, 6: first space, 7: second space, 8: ballast, 9: recess, 10: heat dissipation hole, 11
...Bent fluorescent lamp, 12...bulb, 13...electrode.

Claims (1)

[Correction specification] [Utility model registration claim] [Claim 1] A fluorescent lamp device in which a saddle-shaped bent fluorescent lamp and lighting circuit components for the bent fluorescent lamp are housed in an envelope having a base at one end, a first space defined by closing one end of a hollow base having the base at one end and housing lighting circuit components at the other end of the envelope and a second space defined by closing one end of a sealed globe housing the saddle-shaped bent portion of the bent fluorescent lamp with the partition plate, the partition plate having a recess protruding into the second space, both ends of the fluorescent lamp facing the first space from the second space side through a portion avoiding the recess of the partition plate, the saddle-shaped central bent portion of the fluorescent lamp facing the portion avoiding the recess of the partition plate in the second space, a portion of the lighting circuit components being housed in the recess and the remainder of the components being housed in the first space. 3. The fluorescent lamp device according to claim 1 or 2, wherein said lighting circuit component is a ballast.