JP2001243875A - Base for exclusive circular fluorescent lamp for high frequency lighting, exclusive circular fluorescent lamp for high frequency lighting and illumination fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide use with for a for a use with a base for exclusive circular fluorescent lamp for high frequency lighting, exclusive circular fluorescent lamp for high frequency lighting, and an illumination fixture, achieving improved brightness and light emitting efficiency even if the base is bridged between the ends of a lamp body containing a smaller-diameter circular glass bulb. SOLUTION: This lamp comprises a lamp body 1 having first and second stem mounts, different in height, at both ends and a ring glass bulb having a furrowed portion 4 at the end, filled with a preset amount of mercury and inactive gas, and the base 100 mounted between the ends of the lamp body, the base having almost semi-cylindrical first and second base members 10A, 10B. An almost central portion of the first base member is provided with a plurality of base pins 13. A cooling hole 17 is formed in the end of the first/or second base member, corresponding to the first and/or second stem mount of the lamp body, whichever is higher.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base for a ring-shaped fluorescent lamp dedicated to high-frequency lighting, a ring-shaped fluorescent lamp dedicated to high-frequency lighting, and a luminaire, and more particularly to a ring-shaped glass bulb having an internal space filled with mercury and an inert gas. The present invention relates to an improvement of a ring-shaped fluorescent lamp dedicated to high-frequency lighting having a diameter of about 16 mm.

[0002]

2. Description of the Related Art In general, a ring-shaped fluorescent lamp is provided with electrodes at both ends of a straight glass bulb having a light emitting layer on the inner surface and having a tube diameter of about 29 mm to heat the glass bulb.
It is made into a ring shape after softening, and a predetermined amount of mercury and inert gas are sealed in the internal space of this ring-shaped glass bulb, and it is turned on by applying a predetermined voltage between the electrodes Operate.

For example, a 40 W type three-wavelength ring type fluorescent lamp can obtain a brightness (total luminous flux) of about 3070 (lm), and a 32 W type can obtain a brightness of about 2360 (lm). A luminous efficiency of about (lm / W) is obtained, and it is widely applied to household lighting equipment.

Recently, it has been required to further improve the brightness and luminous efficiency of these ring-shaped fluorescent lamps, and a ring-shaped fluorescent lamp dedicated to high-frequency lighting in which a tube diameter of a ring-shaped glass bulb is reduced to about 16 mm. It has been proposed and put into practical use.

[0005] This annular fluorescent lamp FHC dedicated to high frequency lighting
Is composed of a lamp body 1 and a base 10 as shown in FIG. 11, for example. The lamp main body 1 has a tube diameter of 16
mm, an annular glass bulb 2, a stem mount 3 including a stem 3 a, an electrode 3 b, and a lead wire 3 c sealed at respective ends of the annular glass bulb 2, and respective ends of the annular glass bulb 2. Constricted part 4 formed in
And a light-emitting layer 5 formed on the inner surface of the ring-shaped glass bulb 2. The height H (height from the bulb end face to the electrode 3b) of the stem mount 3 sealed at each end of the ring-shaped glass bulb 2 is a low value of, for example, about 20 mm so as to increase the effective light emission length. , And all stem mounts are set at the same height. On the other hand, the base 10 includes first and second base pieces 10A and 10B having a substantially semi-cylindrical shape, and a plurality (for example, four) base pins 13 are provided at a substantially central portion of the first base piece 10A.
It is arranged so as to protrude to the surface side. These first,
The second base pieces 10A and 10B are mounted so as to be bridged between the ends of the ring-shaped glass bulb, and are fixed by tapping screws (not shown) or the like. In addition, the lead wires 3 c derived from the respective stem mounts 3 are electrically connected to the respective base pins 13.

According to this ring-shaped fluorescent lamp dedicated to high-frequency lighting, the current density can be set high and the efficiency can be increased by reducing the diameter of the ring-shaped glass bulb. For example, a 34 W type (corresponding to the conventional FCL40 type) Then 3270
(Lm) brightness is 27W type (conventional FCL32
(Corresponding to the type), a brightness of 2510 (lm) is obtained, and the luminous efficiency is greatly improved to 92 to 96 (lm / W).

In general, it is known that the brightness at the time of lighting of a ring-shaped fluorescent lamp is influenced by the mercury vapor pressure in the glass bulb, and the mercury vapor pressure is regulated by the coldest temperature in the glass bulb, which is the lowest temperature. ing. In addition, it is also known that when the mercury vapor pressure is approximately 6 μmmHg, the light is lit most efficiently and brightly, and the lighting efficiency decreases even if the mercury vapor pressure becomes higher or lower than the optimum value. This type of ring-shaped fluorescent lamp is designed such that when turned on at a normal ambient temperature (for example, 25 ° C.), the mercury vapor pressure in the glass bulb is about 6 μmmHg.
This optimum mercury vapor pressure is obtained when the coldest point temperature in the glass bulb is approximately 40 ° C.

However, in the above-described ring-shaped fluorescent lamp FHC dedicated to high-frequency lighting, the temperature of the glass bulb increases due to the increase in current density due to the reduction in the diameter of the glass bulb. The temperature becomes higher than 40 ° C. at which the optimum mercury vapor pressure is obtained, and the brightness and the luminous efficiency are impaired accordingly.

For example, a 27 watt type ring-shaped fluorescent lamp exclusively for high-frequency lighting (FHC27: JE standard JE)
The relationship between the ambient temperature and the light output at the time of lighting (named by L211) is as shown by a solid line A in FIGS. From the characteristics shown in the figure, the ambient temperature at which the luminous efficiency is maximized is about 15 ° C., and at this time, the optimum coldest point is formed in the glass bulb. However, when the ambient temperature is higher than 15 ° C., the coldest point temperature of approximately 40 ° C. at which the optimum mercury vapor pressure is obtained in the glass bulb is not formed, and the light output decreases as the ambient temperature increases. Become. For example, when the ambient temperature is 50 ° C., the light output is reduced to about 78%.

In particular, when the ring-shaped fluorescent lamp FHC dedicated to high-frequency lighting is applied to a closed-type lighting fixture or the like which is hermetically sealed by a cover or the like, the temperature inside the fixture is, for example, 60%.
Since the temperature is higher than ° C, the coldest temperature of the ring-shaped fluorescent lamp dedicated to high frequency lighting is further increased, and the brightness and the lighting efficiency are further impaired.

[0011]

Therefore, conventionally, in order to solve such a problem, a mercury amalgam is disposed in a ring-shaped glass bulb, or a cold-cooling optimal for a part of the ring-shaped glass bulb. Form a protrusion to secure the point temperature, or increase the height of one stem mount (the height from the bulb end face to the electrode) of the stem mount sealed at the end of the ring-shaped glass bulb. Various solutions have been attempted.

A first method is to use indium (Cd) or cadmium (C) on a stem portion of a stem mount, which is sealed at the end of a ring-shaped glass bulb, away from the electrode.
d), thallium (Tl), antimony (Sb), gold (A
u), tin (Sn), zinc (Zn) and other amalgam-forming metals are fixed, and a mercury amalgam is formed by the amalgam-forming metal and mercury. In-Hg amalgam is recommended.

According to this method, since the mercury vapor pressure in the amalgam state is lower than the mercury vapor pressure in the pure mercury state, the temperature of the portion where the mercury amalgam, which is the coldest part in the ring-shaped glass bulb, is set is appropriately adjusted. An appropriate mercury vapor pressure can be maintained even when the temperature is higher than the minimum cold spot temperature. For this reason, it is possible to sufficiently improve the brightness and the luminous efficiency.

However, if strong vibration or impact is applied to the ring-shaped glass bulb during manufacturing, transportation, or the like, the installation position of the mercury amalgam may shift. Especially when moving to a part close to the electrode, the temperature of the mercury amalgam at the time of lighting becomes higher than when it is installed at the stem end, so the mercury vapor pressure also increases, and This causes a problem that the brightness and the luminous efficiency are lower than the design values.

In the early stage of lighting, the temperature of the mercury amalgam is low, so that the mercury vapor pressure in the annular glass bulb is low.
Sufficient brightness cannot be obtained. For example, when about 5 to 10 minutes have elapsed after lighting, the temperature of the ring-shaped glass bulb also rises due to discharge or the like, and the ring-shaped glass bulb reaches a saturated state. However,
The fact that sufficient brightness cannot be obtained in the initial stage of lighting causes a problem that the original lighting function cannot be satisfied.

In the second method, as shown in FIG. 12, for example, an optimum cold spot temperature is secured at a central portion of the annular glass bulb 2 (a portion farthest from the electrodes at both ends). The projection P is integrally formed. Specifically, before or after the bending of the glass bulb, the central portion of the annular glass bulb 2 is heated and softened, and in this state, the internal pressure of the glass bulb is made slightly higher than the atmospheric pressure to form the protruding portion P. Is done.

According to this method, the protruding portions P are sufficiently separated so that the thermal influence from the electrodes is reduced, and the current density in this portion may be lower than that in other portions. The coldest part is formed. Accordingly, the mercury vapor pressure in the annular glass bulb is controlled to a vapor pressure determined by the temperature of the protruding portion P, and the brightness and the luminous efficiency are improved.

However, since the protruding portion P is formed at the center of the ring-shaped glass bulb 2, this ring-shaped fluorescent lamp dedicated to high-frequency lighting is damaged not only during manufacturing but also during handling due to external impact. There is a problem that it is easy to be done.

A third method is, for example, as shown in FIG. 13, of the first and second stem mounts 3 and 3H sealed at the respective ends of the ring-shaped glass bulb 2. The mounting height Hh of 3H is higher than the mounting height H of the first stem mount 3.
For example, the mounting height H of the first stem mount 3 is 20
The height Hh of the second stem mount 3H is set to about 35 mm while the height is about 35 mm.
The second stem mount 3H is basically composed of the stem 3ah and the electrode 3 in the same manner as the first stem mount 3.
b and the lead wire 3c, except that a high stem 3ah is used for the stem.

According to this method, the end of the annular glass bulb 2 on the second stem mount 3H side is connected to the electrode 3b.
In addition, since the thermal influence from the positive column is reduced, the coldest portion is formed in the ring-shaped glass bulb. Therefore, the mercury vapor pressure in the ring-shaped glass bulb is controlled to a vapor pressure determined by the temperature of the same portion, and the brightness (light output) and the luminous efficiency are improved.

For example, the relationship between the ambient temperature and the light output when the ring-shaped fluorescent lamp dedicated to high frequency lighting of the FHC 27 is turned on is shown by a solid line B in FIG. It can be understood that has been improved. That is, as described above, by increasing the height of one stem mount, the ambient temperature at which the light output becomes maximum becomes higher than the characteristic of the solid line A, and is shifted to a higher temperature side, for example, around 32 ° C. Therefore, for example, when the present invention is applied to a closed-type lighting fixture, the brightness can be considerably improved as compared with the ring-shaped fluorescent lamp dedicated to high-frequency lighting having the characteristics of the solid line A.

However, in the ring-shaped fluorescent lamp FHC dedicated to high-frequency lighting, the base 10 composed of the substantially semi-cylindrical first and second base pieces 10A and 10B is mounted between the ends of the lamp body 1 so as to bridge. Therefore, the end of the second stem mount 3H to be the coldest part is also covered by the base 10. For this reason, the cooling effect originally obtained by the high mounting is impaired, and there is a problem that the brightness and the luminous efficiency decrease on the high temperature side of the ambient temperature.

Therefore, an object of the present invention is to improve the brightness and the luminous efficiency even if the base is arranged in a bridging manner between the ends of the lamp main body including the ring-shaped glass bulb having a reduced diameter. It is an object of the present invention to provide a base for a ring-shaped fluorescent lamp dedicated to high-frequency lighting, a ring-shaped fluorescent lamp dedicated to high-frequency lighting, and a lighting fixture.

[0024]

SUMMARY OF THE INVENTION Accordingly, in order to achieve the above-mentioned object, the present invention comprises a predetermined amount of mercury and an inert gas sealed in an internal space of a ring-shaped glass bulb having electrodes disposed at both ends. A base attached to both ends of a lamp main body so as to be bridged, wherein the base is a substantially semi-cylindrical first or first base.
The first base piece is provided with a plurality of base pins at a substantially central portion of the first base piece so as to protrude toward the front side, and the first base piece and / or the second base piece are provided. A cooling hole is formed in at least one end of the piece.

According to a second aspect of the present invention, a predetermined amount is provided in an internal space of a ring-shaped glass bulb having first and second stem mounts having different mounting heights at both ends and having a constricted portion at an end. A base attached to both ends of the lamp main body in which mercury and an inert gas are sealed,
The base is composed of first and second base pieces having a substantially semi-cylindrical shape, and a plurality of base pins are arranged at a substantially central portion of the first base piece so as to protrude toward the front side. 1
Wherein a cooling hole is formed at an end of the first and second stem mounts of the lamp main body corresponding to the higher mounting height of the base piece and / or the second base piece, According to a third aspect, the first base piece and / or the second base piece are provided.
A protrusion for preventing rotation corresponding to the constricted portion mainly formed by the lamp is formed on the side of the base piece on which the cooling hole is formed.

According to a fourth aspect of the present invention, a predetermined amount is provided in an inner space of a ring-shaped glass bulb having first and second stem mounts having different mounting heights at both ends and a constricted portion at an end. A lamp main body in which mercury and an inert gas are sealed, and bases mounted so as to bridge both ends of the lamp main body, wherein the bases are substantially semi-cylindrical first and second bases.
In the first base piece, a plurality of base pins are arranged at a substantially central portion of the first base piece so as to protrude toward the front side, and the first base piece and / or the second base piece are provided with a plurality of base pins. Of the first and second stem mounts mainly in the lamp,
A cooling hole is formed on an end side corresponding to the side where the mount height is high.

According to a fifth aspect of the present invention, the cooling hole in the base is formed at a portion corresponding to an annular glass bulb having a stem mount having a high mounting height. The cooling holes in the base,
The first and second base pieces are formed at portions corresponding to the ring-shaped glass bulb having a stem mount having a high mounting height and at positions substantially opposed to each other. The cooling hole is formed so as to be located substantially above and below the base when the is positioned horizontally. The eighth invention is characterized in that the first base piece and / or the second base piece A whirl-stop projection corresponding to the constricted portion of the lamp is formed on the inner surface of the end on the side where the cooling hole is formed. According to a ninth invention, the tube diameter of the ring-shaped glass bulb mainly of the lamp is 20 mm. In the following, it is characterized in that it is preferably set to about 16 mm.

Further, a tenth invention of the present invention comprises a fixture main body, a cover, and a high-frequency lighting-only ring-shaped fluorescent lamp arranged in an internal space formed by the fixture main body and the cover. The ring-shaped fluorescent lamp has first and second stem mounts having different mounting heights at both ends, and a predetermined amount of mercury and an inert gas filled in an inner space of a ring-shaped glass bulb having a constricted portion at an end. And a base attached to both ends of the lamp main body so as to be bridged. The base is composed of first and second base pieces having a substantially semi-cylindrical shape, and the first base piece has A plurality of base pins are arranged at a substantially central portion thereof so as to protrude toward the front side, and the first base piece and / or the second base piece of the first and second stem mounts in the lamp main body. Of which, the mount height An eleventh invention is characterized in that the annular fluorescent lamp dedicated to high-frequency lighting is arranged substantially horizontally in the internal space formed by the appliance body and the cover. In addition, cooling holes are formed at substantially upper and lower portions of the base in the ring-shaped fluorescent lamp dedicated to high frequency lighting.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of a ring-shaped fluorescent lamp dedicated to high-frequency lighting according to the present invention is shown in FIGS.
This will be described with reference to FIG. In addition, in FIG.
The same parts as those of the conventional example shown in FIG. 3 are denoted by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 1, FHC is a ring-shaped fluorescent lamp dedicated to high-frequency lighting, and includes a lamp main body 1 and a lamp main body 1.
And a base 100 mounted so as to be bridged between the ends of the base. The lamp body 1 is a ring-shaped glass bulb 2
A first stem mount 3 having a mount height H set to, for example, about 20 mm at one end thereof, and a second stem H3 having a mount height Hh set to, for example, about 35 mm at the other end thereof.
Are sealed, and each end of the ring-shaped glass bulb 2 is gripped by a chuck jaw or the like of a bending jig when the straight glass bulb is bent into a ring shape. A constriction 4 is formed. The first stem mount 3 of the lamp main body 1 mainly includes a stem 3a, an electrode 3b, and a lead wire 3c.
Is mainly composed of a stem 3ah, an electrode 3
b and a lead wire 3c, and the lead wire 3c is electrically connected to a plurality of base pins 13 of a base 100 described later. The light emitting layer 5 is formed on the inner surface of the ring-shaped glass bulb 2.

On the other hand, the above-described base 100 is composed of, for example, a first base piece 10A and a second base piece 10B having a semi-cylindrical shape, and is bridged between the ends of the lamp main body 1. Are located in In the base 100, the first base piece 10A is a base body 1 formed into, for example, a semi-cylindrical shape.
1A, a flat square base 12 formed on the surface side of a substantially central portion of the base body 11A, and a plurality of studs formed in holes formed in the base 12 so that the tip portions protrude toward the surface side. (For example, four) base pins 13, a through hole 14 for inserting a tapping screw (not shown) formed in a central portion of the base 12 surrounded by the plurality of base pins 13, and an inner side (second base) of the base body 11 </ b> A. A positioning recess 15 formed at substantially both side edges of a center portion of the side where the piece 10B is abutted, and one end (the second stem mount 3H being sealed) inside the base body 11A. (A portion corresponding to the constricted portion 4 on the side where the projection 16 is located) and a notch hole formed in a side edge portion of the base body 11A closer to the base (12) than the portion where the projection 16 is formed. Multiple cold And a hole 17.

The second base piece 10B has a base body 11B formed into, for example, a semi-cylindrical shape, and one end inside the base body 11B (on the sealed side of the second stem mount 3H). (A portion corresponding to the constricted portion 4) and a plurality of notches formed in a side edge portion of the base body 11B closer to the base (12) than the portion where the protrusion 16a is formed. A cooling hole 17a, a blind hole-shaped locking hole 18 formed in a center portion corresponding to the through hole 14 of the base body 11A inside the base body 11B,
The positioning dowels 19 are formed on the inner sides of the base body 11B and substantially on both side edges corresponding to the recesses 15 of the base body 11A. Each base body 11A, 11B is formed of a self-extinguishing flame-retardant material, for example, VO grade polybutyl terephthalate (PBT) resin.

The above-mentioned first and second base pieces 10A, 10B
Are mounted in a bridging manner between the ends of the lamp body 1 so that the base bodies 11A and 11B are substantially cylindrical.
At this time, as shown in FIG. 6, the cooling holes 17, 17a of the base bodies 11A, 11B have a distance d from the valve edge on the sealing side of the second stem mount of 0 mm.
It is formed to be larger. That is, when the base 100 is mounted between the ends of the lamp body 1, the cooling holes 17, 17a always face the ring-shaped glass bulb 2 on the sealing side of the second stem mount, and the cooling holes 17, 17a of the lamp body 1 It is formed so as not to oppose the space between the ends. The reason for this configuration is that even if a thin conductive member is inserted into the base through the cooling holes 17 and 17a, the conductive member does not contact the lead wire 3c existing in the space between the ends of the lamp body 1. Care is taken to enhance safety.

The above-mentioned base 100 is mounted between the ends of the lamp body 1 as follows. First, the first base piece 10A is placed between the ends of the lamp main body 1, and the rotation preventing projection 16 is provided with the second base piece 10A.
Of the stem mount 3H on the sealing side of the stem mount 3H, and the lead wire 3c derived from the first and second stem mounts 3 and 3H is inserted into the base pin 13, and From the tip of the base pin 13. Next, the second base piece 10B is attached to the first base piece 10A.
And the projection 16a for preventing rotation of the second stem mount 3
H is engaged with the constricted portion 4 on the sealing side and abuts such that the dowel 19 is inserted into the concave portion 15 for positioning. Next, a tapping screw (not shown) is inserted from the through hole 14 of the first base piece 10A to the locking hole 1 of the second base piece 10B.
8 to fix the first and second base pieces 10A and 10B. After that, the lead wire 3c protruding from the base pin 13
Is cut, and the lead wire 3c and the base pin 13 are electrically connected to complete the mounting of the base 100 on the lamp main body 1. When the mounting is completed, the cooling holes 17 and 17a of the base 100 are positioned so as to face the ring-shaped glass bulb 2 on the sealing side of the second stem mount 3H. , The cooling holes 17, 17a are located substantially vertically and function as ventilation holes.

According to this embodiment, since the cooling holes 17 and 17a are formed in the base 100, the lamp body 1 in which the second stem mount 3H having a high mounting height is sealed at one end. In this case, since the end of the ring-shaped glass bulb 2 is cooled by the ventilation effect of the cooling holes 17 and 17a, the coldest part close to the ambient temperature is easily formed in the same part. Therefore, the brightness and the luminous efficiency on the high temperature side of the ambient temperature can be effectively improved as compared with the case where the cooling holes 17 and 17a are not formed.

In particular, the cooling holes 17, 1
Reference numeral 7a is positioned so as to face the ring-shaped glass bulb 2 on the sealing side of the second stem mount 3H, and furthermore, when the lamp main body 1 is positioned horizontally, the respective cooling holes 17, 17a are substantially formed. Since the ventilation passage is formed from the lower cooling hole to the upper cooling hole, when the ring-shaped fluorescent lamp FHC dedicated for high frequency lighting is used in a horizontal state, the second stem mount 3H is sealed. The coldest part can be formed in the stop side part. Therefore,
As described above, the brightness and the luminous efficiency on the high temperature side of the ambient temperature can be effectively improved as compared with the case where the cooling holes 17 and 17a are not formed.

Further, protrusions 16 and 16a are formed on one end side of the base 100 inside the first and second base pieces 10A and 10B, respectively.
6a is a second stem mount 3H in the lamp main body 1.
The projections 16 and 16a and the cooling holes 17 and 1 are engaged with the constricted portion 4 of the ring-shaped glass bulb 2 on the sealing side.
7a is set such that the separation length d from the valve end face to the cooling hole 17, 17a is 0 mm or more when the projections 16, 16a are engaged with the constricted portion 4. Therefore, when the base 100 is mounted on the lamp main body 1, the cooling holes 17, 17a always face the ring-shaped glass bulb 2 on the sealing side of the second stem mount 3H, and the cooling effect as described above is obtained. can get.

In addition, as described above, when the projections 16 and 16a and the cooling holes 17 and 17a are in engagement with the constricted portion 4 of the projections 16 and 16a, the cooling holes 17 and 16
Since the separation length d up to 17a is set to be equal to or greater than 0 mm, even if the gap between the ends of the ring-shaped glass bulb varies due to the molding variation of the ring-shaped glass bulb 2, the base 100 of the base 100 is not affected. When mounted on the lamp body 1, the projections 16 and 16a must be
The cooling holes 17, 17 a are always maintained in a positional relationship facing the annular glass bulb 2 because the cooling holes 17, 17 a are engaged with the constricted portion 4 of the annular glass bulb 2 on the sealing side of H. Therefore, not only the cooling effect as described above can be stably obtained, but also when the elongated conductive member is inserted from the cooling holes 17, 17a,
The lead 3c is not interrupted by the opposing ring-shaped glass bulb 2 and comes into contact with the lead 3c, so that high security can be obtained. The lead 3c located between the ends of the ring-shaped glass bulb through the cooling holes 17, 17a, not shown. Since the exhaust pipe and the like are not visible, a good appearance is obtained.

Further, the first and second
In the assembled state, protrusions 16 and 16a are provided on one end side inside the base pieces 10A and 10B.
The base 1 is formed to be dispersed at an angle of about 0 ° and is engaged with the constriction 4 of the annular glass bulb 2.
When a rotational force is applied to the base 00, the rotation of the base 1
The curvatures of 00 and the lamp main body 1 do not match, and the respective projections 16 and 16a are prevented from rotating from the constricted portion 4 trying to ride on the bank adjacent to the constricted portion 4. Therefore, the base 100 is prevented from being excessively rotated with respect to the lamp main body 1, and cutting of the lead wire 3c can be prevented.

FIG. 7 shows a second embodiment of a base for a ring-shaped fluorescent lamp dedicated to high frequency lighting according to the present invention.
The basic configuration is the same as the embodiment shown in FIGS.
The difference is that the cooling holes 17 are provided at the center of the ends of the base bodies 11A and 11B in the first and second base pieces 10A and 10B.
A, 17Aa is formed in an elongated arc shape.
The cooling holes 17A and 17Aa are formed so as to be substantially opposed to each other.

If this base 100 is applied to a ring-shaped fluorescent lamp dedicated to high-frequency lighting, the same effect as in the first embodiment can be obtained. In particular, if the number of formed cooling holes 17A, 17Aa is increased, a more desirable cooling effect can be expected.

FIG. 8 shows a third embodiment of a base for a ring-shaped fluorescent lamp exclusively for high-frequency lighting according to the present invention.
The basic configuration is the same as the embodiment shown in FIGS.
The difference is that the cooling holes 1 are provided at the ends of the abutting portions of the base bodies 11A, 11B in the first and second base pieces 10A, 10B.
7B and 17Ba are formed in a notched square shape. The cooling holes 17B and 17Ba are formed so as to be substantially opposed to each other.

If this base 100 is applied to a ring-shaped fluorescent lamp dedicated to high-frequency lighting, the same effect as in the first embodiment can be obtained.

FIGS. 9 and 10 show a fourth embodiment in which the ring-shaped fluorescent lamp FHC dedicated to high-frequency lighting according to the present invention is applied to a lighting fixture. The lighting fixture 20 includes, for example, a fixture main body 20A fixed to a ceiling surface and a fixture main body 20A.
A high-frequency lighting-dedicated ring-shaped fluorescent lamp FHC shown in FIGS. 1 to 6 supported substantially horizontally, and a translucent cover 20B mounted on the instrument body 20A so as to cover the high-frequency lighting-only ring-shaped fluorescent lamp FHC. It is composed of
Note that the ring-shaped fluorescent lamp FHC dedicated to high-frequency lighting is supported substantially horizontally on the appliance main body 20A such that the cooling holes 17, 17a in the base 100 thereof are positioned substantially vertically.

According to this embodiment, the ring-shaped fluorescent lamp FHC dedicated to high-frequency lighting is provided with the cooling holes 17, 17 in the base 100.
Since the coldest part where the brightness and the luminous efficiency are maximized is shifted to the high temperature side of the ambient temperature due to the formation of a, even when applied to the lighting fixture 20 in a substantially sealed state, the brightness at the high temperature side of the ambient temperature is high. The luminous efficiency can be effectively improved.

In particular, an annular fluorescent lamp FH dedicated to high-frequency lighting
C is the base 100 in the state of being supported by the instrument body 20A.
Since the cooling holes 17 and 17a are located almost vertically,
At the time of convection of the air in the device, the cooling holes 17, 17a function as ventilation holes. Therefore, the cooling holes 17, 17
Cooling of the bulb portion corresponding to a can be effectively performed, and undesired deterioration of the brightness of the annular fluorescent lamp FHC dedicated to high frequency lighting is reduced.

The present invention is not limited only to the above-described embodiment. For example, a base for a high-frequency lighting dedicated annular fluorescent lamp having a cooling hole is applied to a high-frequency lighting dedicated annular fluorescent lamp having substantially the same mounting height. The cooling holes can be formed in only one of the first and second die pieces, and the form can be appropriately selected. The rotation preventing projections on the base are the first and second projections.
Can be formed only on one of the base pieces.
Also, in the ring-shaped fluorescent lamp dedicated to high frequency lighting, the mounting height of the first and second stem mounts is 20 mm and 35 m.
The combination is not limited to the combination of m, and an appropriate combination is possible.
If it is less than 16 mm, it is also possible to select a size other than 16 mm. Furthermore, the luminaire to which the ring-shaped fluorescent lamp dedicated to high-frequency lighting is applied may be a ceiling-mounted type, a hanging type, a wall-mounted type, or the like, and can be applied to anything other than a closed type.

[0048]

Next, an experimental example will be described. 16 pipe diameter
A high-frequency lighting-dedicated fluorescent lamp in which a base as shown in FIGS. 3 to 5 is attached to a lamp mainly provided with first and second stem mounts having mounting heights of 20 mm and 35 mm at each end of a ring-shaped glass bulb having a length of 20 mm. Was manufactured and the relationship between its ambient temperature and light output was measured.
The result shown by was obtained. The relationship between the ambient temperature and the light output of a ring-shaped fluorescent lamp exclusively for high-frequency lighting in which the base shown in FIG. The relationship between the ambient temperature and the light output of the annular fluorescent lamp dedicated to high-frequency lighting in which a conventional base having no cooling hole formed in the same lamp main body as described above was obtained as shown by the solid line B in FIG. .

As is apparent from the results, the dotted lines C and D
For example, when the ambient temperature is 60 ° C., the brightness of the present invention is 2.5 to 3 times larger than that of the conventional product shown by the solid line B.
% Improvement.

[0050]

As described above, according to the present invention, since the cooling holes are formed in the base, when the present invention is applied to a ring-shaped fluorescent lamp dedicated to high-frequency lighting, the surrounding area is smaller than that without the cooling holes. Brightness and luminous efficiency on the high temperature side can be improved. In particular, the second end having a high mount height at one end
When applied to a ring-shaped fluorescent lamp exclusively for high-frequency lighting with the stem mount sealed, the end of the ring-shaped glass bulb is cooled by the ventilation effect of the cooling holes, so the coldest part close to the ambient temperature is in that part. As a result, the brightness and the luminous efficiency on the high temperature side of the ambient temperature can be more effectively improved.

In particular, when the ring-shaped fluorescent lamp dedicated to high-frequency lighting is arranged horizontally, if the cooling holes in the base are formed so as to be located substantially vertically, a ventilation path is formed from the lower cooling hole to the upper cooling hole. Therefore, the coolest portion can be formed on the sealing side portion of the second stem mount having a high mount height. Therefore, the brightness and the luminous efficiency on the high temperature side of the ambient temperature can be effectively improved as compared with the case where the cooling holes are not formed as described above.

Further, at one end side inside the first and second base pieces of the base, protrusions for preventing rotation are formed, and these protrusions are used for the second main body having a high mount height in the lamp main body. The projection and the cooling hole are engaged with the constricted portion of the ring-shaped glass bulb on the sealing side of the stem mount, so that when the projection is engaged with the constricted portion, the separation length from the bulb end face to the cooling hole is increased. The relationship is set such that d is 0 mm or more. Therefore, when the base is mounted on the lamp main body, the cooling hole always faces the ring-shaped glass bulb on the sealing side of the second stem mount, and the above-described cooling effect is obtained.

In addition, as described above, the protrusion and the cooling hole are:
When the projection is engaged with the constriction, the distance d from the end face of the bulb to the cooling hole is set to be 0 mm or more. Even if the spacing between the parts varies, the projections are always engaged with the constriction of the ring-shaped glass bulb on the sealing side of the second stem mount when the base is mounted on the lamp main body. It is always kept in a positional relationship facing the ring-shaped glass bulb. Therefore, not only the cooling effect as described above can be stably obtained, but even if an elongated conductive member is inserted from the cooling hole, it is not interrupted by the opposed ring-shaped glass bulb and does not come into contact with the lead wire. In addition, a good appearance can be obtained because the lead wire and the like located between the ends of the ring-shaped glass bulb are not visible through the cooling holes.

[Brief description of the drawings]

FIG. 1 is a plan view showing a first embodiment of a ring-shaped fluorescent lamp dedicated to high-frequency lighting according to the present invention.

FIG. 2 is a sectional view of a main part of a main part of the ring-shaped fluorescent lamp dedicated to high frequency lighting shown in FIG.

3A and 3B are first base pieces of a base in the ring-shaped fluorescent lamp dedicated to high-frequency lighting shown in FIG. 1, wherein FIG. 3A is a plan view of the front side, and FIG. 3B is a plan view of FIG. The bottom view, and FIG.

4A and 4B are second base pieces of the base in the ring-shaped fluorescent lamp dedicated to high frequency lighting shown in FIG. 1, wherein FIG. 4A is a plan view of the front side, and FIG. The bottom view, and FIG.

FIG. 5 is a perspective view of the base shown in FIG. 1;

FIG. 6 is an enlarged plan view of a main part of FIG. 1;

FIG. 7 is a perspective view showing a second embodiment of the base for a ring-shaped fluorescent lamp dedicated to high-frequency lighting according to the present invention.

FIG. 8 is a perspective view showing a third embodiment of a base for a ring-shaped fluorescent lamp dedicated to high-frequency lighting according to the present invention.

FIG. 9 is a cross-sectional view showing a fourth embodiment in which a ring-shaped fluorescent lamp dedicated to high-frequency lighting according to the present invention is applied to a lighting fixture.

FIG. 10 is a bottom view of FIG. 9;

FIG. 11 is a plan view showing a partially broken state of a conventional high-frequency lighting-dedicated annular fluorescent lamp.

FIG. 12 is a plan view showing another conventional ring-shaped fluorescent lamp dedicated to high-frequency lighting.

FIG. 13 is a plan view of a different conventional ring-shaped fluorescent lamp dedicated to high-frequency lighting in a partially broken state.

14 is a diagram showing the relationship between the ambient temperature and the light output, wherein a solid line A is a characteristic diagram of FIG. 11, and a solid line B is FIG.
3, the dotted line C is the characteristic diagram of the one shown in FIG. 1, and the dotted line D is the characteristic diagram of the one shown in FIG.

FIG. 15 is a characteristic diagram of what is shown in FIG. 11, and FIG.
The same characteristic figure as A of FIG.

[Explanation of symbols]

FHC High-frequency lighting-dedicated ring-type fluorescent lamp 1 Lamp main body 2 Ring-shaped glass bulb 3, 3H First and second mount stems 3a, 3ah Stem 3b Electrode 3c Lead wire 4 Constriction 5 Light-emitting layer 100 Bases 10A, 10B First, second Base pieces 11A, 11B Base body 13 Base pins 14 Through holes 15 Depressions 16, 16a Projections 17, 17a, 17A, 17Aa, 17B, 17Ba
Cooling hole 18 Locking hole 19 Projecting dowel 20 Lighting device 20A Device body 20B Cover

Claims (11)

[Claims] 1. A base mounted on both ends of a lamp main body in which a predetermined amount of mercury and an inert gas are sealed in an inner space of an annular glass bulb having electrodes disposed at both ends, said base being bridged. The base is composed of first and second base pieces having a substantially semi-cylindrical shape. A plurality of base pins are arranged on the first base piece at a substantially central portion thereof so as to protrude toward the front side. Wherein a cooling hole is formed in at least one end of the base piece and / or the second base piece. 2. A first and a second mounting plate having different mounting heights at both ends.
A predetermined amount of mercury and an inert gas are sealed in the inner space of a ring-shaped glass bulb having a stem mount and a constricted portion at the end. The base is composed of first and second base pieces having a substantially semi-cylindrical shape, and a plurality of base pins are arranged on the first base piece at a substantially central portion thereof so as to protrude toward the front side. In addition, a cooling hole is formed at an end of the first base piece and / or the second base piece corresponding to the side having the higher mount height of the first and second stem mounts mainly in the lamp. A base for a ring-shaped fluorescent lamp exclusively for high-frequency lighting, characterized by: 3. A rotation preventing projection corresponding to a constricted portion mainly formed by a lamp is formed on a side of the first base piece and / or the second base piece where a cooling hole is formed. 2. A base for a ring-shaped fluorescent lamp dedicated to high-frequency lighting according to 2. 4. A first and a second having different mounting heights at both ends.
A lamp main body in which a predetermined amount of mercury and an inert gas are sealed in an inner space of a ring-shaped glass bulb having a stem mount and a constricted portion at an end portion, so as to bridge both ends of the lamp main body. And a base which is attached to the base. The base comprises first and second base pieces each having a substantially semi-cylindrical shape. And the first base piece and / or the second base piece are cooled on the end side of the first and second stem mounts of the lamp main body corresponding to the side with the higher mount height. A ring-shaped fluorescent lamp exclusively for high-frequency lighting, characterized by having holes. 5. The ring-shaped fluorescent lamp according to claim 4, wherein the cooling hole in the base is formed at a portion corresponding to a ring-shaped glass bulb having a stem mount having a high mounting height. 6. The cooling hole in the base is provided with first and second cooling holes.
5. The ring-shaped fluorescent lamp exclusively for high-frequency lighting according to claim 4, wherein said base piece is formed at a portion corresponding to a ring-shaped glass bulb having a stem mount having a high mounting height and at a position substantially opposed thereto. 7. The ring-shaped fluorescent lamp exclusively for high frequency lighting according to claim 4, wherein the cooling holes are formed at substantially upper and lower portions of the base when the lamp main body is positioned horizontally. 8. A rotation preventing projection corresponding to a constricted portion mainly formed by a lamp is formed on an inner surface of an end of the first base piece and / or the second base piece on a side where a cooling hole is formed. The ring-shaped fluorescent lamp exclusively for high-frequency lighting according to claim 4. 9. The ring-shaped fluorescent lamp exclusively for high frequency lighting according to claim 4, wherein the tube diameter of the ring-shaped glass bulb mainly comprising the lamp is set to 20 mm or less, preferably about 16 mm. 10. A high-frequency lighting-only ring-shaped fluorescent lamp disposed in an internal space formed by the device body, a cover, and the device body and the cover, wherein the high-frequency lighting-only ring-shaped fluorescent lamp has a mounting height at both ends. A lamp main body having a predetermined amount of mercury and an inert gas sealed in an inner space of a ring-shaped glass bulb having first and second stem mounts different from each other and having a constricted portion at an end, and both ends of the lamp main body A base attached to the portion so as to bridge the portion, the base comprising first and second base pieces having a substantially semi-cylindrical shape, and the first base piece having a plurality of base pins at a substantially central portion thereof. Are arranged so as to protrude toward the front side, and correspond to the side of the first base piece and / or the second base piece having the higher mount height of the first and second stem mounts in the lamp main body. Cool to the end side A lighting device having a hole. 11. The ring-shaped fluorescent lamp exclusively for high-frequency lighting is disposed substantially horizontally in an internal space formed by the appliance body and the cover, and cooling holes are formed in substantially upper and lower portions of a base of the ring-shaped fluorescent lamp exclusively for high-frequency lighting. The lighting fixture according to claim 10, wherein: