JPH10106489A - Annular fluorescent lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the size of an annular fluorescent lamp and increase the output thereof via the application of a quadruple annular shape and provide a more advantageous quadruple annular shape. SOLUTION: An annular fluorescent lamp has a light emitting tube 200 with the first electrode part 110 as well as the second electrode part sealed and fitted to both ends thereof and includes the first large annular part 210 and the first small annular part 220, as well as the first small annular part 220 and the second large and small annular parts, concentrically laid along the same plane. The first electrode part is positioned at one end of the first large annular part 210, and the other end 219 adjacent to the first electrode part is closed and formed as a closed end. The end of the second large annular part adjacent to the second electrode part is similarly closed and formed as a closed end. In addition, both ends 221 and 229 of the first small annular part adjacent to each other, and both ends of the second small annular part 220 adjacent to each other are closed and formed as closed ends. Also, the diameter of each large and small annular part is identical. In this case, arrangement is made so as to keep such a state as superposed in plan view, regarding each large and small annular part, and each electrode part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small, high-power annular fluorescent lamp.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open Publication No. Hei 2-61956 discloses a small, high-output annular fluorescent lamp. It comprises an arc tube having a first electrode sealed at one end and a second electrode sealed at the other end. The arc tube includes a large annular portion and a small annular portion that are formed concentrically along the same plane. The first electrode portion is disposed at one end of the large annular portion, and the other end of the large annular portion adjacent to the first electrode portion is closed. A second electrode portion is disposed at one end of the small annular portion, and the other end of the small large annular portion adjacent to the second electrode portion is closed. The closed end of the large annular portion and the closed end of the small annular portion adjacent thereto are communicated via the auxiliary communication portion. The discharge path formed by the arc tube is a series of paths in the order of the first electrode portion, the large annular portion, the auxiliary communication portion, the small annular portion, and the second electrode portion. Takes the form of a long discharge path, resulting in a small, high-power annular fluorescent lamp. For this reason, a compact annular fluorescent lamp fixture incorporating the same is realized.

[0003]

The above-mentioned conventional annular fluorescent lamp has a double annular shape, and has a smaller and higher output than a general single annular type. However, the discharge path length does not become twice or more, and further miniaturization and high output cannot be expected. It is an object of the present invention to further reduce the size and output of the annular fluorescent lamp in the form of a quadruple ring. It is another object of the present invention to realize more advantageous quadruple cyclization.

[0004]

The present invention comprises an arc tube having a first electrode portion sealed at one end and a second electrode portion sealed at the other end. The arc tube includes a first large annular portion and a first small annular portion formed concentrically so as to be on the same plane. The arc tube further includes a second large annular portion and a second small annular portion formed concentrically along the same plane. The first electrode portion is disposed at one end of the first large annular portion. The other end of the first large annular portion adjacent to (adjacent to the first electrode portion) is closed. The second electrode portion is disposed at one end of the second large annular portion. The other end of the second large annular portion adjacent to the second electrode portion is closed. Both ends of the first small annular portion adjacent to each other are closed. Both ends of the second small annular portion adjacent to each other are closed. The ring diameters of the first and second large annular portions are the same, and the ring diameters of the first and second small annular portions are the same. In addition, the plane figures of the first and second large annular parts are overlapped, and the plane figures of the first and second small annular parts are overlapped, and the first and second electrode parts are overlapped. Place each part. The closed end portion of the first large annular portion and one of the closed end portions of the first small annular portion adjacent thereto are communicated via the first auxiliary communication portion. The closed end of the second large annular portion and one of the closed ends of the second small annular portion adjacent thereto are communicated via the second auxiliary communication portion. The other closed end of the first small annular portion and the other closed end of the second small annular portion adjacent thereto are communicated via the third auxiliary communication portion. As described above, the first electrode portion, the first large annular portion, the first auxiliary communication portion, the first small annular portion, the third auxiliary communication portion, the second small annular portion, the second auxiliary communication portion, and the second large communication portion. A series of long discharge paths in the order of the annular portion and the second electrode portion are established. In the present invention, the first and second electrode portions are arranged at the respective ends of the first large annular portion and the second large annular portion as described above. However, this point may be modified in the practice of the present invention, and it may be arranged at each end of the first small annular portion and the second small annular portion. In this case, the first electrode portion-the first small annular portion-the first auxiliary communication portion-the first large annular portion-the third auxiliary communication portion-
A long and large discharge path is formed in the order of the second large annular portion, the second auxiliary communication portion, the second small annular portion, and the second electrode portion.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. The annular fluorescent lamp of FIGS. 1 to 3 includes an arc tube 200 having a first electrode portion 110 sealed at one end and a second electrode portion 120 sealed at the other end. The features of the present invention depend on the form of the arc tube 200. The arc tube 200 has a first large annular portion 210 formed concentrically along the same plane.
And a first small annular portion 220. Further, it includes a second large annular portion 230 and a second small annular portion 240 formed concentrically so as to follow the same plane. The first electrode portion 51 is arranged at one end of the first large annular portion 210. The other end 219 of the first large annular portion 210 adjacent to the first electrode portion 51 is closed, and the closed end 2 is closed.
19 is assumed. The second electrode portion 1 is attached to one end of the second large annular portion 230.
20 is arranged. The other end 239 of the second large annular portion 230 adjacent to the second electrode portion 120 is closed, and the closed end 23 is closed.
9 is assumed. Both ends 2 of the first small annular portion 220 adjacent to each other
21.229 are sealed to form sealed ends 221 and 229. Both ends 241 of the second small annular portion 240 adjacent to each other
249 are sealed to form sealed ends 241 and 249. First electrode portion 51 and closed end portion 219 at both ends of first large annular portion 210
Are adjacent to each other because the first large annular portion 210 is annular. The same applies to the other adjacent areas.

The first and second large annular portions 210 and 230 have the same ring diameter (ring size). The ring diameters (same as above) of the first and second small annular portions 220 and 240 are the same. Then, the plane figures of the first and second large annular parts 210 and 230 overlap, and the first and second small annular parts 220 and 240
Of the first and second electrode portions 110.
The above components are arranged such that 120 plane figures overlap. Each of the overlaps means that they overlap when viewed along the center axis of the ring. The closed end 219 of the first large annular portion 210 and one of the closed ends 229 of the first small annular portion 220 adjacent thereto are communicated via the first auxiliary communication portion 251. The closed end 239 of the second large annular portion 230 and one of the closed ends 249 of the second small annular portion 240 adjacent thereto are communicated via the second auxiliary communication portion 252. The other closed end 221 of the first small annular portion 220 and the other closed end 241 of the second small annular portion 240 adjacent thereto are communicated via the third auxiliary communication portion 253. The arc tube 200 forms a series of long discharge paths interposed between the first electrode section 110 and the second electrode section 120. That is, the first electrode portion 110-the first large annular portion 210-
First auxiliary communication part 251-first small annular part 220-third auxiliary communication part 253-second small annular part 240-second auxiliary communication part 2
It is a series of discharge paths in the order of 52-second large annular part 230-second electrode part 120. The discharge between the first electrode unit 110 and the second electrode unit 120 is performed through this long discharge path. Although the size of the entire outer shape can be represented by the ring diameter of each of the large annular portions 210 and 230, it is a long and large discharge path for the size, and it is a small and high output type. This is a quadruple annular type, which is a double-sized long discharge path as compared with the conventional double annular type, so that further miniaturization and higher output can be achieved.

First large annular portion 210 / first small annular portion 220
The second large annular portion 230 and the second small annular portion 240 have the same pipe diameter (tube thickness). There is a slight gap of about 2 to 15 mm between the first large annular portion 210 and the first small annular portion 220. There is a similar gap between the second large annular portion 230 and the second small annular portion 240. There is a similar gap between the first large annular portion 210 and the second large annular portion 230 and between the first small annular portion 220 and the second small annular portion 240. The first electrode unit 110 and the second electrode unit 120 each include a coil electrode 190 supported by a pair of anchors. The longitudinal direction of each coil electrode 190 is the ring center axis (center line of the ring)
Is parallel to This is to make it hard to be affected by the curvature of the first large annular portion 210 or the second large annular portion 230. Similarly, the first electrode portion 110 and the second electrode portion 120 including the coil electrode 190 are arranged at the tube ends of the first large annular portion 210 and the second large annular portion 230 having smaller curvature (larger ring diameter). This is the reason. Each coil electrode 190 is arranged in a well-balanced manner in the center of the tube so as not to approach the first electrode portion 110 and the second electrode portion 120 with the tube. Each coil electrode 190 is connected to an unillustrated lighting circuit (for example, a high-frequency lighting circuit) via an unillustrated base pin of the base unit 900. Base 900
Are the first electrode section 110, the second electrode section 120, and each closed end 2
19, 221, 229, 239, 241 and 249 are arranged to cover the vicinity. The base 900 is made of a synthetic resin, and reinforces the vicinity thereof, makes it look like a complete ring, and plays a role of wiring of each coil electrode 190. Each annular part 210 ・ 2
The base 900 at 20, 230 and 240 is reinforced by the base 900. There is no reinforcement on the side opposite to the base 900. Therefore, each of the annular portions 21
It is desirable to reinforce by interposing an unillustrated reinforcing adhesive material that appropriately connects 0, 220, 230, and 240. Arc tube 20
Material 0 is a glass tube. A phosphor (not shown) is applied on the inner surface in a film form. The phosphor is, for example, a rare-earth phosphor having high heat resistance. The fluorescent material includes a first large annular portion 210, a first small annular portion 220, a second large annular portion 230, and a second small annular portion 24.
0 is applied at the time of straight pipe before bending each part. This is because a straight pipe can be more uniformly coated than a curved pipe because the suspension of the phosphor is applied by flowing. Then, the first large annular portion 210, the first small annular portion 220, the second large annular portion 23
The 0. second small annular portion 240 is individually bent into a required shape. The tube is kept hot at the time of its composition. Phosphors withstand this high temperature.

The first auxiliary communication portion 251 is formed by locally heating the corresponding portions of the first large annular portion 210 and the first small annular portion 220, blowing them out, and directly fusing them together. You. One end of the first large annular portion 210 is the first electrode portion 110, the other end is the closed end portion 219, and the first electrode portion 110
Comes with an exhaust pipe not shown. The pressurization for blowing is performed through this exhaust pipe. Both ends of the first small annular portion 220 are closed ends 221 and 229. The closed end 221
One or both of the 229 and the exhaust pipe (not shown) have a structure with an exhaust pipe, and the exhaust pipe is used to pressurize for blowing. The procedure for forming the second auxiliary communication portion 252 between the second large annular portion 230 and the second small annular portion 240 is the same. After forming the first auxiliary communication part 251 and the second auxiliary communication part 252, the third auxiliary communication part 253 is formed. This is also a blow-off type fusion bonding structure, but the blow-off at that time is the first electrode portion 110.
Via 120 The arc tube 200 is filled with mercury and a rare gas. An example of the rare gas is an argon gas. This sealing is performed using the exhaust pipe of the first electrode unit 110 in a state where the other exhaust pipes except the exhaust pipe of the first electrode unit 110 are closed. The inside of the arc tube 200 is evacuated through this exhaust pipe, and thereafter mercury and a rare gas are sealed therein, and finally the exhaust pipe is closed. For the operation of exhausting / sealing, the first electrode part 110 with an exhaust pipe and the second electrode part 120 without an exhaust pipe may be used. It is desirable to do. Based on the posture of FIG. 3, the first auxiliary communication portion 251
-The second auxiliary communication part 252 is horizontal, and the third auxiliary communication part 253 is vertical. For convenience of explanation, the former is the horizontal auxiliary communication part 251 and 252, and the latter is the vertical auxiliary communication part 253.
Considering this, the structure of the present invention provides a pair of horizontal auxiliary communication portions 251.
-A "two horizontal one vertical" form including the 252 and a single vertical auxiliary communication part 253. The advantage of the “two horizontal one vertical” is that the “first large annular part 210 and the first small annular part 220 connected via the first horizontal auxiliary communication part 251” before being connected by the third auxiliary communication part 253 in the vertical direction. The configuration and the configuration of “the second large annular portion 230 and the second small annular portion 240 connected via the second lateral auxiliary communication portion 252” are equivalent. If both the first electrode unit 110 and the second electrode unit 120 are provided with an exhaust pipe, they match. For this reason, "the first large annular portion 210 / the first small annular portion 220 / the first auxiliary communication portion 25"
The equipment for producing the element of "1" and the equipment for producing the element of "the second large annular part 230, the second small annular part 240, the second auxiliary communication part 252" may be the same. Alternatively, it can be produced using a plurality of facilities of the same type that are similarly designed and manufactured. Therefore, it is more advantageous than a system using different types of facilities.

As described above, the present invention is "two horizontal one vertical". Although it is outside the scope of the present invention, it is also possible to adopt a “1 horizontal 2 vertical” quadruple annular structure. For convenience of explanation, the description will be made by diverting the illustrated component codes. In the case of “1 horizontal and 2 vertical”, the first large annular portion 210 and the second large annular portion 230 are connected via a vertical auxiliary communication portion, The small annular portion 220 and the second small annular portion 240 are connected via a vertical auxiliary communication portion. Thereafter, the two are connected by a horizontal auxiliary communication part. Comparing the two before connecting with the horizontal auxiliary communication part, the former has a “large ring / large ring” structure in which the first electrode part 110 is attached to the first large annular part 210, and the latter is the second small annular part 240. This is a “small ring / small ring” structure accompanied by the second electrode portion 120, and the structures do not match. For this reason, it is necessary to produce both of these in different facilities, which is inferior to "two horizontal one vertical" which can be produced in the same or the same kind of facility.

Another embodiment of the present invention will be described with reference to FIG. FIG. 4 is a modification of the portion of FIG. 3, and the other points are the same as those of FIGS. 1 to 3 will not be described. In the case of FIG.
0 is disposed on the first small annular portion 220. Second electrode section 120
Is disposed on the second small annular portion 240. First small annular part 220
The second small annular portion 240 has a structure of one end electrode portion and the other end portion of which is closed. The first large annular portion 210 and the second large annular portion 230 do not have an electrode portion, and have a structure with both ends closed. The horizontal first auxiliary communication part 251 connects between the first large annular part 210 and the first small annular part 220. The horizontal second auxiliary communication portion 252 connects between the second large annular portion 230 and the second small annular portion 240. The vertical third auxiliary communication portion 253 connects between the first large annular portion 210 and the second large annular portion 230, but “the first large annular portion 210 and the first small annular portion before being connected by the third auxiliary communication portion 253. The element of “220 / first auxiliary communication part 251” and the element of “second large annular part 230 / second small annular part 240 / second auxiliary communication part 252” are equivalent. The quadruple annular fluorescent lamp of FIG.
The configuration is “horizontal 1 vertical”.

[0011]

According to the present invention, a so-called "two horizontal one vertical" quadruple annular fluorescent lamp is provided. According to this, it is possible to easily and inexpensively provide a small-sized, high-output annular fluorescent lamp having a long discharge path.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view showing an annular fluorescent lamp according to the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is an enlarged sectional view taken along a line AA and a line BB of FIG. 1;

FIG. 4 is a sectional view similar to FIG. 3, showing another annular lamp according to the present invention.

[Explanation of symbols]

 110: first electrode section 120: second electrode section 190: coil electrode 200: arc tube 210: first large annular section 219: closed end section 220: first small annular section 221: closed end section 229: closed end section 230 : Second large annular portion 239: closed end portion 240: second small annular portion 241: closed end portion 249: closed end portion 251: first auxiliary communication portion 252: second auxiliary communication portion 253: third auxiliary communication portion 900 ： Base

Claims (2)

[Claims] 1. An arc tube having a first electrode portion sealed at one end and a second electrode portion sealed at the other end, wherein said arc tube is formed concentrically so as to follow the same plane. The arc tube includes a large annular portion and a first small annular portion, and the arc tube further includes a second large annular portion and a second small annular portion formed concentrically so as to be along the same plane. Disposing the first electrode portion at one end, closing the other end adjacent to the first electrode portion in the first large annular portion, disposing the second electrode portion at one end of the second large annular portion, The other end adjacent to the second electrode portion in the second large annular portion is closed, both ends adjacent to each other in the first small annular portion are closed, and both ends adjacent to each other in the second small annular portion are closed. The ring diameters of the first and second large annular portions are the same, and the ring diameters of the first and second small annular portions are the same. In addition, the plane figures of the first and second large annular parts overlap each other, and the plane figures of the first and second small annular parts overlap each other, and the first and second electrode parts overlap each other. Arrange the above parts so that the plane figures overlap, and connect the closed end of the first large annular part and one closed end of the first small annular part adjacent thereto via the first auxiliary communication part. The second closed end portion of the second large annular portion and one of the closed end portions of the second small annular portion adjacent thereto are communicated via a second auxiliary communication portion. An annular fluorescent lamp, wherein the other closed end and the other closed end of the second small annular portion adjacent thereto are communicated via a third auxiliary communication portion. 2. An arc tube having a first electrode portion sealed at one end and a second electrode portion sealed at the other end, wherein the arc tube is formed concentrically so as to follow the same plane. The arc tube further includes a second large annular portion and a second small annular portion formed concentrically so as to be along the same plane. Disposing the first electrode portion at one end, blocking the other end of the second small annular portion adjacent to the first electrode portion, disposing the second electrode portion at one end of the second small annular portion, The other end adjacent to the second electrode portion in the second small annular portion is closed, both ends adjacent to each other in the first small annular portion are closed, and both ends adjacent to each other in the second small annular portion are closed, The ring diameters of the first and second large annular portions are the same, and the ring diameters of the first and second small annular portions are the same. In addition, the plane figures of the first and second large annular parts overlap each other, and the plane figures of the first and second small annular parts overlap each other, and the first and second electrode parts overlap each other. Arrange the above parts so that the closed end of the first small annular portion and one of the closed end portions of the first large annular portion adjacent thereto through a first auxiliary communication portion, and A closed end in the second small annular portion and one closed end of the second large annular portion adjacent thereto are communicated via a second auxiliary communication portion, and the other closed end in the first large annular portion is connected. An annular fluorescent lamp, wherein the portion and the other closed end of the second large annular portion adjacent to the portion are communicated via a third auxiliary communication portion.