JP2005011679A - Selfballasted fluorescent lamp and lighting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a selfballasted fluorescent lamp and a lighting device provided with the same outside diameter size as a general incandescent bulb without shortening the length of a discharge path. <P>SOLUTION: The connecting tube 42 maintains the space to be 3 mm or less between bulbs positioned in the center of 4 or more pieces of U shaped bent bulbs 41 and sized as 50 to 70 mm high in maximum bulb height. Furthermore, the connecting tube 42 connects the bulbs positioned on both ends with the maximum bulb height of 40 to 60 mm, and the bulbs positioned in the center to be overlapping at least in the straight line parts, when seen from the extended direction of the U shaped surface. In addition, the connecting tube is formed approximately in parallel to the tangent coming into close proximity of a virtual circle on which ends of each bulbs are established on the approximately same circumference. By setting the total luminous flux to be 400 to 900 lm and more when lit at light emitting tube power of 7 to 11.5 W, in the lamp with the space between the same size bulbs positioned in the center and the arrangement of the bulb straight line part restricted and setting the height including the mouthpiece to be 109 mm or less in the lamp equivalent to the 60 W incandescent bulb and 98 mm and less in the lamp equivalent to 40 W, the best conditions are specified for each constitution for achieving equivalent size and total luminous flux of the incandescent lamp. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a light bulb-type fluorescent lamp and a lighting fixture having a compact and high luminous efficiency arc tube structure.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, for example, a bulb-type fluorescent lamp that has a cover having a base that can be attached to a socket of a general light bulb, houses a lighting device inside the cover, and stores the lighting tube in a globe by bending the arc tube is known. It has been.
[0003]
In recent years, due to the electronic circuit of lighting devices, processing technology, material improvements, etc., fluorescent lamps that are arc tubes have become smaller and more efficient, and the light output is equivalent while it is incandescent bulb 60W equivalent size, and A bulb-type fluorescent lamp having characteristics of high efficiency and long life is known (see, for example, Patent Document 1).
[0004]
Since such a bulb-type fluorescent lamp is lit with a high load on the tube wall, the temperature during normal lighting is high. Therefore, an arc tube filled with pure mercury cannot be lit at an optimum vapor pressure in a high-temperature atmosphere. . Therefore, in general, in a light bulb-type fluorescent lamp, an amalgam is enclosed in an arc tube so that the vapor pressure is lowered and the lamp is efficiently lit.
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 2000-21351
[Problems to be solved by the invention]
The bulb-type fluorescent lamp of Patent Document 1 has been miniaturized to an extent that approximates the external dimensions of a 60W type incandescent bulb, but is still larger than the external dimensions of a general incandescent bulb. However, there is a need for further miniaturization.
[0007]
The present invention has been made in view of the above points, and provides a small bulb-type fluorescent lamp and a lighting fixture so that the height and width of a general incandescent bulb are substantially the same without shortening the discharge path length. For the purpose.
[0008]
[Means for Solving the Problems]
The bulb-type fluorescent lamp according to claim 1 has a tube outer diameter of 7 to 9 mm and a valve interval of the same dimension with a maximum bulb height of 50 to 70 mm located in the center among four or more U-shaped bent bulbs is 3 mm or less. There is a maximum valve height of 40 to 60 mm located at both ends and at least a straight line portion as seen from the extending direction of the valve U-shaped surface located in the center, and a connecting pipe for connecting these valves is provided for each valve. One discharge path of 340 to 400 mm is formed by the connecting tube with the end portion being formed substantially parallel to a tangent line adjacent to a virtual circle standing on the same circumference, and the arc tube power is 7 to 11. An arc tube configured to have a total luminous flux of 400 to 900 lm when lit at 5 W; a cap on one side and the arc tube on the other side, and a cover so as to cover the arc tube A cover body that is attached to the body and has a height of 109 mm or less for a lamp equivalent to an incandescent bulb 60 W, and 98 mm or less for a lamp equivalent to an incandescent bulb 40 W; a lighting device housed in the cover body; an opening on one side And a globe having a shape having a maximum width of 60 mm or less, which is expanded toward the top of the substantially hemispherical shape on the other side.
[0009]
When the outer diameter of the tube is 7 mm or less, the starting voltage becomes high, which is not practical, and the narrow tube sealed at the end of the valve must be formed with it, which makes it difficult to exhaust and enclose amalgam. There is a risk. On the other hand, if it is 9 mm or more, it becomes difficult to reduce the size to an incandescent bulb, so the outer diameter of the tube must be 7 to 9 mm.
[0010]
The height of the valve located at the center is 50 to 70 mm, preferably 55 to 65 mm, optimally 55 mm, and the height of the valve located at both ends is 40 to 60 mm, preferably 45 to 55 mm, and optimally 50 mm. Can be formed to have an appearance dimension equivalent to an incandescent bulb. In addition, the virtual curve connecting the tops of the bulb bent portions of the arc tube covered with the approximately hemispherical globe and the approximately hemispherical inner wall curve of the globe have approximately the same curvature. It can be efficiently accommodated inside. The valve height means the length from the sealing end portion of the valve (not including the protruding length of the thin tube or the like) to the top of the bent portion.
[0011]
Furthermore, in order to ensure the discharge path length within a relatively long and limited space, the U-shaped surfaces of the respective bent bulbs are parallel and the bulb ends are substantially the same circle centered on the bulb longitudinal axis. It is necessary to arrange at the peripheral edge. By arranging the bulbs in this way, it becomes possible to ensure a sufficient discharge path length of 340 to 400 mm, and a desired light output can be obtained. On the other hand, it is possible to make the discharge path length 400 mm or more by using a bulb having a small tube outer diameter, but when the discharge path length exceeds 400 mm, the lamp starting voltage becomes excessively high, which is almost the same as an incandescent bulb. Since it is difficult to generate a sufficient starting voltage in a small lighting device accommodated within the same external dimensions, the discharge path length needs to be 340 to 400 mm.
[0012]
If the interval between the valves of the same size located in the center among the plurality of valves is 3 mm or more, a wasteful space is generated in the limited space, so it is difficult to arrange the valves with high efficiency and on a certain area. It is difficult to secure a sufficient discharge path due to a reduction in the bulb standing rate. However, in order to connect a plurality of bulbs to form one discharge path, it is necessary to connect them with a connecting tube. Therefore, when the bulbs are in contact, that is, when the interval is 0 mm, connection with the connecting tube is impossible. is there. Furthermore, if the valve is in contact, it may cause cracks due to external impact, so the valve interval should be 3 mm or less, preferably 1.5 to 2.5 mm, optimally 2 mm. Is preferred.
[0013]
A connecting tube for connecting a plurality of bulbs is formed substantially parallel to a tangent line close to a virtual circle formed by bulb ends arranged in parallel on a circumference centering on a central axis in the lamp longitudinal direction. That is, the connecting pipe is formed on an extension line from the center of the cross-sectional central axis of each valve linear part to be connected to the center of each valve. This is because the bulb end portions are arranged on the same circumference centered on the central axis in the lamp longitudinal direction, so that the bulbs of different dimensions inevitably overlap at least in the straight line portion when viewed from the extending direction of the U-shaped surface. Will be placed.
[0014]
The total luminous flux is a value emitted as a bulb-type fluorescent lamp, and is a value measured from the outer surface of the globe with the globe attached.
[0015]
The bulb-type fluorescent lamp according to claim 1 has a maximum bulb height of 50 mm to 70 mm at the center of the same bulb dimension among four or more U-shaped bent bulbs, and a maximum bulb height located at both ends. It is 40-60 mm, and it is arranged so that at least straight portions of valves having different dimensions as viewed from the extending direction of the valve U-shaped surface overlap each other, and the connecting pipes are erected on substantially the same circumference. When the lamp formed substantially parallel to the tangent line close to the virtual circle is lit with an arc tube power of 7 to 11.5 W, the total luminous flux is 400 to 900 lm or more, and the height including the base is equivalent to an incandescent lamp 60 W In the above lamps, 109 mm or less, and in a lamp corresponding to 40 W, 98 mm or less define the dimensions of the incandescent bulb and the optimum conditions for each component to correspond to the total luminous flux.
[0016]
According to a second aspect of the present invention, there is provided a lighting fixture comprising: the bulb-type fluorescent lamp according to the first aspect; and a fixture main body to which the bulb-type fluorescent lamp is mounted.
[0017]
According to invention of Claim 2, the lighting fixture which has an effect | action of Claim 1 can be provided.
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a bulb-type fluorescent lamp according to an embodiment of the present invention will be described with reference to the drawings.
[0018]
1 is a perspective view showing a bulb-type fluorescent lamp of the present embodiment, FIG. 2 is a perspective view showing a state in which the globe of FIG. 1 is removed, and FIG. 3 is a top view of the fluorescent lamp side of FIG.
[0019]
The bulb-type fluorescent lamp L shown in the figure has an external shape similar to the external shape defined in a general lighting bulb JIS C7501 equivalent to a rated power of 60 W, and a dimension H in the height direction from the base 10 to the top of the globe 20 is 100 to 100. 115 mm, which is approximately 109 mm in the present embodiment, and the maximum outer diameter of the cover body 30 is approximately 35 to 45 mm. The cover body 30 is formed in a substantially conical shape that expands toward the fluorescent lamp 40 with a heat-resistant synthetic resin such as polybutylene terephthalate (PBT).
[0020]
The fluorescent lamp 40 includes a bent bulb 41 made of glass. On the inner surface of each bulb 41, for example, a phosphor layer of a three-wavelength emission type is formed, and a rare gas such as argon is enclosed.
[0021]
The plurality of bent valves 41 form, for example, a U-shaped bent portion at an intermediate portion of a straight tube type valve having a tube outer diameter of 7 to 9 mm.
[0022]
The fluorescent lamp 40 includes four bent bulbs 41a, 41b, 41c, and 41d whose U-shaped surfaces face each other in parallel, and each bulb end is placed on a circumference centered on the central axis in the lamp longitudinal direction. The parts are connected by connecting pipes 42a, 42b, 42c in a state where they are arranged side by side. Each bending valve 41a, 41b, 41c, 41d is formed in a U shape by a substantially cylindrical valve having a cross section of about 8.5 mm and a pipe inner diameter of about 6.5 mm in this embodiment. Furthermore, the two valves 41b and 41c with a height of 55 mm located between the valves 41a and 41d with a height of 50 mm located at both ends and the connecting pipes 42a and 42c are 2 mm when viewed from the extending direction of the valve U-shaped surface. They are connected by a connecting pipe 42b so as to have a gap of a certain degree. The intermediate valves 41b and 41c and the valves 41a and 41d located at both ends where the electrodes are sealed are arranged so as to overlap with each other when viewed from the extending direction of the valve U-shaped surface. That is, the distance between the pair of linear bulbs and the curvature of the bent portion are set so that the pair of linear portions of each bulb 41a, 41b, 41c, 41d can be arranged on substantially the same circumference centering on the central axis in the longitudinal direction of the fluorescent lamp. Regulated and molded.
[0023]
A pair of electrodes is crushed and sealed at each end of the bent valves 41a and 41d at both ends. The pair of electrodes has a filament coil, the filament coil is supported by a pair of linear wells, led out to the outside through a jumet wire, and connected to a lighting device.
[0024]
The fluorescent lamp 40 is configured such that the height H1 of the bent valves 41b and 41c at the center is 55 to 65 mm, the height H2 of the bent valves 41a and 41d at both ends is 45 to 55 mm, and substantially H1> H2. ing.
[0025]
The four bent valves 41a, 41b, 41c, and 41d are sequentially connected by connecting pipes 42a, 42b, and 42c to form one continuous discharge path having a discharge path length of 340 to 400 mm. The connecting tubes 42a, 42b, 42c for connecting the respective bulbs 41a, 41b, 41c, 41d are formed by bulbs 41a, 41b, 41c, 41d arranged on the circumference centering on the central axis in the longitudinal direction of the fluorescent lamp 40. It is formed so as to be substantially parallel to the adjacent tangent of the formed imaginary circle. In addition, 1.8 mg of mercury is sealed in the bulb having such a configuration through a thin tube (not shown) described later.
[0026]
Of the four bulb end portions 41a, 41b, 41c, and 41d, at least one end portion where the electrode is not sealed is glass having a tube outer diameter of 3.0 to 5.0 mm and a tube inner diameter of 1.5 to 3.5 mm. A thin tube made of a valve is sealed. This thin tube is used for sealing mercury and also used as an exhaust pipe.
[0027]
The holder 31 that holds the fluorescent lamp 40 manufactured in this way is attached to the opening at the lower end of the cover body 30 and is formed into a disk shape with a heat-resistant synthetic resin material such as polybutylene terephthalate (PBT). Is formed. The holder 31 is formed with a plurality of mounting holes (not shown) through which the fluorescent lamp 40 is inserted, and is fixed with an adhesive such as a silicone resin (not shown) with the ends of the fluorescent lamp 40 inserted through the mounting holes. The Thereby, the fluorescent lamp 40 is supported by the holder 31. A lighting device is arranged on the side of the holder 31 where the fluorescent lamp 40 is not mounted.
[0028]
This lighting device includes a substantially disc-shaped circuit board disposed on a parallel plane orthogonal to the longitudinal direction of the fluorescent lamp 40. On one side of the base 10 side of the circuit board and both sides of the fluorescent lamp 40 side, A plurality of electrical components are mounted to constitute a high frequency lighting device that is an inverter circuit for lighting the fluorescent lamp 40 at high frequency.
[0029]
The bulb-type fluorescent lamp L configured as described above has an input power rating of 13 W, and a total luminous flux of 810 lm can be obtained by using a three-wavelength light emitting phosphor.
[0030]
According to the bulb-type fluorescent lamp L as described above, when the fluorescent lamp 40 is surrounded by the top spherical globe 20 having a shape similar to the appearance of a general incandescent bulb as in the present embodiment, this globe is used. Since the tops of the intermediate valves 41b and 41c are located below the top part where the height of the 20 is the highest, and both end valves 41a and 41d are arranged in a step difference from the intermediate valves 41b and 41c along the curve of the globe 20, By uniformly forming the gap between the fluorescent lamps 20 and the fluorescent lamp 40, the light distribution in the vertical downward direction becomes uniform. Further, since the bulb end is arranged at the circular peripheral edge centered in the longitudinal axis direction of the fluorescent lamp 40, the width in the bulb diagonal direction becomes uniform and the light distribution in the rotation direction becomes uniform. Further, since the valve ends connecting the U-shaped bent valves 41a, 41b, 41c, and 41d are close to each other, the connection processing can be easily performed, the connection strength is improved, and the size is further reduced. The volume accommodation rate on the holder 31 which arranges the valve in the open space is improved.
[0031]
In the present embodiment, the number of bulbs forming the light bulb-type fluorescent lamp L is four. However, the present invention is not limited to this, and the same effect can be obtained with three or less or four or more. Further, the fluorescent lamp is not limited to a bulb-type fluorescent lamp, and a compact fluorescent lamp or the like may be used.
[0032]
Next, the lighting fixture which is one Embodiment of this invention is demonstrated using FIG. FIG. 4 is a schematic cross-sectional view showing an embodiment of the embedded lighting fixture of the present invention. In the figure, L is a bulb-type fluorescent lamp, and the instrument body is composed of a base 51, a reflector 52, and the like.
[0033]
【The invention's effect】
According to the first aspect of the present invention, among four or more U-shaped bent valves, the valve interval of the same dimension of the maximum valve height 50 to 70 mm located in the center is 3 mm or less, and the maximum valve height 40 located at both ends. ˜60 mm, arranged so that at least the straight portions of the valves having different dimensions as viewed from the extending direction of the valve U-shaped surface overlap each other, and the connecting pipes are erected on substantially the same circumference. When the lamp formed substantially parallel to the tangent line close to the virtual circle is lit with an arc tube power of 7 to 11.5 W, the total luminous flux is 400 to 900 lm or more, and the height including the base is equivalent to an incandescent lamp 60 W. By setting the lamp to 109 mm or less and the lamp equivalent to 40 W to 98 mm or less, the dimensions of the incandescent lamp and the optimum conditions for each component to correspond to the total luminous flux are defined.
[0034]
According to invention of Claim 2, the lighting fixture which has an effect | action of Claim 1 can be provided.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a bulb-type fluorescent lamp of an embodiment.
FIG. 2 is a perspective view showing a state in which the globe of FIG. 1 is removed.
3 is a top view of the fluorescent lamp side of FIG.
FIG. 4 is a partial cross-sectional side view illustrating an embodiment of an embedded lighting fixture according to the present invention.
[Explanation of symbols]
10 ... base, 20 ... globe, 30 ... cover body, 31 ... holder,
40 ... Fluorescent lamp, 41 ... Bend bulb, 42 ... Connecting tube

Claims (2)

Among the four or more U-shaped bent valves having a tube outer diameter of 7 to 9 mm, the maximum valve height of 50 to 70 mm located in the center is 3 mm or less, and the maximum valve height 40 located at both ends is 40 mm or less. It is arranged so that at least the straight line parts overlap each other when viewed from the extending direction of the valve U-shaped surface located in the center of -60 mm, and the connecting pipes connecting these valves are erected on the substantially same circumference. Is formed substantially parallel to a tangent line adjacent to the virtual circle, and a single discharge path of 340 to 400 mm is formed by the connecting tube, so that the total luminous flux is 400 to 400 when the arc tube power is turned on at 7 to 11.5 W. An arc tube configured to be 900 lm;
The base is attached to one side and the arc tube is attached to the other side, and is attached to the cover body so as to cover the arc tube, and the height including the base is 109 mm or less with a lamp equivalent to an incandescent bulb 60W, and an incandescent bulb 40W. A cover body which is 98 mm or less for a considerable lamp;
A lighting device housed in the cover;
A glove having a shape that expands from the opening on one side toward the top of the substantially hemispherical shape on the other side and has a maximum width of 60 mm or less;
A bulb-type fluorescent lamp characterized by comprising: A bulb-type fluorescent lamp according to claim 1;
An instrument body equipped with this fluorescent lamp;
The lighting fixture characterized by comprising.

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