JP2005166642A - Scatter prevention type fluorescent lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a scatter prevention type fluorescent lamp easily manufactured which immediately causes a lighting failure at breakage thereof. <P>SOLUTION: In the lamp in which a tube 31 is coated around a lamp tube, the tube 31 is provided with holes 33 to flow the air into the lamp tube and cause the lighting failure of the lamp at the breakage thereof, wherein each hole 33 has a diameter of 0.1 mm to 5 mm. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an anti-scattering fluorescent lamp. In particular, the present invention relates to a fluorescent lamp that is immediately turned off when the fluorescent lamp is damaged.

  The anti-scattering fluorescent lamp is formed by coating the outer surface of a lamp tube with a resin tube for preventing anti-scattering, and can prevent scattering of a glass piece when a lamp tube made of glass or the like is broken. In a normal fluorescent lamp that is not provided with a resin tube for preventing scattering, as shown in FIG. 14, the atmosphere flows into the lamp tube 61 from the damaged portion 71 simultaneously with the breakage of the lamp tube 61, and the lamp is instantaneously Cannot be lit. The atmosphere flowing into the lamp tube 61 is an impure gas for the fluorescent lamp and hinders discharge. Even if the damaged portion 71 is a crack or a small crack, air flows from the damaged portion 71 and the lamp cannot be lit.

As shown in FIG. 15, in the case of a scattering prevention type fluorescent lamp in which a resin tube 31 is provided around the lamp tube 61, the atmosphere passes between the resin tube 31 and the lamp tube 61 as shown in FIG. Then, after the breakage, the lamp cannot be turned on instantly.
Japanese Utility Model Publication No. 3-106662

  In the case of the scattering prevention type fluorescent lamp, when the broken portion 71 is a small crack or crack and the resin tube 31 and the lamp tube 61 are in close contact with each other, the atmosphere is filled with the resin tube 31 and the lamp tube 61. It is difficult to pass between the lamps, and there is a possibility that the lamps cannot be turned on immediately after breakage. If lighting continues even after some air (impure gas) is introduced into the lamp tube 61 due to breakage, it may cause a failure of the lighting circuit. That is, if the lighting continues with the impure gas being introduced into the lamp, the lamp current is constant and the lamp voltage rises. As a result, the lamp power rises. Therefore, the inverter is overloaded and the lighting circuit is broken.

  As described above, the anti-scattering fluorescent lamp has a very small damage to the lamp, and the vacuum inside the lamp is maintained thanks to the presence of the anti-scattering resin tube. Regardless, there is a problem that lighting may continue.

An object of the present invention is to make an anti-scattering fluorescent lamp immediately turn off when it is damaged.
Another object of the present invention is to provide a scattering-proof fluorescent lamp that is easy to manufacture and a fluorescent lamp that is immediately turned off when it is damaged.

  An anti-scattering fluorescent lamp according to the present invention is an anti-scattering fluorescent lamp in which a tube is covered around a lamp tube. When the lamp tube is damaged, the air flows into the lamp tube and the lamp is turned off. It is characterized by providing a hole.

  The hole has a diameter of 0.1 mm to 5 mm.

  One or more holes are provided so that the distance on the tube surface from any position on the tube surface to the nearest hole is 150 mm or less.

  The hole is provided on the inner peripheral side of the ring when the lamp tube is annular.

The manufacturing method of the anti-scattering fluorescent lamp according to the present invention includes an insertion step of inserting the lamp tube into the tube,
A drilling step of drilling a tube either before or after the insertion step;
A heating / shrinking step for heat-shrinking the tube after the insertion step and the hole-piercing step is provided, and a hole is provided in the tube that causes the atmosphere to flow into the lamp tube when the lamp tube breaks and the lamp is not turned on. And

  According to the present invention, even if a small breakage occurs in the anti-scattering fluorescent lamp, the tube for anti-scattering has a hole so that it is not in a vacuum state and is immediately turned off to protect the lighting circuit. It becomes possible.

  In addition, according to the present invention, even when a fluorescent lamp is manufactured using a lubricant such as silicon oil 53, the air can flow from the hole without maintaining the airtightness by the lubricant, and the lamp is not used. Can be lit.

Embodiment 1 FIG.
FIG. 1 is a diagram showing a method of manufacturing the scattering-preventing straight tube fluorescent lamp 41 according to this embodiment.
As the resin tube 31, for example, a teletube (“Tele” is a registered trademark) manufactured by Teijin Chemicals Ltd. is used. The resin tube 31 contracts when heated, and the scattering prevention type fluorescent lamp can be manufactured by coating the resin tube 31 on the completed straight tube type fluorescent lamp 41.

  First, a hole 33 is formed in the resin tube 31. In this example, the hole 33 is composed of a plurality of through holes that are opened at a predetermined interval on a straight line. A straight tube fluorescent lamp 41 is inserted into the resin tube 31 with the holes 33 formed therein. Next, the resin tube 31 in which the straight fluorescent lamp 41 is inserted is heated to contract the resin tube 31.

  FIG. 2 is a cross-sectional perspective view of the straight tube fluorescent lamp 41 manufactured as described above.

  In the straight tube fluorescent lamp 41 as described above, as shown in FIG. 3, when a broken portion 71 occurs, the atmosphere enters between the resin tube 31 and the lamp tube 61 through the hole 33, and the resin tube 31. The air that has entered between the lamp tube 61 passes through the damaged portion 71 and flows into the lamp tube 61. Therefore, at the moment when the damaged portion 71 occurs, the straight tube fluorescent lamp 41 cannot be lit.

FIG. 4 is a view showing a desirable size of the hole 33.
The size (diameter) of the hole when the lamp is completed (after shrinkage of the resin tube 31) is preferably in the range of 0.1 mm to 5 mm. If the diameter is smaller than 0.1 mm, the hole size is too small and the inflow of air is insufficient, the resin tube 31 is sucked to the damaged portion 71, and a crater-like recess is generated, and the inflow of air Is likely to be difficult.
On the other hand, when the size of the hole is larger than 5 mm, it means that the missing portion of the resin tube 31 is large, and the scattering resistance covered with the resin tube 31 may be reduced. In particular, for straight tube fluorescent lamps, JIS provides standards for anti-scattering, and when the hole size is larger than 5 mm, the anti-scattering characteristics defined by JIS may not be satisfied. There is.
In addition, the size of the hole shown in FIG. 4 is a size after heat shrinkage. Therefore, the size of the hole actually provided before the heat shrinkage is larger than the size of the hole shown in FIG. For example, when the resin tube 31 has a contraction rate of 30%, a hole having a size 30% larger than the value shown in FIG.

Next, the positions of holes (the arrangement of holes and the number of holes) will be described with reference to FIG.
FIG. 5 is a view when the resin tube 31 is cut from the straight tube fluorescent lamp 41 in the tube axis direction of the lamp tube 61 and developed.
When the resin tube 31 is expanded and flattened, the distance from any position (any point) of the resin tube 31 to the nearest hole 33 is preferably 150 mm or less.

FIG. 6 is a diagram showing the relationship between the distance from the damaged portion 71 to the hole and the airtight retention probability.
When the distance from the damaged portion 71 to the hole 33 is greater than 150 mm, the airtight retention rate is greater than 0%. That is, if there is a point exceeding 150 mm and the point is destroyed, even if the hole 33 is open, the atmosphere from the hole 33 does not reach the damaged part 71, and the damaged part 71 is blocked by the resin tube 31. Airtightness may be maintained. As shown in FIG. 6, the range in which the air surely flows in due to the presence of the holes is a distance of 150 mm or less. As shown in FIG. 7, when circles with a radius R = 150 mm are drawn around all the holes 33, the entire region of the resin tube 31 may be accommodated in the circles. In other words, the arrangement of the holes and the number of holes may be determined so that the entire region of the resin tube 31 is within a circle having a radius of 150 mm drawn around the hole 33. As described above, the smaller the number of the holes 33 and the size of the holes 33, the smaller the size and number of the holes 33 should be as small as possible. desirable.

Embodiment 2. FIG.
FIG. 8 is a diagram showing a method of manufacturing the scattering prevention type annular fluorescent lamp 51.
First, silicon oil 53 is applied to the lamp tube 61 as a lubricant for insertion into the resin tube 31. As a method of applying the silicon oil 53, the surface of the lamp tube 61 may be wiped with a cloth containing the silicon oil 53, or the silicon oil 53 may be sprayed. Alternatively, the lamp tube 61 may be immersed in the silicon oil 53. Next, the lamp tube 61 is inserted into the resin tube 31. Since the silicon oil 53 is applied, the lamp tube 61 can be easily inserted into the resin tube 31. After the insertion is completed, a hole 33 is opened in the resin tube 31. This hole 33 is desirably provided on the inner peripheral side of the lamp tube 61. Next, the lamp tube 61 and the resin tube 31 are heated, and the resin tube 31 is contracted. Next, the base 63 is attached to the lamp tube 61.

FIG. 9 shows a case where the hole 33 is formed on the inner peripheral side of the lamp tube 61.
FIG. 10 shows a case where a bulge 37 is generated on the inner peripheral side of the lamp tube 61 when the hole 33 is not provided in the resin tube 31.
In the case of the annular fluorescent lamp 51, the degree of contraction of the resin tube 31 differs between the outer peripheral side and the inner peripheral side of the lamp tube 61 during heat contraction, and air does not escape on the inner peripheral side of the lamp tube 61, The bulge 37 may be formed. Therefore, in order not to form the bulge 37, the hole 33 is provided on the inner peripheral side of the lamp tube 61, and the air between the lamp tube 61 and the resin tube 31 is allowed to escape from the hole 33 during the heat shrinkage. The bulge 37 is not formed.

  In the case of the annular fluorescent lamp 51 shown in FIG. 8, since the silicon oil 53 is applied, it is more likely that the lighting will continue when the lamp is broken than in the case of the straight fluorescent lamp 41. It will be a thing. The reason why the silicone oil 53 is applied is to smoothly insert and move the resin tube 31 with respect to the annular lamp tube 61. In the case of the straight tube type fluorescent lamp 41, silicon oil 53 may be applied to the lamp tube 61 and inserted, but in the case of the straight tube type, the lamp tube 61 is simply inserted into the resin tube 31 linearly. Therefore, the silicon oil 53 is not applied. However, in the case of the annular fluorescent lamp 51, it is desirable to apply silicon oil 53 around the lamp tube 61 to facilitate insertion into the resin tube 31 in order to improve workability. However, since the silicone oil 53 is applied around the lamp tube 61, as shown in FIG. 11, when the damaged portion 71 is generated, there is a high possibility that the silicone oil 53 blocks the inflow of air. End up. As shown in FIG. 11, when silicon oil 53 is applied between the resin tube 31 and the lamp tube 61, when the damaged portion 71 occurs, the lamp tube 61 and the resin tube 31 around the damaged portion 71 are generated. There is a case in which the air in between is slightly inflow, and air from the outside cannot be inflow. That is, the resin tube 31 is in close contact with the lamp tube 61 as if the balloon is deflated, and the silicone oil 53 blocks the inflow of air from the outside. Then, only the air around the damaged portion 71 is sucked into the lamp, the sucked portion is dented, and the concave portion 35 is formed. This state is the same as if the mouth does not leave the cup when the cup is placed on the mouth and the air in the cup is sucked. That is, since the silicone oil blocks the passage of air around the recess 35 (crater), the airtightness is maintained.

  As described above, even when the silicon oil 53 is applied, by providing the hole 33, the atmosphere flows from the hole 33 between the resin tube 31 and the lamp tube 61, and the silicon oil 53 blocks the passage of the atmosphere. Even if it is going to be done, the air which entered between the resin tube 31 and the lamp tube 61 becomes easy to flow into the inside of the lamp tube 61 from the damaged part 71, and the lamp cannot be lit.

  This embodiment is characterized in that the manufacturing method is such that the silicone oil 53 is applied to the lamp tube 61 at the time of manufacturing the lamp so that the lamp tube 61 can be easily inserted into the resin tube 31. Moreover, although it becomes easy to manufacture by using the silicon oil 53, on the other hand, since the fault that the lamp tends to continue to be lit when the damaged portion 71 occurs, a resin tube is used to remove this fault. A feature is that a hole 33 is provided in 31.

  The hole 33 described above has a first function of allowing air to flow when the broken portion 71 occurs, and air remaining between the resin tube 31 and the lamp tube 61 when the resin tube 31 is heated and contracted to the outside. It also has a second role to escape. The desirable hole size shown in FIG. 4 is a desirable size for achieving the first role of air inflow. When the second role of air is allowed to escape to the outside, the value may be smaller than the desired hole size shown in FIG. That is, as long as there is a small hole through which the air between the resin tube 31 and the lamp tube 61 passes, there is no problem even if the size is 0.1 mm or less.

Embodiment 3 FIG.
FIG. 12 shows a case where the hole 33 is a perforation 34.
By making the holes 33 into two rows of perforations 34, when the straight tube fluorescent lamp 41 is discarded due to its life, the resin tube 31 can be easily separated from the straight tube fluorescent lamp 41 and discarded. Become. The perforation 34 may not be a straight line but may be a wavy line or a spiral.

FIG. 13 is a diagram illustrating another example of the hole 33.
As shown to (a), the hole 33 may be provided in the whole circumference | surroundings of the straight tube | pipe type fluorescent lamp 41 by the predetermined pattern. Moreover, as shown in (b), the hole 33 is not limited to a circle but may be an ellipse or a slit. Further, as shown in (c), various types of holes 33 are conceivable, such as a square, a triangle, a cross, a combination, or a combination of different diameters.

FIG. 4 is a diagram illustrating a method for manufacturing the scattering-preventing straight tube fluorescent lamp 41 according to the first embodiment. 2 is a cross-sectional perspective view of a straight tube fluorescent lamp 41. FIG. It is a figure which shows the operation | movement by the hole 33. FIG. It is a figure which shows the size of the preferable hole at the time of lamp completion. It is a figure explaining arrangement | positioning of the hole 33. FIG. It is a figure which shows the relationship between the distance from the broken part 71 to the hole 33, and an airtight maintenance probability. It is a figure explaining arrangement | positioning of the resin tube 31 and the hole 33. FIG. FIG. 10 is a diagram illustrating a method for manufacturing the scattering prevention type annular fluorescent lamp 51 of the second embodiment. 2 is a cross-sectional perspective view of an annular fluorescent lamp 51. FIG. It is a figure which shows the malfunction which arises when there is no hole 33. FIG. It is a figure which shows the malfunction which arises when there is no hole 33. FIG. It is a figure which shows the hole 33 of Embodiment 3. FIG. It is a figure which shows the hole 33 of Embodiment 3. FIG. It is a figure explaining operation | movement when the broken part 71 arises in the conventional fluorescent lamp. It is a figure explaining operation | movement when the broken part 71 arises in the conventional scattering prevention type fluorescent lamp. It is a figure explaining operation | movement when the broken part 71 arises in the conventional scattering prevention type fluorescent lamp.

Explanation of symbols

  31 resin tube, 33 hole, 34 perforation, 35 recess, 37 bulge, 41 straight tube fluorescent lamp, 51 annular fluorescent lamp, 53 silicone oil, 61 lamp tube, 63 base, 71 broken part.

Claims (2)

  In the anti-scattering fluorescent lamp in which the tube is coated around the lamp tube, the tube is provided with a hole that causes the atmosphere to flow into the lamp tube when the lamp tube is broken, and the lamp is not lit. An anti-scattering fluorescent lamp having a diameter of ˜5 mm.   In an anti-scattering fluorescent lamp with a tube covered around the lamp tube, the tube is provided with a hole that causes air to flow into the lamp tube when the lamp tube is damaged, and the lamp does not light up. One or more scattering prevention type fluorescent lamps are provided so that the distance on the tube surface from any position to the nearest hole is 150 mm or less.

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