JP4923034B2 - Fluorescent lamp - Google Patents

Description

The present invention relates to a fluorescent lamp that prevents blackening of a tube end .

Conventionally, as a display shelf of a shop or the like, for example, as shown in FIG. 5, a bracket 51 is protruded in a horizontal direction from a support column 50, and a display shelf lighting device 52 is supported at the tip of the bracket 51, And many things of the structure which mounted the display shelves 53, 53 ... which consist of glass etc. on the upper surface of the bracket 51 and the lighting device 52 for display shelves are provided (for example, refer patent document 1 etc. below).
JP-A-9-306229 JP 9-63537 A

  In the conventional display shelf lighting device, the shade portion surrounding the fluorescent lamp is made of aluminum or light-impermeable resin so as to suppress glare, so that the fluorescent lamp cannot be directly seen from the front side. However, in order to emphasize the feeling of brightness or to give a feeling of relaxation with transmitted light, if a part of the shade, for example, the front wall part is made of light-transmitting resin, the fluorescent lamp will elapse in lighting time. As a result, a phenomenon occurs in which the end portion of the fluorescent lamp is blackened due to the sputtering phenomenon, so that the blackened portion is visually recognized from the outside, resulting in a problem that the appearance is deteriorated.

  In addition, a socket for inserting the base of the fluorescent lamp is disposed at the end of the lighting fixture, but when the lighting fixtures in which the front wall portion of the shade is a light-transmitting resin are arranged in tandem, The socket portion (both ends of the lighting fixture) becomes a dark portion, and there is a problem that the continuity of illumination is not ensured.

  Furthermore, since the fluorescent lamp increases the brightness from a position slightly away from the discharge electrode due to the characteristics of the discharge, the tube end is relatively darker than the general part, so the front wall portion of the shade is made of a light-transmitting resin. In this case, the intensity of illumination becomes remarkable, causing the appearance to deteriorate.

  Regarding the problem that the end portion of the fluorescent tube becomes dark, in Patent Document 2, an electron emission portion from which electrons are emitted and a support portion that supports the electron emission portion are arranged in the vicinity of the end portion of the fluorescent lamp. In the fluorescent lamp, there is described an invention in which the support portion is bent toward the end portion side of the fluorescent lamp so that the electron emission portion is brought closer to the end portion side and the luminance on the end portion side is ensured. Yes. Moreover, it is described in this invention that the blackening of the fluorescent tube end portion can be suppressed simultaneously by bending the support portion toward the end portion side.

  Certainly, in the case of the above-mentioned Patent Document 2, it is described that there is an effect of suppressing blackening at the end portion of the fluorescent tube, but blackening itself cannot be prevented, and the blackening is also performed as time passes. The point that it is gradually going on and the appearance becomes worse is still not solved.

Therefore, the main problem of the present invention is to conceal the blackened portion of the fluorescent lamp from the outside so that it cannot be visually confirmed to prevent deterioration of appearance due to blackening, and also when lighting fixtures are arranged in tandem. It is an object of the present invention to provide a fluorescent lamp capable of ensuring the continuity of the light source and at the same time eliminating the luminance deficiency at the end of the fluorescent tube.

In order to solve the above problems, as the present invention according to claim 1, in a fluorescent lamp provided with a discharge electrode inside a glass tube,
The fluorescent lamp is continuously provided from the end portion of the lighting glass tube portion through the connecting conduit portion, with the fluorescent glass being applied to the inner wall surface and serving as an illuminating body. And a pair of left and right discharge electrode installation conduits arranged in parallel along the longitudinal direction within the longitudinal dimension of the glass tube for illumination,
Without providing a discharge electrode on the glass tube for illumination, a discharge electrode is installed in both the discharge electrode installation pipelines, and a resin or a heat-resistant resin covers the connection pipeline and the discharge electrode installation pipeline, respectively. The connecting pipe part and the discharge electrode installing pipe part are concealed from the outside by installing a cover material according to the above, and a base having a pin electrically connected to the discharge electrode is provided in the cover material, The fluorescent lamp is characterized in that the base is installed on a surface opposite to the side on which the lighting glass tube portion is disposed .

In the present invention described in claim 1 above, the fluorescent lamp has a continuous auxiliary glass tube portion (connecting conduit portion and discharge electrode installing conduit portion) separately from the illuminating glass tube portion serving as the illuminating body. The discharge electrode is installed inside the discharge electrode installation pipe line . Therefore, the base and the socket can be arranged on the back side of the fluorescent lamp, and all of the lighting glass tube parts emit light. Therefore, even when the luminaires are arranged in tandem, the continuity of illumination is improved. It can be secured.

  Furthermore, in this fluorescent lamp, even if the blackening phenomenon near the discharge electrode due to sputtering occurs, this blackening phenomenon occurs in the auxiliary glass tube part, and this auxiliary glass tube part is concealed from the outside. It can be maintained until the life of the fluorescent lamp remains clean. In addition, since there is a certain distance from the discharge electrode to the glass tube for illumination, the fluorescent lamp uses the characteristic of increasing brightness from a position slightly away from the discharge electrode, and the glass tube for illumination is uniform. High brightness can be secured.

Moreover, in order not to show the auxiliary glass tube part which installs a discharge electrode, it is made to conceal with the shielding member (cover material) surrounding an auxiliary glass tube part. Therefore, even in the case of a luminaire in which the entire fluorescent lamp is exposed, the blackening phenomenon that occurs in the auxiliary glass tube is not visually recognized from the outside, and the life of the fluorescent lamp is maintained while the appearance of the fluorescent lamp is clean. It can be maintained until time.

According to a second aspect of the present invention, there is provided the fluorescent lamp according to the first aspect, wherein a distance from the discharge electrode to a boundary position between the lighting glass tube portion and the auxiliary glass tube portion is at least 10 mm. .

  Since the blackening phenomenon due to sputtering occurs mostly in the vicinity of the discharge electrode, the blackening phenomenon due to the sputtering of the lighting glass tube is effective by setting the distance from the discharge electrode to the lighting glass tube to 10 mm or more. Can be prevented.

  As described above in detail, according to the present invention, the blackened portion of the fluorescent lamp is concealed from the outside so that it cannot be visually confirmed, so that the appearance of the fluorescent lamp can be kept clean until the lifetime of the fluorescent lamp is reached. It becomes like this. At the same time, the distance from the discharge electrode to the glass tube for illumination can be secured, and the lack of brightness at the end of the fluorescent tube can be resolved at the same time.

  In addition, it is possible to ensure continuity of illumination even when arranged in tandem, and it is possible to simultaneously solve the shortage of luminance at the end of the fluorescent tube.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[First embodiment]
1A and 1B show a display shelf lighting device 1 according to the present invention, in which FIG. 1A is a front view, FIG. 1B is a bottom view (viewed along arrow BB), FIG. 2 is a perspective view, and FIG. It is.

  A display shelf lighting device 1 (hereinafter simply referred to as a lighting device) mainly includes a shade 10 having a substantially U-shaped cross section surrounding three surfaces of a front wall, a rear wall and an upper surface except for the lower surface side, and both ends of the shade 10. Side plates 13 and 14 that block the surface, a fluorescent lamp 15 disposed on the front wall side in the shade 10, a partition member 11 having a substantially L-shaped cross section disposed in the shade 10, and the interior of the partition member 11 It is comprised from the ballast 12 arrange | positioned. Reference numeral 16 denotes a power connector, and reference numeral 17 denotes a power supply connector for sending power to adjacent lighting fixtures when the display shelf lighting fixtures 1, 1,.

  As shown in FIG. 3, in the lighting device 1, the shade 10 includes a rear shade portion 10 </ b> A constituting a rear side portion of the rear wall and the upper surface portion, and a front side of the front wall and upper surface portion. The rear-side shade portion 10A is made of a light-impermeable member, such as an aluminum material, a light-impermeable resin, and the like, while the front-side shade portion 10B constituting the portion is formed. The seed portion 10B is made of a light transmissive resin such as an acrylic transparent resin or a polycarbonate transparent resin. Therefore, when the fluorescent lamp 15 is turned on, the surroundings are illuminated together with the bottom of the shelf by the direct light diffusing from the fluorescent lamp and the transmitted light transmitted from the front-side shade portion 10B.

  Similarly, the side plates 13 and 14 are also made of a light transmissive resin, for example, a material made of transparent acrylic resin, transparent polycarbonate resin, or the like. By illuminating the entire illumination glass tube portion 2 hidden and exposed to the side, transmitted light is diffused from the side plates 13 and 14 to the side surface side.

  On the other hand, as shown in FIG. 4, the fluorescent lamp 15 used in the lighting apparatus 1 includes an illumination glass tube portion 2 that is applied to the inner wall surface and serves as an illumination body, and the illumination glass tube portion 2. The auxiliary glass tube portion 3 is provided continuously from the end of the glass tube portion 2 and concealed from the outside by a shielding member (such as the cover material 5).

  The lighting glass tube portion 2 corresponds to a normal fluorescent glass tube in which a fluorescent material 9 is applied to the inner wall surface, but in the present invention, the lighting glass tube portion 2 that particularly functions as an illuminating body. A structure in which no discharge electrode is installed is adopted. The tube diameter A of the lighting glass tube portion 2 is set to about 12 to 25 mm as usual.

  The auxiliary glass tube portion 3 provided continuously to the lighting glass tube portion 2 is not a portion that functions as an illuminating body, and therefore, the fluorescent material does not need to be applied to the inner wall surface. The fluorescent material may be applied by, for example. In the example of the figure, the auxiliary glass tube portion 3 is composed of a connection tube portion 3A for connection with the illumination glass tube portion 2 and a discharge electrode installation tube portion 3B for installing the discharge electrode 4. . Here, the length B of the connecting conduit 3A is approximately 1 to 5 mm, the tube diameter of the discharge electrode installation conduit 3B is approximately 6 to 20 mm, and the length D is approximately 30 to 50 mm. . What is important in the configuration of the auxiliary glass tube part 3 is that the discharge electrode 4 installed in the discharge electrode installation pipe line part 3B to the boundary part between the glass tube part 2 for illumination and the glass tube part 3 for discharge part. The separation distance L should be at least 10 mm or more, preferably 15 mm or more, more preferably 20 mm or more, and still more preferably 30 mm or more. If the separation distance L is less than 10 mm, the blackening phenomenon due to sputtering reaches the illumination glass tube portion 2 and the blackened portion is visually recognized from the outside. As shown in FIG. 4, a cover material 5 made of stainless steel, resin, heat-resistant resin, or the like is provided around the auxiliary glass tube portion 3 and is visually concealed from the outside. When a stainless steel plate or the like is used as the cover member 5, it is desirable to provide holes at appropriate positions so as to dissipate heat from the fluorescent lamp. Further, when a resin or a heat-resistant resin is used as the cover material 5, the shade-shaped cover material 5 is manufactured in advance and the lighting glass tube portion 2 and the discharge portion glass tube portion 3 are joined. It is desirable to install it so as to cover the glass tube part 3 for the discharge part.

  In this case, the auxiliary glass tube portion 3 is reinforced by filling the gap M between the auxiliary glass tube portion 3 and the lighting glass tube portion 2 with a filler such as silicon. It is desirable to do. Alternatively, a filler such as silicon may be filled so as to fill the entire inner space of the cover material 5. In this case, the auxiliary glass tube portion 3 can be reliably reinforced, and heat is radiated from the outer surface by heat conduction through the filler.

  The discharge electrode 4 is composed of a lead wire 6 and a coil filament 7 coated with an alkaline earth metal oxide or the like. The auxiliary glass tube portion is supported by various known stems such as a flare stem or a button stem. Or a method of crushing and sealing the glass end portion while melting it in a state where an introduction line is drawn out from the glass end portion without using a stem. The base 8 having a terminal electrically connected to the lead-in wire 6 is specified in the JIS C7709 standard, for example, a bi-pin type (G type) having two pins 8a and 8a shown in the figure, a recessed double contact. An arbitrary base shape selected from a mold (R type) and an instant start mold (F type) having one pin can be used. As for the installation position, in the illustrated example, the discharge electrode 4 is inserted and installed in the direction along the longitudinal direction from the end face side of the discharge part auxiliary glass tube 3, but is orthogonal to the discharge part auxiliary glass tube 3. The discharge electrode 4 may be inserted and installed from the direction (side wall surface).

(Other examples)
(1) In the above-described embodiment, the auxiliary glass tube portion 3 is concealed from the outside by the cover material 5, but this cover material 5 is omitted and the fluorescent lamp is installed in the lighting fixture. For example, the auxiliary glass tube portion 3 is externally inserted by being inserted into the recess and concealed from the outside, or is concealed by a shielding member provided in the lighting fixture. It may be made invisible.
(2) In the above embodiment, the auxiliary glass tube portion 3 is concealed from the outside so as not to show the blackened portion. For example, a fluorescent material is applied to the inside of the auxiliary glass tube 3 and the auxiliary glass tube portion 3 is covered. By functioning as an illuminating body, it is possible to compensate for a lack of brightness at the end of a fluorescent lamp that tends to be dark.

1A and 1B show a display shelf lighting device 1 according to the present invention, in which FIG. 1A is a front view and FIG. 1B is a bottom view (a view taken along line B-B). FIG. FIG. FIG. 2 is a partially broken longitudinal sectional view of a fluorescent lamp 15. It is a side view which shows a display shelf structure. It is a figure which shows the blackening phenomenon of the fluorescent lamp.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Display shelf lighting fixture, 2 ... Lighting glass tube part, 3 ... Auxiliary glass tube part, 4 ... Discharge electrode, 5 ... Cover material, 6 ... Lead wire, 7 ... Filament, 8 ... Base, 10 ... Sade, 10A ... Rear side shade part, 10B ... Front side shade part, 12 ... Stabilizer, 13.14 ... Side plate

Claims (2)

In a fluorescent lamp with a discharge electrode inside the glass tube,
The fluorescent lamp is continuously provided from the end portion of the lighting glass tube portion through the connecting conduit portion, with the fluorescent glass being applied to the inner wall surface and serving as an illuminating body. And a pair of left and right discharge electrode installation conduits arranged in parallel along the longitudinal direction within the longitudinal dimension of the glass tube for illumination,
Without providing a discharge electrode on the glass tube for illumination, a discharge electrode is installed in both the discharge electrode installation pipelines, and a resin or a heat-resistant resin covers the connection pipeline and the discharge electrode installation pipeline, respectively. The connecting pipe part and the discharge electrode installing pipe part are concealed from the outside by installing a cover material according to the above, and a base having a pin electrically connected to the discharge electrode is provided in the cover material, The fluorescent lamp according to claim 1, wherein the base is disposed on a surface opposite to the side on which the lighting glass tube portion is disposed. The fluorescent lamp according to claim 1, wherein a distance from the discharge electrode to a boundary position between the glass tube for illumination and the auxiliary glass tube is at least 10 mm.

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