JP3168736U - Cold cathode fluorescent lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cold cathode fluorescent lamp having high illumination efficiency and high durability in a harsh environment. SOLUTION: A lamp body composed of a substrate 1 having a semi-cylindrical cross section, an inverter cover 30 having a semi-cylindrical cross section and a lamp cover 20 having a semi-cylindrical cross section covered by the substrate, and a lamp body housed therein. It is composed of cold cathode fluorescent tubes L1 and L2, an inverter device B, and a base formed at one end of the lamp body. The cold-cathode fluorescent tube has a U-shape, and the space inside the U-shape of the cold-cathode fluorescent tube is used as a space for accommodating a narrower U-shaped cold-cathode fluorescent tube, and its reflection is inside the substrate. A coating layer with acrylic urethane two-component paint is applied to improve performance, mechanical performance and physical performance, and the light diffusion performance, mechanical performance and physical performance of the front and back surfaces or the front surface or back surface of the lamp cover are applied. Apply a coating layer with acrylic resin paint to improve. [Selection diagram] Fig. 1

Description

  The present invention relates to a lamp with a built-in cold cathode fluorescent tube. More specifically, while maintaining the same size and mounting compatibility as a conventional compact fluorescent lamp, the lifetime is longer, the luminance is higher, and the illumination efficiency is higher. The present invention relates to a lamp having high durability in a harsh environment.

  Instead of a straight tube type fluorescent tube provided with a base at both ends of a linear fluorescent tube, a compact fluorescent lamp in which the fluorescent tube is bent in a U shape and the base is integrated on one side is widely used (Patent Document 1). The compact fluorescent lamp in which the fluorescent tube is bent into a U-shape has a shorter overall length than the straight tube fluorescent tube, so that a lighting fixture for accommodating the fluorescent tube can be downsized, while having a high luminance.

  The compact fluorescent lamp is characterized by the fact that lighting fixtures can be miniaturized, so air conditioner outlets on ceilings, broadcasting speakers, sprinklers, etc. that have been constrained by lighting fixtures and have limited the flexibility of installation location so far It was possible to increase the degree of freedom of installation of equipment with ceiling mounts, and demand in office facilities could be expected.

  In addition, because of its small size and high brightness, it could be expected to be used in lighting for commercial facilities and in elderly households with weak vision in dark places.

JP-A-8-17335 JP-A-1-161686

  However, the compact fluorescent lamp of the prior art has a large heat generation and its life is exhausted after about 8000 hours. In addition, since the illuminance decrease with the passage of time is large, there is a problem that the actual life is only about 6000 hours.

  As a result, in office facilities that have been introduced in large quantities, frequent replacement work of lamps is required, causing problems that hinder office operations, and there are many examples of installation in inconspicuous places such as high places, shadows of buildings and buildings, etc. There is a problem that frequent replacement work becomes a cost burden in the facility, and in old households where it is difficult to replace it, there is a problem that it is forced to have no lighting until the replacement because it is exchanged by others.

  The present invention was created to solve the above problems and to provide a cold cathode fluorescent lamp having high illumination efficiency and high durability in harsh environments. That is, the cold cathode fluorescent lamp of the present invention is made of a synthetic resin base having a semi-cylindrical cross section, an inverter cover made of synthetic resin having a semi-cylindrical cross section covered with the base, and a synthetic resin having a semi-cylindrical cross section. The lamp body is composed of a lamp cover, a plurality of cold cathode fluorescent tubes and an inverter device housed in the lamp body, a base formed at one end of the lamp body, and a lamp pin protruding from the base. In the lamp for supplying power to the lighting circuit composed of the inverter device and the cold cathode fluorescent tube through the lamp pin to be conducted by inserting the base into the lamp socket, the cold cathode fluorescent tube is configured in a U shape, By using the space inside the U-shape of the cold cathode fluorescent tube as a space for accommodating a U-shaped cold cathode fluorescent tube narrower than that, a wide and narrow cold cathode fluorescent tube can be accommodated. In addition, a coating layer for improving the reflection performance, mechanical performance, and physical performance is applied to the inside of the substrate, and the light diffusion performance and mechanical performance are applied to the front, back, front or back of the lamp cover. It is characterized in that a coating layer is applied with a resin-based paint for improving performance and physical performance.

  Since the cold cathode fluorescent tube does not have a filament in the electrode, it has a feature that a tube with a very small diameter is possible. In addition, since it is strong against blinking lighting, it has a long life, and furthermore, since the structure and the structure of the lighting circuit are relatively simple, it has a feature that the cost can be reduced.

  The cold cathode fluorescent lamp of the present invention was created by paying attention to the above-mentioned characteristics, and the cold cathode fluorescent tube is configured in a U shape by taking advantage of the fact that a tube with a very small diameter is possible. By using the space inside the U-shape of the cold cathode fluorescent tube as a space for accommodating a U-shaped cold cathode fluorescent tube narrower than that, a plurality of cold cathode fluorescent tubes can be combined with a conventional compact fluorescent lamp. It can be mounted in the same size range. In addition, by making the size and shape of the base and the lamp pin compatible with the single-part compact fluorescent lamp, the cold cathode fluorescent lamp of this device having the same size as the existing lighting equipment for compact fluorescent lamps can be obtained. It is possible to install.

  As a result, when the cold cathode fluorescent lamp of the present invention is used instead of a compact fluorescent lamp, the lamp life will be drastically increased to about 30,000 to 50,000 hours while ensuring the same or higher luminance. The lamp replacement period is more than five times that of the conventional compact fluorescent lamp. Therefore, frequent replacement work of lamps is not necessary in office facilities, and it does not hinder office work. In commercial facilities that are often installed in inconspicuous places such as high places, shadows of buildings, etc., the cost burden In the elderly households that are difficult to replace by themselves and have to be exchanged by others, there is an effect that the frequency of no lighting until the replacement is reduced.

  On the other hand, in the cold cathode fluorescent lamp of the present invention, a coating layer for improving mechanical performance and physical performance is applied to the inside of the substrate, and mechanical performance and physical performance are applied to the front, back, front or back of the lamp cover. Since the coating layer of the resin-based paint for improving the mechanical performance is applied, the mechanical performance, that is, the rigidity of the substrate and the lamp cover is increased to increase the overall strength.

  In addition, in order to reflect the light from the cold cathode fluorescent tube to the lamp cover side, a reflecting plate that should be provided inside the substrate is not adopted, but instead, the coating layer applied on the inside has an effect of improving the reflection performance. It is supposed to be.

  On the other hand, the coating layer applied to the front and back surfaces, the front surface, or the back surface of the lamp cover has an effect of improving the light diffusion performance.

  Therefore, in this device, the coating layer made of the resin-based paint does not only act to increase the rigidity of each member, but also acts to enhance the optical performance of the lamp. That is, the illumination efficiency is achieved by causing a reflection action to reflect the light from the cold cathode fluorescent tube to the lamp cover side inside the substrate and improving the light diffusion performance on the front or back surface or front surface or back surface of the lamp cover. The improvement effect is caused. Furthermore, the coating layer also acts to improve physical performance such as oil resistance, chemical resistance, and weather resistance, and contributes to improvement of durability when the cold cathode fluorescent lamp is used in a harsh environment.

  As described above, in this device, a coating layer made of a resin-based paint is applied to increase the strength of a cold cathode fluorescent lamp composed only of a synthetic resin member, and to achieve a synergistic effect of increasing its optical performance and durability. It will be. On the other hand, by eliminating the need for a metal member such as a reflector, the weight can be reduced, the manufacturing process can be simplified, the manufacturing cost can be reduced, and disposal can be facilitated.

The disassembled perspective view of the cold cathode fluorescent lamp of this device. The disassembled perspective view of the cold cathode fluorescent lamp of this device. The perspective view of the cold cathode fluorescent lamp of this device. The top view of the cold cathode fluorescent lamp of this device. The perspective view of a part of base | substrate of the cold cathode fluorescent lamp of this device. 1 is a cross-sectional view of a part of a base of a cold cathode fluorescent lamp according to the present invention. Sectional drawing of the cold cathode fluorescent lamp of this device.

  Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is an exploded perspective view of a cold cathode fluorescent lamp of the present invention. In the figure, reference numeral 1 is a base made of synthetic resin (polycarbonate is adopted in this embodiment), and 20 is a lamp cover made of synthetic resin (polycarbonate is adopted in this embodiment) covered by this base. Similarly, 30 is an inverter cover made of synthetic resin (in this embodiment, polycarbonate is adopted). These members are formed in a semi-cylindrical cross section, thereby forming a cylindrical lamp body when covered. As a result, a space for accommodating the cold cathode fluorescent tubes is accommodated between the lamp side region 10 of the substrate 1 and the lamp cover 20, and an inverter device is accommodated between the inverter side region 15 of the substrate 1 and the inverter cover 30. Space is secured. Further, the outside of the accommodation space of the inverter device functions as a base S for insertion / locking into the lamp socket (see FIGS. 3 and 4). The size and shape of the base and the lamp pin are compatible with a single base type compact fluorescent lamp. Needless to say, the lamp cover 20 is transparent or translucent.

  Reference numerals L1 and L2 in the figure denote cold cathode fluorescent tubes accommodated in a space between the lamp-side region 10 and the lamp cover 20 of the base 1 described above. These cold cathode fluorescent tubes are bent in a U shape, and the space inside the U shape of the cold cathode fluorescent tube L1 is used as a space for accommodating the U-shaped cold cathode fluorescent tube L2 narrower than that. Thus, wide and narrow cold cathode fluorescent tubes L1 and L2 are accommodated concentrically. In this embodiment, the wide cold cathode fluorescent tube L1 has a tube diameter of 5 mm and power consumption of 9.1 W, and the narrow cold cathode fluorescent tube L2 has a tube diameter of 5 mm and power consumption of 8.4 W. Adopted, the total length of the lamp body is 412 mm. Although two cold cathode fluorescent tubes are accommodated here, it is needless to say that the number accommodated may be two or more.

  Reference symbol B in the figure denotes an inverter device accommodated in a space between the inverter side region 15 and the inverter cover 30 of the base 1. This inverter device B is electrically connected to a plurality of lamp pins 18 protruding from the bottom plate 16 of the base S and the cold cathode fluorescent tubes L1 and L2. As a result, by inserting the base S into the lamp socket, electric power is supplied to the lighting circuit composed of the inverter device B and the cold cathode fluorescent tubes L1 and L2 via the lamp pin 18.

  The cold cathode fluorescent tubes L1 and L2 are sandwiched between the base and the lamp cover via a linear body G made of an elastic material fitted into both the inside of the lamp side region 10 and the inside of the lamp cover 20 of the base 1. Thus, it is used as a fixing means to the lamp body. 5 to 7 are diagrams showing the details. Reference numeral 11 in the figure denotes a holding stand that is erected on the inside of the base body in order to hold the linear body G on the base body 1. The holding base 11 is provided with a groove 12 for inserting the linear body G in the longitudinal direction, and step portions 13 and 13 are provided in the middle, and the inserted linear body has two points between the step portions. It is supported (see FIG. 6 showing a cross section taken along line XX in FIG. 5). Since the groove 12 is narrower than the linear body G, the linear body is strongly held in the groove while being deformed by elasticity, and the linear body is prevented from falling off during assembly. Become. The holding bases 11 are arranged in pairs on the left and right sides of the lamp side region 10 in a state where the longitudinal direction is orthogonal to the full length direction of the base body 1 and holds four linear bodies G for convenience. In addition, a holding table 21 having the same structure as the holding table 11 is also provided in the lamp cover 20 so as to be vertically symmetrical with the holding table 11, and by holding the linear body G, the cold cathode fluorescent tubes L1 and L2 are It is sandwiched between the lamp cover 20 and the lamp side region 10 of the base body from above and below via the linear body (see FIG. 7). Here, the linear body G employs a silicone rubber string having a circular cross section, but it is needless to say that the linear body G is not limited to this.

  As described above, in the cold cathode fluorescent lamp of the present invention, the outside of the accommodation space of the inverter device functions as a base S for inserting and locking into the lamp socket. The bottom plate 16 constituting the bottom is integrally formed in a raised state, and the deformed pentagonal positioning projections 17 and 17 for locking the base to the socket are integrated with the side wall and the bottom plate orthogonal to the projection. Mold. Further, on both sides of the rear end of the inverter cover 30 to be covered, concave portions 31 and 31 for fitting the positioning projections 17 and 17 projecting from the side wall of the base body 1 toward the inverter cover side are provided. The degree of coupling of each member at the time of the lid is increased.

  The base body 1 and the lamp cover 20, and the base body 1 and the inverter cover 30 are coupled by being screwed in a covered state. In the figure, reference numerals 14 and 24 denote engagement step portions provided at the ends of the base 1 and the lamp cover 20 when the cover is covered. The inverter cover 20 is also applied. Further, when the cover is covered, the inner side of the front end of the inverter cover 30 covers the overlap margin 25 on the inner side of the rear end of the lamp cover 20, thereby increasing the degree of coupling of the members. In the figure, reference numeral 26 denotes a heat radiating hole opened at the rear of the lamp cover 20.

Each member of the cold cathode fluorescent lamp having the above configuration is coated with a coating layer as follows.
(1) A coating layer for improving the reflection performance, mechanical performance, and physical performance is applied to the inside of the substrate 1. Here, the coating layer is made of a high-brightness (white) acrylic resin paint and achieves a glossiness of 95% or more. Further, an undercoat layer may be applied with an acrylic resin paint, and a mirror coating layer such as aluminum may be applied thereon by a vacuum deposition method.
(2) The front and back surfaces, the front surface, or the back surface of the lamp cover 20 is provided with a coating layer for improving the light diffusion performance, mechanical performance, and physical performance. Here, the coating layer is made of acrylic urethane two-component paint. In this embodiment, the coating layer is applied to the front and back surfaces of the lamp cover.

B Inverter device S Base L1 Cold cathode fluorescent lamp L2 Cold cathode fluorescent lamp 1 Base 20 Lamp cover 30 Inverter cover

Claims (4)

  A base body made of a synthetic resin having a semi-cylindrical cross section, an inverter cover made of a synthetic resin having a semi-cylindrical cross section covered with the base body, and a synthetic resin lamp cover having a semi-cylindrical cross section; A plurality of cold-cathode fluorescent tubes and inverter devices housed in the lamp body, a base formed at one end of the lamp body, and a lamp pin protruding from the base, and the base is inserted into the lamp socket. In the lamp for supplying electric power to the lighting circuit comprising the inverter device and the cold cathode fluorescent tube through the lamp pin to be conducted by the cold cathode fluorescent tube, the cold cathode fluorescent tube is formed in a U shape, and the inside of the U shape of the cold cathode fluorescent tube is By utilizing the space as a space for accommodating a U-shaped cold cathode fluorescent tube having a narrower width, a means for accommodating a wide and narrow cold cathode fluorescent tube is provided. A coating layer is applied to improve the reflection performance, mechanical performance, and physical performance of the lamp, and the light diffusion performance, mechanical performance, and physical performance of the lamp cover are improved on the front, back, surface, or back surface of the lamp cover. A cold cathode fluorescent lamp characterized by having a coating layer made of a base paint.   2. The cold cathode fluorescent lamp according to claim 1, wherein the coating layer applied to the inside of the substrate is a coating layer having a glossiness of 95% or more with a high-brightness acrylic resin paint.   2. The cold cathode fluorescent lamp according to claim 1, wherein the coating layer applied to the inside of the substrate is an undercoat layer made of an acrylic resin paint and a metal mirror coating layer formed thereon by a vacuum deposition method.   The cold cathode fluorescent lamp according to claim 1 or 2, wherein the coating layer applied to the front and back surfaces, the front surface, or the back surface of the lamp cover is a coating layer of acrylic urethane two-component paint.

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