JP5717095B2 - Straight tube fluorescent lamp type LED lamp for signboard - Google Patents

Description

  The present invention relates to a straight tube fluorescent lamp type LED lamp using an LED (light emitting diode) as a light source, and more particularly, a straight tube for a signboard suitable for a display lamp of a signboard in which a light source and an irradiation surface (advertisement face plate) are close to each other. The present invention relates to a fluorescent lamp type LED lamp.

  Conventionally, various types of illuminating lamps and indicator lamps using LEDs as a light source with extremely low power consumption and a long lifetime have been known. Various types of straight tube fluorescent LED lamps that can be used in place of existing straight tube fluorescent lamps have also been proposed (see Patent Documents 1 to 4).

  The straight tube fluorescent lamp type LED lamps disclosed in Patent Documents 1 to 4 and the like are all for general illumination, and a support body extending in the longitudinal direction is provided in a cylindrical cover that transmits light. A number of LEDs are attached to the body arranged in the longitudinal direction. A large number of LEDs are arranged in a line in order to compensate for the shortage of light quantity of the single LED. However, in the LED lamps described in Patent Documents 1 and 2, the support has a mountain-shaped cross section. Thus, by arranging a large number of LEDs in two rows on two inclined support surfaces, the shortage of the amount of light is compensated, and the light area is widened so that a wide area can be illuminated.

  Such a conventional straight-tube fluorescent lamp type LED lamp can be put to practical use as a general illumination for irradiating downward from 2 m to 3 m from the ceiling. For example, it is installed in a rectangular signboard body frame. When used as a display lamp for a signboard that irradiates the advertising board on the surface (usually milky white made of acrylic resin), there are the following disadvantages.

  Since the support covers the lower half of the cylindrical cover, the irradiation range irradiated through the cylindrical cover is narrowed, and the distance between the light source and the advertising faceplate of the signboard approaches 10 cm to 20 cm. As a signboard lamp, it is difficult to irradiate the advertising faceplate over a wide range and evenly. Irradiation is downward in one direction and there is not much influence on use for general lighting with a distance, but it should be illuminated as widely and evenly as possible to the billboard advertising faceplate where the light source is approaching Because is required.

  In addition, the above conventional straight tube fluorescent lamp type LED lamp has a problem in terms of heat radiation generated as LED driving loss because the support is in close contact with or close to the inner wall surface of the cylindrical cover. .

  In view of the above circumstances, an object of the present invention is to provide a straight tube fluorescent LED lamp suitable as a light source for a signboard.

In order to solve the above-mentioned problems, a signboard fluorescent tube type LED lamp according to the present invention is provided with a support extending in the longitudinal direction in a cylindrical cover that transmits light, and a large number of LEDs are provided on the support. It is a straight tube fluorescent lamp type LED lamp that is arranged in the longitudinal direction, and the support body has a hollow shape and is provided on the inner bottom portion of the cylindrical cover and has a narrow support leg extending in the longitudinal direction. And two inclined support plates that are connected to the support leg and have a mountain-shaped cross section, and a plurality of LEDs are attached to each of the inclined support plates in a longitudinal direction. A space portion is formed between both side portions of the support body including two inclined support plates, both side surfaces of the support leg portion, and an inner wall surface of the cylindrical cover, and the width of the support leg portion is the cylinder. Japanese to be 10% to 20% relative to the Jo cover diameter To.

  The cylindrical cover is preferably made of a flame retardant polycarbonate, and the support is preferably made of an aluminum alloy mold material.

  Further, it is desirable that the two inclined support plates are formed in an acute angle mountain shape.

  The straight fluorescent lamp type LED lamp for a signboard according to the present invention is installed in a cylindrical cover, and the support for attaching a large number of LEDs is provided on the inner bottom of the cylindrical cover and extends in the longitudinal direction. It has a support leg and two inclined support plates that are connected to the support leg and have a cross-sectional chevron shape, and a large number of LEDs are arranged in the longitudinal direction on each of the inclined support plates. Therefore, the light emitted from the LED is irradiated in the upward and lateral directions of the cylindrical cover, and is diffusely reflected on the inner wall surface of the cylindrical cover, while the two inclined support plates are Since the void portion is formed between both side surfaces of the support body and both side surfaces of the narrow support leg portion and the inner wall surface of the cylindrical cover, the irregularly reflected light is reflected in the void portion. Through the inside lower side of the cylindrical cover It is irradiated over a wide range to the opposite sides of the support legs. In particular, if the two inclined support plates are formed to have an acute cross-sectional mountain shape, it is effective because the irradiation range of the LEDs arranged and attached to both inclined support plates is widened.

  Accordingly, an appropriate number of straight tube fluorescent LED lamps of the present invention having such a configuration are installed in the signboard frame, and each LED lamp is 10 cm from the acrylic resin advertising faceplate attached to the signboard frame. In a use state arranged close to ˜20 cm, since the irradiation range of the LED lamp is wide, the entire advertising faceplate can be illuminated uniformly and brightly.

  In addition, since a void portion exists between the support and the cylindrical cover, the entire heat radiation area is increased, and heat generated by the driving loss of the LED can be effectively released. In particular, when the support is formed into a hollow body using an aluminum alloy mold material, the heat dissipation efficiency can be greatly improved while reducing the weight.

It is a top view which shows one Example of the straight tube | pipe fluorescent lamp type LED lamp for signboards concerning this invention. It is a side view same as the above. FIG. 3 is an enlarged cross-sectional view taken along line 3-3 in FIG. 1. FIG. 4 is an enlarged cross-sectional view taken along line 4-4 of FIG. It is a partially notched side view which shows the state which mounted the straight tube | pipe fluorescent lamp type LED lamp for signboards to the attachment bracket same as the above. It is explanatory drawing which shows the single-sided display signboard which uses the straight tube | pipe fluorescent lamp type LED lamp for signboards same as the above.

  Hereinafter, the present invention will be described based on embodiments shown in the drawings.

  1 and 2 show one embodiment of a straight tube fluorescent lamp type LED lamp for signboard according to the present invention, and the LED lamp 1 extends in a longitudinal direction in a cylindrical cover 2 that transmits light. A structure in which a support body 3 is provided, a large number of LEDs 4 are arranged and attached to the support body 3 in the longitudinal direction, and the caps 5 and 5 are fitted to the opening portions on both ends of the cylindrical cover 2 is a conventional straight tube. This is the same as the fluorescent lamp type LED lamp, and the same is also true in that two terminals 6 and 6 are provided on each base 5.

  The cylindrical cover 2 is made of flame-retardant polycarbonate in the same manner as an existing straight tube fluorescent lamp, but as shown in FIG. 3, it faces the bottom portion (the main body chassis 21 of the mounting bracket 20 to be described later). Two locking ridges 7, 7 extending in the longitudinal direction are projected on the inner wall surface of the side surface portion, and a dovetail shape that engages and holds the support 3 between the both locking ridges 7, 7. The engaging groove 8 is formed.

  As shown in FIGS. 3 and 4, the support 3 has a narrow support leg 10 extending in the longitudinal direction along the bottom of the cylindrical cover 2, and is connected to the support leg 10 so as to extend upward. A hollow body formed of both side plates 11 and 11 and two inclined support plates 12 and 12 having a mountain-shaped cross-section connected to both side plates 11 and 11, and attached to the base 5 at both ends of the support leg 10. Screw holes 13 and 13 are provided for fixing. The support 3 having such a shape is integrally formed of an aluminum alloy mold material, and has a structure in which the weight is reduced as a hollow body and the heat dissipation effect is enhanced by increasing the surface area. Further, the support leg 10 has locking protrusions 14 and 14 projecting on both side edges of the lower end, and both the locking protrusions 14 and 14 are engaged with the engagement grooves 8 of the cylindrical cover 2, The support 3 is assembled to the cylindrical cover 2, and in the assembled state, both sides of the support 3, that is, both sides 11, 11, both sides of the inclined support plates 12, 12 and both sides of the support leg 10, A void portion 15 is formed between the inner wall surface of the cylindrical cover 2. The space 15 may be a wide space so that light radiated from the LED 4 to be described later is diffusely reflected on the inner wall surface of the cylindrical cover 2 so that the cylindrical cover 2 can be irradiated as widely as possible. desirable. For this reason, the support leg portion 10 has a narrow structure, but in the illustrated embodiment, the lateral width A of the support leg portion 10 is 10% to 20% with respect to the diameter of the cylindrical cover 2 in consideration of strength. The dimensions are set. In addition, the shape of the support body 3 is not limited to the shape of embodiment shown in figure, The cross-sectional angle | corner which the two inclination support plates 12 and 12 provided in a row by the narrow support leg part 11 spread to a horizontal direction. If so, an umbrella shape, a mushroom shape, and other various shapes can be used.

  On the other hand, two substrates 16 and 16 on which a large number of LEDs 4 are arranged are attached and fixed to the two inclined support plates 12 and 12 of the support 3. In order for the light emitted from each LED 4 to illuminate a wide range in the cylindrical cover 2, it is desirable that the angled sections of the two inclined support plates 12 and 12 are acute angles, and in the illustrated embodiment, the angle is about 60 degrees. Is set.

  As described above, when the support body 3 on which a large number of LEDs 4 are mounted is assembled to the cylindrical cover 2 by engaging the support legs 10 with the engaging grooves 8 of the cylindrical cover 2, both ends of the cylindrical cover 2 are opened. As shown in FIG. 4, the support body 3 and the base 5 are connected and fixed to each other via a spacer 18 with a set screw 17. Then, the terminals 6 and 6 of the base 5 are electrically connected to the respective LEDs 4 via both substrates 16 and 16, and the signboard straight tube fluorescent lamp type LED lamp 1 of the present invention is completed.

As shown in FIG. 5, a straight tube fluorescent lamp type LED lamp 1 for a signboard of the present invention having the above configuration has sockets 22 and 22 attached to both ends of a main body chassis 21 of a mounting bracket 20 (in FIG. A socket 22 is shown) and the terminals 6 and 6 of the metal caps 5 and 5 are fitted to each other, and the support leg 10 is attached to the mounting bracket 20 in a posture facing the main body chassis 21 (see FIG. 6). The power supply unit (stabilizer) 23 attached to the main body chassis 21 is electrically connected. Further, a connection terminal block 24 for electrically connecting the plurality of LED lamps 1 is attached to the main body chassis 21.

  The LED lamp 1 attached to the mounting bracket 20 is used by being installed in a signboard frame 30 as shown in FIG. The signboard frame 30 is formed by providing an advertisement face plate 32 made of acrylic resin on one side of a rectangular main body frame 31. The main body frame 31 is made of a metal plate, a plastic material, wood, or the like, and the main body chassis 21 of the mounting bracket 20 in which the LED lamp 1 is assembled to the bottom plate 33 facing the advertising face plate 32 is fixed. It is installed in the signboard frame 30. Thus, although the LED lamp 1 installed in the signboard frame 30 is located close to the advertising face plate 32 at a short distance of 10 cm to 20 cm, the advertising face plate 32 is usually made of acrylic resin and has a floating white color. Therefore, the lighting particles of the LED lamp 1 are hardly visible from the outside of the signboard frame 30. Further, the LED lamps 1 installed in the signboard frame 30 are provided with an appropriate number (two in the illustrated embodiment) at predetermined intervals according to the size of the advertisement face plate 32, so that the entire advertisement face plate 32 is uniform. In addition, it is desirable to irradiate evenly.

  As described above, the LED lamp 1 installed in the signboard frame 30 is irradiated with the light emitted from each LED lamp 4 in the upward direction and the both side directions of the cylindrical cover 2 and is cylindrical. Between the both side surfaces of the support 3 including the two inclined support plates 12 and 12 and the both side surfaces of the narrow support legs 10 and the inner wall surface of the cylindrical cover 2. Since the void portion 15 is formed, the irregularly reflected light is irradiated over a wide range from the lower side portion of the cylindrical cover 2 to both sides of the support leg portion 10 through the void portion 15. Therefore, the irradiation range of each LED lamp 1 is widened, and the entire advertisement face plate 32 can be illuminated uniformly and brightly.

  Further, since the void portion 15 exists between the support 3 and the cylindrical cover 2, the heat radiation area of the LED lamp 1 as a whole can be increased, and the heat generated by the LED can be effectively released, and the heat radiation performance can be reduced. The point is also excellent.

  The straight tube fluorescent lamp type LED lamp for signboards of the present invention is particularly suitable as a display lamp for single-sided signboards.

DESCRIPTION OF SYMBOLS 1 Direct tube fluorescent lamp type LED lamp for signboards 2 Cylindrical cover 3 Support body 4 LED (light emitting diode)
DESCRIPTION OF SYMBOLS 5 Base 6 Terminal 7,7 Locking protrusion 8 Locking groove 10 Supporting leg part 12 Inclined support plate 13 Screw hole 14 Locking protrusion 15 Space part 16 Board | substrate 17 Screw 20 Mounting bracket 21 Main body chassis 22 Socket 23 Power supply (stabilizer)
24 connecting terminal block 30 signboard frame 31 body frame 32 advertising face plate 33 bottom plate

JP 2007-280739 A Utility Model Registration No. 3139714 Japanese Patent No. 4328379 JP 2010-16567 A

Claims (3)

A straight fluorescent tube type LED lamp in which a support extending in the longitudinal direction is provided in a cylindrical cover that transmits light, and a plurality of LEDs are arranged and attached to the support in the longitudinal direction,
The support body has a hollow shape and is provided on the inner bottom portion of the cylindrical cover and has a narrow support leg portion extending in the longitudinal direction, and two inclined supports that are connected to the support leg portion and have a mountain-shaped cross section. A plurality of LEDs are attached to each of the inclined support plates arranged in the longitudinal direction,
A void portion is formed between both side portions of the support body including the two inclined support plates and both side surfaces of the support leg portion, and an inner wall surface of the cylindrical cover ,
A straight tube fluorescent lamp type LED lamp for signboard, wherein the width of the support leg is 10% to 20% with respect to the diameter of the cylindrical cover.   2. The straight tube fluorescent lamp type LED lamp for signboard according to claim 1, wherein the cylindrical cover is made of flame retardant polycarbonate, and the support is made of an aluminum alloy mold material. 3. The straight fluorescent lamp type LED lamp for signboard according to claim 1 or 2, wherein the two inclined support plates are formed in an acute cross-sectional mountain shape.

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