JP2012079610A - Fluorescent lamp type led lamp - Google Patents

Abstract

The present invention provides a fluorescent lamp type LED lamp that improves the direction dependency of LED irradiance, improves the ease of assembling a lamp member, reduces the weight of the lamp, and improves heat dissipation.
A mounting substrate on which LED elements are mounted along the longitudinal direction, a heat radiating member having the substrate mounted on one side and a radiating fin on the other side, and a slit portion between both end portions along the longitudinal direction And a light-transmitting cover member having a heat-dissipating member attached to the slit portion, the heat-dissipating members being connected to each other at the end in the circumferential direction, and the cover inner surface side along the longitudinal direction A convex guide is provided, the board mounted on the heat radiating member faces the inner surface side of the cover member, the heat radiating fin faces the outer surface side, and the LED element mounted on the board has its highest illuminance at different parts of the inner surface of the cover member The fluorescent lamp type LED lamp is disposed so as to be irradiated with a clamp portion that sandwiches the end portions along the longitudinal direction of the cover member on the heat dissipating members at both ends.
[Selection] Figure 4

Description

  The present invention relates to a fluorescent LED lamp that is improved in direction dependency of LED illuminance, improved ease of assembly of a lamp member, reduced weight of the lamp, and improved heat dissipation.

  The LED fluorescent lamp type lamp has an advantage of low power consumption and long life even at the same brightness as that of a normal fluorescent lamp, and is therefore widely used in place of the fluorescent lamp.

  Here, the fluorescent lamp is a luminaire widely used mainly for indoor general lighting. For example, in Japan, a commercial 100V power supply is used, and a straight tube fluorescent lamp defined in JIS C7617 is used. A lighting fixture that is attached.

  The LED mounting substrate used for the fluorescent lamp type LED lamp is usually a flat plate. Since the illuminance has directionality in addition to the substrate shape, the illuminance in the direction perpendicular to the light emitting surface of the LED chip is the highest, and the illuminance decreases as the angle increases with respect to the vertical direction. For this reason, the light radiated | emitted from the LED element of the LED mounting substrate is not irradiated uniformly to the translucent cover member of a lamp | ramp. Considering that a general fluorescent lamp has no directionality, unevenness in illuminance occurs when a fluorescent LED lamp is replaced with a conventional fluorescent lamp application. Therefore, improvement in the direction dependency of the illuminance of irradiated light is demanded.

  In addition, the fluorescent lamp type LED lamp has an advantage that it has a long life. However, since it is more expensive than a normal fluorescent lamp, it is desired to reduce the price. From the viewpoint of reducing the price, it is required to facilitate the assembly of the LED mounting substrate and the translucent cover member to the heat dissipation member.

  Further, from the viewpoint of ease of mounting and removal of the fluorescent lamp type LED lamp on the ceiling or wall and the safety thereof, it is also required to reduce the weight of the fluorescent lamp type LED lamp.

  In general, the luminous efficiency of an LED is not proportional to the current value, but increases exponentially with respect to the current value. Therefore, the larger the current, the higher the luminous efficiency but the heat generation amount. With respect to such an increase in the amount of generated heat, a heat radiating fin with higher cooling performance is required.

  Patent Document 1 describes an LED lamp in which an elongated heat dissipation substrate is housed in a light-transmitting cover member having a fluorescent lamp shape, and a plurality of LED chips are mounted on the heat dissipation substrate. The direction dependency of the irradiance is improved by arranging the heat dissipating boards on which the LED chips are mounted so that adjacent ones form an obtuse angle. However, there remains a problem that the heat sink substrates are not easily assembled.

  Patent Document 2 describes an illuminating device that has improved cooling performance by providing an outer heat radiating portion for radiating heat on the outer side of a translucent cover member and an inner heat radiating portion for radiating heat on the inner side. Moreover, in this illuminating device, the assembly | attachment is made easy by using the clamp of an outer side thermal radiation part for attaching a thermal radiation part to a translucent cover member. However, there still remain problems such as a positioning method for assembling the LED mounting substrate and improvement in the direction dependency of irradiance.

  Patent Document 3 describes a light emitting device in which a mounting portion of an LED mounting substrate includes a plurality of rail-shaped holders. In this light emitting device, assembling is facilitated so that the LED mounting substrate can be slidably attached and detached along the rail-shaped holder. However, since the LED mounting substrate is not arranged along the outer periphery of the cylindrical translucent cover member, there is a problem that the light emitted from the LEDs is not uniformly irradiated onto the translucent cover member.

  Patent Document 4 describes an LED lamp in which a heat dissipation member connected to an LED substrate is provided with unevenness and a plurality of vent holes to secure a large contact area with the outside air and improve heat dissipation. Yes. However, since the flat lamp including the LED substrate has a structure that is simply housed in a cylindrical translucent case, the direction dependency of the irradiance is not improved, and the light emitted from the LED is translucent. There was a problem that the uniform case was not irradiated uniformly.

Utility Model Registration No. 3153179 JP 2010-062023 A JP 2008-277174 A JP 2009-267007 A

  The present invention has been made in view of the above problems, and the direction dependency of the irradiance is improved so that the entire irradiation range has a uniform illuminance, and the LED mounting substrate and the translucent cover member are assembled to the heat radiating member. An object of the present invention is to provide a fluorescent-type LED lamp that is excellent in attachment, excellent in lightness from the viewpoint of easy attachment and detachment and safety, and further improved in heat dissipation effect by a heat dissipation fin.

The present invention according to claim 1, wherein at least one LED mounting substrate on which a plurality of LED elements are mounted along the longitudinal direction of the base portion;
Each LED mounting board is mounted along the longitudinal direction of one side, and one or more heat radiating members having each radiating fin along the longitudinal direction on the other side;
A translucent cover member having a substantially cylindrical shape, having a slit portion extending between both end portions along the longitudinal direction, and the one or more heat radiating members attached to the slit portion; A fluorescent lamp type LED lamp comprising:
The one or more heat dissipating members are connected to each other at a predetermined angle at the end portions in the circumferential direction, and a convex strip along the longitudinal direction is formed on the inner surface side of the translucent cover member of each connecting portion. Each has its own guide
Each LED mounting board mounted on one side of each heat radiating member faces the inner surface side of the light transmissive cover member, and each heat radiating fin on the other side of each heat radiating member is connected to the light transmissive cover member. Each LED element is directed to the outer surface side so that emitted light from each LED element mounted on each LED mounting substrate is irradiated as its maximum illuminance at different portions of the inner surface of the translucent cover member. Has been placed,
Fluorescent lamps characterized in that the heat dissipating members at both ends of the connected one or more heat dissipating members are provided with clamp portions that sandwich the end portions along the longitudinal direction of the translucent cover member. Type LED lamp.

  According to a second aspect of the present invention, the heat dissipating fin is provided with a plurality of notches along a circumferential direction.

  According to a third aspect of the present invention, at least one hole penetrating along the longitudinal direction is provided in the base portion of the LED mounting substrate.

  According to a fourth aspect of the present invention, each heat dissipating member having heat dissipating fins is made of aluminum or an aluminum alloy.

In the fluorescent lamp type LED lamp according to the present invention, the direction dependency of irradiance is improved, the LED mounting substrate and the translucent cover member are easily assembled to the heat radiating member, and the light weight and heat radiating property are also excellent. .

It is a perspective view of the fluorescent lamp type LED lamp which concerns on this invention. (A) is a top view of the LED mounting board used for the fluorescent lamp type LED lamp which concerns on this invention, (b) is AA sectional drawing of (a). It is a perspective view which shows the state which attached the LED mounting board to the heat radiating member used for the fluorescent lamp type LED lamp which concerns on this invention. It is sectional drawing along the circumferential direction of the fluorescent lamp type LED lamp which concerns on this invention. It is explanatory drawing which attaches an LED mounting board to the heat radiating member used for the fluorescent lamp type LED lamp which concerns on this invention. It is a perspective view of the radiation fin used for the fluorescent lamp type LED lamp which concerns on this invention.

  As shown in FIG. 1, the fluorescent lamp type LED lamp 1 according to the present invention includes one or more LED mounting boards 2 on which LED elements (not shown) are mounted, and each LED mounting board 2 mounted on one side. On the other side, one or more heat radiating members 3 having the respective heat radiating fins 31 and a translucent cover member 4 having one or more heat radiating members 3 attached to the slit portions 41 are provided. In addition, in FIG. 1, although the heat radiating member 3 and the LED mounting substrate 2 are illustrated as three each, it is not limited to this. Below, each member is demonstrated.

A. LED Mounting Board As shown in FIG. 2A, the LED mounting board 2 includes a base 21 and a plurality of LEDs mounted thereon along the longitudinal direction L of the base 21 (the same as the longitudinal direction of the fluorescent lamp type LED lamp). LED elements (light emitting diode elements) 22. As shown in FIG. 2B, the base portion 21 of the LED mounting substrate 2 is preferably provided with one or more holes 23 penetrating along the longitudinal direction. FIG.2 (b) is AA sectional drawing of Fig.2 (a). These holes 23 can reduce the weight of the fluorescent lamp type LED lamp. The LED mounting substrate 2 is required to have high rigidity in the longitudinal direction L in order to ensure ease of attachment. However, by providing one or more holes 23 penetrating along the longitudinal direction L, the LED mounting substrate 2 can be It is possible to reduce the weight while securing the rigidity at L. FIG. 3 is a perspective view showing a state in which each LED mounting substrate 2 is attached to each heat radiating member 3 having the heat radiating fins 31. Since each LED mounting substrate is attached to each heat radiating member by an adhesive, it can be attached more easily than screwing.

B. Heat dissipation member B-1. Arrangement of Heat Dissipation Member As shown in FIG. 4, the heat dissipation members 3 adjacent to each other are sequentially connected at a circumferential end with a predetermined angle. In order for light emitted in a direction perpendicular to the light emitting surface of the LED element 22 to be incident substantially perpendicular to the inner surface of the translucent cover member 4, the angle exceeds 90 ° and is less than 180 ° Is preferable. Each heat radiating member 3 faces each LED mounting board 2 mounted on one side thereof toward the inner surface side of the light transmissive cover member 4, and the other heat radiating fin 31 of each heat radiating member is directed to the light transmissive cover member 4. It faces the outside.

B-2. Assembly of Translucent Cover Member to Heat Dissipation Member As shown in FIG. 4, the three connected heat dissipation members 3 are attached to the slit portions 41 of the translucent cover member 4. The heat radiating members 3 at both ends of the three heat radiating members 3 are respectively provided with clamp portions 32 on the end side along the longitudinal direction of the translucent cover member. By these both clamp parts 32, the translucent cover member is attached by sandwiching the end along the longitudinal direction of the translucent cover member. The shape of the clamp portion 32 is preferably a U-shape. Since the translucent cover member 4 can be easily assembled to the heat radiating member 3 along the longitudinal direction (L) of the fluorescent lamp type LED lamp, and the U-shape is easy to make when manufactured by extrusion molding. It is. In order to prevent the translucent cover member 4 from being easily detached from the clamp portion 32 in the circumferential direction, the slit portion 41 is more than half of the entire circumferential direction including the translucent cover member 4 and the slit portion 41. A small ratio is preferred. This ratio is appropriately selected depending on the weight of the translucent cover member.

B-3. Assembling the LED mounting substrate to the heat dissipation member As shown in FIG. 4, a ridge guide 33 is provided along the longitudinal direction on the inner surface side of each connection portion between the heat dissipation members 3. By providing the convex guide 33 at the connecting portion, the rigidity of the heat radiating member 3 in the circumferential direction can be improved. As shown in FIG. 5, these ridge guides 33 are formed in a rib shape such that the roots are perpendicular to the installation surface of the LED mounting substrate 2 in each heat radiating member 3, so that the heat radiating member of the LED mounting substrate 2. Assembling by bonding to 3 becomes easy.

B-4. Direction dependency of LED irradiance As described above, the illuminance in the direction perpendicular to the light emitting surface of the LED element is the highest, and the illuminance decreases when the angle deviates from the vertical direction. As shown in FIG. 4, in the fluorescent lamp type LED lamp 1 according to the present invention, the heat radiating member 3 is provided in the slit portion 41 of the translucent cover member 4 so as to be a part of the outer periphery. The side on which each LED mounting substrate 2 is mounted faces the inner surface side of the translucent cover member 4, and the light emitted in the direction perpendicular to the light emitting surface of the LED element 22 on each LED mounting substrate 2 is The light passes through substantially the center of the fluorescent lamp type LED lamp 1 and is incident substantially perpendicularly to the opposing portion of the translucent cover member 4. The incident light has the highest illuminance among the light emitted from the same LED element 22. The light with the highest illuminance emitted from the three LED elements 22 shown in FIG. 4 irradiates different portions P 1, P 2, P 3 on the inner surface of the translucent cover member 4. Similarly, in the cross section different from the cross section shown in FIG. 4, the light with the highest illuminance emitted from each LED element irradiates a different portion of the inner surface of the translucent cover member. As a result, each illuminance light emitted from all the LED elements in the lamp irradiates different portions of the inner surface of the translucent cover member, and the entire inner surface of the translucent cover member is uniform. Irradiate with high illuminance. Thus, in the present invention, the direction dependency of the LED irradiance is remarkably improved.

B-5. Heat Dissipation Fin As shown in FIG. 4, the heat dissipation member 3 has a heat dissipation fin 31 facing the outer surface side of the translucent cover member 4. By making the cross-sectional shape along the circumferential direction of the radiation fin 31 the same, the radiation fin can be easily manufactured by extrusion molding. As shown in FIG. 6, it is preferable to provide a plurality of notches 34 in the radiating fin 31 along the circumferential direction of the lamp. By this notch 34, the air between the grooves 35 extending in the longitudinal direction via the fins 31 is also communicated in the circumferential direction, and is transmitted from the LED element of the LED mounting substrate to the base, and further from the base to the heat dissipation member and dissipated to the outside. The propagation of heat is smooth. As a result, the cooling effect on the LED mounting substrate is further increased, and a larger current can be passed, thereby improving the light emission efficiency.
In addition, as a material of the heat radiating member including the heat radiating fins, it is preferable to use an aluminum material or an aluminum alloy material excellent in thermal conductivity.

Translucent Cover Member As shown in FIG. 4, the translucent cover member 4 has a substantially cylindrical shape, and has slit portions 41 extending between both end portions along the longitudinal direction. The connected heat dissipation member 3 is attached to the slit portion 41. The material of the translucent cover member is not limited as long as it is a material having appropriate light transmittance, light diffusibility, strength, elasticity, and weight, but polycarbonate is preferably used.

  According to the fluorescent lamp type LED lamp according to the present invention, it is possible to reduce the directionality of the LED irradiance and to easily attach the LED mounting substrate and the translucent cover member to the heat radiating member. Further, by providing one or more holes penetrating along the longitudinal direction of the LED mounting substrate, it is possible to reduce the weight of the fluorescent lamp type LED lamp. Furthermore, by providing a notch along the circumferential direction of the radiating fin, the cooling effect by the radiating fin can be improved and the luminous efficiency can be increased.

DESCRIPTION OF SYMBOLS 1 ... Fluorescent lamp type LED lamp 2 ... LED mounting board 21 ... Base part 22 ... LED element 23 ... Hole 3 ... Radiation member 31 ... Radiation fin 32 ... Clamp part 33 ... Projection guide 34 ... Notch 35 ... Groove 4 ... Translucent cover member 41 ... Slit part L ... Longitudinal direction of LED mounting substrate and fluorescent lamp type LED lamp P1 , P2, P3... Inner surface portion of translucent cover member irradiated with light of maximum illuminance of LED radiation

Claims (4)

One or more LED mounting boards on which a plurality of LED elements are mounted along the longitudinal direction of the base;
Each LED mounting board is mounted along the longitudinal direction of one side, and one or more heat radiating members having each radiating fin along the longitudinal direction on the other side;
A translucent cover member having a substantially cylindrical shape, having a slit portion extending between both end portions along the longitudinal direction, and the one or more heat radiating members attached to the slit portion; A fluorescent lamp type LED lamp comprising:
The one or more heat dissipating members are connected to each other at a predetermined angle at the end portions in the circumferential direction, and a convex strip along the longitudinal direction is formed on the inner surface side of the translucent cover member of each connecting portion. Each has its own guide
Each LED mounting board mounted on one side of each heat radiating member faces the inner surface side of the light transmissive cover member, and each heat radiating fin on the other side of each heat radiating member is connected to the light transmissive cover member. Each LED element is directed to the outer surface side so that emitted light from each LED element mounted on each LED mounting substrate is irradiated as its maximum illuminance at different portions of the inner surface of the translucent cover member. Has been placed,
Fluorescent lamps characterized in that the heat dissipating members at both ends of the connected one or more heat dissipating members are provided with clamp portions that sandwich the end portions along the longitudinal direction of the translucent cover member. Type LED lamp.   The fluorescent lamp type LED lamp according to claim 1, wherein the radiating fin is provided with a plurality of notches along a circumferential direction.   The fluorescent lamp type LED lamp according to claim 1 or 2, wherein at least one hole penetrating along a longitudinal direction is provided in a base portion of the LED mounting substrate.   The fluorescent lamp type LED lamp according to any one of claims 1 to 3, wherein each heat dissipating member having the heat dissipating fins is made of aluminum or an aluminum alloy.

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