JP5734747B2 - Lighting device - Google Patents

Description

  The present invention relates to an illuminating device including a straight tube lamp (straight tube lamp), an annular lamp (annular tube lamp) and the like, and more particularly to an illuminating device using a solid light emitting element as a light source.

  In recent years, solid state light emitting devices such as semiconductor lasers and light emitting diodes have attracted attention as new light sources that can replace incandescent bulbs and fluorescent lamps as environmental awareness increases. In particular, light-emitting diodes (hereinafter referred to as LEDs) have a long life and high light conversion efficiency, and LED lamps using LEDs as light sources are attracting attention.

  For example, Patent Document 1 discloses a straight tube lamp using an LED as a light source. In this straight tube lamp, a long rectangular substrate on which a plurality of LEDs are mounted is placed on a plate-like heat radiating member extending along the longitudinal direction of the substrate. Being housed. The heat dissipating member is a member for releasing heat generated in the LED during lighting, and the life of the LED can be extended by providing the heat dissipating member to release the heat of the LED. Further, since the heat dissipating member is arranged over the entire area in the longitudinal direction of the straight tube lamp, it also functions as a structure of the straight tube lamp. And in the said structure, in the state where the straight tube | pipe type lamp was attached to the lighting fixture installed in the ceiling, the surface which has the widest area of a heat radiating member is horizontal, ie, the thickness direction of a plate-shaped heat radiating member is It is arranged so as to be parallel to the normal direction of the ceiling surface to which the lighting fixture is attached.

JP 2010-123359 A (released on June 3, 2010)

  However, the straight tube lamp of Patent Document 1 has a problem that warpage occurs due to its own weight or thermal expansion of the case. This is because the case is likely to warp due to its material, and the heat dissipating member that also functions as the structure of the straight tube lamp is not strong in the direction in which the force that generates the warp acts.

  First, the point that the case tends to warp due to the material will be described. In conventional fluorescent lamps, glass has been mainly used as the material of the case. However, LED lamps using solid light emitting elements such as LED bulbs as light sources use synthetic resins such as polycarbonate that have the advantage of being difficult to break. It has been. However, since synthetic resin is more flexible than glass and has a larger thermal expansion, straight tube lamps that use synthetic resin cases tend to be deformed such as warpage due to their own weight or warpage due to thermal expansion. Become.

  Next, a description will be given of the point that the heat dissipation member that also functions as a structure is not firm in the direction in which a force that generates warpage acts. In the case of a straight tube lamp attached to a luminaire installed on a horizontal ceiling, warpage due to its own weight occurs parallel to the vertical direction which is the direction of the vertical line. In this case, the warp is convex downward. On the other hand, warpage due to thermal expansion of the case occurs when the temperature on one side in the circumferential direction of the case rises higher than the other and the degree of thermal expansion differs. In the case of a straight tube lamp mounted on a luminaire installed on a horizontal ceiling, the heat dissipation member is disposed, and the ceiling side of the case becomes hotter than the floor side, so the warp is convex on the ceiling side. It becomes that. This warpage also occurs parallel to the vertical direction. That is, in a straight tube lamp, warpage due to its own weight and warpage due to thermal expansion occur along the normal direction of the ceiling surface on which the lighting fixture is installed.

  In the configuration of Patent Document 1, the heat dissipating member that also functions as a structure is configured such that the surface having the largest area of the heat dissipating member is horizontal, that is, plate-shaped heat dissipating in a state where the straight tube lamp is attached to the lighting fixture. The thickness direction of the member is arranged so as to be parallel to the normal direction of the ceiling surface to which the lighting fixture is attached. Therefore, the heat dissipation member has a small value of the moment of inertia for the cross-sectional moment with respect to the force that causes warping of the case, and the bending rigidity is low, and is a structure that is robust against warping due to its own weight or thermal expansion of a straight tube lamp. is not.

  Although warpage due to its own weight is not as great as that of a straight tube lamp, it can be easily imagined to occur in a large-sized ring lamp, and not only in a straight tube lamp but also in a tubular lamp including a ring lamp, A strong structure is required.

  This invention is made in view of the said subject, The objective is to provide the illuminating device which is hard to produce the curvature by self-weight or thermal expansion.

In order to solve the above problems, the tubular lamp of the present invention includes at least one solid light emitting element, a heat radiating member that radiates heat from the solid light emitting element, and a case member that transmits light from the solid light emitting element. A tubular body configured as a portion, wherein the heat dissipating member is accommodated in the tubular body so as to be parallel to the vertical direction in a mounted state of the lighting device, and the plate An upper peripheral surface portion extending in the circumferential direction of the tubular body at an end portion on the mounting surface side of the lighting device in the shape portion, and the tubular body at an end portion on the opposite side to the mounting surface side of the lighting device in the plate shape portion. A lower peripheral surface portion extending in the circumferential direction and having a smaller circumferential dimension than the upper peripheral surface portion, and the upper peripheral surface portion and the lower peripheral surface portion together with the case member constitute the tubular body. characterized in that it has To have.

  In order to solve the above problems, the tubular lamp of the present invention includes a solid light emitting element, a heat radiating member that radiates heat from the solid light emitting element, and a case member that transmits light from the solid light emitting element. A tubular body configured as at least a part, wherein the heat dissipating member has a plate-like portion accommodated in the tubular body so as to be parallel to the vertical direction in a mounted state of the lighting apparatus. A plurality of the solid-state light emitting elements are alternately arranged on the front and back surfaces of the plate-like portion so that the positions thereof are shifted on the front and back sides.

  ADVANTAGE OF THE INVENTION According to this invention, the illuminating device which cannot produce the curvature by own weight or thermal expansion can be provided.

It is sectional drawing of the direction orthogonal to the longitudinal direction of the straight tube | pipe type lamp which is one Embodiment of this invention. It is a perspective view which shows the external appearance of the said straight tube | pipe lamp. It is a partial cross-sectional perspective view of the principal part corresponded in the center part of the said straight tube | pipe lamp. It is a disassembled perspective view of the said principal part of the said straight tube | pipe lamp. FIG. 5A is a cross-sectional view of a straight tube lamp of a modified example provided with a heat sink provided with a lower peripheral surface portion having the same dimensions as the upper peripheral surface portion, and FIG. 5B is a straight tube of the modified example. It is the vertical light distribution curve figure which measured the illumination intensity for every light distribution angle in a shape lamp. FIG. 5A is a cross-sectional view of a modified straight tube lamp provided with a heat sink provided with only the upper peripheral surface portion, and FIG. 5B is a light distribution angle in the straight tube lamp of the modified example. It is the vertical light distribution curve figure which measured the illumination intensity for every. FIG. 5A is a cross-sectional view of another modified straight tube lamp having a heat sink provided with only the upper peripheral surface portion, and FIG. 5B is a schematic view of the straight tube lamp of the modified example. It is the vertical light distribution curve figure which measured the illumination intensity for every light angle. The structure for improving the heat dissipation provided to the said straight tube | pipe lamp is shown, It is a perspective view of the principal part which shows the plate-shaped part of the heat sink with which the LED board was attached in the said straight tube | pipe lamp. It is AA arrow sectional drawing of FIG. The figure (a) is a surface view which shows the 1st surface side of the LED board in which LED was mounted, The figure (b) is a principal part expansion of the 1st surface in which LED is mounted in a LED board. The figure and the figure (c) are the reverse views which show the 2nd surface side of the LED board arrange | positioned on a heat sink. FIG. 10 is a cross-sectional view of an LED substrate and a plate-like portion corresponding to the cross-sectional view of FIG. 9, showing another configuration for improving heat dissipation applied to the straight tube lamp. The figure (a) is a surface view which shows the 1st surface side of the LED board in which LED was mounted, The figure (b) shows the 2nd surface side of the LED board arrange | positioned on a heat sink. It is a back view. FIG. 9 is a cross-sectional view of an LED substrate and a plate-like portion corresponding to the cross-sectional view of FIG. 8, showing still another configuration for improving the heat radiation performance applied to the straight tube lamp. The figure (a) is a surface view which shows the 1st surface side of the LED board in which LED was mounted, The figure (b) shows the 2nd surface side of the LED board arrange | positioned on a heat sink. It is a back view. FIGS. 7A and 7B show a straight tube lamp according to a modification of the present embodiment, and are sectional views in a direction orthogonal to the longitudinal direction of the straight tube lamp. It is a partial cross section perspective view of the annular lamp which is other forms of implementation of the present invention.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

  1 to 4 show a straight tube lamp 100 of the present embodiment according to the illumination device of the present invention. Among these, FIG. 1 is a sectional view in a direction perpendicular to the longitudinal direction of the straight tube lamp 100, and FIG. 2 is a perspective view showing an appearance of the straight tube lamp 100. 3 is a partial cross-sectional perspective view of the main part corresponding to the central portion of the straight tube lamp 100, and FIG. 4 is an exploded perspective view of the main part of the straight tube lamp 100.

  As shown in any of FIGS. 1 to 4, the straight tube lamp 100 of the present embodiment includes a tubular body 14, an LED substrate 3, a plurality of LEDs (solid light emitting elements) 2, and a heat sink (heat dissipation member). 1, a pair of joint portions 7 a and 7 b, and a pair of bases 8 and 8.

  The tubular body 14 is a cylindrical member at least part of which is constituted by a case member, and houses a plurality of LEDs 2 therein. In the present embodiment, the tubular body 14 is composed of a pair of case members 6 a and 6 b and an upper peripheral surface portion 12 and a lower peripheral surface portion 13 described later, which are a part of the heat sink 1.

  The pair of case members 6a and 6b are curved and elongated members whose longitudinal cross-section has an arc shape. The case members 6 a and 6 b are arranged to face each other with the upper peripheral surface portion 12 and the lower peripheral surface portion 13 interposed therebetween, and the circumferential end portions are joined to the upper peripheral surface portion 12 and the lower peripheral surface portion 13. The case members 6a and 6b are made of a light-transmitting synthetic resin such as polycarbonate, and the portion of the tubular body 14 made of the case members 6a and 6b (hereinafter referred to as the case portion) diffuses the light from the LED 2. The light passes through and becomes the light emitting surface of the straight tube lamp 100. In addition, although the cylindrical shape (straight tube shape) which has a circular cross section is illustrated here as the tubular body 14, you may have an elliptical cross section.

  The LED substrate 3 is made of, for example, a glass epoxy resin. The LED substrate 3 is formed in a long rectangular shape, and a plurality of LEDs 2 are mounted on the first surface 3a. On the first surface 3a of the LED substrate 3, a wiring copper pattern 31 for connecting the LED 2 and a power supply unit (not shown) is formed (see FIG. 9).

  The plurality of LEDs 2 are light sources of the straight tube lamp 100. The plurality of LEDs 2 are arranged so as to be arranged at predetermined intervals along the longitudinal direction of the LED substrate 3. Several LED2 is connected by the copper pattern for wiring mentioned above. As the LED 2, for example, a white LED configured in a surface mount package type is preferably used. In addition, what is shown with the referential mark 9 in a figure is a holding body of each LED2.

  The LED substrate 3 is disposed on the heat sink 1 in a stacked manner. The heat sink 1 is a member for releasing heat generated in the LED 2, and is also a member for releasing heat of the LED substrate 3 transmitted from the LED 2 to the LED substrate 3.

  The heat sink 1 has an elongated shape extending along the longitudinal direction of the LED substrate 3, and is disposed in almost the entire region of the tubular body 14 in the longitudinal direction. As the material of the heat sink 1, aluminum, which is excellent in thermal conductivity and lightweight, is exclusively used.

  In this embodiment, the heat sink 1 is configured to have a plate-like portion 11 that is accommodated inside the tubular body 14 and extends in the axial direction of the tube, as well represented in FIGS. 1 and 4. 3 is attached to this plate-like part 11. Here, the LED substrate 3 is attached so that the second surface 3 b opposite to the first surface 3 a on which the LED 2 is mounted is in surface contact with the plate-like portion 11. By bringing the LED substrate 3 and the heat sink 1 into surface contact in this way, the heat generated in the LED 2 can be efficiently transmitted to the heat sink 1 and released.

  Further, since the heat sink 1 is disposed almost in the entire axial direction (longitudinal direction) of the tube of the tubular body 14, as described above, in addition to the function as a heat dissipation member, the shape of the tubular body 14 is directly maintained. It also functions as a structure of the tube lamp 100. In the present embodiment, in order to make the structure stronger against warping, the plate-like portion 11 accommodated inside the tubular body 14 in the heat sink 1 that also functions as a structure is used as a lighting fixture or the like in which the straight tube lamp 100 is not shown. In the attached state, the direction is parallel to the direction in which the force that generates the warp acts.

  In the lighting device 100 attached to a lighting fixture installed on a horizontal ceiling surface or the like, a force that generates a warp due to its own weight acts in the vertical direction, which is the direction of the vertical line. Therefore, in the straight tube lamp 100 of the present embodiment, the plate-like portion 11 in the heat sink 1 is arranged so as to be parallel to the vertical direction with the lighting device 100 attached. In other words, the heat sink 1 has a configuration having the plate-like portion 11 that is accommodated in the tubular body 14 so as to be parallel to the vertical direction in a state in which the straight tube lamp 100 is attached. That is, FIGS. 1 to 4 show a state in which the straight tube lamp 100 is attached to a lighting fixture, and the upper side in FIG. 1 is the ceiling side where the straight tube lamp 100 is attached, The lower side is the floor surface side which is the main irradiated side opposite to the mounting surface side.

  The heat sink 1 that also functions as a structure is arranged in a vertical direction so that the plate-like portion 11 is parallel to the vertical direction in a state where the straight tube lamp 100 is attached. As compared with a case where the tube body 14 is arranged in a horizontal direction so as to be perpendicular to the cross section, the value of the second moment of section with respect to the force that causes the tubular body 14 to warp is increased, and the bending rigidity is increased. As a result, the straight tube lamp 100 has a structure that is firm against warping due to its own weight, and the straight tube lamp 100 according to the present embodiment having such a heat sink 1 is resistant to warping due to its own weight. It becomes.

  Further, in the straight tube lamp 100 of the present embodiment, the case portion of the tubular body 14 has the LED 2 as a heat source disposed on both sides of the plate-like portion 11 of the heat sink 1 so that the ceiling side and the floor side are substantially equal. Therefore, the ceiling side is heated more than the floor side, and there is little risk of warping due to the difference in thermal expansion. However, even if a force that generates a warp due to a difference in thermal expansion is applied to the case portion due to the installation environment or the like, the force is applied in parallel to the vertical direction. Therefore, the structure is firm against warping due to a difference in thermal expansion. That is, it can be set as the structure by which the curvature by the thermal expansion resulting from being easy to heat the ceiling side compared with the floor side does not arise easily.

  Moreover, in the present embodiment, the heat sink 1 has the upper peripheral surface portion 12 extending in the circumferential direction of the tubular body 14 at the upper end portion on the mounting surface side of the straight tube lamp 100 in the plate-shaped portion 11 and is attached to the heat sink 1. A lower peripheral surface portion 13 extending in the circumferential direction of the tubular body 14 is provided at the lower end opposite to the surface side, and the upper peripheral surface portion 12 and the lower peripheral surface portion 13 constitute a part of the tubular body 14. .

  By setting it as such a structure, while being able to improve the heat dissipation of the heat sink 1, the bending strength of the heat sink 1 can be raised and the function as a structure can be improved further.

  That is, since the upper peripheral surface portion 12 and the lower peripheral surface portion 13 of the heat sink 1 constitute a part of the tubular body 14 and a part of the heat sink 1 is exposed to the outside, the heat from the LED 2 transmitted to the heat sink 1 is transmitted. The upper peripheral surface portion 12 and the lower peripheral surface portion 13 can be efficiently diffused to the outside. When the heat sink 1 is not exposed to the outside, it is necessary to increase the heat sink 1 because it is necessary to prevent the temperature rise of the straight tube lamp 100 only by the heat capacity of the heat sink 1, but in the present invention, the heat sink 1 is exposed to the outside air. By increasing the heat dissipating area where heat radiation is possible, the heat sink 1 can be reduced in weight and a sufficient heat dissipating effect can be obtained.

  Further, by providing the upper peripheral surface portion 12 and the lower peripheral surface portion 13 in the heat sink 1, a corner portion R is formed at a portion connecting from the plate-shaped portion 11 to the upper peripheral surface portion 12 and the lower peripheral surface portion 13, thereby the heat sink 1. The bending strength itself increases. Therefore, the straight tube lamp 100 can function as a more rigid structure against warpage due to its own weight or thermal expansion, and can be configured to be more resistant to warpage.

  However, in the configuration in which the upper peripheral surface portion 12 and the lower peripheral surface portion 13 are provided, as shown in FIG. 1, the circumferential dimension of the lower peripheral surface portion 13 is made smaller than the upper peripheral surface portion 12, and the upper peripheral surface portion 12 is more It is preferable that a large amount of heat be dissipated. This is because, since the lower peripheral surface portion 13 is located on the floor side, if the lower peripheral surface portion 13 occupies a large area on the floor side, light distribution is hindered. By making the circumferential dimension of the lower peripheral surface portion 13 smaller than that of the upper peripheral surface portion 12, it is possible to reduce a decrease in illuminance at a portion directly below the straight tube lamp 100 attached to the lighting fixture. And if the target thermal characteristic is acquired only by the upper peripheral surface part 12, it is good also as a structure which exposes only the lower end part of the plate-shaped part 11 outside, without providing the lower peripheral surface part 13, or the said lower end. It is good also as a structure accommodated in case part 6 inside, without exposing a part to the exterior.

  Further, in the configuration in which the plate-like portion 11 on which the LED substrate 3 is laminated is arranged so as to be vertically oriented, the LED substrate 3 is disposed on both the first surface 11a and the second surface 11b of the plate-like portion 11. It is preferable to adopt a configuration for mounting. By attaching the LED substrate 3 to both surfaces of the plate-like part 11 and arranging the LED 2, the light distribution angle can be expanded more than the configuration in which the LED substrate 3 is arranged only on one side of the plate-like part 11, and a straight tube lamp A wide irradiation range of 100 can be secured.

  Further, since the LED substrate 3 is attached to the plate-like portion 11 arranged in the vertical direction, there is light distribution not only on the floor side but also on the ceiling side. For this reason, the lighting state can be brought close to a conventional straight tube fluorescent lamp that emits light in the entire circumferential direction of the tubular body, and the user's uncomfortable feeling can be eased. In addition, when providing the LED board 3 on both surfaces of the plate-shaped part 11, in the straight tube | pipe lamp 100 of this embodiment, the device for improving heat dissipation is performed, and this is mentioned later.

  Furthermore, the LEDs 2 are arranged on both sides of the plate-like portion 11 of the heat sink 1 so that heat is conducted symmetrically on the upper side and the lower side of the case portion 6 and on the case member 6a side and the case member 6b side. Therefore, it is possible to prevent warping due to a difference in thermal expansion.

  Here, the influence on the light distribution angle (light distribution angle of the illumination device) by the lower peripheral surface portion 13 will be described with reference to FIGS. 5 and 6. As shown in FIG. 5 (a), in a straight tube lamp 100A of a modified example provided with a heat sink 1A provided with a lower peripheral surface portion 13 having the same dimensions as the upper peripheral surface portion 12, as shown in FIG. 5 (b). The illuminance at each position is the same on both the ceiling side and the floor side, and the illuminance near 0 degrees, which is directly below the straight tube lamp 100A, is 30%.

  On the other hand, as shown in FIG. 6 (a), in the straight tube lamp 100B of the modified example provided with the heat sink 1B not provided with the lower peripheral surface portion 13, as shown in FIG. 6 (b), the ceiling side The illuminance at each position becomes higher on the floor side, and the illuminance near 0 degrees, which is directly below the straight tube lamp 100B, also exceeds 43%.

  FIG. 5B and FIG. 6B are measurements using a polycarbonate cover having a diffusivity of 52 degrees on the case portion 6 serving as a light emitting surface in the LED 2 having a light distribution angle of 120 degrees. The size on the optical characteristics at which the upper peripheral surface portion 12 and the lower peripheral surface portion 13 can be arranged is determined by the light distribution angle θ of the LED 2. That is, the angle range is (180 degrees−LED light distribution angle) ÷ 2 per one surface side of the plate-like portion 11. The larger the diameter of the tubular body 14, the larger it becomes.

  However, as described above, since the illuminance at the portion directly below the lower peripheral surface portion 13 decreases, the dimension of the lower peripheral surface portion 13 in the circumferential direction is preferably small and may not be provided in terms of optical characteristics.

  In short, the ratio of the heat sink exposed above and below the tubular body 14 depends on the target optical characteristics and thermal characteristics, and the performance of the mounted LED 2 (lm / W, ° C./W, light distribution angle), supplied to the LED 2 The power to be used and the material characteristics (transmittance / diffusivity) of the case portion 6 are determined. In this case, the upper peripheral surface portion 12 may be enlarged within a range where there is no problem in optical characteristics, and the lower peripheral surface portion 13 may be reduced.

  FIG. 5A is a configuration in which the heat radiation area is maximized while minimizing the influence on the light distribution angle, and FIG. 6B has optical characteristics that can secure the widest light distribution angle. Configuration as maximum.

  Next, the light distribution angle (light distribution angle of the illumination device) due to the difference in the mounting position of the LED 2 with respect to the plate-like portion 11 will be described with reference to FIGS. 6 and 7. In the straight tube lamp 100B of the modified example shown in FIG. 6A, the LED 2 is disposed at the center position (the axial position serving as the center of the tube of the tubular body 14) in the heat sink 1B where the lower peripheral surface portion 13 is not provided. . On the other hand, as shown in FIG. 7A, in the straight tube lamp 100C of the modified example, the LED 2 is disposed at a position (floor side) below the center position in the heat sink 1B where the lower peripheral surface portion 13 is not provided. Has been.

  6B and 7B, which are vertical light distribution curve diagrams of the straight tube lamps 100B and 100C, respectively, a straight tube lamp 100B in which the LED 2 is arranged at the center position of the heat sink 1B. However, the illuminance in the horizontal direction is high while maintaining the illuminance directly below, and a wide light distribution can be realized. On the other hand, in the straight tube lamp 100C in which the LED 2 is disposed at a position lower than the center position (floor side) in the heat sink 1B, the illuminance in the horizontal direction is low and the amount of light that circulates to the ceiling side is reduced. Can be extremely high.

  Therefore, for example, one or more straight tube lamps 100C are arranged at the center in the longitudinal direction, and one or more straight tube lamps 100B are arranged at both ends in the same manner, and the like. By combining the light distribution characteristics of the straight tube lamps 100B and 100C, it is possible to realize illumination that can irradiate the floor surface in a wide range as well as directly below and can also distribute light to the ceiling.

  As shown in FIG. 2, the joint portions 7 a and 7 b are end members attached to both ends in the longitudinal direction of the tubular body 14 having a straight tube shape. The joint portions 7a and 7b are attached to both ends in the longitudinal direction of the tubular body 14 in which the LED substrate 3 laminated on the heat sink 1 is accommodated. The joint portions 7a and 7b are formed with circular grooves (not shown) that match the shape of the longitudinal end surface of the tubular body 14, and the longitudinal ends of the tubular body 14 are fitted into the circular grooves. Thus, the joint portions 7 a and 7 b are attached to the end portion of the tubular body 14.

  The opening 10 formed in the joint portion 7a is provided in order to enable connection between the power source provided in the lighting fixture and the LED substrate 3. A connector portion (not shown) electrically connected to the LED substrate 3 is accommodated in the joint portion 7a on the power feeding side. The wiring connected to the power supply on the lighting fixture side is drawn into the joint portion 7a through the opening 10 and connected to the connector portion.

  The bases 8 and 8 are attached to the joint portions 7a and 7b. Each of the caps 8 and 8 is provided with two terminals 8a protruding from each other. Since the straight tube lamp 100 of the present embodiment supplies power to the LED substrate 3 using the connector portion, these terminals 8a and 8a are not used for power supply but are used as attachment members to the lighting fixture.

  In addition, the structure of joint part 7a * 7b is good also as a structure which can be used instead of a straight tube | pipe type fluorescent lamp for the conventional fluorescent lighting fixture, without providing the connector part 5 without providing this. In other words, by connecting the terminals 8a and 8a formed on the caps 8 and 8 to the socket of the fluorescent lamp lighting fixture, the straight tube lamp is mechanically attached to the lighting fixture and electrically connected. Also good. In addition, it can be applied to a type in which a power source is mounted inside a straight tube lamp.

  Then, the device for improving the heat dissipation used when providing the LED board 3 in both surfaces of the plate-shaped part 11 in the heat sink 1 is demonstrated using FIGS. FIG. 8 is a perspective view of a main part showing the plate-like part 11 of the heat sink 1 to which the LED substrate 3 is attached. FIG. 9 is a cross-sectional view taken along line AA in FIG. 10A is a front view showing the first surface 3a side of the LED substrate 3 on which the LED 2 is mounted, and FIG. 10B is a first surface 3a on the LED substrate 3 on which the LED 2 is mounted. FIG. 10C is a back view showing the second surface 3 b side of the LED substrate 3 disposed on the heat sink 1.

  As shown in FIG. 9, a wiring copper pattern 31 and a heat dissipation copper pattern 32 are formed on the LED substrate 3 on which the LED 2 is mounted. As shown in FIG. 10A, the wiring copper pattern 31 is formed on the first surface 3a on which the LED 2 is mounted.

  The heat dissipation copper pattern 32 is formed on the second surface 3b and the position where the LED 2 is mounted on the first surface 3a, as shown in FIGS. 9, 10 (a) and 10 (b). The LED substrate 3 is connected through a through hole 33 penetrating in the thickness direction. And the LED board 3 is attached to the plate-shaped part 11 of the heat sink 1 by surface contact through the copper pattern 32 for heat dissipation formed in the 2nd surface 3b. In such a configuration, the heat generated in the LED 2 is transferred from the heat dissipation copper pattern 32 formed on the first surface 3 a to the heat dissipation copper pattern 32 formed on the second surface 3 b via the through hole 33. And can be efficiently escaped in the thickness direction of the LED substrate 3.

  Subsequently, further ideas will be described with reference to FIGS. FIG. 11 is a cross-sectional view of the LED substrate 30 and the plate-like portion 11 to which another device has been applied, and corresponds to the cross-sectional view of FIG. 12A is a surface view showing the first surface 3a side of the LED substrate 30 on which the LED 2 is mounted, and FIG. 12B is a diagram of the LED substrate 30 arranged on the heat sink 1. FIG. It is a reverse view which shows the surface 3b side of 2. FIG.

  As shown in FIG. 11, in this example, a plurality of LEDs 2 mounted on the LED substrates 30 and 30 arranged on both surfaces of the plate-like portion 11 are alternately placed on the front and back of the plate-like portion 11 at different positions. Has been placed. By adopting such a configuration, the heat of the LED 2 is not concentrated and transmitted from both sides of the heat sink 1 (the plate-like portion 11), so the heat generated by the LED 2 can be transferred more quickly than the configuration of FIG. I can escape.

  FIG. 13 is a cross-sectional view of the LED substrate 30A and the plate-like portion 11 on which another idea has been applied, and corresponds to the cross-sectional views of FIGS. 14A is a front view showing the first surface 3a side of the LED substrate 30A on which the LEDs 2 are mounted, and FIG. 14B is a diagram of the LED substrate 30A arranged on the heat sink 1. As shown in FIG. It is a reverse view which shows the surface 3b side of 2. FIG.

  As shown in FIG. 13, in this example, as in FIG. 11, the plurality of LEDs 2 mounted on the LED boards 30 </ b> A and 30 </ b> A arranged on both surfaces of the plate-like part 11 are positioned on the front and back of the plate-like part 11. 9 are arranged alternately so that the heat generated by the LED 2 can be released more quickly than the configuration of FIG.

  Furthermore, in this example, as shown in FIGS. 14 (a) and 14 (b), in the empty area excluding the mounting position of the LED 2 on the first surface 3a and the formation area of the copper pattern 31 for wiring, A copper pattern 32 and a through hole 33 are additionally formed. Thereby, the heat capacity of the LED board 30A can be increased more than that of the LED board 30 of FIG. 11 by the heat dissipation copper pattern 32 and the through hole 33 added to the empty area. Further, since the heat dissipation copper pattern 32 is formed so as to fill the empty area, it is possible to make the heat uniform on the LED substrate 30A, and the heat dissipation performance can be further improved.

  As described above, the straight tube lamp 100 according to this embodiment includes a plurality of LEDs 2 housed in the tubular body 14 at least partially configured by the case members 6a and 6b, and heat from the LEDs 2. The heat sink 1 has a plate-like portion 11 accommodated in the tubular body 14 so as to be parallel to the vertical direction when the straight tube lamp 100 is attached.

  Thereby, in the heat sink 1 that also functions as a structure of the straight tube lamp 100 that holds the shape of the tubular body 14, the value of the moment of section relative to the force that causes the tubular body 14 to warp is increased, and the bending rigidity is increased. Therefore, a structure that is firm against warping can be obtained, and a structure that is strong against warping can be achieved.

  In the present embodiment, the heat sink 1 is exemplified by the configuration in which the upper peripheral surface portion 12 and the lower peripheral surface portion 13 are provided. However, the width is at least parallel to the direction in which the force that generates the warp acts on the tubular body 14. The plate-shaped part 11 which has arrange | positioned the direction should just be provided.

  FIGS. 15 (a) and 15 (b) show straight tube lamps 100C and 100D according to modifications of the present embodiment. A straight tube lamp 100C of a modification shown in FIG. 15A includes a heat sink 1C composed only of the plate-like portion 11, and the end in the width direction of the plate-like portion 11 arranged in the vertical direction is the tubular body 14C. Part of it. On the other hand, the straight tube lamp 100D of the modification shown in FIG. 15B includes a heat sink 1D composed only of the plate-like portion 11, and the widthwise end portion of the plate-like portion 11 arranged in the vertical direction is It is the structure completely accommodated inside the tubular body 14D without constituting a part of the tubular body 14D. That is, the tubular body 14 </ b> D is configured by only the case portion 6.

  When such a straight tube lamp 100C and the straight tube lamp 100D are compared, the straight tube lamp 100C in which a part of the heat sink 1C is exposed to the outside is more radiant than the straight tube lamp 100D. Are better. However, the strength against warpage is comparable.

  Moreover, in the said embodiment, although the straight tube | pipe type lamp which has a straight tube-shaped tubular body was illustrated as an illuminating device, as shown in FIG. 16, the structure of this invention is employ | adopted as the ring-shaped lamp which has a ring-shaped tubular body. You can also The annular lamp 200 includes an annular tubular body 140 and an annular heat sink 110. The heat sink 110 is configured to have an annular plate-like portion 111 that is accommodated in the tubular body 140 so as to be parallel to the vertical direction when the annular lamp 110 is attached. The annular plate-like portion 111 has a shallow cylindrical shape along the ring of the tubular body 140, and the plate-like portion 111 has a cylindrical surface parallel to the vertical direction in a state where the annular lamp 110 is attached. It is arranged vertically.

  When the ring lamp 200 is attached to a lighting fixture installed on a horizontal ceiling surface or the like, the force that generates warpage due to its own weight acts in the vertical direction, so that the plate-like portion 11 in the heat sink 110 is attached. By adopting a configuration in which the tubular body 140 is accommodated in parallel to the vertical direction, a configuration that is resistant to warping can be achieved.

  The annular lamp 200 is difficult to bend and hardly warp with respect to the straight tube lamp, but warpage due to its own weight tends to occur when the annular size increases. By adopting such a configuration, it is possible to provide a configuration that is strong against warping even if the ring size increases.

  [Summary]
  In order to solve the above problems, the tubular lamp of the present invention includes at least one solid light emitting element, a heat radiating member that radiates heat from the solid light emitting element, and a case member that transmits light from the solid light emitting element. A tubular body configured as a portion, wherein the heat dissipating member has a plate-like portion accommodated in the tubular body so as to be parallel to the vertical direction in a mounted state of the lighting device. It is characterized.

  According to the said structure, the thermal radiation member has a plate-shaped part accommodated in the said tubular body so that it may become parallel to a perpendicular direction in the attachment state of this illuminating device. In addition to the function as a heat radiating member, the heat radiating member also functions as a structure of a lighting device that maintains the shape of the tubular body. In the above configuration, since the plate-like portion in such a heat radiating member is parallel to the vertical direction inside the tubular body when the lighting device is attached, the cross-section of the plate-like portion with respect to the force applied in the vertical direction of the plate-like portion is reduced. The value of the next moment is large and the bending rigidity is high.

  In a lighting device attached to a lighting fixture installed on a horizontal ceiling surface or the like, the force that generates warpage due to its own weight acts in the vertical direction, which is the direction of the vertical line. By adopting a configuration in which the plate-like portions are arranged so as to be parallel to the vertical direction, it is possible to realize a lighting device that is less likely to warp due to its own weight and strong against warping.

  In this case, the heat dissipating member has an upper peripheral surface portion extending in a circumferential direction of the tubular body at an end portion of the plate-shaped portion on the mounting surface side of the lighting device, and the upper peripheral surface portion together with the case member It is preferable to construct a tubular body. The heat dissipating member extends in the circumferential direction of the tubular body at the end of the plate-like portion opposite to the mounting surface side of the lighting device, and has a lower circumferential dimension smaller than the upper circumferential surface portion. It has a surface portion, and the lower peripheral surface portion may constitute the tubular body together with the case member and the upper peripheral surface portion.

  The upper peripheral surface portion of the heat radiating member or the upper peripheral surface portion and the lower peripheral surface portion constitute a part of the tubular body, that is, the heat radiating member is exposed from the case member. By exposing the heat dissipating member to the outside of the case member, the heat dissipating area capable of radiating heat to the outside air is increased, the heat dissipating property of the heat dissipating member is increased, and the weight of the heat dissipating member can be reduced.

  In addition, by providing the upper peripheral surface portion, or the upper peripheral surface portion and the lower peripheral surface portion, heat is dissipated by the corner portion formed between the plate-shaped portion and the upper peripheral surface portion and between the plate-shaped portion and the lower peripheral surface portion. The bending strength itself of the member is increased, and the member can function as a structure that is more robust against warping.

  However, in the configuration in which the upper peripheral surface portion and the lower peripheral surface portion are provided, the circumferential dimension of the lower peripheral surface portion is made smaller than that of the upper peripheral surface portion so that more heat is dissipated in the upper peripheral surface portion. preferable. This is because the lower peripheral surface portion is located on the floor side, and if the lower peripheral surface portion occupies a large area on the floor side, light distribution is hindered. By making the circumferential dimension of the lower peripheral surface portion smaller than that of the upper peripheral surface portion, it is possible to reduce a decrease in illuminance at a portion directly below the lighting device attached to the lighting fixture.

  In this case, it is further preferable that the solid light emitting elements are disposed on both surfaces of the plate-like portion.

  By attaching solid light emitting elements to both sides of a plate-like part whose width direction is arranged in the vertical direction, the light distribution angle can be expanded compared to a configuration in which the solid light-emitting elements are arranged only on one side of the plate-like part, and the lighting device It is possible to ensure a wide irradiation range.

  In addition, since the solid light-emitting element is attached to the plate-like part arranged in parallel to the vertical direction, there is light distribution not only on the floor side but also on the ceiling side, and the entire area in the circumferential direction of the tubular body is similar to that when lighting. It can be brought close to a conventional tubular fluorescent lamp that emits light, and the user's uncomfortable feeling can be eased.

  Moreover, in arranging a board | substrate on both surfaces of a plate-shaped part, it is preferable to set it as the structure arrange | positioned alternately by shifting the position further on the front and back of a plate-shaped part.

  According to this, since the heat of the solid state light emitting element is not concentrated and transmitted from both sides to the plate-like portion of the heat radiating member, the heat generated in the solid state light emitting element can be quickly released.

  In the illuminating device of the present invention, it is preferable that the tubular body is composed of the case member and a part of the heat radiating member, and a part of the heat radiating member is exposed.

  According to this, by exposing the heat radiating member to the outside of the case member, it is possible to increase the heat radiating area capable of radiating heat to the outside air, improve the heat radiating property of the heat radiating member, and reduce the weight of the heat radiating member. .

1,1A ~ 1D Heat sink (heat dissipation member)
2 LED
3 LED board 5 Connector part 6 Case part 6a Case member 7a Joint part 8 Base 8a Terminal 10 Opening 11 Plate-shaped part 12 Upper peripheral surface part 13 Lower peripheral surface parts 14, 14C, 14D Tubular body 30 LED board 30A LED board 31 Copper for wiring Pattern 32 Copper pattern for heat dissipation 33 Through hole 52 Diffusivity 100, 100A to 100D Straight tube lamp (lighting device)
110 heat sink 111 plate-like part 120 light distribution angle 140 tubular body 200 annular lamp (illumination device)
θ Light distribution angle

Claims (3)

A solid state light emitting device;
A heat dissipating member that dissipates heat from the solid state light emitting device;
A tubular body configured with at least a part of a case member that transmits light from the solid-state light emitting element,
The heat dissipation member includes a plate-like portion which is housed in the tubular body to form a parallel to the vertical direction in the mounted state of the lighting device, said tubular body on an end portion of the mounting surface side of the lighting device in the plate-like portion The upper peripheral surface portion extending in the circumferential direction and the end of the plate-like portion opposite to the mounting surface side of the lighting device extend in the circumferential direction of the tubular body, and the dimension in the circumferential direction than the upper peripheral surface portion A lower peripheral surface portion, and
The lighting device, wherein the upper peripheral surface portion and the lower peripheral surface portion constitute the tubular body together with the case member . A solid state light emitting device;
A heat dissipating member that dissipates heat from the solid state light emitting device;
A tubular body configured with at least a part of a case member that transmits light from the solid-state light emitting element,
The heat dissipation member may have a plate-like portion which is housed in the tubular body to form a parallel to the vertical direction in the mounted state of the lighting device,
The lighting device according to claim 1, wherein a plurality of the solid-state light emitting elements are alternately arranged on both the front and back surfaces of the plate-like portion with the positions shifted on the front and back sides . It said tubular body is composed of a part of the case member and the heat dissipation member, an illumination device according to claim 1 or 2, wherein a portion of the heat dissipation member is exposed.

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