JP2015153572A - Led lighting lamp and manufacturing method of led lighting lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED lighting lamp which attenuates light in a specific wavelength region and which can properly emit light in the wavelength regions other than that.SOLUTION: An LED lighting lamp A1 includes: an LED light-emitting part 2 including a plurality of LED chips; an elongated support member 1 for supporting the LED light-emitting part 2; a cylindrical translucent cover 3 for accommodating the LED light-emitting part 2 and the support member 1 and for transmitting the light from the LED light-emitting part 2; and a pair of bases 5 located on both ends of the support member 1. The LED light lamp A1 also includes a filter tube 6 which attenuates the light in one part of wavelength regions out of the light which has transmitted the translucent cover 3 and which is adhered to at least one part of the translucent cover 3 by thermal shrinkage. Between both ends of the translucent cover 3 and the pair of bases 5, a gap exists in an axial direction of the translucent cover 3.

Description

  The present invention relates to an LED illumination lamp and a method for manufacturing the LED illumination lamp.

  For the purpose of power saving, an LED illuminating lamp having an LED light emitting unit has been proposed as an illuminating means replacing the fluorescent lamp. FIG. 15 shows an example of a conventional LED illumination lamp (see Patent Document 1). The LED illuminating lamp X shown in the figure includes a support member 91, an LED light emitting unit 92, a translucent cover 93 and a power supply unit 94. The translucent cover 93 has a cylindrical shape and houses a support member 91, a plurality of LED light emitting units 92, and a power supply unit 94. The support member 91 supports the LED light emitting unit 92 and can fulfill the function of promoting heat dissipation from the LED light emitting unit 92. The LED light emitting unit 92 includes a plurality of LED modules arranged on a support member 91 along the axial direction of the light transmissive diffusion cover 93 and a substrate that supports these LED modules. The power supply unit 94 converts, for example, commercial 100V power into DC power suitable for the light emission of the LED light emitting unit 92. The translucent cover 93 is to transmit the light from the LED light emitting unit 92 while diffusing, and is made of, for example, a material in which a diffusing material such as white is mixed in a transparent resin material. The LED illumination lamp X is used as a substitute for a general straight tube fluorescent lamp.

  The straight tube fluorescent lamp is generally used for lighting in a residence or a workplace, and emits white light such as so-called daylight white color or daylight color. Furthermore, as an application of the straight tube fluorescent lamp, there is illumination in a so-called yellow room. The yellow room is an area caused by light attenuated in a specific wavelength region in order to perform a photolithography process using a photosensitive material in a clean room. In order to use the LED illuminating lamp X for such an application, a measure for attenuating light in a specific wavelength range is required. In addition, this measure needs to be taken in consideration of the difference in principle and structure between the LED illumination lamp X and the straight tube fluorescent lamp.

JP 2004-335426 A

  The present invention has been conceived under the circumstances described above, and is an LED illumination lamp capable of attenuating light in a specific wavelength range and appropriately emitting light in other wavelength ranges. The issue is to provide.

  The LED illuminating lamp provided by the first aspect of the present invention includes an LED light emitting unit including a plurality of LED chips, an elongated support member that supports the LED light emitting unit, the LED light emitting unit, and the support member. And a pair of caps located at both ends of the support member, the LED illuminating lamp comprising: a translucent cover that transmits light from the LED light-emitting unit; A filter tube that attenuates light in a part of the wavelength range of the transmitted light and is in close contact with at least a part of the translucent cover by heat shrinkage; and both ends of the translucent cover and the pair A gap exists between at least one of the caps in the axial direction of the translucent cover.

  In a preferred embodiment of the present invention, the pair of bases is fixed to the support member and is movable relative to the light-transmitting cover.

  In preferable embodiment of this invention, the thermal expansion coefficient of the said translucent cover is larger than the thermal expansion coefficient of the said supporting member.

  In a preferred embodiment of the present invention, the translucent cover has a cylindrical shape.

  In preferable embodiment of this invention, the said translucent cover diffuses the light from the said LED light emission part.

  In preferable embodiment of this invention, the wavelength range which the said filter tube attenuates is 380 nm-570 nm.

  In a preferred embodiment of the present invention, the filter tube covers all of the portion of the translucent cover exposed from the base.

  In preferable embodiment of this invention, the said filter tube is closely_contact | adhered to all the parts exposed from the said nozzle | cap | die among the said translucent covers.

  In a preferred embodiment of the present invention, the filter tube covers a part of the pair of caps.

  In a preferred embodiment of the present invention, the base has a tapered portion whose size decreases as it goes from the outside to the inside in the axial direction, and at least a portion is covered with the filter tube.

  In a preferred embodiment of the present invention, the filter tube is made of a polyester resin.

  In a preferred embodiment of the present invention, the LED light emitting unit includes a plurality of LED modules each having the LED chip, a translucent resin covering the LED chip, and a mounting terminal.

  In a preferred embodiment of the present invention, the translucent resin is mixed with a fluorescent material that emits light having a wavelength different from that of the light from the LED chip when excited by the light from the LED chip.

  In a preferred embodiment of the present invention, light in the wavelength region emitted from the LED chip has a larger attenuation factor by the filter tube than light in the wavelength region emitted from the fluorescent material.

  In a preferred embodiment of the present invention, the LED light emitting unit has a substrate on which the plurality of LED modules are mounted.

  In a preferred embodiment of the present invention, the substrate is fixed to the support member.

  In a preferred embodiment of the present invention, the substrate has a long rectangular shape that is elongated in the axial direction of the translucent cover.

  In a preferred embodiment of the present invention, each of the pair of caps has a cylindrical portion having the same axial direction as the light-transmitting cover, and portions near both ends of the light-transmitting cover are the pair of light-transmitting covers. It is accommodated in the cylindrical portion of the base.

  In a preferred embodiment of the present invention, the base is configured such that the translucent cover in the radial direction of the translucent cover is on the side where the LED light emitting unit is disposed with respect to the support member in the radial direction of the translucent cover. It has an output side projection that sandwiches the cover together with the cylindrical portion.

  In a preferred embodiment of the present invention, the cylindrical portion extends inward in the axial direction of the translucent cover from the emission-side projection.

  In a preferred embodiment of the present invention, a distance between the cylindrical portion and the emission-side protrusion in the radial direction of the translucent cover is greater than a thickness of the translucent cover.

  In a preferred embodiment of the present invention, the emission-side protrusion has an arc shape when viewed in the axial direction of the translucent cover.

  In a preferred embodiment of the present invention, the base has a counter-emission-side protrusion located on the opposite side of the LED light emitting portion with a support member in the radial direction of the translucent cover interposed therebetween.

  In a preferred embodiment of the present invention, the anti-emission side protrusion has a light transmitting cover holding portion that sandwiches the light transmitting cover together with the cylindrical portion in a radial direction of the light transmitting cover.

  In a preferred embodiment of the present invention, a distance between the cylindrical portion and the translucent cover holding portion in the radial direction of the translucent cover is greater than a thickness of the translucent cover.

  In a preferred embodiment of the present invention, the translucent cover holding part has an arc shape when viewed in the axial direction of the translucent cover.

  In a preferred embodiment of the present invention, the anti-emission side protrusion has a support member holding portion to which the support member is fixed.

  In a preferred embodiment of the present invention, the support member has a top plate portion that supports the LED light emitting portion, and a pair of side plate portions that extend from both ends of the top plate portion to the opposite side of the LED light emitting portion. The support member holding portion of the counter-projection side protrusion of the base is fixed to the pair of side plate portions.

  In preferable embodiment of this invention, the said supporting member holding | maintenance part is being fixed to the radial direction inner side part of the said translucent cover among said pair of side plate parts.

  In a preferred embodiment of the present invention, each side plate portion is provided with an outer rib protruding outward in the width direction of the top plate portion, and the translucent cover is provided with the top plate portion. An inward rib that protrudes inward in the width direction and engages with the outward rib of the heat dissipation member is provided.

  In a preferred embodiment of the present invention, the opposite-projection-side protrusion extends inward in the axial direction of the translucent cover from the cylindrical portion.

  The manufacturing method of the LED illuminating lamp provided by the second aspect of the present invention has a cylindrical shape in which an LED light emitting unit including a plurality of LED chips is supported by a support member and light from the LED light emitting unit is transmitted. A step of accommodating the support member in the translucent cover and fixing a pair of caps to both ends of the support member so as to leave a gap between both ends of the translucent cover in the axial direction of the translucent cover; A filter tube that attenuates light in a part of the wavelength region of the light transmitted through the translucent cover and has heat shrinkability is mounted on the translucent cover so as to cover at least a part of the translucent cover And a step of bringing the filter tube into close contact with at least a part of the translucent cover by heating the filter tube.

  According to such a configuration, a gap exists in the axial direction between the translucent cover and the base. Since the filter tube is mounted by heat shrinkage, it is assumed that the light transmitting cover expands in the axial direction by heating. Even if this expansion occurs, it is possible to avoid the end of the translucent cover from coming into contact with the base due to the presence of the gap. When the end portion of the translucent cover and the base come into contact with each other, for example, the translucent cover may be unjustly deformed or damaged. According to the LED illuminating lamp, there is little such a fear, and the filter tube can be appropriately attached. Therefore, it is possible to attenuate light in a specific wavelength region and appropriately emit light in other wavelength regions.

  Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the accompanying drawings.

It is a partially cutaway side view which shows the LED illuminating lamp based on 1st embodiment of this invention. It is sectional drawing which follows the II-II line | wire of FIG. It is principal part sectional drawing in alignment with the III-III line of FIG. It is a principal part expanded sectional view which shows the LED illuminating lamp of FIG. It is a principal part expanded sectional view which shows the LED illuminating lamp of FIG. It is sectional drawing which follows the VI-VI line of FIG. It is sectional drawing which shows the LED module of the LED illuminating lamp of FIG. It is principal part sectional drawing which shows the manufacturing method of the LED lighting lamp of FIG. It is principal part sectional drawing which shows the manufacturing method of the LED lighting lamp of FIG. It is principal part sectional drawing which shows the manufacturing method of the LED lighting lamp of FIG. It is a principal part expanded sectional view which shows the LED illuminating lamp based on 2nd embodiment of this invention. It is a principal part expanded sectional view which shows the LED illuminating lamp of FIG. It is principal part sectional drawing which shows the LED illuminating lamp based on 3rd embodiment of this invention. It is principal part sectional drawing which shows the manufacturing method of the LED lighting lamp of FIG. It is sectional drawing which shows an example of the conventional LED illumination light.

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

  1-6 has shown the LED illumination light based on 1st embodiment of this invention. The LED illuminating lamp A <b> 1 of the present embodiment includes a support member 1, an LED light emitting unit 2, a translucent cover 3, a power supply unit 4, a pair of caps 5, and a filter tube 6. The LED illuminating lamp A1 is intended to be used as an alternative to a general straight tube fluorescent lamp. For example, the LED illuminating lamp A1 is attached to a power supply unit 82 installed on a ceiling 81 as shown in FIG. The

  FIG. 1 is a partially cut side view showing the LED illuminating lamp A1. 2 is a cross-sectional view taken along line II-II in FIG. FIG. 3 is a cross-sectional view of an essential part taken along line III-III in FIG. FIG. 4 is an enlarged cross-sectional view showing a main part of the LED illuminating lamp A1. FIG. 5 is an enlarged cross-sectional view showing a main part of the LED illumination lamp A1. 6 is a cross-sectional view taken along the line VI-VI in FIG. In FIG. 1, a part of the translucent cover 3 and the filter tube 6 is cut for convenience of understanding. In these figures, the z direction indicates the vertical direction, the axial direction of the light-transmitting cover 3 is the x direction, and the direction perpendicular to both the z direction and the x direction is the y direction.

  The support member 1 serves to support the LED light emitting unit 2 and to dissipate heat from the LED light emitting unit 2. Further, the support member 1 is accommodated in the translucent cover 3. In the present embodiment, the support member 1 includes a top plate portion 11 and a pair of side plate portions 12. The top plate portion 11 has a long rectangular shape extending in the x direction, and the LED light emitting portion 2 is attached thereto. The pair of side plate portions 12 extends from both ends in the y direction, which is the width direction of the top plate portion 11, upward in the z direction, which is the opposite side to the LED light emitting portion 2. With such a configuration, the support member 1 is substantially U-shaped when viewed in the x direction. The support member 1 is made of a metal such as Al, and is formed by so-called extrusion molding.

  Each side plate portion 12 is provided with an outer rib 13 protruding outward in the width direction of the top plate portion 11. The outer rib 13 extends long in the x direction, and is formed over the entire length of the support member 1 in the present embodiment.

  The LED light emitting unit 2 is a light source of the LED illuminating lamp A1, and emits white light such as a daylight color in the present embodiment. The LED light emitting unit 2 of the present embodiment includes a plurality of LED modules 20 and a substrate 27. The board 27 is a printed wiring board made of glass epoxy resin, for example, and has a long rectangular shape that extends long in the x direction.

  The plurality of LED modules 20 are arranged in a line along the x direction and are mounted on the substrate 27. In addition, the structure by which the some LED module 20 was arrange | positioned at multiple rows may be sufficient. In the present embodiment, the main emission direction of the plurality of LED modules 20 coincides with the lower side in the z direction. The main emission direction refers to a substantially central direction of light emitted from the LED module 20. The light from the LED module 20 is emitted so as to spread around the main emission direction. However, the luminance in the main emission direction does not have to be maximum.

  FIG. 7 shows an example of the LED module 20. The LED module 20 shown in FIG. 1 includes an LED chip 21, a pair of leads 22, a case 23, and a sealing resin 24. The LED chip 21 is made of, for example, a GaN-based semiconductor and emits blue light, for example. The sealing resin 24 covers the LED chip 21 and is made of, for example, a material in which a fluorescent material is mixed into a transparent resin. This fluorescent material emits yellow light when excited by blue light from the LED chip 21. The type and concentration of the fluorescent material are adjusted so that a white color such as a neutral white color is obtained by mixing the blue light from the LED chip 21 and the yellow light from the fluorescent material. The pair of leads 22 supports the LED chip 21 and serves as a conduction path to the LED chip 21 and is made of, for example, a Cu alloy. The case 23 is made of white resin, for example, and has a frame shape surrounding the LED chip 21. The inner surface of the case 23 functions as a reflector that emits light by reflecting light from the LED chip 21.

  The translucent cover 3 transmits the light from the LED light emitting unit 2 while diffusing, and accommodates the support member 1, the LED light emitting unit 2, and the power source unit 4 in the present embodiment. The translucent cover 3 has a cylindrical shape whose axial direction is the x direction. The translucent cover 3 is made of, for example, a material in which a milky white diffusion material is mixed in a polycarbonate resin. Further, in the present embodiment, the thermal expansion coefficient of the translucent cover 3 is larger than the thermal expansion coefficient of the support member 1. In addition, the translucent cover 3 should just be what permeate | transmits the light from the LED light emission part 2, and may consist of a transparent material which does not fulfill | perform a remarkable diffusion function. The thickness of the translucent cover 3 is, for example, 0.8 to 2.0 mm. The translucent cover 3 is formed with a pair of inner ribs 32. Each inward rib 32 protrudes inward in the y direction, and engages with the outer rib 13 of the support member 1.

  The power supply unit 4 functions to convert, for example, commercial 100V AC power into DC power suitable for lighting the plurality of LED modules 20 of the LED light emitting unit 2. The power supply unit 4 is accommodated in a support member 1 having a U-shape when viewed in the x direction. The power supply unit 4 includes a power supply board 41 and a plurality of electronic components 42. The power supply board 41 is a printed wiring board made of glass epoxy resin, for example. The plurality of electronic components 42 are, for example, a control IC, a diode, a transformer, a capacitor, and a resistor. The power supply unit 4 and the LED light emitting unit 2 are appropriately connected by a cable (not shown) or the like.

  The pair of bases 5 are located at both ends in the x direction of the support member 1, are parts that are attached to the power supply unit 82 and receive power from the power supply unit 82. Each base 5 includes a case 51 and a pair of pins 52. 3 to 6 show one of the caps 5, but in the present embodiment, the pair of caps 5 have the same configuration.

  The case 51 is made of, for example, resin and defines the outer shape of the base 5. The case 51 has a cylindrical portion 51a, an emission side protrusion 51c, and a counter-emission side protrusion 51d.

  The cylindrical portion 51a is a cylindrical portion whose axial direction is the x direction. The cylindrical portion 51 a accommodates the end portion 31 of the translucent cover 3 and the peripheral portion of the end portion 31. The tip portion of the cylindrical portion 51a is configured as a tapered portion 51b. The taper portion 51b is a portion whose diameter decreases in the x direction from the outside toward the inside.

  The emission-side protrusion 51 c is provided on the side where the LED light emitting unit 2 is disposed with respect to the support member 1 in the z direction corresponding to the radial direction of the translucent cover 3. The emission-side protrusion 51c sandwiches the light-transmitting cover 3 together with the cylindrical portion 51a in the radial direction (z direction) of the light-transmitting cover 3. The emission-side protrusion 51c has an arc shape when viewed in the x direction.

  As shown in FIG. 3, the cylindrical portion 51 a extends inward in the x direction, which is the axial direction of the translucent cover 3, from the emission side protrusion 51 c. As shown in FIG. 5, in the present embodiment, the distance between the cylindrical portion 51 a and the emission-side protrusion 51 c in the z direction, which is the radial direction of the translucent cover 3, is larger than the thickness of the translucent cover 3. is there. Thereby, a gap Gr exists between the cylindrical portion 51 a and the emission-side protrusion 51 c and the translucent cover 3. The gap Gr may exist only between the cylindrical portion 51 a and the translucent cover 3 and between the emission-side protrusion 51 c and the translucent cover 3. Due to the existence of the gap Gr, the base 5 and the translucent cover 3 can be moved relative to each other in the x direction. Further, as long as the base 5 and the translucent cover 3 can be moved relative to each other, the cylindrical portion 51 a and the emission-side protrusion 51 c may be in contact with the translucent cover 3.

  The non-emission side protrusion 51d is located on the opposite side of the LED light emitting unit 2 with the support member 1 interposed therebetween in the z direction, which is the radial direction of the translucent cover 3. As shown in FIG. 3, the non-emission-side protrusion 51d extends inward in the x direction, which is the axial direction of the light-transmitting cover 3, from the cylindrical portion 51a. The non-emission side protrusion 51d has a translucent cover holding part 51e and a pair of support member holding parts 51f.

  The translucent cover holding part 51e sandwiches the translucent cover 3 together with the cylindrical part 51a in the z direction, which is the radial direction of the translucent cover 3. As shown in FIG. 4, the distance between the cylindrical portion 51 a and the translucent cover holding portion 51 e in the z direction, which is the radial direction of the translucent cover 3, is larger than the thickness of the translucent cover 3. Thereby, a gap Gr exists between the cylindrical portion 51 a and the translucent cover holding portion 51 e and the translucent cover 3. The gap Gr may exist only between the cylindrical portion 51a and the translucent cover 3 and between the translucent cover holding portion 51e and the translucent cover 3. Due to the existence of the gap Gr, the base 5 and the translucent cover 3 can be moved relative to each other in the x direction. Further, as long as the base 5 and the translucent cover 3 can move relative to each other, the cylindrical portion 51a and the translucent cover holding portion 51e and the translucent cover 3 may be in contact with each other. The translucent cover holding part 51 e has an arc shape when viewed in the x direction, which is the axial direction of the translucent cover 3.

  The pair of support member holding portions 51f are portions to which the support member 1 is fixed. In this embodiment, as shown in FIG. 6, the pair of support member holding portions 51f extends downward from both ends of the translucent cover holding portion 51e. . The pair of support member holding portions 51f are fixed to the pair of side plate portions 12 separately. Each support member holding portion 51 f is fixed to an inner portion of each side plate portion 12 in the y direction, which is the radial direction of the translucent cover 3. The support member holding part 51f of the case 51 and the side plate part 12 of the support member 1 are fixed by, for example, adhesion.

  As shown in FIGS. 4 and 5, there is a gap Ga between the end portion 31 of the translucent cover 3 and the case 51 of the base 5 in the x direction. This is because the distance between the portions 51 of the pair of caps 5 facing the end portion 31 of the translucent cover 3 in the x direction is larger than the length of the translucent cover 3 in the x direction. This is realized by fixing 5 to the support member 1.

  The pair of pins 52 is supported by the case 51 and protrudes outward in the x direction. The pin 52 is inserted into the power supply unit 82 and constitutes a part of a conduction path between the power supply unit 82 and the power supply unit 4.

  The filter tube 6 covers at least part of the translucent cover 3 and is in close contact with at least part of the translucent cover 3. In the present embodiment, the filter tube 6 covers all of the portions of the translucent cover 3 exposed from the pair of caps 5. The filter tube 6 is in close contact with all the portions of the translucent cover 3 exposed from the pair of caps 5. Such a filter tube 6 is brought into close contact with the translucent cover 3 by being thermally contracted.

  As shown in FIGS. 4 and 5, in the present embodiment, the translucent cover 3 covers a part of the cylindrical portion 51 a of the case 51 of the base 5. More specifically, the translucent cover 3 covers all the tapered portions 51b.

  The translucent cover 3 attenuates a part of the wavelength range of the light emitted from the LED light emitting unit 2 and transmitted through the translucent cover 3. For example, in a yellow room illumination application for performing a photolithography process using a photosensitive material in a clean room, it is necessary to shield ultraviolet rays. In the case of such an application, the light-transmitting cover 3 is one that significantly attenuates light in the wavelength region of 570 nm or less and shields it almost. Desirably, the translucent cover 3 significantly attenuates light in a wavelength region of 500 nm or less. The lower limit of the wavelength range that the translucent cover 3 attenuates can be set to 370 nm, for example, but this may be set according to the wavelength range in which the assumed photosensitive substance is transformed. The translucent cover 3 is made of a heat-shrinkable material, for example, a polyester resin. Further, the LED illumination lamp A1 has a shape similar to a straight tube fluorescent lamp that extends long in the x direction. For this reason, the translucent cover 3 is uniaxially stretched significantly in the radial direction (y direction and z direction) of the translucent cover 3 and hardly thermally contracted in the x direction, which is the axial direction of the translucent cover 3. It is preferably formed using a heat-shrinkable film.

  Next, an example of the manufacturing method of the LED lighting lamp A1 will be described below with reference to FIGS.

  First, as shown in FIG. 8, the LED light emitting unit 2 is formed and bonded to the support member 1. Then, the support member 1 and the LED light emitting unit 2 are inserted into the translucent cover 3. Further, the power supply unit 4 is inserted between the support member 1 and the translucent cover 3. Prior to the insertion of the power supply unit 4, the wiring work with the LED light emitting unit 2 is completed in advance, and the support member 1, the LED light emitting unit 2, and the power supply unit 4 are collectively inserted into the translucent cover 3. Also good. Or after inserting the power supply part 4, you may connect the LED light emission part 2 and the power supply part 4 using a connector (not shown), for example.

  Next, as shown in FIG. 9, the base 5 is joined to the support member 1. As described above, an adhesive is applied to either or both of the pair of support member holding portions 51f of the case 51 of the base 5 and the pair of side plate portions 12 of the support member 1, and the base 5 and the support member 1 are attached. Join. At this time, the portion near the end 31 of the translucent cover 3 is accommodated in the cylindrical portion 51 a of the case 51 of the base 5. Further, the end portion 31 of the translucent cover 3 is inserted between the cylindrical portion 51a and the emission-side projection 51c and between the cylindrical portion 51a and the translucent cover holding portion 51e of the counter-emission-side projection 51d.

  Next, as shown in FIG. 10, the filter tube 6 before being thermally contracted is loaded into the translucent cover 3. The filter tube 6 in this state has a size that can accommodate the translucent cover 3 with a margin. Then, for example, an integrated product of the support member 1 in which the filter tube 6 is loaded in the heating furnace, the LED light emitting unit 2, the translucent cover 3, the power source unit 4 and the pair of bases 5 is placed. And the temperature in the said heating furnace is maintained at 100 degreeC, for example, and this state is maintained for 5 minutes. As a result, the filter tube 6 is thermally contracted and is in close contact with the light-transmitting cover 3. Thereby, LED lighting A1 is obtained.

  Next, the operation of the LED illumination lamp A1 will be described.

  According to this embodiment, as shown in FIGS. 4 and 5, there is a gap Ga between the end portion 31 of the translucent cover 3 and the case 51. Since the filter tube 6 is mounted by heat shrinkage, it is assumed that the light-transmitting cover 3 expands in the x direction by heating. Even if this expansion occurs, it is possible to avoid the end 31 of the translucent cover 3 from coming into contact with the base 5 due to the presence of the gap Ga. When the end portion 31 of the translucent cover 3 and the base 5 come into contact with each other, for example, the translucent cover 3 may be unjustly deformed or damaged. According to LED lighting A1, there is little such a fear and the filter tube 6 can be mounted | worn appropriately. Therefore, the LED illuminating lamp A1 can attenuate light in a specific wavelength region and appropriately emit light in other wavelength regions.

  The pair of caps 5 is fixed to the support member 1 and is movable relative to the translucent cover 3 in the x direction. For this reason, even if the translucent cover 3 is thermally expanded, it is possible to avoid the translucent cover 3 and the pair of bases 5 from contacting each other as described above, and the distance between the pair of bases 5 is appropriately set by the support member 1. It is possible to set. Since the pair of cases 51 are, for example, loaded in the power supply unit 82, it is preferable that the distance between the pair of bases 5 is set to an appropriate size.

  The thermal expansion coefficient of the translucent cover 3 is larger than the thermal expansion coefficient of the support member 1. For this reason, when the filter tube 6 is thermally contracted, it is assumed that the translucent cover 3 expands more greatly than the support member 1. Even if such a difference in expansion occurs, the gap Ga is provided between the translucent cover 3 and the pair of caps 5, whereby deformation and breakage of the translucent cover 3 can be avoided. In addition, when using the heating furnace mentioned above when heat-shrinking the filter tube 6, the translucent cover 3 outside the support member 1 in the furnace is heated in advance. For this reason, even if the thermal expansion coefficient of the translucent cover 3 and the support member 1 is equal, or even if the thermal expansion coefficient of the translucent cover 3 is smaller than the thermal expansion coefficient of the support member 1, It is assumed that the translucent cover 3 expands more than the support member 1 due to a temperature difference with the optical cover 3. Even in such a case, deformation and breakage of the translucent cover 3 can be avoided by the presence of the gap Ga.

  When the filter tube 6 attenuates light in a wavelength region of 570 nm or less, the LED illumination lamp A1 can be used for so-called yellow room illumination. The LED module 20 of the LED light emitting unit 2 includes an LED chip 21 that emits blue light and a sealing resin 24 that includes a fluorescent material that emits yellow light. Even if part of the light from the LED chip 21 is emitted from the LED light emitting unit 2 as it is, the blue light can be appropriately shielded by the filter tube 6.

  Since the filter tube 6 covers all of the translucent cover 3, only light in a desired wavelength region can be emitted from the LED illumination lamp A1. Since the filter tube 6 is in close contact with the translucent cover 3, it is possible to prevent light from being reflected or diffused between the filter tube 6 and the translucent cover 3.

  Since the case 51 is provided with the tapered portion 51b, it is possible to prevent an excessive step from being generated at the boundary between the filter tube 6 and the case 51, and the filter tube 6 is unduly distorted. Can be prevented.

  Since the gap Gr is provided between the cylindrical portion 51a and the emission-side projection 51c and the translucent cover 3, the translucent cover 3 and the base 5 can be smoothly moved relative to each other. In addition, since the gap Gr is provided between the cylindrical portion 51a and the translucent cover holding portion 51e and the translucent cover 3, the translucent cover 3 and the base 5 can be smoothly moved relative to each other.

  Since the cylindrical portion 51a extends inward in the x direction from the emission side protrusion 51c, it is possible to prevent the emission side protrusion 51c from appearing in the appearance of the LED illumination lamp A1. Moreover, when the LED light emission part 2 light-emits, it can prevent that the shadow of the output side protrusion 51c generate | occur | produces. On the other hand, the translucent side projection 51d extends inward in the x direction from the cylindrical portion 51a, so that the translucent cover 3 can be held more reliably. Since the non-emission side protrusion 51d is provided on the side opposite to the side from which the LED light emitting unit 2 emits light, there is almost no risk of appearing in a conspicuous manner in the appearance of the LED illumination lamp A1 or generating a shadow. Absent.

  By joining the pair of support member holding portions 51f of the base 5 and the pair of side plate portions 12 of the support member 1, the support member 1 and the pair of bases 5 can be more reliably fixed.

  The outer ribs 13 are provided on the support member 1, the inner ribs 32 are provided on the translucent cover 3, and these are engaged to appropriately determine the circumferential positions of the support member 1 and the translucent cover 3. be able to. Since both the outer rib 13 and the inner rib 32 extend in the x direction, the support member 1 can be appropriately inserted into the translucent cover 3 so as to slide in the x direction.

  11 to 14 show another embodiment of the present invention. In these drawings, the same or similar elements as those in the above embodiment are denoted by the same reference numerals as those in the above embodiment.

  11 and 12 show an LED illuminating lamp according to the second embodiment of the present invention. The LED illumination lamp A2 of the present embodiment is different from the above-described embodiment in the area of the case 51 of the base 5 covered with the filter tube 6.

  In the present embodiment, the filter tube 6 covers a portion of the case 51 near the tip of the tapered portion 51b, and exposes a portion near the root of the tapered portion 51b. However, the tip of the taper portion 51b is covered with the filter tube 6 over the entire circumference. For this reason, it is the same as that of LED illuminating lamp A1 mentioned above that the part exposed from a pair of caps 5 among the translucent covers 3 is covered with the filter tube 6. FIG.

  Also in such an embodiment, the filter tube 6 can be appropriately mounted. Therefore, the LED illuminating lamp A2 can attenuate light in a specific wavelength range and appropriately emit light in other wavelength ranges.

  FIG. 13 shows an LED illuminating lamp according to a third embodiment of the present invention. A3 of this embodiment differs from the above-described embodiment in the area of the case 51 of the base 5 covered with the filter tube 6.

  In the present embodiment, the filter tube 6 covers all of the cylindrical portion 51 a of the case 51. Further, the filter tube 6 covers a part of the surface of the case 51 that faces outward in the x direction. However, the filter tube 6 exposes a pair of pins 52.

  FIG. 14 shows an example of a manufacturing method of the LED lighting A3. As shown in the figure, in the present embodiment, the length of the filter tube 6 in the x direction is longer than the distance between the surfaces of the pair of bases 5 facing the x direction before heat shrinking. By using such a filter tube 6, almost the entire case 51 is covered with the filter tube 6 after the heat shrinkage.

  Also in such an embodiment, the filter tube 6 can be appropriately mounted. Therefore, the LED illumination lamp A3 can attenuate light in a specific wavelength region and appropriately emit light in other wavelength regions.

  The LED illumination lamp and the LED illumination lamp manufacturing method according to the present invention are not limited to the above-described embodiments. The specific configuration of the LED illumination lamp and the LED illumination lamp manufacturing method according to the present invention can be varied in design in various ways.

A1 to A3 LED lamp 1 Support member 11 Top plate portion 12 Side plate portion 13 Outer rib 2 LED light emitting portion 20 LED module 21 LED chip 22 Lead 23 Case 24 Sealing resin 27 Substrate 3 Translucent cover 31 End portion 32 Inner side Rib 4 Power supply part 41 Power supply board 42 Electronic component 5 Base 51 Case 51a Cylindrical part 51b Taper part 51c Emission side protrusion 51d Anti-emission side protrusion 51e Translucent cover holding part 51f Support member holding part 52 Pin 6 Filter tube 82 Power supply part 81 Ceiling Ga gap Gr gap

Claims (32)

An LED light emitting unit comprising a plurality of LED chips;
An elongated support member for supporting the LED light emitting unit;
A tubular translucent cover that houses the LED light emitting unit and the support member and transmits light from the LED light emitting unit;
An LED illuminating lamp comprising a pair of caps located at both ends of the support member,
Further comprising a filter tube that attenuates light in a part of the wavelength region of the light transmitted through the translucent cover, and is in close contact with at least a portion of the translucent cover by thermal contraction;
The LED illuminating lamp, wherein a gap exists between both ends of the translucent cover and at least one of the pair of caps in the axial direction of the translucent cover.   2. The LED illumination lamp according to claim 1, wherein the pair of bases is fixed to the support member and is movable relative to the translucent cover.   The LED illumination lamp according to claim 1 or 2, wherein a thermal expansion coefficient of the translucent cover is larger than a thermal expansion coefficient of the support member.   The LED light according to any one of claims 1 to 3, wherein the translucent cover has a cylindrical shape.   The LED light according to claim 1, wherein the translucent cover diffuses light from the LED light emitting unit.   The LED illumination lamp according to any one of claims 1 to 5, wherein a wavelength region attenuated by the filter tube is 380 nm to 570 nm.   The LED filter lamp according to any one of claims 1 to 6, wherein the filter tube covers all of the portion of the translucent cover exposed from the base.   The LED filter lamp according to claim 7, wherein the filter tube is in close contact with all portions of the translucent cover exposed from the base.   The LED filter lamp according to claim 1, wherein the filter tube covers a part of each of the pair of caps.   10. The LED lamp according to claim 9, wherein the base has a taper portion whose size decreases as it goes from the outside toward the inside in the axial direction, and at least a portion is covered with the filter tube.   The LED filter lamp according to claim 1, wherein the filter tube is made of a polyester resin.   The LED lighting unit according to claim 1, wherein each of the LED light emitting units includes a plurality of LED modules each having the LED chip, a translucent resin that covers the LED chip, and a mounting terminal.   The LED illuminating lamp according to claim 12, wherein the translucent resin is mixed with a fluorescent material that emits light having a wavelength different from that of light from the LED chip when excited by light from the LED chip.   The LED illumination lamp according to claim 13, wherein light in a wavelength region emitted from the LED chip has a greater attenuation rate by the filter tube than light in a wavelength region emitted from the fluorescent material.   The LED lighting unit according to any one of claims 12 to 14, wherein the LED light emitting unit includes a substrate on which the plurality of LED modules are mounted.   The LED illumination lamp according to claim 15, wherein the substrate is fixed to the support member.   The LED illumination lamp according to claim 15 or 16, wherein the substrate has an elongated rectangular shape extending in the axial direction of the translucent cover. Each of the pair of caps has a cylindrical portion having the same axial direction as the translucent cover,
The LED illumination lamp according to any one of claims 1 to 17, wherein portions near both ends of the translucent cover are accommodated in the cylindrical portions of the pair of caps.   The base has an emission-side protrusion that sandwiches the light-transmitting cover together with the cylindrical portion in the radial direction of the light-transmitting cover on the side where the LED light-emitting portion is disposed with respect to the support member in the radial direction of the light-transmitting cover. The LED illuminating lamp according to claim 18, comprising:   The LED illumination lamp according to claim 19, wherein the cylindrical portion extends inward in the axial direction of the translucent cover from the emission-side protrusion.   The LED illumination lamp according to claim 19 or 20, wherein a distance between the cylindrical portion and the emission-side protrusion in a radial direction of the translucent cover is larger than a thickness of the translucent cover.   The LED illumination lamp according to any one of claims 19 to 21, wherein the emission-side protrusion has an arc shape when viewed in the axial direction of the translucent cover.   The LED lamp according to any one of claims 18 to 22, wherein the base has a non-emission-side protrusion located on the opposite side of the LED light emitting unit with a support member in a radial direction of the translucent cover interposed therebetween.   The LED illuminating lamp according to claim 23, wherein the opposite-projection-side protrusion has a light-transmitting cover holding portion that sandwiches the light-transmitting cover together with the cylindrical portion in a radial direction of the light-transmitting cover.   The LED illumination lamp according to claim 24, wherein a distance between the cylindrical portion and the translucent cover holding portion in a radial direction of the translucent cover is greater than a thickness of the translucent cover.   The LED illuminating lamp according to claim 24 or 25, wherein the translucent cover holding part has an arc shape when viewed in the axial direction of the translucent cover.   27. The LED illumination lamp according to any one of claims 23 to 26, wherein the non-emission side protrusion has a support member holding portion to which the support member is fixed. The support member has a top plate portion that supports the LED light emitting portion, and a pair of side plate portions that extend from both ends of the top plate portion to the opposite side of the LED light emitting portion,
28. The LED lamp according to claim 27, wherein the support member holding portion of the counter-projection side protrusion of the base is fixed to the pair of side plate portions.   The LED illumination lamp according to claim 28, wherein the support member holding portion is fixed to a radially inner portion of the translucent cover of the pair of side plate portions. Each side plate portion is provided with an outer rib protruding outward in the width direction of the top plate portion,
30. The LED according to claim 28 or 29, wherein the translucent cover is provided with an inner rib that protrudes inward in the width direction of the top plate portion and engages with the outer rib of the heat dissipation member. Lighting light.   The LED illuminating lamp according to any one of claims 23 to 30, wherein the anti-emission side protrusion extends inward in the axial direction of the translucent cover from the cylindrical portion. An LED light emitting unit having a plurality of LED chips is supported by a support member, and the support member is accommodated in a cylindrical light transmitting cover that transmits light from the LED light emitting unit, and the axial direction of the light transmitting cover Fixing a pair of caps to both ends of the support member so as to leave a gap between both ends of the translucent cover in
A filter tube that attenuates light in a part of the wavelength region of the light transmitted through the light-transmitting cover and has heat shrinkability is mounted on the light-transmitting cover so as to cover at least a part of the light-transmitting cover. Process,
Heating the filter tube so that the filter tube is in close contact with at least a part of the translucent cover; and
A method for manufacturing an LED illumination lamp, comprising:

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