JP2011044306A - Fluorescent lamp type illumination device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fluorescent lamp type illumination device in which the reduction of deformation generated by a temperature difference in a pipe caused by the self-heating of a light-emitting element is enabled, and a highly-densified large-current type light-emitting element can be mounted. <P>SOLUTION: The fluorescent lamp type illumination device 1 is equipped with a support substrate 50 arranged on the rear face of an LED substrate 40, and a light-transmitting tubular member 10 to house and support the support substrate 50. The interior of the light-transmitting tubular member 10 is partitioned by the support substrate 50. A first space 2 formed between the light-transmitting tubular member 10 and the support substrate 50 and a second space 3 formed between the light-transmitting tubular member 10 and the LED substrate 40 are set to have different volumes. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a fluorescent lamp type illumination device using a light emitting element.

  A light emitting element such as a light emitting diode (hereinafter referred to as “LED”) has been used as a light source of a lighting device. As an example of an illuminating device using this type of LED, for example, an LED illumination having a cylindrical shape compatible with the standard of existing fluorescent lamps and a heat radiating part that radiates heat generated from the LED to the outside There is an apparatus (for example, refer to Patent Document 1).

  The conventional LED illuminating device described in the above-mentioned patent document 1 has a mouthpiece that can be connected to a fluorescent lamp fixture at both ends, and has a cross-sectional shape in the gap of a circular cross-section polycarbonate tube having a gap in the longitudinal direction. The aluminum block is internally fitted and fixed. The portion of the aluminum block on the tube facing surface side is a substrate mounting portion of a printed circuit board on which a plurality of LEDs are mounted, and the portion on the opposite side of the aluminum block on the tube facing surface side is The heat radiating unit radiates heat from the LED and the printed circuit board to the outside of the polycarbonate tube.

JP 2009-105354 A

  However, in the conventional LED lighting device, since the aluminum block is in contact with the inner wall of the pipe, the heat generated from the LED is transmitted from the aluminum block to the pipe at the time of lighting, resulting in a temperature difference in the cross-sectional direction of the pipe. . Therefore, the pipe is warped or twisted due to uneven thermal expansion. In the structure of the conventional LED lighting device described above, warping and twisting increase as the amount of heat during lighting increases, and thus there is a limitation in increasing the density of LEDs and mounting large current type LEDs.

  Accordingly, an object of the present invention is to make it possible to reduce deformation caused by a temperature difference of a pipe due to self-heating of a light emitting element, and to increase the density of the light emitting element and to mount a large current type light emitting element. It is to provide a mold lighting device.

The object of the present invention can be achieved by each invention described in claims [1] to [5] of the present application.
[1] In order to achieve the above object, the fluorescent lamp illumination device of the present invention includes a plurality of light emitting elements, a substrate on which the plurality of light emitting elements are mounted in the longitudinal direction, and a metal disposed on the back surface of the substrate. A light transmissive tubular member that accommodates and supports the metal member, and the inside of the light transmissive tubular member is partitioned by the metal member, and the first space and the second space having different volumes. It is characterized by having.
[2] In the invention described in [1] above, the light transmissive tubular member has a pair of engagement receiving portions for inserting and supporting both end portions in the width direction of the metal member, and the pair of engagement members. The joint portion is characterized in that it is arranged at a position shifted from the center line of the light transmissive tubular member.
[3] In the invention described in [1] or [2] above, the pair of electrode terminals attached to both side ends in the longitudinal direction of the light transmissive tubular member and connected to the fluorescent lamp fixture are insulated. And first and second joint members that connect the light transmissive tubular member and the base, and each of the first and second joint members includes the first and second joint members, It has an annular filling recess for inserting and supporting both end portions in the longitudinal direction of the light transmissive tubular member, and the filling recess is filled with a filler.
[4] The invention according to any one of [1] to [3], further including a light direction conversion member that is provided on the substrate and converts a direction of light emitted from the light emitting element. It is characterized by becoming.
[5] In the invention described in [1] or [4], the light-emitting element is a light-emitting diode.

  According to the present invention, there is provided a fluorescent lamp illumination device that can prevent deformation due to temperature change due to self-heating of a light emitting element, and that can increase the number of light emitting elements, increase the amount of emitted light, and the like. Can be obtained effectively.

(A) is a top view which cuts and shows a part of fluorescent lamp type LED lamp which is 1st Embodiment based on this invention, (b) is one of the internal structures of a fluorescent lamp type LED lamp It is a top view which cuts and shows a part, (c) is a side view of a fluorescent lamp type LED lamp. It is a principal part cross-sectional enlarged view notched along the AA line of FIG.1 (c). (A) is the principal part cross-sectional enlarged view notched along the BB line of FIG. 2, (b) is for demonstrating the optical path in the principal part cross section shown to Fig.3 (a). FIG. (A) is a principal part cross-sectional enlarged view of the fluorescent lamp type LED lamp which is the 2nd Embodiment of this invention, (b) shows the optical path in the principal part cross section shown to Fig.4 (a). It is a figure for demonstrating.

  Preferred embodiments of the present invention will be specifically described below with reference to the accompanying drawings.

[First Embodiment]
(Whole structure of lighting device)
In FIG. 1A, reference numeral 1 indicating the whole schematically shows a configuration example of an LED illumination lamp which is a fluorescent lamp type illumination device. Since the LED illumination lamp 1 has the same structure and the same members on both sides in the longitudinal direction, only the structure and members on one side will be described in the first embodiment.

  As shown in FIG. 1A to FIG. 2, the appearance configuration of the LED illumination lamp 1 includes a cylindrical pipe member 10 and cap-shaped first and second caps that close both end openings in the longitudinal direction of the pipe member 10. It is comprised from the 2nd nozzle | cap | die 20,20, and the cylindrical 1st and 2nd joint members 30 and 30 which connect and fix the pipe member 10 and the nozzle | cap | die 20. Inside the pipe member 10, an LED substrate 40 on which the LEDs 41,..., 41, which are a plurality of light emitting elements, and a support substrate 50 on which the LED substrate 40 is mounted are housed in an airtight manner. The inside of the pipe member 10 is partitioned along the longitudinal direction by the support substrate 50, and forms the first space 2 and the second space 3 having different volumes.

(Configuration of pipe member)
The pipe member 10 of the LED illuminating lamp 1 according to the illustrated example is constituted by a light-transmitting straight tubular member made of, for example, acrylic resin or polycarbonate resin. The pipe member 10 is formed by extrusion molding according to the length dimension of the LED lighting lamp 1, and has substantially the same size, dimension, and outer shape as an existing straight tube fluorescent lamp. Examples of the length L of the LED lamp 1 include 580 mm, 630 mm, 830 mm, 1000 mm, and 1198 mm. The outer diameter φ1 of the pipe member 10 is, for example, about 29 mm, and the inner diameter φ2 is, for example, about 26.2 mm.

  As shown in FIG. 3A, a pair of recesses 11 and 11 are formed in the pipe member 10 as engagement receiving portions that protrude inward from the inner peripheral surface and extend in parallel along the longitudinal direction. Has been. The pair of recesses 11 is arranged at a position shifted from the cylindrical center line C of the pipe member 10 toward the side opposite to the irradiation direction. In the pair of recesses 11, the LED substrate 40, the insulating sheet 42, and the support substrate 50 are respectively inserted and supported at both ends in the width direction. According to the illustrated example, the LED substrate 40, the insulating sheet 42, and the support substrate 50 have a distance D3 from the center line C of the pipe member 10 of 4.5 mm, and a distance D4 from the center line C of the pipe member 10. Arranged in a space area of 7.5 mm.

  As shown in FIG. 3A, the recess 11 of the pipe member 10 is a rail-shaped uneven portion extending along the longitudinal direction of the inner peripheral surface, but is not limited thereto. As another example of the recess 11, for example, it may be a configuration that is recessed outward from the inner peripheral surface of the pipe member 10 and is recessed in a groove shape extending along the longitudinal direction of the inner peripheral surface. It is.

  As a material of the pipe member 10, a material having an appropriate reflectance and light diffusivity without impairing light transmittance is preferable. As an example of the pipe member 10, for example, a synthetic resin in which light diffusing agent fine particles such as calcium carbonate and titanium oxide are dispersed to impart light diffusibility, or a coating layer in which the light diffusing agent fine particles are applied to the surface of the synthetic resin is used. And those provided with light diffusibility by forming irregularities on the surface of the synthetic resin. The light that has passed through the pipe member 10 from the plurality of LEDs 41 is diffused and scattered in all directions by the pipe member 10, as shown in FIG. 3B, and the light is emitted almost uniformly from the arc surface of the pipe member 10. The

(Composition of base)
The material of the base 20 of the LED lighting lamp 1 is made of a material such as bakelite, aluminum, or aluminum alloy, for example. The base 20 supports a pair of power supply terminals (hereinafter referred to as terminal pins) 21 and 21 in an insulating manner. One end of the terminal pin 21 opposite to the protruding end is electrically connected to the plurality of LEDs 41 via lead wires 22 connected to the terminal pin 21.

(Composition of joint member)
The material of the joint member 30 of the LED lamp 1 is made of, for example, polybutylene terephthalate resin or polycarbonate. As shown in FIG. 2, the joint member 30 is formed in a stepped shape including a large-diameter pipe-side tube portion 31 and a small-diameter base-side tube portion 32. The pipe side cylinder part 31 is a pipe accommodating part, and the base side cylinder part 32 is a lead wire accommodating part. The pipe side cylinder portion 31 is fixed to the outer peripheral surface of the end portion of the pipe member 10 with an adhesive, and the base side cylinder portion 32 is fixed to the inner peripheral surface of the base 20 by an adhesive or caulking. As an example of the adhesive, for example, trade name Super X manufactured by Cemedine is mentioned.

  As shown in FIG. 2, the joint member 30 is partitioned by a partition wall 33 having a U-shaped cross section on an internal step surface formed between the large-diameter pipe-side cylinder portion 31 and the small-diameter base-side cylinder portion 32. ing. Between the outer peripheral surface of the partition wall 33 and the inner peripheral surface of the pipe side cylinder portion 31, an annular filling concave portion 34 having an inner step surface as a bottom surface is formed.

  As shown in FIG. 2, an inverted L-shaped mounting bracket 36 is fastened and fixed to the partition wall 33 of the joint member 30 by screws 37. Both ends in the longitudinal direction of the support substrate 50 inserted and supported in the recess 11 of the pipe member 10 are fastened and fixed to the free end of the mounting bracket 36 by screws 38.

  The filling recess 34 of the joint member 30 is filled with a filler 35 having elasticity. As a material of the filler 35, for example, a material that is cured by heating is suitable, and a material that can be waterproofed by heating to such an extent that insulation, water resistance, and flexibility are not reduced is selected. In the first embodiment, silicon resin is used. As an example, there is a trade name TSE3070 (two-component) manufactured by Momentive Performance Material Japan. Due to the presence of the filler 35, the waterproof property between the pipe member 10 and the joint member 30 is enhanced, and the expansion by thermal expansion in the longitudinal direction of the pipe member 10 follows the difference in expansion and contraction with the support substrate 50. Is absorbed.

(Configuration of support substrate)
As shown in FIGS. 2 and 3A, the support substrate 50 of the LED lighting lamp 1 is made of a metal plate extending in the longitudinal direction of the pipe member 10. At both ends in the width direction of the support substrate 50, an edge engagement surface 51 that engages with the opening end surface of the recess 11 of the pipe member 10 and an edge contact surface 52 that contacts the inner surface of the recess 11 are longitudinal. The step part shape formed along is formed. On the back surface of the support substrate 50 opposite to the LED substrate mounting surface, a pair of reinforcing ribs 53, 53 extending in the longitudinal direction are projected. As the support substrate 50, for example, a substrate having a width of about 18 mm and a thickness of about 2 mm is used.

  As the material of the support substrate 50, it is preferable to use a metal material having excellent thermal conductivity such as iron, aluminum, aluminum alloy, copper, copper alloy, and the like. By forming the support substrate 50 from a material having good thermal conductivity, it has a function as a heat dissipation member. Heat from the LED 41 is transferred to the support substrate 50 via the LED substrate 40 and the insulating sheet 42, and accumulation of heat in the LED 41 and its peripheral portion can be prevented. Even if a difference in expansion / contraction occurs between the pipe member 10 and the support substrate 50 due to the temperature change, both end portions in the longitudinal direction of the pipe member 10 are filled in the filling recesses 34 of the joint member 30. Since it is attached to be stretchable via 35, it is possible to suppress a change in the relative position between the pipe member 10 and the support substrate 50.

(Configuration of LED board)
2 and 3A, the LED board 40 extending in the longitudinal direction of the pipe member 10 via the insulating sheet 42 is fastened and fixed to the support board 50 by screws 43. The LED substrate 40, the insulating sheet 42, and the support substrate 50 are unitized. The material of the LED substrate 40 is made of, for example, a glass base material (for example, FR-4) or an epoxy / polyester composite base material (for example, CEM-3).

  On the LED board 40, a wiring pattern (not shown) for mounting an LED module in which a plurality of LEDs 41,..., 41 are connected in series is formed. A mounting component 44 made of, for example, a fuse, a capacitor, or an inductance is mounted on the opposite end of the LED substrate 40 on the base side. A plurality of LEDs 41 mounted in series on the LED substrate 40 are electrically connected via these mounting components 44.

  The number of LEDs 41 mounted on the LED substrate 40 is set in consideration of necessary brightness, lighting effect, and the like. The number of LEDs 41 arranged is not limited to the illustrated example, and it is needless to say that the number of LEDs 41 arranged can be arbitrarily set. In the illustrated example, the configuration in which a plurality of LEDs 41 are mounted linearly with a predetermined interval on one LED substrate 40 is illustrated, but is not specified. For example, the LED substrate 40 may have a configuration in which two or more LED substrates 40 are connected in series, or may have a configuration in which a plurality of LEDs 41 are connected in parallel.

  The LED 41 may be, for example, a chip type LED with a wide viewing angle, or an LED having three types of red LED, green LED, and blue LED that emit different color lights. As another example of the LED 41, for example, a single color light of red light, green light, or blue light is mixed with two types of single color light, or three types of single color light is mixed. It is possible to use LEDs configured to be able to emit combined white light.

  As shown in FIG. 3A, the internal space of the pipe member 10 in the LED illuminating lamp 1 configured as described above is the irradiation direction of the light beam with the LED substrate 40, the insulating sheet 42, and the support substrate 50 interposed therebetween. The heat-radiating side space (first space) 2 formed between the non-irradiated surface and the support substrate 50 opposite to each other, and the irradiation surface and the support substrate 50 formed as the light irradiation direction are formed. It is partitioned into an irradiation side space (second space) 3. The heat radiation side space 2 and the irradiation side space 3 are set so that the temperature difference between the irradiation surface side and the heat radiation surface side of the pipe member 10 is small.

  As shown in FIG. 3A, the heat radiation side space 2 is a space having a smaller volume than the irradiation side space 3, and heat transfer to the non-irradiation surface of the pipe member 10 is heat to the irradiation surface. Bigger than transmission. From this, by increasing the heat radiation side space 2 to such an extent that the irradiation surface of the pipe member 10 does not become too narrow and reducing the amount of heat transferred to the non-irradiation surface, the emissivity can be lowered. The rise of the temperature on the non-irradiated surface side is suppressed.

  The space ratio between the heat radiation side space 2 and the irradiation side space 3 is set to be smaller than 1: 1. A space ratio of 1: 1 or more is not preferable because the irradiation surface of the pipe member 10 becomes too narrow. The temperature difference between the irradiation surface side and the heat radiation surface side of the pipe member 10 is determined by, for example, the temperature of the LED 41, the heat resistance of the heat radiation side space 2, and the like in addition to the thermal conductivity and length of the support substrate 50. By setting the space ratio between the heat radiation side space 2 and the irradiation side space 3 so that the temperature difference between the irradiation surface side and the non-irradiation surface side of 10 is kept small, The pipe member 10 has a small amount of deformation such as warping or twisting, and a wide irradiation range can be secured without causing a large difference in elongation due to a temperature difference from the side.

  The space ratio between the heat radiation side space 2 and the irradiation side space 3 is not particularly limited, but is preferably about 1: 3, 1: 5, 1: 7, for example. As shown in FIG. 3A, for example, when the inner diameter φ2 of the pipe member 10 is about 26.2 mm, the maximum thickness D1 of the air layer in the heat radiation side space 2 is 0 mm <D1 <13.1 mm. Set within the range. The maximum thickness D2 of the air layer in one irradiation side space 3 is set within the range of 13.1 mm <D2 <26.2 mm. In the illustrated example, the space ratio between the heat radiation side space 2 and the irradiation side space 3 is set to about 1: 5. By adjusting the thickness D1, D2 of the air layer, the temperature difference between the irradiation surface side and the heat radiation surface side of the pipe member 10 can be controlled.

  Table 1 shows an example of a temperature difference between the irradiation surface side and the non-irradiation surface side of the pipe member 10 with respect to the space ratio between the heat radiation side space 2 and the irradiation side space 3.

  It is preferable to set the space ratio between the heat radiation side space 2 and the irradiation side space 3 to 1: 5, because the pipe member 10 has a small amount of deformation such as warping and twisting, and a wide irradiation range can be secured.

(Effects of the first embodiment)
According to the LED illuminating lamp 1 according to the first embodiment, the following effects can be obtained.
(1) It becomes possible to prevent deformation of the pipe member 10 caused by a temperature change due to self-heating of the light emitting element, and it is possible to increase the number of LEDs 41 and increase the light emission amount.
(2) By changing the ratio of the heat radiation side space 2 and the irradiation side space 3, the warp direction and the warp amount can be controlled. Therefore, it becomes possible to maintain the pipe member 10 straight in the direction opposite to the direction in which the lighting device is deformed due to its own weight or due to its own weight.
(3) By forming the LED irradiation surface of the LED lighting lamp 1 into a pipe shape by extrusion molding, it is only necessary to provide a waterproof structure or a drip-proof structure only at both ends of the pipe shape.
(4) Since the pipe member 10 which becomes the LED irradiation surface of the LED lighting lamp 1 can be formed by extrusion molding, the LED lighting lamp 1 can be easily and inexpensively manufactured according to the length of the LED lighting lamp 1 required. Will be able to.
(5) It is possible to reduce member costs and material costs without complicating or increasing the size of the mold device for molding the pipe member, and the molding processing cost including the mold cost can be greatly reduced. Become.

[Second Embodiment]
Referring to FIGS. 4A and 4B, these drawings schematically show the internal structure of the fluorescent lamp type LED lamp according to the second embodiment. In the first embodiment, the light diffusion type LED illuminating lamp is exemplified. However, in the second embodiment, the first type of LED illuminating lamp is exemplified in the light of the first type. This is different from the embodiment. In addition, the same member name and code | symbol are attached | subjected to the member substantially the same as the said 1st Embodiment. Therefore, a detailed description of substantially the same members as those in the first embodiment is omitted.

  4 (a) and 4 (b), reference numeral 60 denotes a light direction changing member that converts a light beam emitted from the LED 41. The light direction changing member 60 is formed, for example, by injection molding a PMMA (polymethyl methacrylate) resin. The material of the light redirecting member 60 is not limited to PMMA resin, and for example, transparent resin such as polycarbonate, transparent glass, or various colored transparent materials can be used.

  As shown in FIGS. 4A and 4B, the light direction changing member 60 includes a first emitting portion 61 that emits a central light beam emitted from the central portion of the LED 41 as first light, and the LED 41. And a second light emitting portion 62 for emitting a peripheral light beam at the periphery of the emitted central light beam as second light. The form of the light direction changing member 60 is not limited to the illustrated example, but is formed in a funnel shape that gradually expands in the emission direction. As another form of the light direction changing member 60, for example, the irradiation surface of the light direction changing member 60 may have an elliptical shape centered on the optical axis.

  As shown in FIGS. 4A and 4B, the first emitting portion 61 of the light direction changing member 60 is disposed at a portion corresponding to the LED 41 mounted on the LED substrate 40. The first emitting portion 61 has a circular recess 63 that opens to the opposite side to the emitting side. The bottom surface of the concave portion 63 includes a first incident surface 64 having a convex curved shape at the center of the truncated conical portion bulged on the opposite side to the outgoing side, and a convex curved shape bulged on the outgoing side. And a first emission surface 65 having the shape.

  As shown in FIGS. 4A and 4B, the first incident surface 64 is a first refractive surface on which the central light flux from the LED 41 is refracted and incident. One of the first exit surfaces 65 is a second refracting surface that refracts and emits the central light beam that is refracted and incident from the first entrance surface 64. By setting the curvature shapes of the first and second bent surfaces, the emission direction of the central light beam from the LED 41 can be adjusted.

  On the other hand, as shown in FIGS. 4A and 4B, the second exit portion 62 of the light redirecting member 60 is a second entrance having a concave curved surface shape on the side surface portion of the recess 63 of the first exit portion 61. A surface 66, a reflecting surface 67 having a convex curved surface shape on the outer surface of the light direction changing member 60, and a second light emitting surface 68 having a step shape in a concave portion opened to the light emitting side of the light direction changing member 60. Yes. The second incident surface 66 is incident on the peripheral luminous flux emitted from the LED 41 via the side surface portion of the concave portion 63 of the first emitting portion 61. The reflecting surface 67 totally reflects the peripheral light beam emitted from the second incident surface 66 in the optical axis direction. The second emission surface 68 emits the peripheral light beam totally reflected by the reflection surface 67. The form of the reflecting surface 67 may be a part of a curved shape such as a rotating quadratic curved surface, a rotating paraboloid, or a rotating hyperboloid.

  As shown in FIGS. 4 (a) and 4 (b), the second exit surface 68 of the light direction changing member 60 includes a plane portion 68a,..., 68a and a wall surface portion 68b,. It is formed in a staircase shape consisting of The flat portion 68a has an annular shape that gradually expands in the emission direction around the optical axis, and is formed with the same width. One wall surface portion 68b has an annular shape that gradually expands in the emission direction with the optical axis as the center, and is formed with a gradually decreasing thickness in the emission direction.

  The number of steps on the second exit surface 68 is not limited to the illustrated example. In the illustrated example, the thickness of the light redirecting member 60 is set so thin that the rigidity of the light redirecting member 10 is reduced and the optical characteristics of the second exit surface 68 are not unstable. Thereby, generation | occurrence | production of the sink mark of a resin at the time of injection molding, a void, etc. can be suppressed, and the product excellent in smoothness and external appearance design property can be obtained. In addition, the weight and cost of the product can be reduced.

(Effect of the second embodiment)
According to the LED illuminating lamp 1 according to the second embodiment, in addition to the effects of the first embodiment, the following effects can be obtained.
(1) The center light beam and the peripheral light beam from the LED 41 can be accurately emitted.
(2) Since the central light beam and the peripheral light beam emitted from the LED 41 can be converted and emitted, all the light beams from the LED 41 are optically the same regardless of the distance from the LED 41 to the object to be illuminated. It becomes possible to emit efficiently toward the surface of the object to be illuminated with the power of.
(3) Since the thickness of the light redirecting member 60 can be set so thin as not to deteriorate the optical characteristics, rigidity, aesthetics, etc., it is possible to suppress the occurrence of resin sink marks and voids during injection molding. In addition, the weight of the product and cost reduction can be achieved.

  As is clear from the above description, the present invention is not limited to the above embodiments and illustrated examples, and various design changes can be made within the scope described in each claim. The present invention can be effectively used for various lighting devices such as street lights, road lights, crime prevention lights, parking lot lights, floodlights, and spotlights.

DESCRIPTION OF SYMBOLS 1 LED illuminating lamp 2 1st space 3 2nd space 10 Pipe member 11,63 Recess 20 Base 21 Terminal pin 22 Lead wire 30 Joint member 31 Pipe side cylinder part 32 Base side cylinder part 33 Partition 34 Filling recessed part 35 Filling material 36 Mounting bracket 37, 38, 43 Screw 40 LED board 41 LED
42 Insulating sheet 44 Mounting component 50 Support substrate 51 Edge engaging surface 52 Edge contact surface 53 Reinforcing rib 60 Light direction changing members 61 and 62 Light emitting portions 64 and 66 Light incident surfaces 65 and 68 Light emitting surface 67 Reflecting surface 68a Flat portion 68b wall surface

Claims (5)

A plurality of light emitting elements;
A substrate on which the plurality of light emitting elements are mounted in the longitudinal direction;
A metal member disposed on the back surface of the substrate;
A light transmissive tubular member that accommodates and supports the metal member;
An interior of the light transmissive tubular member is partitioned by the metal member, and has a first space and a second space having different volumes, and a fluorescent lamp type lighting device. A pair of engagement receiving portions for inserting and supporting both end portions in the width direction of the metal member inside the light transmissive tubular member;
3. The fluorescent lamp type illumination device according to claim 1, wherein the pair of engagement receiving portions are arranged at a position shifted from a center line of the light transmissive tubular member. First and second caps that are attached to both ends in the longitudinal direction of the light-transmissive tubular member and insulatively support a pair of electrode terminals connected to a fluorescent lamp fixture;
A first joint member and a second joint member connecting the light transmissive tubular member and the base;
Each of the first and second joint members has an annular filling recess for inserting and supporting both side ends in the longitudinal direction of the light transmissive tubular member,
The fluorescent lamp type illumination device according to claim 1 or 2, wherein a filling material is filled in the filling recess.   The fluorescent lamp type illumination device according to any one of claims 1 to 3, further comprising: a light direction changing member that is provided on the substrate and converts a direction of light emitted from the light emitting element. .   5. The fluorescent lamp type illumination device according to claim 1, wherein the light emitting element is a light emitting diode.

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