WO2013176000A1

WO2013176000A1 - Lighting apparatus

Info

Publication number: WO2013176000A1
Application number: PCT/JP2013/063402
Authority: WO
Inventors: 良仁武内; 山岡　正典; 智治松川
Original assignee: 船井電機株式会社
Priority date: 2012-05-23
Filing date: 2013-05-14
Publication date: 2013-11-28
Also published as: TW201411041A; JP2014003010A

Abstract

A straight tube LED lighting apparatus (lighting apparatus) (100) of the present invention is provided with a protruding section (121) that protrudes from the inner surface (12a) of a tube body (1) to the inner side, and the lighting apparatus is configured to regulate, by means of the protruding section, moving of a heat sink (4) from a predetermined disposing position.

Description

Lighting device

The present invention relates to a lighting device, and more particularly to a lighting device including an element substrate on which a light emitting element is mounted.

Conventionally, an illumination device including an element substrate on which a light emitting element is mounted is known. Such an illuminating device is disclosed in, for example, Japanese Patent Application Laid-Open No. 2012-69302.

In the above Japanese Unexamined Patent Publication No. 2012-69302, an LED substrate (element substrate) on which an LED (light emitting element) is mounted, a base (heat sink) that supports the LED substrate and radiates the heat of the LED, An LED lamp (illumination device) including a cylindrical straight tube (tubular body) that houses a base therein is disclosed. The base is configured to be attached to the inner surface of the straight pipe with an adhesive.

JP 2012-69302 A

However, in the LED lamp (illumination device) disclosed in JP 2012-69302 A, when a base (heat sink) that supports an LED substrate (element substrate) is attached to the inner surface of a straight tube (tubular body), a cylindrical shape is used. It is difficult to position the base with respect to the straight pipe, and it is considered that the base supporting the LED substrate may be attached at a position shifted from a predetermined arrangement position.

The present invention has been made to solve the above-described problems, and one object of the present invention is to suppress the heat sink supporting the element substrate from being disposed at a position deviated from a predetermined arrangement position. It is providing the illuminating device which can do.

An illumination device according to a first aspect of the present invention includes an element substrate on which a light emitting element is mounted, a heat sink that supports the element substrate, and dissipates heat from the light emitting element, and is formed in a cylindrical shape, and the heat sink is accommodated therein. And a protrusion protruding inward from the inner surface of the tube, and the protrusion is configured to restrict the heat sink from moving from a predetermined position.

In the lighting device according to the first aspect of the present invention, as described above, the protrusion that protrudes inward from the inner surface of the tubular body restricts the heat sink supporting the element substrate from moving from a predetermined arrangement position. With this configuration, since the heat sink can be easily positioned at a predetermined arrangement position by the protrusion, it is possible to suppress the heat sink supporting the element substrate from being arranged at a position shifted from the predetermined arrangement position. be able to. In addition, by arranging the heat sink at a predetermined arrangement position, the element substrate supported by the heat sink can be arranged at an appropriate arrangement position, so that the light emitted from the light emitting element is efficiently irradiated outside the tube body. can do.

In the illumination device according to the first aspect described above, preferably, the protrusion includes a pair of ribs that are disposed at substantially the same height position when viewed from the tube axis direction and are formed to extend in the tube axis direction. The rib is configured to function as a guide when the heat sink is inserted into the tube. If comprised in this way, since a pair of rib which can position a heat sink can be diverted as a guide at the time of inserting a heat sink in a pipe, the number of parts increases compared with the case where a guide is provided separately. While suppressing this, the heat sink can be easily inserted into the tube body along the pair of ribs.

In this case, preferably, the pair of ribs are formed so as to extend from one end of the tubular body to the other end. If comprised in this way, when inserting a heat sink into a pipe body, a heat sink can be smoothly guide | induced to the whole region of the pipe axis direction of a pipe body by a pair of ribs, Therefore A heat sink is easier to the inside of a pipe body. Can be inserted.

In the configuration in which the protruding portion includes a pair of ribs, the heat sink preferably has a flat portion having a portion on which the element substrate is placed and a curvature substantially the same as the inner surface of the tube body when viewed from the tube axis direction of the tube body. The arc-shaped portion having an outer surface of the tube, the arc-shaped portion abutting against the inner surface of the tubular body, and the flat-shaped portion abutting against the pair of ribs, so that movement from a predetermined arrangement position is regulated. It is configured. If comprised in this way, since a movement of the heat sink which supports an element substrate is controlled by a pair of rib and the inner surface of a tubular body, a heat sink can be positioned more accurately with respect to a tubular body.

In the configuration in which the heat sink includes a flat portion and an arc-shaped portion, preferably, the upper surfaces of the pair of ribs are substantially at the same height as the light emitting element mounting surface of the element substrate placed on the flat portion of the heat sink. Are arranged. If comprised in this way, it can suppress that the light radiate | emitted from the light emitting element is interrupted by a pair of rib, Therefore The light radiate | emitted from the light emitting element can be efficiently irradiated to the exterior of a tubular body. .

In the configuration in which the heat sink includes a flat portion and an arc-shaped portion, preferably, the flat portion of the heat sink is provided with a substrate positioning portion of an element substrate placed on the flat portion of the heat sink, The substrate positioning portion is formed so that the protruding amount from the flat portion is smaller than the plate thickness of the element substrate. If comprised in this way, since it can suppress that the light radiate | emitted from the light emitting element mounted in the element board | substrate is interrupted by the board | substrate positioning part, suppressing the position shift of an element board | substrate by a board | substrate positioning part, The light emitted from the light emitting element can be efficiently irradiated to the outside of the tube body.

In the configuration in which the heat sink includes a flat portion and an arc portion, the heat sink is preferably fixed to the tube body with an adhesive applied between the outer surface of the arc portion and the inner surface of the tube body. An adhesive escape groove extending in the tube axis direction is formed on the outer surface of the arc-shaped portion. If comprised in this way, in the state which positioned the heat sink in the predetermined arrangement position with a pair of rib and inner surface, it can be easily firmly fixed to a predetermined arrangement position using an adhesive agent. In addition, even when a large amount of adhesive is applied, it is possible to prevent the adhesive from protruding between the outer surface of the arc-shaped part and the inner surface of the tubular body by allowing the excess adhesive to enter the adhesive escape groove. Can do.

In the configuration in which the protruding portion includes a pair of ribs, the tube body is preferably made of a resin material, and the pair of ribs are integrally formed on the inner surface of the tube body. If comprised in this way, the heat sink which supports an element substrate can be easily positioned with respect to a tubular body with a pair of rib, without increasing a number of parts.

An illumination device according to a second aspect of the present invention includes an element substrate on which a light emitting element is mounted, a heat sink that supports the element substrate and dissipates heat from the light emitting element, and is formed in a cylindrical shape, and the heat sink is accommodated therein. In the state where the tube body to be attached, the bottomed tube-shaped cap including the terminal, including the terminal, the heat sink is housed inside the tube body and the cap is attached to the end portion of the tube body, A spacer member disposed in a gap in the tube axis direction between the heat sink and the cap.

In the lighting device according to the second aspect of the present invention, as described above, the heat sink and the cap in a state where the heat sink supporting the element substrate is housed inside the tube and the cap is attached to the end of the tube. Since the spacer member can be easily positioned by the spacer member in the tube axis direction of the tube body, the element substrate is supported in the tube axis direction of the tube body. It is possible to suppress the heat sink for radiating the light emitting element to be disposed at a position shifted from a predetermined arrangement position. In addition, by arranging the heat sink for radiating the light emitting element at a predetermined arrangement position, the element substrate supported by the heat sink can be arranged at an appropriate arrangement position, so that the light emitted from the light emitting element can be The outside can be efficiently irradiated.

In the lighting device according to the second aspect, preferably, the spacer member has an outer surface having substantially the same curvature as the inner surface of the tubular body. According to this structure, the spacer member can be easily inserted into the tube body with the outer surface of the spacer member being along the inner surface of the tube body, and the spacer member is in surface contact with the inner surface of the tube body. Therefore, the spacer member can be stably arranged.

In this case, preferably, a circuit board on which electronic components are mounted is arranged at a position corresponding to the spacer member inside the tubular body. If comprised in this way, since the large space (space) can be ensured inside the circular arc of a spacer member in the position corresponding to the spacer member inside a tubular body, the empty space inside a tubular body becomes small. As a result, the circuit board can be easily arranged at a position corresponding to the spacer member inside the tubular body.

In the lighting device according to the second aspect, preferably, the cap is a first cap attached to one end portion of the tube body in the tube axis direction, and a second cap attached to the other end portion of the tube body in the tube axis direction. The spacer member includes a first spacer member disposed in a gap in the tube axis direction between the one end portion in the tube axis direction of the heat sink and the first cap, and the other end portion in the tube axis direction of the heat sink. And a second spacer member disposed in a gap in the tube axis direction between the second cap and the second cap. According to this structure, the first spacer member and the second spacer member can position the heat sink in the tube axis direction from both sides of the heat sink. Therefore, the heat sink that supports the element substrate in the tube axis direction of the tube body. Can be further suppressed from being arranged at a position deviated from a predetermined arrangement position.

In the lighting device according to the second aspect, preferably, the inner surface of the tube body is provided with a protrusion that protrudes toward the inside of the tube and restricts the movement of the heat sink, and the protrusion is the heat sink. At the same time, the spacer member is configured to be restricted from moving. With this configuration, since the protrusion that restricts the movement of the heat sink can be used as a movement restricting member for the spacer member, the number of parts is increased compared to the case where a separate movement restricting member for the spacer member is provided. It is possible to prevent the spacer member from moving from a predetermined position by the protrusion. As a result, the spacer member can accurately and stably position the heat sink.

In this case, the protrusion is preferably formed so as to extend in the tube axis direction, and is configured to function as a guide when the heat sink and the spacer member are inserted into the tube body. With this configuration, the protrusion that can restrict the movement of both the heat sink and the spacer member can be used as a guide when the heat sink and the spacer member are inserted into the tube. In comparison with this, it is possible to easily insert both the heat sink and the spacer member into the tube body along the protruding portion while suppressing an increase in the number of parts.

An illumination device according to a third aspect of the present invention includes an element substrate on which a light emitting element is mounted, a power supply substrate that converts AC power into DC power, a control board that controls the voltage of DC power and supplies the element substrate to the element substrate. And a tube body that accommodates the element substrate, the power supply substrate, and the control substrate therein, and the element substrate is disposed between the power supply substrate and the control substrate.

In the illumination device according to the third aspect, as described above, the power supply substrate and the control substrate are separated to both end portions of the device substrate of the illumination device by disposing the element substrate between the power supply substrate and the control substrate. Since it can be arranged symmetrically in a well-balanced manner, the light-emitting elements can be arranged in a well-balanced manner in the lighting device, and as a result, it is possible to prevent light from being irradiated while being biased to one side in the tube axis direction Can do. In addition, since the power supply substrate, the control substrate, and the element substrate can be arranged apart from each other, heat generated from the respective substrates can be dispersed to prevent the light emitting element from reaching a high temperature. Thereby, it can suppress that the light emission characteristic of a light emitting element falls with a heat | fever. In addition, unlike the case where the power supply board and the control board are attached to the back surface of the element board, it is easy to secure a space in the height direction in which the power supply board and the control board are arranged. The degree of freedom of the size (height) of the electronic component can be increased.

In the illumination device according to the third aspect, preferably, the lighting device further includes a pair of bottomed tube-shaped caps that include terminals for supplying AC power and close both ends of the tube, The end portion is inserted, and the power supply substrate and the control substrate are respectively disposed in regions covered by the tube shape portion of the cap of the tube body. If comprised in this way, a power supply board and a control board can be efficiently arrange | positioned in the space between the both ends of an element substrate, and the bottom part of a pair of cap. In addition, since both the power supply board and the control board can be covered with both the tube body and the cap, the power supply board and the control board can be reliably protected from external impacts.

In this case, it is preferable to further include a heat sink that supports the element substrate and dissipates heat from the light emitting element, the heat sink is formed hollow along the tube axis direction, and the power supply board and the control board are formed hollow. The heat sinks are connected to each other through wiring arranged in the internal space. With this configuration, even in a configuration in which the power supply board and the control board are arranged on both sides of the element substrate, the wiring that connects them to each other is arranged in the internal space of the heat sink, and the light emitted from the light emitting element is blocked by the wiring. Can be prevented.

In the configuration including the heat sink according to the third aspect, preferably, one spacer member is disposed in each of the space in the tube axis direction between the heat sink and the bottom of the pair of caps on both sides of the heat sink in the tube axis direction. In addition, the power supply board and the control board are each arranged at a position corresponding to the spacer member. If comprised in this way, a power supply board and a control board can be easily arrange | positioned in the space between the heat sink secured by the spacer member and the bottom part of a cap.

In the configuration including the bottomed tube-shaped cap of the third aspect, the cap is preferably formed of an opaque resin. With this configuration, the power supply board and the control board can be hidden from the user by covering the power supply board and the control board with the tube-shaped portion of the tube cap formed of an opaque resin.

In the configuration including the bottomed tube-shaped cap according to the third aspect, preferably, a seal is affixed in the vicinity of the region covered with the cap of the tubular body in a state where both ends of the tubular body are closed by the cap. Has been. If comprised in this way, even if the wiring connected to the power supply board and control board of the area | region covered with the cap protrudes from the area | region covered with a cap, it can hide with a seal | sticker.

According to the present invention, as described above, it is possible to suppress the heat sink supporting the element substrate from being arranged at a position shifted from a predetermined arrangement position.

It is the perspective view which showed the whole structure of the straight tube | pipe type LED lighting apparatus by 1st Embodiment of this invention. It is the disassembled perspective view which showed the whole structure of the straight tube | pipe type LED lighting apparatus by 1st Embodiment of this invention. It is the top view which showed the board | substrate for LED of the straight tube | pipe type LED lighting apparatus by 1st Embodiment of this invention. It is sectional drawing which showed the inside of the tube of the straight tube | pipe type LED lighting apparatus by 1st Embodiment of this invention. It is the perspective view which showed the inside of the tube of the straight tube | pipe type LED lighting apparatus by 1st Embodiment of this invention. It is the perspective view which showed the groove part of the heat sink of the straight tube | pipe type LED lighting apparatus by 1st Embodiment of this invention. It is the schematic which showed the arrangement | positioning state of the board | substrate for power supplies and the board | substrate for control of the straight tube | pipe type LED lighting apparatus by 1st Embodiment of this invention. It is the perspective view which showed the structure of the whole straight tube | pipe type LED lighting apparatus by 2nd Embodiment of this invention. It is the disassembled perspective view which showed the whole structure of the straight tube | pipe type LED lighting apparatus by 2nd Embodiment of this invention. It is the top view which showed the board | substrate for LED of the straight tube | pipe type LED lighting apparatus by 2nd Embodiment of this invention. FIG. 10 is a sectional view taken along line 400-400 in FIG. It is the perspective view which showed the state at the time of inserting a heat sink into the tube of the straight tube | pipe type LED lighting apparatus by 2nd Embodiment of this invention. It is the schematic which showed the arrangement | positioning state of the spacer member of the straight tube | pipe type LED lighting apparatus by 2nd Embodiment of this invention. It is the figure which showed the inside of the cap of the straight tube | pipe type LED lighting apparatus by 2nd Embodiment of this invention. It is the perspective view which showed the state at the time of inserting a spacer member in the tube of the straight tube | pipe type LED lighting apparatus by 2nd Embodiment of this invention. FIG. 9 is a cross-sectional view taken along line 500-500 in FIG. It is the perspective view which showed the whole structure of the straight tube | pipe type LED lighting apparatus by 3rd Embodiment of this invention. It is the disassembled perspective view which showed the structure of the whole straight tube | pipe type LED lighting apparatus by 3rd Embodiment of this invention. It is the top view which showed the LED board of the straight tube | pipe type LED lighting apparatus by 3rd Embodiment of this invention. FIG. 18 is a cross-sectional view taken along line 600-600 in FIG. It is the perspective view which showed the state at the time of inserting a heat sink into the tube of the straight tube | pipe type LED lighting apparatus by 3rd Embodiment of this invention. It is the schematic which showed the arrangement | positioning state of the power supply board and control board of the straight tube | pipe type LED lighting apparatus by 3rd Embodiment of this invention. It is the figure which showed the inner side of the cap of the straight tube | pipe type LED lighting apparatus by 3rd Embodiment of this invention. It is the schematic diagram which showed the wiring of the straight tube | pipe type LED lighting apparatus by 3rd Embodiment of this invention. FIG. 18 is a cross-sectional view taken along line 700-700 in FIG. FIG. 18 is a cross-sectional view taken along the line 800-800 in FIG. It is the perspective view which showed the state at the time of inserting a cap in the tube of the straight tube | pipe type LED lighting apparatus by 3rd Embodiment of this invention. It is the disassembled perspective view which showed the modification of the straight tube | pipe type LED lighting apparatus by 3rd Embodiment of this invention.

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

(First embodiment)
With reference to FIGS. 1 to 7, the configuration of a straight tube type LED lighting device 100 according to a first embodiment of the present invention will be described. The straight tube type LED lighting device 100 is an example of the “lighting device” in the present invention.

As shown in FIG. 1, a straight tube type LED lighting apparatus 100 according to the first embodiment includes a tube 1 formed in a cylindrical shape and two caps attached to both ends of the tube 1 in the tube axis direction (X direction). 2 is provided. In addition, as shown in FIG. 2, a plurality of LED substrates 3 on which LED elements 3 a (see FIG. 3) are mounted and a plurality of LED substrates 3 are supported inside the tube 1, and the LED elements 3 a A heat sink 4 that dissipates heat, a power supply substrate 5 on which an electronic component 5a is mounted, and a control substrate 6 on which an electronic component 6a is mounted are accommodated. The tube 1 is an example of the “tube body” of the present invention, and the LED substrate 3 is an example of the “element substrate” of the present invention. The LED element 3a is an example of the “light emitting element” in the present invention.

The tube 1 is formed in a cylindrical shape extending linearly. Specifically, as shown in FIGS. 2 and 4, the tube 1 includes a front portion 11 having a substantially semicircular arc-shaped cross section disposed on the Z1 direction side, and a substantially semicircular arc shape disposed on the Z2 direction side. The front part 11 and the back part 12 are integrally formed in a cylindrical shape. Moreover, the tube 1 consists of resin materials (for example, polycarbonate), and the front part 11 and the back part 12 are integrally molded. The front portion 11 includes a light diffusing material, and is configured to transmit light while diffusing light emitted from the LED element 3a. The back portion 12 includes a light diffusing material, and is configured to transmit light less than the front portion 11. The front portion 11 is configured to be translucent, and the back portion 12 is configured to be substantially opaque.

Also, a pair of ribs 121 are provided inside the tube 1 as shown in FIGS. Specifically, the pair of ribs 121 are formed so as to protrude inward from the inner surface 12a of the back portion 12 (the inner surface 12a of the tube 1). The pair of ribs 121 is an example of the “projection” in the present invention. The pair of ribs 121 are formed so as to extend in the tube axis direction over the entire region in the tube axis direction from one end of the tube 1 in the tube axis direction (X direction) to the other end. As shown in FIG. 4, the pair of ribs 121 are integrally formed on the inner surface 12 a of the back portion 12. The pair of ribs 121 are disposed at substantially the same height as viewed from the tube axis direction (X direction). Specifically, the pair of ribs 121 is substantially perpendicular to a flat portion 41 (to be described later) of the heat sink 4 as viewed from the tube axis direction (X direction), and a center line C1 passing through the center point O of the cylindrical tube 1 In contrast, they are arranged at positions symmetrical with respect to each other.

Further, the pair of ribs 121 are arranged so that the upper surface is substantially at the same height as the light emitting element mounting surface 31 of the LED substrate 3 supported by the heat sink 4. The pair of ribs 121 is substantially parallel to a flat portion 41 described later of the heat sink 4 as viewed from the tube axis direction (X direction), and with respect to a center line C2 passing through the center point O of the cylindrical tube 1. Further, it is arranged on the side (Z2 direction side) where the back portion 12 is arranged. Further, as described later, the pair of ribs 121 has a function of regulating the movement of the heat sink 4 and is configured to function as a guide when the heat sink 4 is inserted into the tube 1. These functions will be described in detail below.

The two caps 2 have the same configuration. Specifically, as shown in FIGS. 1 and 2, the two caps 2 are attached so as to close the openings at both ends in the tube axis direction (X direction) of the tube 1. The two caps 2 are attached so as to cover both end portions of the tube 1 from the outside. Each cap 2 is provided with two terminals 21 protruding outward. The cap 2 is provided to take in electric power supplied from outside into the straight tube type LED lighting device 100. The two caps 2 are mainly made of the same resin material as the tube 1 (for example, polycarbonate).

As shown in FIG. 2, the plurality of LED substrates 3 have a rectangular shape in plan view and are formed to extend in the tube axis direction (X direction). Further, the plurality of LED substrates 3 are connected to the adjacent LED substrates 3 by wiring not shown. Each LED substrate 3 is made of a glass-based substrate (for example, a glass composite substrate) excellent in thermal conductivity, and has a plate thickness of about 1 mm. Further, as shown in FIGS. 3 and 4, a plurality of LED elements 3 a are mounted on the light emitting element mounting surface 31 of each LED substrate 3. As shown in FIG. 3, the plurality of LED elements 3a are arranged in a line at a predetermined interval in the tube axis direction (X direction). Further, as shown in FIGS. 3 to 5, the phosphor member 3b is provided on the light emitting element mounting surface 31 of the LED substrate 3 so as to cover the plurality of LED elements 3a. The phosphor member 3b has a dome shape when viewed from the tube axis direction, and is provided to extend in the tube axis direction. The phosphor member 3b is configured to emit light upon receiving light emitted from the LED element 3a.

The heat sink 4 is formed so as to extend in the tube axis direction (X direction) as shown in FIG. Specifically, the heat sink 4 is formed to have a length smaller than that of the tube 1 and is configured to be disposed at substantially the center of the tube 1 in the tube axis direction. The heat sink 4 is made of a metal material (for example, aluminum material) having excellent thermal conductivity. Further, the heat sink 4 is formed in a hollow shape as shown in FIGS. 4 and 5. Specifically, the heat sink 4 includes a flat portion 41 disposed on the Z1 direction side and an arc-shaped portion 42 disposed on the Z2 direction side. A reinforcing rib 43 that connects the flat portion 41 and the arc-shaped portion 42 to each other is provided between the flat portion 41 and the arc-shaped portion 42. The flat portion 41, the arc-shaped portion 42, and the reinforcing rib 43 have a thickness of about 0.7 mm. By forming the hollow shape in this way, the heat sink 4 can be reduced in weight.

The flat portion 41 has a substrate placement portion 41a on which the LED substrate 3 is placed, and is formed in a flat shape. Further, the flat portion 41 is provided with a pair of ribs 411 extending in the tube axis direction over the entire region in the tube axis direction from one end portion of the heat sink 4 in the tube axis direction to the other end portion. As shown in FIG. 4, the pair of ribs 411 protrude from the flat portion 41 toward the Z1 direction and are disposed at both ends of the substrate platform 41a in the Y direction. The pair of ribs 411 are integrally formed with the flat portion 41. The pair of ribs 411 is configured to function as a positioning member that restricts movement of the LED substrate 3 in the Y direction. Further, the pair of ribs 411 are formed so that the protruding amount in the Z1 direction is smaller than the plate thickness (the thickness in the Z1 direction) of the LED substrate 3. Thereby, it is possible to prevent light emitted from the LED element 3 a from being blocked by the pair of ribs 411. The LED substrate 3 is fixedly attached to the substrate mounting portion 41a by an adhesive member (for example, double-sided tape). The pair of ribs 411 is an example of the “substrate positioning part” in the present invention.

As shown in FIG. 4, the arc-shaped portion 42 has an outer surface 42 a having substantially the same curvature as the inner surface 12 a of the tube 1 when viewed from the tube axis direction (X direction). That is, the arc-shaped portion 42 is formed in a substantially arc shape with substantially the same curvature as the inner surface 12a of the tube 1 when viewed from the tube axis direction (X direction). Further, as shown in FIGS. 4 and 6, three groove portions 421 extending in the tube axis direction are provided on the outer surface 42 a of the arc-shaped portion 42. The three groove portions 421 are provided in order to release an excess of an adhesive (not shown) applied to the outer surface 42a of the arc-shaped portion 42 in order to fix the heat sink 4 and the tube 1. One of the three groove portions 421 is disposed at the center of the arc-shaped portion 42 in the Y direction (on the center line C1) when viewed from the tube axis direction, and the other two are located with respect to the center line C1. Are arranged in line symmetrical positions. Each groove portion 421 has a substantially arc shape when viewed from the tube axis direction, and is formed to be recessed inside the heat sink 4. The groove portion 421 is an example of the “adhesive escape groove” in the present invention.

The heat sink 4 is restricted from moving from a predetermined arrangement position by a pair of ribs 121 provided in the tube 1 while being housed inside the tube 1. Specifically, the heat sink 4 is sandwiched between the pair of ribs 121 and the inner surface 12a of the tube 1 and thereby rotates in the direction intersecting the tube axis direction of the tube 1 (Y direction, Z direction, and around the tube axis). (Direction) is restricted. That is, the heat sink 4 moves in a direction intersecting the tube axis direction of the tube 1 by the arc-shaped portion 42 contacting the inner surface 12a of the tube 1 and the flat-shaped portion 41 contacting the pair of ribs 121. It is configured to be regulated. The arc-shaped portion 42 is in contact with the inner surface 12a of the tube 1 having substantially the same curvature in a surface contact state, and the flat portion 41 is in contact with the pair of ribs 121 in the vicinity of both ends in the Y direction. Further, the heat sink 4 is a tube made of an adhesive applied between the outer surface 42 a of the arcuate portion 42 and the inner surface 12 a of the tube 1 in a state where movement is restricted by the pair of ribs 121 and the inner surface 12 a of the tube 1. 1 is bonded. Thereby, the heat sink 4 is fixed to the tube 1.

The power supply substrate 5 is provided for mounting a plurality of electronic components 5a for supplying power to the plurality of LED elements 3a as shown in FIGS. The control board 6 is provided for mounting a plurality of electronic components 6a that perform control operations for performing brightness adjustment and the like. As shown in FIG. 7, the power supply substrate 5 and the control substrate 6 are each configured to be disposed in the space on both sides in the X direction of the heat sink 4 inside the tube 1. Specifically, the power supply substrate 5 and the control substrate 6 are disposed in a space outside the heat sink 4 disposed in the center of the tube 1 in the tube axis direction (X direction), and the heat sink 4 is disposed on both sides in the tube axis direction. It is provided at a position to be sandwiched from. In addition, the power supply substrate 5 and the control substrate 6 are disposed inside the tube 1 at positions that are substantially covered by the caps 2 that are attached to both ends of the tube 1. The power supply substrate 5 and the control substrate 6 are fixedly attached to the inner surface 11a (see FIG. 4) of the front portion 11 of the tube 1 with an adhesive. Specifically, the power supply substrate 5 (the control substrate 6) is configured so that the mounting surface 51 (61) of the electronic component 5a (6a) faces the back portion 12 side (Z2 direction side) of the tube 1. Are fixedly attached to the inner surface 11a (see FIG. 4) of the front portion 11 with an adhesive.

Next, the assembly procedure of the straight tube type LED lighting device 100 will be described with reference to FIG. 2, FIG. 4, FIG. 5 and FIG.

First, as shown in FIGS. 2 and 5, the heat sink 4 is inserted into the tube 1 with the LED substrate 3 attached to the substrate mounting portion 41 a of the heat sink 4. Specifically, after applying an adhesive to the outer surface 42 a of the arc-shaped portion 42 of the heat sink 4, the heat sink 4 to which the LED substrate 3 is attached is inserted into the tube 1. At this time, as shown in FIGS. 4 and 5, the heat sink 4 is inserted into a region sandwiched between the pair of ribs 121 and the inner surface 12 a of the tube 1. Specifically, the heat sink 4 is press-fitted into the tube 1 in a state where movement is restricted by the inner surface 12 a of the tube 1 and the pair of ribs 121. The heat sink 4 is inserted along the pair of ribs 121 in the tube axis direction using the pair of ribs 121 as a guide. Then, after inserting the heat sink 4 to the center of the tube 1 in the tube axis direction, as shown in FIGS. 2 and 7, the power supply substrate 5 and the control substrate are respectively inserted from both ends of the tube 1 so as to sandwich the heat sink 4. 6 is inserted into the tube 1. At this time, predetermined wirings (not shown) are provided on the power supply substrate 5 and the control substrate 6, and the power supply substrate 5 and the control substrate 6 are attached to the inner surface 11a (see FIG. 4) of the tube 1 with an adhesive. Thereafter, the two caps 2 are attached so as to close the openings at both ends in the tube axis direction of the tube 1.

In the first embodiment, as described above, the pair of ribs 121 protruding inward from the inner surface 12a of the tube 1 restricts the heat sink 4 supporting the LED substrate 3 from moving from a predetermined arrangement position. With this configuration, the heat sink 4 can be easily positioned at a predetermined arrangement position by the pair of ribs 121, so that the heat sink 4 supporting the LED substrate 3 is arranged at a position shifted from the predetermined arrangement position. Can be suppressed. Further, by arranging the heat sink 4 at a predetermined arrangement position, the LED substrate 3 supported by the heat sink 4 can be arranged at an appropriate arrangement position, so that the light emitted from the LED element 3a is transmitted to the tube 1. The outside can be efficiently irradiated.

In the first embodiment, the pair of ribs 121 are formed so as to extend in the tube axis direction and function as a guide when the heat sink 4 is inserted into the tube 1. As a result, the pair of ribs 121 capable of positioning the heat sink 4 can be used as a guide when the heat sink 4 is inserted into the tube 1, so that the number of parts is increased as compared with a case where a guide is provided separately. While suppressing this, the heat sink 4 can be easily inserted into the tube 1 along the pair of ribs 121.

In the first embodiment, the pair of ribs 121 are formed so as to extend from one end portion in the tube axis direction of the tube 1 to the other end portion. Thus, when the heat sink 4 is inserted into the tube 1, the pair of ribs 121 can smoothly guide the heat sink 4 over the entire region of the tube 1 in the tube axis direction. Can be inserted.

Moreover, in 1st Embodiment, the outer surface of the flat part 41 which has the board | substrate mounting part 41a in which the board | substrate 3 for LED is mounted, and the curvature substantially the same as the inner surface 12a of the tube 1 seeing from the tube-axis direction of the tube 1 is shown. An arcuate portion 42 having 42 a is provided on the heat sink 4, and the arcuate portion 42 abuts against the inner surface 12 a of the tube 1 and the flat portion 41 abuts against the pair of ribs 121, thereby moving from a predetermined arrangement position. The heat sink 4 is configured so as to be regulated. Accordingly, the movement of the heat sink 4 that supports the LED substrate 3 is regulated by the pair of ribs 121 and the inner surface 12a of the tube 1, so that the heat sink 4 can be positioned more accurately with respect to the tube 1.

In the first embodiment, the upper surfaces of the pair of ribs 121 are arranged at substantially the same height as the light emitting element mounting surface 31 of the LED substrate 3 placed on the flat portion 41 of the heat sink 4. Thereby, since it can suppress that the light radiate | emitted from LED element 3a is interrupted by a pair of rib 121, the light radiate | emitted from LED element 3a can be efficiently irradiated to the exterior of the tube 1. FIG.

In the first embodiment, the flat portion 41 of the heat sink 4 is provided with a pair of ribs 411 that function as positioning members for the LED substrate 3 placed on the flat portion 41 of the heat sink 4. The pair of ribs 411 is formed so that the protruding amount from the flat portion 41 is smaller than the plate thickness 3 (thickness in the Z1 direction). Thereby, since it can suppress that the light radiate | emitted from the LED element 3a mounted in the board | substrate 3 for LED is interrupted by a pair of rib 411, the position shift of the board | substrate 3 for LED is suppressed by a pair of rib 411. However, the light emitted from the LED element 3a can be efficiently irradiated to the outside of the tube 1.

In the first embodiment, a groove portion 421 extending in the tube axis direction is formed on the outer surface 42 a of the arc-shaped portion 42, and adhesion is applied between the outer surface 42 a of the arc-shaped portion 42 and the inner surface 12 a of the tube 1. The heat sink 4 is fixed to the tube 1 with an agent. Thereby, in a state where the heat sink 4 is positioned at a predetermined arrangement position by the pair of ribs 121 and the inner surface 12a, it can be easily and firmly fixed to the predetermined arrangement position using the adhesive. Further, even when a large amount of adhesive is applied, excess adhesive is prevented from entering the groove portion 421 to prevent the adhesive from protruding between the outer surface 42 a of the arcuate portion 42 and the inner surface 12 a of the tube 1. be able to.

In the first embodiment, the tube 1 is made of a resin material, and the pair of ribs 121 are integrally formed on the inner surface 12a of the tube 1. Thereby, the heat sink 4 that supports the LED substrate 3 can be easily positioned with respect to the tube 1 by the pair of ribs 121 without increasing the number of components.

In addition, it should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

For example, in the first embodiment, the LED element is shown as an example of the light emitting element of the present invention, but the present invention is not limited to this. In the present invention, for example, a light emitting element other than an LED element such as a semiconductor laser element may be used.

In the first embodiment, a pair of ribs are shown as an example of the protrusion of the present invention, but the present invention is not limited to this. In the present invention, if the movement of the heat sink can be restricted, one rib may be used, or three or more ribs may be used.

In the first embodiment, a pair of ribs extending from one end of the tube (tubular body) to the other end are shown as an example of the protrusion of the present invention. However, the present invention is not limited to this. In the present invention, if the movement of the heat sink can be regulated, the rib may be divided into a plurality of parts in the tube axis direction, or may be a protrusion formed in a shape other than the rib shape such as a boss shape. Also good.

Further, in the first embodiment, the configuration in which the pair of ribs are formed so as to protrude only inside the tube (tube body) has been described, but the present invention is not limited to this. In the present invention, the pair of ribs may be protruded to the inside of the tubular body so as to be inclined toward the side where the heat sink is disposed (Z2 direction side). As a result, the heat sink can be sandwiched between the pair of ribs and the inner surface of the tubular body in a more stable state, so that the heat sink can be positioned more accurately.

Further, in the configuration of the first embodiment, the end of the tube (tube body) on the side where the heat sink in the tube axis direction is inserted is a taper whose thickness changes in the direction in which the inner diameter gradually increases toward the outside. You may form in a shape. As a result, the heat sink can be easily inserted into the tube body.

In the first embodiment, the example in which the heat sink is fixed to the tube (tube body) with an adhesive is shown, but the present invention is not limited to this. In the present invention, the heat sink may be fixed by a pair of ribs without using an adhesive.

(Second Embodiment)
With reference to FIGS. 8 to 16, the configuration of a straight tube LED lighting apparatus 200 according to the second embodiment of the present invention will be described. The straight tube type LED lighting device 200 is an example of the “lighting device” in the present invention.

As shown in FIG. 8, a straight tube type LED lighting device 200 according to the second embodiment is attached to a tube 201 formed in a cylindrical shape and both ends of the tube 201 in the tube axis direction (X direction), and a terminal 202a. And two caps 202 having a bottomed tube shape (bottomed cylindrical shape). Further, inside the tube 201, as shown in FIG. 9, a plurality of LED substrates 203 on which the LED elements 203a (see FIG. 10) are mounted, and the plurality of LED substrates 203 are supported and the LED elements 203a are mounted. A heat sink 204 that dissipates heat, a power supply substrate 205 on which an electronic component 205a is mounted, and a control substrate 206 on which an electronic component 206a is mounted are accommodated. Also, one spacer member 207 is provided in each gap between the two caps 202 and the heat sink 204 inside the tube 201. The tube 201 is an example of the “tubular body” in the present invention. The LED substrate 203 is an example of the “element substrate” in the present invention, and the LED element 203a is an example of the “light emitting element” in the present invention.

The tube 201 is formed in a cylindrical shape extending linearly. Specifically, as shown in FIGS. 9 and 11, the tube 201 includes a surface portion 211 having a substantially semicircular arc-shaped cross section disposed on the Z1 direction side, and a substantially semicircular arc shape disposed on the Z2 direction side. The front part 211 and the back part 212 are integrally formed in a cylindrical shape. The tube 201 is made of a resin material (for example, polycarbonate), and the front portion 211 and the back portion 212 are integrally molded. The front portion 211 includes a light diffusing material, and is configured to transmit light while diffusing the light emitted from the LED element 203a. The back part 212 includes a light diffusing material, and is configured to transmit light less easily than the front part 211. Moreover, the front part 211 is configured to be translucent, and the back part 212 is configured to be opaque. The front portion 211 and the back portion 212 have a plate thickness of about 1 mm.

Also, a pair of ribs 121a is provided inside the tube 201 as shown in FIGS. Specifically, the pair of ribs 121a are formed so as to protrude inward from the inner surface 212a of the back portion 212 (the inner surface 212a of the tube 201). Further, the pair of ribs 121a is formed so as to extend in the tube axis direction over the entire region in the tube axis direction from one end portion in the tube axis direction (X direction) of the tube 201 to the other end portion. As shown in FIG. 11, the pair of ribs 121 a is formed integrally with the inner surface 212 a of the back portion 212. The pair of ribs 121a are disposed at substantially the same height as viewed from the tube axis direction (X direction). Specifically, the pair of ribs 121a is substantially perpendicular to a flat portion 241 (to be described later) of the heat sink 204 as viewed from the tube axis direction (X direction), and passes through the center point C1 of the cylindrical tube 201. In contrast, they are arranged at positions symmetrical with respect to each other. The rib 121a is an example of the “projection” in the present invention.

Further, the pair of ribs 121 a are arranged so that the upper surface thereof is at substantially the same height as the light emitting element mounting surface 231 of the LED substrate 203 supported by the heat sink 204. Further, the pair of ribs 121a is substantially parallel to a flat portion 241 (to be described later) of the heat sink 204 as viewed from the tube axis direction (X direction), and with respect to a center line C2 passing through the center point O of the cylindrical tube 201. Further, the rear portion 212 is disposed on the side (Z2 direction side). Further, as will be described later, the pair of ribs 121a has a function of restricting movement of the heat sink 204 and the two spacer members 207, and also functions as a guide when the heat sink 204 and the two spacer members 207 are inserted into the tube 201. Is configured to do. These functions will be described in detail below.

As shown in FIGS. 8 and 9, one of the two caps 202 is attached so as to close the opening of one end of the tube 201 in the tube axis direction (end in the X1 direction), and the other cap 202 is The tube 201 is attached so as to block the opening at the other end (end in the X2 direction) in the tube axis direction. The two caps 202 are examples of the “first cap” and the “second cap” of the present invention, respectively. The two caps 202 have the same configuration. Specifically, the two caps 202 each include a cylindrical portion 221 into which the tube 201 is inserted, and a bottom portion 222 that closes one end of the cylindrical portion 221. Further, as shown in FIGS. 13 and 14, four tongue portions 223 are provided at equal angular intervals inside each cap 202. The four tongue-like portions 223 are arranged on the inner side at a predetermined distance (about 1 mm) from the inner surface 221a of the cylindrical portion 221. When the cap 202 is attached to the tube 201, a gap (about 1 mm) between the four tongues 223 and the inner surface 221a of the cylindrical part 221 has a plate of about 1 mm as shown in FIG. A tube 201 having a thickness is inserted. The cap 202 is made of the same resin material (for example, polycarbonate) as the tube 201, and the cylindrical portion 221, the bottom portion 222, and the tongue-like portion 223 are integrally formed with each other. Each cap 202 is provided with two terminals 202a protruding outward. In addition, the cap 202 is provided to take in electric power supplied from the outside into the straight tube type LED lighting device 200.

As shown in FIG. 9, the plurality of LED substrates 203 have a rectangular shape in plan view and are formed to extend in the tube axis direction (X direction). Further, the plurality of LED substrates 203 are connected to the adjacent LED substrates 203 by wiring not shown. Each LED substrate 203 is made of a glass-based substrate (for example, a glass composite substrate) having excellent thermal conductivity, and has a thickness of about 1 mm. Further, as shown in FIGS. 10 and 11, a plurality of LED elements 203 a are mounted on the light emitting element mounting surface 231 of each LED substrate 203. As shown in FIG. 10, the plurality of LED elements 203a are arranged in a line at a predetermined interval in the tube axis direction (X direction). Further, as shown in FIGS. 10 to 12, a phosphor member 203b is provided on the light emitting element mounting surface 231 of the LED substrate 203 so as to cover the plurality of LED elements 203a. The phosphor member 203b has a dome shape when viewed from the tube axis direction, and is provided to extend in the tube axis direction. The phosphor member 203b is configured to emit light upon receiving light emitted from the LED element 203a.

The heat sink 204 is formed to extend in the tube axis direction (X direction) as shown in FIG. Specifically, the heat sink 204 is formed to have a length smaller than that of the tube 201, and is configured to be disposed substantially at the center of the tube 201 in the tube axis direction. The heat sink 204 is made of a metal material (for example, aluminum material) having excellent thermal conductivity. Moreover, the heat sink 204 is formed in a hollow shape as shown in FIGS. Specifically, the heat sink 204 includes a flat portion 241 disposed on the Z1 direction side and an arc-shaped portion 242 disposed on the Z2 direction side. A reinforcing rib 243 that connects the flat portion 241 and the arc-shaped portion 242 to each other is provided between the flat portion 241 and the arc-shaped portion 242. The flat portion 241, the arc-shaped portion 242 and the reinforcing rib 243 have a thickness of about 0.7 mm. By forming the hollow shape in this way, it is possible to reduce the weight of the heat sink 204.

The flat portion 241 has a substrate placement portion 241a on which the LED substrate 203 is placed, and is formed in a flat shape. The flat portion 241 is provided with a pair of ribs 411a extending in the tube axis direction over the entire region in the tube axis direction from one end portion in the tube axis direction of the heat sink 204 to the other end portion. As shown in FIG. 11, the pair of ribs 411a protrude from the flat portion 241 to the Z1 direction side and are disposed at both ends of the substrate platform 241a in the Y direction. Further, the pair of ribs 411a are formed integrally with the flat portion 241. In addition, the pair of ribs 411a is configured to function as a movement restricting member that restricts the movement of the LED substrate 203 in the Y direction. The pair of ribs 411a are formed so that the protruding amount in the Z1 direction is smaller than the plate thickness (the thickness in the Z1 direction) of the LED substrate 203. Thereby, it is possible to prevent light emitted from the LED element 203a from being blocked by the pair of ribs 411a. Further, the LED substrate 203 is fixedly attached to the substrate platform 241a by an adhesive member (for example, a double-sided tape). As shown in FIG. 11, the arc-shaped portion 242 has an outer surface 242 a having substantially the same curvature as the inner surface 212 a of the tube 201 when viewed from the tube axis direction (X direction). That is, the arc-shaped portion 242 is formed in an arc shape with substantially the same curvature as the inner surface 212a of the tube 201 when viewed from the tube axis direction (X direction).

The heat sink 204 is regulated from being displaced from a predetermined arrangement position by a pair of ribs 121 a provided in the tube 201 in a state of being housed in the tube 201. Specifically, the heat sink 204 is sandwiched between the pair of ribs 121a and the inner surface 212a of the tube 201, thereby crossing the tube axis direction of the tube 201 from a predetermined arrangement position (Y direction, Z direction, and tube axis). It is restricted from shifting in the direction of turning around. That is, the heat sink 204 moves in a direction intersecting the tube axis direction of the tube 201 when the arcuate portion 242 contacts the inner surface 212a of the tube 201 and the flat portion 241 contacts the pair of ribs 121a. It is configured to be regulated. The arc-shaped portion 242 is in contact with the inner surface 212a of the tube 201 having substantially the same curvature in a surface contact state, and the flat portion 241 is in contact with the pair of ribs 121a in the vicinity of both ends in the Y direction. Further, as will be described later, the heat sink 204 is configured to be restricted from being displaced from a predetermined arrangement position in the tube axis direction by two spacer members 207.

As shown in FIGS. 9 and 13, the power supply substrate 205 is provided for mounting a plurality of electronic components 205a for supplying power to the plurality of LED elements 203a. The control board 206 is provided for mounting a plurality of electronic components 206a that perform a control operation for performing brightness adjustment and the like. As shown in FIG. 13, the power supply substrate 205 and the control substrate 206 are configured so as to be disposed in spaces on both sides in the X direction of the heat sink 204 inside the tube 201. Specifically, the power supply substrate 205 and the control substrate 206 sandwich the heat sink 204 from both sides in the tube axis direction in a space outside the heat sink 204 disposed in the center of the tube 201 in the tube axis direction (X direction). Placed in position. The power supply substrate 205 and the control substrate 206 are disposed at positions corresponding to the spacer members 207 disposed on both sides of the heat sink 204 in the tube axis direction. That is, the power supply substrate 205 and the control substrate 206 are disposed at positions overlapping the spacer member 207 in the tube axis direction. The power supply board 205 and the control board 206 are examples of the “circuit board” in the present invention.

Further, the power supply substrate 205 and the control substrate 206 are disposed inside the tube 201 at a position covered by caps 202 attached to both ends of the tube 201. Further, the power supply substrate 205 and the control substrate 206 are fixedly attached to the inner surface 211a of the front portion 211 of the tube 201 with an adhesive. Specifically, the power supply substrate 205 (control substrate 206) is configured so that the mounting surface 251 (261) of the electronic component 205a (206a) faces the back portion 212 side (Z2 direction side) of the tube 201. Are fixedly attached to the inner surface 211a of the front portion 211 with an adhesive.

One of the two spacer members 207 is in a state in which the heat sink 204 is housed inside the tube 201 and one of the two caps 202 is attached to one end portion (end portion in the X1 direction) of the tube 201 (straight tube type) In a state where the LED lighting device 200 is assembled), the LED lighting device 200 is disposed in a gap in the tube axis direction between the heat sink 204 and one cap 202. Further, the other spacer member 207 is configured so that the heat sink 204 and the other spacer member 207 are in a state in which the heat sink 204 is housed inside the tube 201 and the other cap 202 is attached to the other end (end in the X2 direction) of the tube 201. It is arrange | positioned in the clearance gap between the pipe 202 and the pipe-axis direction. The two spacer members 207 are examples of the “first spacer member” and the “second spacer member” in the present invention, respectively.

The two spacer members 207 have the same configuration. Specifically, as shown in FIGS. 12, 15, and 16, the spacer member 207 has an outer surface 207 a having substantially the same curvature as the inner surface 212 a of the tube 201. Specifically, the spacer member 207 is formed in an arc shape having an outer surface 207a having substantially the same curvature as the inner surface 212a of the tube 201 when viewed from the tube axis direction (X direction). That is, the spacer member 207 is formed in a shape along the inner surface 212a of the tube 201 as a whole. The spacer member 207 is formed to extend in the tube axis direction. Further, both end portions of the spacer member 207 in the Y direction are configured to contact the pair of ribs 121 a of the tube 201. That is, the spacer member 207 is restricted from being displaced (moved) from a predetermined arrangement position by the pair of ribs 121a. Specifically, like the heat sink 204, the spacer member 207 is sandwiched between the pair of ribs 121a and the inner surface 212a of the tube 201, thereby crossing the tube axis direction of the tube 201 from a predetermined arrangement position (Y Direction, Z direction, and direction of rotation around the tube axis) are restricted. The outer surface 207a of the spacer member 207 is in contact with the inner surface 212a of the tube 201 having substantially the same curvature in a surface contact state, and both end portions in the Y direction of the spacer member 207 are in contact with the pair of ribs 121a. .

In addition, the spacer member 207 has one end 207b on the heat sink 204 side in the tube axis direction in contact with the heat sink 204 and the other end when the straight tube LED lighting device 200 is assembled as shown in FIG. The portion 207 c is configured to contact the tip of the tongue-like portion 223 of the cap 202. That is, as shown in FIGS. 13 and 15, when the cap 202 is attached to the tube 201, the spacer member 207 is pushed by the other end 207c in the insertion direction by the tongue-like portion 223 of the cap 202. The heat sink 204 is pressed by the end portion 207b so as to be positioned at a predetermined arrangement position.

Next, an assembly procedure of the straight tube type LED lighting device 200 will be described with reference to FIG. 9, FIG. 11 to FIG. 13, FIG. 15, and FIG.

First, as shown in FIGS. 9 and 12, the heat sink 204 is inserted into the tube 201 with the LED substrate 203 attached to the substrate mounting portion 241 a of the heat sink 204. At this time, as shown in FIGS. 11 and 12, the heat sink 204 is inserted into a region sandwiched between the pair of ribs 121a and the inner surface 212a of the tube 201. Specifically, the heat sink 204 is press-fitted into the tube 201 in a state where movement is restricted by the inner surface 212a of the tube 201 and the pair of ribs 121a. The heat sink 204 is inserted along the pair of ribs 121a in the tube axis direction using the pair of ribs 121a as a guide. Then, as shown in FIGS. 9 and 13, the power supply substrate 205 and the control substrate 206 are inserted into the tube 201 from both ends of the tube 201 so as to sandwich the heat sink 204. At this time, predetermined wirings (not shown) are provided on the power supply substrate 205 and the control substrate 206, and the power supply substrate 205 and the control substrate 206 are attached to the inner surface 211a of the tube 201 with an adhesive.

Thereafter, the two spacer members 207 are inserted into the tube 201 from both sides of the tube 201 in the tube axis direction. At this time, as shown in FIGS. 15 and 16, the spacer member 207 is inserted into a region sandwiched between the pair of ribs 121 a and the inner surface 212 a of the tube 201 in the same manner as the heat sink 204. Specifically, the spacer member 207 is press-fitted into the tube 201 in a state where movement is restricted by the inner surface 212a of the tube 201 and the pair of ribs 121a. Further, the spacer member 207 is inserted in the tube axis direction along the pair of ribs 121a using the pair of ribs 121a as a guide.

In this state, the two caps 202 are attached so as to close the openings at both ends of the tube 201 in the tube axis direction. At this time, the other end 207 c of the corresponding spacer member 207 is pressed by the tongue-like portion 223 of the cap 202, and the spacer member 207 is further pushed into the tube 201. The heat sink 204 is positioned at a predetermined arrangement position from both sides in the tube axis direction by one end portions 207b of the two spacer members 207 pushed in from both sides of the tube 201. That is, the heat sink 204 is restricted from being displaced (moved) from the predetermined arrangement position in the tube axis direction by having both end portions in the tube axis direction coming into contact with one end portion 207 b of the corresponding spacer member 207.

In the second embodiment, as described above, in the state where the heat sink 204 supporting the LED substrate 203 is housed inside the tube 201 and the cap 202 is attached to the end portion of the tube 201, the heat sink 204 and the cap 202 are disposed. Since the spacer member 207 can be easily positioned by the spacer member 207 in the tube axis direction of the tube 201, the LED in the tube axis direction of the tube 201 It can suppress that the heat sink 204 for LED element heat radiation supporting the board | substrate 203 for a board | substrate is arrange | positioned in the position shifted | deviated from the predetermined | prescribed arrangement position. Moreover, since the LED substrate 203 supported by the heat sink 204 can be arranged at an appropriate arrangement position by arranging the heat sink 204 for radiating the LED element at a predetermined arrangement position, the LED element 203a is emitted from the LED element 203a. Light can be efficiently emitted to the outside of the tube 201.

In the second embodiment, the spacer member 207 is provided with an outer surface 207a having substantially the same curvature as the inner surface 212a of the tube 201. Thus, the spacer member 207 can be easily inserted into the tube 201 with the outer surface 207a of the spacer member 207 along the inner surface 212a of the tube 201, and the spacer member 207 is in surface contact with the inner surface 212a of the tube 201. Therefore, the spacer member 207 can be stably disposed.

In the second embodiment, the power supply substrate 205 (control substrate 206) on which the electronic component 205a (206a) is mounted is disposed at a position corresponding to the spacer member 207 inside the tube 201. As a result, a large space (space) can be secured inside the arc of the spacer member 207 at a position corresponding to the spacer member 207 inside the tube 201, so that the empty space inside the tube 201 is reduced. As a result, the power supply substrate 205 (control substrate 206) can be easily arranged at a position corresponding to the spacer member 207 inside the tube 201.

In the second embodiment, two caps 202 attached to the one end and the other end in the tube axis direction of the tube 201 are provided, and the end portions of the heat sink 204 are arranged on both sides of the heat sink 204 in the tube axis direction. One spacer member 207 is provided in the gap in the tube axis direction between the cap 202 and the cap 202. Accordingly, since the two spacer members 207 can position the heat sink 204 in the tube axis direction from both sides of the heat sink 204, the heat sink 204 that supports the LED substrate 203 in the tube axis direction of the tube 201 has a predetermined value. Arrangement at a position shifted from the arrangement position can be further suppressed.

In the second embodiment, the inner surface 212a of the tube 201 is provided with a rib 121a that protrudes toward the inner side of the tube 201 and restricts the movement of the heat sink 204, and the rib 121a moves the spacer member 207 together with the heat sink 204. To regulate. As a result, the rib 121a that restricts the movement of the heat sink 204 can be used as a movement restricting member for the spacer member 207, so that the number of parts increases compared to the case where a separate movement restricting member for the spacer member 207 is provided. The ribs 121a can prevent the spacer member 207 from moving from a predetermined position. As a result, the spacer member 207 can position the heat sink 204 accurately and stably.

In the second embodiment, the rib 121a is formed so as to extend in the tube axis direction, and is configured to function as a guide when the heat sink 204 and the spacer member 207 are inserted into the tube 201. As a result, the rib 121a that can regulate the movement of both the heat sink 204 and the spacer member 207 can be used as a guide when the heat sink 204 and the spacer member 207 are inserted into the tube 201. In comparison, both the heat sink 204 and the spacer member 207 can be easily inserted into the tube 201 along the rib 121a while suppressing an increase in the number of parts.

For example, in the second embodiment, the LED element is shown as an example of the light emitting element of the present invention, but the present invention is not limited to this. In the present invention, for example, a light emitting element other than an LED element such as a semiconductor laser element may be used.

In the second embodiment, the example in which two spacer members are provided on both sides of the heat sink in the tube axis direction has been described. However, the present invention is not limited to this. In the present invention, the spacer member may be provided only on one end side in the tube axis direction of the heat sink. That is, it is not necessary to provide a spacer member on the other end side in the tube axis direction of the heat sink.

In the second embodiment, the spacer member is formed in an arc shape having an outer surface with substantially the same curvature as the inner surface of the tube body when viewed from the tube axis direction. However, the present invention is not limited to this. I can't. In the present invention, the spacer member may not have an outer surface with substantially the same curvature as the inner surface of the tubular body, or may have a shape other than an arc shape. If the spacer member has an outer surface with substantially the same curvature as the inner surface of the tubular body, the spacer member can be easily moved along the inner surface of the tubular body as described above. Can be inserted inside. In this case, the spacer member may have a shape other than the circular arc shape, such as a circular shape or a semicircular shape, as long as the spacer member has an outer surface having substantially the same curvature as the inner surface of the tubular body.

In the second embodiment, the example in which the pair of ribs are provided on the inner surface of the tube as the tubular body of the present invention is shown, but the present invention is not limited to this. In the present invention, if the movement of both the heat sink and the spacer member can be restricted, one rib may be used, or three or more ribs may be used.

In the second embodiment, a pair of ribs extending from one end of the tube (tubular body) to the other end are shown as an example of the protrusion of the present invention. However, the present invention is not limited to this. In the present invention, if the movement of the heat sink can be regulated, the rib may be divided into a plurality of parts in the tube axis direction, or may be a protrusion formed in a shape other than the rib shape such as a boss shape. Also good.

In the second embodiment, the description has been given of the configuration in which the pair of ribs are formed so as to protrude merely inside the tube (tube body), but the present invention is not limited to this. In the present invention, the pair of ribs may protrude toward the inside of the tubular body so as to be inclined toward the side (Z2 direction side) where the heat sink and the spacer member are disposed. In this case, since the heat sink and the spacer member can be sandwiched between the pair of ribs and the inner surface of the tube body in a more stable state, the heat sink and the spacer member can be positioned more accurately.

In the configuration of the second embodiment, both end portions of the tube (tube body) in the tube axis direction may be formed in a tapered shape in which the wall thickness changes in the direction in which the inner diameter gradually increases toward the outside. . As a result, the spacer member can be easily inserted into the tube body from both sides of the tube body.

In the second embodiment, the bottomed cylindrical cap is shown as an example of the cap of the present invention, but the present invention is not limited to this. In the present invention, for example, the tube may have a bottomed tube shape other than the bottomed cylindrical shape such as a polygonal cross section.

(Third embodiment)
With reference to FIGS. 17 to 27, the configuration of a straight tube type LED lighting apparatus 300 according to a third embodiment of the present invention will be described. The straight tube type LED lighting device 300 is an example of the “lighting device” in the present invention.

As shown in FIG. 17, the straight tube type LED lighting device 300 according to the third embodiment is attached to a tube 301 formed in a linearly extending tube shape and both ends of the tube 301 in the tube axis direction (X direction). And a pair of

caps

302a and 302b. Further, inside the tube 301, as shown in FIG. 18, a plurality of LED boards 303 on which the LED elements 303a (see FIG. 19) are mounted, and the plurality of LED boards 303 are supported and the heat of the LED elements 303a is heated. A heat sink 304 that dissipates heat, a power supply substrate 305 on which the electronic component 305a is mounted, and a control substrate 306 on which the electronic component 306a is mounted are accommodated. In the tube 301, two spacer members 307 are provided in a gap between the pair of

caps

302a and 302b and the heat sink 304. The tube 301 is an example of the “tube body” in the present invention, and the LED substrate 303 is an example of the “element substrate” in the present invention. The LED element 303a is an example of the “light emitting element” in the present invention.

The tube 301 has a tubular shape extending linearly and is formed in a cylindrical shape. Specifically, as shown in FIGS. 18 and 20, the tube 301 includes a surface portion 311 having a substantially semicircular arc-shaped cross section disposed on the Z1 direction side, and a substantially semicircular arc shape disposed on the Z2 direction side. The front portion 311 and the back portion 312 are integrally formed in a cylindrical shape. The tube 301 is made of a resin material (for example, polycarbonate), and the front portion 311 and the back portion 312 are integrally molded. The front portion 311 includes a light diffusing material and is configured to transmit light while diffusing light emitted from the LED element 303a. The back portion 312 includes a light diffusing material, and is configured to transmit light less easily than the front portion 311. The front portion 311 is configured to be translucent, and the back portion 312 is configured to be substantially opaque. The front portion 311 and the back portion 312 have a plate thickness of about 1 mm.

Also, as shown in FIGS. 18, 20, and 21, a pair of ribs 121b are provided inside the tube 301. The pair of ribs 121b are formed so as to extend in the tube axis direction over the entire region in the tube axis direction from one end of the tube 301 in the tube axis direction (X direction) to the other end. Further, as will be described later, the pair of ribs 121b has a function of restricting movement of the heat sink 304 and the two spacer members 307, and also functions as a guide when the heat sink 304 and the two spacer members 307 are inserted into the tube 301. Is configured to do.

As shown in FIGS. 17 and 18, the cap 302 a is attached so as to close the opening at one end (end in the X1 direction) of the tube 301 in the tube axis direction, and the cap 302 b is installed in the tube axis direction of the tube 301. It attaches so that the opening of the other edge part (edge part of X2 direction) of this may be plugged up. The

caps

302a and 302b have the same configuration. For this reason, hereinafter, the configuration of the cap 302a is mainly described, and a part of the description of the cap 302b is omitted. The cap 302a has a bottomed tube shape. Specifically, the cap 302a (302b) includes a tube-shaped portion 321a (321b) into which the tube 301 is inserted and a bottom portion 322a (322b) that closes one end of the tube 301. Further, as shown in FIGS. 22 and 23, four tongue-like portions 323a (323b) are provided at equal angular intervals inside the cap 302a (302b). The four tongue-shaped portions 323a (323b) are arranged on the inner side at a predetermined distance (about 1 mm) from the inner surface 321c (321d) of the tube-shaped portion 321a (321b). When the cap 302a (302b) is attached to the tube 301, there is a gap (about 1 mm gap) between the four tongue-shaped portions 323a (323b) and the inner surface 321c (321d) of the tube-shaped portion 321a (321b). As shown in FIG. 22, the tube 301 is inserted. The cap 302a (302b) is made of an opaque resin material (for example, polycarbonate), and the tube-shaped portion 321a (321b), the bottom portion 322a (322b), and the tongue-shaped portion 323a (323b) are integrated with each other. Is formed. Two terminals 324a (324b) projecting to the outside are attached to the cap 302a (302b).

As shown in FIG. 18, the plurality of LED substrates 303 have a rectangular shape in plan view and are formed to extend in the tube axis direction (X direction). The LED board 303 is provided between the power supply board 305 and the control board 306 in the tube axis direction. In addition, the plurality of LED boards 303 are connected to the adjacent LED boards 303 by wiring (not shown). Moreover, each LED board 303 consists of a glass-type board | substrate (for example, glass composite board | substrate) excellent in thermal conductivity, and has a board thickness of about 1 mm. Further, as shown in FIGS. 19 and 20, a plurality of LED elements 303 a are mounted on the light emitting element mounting surface 331 of each LED substrate 303. As shown in FIG. 19, the plurality of LED elements 303a are arranged in a line at a predetermined interval in the tube axis direction (X direction). Further, as shown in FIGS. 19 to 21, a phosphor member 303b is provided on the light emitting element mounting surface 331 of the LED substrate 303 so as to cover the plurality of LED elements 303a. The phosphor member 303b has a dome shape when viewed from the tube axis direction, and is provided so as to extend in the tube axis direction. The phosphor member 303b is configured to receive light emitted from the LED element 303a and emit fluorescence.

The heat sink 304 is formed so as to extend in the tube axis direction (X direction) as shown in FIG. Specifically, the heat sink 304 is formed to have a length smaller than that of the tube 301, and is configured to be disposed substantially at the center of the tube 301 in the tube axis direction. The heat sink 304 is made of a metal material (for example, aluminum material) having excellent thermal conductivity. Further, as shown in FIGS. 20 and 21, the heat sink 304 is formed hollow along the tube axis direction. Specifically, the heat sink 304 includes a flat portion 341 disposed on the Z1 direction side and an arc-shaped portion 342 disposed on the Z2 direction side. A reinforcing rib 343 that connects the flat portion 341 and the arc-shaped portion 342 to each other is provided between the flat portion 341 and the arc-shaped portion 342. Further, two internal spaces 304 a are formed by being surrounded by the flat portion 341, the arc-shaped portion 342, and the reinforcing rib 343. The internal space 304a is formed so as to extend along the tube axis direction. Further, the flat portion 341, the arc-shaped portion 342, and the reinforcing rib 343 have a thickness of about 0.7 mm. By forming it in this way, it is possible to reduce the weight of the heat sink 304.

The flat portion 341 has a substrate placement portion 341a on which the LED substrate 303 is placed, and is formed in a flat shape. In addition, the flat portion 341 is provided with a pair of ribs 411b extending in the tube axis direction over the entire region in the tube axis direction from one end portion of the heat sink 304 in the tube axis direction to the other end portion. Further, the pair of ribs 411b are formed integrally with the flat portion 341. The pair of ribs 411b is configured to function as a positioning member that restricts the movement of the LED substrate 303 in the Y direction. Further, the LED substrate 303 is fixedly attached to the substrate platform 341a with an adhesive member (for example, a double-sided tape). As shown in FIG. 20, the arc-shaped portion 342 has an outer surface 42 a having substantially the same curvature as the inner surface 312 a of the tube 301 when viewed from the tube axis direction (X direction). That is, the arc-shaped portion 342 is formed in an arc shape with substantially the same curvature as the inner surface 312a of the tube 301 when viewed from the tube axis direction.

The heat sink 304 is housed inside the tube 301 and is formed by a pair of ribs 121b provided on the tube 301 in a direction (Y direction and a direction intersecting the tube axis direction (X direction) of the tube 301 from a predetermined arrangement position. (Z direction) is restricted. That is, the heat sink 304 moves in a direction intersecting the tube axis direction of the tube 301 by the arc-shaped portion 342 contacting the inner surface 312a of the tube 301 and the flat-shaped portion 341 contacting the pair of ribs 121b. It is configured to be regulated. The arc-shaped portion 342 is in contact with the inner surface 312a of the tube 301 having substantially the same curvature in a surface contact state, and the flat portion 341 is in contact with the pair of ribs 121b in the vicinity of both ends in the Y direction. Further, as will be described later, the heat sink 304 is configured to be restricted from being displaced from a predetermined arrangement position in the tube axis direction by two spacer members 307.

The power supply substrate 305 is provided for mounting a plurality of electronic components 305a for supplying power to the plurality of LED elements 303a, as shown in FIGS. The electronic component 305a has a function of converting AC power supplied from an AC power source into DC power. As shown in FIGS. 22 and 24, the power supply board 305 is connected to the terminal 324a of the cap 302a via the wiring 131a. AC power is supplied to the power supply board 305 through the terminal 324a of the cap 302a. The power supply substrate 305 is connected to the terminal 324b of the cap 302b via the wiring 131b. The power supply substrate 305 is grounded via the terminal 324b of the cap 302b.

As shown in FIGS. 18, 22, and 26, the control board 306 is provided for mounting a plurality of electronic components 306 a that control the voltage of the DC power converted by the power supply board 305 and supply the voltage to the LED board 303. It has been. The electronic component 306a is configured to control the brightness of light by PWM (Pulse Width Modulation) control. Specifically, the electronic component 306a emits from the LED element 303a by adjusting the duty ratio of the PWM signal (ratio of the signal on time and the signal off time) to control the lighting time and the lighting time of the LED element 303a. Is configured to adjust the brightness. When the duty ratio of the PWM signal is increased, the lighting time becomes longer and the LED element 303a becomes brighter. On the other hand, when the duty ratio of the PWM signal is reduced, the lighting time is shortened and the LED element 303a becomes dark.

Further, as shown in FIGS. 20, 22 and 24, the control board 306 is connected to the power supply board 305 via two

wirings

132a and 132b arranged in the internal space 304a of the heat sink 304. The control board 306 is connected to the LED board 303 via two

wires

133a and 133b so that power can be supplied to the power LED element 303a PWM-modulated by the electronic component 306a.

The power supply substrate 305 is inside the tube 301, outside the end portion on the X1 direction side of the LED substrate 303, and in a space between the end portion on the X1 direction side of the LED substrate 303 and the bottom portion 322a of the cap 302a. Has been placed. The control board 306 is inside the tube 301, outside the end portion on the X2 direction side of the LED board 303, and in a space between the end portion on the X2 direction side of the LED board 303 and the bottom portion 322b of the cap 302b. Has been placed. Further, the power supply board 305 and the control board 306 are arranged so as to sandwich the heat sink 304 from both sides in the tube axis direction in a space outside the heat sink 304 arranged in the center of the tube 301 in the tube axis direction. Further, the power supply substrate 305 and the control substrate 306 are respectively disposed at positions corresponding to the spacer members 307 disposed on both sides of the heat sink 304 in the tube axis direction. That is, the power supply board 305 and the control board 306 are disposed at positions overlapping the spacer member 307 in the tube axis direction.

Further, as shown in FIG. 22, the power supply substrate 305 is disposed in an area covered by the tube-shaped portion 321 a of the cap 302 a of the tube 301. Further, the control board 306 is disposed in an area covered by the tube-shaped portion 321b of the cap 302b of the tube 301. The power supply board 305 and the control board 306 are fixedly attached to the inner surface 311a of the front portion 311 of the tube 301 with an adhesive. Specifically, the power supply board 305 (control board 306) is arranged so that the mounting surface 351 (361) of the electronic component 305a (306a) faces the back 312 side (Z2 direction side) of the tube 301. It is fixedly attached to the inner surface 311a of the part 311 with an adhesive. A part of the

wiring

131b, 132a and 132b connecting the power supply board 305 and the control board 306 that protrudes from the internal space 304a of the heat sink 304 is a mounting surface 351 (361) of the power supply board 305 (control board 306). And the spacer member 307 are collected and stored.

In addition, as shown in FIGS. 17, 18, 21, 22, and 27, an area separated from both ends of the tube 301 by a predetermined distance is opaque (silver) so as to cover the surface portion 311 of the tube 301. The sticker 111 is affixed. Specifically, the seal 111 is a front portion of the tube 301 in a predetermined region from the position corresponding to the end portion on the center portion side in the X direction of the tubes 301 of the

caps

302a and 302b toward the center portion in the X direction of the tube 301. 311 is attached. It should be noted that the

wirings

131b, 132a, and 132b that connect the power supply board 305 and the control board 306 with a seal that is affixed to the front surface 311 of the tube 301 in the vicinity of the ends when the cap 302a closes both ends of the tube 301. It is possible to prevent a part of the portion of the heat sink 304 protruding from the internal space 304a from being visible to the user.

As shown in FIG. 18 and FIG. 22, the spacer member 307 is disposed on both sides of the heat sink 304 in the tube axis direction (X direction) in the tube axis direction between the heat sink 304 and the bottom 322a of the

cap

302a and 322b of the cap 302b. One is arranged in each space. Further, the spacer member 307 is formed in a substantially arc shape as shown in FIGS. 20, 25 and 26 when viewed from the tube axis direction.

The two spacer members 307 have the same configuration. Specifically, as shown in FIGS. 21, 25, and 26, the spacer member 307 has an outer surface 307 a having substantially the same curvature as the inner surface 312 a of the tube 301. The spacer member 307 is formed to extend in the tube axis direction (X direction). Further, both end portions of the spacer member 307 in the Y direction are configured to contact the pair of ribs 121 b of the tube 301. Specifically, like the heat sink 304, the spacer member 307 is sandwiched between the pair of ribs 121b and the inner surface 312a of the tube 301, so that the spacer member 307 deviates in a direction intersecting the tube axis direction of the tube 301 from a predetermined arrangement position. Is regulated. The outer surface 307a of the spacer member 307 contacts the inner surface 312a of the tube 301 having substantially the same curvature in a surface contact state, and both end portions in the Y direction of the spacer member 307 are in contact with the pair of ribs 121b. .

Further, as shown in FIG. 22, the spacer member 307 has one end 307 b on the heat sink 304 side in the tube axis direction in contact with the heat sink 304 and the other end in a state where the straight tube LED lighting device 300 is assembled. The portion 307c is configured to contact the tip of the tongue-like portion 323a (322b) of the cap 302a (302b). That is, as shown in FIGS. 22 and 27, when the cap 302a (302b) is attached to the tube 301, the spacer member 307 has the other end 307c formed by the tongue-like portion 323a (322b) of the cap 302a (302b). By being pushed in the direction of insertion into the tube 301, the heat sink 304 is positioned at a predetermined arrangement position by the one end 307b.

Next, with reference to FIGS. 18, 20 to 22, 24, and 25 to 27, an assembly procedure of the straight tube type LED lighting device 300 will be described.

First, as shown in FIGS. 18 and 21, the heat sink 304 is inserted into the tube 301 with the LED substrate 303 attached to the substrate mounting portion 341 a of the heat sink 304. At this time, as shown in FIGS. 20 and 21, the heat sink 304 is press-fitted into a region sandwiched between the pair of ribs 121 b and the inner surface 312 a of the tube 301. The heat sink 304 is inserted along the pair of ribs 121b in the tube axis direction using the pair of ribs 121b as a guide.

18, 22, and 24, predetermined wiring is applied to the power supply board 305 and the control board 306, and the power supply board 305 and the control board 306 are respectively inserted into the tube 301 from both ends of the tube 301. insert. Specifically, as shown in FIG. 24, the mounting surface 351 (361) of the electronic component 305a (306a) of the power supply board 305 (control board 306) is directed to the back portion 312 side (Z2 direction side) of the tube 301. In this state (see FIG. 21), predetermined wiring is applied to the power supply board 305 and the control board 306. Then, the power supply board 305 and the control board 306 are rotated once (360 degrees) with respect to the tube axis. Thereafter, the power supply board 305 and the control board 306 are inserted into the tube 301 from both ends of the tube 301 so as to sandwich the heat sink 304. As a result, the portion of the predetermined wiring that connects the power supply board 305 and the control board 306 that protrudes from the internal space 304a of the heat sink 304 is twisted with the mounting surface 351 (361) of the power supply board 305 (control board 306). The space between the spacer members 307 is collected and stored. As a result, the LED substrate 303 can be prevented from protruding to the light emitting element mounting surface 331 side of the LED element 303a. Thereafter, the power supply board 305 and the control board 306 are attached to the inner surface 311a of the tube 301 with an adhesive.

Thereafter, the two spacer members 307 are respectively inserted into the tube 301 from both sides of the tube 301 in the tube axis direction. At this time, as shown in FIGS. 25 to 27, the spacer member 307 is inserted into a region sandwiched between the pair of ribs 121b and the inner surface 312a of the tube 301, like the heat sink 304.

In this state, the

caps

302a and 302b are attached so as to close the openings at both ends of the tube 301 in the tube axis direction. At this time, predetermined wiring (see FIG. 24) for connecting the power supply substrate 305 to each of the terminal 324a of the cap 302a and the terminal 324b of the cap 302b is applied. Further, the other end 307 c of the corresponding spacer member 307 is pushed by the tongue-like portion 323 a (322 b) of the cap 2, and the spacer member 307 is further pushed into the tube 301. The heat sink 304 is positioned at a predetermined arrangement position from both sides in the tube axis direction by one end portions 307b of the two spacer members 307 pushed in from both sides of the tube 301. In addition, with the heat sink 304 positioned at a predetermined arrangement position, the spacer member 307 is arranged at a position corresponding to each of the power supply board 305 and the control board 306.

In the third embodiment, as described above, the LED board 303 is disposed between the power supply board 305 and the control board 306, so that the power supply board 305 and the control board 306 are connected to the LED board 303 of the straight tube LED lighting device 300. It can be separated into both end sides and arranged symmetrically with a good balance. Thereby, since the LED element 303a can be arrange | positioned with sufficient balance in the straight tube | pipe type LED lighting apparatus 300, it can suppress that light is irradiated in the state biased to the one side of the tube-axis direction. In addition, since the power supply board 305, the control board 306, and the LED board 303 can be arranged apart from each other, it is possible to disperse the heat generated from the respective boards and suppress the LED element 303a from becoming a high temperature. it can. Thereby, it can suppress that the light emission characteristic of LED element 303a falls with a heat | fever. Further, unlike the case where the power supply board 305 and the control board 306 are attached to the back surface of the LED board 303, it is easy to secure a space in the height direction in which the power supply board 305 and the control board 306 are arranged. In addition, the degree of freedom of the size (height) of the electronic component mounted on the control board 306 can be increased.

In the third embodiment, as described above, a pair of bottomed tube-shaped

caps

302a and 302b that close both ends of the tube 301 are further provided, and the ends of the tube 301 are inserted into the

caps

302a and 302b. The substrate 305 and the control substrate 306 are provided in regions covered with the tube-shaped portions 321a and 21b of the tube 301, respectively. Thereby, the power supply board 305 and the control board 306 can be efficiently arranged in the space between the both ends of the LED board 303 and the bottom part 322a of the cap 302a and the bottom part 322b of the cap 302b. Further, since the power supply board 305 and the control board 306 can be covered by both the tube 301 and the

caps

302a and 302b, the power supply board 305 and the control board 306 can be reliably protected from external impacts.

In the third embodiment, as described above, the LED substrate 303 is supported, the heat sink 304 that dissipates the heat of the LED element 303a is further provided, and the heat sink 304 is formed hollow along the tube axis direction, The substrate 305 and the control substrate 306 are connected to each other via wirings 132a and 132b arranged in the internal space of the heat sink 304 formed in a hollow shape. As a result, even in the configuration in which the power supply board 305 and the control board 306 are arranged on both sides of the LED board 303, the

wirings

132a and 132b that connect each other are arranged in the internal space 304a of the heat sink 304, The light emitted from 303a can be prevented from being blocked.

In the third embodiment, as described above, one is disposed in each of the space in the tube axis direction between the heat sink 304 and the bottom portion 322a of the cap 302a and the bottom portion 322b of the cap 302b on both sides in the tube axis direction of the heat sink 304. A spacer member 307 is further provided, and the power supply substrate 305 and the control substrate 306 are arranged at positions corresponding to the spacer member 307, respectively. Thereby, the power supply substrate 305 and the control substrate 306 can be easily arranged on the spacer member 307 between the heat sink 304 secured by the spacer member 307 and the bottom portion 322a of the cap 302a and the bottom portion 322b of the cap 302b.

In the third embodiment, as described above, the

caps

302a and 302b are formed of an opaque resin. As a result, the power supply board 305 and the control board 306 are covered with the tube-shaped part 321a of the cap 302a and the tube-shaped part 321b of the cap 302b formed of an opaque resin so that the power supply board 305 and the control board 306 cannot be seen by the user. Can be.

In the third embodiment, as described above, the seal 111 is affixed in the vicinity of the region covered with the

caps

302a and 302b of the tube 301 in a state where both ends of the tube 301 are closed by the

caps

302a and 302b. Thereby, even if the

wirings

132a and 132b connected to the power supply board 305 and the control board 306 in the area covered with the

caps

302a and 302b protrude from the area covered with the

caps

302a and 302b, the seal 111 can hide them.

For example, in the third embodiment, the LED element is shown as an example of the light emitting element of the present invention, but the present invention is not limited to this. In the present invention, for example, a light emitting element other than an LED element such as a semiconductor laser element may be used.

In the third embodiment, the example in which the power supply board and the control board are arranged outside the both end portions of the heat sink is shown, but the present invention is not limited to this. In the present invention, if the power supply board and the control board are arranged outside the both end portions of the element substrate, the power supply board and the control board may be arranged at a position corresponding to a part of the heat sink.

In the third embodiment, an example in which a cap into which a tube (tubular body) is inserted is provided in the tubular shape portion, but the present invention is not limited to this. In the present invention, a cap-like cap that is fitted into the opening of the tube may be provided.

In the third embodiment, an example is shown in which one spacer member is disposed in the space in the tube axis direction between the heat sink and the bottom of the pair of caps. However, the present invention is limited to this. Absent. In the present invention, as shown in FIG. 28, the spacer member need not be arranged in the space in the tube axis direction between the heat sink and the bottom of the pair of caps. In this case, the heat sink may be fixedly attached to the inner surface of the tube body with an adhesive or the like.

1, 201, 301 Tube (Tube)
3, 203, 303 LED substrate (element substrate)
3a, 203a, 303a LED element (light emitting element)
4, 204, 304

Heat sink

12a, 212a Inner surface 41 Flat portion 42 Arc-shaped portion

42a Outer surface

100, 200, 300 Straight tube type LED lighting device (lighting device)

111 Seal

121, 121a Rib (projection)
132a, 132b wiring 202 cap (first cap, second cap)
205 Power supply board (circuit board)
205a, 206a Electronic component 206 Control board (circuit board)
207 Spacer member (first spacer member, second spacer member)

207a Outer surface

302a, 302b Cap 304a Internal space 305 Power supply board 306 Control board 307 Spacer member 311

Top part

321a, 321b

Tubular shape part

322a,

322b Bottom part

324a, 324b Terminal 411 Rib (board positioning part)
421 Groove (adhesive escape groove)

Claims

An element substrate (3) on which the light emitting element (3a) is mounted;
A heat sink (4) for supporting the element substrate and dissipating heat of the light emitting element;
A tubular body (1) formed in a cylindrical shape and containing the heat sink therein;
A protrusion (121) protruding inward from the inner surface (12a) of the tubular body,
A lighting device (100) configured to restrict movement of the heat sink from a predetermined arrangement position by the protrusion.
The protrusion includes a pair of ribs (121) disposed at substantially the same height as viewed from the tube axis direction and formed to extend in the tube axis direction,
The lighting device according to claim 1, wherein the pair of ribs is configured to function as a guide when the heat sink is inserted into the tubular body.
The lighting device according to claim 2, wherein the pair of ribs are formed so as to extend from one end to the other end of the tubular body.
The heat sink is a circle having a flat portion (41) having a portion on which the element substrate is placed, and an outer surface (42a) having substantially the same curvature as the inner surface of the tube body as viewed from the tube axis direction of the tube body. An arcuate portion (42), and the arcuate portion abuts against the inner surface of the tubular body and the flat portion abuts against the pair of ribs, thereby restricting movement from the predetermined arrangement position. The lighting device according to claim 2, wherein the lighting device is configured as described above.
The lighting device according to claim 4, wherein the upper surfaces of the pair of ribs are disposed at substantially the same height as the light emitting element mounting surface of the element substrate placed on the flat portion of the heat sink.
The flat portion of the heat sink is provided with a substrate positioning portion (411) of the element substrate placed on the flat portion of the heat sink,
The lighting device according to claim 4, wherein the substrate positioning portion is formed so that a protruding amount from the flat portion is smaller than a plate thickness of the element substrate.
The heat sink is configured to be fixed to the tube by an adhesive applied between an outer surface of the arcuate portion and an inner surface of the tube.
The lighting device according to claim 4, wherein an adhesive relief groove (421) extending in the tube axis direction is formed on an outer surface of the arc-shaped portion.
The tubular body is made of a resin material,
The lighting device according to claim 2, wherein the pair of ribs are integrally formed on an inner surface of the tubular body.
An element substrate (203) on which the light emitting element (203a) is mounted;
A heat sink (204) for supporting the element substrate and dissipating heat of the light emitting element;
A tubular body (201) formed in a cylindrical shape and containing the heat sink therein;
A bottomed tube-shaped cap (202) attached to an end of the tube and including a terminal;
A spacer member disposed in a gap in the tube axis direction between the heat sink and the cap in a state where the heat sink is housed inside the tube and the cap is attached to an end of the tube. (207). A lighting device (200).
The lighting device according to claim 9, wherein the spacer member has an outer surface (207a) having substantially the same curvature as the inner surface of the tubular body.
The lighting device according to claim 10, wherein a circuit board (205) on which an electronic component (205a) is mounted is disposed at a position corresponding to the spacer member inside the tubular body.
The cap includes a first cap (202) attached to one end portion in the tube axis direction of the tube body, and a second cap (202) attached to the other end portion in the tube axis direction of the tube body,
The spacer member includes a first spacer member (207) disposed in a gap in the tube axis direction between one end of the heat sink in the tube axis direction and the first cap, and the tube shaft of the heat sink. The lighting device according to claim 9, further comprising: a second spacer member (207) disposed in a gap in the tube axis direction between the other end in the direction and the second cap.
The inner surface (212a) of the tube body is provided with a protrusion (121a) that protrudes toward the inside of the tube body and restricts the movement of the heat sink,
The lighting device according to claim 9, wherein the protrusion is configured to restrict movement of the spacer member together with the heat sink.
The protrusion is formed to extend in the tube axis direction, and is configured to function as a guide when the heat sink and the spacer member are inserted into the tube. The lighting device described in 1.
An element substrate (303) on which the light emitting element (303a) is mounted;
A power supply substrate (305) for converting AC power into DC power;
A control board (306) for controlling the voltage of the DC power and supplying it to the element board;
A tubular body (301) which is formed in a cylindrical shape and houses the element substrate, the power supply substrate and the control substrate therein;
The lighting device (300), wherein the element substrate is disposed between the power supply substrate and the control substrate.
A pair of caps (302a, 302b) having a bottomed tube shape including terminals (324a, 324b) for supplying AC power and closing both ends of the tube body;
The cap is inserted with an end of the tubular body,
The lighting device according to claim 15, wherein the power supply board and the control board are each disposed in a region covered with a tube-shaped portion of the cap of the tube body.
A heat sink (304) for supporting the element substrate and dissipating heat of the light emitting element;
The heat sink is formed hollow along the tube axis direction,
The lighting device according to claim 16, wherein the power supply board and the control board are connected to each other via wirings (132a, 132b) arranged in an internal space (304a) of the heat sink formed in a hollow shape.
Spacer members (307) are disposed on the both sides of the heat sink in the tube axis direction, and are respectively disposed in the space in the tube axis direction between the heat sink and the bottom portions (322a, 322b) of the pair of caps. ,
The lighting device according to claim 17, wherein each of the power supply board and the control board is disposed at a position corresponding to the spacer member.
The lighting device according to claim 16, wherein the cap is formed of an opaque resin.
The lighting device according to claim 16, wherein a seal (111) is attached in the vicinity of a region of the tubular body covered by the cap in a state where both ends of the tubular body are closed by the cap.