JP6056474B2 - Light emitting device - Google Patents

Description

  The present invention relates to a light emitting device in which a long substrate provided with a plurality of light emitting units is accommodated in a straight tube, for example.

  Conventionally, a light emitting device (straight tube type) in which a large number of light emitting elements (LEDs) are mounted on a long flexible substrate, the flexible substrate is accommodated in a straight tube, and formed into a shape corresponding to a straight tube type fluorescent lamp ( (Lighting device) is known (for example, see Patent Document 1).

  The light emitting device described in Patent Document 1 has a straight tube formed in a cylindrical shape with a cover and an aluminum base. A substrate on which a large number of LEDs (LED modules) are provided in a row is screwed to an aluminum base with a plastic screw with a heat conductive sheet interposed therebetween. At both ends of the substrate, cap-shaped case terminals are fitted and held together with a cover and an aluminum base.

JP2011-159391A (FIGS. 1 and 2)

  The conventional straight tube type light emitting device as described in Patent Document 1 uses a plastic screw to fix the substrate to a straight tube such as an aluminum base. For this reason, the conventional straight tube type light emitting device requires a drilling operation for forming a plurality of screw holes in a substrate or an aluminum base, and a plurality of screw members (plastic screws). However, there is a problem that the number of man-hours for assembling work increases and the cost increases.

  Then, an object of this invention is to provide the light-emitting device which can reduce | assemble the number of parts and the work man-hour of an assembly work, and can be assembled | attached easily.

  In order to solve the above-described problems, a light-emitting device according to the present invention includes a substrate that is a long flexible wiring substrate, a plurality of light-emitting portions that are arranged in the longitudinal direction on the substrate, and a straight tube that houses the substrate. A cap provided at an open end of the straight pipe, wherein the straight pipe is formed on a pedestal portion on which the substrate is placed and on the lower side of the pedestal portion, and the cap An engagement portion with which a first protrusion protruding from the inner wall is engaged, and the substrate has a folded portion that is folded and inserted into the engagement portion at an end portion in a longitudinal direction, The folded portion inserted into the engaging portion is held by engaging the first protrusion with the engaging portion.

  According to such a configuration, the light-emitting device has a folded portion in which a substrate, which is a flexible wiring board in which light-emitting portions are arranged in parallel in the longitudinal direction, is folded and disposed in the engaging portion of the straight pipe at an end portion in the longitudinal direction. In the light emitting device, the folded portion can be held by the straight pipe and the cap by engaging the first protrusion of the cap with the engaging portion in a state where the folded portion is inserted into the engaging portion. For this reason, the light emitting device can be fixed to the straight tube in a state where the substrate is stretched by inserting the first protrusion of the cap into the engaging portion of the straight tube into which the folded portion is inserted.

  The light emitting device according to the present invention can be easily assembled with a small number of parts and an assembling man-hour.

It is a schematic plan view which has a partial cross section which shows the light-emitting device which concerns on embodiment of this invention. It is a principal part expansion schematic perspective view which shows the opening edge part of a straight pipe. It is a principal part expansion schematic exploded perspective view which shows the opening edge part of a straight pipe | tube, a folding | returning part in a board | substrate, and a cap. FIG. 3 is an enlarged schematic exploded perspective view of a main part of an opening end of a straight pipe and a cap showing an assembled state of a folded portion of a substrate. It is a principal part expansion schematic perspective view which has a cross section which shows the internal structure of the edge part of a light-emitting device. It is a schematic exploded perspective view showing the assembly procedure of the light emitting device, (a) is a diagram showing a state when the substrate is inserted into the straight tube, (b) is a diagram showing a state when the substrate is inserted into the straight tube, (C) is a figure which shows a state when the folding | returning part of a board | substrate is bent, (d) is a figure which shows a state when fitting a cap to a straight pipe | tube.

Hereinafter, a light emitting device according to an embodiment of the present invention will be described with reference to FIGS.
However, the embodiment described below exemplifies the light emitting device 1 for embodying the technical idea of the present invention, and the dimensions, materials, shapes, and relative positions of the components described in the embodiment are described. Arrangement and the like are merely illustrative examples, and are not intended to limit the scope of the present invention unless otherwise specified. Note that the size, thickness, positional relationship, and the like of the members shown in each drawing are exaggerated in part for clarity of explanation. In the description of the embodiment, each member is formed in a substantially symmetrical shape around the central portion in the longitudinal direction and the short side direction in the light emitting device 1. Will be omitted as appropriate.

≪Configuration of light emitting device≫
As shown in FIG. 1, the light-emitting device 1 is a device that emits light from the light-emitting elements 30 (see FIG. 5) of each light-emitting unit 3 when current is supplied. The light emitting device 1 can be used as, for example, a straight tube type LED lighting device. The light emitting device 1 includes a substrate 2 that is a long flexible wiring substrate, a plurality of light emitting units 3 that are arranged in the longitudinal direction on the substrate 2, a straight tube 4 that houses the substrate 2, and the straight tube 4. And caps 5 provided at the open ends 4a on both sides.
The light emitting device 1 is detachably attached to the lighting device body by, for example, mounting the cap pins 51 provided on the caps 5 on both sides of the straight tube 4 to the socket portion of the lighting device body (not shown).

<< Substrate structure >>
As shown in FIG. 1, the substrate 2 is formed of a long rectangular flexible wiring board that is horizontally disposed along the straight pipe inner wall 4 b in the central portion of the straight pipe 4 as viewed in a longitudinal section (see FIG. 1). 4 and FIG. 5). The board | substrate 2 is formed in the thin-plate-shaped flexible insulating base material, for example with a polyimide, polyester, etc. The substrate 2 has a wiring pattern formed thereon, an element installation part 2d on which a plurality of light emitting parts 3 and the like are provided, a folded part 2b (see FIG. 3) formed on both sides of the element installation part 2d, have.

  As shown in FIGS. 3 and 4, the substrate 2 is supported by inserting the end portions 2a on both sides in the short direction into the substrate support portion 4c so as to be able to advance and retreat, and the entire element installation portion 2d is on the pedestal portion 4e. Placed on. In the substrate 2, the folded portions 2b on the end portions 2c side on both sides in the longitudinal direction are folded downward and inserted into the engaging portion 4d, and the first protrusion 5b of the cap 5 is fitted inside the engaging portion 4d. Thus, the folded portion 2b is held and fixed in the straight pipe 4 (see FIG. 5).

  As shown in FIG. 1, the element installation portion 2 d has a wiring pattern (not shown) formed on the surface, and each of the light emitting portions 3 is preset in the longitudinal direction of the straight tube 4 at a predetermined position of the wiring pattern. It is installed in a row at an appropriate interval.

The wiring pattern (not shown) includes a mounting part (not shown) on which the light emitting part 3 and the like are mounted, and a wire connecting part on which an electric wire (not shown) for supplying power to the light emitting part 3 is arranged. The one end of the electric wire is formed and connected to the electric wire connecting portion, and the other end of the electric wire is connected to the cap pin 51 provided on the cap 5.
The substrate 2 may be provided with a resist that covers a part of the wiring pattern and reflects light.

  As shown in FIG. 4, the folded portion 2 b is a portion that is formed on both ends 2 c side of the substrate 2 in the longitudinal direction and is folded downward to be U-shaped and inserted into the engaging portion 4 d. . The substrate 2 is formed such that the folded portion 2b protrudes outward from the pedestal portion 4e when the element installation portion 2d is placed on the pedestal portion 4e. As shown in FIG. 5, the length in the longitudinal direction of the folded portion 2 b is, for example, longer than the protruding length of the first protrusion 5 b of the cap 5. The folded portion 2b provided by fitting the cap 5 to the straight pipe 4 is sandwiched between the lower surface of the pedestal portion 4e and the upper surface of the first protrusion 5b. Further, in order to make the folded portion 2b easier to fold, the substrate 2 has a wiring pattern that is partially or entirely less or less than the wiring pattern of the element installation portion 2d in the folded portion 2b. Also good.

≪Configuration of light emitting part≫
As shown in FIG. 5, the light emitting unit 3 is an LED module provided on the substrate 2 in a line at a predetermined interval in the longitudinal direction. The light emitting unit 3 includes, for example, a light emitting element 30 and a phosphor-containing resin 31 provided so as to cover the light emitting element 30.
The light emitting element 30 is a light emitting body composed of, for example, an LED chip that emits light made of a gallium nitride-based compound semiconductor, and is fixed on the wiring pattern of the substrate 2 by a die bond member or the like.
The phosphor-containing resin 31 is a resin for adjusting the light color and emitting light by using the phosphor contained therein.

≪Straight pipe construction≫
The straight pipe 4 is a housing that houses the substrate 2 and is formed of, for example, a transparent insulating resin. The straight pipe 4 includes a substantially cylindrical case body 4k having open end portions 4a at both ends in the longitudinal direction, a pedestal part 4e disposed horizontally with respect to the straight pipe inner wall 4b of the case body 4k, and a short of the pedestal part 4e. A substrate support portion 4c formed on both ends in the hand direction, an engagement portion 4d formed on the lower side of the pedestal portion 4e, a lower hollow portion 4j formed on the lower side of the engagement portion 4d, It has mainly.

  As shown in FIG. 2, the pedestal portion 4 e is a portion on which the substrate 2 (see FIG. 4) is placed and supports the substrate from the lower side. The pedestal portion 4e is composed of a flat plate-like portion that is integrally formed horizontally on the upper portion between a pair of left and right support columns 4h that extend from the left and right sides of the straight pipe inner wall 4b downward. The pedestal portion 4e is formed slightly larger than the size of the element installation portion 2d of the substrate 2 in plan view (see FIG. 1).

  As shown in FIG. 3, the board | substrate support part 4c is a site | part which supports the edge part 2a of the both sides of the transversal direction of the board | substrate 2 mounted in the base part 4e. The substrate support portion 4c is formed to protrude upward on both sides of the pedestal portion 4e in the short direction, and extends in the longitudinal direction along the straight pipe inner wall 4b. The substrate support portion 4c includes raised portions 4i and 4i formed by raising both ends in the short direction of the pedestal portion 4e, and folded portions formed with the distal ends of the raised portions 4i and 4i facing the straight pipe 4 inside. And 4f, 4f. For this reason, the substrate support portion 4c is formed by the base portion 4e, the upright portions 4i and 4i, and the bent portions 4f and 4f so as to form recesses into which the end portions 2a on both sides in the short direction of the substrate 2 are inserted. 2 is restrained from moving in the short direction, and performs a guide function when the substrate 2 is inserted into the straight pipe 4 and installed.

The upright portion 4i is a plate-like portion that is erected vertically from both ends in the short direction of the pedestal portion 4e to form the side wall of the substrate support portion 4c. Since this upright part 4i is formed with resin of predetermined thickness, it has elasticity in a transversal direction (left-right direction).
The bent portion 4f is a flat plate-like portion formed by being bent horizontally at a right angle from the upper end of the raised portion 4i toward the inside. Since the bent portion 4f is made of a resin having a predetermined thickness, it has elasticity in the vertical direction.

The engaging portion 4 d is for inserting the folded portion 2 b of the substrate 2 and engaging with the first protrusion 5 b of the cap 5. The engaging portion 4d is formed so as to face the back surface of the pedestal portion 4e, the left and right support columns 4h and 4h that support the pedestal portion 4e on the straight pipe inner wall 4b, and the back surface of the pedestal portion 4e from the straight pipe inner wall 4b. The left and right protrusion support portions 4g, 4g form a space that is a substantially rectangular hollow portion when viewed in a longitudinal section. 4 d of engaging parts are extended in the longitudinal direction along the straight pipe inner wall 4b, and are formed ranging from the one opening end part 4a of the straight pipe 4 to the other opening end part 4a.
Here, “engagement” means that the engaging portion 4d and the folded portion 2b of the substrate 2 that is the engaged portion are connected to each other, and partly in contact with each other. As long as it is in a state, it does not have to be in a state of being fitted to each other.

The back surface of the pedestal portion 4e is the lower surface of the pedestal portion 4e, and here is a flat surface that forms the ceiling surface of the engagement portion 4d.
The column portions 4h, 4h are base portions that are continuous with the upright portions 4i, 4i here, and are vertically erected upward from the straight pipe inner walls 4b on the left and right sides of the molded base portions of the protrusion support portions 4g, 4g. It is a flat part and forms the left and right side walls of the engaging portion 4d.

  The protrusion support portions 4g and 4g are formed of two support pieces formed so as to protrude from the mutually opposing portions of the straight pipe inner wall 4b, and elastically support the lower surface of the first protrusion 5b from below. It is. The protrusion support portions 4g and 4g are formed in parallel with the back surface of the pedestal portion 4e from the left and right below the straight pipe inner wall 4b toward the inside. The protrusion support portions 4g and 4g are flat plate-like support pieces formed in a cantilever shape on the straight pipe inner wall 4b, and have elasticity in the vertical direction because they are formed of a resin having a predetermined thickness. .

  The lower hollow portion 4j is a hollow portion formed between the protrusion support portions 4g and 4g and the bottom portion of the straight pipe inner wall 4b. The protrusion support parts 4g and 4g are elastic in the vertical direction by forming a lower hollow part 4j below the protrusion support parts 4g and 4g. The protrusion support portions 4g and 4g have a central side opening in the straight pipe inner wall 4b, thereby expanding the space from the back surface of the pedestal portion 4e to the lower hollow portion 4j. Therefore, the heat generation from the substrate 2 can be released to the space from the back surface of the pedestal 4e.

≪Cap configuration≫
As shown in FIG. 4, the cap 5 is made of a bottomed cylindrical insulating member that is externally fitted to the open ends 4 a on both sides of the straight pipe 4, and is made of, for example, an opaque insulating resin. The cap 5 is provided with a pair of cap pins 51 projecting from end faces on both sides in the longitudinal direction of the straight pipe 4. The cap 5 includes an inner wall 5a that closes the open end 4a of the straight pipe 4, a first protrusion 5b that is formed to project from the lower portion of the inner wall 5a toward the straight pipe 4, and a straight pipe 4 side from the outer edge of the inner wall 5a. An annular portion 5c that protrudes toward the straight line 5 and a second protrusion 5d that protrudes from the upper portion of the inner wall 5a toward the straight pipe 4 are integrally formed.
When the cap 5 is electrically connected to the cap pin 51, the wiring pattern may be formed inside from the upper surface of the first protrusion 5b. In this case, the connection portion (not shown) of the wiring pattern on the substrate 2 is brought into contact with and electrically connected to the connection portion of the wiring pattern on the first protrusion 5b.

As shown in FIG. 1, the cap pin 51 functions as a power supply terminal for connecting a power source and as a mounting pin for mounting the light emitting device 1 to a device body of an LED lighting device (not shown). When the base pin 51 is used, there are several usage methods depending on the power supply type of the light emitting device 1. For example, when the light-emitting device 1 is fed from an alternating current circuit, the base pin 51 has a method of using two left and right pins, a method of using one pin on each of the left and right sides, and two of the left and right sides. There is a method of using a book pin. In addition, when the light-emitting device 1 is fed from a DC power source, the base pin 51 has a method of using one of the left and right pins and the other two using either the left or right two pins. There is a method of using it as a dummy terminal.
Further, the connection between the substrate 2 and the power source may be a connection method using an electrical connection connector provided on the electric wire connected to the substrate 2 without using the cap pin 51.

As shown in FIG. 4, the inner wall 5a is a part that forms the bottom plate of the cap 5, and is formed in a disc shape. A pin installation part (not shown) for holding the cap pin 51 is formed on the inner wall 5a.
The first protrusion 5b is a protrusion for fixing the folded portion 2b to the straight pipe 4 by press-fitting the first protrusion 5b into the engaging portion 4d in which the folded portion 2b of the substrate 2 is inserted. The first protrusion 5b is formed in a substantially quadrangular shape as viewed in a longitudinal section in accordance with the shape of the engaging portion 4d. The first protrusion 5b is integrally formed to project from the inner wall of the annular portion 5c toward the engaging portion 4d via the second gap S2.

The annular portion 5 c is a portion formed in an annular shape that is fitted so as to cover the outer peripheral end portion of the straight pipe 4.
5 d of 2nd protrusions are arrange | positioned through the 1st clearance gap S1 in the cyclic | annular part 5c, and consist of protrusions of circular arc shape seen in the longitudinal cross section formed so that the inner peripheral edge part of the straight pipe 4 may be opposed.

The first gap S1 is a groove-like space formed between the annular portion 5c and the second protrusion 5d as viewed in the longitudinal section, and the upper portion of the open end portion 4a of the straight pipe 4 is inserted and held. It is a part to be done.
The second gap S2 is a groove-like space formed between the annular portion 5c and the first protrusion 5b in a longitudinal cross-sectional view, and is a lower part of the open end 4a of the straight pipe 4, and a protrusion support part. 4g and the support | pillar part 4h are the site | parts inserted and hold | maintained.
Note that the relationship between the engaging portion 4d and the first protrusion 5b is that even when the folded portion 2b is inserted into the engaging portion 4d, the protrusion supporting portions 4g and 4g are elastically deformed downward, and the cap 5 is connected to the straight pipe 4 Can be fitted to.

[Operation of light emitting device]
Next, based on FIGS. 6A to 6D, the operation of the light emitting device 1 according to the embodiment of the present invention will be described together with the assembling procedure with reference to FIGS.
First, as shown in FIG. 1, a substrate 2, a straight pipe 4, and a pair of caps 5 are manufactured. At this time, since the straight pipe 4 has a uniform cross-sectional shape in the longitudinal direction, it can be continuously manufactured by extrusion molding.

When assembling them, first, as shown in FIG. 6A, the substrate 2 is placed on the pedestal portion 4e, and the ends 2a on both sides in the short direction of the substrate 2 are supported on the left and right substrates of the straight tube 4. Insert between the parts 4c.
As shown in FIG. 6 (b), in this case, the long substrate 2 has end portions 2a on both sides in the short direction, a pedestal portion 4e (see FIG. 6 (a)), an upright portion 4i, and a bent portion 4f. Since the movement in the width direction is regulated and guided, the insertion into the straight pipe 4 can be smoothly performed.

As shown in FIG. 6C, thereafter, the folded portions 2b of the end portions 2c on both sides in the longitudinal direction of the substrate 2 are bent downward in a U shape and inserted into the engaging portions 4d.
As shown in FIG. 6 (d), the first protrusion 5 b of the cap 5 is further press-fitted into the engaging portion 4 d and the annular portion 5 c is externally fitted to the outer peripheral end portion of the straight pipe 4.
Then, the folded portion 2 b is held by the engaging portion 4 d and the first protrusion 5 b, and the substrate 2 is fixed in the straight tube 4 and the cap 5. Therefore, the folded portion 2b at both ends in the longitudinal direction of the substrate 2 is held by the engaging portion 4d and the first protrusion 5b, and movement in the short direction is restricted by the left and right substrate support portions 4c. Even without a fixture or adhesive, the substrate 2 can be firmly fixed in the straight pipe 4 in a tensioned state.

  The folded portion 2b is inserted into the engaging portion 4d by bending the end portions 2c on both sides in the longitudinal direction of the substrate 2 into a U shape, and the first protrusion 5b is forcibly engaged with the engaging portion 4d. The first protrusion 5b is supported in the engaging portion 4d without rattling while being pressed from below onto the upper surface side of the first protrusion 5b by the elastic force of the protrusion support portions 4g and 4g.

Further, the protrusion support portion 4g forming the lower surface of the engagement portion 4d is a support plate piece formed in a cantilever shape protruding from the straight pipe inner wall 4b. Since the protrusion 5b can be elastically supported, the folded portion 2b and the first protrusion 5b can be supported from the lower side without rattling.
The cap 5 is fixed to the straight pipe 4 by inserting the upper and lower portions of the open end 4a of the straight pipe 4 into the first gap S1 and the second gap S2.

In this way, the light emitting device 1 is assembled as shown in FIG. 1, and the assembling work is completed.
Since the board | substrate 2 has the folding | returning part 2b, since the folding | turning part 2b can be supported by the straight pipe 4 and the cap 5, it can be made to fix to the straight pipe 4 without a fixture or adhesive agent. it can.
Therefore, the light emitting device 1 can reduce the number of parts, the number of assembly work, the number of parts management, the time for drying the adhesive, and the like, thereby improving the work efficiency and mass productivity and reducing the cost. Can do.

And if the base pin 51 of the edge part 2c of the longitudinal direction both sides of the light-emitting device 1 is attached to a illuminating device main body not shown and connected to a socket part and a power switch is turned ON, each light-emitting part 3 will light-emit. Become. The light emitting device 1 can be used as an LED lighting device having a shape corresponding to a straight tube fluorescent lamp by arranging a plurality of light emitting units 3 in a line.
Moreover, when the heat | fever by light emission generate | occur | produces from the board | substrate 2, the heat can be released by the lower hollow part 4j below the base part 4e.

[Modification]
The present invention is not limited to the above-described embodiment, and various modifications and changes can be made within the scope of the technical idea. The present invention extends to these modifications and changes. Of course.

For example, in the above-described embodiment, as an example of the straight pipe 4, a left-right symmetric shape has been described as an example, but a left-right asymmetric shape may be used.
For example, the board | substrate support part 4c should just be formed in the one side of the transversal direction of the base part 4e, and should support the edge part 2a of the transversal direction of the board | substrate 2.
Further, the upright portion 4i may be formed by raising at least one end of the pedestal portion 4e in the short direction.
Moreover, the bending part 4f should just be continuously formed in the standing part 4i formed in the one end side of a transversal direction.
Thus, even if the straight pipe 4 forms the substrate support portion 4c, the upright portion 4i, and the bent portion 4f only on one end side in the short direction, the short end portion 2a of the substrate 2 is formed with them. It can be supported by the straight pipe inner wall 4b.

  Moreover, although the case where the whole was formed with transparent resin was demonstrated as an example of the straight pipe 4, the straight pipe 4 should just be formed in the site | part above the board | substrate 2 transparent, and it may change suitably. I do not care. For example, the straight pipe 4 has a lower half body made of an opaque resin or a material excellent in heat dissipation and heat conductivity on the lower side where the pedestal portion 4e, the substrate support portion 4c, the engagement portion 4d and the like are disposed. The upper half that matches the lower half may be formed of a transparent resin or glass to form two colors with a plurality of members.

  In addition, as an example of the straight tube 4, a cylindrical shape corresponding to a straight tube type fluorescent lamp has been described as an example, but the straight tube 4 includes a pedestal portion 4 e and a substrate support portion 4 c that support the substrate 2. As long as the engaging portion 4d with which the folded portion 2b and the first protrusion 5b are engaged is formed, the shape may be changed as appropriate. The straight pipe 4 may be appropriately changed to a shape such as a polygonal shape such as a quadrangular shape, a hexagonal shape, an octagonal shape, or an oval shape when viewed in a longitudinal section.

In the said embodiment, although the light-emitting device 1 was demonstrated taking the case where the light emission part 3 was arrange | positioned in the longitudinal direction of the rectangular-shaped board | substrate 2 as an example, the light-emitting device 1 is not limited to this. In the light emitting device 1, for example, a plurality of light emitting units 3 may be arranged in a plurality of rows in the longitudinal direction as one set in which a plurality of light emitting units 3 are arranged in a row in the longitudinal direction of the rectangular substrate 2.
If it does in this way, the light-emitting device 1 which can illuminate still more brightly can be provided.

  Moreover, although the light emission part 3 of the light-emitting device 1 demonstrated the case where an LED chip was provided as the light emitting element 30, what is necessary is just what emits light, for example, it may be an LD chip.

  In the above embodiment, the case where one substrate 2 is accommodated in one straight tube 4 has been described as an example. However, a plurality of substrates 2 can be accommodated in one straight tube 4. . For example, two substrates 2 are accommodated in one straight tube 4 with the surfaces on which the light emitting portions 3 are provided facing in opposite directions, and the folded portions 2b of the two substrates are connected to the cap second It can also be fixed to the straight pipe 4 collectively by one protrusion 5b. In this case, the folded portions 2b of the two substrates are preferably folded toward the inside of the straight tube 4.

DESCRIPTION OF SYMBOLS 1 Light-emitting device 2 Substrate 2a End part 2b Folding part 2c End part 3 Light-emitting part 4 Straight pipe 4a Opening end part 4b Straight pipe inner wall 4c Substrate support part 4d Engagement part 4e Base part 4f Bending part 4g Projection support Part 4h Supporting part 4i Upright part 5 Cap 5a Inner wall 5b 1st protrusion 5c Annular part 5d 2nd protrusion

Claims (5)

A substrate which is a long flexible wiring board, a light emitting unit provided with a plurality of side by side in the longitudinal direction on the substrate, a straight pipe for accommodating the substrate, a pair respectively provided on both sides of the open end of the straight pipe a light emitting device including a cap, a,
The straight pipe includes a pedestal portion on which the substrate is placed;
Wherein formed on the lower side of the base portion includes an engaging portion in which the first protrusions are respectively engaged with the protruded from the inner wall of each of said cap, and
The substrate has folded portions that are folded and inserted into the engaging portions at both ends in the longitudinal direction,
Each of the folded portion of the longitudinal opposite ends are inserted bent respectively in the engaging portion from the said base portion of said substrate by said first protrusion be respectively engaged into the engaging portion A light-emitting device that is held. The engaging portion includes a back surface of the pedestal portion,
A column portion that supports the pedestal portion on the inner wall of the straight pipe;
Wherein a protrusion support portion formed so as to face the back surface of the base portion from the straight tube wall, is formed from,
The light emitting device according to claim 1 , wherein a lower hollow portion is formed between the protrusion support portion and a bottom portion of the straight pipe inner wall . 3. The light emitting device according to claim 2, wherein the protrusion support portion includes two support pieces that are formed to protrude in a cantilever shape in a direction approaching each other from mutually facing portions of the straight pipe inner wall. . The cap has an annular portion that covers an outer peripheral end portion of the straight pipe;
A second protrusion disposed on the annular portion via a first gap and formed to face an inner peripheral end of the straight pipe;
The light-emitting device according to claim 1, wherein the light-emitting device includes: The straight pipe is formed on at least one side of the pedestal portion in the short direction, and has a substrate support portion that supports an end portion of the substrate in the short direction,
The substrate support portion supports an end portion in the short direction of the substrate placed on the pedestal portion, and at least an upright portion formed by raising one end in the short direction of the pedestal portion; and
A bent portion formed with the leading end side of the upright portion facing the inside of the straight pipe;
5. The light emitting device according to claim 1, wherein the light emitting device is provided.

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