JP2018186023A - Luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a luminaire capable of suppressing occurrence of electric conduction failure due to positional deviation between a substrate on which a light-emitting element is mounted, and a substrate on which a power source circuit is mounted.SOLUTION: A luminaire includes: an LED substrate 3 on which an LED 31 is mounted, the LED substrate 3 provided movably; a power source substrate 5 on which a power source circuit 51 for driving the LED 31 is mounted; a connection part 6 electrically connecting the LED 31 and the power source circuit 51, the connection part 6 attached to each of the LED substrate 3 and power source substrate 5; and a regulation part 7 configured to regulate an interval between the LED substrate 3 and the power source substrate 5 within a predetermined range.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a lighting device including a substrate on which a light emitting element is mounted.

  2. Description of the Related Art In recent years, lighting devices that use a light emitting element such as a light emitting diode (LED) as a light source and have a low power consumption and a long lifetime have become widespread. Such an illuminating device basically has a configuration in which a substrate on which a plurality of light emitting elements are mounted at predetermined intervals is stored in the illuminating device main body.

  In the conventional lighting device, in order to suppress the influence when the substrate thermally expands due to light emission of the light emitting element mounted on the substrate, for example, as described in Patent Document 1, a substrate on which the light emitting element is mounted is used. The power supply circuit for driving the light emitting element is configured to be movable at a distance from the substrate on which the power supply circuit is mounted, and a lead wire for electrically connecting the light emitting element and the power supply circuit is provided. For example, it can be attached to each substrate by soldering or the like.

International Publication No. 2014/049952

  In the conventional lighting device, since the substrate on which the light emitting element is mounted is movably provided, the substrate is separated from or closer to the substrate on which the power supply circuit is mounted, for example, due to vibration generated during transportation of the lighting device. When the substrate is moved (displaced), the lead wire may be cut by the movement of the substrate, or the lead wire may be disconnected from any of the substrates.

  The present invention has been made in view of the above-described problems, and it is possible to suppress the occurrence of a conductive failure due to a positional shift between a substrate on which a light emitting element is mounted and a substrate on which a power supply circuit is mounted. An object is to provide a lighting device.

  In order to achieve the above object, the present invention provides a first substrate on which a light emitting element is mounted, the first substrate being movably provided, and a power supply circuit for driving the light emitting element. A connection part for electrically connecting the second substrate, the light emitting element and the power supply circuit, the connection part attached to each of the first substrate and the second substrate; the first substrate; Provided is a lighting device including a regulating unit that regulates a distance from a second substrate within a predetermined range (Invention 1).

  According to the said invention (invention 1), since the space | interval of a 1st board | substrate and a 2nd board | substrate is controlled by the control part to the predetermined range, for example, the 1st board | substrate moved to the direction which leaves | separates from the 2nd board | substrate, or the approaching direction. Even in this case, the moving range of the first substrate can be limited to a range in which, for example, the connecting portion is not cut or the connecting portion is not detached from any of the substrates. Therefore, it is possible to suppress the occurrence of a conduction failure due to a positional shift between the substrate on which the light emitting element is mounted and the substrate on which the power supply circuit is mounted.

  In the above invention (Invention 1), the restricting portion may be provided so as to be interposed between the first substrate and the second substrate (Invention 2).

  According to the above invention (invention 2), since the restricting portion is interposed between the first substrate and the second substrate, for example, when the first substrate moves in a direction approaching the second substrate, the first substrate It can be easily suppressed that the distance between the substrate and the second substrate is less than the minimum value in the predetermined range.

  In the above invention (Invention 2), when the power supply circuit is mounted on the first surface of the second substrate, the regulating portion includes a side surface on the second substrate side among the side surfaces of the first substrate, It may be formed so as to cover the surface of the first substrate and the second substrate side of the surface on the first surface side (Invention 3).

  According to the above invention (Invention 3), the side surface on the second substrate side among the side surfaces of the first substrate and the second substrate side on the surface on the first surface side among the surfaces of the first substrate are covered by the restricting portion. Therefore, for example, even when the first substrate moves in a direction approaching the second substrate, the regulation unit reliably regulates the first substrate over the regulation unit and contacts the power supply circuit. Can do. Thereby, for example, it is possible to prevent the first substrate from colliding with the power supply circuit and damaging the power supply circuit. For example, it is possible to suppress the occurrence of a short circuit or the like when the restricting portion contacts a conductor such as a power supply circuit, a light emitting element, or a connecting portion.

  In the said invention (invention 2-3), the engaging part which engages with the said control part may be provided in at least one of the said 1st board | substrate and the said 2nd board | substrate (invention 4).

  According to the said invention (invention 4), when a control part engages with an engaging part, it can suppress that a control part remove | deviates from a 1st board | substrate and / or a 2nd board | substrate easily.

  In the said invention (invention 1-4), the said control part may have elasticity (invention 5).

  According to the above invention (invention 5), for example, when the movement of the first substrate is stopped after the restricting portion is elastically deformed with the movement of the first substrate, the elastic deformation of the restricting portion is restored to restore the first substrate. Can be returned to the movement start position side.

  In the said invention (invention 5), the said control part may have a bending part (invention 6).

  According to the said invention (invention 6), the space | interval of a 1st board | substrate and a 2nd board | substrate can be easily controlled to an appropriate range, for example, when a control part expands / contracts based on the elastic deformation of a bending part. . In addition, for example, even when the restricting portion contacts the first substrate or the second substrate and receives an impact, the impact can be mitigated by the bent portion.

  In the said invention (invention 1-6), the said control part may have insulation (invention 7).

  According to the said invention (invention 7), it can suppress that a short circuit etc. generate | occur | produce, for example, when a control part contacts conductors, such as a power supply circuit, a light emitting element, or a connection part.

  In the said invention (invention 7), when the said power supply circuit is mounted in the 1st surface of the said 2nd board | substrate, you may form so that the 2nd surface of the back side of the said 1st surface may be covered (invention 8). ).

  According to the above invention (Invention 8), for example, when a terminal of a component constituting the power supply circuit protrudes from the second surface, a short circuit or the like occurs due to adhesion of a conductive substance or the like to the terminal. Can be suppressed.

  According to the lighting device of the present invention, it is possible to suppress the occurrence of a conduction failure due to a positional shift between a substrate on which a light emitting element is mounted and a substrate on which a power supply circuit is mounted.

It is a schematic block diagram of the illuminating device which concerns on one Embodiment of this invention. It is a disassembled perspective view of an illuminating device. It is a figure for demonstrating an example of the attachment method of the control part with respect to an LED board and a power supply board. It is a top view when a control part is attached to an LED board and a power supply board. (A) is a figure for demonstrating an example of a state with the largest space | interval of an LED board and a power supply board, (b) demonstrates an example of a state with the minimum space | interval of an LED board and a power supply substrate. FIG. It is a figure explaining the modification of an engaging part.

  With reference to FIGS. 1-5, the structure of the illuminating device 100 which concerns on one Embodiment of this invention is demonstrated.

  The lighting device 100 according to this embodiment has a straight tube shape and is configured to be used indoors or outdoors for general lighting. Moreover, the illuminating device 100 is comprised so that it may mount | wear and use for the socket of a lighting fixture (illustration omitted), and is provided with the cover member 1 and the two end members 2, as shown in FIG. . Further, as illustrated in FIG. 2, the lighting device 100 includes an LED substrate 3, a heat sink 4, a power supply substrate 5, a connection portion 6, and a restriction portion 7 inside the cover member 1. The LED substrate 3 is an example of the “first substrate” in the present invention, and the power supply substrate 5 is an example of the “second substrate” in the present invention. Further, the plurality of LEDs 31 (shown in FIG. 3) mounted on the surface of the LED substrate 3 are an example of the “light emitting element” in the present invention.

  As shown in FIG. 2, the cover member 1 is configured to include an LED substrate 3, a heat sink 4, a power supply substrate 5, a connection portion 6, a restriction portion 7, and the like. Further, the cover member 1 is formed in a cylindrical shape (that is, a straight tube shape) extending linearly in the tube axis direction (X direction in the drawing). Further, the cover member 1 includes a diffusion cover 11 and a back cover 12.

  The diffusion cover 11 is configured to diffuse light from the plurality of LEDs 31 and irradiate the light to the outside. Here, the diffusion cover 11 may be formed of a resin having light diffusibility such as polycarbonate. The diffusion cover 11 is disposed on the side irradiated with the light from the LED 31 (upper side in FIG. 2).

  The back cover 12 is disposed on the side opposite to the side irradiated with the light of the LED 31 (the lower side in FIG. 2). The back cover 12 may be formed of, for example, an opaque resin that is colored so that the inside cannot be seen. Further, as shown in FIG. 2, the back cover 12 has a pair of ribs 121 extending in the tube axis direction (X direction in the drawing) of the cover member 1. The pair of ribs 121 are configured to position the heat sink 4 in the Z direction. That is, the heat sink 4 is positioned between the pair of ribs 121 and the inner surface of the back cover 12 so that the heat sink 4 is positioned in the Z direction.

  As shown in FIGS. 1 and 2, the end member 2 is attached and fixed so as to cover the cover member 1 at both ends in the tube axis direction (X direction in the drawing) of the cover member 1. The end member 2 is provided with a pair of terminals 21. The terminal 21 is configured such that electric power is supplied via a terminal (not shown) of a socket of a lighting fixture to which the lighting device 100 is attached. Further, the terminal 21 is connected to the power supply substrate 5 via a connection cable (not shown).

  As shown in FIG. 2, the LED substrate 3 is in series with the power supply substrate 5 along the tube axis direction (X direction in the drawing) of the cover member 1 (that is, the main surfaces of the substrates 3 and 5 form the same plane. The side surfaces of the substrates 3 and 5 are arranged so as to face each other. Here, the main surface means a main surface having a large area among the surfaces.

  As shown in FIG. 3, the LED substrate 3 is provided with a plurality of LEDs 31 at predetermined intervals along the longitudinal direction of the LED substrate 3 (X direction in the drawing). Further, the plurality of LEDs 31 are arranged in parallel in a plurality of rows (for example, two rows) in the short direction (Y direction in the drawing) of the LED substrate 3 along the longitudinal direction (X direction in the drawing) of the LED substrate 3. It may be arranged on the substrate 3.

  Further, as shown in FIGS. 3 and 4, the LED substrate 3 is provided with a hole-like engaging portion 32 that engages with a bent portion 71 (described later) of the restricting portion 7. By engaging the bent portion 71 of the restricting portion 7 with the engaging portion 32, it is possible to prevent the restricting portion 7 from being easily detached from the LED substrate 3. In the present embodiment, the case where the engaging portion 32 is configured by a hole communicating with the upper surface and the lower surface of the LED substrate 3 is described as an example. However, the present invention is not limited to this case. For example, the engaging portion 32 may be configured by a hole that communicates the side surface of the LED substrate 3 on the power supply substrate 5 side with either the upper surface or the lower surface of the LED substrate 3.

  In addition, the light emission surface side (upper side in FIG. 2) of several LED31 may be covered with fluorescent substance (illustration omitted). Here, the phosphor may be configured to emit light of a predetermined color when excited by light emitted from the LED 31. In addition, the components of the phosphor may be adjusted so that the combined light of the direct light from the LED 31 and the light emitted from the phosphor has a predetermined color temperature. The phosphor may have a predetermined width in the short direction (Y direction in the drawing) of the LED substrate 3 and a shape extending in the longitudinal direction of the LED substrate 3 (X direction in the drawing). Further, the phosphor may be applied on the upper side of the LED substrate 3 so as to cover the plurality of LEDs 31.

  The heat sink 4 is configured to dissipate heat generated from the LEDs 31. The heat sink 4 has a substrate installation surface 41 and a pair of ribs 42 and is formed in a hollow shape extending in the tube axis direction (X direction in the drawing) of the cover member 1. Further, the heat sink 4 has a substantially semicircular cross section and is configured to be inserted into the cover member 1. Specifically, the heat sink 4 is inserted into the cover member 1 with the Z direction positioned by a pair of ribs 121 of the back cover 12 of the cover member 1. The heat sink 4 may be made of aluminum, for example.

  The pair of ribs 42 are formed to extend in the tube axis direction (X direction in the drawing) of the cover member 1. Further, the pair of ribs 42 are formed to protrude upward (upward in FIG. 2) at a height smaller than the thickness of the LED substrate 3. Here, the LED substrate 3 is arranged on the substrate installation surface 41 in a state in which the positioning in the Y direction is performed by the pair of ribs 42, and on the substrate installation surface 41 of the heat sink 4, the tube axis direction of the cover member 1 (see FIG. It can move along the middle X direction.

  As shown in FIG. 3, the power supply substrate 5 has an upper surface (upper side in FIG. 3) for driving the LED 31 by converting AC power supplied from the outside into DC power for driving the LED 31. It is comprised so that it may prepare for. Here, the upper surface of the power supply substrate 5 is an example of the “first surface” in the present invention. The power supply substrate 5 is disposed outside the LED substrate 3 in the longitudinal direction (X direction in the drawing), and is connected to the terminal 21 via a connection cable (not shown). Further, the power supply substrate 5 is connected to the LED substrate 3 via the connection portion 6. Further, the power supply substrate 5 is disposed inside the cover member 1 in a portion covered with the end member 2. Thereby, it is possible to make the power supply board 5 difficult to see from the outside. Furthermore, the power supply board 5 is provided with a control circuit (not shown) for controlling the lighting of the LEDs 31.

  A plurality of components 511, 512 and 513 constituting the power supply circuit 51 are electrically connected by a wiring pattern (not shown) formed on the power supply substrate 5. Each component 511, 512, 513 may be, for example, a resistor, a capacitor, a coil, a diode, a transistor, or the like. In addition, each component 511, 512, 513 has a power supply board 5 such as by soldering so that the terminals 511a, 512a, 513a protrude downward from the lower surface of the power supply board 5 (the lower surface in FIG. 3). Is attached. Here, the lower surface of the power supply substrate 5 is a surface on the back side of the upper surface (first surface) of the power supply substrate 5 and is an example of the “second surface” in the present invention.

  The connection portion 6 is, for example, a lead wire or a lead terminal, and is used to electrically connect the LED 31 and the power supply circuit 51, for example, by soldering or the like on the upper surfaces of the LED substrate 3 and the power supply substrate 5 (FIG. 3). In FIG. The length of the connecting portion 6 is, for example, an allowable range of the distance x (shown in FIG. 4) in the tube axis direction (X direction in the drawing) of each of the substrates 3 and 5 (for example, the connecting portion 6 is cut or any substrate It may be set appropriately according to the range in which the connecting portion 6 does not come off from 3, 5 and the like.

  The regulating portion 7 regulates the interval x in the tube axis direction (X direction in the drawing) between the LED substrate 3 and the power supply substrate 5 to an allowable range (predetermined range). In the present embodiment, the regulating portion 7 is shown in FIG. Thus, it is configured to be provided on the lower surface side of the power supply substrate 5. In the present embodiment, the restricting portion 7 has an insulating property. Since the regulation part 7 has insulation, it can suppress that a short circuit etc. generate | occur | produce when the regulation part 7 contacts conductors, such as the power supply circuit 51, LED31, or the connection part 6, for example.

  Moreover, in this embodiment, the control part 7 has elasticity. In this case, for example, when the movement of the LED substrate 3 stops after the restricting portion 7 is elastically deformed along with the movement of the LED substrate 3, the elastic deformation of the restricting portion 7 is restored to move the LED substrate 3 to the movement start position side. Can be returned.

  Here, examples of the material constituting the restricting portion 7 include resins such as polyethylene terephthalate and polycarbonate. When the restricting portion 7 is configured using polycarbonate, the thin restricting portion 7 is formed. Can do.

  The regulating portion 7 is formed by bending a sheet-like member made of, for example, polycarbonate so that the upper surface has a U-shape as shown in FIG. Attached to the substrate 5. In this case, the terminals 511a, 512a, and 513a of the components 511, 512, and 513 of the power supply circuit 51 are connected to the outside in the longitudinal direction (X direction in the figure) and in the short direction (Y in the figure) by the restricting unit 7. Therefore, it is possible to suppress the occurrence of a short circuit or the like due to adhesion of a conductive substance or the like to the terminals 511a, 512a, and 513a of the components 511, 512, and 513 constituting the power supply circuit 51.

  On the LED substrate 3 side in the longitudinal direction (X direction in the drawing) of the restricting portion 7, a bent portion 71 extending to the LED substrate 3 side while being bent in the vertical direction (Z direction in the drawing) is provided. In this case, for example, when the restricting portion 7 expands and contracts based on the elastic deformation of the bent portion 71, the interval x between the LED substrate 3 and the power supply substrate 5 can be easily restricted within an appropriate range. Further, for example, even when the restricting portion 7 is in contact with the LED substrate 3 or the power supply substrate 5 and receives an impact, the impact can be mitigated by the bent portion 71.

  In the present embodiment, the bent portion 71 (the restricting portion 7) is provided so as to be interposed between the LED substrate 3 and the power supply substrate 5. In this case, for example, when the LED board 3 moves in a direction approaching the power supply board 5, the distance x between the LED board 3 and the power supply board 5 is less than the minimum value x2 (shown in FIG. 5B) of the allowable range. It can be easily suppressed. Moreover, the edge part by the side of the LED board 3 of the bending part 71 engages with the engaging part 32 of the LED board 3 from the upper direction of the LED board 3, for example, using an adhesive agent, a screw | thread etc., and the lower surface ( It is attached to the lower surface in FIG.

  Further, as shown in FIGS. 4 and 5, the bent portion 71 (regulating portion 7) includes a side surface of the LED substrate 3 on the power supply substrate 5 side and an upper surface of the LED substrate 3 (upper surface (first surface) of the power supply substrate 5). And the power supply substrate 5 side of the side surface). In this case, for example, even when the LED substrate 3 moves in a direction approaching the power supply substrate 5, the LED substrate 3 gets over the bent portion 71 (regulating portion 7) and contacts the power supply circuit 51. It can be surely regulated by (regulator 7). Thereby, for example, it is possible to prevent the LED circuit board 3 from colliding with the power supply circuit 51 and damaging the power supply circuit 51.

  In addition, although the bending number of the bending part 71 can be set arbitrarily, the impact absorption power of the control part 7 can be raised, so that the bending number increases.

  In the illumination device 100 configured as described above, an example in which the LED substrate 3 moves along the longitudinal direction (X direction in the drawing) will be described with reference to FIG. First, as shown in FIG. 5A, when the LED substrate 3 moves in a direction away from the power supply substrate 5, the bent portion 71 of the restricting portion 7 has an interval x between the substrates 3 and 5 within an allowable range. Elastic deformation until reaching the maximum value x1. When the distance x between the substrates 3 and 5 reaches the maximum allowable value x1, the movement of the LED substrate 3 away from the power supply substrate 5 is restricted. Here, when the movement of the LED board 3 in the direction away from the power supply board 5 is stopped, the elastic deformation of the bent portion 71 is restored, so that the LED board 3 is returned to the movement start position.

  Next, as shown in FIG. 5B, when the LED substrate 3 moves in a direction approaching the power supply substrate 5, the bent portion 71 of the restricting portion 7 has an allowable range x between the substrates 3 and 5. Until it reaches the minimum value x2. And if the space | interval x of each board | substrates 3 and 5 reaches the minimum value x2 of a tolerance | permissible_range, the movement of the LED board 3 in the direction approaching the power supply board | substrate 5 will be controlled. Here, when the movement of the LED board 3 in the direction approaching the power supply board 5 is stopped, the elastic deformation of the bent portion 71 is restored, so that the LED board 3 is returned to the movement start position.

  As described above, according to the illumination device 100 according to the present embodiment, the interval x between the LED board 3 and the power supply board 5 is regulated by the regulation unit 7 within an allowable range (here, x2 or more and x1 or less). For example, even when the LED board 3 moves in a direction away from or closer to the power supply board 5, the movement range of the LED board 3 is cut by, for example, the connection unit 6 or connected from any of the boards 3 and 5. It can restrict | limit to the range where the part 6 does not remove | deviate. Therefore, it is possible to suppress the occurrence of a conduction failure due to a positional shift between the LED substrate 3 and the power supply substrate 5.

  Hereinafter, modifications of the above-described embodiment will be described.

(Modification 1)
In the above-described embodiment, the case where the regulation unit 7 is provided on the power supply substrate 5 has been described as an example, but the present invention is not limited to this case. For example, the restricting portion 7 may be provided on the LED substrate 3, may be provided on each of the substrates 3, 5, or may be provided separately from each of the substrates 3, 5. Also in this case, it is possible to suppress the occurrence of a conductive failure due to the positional deviation between the LED substrate 3 and the power supply substrate 5 as in the above-described embodiment.

(Modification 2)
In the above-described embodiment, the case where the restricting portion 7 has the bent portion 71 that bends in the thickness direction (Z direction in the drawing) of each of the substrates 3 and 5 has been described as an example. For example, the restricting portion 7 may have a bent portion that bends in the short direction (Y direction in the drawing) of the substrates 3 and 5. Even in this case, similarly to the above-described embodiment, the interval x between the LED substrate 3 and the power supply substrate 5 can be easily regulated within an appropriate range based on the elastic deformation of the bent portion. Further, for example, even when the restricting portion 7 comes into contact with the LED substrate 3 or the power supply substrate 5 and receives an impact, the impact can be mitigated at the bent portion.

(Modification 3)
In the above-described embodiment, the case where the restricting portion 7 has elasticity has been described as an example, but the present invention is not limited to this case. For example, the regulation part 7 has a support part that supports the LED substrate 3 so as to be movable, and may restrict the movement range of the LED board 3 by restricting the movement of the support part to an allowable range. . Also in this case, it is possible to suppress the occurrence of a conductive failure due to the positional deviation between the LED substrate 3 and the power supply substrate 5 as in the above-described embodiment.

(Modification 4)
In the embodiment described above, the case where the engaging portion 32 is provided on the LED substrate 3 has been described as an example, but the present invention is not limited to this case. For example, the engaging portion 32 may be provided on the power supply substrate 5 or may be provided on each of the substrates 3 and 5. Even in this case, similarly to the above-described embodiment, the restricting portion 7 is engaged with the engaging portion 32, thereby preventing the restricting portion 7 from being easily detached from the LED substrate 3 and / or the power supply substrate 5. Can do.

(Modification 5)
In the embodiment described above, the case where the engaging portion 32 is formed in a hole shape has been described as an example. However, the present invention is not limited to this case. For example, as shown in FIG. 6, the engaging portion 32 may be formed in a concave shape on the side surface of the LED substrate 3 on the power supply substrate 5 side. In this case, the minimum value of the allowable range of the distance x between the LED substrate 3 and the power supply substrate 5 is compared with the case where the concave engaging portion 32 is not provided, for example, between the restricting portion 7 and the engaging portion 32. The engagement distance D can be reduced. Thereby, since the space | interval x of the LED board 3 and the power supply board 5 can be set small, the illuminating device 100 can be space-saving.

  The embodiment described above is described for facilitating understanding of the present invention, and is not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

  In this embodiment, although the case where one LED board 3 was provided was demonstrated as an example, it is not restricted to this. For example, a plurality of LED substrates may be provided in accordance with the dimensions and applications of the lighting device 100.

  Moreover, in this embodiment, although the case where the illuminating device 100 was formed in the straight tube | pipe shape was demonstrated as an example, it is not restricted to this, For example, it may be formed in cyclic | annular form and is plate-shaped. It may be formed.

3 ... LED substrate 31 ... LED
32 ... Engagement part 5 ... Power supply board 51 ... Power supply circuit 511, 512, 513 ... Parts 511a, 512a, 513a ... Terminal 6 ... Connection part 7 ... Restriction part 71 ... Bending part 100 ... Illumination device

Claims (8)

A first substrate on which a light emitting element is mounted, the first substrate being movably provided;
A second substrate on which a power supply circuit for driving the light emitting element is mounted;
A connection part for electrically connecting the light emitting element and the power supply circuit, the connection part being attached to each of the first substrate and the second substrate;
A restricting portion for restricting an interval between the first substrate and the second substrate to a predetermined range;
A lighting device comprising:   The lighting device according to claim 1, wherein the restricting portion is provided so as to be interposed between the first substrate and the second substrate.   When the power supply circuit is mounted on the first surface of the second substrate, the restricting portion includes the side surface on the second substrate side of the side surface of the first substrate and the surface of the first substrate. The lighting device according to claim 2, wherein the lighting device is formed to cover the second substrate side of the surface on the first surface side.   The lighting device according to claim 2, wherein an engagement portion that engages with the restriction portion is provided on at least one of the first substrate and the second substrate.   The lighting device according to claim 1, wherein the restricting portion has elasticity.   The lighting device according to claim 5, wherein the restricting portion has a bent portion.   The lighting device according to claim 1, wherein the restricting portion has an insulating property.   The said restriction | limiting part is formed so that the 2nd surface of the back side of the said 1st surface may be covered, when the said power supply circuit is mounted in the 1st surface of the said 2nd board | substrate. Lighting device.

Images