JP6167744B2 - lamp - Google Patents

Description

  The present invention relates to a cap-type lamp using a light emitting element such as an LED (Light Emitting Diode) or an organic EL (Electro Luminescence) as a light source.

  In recent years, with the increase in output and cost of LEDs, which are a kind of semiconductor light-emitting elements, cap-type LED lamps that can be used as an alternative to light bulbs have become widespread. In general, this type of LED lamp has a plurality of LEDs mounted on the surface of a flat LED substrate, and leads that supply electricity to the plurality of LEDs are passed through the inside of a cylindrical portion that extends from the back side of the LED substrate. It connects with the nozzle | cap | die provided in the terminal end of the cylindrical part (for example, refer patent document 1, patent document 2, and patent document 3).

JP 2010-010134 A JP 2009-206104 A JP 2011-60754 A

By the way, the LED lamp becomes heavier due to the heat dissipation structure that dissipates the heat generated by the LED as the output increases. This heat dissipation structure is generally provided integrally with a light source holding part that holds an LED substrate, and a cylindrical part is generally fixed to the light source holding part. However, since a load is applied to the fixing part between the light source holding part and the cylindrical part due to the weight of the light source holding part, a solid fixing structure between the light source holding part and the cylindrical part has been desired.
This invention is made | formed in view of the situation mentioned above, and it aims at providing the lamp | ramp which can fix a light source holding | maintenance part and a cylindrical part firmly.

In order to achieve the above object, the present invention provides a substrate on which a light-emitting element is mounted, a light source holding unit for mounting and holding the substrate on the surface, and a base extending from the back surface of the light source holding unit. In the lamp provided with the cylindrical portion, the light source holding portion is provided with a through-hole penetrating front and back, the cylindrical portion is inserted into the through-hole, and the cylindrical portion is formed at the edge of the through-hole. The provided flange portion is fixed , the central portion of the surface of the light source holding portion is recessed, a concave portion is provided integrally with the light source holding portion, and the through hole is provided at the bottom of the concave portion .

  According to the present invention, in the lamp described above, the cylindrical portion is formed of an insulating material, and the light source holding portion is formed of a metal having a heat dissipation property.

According to the present invention, in the lamp described above, the light source holding part includes a plurality of heat radiating fins on a back surface.
Further, according to the present invention, the radiating fin is provided on a back surface of the mounting portion of the light source holding portion on which the substrate is mounted, and a gap is formed between the radiating fin and the concave portion in the radial direction of the cylindrical portion. It is characterized by being formed.

  The present invention provides the lamp, wherein the tubular portion is provided between the first tubular portion inserted into the through hole, the first tubular portion, and the flange portion. A second flange portion having a diameter larger than that of the first cylindrical portion, and the recess portion is provided with a second recess portion having a diameter smaller than that of the recess portion, and the second flange portion includes the second flange portion. It is accommodated in a recessed part.

In the lamp according to the present invention, the cylindrical portion includes a second cylindrical portion having a diameter larger than that of the first cylindrical portion and to which the flange portion is coupled, and the second cylindrical shape. The part and the first tubular part are connected by the second flange part having a smaller diameter than the flange part.
Furthermore, the present invention provides the lamp described above, wherein the curvature radius of the corner of the connecting portion between the second flange portion and the first tubular portion is the connection between the flange portion and the second tubular portion. It is characterized by being larger than the curvature radius of the corner of the part.

Moreover, the present invention is characterized in that in the above lamp, a waterproof packing is provided between the second flange portion and the second recess.
In the lamp described above, the present invention is characterized in that a heat insulating material is provided between the flange portion and / or the second flange portion and the light source holding portion.
Moreover, the present invention is characterized in that, in the lamp, the flange portion is screwed to an edge portion of the through hole.

  According to the present invention, since the cylindrical portion and the light source holding portion can be fixed by hooking the flange portion of the cylindrical portion on the seat portion of the light source holding portion, the cylindrical portion and the light source holding portion are firmly fixed. Can be fixed to.

It is a schematic diagram which shows the illuminating device provided with the LED lamp which concerns on the 1st Embodiment of this invention. It is a figure which shows the gravity center of an LED lamp. It is sectional drawing of an LED lamp and a lamp holder. It is a top perspective view of an LED lamp. It is a bottom perspective view of an LED lamp. It is a disassembled perspective view of an LED lamp. (A) is sectional drawing of an LED lamp, (B) is the B section enlarged view in a figure. It is a top view of an LED lamp. It is a figure which shows the arrangement | positioning relationship between a globe attachment part and LED. It is a disassembled perspective view of a light source holding part and a cylindrical part. It is a figure which shows the structure of a holder part, (A) is a perspective view which shows the structure of a holder part, (B) is a front perspective view which shows the state which supported the electric circuit board in the holder part, (C) is a holder part It is a back perspective view which shows the state which supported the electric circuit board. It is a circuit diagram of an electric circuit board. It is a front view of the LED lamp which concerns on 2nd Embodiment. It is the top view which looked at the LED lamp from upper direction. It is a bottom perspective view of an LED lamp. It is a disassembled perspective view of an LED lamp. It is XVII-XVII sectional drawing of FIG. It is a front view of a cylindrical part. It is XIX-XIX sectional drawing of FIG. It is XX-XX sectional drawing of FIG. It is the top view which looked at the board | substrate support plate and the cylindrical part from upper direction. It is an enlarged view of the vicinity of the connection part and cylindrical part connection part of FIG. It is a bottom perspective view of the LED lamp in a state where a socket is attached. It is sectional drawing which shows the connection part of a socket and a nozzle | cap | die. It is a top view of the loosening prevention member seen from the enlarged diameter part side. It is a top view of the loosening prevention member seen from the socket side. It is a perspective view of a loosening prevention member. It is XXVIII-XXVIII sectional drawing of FIG.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
In the following first embodiment, an LED lamp having an LED as a light source is exemplified as a lamp having a light emitting element as a light source. However, the present invention is not limited to this, and for example, an organic EL or the like. The present invention can also be applied to a lamp having another light emitting element as a light source.
FIG. 1 is a diagram illustrating a lamp device 100 including an LED lamp 1 according to the first embodiment.
A lamp device 100 shown in the figure is an outdoor installation type lighting fixture used for outdoor signboard illumination and the like, and includes an LED lamp 1, a lamp holder 110 to which the LED lamp 1 is mounted, and a power supply line to the lamp holder 110. And a power supply unit 101 connected at 102.

The lamp holder 110 is a holder to which an existing light bulb can be mounted. The LED lamp 1 is configured to have substantially the same shape and optical characteristics as the existing light bulb, and is mounted on the lamp holder 110 instead of the existing light bulb. Can be used. A glove (cover) 12 is attached to the tip of the LED lamp 1. The globe 12 is formed using, for example, glass or resin whose surface is polished (frosted), and has light diffusibility. Light emitted from the LED lamp 1 is diffused and emitted by the globe 12. The LED lamp 1 is provided with a plurality of radiating fins 25 extending along the outer peripheral surface of the lamp holder 110.
The lamp holder 110 includes a cylindrical holder housing (holder portion) 111, and an end portion 112 of the holder housing 111 is provided with an arm attachment portion 113 to which a support arm (not shown) is rotatably attached. ing.

  The power supply unit 101 accommodates a power supply (power converter) that generates a direct current for lighting the LED 15 of the LED lamp 1 and a power supply board (not shown) on which a drive circuit is mounted. As described above, the LED lamp 1 of the present embodiment includes the power supply unit 101 that houses the power supply board as a separate body. When using an existing light bulb such as a mercury lamp in the lamp holder 110, it is necessary to provide a ballast separate from the light bulb. When the LED lamp 1 is mounted on the lamp holder 110 instead of the existing light bulb, the power supply unit 101 can be replaced with a ballast. According to this configuration, since the power supply unit 101 including the power supply board for lighting the LED 15 is provided separately from the LED lamp 1, the LED lamp 1 can be reduced in weight.

As shown in FIG. 2, the LED lamp 1 is configured such that its own weight center position X is located in the heat radiation fin 25 in the lamp optical axis direction. A tip opening 115 into which the LED lamp 1 is inserted is provided at the tip 114 of the holder housing 111. The tip opening 115 of the holder housing 111 is abutted against the LED lamp 1 when the LED lamp 1 is mounted, and is closed. Further, a waterproof packing (seal member) 116 is provided at the tip opening 115, and the waterproof packing 116 is sandwiched between the LED lamp 1 and water can be reliably prevented from entering from the edge of the opening. . Thereby, the lamp device 100 can be suitably used by being installed in a place that is affected by rainwater outdoors or the like.
The self-weight center position X of the LED lamp 1 is higher than the position where the tip opening 115 of the holder housing 111 abuts the LED lamp 1 when the LED lamp 1 is mounted on the lamp holder 110 as described above. It is configured to be located inside the body 111.

As shown in FIG. 3, a socket (not shown) into which the base 3 of the LED lamp 1 is screwed is disposed inside the holder housing 111. Although not shown, the socket is connected to a power supply line 102 that is drawn from outside and supplies power via the power supply unit 101, and power is supplied from the base 3 to the LED lamp 1.
According to these configurations, the lamp holder 110 can support the LED lamp 1 at two locations: a socket into which the base 3 is screwed and a tip opening 115 of the holder housing 111 that contacts the LED lamp 1. Therefore, the strength for holding the LED lamp 1 can be improved. In addition, since the center X of the weight of the LED lamp 1 is located inside the holder housing 111, the LED lamp 1 can be supported also at the position of the front end opening 115 of the holder housing 111, and the LED holder 110 The strength against vibration when the lamp 1 is mounted can be improved.
Further, the LED lamp 1 is formed so that the length of the portion accommodated inside the holder housing 111 is longer than the length of the exposed portion outside the holder housing 111 in the optical axis direction. Since the LED lamp 1 is supported at the position of the tip 114 of the holder housing 111 and is formed with a short length exposed to the outside of the holder housing 111, the strength against vibration is improved.

Next, the configuration of the LED lamp 1 will be described. 4 is a top perspective view of the LED lamp 1, FIG. 5 is a bottom perspective view of the LED lamp 1, FIG. 6 is an exploded perspective view of the LED lamp 1, and FIG. 7 is a cross-sectional view of the LED lamp 1. .
As shown in FIGS. 4 to 7, the LED lamp 1 includes a light emitting portion 10, a cylindrical portion 30 that extends downward and perpendicular to the light emitting portion 10, and has a base 3 provided at a terminal end 30B. And a plurality of heat dissipating fins 25 provided on the back surface of the portion 10.

The light emitting unit 10 emits light upward from substantially the entire upper surface 10A, and includes a globe 12 formed in a circular shape in a top view as shown in FIG. As shown in FIG. 8, the light emitting unit 10 includes a plurality of LEDs 15 that are light sources, an LED substrate (substrate) 11 on which these LEDs 15 are mounted, a globe 12, and a light source holding unit that holds the LED substrate 11 on which the LEDs 15 are mounted. 20.
The surface of the globe 12 on which a light beam in the radiation range of the LED 15 as a light source enters is formed with a constant curvature. As shown in FIG. 4, the globe 12 is provided with a screwing portion 13 for screwing a screw 41 for fixing the globe 12 to the light source holding portion 20. The screwing portion 13 is formed by denting a plurality of locations of the edge portion 12 </ b> A of the globe 12 toward the center of the globe 12. In the present embodiment, four screwing portions 13 are formed at equal intervals in the circumferential direction of the globe 12.

As shown in FIG. 9, the screwing portion 13 is provided at a location outside the radiation range α of the LED 15. More specifically, the screwing portion 13 is provided at a location outside the radiation range α where the light emitted from the LED 15 is half the maximum luminous intensity from the optical axis C of the LED 15 where the light emitted from the LED 15 has the maximum luminous intensity. It is done. In the present embodiment, the light intensity of the light emitted from the LED 15 is a half beam angle that is twice the angle between the light intensity direction at which the light intensity is half the maximum light intensity and the optical axis C. β is 120 degrees. And the screwing part 13 is provided in the location remove | deviated from 1/2 beam angle (beta) of LED15. That is, the surface of the globe 12 on which a light beam in the range of at least a half beam angle β of the LED 15 is incident is formed with a constant curvature.
In the position where the screwing portion 13 is provided, the surface of the globe 12 on which the light beam enters cannot be made to have a constant curvature, which may affect the light distribution of the LED 15, but according to this configuration, Since the screwing portion 13 is provided at a position deviating from the half beam angle β, the influence of color unevenness, illuminance unevenness and the like due to the screwing portion 13 can be reduced.

  As shown in FIG. 6, the light source holding unit 20 is a substantially circular member having a diameter larger than that of the cylindrical unit 30 when viewed from above. The light source holding part 20 is formed of a metal having heat dissipation properties. In the present embodiment, the light source holding unit 20 is formed by aluminum die casting. The light source holding part 20 includes a placement part 21 on which the LED substrate 11 is placed on the surface, and the radiation fins 25 are provided on the back surface of the placement part 21. The heat radiation fin 25 is formed integrally with the light source holding unit 20. Thus, by integrally forming the radiation fin 25 on the light source holding unit 20, the thermal resistance between the mounting portion 21 on which the LED substrate 11 is placed and the radiation fin 25 is suppressed, High heat dissipation performance can be obtained by increasing the amount of heat transfer.

  Each of the heat radiation fins 25 is a thin plate having substantially the same shape, and a large number of radiating fins 25 are arranged substantially radially about the axis of the cylindrical portion 30 when viewed from the back surface 20B of the light source holding portion 20 and are erected on the back surface 20B of the light source holding portion 20. Has been. Further, the radiation fins 25 are formed so as to protrude in the radial direction of the light source holding unit 20 outside the outer periphery of the placement unit 21. Further, the heat radiating fins 25 extend toward the base 3 along the axis of the cylindrical portion 30. The light emitting unit 10 can efficiently dissipate heat generated by the LED substrate 11 mounted on the mounting unit 21 of the light source holding unit 20 by using the heat radiation fins 25. Moreover, since the radiation fin 25 is erected on the back surface 20B of the light source holding part 20 and extends in the direction of the base 3 along the axis of the cylindrical part 30, as described above, the weight center position X of the LED lamp 1 is When the LED lamp 1 is mounted on the lamp holder 110, the LED lamp 1 can be configured to be positioned inside the holder housing 111. The heat radiation fin 25 is configured such that a gap S is formed between the LED lamp 1 and the outer peripheral surface of the holder housing 111 when the LED lamp 1 is mounted on the lamp holder 110 as shown in FIG. According to this configuration, the cooling performance of the radiating fins 25 can be improved without the flow of air flowing between the adjacent radiating fins 25 being hindered by the holder housing 111.

The LED 15 is formed, for example, by packaging an LED element. In this embodiment, a white LED is used as the LED 15. Needless to say, an LED having a light emitting color other than white may be used for the LED 15.
The LED substrate 11 is formed in a substantially cross shape (see FIG. 8), a plurality of LEDs 15 are mounted on the front surface, and the back surface is brought into contact with the mounting portion 21 of the light source holding unit 20, so It is fixed by screws 42 with screws. The LED board 11 is provided with a wiring hole 11 </ b> A through which a lead wire (not shown) for supplying power is passed substantially at the center. A lead wire drawn out from the wiring hole 11A to the surface side of the LED substrate 11 is electrically connected to an LED light emitting circuit 70 (see FIG. 12) including four LEDs 15.

  A plurality of fixing portions 29 for fixing the globe 12 covering the LED substrate 11 with screws 41 are provided on the surface 20A of the light source holding portion 20 in the vicinity of the outer peripheral edge of the mounting portion 21 at equal intervals in the circumferential direction. . The fixing portion 29 is provided at a position corresponding to the screwing portion 13 provided on the globe 12. Further, the surface 20 </ b> A of the light source holding part 20 is provided with a groove 26 provided along the outer peripheral edge of the mounting part 21 provided inside the fixing part 29 so as to avoid the fixing part 29. A waterproof member 27 that waterproofs the light emitting unit 10 is fitted into the groove 26. The waterproof member 27 is formed in advance in a shape that matches the shape of the groove 26 by an elastic member such as silicon, and is fitted into the groove 26. The globe 12 is provided with a flange 14 that abuts against a waterproof member 27 fitted in the groove 26. The flange 14 is formed integrally with the globe 12 along the outer periphery of the globe 12. Since the screwing portion 13 described above is formed inside the outer periphery of the globe 12, the outer dimensions of the globe 12 can be reduced as compared with the case where the flange 14 is screwed to the light source holding portion 20.

  The waterproof member 27 is mounted on the flange 14 of the globe 12 as the screw 41 inserted through the screwing portion 13 is screwed into a boss 29A provided on the fixing portion 29 of the surface 20A of the light source holding portion 20. It is crushed and pinched with the mounting part 21. As described above, the mounting structure of the globe 12 to the mounting portion 21 is a screw structure, and the waterproofing member 27 is sandwiched between the flange 14 of the globe 12 and the mounting portion 21, thereby making the light emitting portion 10 waterproof. Has been enhanced. In particular, by sandwiching the waterproof member 27 between the flange 14 and the placement portion 21, the flange 14 of the flat planar globe 12 is brought into contact with the vicinity of the periphery of the flat planar placement portion 21. Even if the globe 12 is fixed to the light source holding part 20, the water such as rain water does not enter the light emitting part 10 from between the contact surfaces between the flange 14 and the light source holding part 20, and the LED lamp 1 is It can be a waterproof structure.

  The screw hole provided in the screwing portion 13 of the globe 12 is formed to have a size that allows insertion of the boss 29A provided in the fixing portion 29 provided on the surface 20A of the light source holding portion 20. According to this configuration, when the globe 12 is fixed to the light source holding unit 20, the boss 29 </ b> A of the light source holding unit 20 is inserted into the screw hole of the globe 12, and the globe 12 is fixed to the light source holding unit 20 in a predetermined manner. Since it can be positioned, the workability of attaching the globe 12 to the light source holding part 20 is improved.

  The LED substrate 11 has an outer peripheral edge formed in a shape along the shape of the groove 26 provided in the mounting portion 21. That is, the LED substrate 11 is formed in a substantially cross shape in which a portion corresponding to a part of the outer periphery of the flat disk, in particular, the fixing portion 29 provided on the surface 20A of the light source holding portion 20 is cut out (see FIG. 8). The LED substrate 11 is mounted on the mounting portion 21 and is fixed to the mounting portion 21 with screws 42 inside the groove 26. Further, since the LED substrate 11 is made of a metal material such as an aluminum material having a high thermal conductivity, the heat generated by the LED 15 is efficiently transferred to the mounting portion 21 of the light source holding portion 20 and radiated from the radiation fins 25. Can be made. A plurality of LEDs 15 are mounted concentrically on the mounting surface, which is the surface of the LED substrate 11, and in particular, mounted near the outer periphery of the LED substrate 11. In particular, the LED substrate 11 is disposed at a position that is farthest from the center of the LED substrate 11 in the radial direction, in a position that avoids the position where the globe 12 is screwed to the light source holding unit 20 by the screw 41. Thereby, the irradiation range of the LED lamp 1 can be widened.

The cylindrical portion 30 is provided with a base 3 attached to the end 30B. The cylindrical portion 30 is formed by using an insulating resin material such as polycarbonate. Thereby, insulation with the cylindrical part 30 and the nozzle | cap | die 3 is achieved. According to this structure, weight reduction of the cylindrical part 30 can be achieved by shape | molding the cylindrical part 30 using a resin material.
In addition, the structure which forms the member formed from the metal which has heat conductivity, and the member formed from the material which has insulation may be sufficient as the cylindrical part 30.

The cylindrical portion 30 includes a flange portion 31 at the tip 30 </ b> A fixed to the light source holding portion 20. The flange portion 31 is formed integrally with the cylindrical portion 30 by resin molding. According to this structure, since the cylindrical part 30 was integrally molded using the resin material, the cylindrical part 30 can be reduced in weight.
Inside the cylindrical portion 30, the electric circuit board 50 is held and stored in a board holder 55. The electric circuit board 50 is electrically connected to the base 3 through a lead wire (not shown) at the end on the base 3 side.

  The base 3 is provided with a cylindrical shell 6 that is threaded into a socket (for example, E26 type socket) of an existing lamp holder 110 and an insulating portion 4 at the top of the end of the shell 6. The shell 6 and the eyelet 5 are configured to have a shape and dimension that can be attached to an existing socket. Thereby, the said LED lamp 1 can be mounted | worn with the socket of the said lamp holder 110 which mounts and uses the existing socket and the existing light bulb, and can use it as an alternative of the existing light bulb.

By the way, although the light source holding part 20 can obtain a high heat dissipation performance by using a metal material such as aluminum, the weight increases, so that the strength of the connection part with the resin cylindrical part 30 is insufficient. There is also. Therefore, in the LED lamp 1 of the present embodiment, the fixing structure between the light source holding part 20 and the cylindrical part 30 is a fixing structure for firmly fixing the light source holding part 20 and the cylindrical part 30.
The fixing structure between the light source holding part 20 and the cylindrical part 30 will be described in detail. As shown in FIGS. 6 and 10, the light source holding part 20 is a recess formed by recessing a substantially central part of the surface 20A. 22 is provided. In addition, a through hole 23 penetrating the front and back is provided in the bottom portion 22 </ b> A of the concave portion 22 at substantially the center of the light source holding portion 20. The through hole 23 is formed to have a diameter that allows the cylindrical portion 30 to pass therethrough. The recess 22 is formed in a truncated cone shape whose diameter decreases toward the bottom 22A. A plurality of thin plate-like fins 28 are erected on the side surface 22 </ b> B of the recess 22. The fin 28 is configured such that the upper end 28 </ b> A comes into contact with the back surface of the LED substrate 11 when the LED substrate 11 is placed on the placement portion 21 of the light source holding portion 20. In particular, the fin 28 is desirably provided in the vicinity of a position where the LED 15 mounted on the LED substrate 11 mounted on the mounting unit 21 of the light source holding unit 20 is disposed. According to this configuration, the light source holding part 20 reduces the area of the mounting part 21 that contacts the LED substrate 11 to form the concave part 22, thereby reducing the weight of the light source holding part 20, and from the fins 28. The heat generated by the LED 15 can be transferred to the light source holding unit 20 via the LED substrate 11 and efficiently radiated by the radiation fins 25.

On the surface of the bottom 22A of the recess 22, four bosses 24 for screwing the cylindrical portion 30 to the light source holding portion 20 are provided at equal intervals.
The cylindrical part 30 is inserted into the through hole 23 of the light source holding part 20 from the surface side of the light source holding part 20. A disc-shaped flange portion 31 is provided in a collar shape at the tip 30 </ b> A of the cylindrical portion 30. The flange portion 31 is integrally formed with the tubular portion 30 by resin molding. The outer diameter of the flange portion 31 is formed to be substantially the same as or slightly smaller than the outer diameter of the bottom portion 22 </ b> A of the light source holding portion 20. Moreover, the structure which the several rib 31A is standingly arranged in the surface of the flange part 31, and the intensity | strength of the flange part 31 is improved by the said rib 31A may be sufficient. When the cylindrical portion 30 is inserted into the through hole 23 from the surface side of the light source holding portion 20, the flange portion 31 of the cylindrical portion 30 is hooked on the bottom portion 22 </ b> A along the edge of the through hole 23.

  The flange portion 31 is provided with a boss hole 33 penetrating the front and back. The boss hole 33 is provided at a position corresponding to the boss 24 provided in the bottom 22 </ b> A of the recess 22. When the cylindrical part 30 is inserted into the through hole 23 of the light source holding part 20, the boss 24 is inserted into the boss hole 33. That is, the cylindrical portion 30 is inserted into the through hole 23 of the light source holding portion 20, the flange portion 31 is hooked on the bottom portion 22 </ b> A of the light source holding portion 20, and further, the bottom portion 22 </ b> A is engaged with the boss hole 33 of the flange portion 31. The boss 24 is inserted and locked to the light source holding part 20. Then, as shown in FIG. 10, the cylindrical portion 30 is inserted into the boss hole 33 and fixed to the light source holding portion 20 by a screw 43 that is screwed into the boss 24. Note that a washer 44 may be sandwiched between the screw 43 and the boss 24.

In the present embodiment, the light source holding unit 20 is made of metal, and thus is heavy. The cylindrical part 30 fixed to the light source holding part 20 with a screw 43 is formed of a resin whose strength tends to be lower than that of metal. Therefore, the cylindrical portion 30 is likely to be subjected to a load due to the weight of the light source holding portion 20 in the boss hole 33 into which the screw 43 is inserted. Moreover, the cylindrical part 30 shape | molded with the resin material may deteriorate by external factors, such as an ultraviolet-ray and a vibration, and intensity | strength may fall. Due to these factors, the flange portion 31 may be cracked from the boss hole 33. According to the configuration of the present application, the cylindrical portion 30 of the through hole 23 of the light source holding portion 20 is inserted, and the flange portion 31 of the cylindrical portion 30 is hooked on the bottom portion 22 </ b> A of the edge portion of the through hole 23. Since 30 is fixed to the light source holding part 20, even if the flange part 31 is cracked due to deterioration, the light source holding part 20 is not detached from the cylindrical part 30, and the connection function is not lost. .
Further, since the flange portion 31 of the cylindrical portion 30 is fixed to the bottom portion 22A of the concave portion 22 provided on the surface 20A of the light source holding portion 20, the flange portion 31 is placed on the placement portion 21 of the light source holding portion 20. The touched LED substrate 11 is not directly touched. Thereby, it can prevent that the flange part 31 shape | molded by the resin material becomes the thermal resistance of the LED board 11. FIG. Moreover, since the cylindrical part 30 can be arrange | positioned away from the LED board 11, the cylindrical part 30 formed from the resin material touches directly the LED board 11 which becomes high temperature with the heat | fever which LED15 emits, a deformation | transformation, etc. It is possible to prevent problems such as deterioration.

  As shown in FIG. 5, the back surface 20 </ b> B of the light source holding unit 20 is formed in a shape along the concave portion 22 formed on the front surface 20 </ b> A of the light source holding unit 20. The back surface 20 </ b> B is provided with an extending portion 37 that is formed along the edge portion of the through hole 23 and extends from the bottom portion 22 </ b> A along the cylindrical portion 30 in a shaft shape. Further, a bottomed end portion 38 of the boss 24 formed on the surface of the bottom portion 22A protrudes from the back surface of the bottom portion 22A. When the LED lamp 1 is mounted on the lamp holder 110 between the heat radiating fins 25 and the recesses 22 on the back surface 20B of the light source holding unit 20, a front end opening 115 of the holder housing 111 has a waterproof packing (not shown). A contact portion 36 is formed to be in contact with the seal member 116 therebetween. The abutting portion 36 is a surface substantially parallel to the mounting portion 21 of the light source holding portion 20, and the tip opening 115 to which the waterproof packing 116 is attached in advance abuts against the abutting portion 36, so that the inside of the lamp holder 110 is securely It is configured to be sealed.

As shown in FIG. 6, an O-ring 32 is attached to the tubular part 30 before the tubular part 30 is inserted into the through hole 23 of the light source holding part 20. When the cylindrical part 30 is inserted into the through hole 23 of the light source holding part 20, the O-ring 32 attached to the cylindrical part 30 has an extension part 37 extending from the edge part of the through hole 23, the cylindrical part 30, and It is sandwiched between and compressed. Thereby, it is possible to prevent water such as rainwater from entering the light emitting unit 10 from the gap between the through hole 23 and the cylindrical part 30.
According to these configurations, the LED lamp 1 includes a waterproof member 27 disposed between the light source holding unit 20 and the globe 12, and an O-ring disposed between the tubular unit 30 and the light source holding unit 20. 32 and a waterproof structure sealed with a base 3 attached to the end 30B of the cylindrical portion 30.
The LED substrate 11 and the globe 12 are fixed to the light source holding part 20 after fixing the cylindrical part 30 to the light source holding part 20. The base 3 is attached to the cylindrical portion 30 after fixing the cylindrical portion 30 to the light source holding portion 20.

As shown in FIG. 7, an electric circuit board 50 is accommodated inside the cylindrical portion 30. The electric circuit board 50 is held by the board holder 55 and inserted into the cylindrical portion 30. As shown in FIG. 11A, the substrate holder 55 includes a pair of sandwiching portions 59 that sandwich the electric circuit substrate 50 and a bridge portion 58 that spans between the pair of sandwiching portions 59. In the following description, the front and rear of the substrate holder 55 is based on the direction when the substrate holder 55 is viewed from the direction shown in FIG. The clamping part 59 and the bridge part 58 are integrally formed.
The clamping unit 59 includes a front support part 59A, a rear support part 59B, and a lower end support part 59C. As shown in FIGS. 11B and 11C, the electric circuit board 50 is slid between the front support part 59A and the rear support part 59B, and the lower end is placed on the lower support part 59C. , Held by the holder portion 57.

  As shown in FIG. 7A, the substrate holder 55 is inserted into the tubular portion 30 with the electric circuit board 50 being sandwiched between the sandwiching portions 59, and both end portions 58A of the bridge portion 58 are connected to the tubular portion 30. The flange portion 31 is hooked and locked. As shown in FIG. 7B, the substrate holder 55 is inserted into the screw hole 58B formed in the bridge portion 58 when the cylindrical portion 30 is fixed to the light source holding portion 20 with the screw 43. Then, together with the tubular portion 30, the light source holding portion 20 is fixed to the bottom portion 22 </ b> A by a screw 43.

  By the way, since LED15 has polarity, there exists a problem that it is not lighted when a positive electrode and a negative electrode are reversed and connected. For this reason, when the lamp device 100 is installed, it is necessary to locate the positive / negative electrode of the power supply line 102 that supplies the electric power via the power supply unit 101 to the LED lamp 1 via the base 3, which is inefficient. In this embodiment, the electric circuit board 50 is built in the LED lamp 1 in order to improve the efficiency of the installation work of the lamp device 100.

As shown in FIG. 12, a fuse 51 is connected to the electric circuit board 50 on the input side of the direct current input from the power supply unit 101 separately provided from the LED lamp 1 via the terminals 53 and 54. Note that the fuse 51 is attached to the electric circuit board 50 in order to prevent an accident from occurring when, for example, AC 200V or the like is connected to the lamp holder 110 instead of the power supply unit 101 by mistake.
The electric circuit board 50 includes a rectifier 52 on the downstream side of the fuse 51. The LED light emitting circuit 70 formed on the back surface of the LED substrate 11 is supplied with the power rectified by the rectifier 52. According to this configuration, since the LED lamp 1 includes the electric circuit board 50, the LED 15 can be connected regardless of which of the terminal 53 or the terminal 54 that is the input terminal of the LED lamp 1 is a positive terminal or a negative terminal. Can emit light. As a result, when the lamp device 100 is installed, the power supply line 102 that supplies power via the power supply unit 101 to the LED lamp 1 via the base 3 can be used without worrying about the positive / negative wiring. It is possible to connect to the socket inside, and to improve the efficiency of the installation work.

As described above, according to the first embodiment to which the present invention is applied, the LED substrate 11 on which the LED 15 is mounted, the light source holding unit 20 that places and holds the LED substrate 11 on the surface, and the light source In the LED lamp 1 including the cylindrical portion 30 that extends from the back surface 20B of the holding portion 20 and is provided with the base 3 at the terminal end 30B, the light source holding portion 20 is provided with a through hole 23 that penetrates the front and back surfaces. The cylindrical part 30 was inserted, and the flange part 31 provided in the cylindrical part 30 was hooked and fixed to the bottom part 22A provided along the edge part of the through-hole 23.
According to this configuration, the flange portion 31 of the cylindrical portion 30 is hooked and fixed inside the light source holding portion 20. As a result, a load due to the weight of the light source holding part 20 is applied to the boss hole 33 into which the screw 43 for screwing the flange part 31 to the light source holding part 20 is applied, and the boss hole 33 is broken or broken. Thus, even when the connection function between the cylindrical portion 30 and the light source holding portion 20 due to screwing or the like is lost, the light source holding portion 20 is not detached from the cylindrical portion 30 and the light source holding portion 20 and the cylindrical shape are not separated. The part 30 can be firmly fixed.

  Further, according to the first embodiment to which the present invention is applied, the cylindrical portion 30 is formed of an insulating material, and the light source holding portion 20 is formed of a metal having heat dissipation properties. Thereby, the insulation of the nozzle | cap | die 3 and the cylindrical part 30 can be aimed at. Moreover, since the cylindrical part 30 is shape | molded with a resin material and it can reduce in weight compared with the case where the cylindrical part 30 is formed with a metal, the weight reduction of the LED lamp 1 can be achieved. Moreover, since the light source holding part 20 is formed of a metal having heat dissipation, the heat of the LED substrate 11 can be efficiently transferred to the light source holding part 20.

  Further, according to the first embodiment to which the present invention is applied, the concave portion 22 is provided on the surface 20 </ b> A of the light source holding portion 20, and the through hole 23 is provided on the bottom portion 22 </ b> A of the concave portion 22. Thereby, the flange part 31 of the cylindrical part 30 does not touch the back surface of the LED board 11 mounted in the mounting part 21 provided in the surface 20A of the light source holding part 20 directly. Therefore, it can prevent that the flange part 31 shape | molded with the resin material becomes thermal resistance of the LED board 11. FIG.

  Further, according to the first embodiment to which the present invention is applied, the light source holding unit 20 includes the plurality of heat radiation fins 25 on the back surface 20B. According to this configuration, the plurality of radiating fins 25 are integrally formed on the back surface 20B of the light source holding unit 20 formed of a heat radiating metal, and the heat of the LED substrate 11 transferred to the light source holding unit 20 is radiated. The fins 25 can efficiently dissipate heat.

[Second Embodiment]
The second embodiment of the present invention will be described below with reference to the drawings.
In the second embodiment, an LED lamp including an LED as a light source is exemplified as a lamp including a light emitting element as a light source. However, the present invention is not limited to this, and other examples such as an organic EL may be used. The present invention can also be applied to a lamp having a light emitting element as a light source.
FIG. 13 is a front view of an LED lamp 200 according to the second embodiment. FIG. 14 is a plan view of the LED lamp 200 as viewed from above. FIG. 15 is a bottom perspective view of the LED lamp 200. FIG. 16 is an exploded perspective view of the LED lamp 200. 17 is a cross-sectional view taken along the line XVII-XVII in FIG.

As shown in FIGS. 13 to 17, the LED lamp 200 is provided at the light emitting part 210 on the upper surface, the cylindrical part 230 that extends orthogonally to the light emitting part 210 and extends downward, and the terminal end 230 </ b> B of the cylindrical part 230. And a plurality of radiating fins 225 provided on the back surface of the light emitting unit 210, and a loosening prevention member 260 provided adjacent to the base 3 in the cylindrical part 230.
The light emitting unit 210 emits light from substantially the entire upper surface 210A upward in FIG. 1, and as shown in FIG. 14, a globe 212 (cover) formed in a substantially circular shape in a top view. Is provided.
Specifically, as shown in FIG. 16, the light emitting unit 210 includes a plurality of LEDs 215 (light emitting elements) that are light sources, an LED substrate (substrate) 211 on which these LEDs 215 are mounted, and a substrate support plate that holds the LED substrate 211. 220 (light source holding unit) and a globe 212. The substrate support plate 220 corresponds to the light source holding unit 20 of the first embodiment. The globe 212 is a cover that covers the LED substrate 211, and the light of the LED 215 passes through the globe 212 and is irradiated to the outside.

The substrate support plate 220 is formed in a substantially circular shape having a diameter larger than that of the cylindrical portion 230, and the disk-shaped substrate mounting portion 221 on which the LED substrate 211 is mounted on the surface and the cylindrical portion 230 are formed. The cylindrical part connection part 261 and the radiation fin 225 to be connected are integrally provided. The substrate support plate 220 is formed of a metal having high heat dissipation properties, and in this embodiment, is formed by casting an aluminum alloy by a die casting method. The substrate support plate 220 may be formed by casting a magnesium alloy, for example.
The surface of the substrate mounting part 221 is a flat mounting surface 221C on which the LED substrate 211 is mounted. A plurality of screw hole portions 221A (FIG. 16) are provided at substantially equal intervals in the circumferential direction at the intermediate portion in the radial direction of the substrate mounting portion 221, and the LED substrate 211 is mounted on the screw hole portion 221A. A screw 242 to be fixed to the mounting portion 221 is fastened.

An annular groove 226 having a larger diameter than the LED substrate 211 is formed on the outer edge portion of the mounting surface 221C of the substrate mounting portion 221 over the entire circumference. A waterproof member 227 made of an elastic material such as silicon is fitted into the groove 226.
The substrate support plate 220 includes a plurality of plate-like cover fixing portions 262 extending radially outward from the outer peripheral portion of the substrate mounting portion 221, and the cover fixing portion 262 is formed with a boss portion 262 A to which the globe 212 is fixed. ing.
The globe 212 includes an outer peripheral flange portion 214 that covers the groove 226 from above on the outer peripheral portion, and the outer peripheral flange portion 214 has a fixing portion 214 a that further extends radially outward at a position corresponding to the cover fixing portion 262. The globe 212 is fixed to the cover fixing portion 262 through a screw 241 that is inserted into the fixing portion 214a and fastened to the boss portion 262A. In this state, the waterproof member 227 is compressed by the outer peripheral flange portion 214.

The LED 215 is formed by packaging, for example, an LED element. In this embodiment, a white LED is used as the LED 215. Needless to say, the LED 215 may be a light emitting color LED other than white.
The LED substrate 211 is formed in a disk shape, and a plurality of LEDs 215 are mounted in a concentric manner on the outer peripheral portion of the mounting surface, which is the surface of the LED substrate 211.
The LED substrate 211 is fixed by screws 242 in a state where the back surface thereof is in contact with the substrate mounting portion 221 of the substrate support plate 220. A wiring hole 211 </ b> A through which the power supply lead 263 of the LED 215 is passed is formed substantially at the center of the LED substrate 211.
The LED substrate 211 is made of a metal material having a high thermal conductivity, such as an aluminum material. For this reason, the heat generated by the LED 215 can be efficiently transferred to the substrate mounting portion 221 of the substrate support plate 220, and can be effectively radiated from the radiation fins 225.

  The cylindrical portion connecting portion 261 of the substrate support plate 220 is a concave portion formed so as to be recessed on the base 3 side of the center portion of the surface of the substrate mounting portion 221. The cylindrical cylindrical portion 264 and the cylindrical portion And a through hole 223 that penetrates the bottom of the part connection part 261. The starting end 230A of the cylindrical portion 230 is fitted and connected to the through hole 223.

The heat radiating fins 225 are thin plates standing substantially perpendicular to the back surface of the substrate placement portion 221 of the substrate support plate 220, and the respective plates are formed in substantially the same shape. A plurality of radiating fins 225 are arranged substantially radially around the cylindrical portion connecting portion 261 around the axis of the cylindrical portion 230, and are arranged at substantially equal intervals in the circumferential direction. In addition, the radiation fin 225 is not limited to what is arrange | positioned radially, What is necessary is just to be arrange | positioned at intervals.
The height of the heat dissipating fin 225 is substantially equal to the depth of the cylindrical portion connecting portion 261 over substantially the entire radial direction except for the inner end portion 225A. The inner end portion 225 </ b> A is formed to be inclined so that the height decreases as it approaches the tube portion 264.
In the radial direction, the radiation fins 225 extend from the vicinity of the cylindrical portion 264 of the cylindrical portion connecting portion 261 to the outer peripheral side, and extend outside the outer edge portion 221B (FIG. 17) of the substrate mounting portion 221 of the substrate support plate 220. Protruding. That is, the radiation fin 225 has an outer end portion 225B that protrudes outward in the radial direction from the outer edge portion 221B. Further, a gap 265 is provided between the inner end 225 </ b> A of the radiating fin 225 and the outer peripheral surface of the cylindrical portion 264. By providing the gap 265, air can be circulated around the cylindrical portion connecting portion 261.

A base 3 is attached to the end 230 </ b> B of the tubular portion 230. The cylindrical portion 230 is formed using a resin material having an insulating property such as polycarbonate. Thereby, insulation with the cylindrical part 230 and the nozzle | cap | die 3 is achieved. According to this structure, weight reduction of the cylindrical part 230 can be achieved by shape | molding the cylindrical part 230 with a resin material.
The cylindrical portion 230 may have a configuration in which a member formed of a metal having thermal conductivity and a member formed of an insulating material are formed by insert molding.

The electric circuit board 50 (FIG. 17) is held by the board holder 55 and stored inside the cylindrical portion 230. The electric circuit board 50 is electrically connected to the base 3 through a lead wire (not shown) at the end on the base 3 side. As shown in FIGS. 16 and 17, the substrate holder 55 is inserted and fixed in the cylindrical portion 230 in a state where the electric circuit substrate 50 is sandwiched.
The base 3 includes a cylindrical shell 6 that is threaded into a socket 290 (FIG. 23) of an existing lighting fixture (not shown), and an insulating portion 4 at the top of the end of the shell 6. The shell 6 and the eyelet 5 are configured to have a shape and size that can be attached to an existing socket. Thereby, the LED lamp 200 can be mounted on an existing socket on the ceiling or wall surface, or a socket of a lamp holder or the like (not shown) that is used by mounting an existing light bulb, and can be used as an alternative to the existing light bulb. An example of the socket is an E26 type socket.

FIG. 18 is a front view of the cylindrical portion 230. 19 is a cross-sectional view taken along line XIX-XIX in FIG. 20 is a sectional view taken along line XX-XX in FIG.
As shown in FIGS. 18 to 20, the cylindrical portion 230 has a cylindrical portion main body 267 in which the electric circuit board 50 is accommodated, a terminal end 230 </ b> B to which the base 3 is fixed, and a rotation prevention member 260 to which the loosening prevention member 260 is attached. A member attaching portion 268 and a connecting portion 269 connected to the tubular portion connecting portion 261 are provided.
The cylindrical portion main body 267 is formed in a regular polygonal cross section (in the present embodiment, a regular octagon), and is the portion that occupies the longest length in the axial direction of the cylindrical portion 230. Moreover, the cylindrical part main body 267 is formed in the taper shape which tapers toward the nozzle | cap | die 3 side. Holes 285A and 285B to which lead wires (not shown) extending from the electric circuit board 50 to the base 3 are connected are formed at the bottom of the terminal end 230B.
The rotation preventing member attaching portion 268 is formed in a substantially circular cross section, and is formed between the cylindrical portion main body 267 and the terminal end 230B.

  The cylindrical portion 230 is formed by resin molding using a split mold (not shown). The mold parting line is provided in accordance with the position of the regular octagonal corner portion 267A of the cylindrical portion main body 267. Thereby, since the line which appears on the surface of the cylindrical part main body 267 due to the parting line overlaps with the corner part 267A, the line does not stand out and the appearance can be improved. Moreover, since the cylindrical part main body 267 is polygonal, it is easy to grasp the cylindrical part main body 267 by hand, and workability is good.

The connecting portion 269 is provided at the starting end 230 </ b> A of the cylindrical portion 230.
The connecting portion 269 is a first cylindrical portion 271 that fits in the inner peripheral portion of the through-hole 223 of the cylindrical portion connecting portion 261, and a second diameter that is larger than the first cylindrical portion 271. A cylindrical portion 272, a second flange portion 278 that protrudes radially outward from the first cylindrical portion 271 and connects the first cylindrical portion 271 and the second cylindrical portion 272, And a flange portion 231 that protrudes radially outward from the second cylindrical portion 272.

The flange portion 231 is provided on the most starting end side of the tubular portion 230, and the second tubular portion 272 and the second flange portion 278 are formed with the flange portion 231 and the first tube in the axial direction of the tubular portion 230. It is provided between the shape portion 271. The outer diameter of the second flange portion 278 is smaller than the outer diameter of the flange portion 231.
The first tubular portion 271 is formed in a substantially circular cross section and is continuous with the tubular portion main body 267. The lower surface (surface on the base 3 side) of the second flange portion 278 is an annular contact surface 278A.
In the tubular portion 230, the radius of curvature of the corner portion 279 of the connecting portion between the second flange portion 278 and the first tubular portion 271 (the radius of the R portion of the bending portion) is the same as that of the flange portion 231. It is formed larger than the radius of curvature of the corner portion 280 of the connecting portion with the cylindrical portion 272.

FIG. 21 is a plan view of the substrate support plate 220 and the cylindrical portion 230 as viewed from above.
As shown in FIGS. 16, 18, and 21, a wall portion 231 </ b> A that protrudes in the axial direction along the peripheral edge portion of the inner peripheral portion of the flange portion 231 is formed on the upper surface of the flange portion 231. The flange portion 231 is provided with a plurality of ribs 231B that connect the upper surface of the flange portion 231 and the outer surface of the wall portion 231A. The wall portion 231A has a pair of cutout portions 231C in which the wall portion 231A is not provided.
A plurality of boss holes 231D penetrating the flange part 231 are formed on the upper surface of the flange part 231, and a flange part fixing screw 243 for fixing the flange part 231 to the tubular part connecting part 261 is formed in the boss hole 231D (FIG. 16) is inserted.

FIG. 22 is an enlarged view of the vicinity of the connecting portion 269 and the cylindrical portion connecting portion 261 in FIG.
As shown in FIG. 22, the tubular portion 230 is inserted into the through hole 223, and is fixed to the substrate support plate 220 so that the flange portion 231 and the second flange portion 278 are hooked on the tubular portion connection portion 261. The The cylindrical part 264 of the cylindrical part connection part 261 is formed in a stepped manner in accordance with the shapes of the flange part 231 and the second flange part 278 of the cylindrical part 230.
Specifically, the cylindrical portion connecting portion 261 has a first recess 273 in which the center portion of the substrate mounting portion 221 is recessed toward the base 3 side, and a center portion of the first recess 273 is recessed toward the base 3 side. The second concave portion 274 and the fitting cylinder portion 275 extending from the central portion of the second concave portion 274 to the base 3 side are provided. The through hole 223 is configured by the inner peripheral part of the fitting cylinder part 275.

The flange portion 231 is accommodated in the first recess 273. The inner diameter of the first recess 273 is slightly larger than the outer diameter of the flange portion 231, and the bottom 273 </ b> A of the first recess 273 that receives the flange portion 231 is formed flat. A plurality of fixing hole portions 273B (FIG. 21) to which the flange portion fixing screws 243 are fastened are formed in the bottom portion 273A which is also the peripheral portion of the through hole 223.
A flat and ring-shaped heat insulating member 276 (heat insulating material) is interposed between the flange portion 231 and the bottom portion 273A. As the heat insulating member 276, for example, a nonwoven fabric, silicon packing, or the like is used. By providing the heat insulating member 276, heat insulation between the substrate support plate 220 and the flange portion 231 can be ensured, and the influence such as deterioration of the flange portion 231 due to heat transmitted from the substrate support plate 220 can be reduced. Furthermore, since the heat insulating member 276 functions as a vibration isolating member by bending, the influence of vibration acting on the flange portion 231 can be reduced.

The second cylindrical portion 272 and the second flange portion 278 are accommodated in the second recess 274. The inner diameter of the second recess 274 is slightly larger than the outer diameter of the second cylindrical portion 272, and the bottom 274A of the second recess 274 that receives the contact surface 278A of the second flange portion 278. Is formed flat.
A ring-shaped seal member 277 (waterproof packing) made of an elastic material is fitted to the outer peripheral surface of the first cylindrical portion 271, and the seal member 277 has a contact surface 278A and a bottom portion 274A. It is inserted in a compressed state. As the seal member 277, for example, a packing made of a material such as rubber is used. By providing the seal member 277, the waterproof property between the substrate support plate 220 and the second cylindrical portion 272 can be secured, and the seal member 277 also functions as a vibration isolating member by being bent. The influence of vibration acting in the vicinity of the second cylindrical portion 272 can also be reduced. Here, the sealing member 277 may have a heat insulating property in addition to the sealing property. That is, the heat insulating material can be provided between the flange portion 231 and / or the second flange portion 278 and the substrate support plate 220.

When connecting the cylindrical portion 230 to the substrate support plate 220, first, the seal member 277 and the heat insulating member 276 are respectively attached to the first cylindrical portion 271 and the flange portion 231 of the cylindrical portion 230. Next, the cylindrical portion 230 is passed through the through hole 223, and the flange portion 231 and the second flange portion 278 are hooked on the first recess portion 273 and the second recess portion 274. Thereafter, the flange portion fixing screw 243 (FIG. 16) is fastened to the fixing hole portion 273B (FIG. 21), whereby the connecting portion 269 is fixed to the cylindrical portion connecting portion 261.
Further, as shown in FIG. 16, the substrate holder 55 has a bridge portion (not shown) that passes through the notch portion 231C (FIG. 21) of the flange portion 231 at the upper end, and a flange portion fixing screw is attached to the bridge portion. By inserting 243, the flange portion 231 is fastened together and fixed.

  In the second embodiment, since the substrate support plate 220 is made of metal, high heat dissipation performance is obtained, but the weight is large. The cylindrical portion 230 fixed to the substrate support plate 220 by the flange portion fixing screw 243 is formed of a resin whose strength is likely to be lower than that of metal. Therefore, the cylindrical portion 230 is likely to be subjected to a load due to the weight of the substrate support plate 220 on the boss hole 231D (FIG. 21) into which the flange portion fixing screw 243 is inserted. Moreover, the cylindrical part 230 shape | molded with the resin material may deteriorate by external factors, such as an ultraviolet-ray and a vibration, and intensity | strength may fall. Due to these factors, the flange portion 231 may be cracked from the boss hole 231D.

According to the configuration of the present application, the cylindrical portion 230 is inserted into the through hole 223 of the substrate support plate 220, and the flange portion 231 of the cylindrical portion 230 is hooked on the bottom portion 273 </ b> A of the first concave portion 273 on the outer peripheral side of the through hole 223. Thus, the cylindrical portion 230 is fixed to the substrate support plate 220. Thereby, even if a crack due to deterioration occurs in the vicinity of the boss hole 231D, the flange portion 231 is caught, so that the substrate support plate 220 is not detached from the cylindrical portion 230, and the connection function can be prevented from being lost. Further, even if the flange portion 231 is damaged, the second flange portion 278 of the cylindrical portion 230 is hooked on the second concave portion 274, so that the substrate support plate 220 may be detached from the cylindrical portion 230. Therefore, it is possible to prevent the connection function from being lost.
Further, since the radius of curvature of the corner portion 279 on the second flange portion 278 side is formed larger than the radius of curvature of the corner portion 280 on the flange portion 231 side, the strength of the second flange portion 278 is high. For this reason, the damage of the 2nd flange part 278 can be prevented, and the connection function by the 2nd flange part 278 can be maintained.

  Further, since the flange portion 231 and the second flange portion 278 of the cylindrical portion 230 are fixed to the first recess portion 273 and the second recess portion 274 that are recessed in the substrate mounting portion 221, the flange portion 231 and the second flange portion 274 are fixed. The second flange portion 278 does not directly touch the LED substrate 211 placed on the substrate placement portion 221. Thereby, it can prevent that the flange part 231 and the 2nd flange part 278 comprised with a resin material become thermal resistance of the LED board 211, and can thermally radiate the heat | fever of the LED board 211 from the radiation fin 225 efficiently. .

In addition, since the tubular portion 230 is disposed in the tubular portion connecting portion 261 apart from the LED substrate 211, the tubular portion 230 made of a resin material does not directly touch the LED substrate 211 that becomes high temperature. In addition, it is possible to prevent problems such as deformation and deterioration due to heat from occurring in the tubular portion 230.
In addition, the substrate support plate 220 includes a substrate mounting portion 221, a cylindrical portion connection portion 261, and a radiation fin 225 that are integrally formed by casting. Therefore, the substrate support plate 220 can be easily manufactured while increasing the strength of the substrate support plate 220, and further, heat resistance can be reduced by integration, so that heat can be effectively radiated from the radiation fins 225.

Next, the configuration around the radiation fin 225 will be described in detail.
As shown in FIGS. 14, 17, and 21, the outer diameters of the outer edge portion 221 </ b> B of the substrate platform 221 and the outer peripheral flange portion 214 of the globe 212 are formed to be substantially equal. The outer edge and the outer edge portion 221B substantially overlap each other.
The outer end portion 225 </ b> B of the radiation fin 225 protrudes outward in the radial direction from the outer edge portion 221 </ b> B of the substrate platform 221, and also protrudes outward in the radial direction with respect to the outer edge of the globe 212.

  As shown in FIGS. 13 to 17, the heat radiation fin 225 includes a cylindrical connecting portion 281 that connects the distal end portion 225 </ b> C in the radial direction of the outer end portion 225 </ b> B in the circumferential direction and surrounds the substrate mounting portion 221 from the outside. . The connecting portion 281 is a thin plate formed to have the same thickness as the heat radiation fin 225 or thinner than the heat radiation fin 225 in a plan view, and also functions as a heat radiation fin. The radiating fins 225 are connected to each other by the connecting portion 281, thereby increasing the strength. In particular, since the connecting portion 281 is provided at the outermost end portion 225C, the strength of the radiating fin 225 can be effectively increased.

The connecting portion 281 is connected to the tip end portion 225C, and the upper end 225D (FIG. 16) of the radiating fin 225 protrudes slightly above the upper edge 281A of the connecting portion 281. Further, the connecting portion 281 is provided on the upper end 225D side with respect to the upper and lower intermediate portions in the height direction of the heat dissipating fins 225, and is not provided on the lower end 225E side of the heat dissipating fins 225.
By closing the tip of the outer end portion 225B of the heat dissipating fin 225 with the connecting portion 281, the substrate mounting portion 221 is surrounded by the adjacent heat dissipating fins 225, 225, the outer edge portion 221 B, and the connecting portion 281. A plurality of substantially rectangular openings 282 are formed in plan view. The airflow flowing around the radiating fin 225 flows in the axial direction of the cylindrical portion 230 through the opening 282. In the present embodiment, since the connecting portion 281 is provided at the tip portion 225C of the radiating fin 225, the connecting portion 281 does not get in the way and the opening 282 can be formed large. For this reason, an airflow can be smoothly flowed to the opening 282, and it can thermally radiate efficiently.

  The connecting portion 281 has cutout portions 283 and 283 that cut out a part of the cylindrical shape to open the opening 282 to the outer peripheral side. Specifically, the notch portions 283 and 283 are provided in such a manner that the pair of notch portions 283 and 283 are substantially opposed to each other, that is, at a position different by approximately 180 ° in the circumferential direction. The opening 282 in the portion where the notches 283 and 283 are provided becomes open portions 284 and 284 that are open to the outer peripheral side. That is, the connecting portion 281 does not connect the front end portions 225C of all the heat dissipating fins 225, but connects the front end portions 225C of the adjacent heat dissipating fins 225 except for some of the heat dissipating fins 225.

The opening portions 284 and 284 are provided at locations that do not overlap the cover fixing portion 262. Since airflow also flows from the outer peripheral side to the open portions 284 and 284, heat can be effectively radiated by the radiation fins 225 of the open portion 284.
The open portions 284 and 284 are used as positioning portions into which a jig (not shown) for positioning the substrate support plate 220 is fitted when the LED lamp 200 is assembled. For this reason, it is not necessary to provide a dedicated positioning part, and the structure can be simplified. Even if the jig is not used, the open portions 284 and 284 can be positioned as the reference position marks.

The cover fixing portion 262 to which the outer peripheral flange portion 214 of the globe 212 is fixed is provided at the upper end 225D of the adjacent outer end portions 225B and 225B so as to block a part of the openings 282. A plurality of cover fixing portions 262 are arranged at substantially equal intervals in the circumferential direction, and the opening 282 is arranged between adjacent cover fixing portions 262 and 262.
The outer edge of the cover fixing portion 262 is connected to the upper edge 281A of the connecting portion 281. For this reason, the rigidity of the cover fixing portion 262 can be increased by the connecting portion 281, and the globe 212 can be firmly and stably fixed to the cover fixing portion 262.

  As shown in FIG. 15, the screw hole portion 221A and the boss portion 262A are arranged at positions overlapping the heat dissipating fins 225 in a plan view, and the bottom portions of the screw hole portion 221A and the boss portion 262A are located on the substrate mounting portion 221. It protrudes downward from the back surface and is integrally formed with the radiation fin 225. Thus, since the screw hole portion 221A and the boss portion 262A are integrally provided with the heat radiation fin 225, the bottom portions of the screw hole portion 221A and the boss portion 262A do not block the flow path between the heat radiation fins 225 and 225. For this reason, an airflow can be smoothly flowed to the radiation fin 225, and heat dissipation is good. In addition, the bottom of the screw hole portion 221A and the boss portion 262A is hidden by the heat radiating fins 225, so that the appearance is good.

The connecting portion 281 is integrally formed with the heat radiation fin 225 when the substrate support plate 220 is cast. For this reason, the thermal resistance between the radiating fin 225 and the connecting portion 281 can be reduced, high heat dissipation can be obtained, and high strength can be obtained.
Further, when the substrate support plate 220 is cast, hot water flows to the heat radiating fins 225 via the connecting portions 281, and the hot water is easily distributed to the heat radiating fins 225, so that the castability is good.

Next, the configuration around the loosening prevention member 260 will be described in detail.
FIG. 23 is a bottom perspective view of the LED lamp 200 with the socket 290 attached. FIG. 24 is a cross-sectional view showing a connection portion between the socket 290 and the base 3.
As shown in FIGS. 23 and 24, the socket 290 is formed in a container shape with one end opened, and has a bottomed cylindrical socket body 291 and a connection opening 292 into which the base 3 is inserted. . A socket (not shown) as a female screw portion to which the base 3 is fastened is provided in the socket main body portion 291. For example, the socket 290 has a bottom portion installed on the ceiling, and the LED lamp 200 connected through the connection opening 292 is installed so as to illuminate the lower side.

As shown in FIGS. 16 and 24, a diameter-enlarged portion 293 that protrudes in the radial direction like a bowl is formed at the end of the anti-rotation member mounting portion 268 on the light emitting portion 210 side in the tubular portion 230. The enlarged diameter portion 293 includes a pair of groove portions 293A formed so as to be partially cut away.
The loosening prevention member 260 is fitted and attached to the outer periphery of the rotation prevention member attaching portion 268, and is provided in a compressed state between the enlarged diameter portion 293 and the peripheral edge portion 292A of the connection opening 292 of the socket 290.

FIG. 25 is a plan view of the loosening prevention member 260 viewed from the enlarged diameter portion 293 side. FIG. 26 is a plan view of the loosening prevention member 260 viewed from the socket 290 side. FIG. 27 is a perspective view of the loosening prevention member 260. 28 is a sectional view taken along line XXVIII-XXVIII in FIG.
As shown in FIGS. 24 to 28, the loosening prevention member 260 is a ring-shaped member that is attached to the cylindrical portion 230 in a coaxial positional relationship. The loosening prevention member 260 includes a ring body portion 294 that is substantially circular in plan view, and a fitting hole portion 295 that is formed at the center of the ring body portion 294 and fits into the rotation prevention member mounting portion 268.
On the inner peripheral surface of the fitting hole 295, an annular protrusion 295A that protrudes radially inward over the entire periphery is formed. A plurality of protrusions 295 </ b> A are formed in the axial direction of the fitting hole 295.

The ring body 294 includes a lamp-side contact surface 296 that contacts the lower surface of the enlarged diameter portion 293, and a socket-side contact surface 297 that contacts the peripheral portion 292A of the socket 290 on the back side of the lamp-side contact surface 296. Abutting portion).
A chamfered portion 298 of approximately 45 ° is formed at the corner on the lamp-side contact surface 296 side in the outer peripheral portion of the ring main body portion 294. An end of the chamfered portion 298 on the lamp side contact surface 296 side is located closer to the lamp side contact surface 296 than an intermediate portion in the thickness direction of the ring main body portion 294.
A pair of convex portions 299 (engaging portions) protruding in the axial direction of the ring main body portion 294 are formed on the peripheral edge portion of the fitting hole portion 295 on the lamp side contact surface 296. The convex part 299 engages with the groove part 293 </ b> A of the enlarged diameter part 293 of the cylindrical part 230 and restricts the rotation of the loosening prevention member 260.

The socket-side contact surface 297 of the ring body 294 is formed with a plurality of substantially trapezoidal hole portions 300 that taper toward the fitting hole 295 in plan view at substantially equal intervals in the circumferential direction of the ring body 294. ing. The depth of the hole 300 reaches approximately half of the thickness of the ring main body 294.
By forming the hole portion 300, the socket-side contact surface 297 side has an annular inner peripheral wall portion 301 extending along the inner peripheral surface of the fitting hole portion 295 and an outer periphery of the ring main body portion 294. An annular outer peripheral wall 302 that extends, and a connection wall 303 (rotation preventing means) that connects the inner peripheral wall 301 and the outer peripheral wall 302 are formed. The outer peripheral wall portion 302 and the inner peripheral wall portion 301 respectively constitute an outer peripheral portion of the ring main body portion 294 and a part of the fitting hole portion 295 on the socket side contact surface 297 side.

The connecting wall 303 is a plate-like member that is arranged radially with the fitting hole 295 as the center, and connects the inner peripheral wall 301 and the outer peripheral wall 302 in the radial direction. The connecting wall 303 is a plate-like convex portion that is erected from the bottom surface of the hole 300.
The thickness of the connecting wall 303 is smaller than the circumferential width of the hole 300. Further, the thickness of the connecting wall 303 is smaller than the thickness of the inner peripheral wall 301 and the outer peripheral wall 302. Since the connecting wall part 303 is a thin plate, it deforms relatively easily. The height of the connecting wall portion 303 and the inner peripheral wall portion 301 is formed to be one step lower than that of the outer peripheral wall portion 302.
The diameter of the outer peripheral wall portion 302 is larger than the diameter of the peripheral portion 292A of the socket 290, and the diameter of the inner peripheral wall portion 301 is smaller than the diameter of the peripheral portion 292A of the socket 290. In a state where the socket 290 is attached to the LED lamp 200, the upper end of the connecting wall portion 303 abuts on the peripheral edge portion 292A.

In the bottom of the hole 300, a sloped portion 300A is formed at the corner on the inner peripheral wall 301 side. By providing the build-up portion 300A, the rigidity of the loosening prevention member 260 is ensured while the connection wall portion 303 is provided.
The loosening prevention member 260 is made of, for example, a resin elastic material having a relatively large elasticity such as silicon rubber. The entire slack prevention member 260 including the connecting wall 303 is integrally formed by resin molding.

When the LED lamp 200 is attached to the socket 290, the base 3 of the LED lamp 200 is inserted into the connection opening 292 of the socket 290, and the LED lamp 200 is rotated in the fastening direction F in FIG. Is fastened to a socket 290 (not shown).
When the LED lamp 200 is tightened into the socket 290, the loosening prevention member 260 rotates integrally with the cylindrical portion 230, and the connecting wall portion 303 comes into contact with the peripheral edge portion 292A of the socket 290. Specifically, as the LED lamp 200 is tightened, the connecting wall 303 rotates while being compressed in contact with the peripheral edge 292A of the socket 290, and exerts a force in the opposite direction L opposite to the fastening direction F. Received from the peripheral edge 292A. When receiving the force in the opposite direction L, each connecting wall portion 303 deforms so as to fall in the opposite direction L with the base end portion 303A of the connecting wall portion 303 as a fulcrum.

  That is, as the LED lamp 200 is fastened, the connecting wall portion 303 is bent in the opposite direction L while being compressed in the axial direction. In a state where the LED lamp 200 is completely fastened to the socket 290 and the connecting wall portion 303 is deformed by a predetermined amount (hereinafter, this state is referred to as an anti-rotation state), the deformation of the connecting wall portion 303 is elastic deformation and plastic deformation. There are both. Further, the loosening prevention member 260 mainly deforms the connecting wall 303 largely in the rotation preventing state, and the outer wall 302 is not greatly deformed in appearance.

In the second embodiment, when the loosening prevention member 260 is prevented from rotating, a repulsive force of the deformed connecting wall 303 is generated, and this repulsive force acts on the peripheral portion 292A of the socket 290. This is a resistance to loosening of the LED lamp 200. That is, the connecting wall 303 is deformed so as to suppress the rotation of the LED lamp 200 in the loosening direction as the LED lamp 200 is fastened. For this reason, rotation of the LED lamp 200 in the loosening direction can be prevented, and the fastening of the LED lamp 200 can be prevented from loosening due to vibration or the like.
Further, in the loosening prevention member 260, as the connecting wall 303 is compressed, the fitting hole portion 295 contracts in the radial direction, and the fitting hole portion 295 comes into close contact with the outer peripheral surface of the rotation preventing member attaching portion 268. This also prevents the LED lamp 200 from rotating in the loosening direction.

Furthermore, since the convex portion 299 of the loosening prevention member 260 engages with the groove portion 293A of the enlarged diameter portion 293 and the rotation of the loosening prevention member 260 is restricted, when the LED lamp 200 is fastened, the loosening prevention member 260 is used. Can be reliably rotated integrally with the LED lamp 200. For this reason, the connection wall part 303 can be deformed effectively, and the rotation of the LED lamp 200 in the loosening direction can be prevented.
Further, when the LED lamp 200 is fastened to the socket 290, the connecting wall portion 303 is gradually deformed, and the force necessary to rotate the LED lamp 200 in the fastening direction F is also gradually increased. For this reason, compared with the case where the flat packing which is not equipped with the connection wall part 303 is used, for example, it is easy for an operator to recognize the fastening state. For this reason, it is possible to prevent the LED lamp 200 from being fastened with an excessive tightening force.
Further, since the loosening prevention member 260 made of an elastic material is interposed between the socket 290 and the LED lamp 200, a vibration isolation effect is obtained and the vibration of the LED lamp 200 can be reduced.

  As described above, according to the second embodiment to which the present invention is applied, the cylindrical portion 230 includes the first cylindrical portion 271 inserted into the through hole 223 and the first cylindrical portion 271. And a flange portion 231 and a second flange portion 278 having a larger diameter than the first cylindrical portion 271, and the first recess portion 273 has a smaller diameter than the first recess portion 273. A second recess 274 is provided, and the second flange portion 278 is accommodated in the second recess 274. For this reason, even if the flange portion 231 is damaged, the second flange portion 278 is housed and caught in the second recess 274, so that the substrate support plate 220 can be prevented from falling off the cylindrical portion 230.

Further, the second flange portion 278 that connects the second cylindrical portion 272 provided with the flange portion 231 and the first cylindrical portion 271 can prevent the substrate support plate 220 from falling off with a simple structure.
Further, the radius of curvature of the corner portion 279 of the connecting portion between the second flange portion 278 and the first cylindrical portion 271 is the curvature of the corner portion 280 of the connecting portion between the flange portion 231 and the second cylindrical portion 272. Since it is larger than the radius, the strength of the second flange portion 278 is increased. For this reason, the second flange portion 278 can effectively prevent the substrate support plate 220 from falling off the cylindrical portion 230.

Furthermore, the sealing member 277 provided between the second flange portion 278 and the second recess 274 can ensure waterproofness and also provide a vibration proofing effect.
Further, the heat transmitted from the substrate mounting portion 221 to the flange portion 231 can be reduced by the heat insulating member 276 provided between the flange portion 231 and the first concave portion 273 of the substrate mounting portion 221, and the heat of the flange portion 231 can be reduced. Deterioration can be suppressed.
Further, even if the flange portion 231 is damaged by the boss hole 231D which is a screwing location, the portion of the flange portion 231 other than the boss hole 231D and the second flange portion 278 support the substrate from the cylindrical portion 230. Dropping of the plate 220 can be prevented.

  Further, according to the second embodiment to which the present invention is applied, the substrate mounting portion 221 that holds the LED substrate 211 on which the LED 215 is mounted, the cylindrical portion 230 that extends from the back surface of the substrate mounting portion 221, and the substrate The back surface of the mounting portion 221 includes a plurality of heat radiation fins 225 provided at intervals in the circumferential direction of the tubular portion 230 and a connection portion 281 that connects the heat radiation fins 225 to each other. The outer end portion 225 </ b> B protrudes outward from the substrate mounting portion 221, and the connecting portion 281 connects the end portions 225 </ b> C of the outer end portions 225 </ b> B of the heat dissipating fins 225. For this reason, the strength of the radiation fin 225 can be increased by the connecting portion 281 that connects the front end portions 225C of the outer end portions 225B of the radiation fin 225, and the opening 282 formed by the radiation fin 225 and the connecting portion 281. The air can be efficiently flowed through the opening 282. Therefore, high heat radiation efficiency can be obtained while increasing the strength of the heat radiation fin 225.

Moreover, since the board | substrate mounting part 221, the thermal radiation fin 225, and the connection part 281 are integrally molded, while thermal resistance becomes small and high heat dissipation efficiency is obtained, high intensity | strength is acquired.
In addition, since the connecting portion 281 is connected except for a part of the heat radiating fins 225, air is blown from outside in the radial direction between the open heat radiating fins 225 that are not connected to the connecting portion 281. In addition to obtaining high heat dissipation efficiency, the open portion 284, which is the open opening 282, can be used as a mark for positioning or the like, and the open portion 284 can be used as a fitting portion such as a positioning jig, thereby improving assemblability.
Further, the cover fixing portion 262 for fixing the globe 212 that covers the front side of the substrate placement portion 221 has a plate shape in which the upper ends 225D of the radiation fins 225 are connected to each other, and is connected to the connecting portion 281 of the outer end portion 225B. Therefore, the strength of the cover fixing portion 262 can be reinforced by the connecting portion 281, and the globe 212 can be firmly fixed to the cover fixing portion 262.

  Furthermore, according to the second embodiment to which the present invention is applied, the LED lamp 200 includes the base 3 provided on the cylindrical portion 230, and the base 3 is fastened to the socket 290. The loose prevention member 260 has a socket side contact surface 297 that contacts the peripheral edge 292A of the connection opening 292 of the socket 290, and is provided with a socket side contact surface. 297 includes a connecting wall portion 303 that prevents the LED lamp 200 from rotating. Accordingly, when the socket-side contact surface 297 of the loosening prevention member 260 is brought into contact with the peripheral edge portion 292A of the connection opening 292 of the socket 290, the LED lamp 200 is rotated by the connecting wall portion 303 of the socket-side contact surface 297. Therefore, loosening of the fastening of the LED lamp 200 with respect to the socket 290 can be prevented.

In addition, since the connecting wall portion 303 is a convex portion that protrudes toward the peripheral edge 292A of the socket 290 and contacts the peripheral edge 292A, the rotation of the LED lamp 200 is effectively prevented by the repulsive force of the deformation of the convex portion. it can.
Further, since the connecting wall portion 303 is a plate-like convex portion arranged radially around the cylindrical portion 230, the LED lamp 200 is effectively rotated by the repulsive force of the deformation of the plate-like convex portion. Can be prevented.

Further, since the connecting wall 303 is deformed so as to suppress the rotation of the LED lamp 200 in the loosening direction with the fastening of the LED lamp 200 to the socket 290, the rotation of the LED lamp 200 is caused by the deformation of the connecting wall 303. Can be prevented.
Moreover, the cylindrical part 230 is provided with the enlarged diameter part 293 which protrudes to a radial direction outer side, the loosening prevention member 260 is compressed between the enlarged diameter part 293 and the peripheral part 292A, and the loosening prevention member 260 is expanded in diameter. A convex portion 299 that engages with the portion 293 and restricts the rotation of the loosening prevention member 260 is provided. Thereby, since the rotation of the loosening prevention member 260 can be restricted by the convex portion 299 and the connecting wall portion 303 can be effectively functioned, loosening of the LED lamp 200 with respect to the socket 290 can be prevented.

The second embodiment shows one aspect to which the present invention is applied, and the present invention is not limited to the second embodiment.
In the said 2nd Embodiment, although the cylindrical connection part 281 demonstrated as what was provided with the open part 284 open | released on the outer peripheral side, this invention is not limited to this, For example, the connection part 281 is provided. May be a complete cylinder without the opening 284.
In the second embodiment, the rotation preventing means has been described as being the connecting wall portion 303 that is a plate-like convex portion arranged radially around the cylindrical portion 230. Is not limited to this. For example, the rotation preventing means may be a columnar convex portion that is arranged in a plurality at intervals around the cylindrical portion 230 in place of the connecting wall portion 303.
Moreover, the connection part 281 of the said 2nd Embodiment may be applied to the said 1st Embodiment, and the front-end | tip parts of the radial direction outer end part of the radiation fin 25 may be connected with a connection part.
In addition, the LED lamp 200, the LED substrate 211, the LED 215, the through hole 223, the heat radiation fin 225, the cylindrical portion 230, the terminal end 230, the flange portion 231, the substrate support plate 220, and the first recess according to the second embodiment. Reference numeral 273 denotes the LED lamp 1, the LED substrate 11, the LED 15, the through hole 23, the heat radiation fin 25, the cylindrical portion 30, the terminal end 30, the flange portion 31, the light source holding portion 20, and the concave portion 22 of the first embodiment. Respectively.

1,200 LED lamp (lamp)
3 Base 11, 211 LED board (board)
15,215 LED (light emitting element)
20 Light source holding part 22 Recessed part 22A Bottom part (edge part)
23,223 Through hole 25,225 Radiation fin 30,230 Cylindrical part 30B, 230 Termination 31,231 Flange part 100 Lamp device 101 Power supply unit 110 Lamp holder 220 Substrate support plate (light source holding part)
271 1st cylindrical part 272 2nd cylindrical part 273 1st recessed part (recessed part)
274 Second recess 276 Heat insulating member (heat insulating material)
277 Seal member (waterproof packing)
278 Second flange portion 279 Corner portion 280 Corner portion

Claims (10)

In a lamp provided with a substrate on which a light emitting element is mounted, a light source holding part for placing and holding the board on the surface, and a cylindrical part extending from the back surface of the light source holding part and provided with a base at the end,
The light source holding part is provided with a through-hole penetrating front and back, the cylindrical part is inserted into the through-hole, and a flange part provided on the cylindrical part is fixed to an edge of the through-hole ,
A lamp characterized in that a central portion of the surface of the light source holding portion is recessed to provide a concave portion integrally with the light source holding portion, and the through hole is provided at the bottom of the concave portion .   The lamp according to claim 1, wherein the cylindrical portion is formed of an insulating material, and the light source holding portion is formed of a metal having heat dissipation properties. The light source holding unit, the lamp according to claim 1 or 2, characterized in that it comprises a plurality of heat radiation fins on the back. The radiating fin is provided on the back surface of the mounting portion of the light source holding portion on which the substrate is mounted, and is formed with a gap between the concave portion in the radial direction of the cylindrical portion. The lamp according to claim 3. Said tubular portion has a first cylindrical portion that is inserted into the through hole, the first cylindrical portion provided between the flange portion, the large diameter than the first cylindrical portion A second flange portion,
The recess is provided with a second recess having a smaller diameter than the recess,
The lamp according to any one of claims 1 to 4 , wherein the second flange portion is accommodated in the second recess.   The tubular portion includes a second tubular portion having a diameter larger than that of the first tubular portion and to which the flange portion is coupled, and the second tubular portion, the first tubular portion, The lamps according to claim 5, wherein the lamps are connected by the second flange portion having a smaller diameter than the flange portion.   The radius of curvature of the corner of the connecting portion between the second flange portion and the first cylindrical portion is larger than the radius of curvature of the corner of the connecting portion between the flange portion and the second cylindrical portion. The lamp of claim 6, wherein the lamp is large.   The lamp according to any one of claims 5 to 7, wherein a waterproof packing is provided between the second flange portion and the second concave portion.   The lamp according to any one of claims 1 to 8, wherein a heat insulating material is provided between the flange portion and / or the second flange portion and the light source holding portion.   The lamp according to claim 1, wherein the flange portion is screwed to an edge portion of the through hole.

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