JP6136004B2 - lamp - Google Patents

Description

  The present invention relates to a lamp provided with a light emitting module using a semiconductor light emitting element such as an LED (Light Emitting Diode) as a light source.

In recent years, the above lamps are becoming popular as an alternative to incandescent bulbs. A lamp 900 shown in FIG. 15 as an example includes a light emitting module 910, a base 920, a circuit unit 940, a circuit case 950, a body 960, a base 980, a globe 990, and the like (Patent Document 1).
In the lamp 900, the light emitting module 910 is mounted on the mounting surface 922a of the plate-like base 920. If the posture of the base 920 is normal, the mounting surface 922a should be orthogonal to the lamp axis J (the posture of the base 920 shown in FIG. 15 is not normal), and the light emitting module is mounted on the mounting surface 922a. By simply mounting 910, the main emission direction L of the light emitting module 910 can be determined in a direction parallel to the lamp axis J. The light emitted from the light emitting module 910 emitted in a direction parallel to the lamp axis J is incident on the inner surface 992 of the globe 990 that covers the light emitting module 910, passes through the globe 990, and is extracted outside.

  The circuit unit 940 is arranged in a state of being accommodated in a cylindrical circuit case 950 on the opposite side of the light emitting module 910 with the base 920 interposed therebetween. A cylindrical body 960 is externally fitted to the circuit case 950, and a base 920 is fixed in the opening of the upper end portion 961 in the cylinder axis direction of the body 960. A base 980 is attached to the lower end portion of the body 960 in the cylinder axis direction via a circuit case 950. Heat generated in the light emitting module 910 is conducted to the base 980 via the base 920 and the body 960 and is dissipated from the base 980 to the outside of the lamp 900.

International Publication WO2013 / 031043

  In the lamp 900 having the above-described configuration, when the mounting surface 922a is not orthogonal to the lamp axis J, the main emission direction L of the light emitting module 910 is parallel to the lamp axis J as shown in FIG. Therefore, the light emitted from the light emitting module 910 does not enter the inner surface 992 of the globe 990 as designed. If it does so, the brightness nonuniformity will arise in the globe 990, and the light distribution characteristic of the lamp 900 and the design property of the lamp 900 at the time of lighting will deteriorate.

  Such a problem occurs when the base 920 is fixed in a posture inclined with respect to the body 960. Although the base 920 is fixed to the body 960 by caulking or the like, the inclination of the plate-like base 920 set in the opening of the cylindrical axial upper end 961 of the cylindrical body 960 is determined at the time of fixing. It's not easy. For this reason, there are not a few cases in which the inclination of the base 920 is noticed only when the brightness unevenness occurs when the completed lamp 900 is turned on. In this case, the completed lamp 900 is disassembled and the base 920 is disassembled. Since it is not realistic to correct the inclination, this is one of the causes of defective products.

  An object of this invention is to provide the lamp | ramp which is easy to fix a base with an appropriate attitude | position with respect to a body in view of an above-described subject.

  The lamp according to the present invention has a light emitting module as a light source, a base on which the light emitting module is mounted, a circuit unit for lighting the light emitting module, and a cylindrical shape, and the circuit unit is accommodated therein. And a circuit case having one end in a cylinder axis direction directed to the base, and is cylindrical, and is externally fitted to the circuit case, and the base is fixed to one end in the cylinder axis direction. A body, and at least one convex portion provided on one end of the circuit case facing the one end in the cylinder axis direction and the one end of the base in the cylinder axis direction of the circuit case. At least one concave portion is provided on the other side, and the base is assembled to the circuit case by pressing the convex portion into the concave portion.

Since the lamp according to one embodiment of the present invention has a configuration in which the base is assembled to the circuit case by pressing the convex portion into the concave portion, the base is easily fixed to the body in an appropriate posture.
If the base is not assembled to the circuit case as in the past, the circuit case and the base may be tilted separately without affecting each other (for example, the circuit case is not tilted) In some cases, only the base is tilted), and the posture of the circuit case is difficult to reference when determining the tilt of the base.

  On the other hand, in the lamp according to one aspect of the present invention, since the base is assembled to the circuit case, when the base is tilted, the circuit case is also tilted and when the base is not tilted. The circuit case is not tilted, and the posture of the circuit case can be used as a reference when determining the tilt of the base. Therefore, when fixing the base to the body, there is a high possibility that you will notice the tilt of the base, and if you notice the tilt before fixing, you can also correct the tilt. It can be said that it is easy.

Front sectional view showing a lamp according to the first embodiment The disassembled perspective view which shows the lamp | ramp which concerns on 1st Embodiment. The perspective view for demonstrating the mode of the assembly | attachment to the circuit case of the base which concerns on 1st Embodiment The bottom view of the base concerning a 1st embodiment The top view of the circuit case concerning a 1st embodiment The perspective view which shows a part of manufacturing process of the lamp | ramp which concerns on 1st Embodiment. The perspective view of the base which concerns on the modification 1 of 1st Embodiment. The perspective view of the base which concerns on the modification 2 of 1st Embodiment. The perspective view for demonstrating the aspect of the assembly | attachment to the circuit case of the base which concerns on the modification 3 of 1st Embodiment. The perspective view for demonstrating the aspect of the assembly | attachment to the circuit case of the base which concerns on 2nd Embodiment. Sectional drawing which shows the lamp | ramp which concerns on 2nd Embodiment. The perspective view for demonstrating the aspect of the assembly | attachment to the circuit case of the base which concerns on 3rd Embodiment. The perspective view for demonstrating the aspect of the assembly | attachment to the circuit case of the base which concerns on 4th Embodiment Sectional drawing which shows the lamp | ramp which concerns on 5th Embodiment Sectional drawing which shows the lamp | ramp which concerns on a prior art example

Hereinafter, a lamp according to an embodiment of the present invention will be described with reference to the drawings.
<First Embodiment>
[Schematic configuration]
FIG. 1 is a front sectional view showing a lamp according to the first embodiment. As shown in FIG. 1, a lamp 1 according to the first embodiment is an LED lamp that is an alternative to an incandescent bulb, and has an external shape approximate to that of an incandescent bulb.

FIG. 2 is an exploded perspective view showing the lamp according to the first embodiment. As shown in FIG. 2, the lamp 1 includes a light emitting module 10, a base 20, an optical member 30, a circuit unit 40, a circuit case 50, a body 60, a cover 70, a base 80, a globe 90, and the like. The lamp 1 has the globe 90 side on the upper side and the base 80 side on the lower side.
[Basic configuration of each member]
(Light emitting module)
The light emitting module 10 is a light source of the lamp 1 and includes, for example, a substantially annular mounting substrate 11 and a plurality of light emitting units 12 arranged in an annular shape on the upper surface 11 a of the mounting substrate 11.

  The mounting substrate 11 is a metal base substrate made of, for example, a resin plate and a metal plate, and a wiring pattern (not shown) is formed on the upper surface 11a. Each light emitting unit 12 is, for example, a GaN LED emitting blue light sealed with a transparent silicone resin mixed with phosphor particles that convert blue light into yellow light. White light obtained by color mixing with light is emitted.

Each light emitting unit 12 is substantially rectangular in plan view, and is arranged radially so that the longitudinal direction of each light emitting unit 12 coincides with the radial direction of the mounting substrate 11. On the upper surface 11a of the mounting substrate 11, a connection terminal 13 is disposed inside a ring composed of a plurality of light emitting units 12, and the connection terminal 13 is electrically connected to each light emitting unit 12 through the wiring pattern. It is connected.
(Base)
As shown in FIG. 1, the base 20 includes a substantially disc-shaped main body 22 having a substantially cylindrical cavity 21 on the lower side, and an annular bowl provided on the lower portion of the outer periphery of the main body 22. Part 23. The upper surface of the main body portion 22 is a plane orthogonal to the lamp axis J (coincident with the screwing axis of the base 80), and is a mounting surface 22a on which the light emitting module 10 is mounted. The light emitting module 10 is mounted substantially at the center of the mounting surface 22a such that the lower surface 11b of the mounting substrate 11 is in surface contact with the mounting surface 22a. Since the mounting surface 22a is a plane orthogonal to the lamp axis J, the mounting substrate 11 is set in a posture orthogonal to the lamp axis J simply by installing the mounting substrate 11 so that the lower surface 11b is in surface contact with the mounting surface 22a. Can do.

  The base 20 is preferably formed of a material having excellent thermal conductivity such as a metal, and is formed of aluminum in the present embodiment. Other suitable metals for forming the base 20 include pure metals composed of a single metal element such as tin, zinc, indium, iron, copper, silver, nickel, rhodium, palladium, and a plurality of metal elements. And alloys composed of metallic elements and nonmetallic elements. Since the lower surface 11b of the mounting substrate 11 is in surface contact with the mounting surface 22a, the heat generated in the light emitting module 10 is easily conducted to the base 20.

  Note that if the base 20 is formed of a material having excellent thermal conductivity and excellent electrical insulation, electrical insulation between the light emitting module 10 and the circuit unit 40 can be ensured. Such materials include polypropylene, polypropylene sulfide, polycarbonate, polyetherimide, polyphenylene sulfide, polyphenylene oxide, polysulfone, polybutylene terephthalate, polyamide, polyethylene terephthalate, polyethersulfone, polyphthalamide, and other resin materials, and ceramics. Materials and the like.

(Optical member)
The optical member 30 is a member for widening the light distribution angle of the lamp 1, and is formed of, for example, a resin material such as polycarbonate, a translucent material such as glass or ceramic, and the mounting substrate 11 of the light emitting module 10. Is placed on the upper surface 11a. The optical member 30 has an external shape such that two substantially truncated cones are stacked in the vertical direction, and a substantially cylindrical through-hole 31 penetrating in the vertical direction is provided at the center. Since a part of the light emitted from each light emitting unit 12 is guided obliquely downward by the optical member 30, the lamp 1 has a wide light distribution angle.

  In the through hole 31 of the optical member 30, the connection terminal 13 of the light emitting module 10 is disposed. As shown in FIG. 2, an extending portion 32 having a screw hole 32 a is provided in the through hole 31. The optical member 30 and the light emitting module 10 are fixed to the base 20 by screwing together using the screws 2. Specifically, the screw 2 is inserted into the hole 32 a of the optical member 30 and the hole 14 of the mounting substrate 11, and the screw 2 is further screwed into the screw hole 24 of the base 20. Yes.

Note that the lamp according to the present invention does not necessarily require the optical member 30 and may have a configuration without the optical member 30.
(Circuit unit)
The circuit unit 40 includes, for example, a circuit board 41 and various electronic components 42 mounted on the circuit board 41, and is disposed on the opposite side of the light emitting module 10 with the base 20 interposed therebetween. The circuit unit 40 is accommodated inside the circuit case 50 in a posture in which the main surface of the circuit board 41 is kept parallel to the lamp axis J, that is, a so-called vertical posture. The circuit unit 40 and the light emitting module 10 are electrically connected via a lead wire 43, and the circuit unit 40 and the base 80 are electrically connected via a lead wire 44.

(Circuit case)
The circuit case 50 has, for example, a substantially cylindrical shape having a large diameter part 51 and a small diameter part 52, and is disposed on the opposite side of the light emitting module 10 with the base 20 interposed therebetween. As shown in FIG. 1, the cylinder axis of the circuit case 50 coincides with the lamp axis J, and the cylinder axis direction upper end portion 53 located on the large diameter portion 51 side is directed to the base 20 side. Most of the circuit unit 40 is accommodated inside the large diameter portion 51, and a base 80 is fitted on the small diameter portion 52. The circuit case 50 is formed of an insulating material such as resin or ceramic, for example, and ensures electrical insulation between the circuit unit 40 housed inside and the body 60 fitted outside.

  A pair of rail portions 55 are formed on the inner peripheral surface 54 of the large-diameter portion 51 of the circuit case 50, and a pair of rail grooves 55 a are provided on the pair of rail portions 55 so as to face each other. ing. The pair of rail grooves 55a are for fixing the circuit board 41 of the circuit unit 40 to the circuit case 50, and both side edges of the circuit board 41 are fitted into the pair of rail grooves 55a, so that the circuit The unit 40 is fixed in a vertical posture.

  The pair of rail grooves 55a are not opposed to each other with the lamp shaft J interposed therebetween, but are opposed to each other without sandwiching the lamp shaft J, and both rail grooves 55a are biased to one side with respect to the lamp shaft J. It is arranged to be a position. In other words, when the inside of the large-diameter portion 51 is divided into two spaces on a virtual plane including the lamp axis J, both rail grooves 55a are arranged so as to be accommodated in one space. Therefore, in a state where the circuit board 41 is fixed to the rail grooves 55a, the circuit board 41 is not arranged on the lamp shaft J, that is, in the center of the large diameter portion 51, and is shifted to one side with respect to the lamp shaft J. Placed in a different position. Therefore, the inside of the large-diameter portion 51 is partitioned by the circuit board 41 into a wide space on one main surface side and a narrow space on the other main surface side. Thereby, a taller electronic component can be arranged on one main surface side. The lamp according to the present invention may have a configuration in which the pair of rail grooves 55a are opposed to each other with the lamp axis J interposed therebetween.

The circuit case 50 is not limited to a substantially cylindrical shape, and may be, for example, a substantially elliptical cylinder shape or a substantially rectangular tube shape. Further, the shape of the large-diameter portion 51 of the circuit case 50 is not limited to the shape reduced in diameter from the upper side to the lower side, and may be a shape having a uniform diameter along the lamp axis J. It may be a shape whose diameter is expanded from the bottom to the bottom.
(body)
The body 60 is, for example, a substantially cylindrical shape that is open on both the upper and lower sides and has a diameter reduced from the upper side to the lower side, and the large diameter of the circuit case 50 with the cylinder axis of the body 60 coinciding with the lamp axis J. The part 51 is externally fitted. The base 20 is fixed to the cylinder shaft upper end 61 of the body 60 so as to close the opening of the cylinder 60 upper end 61 of the body 60. The inner diameter of the body 60 is slightly larger than the outer diameter of the circuit case 50 over the entire lamp axis J direction, and a cylindrical gap is formed between the body 60 and the circuit case 50. Heat is difficult to conduct to the circuit case 50.

  The body 60 is made of a material having excellent thermal conductivity such as a metal, and also functions as a heat sink. The outer peripheral surface 23 a of the flange portion 23 of the base 20 has a tapered shape with a diameter reduced from the upper side to the lower side in accordance with the shape of the inner peripheral surface 62 of the body 60. Surface contact. Thus, since the base 20 and the body 60 are in surface contact, the heat generated in the light emitting module 10 is efficiently conducted from the base 20 to the body 60. The body 60 is preferably formed of a material having excellent thermal conductivity such as a metal, like the base 20, and is formed of aluminum in the present embodiment.

  A plurality of caulking holes 23b for fixing the body 60 to the base 20 are formed along the circumferential direction on the outer peripheral surface 23a of the flange portion 23 of the base 20, and by using these caulking 23b holes, 60 is fixed to the base 20 by caulking (the drawing shows a state where it is not caulked). Since the upper end portion 61 of the body 60 in the cylinder axis direction protrudes toward the globe 90 side from the flange portion 23 of the base 20, it is between the main body portion 22 of the base 20 and the upper end portion 71 of the cover 70 in the cylindrical axis direction. Is formed with a groove 3. An opening 91 of the globe 90 is fitted into the groove 3, and the adhesive 4 is filled in the groove 3, whereby the globe 90 is fixed to the base 20 and the body 60. Has been.

The body 60 is not limited to a substantially cylindrical shape, and may be, for example, a substantially elliptical cylinder shape or a substantially rectangular tube shape. Further, the shape of the body 60 is not limited to the shape reduced in diameter from the upper side to the lower side, and may be a shape having a uniform diameter along the lamp axis J, or from the upper side to the lower side. The diameter may be increased.
(cover)
The cover 70 has, for example, a substantially cylindrical shape that is open at both upper and lower ends and has a diameter reduced from the upper side toward the lower side, and is formed of a material having excellent insulating properties such as a resin. Inside the cover 70, the base 20, most of the circuit unit 40, the large-diameter portion 51 of the circuit case 50, the body 60, and the opening-side end portion 91 of the globe 90 are accommodated. The cylinder axis direction upper end portion 71 of the cover 70 protrudes above the cylinder axis direction upper end portion 61 of the body 60 and is in contact with the globe 90. Therefore, the adhesive filled in the groove 3 between the main body portion 22 of the base 20 and the cylinder shaft direction upper end portion 61 of the body 60 is difficult to leak to the outside of the cover 70.

(Base)
The base 80 is a member for receiving electric power from the socket of the lighting fixture when the lamp 1 is attached to the lighting fixture and is turned on. In this embodiment, an E26 base that is an Edison type is used. The base 80 includes a shell portion 81 and an eyelet portion 82, and the shell portion 81 and the eyelet portion 82 are electrically connected to the circuit unit 40 by lead wires (not shown), respectively.

The base 80 is not limited to the E26 type, and may be the same Edison type E11 type or E17 type base, or a pin type base having a pin type terminal other than the Edison type (specifically, May be a G-type such as GY or GX) or a base having an L-shaped terminal.
(Glove)
The globe 90 has a shape for an A-type (JIS C7710) lamp, and is made of, for example, a resin material such as polycarbonate, a glass material, or the like. The globe 90 is not limited to a shape for an A-shaped lamp, and may be another shape such as a shape for a G-shaped lamp. The globe 90 may be a clear type or a type subjected to a light diffusion process. As a type subjected to the light diffusion treatment, when the globe 90 is made of a resin material, for example, a light diffusion material may be mixed into the resin material. When the globe 90 is made of a glass material, it is conceivable to form a light diffusion film on the inner surface 92 for improving the light distribution characteristics.

[Main part configuration]
Next, an aspect of assembling the base 20 to the circuit case 50 will be described as a main configuration of the lamp 1 according to the first embodiment.
FIG. 3 is a perspective view for explaining a manner of assembling the base according to the first embodiment to the circuit case. As shown in FIG. 3, the base 20 is provided with three concave portions 25, and the circuit case 50 is provided with three convex portions 56, and each convex portion 56 is disposed in the corresponding concave portion 25. The base 20 is assembled to the circuit case 50 by press-fitting into the circuit case 50 in a one-to-one relationship.

FIG. 4 is a bottom view of the base according to the first embodiment. As shown in FIG. 4, each recess 25 is provided on the inner peripheral surface 21 a of the cavity 21 of the base 20 along the lamp axis J and over the entire vertical direction of the cavity 21. The lower side of each recess 25 is open, and the protrusion 56 of the circuit case 50 is fitted into the recess 25 from the open position.
FIG. 5 is a plan view of the circuit case according to the first embodiment. As shown in FIG. 5, the convex portions 56 are provided at three positions corresponding to the concave portions 25 in the cylindrical axial upper end portion 53 of the circuit case 50. Each convex portion 56 extends upward in parallel with the lamp axis J from the inner peripheral surface 54 of the large-diameter portion 51 of the circuit case 50, and the upper end portion 56 a of the convex portion 56 is longer than the upper end portion 53 in the cylinder axis direction. Also protrudes upward. As for the convex part 56, the outer site | part (part on the opposite side to the lamp-axis J side) in the upper end part 56a fits in the recessed part 25 of the base 20. FIG. The upper end portion 56a of the convex portion 56 has a substantially square cross-sectional shape orthogonal to the lamp axis J.

  As shown in FIG. 3, the concave portion 25 and the convex portion 56 are arranged at positions that are asymmetric with respect to the lamp axis J. Therefore, if the positions of the base 20 and the circuit case 50 in the rotation direction about the lamp axis J do not match, all the convex portions 56 do not fit in the concave portion 25. In other words, by fitting the three convex portions 56 into the corresponding concave portions 25, the alignment of the base 20 and the circuit case 50 in the rotational direction around the lamp axis J is completed.

  On the outer surface (surface opposite to the lamp axis J side) 56 b of the upper end portion 56 a of each convex portion 56, a triangular rib 56 c having a substantially triangular cross-section perpendicular to the lamp axis J extends along the lamp axis J. Articles are provided. The diameter R1 (see FIG. 4) of the virtual circle C1 that overlaps all three groove bottom surfaces 25a of the three concave portions 25 in plan view is the diameter R2 of the virtual circle C2 that overlaps all three top portions 56d of the three triangular ribs 56c. It is smaller than (see FIG. 5) and larger than the diameter R3 (see FIG. 5) of the virtual circle C3 that overlaps all three outer surfaces 56b of the three convex portions 56 in plan view. Therefore, when the upper end portion 56a of the convex portion 56 is fitted into the concave portion 25, the top portion 56d of the triangular rib 56c hits the groove bottom surface 25a and the top portion 56d is crushed. Thereby, the convex portion 56 is pressed into the concave portion 25.

The shape of the rib for press-fitting is not limited to the above. For example, the cross section orthogonal to the lamp axis J may be a substantially semicircular shape. Further, the rib is not always necessary. For example, if the tapered shape is formed such that the upper end portion gradually becomes higher, the convex portion can be pressed into the concave portion without forming the rib.
FIG. 6 is a perspective view illustrating a part of the manufacturing process of the lamp according to the first embodiment. The assembly process of the base 20, the circuit unit 40, the circuit case 50, and the body 60 will be described with reference to FIG.

  First, as shown in FIG. 6A, the circuit unit 40 is placed inside the circuit case 50. After the circuit unit 40 is inserted, the base 20 is assembled to the circuit case 50. This assembly is performed by press-fitting the convex portion 56 of the circuit case 50 into the concave portion 25 of the base 20. At this time, the base 20 is in an appropriate posture with respect to the circuit case 50, that is, the circuit. Adjustment is performed so that the mounting surface 22a of the base 20 is orthogonal to the cylindrical axis of the case 50. The posture of the base 20 with respect to the circuit case 50 can be adjusted by adjusting the degree of fitting of the convex portion 56 into the concave portion 25 at each of the three locations.

  Once the posture is properly adjusted, the base 20 is assembled into the circuit case 50 by press fitting, so that the posture does not easily collapse. For example, the posture of the base 20 with respect to the circuit case 50 is maintained regardless of the posture of the circuit case 50, for example, by turning the circuit case 50 upside down. On the other hand, since the base 20 cannot be moved at all with respect to the circuit case 50, the posture can be corrected if the posture of the base 20 is not appropriate. It is also possible to remove the base 20 from the circuit case 50.

  As shown in FIG. 1, when the base 20 is assembled to the circuit case 50, there is a gap between the upper end portion 56 a of the convex portion 56 and the upper surface 21 b of the cavity 21 of the base 20. In addition, there is a gap between the cylindrical axial upper end 53 of the circuit case 50 and the lower surface 20a of the base 20 (also the lower surface of the flange 23). The base 20 and the circuit case 50 can be thermally expanded due to heat when the lamp is lit, but if this is the case, the dimension between the base 20 and the circuit case 50 is different due to the difference in thermal expansion coefficient between the base 20 and the circuit case 50. Errors can occur. The above gap is for absorbing the dimensional error, and it is difficult for stress to be generated between the base 20 and the circuit case 50, and it is possible to prevent damage to the components due to the generation of stress.

Note that the upper end portion 56 a of the convex portion 56 may be in contact with the upper surface 21 b of the cavity 21 of the base 20. For example, the projecting portions 56 a are fixed so that the mounting surface 22 a is orthogonal to the cylinder axis of the circuit case 50 by bringing the upper end portions 56 a of the three projecting portions 56 into contact with the upper surface 21 b of the cavity 21 of the base 20. In addition, the size and shape of the recess 25 may be determined.
Next, as shown in FIG. 6B, the assembly 4 in which the base 20 and the circuit case 50 are integrated is inserted into the body 60, and the large-diameter portion 51 of the circuit case 50 is inside the body 60. The small diameter portion 52 is projected from the lower side of the body 60.

  Finally, as shown in FIG. 6C, the posture of the circuit case 50 with respect to the body 60 is adjusted so that the cylinder axes of both the body 60 and the circuit case 50 are substantially coincident with each other. At that time, it is confirmed whether the small diameter portion 52 of the circuit case 50 protruding from the lower side of the body 60 is inclined with respect to the body 60. The small diameter portion 52 is easier to confirm the inclination with respect to the body 60 than the base 20. This is because the small-diameter portion 52 has a longer dimension in the direction along the lamp axis J than the base 20. Moreover, although the base 20 is accommodated in the body 60 and hardly exposed, the small diameter part 52 is exposed substantially entirely.

  After correcting the inclination of the assembly 4 with respect to the body 60, the part corresponding to the caulking hole 23b of the base 20 in the body 60 is caulked. Caulking is performed, for example, by pressing a part of the body 60 against the caulking hole 23b using a caulking pin (not shown). Thus, a recess is formed by a pin in the body 60, and the base 20 is fixed to the body 60 by a fitting structure of the recess and the caulking hole 23b. After caulking, a caulking trace 63 remains in the caulking portion of the body 60.

  In this way, the base 20 is fixed to the body 60 by caulking. The number and shape of the caulking holes 23b are not limited to the above, and are arbitrary and may be any number and shape suitable for caulking. Further, the caulking hole 23b is not necessarily required in the base 20, and the body 60 can be fixed to the base 20 in which the caulking hole 23b is not provided by caulking. In this case, for example, it is conceivable to use a caulking pin to caulk a part of the body 60 into the outer peripheral surface 23 a of the flange 23 of the base 20.

In addition, the method of fixing the base 20 to the body 60 is not limited to caulking, and may be bonding using an adhesive. However, in the case of bonding, a complicated application process such as applying the adhesive accurately to only the necessary part is required, and a drying process for solidifying the adhesive is also required.
As described above, the lamp 1 has a configuration in which the base 20 is assembled to the circuit case 50 by press-fitting the convex portion 56 into the concave portion 25, so that the base 20 is fixed to the body 60 in an appropriate posture. easy. In the structure in which the base 20 is assembled to the circuit case 50, the base 20 and the circuit case 50 can be integrated before the base 20 is fixed to the body 60. Since the assembly 4 in which the base 20 and the circuit case 50 are integrated has a longer dimension in the direction along the lamp axis J than the base 20 alone, it is easy to determine the inclination.

  In particular, when the circuit case 50 and the body 60 are respectively cylindrical, it is easy to determine the inclination because it is easy to match both cylinder axes. This is because the inclination of the assembly 4 can be determined by checking whether the contour of the circuit case 50 and the contour of the body 60 are concentric when the lamp 1 being assembled is viewed from above or below. In particular, when the lamp 1 being assembled is viewed from below and it is confirmed whether the contour of the small-diameter portion 52 and the contour of the body 60 are concentric, the inclination of the assembly 4 can be well understood.

  If the inclination of the assembly 4 can be determined, the inclination of the base 20 that is a part of the assembly 4 can also be determined. Therefore, it can be said that the inclination of the base 20 is easy to determine after all. Then, before the base 20 is fixed to the body 60, the inclination of the base 20 can be noticed and the inclination of the base 20 can be corrected, and the base 20 is fixed to the body 60 in an appropriate posture. It can be said that it is easy.

  When the base 20 is inclined with respect to the body 60, the posture of the base 20 with respect to the body 60 can be corrected by moving the assembly 4 with the small diameter portion 52. Since the small-diameter portion 52 is easier to hold by hand than the base 20, workability when correcting the tilt is good. If the posture is corrected and the cylinder axes of both the body 60 and the circuit case 50 are matched, the mounting surface 22a of the main body portion 22 of the base 20 is in a state orthogonal to the cylinder axis of the body 60.

Even if a shelf portion on which the lower surface of the base can be placed is provided on the inner peripheral surface of the body, the inclination of the base can be prevented. If the base placed on the shelf is fixed to the body by screws or the like, the base will not move and tilt.
However, if the shelf is provided, the shape of the body becomes complicated and the weight of the body increases. Further, since the shape of the body is complicated, it is difficult to manufacture the body by drawing. In that case, since the body must be manufactured by die-casting or machining, the manufacturing cost increases. Further, if the base is screwed to the body, the manufacturing process becomes complicated. On the other hand, in the lamp 1 according to the present embodiment, since the body 60 does not have a complicated shape, the body 60 can be formed by an inexpensive drawing process. Moreover, since the thickness of the body 60 can be made uniform and thin, the lamp 1 can also be reduced in weight. Furthermore, since the posture of the base 20 can be determined by a much simpler work than the screwing of pressing the convex portion 56 into the concave portion 25, the manufacturing process is not complicated.

[Modification of First Embodiment]
Below, the modification of the base 20 and the circuit case 50 which concern on 1st Embodiment is demonstrated from a viewpoint of the number, shape, and arrangement | positioning of a convex part and a recessed part especially. In addition, the same code | symbol as 1st Embodiment relations is attached | subjected to the structure which is common in the base 20 and circuit case 50 which concern on 1st Embodiment, and description of the structure is simplified or abbreviate | omitted.

(Modification 1)
FIG. 7 is a perspective view of a base according to Modification 1 of the first embodiment. The base 120 according to the first modification shown in FIG. 7 is similar to the base 20 according to the first embodiment. The base 120 has a substantially disc-like body 122 having a cavity 121, and the lower side of the outer periphery of the body 122. It is comprised with the substantially annular collar part 23 provided in the part. The base 120 according to Modification 1 is different from the base 20 according to the first embodiment in that the cavity 121 itself functions as a recess. Specifically, in the first embodiment, the groove-shaped recess 25 is formed on the inner peripheral surface 21 a of the cavity 21, but in the first modification, no groove is formed on the inner peripheral surface 121 a of the cavity 121. First, the base 120 is assembled to the circuit case 50 by press-fitting three convex portions 56 of the circuit case 50 (see FIG. 3) into the substantially cylindrical cavity 121.

The inner diameter R4 of the cavity 121 is the same as the diameter R1 of the virtual circle C1 shown in FIG. 4, and when the three convex portions 56 of the circuit case 50 are fitted into the cavity 121, the top 56d of the triangular rib 56c The top 56d is crushed by hitting the inner peripheral surface 121a. As a result, the convex portion 56 is pressed into the cavity 121.
Thus, the relationship between the convex portion and the concave portion is not necessarily 1: 1, and a configuration in which a plurality of convex portions are press-fitted into one concave portion may be employed. In the case of the first modification, it is not necessary to worry about the alignment between the base 20 and the circuit case 50 in the rotation direction around the lamp axis J. Therefore, the base 20 can be assembled to the circuit case 50 more easily.

(Modification 2)
FIG. 8 is a perspective view of a base according to Modification 1 of the first embodiment. A base 220 according to Modification 2 shown in FIG. 8 is provided in a substantially disc-shaped main body 222 and a lower portion of the outer periphery of the main body 222 in the same manner as the base 20 according to the first embodiment. And a substantially annular flange 23. However, the base 220 according to the modified example 2 is not configured such that the recess 25 is formed in the cavity 21 of the main body portion 22 as in the base 20 according to the first embodiment, but the lower surface 220a of the base 220. In this configuration, three hole-shaped recesses 225 are formed. The cross-sectional shape orthogonal to the lamp axis J of the concave portion 225 is substantially square according to the shape of the upper end portion 56 a of the convex portion 56.

  The base 220 is assembled to the circuit case 50 by press-fitting the convex portion 56 of the circuit case 50 (see FIG. 3) into the concave portion 225 of the base 220. The diameter R5 of the virtual circle C5 that overlaps all three outer surfaces (surfaces opposite to the lamp axis J) 225a of the three recesses 225 in plan view is the same as the diameter R1 of the virtual circle C1 shown in FIG. is there. When the three convex portions 56 of the circuit case 50 are fitted into the corresponding concave portions 225, the triangular ribs 56c hit the outer surface 225a of the concave portions 225, and the top portions 56d of the triangular ribs 56c are crushed. Thereby, each convex part 56 will be in the state press-fitted in each concave part 225 by the one-to-one relationship.

Thus, each recessed part may be an independent hole shape. If the recess is hole-shaped, it is easy to grasp the position of the recess. In the case of the second modification, the concave portion 225 is disposed at a position that is asymmetric with respect to the cylindrical axis of the circuit case 50, so that the reference to the circuit case 50 in the rotation direction about the lamp axis J is provided. The position of the table 220 can be adjusted.
(Modification 3)
FIG. 9 is a perspective view for explaining a manner of assembling the base according to the third modification of the first embodiment to the circuit case. A base 320 according to the third modification shown in FIG. 9 is similar to the base 220 according to the second modification. The substantially disc-shaped main body 322 having no cavity and the lower part of the outer periphery of the main body 322 It is comprised with the substantially annular collar part 23 provided in this. Only one convex portion 356 is formed on the lower surface 320 a of the base 320, and only one concave portion 325 is provided on the circuit case 350.

  The tip of the upper end portion 356a of the convex portion 356 has a tapered shape and is easily fitted into the concave portion 325. Further, the upper end portion 356a of the convex portion 356 is not only provided with a triangular rib 356b on the side opposite to the lamp axis J, but also provided with a triangular rib 356c on the lamp axis J side. Further, triangular ribs 356d and 356e are provided on both sides of the upper end portion 356a of the convex portion 356 in the rotation direction around the lamp axis J, respectively.

The cross-sectional shape orthogonal to the lamp axis J of the concave portion 325 is substantially square according to the shape of the upper end portion 356a of the convex portion 356. The inner surface of the recess 325 includes a first surface 325a opposite to the lamp shaft J, a second surface 325b on the lamp shaft J side, and a third surface 325c and a fourth surface on both sides in the rotational direction around the lamp shaft J. It consists of four sides with 325d.
The width W1 between the first surface 325a against which the triangular rib 356b abuts and the second surface 325b against which the triangular rib 356c abuts is narrower than the width W2 between the tops of the triangular rib 356b and the triangular rib 356c. The width W3 between the third surface 325c against which the triangular rib 356d abuts and the fourth surface 325d against which the triangular rib 356e abuts is narrower than the width W4 between the tops of the triangular rib 356d and the triangular rib 356e. Therefore, when the convex portion 356 is fitted into the concave portion 325, the top portions of the triangular ribs 356b to 356e hit the surfaces 325a to 325d, and the top portions are crushed. As a result, the convex portion 356 is pressed into the concave portion 325. By providing the triangular ribs 356b to 356e on the four sides of the upper end portion 356a of the convex portion 356, the base 320 is less likely to wobble with respect to the circuit case 350 even though there is only one convex portion 356. ing.

  As described above, there are not necessarily a plurality of concave portions and convex portions, and a single concave portion and a convex portion may be used. In the case of the modification 3, since the number of convex portions provided in the circuit case is smaller than that in the modification 2, the inside of the circuit case can be secured widely. Moreover, since there is only one place to be fitted, the assembling work is simple. Further, in the present embodiment, the triangular ribs are provided at four locations on the four sides of the upper end portion of the convex portion, but the number of triangular ribs may be one.

<Second Embodiment>
FIG. 10 is a perspective view for explaining an aspect of assembling the base according to the second embodiment to the circuit case. FIG. 11 is a cross-sectional view showing a lamp according to the second embodiment. In addition, the same code | symbol as 1st Embodiment relations is attached | subjected to the structure which is common in the base 20 and circuit case 50 which concern on 1st Embodiment, and description of the structure is simplified or abbreviate | omitted.

  As shown in FIG. 10, a pair of convex portions 456 and 457 projecting upward is provided on the upper end portion 53 in the cylinder axis direction of the large diameter portion 51. The pair of convex portions 456 and 457 are arranged at positions facing each other across the lamp axis J, and each plan view shape is an arc shape along the curve of the inner peripheral surface 54 of the large diameter portion 51. The convex portion 456 and the convex portion 457 have the same height (width in the vertical direction), but the width in the direction along the inner peripheral surface 54 of the large diameter portion 51 is larger in the convex portion 456 than in the convex portion 457. Also long. Further, the thickness of the convex portion 456 and the convex portion 457 is the same as the thickness of the large diameter portion 51.

  On the other hand, on the lower surface 420a of the base 420, concave portions 425 and 426 having an arcuate cross-sectional shape corresponding to the plan view shape of the convex portions 456 and 457 are formed at two locations corresponding to the positions of the convex portions 456 and 457. Has been. Since the concave portion 425 has a shape corresponding to the convex portion 456 and the concave portion 426 has a shape corresponding to the convex portion 457, the width in the direction along the outer peripheral surface 23a of the flange portion 23 is larger in the concave portion 425 than in the concave portion 426. Also long. And even if it tries to fit the convex part 456 in the recessed part 426, since the said width | variety of the recessed part 426 is insufficient, it cannot insert. Therefore, the convex portion 456 and the convex portion 457 are not fitted into the concave portion 425 and the concave portion 426, and an error occurs when the base 420 and the circuit case 450 are aligned in the rotational direction around the lamp axis J. Not likely to occur.

  The concave portions 425 and 426 are convex portions having a width between outer surfaces (surfaces opposite to the lamp shaft J side) 425a and 426a and inner side surfaces (surfaces on the lamp shaft J side) 425b and 426b on the inner peripheral surface. It is thicker than 456,457. On the other hand, the convex portions 456 and 457 are provided with two triangular ribs 456a and 457a on the outer side, respectively, and one triangular rib 456b and 457b on the inner side. As shown in FIG. 11, when the convex portions 456 and 457 are fitted into the concave portions 425 and 426, the triangular ribs 456a and 457a hit the outer surfaces 425a and 426a of the concave portions 425 and 426, and the inner side surfaces 425b of the concave portions 425 and 426 are obtained. , 426b hits the triangular ribs 456b, 457b, and the convex portions 456, 457 are pressed into the concave portions 425, 426.

Since the convex portions 456 and 457 protrude from the upper end portion 53 in the cylinder axis direction of the large diameter portion 51, compared with the configuration in which the convex portion protrudes from the inner peripheral surface 54 of the large diameter portion 51, A wide space can be secured.
<Third Embodiment>
FIG. 12 is a perspective view for explaining an aspect of assembling the base according to the third embodiment to a circuit case. In FIG. 12, the same reference numerals as those in the first embodiment are attached to the configurations common to the base 20 and the circuit case 50 according to the first embodiment, and the description of the configurations is simplified or omitted.

  As shown in FIG. 12, a pair of rail portions 555 having rail grooves 555a for inserting a circuit board are provided on the inner peripheral surface 54 of the circuit case 550 so as to be parallel to each other along the lamp axis J direction. It has been. The rail width of the rail groove 555a is a width corresponding to the thickness of the circuit board, and the outer edge portion of the circuit board 41 (not shown in FIG. 12) of the circuit unit 40 is inserted into the rail groove 555a. Thus, the circuit unit 40 is held by the circuit case 550 with the principal surface of the circuit board 41 in a posture along the lamp axis J direction.

  The upper end portion 555 b of the pair of rail portions 555 protrudes upward from the upper end portion 53 in the cylinder axis direction of the large diameter portion 51, and the upper end portion 555 b of the rail portion 555 is a convex that is press-fitted into the concave portion 525 of the base 520. It functions as a part. On the outer surface (surface opposite to the lamp shaft J side) 555c of the upper end portion 555b of the rail portion 555, a single triangular rib 555d is formed in a direction along the lamp shaft J. On the other hand, the base 520 includes a substantially disc-shaped main body 522 and a substantially annular flange 23 provided in a lower portion of the outer periphery of the main body 522. On the lower surface 520 a of the base 520, recesses 525 having a cross-sectional shape corresponding to the plan view shape of the upper end portion 555 b of the rail portion 555 are formed at two locations corresponding to the position of the rail portion 555. When the upper end portion 555b of the rail portion 555 is fitted into the concave portion 525, the triangular rib 555d hits the outer surface (surface opposite to the lamp shaft J side) 525a on the inner peripheral surface of the concave portion 525, and the upper end portion 555b is a concave portion. It is in a state of being press-fitted into 525.

  As described above, the base 520 can be assembled to the circuit case 550 even when the upper end portion 555 b of the rail portion 555 is press-fitted into the recess 525. In this case, since the shape of the circuit case 550 can be simplified as compared with the case where a protrusion is provided separately from the rail portion 555, the manufacturing cost of the circuit case 550 can be reduced. Moreover, since the inside of the circuit case 550 is not narrowed by the convex portion, the inside of the circuit case 550 can be secured more widely.

<Fourth Embodiment>
So far, the configuration has been described in which the base is provided with the convex portion and the circuit case is provided with the concave portion, but the base is provided with the concave portion and the circuit case is provided with the convex portion. It may be a configuration. FIG. 13: is a perspective view for demonstrating the aspect of the assembly | attachment to the circuit case of the base which concerns on 4th Embodiment. In FIG. 13, the same components as those of the lamp 1 according to the first embodiment are denoted by the same reference numerals, and the subsequent description is omitted.

  As shown in FIG. 13, the base 620 includes a substantially disc-shaped main body 622 and a substantially annular flange 23 provided in a lower portion of the outer periphery of the main body 622. On the lower surface 620 a of the base 620, a pair of convex portions 625 are provided on a virtual line orthogonal to the lamp axis J. These convex portions 625 are provided so as to extend in the vertical direction from the lower surface 620a, and are both substantially rectangular plate-shaped, and have the same height (width in the vertical direction), width, and thickness. Further, the lower end portion 625a of the convex portion 625 is made thinner toward the lower side so as to be easily fitted into the concave portion 656a.

  On the other hand, on the inner peripheral surface 54 of the circuit case 650, a pair of bulging portions 656 having groove-like concave portions 656a for inserting the convex portions 625 are provided so as to be parallel to each other along the lamp axis J direction. ing. The width of the concave portion 656a of the bulging portion 656 is slightly larger than the thickness of the convex portion 625, and the convex portion 625 can be fitted into the concave portion 656a. A pair of triangular ribs 656d and 656e are provided along the lamp axis J on the pair of wall surfaces 656b and 656c of the recess 656a. When the convex portion 625 is fitted into the concave portion 656a, the triangular ribs 656d and 656e hit the pair of main surfaces 625b and 625c of the convex portion 625, the top portions of the triangular ribs 656d and 656e are crushed, and the convex portion 625 is press-fitted into the concave portion 656a. It will be in the state.

  In the configuration in which the convex portion is press-fitted into the concave portion, when one is made of metal and the other is made of resin, the resin component is more easily broken. Therefore, it is preferable to provide the rib on the assumption that the top portion is crushed on the resin component side. If a rib is provided on the metal part side, the resin part may be damaged by the rib. Moreover, it is better that the convex side is made of resin than the concave side is made of resin. This is because if the metal protrusion is forcibly fitted into the resin recess, the resin component may be damaged. Therefore, it is preferable to provide a convex portion on the circuit case 50 side.

<Fifth Embodiment>
FIG. 14 is a cross-sectional view showing a lamp according to the fifth embodiment. As shown in FIG. 14, the lamp 700 according to the fifth embodiment is a so-called clear light bulb type LED lamp, and can obtain a light distribution characteristic approximate to an incandescent light bulb.
The lamp 700 includes a light emitting module 710, a base 720, a circuit unit 740, a circuit case 750, a base 780, and a globe 790.

The light emitting module 710 includes a mounting substrate 711 and a light emitting unit 712 provided on the mounting substrate 711. Power supply terminals (not shown) are provided at both ends of the mounting substrate 711. The power supply terminals are electrically connected to the pair of lead wires 744 and 745 of the circuit unit 740 by the conductive bonding members 714 and 715.
The base 720 includes a main body portion 721 and a stem portion 722.

The main body portion 721 has a substantially disk shape, and a stem portion 722 that supports the light emitting module 710 is erected on the upper surface 723. The main body 721 has a pair of through holes 724 through which the pair of lead wires 744 and 745 of the circuit unit 740 are inserted.
Further, a concave portion 726 into which the convex portion 756 of the circuit case 750 is press-fitted is formed on the lower surface 725 of the main body portion 721. The concave portion 726 is configured such that a part of the lower surface 725 of the main body portion 721 is recessed on the upper surface 723 side of the main body portion 721, similarly to the concave portion 426 in the second embodiment. The base 720 is assembled to the circuit case 750 by press-fitting the convex portion 756 provided with the triangular ribs 756a and 756b in the concave portion 726. The configuration of the convex portion 457 and the concave portion 426 of the second embodiment can be applied to the convex portion 756 and the concave portion 726.

  The stem portion 722 is a metal bar-like member, and supports the light emitting module 710 at the center position of the globe 790. The base end portion 722a of the stem portion 722 is supported by the main body portion 721, and the light emitting module 710 is mounted on the mounting surface 722c that is the upper surface of the distal end portion 722b. Since the stem 722 is provided, the base 720 has a long dimension in the lamp axis J direction. When the dimension of the base 720 in the lamp axis J direction is long, the inclination of the mounting surface 722c with respect to the body 760 is relatively easy to understand. However, even in such a case, if the base 720 is assembled to the circuit case 750, the dimension in the lamp axis J direction of the assembly including the base 720 and the circuit case 750 is longer than that of the base 720 alone. The base 720 can be easily fixed to the body 760 in an appropriate posture by the length that is increased.

  The circuit unit 740 is for receiving power through the base 780 and causing the light emitting unit 712 to emit light. The circuit unit 740 includes a circuit board 741 and a plurality of electronic components 742 and 743 mounted on the circuit board 741. In the drawings, only some electronic parts are denoted by reference numerals “742” and “743”. In the circuit unit 740, the main surface of the circuit board 741 is held in a posture along the lamp axis J direction by the circuit case 750.

  As shown in FIG. 18, the circuit unit 740 and the light emitting module 710 are electrically connected by a pair of lead wires 744 and 745. The pair of lead wires 744 and 745 are led out above the main body 721 via the through holes 724 of the main body 721 and are connected to the light emitting module 710. On the other hand, the circuit unit 740 and the base 780 are electrically connected by a pair of lead wires 746 and 747. The lead wire 746 is connected to the shell portion 781 of the base 780 through the through hole 753 of the circuit case 750 and the through hole 763 of the base attachment portion 762 in the body 760. The lead wire 747 is connected to the eyelet portion 782 of the base 780 through the lower opening 755 of the small diameter portion 752 in the circuit case 750.

  The circuit case 750 has a cylindrical portion, and holds the circuit unit 740 in a posture in which the main surface of the circuit board 741 is along the cylindrical axis direction of the cylindrical portion in the cylindrical portion. The circuit case 750 is cylindrical, and the cylinder axis of the circuit case 750 coincides with the lamp axis J. A groove portion (not shown) is formed on the inner peripheral surface of the circuit case 750, and the circuit board 741 is inserted into the groove portion, thereby holding the circuit unit 740 in the above posture. Furthermore, when the circuit board 741 is inserted into the groove, the rotational movement of the circuit board 741 around the lamp axis J is restricted.

The circuit case 750 includes a large diameter part 751 and a small diameter part 752. The large-diameter portion 751 is formed with a convex portion 756 that protrudes from the opening surface of the upper opening 754. The convex portion 756 is fitted into the concave portion 726 of the main body portion 721 so that the main body portion 721 is aligned. On the other hand, a base 780 is fitted on the small diameter portion 752.
The body 760 is a cylindrical member and includes an outer shell portion 761 and a base attaching portion 762. The outer shell portion 761 has a cylindrical shape with a diameter reduced from the upper side to the lower side, and is externally fitted to the large diameter portion 751 of the circuit case 750. The base attaching part 762 protrudes downward from the lower end of the outer shell part 761, and the base 780 is fitted on the base attaching part 762. Further, the inner surface of the outer shell portion 761 of the body 760 is in contact with the outer peripheral surface 727 of the main body portion 721. Accordingly, heat generated in the light emitting module 710 and propagated to the main body 721 via the stem 722 can be efficiently transferred to the body 760.

The base 780 is, for example, an Edison type E26 base including a shell portion 781 having a substantially cylindrical shape and an outer peripheral surface being a male screw, and an eyelet portion 782 attached to the shell portion 781 via an insulating portion 783. It is.
The globe 790 has the same A shape as a general incandescent bulb, and is made of a translucent material such as silica glass or resin. The peripheral part 728 of the main body part 721 is a recess, and the opening part end 791 of the globe 790 is inserted in the state where the peripheral part 728 is filled with the adhesive 701, whereby the main body part 721, the body 760, and the globe 790 are inserted. Three are fixed.

With such a configuration, the effect described in the first embodiment can be obtained even in a clear light bulb. Further, FIG. 14 shows an example in which the configuration of the second embodiment is applied to a clear light bulb, but it is of course possible to apply the configurations of the first, third, and fourth embodiments and their modifications. It is.
<Other variations>
As another modification, regarding the light emitting module, the mounting substrate 11 is not limited to the metal base substrate, and may be an existing mounting substrate other than the metal base substrate, such as a resin substrate or a ceramic substrate. Moreover, the light emission part 12 is not limited to what utilized LED, For example, what utilized semiconductor light emitting elements other than LED, such as LD (laser diode) and EL element (electric luminescence element), may be used. Moreover, the light emission part 12 is not limited to what emits white light, You may emit the light of another color. Furthermore, the LED may have any structure such as a bullet type, a surface mounted device (SMD) type, a COB (Chip On Board) type, and a power LED type.

In addition, the lamp is not limited to a light bulb shaped lamp (A type or PS type) approximated to the shape of a general incandescent light bulb, but instead of a ball lamp (G type), a cylindrical lamp (T type), or a ref type light bulb. It may be a lamp or the like as a product.
As mentioned above, although the structure of this invention was demonstrated based on the said embodiment and modification, this invention is not restricted to the said embodiment and its modification. For example, the structure which combined suitably the said embodiment and the partial structure of the modification may be sufficient. In addition, the materials, numerical values, and the like described in the above embodiments are merely preferable examples and are not limited thereto. Furthermore, it is possible to appropriately change the configuration without departing from the scope of the technical idea of the present invention. The present invention can be widely used in general lighting applications.

  The present invention is applicable to LED lamps in general.

10,710 Light emitting module 20, 120, 220, 320, 420, 520, 620, 720 Base 22a, 722c Mounting surface 25, 121, 225, 325, 425, 426, 525, 656a, 724 Recess 40, 740 Circuit unit 50, 750 Circuit case 53 Upper end in the cylinder axis direction (one end in the cylinder axis direction)
56, 356, 456, 457, 555, 625, 756 Convex part 60, 760 Body 61 Cylinder axis direction upper end part (Cylinder axis direction one end part)

Claims (6)

A light emitting module as a light source;
A base on which the light emitting module is mounted;
A circuit unit for lighting the light emitting module;
A circuit case having a cylindrical shape, in which the circuit unit is housed and whose one end in a cylinder axis direction is directed to the base;
A tubular body that is externally fitted to the circuit case, and the base is fixed to one end in the cylindrical axis direction,
At least one convex portion is provided on one side and at least one concave portion on the other side at a portion facing the one end portion in the cylindrical axis direction of the circuit case and one end portion in the cylindrical axis direction of the circuit case on the base. And the base is assembled to the circuit case by press-fitting the convex portion into the concave portion ,
There is a gap in the cylinder axis direction between the one end part in the cylinder axis direction of the circuit case and the part facing the one end part in the cylinder axis direction of the circuit case in the base,
The circuit case is configured to be movable relative to the body in the cylinder axis direction . The lamp according to claim 1, wherein the base is plate-shaped and is fixed to the body so as to close an opening at one end of the body in the cylinder axis direction. The lamp according to claim 1 or 2, wherein the circuit case and the body are each cylindrical, and both cylinder axes substantially coincide with each other. Two or more sets of the convex part and the concave part are provided, and at least two sets of the convex part and the concave part are arranged at positions that are asymmetric with respect to the cylinder axis of the circuit case. The lamp according to claim 3. The lamp according to any one of claims 1 to 4, wherein the base and the body are made of metal, and the base is fixed to the body by caulking. 6. The circuit case according to claim 1, wherein the circuit case is made of resin, the base is made of metal, the convex portion is provided in the circuit case, and the concave portion is provided in the base. Lamp according to any one.

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