JP5347086B1 - Lamps and lighting equipment - Google Patents

Abstract

  The lamp 1 is formed in a cylindrical shape and is reduced in diameter from the upper end portion toward the lower end portion in the central axis (lamp axis J) direction, and the upper end portion of the casing 60 is formed in a disk shape. And a light emitting module 40 provided on the upper surface (first main surface) of the base 70. And the housing | casing 60 is protrudingly provided from the inner wall of the cylindrical main body part 61, and the main body part 61, and the seat part 62 by which the periphery in the lower surface (2nd main surface) of the base 70 is seated. Have

Description

  The present invention relates to a lamp using a light emitting module and a lighting device using the same, and more particularly to a technique for reducing variation in light distribution characteristics.

  In recent years, a light bulb shaped lamp using a light emitting module having a semiconductor light emitting element such as an LED (Light Emitting Diode) has become widespread as an alternative to an incandescent light bulb (see, for example, Patent Document 1).

  Some light bulb shaped lamps have a plate-like base on which a light emitting module is provided fixed to one end portion in the central axis direction of a cylindrical casing.

  A cross-sectional view of an example of this type of lamp is shown in FIG. In FIG. 18, the alternate long and short dash line drawn in the vertical direction of the drawing indicates the central axis J0 of the housing 1060.

  As shown in FIG. 18, the lamp 1001 includes a base 1010, a power supply circuit 1020, a circuit holder 1030, a light emitting module 1040, a globe 1050, a housing 1060, and a base 1070.

  The power supply circuit 1020 converts an AC voltage supplied from an external commercial power supply via the base 1010 into a DC voltage and outputs the DC voltage. The power supply circuit 1020 is disposed inside the circuit holder 1030. The base 1010 is fitted on the opening 1032 side of the circuit holder 1030.

  The casing 1060 has a cylindrical shape and is reduced in diameter from one end side to the other end side on the globe 1050 side in the central axis direction, and is a portion of the portion that is not covered with the base 1010 on the side wall of the circuit holder 1030. It is attached to cover many. The globe 1050 is attached to one end of the housing 1060.

  The base 1070 has a disk shape and is disposed inside the other end of the housing 1060. A light emitting module 1040 is provided on the opposite side of the base 1070 from the circuit holder 1030 side. The light emitting module 1040 receives power supply from the power supply circuit 1020.

  Here, a method of attaching the base 1070 to one end portion of the housing 1060 will be described with reference to the cross-sectional views of FIGS.

  19A to 19C are cross-sectional views for explaining a process of attaching the base 1070 to the housing 1060 for the lamp 1001.

  First, the base 1070 is caused to enter the housing 1060 from one end side of the housing 1060 (see the arrow in FIG. 19A). Then, since the housing 1060 is reduced in diameter from the one end side toward the other end side, the base 1070 has a peripheral surface of the base 1070 at the inner wall of the housing 1060 at one end of the housing 1060. Stops at the abutting position. At this time, the base 1070 is maintained in a posture determined by the portion of the inner wall of the housing 1060 that the peripheral surface of the lower end of the base 1070 contacts.

  Next, in a state where the peripheral surface of the base 1070 is in contact with the inner peripheral surface of the housing 1060 in the above posture, the peripheral wall of one end portion of the housing 1060 is caulked inward (arrow in FIG. 19B). (See FIG. 6), a convex portion 1062 is formed at one end of the housing 1060. Here, the base 1070 in the above-described posture is fixed to one end portion of the housing 1060 in a state where the tip end portion of the convex portion 1062 is in pressure contact with the peripheral surface of the base 1070.

JP 2009-37995 A

  By the way, the portion of the inner wall of the housing 1060 where the peripheral surface of the lower end of the base 1070 comes into contact depends on the inclination of the base 1070 with respect to the central axis of the housing 1060 when the base 1070 enters the housing 1060. The When a plurality of lamps 1001 are manufactured, a variation between the plurality of lamps 1001 (hereinafter referred to as “the inclination of the base 1070 with respect to the central axis of the housing 1060 when the base 1070 enters the housing 1060”). When the manufacturing variation is increased, the variation of the portion of the inner wall of the housing 1060 where the peripheral surface of the lower end of the base 1070 comes into contact also increases (see FIG. 19C). In particular, when the work of fitting the base 1070 into the housing 1060 is performed manually, variation in inclination of the base 1070 with respect to the central axis of the housing 1060 is large. Thus, when the manufacturing variation of the portion where the peripheral surface of the lower end portion of the base 1070 abuts on the inner wall of the housing 1060 increases, the manufacture of the posture of the base 1070 determined by the portion where the peripheral surface of the lower end portion of the base 1070 contacts. The variation also increases.

  And if the manufacturing variation of the attitude | position of the base 1070 after fixing the base 1070 to the housing | casing 1060 increases, the manufacturing variation of the main light emission direction of the light emitting module 1040 provided in the base 1070 will also increase in connection with it. . As a result, the manufacturing variation of the light distribution characteristics of the lamp increases.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a lamp capable of reducing variations in light distribution characteristics due to manufacturing errors.

  A lamp according to one embodiment of the present invention includes a casing formed in a cylindrical shape and having a diameter reduced from one end portion toward the other end portion in the central axis direction, and formed in a plate shape and at one end portion of the casing. A base disposed inside, and a light emitting module provided on the first main surface of the base, wherein the casing is protruded from the cylindrical main body and the inner wall of the main body, and is at least partially Has a seating portion on which the periphery of the second main surface opposite to the first main surface of the base is seated.

  According to the configuration according to the above aspect, the base is placed in the casing from the one end to the other end along the central axis of the casing with the second main surface of the base facing the other end of the casing. As it enters, the peripheral edge of the second main surface of the base is seated on at least a part of the seating portion. Then, the base is maintained in a posture determined by the positional relationship between the seating portions in the housing. As a result, when manufacturing a plurality of lamps, even if there is a variation in the inclination of the base when the base is moved into the housing, the posture of the base in the housing can be changed between the plurality of lamps regardless of the variation. Can be made substantially the same.

  And since the dispersion | variation in the attitude | position of the base in a housing | casing between several lamps can be reduced, the dispersion | variation in the main output direction of the light emitting module provided on the 1st main surface of the base can be reduced. As a result, variations in the light distribution characteristics of the lamp can be reduced.

FIG. 3 is a partially broken perspective view showing the lamp according to the first embodiment. Sectional drawing which shows the lamp | ramp which concerns on Embodiment 1. FIG. FIG. 3 is an exploded perspective view showing the housing and the base according to the first embodiment. (A) is a schematic sectional drawing of the housing | casing which concerns on Embodiment 1, (b) is a schematic sectional drawing of the site | part similar to the enlarged view of (a) about the housing | casing which concerns on a comparative example. Sectional drawing for demonstrating the process which attaches a base to a housing | casing about the lamp | ramp which concerns on Embodiment 1. FIG. Regarding the lamp according to Embodiment 1, (a) is a partially broken plan view with the light emitting module, globe, light scattering member, and reflecting member removed, and (b) is a basic view when the light emitting module is turned on. The figure which shows the relationship between the temperature of a base, and the magnitude | size of the clearance gap between the internal peripheral surface of a 2nd cylindrical member, and the peripheral surface of the base. FIG. 6 is a side view showing a lighting device according to Embodiment 2. The housing | casing which concerns on a modification is shown, (a) is a top view, (b) is sectional drawing fractured | ruptured by the AA in (a). The top view which shows the housing | casing which concerns on a modification. The disassembled perspective view which shows the housing | casing and base which concern on a modification. The disassembled perspective view which shows the housing | casing and base which concern on a modification. The housing | casing and base which concern on a modification are shown, (a) is a fragmentary sectional view, (b) is the partially broken top view. Sectional drawing which shows the lamp | ramp which concerns on a modification. The perspective view which shows the lamp | ramp which concerns on a modification. Sectional drawing of the lamp | ramp which concerns on a modification. The schematic diagram for demonstrating the assembly method of the structure which consists of the housing | casing which concerns on a modification, and a nozzle | cap | die. Sectional drawing of the lamp | ramp which concerns on a modification. Sectional drawing of the lamp | ramp which concerns on a prior art example. Sectional drawing for demonstrating the process which attaches a base to a housing | casing about the lamp | ramp which concerns on a prior art example.

<Embodiment 1>
<1> Configuration Hereinafter, the configuration of the lamp 1 according to the present embodiment will be described with reference to FIGS. 1 and 2.

  As shown in FIGS. 1 and 2, the lamp 1 according to the present embodiment is an LED lamp that is an alternative to an incandescent bulb, and includes a base 10, a power supply circuit 20, a light emitting module 40, a globe 50, and the like. , A light scattering member 52, a reflecting member 54, a housing 60, and a base 70.

  In FIG. 2, the alternate long and short dash line drawn in the vertical direction of the drawing indicates the lamp axis J of the lamp 1. The lamp axis J is an axis that becomes a rotation center when the lamp 1 is attached to a socket of a lighting device (not shown), and coincides with the central axis of the base 10. Further, in the following specification, in FIG. 2, description will be made assuming that the upper side of the paper is above the lamp 1 and the lower side of the paper is below the lamp 1.

<Base>
The base 10 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 turned on. The type of the base 10 is not particularly limited, and examples thereof include Edison type E26 base and E17 base. The base 10 includes a shell portion 12 having a substantially cylindrical shape and an outer peripheral surface being a male screw, and an eyelet portion 16 attached to the shell portion 12 via an insulating portion 14.

<Power supply circuit>
The power supply circuit 20 is a circuit that supplies power to the light emitting module 40, and includes a circuit board 20a and various electronic components 20b mounted on the circuit board 20a. In FIG. 2, only some electronic components are denoted by reference numerals. The power supply circuit 20 and the base 10 are electrically connected by power supply lines 22a and 22b. The power line 22 a is connected to the shell portion 12 of the base 10. Further, the power line 22 b is connected to the eyelet portion 16 of the base 10. The power supply circuit 20 includes a rectifying / smoothing circuit that rectifies and smoothes the alternating current supplied from the base 10 via the power supply lines 22a and 22b, and a voltage conversion circuit that steps up and down the input voltage from the rectifying and smoothing circuit and outputs the voltage. The power supply circuit 20 may include another circuit such as a dimming circuit. The electronic component 20b includes a smoothing electrolytic capacitor 20b1 that forms part of the rectifying and smoothing circuit. A leading end portion (hereinafter referred to as “lead leading end portion”) 26 of the lead of the electronic component 20b protrudes from the surface of the circuit board 20a opposite to the side on which the electronic component 20b is mounted.

<Light emitting module>
The light emitting module 40 includes a mounting substrate 42 and a plurality of light emitting units 44 disposed on the mounting substrate 42.

  The light emitting unit 44 includes a semiconductor light emitting element (not shown) and a plurality of sealing bodies 44a provided on the mounting substrate 42 so as to cover the semiconductor light emitting element. In the present embodiment, the semiconductor light emitting element is an LED (Light Emitting Diode), but the semiconductor light emitting element may be, for example, an EL element (electric luminescence element). The semiconductor light emitting element may be a COB (Chip on Board) type on the mounting substrate 42 or an SMD (Surface Mount Device) type.

  The mounting substrate 42 has a substantially annular shape, and a power receiving terminal 42 b for receiving power supplied from the power supply circuit 20 is provided on the surface side on which the light emitting unit 44 is mounted. In addition, a through hole 42 a that penetrates in the thickness direction of the mounting substrate 42 and through which the twisted pair wiring 24 led out from the power supply circuit 20 is inserted is provided at a substantially central portion of the mounting substrate 42. The mounting board 42 is also provided with through holes 42 c at locations corresponding to the three screws 56 for fixing the light scattering member 52 and the reflecting member 54 to the mounting board 42. The power receiving terminal 42b is connected to a connector (not shown) provided at the tip of the twisted pair wiring 24 drawn from the through hole 42a. A screw 56 is inserted through each of the through holes 42c.

  The sealing body 44a is mainly made of a translucent material. When it is necessary to convert the wavelength of the light emitted from the semiconductor light emitting element into a predetermined wavelength, a wavelength conversion material that converts the wavelength of the light is mixed into the translucent material. As the translucent material, for example, a silicone resin can be used, and as the wavelength conversion material, for example, phosphor particles can be used. In the present embodiment, a blue LED that emits blue light and a sealing body 44a formed of a translucent material mixed with phosphor particles that convert the wavelength of blue light into yellow light are employed. Then, a part of the blue light emitted from the blue LED is wavelength-converted into yellow light by the sealing body 44 a, and white light obtained by mixing blue light and yellow light is emitted from the light emitting unit 44.

  In this embodiment, the semiconductor light emitting device emitting blue light and the sealing body 44a that converts blue light into yellow light are used. However, semiconductor light emitting devices of other light emitting colors and wavelengths to other wavelengths are used. You may use the sealing body which performs conversion. In addition, it is not always necessary to mix the wavelength conversion material in the translucent material. For example, when using a semiconductor light emitting device that emits white light, or three types of semiconductor light emitting devices that emit blue light, red light, and green light. In the case where white light is obtained by mixing these luminescent colors with the use of, it is not necessary to mix the wavelength conversion material into the translucent material.

<Glove>
The globe 50 is made of glass, a resin material, or the like, and the inner surface 50a is subjected to a diffusion process for diffusing light emitted from the light emitting module 40, for example, a diffusion process using silica, white pigment, or the like. . The globe 50 is attached to the housing 60 so as to cover the upper side of the light emitting module 40 and close the upper opening of the housing 60 by press-fitting the opening-side end portion into the upper end portion of the housing 60. Yes. Then, the light incident on the inner surface 50a of the globe 50 from the light emitting module 40 is transmitted through the peripheral wall of the globe 50 and extracted outside. The shape of the globe 50 may be any shape such as a shape imitating a bulb of an A-type bulb. The globe 50 may be fixed to the housing 60 with an adhesive or the like.

<Light scattering member>
The light scattering member 52 includes a substantially cylindrical first part 52a and a substantially cylindrical second part 52b provided above the first part 52a. Both the first part 52a and the second part 52b have an outer diameter that gradually increases from the lower side toward the upper side, and the outer peripheral surfaces of the enlarged parts become the reflecting surfaces 52a1 and 52b1 of the light scattering member 52. ing. On the other hand, the inner diameter of the light scattering member 52 is formed uniformly over the entire vertical direction. The light scattering member 52 is fixed to the base 70 by three screws 56 in a state where the central axis thereof is orthogonal to the upper surface 42 d of the mounting substrate 42 of the light emitting module 40. On the mounting substrate 42, the light emitting portion 44 is annularly arranged around the light scattering member 52.

  The light scattering member 52 is made of a light transmissive material in which light transmissive light scattering particles having an average particle diameter of 1 μm or less are dispersed and mixed. Specifically, a particle portion formed of a light-transmitting material such as titania, silica, alumina, or zinc oxide is dispersed on a base portion formed of a resin material such as polycarbonate or a light-transmitting material such as glass or ceramic. It has been made. The translucent materials constituting the base portion and the particle portion are preferably colorless and transparent, respectively, but are not limited thereto, and may be colored and transparent as long as they have translucency. In order to efficiently scatter light inside the light scattering member 52, the light transmissive material constituting the particle portion should have a higher refractive index than the light transmissive material constituting the base portion.

<Reflection member>
The reflection member 54 is formed in a cylindrical shape, and is disposed inside the light scattering member 52. The reflecting member 54 is fixed to the base 70 by three screws 56 in a state where the reflecting member 54 is disposed above the mounting substrate 42 that constitutes a part of the light emitting module 40. The reflection member 54 is made of a metal material. Examples of the metal material include a pure metal composed of a single metal element such as Al, Ag, Au, Ni, Rh, and Pd, and an alloy composed of a plurality of metal elements or a metal element and a nonmetal element. It is done. The material constituting the reflecting member 54 is not limited to a metal material, and may be another material having a high light reflectance in the visible light region such as a white polycarbonate resin.

<Case>
The housing 60 includes a substantially cylindrical main body portion 61 and a seating portion 62. The main body 61 includes a first cylindrical member 64 and a second cylindrical member 66.

  The first cylindrical member 64 is reduced in diameter from the upper end (one end) toward the lower end (the other end). The power supply circuit 20 is disposed inside the first cylindrical member 64. The first cylindrical member 64 is made of a metal material. Examples of the metal material include a pure metal composed of a single metal element such as Al, Ag, Au, Ni, Rh, and Pd, and an alloy composed of a plurality of metal elements or a metal element and a nonmetal element. It is done. The material constituting the first cylindrical member 64 is not limited to a metal material, and may be a material having good thermal conductivity mixed with a metal or alloy filler, for example.

  The second cylindrical member 66 includes a covering portion 66a and a base attaching portion 66b. The covering portion 66 a covers the outer peripheral surface of the first cylindrical member 64. The base attaching portion 66 b is continuous at the lower end portion of the covering portion 66 a and extends below the lower end portion of the first cylindrical member 64. Here, the first cylindrical member 64 is in close contact with the inner peripheral surface of the covering portion 66 a of the second cylindrical member 66. The inner diameter of the covering portion 66 a is larger than the inner diameter of the first cylindrical member 64 by an amount corresponding to the thickness of the peripheral wall of the first cylindrical member 64. A male screw portion is formed on the outer wall of the base attaching portion 66b. The base 10 is externally fitted to the male screw portion, so that the lower opening 66c of the base attachment portion 66b is closed by the base 10. Inside the second cylindrical member 66, a capacitor 20b1 that constitutes a part of the power supply circuit 20 is disposed. The shape of the inner wall of the second cylindrical member 66 is a shape along the outer peripheral surface of the capacitor 20b1, and the distance between the inner wall of the second cylindrical member 66 and the outer peripheral surface of the capacitor 20b1 is accordingly increased. It is getting smaller. Thereby, the heat generated in the capacitor 20b1 is easily transferred to the peripheral wall of the second cylindrical member 66, and the peripheral wall of the second cylindrical member 66, the base 10 and the base of the heat generated in the capacitor 20b1 are correspondingly increased. Heat dissipation to the lighting device is promoted through a socket (not shown) of the lighting device that fits into the lighting device 10. As a result, thermal destruction of the capacitor 20b1 is suppressed.

  The second cylindrical member 66 is formed of an insulating material made of a resin material, an inorganic material, or a mixture thereof.

  Examples of the resin material include a thermoplastic resin and a thermosetting resin. Specifically, polybutylene terephthalate, polyoxymethyl, polyamide, polyphenyl sulfide, polycarbonate, acrylic, fluorine-based acrylic, silicone-based acrylic, epoxy acrylate, polystyrene, acrylonitrile styrene, cycloolefin polymer, methyl styrene, fluorene, polyethylene Examples include terephthalate, polypropylene, phenol resin, and melamine resin.

  Examples of the inorganic material include glass, ceramic, silica, titania, alumina, silica alumina, zirconia, zinc oxide, barium oxide, strontium oxide, zirconium oxide, boron nitride, and aluminum nitride.

  By the way, in the lamp 1, in the unlikely event that the circuit board 20a and the first cylindrical member 64 are electrically connected, the creeping discharge is generated between the outer peripheral surface of the second cylindrical member 66 and the first cylindrical member 64. It is important from the viewpoint of safety to prevent the occurrence of In this regard, creeping discharge (dielectric breakdown) occurs even when a voltage of 3 to 4 kV or higher is applied to the lamp 1 between the outer peripheral surface of the second cylindrical member 66 and the first cylindrical member 64. Performance that is not available is being sought internationally.

  On the other hand, in the housing 60 according to the present embodiment, the upper end edge of the first cylindrical member 64 is lower than the upper end edge of the second cylindrical member 66 along the cylinder axis of the first cylindrical member 64. It is retracted by a length L1 in the direction. Here, considering the dielectric strength performance, the length L1 is preferably set to 4 mm or more.

  The seating portion 62 is formed in a substantially cylindrical shape and covers a region from the lower end edge to the vicinity of the upper end edge on the inner peripheral surface of the first cylindrical member 64. The seat 62 is in close contact with the inner peripheral surface of the first cylindrical member 64. The first seat 62 is made of an insulating material made of a resin material.

  A perspective view of the housing 60 and the base 70 is shown in FIG.

  As shown in FIG. 3, the seating portion 62 includes a seating portion main body 621, a projecting portion 62 c, and a circuit board clamping piece 63.

  The seat portion main body 621 is formed in a substantially cylindrical shape, and a plurality of substantially rectangular window portions 62b are formed on the peripheral wall thereof. A part of the first cylindrical member 64 is exposed from each window 62b. The seat body 621 protrudes from the inner wall of the body 61 in a direction approaching the power supply circuit 20. As a result, the heat generated in the power supply circuit 20 is easily transferred to the first cylindrical member 64 made of a metal material having good thermal conductivity, and accordingly, the heat generated in the power supply circuit 20 is transferred to the outside of the lamp 1. The characteristics can be improved. Here, the upper end surface of the seating portion main body 621 is substantially orthogonal to the lamp axis J.

  The protruding part 62 c protrudes from the peripheral wall of the seating part main body 621 toward the central axis of the seating part main body 621. Three protrusions 62c are provided at equal intervals around the central axis. In addition, the protruding amount of each protruding portion 62c increases from the lower side to the upper side in the lamp axis J direction. A screw hole 62a into which a screw 72 for fixing the base 70 to the housing 60 is screwed is formed in each upper end surface of the protruding portion 62c. Here, the upper end surface of the protrusion 62c is substantially orthogonal to the lamp axis J.

  The circuit board clamping piece 63 is for fixing the circuit board 20a constituting a part of the power supply circuit 20 to the seating portion 62 in a state of clamping the circuit board 20a. The circuit board clamping piece 63 includes a first clamping piece 63a and a second clamping piece 63b. And the circuit board 20a is fixed to the seating part 62 in the state where the peripheral part was clamped by the 1st clamping piece 63a and the 2nd clamping piece 63b in the thickness direction of the circuit board 20a. Here, as shown in FIG. 2, the circuit board 20a is fixed to the inner side of the seating portion 62, and most of both end edges in the direction orthogonal to the cylinder axis direction of the housing 60 in the circuit board 20a ( The portion from the portion corresponding to the lower end edge of the seating portion 62 in FIG. 2 to the portion separated by the length L2 on the upper end side is in contact with the seating portion 62. Accordingly, for example, compared with the configuration in which only the lower end portion of the circuit board 20a is in contact with the seating portion 62, the contact area with the seating portion 62 is larger, so that the transmission from the circuit board 20a to the seating portion 62 is increased. Thermal efficiency can be improved. In addition, since most of the both end edges of the circuit board 20a are supported by the circuit board clamping pieces 63, the swing of the circuit board 20a when an impact is applied to the lamp 1 can be suppressed. Therefore, for example, as compared with the configuration in which only the lower end portion of the circuit board 20a is supported by the circuit board holding piece 63, even when an impact is applied to the lamp 1, the space between the circuit board 20a and the first cylindrical member 64 is not limited. There is an advantage that electrical insulation can be secured.

  By the way, in the lamp 1 according to the present embodiment, the inner diameter of the main body 61 in a plane that includes a portion that is orthogonal to the central axis of the main body 61 and that contacts the seating portion 62 and the base 70 is the base. It is larger than the outer diameter of the lower surface of 70. Thereby, in a state where the base 70 is seated on the seating portion 62, the upper surface of the seating portion main body 621 that constitutes a part of the seating portion 62 and the upper end surface of the protruding portion 62c are The part 70b and the whole protrusion part 70c contact | abut.

  4A is a schematic cross-sectional view of the housing 60 according to the present embodiment, and FIG. 4 is a schematic cross-sectional view of the same portion as the enlarged view of FIG. 4A of the housing 2060 according to the comparative example. Shown in (b). The casing 2060 according to the comparative example is different from the second cylindrical member 66 according to the present embodiment in the shape of the upper end portion of the second cylindrical member 2066.

  As shown in FIG. 4A, the housing 60 has a three-layer structure including a first cylindrical member 64, a second cylindrical member 66, and a seating portion 62. The upper end surface of the first cylindrical member 64 is exposed without being covered by a part of the second cylindrical member 66.

On the other hand, as shown in FIG. 4B, in the casing 2060 according to the comparative example, an inner flange portion in which a part of the upper end surface of the first cylindrical member 64 is formed at the upper end portion of the second cylindrical member 66. It is covered with 2066a. Here, it is assumed that the first cylindrical member 64 is made of Al which is a metal material, and the second cylindrical member 2066 is made of polybutylene terephthalate. Here, the thermal expansion coefficient of Al constituting the first cylindrical member 64 is about 25 × 10 ⁻⁶ [1 / K], whereas the heat of the polybutylene terephthalate constituting the second cylindrical member 2066. The expansion coefficient is about 60 × 10 ⁻⁶ [1 / K]. Accordingly, when the casing 2060 is placed in an environment with a large temperature change, the casing 2060 has a second cylindrical shape due to the difference in thermal expansion coefficients of the materials constituting the first cylindrical member 64 and the second cylindrical member 2066. Stress is applied to the member 2066. Specifically, when the ambient temperature rapidly decreases, the contraction width of the second cylindrical member 2066 becomes larger than the contraction width of the first cylindrical member 64, and as a result, the inner flange portion of the second cylindrical member 2066. A force is applied to 2066a in a direction in which the housing 2060 is pushed up along the cylinder axis direction. When the force applied to the inner flange portion 2066a is large, there is a possibility that a crack or the like may occur in the second cylindrical member 2066.

  On the other hand, in the housing 60 according to the present embodiment, the upper end surface of the first cylindrical member 64 is exposed without being covered by a part of the second cylindrical member 66. Thereby, even in an environment with a large temperature change, the stress applied to the second cylindrical member 66 due to the difference in the thermal expansion coefficients of the materials constituting the first cylindrical member 64 and the second cylindrical member 2066, respectively. Can be reduced.

  The housing 60 is formed by integrally molding (so-called insert molding) a first cylindrical member 64 made of a metal material, a second cylindrical member 66 made of a resin material, and a seating portion 62. Specifically, in a state where the first cylindrical member 64 is disposed in the mold, the molten cylindrical resin material is filled in the mold, and the resin material is solidified to thereby solidify the first cylindrical member made of a metal material. A housing 60 in which the second cylindrical member 66 made of a resin material and the seating portion 62 are integrated is formed. Thereby, the seating part 62 and the 2nd cylindrical member 66 comprise the continuous body. Here, “continuous body” means one continuous member.

  Further, as shown in FIGS. 1 and 2, a portion of the inner peripheral surface of the first cylindrical member 64 covered with the seating portion 62 (hereinafter referred to as “covered portion”) is at least from the window portion 62b. It is set so that insulation between the exposed first cylindrical member 64 and the lead tip portion 26 protruding from the circuit board 20a can be secured. Here, the area of the covering portion is preferably set in consideration of manufacturing variations in the protruding amount of the lead tip portion 26. Specifically, the manufacturing variation of the protrusion amount of the lead tip portion 26 is grasped in advance, and when the protrusion amount of the lead tip portion 26 takes the maximum value among the variation of the protrusion amount, the lead tip portion 26 is detected. It is preferable to set the area of the covering portion so that electrical insulation between the first cylindrical member 64 and the first cylindrical member 64 can be ensured.

  As described above, the covering portion is set in consideration of ensuring insulation between the first cylindrical member 64 exposed from the window portion 62b and the lead tip portion 26 protruding from the circuit board 20a. Compared to the configuration in which only the lower end portion of the inner peripheral surface of the first cylindrical member 64 is covered with the insulating member, it is easier to ensure the insulation between the first cylindrical member 64 and the lead wire end portion 26. There are advantages.

<Base>
As shown in FIG. 3, the base 70 is formed in a substantially disc shape, and the base 70 is placed in a portion corresponding to the screw hole 62 a provided in the seating portion 62 of the housing 60. A through hole 70d is formed through which a screw 72 for fixing the screw 72 is inserted. Further, a through-hole for allowing the twisted pair wiring 24 led out from the power supply circuit 20 to be inserted from the lower surface (second main surface) side to the upper surface (first main surface) side of the base 70 is provided at a substantially central portion of the base 70. A hole 70e is provided. Here, the through hole 70d has a first through hole 70d1 whose inner diameter is substantially equal to the outer diameter of the shaft portion 72a of the screw 72, and an inner diameter larger than that of the first through hole 70d1 and the outer diameter of the head 72b of the screw 72. The second through hole 70d2 is substantially equal. When the screws 72 are inserted into the through holes 70d and the screws 72 inserted into the through holes 70d are screwed into the screw holes 62a provided in the seating portion 62 of the housing 60, the base 70 is obtained. Is fixed to the housing 60.

  The base 70 is made of, for example, a metal material. Examples of the metal material include a pure metal composed of a single metal element such as Al, Ag, Au, Ni, Rh, and Pd, and an alloy composed of a plurality of metal elements or a metal element and a nonmetal element. It is done. Since the metal material has good thermal conductivity, heat generated in the light emitting module 40 is efficiently conducted to the housing 60 side. In addition, the material which comprises the base 70 is not limited to a metal material, For example, resin and a ceramic may be sufficient. Further, the shape of the base 70 is not limited to a disk shape, and may be, for example, an ellipse, a polygon, or an annular shape in plan view.

  A screw hole 70 f for fixing the light emitting module 40, the light scattering member 52, and the reflection member 54 to the base 70 with a screw 56 is provided in a region surrounding the through hole 70 e in the base 70. Three screw holes 70f are arranged at equal intervals around the through hole 70e.

  As shown in FIG. 2, a flange 70 b that protrudes downward from the base 70 is provided at the peripheral edge of the base 70. The flange portion 70 b is provided over the entire peripheral edge portion of the base 70. The distal end portion of the flange portion 70 b has a planar shape substantially parallel to the upper surface of the base 70. In the state where the base 70 is fixed to the housing 60, the entire distal end portion of the collar portion 70 b comes into contact with the upper end surface of the seating portion main body 621 of the seating portion 62. At this time, the front end portion of the flange portion 70b and the upper end surface of the seating portion main body 621 are in surface contact.

  Furthermore, a projecting portion 70 c projecting downward is provided at a position corresponding to the outer peripheral portion of the through hole 70 d on the lower surface of the base 70. The tip of the projecting portion 70 c has a planar shape substantially parallel to the upper surface of the base 70. In a state where the base 70 is fixed to the housing 60, the distal end portion of the protruding portion 70 c comes into contact with the upper end surface of the protruding portion 62 c of the seating portion 62. At this time, the tip part of the protrusion part 70c and the upper end surface of the protrusion part 62c are in surface contact.

  That is, the upper end surface of the protruding portion 62 c of the seating portion 62 is in contact with the peripheral portion on the lower surface of the base 70, that is, the distal end portion of the protruding portion 70 c. The seat portion main body 621 of the seat portion 62 has a cylindrical shape and is formed in an annular shape when viewed from the lamp axis J direction, and abuts the entire peripheral portion of the lower surface of the base 70, that is, the entire collar portion 70b. ing.

  Further, the depth of the second through hole 70d2 is larger than the thickness of the head 72b of the screw 72. Thereby, in a state where the screw 72 is screwed into the screw hole 62 a, the head portion 72 b of the screw 72 does not protrude to the upper surface side of the base 70.

  A light emitting module 40 is provided on the upper surface of the base 70. Here, the light emitting module 40 is fixed to the base 70 by screwing the screw 56 into the screw hole 70f while being seated on the upper surface side of the base 70.

<2> Step of Attaching Base to Case The step of attaching the base 70 to the case 60 in the lamp 1 according to the present embodiment will be described.

  FIG. 5 is a cross-sectional view for explaining the process of attaching the base 70 to the housing 60 for the lamp 1.

  First, with the lower surface (second main surface) of the base 70 facing the lower end side of the housing 60, the base 70 extends from the upper end portion toward the lower end portion along the central axis (lamp axis J) of the housing 60. Is moved into the housing 60 (see the arrow in FIG. 5A). Here, when the position of the through hole 70d of the base 70 and the position of the screw hole 62a provided in the projecting portion 62c constituting a part of the seating portion 62 are viewed from the direction along the lamp axis J. Make sure they match. The upper end surfaces of the seat portion main body 621 and the projecting portion 62c constituting a part of the seat portion 62 are the lower surfaces of the base 70, specifically, the distal end portion of the flange portion 70b and the distal end portion of the projecting portion 70c. Abut. Then, the base 70 is maintained in a posture determined by the positional relationship of the seating portion 62 in the housing 60. Here, the positional relationship of the seating portion 62 in the housing 60 is such that the upper end surfaces of the seating portion main body 621 and the protruding portion 62c are below the upper end surface of the first cylindrical member 64 in the lamp axis J direction. The positional relationship is such that it is positioned and substantially orthogonal to the central axis (lamp axis J) of the first cylindrical member 64. From the positional relationship of the seating portion 62, the posture of the base 70 is determined such that the upper surface (first main surface) is substantially orthogonal to the central axis (lamp axis J) of the main body portion 61.

  Next, in a state where the base 70 is seated on the seating portion 62, the screw 72 is inserted into each of the through holes 70 d of the base 70, and the screw 72 is provided in the protruding portion 62 c of the housing 60. The base 70 is fixed to the housing 60 by being screwed onto the housing 60 (see the arrow in FIG. 5B).

  Here, consider the case of manufacturing a plurality of lamps 1. When the above-described base 70 is caused to enter the housing 60, the inclination of the base 70 may vary among the plurality of lamps 1. In particular, when the work of causing the base 70 to enter (fit) the housing 60 is performed manually, the inclination variation of the base 70 with respect to the lamp axis J among the plurality of lamps 1 becomes large. On the other hand, in the lamp 1, the posture of the base 70 in the housing 60 is determined by the positional relationship of the seating portion 62 in the housing 60 regardless of the inclination of the base 70 with respect to the lamp axis J.

  Incidentally, when the screw 72 is screwed into the screw hole 62a in a state where the base 70 is seated on the seat portion 62, a force may be applied to the base 70 in a direction in which the posture of the base 70 is changed. On the other hand, in the lamp 1, since the seating portion 62 restricts the movement of the base 70, the same posture is maintained when the base 70 is fixed to the housing 60.

  As described above, when a plurality of lamps 1 are manufactured, it is possible to reduce variations in the posture of the base 70 after the base 70 is fixed to the housing 60 between the plurality of lamps 1. Therefore, it is possible to reduce the variation in the main emission direction of the light emitting module 40 provided on the upper surface of the base 70 between the plurality of lamps 1, and consequently reduce the variation in the light distribution characteristics of the lamp 1.

  Compared to the configuration described in FIGS. 18 and 19 and the configuration in which the outer diameter of the base is slightly larger than the inner diameter of the casing and the base is press-fitted and fixed to the casing, Since variations can be reduced, there is an advantage that variations in light distribution characteristics of the lamp 1 can be reduced.

<3> Summary Eventually, the lamp 1 according to the present embodiment is from the upper end along the central axis (lamp axis J) of the housing 60 with the lower surface of the base 70 facing the lower end of the housing 60. The base 70 is made to enter the housing 60 toward the lower end, and the upper surfaces of the seating portion main body 621 and the projecting portion 62c constituting a part of the seating portion 62 abut against the lower surface of the base 70. When the base 70 is seated on the upper end surfaces of the seating portion main body 621 and the projecting portion 62c, the base 70 is maintained in a posture determined by the positional relationship of the seating portion 62 in the housing 60. As a result, when manufacturing a plurality of lamps 1, even if the inclination of the base 70 when the base 70 enters the housing 60 varies among the plurality of lamps 1, The posture of the base 70 after fixing the base 70 to the housing 60 can be made substantially the same among the plurality of lamps 1.

  Incidentally, the lamp 1001 described with reference to FIG. 18 is not provided with a structure for maintaining the posture when the base 1070 is brought into contact with the inside of the housing 1060. Accordingly, the posture of the base 1070 becomes one posture (for example, a posture in which the surface P1 on the light emitting module 1040 side of the base 1070 is orthogonal to the central axis J0 of the housing 1060, see FIG. 19B). Even if the base 1070 is fitted inside the housing 1060, the direction of the base 1070 is changed from the peripheral wall of the housing 1060 to the base 1070 when the peripheral wall of the housing 1060 is caulked. And the posture of the base 1070 is different from the one posture described above (for example, the posture in which the surface P1 is inclined with respect to the surface P0 orthogonal to the central axis J0 of the housing 1060, FIG. c)).

  As described above, when the posture of the base 1070 is frequently changed when the peripheral wall of the housing 1060 is caulked, the base 1070 is placed between the plurality of lamps 1001 when the plurality of lamps 1001 are manufactured. The manufacturing variation of the posture of the base 1070 after being fixed to the base increases.

  On the other hand, in the lamp 1 according to the present embodiment, the housing 60 has a seating portion 62 on which the base 70 is seated, and the seating portion 62 regulates the movement of the base 70. Yes. Thereby, since the change of the attitude | position of the base 70 at the time of fixing the base 70 to the housing | casing 60 can be suppressed, when manufacturing the lamp | ramp 1 in multiple numbers, the base | substrate 70 is attached to the housing | casing 60 between several lamp | ramps 1. Variations in the posture of the base 70 after being fixed can be reduced.

  Further, in the lamp 1 according to the present embodiment, in a state where the base 70 is fixed to the housing 60, the inner peripheral surface of the second cylindrical member 64 and the periphery of the base 70 facing the inner peripheral surface. There is a gap between the surfaces.

  FIG. 6A shows a partially broken plan view of the lamp 1 in a state where the light emitting module 40, the globe 50, the light scattering member 52, and the reflecting member 54 are removed.

  As shown in FIG. 6A, the gap W between the inner peripheral surface of the second cylindrical member 64 and the peripheral surface of the base 70 occurs over substantially the entire peripheral edge of the base 70. . This is due to the following reason.

  In the manufacturing process of the lamp 1, the base 70 is rotated around the central axis (lamp axis J) of the housing 60 with respect to the housing 60, and the position of the through hole 70 d of the base 70 and the protrusion of the seating portion 62. Adjustment is made so that the position of the screw hole 62a provided in the portion 62c matches when viewed from the lamp axis J direction. At this time, if the inner peripheral surface of the second cylindrical member 64 and the peripheral surface of the base 70 are in surface contact, it is difficult to rotate the base 70 with respect to the housing 60 due to friction of the contact portion. . Therefore, by providing a gap W between the inner peripheral surface of the second cylindrical member 64 and the peripheral surface of the base 70, the base 70 can be easily rotated with respect to the casing 60, and the casing of the base 70 can be rotated. The position adjustment with respect to the body 60 is facilitated.

  FIG. 6B shows the relationship between the temperature of the base 70 and the size of the gap W when the light emitting module 40 is turned on.

  As shown in FIG. 6B, the temperature of the base 70 when the light emitting module 40 is turned on increases substantially exponentially as the gap W increases.

  Here, when the temperature of the base 70 rises, the temperature of the light emitting module 40 also rises, and as a result, the light emission efficiency of the light emitting unit 44 decreases. Therefore, the upper limit value of the allowable temperature of the base 70 needs to be set to a value determined from the upper limit value of the allowable temperature of the light emitting module 40. The allowable temperature of the light emitting module 40 is determined from the temperature characteristics of the light emitting unit 44 of the light emitting module 40. In the lamp 1 according to the present embodiment, the upper limit value of the gap W is set so that the upper limit value of the allowable temperature of the base 70 does not exceed a value determined from the upper limit value of the allowable temperature of the light emitting module 40. ing. For example, in the case of the lamp 1 with power consumption of 6 W, if the upper limit value Tth of the allowable temperature of the base 70 is about 90 ° C., the upper limit value Wth of the gap W is about 100 μm.

<Embodiment 2>
FIG. 7 shows the structure of lighting device 501 according to this embodiment.

  The lighting device 501 includes the lamp 1 according to Embodiment 1 and a lighting fixture 503. Here, the luminaire 503 is a so-called downlight illumination device.

  The luminaire 503 is connected to a socket 505 that is electrically connected to the lamp 1 and holds the lamp, a bowl-shaped reflector 507 that reflects light emitted from the lamp 1 in a predetermined direction, and an external commercial power source. Connecting portion 509.

  Here, the reflector 507 is attached to the ceiling 511 through the opening 513 of the ceiling 511 so that the socket 505 side is located on the back side of the ceiling 511.

  In addition, the structure of the illuminating device shown in FIG. 7 is a mere example, and is not limited to the above-mentioned lighting fixture for downlights. Further, in the lighting device 501, the lamp axis J of the lamp 1 is arranged so as to substantially coincide with the central axis of the bowl-shaped reflector 507, but the lamp axis J of the lamp 1 is the center of the reflector 507. You may arrange | position in the state inclined with respect to the axis | shaft. Furthermore, a part of the power supply circuit 20 built in the lamp 1 may be arranged on the lighting fixture 503 side.

<Modification>
(1) In the first embodiment, the example in which the seating portion 62 has a shape including the cylindrical seating portion main body 621 and the protruding portion 62c has been described. However, the shape of the seating portion is limited to this. is not.

  FIG. 8A shows a plan view of the housing 260 according to this modification, and FIG. 8B shows a cross-sectional view taken along line AA in FIG. 8A. In addition, about the structure similar to Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted suitably.

  The housing 260 includes a plurality (three in FIG. 8) of sub-sitting portions 262b. Each of the three sub-seat portions 262b is in contact with three positions on the peripheral portion of the lower surface of the base 70, specifically, the tip ends of the three protrusions 70c that protrude downward from the base 70. . Each sub-seat portion 262b is formed with a screw hole 262a opened at the upper end surface. Further, the housing 260 includes a circuit fixing portion 262 c for fixing the power supply circuit 20 inside the housing 260. The circuit fixing portion 262c is provided with a circuit board holding piece 263 including a first holding piece 263a and a second holding piece 263b. In addition, in this modification, although the example which has three sub seating parts 262b was demonstrated, it is not limited to this, Four or more sub seating parts may be sufficient. In addition, it is not necessary that all the sub-seats have screw holes. Instead, screw holes are made in some of the sub-seat parts, and screw holes are made in other sub-seat parts. It may not be.

  Further, as shown in FIG. 8A, the sub seating portions 262b are arranged at equal intervals around the central axis (lamp axis J) of the housing 260. That is, when viewed from the direction along the lamp axis J, angles θ1, θ2, and θ3 formed by imaginary lines connecting the lamp axis J and the center of the screw hole 262a provided in each sub-seat portion 262b are mutually equal. Are equal. Thereby, the locations where the sub-seat portion 262b contacts the base 70 are arranged at equal intervals in the circumferential direction of the lower surface of the base 70, and the posture of the base 70 in a state where the base 70 is seated on the sub-seat portion 262b. Is stable.

  Further, if the outer dimensions of the housing 60 and the housing 260 are substantially the same, the volume of the seating portion 262 according to this modification is smaller than the volume of the seating portion 62 according to the first embodiment. When the seating portion 62 according to the first embodiment and the seating portion 262 are made of the same material, the weight of the seating portion 262 is smaller than the weight of the seating portion 62 according to the first embodiment. Become. Therefore, when both the seating portions 62 and 262 are made of the same material, the housing 260 according to this modification example has the weight of the seating portion 62 and the seating portion 262 compared to the housing 60 according to the first embodiment. The weight can be reduced by an amount corresponding to the difference from the weight.

  (2) In the first embodiment, the example in which the seating portion 62 has the seating portion main body 621 and the three projecting portions 62c has been described. It is not limited.

  FIG. 9A shows a plan view of the housing 360 according to this modification, and FIG. 9B shows a plan view of the housing 460 according to another modification. In addition, about the structure similar to Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted suitably.

  As shown in FIG. 9A, the housing 360 includes a main body portion 61 and a seating portion 362. The seating part 362 includes a seating part main body 3621, a protruding part 362 c, and a circuit board clamping piece 63.

  Similarly to the first embodiment, the seating portion main body 3621 is formed in a substantially cylindrical shape and covers the entire portion of the inner wall of the first cylindrical member 64 except for the upper end portion.

  The protruding portion 362 c protrudes toward the central axis of the seating portion main body 3621 over the entire upper end portion of the seating portion main body 3621. A screw hole 362 a into which a screw 72 for fixing the base 70 to the housing 60 is screwed is formed in the protruding portion 362 c. Further, notches 362b are formed at two locations corresponding to the circuit board sandwiching piece 63 in the protruding portion 362c.

  In the housing 360 according to this modification, the area of the upper end surface of the protrusion 362c is larger than the area of the upper end surface of the protrusion 62c of the seat 62 according to the first embodiment. Thereby, the attitude | position of the base 70 in the state in which the base 70 was seated on the seating part 362 is stabilized.

  Furthermore, since the seat portion main body 3621 covers the entire portion of the inner wall of the first cylindrical member 64 except for the upper end portion, the power supply circuit 20 arranged on the inner side of the seat portion main body 3621 and the metal The electrical insulation of one cylindrical member 64 can be ensured.

  As illustrated in FIG. 9B, a housing 460 according to another modification includes a main body portion 61 and a seating portion 462. The seating portion 462 includes a seating portion main body 4621, a plurality of projecting portions 462 c, and a circuit board sandwiching piece 63.

  The seating portion main body 4621 is formed in a substantially cylindrical shape and covers the entire portion of the inner wall of the first cylindrical member 64 except for the upper end portion.

  The protrusions 462 c protrude from the four positions at the upper end of the seating portion main body 4621 toward the central axis of the seating portion main body 4621. Each protrusion 462c is formed with a screw hole 462a into which a screw for fixing the base to the housing 460 is screwed. Here, the base is fixed to the housing 460 by four screws. And the protrusion part is provided in the four positions corresponding to each protrusion part 62c in the surface side which opposes the upper end surface of the protrusion part 62c in a base, The upper end surface of the protrusion part 62c is the said base. It is fixed to the housing 460 in a state of being in contact with the tip of the protruding portion.

  In the housing 460 according to the present modification, the four protrusions 462 c are provided, so that the posture of the base in a state where the base is seated on the seating part 462 is stabilized.

  (3) In the first embodiment, the base 70 is restricted from rotating around the central axis of the housing 60 with respect to the housing 60 in a state where the base 70 is seated on the seating portion 62 of the housing 60. It is not limited to this.

  An example of the housing 560 and the base 570 according to this modification is shown in FIG. 10, and a partial cross-sectional view of the base 570 seated on the seating portion 562 of the housing 560 is shown in FIG. In addition, about the structure similar to Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted suitably.

  As shown in FIG. 10, the housing 560 includes a main body portion 61 and a seating portion 562. The seat portion 562 includes a seat portion main body 5621, a projecting portion 62 c, and a circuit board sandwiching piece 63. Here, recessed portions 562d are provided at two locations on the upper end portion of the seating portion main body 5621 facing each other across the central axis. On the other hand, convex portions 570 h protruding downward are provided at two locations on the peripheral portion of the lower surface of the base 70.

  Then, as shown in FIG. 12A, the convex portion 570 h of the base 70 is engaged with the concave portion 562 d of the seat portion 562 in a state where the base 70 is seated on the seat portion 562. Accordingly, in a state where the base 70 is seated on the seating portion 562, the base 570 is restricted from rotating around the central axis (lamp axis J) of the housing 560 with respect to the housing 560. That is, the base 570 rotates around the central axis (lamp axis J) of the housing 560 with respect to the housing 560 from the concave portion 562d provided in the housing 560 and the convex portion 570h provided in the base 570. A restricting means for restricting the operation is configured.

  Further, an example of a housing 660 and a base 670 according to another modification is shown in FIG. 11, and a partially broken plan view in a state where the base 670 is seated on the seat 62 of the housing 660 is shown in FIG. Shown in b). In addition, about the structure similar to Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted suitably.

  As shown in FIG. 11, the housing 660 includes a main body portion 661 and a seating portion 62. The main body 661 includes a first cylindrical member 664 and a second cylindrical member 66. Here, in the upper end portion of the first cylindrical member 664, concave portions 664a are provided at two locations facing each other across the central axis. On the other hand, convex portions 670 h protruding in the radial direction are provided at two locations on the peripheral surface on the lower surface side of the base 70.

  Then, as shown in FIG. 12 (b), in a state where the base 70 is seated on the seating portion 62, the convex portion 670 h of the base 70 is formed in the concave portion 664 a provided at the upper end portion of the first cylindrical member 664. Engage. Thereby, in a state where the base 70 is seated on the seating portion 62, the base 70 is restricted from rotating around the central axis (lamp axis J) of the housing 660 with respect to the housing 660. That is, the base 670 rotates around the central axis (lamp axis J) of the housing 660 with respect to the housing 660 from the concave portion 664 a provided in the housing 660 and the convex portion 670 h provided in the base 670. A restricting means for restricting the operation is configured.

  In this modification, the example in which the restricting means is provided in the housings 560 and 660 and the bases 570 and 670 has been described. However, the present invention is not limited to this, and the restriction is limited to only one of the housing and the base. Means may be provided.

  (4) In the first embodiment, the housing 60 includes the main body 61 and the seat 62, and the main body 61 includes the first cylindrical member 64 made of a metal material and the second cylindrical shape made of an insulating material. Although the example which consists of the member 66 was demonstrated, the structure of the housing | casing 60 is not limited to this.

  A cross-sectional view of the lamp 2 according to this modification is shown in FIG. In addition, about the structure similar to Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted suitably.

  A housing 760 according to this modification includes a substantially cylindrical main body portion 761 and a seating portion 762. And the main-body part 761 consists of the 1st cylindrical member 764 which consists of insulating materials, such as resin, and the 2nd cylindrical member 766 which consists of metal materials. Here, the first cylindrical member 764 includes a covering portion 764a and a base attaching portion 764b. The covering portion 764a is reduced in diameter from the upper side to the lower side. The base attaching portion 764b is continuous at the lower end side of the covering portion 764a and extends below the covering portion 764a. The second cylindrical member 766 covers the outer peripheral surface of the covering portion 764 a, and the upper end portion extends upward from the upper end portion of the covering portion 764 a of the first cylindrical member 764. A part of the inner peripheral surface of the upper end portion of the second cylindrical member 766 is disposed in a state of facing the peripheral surface of the base 70.

  According to this configuration, since the second cylindrical member 766 is exposed to the outside of the lamp 2, the heat transmitted from the base 70 to the second cylindrical member 766 is easily released to the outside. Therefore, the heat dissipation of the heat generated in the light emitting module 40 to the outside of the lamp 2 can be improved.

  (5) In the first embodiment, the example in which the seat 62 and the second cylindrical member 66 are integrally formed from one kind of resin material has been described. However, the present invention is not limited to this. It may be formed from two or more types of resin materials by a multicolor molding method (for example, a two-color molding method).

  FIG. 14 shows a perspective view of the lamp 3 according to this modification. In addition, about the structure similar to Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted suitably.

  The lamp 3 is a resin material in which the first portion 866a on the upper end side (one end side in the direction of the central axis (lamp axis J) of the casing 860) in the second cylindrical member 866 of the casing 860 has translucency. The second portion 866b, which is located on the lower end side of the first portion 866a, is formed from a non-translucent resin material.

  According to this configuration, of the second cylindrical member 866, the first part 866a located on the upper end side thereof, that is, the part close to the globe 50 has translucency. Thereby, light incident on the inner peripheral surface of the upper end portion of the second cylindrical member 866 out of the light emitted from the light emitting module 40 is radiated to the outside without being blocked by the second cylindrical member 866. Therefore, there is an advantage that the utilization efficiency of the light emitted from the light emitting module 40 can be improved.

  Moreover, you may make it change the kind of resin material with the coating | coated part 66a and the nozzle | cap | die attachment part 66b in the 2nd cylindrical member 66. FIG. For example, the resin material may be selected with priority given to the thermal conductivity for the covering portion 66a, and the resin material may be selected with priority given to the strength over the thermal conductivity for the base mounting portion 66b. . Thereby, while aiming at the heat dissipation improvement of the housing | casing 60, the intensity | strength improvement of the site | part by which the nozzle | cap | die 10 is fitted outside can be aimed at.

  Furthermore, the design of the lamp 1 can be improved by multicolor molding using resin materials having different colors.

  (6) In Embodiment 1, although the lamp 1 provided with the light-scattering member 52, the reflection member 54, and the globe 50 was demonstrated, these members are not essential structures. For example, the structure without a light-scattering member and a reflecting member may be sufficient. Or the structure which is not provided with a glove | globe may be sufficient.

  (7) In the first embodiment, an example in which the housing 40 is formed by integrally molding (so-called insert molding) the seating portion 62, the first cylindrical member 64, and the second cylindrical member 66 has been described. . However, the structure of the housing is not limited to this. For example, the inner shell member composed of the seating portion and the base attachment portion of the second cylindrical member and the outer shell member composed of the covering portion of the first cylindrical member and the second cylindrical member may be separate. .

  A sectional view of a lamp 1101 according to this modification is shown in FIG. In addition, about the structure similar to Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted suitably.

  The housing 1160 includes an outer shell member 1161 and an inner shell member 1168.

  The outer shell member 1161 includes a first cylindrical member 1164 and a covering portion 1166 that covers the outer peripheral surface of the first cylindrical member 1164. Here, the first cylindrical member 1164 and the covering portion 1166 are formed by integral molding.

  The inner shell member 1168 includes a seating portion 1162 and a base attaching portion 1167. The base attaching portion 1167 is continuous with the lower end portion of the seating portion 1162, and extends below the lower end portion of the seating portion 1162.

  Next, a method for assembling the structure including the housing 1160 and the base 10 will be described.

  FIGS. 16A and 16B are schematic views for explaining a method of assembling the structure including the casing 1160 and the base 10 according to this modification.

  First, as shown in FIG. 16A, the inner shell member 1168 is inserted from the upper opening of the outer shell member 1161 along the cylinder axis direction of the outer shell member 1161 (see arrows). Then, the inner peripheral surface of the first cylindrical member 1164 constituting a part of the outer shell member 1161 is brought into contact with the outer peripheral surface of the seating portion 1162 of the inner shell member 1168. At this time, the male screw portion of the base attaching portion 1167 is projected from the lower opening of the outer shell member 1161.

  Next, as shown in FIG. 16B, the base 10 is fitted onto the male screw part of the base attaching part 1167 (see arrow).

  Here, the outer shell member 1161 is fixed to the inner shell member 1168 by the base 10.

  According to this configuration, the outer shell member 1161 and the inner shell member 1168 are separated from each other, and therefore, due to the difference between the thermal expansion coefficient of the outer shell member 1161 and the thermal expansion coefficient of the inner shell member 1168. Generation of stress in the housing 1160 can be suppressed. Accordingly, the occurrence of cracks and the like of the housing 1160 due to the occurrence of stress in the housing 1160 can be suppressed.

  In addition, although this modification demonstrated the example which the inner peripheral surface of the 1st cylindrical member 1164 and the outer peripheral surface of the seating part 1162 contact | abutted, it is not necessarily limited to the structure which contact | abuts. . For example, a gap may be formed between the inner peripheral surface of the first cylindrical member 1164 and the outer peripheral surface of the seating portion 1162.

  (8) In the first embodiment, the first cylindrical member 64 is in close contact with the inner peripheral surface of the second cylindrical member 66, and the seat 62 is in close contact with the inner peripheral surface of the first cylindrical member 64. An example was described. However, the inner peripheral surface of the second cylindrical member 66 and the first cylindrical member 64, and the inner peripheral surface of the first cylindrical member 64 and the seating portion 62 are not necessarily limited to those in close contact with each other. Absent.

  A sectional view of another lamp 1201 according to this modification is shown in FIG. In addition, about the structure similar to Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted suitably.

  The housing 1260 includes a first cylindrical member 1264, a second cylindrical member 1266, and an inner shell member 1268.

  The 1st cylindrical member 1264 is provided with the cylindrical part 1264a and the annular | circular shaped inner collar part 1264b extended in the lower end of the cylindrical part 1264a. The opening end of the globe 50 is disposed inside the upper opening end of the first cylindrical member 1264.

  The second cylindrical member 1266 includes a first cylindrical portion 1266a, an annular inner flange portion 1266b extending from the lower end of the first cylindrical portion 1266a to the inside of the first cylindrical portion 1266a, and an inner flange portion 1266b. And a second cylindrical portion 1266c extending downward from the inner periphery. The second cylindrical member 1266 covers the outer peripheral surface of the first cylindrical member 1264.

  The inner shell member 1268 includes a seating portion 1262, a base attaching portion 1267, and a circuit board holding piece 63. The seating portion 1262 is formed in a substantially cylindrical shape. A male screw portion is formed on the outer wall of the base attaching portion 1267. Then, the base 10 is externally fitted to the male screw portion of the base mounting portion 1267 protruding from the lower opening of the first cylindrical member 1264 with the seating portion 1262 disposed inside the first cylindrical member 1264. The Here, the inner flange portion 1264b of the first cylindrical member 1264 is sandwiched between the lower end portion of the seating portion 1262 and the inner flange portion 1266b.

  Here, a gap is formed between the inner peripheral surface of the second cylindrical member 1266 and the outer peripheral surface of the first cylindrical member 1264. A gap is also formed between the inner peripheral surface of the first cylindrical member 1264 and the outer peripheral surface of the seating portion 1262. Thereby, even if each of the first cylindrical member 1264, the second cylindrical member 1266, and the seating portion 1262 expands or contracts due to a temperature change caused by turning on / off the lamp 1201, they do not interfere with each other. Further, it is possible to prevent the casing 1260 from being damaged by the stress generated due to the difference in the thermal expansion coefficients of the materials constituting the first cylindrical member 1264, the second cylindrical member 1266, and the seating portion 1262.

  The gap between the inner peripheral surface of the second cylindrical member 1266 and the outer peripheral surface of the first cylindrical member 1264, or the inner peripheral surface of the first cylindrical member 1264 and the outer peripheral surface of the seating portion 1263. The gap between them may be filled with a resin material having elasticity. An example of this type of resin material is a silicone resin.

1, 2, 1101, 1201 Lamp 40 Light emitting module 60, 260, 360, 460, 560, 660, 760 Housing 61, 661, 761 Main body 62, 362, 462, 562, 762 Seating portion 62b Window portion 62c, 362c, 462c Protruding part 64, 664, 764 First cylindrical member 66, 766, 866 Second cylindrical member 66a, 764a Covering part 66b, 764b Base attachment part 70, 570, 670 Base 262a Sub seating part 362b Notch 501 Lighting device

Claims (5)

A casing formed in a cylindrical shape and having a diameter reduced from one end to the other end in the central axis direction;
A base formed in a plate shape and disposed inside the one end of the housing;
A light emitting module provided on the first main surface of the base,
The housing is
A first member formed of metal and having a cylindrical shape;
A second member covering the outer peripheral surface of the first member;
A seat portion that is formed in a cylindrical shape and covers at least a portion of the inner peripheral surface of the first member;
The lamp is characterized in that a peripheral edge of the second main surface opposite to the first main surface of the base is seated on at least a part of the seating portion . The inner diameter of the first member in the cross section when taken along a virtual plane in which the center axis perpendicular to and on the base of the seat deposition part comprises a surface that seats of the first member, said base of said second main The lamp according to claim 1 , wherein the lamp is larger than an outer diameter of the surface. At least one of the casing and the base is configured such that the base rotates around the central axis of the casing with respect to the casing in a state where the base is seated on the seating portion. lamp according to any one of claims 1 or 2, characterized in that the regulating means for regulating is provided. Wherein the second member and the seat wear part, one continuous claim 1, wherein the lamp, characterized in that it consists of members. An illumination device comprising the lamp according to any one of claims 1 to 4 .

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